Only he can be a leader who never loses hope.
Bapu Ke Ashirwad
February 12, 1946

What could be a more accurate, and simpler, definition of a leader than this? Bapu – more commonly known as Mohandas Gandhi – both believed in, and embodied, this statement. His hope to bring about change in society never waned, even after he was thrown out of a train at Peitermaritzburg Station in South Africa. He did not give up hope after the outbreak of violence by Satyagrahis in Chauri Chaura, during the first Civil Disobedience movement in 1920, which he suspended despite the fact that most of his colleagues felt they were on the verge of victory. Only Bapu was confident that he could suspend the movement and revive it later, when he was more assured about the readiness of his people and their discipline.

It is all too easy for leaders to become hostages to their followers, especially if they are fearful of possible backlash that could result from admonishing or criticizing them. Movements and protests can spiral out of a leader’s control and further devolve into chaos and violence. This lack of control, and discipline, is the opposite of leadership. A leader is one who has the ability to navigate the actions of his or her followers, ensuring they do not violate their principles: he or she should not succumb to populism. Bapu exhibited this ability throughout his entire life, both as a public entity and in his Ashram (religious) life.

Bapu founded one ashram in Ahmedabad, India, in 1915. He performed many Ashram rituals himself, and made these into a daily practice, which the Ashramites saw and emulated. He eventually went on to develop a system of virtues which he called the “11 Vows” (Ekadashi Vrat):

1. Ahimsa (Non-violence)
2. Satya (Truth)
3. Asteya (Not stealing)
4. Bhramhcharya (Celibacy or Fidelity)
5. Aparigraha (Non-possession)
6. Sharira-Shrama (Physical labor)
7. Aswada (Control of the Palate)
8. Sarvatra Bhayavarjana (Fearlessness)
9. Sarva Dharma Samanatva (Respect for all religions)
10. Swadeshi (Using local produce)
11. Sparshabhavana (Abolishing practice of untouchability)

He lived by these principles without preaching them or making a show of doing so. “An ounce of practice is of more significance than a ton of preaching,” Bapu believed, and so it was easy for his followers to believe him and follow suit. Today, leaders thrive on preaching and confusing their adherents. They also frown upon and discourage the habit of asking questions or allowing their followers to express discontent or dissent.

When Bapu announced the next Non-Cooperation Movement, he declared that he would march from Sabarmati to Dandi, which was a distance of 341 miles, and that he would pick up a fist full of salt from the sea shore and declare that he had broken the draconian Salt Monopoly that so hurt India. The British Imperial Regime had imposed a barbaric 3500% tax on the production and consumption of domestic salt. This act of defiance was meant to help declare India to be independent; however, many senior leaders of the Indian National Congress (INC) were not convinced and were opposed to his proposal. Sardar Patel, a senior leader of the INC, was one of the people who disagreed and argued about the foolishness of the proposal. Bapu gave him a patient hearing and finally convinced Sardar, who then took responsibility for organizing the protest. It was Sardar who actually finalized the route of the march and spread the message of the Salt Satyagraha (form of nonviolence resistance). Sardar was the first Indian leader who was arrested and imprisoned, even before Bapu began the Salt March, which explains why Sardar Saheb was absent while Bapu marched to Dandi.

Another senior leader of the INC to voice his dissent, was Motilal Nehru. He wrote a twenty-two-page letter to Bapu, with a point by point explanation of why Bapu’s proposed move would fail and put his future leadership in danger; he also explained how the INC would lose the people’s trust and support. In his reply, Bapu wrote:

“Adarniya Motilalji, Kar Ke Dekhien – Respected Motilalji, please give it a try.”

Any other leader would have taken such a short reply as an insult and rejected Bapu’s leadership; however, Motilalji accepted Bapu’s decision. After Bapu had symbolically broken the Salt Law at Dandi and asked the people to follow, Motilalji declared that he would help break the Salt Law by leading his own satyagraha in the city of Allhabad.

By then, the Viceroy had ordered that all satyagrahas must be crushed by any means and its leaders must be immediately arrested, so that the movement would become leaderless and flounder. After announcing his intention to perform satyagraha, when Motilalji reached his home, the Police Commissioner was waiting for him with an arrest warrant. The last thing Motilalji did before going to prison was to send a telegram to Bapu stating the following:

“Adarniya Gandhiji, Karne se Pehle hi Dekhliya! – Respected Gandhiji, I have realized its power even before trying it out!”

This was the confidence of a true leader and such was his honesty and humility that his subordinates and contemporaries had the freedom to question his decisions and seek that he convince them before they obeyed. This also illustrates the fact that a great leader had the resolve and confidence to go it alone without becoming a hostage to the opposition of those who disagreed with him or defied his decision. As Gurudev wrote:

“Joki tor haak shunee koi na aashe tomi ekla Chalo Re…: When no one heeds your call, oh unfortunate one, walk alone.”

Bapu had the courage to tread a lonely path.  This is a hallmark of a great leader.

Bapu never aspired to become a leader. His ambition was always to serve the people and the cause to the best of his ability, and the honesty of his method was always of paramount importance, even more so than his desired objective. This sets him apart from the majority of other leaders.

Salt is a critical compound for life. Salt that dissolves in water becomes ionized, and plays a crucial role in maintaining the ionic equilibrium of the human body. It allows the sodium-potassium pump to run. Salt is also necessary for plant and animal life, but the amount of salt must be balanced here, too. When this balance is disrupted, land exposed to excessive salt becomes barren. This is a real risk for arable land. In areas where temperatures are high and there is little precipitation, over-irrigation with the intent of boosting productivity might backfire, causing over-salinization of the land. Over-salinization happens when water travelling underground from the earth’s surface encounters a layer of soil with little permeability. As such, the water starts accumulating on this layer. If the irrigation of such land continues, the level of water accumulated underground rises.

When humidity on the surface of the land decreases due to evaporation and plants consuming water, the accumulated underground water begins travelling upwards to the surface through capillary channels in the soil. This is called “capillary movement.” During this phenomenon, salt already in the soil and in the underground water is also transferred to the upper layers of the soil. Yet, this upward movement of salt in geological structures is not a main determinant of soil salinization; what is critical is the amount of salt in the irrigation water. The rate of salt in irrigation water should not exceed 1000 ppm. Even the Euphrates River, which is considered to be high-quality irrigation water, carries approximately one ton of soluble salt to one hectare (10,000 m2 or 2.47 acres) of land every year.

Salt carried by irrigation water does not directly cause over-salinization. There are mediating factors, such as the height of the underground water table, the natural hydrogeological characteristics of the land, over-irrigation, and excessive and erroneous use of fertilizers.

The evaporation of water from the earth’s surface accelerates during the hot and dry summer months. In return, the rate of salt accumulated in soil increases. When land is irrigated every year, the amount of accumulated salt in the upper layers of soil increases. This might cause fertile land to gradually become salty and barren. Such over-salinization does not happen in areas with high precipitation, since salt that exists naturally in soil in such areas is first carried to rivers and underground water sources, and then to lakes and seas.  

Over-salinization is a huge problem. Every year, approximately 10 million hectares of land are becoming barren because of over-salinization. Due to wrong irrigation methods and extremely dry seasons, over-salinization is common in many developed countries where fertile agricultural land is faced with desertification. Such a loss of fertile land means a loss of billions of dollars in these countries’ budgets.

