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	<title>Biology Lab Experiments</title>
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	<description>all about biology lab experiments</description>
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		<title>Gene Offers New Lead in Cleft Lip and Palate Research</title>
		<link>http://biologylabexperiments.com/article-review/gene-offers-new-lead-in-cleft-lip-and-palate-research/</link>
		<comments>http://biologylabexperiments.com/article-review/gene-offers-new-lead-in-cleft-lip-and-palate-research/#comments</comments>
		<pubDate>Sat, 06 Sep 2008 06:58:38 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Article Review]]></category>

		<guid isPermaLink="false">http://biologylabexperiments.com/?p=21</guid>
		<description><![CDATA[The much-studied gene called SUMO1 when prompted may possibly trigger cleft lip and palate known to be as one of the most usual genetic abnormalities. This is based from the study conducted by the researchers that are supported by the National Institutes for Health. Currently, there are a number of genes that were previously associated [...]]]></description>
			<content:encoded><![CDATA[<p>The much-studied gene called SUMO1 when prompted may possibly trigger cleft lip and palate known to be as one of the most usual genetic abnormalities. This is based from the study conducted by the researchers that are supported by the National Institutes for Health. Currently, there are a number of genes that were previously associated in the instigation of cleft lip and palate. Addition to the list is the newly discovered SUMO1, which turns up with a distinct biological twist. The gene predetermined a tiny protein that is connected to the protein products of not less than three earlier determined clefting genes at the time of facial progression, in quintessence associating them into or close to a communal controlled conduit and currently the hotspot for clefting.<span id="more-21"></span></p>
<p>The researchers have admitted that the immense trial for study on cleft lip and palate is to shift from investigating single genes to delineating single protein systems. When they say protein system, the researchers actually connote a nexus of proteins that interrelate in an extremely controlled manner. At the current degree of dynamism and real-time situation, science will start to witness the huge picture and taunt more of the necessary insights to comprehend and finally avert the development of cleft lip and palate in infants. The SUMO1 permits the scientists the commencement of association of some points and optimistically link into an extremely helpful protein system that feeds into more protein systems to create the palate or covering of the mouth. The findings, in addition provides a primary sample of the influence of genomic research, the relative investigation of single or groups of correlated genes between species, from yeast to human. The findings also emphasize the usefulness of thorough DNA documentations, gene databases, and other overtly available genomic resources to hasten the rapidity of contemporary science.</p>
<p>In the later portion of the year 1990, DNA samples from agreeable patients with genetic defects, which seem to be instigated by chromosome reorganization known as balanced translocations. It follows that in the course of the normal cycle, two chromosomes glued together, split, and develop once more wrongly together with the parts of every chromosome that have swapped positions. The researchers have made a scientific guess that the translocation breaks a gene included in the growth procedure, which cause the gene to be dysfunctional and forms an evident genetic defect. In conjecture, the translocation may possibly show the way to a biologically useful gene. The test is to confirm that the conjecture and the truth are the exactly the same.</p>
<p>The researchers have discovered that the broken gene in the DNA specimen of the patient with programmed SUMO1, which is a tiny protein that is identified to connect to the rear portion of newly created proteins to alter their purpose. In order to establish whether SUMO1 was really a clefting gene, the researchers performed an experiment to a mouse. The SUMO1 is extracted in the area of the forming mouse where the palate develops and gene inactivation has been performed. The partially inactivated SUMO1 was implanted into the female mice. It resulted to the birthing of forty six newborn mice that had clefts of the palate or face. Such occurrence is what has been commonly observed with the human families that have a lineage of cleft lip and palate. Clefting mirrors the acts of multiple gene products. It is extraordinary to be a product of a single gene and its protein. The researchers aimed to define better the conditions that were observed in the event of cleft lip and palate.</p>
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		<title>Researchers Report New Gene Test for Isolated Cleft Lip and Palate</title>
		<link>http://biologylabexperiments.com/article-review/researchers-report-new-gene-test-for-isolated-cleft-lip-and-palate/</link>
