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Tag: "months" at biology news

A gene's first 'kiss' sets off that affair known as puberty

...xist at birth, go into hiding at about four to six months of age, then reemerge in full force some 10 to 12 years later? "Puberty is critical to human development. And while there is a fairly good understanding of how the endocrine system regulates the hormones involved, just how and when the brain activat...

DNA Molecules Used To Assemble Nanoparticles

...synthesis process is long and difficult, requiring months for each new molecule added to the dendrimer in se... the traditional way," Baker said. At two to three months per synthesis, and a significant loss of yield for each step, that approach just wouldn't be practic...

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

...But over time, differences began to unfold. When 4 months old (comparable to human adolescence), the low-birth-weight babies began showing higher levels of blood glucose. "By 6 months, these levels had spiked abnormally, to 500 mg/dl -- the equivalent of serious, full-blown diabetes in humans," Dr. Patti sa...

Controversial drug shown to act on brain protein to cut alcohol use

...nking ordrug use when exposed to the drug of abuse months or even years afterbreaking the habit.In this analysis, the researchers provided alcohol to rats until theyhad become "experienced" daily drinkers. They then withheld alcohol fortwo weeks, which normally leads to greatly increased drinking when whena...

The secret lives of whales

...e the first zombie worms were described only a few months ago from one whale skeleton off California, Craig and co-workers have just found another species off Sweden and now think these zombie worms may occur worldwide. Because of their ability to break down lipids in cold water, these animals and their ba...

Researchers reveal the infectious impact of salmon farms on wild salmon

...0 km of migration route; an enormous data set from months of laborious fieldwork; and state of the art models of disease transfer. "Our research shows that the impact of a single farm is far reaching," says lead author Marty Krkosek. "Sea lice production from the farm we studied was four orders of magnitud...

Mouse brain tumors mimic those in human genetic disorder

...s old, developinginto optic pathway gliomas by two months of age. After thattime-period, which is roughly equivalent to teenage years in humans,the cells slowed down to the same growth speed as astrocytes in controlmice."The fact that cell growth is dramatically reduced after a few monthsin mice and after a...

New imaging method gives early indication if brain cancer therapy is effective, U-M study shows

...high mortality rate, with people surviving only 10 months after diagnosis. Typically, patients receive seven... through seven weeks of treatment only to find two months later that it had no effect? Using MRI tumor diffusion values to accurately predict the treatment re...

Gene variations explain drug dose required to control seizures

... said. "For someone at the higher end, it can take months to get their seizures under control. This study uncovers factors that might determine, in advance, which patients will need the higher dose." Before any such pharmacogenetic approaches can be put into practice, they must be explicitly evaluated for ...

Taking Aim With Nanoparticle PEBBLEs

...et that type of cancer usually live less than four months without treatment; rats die within about five days...PEBBLEs, some rats were still alive and active two months later, and MRI images showed that their tumors had vanished. Kopelman and coworkers plan to tinker ...

Potential Cure for Lymphoma in HIV patients

...ly two and a half years, with a range of about six months tosix years.All study patients were to undergo aut...hough two patients died of relapsed lymphoma a few months aftertransplant, 17 of the 20 patients (85 percent) are currently alive andin remission. In addition...

New SARS Protein Linked To Important Cell Doorway

...ed biophysical investigations of emerging diseases months before we can even begin to work with such diseases in culture." Fremont led the initial analysis, which was dedicated to identifying sequences of genetic code that might translate into proteins that could help the virus avoid immune system attacks....

The Shapes Of Life: NIGMS Project Yields More Than 1,000 Protein Structures

...takes to determine a single protein structure from months to days. For example, a robotic arm drops protein solution into thousands of tiny wells for crystallization trials, and an imaging system quickly scans the wells looking for signs of crystal formation ?key to capturing protein structures. “At this l...

Discovery Could Lead To Novel Approaches In HIV Treatment

...ected with HIV and found that,already in the first months following the onset of infection, thymicfunction is decreased. Such a decrease results in a loweredT-lymphocyte production by the thymus.These findings pave the way to the development of novel immunotherapiesof HIV-infected individuals. Such immunoth...

Simple drug has the potential to save many lives threatened by malaria

...n as a suppository) in 103 children aged between 6 months and 5 years with severe malaria. They found the two treatments broadly comparable and suggest that rectal artemether could be used to treat severe malaria where qualified staff and equipment for intravenous therapy is not available. These are encou...

Tiny scaffolding allows stem cells to become working fat cells

...have kept the cells alive and thriving for several months and hope to maintain them for up to a year. "We know that the environment in which a community of cells finds itself has a great deal of influence on the biology underway within those cells," Kniss said. "And that biology is always translated into c...

NJIT Presidential Award winner takes stem cell research another step

...ue and begin to generate healthy tissue. After six months of treatments, the patient's bone would begin to heal. Arinzeh's drive to advance the science of stem cell research has gained her national recognition. In the fall, she earned the highest honor given to a young researcher by President Bush: The Pre...

Bird Brains Show How Trial and Error May Contribute to Learning

...stitute (HHMI) predoctoral fellow, is in the final months of her doctoral training in the laboratory of co-author Allison Doupe at the University of California, San Francisco's Keck Center for Integrative Neuroscience. A similar brain pathway in humans may explain how children learn to talk by listening to...

Influenza vaccine uses insect cells to speed development

.... The traditional egg-based method requires 3 to 6 months to develop the vaccine. With our cell-based method, the time from receipt of the virus strain to the final vaccine product would be shortened to approximately 1 to 2 months." Today's flu vaccines are prepared in fertilized chicken eggs. The eggshell...

Falling ants glide back to trunk to avoid dangers of forest floor

...re in Panama, but it was at that moment in Peru 18 months ago that I realized why they do it: They're trying to get back to the tree, they're trying to not get lost in the understory of the forest," he said. Once they hit the forest floor, he added, they're unlikely to find a chemical trail back to the nest...

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