Another reason for over-salinization, which then leads to desertification, is the destruction of forestland for use as agricultural land. With the disappearance of trees, the ecological balance of many environments has been slowly destroyed. This has been followed by improper irrigation, eventually causing over-salinization. As a result, attempts to turn forestland into agricultural land have generated vast but useless fields. Australia is losing 130 million dollars worth of agricultural land every year – and this number keeps increasing.

There are historical records documenting that vast fertile areas turned into deserts due to over-salinization. The region called Mesopotamia, surrounded by Iraq, Eastern Syria, and Southeastern Anatolia, was the cradle for many important civilizations due to its highly fertile land. Unfortunately, this region has largely gone through a mass desertification. Researchers have determined that this desertification was predominantly due to the over-salinization of the soil.

What is the solution?

Traditionally, the most important measure taken against over-salinization has been to establish a drainage system for fields in arid or semiarid climates. This system can be in the form of surface or subsurface drainage through which excess irrigation water, along with the salt in the soil, are removed via canals or pipes.

Different kinds of crops require different amounts of water. Diversifying the kinds of crops planted in the same field can also prevent desertification. Some years, crops that do not need much water should be planted to help reduce the amount of salt in the soil. Using a drip or sprinkler irrigation system can further reduce salinization.

The time of day irrigation is performed also has an effect on the soil. Irrigation should be performed after sunset, especially in hot climates, to minimize the water evaporation that triggers salinization. Another way to reduce evaporation is by planting crops that have thick vegetation during the summer months. They can shield the soil from the hot summer sun.

Increasingly, some farmers are combatting over-salinization by planting salt-tolerant crops. Grain crops – like wheat, corn, or barley – are not salt-tolerant, but plants like sugar beets, cotton, grapes, sunflowers, and alfalfa can help to decrease the amount of salt in the soil.

The final but most important step in reducing over-salinization is educating people in the agricultural sector. They should be informed about all aspects of proper irrigation. This would not only decrease over-salinization, but also maximize productivity.

If we can put all these measures into practice, we will have the chance to avoid the “white death” of much of the Earth’s soil. We have to learn to look at the ecosystem holistically, realizing that all bounties given to us, including water and salt, are only useful if they are consumed in a balanced way. Only then can we leave the world entrusted to us in a greener, more productive and livable condition for future generations.

Today, more than 1 billion people are suffering from the lack of potable water. About 2.3 billion people (41 percent of the earth’s population) live in regions with water scarcity; this number is estimated to be 3.5 billion by 2025.1

96.5 percent of the world’s water is found in seas and oceans, and the remainder is found as ice caps, brackish water, and fresh water sources (e.g. lakes, rivers, and ground waters). To overcome water shortage problems, methods such as water conservation and dam construction have been applied for several years, but they are not enough against increasing water demand and decreasing fresh water sources.2

Water is also very important for generating energy, and vice versa. The largest portion of U.S. electric production is provided by thermoelectric power generation, where steam-driven turbine generators are used to generate electricity. In 2000, thermoelectric power plants used 39 percent of all fresh water sources in the United States.3 All these reasons make the production of drinking water a worldwide issue.

Desalination

Since most of world’s water supply is found in oceans and seas, desalination is the process of removing salts and minerals from either ocean or brackish water to make it safe for human consumption and use. The most widely applied desalination processes are divided into two main categories, thermal distillation processes and membrane processes.

Desalination via thermal distillation methods, which separate liquid mixtures based on their boiling points, mainly fall into three categories: multi-stage flash (MSF), multi-effect distillation (MED), and mechanical vapor compression (MVC). Thermal distillation processes require the evaporation of water while leaving the salt in a concentrated brine. Middle Eastern countries mainly use thermal-based desalination plants to produce fresh water because of their easily accessible fossil fuel sources.2, 4

Membrane-based separations are the main choice of producing potable water in countries outside the Middle East. More than 50 percent of the newly installed desalination plants have been using reverse osmosis (RO) membrane technology (since 2001).2

Membrane separations

A membrane is an interphase between two adjacent phases acting as a selective barrier, regulating the transport of substances between the two compartments. It is a very thin film that allows passage of some types of substances while preventing the passage of other substances, depending on their sizes. Membranes used for separation technology gave rise to an interdisciplinary area including many fields of science and engineering such as chemistry, chemical engineering, material science, process engineering, environmental science, ecology, and economics.5, 6 Today, the membrane industry is impressively large. The membrane separation technology market is quite diverse and ranges from medicine to the chemical industry, and the most important markets are medical devices and water treatment. There was a $2 billion sale of synthetic membranes worldwide in 2003.6

Water purification membranes

Water treatment processes employ several types of membranes. They include microfiltration (MF), ultrafiltration (UF), nanofiltration (NF) and reverse osmosis (RO) membranes. They are designed to remove materials of increasing sizes. MF membranes have the largest pore size and typically reject large particles and various microorganisms. UF membranes have smaller pores than MF membranes and, therefore, in addition to large particles and microorganisms, they can reject bacteria and soluble macromolecules such as proteins. RO membranes are effectively nonporous and therefore exclude particles and even many low molar mass species such as salt ions, organic substances, etc.7 NF membranes are relatively new and are sometimes called “loose” RO membranes. They are porous membranes, but since the pores are ten of angstroms or less, they exhibit performance between that of RO and UF membranes.8 Of these membranes, NF and RO membranes constitute the dominant technology for desalination of water.9

2.1 Nanofiltration Membranes

Membranes for nanofiltration (NF) are usually comprised of cellulose acetate or aromatic polyamides. NF allows diffusion of organic compounds, and rejects some salts with low pressures being applied. NF itself cannot purify seawater to drinking water standards, but it is a process that can be used to produce mildly salty water, or as a water-softening technique.2, 4 When NF is coupled with RO, then it can be used to turn seawater into drinking water.10

Nanofiltration membranes usually have negative charges (e.g., carboxylate groups, sulfonate groups, etc.), and as a result, ion repulsion is a major factor in determining salt rejection. More highly charged ions, such as sulfate, are more highly rejected than monovalent ions, such as chloride, by a negatively charged nanofiltration membrane. In particular, NF membranes are used to remove divalent ions such as calcium and magnesium, which are mainly responsible for water hardness. These membranes also usually display good rejection of organic compounds with molecular weights above 200 to 500 grams.2,11,12

2.2 Reverse osmosis membranes

Osmosis is a natural process in which water molecules move across a semipermeable membrane from a lower solute concentration area to the higher solute concentration area. Water flows until a chemical potential equilibrium of water is established. When equilibrium is reached, the pressure difference between the two sides of the membrane is equal to the osmotic pressure of the solution.12

Reverse osmosis (RO) is the process of forcing water from a region of high solute concentration through a membrane to a region of low solute concentration by applying a pressure that is greater than the osmotic pressure. As a result, separation of water from the solution occurs as pure water from the high concentration side to the low concentration side. The RO process includes a feed water source, feed pre-treatment, a high-pressure pump, RO membrane modules and post-treatment steps.

RO membranes are capable of rejecting monovalent ions such as sodium and chloride, which makes the RO process a valuable method for desalination. Membranes used for RO processes have salt rejections of more than 99 percent. RO membranes do not have distinct pores, but rather rely on free volume within the polymer film.

