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How chromosomes meet in the dark -- Switch that turns on X chromosome matchmaking

A research group lead by scientists at the University of Warwick has discovered the trigger that pulls together X chromosomes in female cells at a crucial stage of embryo development. Their discovery could also provide new insights into how other similar chromosomes spontaneously recognize each ot...

The dark chocolate version of Father Christmas is most filling

New research at the Faculty of Life Sciences (LIFE) at the University of Copenhagen shows that dark chocolate is far more filling than milk chocolate, lessening our craving for sweet, salty and fatty foods. In other words, eating dark chocolate may be an efficient way to keep your weight down ove...

Resveratrol, red wine compound linked to health, also found in dark chocolate and cocoa

Hershey's Center for Health and Nutrition announced the publication of a study that shows resveratrol, the compound often associated with the health benefits of red wine, is also found in cocoa and dark chocolate products. In the September 24 edition of the Journal of Agricultural and Food Chemi...

Mystery of infamous 'New England Dark Day' solved by tree rings

COLUMBIA, Mo. At noon, it was black as night. It was May 19, 1780 and some people in New England thought judgment day was at hand. Accounts of that day, which became known as 'New England's Dark Day,' include mentions of midday meals by candlelight, night birds coming out to sing, flowers folding...

Mystery of infamous 'New England Dark Day' solved by 3 rings

COLUMBIA, Mo. At noon, it was black as night. It was May 19, 1780 and some people in New England thought judgment day was at hand. Accounts of that day, which became known as 'New England's Dark Day,' include mentions of midday meals by candlelight, night birds coming out to sing, flowers folding...

Exploring the dark matter of the genome

Not so long ago, the difficult-to-sequence, highly repetitive, gene-poor DNA found in regions of chromosomes known as heterochromatin was called "junk." Like dark matter in the universe, the true nature of heterochromatin was unknown. Now members of the Drosophila Heterochromatin Genome Project...

Illuminating the dark side of plants

Plant poisoning is a significant problem around the world. In the United States, exposures to plant toxins account for approximately ten percent of the annual calls to the nation's Poison Control Centers. Responding to the need for a useful guide to the harmful potential of plants, Handbook of Poi...

New clues to the dark side of a key anti-tumor guardian

Although researchers over recent years have established a foothold in understanding how p53 protects against cancer, the mechanisms by which it might contribute to aging and lifespan are not well studied. In work reported this week, researchers studying p53 function in fruit flies show new evidence...

Opiate cocktail may spare cells from morphine's dark side

Although morphine is well known as a highly effective analgesic, its clinical utility is severely limited by the development of drug tolerance, the requirement for increasing doses to maintain analgesic effect, and the development of physical dependence. In the June 7 issue of Current Biology, rese...

Venomous sea snakes play heads or tails with their predators

...n the tip of the head and the tail. The yellow was deeper than the colours on the rest of the body and the black colorations were much longer than the dark bands on the rest of the body, highlighting the similarity between the head and the tail. The reason for this mixture of behaviour and coloration...

Biologists rediscover endangered frog population

...anapong, a wildlife biologist for the San Jacinto Ranger District in the San Bernardino National Forest was monitoring declining creek water levels in dark Canyon on Aug. 23, 2006, when she noticed many pools drying up, including one where frogs had been living. Concerned about losing the tadpoles, she ca...

Our 'caveman logic' embraces ESP over evolution

...ne Van Hecke, author of Blind Spots: Why Smart People Do Dumb Things. Maggie Jackson, author of Distracted: The Erosion of Attention and the Coming dark Age adds, "Hank Davis reveals the deep roots of humanity's weakness for superstitions, blind assumptions and primitive thinking, and shows how we can ...

New monkey discovered in Brazil

...f the Amazonian Indigenous peoples, extending from the Peruvian frontier today (Rio Yavari) east to the Rio Trombetas. The monkey is mostly gray and dark brown in color, with a distinctly mottled "saddle." It weighs 213 grams (less than of a pound) and is 240 millimeters (9 inches tall) with a 320 mil...

