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Hypothesis in Biological News

Global warming link to amphibian declines in doubt

... extinctions. The first -- chytrid-thermal-optimum hypothesis -- suggests that the declines were triggered by ... to a second theory -- spatiotemporal-spread hypothesis -- amphibian declines were simply driven by the ... Foundation. The scientists checked the first hypothesis to see whether climatic factors such as the ...

Florida's 'worm grunters' collect bait worms by inadvertently imitating mole sounds

... performed a number of experiments to test this hypothesis with the cooperation of veteran worm grunters ... completely healthy. "This made the rain hypothesis questionable," he says. But the more definitive ... came out in an hour. That seemed to rule out the hypothesis that worm grunting mimics the sound of rainfall. ...

August 2008 Geology and GSA Today media highlights

... 635-638. Rey and Coltice present a working hypothesis that claims that circa 2.8 to 2.5 billion years ... an earthquake and determined that the earthquake hypothesis is mechanically implausible. Tingay et al. then ... no known mechanisms that support the earthquake hypothesis and that the Lusi mud eruption was most likely ...

Tomato pathogen genome may offer clues about bacterial evolution

... Tech plant scientist to test an intriguing hypothesis about how agricultures early beginnings may have ... other preliminary data, allowed me to develop a hypothesis on the evolution of plant pathogenic bacteria ... the beginning of agriculture, Vinatzer said. The hypothesis is that plant pathogenic bacteria evolved from ...

Tomato pathogen genome may offer clues about bacterial evolution at dawn of agriculture

... Tech plant scientist to test an intriguing hypothesis about how agricultures early beginnings may have ... other preliminary data, allowed me to develop a hypothesis on the evolution of plant pathogenic bacteria ... the beginning of agriculture, Vinatzer said. The hypothesis is that plant pathogenic bacteria evolved from ...

New hypothesis for origin of life proposed

... oceans, according to a new hypothesis. The hypothesis was developed by Helen Hansma, a research ... Biology in Washington, D.C. The Hansma mica hypothesis proposes that the narrow confined spaces between ... today. Besides providing a more plausible hypothesis than the prebiotic oceanic soup model, Hansma ...

December GEOLOGY and GSA TODAY media highlights

... Subduction origin on early Earth: A hypothesis Vicki L. Hansen, University of Minnesota, ... in the early 1960s. Hansens paper presents a hypothesis for how plate tectonics might have begun on early ... at different places and different times. Hansens hypothesis postulates that the ability of a terrestrial ...

MIT: blood may help us think

... brain region where the seizures occur, and the hypothesis suggests this abnormal flow may induce epileptic ... an alternative to current therapies. The hypothesis also has important implications for functional ... To Moore's knowledge, the Hemo-Neural hypothesis offers an entirely new way of looking at the ...

Tufts University biologists link Huntington's disease to health benefits in young

... 8, 2007 online issue of the journal Medical hypothesis and will soon appear in print. Huntingtons is ... at 41.5 years of age. In their alternative hypothesis the Tufts researchers suggested that individuals ... autoimmune diseases." Starks said that the hypothesis pointing to health benefits of people with ...

Species still have more viable offspring if they can choose their best mate

... studys strongest arguments for the Compensation hypothesis is that it includes experimental results in ... their own mates, said Gowaty. The Compensation hypothesis is Gowatys work and was first published only four ... it for more than a decade. Just howand ifthe hypothesis works in humans remains unknown, since studying ...

Study reveals predation-evolution link

... be controlled by another factor. The first hypothesis is that predation intensity could be driving ... intensity more species evolve. The second hypothesis is that as biodiversity increased, by chance ... diversity is high, said Huntley. And the third hypothesis is that something else is driving both predation ...

Dominant cholesterol-metabolism ideas challenged by new research

... important for producing HDL. The most popular hypothesis was put forth in 2000 by Giovanna Chimini, Group ... any evidence whatsoever to support the popular hypothesis that the ABCA1enzyme catalyzes the movement of ... experimental results were consistent with the hypothesis that ABCA1 influences the first step in the ...

August 2009 Geology and GSA Today media highlights

... and tsunami generation. The presence of trapped, pressurized fluids is one hypothesis widely invoked to explain these "weak faults," yet it has been notoriously ... forcing of tropical systems. Their findings indicate that the long-held hypothesis that the Inter-Tropical Convergence Zone has migrated southward during the ...

Penn-Wistar team gains insight into HIV vaccine failure

... and the University of Pennsylvania reports new evidence refuting a popular hypothesis about the highly publicized failure in 2007 of the Merck STEP HIV vaccine ... says Betts. "This is probably the major factor that disproves the main hypothesis proposed to explain the STEP trial results." The team next questioned ...

