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The egg makes sure that sperm don't get too old

In contrast to women, men are fertile throughout life, but research at the Sahlgrenska Academy, University of Gothenburg, Sweden, has now shown that a fertilising sperm can get help from the egg to rejuvenate. The result is an important step towards future stem cell therapy. The risk of chromos...

Making sure the wonder materials don't become the wonder pollutant

Carbon nanotubes are 10,000 times thinner than a human hair, yet stronger than steel and more durable than diamonds. They conduct heat and electricity with efficiency that rivals copper wires and silicon chips, with possible uses in everything from concrete and clothes to bicycle parts and electro...

Making Sure Sacred Sheep Don't Become Extinct

Animal geneticist Harvey D. Blackburn is responsible for collecting and storing thousands of samples of animal germplasm -- mainly semen and embryos -- to make sure there's enough genetic material to reintroduce a species if necessary. Much of his collection deals with important livestock such as H...

Highest ever winter water temperatures recorded

...ed at what he described as a "bad year" for the industry in the south-east and east coast. "We know the warmer waters have an impact but we're not sure how much," Mr Treloggen said. ...

Leicester research paves way for first use in Europe of an insect to fight invasive plant

...rigorous testing regime undertaken by the not-for-profit research organisation CABI at their quarantine laboratories, the purpose of which is to be as sure as possible that potential biocontrol organisms are restricted to Japanese Knotweed and cannot be tempted to stray onto related British plants or econ...

Douglas-fir, geoducks make strange bedfellows in studying climate change

...tly discovered that wider growth rings reflect low river flows during that year, which is another valuable piece of climate information. "We're not sure why low river flows are associated with good growth in freshwater mussels," Black said. "High-flow events may damage the mussel, while low-flow events...

UA pharmacy research shows prescribers miss potentially dangerous drug pairs

...ates that health professional programs are not doing enough to teach students about potential drug-drug interactions. Consequently, patients should be sure to tell their pharmacist of all the medications they are taking. ...

Building memories with actin

...lidifies them so that heightened synapse sensitivity can persist. The researchers hypothesize that one pathway encodes memories, while the other makes sure they stick around. ...

Battle of the sexes benefits offspring, says research

...tic cooperation - in this case we found that the secret to a stable pairing was to only partially compensate for your lazy partner's failings, to make sure that they stick around." Professor Innes Cuthill, Professor of Behavioural Ecology at the University of Bristol, added: "Of course, we are not clai...

ESHRE launches international study of polar body screening

...Dr. Luca Gianaroli and Dr. Cristina Magli). "Because this is a new technology," said Dr. Gianaroli, "we need to carry out a pilot study in order to be sure that the analysis can be completed within a time period that allows for fresh transfer, as well as to ensure the reliable identification of the chromo...

How mitochondria get their membranes bent

...n, Fcj1 and the F1FO-ATPase appear to have opposing functions. In fact, Fcj1 reduces the formation of F1FO-supercomplexes. "We hypothesize, Fcj1 makes sure that the membrane can adopt a negative curvature, while the F1FO-ATPase supercomplex induces positive bending", Andreas Reichert interprets the result...

Green tea may affect prostate cancer progression

...e sort of benefit relating to green tea components. "Unfortunately, this trial was not a randomized trial, which would have been needed to be more sure that the observed changes were truly attributable to the green tea components and not to some other lifestyle change (better diet, taking vitamins, et...

One of the Largest Wendy's(R) Franchisees, Tar Heel Capital, Reduces Fraud and Slashes Costs with DigitalPersona

...pted the flow of business, decreased productivity and increased IT costs. Now, by using the DigitalPersona fingerprint readers, managers can know for sure who clocked in or accessed the cash registers at any given time. "More than ever, restaurants and retailers are all looking for ways to immediat...

Small molecules mimic natural gene regulators

...gene regulation. In previous work, Mapp and coworkers showed that an ATF they developed was able to turn on genes in living cells, but they weren't sure it was using the same mechanism that natural activators use. Both natural transcriptional activators and their artificial counterparts typically have ...

