Tag: "humans" at biology news
US researchers show cottonseed drug is cancer treatment booster
...al form of gossypol has been extensively tested in humans
and is well tolerated for long-term use. If we use the more active form,(-)-gossypol, correctly and wisely for example, in combination with radiation and/or chemotherapy gossypol may soon find its new role in our fight against cancer." Dr. Xu wishe...
Of lice and men
...es to our ancestors. The study found modern humans
have two genetically distinct types of head lice. ...sapiens mushroomed after a small band of the early humans
left Africa sometime between 150,000 and 50,000 years ago. The study will be published onl...
How roots control plant shoots
...ial matter given that leafy plants supply food for humans
and other creatures, produce oxygen for all animals to breathe, influence global climate and grace us with the current season of brilliant fall colors. "When we look at plants, it's easy to think only about the above-ground parts you can see," says...
Research team develops nonhuman primate model of smallpox infection
... biological agents in cases where efficacy data in humans
cannot be obtained. In 1999, a study group convened by the U.S. Institute of Medicine recommended that variola research be conducted, and a research plan was approved by the WHO to develop an animal model of the disease. Peter B. Jahrling of the U....
Head lice reveal contact between modern and ancient humans
... the New World louse evolved on an archaic form of humans
and subsequently transferred to a modern version. The split between modern humans
( Homo sapiens ) and one of our archaic forerunners, Homo erectus , took place about 1.8 million ye...
Good news: As you age, leg blood vessels adapt so you can still exercise without fainting
...n, based on previous research in older animals and humans
under resting conditions," Proctor said. But leg vessels of the older men constricted more, perhaps as a compensation for their reduced level of cardiac output. This indicates that the balance between vasodilation and vasoconstriction in exercising ...
NIH funds first nationaL SNP genotyping center at Broad Institute
...ry out large-scale studies of genetic variation in humans
and animals to advance disease gene identification...he diagnosis and treatment of numerous diseases of humans
that may have significant genetic components -- such as Type 1 diabetes, schizophrenia, and some typ...
Researchers find chemosignal that encourages women's sexual desire
...niversity of Chicago. "This is the first report in humans
of a natural social chemosignal that increases sexual motivation," said Martha McClintock, the David Lee Shillinglaw Distinguished Service Professor in Psychology at the University, and the lead researcher in a team at the University's Institute for ...
Bovine genome assembled
...bovine genome is similar in size to the genomes of humans
and other mammals, containing approximately 3 billion DNA base pairs. In addition to helping medical researchers learn more about the human genome and thereby develop better ways of treating and preventing disease, the bovine genome sequence will ser...
Bovine genome sequence available
...bovine genome is similar in size to the genomes of humans
and other mammals, containing approximately three billion DNA base pairs. The sequencing of the bovine genome will also help medical researchers learn more about the human genome and thereby develop better ways of treating and preventing disease....
Botulism bug says no to nitric oxide, provides key to molecule's role in human cell signaling
...ht on how NO connects with its receptor protein in humans
to govern crucial processes in the cardiovascular, neurological and immunological systems, said senior author C. S. Raman, Ph.D., assistant professor and director of the Structural Biology Research Center in the UT Medical School Department of Bioche...
Rutgers-led research offers new clues in the genetic mysteries of maize
...hat other close relatives such as chimpanzees and humans
differ in less than one percent of their genes. "It looks like significant evolutionary change happened in a relatively short time," said Messing. "Because they are immobile, plants have to adapt to changes more rapidly than animals that can move ...
Effort to control trade in great white sharks gets teeth from international community
...ater. Most attacks occur when great whites confuse humans
with their preferred prey--sea lions, seals and other marine mammals. In fact, great white sharks, along with many other shark species, are now thought to be endangered by a combination of game fishing and commercial harvests for fins, which are high...
Where in the brain decisions are made
...dies, the researchers first tested the behavior of humans
competing in a game in which a player was asked to...as equal. Once the researchers determined that the humans
playing the game adopted just such a strategy, they then developed a computer "opponent"--a program ...
Coke versus Pepsi: It's all in the head
... insinuated themselves into the nervous systems of humans
that consume the drinks." Even though scientists have long believed that such cultural messages affect taste perception, there had been no direct neural probes to test the effect, wrote the researchers. Findings about the effects of such cultural inf...
Flies have morning and evening clocks
...ck together." Biological clocks in both flies and humans
operate on a 24-hour, or circadian (Latin for "about a day"), cycle. In humans, the clock's influence is far-reaching, governing such functions as sleeping and waking, fluid balance, body temperature, cardiac output, and oxygen consumption. In the fr...
Experimental drug prevents vaginal simian HIV transmission in monkeys Science study says
...tration would be needed to block HIV infections in humans
-- if research were to progress that far. The conc...herefore, may not necessarily be needed to protect humans
during sexual exposure. The Science authors emphasize that PSC-RANTES is not currently authorized ...
Time-lapse movies show brain cells move like a two-stroke engine
... show that nerve cells in the developing brains of humans
and other mammals move in a two-part "step" led by a structure within the cell called the centrosome. Once the centrosome, the key organizing point for the cell's internal skeleton, moves forward, the cell nucleus follows. The Rockefeller scientists ...
Muscling in on a deadly cancer
...mice, which have a genetic makeup quite similar to humans
and thus are used as "models" for study of human diseases. Co-authors of the studies were University of Utah undergraduate Mark Hansen; Cheryl Coffin, a physician in pediatric pathology; Benjamin Arenkiel, a graduate student in human genetics...
NHGRI seeks next generation of sequencing technologies
...e pairs the amount of DNA found in the genomes of humans
and other mammals. "These grants will open the door to the next generation of sequencing technologies. There are still many opportunities to reduce the cost and increase the throughput of DNA sequencing, as well as to develop smaller, faster sequenc...
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