Tag: "pass" at biology news
First impressions: Computer model behaves like humans on visual categorization task
...ion processing that occurs during one feed-forward pass
through the visual cortex is sufficient for robust object recognition. The model is thus an appropriate vehicle for testing the behavioral study's no-feedback-necessary theory, while the animal/no animal behavioral test makes a good reality check ...
Discovery of 'master switch' for the communication process between chloroplast and nuclei of plants
...have puzzled for years in understanding how plants pass
signals of stress due to lack of water or salinity from chloroplast to nucleus. They know that chloroplasts the cellular organelles that give plants their green color have at least three different signals that can indicate a plant is under stress. ...
Researcher examines polymers created with poultry feathers
...waste, such as poultry feathers or eggs that don't pass
inspection. These agricultural wastes currently find uses in low-value animal feed or are simply disposed. Both come at a cost to the poultry industry that is passed onto consumers. The challenge in developing biodegradable plastics is creating a ...
One membrane, many frequencies
...se mechanical vibrations to electrical signals and pass
them on to the brain via the auditory nerve). If certain genes for this membrane are missing or damaged, total deafness ensues. Rousso and research student Rachel Gueta, together with researchers at the Ben-Gurion University of the Negev, wanted to...
Removing a hydrogen fuel-cell roadblock
...s current and the positively charged hydrogen ions pass
through the membrane where they readily combine wi...and readily available, it has to allow hydrogen to pass
through it and be ductile enough to be drawn into long, thin tubes. It also has to resist oxidation,...
Researchers find best way to detect airborne pathogens
...lting color, which scientists see as the organisms pass
through this light, tells them whether the cells are live (viable) or dead. Just because we can't grow something in medium in the lab doesn't mean it won't grow in a human, Buckley said. Flow cytometry also tells researchers how many total cells ...
Pioneering research into health benefits of beauty treatment
...ient retaining control. Symptoms include having to pass
water very often day and night, not being able to put off the need to do so, sudden urgency to pass
water and sometimes incontinence. The botulinum toxin relaxes the bladder muscle so it cannot squeez...
2-step process filters evolution of genes of human and chimpanzee
...n can take its place in the human genome it has to pass
through a rigorous two-stepnegative and positivescreening process, say the study authors, evolutionary geneticists from the University of Chicago, the University of Tokyo and the University of Washington. Both steps focus on the most radical changes...
Joslin researchers discover a surprising culprit in the search for causes of diabetic birth defects
...way into a room that will only allow one person to pass
at a time, whereas a high Km transporter is like a wide-open door that will allow several people to pass
at a time, explained Dr. Loeken. When very few people need to get through the doors at a time, the n...
Carnegie Mellon researchers urge regulators to rethink strategies for soot emission
...plets in clouds and affect how much sun is able to pass
through the cloud to earth, as well as the amount of moisture that is returned to earth. Both clouds and sunlight play key roles in climate change. The effects of particulate matter were identified as key to uncertainty in a recent report by the Inte...
Brain works more chaotically than previously thought
...ns of little "arms", known as dendrites. Dendrites pass
on the electrical impulses to the cell body, or so...ons of the cell along which the electrical signals pass
until they meet, at a synapse, the dendritic arm of another neuron. The synapse presents an insurmou...
ACS News Service Weekly PressPac -- Feb. 21, 2007
...s are rich in soluble dietary fiber (SDF) that can pass
into brewed coffee, the researchers added, noting, however, that little research has been done on the topic. In the new study, researchers used a special technique for measuring dietary fiber in beverages to show that brewed coffee contains a signi...
E. coli bacteria migrating between humans, chimps in Ugandan park
... and other non-human primates. Human diseases also pass
to monkeys and apes, with equally dire consequences: Pneumonia, respiratory disease, scabies and a polio-like virus have caused epidemic mortality in chimpanzees in some African locales....
The insides of clouds may be the key to climate change
...ge cloud thickness, affect how much sun is able to pass
through the cloud to Earth, as well as the amount ...am," Penner said. "More sunlight and moisture will pass
through a cloud of cotton as opposed to the denser cloud of Styrofoam. This difference is becoming m...
Super-thin membrane, 50 atoms thick, sorts individual molecules
...erial, they require much more time for proteins to pass
through, and they are prone to clogging. Recently, researchers had tried to design an ideal filter by drilling holes into a thin slice of another silicon-based material with an ion beam. While the effort did result in a filter with regular holes, t...
Global study concludes 'attack rate' of flu in kids is 55 percent lower with nasal spray vaccine
...hildren, when they bring the illness home, tend to pass
it on to adults in their household." The attack rate is the number of people who get sick as measured against the total number of people in a particular study population. Belshe said the study points to new thinking about how to best protect very...
Out of Africa -- bacteria, as well
...out the world, human populations had to repeatedly pass
through what scientists call genetic bottlenecks: ... Since the Homo sapiens populations usually had to pass
through several genetic bottlenecks on their way across the globe, their genetic diversity declined ...
Scientists use nanoparticle to discover disease-causing proteins
...his research team used dendrimers because they can pass
through cell walls efficiently with little disturbance to the cells and then label specific proteins with isotopic tags while cells are still alive. This allows the scientists to determine the activities of proteins that play roles in specific diseas...
Detection of Salmonella in 24 hours
The food and drink we consume have to pass
strict quality controls. Nevertheless, these measures are not always sufficient, given that sometimes certain foodstuffs can still give rise to food poisoning, most often caused by micro-organisms. The Salmonella bacterium is undoubtedly one of the b...
Parents' genes, not parents' arguing, may cause children's conduct problems
... blame but rather that parents who argue a lot may pass
on genes for disruptive behavior to their children. The findings are published in the January/February 2007 issue of the journal Child Development. A group of researchers from the University of Virginia and several other universities looked at this...
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