Equity concerns raised by congestion pricing can be addressed to make approach viable

...oped, the RAND study recommends the approach be tested through modeling. Programs that have been implemented should be periodically monitored to make sure they remain equitable over time as populations and travel patterns shift. The study, "Equity and Congestion Pricing: A Review of the Evidence," is...

Temporary infidelity may contribute to the stability of ancient relationships

... in their nests: Leucoagaricus gonglyophorus. Mature ant colonies contain one fungal clone--a single genotype, which uses several strategies to make sure that other fungi do not invade. Researchers noticed that several queens from different colonies sometimes start nests very close together and wo...

Study suggests obese women should not gain weight

...t gain, with no ill effects. "It is the mindset of our specialty, and our society, that we need to have round, chubby pregnant women in order make sure they are healthy," adds Dr. Thornton. "Pregnancy has become a license to eat. We talk about 'eating for two,' but it's really more like eating for 1 a...

Author says challenging simple concepts can save planet

... planet today if we didn't also have positive qualities such as empathy, cooperation and fairness. As a society, she said we should simply try to make sure our rules try to bring out the best, not the worst in us. The fourth idea she disputes is that we dislike rules. She says humans crave structure, p...

From 'alarmed' to 'dismissive': The six ways Americans view global warming

...cent) do not know much about global warming or whether it is happening and have not thought much about the issue. The Doubtful (11 percent) are not sure whether global warming is happening, but believe that, if it is, it is caused by natural environmental changes and is a distant threat. The Dismis...

Triage technology with a Star Trek twist

...and as a thick as a ream of paper. Achieving this will require hardening of the unit, and further testing of optical stabilization technology to make sure the unit can function despite a responder's arm and hand movements. Transition and commercialization could occur sometime mid to late 2010. The fi...

Immune genes adapt to parasites

...orders. Parasite-driven selection leaves a footprint on our DNA in the form of mutations known as "single nucleotide polymorphisms" (SNPs). Making sure that genetic variation (in the form of multiple SNPs) is maintained within certain immune genes over time helps ensure that the host can fend off diff...

Wings that waggle could cut aircraft emissions by 20 percent

...namics community. It was discovered, essentially, by waggling a piece of wing from side to side in a wind tunnel." "The truth is we're not exactly sure why this technology reduces drag but with the pressure of climate change we can't afford to wait around to find out. So we are pushing ahead with prot...

100 reasons to change the way we think about genetics

...e. Skin cells and brain cells have different forms and functions, despite having exactly the same DNA. There must be mechanismsother than DNAthat make sure skin cells stay skin cells when they divide. Only recently, however, have researchers begun to find molecular evidence of non-DNA inheritance betwe...

Scientists work to plug microorganisms into the energy grid

...ce in sugar release," says Keller. "Trees can be very different. Some trees can be easier to digest, even within the same species." Keller is not sure why some poplars are more likely to give up their sugars than others. It could be genetic or the result of some environmental factor or a bit of both...

New evidence of how high glucose damages blood vessels could lead to new treatments

...ves?" Dr. Tostes says. "If we know how this changes vascular function, we can understand some of the dysfunction that we see in diabetes." To make sure they were targeting the O-GlcNAc sugar and not dealing with other effects of glucose on blood vessels, the researchers blocked the enzyme OGA, an enzy...

System that regulates blood pressure is amiss in some healthy, young blacks

..."For reasons we don't understand, the black kids have improper suppression of this renin-angiotensin-aldosterone system," Dr. Diamond says. To make sure the "fight-or-flight" mechanism designed to raise blood pressure to escape a tight spot was not to blame for holding onto sodium, the researchers meas...

Bowman Global Change says public engagement critical to solving climate crisis

...tes. Calling on communication experts to bridge the gap between the scientists and the public, Bowman says the public is not disinterested but isn't sure what to do. "Even a motivated public is prevented from making meaningful lifestyle choices because they lack specific information about the scope of ...