		<comments>http://biologylabexperiments.com/article-review/researchers-report-new-gene-test-for-isolated-cleft-lip-and-palate/#comments</comments>
		<pubDate>Sat, 06 Sep 2008 06:56:56 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Article Review]]></category>

		<guid isPermaLink="false">http://biologylabexperiments.com/?p=19</guid>
		<description><![CDATA[Researchers give an account that they may possibly envisage whether particular parents are additionally inclined as compared with others to bear a second offspring having an isolated kind of cleft lip and palate, which is one of the commonest genetic abnormalities all over the world based from the New England Journal of Medicine. The research [...]]]></description>
			<content:encoded><![CDATA[<p>Researchers give an account that they may possibly envisage whether particular parents are additionally inclined as compared with others to bear a second offspring having an isolated kind of cleft lip and palate, which is one of the commonest genetic abnormalities all over the world based from the New England Journal of Medicine. The research study was sponsored partially by the National Institute of Dental and Craniofacial Research and the National Institute of Environmental Health Sciences, which is a sector of the National Institutes for Health.<span id="more-19"></span><br />
The researchers revealed that their most recent gene experiment operates to approximately twelve percent of isolated cleft lip and palate, or newborns with clefts alone and without other genetic defects.  The researchers and their contemporaries have previously issued a statement saying that mutations in another gene covered approximately two percent of every case of isolated clefts. It follows that researchers in the field may possibly screen jointly an approximately fifteen percent of isolated cleft lip and palate, which was formerly not possible. Isolated clefts made up the seventy percent of the entire cleft lip and palate.</p>
<p>In the recent study, the scientists revealed an alleged haplotype gene test, which is the first of its kind in medicine.  A haplotype is the total of some chronic disparities in the common DNA series of species that are spaced out just like the signposts, alongside a chromosome or gene.  In such situation, they discovered that unique grouping of sequence alterations in and surrounding the gene IRF6 interrelated with an amplified opportunity that a child may perhaps be born with a cleft.  IRF6, which instructs a protein that activates the gene. The protein is called as transcription factor, which performs a part in the course of the normal development of the palate, lips, skin, and genitalia.</p>
<p>This research study revealed that the researchers have attained a moment where it is probable possible to take blood specimens from parents, test the particular genes, and ascertain whether their chance for a second child with cleft lip or palate is one or twenty percent. Today is the time to start considering how to make use of these kinds of tests clinically and guarantee the beneficial effects to the families and their children.</p>
<p>According to one scientist, approximately one in all six hundred newborns in America is born having the isolated, also known as non-syndromic cleft lip and palate.  Although the situation can be commonly corrected through a number of surgical operations, families experience enormous emotional and economic difficulties in the course of the procedure, and children frequently need lots of other services, consisting of complicated dental care and speech therapy. Isolated clefts occur during fetal formation from a dynamic and still poorly comprehended interaction of genes, diet, and ecological factors. Recent research devices cannot sufficiently incise through the intricacy. At the moment, the researchers moved backward and looked more widely at the gene and flanking areas of the chromosome. The researchers said that the mutation that triggers the cleft continues to be unknown</p>
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		<title>Designer Mice Offer New Look at Old Scourge: Osteoporosis</title>
		<link>http://biologylabexperiments.com/article-review/designer-mice-offer-new-look-at-old-scourge-osteoporosis/</link>
		<comments>http://biologylabexperiments.com/article-review/designer-mice-offer-new-look-at-old-scourge-osteoporosis/#comments</comments>
		<pubDate>Sat, 06 Sep 2008 06:54:17 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Article Review]]></category>

		<guid isPermaLink="false">http://biologylabexperiments.com/?p=17</guid>
		<description><![CDATA[Scientists at National Institute for Dental and Craniofacial Research have generated genetically maneuvered mice that imitate most of the signs of human osteoporosis. The mice are lacking the gene that codes for a bone protein known as biglycan. The animals develop lower number of bones than their normal complements and finally form the bone pathology, [...]]]></description>
