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Tag: "not" at biology news

College students who pull 'all-nighters' and get no sleep more likely to have a lower GPA

...se of a single night of total sleep deprivation is not an effective practice for achieving academic goals," said Pamela Thacher, PhD, of St. Lawrence University in Canton, New York, who authored the study. The findings are based on interviews with 111 students at St. Lawrence University. The amount...

Nurtured chimps rake it in

... fruit yoghurt reward. The overall study examined not only whether the chimpanzees understood the properties of the tool, but also whether they understood the reasons why the tool worked. The researchers gave the animals access to small rakes with either a rigid wooden head or a flimsy fabric head. ...

New findings challenge established views on human genome

... elements and other types of DNA sequences that do not code for proteins, interact in overlapping ways not yet fully understood. In a group paper published in the June 14 issue of Nature and in 28 companion...

Plants recognize their siblings, biologists discover

...plant isn’t as passive as widely assumed, at least not with strangers. Researchers at McMaster University have found that plants get fiercely competitive when forced to share their pot with strangers of the same species, but they’re accommodating when potted with their siblings. The study appears today...

Penn researchers link cell's protein recycling systems

...ing that the cell’s normal disposal mechanisms are not operating correctly. Now, researchers at the University of Pennsylvania School of Medicine have discovered a molecular link between the cell’s two major pathways for breaking down proteins and have succeeded in using this link to rescue neurodegenera...

Plastic that grows on trees

... for converting fructose to HMF,” Zhang said — but not so well when glucose is the initial stock. In fact, attempts at direct glucose conversion created so many impurities that it was simpler to start with the fructose, less common in nature than glucose. Zhang and his team, working with a high-throug...

Exploring the dark matter of the genome

...ochromatin, including 13 single-copy genes that do not code for proteins but for small RNA structures called noncoding RNAs. They also found pseudogenes -- truncated copies of genes which have become inactive, most likely because they have been duplicated or code for traits no longer needed by the or...

In nature, proteins sweep up nanoparticles

.... Such tightly packed metal sulfide formations are not new to scientists, but they do beg a question that remains unanswered: Why do the nanoparticles group together" Something so small should disperse throughout the mine. Instead, the metal nanoparticles form blobs that measure several microns in diamet...

Marine phytoplankton changes form to protect itself from different predators

...tely introduced into Phaeocystis cultures that had not been attacked. The scientists then studied how the different chemical signals affected the percentage of Phaeocystis living in colonies or as solitary cells. Finally, they examined whether this response affected how much the predators ate to determ...

Warning from Asian bees

... mite – destructor and jacobsoni; the latter would not threaten the health of local bee populations but d...Solomon Islands, they could become a serious pest, not just for beekeepers, but of concern to agriculture generally. Bees play a big role in the food su...

Staphylococcus aureus hides out in cells

...n designing new antibacterial drugs. S. aureus has not traditionally been considered an intracellular pathogen, but the molecular details that govern its extended persistence remain largely unknown. The bacteria can generate relapsing infections even years after the first episode was apparently cured. ...

Research finds that circadian rhythms dominate all life functions

...scale that measures levels of expression, we could not find a single gene that did not oscillate," Ptitsyn said. ...

Runners -- Let thirst be your guide

...though most cases are mild enough so that they are not noticed by the athletes themselves. “The tragic...e, Verbalis points out that “unfortunately, we are not seeing this condition go away." “The public’s impression of the amount of water that is necessary...

Mutating the entire genome

...e human genetic blueprint, yet diseases can result not only from mutant genes, but from mutations of othe...ne or other DNA sequence, although the savings are not proportionate because more mutant mice must be bred to obtain desired mutants, he says. Capecchi...

Clot-dissolving agent may be beneficial in treatment of severe frostbite

...ostbite patients treated from 1995 to 2006 who did not receive tPA, plus one who received tPA more than 2...ed with 97 of 234 (41 percent) among those who did not receive tPA. “Moreover, no proximal [closer to the body than the fingers or toes] amputations were r...

Potato wart eyed as risk to potato production

...rldwide quarantine plant pathogen of potato. While not harmful to humans, the disease causes unsightly growths that initially appear white, and then turn brown or black as they decay, rendering the potato tuber unrecognizable and inedible. There is a zero tolerance for the fungus that causes potato w...

UCF nanoparticle offers promise for treating glaucoma

... earlier experiments with nanoparticles have shown not only high penetration rates but also little patient discomfort. The miniscule size of the nanoparticles makes them less abrasive than some of the complex polymers now used in most eye drops. Seal and his team created a specialized cerium oxide n...

Researchers demonstrate way to control tree height

...lant cells – when they are inhibited, the cells do not fully elongate, and plants remain short and stocky. “It’s really interesting that these genes from Arabidopsis, which is a small plant in the mustard family, have been conserved through 50-100 million years of evolution and can perform more or les...

Blood-brain barrier breached by new therapeutic strategy

...administration of the RNA interference therapy did not trigger inflammation or antibodies to the peptide. Currently, doctors use various methods to deliver therapeutic drugs directly into the brain. These methods involve invasive procedures that result in only localized delivery around the site of in...

Weizmann Institute scientists develop a general 'control switch' for protein activity

Our bodies could not maintain their existence without thousands of prot... manipulations of this sort are complicated and do not fully meet the researchers’ needs. Prof. Mordechai “Moti” Liscovitch and graduate student Oran Erst...

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