RO membrane separations depend highly on the properties of the polymer film such as the chemical and physical structure of the membrane material. Desired RO membranes should be resistant to chemical substances and microbial organisms, stable over a long time both mechanically and structurally, and have ideal separation properties such as high water flux, high salt rejection, chlorine, and fouling (clogging of membrane pores) resistance.

Approximately one billion of six billion people in the world live in water-stressed areas, and RO membrane technology is the leading desalination technology to overcome the problem of insufficient clean water and estimated to continue its leadership in the near future.13 Scientists and engineers are extensively investigating the development of the most efficient membrane desalination technology to produce the cheapest potable water.

On the other hand, cells use membranes, though scientists do not try to further develop them, since they were already designed in a perfect manner. Cellular membranes have a phospholipid structure with embedded proteins. They control many different kinds of transportations of substances in and out of cells (e.g. sugar, drugs, ions). They are so well designed that they know which substances are helpful or harmful for the cell, and decide on the passage of substances based on that. Many researchers have tried countless times for many years to produce an equally wonderful membrane technology for making clean water. But cellular membranes, consisting of hundreds of functions in living organisms, do not form spontaneously.

REFERENCES

1) R.F. Service, Freshwater resources, desalination freshens up. Science, (2006). 313, 1088- 1090.

2) L.F. Greenlee, D.F.Lawler, B.D. Freeman, B. Marrot, P. Moulin, Reverse osmosis desalination: Water sources, technology and today’s challenges. Water Research (2009), 43, 2317-2348.

3) T.J. Feeley, T.J. Skone, G.J.Stiegel, A. McNemar, M.Nemeth, B. Schimmoller, J.T. Murphy, L. Manfredo, Water: A critical resource in the thermoelectric power industry.Energy (2008), 33, 1-11.

4) G. A. Tularam, M. Ilahee, Environmental concerns of desalinating seawater using reverse osmosis. J. Environ. Monit.(2007), 9, 805–813.

5) P. Vandezande, L. E. M. Gevers, I. F. J. Vankelecom, Solvent resistant nanofiltration: separating on a molecular level. Chem. Soc. Rev.(2008), 37, 365–405.

6) M. Ulbricht, Advanced functional polymer membranes. Polymer (2006), 47, 2217–2262.

7) R.H. Perry, D.W.Green, Eds., Perry’s Chemical Engineers’ Handbook, 7th ed., McGraw-Hill: New York, 1997.

8) Sagle, A., and B. Freeman, “Fundamentals of Membranes for Water Treatment,” in The Future of Desalination in Texas: Volume 2, Report Number 363, Texas Water Development Board, Austin, TX, pp. 137-154 (2004).

9) H.B.Park, B.D.Freeman, Z.Zhang, M.Sankir, J.E.McGrath, Highly Chlorine-Tolerant Polymers for Desalination, Angew. Chem. Int. Ed. (2008), 47, 6019-6024.

10) N. Hilal, H. Al-Zoubi, N. A. Darwish, A. W. Mohammad, M. Abu Arabi, A comprehensive review of nanofiltration membranes: Treatment, pretreatment, modelling, and atomic force microscopy, Desalination (2004), 170, 281-308.

11) A. Gorenflo, D. Velazquez-Padron, F.H. Frimmel, Nanofiltration of a German groundwater of high hardness and NOM content: performance and costs. Desalination (2002), 151, 253-265.

12) M.E.Williams, A Brief Review of Reverse Osmosis Membrane Technology,EET Corporation and Williams Engineering Services Company, Inc., Harriman, TN, 2003.

13) K. P. Lee, T. C. Arnot, D. Mattia, A Review of Reverse Osmosis Membrane Materials for Desalination – Development to Date and Future Potential. J. Membr. Sci. 370 (2011) 1-22.

Dear Peter, in your body, which is built like a well-functioning factory, I am the most essential sanitary device. As the heart pumps blood to take food and oxygen to all your organs, you obtain the energy you need. But do you ever think about the disposal after so splendid activities are carried out in your body? If you burn a stove, you need to dispose of the smoke and the ashes if you want to keep it working. Likewise, as you burn your calorie intake, you dispose of the smoke (carbon dioxide) with your lungs and the waste with nitrate-poisonous after a certain level of intensity-thanks to my quietly and perfectly working filters. That is, I am an organ which saves your life by removing the poisonous substances in your blood. I do not only filter your blood, but also play a role at controlling the balances of the sensitive levels of water, sugar, amino acids and different minerals in your body. In short, I am a tiny but strategic laboratory.

The acid-base balance in your body and the amount of water and different salts are significant values which concern all of your bodily activities. When their balance is upset, different troubles arise in different units of your bodily mechanism. I am such a blessing, which works so sensitively to adjust the levels of water and mineral salts in your body while you don’t even realize it.

A watery environment is needed for the thousands of biochemical activities taking place in your body. In addition, activities like the contracting of the muscles and transmission of electrical stimuli between your neurons are realized with the presence of a pinch of mineral salt you don’t even give a thought about. Sometimes you sweat due to running or hot weather. The white stains on your shirt are the salts you lose after the water evaporates. When you suffer from diarrhea, you lose salt again, for the salt in the nutrients are thrown out without being absorbed. Especially when little children are concerned, this loss is of vital importance. The transfer between the blood and the liquid in the tissues is mainly realized through the concentration differences which are kept in a certain balance. If your body holds too much water, your tissues swell. You particularly feel it when you press your finger over the flesh near your shins.

Dear Peter, I will not list all of my duties in detail in order not to confuse you. However, let me tell you one more. Since not everyone knows this duty of mine, they just see me as an organ of liquid disposal. But I also take part in controlling the blood production! Surprised? Well, I also have the duty of secreting the hormone which stimulates blood production in the bones. I must always stay alert and maintain this balance in the best way; if you start losing blood, for instance, I must increase the hormone and accelerate blood production.

Yes Peter, I’ve told you about a few of my basic duties, but haven’t told you about how wonderfully designed I am. I am a bean-shaped organ and a single kidney like me weighs 130-160 grams on average. We are approximately 10 grams lighter in female bodies. I am surrounded by a soft but protective membrane. I need 35 grams of daily oxygen supply to survive and I use 13 % of your total body energy.

As an army is made up of individual soldiers, I am like a complex army, and a single soldier of mine is called a “nephron,” which does the real job. Thus, you can see me as a body of nephrons. Millions of these nephrons are brought together to make up one kidney.

A single nephron is a thin tubular structure with closed ends, and its length is about 3-4 cm. So the total length of my nephrons is about 50 km. The cup-like sac at the beginning of a nephron is named the “Bowman’s capsule.” The main artery bringing blood to the kidneys branch into smaller units, and one road leads to every nephron. The knot of capillaries (glomerulus) inside this double-walled capsule is more complicated than any road map you might have seen. The total length of the capillaries is nearly 25 km. The unwelcome substances in the blood are passed to the capsule thanks to blood pressure, and they proceed through the tubule. The total surface area of my tubules is about 20 m2. Within five minutes the whole of your blood passes through us. That is to say, an average of 1.2 liters of blood per minute, and 1800 liters a day are filtered by my nephrons, leaving the toxic substances in me. As this amount of blood (nearly 400 times the normal amount in your body) pass through my tubules and return to the veins they leave behind an average of 180 liters of liquid in me. In this case, you could be supposed to throw out 180 liters of urine a day. However, if you really did that, you would neither be able to find a sufficient supply of water nor salt. Fortunately, Providence granted you the mechanism to absorb back nearly 178.5 liters of this filtered substance. This way, the thickened urine throws out the toxic nitrogen-containing byproducts together with a little amount of water. Therefore, I give you back the substances you need with an amount of 1.5 liters of liquid disposal a day. This reabsorbing is realized in what you call the Henle loop. The cells in the walls of my tubules have neither intellect, nor consciousness, nor any knowledge of physiology; in spite of this, they work as if they were perfectly aware of their duty to adjust the amounts and types the substances to be kept or released. To give you an idea, you can think about the huge dialysis machines your engineers design to fulfill the job my tiny tubules do. You decide which one of us is the perfect work of engineering.

