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	<title>cleaning &#8211; Fountain Magazine</title>
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		<title>Fasting and Cleaning</title>
		<link>https://fountainmagazine.com/all-issues/2019/issue-1298-may-jun-2019/fasting-and-cleaning/</link>
		
		<dc:creator><![CDATA[Louima Cunningham]]></dc:creator>
		<pubDate>Wed, 01 May 2019 23:35:07 +0000</pubDate>
				<category><![CDATA[Issue 129 (May - Jun 2019)]]></category>
		<category><![CDATA[autophagy]]></category>
		<category><![CDATA[biology]]></category>
		<category><![CDATA[body]]></category>
		<category><![CDATA[cancer]]></category>
		<category><![CDATA[cell]]></category>
		<category><![CDATA[cells]]></category>
		<category><![CDATA[cellular]]></category>
		<category><![CDATA[cleaning]]></category>
		<category><![CDATA[energy]]></category>
		<category><![CDATA[fasting]]></category>
		<category><![CDATA[fat]]></category>
		<category><![CDATA[fats]]></category>
		<category><![CDATA[function]]></category>
		<category><![CDATA[functions]]></category>
		<category><![CDATA[hunger]]></category>
		<category><![CDATA[including]]></category>
		<category><![CDATA[intestinal]]></category>
		<category><![CDATA[metabolism]]></category>
		<category><![CDATA[mice]]></category>
		<category><![CDATA[Science]]></category>
		<category><![CDATA[stem]]></category>
		<category><![CDATA[yilmaz]]></category>
		<guid isPermaLink="false">http://107.21.79.195/all-issues/2019/issue-1298-may-jun-2019/fasting-and-cleaning/</guid>

					<description><![CDATA[There are many ongoing studies into fasting, a practice prescribed across many religions. Increasingly, there is evidence to support that intermittent fasting is beneficial to human health. The opposite of fasting – overeating – has been revealed to be a major culprit in many illnesses, including cancer, obesity, and heart disease. For many years, the [&#8230;]]]></description>
										<content:encoded><![CDATA[<p><img fetchpriority="high" decoding="async" class=" size-full wp-image-6709" src="https://fountainmagazine.com/wp-content/uploads/2019/05/fasting-74b.jpg" alt="Fasting and Cleaning" width="1920" height="1200" srcset="https://fountainmagazine.com/wp-content/uploads/2019/05/fasting-74b.jpg 1920w, https://fountainmagazine.com/wp-content/uploads/2019/05/fasting-74b-300x188.jpg 300w, https://fountainmagazine.com/wp-content/uploads/2019/05/fasting-74b-1024x640.jpg 1024w, https://fountainmagazine.com/wp-content/uploads/2019/05/fasting-74b-768x480.jpg 768w, https://fountainmagazine.com/wp-content/uploads/2019/05/fasting-74b-1536x960.jpg 1536w" sizes="(max-width: 1920px) 100vw, 1920px" /></p>
<p>There are many ongoing studies into fasting, a practice prescribed across many religions. Increasingly, there is evidence to support that intermittent fasting is beneficial to human health.</p>
<p>The opposite of fasting – overeating – has been revealed to be a major culprit in many illnesses, including cancer, obesity, and heart disease.  For many years, the medical consensus was that fasting, i.e. prolonged hunger, too, could have deleterious effects on the human body. From kidney failure to loss of muscle, fasting was believed to be harmful – thus calling into question the benefits of this widespread religious commandment.</p>
<p>People of faith – including Muslims – have long believed that God wouldn’t recommend a practice that was harmful to the body. The hardships and troubles that accompany a religious practice are not too extreme for people aware of their servitude to God: they regard their trials as a testament of their faith. Part of that faith is the certainty that God wouldn’t recommend a harmful or unbearable practice.</p>
<p>In this article, we will share with you two unknown benefits of fasting that have been recently discovered.</p>
<h3>Regenerating stem cells</h3>
<p>There is a substantial body of evidence showing that staying hungry during certain periods of the day heals the body’s metabolism, hastens loss of fat, decreases oxidative stress,* and improves the functions of the tissues that make up various organs including the liver, the intestines, and the brain. The first of the two new discoveries about the underlying processes, however, provides a missing piece of the puzzle by helping us understand the incredible changes hunger triggers in stem cells.</p>
<p>Researchers at MIT, Duke University School of Medicine, and Whitehead Institute for Biomedical Research in Cambridge published an article recently on stem cells, indicating that part of stem cell’s mystery could lie in the oxidation (burning) of fat in the mitochondria [1]. Omer H. Yilmaz and his fellow researchers found that a 24-hour fast hastens fat breakdown in intestinal stem and special progenitor cells of rats.</p>
<p>To run the study, Yilmaz and colleagues let the mice go hungry for 24 hours to study the state of their stem cells. They found that the functions of intestinal stem cells increased, and fat metabolism quickened, in both young and aged mice, even during early periods of hunger. They saw that the body’s tapping into fat for its energy needs maintained the health and strength of the intestinal stem cells. Moreover, they noticed that if the aged mice did not fast, they started to lose their ability to break down and use fats for energy expenditure.</p>
