Tag: "altered" at biology news
Cardiac arrest may hinder ability to learn certain tasks
... dendritic spine density have been associated with altered
behavioral outcomes, such as changes in performance in spatial memory tasks," she said. "This decrease in the number of dendritic spines may have had a direct effect on the performance of the cardiac arrest group. "Most people who survive...
Study: Emission of smog ingredients from trees is increasing rapidly
... tree farming and other land use changes that have altered
the mix of trees in the landscape, said Drew Purves, the lead author of the study that included scientists from four universities. "There are seemingly natural but ultimately anthropogenic (human-caused) processes in the landscape that have had larg...
Researchers devise potent new tools to curb ivory poaching
... whether that is true in time for exemptions to be altered
before elephant populations suffer catastrophic damage, he said. Two years ago, five African nations sought, and three received, an exemption from the ban so that they could conduct one-time ivory sales. Now numerous other countries are considering ...
Researchers create nanotubes that change colors, form 'nanocarpet' and kill bacteria
...a permanent deep blue. The process also chemically altered
the nanotubes so that they became polymerized, giving them a more firm structure. Polymerized, these nanotubes could change from blue to other colors, depending on its exposure to different materials. For instance, in tests with acids and detergents,...
Tips from the Journals of the American Society for Microbiology
...the relative proportions of bacterial were clearly altered
by refrigeration," say the researchers. In the fresh samples, the dominant bacterial population was Lactobacillus lactis, a species of bacteria that is commonly used as a starter culture for many cheeses. After refrigeration, the r...
Joslin President awarded medal from international diabetes organization
...d of insulin signal transduction and mechanisms of altered
signaling in disease. In 1981, Dr. Kahn's laborat...oratory also demonstrated how insulin signaling is altered
in insulin-resistant states, such as type 2 diabetes and obesity; the impact of genetics and environ...
New genetic hypothesis for the cause of autism
...genetic malfunction that may or may not include an altered
DNA sequence. Where the DNA sequence is intact, the researchers believe that gene expression could be faulty. They suggest that some of these genetic factors are inherited, and others occur de novo in genes of the autistic person. In this study, they...
Long-term effects of carbon monoxide poisoning are an autoimmune reaction
...ponse in which lymphocytes, triggered to eliminate altered
MBP, continue to attack normal MBP. Specifically...But if you render their immune systems tolerant to altered
MBP, by feeding them normal MBP before CO poisoning and thereby short-circuiting the lymphocyte resp...
JCI table of contents: 1 September, 2004
... Patrick Bertolino and colleagues used genetically altered
mice models that specifically express immune-reactive substrates called antigens in either the liver cells or the hepatic lymph nodes to examine the mechanisms that mediate these paradoxical activities. The authors found that when antigen was present...
Humans march to a faster genetic 'drummer' than primates, UC Riverside research says
...icial in that they give rise to new proteins or an altered
gene regulation. Sometimes the mutations result in the growth of a cancer tumor, or some other genetic defect. The team, which also included Rosaleen Gibbons, Lars J. Dugaiczyk, Thomas Girke, Brian Duistermars and Rita Zielinski, identified over 2,2...
Highlights of American Chemical Society national meeting in Philadelphia, Aug. 22-26
...w techniques -- including nano-helium droplets and altered
electric fields -- to study chemical reactions at the ultra-low temperatures, less than those found in space. What's more, by slowing classic chemical reactions to a frigid millionth of a degree Kelvin, scientists can study the reactions in more deta...
Streptococcus infects humans by thwarting blood clotting
... against other mammals. The scientists genetically altered
strains of mice to make the animals susceptible to infection by streptococcus. They say their strategy outlines a new path for developing animal models for human-specific microbes. The research is also likely to open the way to new understanding of t...
Circadian clock genes reign in duration of fruit fly copulation
... clock genes, "period" or "timeless," exhibited an altered
sexual behavior in which copulation time was signi...an clock. The researchers found, for example, that altered
oscillations of the circadian clock do not affect the flies' time in copulation and neither does con...
Genetically-engineered 'marathon mouse' keeps on running
... researchers have produced a "marathon mouse" with altered
muscle composition and enough physical endurance t...e quickly. Until the production of the genetically altered
mouse, the only known way to increase endurance was through physical training. "We thought that the...
Genetic clues found for common congenital brain disorder
...to ZIC1. When the researchers generated mice with altered
ZIC1 and ZIC4 genes they found a syndrome virtually identical to the human disorder. Mice with one dysfunctional copy of either gene had mild anatomic abnormalities but no behavioral changes. But about 15 percent of the mice that had one normal and...
Why damaged DNA gets a case of the bends
...t some enzymes bend damaged DNA in order to repair altered
fragments. But no one knew why damaged DNA was more susceptible to bending." Haranczyk and colleagues' simulation, reported Sunday at the American Chemical Society national meeting, offers an explanation. First, they programmed a chemical change to a...
Virus known for its photo ops makes its movie screen debut
...eam and why some medical professionals seek to use altered
viruses to cure illnesses rather than cause them. ... Rossmann's lab. "T4's baseplate proteins could be altered
so it could infect human cells instead of E. coli. This study could bring us one step closer to usin...
Researchers report new gene test for isolated cleft lip and palate
..., species along the evolutionary ladder might have altered
it with greater frequency. "The change wasn't going to cause the condition by itself, because we already had found it in lots of people who didn't have clefts," said Theresa Zucchero, a member of Murray's lab and the lead author on the paper. "But...
Newly discovered protein may be key to muscular dystrophy
...es to determine that the distribution of SNF-6 was altered
in DGC mutants. They found that the DGC, imbedded in the muscle cell membrane, maintains the neurotransmitter transporter at the neuromuscular synapse. In this location, the transporter is available to clear excess acetylcholine. Further studie...
New model can aid in understanding immune system diseases
...ice to see if some of these chemical messenger are altered
when LMP1 is present," Bishop said. The team has other projects planned. The mice used in the study either had only a gene that coded for the normal protein or only a gene that coded for the viral protein. The team will breed mice that have one copy...
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