A rich network of veins surround the Heinle loop and the reabsorbed substances are released into the bloodstream. The drops to be disposed of are collected and then passed to your bladder. When the liquid in your bladder amounts to a certain value it tightens the bladder walls. The muscles blocking the way out give way and the urine is disposed of. However, know that the bladder has the capacity to expand as large as 1.5 liters when you cannot find the proper time and place.

Peter, most people take for granted the blessings they enjoy. If you visit the nephrology service in a hospital and talk to the patients waiting to be dialyzed, you understand what I mean better. Do not forget that many people who suffer from kidney failure need that huge machine to filter the whole of their blood and they pray for a kidney suitable for transplantation to be found at once.

Incidentally, thinking of chronic kidney failure recalled various reasons which ruin me: long lasting infections, long-term use of certain medicine, different chemicals like ethylene and mercury, heavy loss of blood, high blood pressure, serious burns, and wrong blood transfers etc. In such cases I can receive irreparable damage.

Another issue which troubles me is the formation of kidney stones. The stones which form owing to failures in different metabolic processes really hurt. When excessive decrease of liquids or increases of salts in the body upset my sensitive balance, some dissolved substances remain, begin to collect, and form stones. These stones hinder urine flow and might cause infections. You may drink water abundantly to prevent these stones. Most importantly do not wait too much before going to the toilet. If you excuse me, I also strongly recommend you to urinate in sitting position; this helps emptying your bladder completely and reduces the risk of kidney stones.

I do my job properly until I lose 90 % of my working capacity. When a considerable part of me loses its capacity, the remaining good part boosts its activity to make up for the loss. When one of our twins are taken out with an operation, the other one does not complain at all; it grows a bit bigger and keeps working.

As the nature of honey depends on the nectars bees collect, the ingredients of the urine I produce depend on what’s in your body. Therefore, a urine analysis tells much in the case of illness. For example, I normally do not release valuable substances like glucose and protein in your blood into the urine, but return them to the bloodstream. As my friends cannot fulfill this function in diabetic patients, their urine analyses reveal glucose. As for medicines, I throw them out right away since they are alien substances to me.

Peter! You are young and healthy but be careful and do not get cold around the waist, otherwise I might trouble you. There’s a lot to tell you Peter, but I do not want to confuse you. Like any other organ, I do not like being taken for granted and I just wish for you to appreciate what a blessing I am. Let me note that my perfect cooperation with the rest of your body is another wonder in itself. Anyway, the urea in your blood is increasing, so I must go help my twin now. Goodbye Peter!

Irfan Yilmaz is a professor of biology at Dokuz Eylul University, Izmir.

The world hypertension statistics

Almost a quarter (26 percent) of the world’s adult population suffers from high blood pressure. It is estimated that this number will reach 29 percent by the year 2025. These average statistics based on the adult population of the world includes people of various age groups and from different countries. The risk of hypertension increases with age. While the figure for 20–29 year old males is 13 percent, it increases to 40 percent between the ages of 50–59, and reaches over 60 percent after the age of seventy. Although there are slight variations in women, many of the figures are almost the same (Figure 1).

These figures are quite striking; one out of every two people over the age of sixty suffers from high blood pressure. As for those in their seventies, the figures have already reached almost 70 percent and are expected to increase even further as this group ages. Many diseases in the adult population remain at 1–2 percent; therefore, these figures convey just how common and serious hypertension really is.

The regional distribution of hypertension figures

In contrast with the estimated numbers given above, the figures for hypertension in the different regions present significant variations. Statistically, the number of hypertension cases increases according to the welfare status of the society. In economically developed countries, 37 percent of the adult population has high blood pressure, which is a considerably elevated number in comparison with the world average of 26 percent. Furthermore, 70 percent of the males and 80 percent of the females over the age of seventy living in economically developed countries suffer from high blood pressure. However, in economically underdeveloped countries, the number of hypertension cases is very low.

The hypertension rates in China and India are well below the world averages, with males at 17 percent and females at just 14 percent (Figure 2). In some societies, for example in the Amazon’s catchment areas, the Yanomami Red-Indians, and tribes in the highlands of Papua New Guinea, few cases of hypertension can be found, and blood pressure among these groups does not tend to increase with age.

The reasons for the increase in hypertension

There is a genetic disposition to develop hypertension. The recent studies reveal that high calorie foods, a high level of salt intake, the lack of physical activity, and alcohol intake all play a significant role in the increase of hypertension. By examining these reasons alone, we clearly see how important the prohibition of alcohol is and the Prophet’s words of wisdom advising us to eat less bear on our lives and prosperity in both this world and the hereafter.

Excess of body fat (obesity)

Another recent health phenomenon is the huge increase in people suffering from obesity, mainly due to excessive eating and the lack of exercise. Studies related to disease outbreaks (epidemiological studies) show that obesity is clearly associated with hypertension. These studies also reveal a significant increase in people suffering from both obesity and hypertension. According to these studies, 78 percent of the male and 65 percent of the female cases of hypertension are connected to obesity. Similar studies carried out in various countries confirm that a large number of people with high blood pressure were overweight and that losing weight substantially reduced their blood pressure levels. In fact, the blood pressure in some was reduced by losing weight alone, without the need of any medication.

Many studies also evaluated the connection between obesity and hypertension by measuring the level of the leptin, the hormone that controls the appetite, in the body. High levels of leptin induce stimulation in the sympathetic nervous system and shrink the veins (causing an increase in blood pressure). Another reason for the increase in the activity of the sympathetic nervous system of overweight people is the rise in insulin levels, which in most people can be controlled by diet. Finally, the kidneys of overweight people retain greater levels of salt and water, which causes an increase in blood pressure. These conditions, which on many occasions can prove to be very serious, are in fact contrary to the intended physical state of human creation, as the Prophet Muhammad, peace be upon him, declared in these words of warning: “What I fear most for my followers is a large stomach, excessive sleep, idleness, and the lack of certainty (in faith).”

Excessive salt and alcohol

Evidence from both experiments on animals and clinical studies proves that the excessive intake of salt increases blood pressure. In animal experiments, a high intake of salt in the diet of rats showed a rise in blood pressure, which resulted in strokes. In another experiment, more than 0.50 ounces of salt was added to the diet of several chimpanzees for a period of twenty months. The studies showed an increase of 33 mmHg in the systolic blood pressure and 10 mmHg in the diastolic blood pressure, and when the salt was removed from the diet, the chimpanzees’ blood pressure returned to normal levels. Indeed, salt is an important nutrient for the human body. Sodium, potassium, and calcium salts are essential for all nerve cell activity, for muscle movement, and for the osmotic balance of body fluids. Medical science of today stresses the importance of natural foods, and bread, an important part of our diet, meets the body’s daily requirement of sodium. Thus adding salt to our food and exhausting the kidneys is not necessary.