<p>The researchers obtained more interesting results as the studies progressed. It was found that a single period of hunger for 24 hours boosted renewal of intestinal cells – and the stem cell functions increased even more significantly in aged mice. Another interesting finding was that mice with damaged intestines that were fasted recovered faster than those that were fed.</p>
<p>“<em>My lab is really interested in understanding how diet, in general, can be used to improve tissue function,” </em>Yilmaz said.<em> “One of the tissue types I study is the intestine. In my lab we study the intestine because it’s one of the largest organs in the body. It’s also a tissue that experiences rapid cellular turnover</em>.” [2]</p>
<p>The intestine is lined by a single layer of cells, Yilmaz explains, that turns over every 5 to 7 days. The workhorses of the intestinal lining and this cellular turnover are intestinal stem cells. These cells must retain a high level of function or cellular health in order to replenish the intestinal epithelium on a regular basis. Intestinal stem cells are particularly important in terms of repairing intestinal damage caused by gut infections and chemotherapy, for example.</p>
<p>The single layer of epithelial cells <em>needs</em> to be renewed every 5-7 days: the aids and enzymes secreted in the intestine for digestive and absorptive activities damage cells despite the protective mucus layer, and some other cells already burst and die as they empty their secretions. Moreover, some medications, particularly chemotherapy, cause the destruction and breakdown of the epithelial cell layer. However, fast-multiplying stem cells replenish the epithelial cells. Stem cells are very active and young and have the ability to divide and multiply continuously.</p>
<p>Dr. Yilmaz also says:</p>
<p> “<em>As we age, stem cells in the intestine as well as in many other tissues of the body, including in the blood and nervous systems, become less functional. We believe that reduced adult stem cell function contributes to some of the decline of function associated with old age. My lab is very interested in studying low-calorie interventions to delay this decline. As a field, we’ve known for over 100 years that low-calorie states such as fasting or caloric restriction can have positive effects on tissue health and aging. We’ve seen evidence that fasting during times of intestinal infections that lead to diarrhea may promote healing of the intestinal lining, for example</em>.” [2]</p>
<p>This quote emphasizes the importance of the issue. Yilmaz adds that despite all this knowledge, the cellular mechanisms of this renewal have not been discovered, and he and his team are working to find out how fasting and hunger enable this recovery. </p>
<h3>Stem cells become happy in fat!</h3>
<p>The researchers discovered through the experiments that the stem cell function could be brought about in hungry mice by the burning (oxidation) of fatty acids in intestinal cells. When they stopped the fat metabolism through genetic engineering, they noticed that the benefits of fasting on intestinal stem cells were negligent.</p>
<p>In the present dietary conditions, we obtain nearly 60-70% of our energy from carbohydrates or sugar, 20% from fats and 10% from amino acids. Yet an interesting finding revealed by Dr. Yılmaz and his research team is that we essentially obtain much greater energy from using fats once we fast. According to their experiments on mice, during fasting, the intestinal stem cells in both young and aged mice switch from carbohydrates to fats as the primary source of energy, and this shift enables improvement in stem cell functions.</p>
<p>It is not yet known what underlies the fat metabolism that boosts stem cell functions in response to fasting, but it is observed that stem cells work better when they burn fat. The ability to metabolize fats efficiently decreases with age.</p>
<p>It is likely that this hastened metabolism – encouraged by certain diets, like the keto diet, where the amount of fat ingested is raised to 70% and carbohydrate intake is limited to 5% – helps with epileptic seizures and similar neurological disorders: the ketone bodies generated during metabolism of fats are used as energy sources by the brain.</p>
<p>According to Dr. Yilmaz, if fasting can improve the functions of intestinal stem cells through metabolism of fats, the key is the <strong>mitochondria</strong>, the powerhouses of the cell responsible for this function. Fat metabolism, or the immediate breaking down or “burning” of the fat entering the cell, is carried out in the mitochondria. Disrupted energy generation associated with aging and decreasing mitochondria can be a reason for the brain’s susceptibility to age-related illnesses. Positive developments in brain functions can therefore be viewed in connection with the correlation between fasting and the oxidation of fatty acids.</p>
<h3>Cleaning by fasting</h3>
<p>Just like the spring cleaning in our homes, our cells need a thorough cleaning to function properly. Wrongly folded protein particles, remains of damaged organelles, broken molecular pieces, and aged cells that can no longer divide should be disposed out of our cellular structure. Fasting perfectly performs the task of cleaning these wastes and clearing the area in the cell.</p>
<blockquote>
<p>“Everything has <em>zakat</em> (a means of cleaning), and the <em>zakat</em> of the body is fasting.” (Ibn-i Majah, Siyam: 44)<br />“Fasting is a protective shield.” (Bukhari, Sawm: 2)</p>
</blockquote>
