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Tag: "present" at biology news

Selectivity is ultimate aphrodisiac

...ole in intimate relationships and friendships, the present study reveals a distinctive anti-reciprocity effect if this need is not satisfied in initial encounters with potential romantic partners." ...

Researchers identify ovarian cancer biomarkers

... results identified more than 70 markers that were present in large amounts in the blood vessels of cancer ti...rs were able to determine that some of the markers present in large amounts in ovarian tumors were not expressed by normal ovaries or other healthy organs. The...

RNA splicing factor implicated in ovarian tumor cell growth

...protein that is overproduced in ovarian cancer may present a new target for diagnosis or treatment of ovarian... detection markers, and the other is inadequacy of present therapy for advanced disease. To improve patient survival, it is critical to identify new biomarkers...

Type of stem cell found to reside in transplanted lungs

...originated in the donor, indicating that they were present in the tissue since the time of transplantation. "We were able to isolate the cells derived from the donor as far as 11,5 years after transplantation," says Lama, assistant professor in the Division of Pulmonary and Critical Care Medicine at the U-M ...

How appetite-stimulating brain cells work overtime during fasting

... The role of the related protein, UCP2, which is present at high levels in the hypothalamic arcuate nucleus--considered to be the key brain site that responds to changes in peripheral tissue metabolism--had remained less clear. However, scientists did know that that portion of the brain harbors thyroid hor...

Prehistoric origins of stomach ulcers uncovered

...a that causes most painful stomach ulcers has been present in the human digestive system since modern man migrated from Africa over 60,000 years ago. The research, published online today (7 February) by the journal Nature, not only furthers our understanding of a disease causing bacteria but also offers a ne...

NIAID DNA vaccine for H5N1 avian influenza enters human trial

...ains no infectious material, and the virus was not present during any stage of the manufacturing process, notes Julie E. Martin, D.O., principal investigator of the study. "It is impossible for the vaccine to cause infection," she adds, "because it employs new technology known to safely stimulate broad immun...

How trees manage water in arid environments

...e trees have little ability to access any moisture present in bedrock fractures. Because a late spring/early summer period without any rain is very common in southern Arizona, the mountain forest must have evolved the capability to survive it. The rapid recovery of this forest when heavy rains begin confirms...

Gene variations contribute to aggression and anger in women

...cine Program at the University of Pittsburgh, will present the findings today at the American Psychosomatic Society's Annual Meeting, held in Budapest, Hungary. Previous studies have associated the hormone serotonin with anger and aggression in both humans and animals and have shown that increased seroton...

Nanotechnology meets biology and DNA finds its groove

...r. "And in order to read the molecule, you have to present the molecule." To attack the problem, Schwartz ...ing out a way to take individual DNA molecules and present them in a confined, linear fashion, the genetic information encoded in the arrangement of the base p...

Are one-third of costly implanted heart devices unnecessary? New study suggests yes

...y two years. The reductions in death risk were present even after the authors corrected for many other variables and differences between the two MTWA-positive and MTWA-negative groups. Chan and his Ohio colleagues, led by first author Theodore Chow, M.D., FACC, of the Lindner Clinical Trial Center at...

Anti-wrinkle compound causes pathological reaction in skin cells

...me Morissette, Lucie Germain, and François Marceau present their conclusions about the mode of action of this substance—called DMAE—in the latest edition of the British Journal of Dermatology. DMAE (2-dimethylaminoethanol) is used in many antiwrinkle products dubbed "instant anti-aging face-lifts." This com...

Newborn brains grow vision and movement regions first

...ize arises during prenatal brain development. It's present at birth. That gender difference is set in stone very, very early in brain development," Gilmore said. However, the scans revealed that brain asymmetry -- or which side of the brain is larger -- was opposite in newborns and adults. In adults, the r...

New recommendations against a major opportunistic infection -- cryptococcosis

...es that between the two serotypes of C. neoformans present in France (A and D), serotype A is associated with a more severe presentation and evolution of the disease. Finally, the patients having neurological defects and/or abnormal consciousness, or abnormal neuroimaging at the time of diagnosis, have a wor...

Protein fragments sequenced in 68 million-year-old Tyrannosaurus rex

...ly match amino acid sequences found in collagen of present day chickens, lending support to a recent and stil...uences representing the kinds that might have been present around the time of T. rex. None of his dinosaur peptides matched the theoretical set, which is not s...

Liver regeneration may be simpler than previously thought

...proteins. Since the transcription factors were not present in regenerating livers, it might be easier to stimulate liver regeneration by only activating the other identified proteins. "These results are very encouraging," Karp says. "Not only did we discover that the number of proteins involved in liver ...

Progress toward artificial photosynthesis?

...st step, CO2 binds to individual free amino groups present in the carbon nitride. It then oxidizes the benzene to phenol, and in the end the highly desirable CO separates from the catalyst. "This could make novel, previously unknown chemistry of CO2 accessible," hopes Antonietti. "It may even be the first st...

Microbes start immune response by sneaking inside cells

...r immune system cells, a protein called cryopyrin, present in the fluid inside the cells, responds and activates a key pathogen-fighting molecule, Nunez?team reported last year in Nature. Cryopyrin is implicated in the development of several inflammatory syndromes characterized by recurrent fever, skin rash ...

Rapid, Low-Cost DNA Testing

...termines whether specific DNA target sequences are present in an analyte. In simple terms, the analyte contains the DNA target sequences as well as other DNA sequences, and the assay filters out only the targets. Professor Rothberg's assay is based on the electrostatic properties of DNA. The principle und...

First-degree fetal heart block may be reversible

...n San Francisco. Congenital heart block (CHB) is present at or before birth and impairs the heart's electrical signaling from the upper to the lower chambers. CHB carries a 20 percent death rate and nearly all survivors require pacemakers. Joshua Copel, M.D., professor in the Department of Obstetrics, Gyne...

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