Various clinical studies on humans have shown that excessive salt in the diet increases blood pressure levels. Salt has been used in the human diet for the past 8000 years, since the beginning of agriculture and animal farming. A human’s normal requirement of sodium is 8–10 mmol/per day. However, in economically developed countries, the daily sodium intake of most people has risen to 140–150 mmol per day (8–9 grams), almost 14–15 times more than the normal physiological requirement. In a study carried out on the subject, 10,000 blood pressure sufferers in 32 countries were closely monitored, and the results showed that as the salt intake was reduced, blood pressure levels dropped. In another study, 24 hour urine samples were analyzed, and here too, a low sodium diet showed a decline in blood pressure.

One of the many health risks of alcohol is its serious affect on blood pressure. Clinical studies have proved that the excessive intake of alcohol causes high blood pressure. The frequent cases of high blood pressure in societies of the former socialist countries and economically developed countries of the present are mainly connected to the excessive intake of alcohol.

As a result, the number of high blood pressure cases in the world has exceeded that of contagious diseases, and this is closely connected to our eating and drinking habits. If humans continue to excessively eat and drink as they are at the present, most people will be suffering from high blood pressure in the very near future.

Original Article: Wang, M. et al., PNAS (published online before print on March 1, 2010).

Periodic injections of insulin to manage blood sugar levels is critical for the treatment of diabetes patients. It requires continuous monitoring of glucose levels in the blood and multiple injections of insulin in order to mimic the natural balance of sugar-insulin levels in the human body. Yet, it is often difficult to maintain this extremely sensitive hormone balance without major side effects. These complications include blindness, leg ulcers and amputations, heart vessels problems, renal insufficiency, stroke, and nerve damage in the legs and arms. Moreover, the long-term use of insulin causes the increase of body fat and bad cholesterol. A new research study on non-obese diabetic mice shows that adding leptin- a hormone responsible for appetite control- to the insulin therapy results in better control of blood sugar levels and decreases the bad cholesterol and body fat of Type 1 diabetic mice. This is promising, as it could reduce heart and circulatory complications of Type 1 diabetes. However, the leptin therapy may not have an effect on type 2 diabetes, adult type, because in this type patients already have high levels of leptin. However, it has to be shown that leptin therapy is safe and effective on humans as well. There is a long way to go before we can use leptin in practical areas.

2- Re-teaching speech with music

Original Source: Schlaug G, Annual Meeting of the American Association for the Advancement of Science (AAAS), San Diego (2010).

Nearly 800,000 people in the U.S. are faced with strokes each year, and a quarter of those are affected by aphasia, a deficit in language. Using a new melodic intonation therapy, therapists treat patients by teaching them how to sing words and phrases consistent with the underlying melody of speech. As a result, the patients continue to speak in a more “sing-songy” way than a person with normal speech patterns, according to Dr. Schlaug, professor of neurology at Harvard Medical School. After 15 weeks, 1.5 hour-long daily sessions with a therapist, the patients gradually learn to piece the sung words together into organized speech. There are two separate brain networks associated with vocal output, with the one in the left hemisphere being engaged with speech and the other one in the right hemisphere strongly responding to music and melody. For the stroke patients that had damage to the left hemisphere, this therapy may help to train similar areas on the right hemisphere, helping them to initiate a speech region in the right hemisphere. Singing facilitates necessary engagement to the right hemisphere. Images of patients’ brains before and after the therapy reveal striking structural and functional changes in the right hemisphere. This study also reminds us of the brilliance of musical therapies employed in early hospitals in the Islamic world.

3- Renewable Jet-Fuels

Original Article: Bond, J.Q. et al., Science 327, 1110 (2010).

The global need for sustainable energy resources is ever increasing and the use of renewable fuels offer promising solutions. Among others, biofuels are especially important due to the presence of direct conversion routes from plant-based waste materials to conventional liquid fuels. However, high synthesis costs and complex processing steps are major hurdles to overcome before putting biofuels forward as economically viable alternatives to fossil fuels. Researchers are therefore trying to come up with more efficient methods -and one group, from the University of Wisconsin appears to have done so. Unlike commonly utilized routes involving microorganisms, they use a novel and environmentally-friendly chemical process which is easier to control and maintain. By using an inexpensive catalyst, they convert the majority of the wasted biomass to gaseous butene and carbon dioxide, with a water-based solution of gamma valerolactone as the intermediate chemical. The butene gas is then easily transformed to high-energy transportation fuels such as gasoline and jet fuel. As an added advantage, the stream of carbon dioxide can be efficiently captured, preventing the atmospheric release of this major greenhouse gas. Under optimized conditions, the system can operate uninterrupted for 90 hours with an overall efficiency of over 75%. Successful work like this will help make biofuels cheaper for mass production, pending the meticulous analysis of its economics.

4- Salt controversy: How much is too much?

Original Article: Bibbins-Domingo, K. et al., NEJM 362, 590 (2010).

Modern humans suffer from high rates of obesity (for instance, 64% of Americans are classified as either overweight or obese) and cardiovascular diseases, with the latter being the no.1 cause of all deaths. A recent study conducted by researchers at the University of California at San Francisco suggests that reducing dietary salt by half a teaspoon a day (~ 3g) would lower the annual number of new coronary heart disease, stroke and myocardial infarction cases. Strikingly, such a modest decrease is expected to decrease deaths from any cause by 44,000 to 92,000. According to the National Salt Reduction Initiative, Americans eat at least twice as much salt as they need where 80 percent of the salt in the American diet comes from processed or restaurant-prepared foods. However, eating too much salt is not a problem for people with healthy kidneys since kidneys are designed to flush out unneeded salt. However, when people have a high salt diet, then their kidneys are over-worked. Taking into account that modest salt reduction in one’s diet won’t likely cause harm and taste buds will likely adapt to this minor change effortlessly, it seems wise to refrain from using too much salt. This would trigger bigger health benefits ranging from not overworking the kidneys to reducing the risk of deadly diseases.

5- Why don’t we get thirsty during sleep?

Original Article: Trudel, E. & Bourque, C.W., Nature Neuroscience (published online before print on February 28, 2010).

In mammals, the “internal-standard-time” is kept by a particular subset of brain cells known as “clock-neurons” which display high activity during the day and low activity during the night. A group of scientists recently reported that the clock-neurons also function as a dimmer for water regulation, allowing bodily water content to be controlled by the body. A specialized group of cells, called osmo-sensory-neurons, detect and regulate water levels in the body, through balancing the water intake via thirst and loss via urine production. When water levels are low, the sensory-neurons communicate with some hormone-releasing cells which instruct the body to store water by ceasing urine production. By using isolated brain slices from rats, the researchers showed that the clock-neurons – when active – interfere with the communication between sensory-neurons and hormone-releasing-cells to suppress the water-storage-hormone release. In contrast, when the clock-cells are inactive (i.e., ‘sleep period’) the communication is restored, resulting in an increase of hormone levels to enable water-storage. Such regulation is the reason why we are not much disturbed during sleep by neither frequent trips to the bathroom, nor excessive thirst (that would both impair the sleep quality), and reminds us the verse from the Holy Qur’an: “..and He has made the night for rest…” (Chapter Al-Anaam, 96).