			<content:encoded><![CDATA[<p>Scientists at National Institute for Dental and Craniofacial Research have generated genetically maneuvered mice that imitate most of the signs of human osteoporosis. The mice are lacking the gene that codes for a bone protein known as biglycan. The animals develop lower number of bones than their normal complements and finally form the bone pathology, which is comparable to that perceived in osteoporosis patients.<span id="more-17"></span><br />
The animal representation is important in two reasons. First it recognizes a gene that may possibly be a hazard aspect for forming osteoporosis, and it offers a novel trial base for possible osteoporosis remedies. Osteoporosis is an illness manifested by continuing bone damage and it inflicts approximately twenty five million Americans in which eighty percent of whom are females. Post-menopausal women are specifically vulnerable due to reduced estrogen levels that accelerate bone loss. Scientists, for so many years, have been looking for genes that may possibly recognize people at high risk for acquiring osteoporosis. The genes that manage bone mass, which is a gauge of the density and size of skeletal bone, have been primary focus points of the search. Bone is an active tissue where mass is an indication of the equilibrium among bone development and resorption. In humans, bone mass attains a pinnacle at approximately age thirty subsequent to bone loss supersedes bone gain. Less peak bone mass is deemed to be a primary risk aspect for forming osteoporosis.</p>
<p>The procedures that ascertain peak bone mass are not fully comprehended. Even though a mineralized tissue, bone forms from a protein frame, or matrix that provides as the site of mineral accumulation. In the research study, the researchers concentrated on biglycan, a kind of matrix protein called as a proteoglycan. The scientists made possibly to make known the involvement of biglycan by using molecular technology to get rid of the mouse biglycan gene. They generated a mouse strain that was incapable to produce biglycan. Initially the mice formed normally, however as they aged, their bones fall short to presuppose the mass and strength monitored in normal mice. Examinations demonstrated that the variances were because of reduced bone development rather than amplified bone loss.</p>
<p>In animal research studies that have knocked out different matrix proteoglycans, bone mass was not inflicted and in one case really amplified. Initially the matrix proteoglycan has been made known to be essential for forming peak bone mass. In the absence of the biglycan gene, the animals formed age-related bone deformities that nearly imitated osteoporosis. It is perceivable that single differences in the human biglycan gene may possibly affect bone mass and thus be a contributing factor in the formation of osteoporosis. The connection among biglycan and bone mass could give a novel opportunity for curing osteoporosis. Recent remedies, involving estrogen substitution, deal with sluggish rate of bone loss. The scientists believe that the animal model can be a helpful device for knowing how biglycan aids in the building of bone mass, and for testing novel remedies that can replicate the procedure.</p>
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		<title>Aflatoxin Awareness Helps Prevent Future Problems</title>
		<link>http://biologylabexperiments.com/article-review/aflatoxin-awareness-helps-prevent-future-problems/</link>
		<comments>http://biologylabexperiments.com/article-review/aflatoxin-awareness-helps-prevent-future-problems/#comments</comments>
		<pubDate>Sat, 06 Sep 2008 06:53:09 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Article Review]]></category>

		<guid isPermaLink="false">http://biologylabexperiments.com/?p=15</guid>
		<description><![CDATA[A plant pathologist noted that the livestock feeding industry is in the lookout for high aflatoxin concentrations in imported grain. Mycotoxin was described as a group of very toxic substances.  It is known to be caused by common fungi or molds that grow on the grain, feed or food in the field.  These mycotoxins can [...]]]></description>
			<content:encoded><![CDATA[<p>A plant pathologist noted that the livestock feeding industry is in the lookout for high aflatoxin concentrations in imported grain. Mycotoxin was described as a group of very toxic substances.  It is known to be caused by common fungi or molds that grow on the grain, feed or food in the field.  These mycotoxins can be categorized into two groups.  The first one is known as aflatoxin.  Aflatoxins are commonly associated with corn, peanuts and cotton.  The second one is referred to as fumonisins.  Fumonisins are usually associated with corn and wheat. There are factors to be considered in the occurrence of the aflatoxin and fumonisin toxins.  Environmental conditions like drought, insect damage and crop injury affects the occurrence of these toxins.<span id="more-15"></span></p>
<p>The article stressed that fumonisin contaminated grain is showing up in South Texas corn crop.  It should be noted that fumonisin is deadly to horses. This toxin may not have visible mold.  However it can be detected by a starburst pattern on the kernel.It should be noted that these fungi exist in the soils. A change in humidity would allow them to germinate under peak conditions.  Grain elevator operators as well as producers are encouraged to keep a closer look for grain contamination.  It is necessary to conduct random sampling of the grains.  This is to prevent cross contamination within the grain bins.</p>
