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Tag: "many" at biology news

Researchers attach genes to minichromosomes in maize

...a long time in the plant world, and it should open many new avenues. If we can do this in plants, many advances could be done in agriculture that would not otherwise be possible, from improved crops to i...

100 percent of pregnant women have at least one kind of pesticide in their placenta

...s "inadvertent exposure"), every day humans ingest many of these substances which cannot be assimilated by our body, and are accumulated in the fatty parts of our tissues. This is especially worrying for pregnant women. During the gestation period, all the contaminants accumulated in the organism have di...

Sleepless for science: Flies show link between sleep, immune system in Stanford study

...en sleep and immunity. "The cool thing is that many of the clock genes are conserved between flies and vertebrates; we have 'period' and we have 'timeless'," said Schneider. "As usual, it doesn't work in exactly the same way, but what the fly does is let us find genes that are involved in the process,...

Female-led infanticide in wild chimpanzees

...d by Cell Press. Infanticide is known to occur in many primate species, but is generally thought of as a male trait. An exception in the realm of chimpanzee behavior was famously noted in the 1970s by Jane Goodall in her observations of Passion and Pom, a mother-daughter duo who cooperated in the killing...

Heavy multivitamin use may be linked to advanced prostate cancer

...ith early or localized prostate cancer, taking too many multivitamins may be associated with an increased risk for advanced or fatal prostate cancers, according to a study in the May 16 issue of the Journal of the National Cancer Institute . Millions of Americans take multivitamins because of a belief i...

Dinosaur hearing, listening to muscle noise, quieter cubicles

...wing items describe some highlights from among the many papers being given at the meeting. Full abstracts ...er hour during non-work periods (for a total of as many as 20,000 per day). Voicing occurred 23 percent of the total time at work and diminished to 13 perce...

Chemical maps hint at drug's effects on schizophrenia

...evels of cholesterol that lead to heart disease -- many lipids have positive effects on basic human functions, including communication among all the cells of the body. Scientists are still trying to sort out which of the lipids that are modified in schizophrenia are beneficial and which ones result in met...

Research says boiling broccoli ruins its anti-cancer properties

...bles severely damages the anticancer properties of many Brassica vegetables such as broccoli, Brussel sprouts, cauliflower and green cabbage. Past studies have shown that consumption of Brassica vegetables decreases the risk of cancer. This is because of the high concentration in Brassicas of substances ...

Herpes infection may be symbiotic, help beat back some bacteria

...irus. During an initial period of acute infection, many of these viruses cause symptoms, such as fever, co...ses." Scientists have recognized for years that many types of bacteria and other microorganisms live in the human gut to the advantage of both the microb...

The quest for an effective HIV vaccine presents new possibilities, challenges

... or produced some combination of these effects. In many of these animals, disease progression was also delayed. Based on the scientific evidence, several questions remain, say Drs. Johnston and Fauci: Can a vaccine that does not prevent HIV infection but reduces virus levels and preserves a segment of...

Hexavalent chromium in drinking water causes cancer in lab animals

...rally administered, it is taken up by the cells in many tissues and organs." Hexavalent chromium has been brought to the public’s attention in many ways, most notably in the movie "Erin Brockovich." Eleven members from the California Congressional...

Do fruit flies have free will?

...ysis indicate a mechanism which might be common to many other animals and could form the biological foundation for what we experience as free will". Our subjective notion of "Free Will" is an oxymoron: the term 'will' would not apply if our actions were completely random and it would not be 'free' if t...

Latent memory of cells comes to life

...ess that involves natural selection operating over many generations. Sometimes however, dramatic and very sudden changes are observed in one individual in the absence of any kind of change to the DNA. This happens in fact in all of us as our body develops: cells with identical genetic information adop...

No magic tomato? Study breaks link between lycopene and prostate cancer prevention

...e ?and beta-carotene, another antioxidant found in many vegetables and commonly used as a dietary supplement. This unexpected observation "may be due to chance, however beta carotene is already known to increase risk of lung cancer and cardiovascular disease in smokers," Peters said. "While it woul...

Peanut allergies overstated, study finds

...d their children have peanut allergies every year, many of the children may be able to eat peanuts safely,...eat them," said Dr Wainstein. Dr Wainstein said many children who have never eaten peanuts and are found to have a positive peanut skin test are probably...

DNA analysis suggests under-reported kills of threatened whales

... 289 samples. They initially expected to find that many of the cuts of meat they purchased would come from... been exploited without regulation or reporting in many countries. "The incentive, obviously, is financial," Baker said. "The result of under-reporting w...

Hives ferment a yeasty brew, attract beetle pest

...hout honeybees. The small hive beetle can destroy many commercial hives. "If we can find out how this system works, there is a good possibility we will figure out ways to protect against the beetle," says Tumlinson. Honeybees in the U.S. and Europe have been suffering from a variety of invaders and...

Rare soft-shell turtle, nesting ground found in Cambodia

...River where the turtle lives is an area closed for many years to scientific exploration because it was one the last strongholds of the former Khmer Rouge regime in Cambodia. The survey was the first detailed study of the area since security restrictions were relaxed in the late 1990s. “Our survey work ...

Newly identified mechanism for silencing genes points to possible anti-cancer strategies

...ctions used by the individual cells to produce the many different proteins that make up the body. Scientists are only beginning to appreciate, however, the extraordinary degree of control exercised over every step of the production process. Only about 10 percent of human genes, for example, are actively...

Left-right wiring determined by neural communication in the embryonic worm

...d" communication channels through which cells pass many kinds of molecules and electrical signals -- that allow growing neurons on the left and right to communicate with each other, a system that dissolves as the worm develops. Every neuron in the adult C. elegans has been mapped and named. Handedness ...

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