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Tag: "are" at biology news

Ants Genetic Engineering Leads To Species Interdependency

... dependent on one another for survival.Female ants are generally found in two forms: reproductive queens ...w Mexico,queens and workers from the same colonies are genetically verydifferent; in both species at the site, only the queens are geneticallyderived from ...

Same mutation aided evolution in many fish species, Stanford study finds

...y colonized new freshwater lakes and streams, they are an ideal model for understanding how animals adapt...h evolved independently from marine ancestors that are covered head to hind fin in body armor. Although it's not clear why losing the armor is a benefit to...

Papers of DNA Pioneer and Nobel Laureate Francis Crick Added to National Library of Medicine’s Profiles in Science Web Site

... officials whose personal and professional records are featured on Profiles. The site is located at www.profiles.nlm.nih.gov. The name of Francis Crick (1916?004) is inextricably linked to the discovery of the double helix of deoxyribonucleic acid (DNA) in 1953, considered the most significant advance i...

Introduced foxes transformed vegetation on Aleutian Islands from lush grasslands to tundra

...s, and the indirect effects on the whole ecosystem are as dramatic as the direct effects on the seabirds. "Introduced species are a global phenomenon, and we tend to focus on the direct effects, such as the reduction or extinction...

Gene Therapy For Parkinson's Disease Moves Forward In Animals

...s good. We now know we can use very low doses that are still effective, so that's good. But we need a safety net. Once we turn it on, it's on for life. So we have to control it, and we're working on this as we speak. But it's not ready for clinical trials.?/p> About a half million Americans struggle ...

Researchers trace evolution to relatively simple genetic changes

...People have been interested in whether a few genes are involved, or whether changes in many different genes are required to produce major changes in wild populations." The answer, based on new research, is that ...

Scientists reveal molecular secrets of the malaria parasite

... the major differences between themalarial species are found in the virulence factors (which are at thechromosome ends) while the "housekeeping" genes are almost totallyunchanged. * Researchers sho...

Octopuses occasionally stroll around on two arms, UC Berkeley biologists report

...People have been interested in whether a few genes are involved, or whether changes in many different genes are required to produce major changes in wild populations." The answer, based on new research, is that ...

Studies reveal methods viruses use to sidestep immune system

... said the tactics employed by HCV to infect a host are likely to be similar to those employed by other RN...tion." Drugs called protease inhibitors currently are used to treat patients infected with HIV and have also shown promise in treating hepatitis C patient...

Development of portable infectious disease detector

...dphysics at Vanderbilt and director of VIIBRE. "We are already makingrapid progress on prototyping portab...aysPria's Chief Technology Officer Jason Pyle. "We are developing a devicethat we hope will allow medical professionals and HIV patients tomanage their dis...

Researchers add new tool to tumor-treatment arsenal

...e failure to blunt the disease. When cancer cells are treated with a DNA-damaging agent, a cancer-suppre...f DNA-damaging agents can be toxic, and doses that are too low allow for DNA repair and further cell growth. Thus, says Dr. Thomas, there is need for drugs...

Why do insects stop 'breathing'? To avoid damage from too much oxygen, say researchers

... punctuate their breathing with periods of closure are (1) such discontinuous breathing reduces water los...dioxide, respiration's byproduct, when the insects are underground. As is true for miners, insects, while underground, are faced with high-carbon-dioxide a...

Scientists discover unique microbe in California's largest lake

...ht to produceoxygen by photosynthesis."While there are some bacteria that can use infrared light forphoto...ygen through photosynthesis, but now we know there are at least threeorganisms that can do this using infrared radiation as well."All three of these organi...

Alcohol's effects on gene expression in the central nervous system

...nique eyes, skin, or hair ?is that only some genes are used or 'turned on' in each cell. This is called g...ne expression in the brain, and that these changes are likely responsible for many of the 'symptoms' of addiction, such as tolerance, physical dependence, ...

Potential Cure for Lymphoma in HIV patients

...ficiency associated with HIV, HIV-positivepatients are more likely to develop lymphoma than HIV-negativei...ell rescue. In anautologous transplant, stem cells are removed from the patient andfrozen for later use. The patient receives high-dose chemotherapy tokill...

Deficiency of growth hormone and IGF-1 reduces cancer and kidney disease, but creates other problems

...e lead investigator. "Things that happen when you are an adolescent may have an impact on how long you l... tests. "The presence of growth hormone and IGF-1 are required for optimal performance on tests of learning and memory throughout life," they said. "Growt...

HIV Infection Still On The Rise

Preventive measures are failing to stem the rising rate of HIV infection, ...ople worldwide, including over 2 million children, are now infected with HIV, and a record 4.8 million became infected in 2003. The underlying reason for ...

MSI releases 'moleculizer' - a new approach to simulation of intracellular biochemical networks

...to generate proteincomplexes and reactions as they are needed, as opposed to generatingall potential comp...tential protein complexes and reactions that cells are able togenerate.The Molecular Sciences Institute is an independent nonprofit researchlaboratory that...

An entropy-based gene selection method for cancer classification using microarray data

...ithm for selecting genes from microarray data that are able to classify various cancer sub-types with high accuracy. In addition, the feature set obtained is very compact, that is, the redundancy between genes is reduced to a large extent. This implies that classifiers can be built with a smaller subset ...

NYC's First Rapid HIV Drug-resistant AIDS Case Prompts Call to Step Up HIV Prevention

... and medical providers and public health officials are being well-advised to work closely together to mon...and poor access to mental health services -- if we are to truly break the chain of infection through effective prevention, testing and treatment efforts." ...

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