<p>It was mentioned in the article that one of the concerns of the people is aflatoxin since massive amounts of corn are shipped into confined animal feeding industry including beef, swine and dairy cattle.  Statistics indicated that there are seven million of beef cattle, three point five million of rower hogs and two hundred thousand of sows and a growing diary industry.  It is advantageous to be always on the look out. Aflatoxins may be present in corn, peanuts and cotton seed.  People involved in the dairy industry should be careful since there is no tolerance for aflatoxin in milk.  Even a small trace of aflatoxin can mean that the whole batch of milk has to be discarded.  Aflatoxicosis is a condition caused by the consumption of aflatoxin in younger animals, even in low to moderate levels. In the case of cattle, it can develop liver and kidney damage, depression of the immune system, reduction of weight and liver abscesses.  If this happens, the entire carcass has to be condemned.</p>
<p>It was even highlighted that even human beings are not immune to the effects of the mycotoxin. Studies conducted revealed that if great amounts are inhaled daily, humans can develop a farmer’s lung  as well as skin irritations, fever, wheezing, breathlessness, cough and ulcers.It is therefore necessary to prevent aflatoxin problems.  The grain going into storage must be dried to thirteen percent moisture.  Operators should be conscientious about storing procedures. The practice of putting the damaged corn on top of the good corn can contaminate the whole batch. If high moisture grain is not properly handled, there is a tendency for aflatoxin levels to escalate in a matter of few hours. Contaminated grain with one thousand parts per billion or more should be destroyed. Otherwise the grain can be screened and possibly blended with less contaminated corn. The corn cannot have greater than five hundred parts per billion of aflatoxin to qualify for blending.</p>
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		<title>Poplar Tree Genome Holds Promise of Breakthrough in Bio Fuel Research</title>
		<link>http://biologylabexperiments.com/article-review/poplar-tree-genome-holds-promise-of-breakthrough-in-bio-fuel-research/</link>
		<comments>http://biologylabexperiments.com/article-review/poplar-tree-genome-holds-promise-of-breakthrough-in-bio-fuel-research/#comments</comments>
		<pubDate>Sat, 06 Sep 2008 06:50:04 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Article Review]]></category>

		<guid isPermaLink="false">http://biologylabexperiments.com/?p=13</guid>
		<description><![CDATA[The article discussed the importance of North American black cottonwood; Populus trichocarpa, being a prevalent topic of mercantile and environmental studies, was chosen as the first woody perennial plant to have its DNA sequence decoded by the DOE Joint Genome Institute because of its relatively compact genome, making it an ideal model system for trees. [...]]]></description>
			<content:encoded><![CDATA[<p>The article discussed the importance of North American black cottonwood; Populus trichocarpa, being a prevalent topic of mercantile and environmental studies, was chosen as the first woody perennial plant to have its DNA sequence decoded by the DOE Joint Genome Institute because of its relatively compact genome, making it an ideal model system for trees. The article highlighted the examination of the first fulfilled DNA sequence of a black cottonwood tree that may set the foundation in using trees as a source of modern genre of biofuels such as cellulosic ethanol. The study is the outcome of four years of scientific and technical hard work under the leadership of the U.S. Department of Energy Joint Genome Institute or DOE JGI and Oak Ridge National Laboratory or ORNL and connecting the labors of thirty four institutions all over the world.<span id="more-13"></span></p>
<p>Biofuels may possibly offer a foremost solution to the ever-increasing energy requirements of a country such as the US by providing an ecologically welcoming substitute to imported oil. Alteration of plants for biofuels generation is one of the secrets to creating biofuels cost-effectively doable. This study, with the use of the latest genomic technologies, is an essential move towards emergent, realistic, biologically-based alternatives for gasoline and other fossil fuels. Biofuels are not only appealing for their promise to cut dependence on oil imports but also their decreased ecological influence. Biofuels give off less noxious wastes than fossil fuels such as gasoline. Moreover, poplar and associated plants are important managers of atmospheric carbon. Trees collect acquired carbon dioxide in their branches, leaves, stems, and roots. This inherent and natural course gives possibilities to enhance carbon elimination from the air by generating trees that successfully take and stock extra carbon underground in their roots and the soil. Further, bioenergy crops absorb again the carbon dioxide expelled when biofuels are used up, producing a cycle that is significantly carbon neutral.</p>
