Tag: "reduced" at biology news

Scientists Use Fossilized Emu Eggshells To Discern Changes In Vegetation, Provide Additional Evidence Of Human Impact On Australian Landscape

...For instance, plants with less leaf area wouldhave reduced evapotranspiration, in which plants give off moisture to theatmosphere. This is moisture that would have contributed to additional rainfallinto the continental interior. Soils would have had less organic matter andless ability to hold moisture. Fir...

Purdue Scientist Wants To Find Out What Went Sour With Flowers

...rious disappearance. "Selective breeding has reduced flower scent to almost nothing," saysDudareva, a Purdue University assistant professor in the Department ofHorticulture and Landscape Architecture. "Flowers are bred for color, size andshelf life without any attention to scent. Floral scent disappear...

Fossilized Emu Eggshells Give Clues To 65,000 Years Of Vegetation And Climate Changes In Australia

... practices of the first human colonizers, may have reduced this mechanism and thus diminished the amount of rainfall reaching what is now the arid Australian interior. The influence of humans with their recurrent fires has been suggested as the cause of extinction for a least one Australian megafauna, the fl...

Report: High Carbon Dioxide Boosts Duke Forest Growth By 25 Percent

... built to test out the FACEconcept has also logged reduced growth response to elevated CO2 beginning afterthe fourth of its six years of operation, Schlesinger added. But that plot onlyreceives extra carbon dioxide during the daytime and is marred by "a lot ofdisturbance around the edge," he noted. "...

Fighting diabetes: UD researchers move closer to chip-based control of 'smart,' implantable insulin pumps

...h state estimation" (MPCSE)algorithms, effectively reduced peak glucose levels by 44 percent, in computersimu...published in scholarly literature. The system also reduced by 80 percent the "overshoot," or degree to whichblood-sugar levels rose above a targeted range of 8...

Massive pollution documented over Indian Ocean

...cles, fly ash and mineraldust, the particles often reduced visibility over the open ocean to less than 10kilometers, a range typically found near polluted regions of the United Statesand Europe. The haze layer also contains relatively high concentrations ofgases, including carbon monoxide, various organic c...

Cystic fibrosis gene undetected in screening of infertile men

...ggests testing womenfor gene mutations, noting the reduced likelihood of a severely affected childwhen only one of the parents tests positive. "We have to be more knowledgeableabout the kind of genetics we're dealing with before we start offering thereproductive technology. We need to know the risks." Usuall...

Findings suggest new oxygen-sensing application for material

...y found that reducing theatmospheric pressure also reduced the performance of the devices. Further testsshowe...be suitable forsuch an application. That's because reduced oxygen pressure increases the degreeof "ferroelectric fatigue," which is the biggest obstacle to dev...

Jefferson researchers find access to new methods of HIV prevention for pregnant women and newborns may depend on where they were receiving care

...y, showed AIDS transmission could be substantially reduced duringdelivery by giving AZT to the pregnant women during the last two trimesters ofpregnancy, during delivery, and to the baby the first six months of life. Butbecause the findings were not published for nine months, she says, "the news wasby word t...

For DNA, it's all about fitting in

...ional Institutes of Health and the U.S. Army, they reduced one baseto the smallest chemical entity"a proton"and provided it with a partner that wasnearly double the size of a normal base. Together the two bases filled about thesame space as a conventional pair, fitting within the general structure of DNA,tho...

Weizmann researchers find evidence that links molecular mechanism to Huntington's Disease

...nto nuclearinclusions. Correspondingly, they found reduced TGase activity in lymphoblastoidcells--areas where htt does not aggregate. TGase, therefore, appears to be the"smoking gun" that leads to the formation of nuclear inclusions (httaggregations) in HD patients. Their research is unique, because for the ...

Target for cystic fibrosis drugs found

...ersen says the early overemphasis on this approach reduced fundingto study CFTR. "One alternative to gene therapy is getting outside the cell and showingthat you can correct the problem in a test tube. And that's exactly whatwe've done," says Pedersen. "Then you can go back and see what happensinside the cel...

Mayo Clinic Jacksonville scientists show that specially created molecules can cross blood-brain barrier

...eurotensin's ability to lower body temperature and reduced its ability to blockthe sensation of pain. "Then we injected PNA in the belly of the rat to see what would happen, and wegot the same result," Richelson says. "Nobody had ever shown that you couldinject this type of molecule or any type of antisense ...

Farming's genetic revolution has yet to materialise

...growing them will benefit from improved yields and reduced pesticide costs. Andthey are taking heart from some improvements seen within the USDA's analysis. Inone region in the Midwest, for instance, farmers planting Bt maize had yields 30per cent higher than those growing ordinary crops. "The analysis shows...

When is a pollinator not a pollinator? Tales from an insect crime scene...

...r robbers. "The most probable explanation for the reduced fitness of nectar-robbed scarletgilia is that these plants attract less pollinators," says Irwin. "Hummingbirdstend to avoid plants which are highly robbed, and visit less flowers on thoseplants. Our study shows that nectar-robbing does decrease rep...

CU-Boulder to send experiments ranging from ladybugs to water quality on NASA shuttle

...te Pharmaceuticals of Bozeman, Mont., willtest how reduced gravity and varying red blood cell densities affect theadhesion of white blood cells to infection sites. The results could help improvetechniques used to evaluate the effectiveness of pharmaceutical compounds ondiseases like stress-induced immune sys...

Burrowing mayfly swarms signal a healthier ecosystem, USGS scientists say

...populations. New clean waterstandards have greatly reduced the amount of such contaminants released into thelake. Meanwhile the steady, natural accumulation of lake sediments has finallyburied the toxins lining the lake bottom a few decades ago, creating a habitatthat is again suitable burrowing mayflies. Ed...

$6.75 Million to extend primate studies of diet and aging

...lorie intake for the pastfive to 10 years has been reduced by about 30 percent, as well as monkeyswhose diets permit them to eat as much as they wish. The study of rhesus monkeys builds on extensive research in rodents, spidersand other animals that shows life span can be significantly extended andthe rate o...

Digital plant doctor diagnoses plant problems

...said Halsey. "In this case, theturnaround time was reduced from a matter of days to a matter of minutes." Halsey and Madison County extension agent Jim Fletcher began snapping ande-mailing digital images on a regular basis hoping to build a system fordistance plant disease diagnosis. Eventually, they realize...

New aspen could revolutionize pulp and paper industry

...moved through existingpulping processes, but using reduced amounts of chemicals and less energy. Andso far, they are extremely fast growing, a characteristic sought by treeproducers. In the greenhouse, some transgenic aspen are 30 percent taller thanthe control group. Chiang can only guess as to why they are...

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