four 2 7

Tag: "four" at biology news

Largest genomic search finds genes that may contribute to autism

...ne of 166 children in the United States and affect four times as many boys as girls. "These findings are a piece of the puzzle. As we identify these genes we will be able to screen young children for autism at an early age and begin interventions earlier, which can have a dramatic effect for some chil...

DNA analysis reveals rapid population shift among Pleistocene cave bears

...lation changes). The findings indicated that while four sequence types (known as haplotypes) corresponded to bears 28,000 to 38,000 years old, a fifth DNA haplotype was found only in bears that were 28,000 years old or younger. These data suggested that what had been a stable, long-established cave bear p...

Scientists identify a gene that may suppress colorectal cancer

...research team identified a duplication of DNA—only four bases in length—in a critical part of the Atp5a1 gene. This mutation, which results in decreased levels of Atp5a1 gene expression, is the first mutation identified in the mouse Atp5a1 gene. In trypanosomes (tiny parasitic protozoa that cause ...

Update on census of world's most endangered cat -- Female Amur leopard found dead

...st seven female Amur leopards left in the wild and four rearing cubs. Now we’ve lost a mature, reproductive leopardess and her potential cubs in a senseless killing. This is the third leopard killed within this area over the last five years and underscores the desperate need for a unified protected area w...

Primitive yeast yields secrets of human cholesterol and drug metabolism

...ested the ability of human Dap1 protein to bind to four of the 57 known human P450 enzymes, essentially ch...ng its control might be. Dap1 locked on to all four P450s, including one required for clearing half of all known drugs from the body, another involved i...

Using dental X-rays to detect osteoporosis

...ion of the structure of the trabecular bone. In four clinical centers, 671 women with an average age of 55 years were recruited. To obtain the “gold standard? the team measured bone thickness at the femur, hip, and spine, using the technique that is common for this kind of expensive examination (Bone M...

Tiny clue reveals new path toward heart disease

...t. The researchers repeated the same experiment in four additional patient populations, scanning the DNA of a total of 4,000 individuals, and turned up the same result. "This finding opens up a whole new area of study for looking at risks of cardiovascular disease," said senior study investigator Jeff...

Recently discovered species gain protection

...ithin the Central Cordillera. Seven Vulnerable and four Endangered frog species occur within the new reserve, as do five additional species so new to science that they are still awaiting formal descriptions. At least one of these species is believed to be found only at this site, known as La Forzosa, and ...

Bumblebee house warming -- it takes a village

... or cooling, performed by individual workers under four temperature conditions ?cold, moderate, warm and hot. Temperatures ranged from 10.3 to 38.6 degrees Celsius (about 50 to 101 degrees Fahrenheit). The study focused more on incubation than fanning because the researchers did not want to raise the ...

Experience affects new neuron survival in adult brain; study sheds light on learning, memory

...researchers also compared the number of neurons at four weeks and four months after injections of the chemical marker. This comparison indicates that only young neurons ar...

Billions of dollars saved in US by polio vaccination

... not yet disrupted transmission include regions in four countries (Afghanistan, India, Nigeria, and Pakistan). ...

Salamanders suffer delayed effects of common herbicide

...s and to derive safe concentrations last for about four days," said Jason R. Rohr, research associate at the Penn State Institutes of Energy and the Environment. "They often do not consider recovery processes, persistent effects of chemical exposure, or interactions among individuals within and between sp...

Baby fish 'smell their way home'

...ish larvae in a tank to pure streams of water from four different reefs. To their amazement, within minutes a surprisingly high percentage of baby fish had congregated in the water flow from their home reef. "It was a lot more than you'd expect to happen by pure chance ?and it applied, in differing de...

Multiple malaria infection inhibits spread of parasite

...ia is highly prevalent in Papua. After just one to four malaria infections the immunity against the infectious gametocytes increased. Immunity therefore develops quickly after exposure to an infection. The researchers expect that the modified methods will make it possible to carry out more detailed studie...

Army research mission focused on autism

... at us anymore; he was in his own little world. At four years old, he had no language, was not potty trained, and was smearing (feces) on the walls. My baby had been stolen away from us." This was the reality Lyn Redwood of the National Autism Association faced when her child was diagnosed with autism....

Magnetic system could be key to surgery without scars

...state of the art for laparoscopic surgery requires four or five holes. The question behind this is, can we do the surgery through only one hole and can we hide the hole in a cosmetically advantageous or less painful location,?Dr. Cadeddu said. Study researchers concluded that “the ability to reduce the...

How T lymphocytes attack

...owing because of the lymphocyte injection three or four days previously, the defenders patrolled slowly (4 micrometres per minute) and halted frequently. Their mean rate reached a plateau at 4 micrometres per minute. Then, during later stages when the tumour was regressing, most T lymphocytes resumed th...

Cornell researcher helping develop quick, cheap HIV/AIDS test

...an initial $386,000 (subject to annual renewal for four years) from the consortium to determine a way to simply assess the critical HIV/AIDS immune system factors -- CD4 T-cell count, or CD4+ T-lymphocytes count -- in the blood. "When patients are infected with HIV/AIDS, the number of circulating CD4 T-...

Protein therapy may reduce infarct size in heart attack patients

...of the active study drug (KAI-9803) vs. placebo in four dose groups (0.05, 0.5, 1.25 or 5.0 mg of KAI-9803). Researchers performed tests to assess heart function at various time points and assessed safety and cardiac outcomes through six months. This trial was designed as an exploratory study to assess ...

Many couples choose to donate surplus embryos for stem cell research

... IVF at least 3 years earlier, were presented with four options for the fate of their surplus embryos. The researchers found that 49% of couples chose to donate their embryos for stem cell research, 44% decided to keep them in storage for their own future use, 7% opted to donate them to other infertile co...

1 2 3 4 5 6 7 8 9 10