<p><img decoding="async" class=" size-full wp-image-6710" title="Fasting and Cleaning" src="https://fountainmagazine.com/wp-content/uploads/2019/05/fastingA-f55.jpg" alt="Fasting and Cleaning" width="1920" height="1200" srcset="https://fountainmagazine.com/wp-content/uploads/2019/05/fastingA-f55.jpg 1920w, https://fountainmagazine.com/wp-content/uploads/2019/05/fastingA-f55-300x188.jpg 300w, https://fountainmagazine.com/wp-content/uploads/2019/05/fastingA-f55-1024x640.jpg 1024w, https://fountainmagazine.com/wp-content/uploads/2019/05/fastingA-f55-768x480.jpg 768w, https://fountainmagazine.com/wp-content/uploads/2019/05/fastingA-f55-1536x960.jpg 1536w" sizes="(max-width: 1920px) 100vw, 1920px" /></p>
<h3>What is autophagy?</h3>
<p>Autophagy is the compound of two ancient Greek words: <em>auto</em> (self) and <em>phagos</em> (eating). What is meant by “self-eating,” is the breaking down and recycling of protein waste and old, impaired molecules by intracellular digestive organelles called lysosomes. In this way, proteins or cellular organelles are digested and taken out of circulation. We can liken autophagy to garbage collection.</p>
<p>Japanese researcher Yoshinori Ohsumi’s study, which brought him the 2016 Nobel Prize for Medicine, found that the autophagy that occurs inside the cell due to fasting or starvation plays an important role in preventing ageing, infections, and tumors. If autophagy breaks down, many illnesses may be triggered, including cancer. Conversely, if autophagy activity is regular, tumors may be suppressed – depending on the stage of development and type of tumor. Cancer research has long focused on channeling these autophagic activities. Restriction of food intake through fasting shows promise: it may protect normal cells while triggering autophagy and thus increasing the effect of cancer treatments. Autophagy might offer solutions or treatment options for other illnesses, too, including inflammatory diseases [3], neurodegeneration [4], metabolic and cardiovascular diseases [5], obesity [6], and metabolic disorders.</p>
<p>Preclinical studies have shown that dietary restrictions by fasting contribute to the increase of a person’s lifespan and slow the development of age-related diseases such as cancer and neurodegenerative and cardiovascular diseases [7].</p>
<p><strong>* Oxidative stress: </strong>The damage caused as a result of excessive proliferation of free oxygen radicals released from foods that spike blood sugar (with high glycemic index) as metabolic waste. A good example of oxidative stress is the browning of certain foodstuff such as apples, bananas, etc. sometime after they are peeled.</p>
<h3>References</h3>
<ol>
<li>Yilmaz, Omer H. et al. 2018. “Fasting Activates Fatty Acid Oxidation to Enhance Intestinal Stem Cell Function during Homeostasis and Aging.” <em>Cell Stem Cell,</em> Vol. 22, Issue 5, May 3, pp. 769–778.</li>
<li>Paige Brown Jarreau. 2018. “Eating (Or rather, Fasting) Our Way to Rejuvenated Stem Cells?” in <em>Life and Tech</em> @ LifeOmic. June 7. A Medium Corporation.</li>
<li>Cadwell K. 2016. “Crosstalk between autophagy and inflammatory signaling pathways: balancing defence and homeostasis.” <em>Nat Rev Immunol.</em>16 (11): 661–75.</li>
<li>Menzies FM, Fleming A, Caricasole A, Bento CF, Andrews SP, Ashkenazi A et al. 2017. “Autophagy and Neurodegeneration: Pathogenic Mechanisms and Therapeutic Opportunities.” <em>Neuron. </em>93 (5):1015–34.</li>
<li>Bravo-San Pedro JM, Kroemer G, Galluzzi L. 2017. “Autophagy and Mitophagy in Cardiovascular Disease.” <em>Circ Res. </em>120((11)):1812–24.</li>
<li>Lavallard VJ, Meijer AJ, Codogno P, Gual P. 2012: “Autophagy, signaling and obesity.” <em>Pharmacol Res. </em>66 (6):513–25.</li>
<li>O’Flanagan CH, Smith LA, McDonell SB, Hursting SD. 2017. “When less may be more: calorie restriction and response to cancer therapy.” <em>BMC Med. </em>15(1):106.</li>
</ol>
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		<title>How Is Nature Being Cleaned?</title>
		<link>https://fountainmagazine.com/all-issues/2014/issue-99-may-june-2014/how-is-nature-being-cleaned-may-2014/</link>
		
		<dc:creator><![CDATA[Louima Cunningham]]></dc:creator>
		<pubDate>Thu, 01 May 2014 00:00:00 +0000</pubDate>
				<category><![CDATA[Issue 99 (May - June 2014)]]></category>
		<category><![CDATA[A Moment for Reflection]]></category>
		<category><![CDATA[animals]]></category>
		<category><![CDATA[bacteria]]></category>
		<category><![CDATA[bodies]]></category>
		<category><![CDATA[carbon]]></category>
		<category><![CDATA[cleaning]]></category>
		<category><![CDATA[dead]]></category>
		<category><![CDATA[decomposition]]></category>
		<category><![CDATA[earth]]></category>
		<category><![CDATA[fall]]></category>
		<category><![CDATA[house]]></category>
		<category><![CDATA[lake]]></category>
		<category><![CDATA[land]]></category>
		<category><![CDATA[nature]]></category>
		<category><![CDATA[ocean]]></category>
		<category><![CDATA[organisms]]></category>
		<category><![CDATA[plankton]]></category>
		<category><![CDATA[process]]></category>
		<category><![CDATA[Science]]></category>
		<category><![CDATA[species]]></category>
		<category><![CDATA[whale]]></category>
		<category><![CDATA[whales]]></category>
		<guid isPermaLink="false">http://107.21.79.195/all-issues/2014/issue-99-may-june-2014/how-is-nature-being-cleaned-may-2014/</guid>

					<description><![CDATA[After a long, busy, and exhausting year, he wanted to take a rest in his summer house, which lies under a mountain opposite a nice, blue lake. He deserved this holiday. After parking his car in front of the oak trees, he opened the wooden door of the house. The scene he saw was not [&#8230;]]]></description>
