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Tag: "many" at biology news

Study investigates 'divorce' among Galapagos seabirds

...ently in or out of the mating game, in contrast to many other animals, she said. A male Nazca booby cast off by a current mate may be selected by a different female the next year, after he has had a chance to regain his condition....

College students who pull 'all-nighters' and get no sleep more likely to have a lower GPA

A common practice among many college students involves "pulling all-nighters", or a single night of total sleep deprivation, a practice associated with lower grade-point averages compared to those who make time for sleep, according to a research abstract that will be presented W...

Could fungal collection hold the key to new life-saving drugs?

...produced by fungi that have been on the market for many years. These include immunosuppressive agents, antibiotics such as penicillin, lipid lowering agents and anti-fungal drugs....

New findings challenge established views on human genome

...unction. “This impressive effort has uncovered many exciting surprises and blazed the way for future e... efforts to identify the DNA sequences involved in many human diseases.” The completion of the Human Genome Project in April 2003 was a major achievemen...

Penn researchers link cell's protein recycling systems

... “We can use fruit flies to rapidly screen through many genes to find the one we’re interested in. In the process of screening, our attention was drawn to HDAC6 because we already knew that it could bind to ubiquitin-tagged proteins and transport them within the cell. So we wondered, could HDAC6 be the l...

Bacteria ferry nanoparticles into cells for early diagnosis, treatment

...ria and nanoparticle material can be selected from many choices, this is a delivery system that can be tailored to the characteristics of the receiving cells. It can deliver diagnostic or therapeutic cargo effectively for a wide range of needs." Harmless strains of bacteria could be used as vehicles, h...

Plastic that grows on trees

...ddition to low yield until now, we always generate many different byproducts,” including levulinic acid, m..., attempts at direct glucose conversion created so many impurities that it was simpler to start with the fructose, less common in nature than glucose. Zh...

454 sequencing identifies HIV drug resistance at early stage

...the current technology used in the clinic may miss many low-level resistant HIV strains which can grow rapidly under drug selection pressure and lead to therapy failure. This retrospective study clearly shows that even resistance mutations present at the 1% level lead to premature failure of therapy” exp...

Exploring the dark matter of the genome

...come apparent that heterochromatin is critical for many essential functions." Advances in sequencing ... "Drosophila is ideal for studying genomics for many reasons, and especially for studying heterochromatin," says Susan Celniker, a scientist in Berkeley ...

University of Pittsburgh School of Medicine researchers develop 'off-the-shelf' vascular grafts

...cted. However, they are in very limited supply, as many patients require multiple grafts. Thus, there is an ongoing search for the ideal small-caliber arterial substitute for revascularization procedures. The University of Pittsburgh team, led by David A. Vorp, Ph.D., associate professor of surgery and...

Cancer stem cells similar to normal stem cells can thwart anti-cancer agents

...resistant, tumor-initiating population of cells in many types of refractory cancers. “Because of the similarities between the way that normal stem cells and cancer stem cells protect themselves, cancer therapies have to be designed specifically to target cancer stem cells while sparing normal stem cells,”...

Warning from Asian bees

...vered for at least three months, it is unknown how many more swarms might exist and how far afield they ma... Already operating under marginal circumstances, many of Australia’s beekeepers can only afford a momentary sigh of relief. Asian bees (Apis cerana) ar...

Potent possibilities for parasite attack

...shmaniasis has identified a small number of genes, many new to biology, that will provide a framework to t...experimental tool in understanding the role of the many genes whose function is unknown, by using experimentally induced RNAi to 'knock-down' gene activity ...

Mutating the entire genome

...how to treat or prevent cancers, says Capecchi. In many cancers, translocation of two chromosomes is the first step, and if it occurs only in one of every million cells, not enough cells are present in which subsequent steps can occur so that cancer develops. “If we now improve that 10,000-fold, the p...

Clot-dissolving agent may be beneficial in treatment of severe frostbite

...ten delayed amputation,” the authors write. “While many other areas of burns, trauma and critical care have advanced significantly in their treatment modalities, the saying ‘Frostbite in January, amputate in July’ is still relevant today.” Kevin J. Bruen, M.D., and colleagues at the University of Utah,...

Potato wart eyed as risk to potato production

While many may be familiar with potato late blight, the plant disease responsible for widespread potato shortages, the lesser known potato wart has the potential to be as devastating to economies that depend on potato production, say plant pathologists with The...

Weizmann Institute scientists develop a general 'control switch' for protein activity

...eins, and in the future the new technique may find many additional uses. The switch has a genetic component and a chemical component: Using genetic engineering, the scientists insert a short segment of amino acids into the amino acid sequence making up the protein. This segment is capable of binding s...

UI anthropologist, colleagues discover remains of earliest giant panda

...ndas. Thus, pandas have been ‘uniquely pandas’ for many millions of years says Ciochon.” Ciochon says that the find further helps establish conditions that existed in the region during the varying climatic conditions of the Pliocene and Pleistocene epochs, stretching back some three millions years befo...

Fat fish put obesity on the hook

...brafish has become a model animal for the study of many diseases because it has a backbone and because its...%. Being overweight or obese increases the risk of many diseases and health conditions, including, but not limited to: hypertension, dyslipidemia, type 2 di...

How 'memory' T cells curb the spread of viruses throughout the body

...n invading virus occurs. After becoming sick from many viruses, the body becomes “immune” (protected) fro...aving a security check point,” said Sigal. “Also, many cancers, like viruses, must pass through lymph nodes to metastasize, so this research may help devel...

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