<p>Under best possible environment, poplars can add up a dozen feet of growth every year and achieve maturity in as few as four years allowing careful breeding for extensive sustainable plantation forestry. Such fast development together with alteration of the lignocellulosic part of the plant to ethanol has the capability to offer a renewable energy resource together with the decrease of greenhouse gases.<br />
As compared to gasoline, ethanol from cellulosic biomass could spectacularly trim down secretions of the greenhouse gas carbon dioxide. Whereas burning gasoline and other fossil fuels intensifies atmospheric carbon dioxide concentrations, the photosynthetic generation of new biomass absorbs most of the carbon dioxide emitted when bioethanol is burned. The article also discussed the discovery of protein-coding genes that are very important in the biofuel evolution.</p>
<p>Poplar is the uttermost complicated genome to be sequenced and collected by a single public sequencing facility and is the third plant at the moment to have its genome fully sequenced and published.<br />
The research into biofuels is concentrating on both plants and microbes in the attempt to find new biotechnology-based techniques of generating fuels from plant matter or biomass economically. Scientists foresee a future in which huge poplar farms could offer and supply steady quantity of tree biomass rich in cellulose that can be converted through specialized biorefineries into fuels like ethanol. There might also be a possibility that large amounts of biofuels can be generated from agricultural and forestry waste. <a href="https://publicaffairs.llnl.gov/news/news_releases/2006/NR-06-09-05p.html">Here is a link to the article</a></p>
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		<title>Watch Molds Grow</title>
		<link>http://biologylabexperiments.com/biology-lab-experiments/watch-molds-grow/</link>
		<comments>http://biologylabexperiments.com/biology-lab-experiments/watch-molds-grow/#comments</comments>
		<pubDate>Sat, 06 Sep 2008 06:45:31 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Biology Lab Experiments]]></category>

		<guid isPermaLink="false">http://biologylabexperiments.com/?p=11</guid>
		<description><![CDATA[A mold is the term used for all microscopic fungi that grow in the form of multicellular filaments, called hyphae. Hyphae are the main mode of vegetative growth in fungus. However, fungi that grow as single cells are called yeasts. This experiment enables the children see and learn in what conditions the molds grow in [...]]]></description>
			<content:encoded><![CDATA[<p>A mold is the term used for all microscopic fungi that grow in the form of multicellular filaments, called hyphae. Hyphae are the main mode of vegetative growth in fungus. However, fungi that grow as single cells are called yeasts. This experiment enables the children see and learn in what conditions the molds grow in best. In this experiment, we need 4 slices of bread, water, any airtight covering, magnifying glass, a notebook and 1 to 2 weeks experiment time.<span id="more-11"></span></p>
<p>Procedures</p>
<p>Sample 1</p>
<p>Get a piece of bread that is a few days old but make sure that it is not stale. Cut the bread in half. Expose the first half in the air while seal the other half in an airtight container.</p>
<p>Sample 2</p>
<p>Get another piece of bread and cut it in half. Place one half in the dark, like inside a paper bag or a cupboard. Leave the other half in strong light. A place where the sunlight hits directly is the best.</p>
<p>Sample 3</p>
<p>Take the third piece of bread and again, slice it in half. Make sure that the first half is very dry while we the other half with approximately one half teaspoon of water. Do not forget to spritz the wet bread with water each day.</p>
<p>Sample 4</p>
<p>Take the last piece of bread for this experiment. Cut it again and leave the first half in a place that is warm and dark. You can place it inside a paper bag and leave it on top of the refrigerator as the top gets warm. As for the other half, find a place that is cold and dark. So, put the bread in a paper bag and leave it inside the refrigerator.</p>
<p>Examine the samples everyday. In the first few days, it is advisable that you use a magnifying glass to clearly see the action of the fungi on the bread.<br />
What Happened</p>
<p>Molds will certainly develop in all the pieces of bread. It is only the how and where the bread is stored that affects the length of time that the molds will appear. Molds love to thrive in warm, dark and moist areas.</p>
<p>Let us now examine what happened to all our bread samples. In sample 1, the bread exposed in the air acquired molds quickly than the one in the airtight container. In sample 2, the bread kept inside the paper bag developed molds quickly than the one in left in direct sunlight. Sample 3 had one moist bread and one dry bread. The dry bread developed molds slower than the moist one. And as for the last sample that had one half of the bread left in a dark and warm place while the other half in a dark and cold place, the one on top of the refrigerator developed molds quickly than the one inside the refrigerator. Through this, we have learned how and where to safely store our food to delay the development of molds.</p>