Mosquito parasite may help fight dengue fever

... McGraw and O'Neill hope to release infected mosquitoes into afflicted regions of the world to limit dengue fever transmission, but only once they are sure that the insects will do no harm to the environment. ...

Origins of wolverine in California genetically verified

... in the study, which is titled "Wolverine Confirmation in California after Nearly a Century: Native or Long-Distance Immigrant?" "We still can't be sure how this animal came to the Tahoe National Forest," said Bill Zielinski, one of the study's authors and a research ecologist at the Forest Service's P...

Purdue study finds dairy better for bones than calcium carbonate

...t was an advantage having milk or dairy while bones were growing over calcium carbonate, and it protects you later in life," Weaver said. She is not sure why dairy is better, but said further study is needed. "I think this will spark some people to want to figure out what it is about milk that gives i...

When industrious ants go too far

... the more living space the ants have. To test this assertion, Frederickson measured the growth rate of sterilized and non-sterilized Nodosa plants. sure enough, the sterilized plants grew faster, providing more space for ants to inhabit. Octoarticulatus ants are taking advantage of a trade-off betwe...

Satellite imagery shows fragile Wilkins Ice Shelf destabilized

... that have brought about the demise of the ice shelf." However, it is still unclear how the situation will evolve. Humbert noted that, "We are not sure if a new stable ice front will now form between Latady Island, Petrie Ice Rises and Dorsey Island. If the connection to Latady Island is lost, the pro...

UTSA, Health Science Center collaborate with Merck & Co. to develop chlamydia vaccine

...enter's vice president for research: "The Health Science Center strives not only to make discoveries that improve the quality of life but also to make sure these breakthroughs are rapidly disseminated through the commercialization process so they can help as many people as possible. We welcome this opport...

Scientists give a hand(edness) to the search for alien life

...m continues to get good results, Germer says, they will propose that it be built into a large telescope or mounted on a space probe. We need to be sure we get a signal from our own planet before we can look at others, he says. But whats neat about the concept is that it is sensitive to something that ...

New light on bipolar treatment drugs

... established for more than 50 years as one of the most effective treatments for bipolar mood disorder. However, scientists have never been entirely sure exactly how it operates in the human brain. Now, new research from Cardiff University scientists suggests a mechanism for how Lithium works, openin...

Nutrition experts propose new class of low-sugar drinks to help stem obesity and diabetes epidemics

...since these are basically flavored sugar water. Schools and workplaces: Offer several healthy beverage choices and smaller serving sizes. Also make sure water is freely available. Government: The FDA should require companies to list the number of calories per bottle or cannot per servingon the front...

Risk of vibration-induced vascular injuries linked to vibration frequency differences

...ntainer where their tails were vibrated at either 63, 125 or 250 Hz. One control group of five rats accompanied them to the experimental area, to make sure any results seen were not related to noise or change of locale. A second control group stayed in their home cages, uninvolved in the activity. Aft...

Oral contraceptives impair muscle gains in young women

...at least 0.5 grams of protein per pound of body weight per day (a third more than is called for by the U.S. government nutritional guidelines) to make sure they consumed enough calories and protein to promote muscle growth. The participants exercised three times per week for ten weeks under the superv...

Oral contraceptives impair muscle gains in young women

...at least 0.5 grams of protein per pound of body weight per day (a third more than is called for by the U.S. government nutritional guidelines) to make sure they consumed enough calories and protein to promote muscle growth. The participants exercised three times per week for ten weeks under the superv...

2009 ASPB Summer Undergraduate Research Fellowship award announcement

...olic fluxes in plants. I am looking forward to a productive summer and I am sure that I will learn a lot from completing this research project. Dianne...r supporting plant biology education, even at the international level. I am sure this is going to be an invaluable experience and I look forward to embarkin...
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