Tag: "various" at biology news

Ghengis Khan wonder berry could conquer heart disease

..., Mongolia, China and Russia for health drinks and various cosmetics. Juice extracted using current methods is of poor quality, but scientists in India have developed a highly efficient technique to extract large quantities of cholesterol-lowering compounds. Two companies have shown interest in the process i...

Vaccination with embryonic stem cells prevents lung cancer in mice

...ic vaccine capable of preventing the appearance of various types of cancers in humans, especially those with hereditary, chronological or environmental predispositions to neoplastic disease." However, he warned that the work was still in its early stages and that people should not think that, for instance...

A buffet for early human relatives

... says. The laser was used to remove samples at various points along the length of the tooth, which is marked by tiny ridges called perikymata. They run parallel to the tooth's crown and represent tooth growth, similar to tree rings. Perikymata are produced under the gums during the animal's juvenile year...

To slow AIDS in Russia, treat HIV-positive addicts, Stanford study says

... The researchers also looked at the expense of the various treatment strategies, which had an estimated cost between $9.4 and $11.2 billion over 20 years. Giving medication only to non-drug users was not the most expensive approach, but it prevented the fewest new infections, according to the study. Trea...

Clue found to Epstein-Barr virus' ability to form and sustain tumors

...and Health, designed genetic experiments to mutate various segments of the 640 amino acids that make up the E...hey then infected human B cells with EBVs carrying various mutant EBNA-1s. The analysis showed that one 25-amino acid segment within EBNA-1 was responsible f...

Elusive rust resistance genes located

...O Plant Industry scientist, Dr Evans Lagudah, says various types of rust resistance have been bred into Australian varieties but work against a specific rust species and in some cases are only effective against a limited range of rust strains. "We have identified a ‘DNA marker?that is 99 per cent effecti...

Mysterious 'neural noise' actually primes brain for peak performance

...Bayes optimal,' meaning we are excellent at taking various bits of probability information, weighing their relative worth, and coming to a good conclusion quickly," says Pouget. "But we've always been at a loss to explain how our brains are able to conduct such complex Bayesian computations so easily." Two...

Fast-freeze snapshot yields new picture of nerve-muscle junction

...echnique will open up new discoveries of the roles various proteins play in nerve synapses. "It's going to revolutionize the way we do this kind of analysis," she said. ...

Newly identified biomarker detects and regulates spread of brain tumors

...nal fluid or cyst fluid samples from patients with various CNS diseases using proteomics to examine simultaneously all proteins in biological samples. To validate the study's results, attractin levels in a set of 100 normal and tumoral brain samples also were examined. The researchers found elevated attracti...

Sea urchin genome suprisingly similar to man and may hold key to cures

...set of antibiotic and antiviral compounds to fight various infectious diseases." The sea urchin has been used for many years as a research model to study embryonic development. Cell development is very complicated. In order to properly regulate just one gene expression of a single-cell layered gut of t...

Neural networking nanotubes

...prosthetics. SWNTs are formed from carbon atoms by various techniques including deposition and resemble a rolled up sheet of chicken wire, but on a tiny scale. They are usually just a few nanometers across and up to several micrometers in length. The researchers built up layers of their SWNTs to produce ...

Mapping the mouse genome

...colleagues then investigate recombination rates of various genes by comparing physical and genetic distances for each strain. On average, the recombination rate was 0.63 cM per megabase (cM/Mb) for HS, and 0.62 cM/Mb for RI. They also saw a lot of variation in recombination rate across the genome, between th...

Nanoscale microscope sheds first light on gene repair

... Therefore, the role of the physical structures in various processes within the nucleus can now be visualized. "The general application of these methods will provide unprecedented insights into cellular molecular events," said Bewersdorf. "This study represents a significant advance in our ability to vis...

Teenager moves video icons just by imagination

...ed to the ECoG grid. They then asked the boy to do various motor and speech tasks, moving his hands various ways, talking, and imagining. The team could see from the data which parts of the brain and what bra...

Small, smaller, smallest -- The plight of the vaquita

... For decades scientists from Mexico and abroad, in various international and national fora, have warned the Mexican Government that the vaquita was at risk of being extirpated as a result of the bycatch. The Government has ignored such warnings and chosen to blame the vaquita’s precarious condition on the la...

Regulating the nuclear architecture of the cell

...ilence it," Karpen explains. "Multiply modified at various locations, these histones are a major factor in changing the functions of chromatin, independent of DNA sequence." Karpen and Peng studied fruit flies with mutant Su(var)3-9 genes, flies that could not produce HP1 proteins or the proteins necessa...

From managing sugar to managing healing

...cells, the cells that restore blood flow. Using various cell and molecular techniques, the researchers discovered that insulin stimulates human keratinocytes in culture to proliferate and migrate. In cultured human microvascular endothelial cells, the insulin stimulates only migration into the wound tissu...

Muscle and bone from an ink-jet printer

...MDSCs could be directed when to differentiate into various cell types (e.g., bone- or muscle-like). Immunocytochemical analyses confirmed that the bio-ink patterns successfully directed differentiation of the MDSCs toward a myogenic or an osteogenic lineage in direct registration to patterns. The proof-of...

Antibody extends life of mice with breast cancer

...ability to damage or kill cells (cytotoxicity), in various models of cancer metastasis, and, finally, in mice with metastatic breast cancer. "In addition to providing a survival advantage," said Rittenhouse-Olson, "JAA-F11 immunotherapy reduced the metastatic tumor burden significantly, reflected by both...

Hormone linked to brain's cravings for food and other energy sources

...s, has now been shown to have a broad influence on various brain functions. "This makes sense because the major driving force of life is seeking energy to survive," he said. "Future studies will explore the relationships between ghrelin and cocaine addiction." ...

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