New research has found that water molecules react differently to electric fields, which could provide a new way to study spin isomers at the single-molecule level. Water molecules exist in two forms or ‘isomers,’ ortho and para, with different nuclear spin states. In ortho-water, nuclear spins are parallel to one another, and in para water, spins are antiparallel.
The combination of ab-initio numerical experiments and theory shows that optical tunneling of an electron from an atom can occur instantaneously. How long does it take an atom to absorb a photon and loose an electron? And what if not one but many photons are needed for ionization? How much time would absorption of many photons take? These questions lie at the core of attosecond spectroscopy.
An international team of scientists has created the highest static pressure ever achieved in a lab: Using a special high pressure device, the researchers investigated the behavior of the metal osmium at pressures of up to 770 Gigapascals (GPa)—more than twice the pressure in the inner core of the Earth, and about 130 Gigapascals higher than the previous world record set by members of the same team.
A team of researchers developing a bioinorganic hybrid approach to artificial photosynthesis have achieved another milestone. Having generated quite a buzz with their hybrid system of semiconducting nanowires and bacteria that used electrons to synthesize carbon dioxide into acetate, the team has now developed a hybrid system that produces renewable molecular hydrogen and uses it to synthesize carbon dioxide into methane.
A team of researchers at (Berkeley Lab developing a bioinorganic hybrid approach to artificial photosynthesis have achieved a milestone. Having generated quite a buzz with their hybrid system of semiconducting nanowires and bacteria that used electrons to synthesize carbon dioxide into acetate, the team has now developed a hybrid system that produces renewable molecular hydrogen and uses it to synthesize carbon dioxide into methane.
Tiny beads of volcanic glass found on the lunar surface during the Apollo missions are a sign that fire fountain eruptions took place on the moon’s surface. Now, scientists from Brown Univ. and the Carnegie Institution for Science have identified the volatile gas that drove those eruptions.
Bacteria are best known as free-living single cells, but in reality their lives are much more complex. To survive in harsh environments, many species of bacteria will band together and form a biofilm. A familiar biofilm is the dental plaque that forms on teeth between brushings, but biofilms can form almost anywhere given the right conditions.
Faculty at Louisiana Tech Univ. have discovered, for the first time, a new nanocomposite formed by the self-assembly of copper and a biological component that occurs under physiological conditions, which are similar to those found in the human body and could be used in targeted drug delivery for fighting diseases such as cancer.
Cancer researchers are constantly in search of more-effective and less-toxic approaches to stopping the disease, and have recently launched clinical trials testing a new class of drugs called BET inhibitors. These therapies act on a group of proteins that help regulate the expression of many genes, some of which play a role in cancer.
Invading microbial pathogens must scavenge essential nutrients from their host organism in order to survive and replicate. To defend themselves from infection, hosts attempt to block pathogens’ access to these nutrients. Now researchers at Massachusetts Institute of Technology have discovered the vital role a protein, calprotectin, plays in this process, known as “nutritional immunity."
A team of physicists at the Univ. of Toronto (U of T) have taken a step toward making the essential building block of quantum computers out of pure light. Their advance, described in a paper published in Nature Physics, has to do with a specific part of computer circuitry known as a "logic gate."
Using a succession of biological mechanisms, Sandia National Laboratories researchers have created linkages of polymer nanotubes that resemble the structure of a nerve, with many out-thrust filaments poised to gather or send electrical impulses.
In July, scientists at the Large Hadron Collider reported the discovery of the pentaquark, a long-sought particle first predicted to exist in the 1960s as a consequence of the theory of elementary particles and their interactions proposed by Murray Gell-Mann, Caltech's Robert Andrews Millikan Professor of Theoretical Physics, Emeritus.
New software developed by Rice Univ. bioengineers could speed up the diagnosis of breast cancer with 90% accuracy and without the need for a specialist, according to research published in Breast Cancer Research. Researchers said the software could improve breast cancer management, particularly in developing countries where pathologists are not routinely available.
In a computer operating system, the file system is the part that writes data to disk and tracks where the data is stored. If the computer crashes while it’s writing data, the file system’s records can become corrupt. Hours of work could be lost, or programs could stop working properly.