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Tag: "protons" at biology news

Carnegie Mellon scientists develop tool that uses MRI to visualize gene expression in living animals

...detects and analyzes signals given off by hydrogen protons in water molecules after they are exposed to a mag...he magnetic field in its proximity, causing nearby protons to give off a distinctly different signal. The resulting image reveals dark areas that indicate the ...

Microbial fuel cell: High yield hydrogen source and wastewater cleaner

...are electrochemically assisted to combine with the protons and produce hydrogen gas. A voltage in the range of 0.25 volts or more is applied to the circuit by connecting the positive pole of a programmable power supply to the anode and the negative pole to the cathode. The researchers call their hydrogen-p...

It's electric: Cows show promise as powerplants

... were separated by a special material that allowed protons to move from the negative (anode) chamber into the positive (cathode) chamber. This movement of protons, along with the movement of electrons across the resistor and wire that connects the two electrodes, creates electrical current. The anode chambe...

Drug resistant avian influenza viruses more common in Southeast Asia than North America

... (protons) to enter the flu virion. This influx of protons allows the virus to shed its coat after it enters a cell-an essential step in the replication of the virus. Amantadine inhibits the function of the M2 protein and thus stops viral replication. "By analyzing the sequence of the transmembrane part of...

'Acid rain' and forest mass: Another perspective

... the compound, thus forming nitrate and liberating protons that acidify the soil. Amongst the effects of the deposition of these compounds on the forest mass are the well-known nutrition disorders of the same. One classic effect is that of cation deficit (particularly magnesium) due to the washing both of th...

New technique helps researchers determine amino-acid charge

...urately detect the association and dissociation of protons to and from individual amino-acid residues in real..., which can acquire a positive charge upon binding protons and become neutral upon releasing them. "One thing is the proton affinity of an amino-acid residue ...

Superconducting magnet attracts molecular research

...ers, said Pochapsky. The electrons, neutrons and protons within the atom have an intrinsic property known as "spin" and within the electromagnetic field created by the magnet, the frequency of the spinning motion of the atoms reveals information about the physical, chemical, structural and electronic chara...

A salty tale: New bacterial genome sequenced from ancient salterns

... pump, capturing light energy and using it to move protons across the membrane and out of the cell. In doing so, the protein maintains a balance of ions inside and outside the cell. "It's very unusual to find the two different types of rhodopsin in the same organism," Mongodin says. "S. ruber may have inde...

Production of key Alzheimer's protein monitored for first time in humans

... the leucine are carbon atoms with 13 neutrons and protons in their nucleus instead of the more common 12 neutrons and protons--in scientific parlance, carbon 13 instead of carbon 12. "Normally only about 1.1 percent of the carbon atoms in our bodies are carbon 13--the vast majority is carbon 12," Bateman ...

UCLA scientists strengthen case for life more than 3.8 billion years ago

...most common isotope form of carbon, containing six protons and six neutrons) to 13C (a rarer isotopic form of carbon, containing six protons and seven neutrons). The light carbon, 12C, is more than 3 percent more abundant than scientists wou...

'Pinball protons' created by ultraviolet rays and other causes can lead to DNA damage

... are numerous targets for processes that knock the protons off. The lesions are breaks in the hydrogen bonds...ormation, the new study is the first evidence that protons do the same thing. The study in PNAS also has other implications. Researchers are beginning to unde...

One therapeutic dose of radiation causes 30 percent spongy bone loss in mice

...of low-dose radiation of multiple types, including protons and heavy ions, Bateman said. Source "A murine model for bone loss from therapeutic and space-relevant sources of radiation," by S.A. Hamilton, N.D. Travis, J.S. Willey and T.A. Bateman, Department of Bioengineering, Clemson University, Clemson...

With record resolution and sensitivity, tool images how life organizes in a cell membrane

...al properties because they have the same number of protons but that differ in mass because they have a different number of neutrons. Isotopes do not change the chemical structure of the molecules that they label. In contrast, the dyes commonly used in biological studies for labeling change the structure of t...

Cholera pathogen reveals how bacteria generate energy to live

...ost cells, including human cells, use gradients of protons for this energy conservation function, but enzymes that work with sodium ions are ideal for experimental study, according to Barquera. Sodium is easier to trace and its concentration can be changed without affecting pH, which is a complication with p...

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

.... Deuterium, a natural isotope of hydrogen (with 2 protons rather than one) could be used routinely. Previous successes in extending lifespan have involved withdrawing food to the point of near starvation, a process called caloric restriction. ...

Shedding new light on proteorhodopsin

...n is a light-driven proton pump, able to transport protons across cellular membranes in order to create store...tive force (pmf), the electrochemical potential of protons across cellular membranes that bacteria use as the energy source to, among other functions, power th...

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