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Tag: "converting" at biology news

Plastic that grows on trees

...ls called halides, which “in general work well for converting fructose to HMF,” Zhang said — but not so well whe...romium chloride — was by far the most effective at converting glucose to HMF with few impurities and, as such reactions go, at low temperature, 100 degrees centig...

Fat overrides effects of vitamin C

...against the formation of these nitrosocompounds by converting the nitrosating species back into nitric oxide (NO). However, NO diffuses rapidly to lipids, where it reacts with oxygen to reform nitrosating species. The presence of lipids therefore overrides the protective effect of vitamin C against the formatio...

Discovery could lead to better control of hemorrhagic fever viruses

...aborated with Farzan's lab to identify angiotensin converting enzyme2 (ACE2) as the receptor for the SARS virus. ...

ConocoPhillips establishes $22.5M biofuels research program at Iowa State

...s, said ConocoPhillips is especially interested in converting biomass to fuel through fast pyrolysis, a process that uses heat in the absence of oxygen to decompose biomass into a liquid product. This so-called bio-oil can be used as a heating oil or can be converted into transportation fuel at petroleum refine...

New biofuels process promises to meet all US transportation needs

...by suppressing the formation of carbon dioxide and converting all of the carbon atoms to fuel. When conventional methods are used to convert biomass or coal to liquid fuels, 60 percent to 70 percent of the carbon atoms in the starting materials are lost in the process as carbon dioxide, a greenhouse gas, whe...

Researchers create artificial enzyme that mimics the body's internal engine

...transfers the electrons to the molecule of oxygen, converting it into two molecules of water. "CcO has to behave perfectly," Collman said. "If it adds less than four electrons, it can produce partially reduced oxygen molecules, and these are known to be very toxic." The two most deleterious forms of reduced ...

How to manage forests in hurricane impact zones

... of forests." Vulnerability can be lessened by converting to species that are less susceptible to hurricane damage, by controlling stand structure, and by dispersing harvesting and thinning operations. The authors simulated the potential damage to 9 theoretical stands of pine trees, looking at how each woul...

Cellulose nanocrystal research could lead to new vaccines, computer inks

...o the people using them. A typical remedy involves converting the nanocrystals to a powder. This has risks as well, as the powder can be a serious health hazard if inhaled. The ink jet printing allows for a safe method of deposition of the nanocrystals. ...

Virginia Tech's System X supercomputer provides super tool for simulation of cell division

...ame temperature, and try to deduce the formula for converting between the temperature scales." Previously, Tyson worked with simpler models whose parameters could be determined by trial and error, a process modelers call "parameter twiddling." But he and his coworker, Kathy Chen, wanted to characterize all t...

Anticipation plays a powerful role in human memory, brain study finds

...ed that those subjects' brains had already started converting short-term memories of the images into longer-lasting ones. Mackiewicz says the anticipation of an uncomfortable situation probably kick-starts a kind of "arousal or fear circuitry" in the brain, which in turn helps to reinforce old memories. "...

Poor athletic performance linked to vitamin deficiency

...rients are necessary during the body's process for converting proteins and sugars into energy, and are used during the production and repair of cells, including red blood cells. For active individuals a marginal deficiency in the nutrients may impact the body's ability to repair itself, operate efficiently an...

Beyond the book: Software automates access to brain atlases

...e illustrator, and then using a JavaScript program converting the files into a standard vector graphic (SVG) format. The SVG images are stored on the users system and organized using the software, which works on Linux, Windows and Macintosh operating system computers. The viewer software is open source and f...

Microbe fixes nitrogen at a blistering 92 C

...eeded to produce nitrogenase ?an enzyme capable of converting nitrogen gas, that's unusable by life, to a form like ammonia that is useable ?arose before the three main branches of life ?bacteria, archaea and eukaryotes ?diverged some 3.5 billion years ago, according to oceanographer Mausmi Mehta, who recently ...

Uniform tungsten trimers stand and deliver

...ivity studies of metal oxides used as catalysts in converting hydrocarbons into fuels and value-added chemicals. "There is a striking difference between commercial catalysts and the new model system," said Mike White, the UT professor leading the PNNL Institute for Interfacial Catalysis. Variability in commerc...

Bacterial 'switch gene' regulates how oceans emit sulfur into atmosphere

...ntrol how much sulfur rises into the atmosphere by converting a compound called DMSP, or dimethylsulfoniopropionate, to DMS or to sulfur compounds that are not climatically active. Moran and her team discovered a gene that controls whether or not these sea drifters create DMS that rises into the air. "Isolati...

Eat less, weigh more? Enzyme makes lean mice 'susceptible' to dietary fat

...ll cells in the body to store the excess energy by converting it to fat. Weight gain results when food intake greatly exceeds energy expenditure. But when the brain's appetite/energy regulator is out of whack, so are the rules for gaining and losing weight. "How do you know when to stop eating?" asks M. Daniel...

New study shows antibiotic may protect the heart

... Mitochondria are cellular organelles critical for converting oxygen into ATP, the key fuel for cellular function. "Rapamycin may one day be beneficial as a potential therapeutic strategy to limit cell death caused by ischemia or reperfusion injury, and possibly long-term prevention of ventricular remodeling ?...

Immune system police learn early and sometimes badly

...king endogenous tissue likely would be among those converting to protective regulatory cells, Dr. Ignatowicz says. "We did not find that does not happen, but it's not the major mechanism for generating regulatory cells in the body," Dr. Pacholczyk says. All T cells are made in the bone marrow then move to th...

Methane-belching bugs inspire a new theory of the origin of life on Earth

...es could then have generated biochemical energy by converting this derivative back to acetate. Excreting acetate...ecules--including those that this microbe makes by converting carbon monoxide into methane--are produced by multi-enzyme protein machines within the cell membrane...

Ecosystem services and invasive species

... costs of two models of development in the region: converting upland forest to low-density homes and the subdivision of valley farmlands. Using tax parcel maps and GIS, the group compared the history of land use, sale price and development trajectories for two 1,500-acre adjacent land tracts. McGrath will dis...

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