										<content:encoded><![CDATA[<p>After a long, busy, and exhausting year, he wanted to take a rest in his summer house, which lies under a mountain opposite a nice, blue lake. He deserved this holiday. After parking his car in front of the oak trees, he opened the wooden door of the house. The scene he saw was not good at all. Spider webs were everywhere and dust had covered everything in the house. This was not the thing he had dreamed of. He was dreaming of a good holiday, not a holiday spent cleaning. He just left the door open and walked towards the lake to sit under a tree and take a fresh breath. He kept looking at the lake for a while and then, finding something interesting, he looked at the mountain, the forest, and the grasses on the ground. He started to talk to himself: &#8220;How? How could this happen? Even though nearly a year has passed, the lake, mountain, and grasses are as clean as I left them last year, but my house is a mess?&#8221; After thinking a little, he came up with a question he had never thought of in 50 years: &#8220;What makes nature so clean?&#8221;</p>
<p><span id="more-1646"></span></p>
<p>I am sure that there are a lot of people who&#8217;ve found themselves in a similar situation to the man above. Unfortunately, most of us are usually not aware of the things happening in this universe. One of the things we tend to overlook is the cleanliness of nature. This is a topic which needs to be considered carefully, but I will just touch on some important aspects of this issue.</p>
<p>First, let&#8217;s look at the oceans. The oceans cover three-fourths of the Earth&#8217;s surface. There is a bigger world under the ocean than above it. This huge mass hosts jelly fish and tuna, dolphins and octopus, crabs and plankton, sea stars and sea plants. Currently, there are 120,000 species living in the ocean. This is just the number of the species, and doesn&#8217;t account for how many variations there are within each species. When we consider the number of living organisms, there are millions of them. Every single day, lots of these organisms die. If there are millions of organisms and thousands of them die each day, then why cannot we see them on the surface of the ocean? Even if these dead organisms are very small, such as plankton, which has a size range from 0.2 m to 20mm, when millions of their dead bodies cluster on the surface, we should be able to see them. The answer lies in a perfect arrangement. For example, the job of cleaning the dead bodies of plankton (also the live bodies!) is performed by fish, sharks, and whales. A large percentage of the daily diet of these animals depends on plankton. Since these animals perform their job well, it is impossible to see any dirt that would have been caused by the dead plankton.</p>
<p>It might seem easy to get rid of the dead bodies of plankton, because they are small organisms. But what about big animals such as whales? What happens to dead whales? Let&#8217;s consider the cleaning of dead whales. When a whale dies, its dead body sinks to the bottom of the ocean. This is called a &#8220;whale fall&#8221; by scientists. There are a lot of species whose diet depends on dead whales. In 1988, a group of researchers at the University of Hawaii found that there are at least 12,490 single organisms which supply their daily diet from a whale fall in the deep North Pacific Ocean. After bigger organisms, such as fish, finish their job, which includes eating the flesh of the dead whale, the other cleaners come to the scene to perform their roles. At this part of the fall, bacteria play a key role in cleaning the bones left from the whale fall. This is not as easy as it might seem. Actually, it takes several years to really clean the dead body from the bottom of the ocean. This is not just a cleaning process at all. While the whale fall is being cleaned from the bottom of the ocean, the ecosystem is supported by the energy from the dead whale.</p>
<p>This cleaning process is not only seen in the oceans, but also on the land. Even though it is more apparent than undersea, we are not totally aware of the cleaning process on land. Decomposition is the chain of events by which a dead organism breaks down to its smaller parts. We must stop here and ask this question: &#8220;What would happen if these dead organisms stayed on the land forever?&#8221;</p>
<p>So let&#8217;s look at what happens to a dead animal on land.</p>
<p>When an organism dies, the process of decomposition starts shortly after its death. There are some stages in the decomposition of an animal. Shortly after the death of the organism, the enzymes in the cytoplasm of the cells start to break down the tissues. This process is called autolysis. It is one of the stages of decomposition in which bacteria plays a role. Bacteria start to break down the tissues. This is called putrefaction. Bacteria are not the only players who have roles in this process. Besides them, some fungi, insects, and even some carnivores are also involved. Live animals, water, air, and temperature (higher temperatures increase the decomposition rate) also help this process. During this time, fungi and bacteria, by using compounds from the dead organisms, convert carbon to carbon dioxide and organic nitrogen to ammonium (NH4+), and so they contribute to both the Carbon and Nitrogen Cycle. After this process is done, many organisms living in the ecosystem have benefitted. At the end of this cycle, soil is enriched with new nutrients which will help the new plants to grow up and the Carbon and Nitrogen cycles are enhanced.</p>
