reaction 2 8

Tag: "reaction" at biology news

Hay fever can send work productivity down the drain

...uch as steroids that help block the body's natural reaction to allergens,?she continued. Participants who self...he study underwent a blood test that evaluates the reaction of immunoglobulin E (IgE) to specific allergens, such as pollen from grass and trees. IgE is an anti...

MIT biologists solve vitamin puzzle

...synthesizes the fragment, and they outline a novel reaction mechanism that requires cannibalization of another...ormally, the B2-derived cofactor would assist in a reaction by temporarily holding electrons and then giving them away. Such cofactors are not consumed in the r...

RNAi shows promise in gene therapy, Stanford researcher says

...e hints that the technique could induce an immune reaction or switch off the wrong gene or genes. In work last year, Kay confirmed those findings but also showed a possible way around those toxic effects by selecting particular RNA sequences. "One benefit of RNAi gene therapy is that it uses the body's...

Study uncovers a lethal secret of 1918 influenza virus

...e response that seems to derail the body's typical reaction to viral infection and instead unleashes an attack...ost immune response." The same excessive immune reaction is characteristic of the deadly complications of H5N1 avian influenza, the strain of bird flu presen...

Freeze! Scientists film proteins at work by freezing them at different states

...ze the protein in three different states while the reaction took place. In order to make sure that they “trapped?the right intermediate states, the researchers used the technique of Raman spectroscopy. This technique provided them with strong evidence that the states were the appropriate ones by showing them ...

Inflammation may play role in metastasis of prostate cancer

... invade advanced prostate tumors, triggers a chain reaction in which IKKa is activated, allowing it to enter the nucleus of the cancer cell, repressing Maspin. IKKa is a key linchpin in the pathway that turns off the Maspin gene and activates the metastatic program. The new results also support the view tha...

Twin studies reveal genetic components leading to cardiac and kidney disease

...produced in the adrenal gland that are released in reaction to stress. The study measured the plasma concentration of ET-1 in about 300 twins. The results establish and verify a previously unsuspected link between catecholamines and the endothelial system, showing that this link is due to a genetic variation ...

RNA enzyme structure offers a glimpse into the origins of life

...yme, or "ribozyme," that carries out a fundamental reaction required to make new RNA molecules. Their results ...e that joins two RNA subunits together in the same reaction that is carried out in biological systems by the protein known as RNA polymerase. Their findings are...

Penn study on olfactory nerve cells shows why we smell better when we sniff

..., plus the fact that both types of stimuli produce reaction in olfactory nerve cells, which control how our br...imulus into the nose. As expected, this produced a reaction in the olfactory neurons, the primary sensory neurons in the nose that perceive odors. Researchers ...

Progress toward artificial photosynthesis?

... successfully activated CO 2 for use in a chemical reaction by using a special new type of metal-free catalyst...has an additional OH group). The by-product of the reaction is carbon monoxide (CO), which can be used directly for chemical syntheses. From a purely formal ...

Anti-wrinkle compound causes pathological reaction in skin cells

...in many antiwrinkle products causes a pathological reaction in skin cells. Guillaume Morissette, Lucie Germain, and François Marceau present their conclusions about the mode of action of this substance—called DMAE—in the latest edition of the British Journal of Dermatology. DMAE (2-dimethylaminoethanol) is u...

Bypassing eggs, flu vaccine grown in insect cells shows promise

... smaller dose and the larger dose caused an immune reaction generally considered effective for fighting off the flu, with the larger dose creating a stronger immune response. The side effects of the vaccine were the same as those usually reported from a typical flu shot ?mainly mild arm pain. Then, in the ...

Tracking sperm whales and jumbo squid

...d and oxygen levels are extremely low, the squid’s reaction time, visual acuity and swimming speed may be significantly impaired because of an inadequate supply of oxygen—a condition known as hypoxia. "Squid need a constant supply of oxygen to support their metabolism," Davis added. "Sperm whales, on the o...

Navigable nanotransport

...epends largely on the solvent in which the linking reaction takes place. The researchers used this method to produce capsules with diameters ranging from 50 to 600 nm. The little disks used in this process deserve special consideration: Kim and his colleagues chose to use curcurbiturils. These disk-shaped ...

Mutation improves memory, may lead to memory-enhancing pill

...cking the enzyme that performs the phosphorylation reaction have a superior ability to remember new things under certain training conditions. “Those results led us to suspect that decreasing the phosphorylation of eIF2a enhanced memory storage,?Costa-Mattioli said. In an effort to validate their earlier...

Glucose triggers brain cell death in rats after hypoglycemic coma

...e, Swanson observes that "as clinicians, our first reaction when we see a patient in hypoglycemic coma is to give lots of glucose, fast. But our rodent model makes it clear that overshooting glucose levels is very bad for rat brains. The way we treat patients for hypoglycemia may have to be reevaluated." S...

Researchers from the University of Navarra analyze new kinds of cancer-fighting antibodies

...immune system cells in order to provoke a stronger reaction against cancer. This has the advantage of exploiting a mechanism with an action distinct from the other strategies currently being used to treat cancer, and is capable of interacting with the current treatments so as to make both forms of treatment m...

Transfusion expert urges wider use of filtered blood

...transfused blood reduces the chances of a negative reaction by the host immune system. In 1998 the University's Strong Memorial Hospital was among the first hospitals in the country to begin using leukoreduced blood for all cardiac surgery cases. Since then, the hospital has extended its leukoreduction practi...

2 brains -- 1 thought

... addition to this, can differ in its intensity and reaction time. The entirety of all possible networks of a defined dynamics resembles a complex figure in a multidimensional space. Here, every point on the surface specifies the data required to determine a network with the desired dynamics. Memmesheimer and ...

Risk of HIV transmission highest early in infection

...pment of affordable tests such as polymerase chain reaction assays to directly monitor the presence of the virus, instead of relying on the current method of antibody screening. In addition, Dr. Pillay and Fisher asserted that more innovative and effective prevention strategies are needed to stem HIV trans...

1 2 3 4 5 6 7 8 9