Study finds role for parasites in evolution of sex

... when the do-it-yourself approach is so much more efficient? One hypothesis is that parasites keep asexual organisms from getting too plentiful. When ... was surprisingly fast and consistent with the prediction of the parasite hypothesis for sex," Jokela said. "These results suggest that sexual reproduction ...

Cancer: The cost of being smarter than chimps?

... on to something. The new study is available online in the journal Medical hypothesis and will appear in the forthcoming issue of the journal. "I was always ... obtained additional direct experimental evidence consistent with the hypothesis that apoptotic function is more efficient in chimps than in humans. ...

Computational model examines the pathways of Alzheimer's that strikes at the young

... and tangles and their influence in causing FAD. The model tested the hypothesis that certain variablesgenetic mutations in proteins and "tau" tanglesmight be predicative of the development of the disease. The main hypothesis that the model tested was the idea that GSK3 is a link between amyloid ...

Computational model examines the pathways of Alzheimer's that strikes at the young

... and tangles and their influence in causing FAD. The model tested the hypothesis that certain variablesgenetic mutations in proteins and "tau" tanglesmight be predicative of the development of the disease. The main hypothesis that the model tested was the idea that GSK3 is a link between amyloid ...

Early family ties: No sponge in the human family tree

... explains Wrheide. "Our results support, after much controversy, a hypothesis that was already formulated back in 1848." The investigation also ... comprehensive study concerning the non-bilaterians proposed the unorthodox hypothesis that the comb jellies had already diverged from all other species even ...

The secret to chimp strength

... but allows us to perform delicate and uniquely human tasks. Walker's hypothesis stems partly from a finding by primatologist Ann MacLarnon. MacLarnon ... to the same degree, in great apes." Walker says that testing his hypothesis that humans have more motor neurons would be fairly straightforward. ...

January-February GSA Bulletin media highlights

... of groundwater from melting ice and dewatering of hydrous salts. Their hypothesis provides a unifying framework to explain perplexing relationships between ... features of BIFs. Because the Archean fossil record is notably poor, this hypothesis for BIF deposition is important because, if correct, it adds significant ...

Exercise increases brain growth factor and receptors, prevents stem cell drop in middle age

... these changes in mice over time, and find out why they happen. One hypothesis the researchers investigated is that the age-related decline in ... drop in the production of new stem cells in the hippocampus. The second hypothesis is that nerve growth factors -- which encourage new neural cell growth but ...

Female embryonic sexual development driven by universal factor

... Human Molecular Genetics . The findings lend support to a controversial hypothesis about mammalian sexual development. In the beginning in terms of their ... disrupt this pathway and lead to the development of ovaries. The "Z" hypothesis explained why SRY appeared essential for testes development. When it is ...

Rosella research could rewrite 'ring theory'

... or speciated, through 'ring speciation'," she says. The ring speciation hypothesis predicts that a species that spreads to new areas may eventually join back ... populations in inland south eastern Australia. "We rejected the ring hypothesis because it predicts only one region of genetic dissimilarity, which should ...

When fish talk, scientists listen

... For years they discussed fish social behavior with the roots of the hypothesis tested in the Science paper first published in 1997 and the research to test that hypothesis beginning in 2003. "The whole project began at the MBL," Bass says. "It's ...

The good, the bad and the smelly: USGS at the 2008 Coral Reef Symposium

... event provided the opportunity to test the compromised-host hypothesis on two species in the U.S. Virgin Islands. Researchers found that as water ... recovered by July 2006. These studies support the compromised-host hypothesis by indicating that disease prevalence and severity increase when colonies ...

Monarch butterflies help explain why parasites harm hosts

... it. The researchers crunched the numbers and found clear support of a hypothesis that is popular among scientists but, until now, had not been well studied ... their hosts, de Roode said. The results demonstrated that the trade-off hypothesis holds for monarchs in a controlled setting, but the researchers also ...

Elastic stresses influence formation of leaf veins

... Steffen Bohn, and Eduardo Jagla to further analyze a previously-proposed hypothesis that elastic stresses play an important role in leaf venation. To test whether this hypothesis could sustain a quantitative comparison with actual venation patterns, ...

CSHL scientists identify a mechanism that helps fruit flies lock-in memories

... researchers understand how memory works in the human brain. A Fruitful hypothesis Prior work had shown that Pumilio acts with other genes to shape the ... work is particularly satisfying, Dr. Dubnau noted, because the original hypothesis about Pumilio was extended by computations to make further predictions, ...