6- A passage to vegetative state through fMRI

Original Article: Monti MM et al., NEJM 362, 579 (2010).

Consciousness in medicine is defined as the patient’s alertness and responsiveness to the outside world. If a patient does not respond to external stimuli, his/her medical state is considered a “vegetative state”. Researchers from Cambridge, England performed functional magnetic resonance imaging (fMRI) experiments on 54 patients who had been previously classified as either “vegetative” or “minimally conscious”. Interestingly, 5 of 54 patients exhibited distinct neuronal activities in the corresponding regions of their brains, when they are given imaginary motor and spatial tasks. For the motor task, patients are asked to imagine playing a tennis game. For the spatial task, patients are asked to imagine navigating through a familiar location. A 22 year-old man who had been in coma for five months was further evaluated by being subjected to a simple set of yes-or-no questions such as “Do you have any brothers?” and was instructed to answer these questions using one type of mental imagery, that is a motor imagery for “Yes” and a spatial imagery for “No”. He answered 5 out of 6 questions correctly. This is the first evidence that through fMRI approach one can reach the residual cognitive activity in vegetative patients and establish functional communication, raising question marks about our current handling of these so-called vegetative patients.

The Aral crisis is the best example of an ecological problem with serious social and economic consequences, directly or indirectly connected with all the states of Central Asia. The critical situation caused by the Aral Sea drying off was the result of agrarian economy tendency on the basis of irrigated agriculture development and volume growth of irrevocable water consumption for irrigation.

The Aral Sea was once the fourth biggest inland sea of the world, located between Kazakhstan and Uzbekistan (formerly in the Soviet Union). It moderated the inland climate for many centuries through water evaporation, which gave life to the surrounding deserts of Central Asia. The Aral Sea also was inhabited by more than one hundred fish species and supported productive fishing industries. Some fifty years ago the Aral Sea was surrounded by prosperous fishing towns like Moynaq.

The water area of Aral has periodically expanded and contracted in the course of history. These changes have affected the climate and the state of the region and led to important migrations in history. In spite of the massive glacier melting in the North and South Pole because of global warming, which would be expected to increase the level of inland waters, the Aral is rapidly losing its water. Because of poor environmental planning and the negligence of humans, the Aral Sea is now dying and according to the experts it will disappear in less than ten years.

The Aral Sea started to dry off in the early twentieth century. In 1918 Lenin decided that the only two water supplies of the Aral, the River Amu and the River Syr should be diverted for irrigation of the desert to increase land for agriculture. The idea was to boost agriculture, and this worked for a short period of time. The Soviets or Uzbekistan became the world’s largest exporter of cotton, which they referred to as white gold. The area of irrigated lands increased from 3 million hectares to 8 million. The population of the region increased from 7 million (1940) to 50 million (2000). At the initial stage of this project which seemed a brilliant idea at first sight, the irrigated land built up the economy of the Central Asian Soviet States and produced millions of jobs. Although, the result of the project was brief joy and success, the price of poor planning turned out to be by far too high.

First of all, the government had decided to grow cotton in a desert terrain. Cotton farming requires lots of water, which would not occur naturally in the desert. They also increased the production of other crops like water melons, cereal, and rice. Diverting the rivers cut the supply to the Aral Sea, and due to evaporation, it began to shrink. The first irrigation canals were initiated in the 1930s; however, these canals were poorly built, extremely inefficient, and wasted more than 50% of the water. Even today in Uzbekistan only 12% of canals are leakproof. The level of the sea has gone down constantly ever since; in the 1960s it became obvious that the sea level was falling; there was an average 20cm fall per year until the 1970s, when the fall became 50–60cm a year, and now it is 80–90cm a year. Especially in the period of 1960–1980 the diversion of water doubled, which reflected on cotton cropping as much as on the decreasing sea level.

The loss of water exposed the salty sea bed in the Southern Aral. Dust storms spread salty soil into the irrigated areas. Farmers tried to fight against salt contamination by flushing the soil with large volumes of water, which makes its way back to the sea. In addition, farmers used high levels of pesticides and fertilizers to increase the efficiency of crop production. However, these chemicals leave traces of nitrogen and other salts in high amounts in the soil. By flushing the soil with water to reduce salt levels, pesticides and fertilizers were also washed out and further polluted the sea.

Even more unsettling is that the Soviet government knew that they would lose the Aral Sea; in 1968 an expert said “it is obvious to everyone that the evaporation of the Aral Sea is inevitable”; and they also knew that fishing would be hit but the sad fact is that the government saw the Aral as an “error of nature.” The consequences of cutting the Aral’s water supplies and the irrigation of the desert were the beginnings of serious ecological and social problems in the 1960s. The sea was lost to fishing and transportation. This business of “killing nature” has not only affected the people living in the immediate vicinity of the sea. They did lose their jobs and they had to restart their lives, but the whole environment was affected too. Loss of water caused an increase in the overall salinity of the sea. Besides that, the bed of the sea, which held toxic chemicals and pesticides, was now revealed. The local drinking water is hence contaminated. The Aral was once the habitat of more than 120 unique species; now it has only thirty-eight. Being a heat reservoir, it had a cooling effect on the environment, but now the temperature can go above 120 degrees, winters still being harsh. Poisonous dust and salt storms take their toll. Infant mortality, tuberculosis, cancer and lung disease are thirty times higher than normal levels because the water is contaminated by fertilizers, pesticides and salt.

Currently the sea has lost more than 60% of its surface area and more than 80% of its volume; as of 2004 the salinity is 45g/l, normal value being 10g/l. While shrinking, it has split into two lakes, the North and South Aral Seas, now 95 miles away from Moynaq, leaving vast areas of salty desert behind. A BBC reporter said, “What appears to be snow on the seabed is really salt. The winds blow this as far as the Himalayas. The children of Moynaq have made a playground out of the wrecks of ships which might have provided food and a future for them.” The drying out of the Aral may lead to even more serious consequences in future if measures are not taken soon. First, increased temperatures may lead to the degradation of mountain glaciers. This could be highly dangerous for the region because the glaciers feed the River Amu and River Syr, and they are the only remaining storage for the supply of fresh water and moisture. Second, the Aral’s sea bed emits massive amounts of salt and dust into the atmosphere. Polluted air is carried over the area by a powerful air stream. Traces of pesticides and salt from the Aral region are now found in the blood of penguins in Antarctica. Moreover, the pollution affects areas thousands of miles away, such as the glaciers of Greenland and the forests of Norway.

In 2003 Kazakhstan decided to make this split permanent by building a dam (Kokaral Dike) between the northern and southern parts. The restoration effort focuses on the Northern Aral which is small and less polluted. This seals the fate of the Southern Aral, and is synonymous with its vanishing. The northern water supply, the River Syr has been restored and diverted back into the sea. Although it will not be the same again for sure, planners think that fishing will be rescued and the North Aral Sea will stabilize the climate by smoothing out the high and low temperature extremes and increasing rainfall. The efforts have helped to lower the salinity level which has even allowed the reintroduction of fishing in this area. The result is surprisingly encouraging. There are other proposals like diverting the Volga, Ob, and Irtysh rivers but this would be very costly and could cause yet another catastrophe.