Working to conserve endangered 'Playboy' bunnies

... is estimated that less than 300 rabbits remain today. Hefneri , the most recently recognized subspecies of the marsh rabbit, is small with short, dark brown fur and a grayish-white belly. Discovered in 1984, the subspecies was named in honor of Hefner after his organization donated money to support ...

Flexible solar strips light up campus bus shelter

... There won't be anymore waiting in the dark at this campus bus shelter. New flexible solar cell technology developed by a group of engineering researchers at McMaster University has been instal...

Biologist discovers pink-winged moth in Chiracahua Mountains

..."This large moth flew in and we didn't think much of it because there is a silk moth very much like it, a Doris silk moth that feeds on pines that has dark wings with pink on the hind wings. It's fairly common there." On closer inspection, though, the moth, a female, appeared to be an entirely differen...

CU-Boulder study shows 53 million-year-old high Arctic mammals wintered in darkness

...mammals did not migrate or hibernate," said Eberle. "Instead, they lived in the high Arctic all year long, munching on some unusual things during the dark winter months." The study was funded by the National Science Foundation. An analysis of oxygen isotopes from the fossil teeth helped determine s...

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

...s and fuel-efficient cars, including the Dismissive. "Too many climate change education and awareness campaigns have been like throwing darts in a dark room," said Leiserowitz. "Climate change is ultimately a human problem. If we want to constructively engage Americans in the solutions, we have to fir...

Healing wounds with lasers, vehicles that drive themselves, other cutting-edge optics

... of deflecting the beam up and down, the beam is interrupted or allowed to proceed toward the phosphor screen, where the trace shows up as a bright or dark spot. The display is then scanned across the screen again in a raster pattern to build up a complete screen image (but so quickly that the human eye d...

Low levels of vitamin D linked to common vaginal infection in pregnant women

...erial infection. However, only about one in four Americans gets enough vitamin D. Vitamin D deficiency may be more common in African-Americans because dark pigmentation limits the amount of vitamin D that can be made in the skin through casual exposure to sunlight. African-American women also are less lik...

Public lecture at UC Riverside to discuss origin and fate of universe

...s image to pinpoint distant regions of the universe. Mobasher will describe dark matter and dark energy, the invisible material and force that together form 96 percent of t...

Swine flu: What does it do to pigs?

...l examination, lung lesions large enough to be seen by the naked eye were observed. According to Thanawongnuwech, "These lesions were characterized by dark plum-colored, consolidated areas on lung lobes and were most severe two days after infection, especially in the H1N1-infected pigs, where approximatel...

Apple enthusiasts welcome WineCrisp

...fter 'Delicious'. Korban describes Winecrisp as "not too sweet or too sour". He noted that the tree is extremely productive and the fruit is firm and dark red in color. "The apples are the color of a deep red wine, so we wanted to include 'wine' in the name. They resemble an older apple variety that cons...

When industrious ants go too far

...angements between organismslike the relationship between flowering plants and their bee pollinators. But sometimes these blissful relationships have a dark side, as Harvard biologist Megan Frederickson describes in an article for the May issue of The American Naturalist . Generally, the relationship b...

Laughing hyenas, wailing levees, the sound of cheese and blaring bagpipes

... MEETING: Wimps Hear Dangerous Noises Differently Fish that Live in the dark Have Better Hearing Gene-Laden Bubbles Grow New Blood Vessels Singing Scr...2/asa/abstracts/search.may09/asa840.html 2) FISH THAT LIVE IN THE dark HAVE THE BEST EARS All fish have ears buried inside their heads. But fis...

A biological basis for the 8-hour workday?

...xpression controlled by these harmonics can help an animal prepare for the behavioral and physiological changes that accompany the shift from light to dark and back. "We have less of a handle on the 8-hour rhythms," he says, "but the fact that we can see them reliably means to me there is the possibili...

Better living through chemistry

...sites," said Joye. Selection of the Study Sites Thus far, only about five percent of the world's oceans have been explored. (By contrast, the dark side of the moon has been throughly mapped.) Of all the world's unexplored marine environments, why did the Joye team choose to conduct their micro...

