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Tag: "start" at biology news

Birds and bats sow tropical seeds

...stands of animal-dispersed trees have grown up and start producing fruit, they'll be exporting their seeds to surrounding landscapes." Over the coming years, tree growth in adjacent forest remnants will be studied. Howe suspects that evidence will support the hypothesis that birds and bats transport a ric...

Firefly protein lets researchers monitor molecule linked to cancer

...ns known as the NF-KappaB pathway. The pathway can start at many different receptors on cell surfaces; its finish changes the activity levels of varying genes. The result, according to Piwnica-Worms, is that the potential reaction patterns in the NF-KappaB pathway form an hourglass-like shape, fanning out ...

Tiny roundworm's telomeres help scientists to tease apart different types of aging

...nothing was known about worm telomeres. "We had to start at the very beginning. But now we know that C. elegans is the perfect model organism to study telomere biology since their regulation is similar to human telomeres," says first author Marcela Raices, a post-doctoral researcher in Karlseder's lab. Ma...

Researchers discover key to human embryonic stem-cell potential

... Once an embryo is a few days old, the stem cells start to differentiate into particular tissue types, and pluripotency is forever lost. But if stem cells are extracted, researches can keep them in this pluripotent state indefinitely, preserving them as a kind of cellular blank slate. The therapeutic goal...

Volunteers sought for avian flu vaccine study

...wards said. Because the study is beginning at the start of this year's influenza season, all participants will be given this year's licensed influenza vaccine if desired. Participants will then be given three doses of either the bird flu or placebo vaccine over the next six months and will be required to ...

Research casts doubt on circulating stem cells

...get the nuclei of the bone marrow-derived cells to start producing muscle proteins again," says Professor Wernig. "While we were able to activate dystrophin production in the muscle, the effect was nowhere near the level needed to combat the disease. But we shall continue working on this and try to awaken ...

Many cats unaffected by catnip, C&EN reports

...with exposure to catnip. These behaviors generally start with sniffing, licking and chewing, followed by head shaking, body and head rubbing, and then repeated head-over-heels rolling, McDaniel explains. While neurologists don’t yet have a thorough knowledge of why catnip works in some felines, they genera...

Plant genes identified that can form basis for crops better adapted to environmental conditions

...; the pericycle cells − must be activated to start dividing again. Therefore, it is also crucial that the cell cycle − the process that directs cell division − be under optimal control. Although the precise factors that underlie these processes and how they work together are virtually unk...

Restaurant seafood prices since 1850s help plot marine harvests through history

...hed records from fossils to fish taxes give a head start to detecting and managing future trends. The "Oce...nflation-adjusted prices of swordfish. Despite the start of a swordfish fishery in the 1880's, no restaurant menu entry for swordfish is seen prior to 1909. ...

Zinc supplements safe for HIV-infected children

...udy visit and three, six and nine months after the start of supplementation. The study authors found no increase in plasma HIV-1 viral load measurements in the children receiving zinc, meaning that zinc supplementation is safe for HIV-infected children. The CD4+ T lymphocytes and hemoglobin concentrations...

Sudden change in social status triggers genetic response in male fish, study finds

...tening displays and chasing other fish. "Once they start changing, there's no question they'll become domin...al to the gonadotropin-releasing hormones cells to start growing. As these cells get bigger, they crank out more and more hormones, transforming the male fro...

Study uncovers placental microtransfusions lead to transmission of AIDS virus during childbirth

...better alternative might be to have pregnant women start taking anti-retrovirals before going into labor. ...

A little telomerase isn't enough

...es in our mice, so the longer the telomeres are to start with, the longer transplanted stem cells will be able to divide and the more likely the transplant is to succeed," explains Greider. To engineer the half-telomerase mice, Ling-Yang Hao, then a graduate student, knocked out one copy of the telomerase...

University of Delaware researchers develop cancer 'nanobomb'

... are exposed to light and the resulting heat, they start exploding one after another." The bombs are created by bundling the carbon nanotubes. With a single nanotube, the heat generated by the light is dissipated by surrounding air. In bundles, the heat cannot dissipate as quickly and the result is "an ...

Scientists observe how a close bond activates the immune system

...ells must recognize a specific antigen before they start to fight an infection. Dendritic cells constantly scour the body for antigens and present these to T cells for review in the lymph nodes. It is a demanding job. "Just 10 dendritic cells can show viral antigens to over a million T cells in a day," say...

Deep treasure to be found in Oculina Bank

...ter their discovery. Among the team's goals is the start of a sustained and critically needed monitoring program to complement , and evaluate the effectiveness of, stricter regulations and enforcement activities in the area. The group will also be exploring new portions of the reef revealed by a recently d...

Marine conservation organizations team up to conduct Indonesia coral reefs assessment

...ge to tsunami-affected coral reefs; mission set to start next week Three leading marine conservation organizations will complete an extensive survey next week along the west coast of Aceh Province, Indonesia, to determine the impact of last year's devastating earthquake and tsunami on the region's coral r...

Scientists map one of biology's critical light-sensing structures

...d death can be precisely manipulated. "We can now start changing how phytochromes work in a rational way to improve how plants respond to light," says Wagner. "People have been trying to do this for a long time. Practically speaking, we can now try to re-engineer the vision system of a plant." According ...

Sperm stem cells closer to being like embryonic stem cells

... still trying to figure out why. But the key is to start with a sample that is 100 percent pure germ cells, which we achieved using the fluorescent marker and other purification methods that are different from those used by other research groups." Other UT Southwestern researchers involved with the work w...

How Fruitflies Know It's Time for Lunch

...ons' activity. In contrast to control flies, which start feeding on a novel food source only after an evaluation phase (they wait a while before initiating feeding), the experimental flies started eating new food right away. These hug neurons may help flies decide whether or not to eat a new food source. ...

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