The pH of calcium ions controls ion channel opening

Ion channels are pores in the membrane of cells or cell organelles. They allow positively or negatively charged particles, so-called ions, to be transported across the membrane. Biochemists at Johannes Gutenberg University ...

Electric shocks kill bacteria

Low temperatures and an acidic environment create the ideal conditions for an effective method of inactivating Listeria (and other germs) in the processing of whey protein solutions – without destroying valuable nutrients. ...

Making composite material smart with precious metal

Doping polymer brushes with gold nanoparticles results in a switchable composite material which changes its thickness depending on the pH value. The research by physicists at the TU Darmstadt, published in the journal Soft ...

Universal pH regulated assembly of DNA nanostructures

DNA, the carrier of genetic information, has become established as a highly useful building material in nanotechnology. One requirement in many applications is the controlled, switchable assembly of nanostructures. In the ...

When toxins preserve populations

Some soil bacteria can alter their environment in such a way as to endanger their own survival – unless, that is, toxins do not impede their growth beforehand.

Wheat gluten found to restore bonds in brittle human hair

A team of researchers from Jiangnan University in China and the University of Nebraska in the U.S. has found that integrating wheat gluten into a shampoo helps restore bonds, making hair less brittle. In their paper published ...

Measuring optimally with spheres

Bio-reactors are the cooking pots of biochemists and bio-technologists, in which pharmaceutical agents, enzymes or nematodes are produced for the purpose of biological pest control. A nutrient solution (such as heat, oxygen, ...

New biosensor zymonic acid shows changes in pH value

Tumors, inflammation and circulatory disorders locally disturb the body's acid-base balance. These changes in pH value could be used for example to verify the success of cancer treatments. Up to now, however, there has been ...

Self-assembled nanostructures can be selectively controlled

Plasmonic nanoparticles exhibit properties based on their geometries and relative positions. Researchers have now developed an easy way to manipulate the optical properties of plasmonic nanostructures that strongly depend ...

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