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Tag: "reaction" at biology news

Hydrogen and methane provide raw energy for life at 'Lost City'

...hermal vent field via serpentinization, a chemical reaction between seawater and the mantle rock on which Lost City sits. The resulting fluids are 105 F to 170 F. At the other kind of field, first discovered in the early 1970s, volcanic activity or magma drives venting and fluids can reach 700 F. The vents at...

Natural Killers Could Lead to New Hepatitis Treatments

... in the liver due to hepatitis. Hepatitis can be a reaction to viruses, parasites such as malaria or other infections. Learning to “call off?the NKT cell's pursuit and attack could offer a treatment for hepatitis and associated complications. The researchers, led by Dan Littman, a Howard Hughes Medical Insti...

Shark attack worries? Driving to the beach is more deadly

... each year - about 90 worldwide - from an allergic reaction to eating peanuts. Despite several attacks in Florida recently - one that killed a 14-year-old girl - shark attacks remain very rare when you put it all into perspective, McEachran believes. "There are millions of people in the water at any given m...

New HIV drug candidate developed in Sweden

... each year - about 90 worldwide - from an allergic reaction to eating peanuts. Despite several attacks in Florida recently - one that killed a 14-year-old girl - shark attacks remain very rare when you put it all into perspective, McEachran believes. "There are millions of people in the water at any given m...

Agilent Technologies introduces advanced zebrafish, mouse microarrays for stem cell and developmental biology research

... each year - about 90 worldwide - from an allergic reaction to eating peanuts. Despite several attacks in Florida recently - one that killed a 14-year-old girl - shark attacks remain very rare when you put it all into perspective, McEachran believes. "There are millions of people in the water at any given m...

Researchers develop promising new gene network analysis method

... a deadly "oncoprotein" is switched on, what chain reaction of gene activity does it set off? The protein, c-...s web of connections would be to set off the chain reaction and study it over time. To make that happen, Brown researchers came up with a clever experiment. Jo...

Scientists take aim at virulent bacteria by decoding machinery of key control enzyme

...eotide in the DNA sequence GATC through a chemical reaction known as methylation. Methylation is a biological ... drug to inhibit this particular enzyme's chemical reaction or its DNA binding process. This kind of rationally designed drug could be an alternative against in...

Scientists discover the body's marijuana-like compounds are crucial for stress-induced pain relief

...ims have a period of time in which the body's pain reaction is delayed. This effect is called "stress-induced analgesia." By the mid-1990s, researchers had targeted the sites of action of the brain's naturally occurring marijuana-like compounds as having a crucial role in blocking pain, but no one understood ...

Environmental chemical cocktail may sabotage sperm

...enetrate the coverings of the egg. If the acrosome reaction happens before a sperm reaches the egg, then ferti... move was unaffected, but the spontaneous acrosome reaction meant that they were unable to fertilise an egg," said Prof Fraser. She said that the chemicals wer...

Fragment of yellow fever virus may hold key to safer vaccine

...es, a person's own immune system, disrupted by its reaction to yellow fever virus infection, may lead to death rather than recovery. The most recent study was led by Stephane Daffis, a graduate student at Philipps-Universitat in Marburg, Germany. Using blood samples from two yellow fever patients who had rec...

New type of rejection blocker protects kidneys after transplant

...of treatment based on blocking the immune system's reaction to a transplanted organ without hampering the body's ability to fight diseases and infections, according to Vincenti, clinical professor of medicine and surgery at UCSF and a kidney transplant specialist at UCSF Medical Center. "This is the first cl...

Microreactor efficiently regenerates cofactors for biocatalysis

...m close to the cathode, and a normally unfavorable reaction equilibrium is driven into the desired direction o.... "In large batch reactors, a spontaneous reverse reaction prevents the regeneration of essential cofactors," Kenis said. "The absence of a bulk phase in our m...

Elderly mice yield clues to the process of growing old

...g theory holds that oxidative stress -- the body's reaction to oxygen and the production of reactive, cell-damaging molecules known as free radicals -- is responsible for the aging process. According to the new Science report, markers of oxidative stress did not parallel the accumulation of mitochondrial gen...

Neurologix announces positive results of gene therapy clinical trial in Parkinson's disease

...with no evidence of adverse effects or immunologic reaction related to the study treatment. Furthermore, patients in the trial, at one year, exhibited a statistically significant improvement (27%, p = .04) in motor function on the side of their body correlating to the treated part of the brain, as measured b...

Bacteria recognize antimicrobials, respond with counter-defenses

...eptides as a warning signal. This alarm sets off a reaction inside the bacteria to avoid destruction. University of Washington (UW) and McGill University researchers have revealed a molecular mechanism whereby bacteria can recognize tiny antimicrobial peptide molecules, then respond by becoming more virulent...

'Underground' tunnels discovered as means for communication between immune system cells

...lightest poke to a single cell can set off a chain reaction whereby cell after cell discharges bursts of calci...first sense the presence of an antigen and why the reaction is cell-specific, the authors decided to look at calcium flux, a well-recognized early measure of st...

Results of world's first gene therapy trial for arthritis show approach safe, feasible

...ells, and hence, setting off the destructive chain reaction that follows. In essence, they needed a way to plug up the receptor and found such a device in a gene encoding the IL-1 receptor antagonist, or IL-1 Ra. Because it was the first trial of its kind and safety was a key concern, the protocol was design...

New law for resolution allows unprecedented sharpness in fluorescence microscopy

...stantial improvements in the quantification of the reaction kinetics of organic molecules (Phys. Rev. Lett., A...ds that use fluorescence fluctuations to study the reaction kinetics of molecules in solutions. The smaller the focal volumes, the more effective and sensitive ...

Water management in cells

...fic channels that transport water. Slow organic reaction In addition to water channels and ion channels, organic particles play an important role. If the salt balance is disrupted, so-called 'volume-regulated anion channels' are first of all activated. These ensure that chloride ions leave the cell. Furt...

Firefly protein lets researchers monitor molecule linked to cancer

... according to Piwnica-Worms, is that the potential reaction patterns in the NF-KappaB pathway form an hourglass-like shape, fanning out among many options at the start, narrowing in the middle, and again fanning out among many options at the end. "At the waist of that hourglass is IKK," he explains. "This ap...

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