<p>By looking at the processes above, as well as other cycles (e.g. the Carbon cycle), it can be said that the Earth has its own recycling system. While modern societies have only recently understood the importance of recycling, Earth has been using this system thanks to the arrangements given to it.</p>
<p>The things shown here are just some examples of the extraordinary systems existing on the Earth. These systems have always been like this, since the very beginning of the universe. These perfects systems in nature perform their tasks without any human help. The only thing for us to do is to appreciate this harmony, understand its value, and keep it going for the next generations.</p>
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		<title>The Lotus Effect: A Manifestation of Divine Purity</title>
		<link>https://fountainmagazine.com/all-issues/2013/issue-91-january-february-2013/the-lotus-effect-a-manifestation-of-divine-purity/</link>
		
		<dc:creator><![CDATA[Louima Cunningham]]></dc:creator>
		<pubDate>Tue, 01 Jan 2013 00:00:00 +0000</pubDate>
				<category><![CDATA[Issue 91 (January - February 2013)]]></category>
		<category><![CDATA[angle]]></category>
		<category><![CDATA[barthlott]]></category>
		<category><![CDATA[clean]]></category>
		<category><![CDATA[cleaning]]></category>
		<category><![CDATA[contact]]></category>
		<category><![CDATA[dirt]]></category>
		<category><![CDATA[effect]]></category>
		<category><![CDATA[electron]]></category>
		<category><![CDATA[Environment]]></category>
		<category><![CDATA[hating]]></category>
		<category><![CDATA[leaf]]></category>
		<category><![CDATA[leaves]]></category>
		<category><![CDATA[lotus]]></category>
		<category><![CDATA[microscope]]></category>
		<category><![CDATA[plant]]></category>
		<category><![CDATA[plants]]></category>
		<category><![CDATA[repelling]]></category>
		<category><![CDATA[surface]]></category>
		<category><![CDATA[surfaces]]></category>
		<category><![CDATA[technology]]></category>
		<category><![CDATA[The Lotus Effect]]></category>
		<category><![CDATA[water]]></category>
		<guid isPermaLink="false">http://107.21.79.195/all-issues/2013/issue-91-january-february-2013/the-lotus-effect-a-manifestation-of-divine-purity/</guid>

					<description><![CDATA[The lotus, a radiant and graceful aquatic plant with a magnificent ability to repel dirt, has been the inspiration behind a range of self-cleaning and dirt-repelling technologies. Now a registered trademark, the “Lotus Effect” promises a future filled with objects that rarely, if ever, need washing. Finally, this means owning bathroom mirrors that unfog itself [&#8230;]]]></description>
										<content:encoded><![CDATA[<blockquote>
<p>The lotus, a radiant and graceful aquatic plant with a magnificent ability to repel dirt, has been the inspiration behind a range of self-cleaning and dirt-repelling technologies. Now a registered trademark, the “Lotus Effect” promises a future filled with objects that rarely, if ever, need washing. Finally, this means owning bathroom mirrors that unfog itself and shirts that shrug off ketchup and coffee.</p>
</blockquote>
<p>And the earth, We have spread it out like a couch; and how excellent We are in spreading it. (Adh-Dhariyah, 51:48)</p>
<p>The factory of the universe and the guesthouse of the earth are so pure and clean and so untainted and fresh that … if … the act of cleansing is not attributed to the Creator of the universe, then … [e]ither all the creatures would have a share in the universal act of cleansing… or there would have to be a consultative committee the size of the universe in order to decide and regulate all those acts together… This is impossible not just once, but hundreds and thousands of times over. (4)</p>
<p>Have you ever come across a “stinky forest”? How about a “messy desert”? These questions are primarily posed as rhetoric since various means of sanitation is ubiquitous in nature (Stinky forests and lakes actually exist only thanks to pollution—a modern problem introduced by human intervention via misconduct of technology) where Lotus Effect is only one of the mechanisms contributing to the steady “house-keeping” in nature.</p>
<p>In muddy waters, the lotus plant stands out with its ever-clean leaves making it a symbol of purity in Asian cultures. Moreover, lotus leaves keep dry under even the heaviest monsoon rain. Such seemingly ironical feats are accomplished by capitalizing on a principle named after the plant itself: The Lotus Effect.</p>
<h3>The Lotus Effect</h3>
<p>At first sight, the cleansing of the leaves by the rainfall seems utterly trivial. However, the cleaning of the lotus plant (Nelumbo nucifera) by the downpour is not something to be taken for granted. Curiously, when raindrops encounter the lotus leaf, they adopt an almost perfectly spherical shape, resembling ball bearings, and start rolling off the surface carrying away all the dirt (Figure 1). Easier said than done, the lotus plant always keeps pristine, even at the microscopic level.</p>
