Tag: "drop" at biology news
...gencies,releasing them only when neighboring cells drop
out of communication. "Cellularneighborhoods seem to be more conformist than any middle-class suburb,"Raff writes. "As long as the cells reproduce and behave according to localnorms, they are allowed to go on living." One foot out of step, and thece...
Bee Sting Treatment Should Emphasize Speed, Not Method Of Removal
...body responses like constriction of breathing or a drop
in blood pressure. Additionally, victims of bee stings should leave the area where they arestung since the attack may have been the response of a bee defending itsnest, Visscher said. Once a bee stings, it emits a chemical alarm pheromonethat signal...
Impact of Meteorites, Drop in Sea Level Caused Mass Extinctions 65 Million Years Ago
...o present evidence that other factors, including a drop
in sea level prior to the assault by the massive a...than others anticipated, he says. The substantial drop
in sea level, which had peaked at least 10,000 years before the comet struck, accounts for between z...
President's Budget Proposal Cuts R&D By 14 Percent By 2002
...would fall by 9.4 percent, while defense R&D would drop
17.8 percent. The April 23-25 AAAS Colloquium on Science and Technology Policy will examine the impact of the proposed cuts. It will include presentations by John H. Gibbons, Assistant to the President for Science and Technology and Director, White...
Scientists Use Magnetic Field As Alternative To Space-Based Zero Gravity
...s of paper clip metal--were placed one-by-one in a drop
ofpure water levitated in a magnetic field created... result was a force that levitated theembryo-laden drop
inside the solenoid for several minutes until the current wascut. The technique reduced both the ...
Resistance To Leptin Contributes To Obesity
...cereduced their food intake to its lowest level, a drop
of more than 50percent, by the third day, but their food intake crept back to originallevels by the eighth day. After the 30 days of ICV, the researchersreplaced the cerebrospinal fluid and the mice quickly recovered theirweight by eating more food....
Colorado State Biology Professor Says Fatty Acids, Not Shadow, Determine Outcome Of Groundhog Day Feb. 2
... varying amounts of these fatty acids. Theseasonal drop
to colder temperatures in September and October tr...riod, their body temperaturesbegin to mysteriously drop
far below normal and they enter the hibernation stateonce again. "This is an amazing...
New Imaging Technique Pinpoints Dead Heart Muscle
...p to feed the heart's endless appetite for fuel. A drop
increatine concentration has long been known to signal injury and heart muscledeath, but at present, the only way to use it to measure heart damage isindirectly, by looking for the amount of creatine kinase, a heart enzymereleased into the blood that...
Discovery By Fertility Specialist Offers Promise Of Reducing Multiple BirthsTied To Fertility Treatment
... follicle is well and being nurtured. The drop
in FSH stops more follicles from developing, all immature follicles die, but the "recruited" follicle lives. "Nobody knew why the follicle continued to thrive in the face of decreased FSH," Sullivan ...
Research Finds That Watching TV Helps Kids Put On Pounds
...ors. Of additional concern is the dramatic drop
in physical activity amonggirls as they age from 11 to 16. While this may be due, in part, to changinginterests and social demands, the study shows the need for parents and healthcare providers to encourage all adolescents to remain physically activ...
Jefferson Scientists Devise Way To Treat Animals Chronically Infected With Hepatitis B
...lt, levels of the virus in the animals'bloodstream drop
dramatically. The researchers say that the work ma...ts stuck in the cell. "We see a tremendous drop
in envelope virus, and the current virus thatremains, we believe, would be non-infectious. It still...
Bears Cubed: Virginia Tech Studies Three Bears, And Three Bears, And Three More Bears
...rone levels rise until implantation, then steadily drop
until birth. Thebig question facing the researcher...dible is that their heart rate and bodytemperature drop
only slightly. And they are not in a deep sleep -- they can beup instantly. Rule number one when tre...
...ies, andwhen your arteries get hard, too much of a drop
in blood pressure can produceproblems," Absher said. Absher presented the results of his small-scale study involving 10patients today at a meeting of the Space and Underwater Research Group of theWorld Federation of Neurology. The meeting is ...
New Treatment Successful With Hepatitis C
...ses. Interferon's frequent side effects include a drop
in white blood cell countand flu-like syndrome with aches, pains and fever. Hair loss, anemia, thyroiddisease and severe depression occur less frequently. Amantadine has fewer side effects, including: difficulty in concentration,constipation and ra...
Dust Mite Behavior May Show New Ways To Control Pests
...ing a home in the winter will cause the humidityto drop
below 50 percent, but the mites will survive anyway. We think clusteringin addition to entering a kind of hibernation is how theyre able todo that. Glass and Needham did this work as part of a larger Ohio State project thatis seeking new...
Cells Say The Darndest Things
...hemical signals -- could fit into an average-sized drop
of water. "We really are seeing a new era dawning in which people are trying to understand the chemistry of the brain and of the central nervous system, with the possibilities of amazing consequences, from treating mental disease to improving mental ...
Gene-Altered Mice Boost Studies of Cardiomyopathy: Enables Research Into Causes And Treatment Of Heart Failure
...he standard markings of cardiomyopathy -- cellular drop
out, the appearance of fibrous tissue between muscle cells, the odd intermingling of oversized and tiny muscle cells, and the appearance of empty spaces within remaining muscle cells. The mice even develop "nutmeg liver," a classic finding in human ...
Relapsing Fever Spirochete Switches Surface Proteins When It Changes Hosts
.... "One likely cue that promotes this switch is the drop
in temperaturethat occurs when the spirochete moves from a warm-blooded animal to a tick," Dr.Schwan notes. Their observations of Borrelia hermsii, the spirochete that causes relapsingfever, can be extended to other Borrelia species, says Dr. Schwan,...
Largest Generation Of Adolescents Faces Reproductive Health Risks
... abortions or face expulsionfrom school. Girls who drop
out of school as a result of pregnancy rarely returnto complete their education, and their opportunities for socioeconomicadvancement in later life are considerably reduced. In many traditional rural societies however, the vast majority of women mar...
Boosting Immune Response Against HIV-1 Key To Controlling Infection, Say University Of Pittsburgh Researchers
...ne cells are targeted andinfected by HIV-1 and can drop
to dangerously low levels in AIDS patients whenthe...The Pitt study also was the firstto show a drastic drop
in the numbers after a year. Despite the small amount ofkiller T cells, levels of freely circulatin...
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