Researchers develop microscopic theory of polymer gel

1 day 11 hours ago
Russian scientists have proposed a theory of phase transformation in polymer gels. It explains the mechanisms of the dramatic reduction in volume of zwitterionic hydrogels when they are cooled. The results are published in the journal Chemical Communications (ChemComm).

Wearable sensors that detect gas leaks

1 day 13 hours ago
Gas accidents such as toxic gas leakage in factories, carbon monoxide leakage of boilers, or toxic gas suffocation during manhole cleaning continue to claim lives and cause injuries. Developing a sensor that can quickly detect toxic gases or biochemicals is still an important issue in public health, environmental monitoring, and military sectors. Recently, a research team at POSTECH has developed an inexpensive, ultra-compact wearable hologram sensor that immediately notifies the user of volatile gas detection.

Plastics could see a second life as biodegradable surfactants

2 days 11 hours ago
Scientists at the Institute for Cooperative Upcycling of Plastics (iCOUP), an Energy Frontier Research Center led by Ames Laboratory, have discovered a chemical process that provides biodegradable, valuable chemicals, which are used as surfactants and detergents in a range of applications, from discarded plastics. The process has the potential to create more sustainable and economically favorable lifecycles for plastics.

Starving tuberculosis of sugars may be a new way to fight it

2 days 14 hours ago
Tuberculosis is a devastating disease that claims over 1.5 million lives each year. The increase in TB cases that are resistant to the current antibiotics means that novel drugs to kill Mycobacterium tuberculosis (Mtb) are urgently needed. Researchers from the University of Warwick have successfully discovered how Mycobacterium tuberculosis uses an essential sugar called trehalose, which provides a platform to design new and improved TB drugs and diagnostic agents.

First 3D-printed proton-conductive membrane paves way for tailored energy storage devices

2 days 16 hours ago
The advent and increased availability of 3D printing is leading to more customizable parts at lower costs across a spectrum of applications, from wearable smart devices to autonomous vehicles. Now, a research team based at Tohoku University has 3D printed the first proton exchange membrane, a critical component of batteries, electrochemical capacitors and fuel cells. The achievement also brings the possibility of custom solid-state energy devices closer to reality, according to the researchers.

Snake species from different terrains surrender surface secrets behind slithering success

2 days 19 hours ago
Some snake species slither across the ground, while others climb trees, dive through sand or glide across water. Today, scientists report that the surface chemistry of snake scales varies among species that negotiate these different terrains. The findings could have implications for designing durable materials, as well as robots that mimic snake locomotion to cross surfaces that would otherwise be impassable.

Potential-dependent switch aids water-splitting using cobalt-oxide catalysts

3 days 13 hours ago
Using abundant cobalt and a unique experimental approach to probe ways to speed a sluggish catalytic reaction to harvest hydrogen from water, researchers from Boston College and Yale University discovered a mechanistic switch in the oxygen evolution reaction, a significant step towards optimizing electrocatalysts for water splitting to produce clean energy.

3D-printed material to replace ivory for restoration of artifacts

3 days 14 hours ago
For centuries, ivory was often used to make art objects. But to protect elephant populations, the ivory trade was banned internationally in 1989. To restore ivory parts of old art objects, one must therefore resort to substitute materials—such as bones, shells or plastic. However, there has not been a really satisfactory solution so far.

New properties of strontium titanate are significant for electronics research

3 days 14 hours ago
While studying strontium titanate with electron paramagnetic resonance, a team from KFU's Center for Quantum Technology has found that the shape of a specimen of strontium titanate influences its internal symmetry. The research was co-conducted by the Ioffe Institute of Physics and Technology (Russia) and the Institute of Physics of the Czech Academy of Sciences.

Experimental observation of the elastic range scaling in turbulent flow with polymer additives

3 days 14 hours ago
When long-chain flexible polymers are dissolved in a turbulent flow, the flow properties can be changed drastically by reducing the drag and enhancing the mixing. A fundamental riddle in materials science is to understand how these polymer additives interact with different spatial scales in turbulent flow to alter the turbulence energy transfer. In a new report now on Science Advances, Yi-Bao Zhang and a research team showed how turbulent kinetic energy could be transferred across different scales in the presence of polymer additives. The team noted the emergence of a previously unidentified scaling range known as the elastic range, where an increased amount of energy could be transferred by the elasticity of the polymers. The findings have important applications across many turbulent systems, including turbulence in plasmas or superfluids.

Picosecond electron transfer in peptides can help energy technologies

3 days 15 hours ago
Biological energy flows, such as in photosynthesis and respiration, depend on the transfer of electrons from one molecule to another. Despite its importance to sustaining life, factors governing the rate of electron transfer, especially over long distances, are not well understood because the systems that mediate such ultrafast processes are very complex. A better understanding of electron transfer rates would help scientists improve chemical transformations, energy conversion, electronic devices, and photonic technologies.
53 minutes 7 seconds ago
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