<p>In the early 1970s, soon after the electron microscope (which can yield vivid images of the ultra small details that are at length scales on the order of a billionth of a meter) became commercially available, German botanist Wilhelm Barthlott (of University of Bonn, Germany) started imaging plants using the newly discovered technology. Sample preparations for electron microscopy normally demanded tedious cleaning procedures since even a speckle of dust could ruin the portrayed landscape at such minuscule scales. To Barthlott’s surprise, some plants apparently were “self-cleaning”: They required very little (or sometimes none whatsoever) cleaning for detailed inspection with the microscope and the lotus plant was a prince of these (1). Further intrigued by the fact, Barthlott looked at the lotus leaves through the electron microscope to find out what renders the lotus plant remarkably competent to repel even the tiniest dirt.</p>
<h3>Water’s love-hate affair</h3>
<p>Before delving into the secrets for lotus plant’s sanitation, let’s look at the interaction of water with other materials. At the molecular level, the electrical charges are unevenly distributed across a water molecule (i.e. water is highly “polar”) which becomes entangled in a love-hate type of relationship with other materials: Some materials “love” water tending to maximize their interaction with it, whereas others “hate” it, trying to avoid their encounter with water as much as possible.1 To put things in perspective, we can immediately tell from everyday experience that oil is “water-hating” since oil and water do not mix, while sugar is “water-loving” because sugar can dissolve in water without much effort.</p>
<p>Macroscopically—that is, one can immediately realize by touching a lotus leaf—the lotus leaf surface feels waxy, and should therefore be water-hating. However, the waxiness is not enough to equip the lotus plant with its unusual capabilities to remain clean since the lotus leaf is not alone among plants in its leaves’ surface waxiness. Indeed, there is more to the lotus leaf’s curious surface properties than that, a property which was first recognized by Barthlott under the electron microscope.</p>
<h3>Super water-hating surfaces</h3>
<p>When Barthlott looked at the lotus leaf, besides its spotlessness in the microscopic sense, the leaf surface was decorated with numerous bumps a few micron sizes each (a micron is one millionth of a meter). Such bumpiness served to enhance the water-hating aspect of the surface making it “super water-hating,” corresponding to a contact angle that is close to 170 degrees. As a result, water encountering the lotus leaf surface rapidly beads up forming a nearly spherical shape (akin to the scenario when one drips water on a hot cooking pan) and drops roll off the surface even with an ever-so-slight inclination of the leaf. Apparently, a rolling water droplet is much more effective in picking up the surface dirt than one that is merely sliding, and all the surface debris is thus wiped off.</p>
<p>Although discovered first in the lotus plant, the super water-hating surfaces are serving a passive yet effective means of cleaning for animals like butterflies, dragonflies and other insects that are not able to clean all their body parts actively. For plants, preventing the coverage of their leaves by water (or other contaminants) is important to maximize the exposure to sunlight which would otherwise cause reduced photosynthesis. Another great biological relevance of surfaces of such nature for all these creatures is that it provides protection against the growth of pathogens by keeping the surface dry at all times.</p>
<h3>Inspirations from biology for technology</h3>
<p>There are ever-growing biologically inspired technologies, so-called biomimetics, and the lotus effect provides a nifty example. Unfolding the mystery behind lotus’ exceptional competence in self-cleaning, Barthlott patented the idea of artificially manufacturing microscopically-raised, water-repelling surfaces to mimic the lotus leaf. “Lotus Effect” is now a registered trademark which underlies commercial products such as self-cleaning windows and fabrics, as well as a dirt-repelling paint. Other applications that are waiting around the corner are: swimsuits that stay dry for days allowing prolonged underwater excursions, coatings on metals to avoid the deposits of marine bioorganisms which would enable up to 40% reduction on fuel consumption by decreasing friction (2). Metal coatings will also find applications to prevent ice formation on plane engines alleviating their wear-and-tear (3).</p>
<p>Apparently, lotus does not collect dirt, but only patents.</p>
<h3><b>Note</b></h3>
<p>1 Contact angle is a metric for the water propensity of a surface. Water drop displays a higher contact angle (hence lower contact area) on a water-hating surface when compared to a lower contact angle (hence higher contact area) on a water-loving one.</p>
<h3><b>References</b></h3>
<p>1. Forbes, Peter. August, 2008. “Self Cleaning Materials,” Scientific American.</p>
<p>2. http://www.basf.com/group/</p>
<p>corporate/en/innovations/events-presentations/nanotechnology/basf</p>
<p>3. “Water-Repelling Metals,” Prachi Patel, MIT Technology Review, 2008, http://www.technologyreview.com/energy/21530/</p>
<p>4. “The Thirtieth Gleam,” Bediuzzaman Said Nursi, Risale-i Nur Collection.</p>
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		<title>Soil-Cleaning Plants</title>
		<link>https://fountainmagazine.com/all-issues/2008/issue-66-november-december-2008/soil-cleaning-plants/</link>
		
		<dc:creator><![CDATA[Louima Cunningham]]></dc:creator>
		<pubDate>Sat, 01 Nov 2008 00:00:00 +0000</pubDate>
				<category><![CDATA[Issue 66 (November - December 2008)]]></category>
