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Tag: "unknown" at biology news

Researchers find 24 species believed new to science in Suriname rainforest

... survey in 2006 demonstrate the value of exploring unknown regions such as Suriname’s rainforest to assess the need to conserve them. The study sponsored by two mineral companies – BHP Billiton Maatschappij Suriname (BMS, a subsidiary of BHP Billiton) and Suriname Aluminium Company LLC (Suralco, a subsidi...

Researchers track how spores break out of dormant state

Tapping into the unknown world of awakening dormant bacterial spores, researchers have revealed through atomic force microscopy (AFM) the alterations of spore coat and germ cell wall that accompany the transformation from a spore to a vegetative cell. When starved of nutrie...

A new plant-bacterial symbiotic mechanism promising for crop applications

...ng to identify the genes involved in producing the unknown signal molecule that plays the role of Nod factor, prompted the team’s hypothesis that a molecule similar to a plant hormone (4), cytokinin, could act in the mechanisms by triggering nodulation. The discovery of the nature of the signal molecule itse...

Newly found sensing system enables certain bacteria to resist human immune defenses

...the gene regulation region; and apsX, which has an unknown function that Dr. Otto’s group is investigating. Studies show that all three components of aps must be present for the system to function and effectively protect bacteria from AMPs. “We are aware that for gram-negative bacteria, PhoP/PhoQ has been...

Massive herds of animals found to still exist in Southern Sudan

...in a region after 25 years of civil war, virtually unknown to the world at large.” “This is a homecoming for the Wildlife Conservation Society, which conducted the last wildlife surveys of white-eared kob in the region some 25 years ago before the civil war,” said Dr. Steven Sanderson, president and CEO of...

Warning from Asian bees

...lain undiscovered for at least three months, it is unknown how many more swarms might exist and how far afield they may have flown. Within a one kilometre radius from the first colony, disturbed in the mast of a yacht undergoing repairs after two years docked at a wharf in Cairns, three more swarms were f...

Weizmann Institute scientists develop a general 'control switch' for protein activity

...e and effective tool for exploring the function of unknown proteins, and in the future the new technique may find many additional uses. The switch has a genetic component and a chemical component: Using genetic engineering, the scientists insert a short segment of amino acids into the amino acid sequence...

Human genetic 'deserts' are teeming with significant life

...lised often in a tissue-specific manner previously unknown set of exons [the regions of DNA within a gene that are transcribed to messenger RNA] outside the current boundaries of the annotated genes ”, Professor Reymond will say. He and his team are among the many international collaborators working ...

CU study reveals why starling females cheat

...gh it does not reap additional help. As yet, it is unknown how females detect the genetic similarities between themselves and their mates, though other species of birds appear to adopt similar mating strategies. "This is the first study to show that individuals from the same population mate with extra-pai...

Resistant HIV quickly hides in infants' cells

...om mother to child is still a problem, and much is unknown concerning how such transmission affects the responses of infants to various drug treatments. The study, conducted by Deborah Persaud, MD, of Johns Hopkins University School of Medicine and colleagues working throughout the United States, analyz...

'Personality-gene' makes songbirds curious

...ified the reaction of the bird towards each of two unknown objects that had been put in its cage. One such novel object was a pink panther (see figure 2). The results from the group of selected birds were confirmed with data from free-living, unselected great tits. In the forest-living birds, the scienti...

Role of noise in neurons

...ns down fibers of less than 0.5 ìm in diameter was unknown until this paper. Using detailed models of rodent and squid axons and stochastic simulations, the authors performed experiments, now published in PLoS Computational Biology, which took several months to simulate a few milliseconds of real time in ...

Risk of lymphoma increases with hepatitis C virus infection

...John E. Niederhuber, M.D. "Since so much is still unknown about the causes of lymphoma, establishing which factors contribute to the disease is the first step in finding ways to reduce its incidence and lessen mortality." HCV causes hepatitis, which is an inflammation of the liver. The HCV virus is car...

New host species for avian influenza identified

...n wild migratory birds in Europe. Seven previously unknown host species for H5N1 were identified, including four species of goose and the common gull, and dabbling ducks were found to harbor all but two known influenza virus subtypes. The ecological and epidemiological data provided on influenza A virus s...

Slowing the racing heart

...said Solaro. "Identification of this previously unknown molecular mechanism for slowing the heartbeat may offer new avenues of diagnosis, drug design and treatment of many common heart diseases," said Solaro. "Further, now that we know something of how this enzyme works in the pacemaker cell, we may di...

DOE JGI sets 'gold standard' for metagenomic data analysis

...matis, "is that you end up with large fragments of unknown accuracy and a substantial number of sequences that fail to fit onto those larger fragments. On many occasions, this information is not taken into account, depriving the analysis of valuable information embedded in that sequence. The solution pro...

Decoding protein structures helps illuminate cause of diabetes

... produced by the same cells that make insulin. An unknown trigger prompts the protein to fold into sharp fibers that poke holes in pancreatic cells, killing them. Though scientists already have a good idea of the healthy "before" and dangerous "after" hIAPP structures, the steps in between remain somew...

NIDA study identifies genes that might help some people abstain from smoking

...187 of these genes, but 34 have functions that are unknown at present. We also found that at least 62 of the genes that we had previously identified as playing roles in dependence to other drugs also contribute to nicotine dependence.? Genes that harbor variants that contribute to both success in quitting ...

Fish extinctions alter critical nutrients in water, study shows

...nto simulating species loss." For example, it is unknown whether surviving species can truly compensate for extinctions. In a study of two species of fish in the Venezuelan river that eat mud from the river bottom, Flecker found that the rarer of the two species was unable to make up for the loss of the mo...

2 brains -- 1 thought

...sity." This procedure resembles juggling with many unknown quantities and requires great computational 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 p...

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