Tag: "than" at biology news
Computer models expose humans as main cause of caribou decline
...u in northern Alberta would be seven times greater than
it is now, a new study from the University of Albe...ace geological structures, are being made narrower than
they used to be and are no longer cut in straight lines. The lines are also reseeded shortly after b...
Flame retardants found on supermarket shelves
...igher levels of flame retardants in the foods here than
similar market studies from other countries. ...n Spain and Japan and the U.S. levels were higher than
both, according to the Texas study. The Spanish study reported an upper level of 340 parts per tri...
Men from early middle ages were nearly as tall as modern people
...temperatures were as much as 2 to 3 degrees warmer than
subsequent centuries. Theoretically, smaller populations had more land to choose from when producing crops and raising livestock. "The temperature difference was enough to extend the growing season by three to four weeks in many settled regions of no...
Veterinarians discover first known case of canine distemper in a wild tiger
...ic efforts to save her, the tiger died. "With less than
500 Siberian tigers left in the wilds of Russia, this is a very serious threat that could contribute to the loss of this severely endangered population," said Dr. Quigley. In 1994 canine distemper virus killed a third of the lions in the Serengeti. T...
Select research highlights from current AACR journals
...cer according to a study of diets reported by more than
2,500 Canadian women. The research, reported by Pan et al., was conducted by Health Canada; the OMNI Research Group, the University of Ottawa; and the Ottawa Health Research Group, Ottawa, Ontario; and the Canadian Cancer Registries Epidemiology Rese...
Chernobyl study: Risk of thyroid cancer rises with radiation dose
...tified 26 people with thyroid cancer who were less than
20 years old when the Chernobyl accident occurred; the majority were under 16 when their thyroid cancers were diagnosed. They then identified 52 healthy control subjects from the general population for comparison purposes. The controls and cancer cas...
DHA-rich diet protects brain from Alzheimer's damage, UCLA study shows
...they still performed much better in memory testing than
the mice in the first group. "After adjusting for all possible variables, DHA was the only factor remaining that protected the mice against the synaptic damage and memory loss that should have resulted from their Alzheimer's genes," said Cole. "W...
Study reveals first genetic step necessary for prostate cancer growth
...eath for men in the United States. This year, more than
230,000 men will be diagnosed with the disease, in large part due to widespread screening with the prostate-specific antigen, or PSA, test. The test has been controversial because it cannot distinguish between men who have non-progressing forms of th...
Pig-human transplantation not PERVerted
... may be a safer source of transplantation material than
previously thought. To carry out their assessment, the researchers developed a new xenotransplantation model where human cells coexist with large numbers of porcine cells in a transgenic mouse. The study showed that these cells could in fact coexis...
Convulsions in worms mimic epileptic seizures
...were more susceptible to epilepsy-like convulsions than
normal worms. To induce convulsions, the researchers fed the mutant worms pentylenetetrazole (PTZ), a chemical that interferes with the activity of the most common type of inhibitory neurotransmitter, known as gamma-aminobutyric acid (GABA). By pr...
JCI table of contents: 1 September, 2004
... may be a safer source of transplantation material than
previously thought. To carry out their assessment,...of JAM-A in the dendritic cells themselves, rather than
an external lack, caused their enhanced motility and their increased ability to respond to potential...
Researchers identify the genome's controlling elements
... However, because a genome sequence is little more than
a static list of chemicals--like, say, a parts list for a 747 airplane--scientists are increasingly turning their attention to figuring out how living organisms put their genes to work. Using yeast as a testing ground, researchers at Whitehead Instit...
Scientists discover proteins involved in spread of HIV-1 infection
...st. An unexpected result was that there was more than
one VPS37 protein in human cells. In fact, there was a family of four different VPS37 proteins that the scientists named VPS37A-D. Says Sundquist, "We do not yet fully understand why humans have four different VPS37 proteins, but we assume that this ...
Anti-cancer compound in vegetables found to block late-stage breast-cancer cell growth
...ce inhibition of tubulin polymerization are higher than
those achievable via dietary intakes," wrote Jacks...normal cells from the initiation of cancer. "More than
10 years ago, researchers at Johns Hopkins University reported that SUL is a potent inducer of enzym...
Virginia Tech professor honored with DeLaval Award
...ntinues his research projects. He has written more than
400 journal and general dairy interest magazine articles and has advised many independent study students. Nebel received his bachelor's degree from Northeast Louisiana University, his master's from the University of Maryland, and his Ph.D. from Virgi...
Modest climate change could lead to substantially more and larger fires
...e century if summer climate warms by slightly more than
a degree and a half, say researchers with the U.S....re may respond more dramatically to global warming than
in states such as California and Nevada. Researchers have developed statistical relationships betwe...
Molecular motor myosin VI moves 'hand over hand,' researchers say
...illionth of a meter, or about 10,000 times smaller than
the width of a human hair). "First, we attached a small fluorescent dye to one of the arms and took a picture with a digital camera attached to a microscope to find exactly where the dye was," Selvin said. "Then we fed the myosin a little food calle...
Green tea research leads to gum and other products
...k green tea regularly have much lower cancer rates than
populations that don't. His research helped determine that green tea polyphenols help eliminate free radicals, which can damage DNA and lead to cancer. He further found that green tea-induced p57--a protein that helps regulate cell growth and differe...
Mouse study shows NPAS3 and NPAS1 genes may be linked to psychosis
...also may lead to a schizophrenia diagnosis. More than
2 million Americans are affected by schizophrenia,...inhibitory interneurons. These neurons are smaller than
the typical excitatory neurons, which pass electrical signals amongst themselves and act as the brai...
Professor calls for a new branch of learning
...hatic system and so reach other organs more easily than
larger particles do. Inhaled nanoparticles have been reported to travel from nasal nerves to the brain, a phenomenon seen with some viruses similar in size to nanoparticles." Nanoparticles, materials the size of millionths of a millimetre, are alrea...
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