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Tag: "evolution" at medical news

Size and Position of Floral Anther Plays a Vital Role in Pollination

... depend on for life. Evo-Devo, or the linking of evolution and development is a shift in the paradigm of how ... dogs, and flowers, understood that explaining the evolution and diversity of living organisms, from mosses to elephants, would require an understanding of devel...

Completely Neutral Evolutionary Changes Helped Shape Our Genome

...red times. "For a long time, the basic belief of evolution was that all random genetic changes that manage to stick around have some selective advantage. But our work adds to the case that frequently, we are what we are largely due to random changes that are completely neutral," said Nicholas Katsanis, Ph.D....

Amorous African Fish Exchange Electric Pulses While Mating

...sh, researchers hope to gain new insights into the evolution of animals' breeding behavior and communication. The new study suggests that electrical signaling may have been shaped in part by sexual selection, the evolutionary process responsible for many animals' elaborate decorative features and courtship ...

Plants Respond to Changing Environment

...oes not result in growth repression. Not until the evolution of the gymnosperms (flowering plants) 300 million ...tudy is able to associate with major stages in the evolution of todays flowering plants. It also involves two types of evolutionary change. As well as structur...

Natural Selection in Butterflies

... pressures, such as an extremely skewed sex ratio, evolution can happen very fast." Charlat pointed out that, unlike mutations that govern such traits as wing color or antennae length, a genetic change that affects the sex ratio of a population has a very wide impact on the biology of the species. It is no...

Evolution of HIV from African Greek Monkeys

... shed light on the future course and timing of the evolution of HIV. The new research also challenges the idea that one ancient SIV was transmitted vertically, down through time, and evolved into many SIVs as its original host diverged into many different species. Wertheim and Worobey suggest various SIVs a...

Radiology Workforce Shortage

...mic Affairs and Workforce for RANZCR, support role evolution within radiology but say it is responsible to delegate the role of reporting. The provision of an integrated radiology report is not just an interpretation of an X-ray or scan in isolation, says Dr Kenny. It requires detailed medical knowledge to p...

Ancient Viral Defense may Explain Susceptibility to HIV: Study

...IV-1," said Emerman. "In the end, this drove human evolution to be more susceptible to HIV," or human immunodeficiency virus. The study does not have any implications for modern-day research into HIV but sheds some light on how ancient viruses have shaped our "viral defenses," he said....

Genetic Cause of Inherited Eye Diseases Identified

... with mammals, have been thought to be remnants of evolution without much purpose. But new research has shown that mutations in genes that encode the proteins of cilia are common causes of a host of genetic diseases, including inherited retinal diseases and polycystic kidney disease. Cilia diseases can also ...

Another Sexual Attraction is Possible ...

...hence they are thought to play a major role in the evolution of mating barriers and in the formation of new species. The fact that conspecific males and females recognize each other by their common use of a highly specific "language" is likely to decrease the fitness of mutants that might use slightly differ...

Revealing the Secrets of Gut Ecosystem

...ence in the intestine. The new study tracked the evolution of the microbial ecosystems in 14 healthy, full-term human infants that were breast fed. Most of the bacteria that live within humans do not thrive in an oxygen-rich environment, and thus are difficult or impossible to grow in culture in the lab. So ...

A New Signaling Mechanism in Drosophila

...d signalling systems have been observed throughout evolution and hence, studies with models such as the fruit fly, can provide further insight into how these signalling mechanisms work in humans....

RNA Play a Vital Role in Gene Activity

...es." The work will also provide insight into the evolution of gene regulation. Because RNA is thought to have preceded DNA in the evolutionary timeline, it makes sense that it still plays a role in controlling DNA's function. Rinn and Chang's Stanford collaborators on the research include cancer biology gr...

Female Ducks Develop Complicated Genitals to Outwit Aggressive Males

... a species evolved better defenses, they drove the evolution of male phalluses. The males have to step up to produce a longer or more flexible phallus, she said. "You can envision an evolutionary scenario that, as the male phallus increases in size, the female creates more barriers. You get this evolutionary...

Why Humans Fail to Act on Climate Change

... "We are, well, a little like rats, programmed by evolution to find advantages and exploit them," said Ernst, who is also spokesman for a panel on environmental psychology in the German Society of Psychology. "Short term advantages are preferred to the long-term variety." Ernst made his remarks as a scienti...