		<category><![CDATA[aluminum]]></category>
		<category><![CDATA[arsenic]]></category>
		<category><![CDATA[cadmium]]></category>
		<category><![CDATA[cesium]]></category>
		<category><![CDATA[cleaning]]></category>
		<category><![CDATA[Environment]]></category>
		<category><![CDATA[heavy]]></category>
		<category><![CDATA[high]]></category>
		<category><![CDATA[living]]></category>
		<category><![CDATA[metals]]></category>
		<category><![CDATA[plant]]></category>
		<category><![CDATA[plants]]></category>
		<category><![CDATA[polluted]]></category>
		<category><![CDATA[radioactive]]></category>
		<category><![CDATA[Science]]></category>
		<category><![CDATA[soil]]></category>
		<category><![CDATA[soils]]></category>
		<category><![CDATA[species]]></category>
		<category><![CDATA[substances]]></category>
		<category><![CDATA[thlaspi]]></category>
		<category><![CDATA[zinc]]></category>
		<guid isPermaLink="false">http://107.21.79.195/all-issues/2008/issue-66-november-december-2008/soil-cleaning-plants/</guid>

					<description><![CDATA[Soil has significant functions for securing the maintenance of life on earth. The food and water that plants need are provided via soil. A wide variety of living species which find shelter in the bosom of the soil performs vital functions for securing life in the continental ecosystem. Bacteria, mushrooms, ants, larvae, spiders, earthworms, snails [&#8230;]]]></description>
										<content:encoded><![CDATA[<p>Soil has significant functions for securing the maintenance of life on earth. The food and water that plants need are provided via soil. A wide variety of living species which find shelter in the bosom of the soil performs vital functions for securing life in the continental ecosystem. Bacteria, mushrooms, ants, larvae, spiders, earthworms, snails and rodents are only some of this variety. These living species exist abundantly in the soil. In a soil layer of one hectare (2,47 acres or 10.000 m2) and 30 cm (approx. 1 feet) thickness, for instance, approximately 25 tones of subsoil organisms are sheltered.</p>
<p><span id="more-972"></span></p>
<p>The conservation of soil is also important. But as its value has not been properly appreciated until recently, soil has become seriously polluted with chemical substances which can hurt the living species in it. These poisonous chemical substances include cadmium, arsenic, chrome, and mercury at excessive levels, lead, nickel, molybdenum and fluorine at medium levels and boron, copper, manganese and zinc at low levels.</p>
<p>There are a number of sources of these substances which accumulate in subsoil. Tones of such substances are dispersed into the atmosphere as a result of the burning of fossil fuels, the casting of minerals and other industrial activities. Atmospheric processes cause these substances to disperse and mix with the soil first and penetrate into plants later; polluted water and soil consequently cause disastrous problems for construction, the environment, and health.</p>
<p>The level of borax which is available in soil, for instance, is becoming overwhelming due to the extensive use of detergents and fertilizers. Super phosphate, which is a kind of fertilizer, and limestone, which is found in soil, are generally composed of small quantities of cadmium, copper, manganese, nickel and zinc. Cadmium and chrome are utilized in producing metal coatings; cadmium is also used in battery production; and arsenic is utilized in cotton, tobacco and fruit plantations as an insect and weed killer. As products in which these substances are found have been increasingly used in recent years, these substances have been consumed by human beings in higher proportions in their daily air, water and food intakes.</p>
<p>Although presently a partial solution, a method of improving soil by the use of plants has recently been developed and introduced as a clean and permanent solution. Research conducted has proved that plants have important functions in cleaning chemically polluted soil, and significant scientific findings have been obtained about how plants survive in an environment replete with poisonous chemicals.</p>
<h3><b>Plants: The volunteer soil cleaners </b></h3>
<p>The use of plants to eliminate substances which are unfriendly to the environment or to diminish their negative effects on the environment is called “phytoremediation.” Cleaning polluted soil with techniques that necessitate engineering processes is a rather costly operation. On the other hand, certain plant species have been granted the ability to concentrate heavy metals such as zinc, cadmium and nickel, which they take up from the soil, in their stems, shoots and leaves. The parts of these plants containing the concentrations of heavy metals are collected, reduced in volume and are stored for future use.</p>
<p>Plants which are capable of storing metals in themselves are used for soil-cleaning purposes in the mining industry. Bio-mining is defined as obtaining minerals by way of growing plants in polluted or mineralized soils and then harvesting them as soon as they have concentrated a sufficient amount of minerals in their tissues. Plants are burned after being baled and their residual ashes are being sold as mineral ores. Zinc has been produced at a rate of 30–40 % from ashes of the plant thlaspi caerulescens which was grown in a plantation rich in zinc in Pennsylvania.</p>
<h3><b>How plants are employed in soil cleaning </b></h3>
