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Tag: "fall" at biology news

Prenatal Stress Keeps Infants, Toddlers up at Night, Study Says

...oblems in later life, or if both conditions merely fall out of the same stressful pregnancies. Related studies now show that stress, which is associated with increased exposure stress hormones, like cortisol, may disrupt a childs formation of a bundle of nerve cells in the brain called the suprachias...

Research identifies protein that signals flowering in squash plants

...at flower as the days grow shorter, such as in the fall in temperate regions. Long day (LD) plants will flower when nights are short (and days are long), and typically flower in late spring or early summer. SD crops include rice and maize, and LD crops include wheat, barley, oats and peas. Day-neutral pla...

Dirty snow may warm Arctic as much as greenhouse gases

...nject dirty particles into the atmosphere and they fall onto snow, the net effect is we warm the polar latitudes,” said Charlie Zender, associate professor of Earth system science at UCI and co-author of the study. “Dark soot can heat up quickly. It’s like placing tiny toaster ovens into the snow pack.” ...

Research finds that circadian rhythms dominate all life functions

...organs. In fact, only about 5 percent of all genes fall into the same phase or timing of peaks and valleys. Synchronization with the activity of the other genes and genes in different organs is a very important and highly specific part of gene function. In addition, genes can oscillate with different a...

Climate change impacts stream life

...s of species in the streams we examined might also fall by 12-25 per cent if trends continue as expected over the next 50 years". ...

Spreading viruses as we breathe

...before it dries in the air, it doesn't immediately fall to the ground." She said the study, funded by the Australian Research Council, was motivated by an outbreak of SARS in Hong Kong where more than 300 people were infected within the space of a few hours. "We wanted to know how this virus was abl...

Leukemia drug turns mini-molecules up, cancer genes down

...leukemia cells and that this rise coincides with a fall in activity of two important cancer-causing genes. The three are identified as miRNA-15b, miRNA-16-1 and let-7. Two of these, miRNA-15b and miRNA-16-1, reduce the activity of the Bcl-2 gene, which is over-active in many kinds of cancer. The prote...

Row over study puts Korea's scientific community under scrutiny again

...to inherit Hwang's crown, says Gornall. Before his fall from grace, Professor Hwang received the bulk of Korean government funding in stem cell research. But, in November last year, CHA Medical Group announced its plans to succeed Professor Hwang's now defunct World Stem Cell Hub by building Korea's large...

Tracking sperm whales and jumbo squid

...lectronic tags The MEPS study was conducted in fall 2004 near Santa Rosalia, a coastal Baja California town that is the center of Mexico’s jumbo squid fishery. During six days at sea, the research team identified 74 individual sperm whales in a 27-square-mile area. To locate whales, researchers to...

Scientists find potential 'off-switch' for HIV virus

...scovered a specific genetic trigger that makes HIV fall into its latent phase, where the virus essentially hibernates, relatively harmlessly, but awaiting an opportunity to re-emerge and wreak havoc. Weinberger and Shenk studied how an HIV protein, called Tat, plays a major part in initiating and also ...

Gene that makes people 'early to bed and early to rise' demystified

...ll time points and, in the latter half of a cycle, fall below the threshold earlier than normal, leading to activation of transcription earlier and resulting in a shorter period." The advance in understanding of PER2's role may ultimately lead to methods for people, such as nurses who must care for pati...

Global 'sunscreen' has likely thinned, report NASA scientists

...atellites, finding out whether the recent rise and fall of aerosols is due to human activity or natural changes will have to await the planned launch of NASA's Glory Mission in 2008. "One of Glory's two instruments, the Aerosol Polarimetry Sensor, will have the unique ability to measure globally the pr...

Sleep disturbances affect classroom performance

...ikely to have restless, aching legs when trying to fall asleep, difficulty concentrating during the day, snoring every night, a hard time waking up in the morning, sleepiness during the day, and falling asleep in class. "While a series of previously-conducted studies all found that adolescents reportin...

Elderly spinal cord injuries increase five-fold in 30 years, Jefferson neurosurgeons find

... 74 percent of geriatric injuries resulting from a fall in this series." Geriatric patients also appear prone to traumatic spinal cord injuries due to: (1) changes in bone quality with aging (2) increasing prevalence of cervical spinal stenosis with older age (3) an increased rate of motor veh...

Chemical switch triggers critical cell activities

...revent E2 from binding with NEDD8, so it would not fall away from E1. The investigators used a mutated form of E2 that binds to the docking site and gets near NEDD8, but cannot form a thioester bond with it. The team reasoned that if E2 could not bind to NEDD8, it would be stuck on the docking site with n...

Discovery of an HIV inhibitor in human blood points to new drug class

...n use, Kirchhoff said. However, the treatments all fall into one of four categories based on their modes of action, and a growing number of HIV strains are becoming drug resistant. HIV resistance to one drug can lead to resistance to other drugs in the same class, a phenomenon known as crossresistance....

Lead with a poisonous electron shield

... that lead poisoning may have played a role in the fall of the Roman Empire: it is thought to have been caused by the concentration of grape juice in lead containers. Though the introduction of lead-free gasoline has reduced damage to the environment, the annual production of lead continues to increase wo...

How to manage forests in hurricane impact zones

...hurricane damage to coastal forests." In early fall 2005, Hurricanes Katrina and Rita caused what may be the most costly natural disaster in U.S. history, with over 5.5 million acres of timberland in the coastal states of Texas, Louisiana, Mississippi, and Alabama affected. Using available data on the...

Ultrathin films deliver DNA as possible gene therapy tool

.... In his lab, they have developed some films that fall apart all at once, releasing all the ingredients simultaneously. More recent designs erode like a bar of soap, with the effect that outer layers are released before inner layers. By placing one gene in the outer layers and another in the inner l...

Reminding doctors which antibiotics to prescribe cuts C. difficile infection rates

...ions of broad-spectrum agents, and an accompanying fall in CD infections. The research team, from the A...ired targeted effect. There was also a significant fall in rates of CDI associated with the policy change. "We have shown that introduction of a narrow-s...

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