WHO Director Urges Nations to Share Bird Flu Virus Strains

...global health in the 21st century. Tracking H5N1's evolution is essential to determine when virus mutations might enable it to be more easily spread between people. Without current bird flu samples, Chan warned that the global community's current stockpiles _ numerous countries have bought anti-viral and pre...

Clock Gene Plays Role in Weight Gain, Study Finds

...he history of life on the planet, and tied through evolution to the astronomical cycles that effect Earths environment, the rise and setting of the sun, and the passing of seasons....

Study Finds the Spread of Rabies in North American Raccoons

...pulation expansion over 30 years have shaped viral evolution on a geographic scale. Landscape features, such as...uch as rabies, ebola and hantavirus, undergo rapid evolution while expanding their numbers and geographic range. Yet, it is difficult to demonstrate how these pr...

Scientists Create Synthetic Proteins

...ain fundamental questions regarding the origin and evolution of proteins," said Chaput. "Would proteins that... advantage over nature of being able to freeze the evolution of our lab-evolved proteins at different time points to begin to tease apart this random process and...

Drink, Binge and the Genetic Link

...Although these findings are part of the inevitable evolution of the developed and developing nations the world over, it must be noted that these discoveries must not be used to stigmatize the susceptible and great care must be exercised to implement it in a socially responsible way for the collective good of m...

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(Date:7/10/2014)... Harbor, NY For decades, health-conscious people around the ... in antioxidants, figuring this was one of the paths ... , Yet clinical trials of antioxidant supplements have repeatedly ... to reduce their cancer risk. Virtually all such ... cancer. In fact, in several trials antioxidant supplementation ...
(Date:7/10/2014)... at sarcomas research group at the Bellvitge Biomedical Research ... have been tested in 19 patients a new therapeutic ... which indicate that the new treatment could stabilize the ... in the British Journal of Cancer ., ... and complex since there are several subtypes. It can ...
(Date:7/10/2014)... a new drug could prove useful in treating small cell ... , Scientists from the Cancer Research UK Manchester Institute, based ... Cancer Research Centre, teamed up with experts at AstraZeneca, as ... drug known as AZD3965 - on small cell lung ... Clinical Cancer Research , also helps identify which patients are ...
(Date:7/9/2014)... WASHINGTON, DC (July 10, 2014) If you think winning ... fun for kids think again: Winning along with other mental ... each of which falls into one of 11 big fun ... that winning is all important when it comes to the ... identify and quantify what goes into this elusive conceptuntil now. ...
(Date:7/9/2014)... of low back pain are not linked to weather ... and precipitation. Findings published in Arthritis Care & ... Rheumatology (ACR), indicate that the risk of low back ... gusts, but was not clinically significant. , According ... low back pain at some point in their life, ...
Breaking Medicine News(10 mins):Health News:How antioxidants can accelerate cancers, and why they don't protect against them 2Health News:New therapeutic combination to slow resistant sarcomas 2Health News:New drug active against most aggressive type of lung cancer cells 2Health News:Being a good sport ranks as the top 'fun' factor in study of youth sports 2Health News:Being a good sport ranks as the top 'fun' factor in study of youth sports 3Health News:Low back pain? Don't blame the weather 2
(Date:7/10/2014)... and teens living with a cardiac pacemaker, a low ... of life, reports a study in the July ... the official journal of the Society for Developmental ... by Lippincott Williams & Wilkins , a part ... function as a protective factor against lower health-related quality ...
(Date:7/10/2014)... image was collected by the Moderate Resolution Imaging Spectroradiometer ... Each hot spot, which appears as a red mark, ... MODIS instrument recognized temperatures higher than background. When accompanied ... hot spots are diagnostic for fire. , This ... coming directly from the fires, although the smoke released ...
(Date:7/10/2014)... some patients, the chronic inflammatory skin diseases psoriasis* and ... have therefore had to base their decision on which ... an examination of tissue samples. A team of researchers ... of Munich (TUM) have now analyzed the molecular processes ... This has enabled them for the first time to ...
Breaking Biology News(10 mins):For children with pacemakers, 'self-competence' affects quality of life 2New diagnostic test to distinguish psoriasis from eczema 2
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