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	URL: http://www.pulasthi.info Listed in: Science Category rank: 47 Overall rank: 7160 Tags: science education biotechnolgy medicine pulasthi Join Date: December 10, 2007 Country: Sri Lanka Language: English Google PageRank: 3 Alexa: 276,570 Technorati: Rank: 4,666,062 Authority: 1 Site Description: It's all the about science and technology

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Latest Posts on: Cool Technology Blog
Retrieved latest 5 posts at: http://www.pulasthi.info/feeds/posts/default

Genetically modified organism | 21 Nov 2008
A genetically modified organism (GMO) or genetically engineered organism (GEO) is an organism whose genetic material has been altered using genetic engineering techniques. These techniques are generally known as recombinant DNA technology. With recombinant DNA technology, DNA molecules from different sources are combined in vitro into one molecule (more)

Genetically modified food | 21 Nov 2008
Kenyans examining insect-resistant transgenic BT corn.Genetically modified (GM) foods are foodstuffs produced from genetically modified organisms (GMO) that have had their genome altered through genetic engineering. GM Foods have been available since the 1990s. The most common modified foods are derived from plants: soybean, corn, canola and cotton (more)

Southern, Northern, and Western Blots | 21 Nov 2008
Southern blottingThe Southern blot (named for its inventor) uses gel electrophoresis together with hybridization probes to characterize DNA restriction fragments. Genomic DNA or DNA from a specific source, such as a lambda phage or cosmid clone, is digested, usually to completion, with a restriction endonuclease (or sometimes with two or more restr (more)

Confocal microscopy | 21 Nov 2008
Confocal microscopy is an optical imaging technique used to increase micrograph contrast and/or to reconstruct three-dimensional images by using a spatial pinhole to eliminate out-of-focus light or flare in specimens that are thicker than the focal plane. This technique has been gaining popularity in the scientific and industrial communities. Typic (more)

Interpreting Southern blots | 20 Nov 2008
Matching the positions of the radioactive spots with those of the size standards identifies the sizes of the digestion fragments that hybridize with the probe. For example, a cDNA probe for a gene that contains two internal cut sites for the restriction enzyme will generate three fragments (which will usually have enough size difference so that all (more)

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