<p>Take the experiment a step further by experimenting with other kinds of food. Be very careful in doing this experiment, though. Some people may be allergic to molds. Please take the necessary precautions. And always remember to write down your observations in your notebook.</p>
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		<title>Yogurt the Yummy Bacteria</title>
		<link>http://biologylabexperiments.com/biology-lab-experiments/yogurt-the-yummy-bacteria/</link>
		<comments>http://biologylabexperiments.com/biology-lab-experiments/yogurt-the-yummy-bacteria/#comments</comments>
		<pubDate>Sat, 06 Sep 2008 06:42:55 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Biology Lab Experiments]]></category>

		<guid isPermaLink="false">http://biologylabexperiments.com/?p=9</guid>
		<description><![CDATA[Most people associate bacteria with diseases and illnesses. But there are other kinds of bacteria that are helpful to humans and one of these is yogurt. Yes, yogurt is made from bacteria, specifically the Lactobacillus bulgaricus. This bacterium is actually only one of the several bacteria used in making yogurt. How is it helpful to [...]]]></description>
			<content:encoded><![CDATA[<p>Most people associate bacteria with diseases and illnesses. But there are other kinds of bacteria that are helpful to humans and one of these is yogurt. Yes, yogurt is made from bacteria, specifically the Lactobacillus bulgaricus. This bacterium is actually only one of the several bacteria used in making yogurt.</p>
<p>How is it helpful to people, you ask. The bacterium feeds on milk and produces lactic acid. Lactic acid also helps preserve the milk. It then breaks down lactose. This is most helpful to people who are lactose intolerant because their digestive systems lack the enzyme to break down lactose to simple sugars. While fermenting milk, Lactobacillus bulgaricus produces a chemical known as acetaldehyde, which gives yogurt is yummy. Now, let us try making a batch of these helpful and yummy bacteria at home.<span id="more-9"></span></p>
<p>First, you need a starter. This can be bought at the grocery or at the health stores. If you can not find one, a cup of plain, unflavored yogurt can also be used as long as it has live cultures in it. The labels will tell you if there are live cultures in it or not. So read the labels before buying and save yourself the trip of going back to the store to exchange the product.</p>
<p>Next, heat up four cups of milk until hot but do not let it boil. Make sure the temperature is only between 95-120 degrees, just enough to kill some of the harmful bacteria present in milk. After which, let it cool down slightly before adding the live yogurt or starter.</p>
<p>Put the mixture in a sterilized jar or container and cover it. To sterilize a container, run them through dishwasher or wash it with very hot water.<br />
After doing this, you are now all set to culture your homemade yogurt mixture. See, there are two ways in culturing yogurt mixture. You can either place the covered container in a clean plastic cooler and fill with hot water until it reaches just below the top of the containers or wrap the container in a heating pad and towels and set the heating pad on low to medium heat. On the first method, you need to constantly refill the cooler with hot water to ensure the temperature of the yogurt stays consistent. It is very important to keep the temperature consistent.</p>
<p>Heat the mixture and check it after about 3 1/2 to 4 hours. By this time, the mixture should have set-up. It means that it has a smooth, creamy consistency similar to a store-bought yogurt. If it still has not set-up, heat it again for 1-2 hours. You can then add your own flavoring, like vanilla, chocolate and you can even add your favorite fruits. After doing so, store in the refrigerator. It should keep for a couple of weeks. Now, you are ready to enjoy the fruits of your labor. A word of caution though, do not eat yogurt that has separated or has changed its consistency.</p>
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		<title>Grow Your Own Bacteria</title>
		<link>http://biologylabexperiments.com/biology-lab-experiments/grow-your-own-bacteria/</link>
		<comments>http://biologylabexperiments.com/biology-lab-experiments/grow-your-own-bacteria/#comments</comments>
		<pubDate>Sat, 06 Sep 2008 06:36:57 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Biology Lab Experiments]]></category>

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		<description><![CDATA[We always hear our mothers telling us to wash our hands with soap and warm water to kill the germs. Let us find out how true this statement is. For this experiment, we need one 4 inch sized Petri dish, water, 5 grams of agar nutrient, container to boil water, plastic wrap, cotton swab and [...]]]></description>
			<content:encoded><![CDATA[<p>We always hear our mothers telling us to wash our hands with soap and warm water to kill the germs. Let us find out how true this statement is.</p>