March GEOLOGY and GSA TODAY media highlights

... were laid down by flowing water. In this paper, Pelletier et al. test this hypothesis by computer modeling of water-based versus dry landsliding. Dry landslides ... paleo-Virgin River are the likely sources of this sediment. The remaining hypothesis - that the paleo-upper Colorado River dissipated and infiltrated in the ...

Researchers offer new theory for dogfish and skate population outburst on George's Bank

... of a migration to the area from adjacent or connected waters. This hypothesis challenges the current notion that the Georges Banks population is closed ... on connectivity among populations. The research team developed their hypothesis by analyzing survey data collected by the National Marine Fisheries ...

El Niño affected by global warming

... by pushing the ocean surface layer westwards. Confirmation of this hypothesis came from measurement of the organic carbon flux which is directly linked ... from a rising up of cold water by the process of upwelling (2). The hypothesis the researchers postulate suggests that, in a situation of climate warming ...

Sunbathing tree frogs' future under a cloud

... due to the risk of overheating and dehydration. The Manchester teams hypothesis is that global warming is leading to more cloud cover in the frogs natural ... which is more commonly used to examine the human retina and put their hypothesis to the test. As part of their studies, they want to use OCT to compare ...

Scientists discover novel way to remove iron from ferritin

... removed iron faster when the pores were open. "We wanted to prove a hypothesis that a small protein or peptide could bind to ferritin and could be used to regulate ferritin pores," said Dr. Theil. "Our hypothesis was correct. We proved that when a binding peptide of seven amino acids, ...

Why do so many species live in tropical forests and coral reefs?

... The latest development in a major debate over a controversial hypothesis of biodiversity and species abundance is the subject of a paper to be ... saga of neutral theory is an intriguing example of how a scientific hypothesis can fertilize stimulating new research while evolving over time in ...

Why do autumn leaves bother to turn red?

... pigments known as anthocyanins. Habinck's discovery supports a 2003 hypothesis put forward to explain why trees bother to make red pigments, by plant ... soil-leaf color connection wasn't made long ago is partly because Hoch's hypothesis was needed to put it into perspective. It also might be that many plant ...

Researchers find evidence linking stress caused by the Sept. 11 disaster with low birth weights

... when the foetus was more susceptible to the effects of stress. Another hypothesis is that the Christmas and New Year holiday was a particularly emotional ... attributable to preterm delivery, we think that our results support this hypothesis and the paper supports the idea that stressful community events can impact ...

Genetic differences in clover make one type toxic

... cyanogenic, Olsen said. Suicide not ruled out The second hypothesis explores the lurid possibility of plant suicide. In hypothesis two, we question the role of frequent frosts. The frosts could cause cell ...

Vitamin E trials 'fatally flawed'

... experts on antioxidants and disease. These trials supposedly addressed the hypothesis that reducing oxidative stress could reduce cardiovascular disease. But ... and therefore we dont know whether it was actually reduced or not. The hypothesis was never really tested. The level of vitamin E that clearly can be ...

MIT unraveling secrets of red tide

... type of cascade may be impossible," said Jamison. "Because Nakanishi's hypothesis accounts for so much of the complexity in these toxins, it makes a lot of ... Jamison and Vilotijevic's work offers the first evidence that Nakanishi's hypothesis is feasible. Their work could also help accelerate drug discovery ....
Other Contents
(Date:9/29/2014)... Oktoberfest is here, and that means ... for a cold one, taking that first ... chemicals have reacted to form compounds that ... Reactions explains why beers get skunky, and ... brews from going bad. Learn all about ...
(Date:9/29/2014)... available in French . ... number of days an expectant mother was deprived of ... profile of her child, a new study finds., Scientists ... University have detected a distinctive ,signature, in the DNA ... Quebec ice storm. Five months after the event, researchers ...
(Date:9/29/2014)... researchers at the University of Cambridge has shown that ... most of Greenland is more sensitive to climate change ... rising sea levels that threaten coastal communities worldwide. , ... levels of meltwater created and spilled into the ocean ... new model also takes into account the role that ...
Breaking Biology News(10 mins):Greenland Ice Sheet more vulnerable to climate change than previously thought 2Greenland Ice Sheet more vulnerable to climate change than previously thought 3
(Date:9/30/2014)... 2014 Julie Kuriakose, MD; ... , will discuss how restaurants can become more allergy-friendly ... dietary restrictions at the 2014 Allergy Eats Food ... October 21 in New York City. , “I’m extremely ... to such an engaged industry audience. As food allergies ...
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