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Tag: "account" at biology news

Study provides first look at the 'birth' of a retina cell

... Rods, along with cones, are photoreceptors, which account for 70 percent to 80 percent of all cells in the adult retina. Rods greatly outnumber cones in the mouse and in humans. Damage to photoreceptors is at the root of eye diseases such as diabetic retinopathy, retinitis pigmentosa, and macular degenera...

Patients to benefit from novel technology revolutionizing high-speed molecular imaging

...en the way to personalized diagnostics taking into account patient-specific physical information," noted Patt...diation dose, and personalized scanning takes into account unique patient physiology and anatomy, he added. "Simultaneous imaging of a combination of radiophar...

Variations in detoxifying genes linked to Lou Gehrig's disease

... determined that mutations in a gene known as SOD1 account for 20 percent of familial, or inherited, ALS (2 percent of all cases of ALS). However, the cause of sporadic ALS is still unknown. In earlier research Siddique and other researchers hypothesized that sporadic ALS is modulated by variations in mult...

UCLA study finds same genes act differently in males and females

... make up the human genome, the X and Y chromosomes account for less than 2 percent of the body's genes. But when we looked at the gene expression in these four tissues, more than half of the genes differed significantly between the sexes. The differences were not related to reproductive systems ?they were ...

Jellyfish dominate fish in over-harvested Namibian waters

... researchers' findings indicate that jellyfish now account for significantly more biomass in the northern Benguela waters than do fish. Based on the data they obtained--by using scientific echosounders and trawl nets to sample jellyfish and fish in an area of over 30,000 nautical miles--the researchers estim...

Hopkins scientists show hallucinogen in mushrooms creates universal 'mystical' experience

... in the brain and in what manner are unknown. An account of the study, accompanied by an editorial and four experts' commentaries, appears online today in the journal Psychopharmacology. Cited as "landmark" in the commentary by former National Institute on Drug Abuse (NIDA) director, Charles Schuster, ...

Polynesia explorers created worldwide web of scientific knowledge

...ustoms of strange peoples that could turn a travel account into a bestseller," the travelers steered their courses using Linnaeus as their botanical guide and Jean-Jacques Rousseau as their intellectual guide. The first wave of travelers expected to find the same "natural" societies in Polynesia that had be...

UGA researchers find that hunting can increase the severity of wildlife disease epidemics

...isy and Rohani said, is that they didn't take into account an ecological principle known as compensation. When a portion of the animal population is reduced, those that survive are left with more resources such as food and shelter. As a result of the newly plentiful resources, the death rate decreases and th...

Wild vs. lab rodent comparison supports hygiene hypothesis

... of this model, Parker said, is that it takes into account the totality of the animals living in their natural environment. Specifically, the team focused the animals' production of various antibodies, known as immunoglobulins, either associated with autoimmune disease or associated with allergy. When an an...

Study identifies new role for breast cancer susceptibility gene

...ons in the breast cancer susceptibility gene BRCA1 account for up to 50% of hereditary breast cancers. BRCA1 is known to serve as a tumor suppressor by regulating DNA damage repair and maintaining genomic stability. Although the mechanism is not fully understood, reduced BRCA1 expression is also often correl...

Tropical forest CO2 emissions tied to nutrient increases

...ent of the carbon stored on Earth's continents and account for at least one-third of the annual exchange of CO2 between the biosphere and the atmosphere, said Cleveland. Earth's soils are believed to store several times more carbon than all of the planet's vegetation. "This is the first time anyone has take...

Tiny airborne particles are a major cause of climate change

...e change from a different perspective, taking into account not only the global impact of aerosols and greenhouse gases, but local effects too." ...

Can biological traits predict diversification rates in birds?

...identifies the two biological traits in birds that account for most of the variation: dispersal and feeding generalization. "Few studies have looked at ecological traits such as dispersal and feeding generalization as explanations for variation in rate of diversification, perhaps because these traits are ch...

New approach to vaccine development provides potent, long-lasting immunity

...se simple movements. For example, by taking into account the number of repetitions it took for the subjects to push the joystick in the first direction to keep it centered and how long it took for the subjects to "forget" how hard to push the joystick, the predictions suggest that the brain learns muscle c...

Robotic joystick reveals how brain controls movement

...se simple movements. For example, by taking into account the number of repetitions it took for the subjects to push the joystick in the first direction to keep it centered and how long it took for the subjects to "forget" how hard to push the joystick, the predictions suggest that the brain learns muscle c...

Atmospheric ozone recovering in mid-latitudes, report shows

...anges to the Montreal Protocol, researchers had to account for long- and short-term natural fluctuations in ozone concentration, Cunnold noted. One such fluctuation is an 11-year solar cycle, and another is a two-year oscillation that occurs in the tropics, but affects ozone in other latitudes because of atm...

UGA study explains peaks and troughs of dengue epidemics

... highlights the key elements you need to take into account while developing a forecasting model," Wearing said. "Because if you were to build a forecasting model without understanding the trends in cross-immunity, you would not necessarily predict what we observe." The researchers examined 30 years of data...

First human trial of antibacterial contact lens

...Centers for Disease Control estimate that biofilms account for at least two-thirds of all chronic bacterial infections. Biosignal and the Institute for Eye Research have tested antibiofilm compounds and generated proof of concept data in a broad range of product categories in the medical, industrial and c...

The critical importance of mangroves to ocean life

...ss than 0.1 percent of the global land surface yet account for a tenth of the dissolved organic carbon (DOC) that flows from land to the ocean. Dittmar and his colleagues at several German research institutions analyzed the carbon output from a large mangrove forest in Brazil and suggest that the plants are ...

Is the brain wired for faces?

...veloped for face recognition, could quantitatively account for the inversion effect and make predictions about how selective the group of "face neurons" should be to explain human performance, which provided further evidence that it was unnecessary to postulate any kind of special processing in the brain for...

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