This story has everything in it. Humans who disregard the ecosystem takes the gift in nature for granted. As we can see, however, nature is not infinite and it is breakable. Hundreds of years may pass until the region completely recovers. The magnitude of the disaster is comparable in scope to those of Hiroshima and Nagasaki, and might be even worse. This is a great example of short-term greed and ill-guided economic moves disregarding the whole ecosystem and bringing consequences which have to be dealt with in the long run. In this particular case, there could have been other ways to avoid the damaging decision to cut the water supply of the lake fully, such as relying on a different type of crop which requires less water, or making more efficient use of water, and so on.

This disaster is a single example of the type of global catastrophe we might encounter again in the future. This being so it should be kept in mind when we think of our future. A lot of the damage humankind causes might still be avoided if we act firmly and quickly. This is not just necessary for our grandchildren or our children but even for our own generation since the consequences of ecological destruction are being seen more rapidly now. The widely known global warming cannot be belittled, and, as the Aral Sea example might have taught us, the consequences can be terrible. It is likely that more such unpredicted events will afflict us. Added to this, there are water pollution, deforestation, and the destruction of wet-lands. Every day we hear or read about these consequences of negligence and greed. But these geographical features are all in perfect harmony, and we cannot rudely and unthinkingly destroy them. As Lester Brown comments, “Previous generations have always been anxious about the future, but we are the first who decide if the Earth inherited by our children will be inhabited.”

Timur Ceylan is an expert engineer at AMD Technologies, San Francisco.

References

• National report: “On the environment state and use of natural resources in the Republic of Uzbekistan.” State Committee on Nature Protection of Uzbekistan. Tashkent, 1998.
• K.Isentaev. “Geological structure and perspectives of oil and gas reserves of the Aral Sea.” Workshop report. Almaty, 1997.
• Ministerial conference of Central Asia. “Assessment of the environment.” Aarhus, Denmark, 1998.
• J. Mahambetova. Non-government union. “Aral tenizi.” Aralsk, 1999.

All methods of estimating “time” use the same principle: measuring the velocity of natural processes that show continuity over time. One of the most advanced methods of chronometry today is to use the velocity of quartz crystal vibrations when exposed to an electric field. The wristwatches we wear in our daily life are well-known applications of this method. Another method of measuring time is to measure the rate of decay of radioactive elements.

However, having a process with which to measure is not sufficient. To measure the time that has passed correctly there are three requirements that need to be satisfied. First of all, it is essential that the process is stable and immutable, even during the period before we were able to observe it. Secondly, the beginning state should be known. For example, the length of a candle before being lighted or the amount of water in a cup before being boiled should be known. Thirdly, the process should not be influenced by any outer effects.

Today, all these three factors have been applied in studies of measuring time. But, when the question comes down to Geochronometry (Measurement of geologic time, as through isotopic radioactive decay), they are somehow more difficult to apply. Since the selected process starts before the beginning of history, we do not have methods to observe the process directly or to make sure that these three requirements were met then as today. And this is where the problem starts.

For instance, we can use the salinity of the oceans as a means of measuring the age of the Earth (This method was developed in 1898 by Irish geologist John Joly). This is a promising method, because it is assumed that the amount of salt in the water of the ocean was originally zero, and that salt was propelled by rainwater and rivers from the soil. The encouraging fact about this method is that the amount of salt brought to the oceans by rainwater and rivers is constant (approximately 540 million tons of salt annually). Today, the average density of salt in oceans is nearly 32 grams per liter. By using this ratio, we can calculate the total amount of salt in the oceans as being approximately 50 quadrillion tons. When we divide this number by the amount of salt propelled annually, we can find the age of the Earth in years.

Joly calculated this as being 100 million years using this method. However, considering the study in light of the three requirements mentioned above, the shortcomings of this method are obvious. Firstly, we cannot really be sure that the amount of salt propelled was static in the geological past. There is good reason to think that the climate and annual rainfall might have been significantly different in the past. Ice ages, great droughts, excessive rains, and the undeterminable effects of these factors may have all played a part. Secondly, it is impossible to be sure that the oceans were salt-free at the beginning. They may have contained some salt (recent research carried out in the Atlantic demonstrates the possibility that salt could have penetrated through to the oceans from the magma layer). Thirdly, some external influences may have affected this so-called stable process. There is a large and self-replicating circulation of salt in the atmosphere. New clues lead us to think that the amount of salt in oceans today is stable. As soon as the salt propelled by rivers accumulates, it evaporates at the same speed. While a huge amount of salt evaporates in biological processes, a greater amount penetrates to the depths of the seas.

The Uranium-Lead Method

All the methods that estimate the age of the Earth suffer from the same shortcomings to some degree. The radiometric age estimation method, which can estimate age up to 4.5 million years, consists of measuring radioactive elements that have a long half-life and that maintain their radioactivity over a long period. These elements are uranium and thorium, which decay into helium and lead, rubidium, which decays into strontium, and potassium, which decays into argon. However, as we will see, the Uranium-Lead method has been given great importance, in particular by evolutionists.

The basic principle involved is that radioactive uranium 238, uranium 235, and thorium 232 atoms eventually decay into miscellaneous lead atoms, without any trigger (in addition, uranium 238 decays into helium gas).

Interestingly, the decay rate of each element is definite. Uranium and thorium atoms periodically radiate alpha particles. However, it is unpredictable which atom will decay when. But in any substantial mass of the mineral there will be many billions of atom, and with very large numbers of events the “law of large numbers” operates to produce a statistically predictable result.

The significant part of this theory is that radiogenic lead 206, which is not radioactive and which is decayed from radioactive uranium 238, is found in rocks. However, it differs chemically from lead 204, which is neither radioactive nor radiogenic. To estimate the age of a rock, it is split and the amounts of radioactive uranium and radiogenic lead found are measured. Since the decay rate is known, it is possible to calculate the age of the rock.

The half-life of uranium 238 – one of the isotopes used – is calculated as being 4.5 million years. This means that half of any amount of uranium 238 will decay into lead 206 in 4.5 million years. For instance, if an investigation shows that half of a rock consists of uranium 238, and the other half consists of lead 206, which is the final product of uranium 238, the rock is then 4.5 million years old (although this number has not been calculated by a direct measurement, it is an average age for the crust of the Earth).

If radiogenic lead (lead 206 that has decayed from uranium 238, lead 207 that has decayed from uranium 235, and lead 208 that has decayed from thorium 232) are truly the products of radioactive decay then it is assumed that these rocks contained no radiogenic lead at the very start of the process of rock formation. This is a reliable starting point for calculations. Simi-larly, it is assumed that radiogenic lead cannot penetrate rocks in any other way, and conse-quently there is no process that can affect the decay process. However, when examined carefully, we can see that this is not really the case. A new process in which “natural” lead transforms into a form that cannot be distinguished from radiogenic lead was discovered by experimentation (Cook, 1966). This transformation occurs by natural lead taking hold of free neutrons. These neutrons are atoms that have the energy to transform natural lead into radiogenic lead. Then what is the source of the free neutrons?

The Origin of Lead 208

The source of lead 208 lies in a radioactive mine bed where natural fission (the division of the nucleus of uranium) has taken place. (A uranium bed were such natural fission occurs has been found in The Gabon.) In this uranium bed, while some uranium 238 atoms decay into lead 206, others divide by natural fission and produce neutrons. These neutrons simultaneously transform natural lead (lead 204) and radiogenic lead (lead 206) to lead 208 isotopes in a gradual process. This isotope cannot be distinguished experimentally from lead 208, a product of the alpha decay of thorium 232. Therefore, the lead 208 isotope emerges from two different sources. However, Darwinists state that all lead 208 isotopes detected are the product of thorium 232, which would mean that there is a large amount of radiogenic lead, and subsequently that the process continues for a long time. Significantly, this is a mechanism that would tip our measurements in favor of an “old” Earth.

