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Tag: "again" at biology news

Butterfly migration could be largest known

...h British Columbia by summer, before heading south again in the fall. ...

Thai spice helps cut blood sugar swings

...e quick carbohydrate fixes." Next steps Wielinga again warned that any comparison between rats and humans regarding HCA have to be treated very carefully. However, he said now that it is known where HCA has an effect in rats, the next step is to try and uncover its mechanism. He said that "if we can redu...

A New Species of Monkey is Discovered in Tanzania: The First in Africa for More Than 20 Years

...ience. “This exciting discovery demonstrates once again how little we know about our closest living relatives, the nonhuman primates," said Russell A. Mittermeier, who chairs the Primate Specialist Group of IUCN-The World Conservation Union's Species Survival Commission. ``A large, striking monkey in a co...

Doing a spin with DNA

...nd. After a number of turns the topoisomerase ones again firmly grabs the spinning DNA and 'glues' (ligates) the broken stands neatly back together again. The researchers were able to determine the exact number of turns removed by the topisomerase between 'cutting' and 'gluing'. The precise mechanism of t...

Supercomputers to focus brains on AIDS dilemma

...tle, computational and structural biology may once again be on the verge of contributing a new class of drugs for the treatment of HIV/AIDS," said J. Andrew McCammon, a Howard Hughes Medical Institute investigator and UCSD professor of Pharmacology who holds the Joseph Mayer Chair of Theoretical Chemistry ...

Elephant seal pups suffer from ocean warming

...rature generally increased before starting to cool again in 2000. The pups, from a rookery located in central California, were weighed within 10 days of weaning. Le Boeuf and Crocker's results show that the pups' mean weaning weight declined from 146 kg in 1976 to 115 kg in 1999. This coincided with an inc...

Road salt affects mitigation wetlands

...iment." She does not know if the salt levels will again fall back to zero in mid spring this year as Erie had its last snowfall on May 2 and had a three-foot snowfall in late April. "PennDOT is between a rock and a hard place," says Silver. "Everyone knows that the salt is not good for the environment, b...

Double triumph in stem cell quest

... cells. Then there is the ethical issue, which is again exercising Congress. With Verlinsky's method, federally funded researchers could try to derive stembrids using already-approved ESC lines. Verlinsky still has a lot to do to convince others of his claims, however. Marilyn Monk, an embryologist at th...

The evolutionary triumph of flower power

...booklet decorations and book entries. Flower power again triumphed: Those who received the most and the earliest flowers demonstrated the best memory. "Flowers have been ignored for the most part in the literature on plants and people," McGuire says. "Perhaps they have been overlooked because their nature...

Scientists journey to southern Africa to unravel the secret world of elephant communication

...; and an artificial warble tone. A shaker was once again buried near the waterhole and wired to a tape deck in the tower. All three sounds were randomly played through the shaker at different times to see if the elephants could recognize them as distinct vibrations. "We wanted to determine if they can disc...

Strongest proof yet found for prion hypothesis

...nto prions, the samples were diluted over and over again and the process repeated, until the only remaining prions were those that had been generated in the test tubes. These were then injected into the brains of healthy hamsters, which began showing TSE symptoms within four months and, on average, died le...

Marburg haemorrhagic fever in Angola update

...taking away relatives and loved ones who may never again be seen alive. WHO staff in Uige have today reported further signs that community attitudes are improving, though hostility towards the mobile teams remains of concern in one area known to have recent cases and deaths. Efforts to sensitize affected ...

HIV-1 spread through six transmission lines in the UK

...n. This is highly pertinent to the recent increase again in new HIV-1 diagnoses within the UK . “Our study also contradicts assumptions that the HIV-1 epidemic is composed of smaller, independent epidemics defined by risk group, where we have found evidence for at least six larger sub-epidemics, which HIV...

Key mechanism in genetic inheritance during cell division identified

... each daughter cell. After which, the microtubules again disassemble and reform back into skeletal systems for the two new daughter cells. It has been determined, through the genetic research of Barnes and Drubin, among others, that kinetochores must bind to a microtubule spindle to avoid the gain or loss ...

New Drugs For Bad Bugs: UF Approach Could Bolster Antibiotic Arsenal

...stitute drugs, previously treatable diseases could again emerge in more virulent forms. Public health officials cite antibiotic resistance as a growing problem for a host of diseases, from childhood ear infections to malaria. Last year, the FDA published a report calling attention to inefficiencies in the...

Stem cells from brain transformed to produce insulin at Stanford

... blood sugar went up in these mice, the cells once again released insulin. After four weeks the cells had survived, continued to produce insulin and had not changed into other cell types or formed tumors. Kim noted that the amount of insulin produced wasn't enough to effectively treat diabetes. Still, the...

Rats infected as newborns grew up vulnerable to memory problems during an immune challenge

... in its home cage. After 24 hours, the researchers again put each rat in the experimental chamber and recorded whether the rats froze -- was immobilized by fear -- or stayed active. All groups of rats froze the same amount, indicating they had learned. However, immediately after they explored the experime...

Falling ants glide back to trunk to avoid dangers of forest floor

...ly noted, they just make a 180 degree turn and try again ?usually with success. What allows the ants to change direction so quickly is still a mystery. They have long, slightly flattened hind legs which, when combined with abdominal movements, might allow the ants to reorient in midair. They also have an ...

An entropy-based gene selection method for cancer classification using microarray data

...t runs and the gene selection algorithm is applied again to pare down the list of selected genes until a "minimal" subset is obtained that gives a satisfactory accuracy of classification. The algorithm was applied to three different data sets and the results obtained were compared to work done by others us...

Studies reveal methods viruses use to sidestep immune system

...a separate immune pathway in infected liver cells, again by unleashing the NS3/4A protease to cleave another protein essential to triggering immune defenses. Again they found that protease inhibitors could reverse the effects of NS3/4A, allowing this immune pathway to be restored to shut down HCV replicati...

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