<p>For this experiment, we need one 4 inch sized Petri dish, water, 5 grams of agar nutrient, container to boil water, plastic wrap, cotton swab and hand sanitizer.</p>
<p>Step 1</p>
<p>In a container, mix half a teaspoon of agar and a quarter cup of hot water and stir. Bring this mixture to a boil for one minute to completely dissolve the agar. In using the microwave to boil the mixture, be careful not to let it boil over. Be sure that the mixture is clear with no floating particles. Allow the mixture to cool for 3 to 5 minutes.<span id="more-7"></span></p>
<p>Step 2</p>
<p>With an adult, carefully pour the solution into both halves of the Petri dish. Get the plastic wrap and loosely cover each Petri dish and leave it to cool and harden for at least an hour.</p>
<p>Step 3</p>
<p>The fun part begins. Collect some bacteria using a cotton swab. This is usually done by rolling a cotton swab in your mouth and lightly rubbing the contaminated end on the gelled agar.</p>
<p>Step 4</p>
<p>Remember you have poured the agar solution into each halve of the Petri dish. That means you have two places to grow your bacteria. Since the first half is tested with a sample from the inside of your mouth, you might want to a sample from other things such as the remote control or the computer keyboard. Or you can skip the mouth test and use other things instead. To get good samples, dampen the end of the cotton swab with water and wipe the end of the swab all over the surface to fully cover the swab with invisible bacteria.</p>
<p>Step 5</p>
<p>After colleting your samples, pull the plastic wrap away from the Petri dish and lightly draw a squiggly line with the end of the swab. Cover the Petri dish again and label the dish with the name of the tested item using a piece of paper taped on top. Place the Petri dish in a safe, dark place to allow the bacteria to grow.</p>
<p>Step 6</p>
<p>On the other Petri dish, do this. Try dropping hand sanitizing gel in the middle of your squiggles. It is said that the antibacterial chemical in hand sanitizers prevent bacteria from growing.</p>
<p>Step 7</p>
<p>Cover the Petri dish again and label it with the name of the tested item using a piece of paper or tape. Place it in a warm dark place. In a few days, varieties of bacteria, molds and fungi can be seen. They will keep growing larger as days go by but there will be no growth on the spots where the disinfectants are. These are called kill zones. Then you can start another experiment on which brand of disinfectant work best.<br />
Safety Measures</p>
<p>It seems that our mothers are right. Remember, bacteria collected in the environment are not harmful. But when grown in Petri dishes and have multiplied, then they can be a hazard. Protect open cuts by using rubber gloves and never ingest or inhale growing bacteria. Keep the Petri dish closed until the end of the experiment. After the experiment, dispose of them by using bleach.</p>
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		<title>Dissecting Flowers</title>
		<link>http://biologylabexperiments.com/biology-lab-experiments/dissecting-flowers/</link>
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		<pubDate>Sat, 06 Sep 2008 06:36:17 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Biology Lab Experiments]]></category>

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		<description><![CDATA[Dissecting a flower is a good way to learn about the reproductive parts of a plant. For this project, any flower with large parts is the best specimen. You may use flowers found in your garden or you can ask a local florist for free discarded flowers. A scalpel or any sharp knife is needed [...]]]></description>
			<content:encoded><![CDATA[<p>Dissecting a flower is a good way to learn about the reproductive parts of a plant. For this project, any flower with large parts is the best specimen. You may use flowers found in your garden or you can ask a local florist for free discarded flowers. A scalpel or any sharp knife is needed to cut open the flower, a microscope or a magnifying glass to view the smaller parts of the flower and a handy notebook where you can jot down your observations. Always remember to have an adult supervise the experiment when dealing with sharp objects.<br />
First, identify the main outside parts of the flower. The smooth, leaf like projections under the petals are called sepals. There are male and female flowers. The male flowers consist of the stamen, filament and anther. The stamen is the male organ of the flower, and there are usually multiple stamens on a flower. Next is the filament or the long stalk of the stamen. The anther is the one that holds the pollen and is found at the top of the filament.</p>
<p>Let us examine the female flower. It consists of the pistil, stigma, style and ovary. The pistil is the female part of the flower. The stigma, which is found at the top of the pistil, is the one that collects the pollen and carries it down to the style or the hollow body of the flower. The pollen is then brought to the ovary where it fertilizes the eggs of the flower.</p>