In the neutron capture process, the isotopic values of lead would be systematically changed: lead 206 would be converted into lead 207, and lead 207 into lead 208 by taking on a single neutron. What is interesting is that lead 208 makes up more than half of the lead in the bed. According to Darwinists, this means that there was a large amount of naturally occurring thorium 232 in that bed, which later changed into lead 208. However, Melvin Cook, who carried out research in uranium beds in Zaire and Canada (the largest uranium beds in the world) states that, although the beds do not contain thorium 232, they do contain a large amount of lead 208. This can only mean that lead 208 results from lead 207 taking hold of a neutron. He also states that all radiogenic lead can be accounted for in this way.

Other people have tried to denigrate Cook, a man who believed in “creation”, and his studies. Among these is the geologist Brent Dalrymple from the U.S. Geological Survey. Neither Dalrymple, who argued that the level of free neutrons were too low to make any significant difference in the number of lead 208 as lead isotopes in the beds, nor could anyone else provide a satisfactory explanation to why, although there was no thorium 232 in the beds, lead 208 was found in huge amounts. Uranium decay not only degrades the most important criteria of a reliable geocronometry method, but it also degrades the criteria of the process, i.e that it is stable, immutable, and not intervened with. Uranium, which naturally emerges as an oxide rather than a metal, and which shows a very high capacity of dissolving in water because of this property, ekes out of its original bed with water. Its effect in age estimation is unpredictable, as while some parts of the bed are poor in uranium, other parts are rich.

The Helium Problem

Beside lead, one of the final products produced in the decay of uranium 238 is radiogenic helium, the atomic weight of which is 4. It is thought that a significant proportion of helium in the atmosphere is radiogenic helium that emerges in the decay process that has continued throughout history. If the uranium-lead age estimation method is reliable, then the amount of helium in the atmosphere must suggest an age in agreement to the age provided by radiogenic lead estimation. However, the ages acquired from the two methods are significantly different. If the Earth were 4.6 billion years old, then there would be roughly 100 trillion tons of radiogenic helium 4 in the atmosphere. Actually, there are only around 3.5 billion tons present – several thousand times less than there should be (0.035 % to be precise).

Writing in Nature on the “mystery” of the Earth’s missing radiogenic helium, Melvin Cook says: “…Hence more than 1,020 grams of helium should have passed into the atmosphere since the ‘beginning.’ Because the atmosphere contains only 3.5×1,015 grams of helium 4, it must also have passed out through the exosphere, and that the present rate of loss through the atmosphere balances the rate of exudation from the lithosphere.”

Cook says that uniformitarian geologists have attempted to explain this discrepancy by assuming that the other 99.96 percent has escaped from Earth’s gravitational field into space – but this process has not been observed. In 1984, Dalrymple argued a mechanism that can explain this difference and that provides a reply to Cook’s proposal: “Banks and Holzer have shown that the polar wind can account for an escape of 2 to 4 million ions/cm2 per second of helium 4, which is nearly identical to the estimated production flux of 2.51.5 million atoms/cm2 per second.”

There are two things that make Banks and Holzer’s findings unsuitable for the purposes to which Dalrymple tries to fit them. First of all, if the Earth really is 4.5 billion years old, then its atmosphere would have to lose helium at a rate somewhere around 1,016 atoms/cm2 per second, or some ten orders of magnitude faster than Dalrymple’s figure, to account for the missing helium.

Secondly, the numbers Dalrymple used were calculated 30 years ago. In that period, most scientists believed that the Earth moved in empty space (i.e., that nothing encapsulated the Earth but emptiness), and that hydrogen and helium atoms escaped to emptiness. New studies have shown that, rather than losing helium, the atmosphere gains a significant amount of helium. Since the Earth rotates around the Sun, it does not move in empty space, it moves in the atmosphere of the Sun, which is made up of mainly helium and hydrogen that have emerged from the nuclear processes that occur on the Sun. According to research, the Earth gains helium in this way as well.

In his book (1987) Gaia: A New Look at Life on Earth, space scientist James Lovelock writes: “The outermost layer of the air, so thin as to contain only a few hundred atoms per cubic centimeter, the exosphere, can be thought of as merging into the equally thin outer atmosphere of the Sun. It used to be assumed that the escape of hydrogen atoms from the exosphere gave the Earth its oxygen atmosphere. Not only do we now doubt that this process is on a sufficient scale to account for oxygen, but we rather suspect that the loss of hydrogen atoms is offset or even counterbalanced by the flux of hydrogen from the Sun.”

Lovelock mentions hydrogen, not helium. Helium is four times heavier than hydrogen and exists in abundance in the Sun’s atmosphere, since it is the main product of the nuclear fusion process on the Sun. If hydrogen were gained instead of being lost, it would be reasonable to expect this to occur for helium as well. Cook says: “If we take the amount of helium 4 measured in the atmosphere and then apply the radioactive age estimation technique, we will find that the age of the Earth is approximately 175,000 years. This invalidates our reliability criteria; the possible flow of helium from external sources interrupts this process.”

Cook is not alone in his thoughts. In articles published in influential journals, similar suspicions have been stated. Funkhouser and Naughton from the Hawaiian Geophysics Institute calculated the ages of volcanic rocks that had emerged from Mount Kilauea by using the potassium-argon method and calculated them to be nearly 3 million years old. However, it is know that these rocks were formed during a volcanic eruption in 1801. McDougall from the Australian National University calculated the age of lava in New Zealand to be up to 465,000 years old, even though it was known to be less than 1,000 years old (Milton 1997).

As a result, the reliability of radioactive age estimation is doubtful. What is being measured is the amount of products that have decayed, not the rate of decay. It is also difficult to discuss the origin of these products. Subsequently, all radioactive geocronometry methods can be said to be highly flawed and to lack reliability. The only reliable result that emerges from the incompatibility between uranium-lead age and uranium-helium age is the conclusion that radioactive age estimation is totally unreliable. The methods based on the decay of potassium into argon and rubidium into strontium suffer from the above mentioned shortcomings, in addition to others. However, some scientists try hard to advocate one single idea: evolution. The evolution lobby dampens the volume of courageous scientists, such as Milton and Cook, damages their prestige and frightens others by the overwhelming atmosphere they have created. All methods developed to estimate the age of the Earth are full of inconsistencies. Only one among them (based on the radioactive decay of elements, such as uranium) provided an age of millions of years for the Earth. While that single technique was supported enthusiastically by Darwinists, all others were ignored. This was because according to Darwinist theory, evolution required a long geological past in order to display its results in the long term. This propaganda program by the Darwinists was so successful that almost everyone, including scientists from different fields, have come to believe that radioactive age estimation is the only unquestionable and valid method for age estimation. Yet, as we have discussed above, all of these widely accepted beliefs lack sufficient support.

References

• Milton, R., Shattering the Myths of Darwinism. Park Street Press. Vermont, 1997.
• Lovelock, J. E., Gaia: A New Look at Life on Earth. Oxford University Press, 1997.