<p>Lately, a number of research projects have initiated on the plant thlaspi caerulescens, which is seen as useful in terms of soil cleaning. Thlaspi is a member of the broccoli and cabbage family and it grows in soils containing high rates of zinc and cadmium. These plants develop wide root formations in soils containing heavy metals; they transfer these heavy metals via their hair-like roots first to their stems and later to other parts, and store those heavy metals in their leaves. Storers like thlaspi are a good model of the mechanism of metal-storing and even shed light onto the biological system which plays a role in this process. The biological composition of these plants has been enriched with genes so that they assume a role in increasing the solubility of heavy metals in soil, in the transfer of metals to their roots, and in producing proteins to play the intermediary in such transfers.</p>
<p>While a typical plant is equipped with a storage capacity of 100ppm (gr per ton) zinc and 1ppm cadmium, thlaspi is created with a storage capacity of up to 30,000 ppm of zinc and up to 1,500ppm of cadmium, without any signs of being poisoned, whereas an ordinary plant may be poisoned with a zinc level of only 1,000ppm or cadmium between 20 and 50ppm. What would it have meant for living beings which are nourished by plants, if all plants had been created with as high a storage capability for heavy metals as that of thlaspi?</p>
<p>It has been noted, while researching the zinc-storage mechanism of thlaspi, that certain parts of the plant have been stimulated for the purpose of transferring zinc. While in ordinary plants gene-decoding of proteins which are charged with zinc transfer is regulated according to their zinc contents, in thlaspi synthesizing of the carrier proteins continues until the zinc contents of its tissues reaches very high levels.</p>
<h3><b>How radioactive cesium is cleaned </b></h3>
<p>It has been found, as a result of research into soils polluted with radioactive cesium-134 and cesium-137, that the area polluted by cesium-137 is under the threat of radioactive pollution, even if the effects of pollution that it caused over the soil surface would be lessened. One of the most important reasons for this is that cesium-137 is a long-lasting radioactive isotope with a half-life of 32.2 years.</p>
<p>Phytoremediation is preferable to alternative cleaning methods, which cost much more due to high energy inputs. However, cesium, in the form it is found in soil, is not absorbed by most plants, and ammonium ions cause the dissolution of cesium-137 in soil.</p>
<p>However, amaranthus retroflexus, which is a member of the goose-foot plant family, has been found to be forty times more efficient than other plants tested in cleaning the soil of radioactive cesium. Thus, polluted lands are expected to be cleaned within fifteen years if this plant is grown and harvested two or three times annually.</p>
<h3><b>A plant fed by arsenic </b></h3>
<p>Arsenic is utilized in the production of agro-chemicals that are used to kill weeds and insects in the sub-soil. The fern named pteris vittata has been found to be created with the capacity to store arsenic. When this plant fern was discovered to contain two hundred times more arsenic than the surrounding soil, it was understood that it is fed by arsenic. This discovery is expected to open new horizons in cleaning the agricultural land, especially in industrial and mining areas.</p>
<h3><b>How damage caused by aluminum can be decreased </b></h3>
<p>Aluminum, which is one of the most abundantly available elements (among oxygen, silicon, iron, magnesium, sodium, potassium, aluminum and calcium) in the earth, is among the main components of clay in sub-soil. It does not pose a threat to plants when it has a basic or neuter pH value. However, Al+3 which is a kind of aluminum dissolvable in acidic soils, is poisonous to the extent that it threatens plant roots.</p>
<p>How some plant species, among which are wheat, corn and barley, can be cultivated in acidic soils in spite of high metal rates is being researched. Studies in this context are being conducted on arabidopsis thaliana (the mustard family) whose gene map is prepared and which constitutes a model. A mutated arabidopsis, for instance, has been discovered to have been equipped with the capacity to render aluminum harmless. If the genes which play their role in this process can be determined, then gene transplantation will be possible to increase the resistance of plants which are sensitive to aluminum, such as barley, and barley production will accordingly be increased.</p>
<p>All these facts clearly indicate that the earth is like a great and continuously working factory or a guest house continuously becoming full and empty. The pollution which is an inevitable result of the activities of living creatures is kept under control by micro organisms, plants and animals which are the mirror-bearers of Almighty God’s attribute, al-Quddus, “the All-Pure.” The relations between these living creatures and the universe have been so perfectly programmed that all of them beautifully perform their duties.</p>
<p><b>References</b></p>
<ul>
<li>Brady, N.C. The Nature and Properties of Soils, 1990, 10th Edition.</li>
<li>http://www.agclassroom.org/teen/ars_pdf/9earth/2000/06phytoremedation.pdf</li>
<li>Altunay, Bedirhan. “Biotechnology of the Environment,” 2006, Sizinti, No: 335, p.526–528.</li>
</ul>
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