Core Spins Faster Than Earth, Scientists Find
...r about three-quarters that of the moon,and a mass density almost 13 times greater than the density ofwater. The mass of the inner core is about one hundred millionmillion million tons -- which is abo...Duke Ecologist Says Logging Is Creating 'Mahogany Deserts'
...parsely dispersed among otherspecies at an average density of one tree per hectare (about 2.5 acres),though occasionally in clumps of up to 20 mahoganies per acre. Mahoganytrees grow so big and wide that they must be spaced far apart to "keepfrom crowding each other out," she said. What Snook couldn't find ...Major Plant Genome Research Project Underway
..., and has the smallest genome and the highest gene density so far identified in a flowering plant. What scientists learn from the study of Arabidopsis genes will be immediately applicable to economically important plant species, according to Mary Clutter, NSF assistant director for biological sciences, and...First Planned Release Of Captive Lemurs In Madagascar Wilds Expected In Fall
...nly 30 to 35 ofthe animals are living there now, a density at least 10 times less thanthat found at any other research site in Madagascar. That number is so lowthat diseases, storms or breeding problems could potentially exterminatethe animals at that location, they warned. Past poaching activities may at l...New "Wonder Peanut" Beats Olive Oil In Healthful Benefits
...ignificant reductions in serum cholesterol and low density lipoprotein (LDL) cholesterol - the "bad" cholesterol. As reported in the July 1997 issue of the scientific journal Lipids, the study concluded that substituting high-oleic peanuts as the primary source of monounsaturated fatty acids as part of a low...Captive Lemurs To Depart For Madagascar Oct. 17 For First Release Into The Wild
...hat only 30 to 35 of the animals live there now, a density at least one-tenth that ofany other research site in Madagascar. That number is so low that diseases, storms or breeding problems couldpotentially exterminate the animals at that location, they warned. A careful study of the reserve has shown that it...Reanalysis Of International Data Finds Sharp Decline In Sperm Density
...is no evidence that this apparent decline in sperm density hasled to reduced fertility, the authors say sperm count may be a surrogateindicator of effects on the male reproductive system. They say, for example,that in countries such as Denmark, England and the United States, where spermcounts have fallen, t......onstruct a high-resolution (2.2 angstroms)electron density map of the complex. The map reveals the nucleic acid-bindingsite, as well as the previously described ATP-binding site that drives theenzyme's activity, amid three distinct structural domains of the NS3 helicase. The structure yields important clues...Iron Deficiency Increases Likelihood Of Bone Fractures
... deficiency eachcontained a pocket with lower bone density than normal. In tests, the femursof the rats that were deficient in iron and copper were approximately 28percent more likely to break than those of the rats on the healthy diet. The bones were tested after the rats were sacrificed. According t..."Genetic Factors Influencing Cholesterol Response To Diet"
...etary fat-induced changes in LDL particle size and density phenotypesare linked to candidate genetic loci. LDL particle size and density areinfluenced by genetic and non-genetic factors, including dietary fat andcarbohydrate. Four genes ......ietary fat-induced changes in LDL particlesize and density phenotypes are linked to candidate genetic loci also will bedescribed by Dr. Krauss. "Genetic factors can predispose people to obesity," said Bouchard, ascientist and Donald B. Brown Chair on Obesity at the department of preventivemedicine at ...The Environmental Consequences Of Increasing Food Production
...of dataincluding topography, hydrology, population density and satellite images for usein models that determine the patterns of land use over large regions. Forexample, Dr. S.S. Jagtap from the International Institute of TropicalAgriculture in Nigeria, and his colleagues are developing strategies using GISfo...Sex Differences In Heart Disease May Be Due To Enzyme That Breaks Down Fat
... particles tendto be the larger kind. "The density of LDL is crucial," he says. "Small, dense LDL is moreatherogenic (likely to clog blood vessels), but the mechanism is unclear."Cholesterol and other fats cannot dissolve in the blood and must be transportedby special carriers made in the liver calle...Soy Protein With Phytoestrogens Inhibit Atherosclerosis Progression As Well As Premarin
...in their effectsin lowering total cholesterol, low density lipoproteins (LDL) and very lowdensity lipoproteins (VLDL) -- two "bad" forms of cholesterol. Both effects werestatistically significant. Soy protein with phytoestrogen had a greater effect in raising highdensity lipoproteins (HDL) -- the ben...Liquid Crystals Light Up Simple Chemical Test
...ork of fields, each field studded with a different density ofmolecular receptors. The test result would appear as a grid of bright anddark squares that would tell the user how much of the targeted materialwas present. Abbott's collaborators on the Science paper were Vinay Gupta, TimothyDubrovsky and Justin ...Small-Scale Fires Key To Understanding Forest Structure
...the 20th century, fire suppression has changed the density andspecies diversity of these forests, but differently in each area. Thecontrolling factor seems to be the direction that the slope faces," Beaty toldattendees at the annual meeting of the Association of American Geographers today(March 29) in Boston......ol/d ( P < 0.001) and trabecular bone mineral density of the spine decreased to 147.7 ± 21.2 mg/cm 3 from 162.9 ± 25.0 mg/cm 3 at prepregnancy ( P < 0.001). Calcium absorption postmenses increased nonsignificantly to 36.0 ± 8.1% whereas urinary calcium decreased to 2.72 ± 1.52 ......levels of the chemicalvasopressin and an increased density of serotonin nerve cell terminals in thebrain area known as the hypothalamus," says Delville. Previous research showedthat vasopressin facilitates aggressive behavior and that serotonin inhibitsaggressive behavior in hamsters and other species. ...Purdue Herbarium -- A Noah's Ark For Egyptian Plants
...row swath of land along the Nile River. Population density along the water's edge is 5,000 people per square mile. Beyond them lies desert. By bringing water to the desert, the Egyptians hope to reclaim land in the "New Valley" for agriculture. By the year 2001, Egyptians will complete a 40-mile canal that p...New Study Shows White Males Have More Receptors For Patent Blood-Vessel Contracting Substance
...ted for the first time dramatic differences in the density of receptorsfor a powerful and naturally occurring blood-borne substance calledendothelin-1. And it's more bad news for white males. "We won't entirely know the relevance of this study until we do the sameexperiments with arterial tissue, but...