chemical 2 6

Tag: "chemical" at biology news

Speeding 'fingertip' discovery -- 20 years of protein info in 1 place

...eads the makeup of proteins to identify nearly all chemical changes nature makes by adding phosphate to protei...ins. “Phosphorylation is essential for controlling chemical reactions in our cells?protein factories, and phosphorylation gone awry has been implicated in sever...

Prehistoric mystery organism verified as giant fungus

... of the weirdest organisms that ever lived. Their chemical analysis indicates that the organism was a fungus, the scientists report in the May issue of the journal of Geology, published by the Geological Society of America. Called Prototaxites (pronounced pro-toe-tax-eye-tees), the organism went extinct appr...

Experience affects new neuron survival in adult brain; study sheds light on learning, memory

...e dentate gyrus. After injecting mice with a chemical used to mark proliferating cells, the researchers ...four weeks and four months after injections of the chemical marker. This comparison indicates that only young neurons are affected by the repeated experience; o...

Walking molecule now carries packages

...bstance of a large class of dyes and pigments. Its chemical formula is C14H8O2. The UCR study used a scanning tunneling microscope in Bartels's laboratory that gives a precise picture of individual molecules. Experiments took place on a highly polished copper surface, cleaned so that only the desired molecu...

Deep in the ocean, a clam that acts like a plant

...ay have got its start with microbes living on such chemical reactions, before the evolution of photosynthesis. "And they’re just plain interesting," Eisen added. If you were thinking that giant clams sound tasty, think again. The hydrogen sulfide gives them a strong smell of rotting eggs. ...

Cells use 'noise' to make cell-fate decisions

...omponent. No two cells are alike in terms of their chemical composition." Conventional scientific thinking has been that the random nature of such fluctuations within cells interferes with the reliable operation of biological systems. However, Dr. Süel's research team hypothesized that noise in one particu...

Microfluidic chip helps solve cellular mating puzzle

...ated protein kinases, or MAPKs, through a chain of chemical reactions. First, sensors on the surface of a yeast cell pick up signals that a mating partner is nearby. Then the message is passed down toward the cell’s control center, the nucleus. The messengers that carry it to the nucleus are MAPKs, which d...

Salamanders suffer delayed effects of common herbicide

... studies, even extremely low concentrations of the chemical may be deadly to amphibians in the long run. "W...consider recovery processes, persistent effects of chemical exposure, or interactions among individuals within and between species that can affect our estimates...

Scientists map air pollution using corn grown in US fields

... then converted them to graphite using a series of chemical reactions. The graphite then was analyzed in the W.M. Keck Carbon Cycle Accelerator Mass Spectrometer, which measures a rare isotope of carbon, called radiocarbon. Carbon dioxide derived from fossil fuels contains no radiocarbon so it is easily disti...

Bacteria could steady buildings against earthquakes

...aid. There are no toxicity problems, compared with chemical methods. The treatment could be done after construction or on an existing building, and the structure of the soil is not changed -- some of the void spaces between grains are just filled in. DeJong and his collaborators are working on scaling the ...

Lower carbon dioxide emissions from coal-fueled power plants possible with technology development

...m coal-fueled power plants is being developed by a chemical engineer and his colleagues at The University of T...sorship in Chemical Engineering, will optimize the chemical and mechanical features of a carbon capture technology that uses a liquid amine chemical. “We are...

Scientists unravel clue in cortisol production

... increase their production of cyclic AMP (cAMP), a chemical that encourages proteins to interact. So they began by causing the cells to make more cAMP. Then as the proteins assembled on the DNA, they tested the cells at different intervals in order to get a snapshot of which proteins were interacting, both wi...

Scripps Research study reveals new activation mechanism for pain sensing channel

... shows that TRPA1 activation is directly linked to chemical insult." "Cysteines, one of the twenty buildin...larity; instead, they share a common potential for chemical reactivity, and their binding is long-lasting." TRPA1 is not unique among proteins to be activate...

Meat and two neutrons -- the key to a longer life

... it could be very relevant to the rates of several chemical and enzymatic processes relevant to ageing 'It is a highly novel idea,' he says. 'But it remains to be seen whether it can be the source of practicable therapies, but it is a prospect that certainly cannot be ruled out.' Charles Cantor, a professo...

Baby fish 'smell their way home'

...bies home. "Every reef gives off its own unique chemical signature, a rich mixture of the proteins and amino acids emitted by corals, all the plankton and mucus from its life. We think baby fish can pick this up and distinguish it from other reefs. "We think some fishes then choose currents that smell ...

In presence of fragrant cleaning products, air purifiers that emit ozone can dirty the air

...ted volatile organic compounds such as limonene ?a chemical added to cleaning supplies that gives them a lemon fragrance ?to create additional microscopic particles, scientists found. Certain ionic purifiers emit ozone as a byproduct of ionization used for charging airborne particles and electrostatically att...

Honeydew honeys are better antioxidants than nectar honeys

...e 36 honeys was exposed to a range of physical and chemical tests. Honeys with high antioxidant properties (measured by the DPPH test) also had high total polyphenol content, net absorbance (as colour parameter), pH and electrical conductivity. “These laboratory results show some aspects that people could ...

Liposuctioned fat stem cells to repair bodies

...niversity of Oslo in Norway has identified certain chemical marks that allow him to predict which, among the h...es but with a cell’s epigenetic status, the subtle chemical modifications of DNA and its surrounding histone proteins. Epigenetic marks contribute to switching ...

Ultrathin films deliver DNA as possible gene therapy tool

...do the most good. Lynn, a UW-Madison professor of chemical and biological engineering, has used his nanoscale films to coat intravascular stents, small metal-mesh cylinders inserted during medical procedures to open blocked arteries. While similar in concept to currently available drug-coated stents, Lynn's...

Scientists identify specific enzymes that make meningitis hard to fight

...xidative stress. Oxidative stress damages the base chemical compounds of the bacteria's DNA. This should lead to cell death and the defeat of the bacteria. However, the virulent meningitis bacteria are able to repair this harmful damage and are therefore unaffected by the body's defences. The research team...

1 2 3 4 5 6 7 8 9 10