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Tag: "during" at biology news

New push for public health, AIDS spending at African Union summit

...thcare in the four years since the goal was stated during the founding of the pan-African body. The rest of the 52 countries included in the African Union spend less than 10 per cent of their annual revenues on health, anti-AIDS and anti-HIV efforts included. Controversial drug trials, battles over patent...

Molecular biology fills gaps in knowledge of bat evolution

...ruit-eating bats from the tropics, that fly mostly during the day - known to biologists as megabats - emerge...tion - originated about 52 to 50 million years ago during a lush period of significant global warming in a region that is now North America. This latest rese...

Spleen may be source of versatile stem cells

...ce aprotein previously believed to be present only during the embryonicdevelopment of mammals.The finding both supports the existence of these splenic stem cells andalso suggests they may be able to produce an even greater variety oftissues. The report appears in the January 19 issue of SAGE KE , an online...

UCSB scientists probe sea floor venting to gain understanding of early life on Earth

...st remarkable scientific findings in Earth science during the latter half of the twentieth century, and have...scarps) created by vertical uplift of the seafloor during many events of fault slippage that produce frequent earthquakes. The scarps are cliffs that expose a...

Researchers discover way to make cells in the eye sensitive to light

...em, which uses melanopsin, that haslain undetected during decades of vigorous scientific investigation."Professor Hankins and Dr Lucas were part of the team who previouslydiscovered a new light detection system in the eye, totally independentof the rods and cones, which were thought to be the only systemspr...

Quantum Dots Research Leads to New Knowledge about Protein Binding in Plants

...teraction betweenthe pollen tube and female tissue during reproduction.“Integrating materials science, chemistry and plant biology tounderstand how and where specific proteins act on a pollen tube is onemore step towards a better understanding of the fundamental processesinvolved, namely the network of the ...

Source of molecular triggers in cutaneous T cell lymphoma identified

...pre-programmed to respond to self-antigens exposed during normal cell death. As cells undergo the process of apoptosis, cryptic -- or masked -- antigens, are uncovered. Those newly available antigens are presented by LC directly to CTCL receptors, stimulating the malignant cells rapidly divide. "This findi...

Yellowstone microbes fueled by hydrogen, according to U. of Colorado study

...geothermal vents indifferent parts of the park and during different seasons. All of theenvironments had concentrations appropriate for energy metabolism.The team used computer-generated thermodynamic models to find out ifhydrogen was indeed the principle source of energy. "You can smellsulfide in the air at...

Growth in the sea comes down to a struggle for iron

...hat natural increases in iron inputs to the oceans during the geologic past may have removed enough carbon from the atmosphere to affect global climate, perhaps even contributing to the onset of ice ages. Martin died in 1993 just as tests of his ideas were getting underway, but scientists have embarked on a...

Poor prenatal nutrition permanently damages function of insulin-producing cells in the pancreas

... The control group ate as much chow as they wanted during the entire pregnancy. The other group also was fully nourished during the first two weeks but undernourished during the third week, restricted to only half the amount. It...

Emory Study Tests Bone Marrow Stem Cells to Improve Circulation in Legs

...d blood flow to the muscles ofthe legs, especially during exercise, which causes pain, aching,cramping or fa...s in the volunteers' blood will be measuredbefore, during and after administration of the drug or placebo. Thestudy is randomized and blinded, which means tha...

Current human embryonic stem cell lines contaminated UCSD/Salk team finds

...nd his team noted that many efforts have been made during thelast few years to try to eliminate any animal-derived culturecomponents in human stem cell culture. However, many of the specializedmedia used for growth and differentiation still contain materials fromanimal sources and are hence contaminated wit...

UW's Rosetta software to unlock secrets of many human proteins

...ovolunteer their personal computers to run Rosetta during periods ofcomputer downtime.The information will be entered into a publicly accessible database,which scientists can then use to conduct research into new drugs andtreatments.Rosetta works by virtually folding protein sequences into thousands ofpossi...

Researchers find how protein allows insects to detect and respond to pheromones

...ovolunteer their personal computers to run Rosetta during periods ofcomputer downtime.The information will be entered into a publicly accessible database,which scientists can then use to conduct research into new drugs andtreatments.Rosetta works by virtually folding protein sequences into thousands ofpossi...

Bacteria collection sheds light on urinary tract infections

...women will experience at least one episode of UTIs during their lifetime. UTIs are typically treated with antibiotics. The researchers found that the E.coli causing the UTIs matched genetically with a sample of E.coli obtained from an animal source. They used E.coli samples collected over 40 years from the...

Bound for destruction: Ubiquitination protects against improper Notch signaling

...d Dx viewith each other to regulate Notch activity during endocytosis, and thatNedd4 actually destabilizes Dx in the presence of Notch. Thiscompetition between two ubiquitin ligases to permit or suppressactivation of a signaling pathway represents a neat solution to theproblem confronting cells of how to pr...

Research on Worms Yields Clues on Aging

...f fast body movement and fastpumping of mouthparts during the latter phase of their extended lives.Further tests showed that the anticonvulsants stimulated transmissionof signals in nerves that control body movement.Scientists previously had found genetic mutations in C. elegans thataffect both the nervous ...

U-M scientist to talk about tissue engineering at AAAS

...s of bone, and encouraging cells to make more BMPs during tissue engineering also can ramp up the effects. "Together these therapies can overcome compromised environments," he said. "Combining therapies can help us overcome some of the complications of current therapies, too." These approaches are not yet...

Iron Deficiency Sparks Dramatic Changes In Gene Expression

...arkinson's disease andcertain cancers and develops during a number of chronic diseases, theresearchers said.Until now, however, a cell's response to iron deprivation was poorlyunderstood. In the Duke study, Thiele and his Duke colleagues at theSarah W. Stedman Nutrition and Metabolism Center demonstrated th...

Found: Missing sequence of the human Y chromosome

...non whereby largeportions of the genome are copied during evolution. Segmentalduplications, which emerged during the past 30 million years of primateevolution, are significantly enriched in subtelomeric andpericen...

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