<p>It is possible to have a flower that has all male parts and all female parts. They are called imperfect flowers. But those that have both male and female parts are called perfect flowers.<br />
Step 1</p>
<p>First thing you have to do in this dissection is to remove the sepals and the petals. Pull them down toward the stem. Using the microscope, examine the tip of the petal. You may use the magnifying glass if a microscope is unavailable. Focus on the texture of the petal. Write it down on your notebook.</p>
<p>Step 2</p>
<p>Remove the stamens of the flower. You may cut or break them off the stem. Again, examine it under your microscope or magnifying glass. Draw the shape of the pollen. Sometimes, a part of a flower may be accidentally broken off and you cannot examine all the parts. Should this happen, use another flower.</p>
<p>Step 3</p>
<p>After studying the pollen, remove all parts using your scalpel, knife or your fingers if possible until only the pistil remains alone in the stem. Again, using the scalpel or knife, carefully cut the pistil in half lengthwise. Make sure your fingers are out of the way. Under the microscope, you should see a long hollow tube, or the style. In the ovary, you even be able to see tiny eggs or ovules.<span id="more-5"></span></p>
<p>Take this experiment a little further by looking for a bud of the same flower you are dissecting and compare its parts to the fully opened flower. You can also use different flowers for comparison. Do not forget to write down your observations.</p>
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		<title>Changing the Color of Flowers</title>
		<link>http://biologylabexperiments.com/biology-lab-experiments/changing-the-color-of-flowers/</link>
		<comments>http://biologylabexperiments.com/biology-lab-experiments/changing-the-color-of-flowers/#comments</comments>
		<pubDate>Sat, 06 Sep 2008 06:20:53 +0000</pubDate>
		<dc:creator>admin</dc:creator>
				<category><![CDATA[Biology Lab Experiments]]></category>

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		<description><![CDATA[In this experiment, the children will realize how vital the roles of the roots and the stems are to the plants. The materials needed are 6 white carnations, 6 plastic cups, food coloring, knife and water. Step 1 Fill the cups half full with water and add 20 to 30 drops of food coloring in [...]]]></description>
			<content:encoded><![CDATA[<p>In this experiment, the children will realize how vital the roles of the roots and the stems are to the plants.</p>
<p>The materials needed are 6 white carnations, 6 plastic cups, food coloring, knife and water.</p>
<p>Step 1</p>
<p>Fill the cups half full with water and add 20 to 30 drops of food coloring in each cup. Use different color for each cup. You can choose any color you like. This time the more food color used the better.<span id="more-3"></span></p>
<p>Step 2</p>
<p>Ask an adult to help you trim the stem of each flower to make a fresh cut. In the case of cut flowers, it is very important for the stem tubes to be filled with water. The reason is this, no water can move up if the stem tubes are filled with air. What most gardeners and florists do is, they cut the stems under water to prevent the air bubbles from getting in to break the tube of water causing the lovely flowers to wilt faster than they would.</p>
<p>Step 3</p>
<p>Now, it is time to place the freshly cut white carnations in the cups of colored water. One carnation for one cup of colored water. But, save the two other carnations for the next step. You can make predictions as to which color will be soaked up next and how long will it take to do it.</p>
<p>Step 4</p>
<p>Ask an adult to help you with the handling of the knife as you slit the stem straight from the middle downwards. Take one half of the stem and place it in colored water and the other half on different colored water. This trick is called Split Ends. Again, you can make predictions as to which colors will be soaked up first or will the two colors mix to create another color. Always remember to keep the ends of the stem wet and make fresh cut on the ends.</p>
<p>Step 5</p>
<p>Try checking back every now and then to see how your plants are progressing. Sometimes, it may take up as much as 24 hours for the colored water to reach the white petals. At the end of your experiment, do not forget to examine all the parts of the plant like the stems, buds, leaves and petals to find every trace of color.<br />
In this experiment, it has been noticed that plants get their nutrients from the water using their roots drink the water then it travels to the stem into the leaves and flowers where it makes their food. In this case, even when there are no roots, the stem is still drinking the water to provide it for the leaves and flowers.</p>
<p>Putting food color in the water of the plants does not harm them. But like colored dyes, chemicals that pollute the waters can get into the soil and ground water, contaminating our vegetables and plants. Some pollutants and chemicals, just like the colored, may even travel up the plant and affect the way the plant grows.</p>
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