'Delicious' new grape debuts

... 'Carlos', 'Southland', and/or 'Welder'. The original seedling was planted in 1993. The berries of 'Delicious' are oval shaped and reddish, turning dark purple/black when ripe. Fruit ripening dates vary seasonally, but tend to occur in early August at Apopka, Florida, remarkably 2 to 3 weeks earlier th...

MIT: Why we have difficulty recognizing faces in photo negatives

...ays Pawan Sinha, an associate professor of brain and cognitive sciences and senior author of the PNAS study. Sinha has previously studied light and dark relationships between different parts of the face, and found that in nearly every normal lighting condition, a person's eyes appear darker than the fo...

News from the March 2009 Journal of the American Dietetic Association

...vegetable consumption was significantly higher among 12-to-18 year-olds. However, only 8 percent of vegetables consumed by children in all groups were dark green or orange; fried potatoes constituted about 46 percent of total vegetable consumption. The study also found fruit consumption differed signif...

Vanderbilt scientists invent world's smallest periscopes

...ject spurious signals. This should be useful in quantitative fluorescence or bioluminescence studies: Cells can be genetically modified to glow in the dark to provide a measure of cellular metabolic activity or the expression of a specific gene. ...

Genetic adaptations key to microbe's survival in challenging environment

...w route for nitrate assimilation related to how other bacteria use ammonia as an energy source. Photosynthesis cannot occur in the hydrothermal vents' dark environment, where hot, toxic fluids oozing from below the seafloor combine with cold seawater at very high pressures. These results help to explain...

Darwin's seminal impact on biology, anthropology, philosophy and psychology

... 20 years has studied emotions and aggression. Today there is consensus that certain emotions are naturally programmed by evolution. A fear of the dark or of snakes is a reaction to danger. Sexual desire is a condition to reproduction. The same goes for aggression, love, and joy, which is a fundamenta...

Single gene lets bacteria jump from host to host

... strain of the same species of bacteria like a flashlight to illuminate the dark nooks of the reefs where it lives, scientists have found that gaining a sin...um colonizes a light organ within the animal's jaw and helps illuminate the dark reefs in which it forages at night. The fish light organ may also play a ro...

Game of two halves leads to brain asymmetry

... of the brain) and so each side of the brain might be dominant for particular activities." Previous studies have shown that rearing chickens in the dark makes their brains less asymmetric. The chicks can still peck for food and watch out for predators, but only if doing one of these tasks at a time. Wh...

Preventing soil erosion in continuous corn

...corn to N fertilization. The research was also presented in New Orleans, LA at the American Society of Agronomy annual meeting in November 2007. On dark prairie-derived soils with abundant rainfall, the authors, Jeffrey Coulter of the University of Minnesota and Emerson Nafziger of the University of Il...

Dirty snow causes early runoff in Cascades, Rockies

... and colleagues wanted to determine to what degree dark snow contributes to the declining snowpack. To ...wo ways. About half of soot's effect came from its dark color. The other half came indirectly from reducin...While greenhouse gases work unseen, soot bares its dark nature, with a cloak that slowly steals summertime...

2009 DOE INCITE projects allocated at ORNL

...er plant emissions and pumped deep underground, the workings of a molecular machine known as the voltage-gated potassium channel, and the evolution of dark matter in our Milky Way galaxy. These achievements pave the way for unprecedented advances in alternative energy technology, climate change mitigation...

Women double fruit, veggie intake with switch to Mediterranean diet plan

...ded suggested servings, or exchanges, of several categories of foodssuch as dark green vegetables, such as spinach, or high-monounsaturated fats, such olive...rgarine, tahini, pine nuts and sesame seeds. One or more servings a day of dark green vegetables, such as broccoli, peas and spinach At least one exchange...

Caltech researchers get first 3-D glimpse of bacterial cell-wall architecture

... of answers, some of which are wrong." Understanding how the cell wall is built is important, says Jensen, because scientists have long been in the dark about some of the most basic physical and mechanical aspects of bacterial life, including why they are shaped the way they are. "It's hard to understa...
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