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Tag: "group" at biology news

St. Jude study solves mystery of mammalian ears

...plification in both mammals and non-mammals. One group of scientists believes that somatic motility in ma...hat, in turn, would amplify the sound. An opposing group of scientists maintains that although the vibration of the outer hair cell body itself—somatic motil...

Genomic Analysis Uncovers New Targets for HIV Vaccine

...orts involved were truly remarkable: together as a group we were able to do something that none of us individually could accomplish. The results of this and future CHAVI studies should help individual laboratories across the world perform research to better understand the virus." When someone becomes infe...

Nicotine rush hinges on sugar in neurons

...ine receptor (nAChR), one in a large and important group of molecules, known as ion channel proteins, that allow signals to pass between neurons. The results reveal an important role for the sugar molecules in such proteins. “Our studies fill a major gap in the field and set a new paradigm,” said Lin C...

Agent slows aging in mice

...six to 10 months, once all the mice in the control group have died, the scientists will get answers to the really burning question: Will the mice fed NDGA, already well past middle age, live past the normal outer limit of old age" The longest that mice of this type usually live is around 1,000 to 1,100 day...

Enzyme delivered in smaller package protects cells from radiation damage

...sfected cells. According to Dr. Greenberger, whose group is currently conducting a phase I/II clinical trial in lung cancer patients consisting of twice-weekly swallowed MnSOD for protection of the esophagus from chemoradiotherapy damage, these results suggest that minicircle DNA containing the human MnSOD...

Snoring in children might be an allergic type disease

...of life. 219 children within the original study group had rhinitis and of these, 213 could provide infor...s were similar to those for allergic diseases in a group of children who have been monitored since before they were born. “Our findings were consistent wi...

Caribbean frogs started with a single, ancient voyage on a raft from South America

...cording to DNA-sequence analyses led by a research group at Penn State, which will be published in the 12 J...led and defined an unusually large and unpredicted group of species in South America. "The South American group may have more than 400 species and is mostly...

New bacterium discovered -- related to cause of trench fever

... causing the infection was unknown.” Koehler’s group went on to discover that two different Bartonella ...urnal of Medicine” in 1997. Koehler’s research group found that all pet cats of AIDS patients infected by B. henselae also had the infection in their blo...

In mice, drug protects against diabetes and atherosclerosis

...of age; half received the inhibitor drug. A second group of animals ate the western diet for eight weeks, at which time they developed severe atherosclerosis. Then they were started on the drug to determine whether the drug could halt or reverse the disease process. In both experiments, the drug treatme...

Newly found sensing system enables certain bacteria to resist human immune defenses

... medical implants. Findings by Dr. Otto’s research group are published in the May 29 issue of the Proceedin...ection. Likewise, now Dr. Otto and his research group are hoping for similar possibilities for gram-positive bacteria with their discovery of “aps,” which...

Research shows cord blood comparable to matched bone marrow

...diversity. Human Leukocyte Antigens (HLA) are a group of proteins on bone marrow cells that can provoke the immune system to respond. When doing bone marrow or cord blood transplants, doctors generally try to have the donors’ and recipients’ HLA types match as closely as possible. Wagner added that in...

New collaborative research reveals chimpanzees can sustain multiple-tradition cultures

...rom a separate, unrelated location. After each group of chimpanzees observed a high-ranking female member of its own group complete an action sequence, the majority of the chimpanzees followed that sequence for the remainde...

Stroke study sheds light on left-right brain divide

...ficulty keep track of the changing task rules. The group with damage to the left frontal lobes corrected 68% of mistakes in the test, whereas people with right-brain damage only made corrections to 30% of their errors. This suggests that people who suffer damage to their right frontal lobe following a stro...

Breakthrough developments in rheumatoid arthritis reported

... presenting the lab’s latest genetic findings. The group conducted genome-wide scans to identify polymorphi...higher risk of a wayward T-cell response. The group has since gone on to use modern genetic methods to search for single nucleotide polymorphisms, or SN...

Migration alert -- How tumor cells home in on the lymphatic system

...le, they will migrate towards the vessel. Swartz’s group showed that tumor cells secrete this same molecule. Since lymphatics drain fluid, there will always be slow fluid flow going away from the tumor into the lymphatic vessel. This slow flow biases the concentration distribution of this molecule towards ...

Undergraduate research shows leaderless honeybee organizing

... colony activities are initiated by the cumulative group actions of the colony’s older workers, not by the ...n, however, that the colony is controlled by a key group of experienced bees either. The worker bees that deliver the critical signals have short life-spans ...

Massive herds of animals found to still exist in Southern Sudan

...e were estimated to have been 60,000, and only one group of elephants was sighted where some 10,000 had bee...outhern Sudan Country Program, did finally sight a group of three zebra moving with the white-eared kob migration in Boma National Park. The team also identi...

Progress toward an antitumor vaccine

...s first equipped with a spacer, which has an allyl group (two carbon atoms attached by a double bond) at its end. The glycopeptide is coupled to a building block that causes thiols (sulfur–hydrogen groups) to protrude from the molecule. In the next, light-initiated (photochemical) reaction, only the desire...

Study investigates 'divorce' among Galapagos seabirds

...ing that time, the majority of the females in this group gambled on a new mate, sometimes one that had never bred before. This is one of the few studies that addresses divorce in successfully breeding bird pairs, Maness said. “This study really predicts that the probability of divorce increases with th...

Nurtured chimps rake it in

...social interaction with humans (‘enculturated’); a group raised in a sanctuary setting, with only caretaker...act with humans (‘semi-enculturated’); and another group raised under more austere captive conditions (laboratory chimpanzees). The experiments looked at ho...

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