Like Fish on Waves: Electrons Go Surfing
Published: September 22, 2011.
Released by Ruhr-University Bochum
Physicists at the RUB, working in collaboration with researchers from Grenoble and Tokyo, have succeeded in taking a decisive step towards the development of more powerful computers. They were able to define two little quantum dots (QDs), occupied with electrons, in a semiconductor and to select a single electron from one of them using a sound wave, and then to transport it to the neighbouring QD. A single electron "surfs" thus from one quantum dot to the next like a fish on a
Full Story »
More news from Ruhr-University Bochum
RUB Researchers Discover Protein Protecting Against Chlorine
Chlorine is a common disinfectant that is used to kill bacteria, for example in swimming pools and drinking water supplies. Our immune system also produces chlorine, which causes proteins in bacteria to lose their natural folding. These unfolded proteins then begin to clump and lose their function. RUB researchers headed by Prof Dr Lars Leichert have discovered a protein in the intestinal bacterium E. coli that protects bacteria from chlorine. In the presence of chlorine, it tightly bonds with other proteins, thus preventing
Classical Enzymatic Theory Revised by Including Water Motions
Enzymes are macromolecular biological catalysists that lead most of chemical reactions in living organisms. The main focus of enzymology lies on enzymes themselves, whereas the role of water motions in mediating the biological reaction is often left aside owing to the complex molecular behavior. The groups of Martina Havenith (Cluster of Excellence RESOLV - Ruhr explores Solvation) and Irit Sagi (Weizmann Institue of Science, Israel) revised the classical enzymatic steady state theory by including long-lasting protein-water coupled motions into models of functional catalysis.
Mental Disorders Due to Permanent Stress
The team focused mainly on a certain type of phagocytes, namely microglia. Under normal circumstances, they repair synapses between nerves cells in the brain and stimulate their growth. Once activated, however, microglia may damage nerve cells and trigger inflammation processes. The studies carried out in Bochum have shown that the more frequently microglia get triggered due to stress, the more they are inclined to remain in the destructive mode - a risk factor for mental diseases such as schizophrenia.
How Stress Aids Memory
Retrieving memory content under stress does not work very well. However, stress can be helpful when it comes to saving new information -- especially those that are emotionally relevant in stressful situations. At the Ruhr-Universitat Bochum, a team of cognitive psychologists headed by Prof Dr Oliver T. Wolf study these correlations. The RUB's science magazine RUBIN reports on the results. Faked Job Interview Triggers Stress
Susceptibility for Relapsing Major Depressive Disorder Can Be Calculated
Selver Demic and his colleagues from the Mercator Research Group have set out to find out more about the causes of depression. "Approx. 20 per cent of the population will suffer a de-pressive episode in the course of their lives," says Demic. "This cohort of 20 per cent includes people who will never again experience any problems after that one-time episode is over. The others, however, will suffer repeatedly or chronically under the disorder, despite taking appropriate medication. We want to use our
A Glimpse into the 3-D Brain: How Memories Form
The way neurons are interconnected in the brain is very complicated. This holds especially true for the cells of the hippocampus. It is one of the oldest brain regions and its form resembles a see horse (hippocampus in Latin). The hippocampus enables us to navigate space securely and to form personal memories. So far, the anatomic knowledge of the networks inside the hippocampus and its connection to the rest of the brain has left scientists guessing which information arrived where and when.
Low-birth-weight Children Are Particularly Vulnerable to Environmental Influences
Low birth weight children are more vulnerable to environmental influences than infants born with normal weight. When brought up with a great deal of sensitivity, they will be able to catch up in school, but on average they will not become better students than normal birth weight children. This result, provided by an international psychologist team, has confirmed the so-called diathesis-stress model of development for low birth weight populations. The researchers report their findings in the Journal of Child Psychology and Psychiatry.
Green Light for Clever Algae
The researchers headed by Prof Dr Nicole Frankenberg-Dinkel have been the first ones to reveal similarities and differences in the assembly of the light-harvesting machinery of the cryptophyte Guillardia theta compared to cyanobacteria and red algae. The publication of their results in the current issue of "The Journal of Biological Chemistry" is among the two per cent of the publications that were selected as "Paper of the week". Cryptophytes: Matryoshka dolls of the waters
Germanium Comes Home to Purdue for Semiconductor Milestone
|Researchers Demonstrate Record-setting P-type Transistor|
CAMBRIDGE, MA -- Almost all computer chips use two types of transistors: one called p-type, for positive, and one called n-type, for negative. Improving the performance of the chip
|Germanium Made Laser Compatible|
Researchers from ETH Zurich, the Paul Scherrer Institute (PSI) and the Politec-nico di Milano have jointly developed a manufacturing technique to render the semiconductor germanium laser-compatible through high tensile
For Electronics Beyond Silicon, a New Contender Emerges
|Synaptic Transistor Learns While It Computes|
Cambridge, Mass. – November 1, 2013 – It doesn't take a Watson to realize that even the world's best supercomputers are staggeringly inefficient and energy-intensive machines.
Single-atom Transistor Is 'Perfect'
|The First Molybdenite Microchip: Surpassing the Physical Limits of Silicon|
After having revealed the electronic advantages of molybdenite, EPFL researchers have now taken the next definitive step. The Laboratory of Nanoscale Electronics and Structures (LANES) has made a chip,
Proton-based Transistor Could Let Machines Communicate with Living Things
|More » |