http://www.physorg.com/ en-us Physorg.com internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. Researchers at Emory University School of Medicine have determined the structures of two enzymes that customize histones, the spool-like proteins around which DNA coils inside the cell. http://www.physorg.com/news180530290.html Biology Sun, 20 Dec 2009 13:00:15 EST news180530290 (PhysOrg.com) -- Tomato plants under attack from the Botrytis fungus give off an aromatic substance that can be measured in greenhouses. This is the result of research performed by Roel Jansen with which he obtained his doctoral degree at Wageningen University on Friday 9 October. Working within a team of scientists from Wageningen and Germany, Jansen has opened the door to a new way of preventing and managing disease and plague problems in greenhouse horticulture. http://www.physorg.com/news175238915.html Biology Tue, 20 Oct 2009 06:40:01 EST news175238915 During cell division, whether hematopoietic stem cells (HSCs) will develop into new stem cells (self-renewal) or differentiate into other blood cells depends on a chemical process called DNA methylation. These were the findings of researchers at the laboratory of Dr. Frank Rosenbauer of the Max Delbrück Center for Molecular Medicine (MDC) Berlin-Buch in cooperation with the laboratory of Professor Sten Eirik W. Jacobsen (Lund University, Sweden and the University of Oxford, England). Furthermore, the researchers showed that DNA methylation also plays a crucial role for cancer stem cells. http://www.physorg.com/news174041736.html Medicine & Health Tue, 06 Oct 2009 10:10:04 EST news174041736 (PhysOrg.com) -- Naturally occurring organic matter in water and sediment appears to play a key role in helping microbes convert tiny particles of mercury in the environment into a form that is dangerous to most living creatures. http://www.physorg.com/news169827722.html Space & Earth Tue, 18 Aug 2009 15:22:45 EST news169827722 A study published in this week's online issue of Nature Biotechnology, demonstrates a unique and highly sensitive method for detecting methylation-associated cancers. http://www.physorg.com/news169650435.html Biology Sun, 16 Aug 2009 14:07:55 EST news169650435 In many types of cancer, parts of the genetic material of tumor cells are switched off by chemical labels called methyl groups. This kind of methyl labeling ranges among the epigenetic changes that do not change the sequence of DNA building blocks. Such labels are found particularly often in genes which act as important inhibitors of pathogenic cell growth. http://www.physorg.com/news168608350.html Medicine & Health Tue, 04 Aug 2009 12:50:01 EST news168608350 Scientists in California are reporting use of a first-of-its-kind approach to craft genetically engineered microbes with the much-sought ability to transform switchgrass, corn cobs, and other organic materials into methyl halides - the raw material for making gasoline and a host of other commercially important products. http://www.physorg.com/news160936277.html Chemistry Thu, 07 May 2009 17:31:58 EST news160936277 Anyone who studied a little genetics in high school has heard of adenine, thymine, guanine and cytosine - the A,T,G and C that make up the DNA code. But those are not the whole story. The rise of epigenetics in the past decade has drawn attention to a fifth nucleotide, 5-methylcytosine (5-mC), that sometimes replaces cytosine in the famous DNA double helix to regulate which genes are expressed. And now there's a sixth. In experiments to be published online Thursday by Science, researchers reveal an additional character in the mammalian DNA code, opening an entirely new front in epigenetic research. http://www.physorg.com/news159111225.html Biology Thu, 16 Apr 2009 14:34:19 EST news159111225 Inflammation, the body's earliest response to damage or infection, can aid the healing process and trigger an immune response against invading pathogens. But inflammation gone awry can also undermine health, as in diseases such as rheumatoid arthritis or asthma. http://www.physorg.com/news155993656.html Biology Wed, 11 Mar 2009 12:35:33 EST news155993656 Root-knot nematodes are extreme parasites. These microscopic, omnipresent worms cause major damage to horticultural and field crops in sub-tropical regions, resulting in significant financial losses to growers and gardeners. http://www.physorg.com/news145715393.html Biology Wed, 12 Nov 2008 12:29:53 EST news145715393 Plants in a forest respond to stress by producing significant amounts of a chemical form of aspirin, scientists have discovered. The finding, by scientists at the National Center for Atmospheric Research (NCAR), opens up new avenues of research into the behavior of plants and their impacts on air quality, and it also has the potential to give farmers an early warning signal about crops that are failing. http://www.physorg.com/news140952482.html Biology Thu, 18 Sep 2008 10:28:02 EST news140952482 Johns Hopkins Kimmel Cancer Center researchers have identified a set of genes in breast and colon cancers with a deadly combination of traditional mutations and "smothered" gene activity that may result in poor outcomes for patients. http://www.physorg.com/news135352761.html Medicine & Health Tue, 15 Jul 2008 14:59:21 EST news135352761 Researchers in New Jersey report discovery of a fast, efficient method for removing a powerful pesticide used to sterilize buildings and equipment following anthrax attacks. http://www.physorg.com/news135256580.html Chemistry Mon, 14 Jul 2008 12:16:20 EST news135256580