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Tag: "each" at biology news

Spud origin controversy solved

...le there are multiple lines of evidence to support each theory, the Andean introduction hypothesis stems from the belief that the Canary Islands landraces are solely of Andean origin. Although almost all current European potatoes have Chilean traits, the Andean hypothesis supposed that these potatoes aros...

Chemical maps hint at drug's effects on schizophrenia

...mportant tool for designing the best treatment for each patient, Kaddurah-Daouk said....

Scientists seek useful traits in wild cottons

...that shed the small leaves (bracts) at the base of each boll a few days after flower blooms open. Determining whether this trait is dominant, co-dominant or recessive and finding its DNA location could help breeders develop upland cottons that require less lint cleaning ?producing cleaner fiber wi...

Latent memory of cells comes to life

...es that have apparently very little in common with each other, such as skin, brain, or bones. Mechanisms a...ded DNA splits into two single strands, which then each produce a new double-strand. Nucleosomes though are not duplicated like the DNA-strands. Rather,...

Growing nerve cells in 3-D dramatically affects gene expression

...cells as they went into the dishes to be sure that each dish contained precisely the same amount. After a day of growth, the researchers extracted RNA from the cells and conducted a microarray analysis to determine differences in gene activity. The results: A whopping 1,766 genes responded differently,...

DNA analysis suggests under-reported kills of threatened whales

...ture" analysis ?characterized by DNA profiles from each slice of whale meat ?which was developed by one of...from an individual whale remain on the market with each succeeding week, and their estimate of six weeks for the "half-life" of an individual whale gives fu...

Left-right wiring determined by neural communication in the embryonic worm

... neurons on the left and right to communicate with each other, a system that dissolves as the worm develop...ed in two olfactory neurons, AWCON and AWCOFF, one each on the left and right side of the worm's body. AWCON has one set of responsibilities, while AWCOFF h...

Sleep quantity affects morning testosterone levels in older men

... adults get between seven and eight hours of sleep each night to maintain good health and optimum performance. Those who think they might have a sleep disorder are urged to discuss their problem with their primary care physician, who will issue a referral to a sleep specialist. ...

Switching genes to overdrive improves muscular dystrophy symptoms in mice

... the United States, about 400 to 600 boys are born each year with DMD or Becker Muscular Dystrophy, a mild...treated MDX rodents were exhausted halfway through each run. The MDX mice with increased PGC-1alpha activity performed almost as well as normal mice on the ...

Revealing the machinery underlying the 'plastic' juvenile brain

...e in the genetic machinery of the visual cortex in each animal's brain. They found that the brains of the juvenile mice showed activation of specific genetic mechanisms that the adult brains did not. Specifically, the researchers found that visual experience in the juvenile brains triggered telltale ch...

Individuals and populations differ in gene activity levels, not just genes

...variations between those individuals. They studied each person's levels of gene expression, which measures how much a particular gene is activated during the process of translating DNA into a substance called RNA, and from that into basic proteins. The more a gene is expressed, the more "messenger" RNA is...

Proteasome activator enhances survival of Huntington's disease neuronal model cells

To function, each living cell needs both to build new and to degrade old or damaged proteins. To accomplish that, a number of intracellular systems work in concert to keep the cell healthy and from clogging up with damaged proteins. When proteins or peptides mutate, t...

UCLA study uncovers clues for why Graves' disease attacks the eyes

...es from healthy people, with about 100 subjects in each group. The new antibody was found in almost all of the GD patients?blood. The new antibody binds to the excess receptors on the T-cells, mimicking the actions of a hormone called IGF-1, or insulin-like growth factor 1. Similar to insulin, IGF-...

MIT's ocean model captures diversity of underwater forests

...ne in relative abundance through interactions with each other, and the environment, as dictated by natural selection," said Chisholm. Indeed the guiding principle of the new model is natural selection. It simulates the physical and chemical characteristics of the oceans, but adds to the virtual soup ab...

Leeches ferry infection among newts

...scle contains many spores (also called spherules), each of which contains hundreds of infectious cells called endospores. Raffel and his colleagues think that the infection is transmitted when one of these spores bursts open and releases its endospores onto the mouthparts of a feeding leech. Their finding...

In young mice, gregariousness seems to reside in the genes

...sonic chattering that mice use to communicate with each other. For the more socially predisposed animal, gregariousness was the order of the day, says Lahvis: "A young mouse will seek social interaction and avoid isolation. The social life of these animals is a rich integration of behavior, vocalizatio...

Scientists identify pancreatic cancer stem cells

...e. The researchers then implanted about 100 of each type of cell in mice, and found that tumors would ...s, such as CD44 and CD133, but it is possible that each tumor cancer stem cell has its own set of unique markers," Simeone said. ...

Heart failure: Intervention possibilities from imaging programmed cell loss

...adually worsen—and 550,000 new cases are diagnosed each year. Researchers attached a radioactive substance to annexin A5, a protein that binds to dying cells, said Hofstra. They then used nuclear imaging that produces three-dimensional computer-reconstructed images to reveal information about both str...

2 brains -- 1 thought

...power. Already in a network of 1000 neurons (where each neuron can be connected to any other) there are a million possible contacts between any two neurons and consequently an unimaginably large number of possible networks. Each combination can have either an inhibiting or an activating effect on the down...

Transfusion expert urges wider use of filtered blood

...es show that an upfront increase of $25 to $35 for each unit of filtered blood is offset by savings from l...assessed the statistical methods that were used in each study, and found what they believed to be flawed data in some cases. The chief problem, Blumberg's g...

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