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Tag: "throughout" at biology news

Scientists find fossil proof of Egypt's ancient climate

...e present are known to have occurred in the Sahara throughout the last million years, but their duration, intens...ght, which would have allowed for greater mobility throughout the region." The researchers noted that the silt thickness at the lake exceeds five yards, an indic...

Sexual cooperation: Mating increases longevity in ant queens

...undergo repeated phases of mating and reproduction throughout their lifetime, ant queens in social species mate only during a short period early in life and store and use the sperm of their mate for the rest of their lives. Sexual offspring are only produced after several months or years of colony growth, durin...

Artifical cornea lets woman blind 20 years see

...rogressive growth of blood vessels and scar tissue throughout an implanted natural cornea, according to researchers. The new cornea eventually becomes as opaque as the original. "The cornea is usually just like a clear window in the eye for people to see through, but sometimes the cornea becomes opacified and ...

Norovirus, AIDS vaccine and Hepatitis Virus

...he AIDS pandemic is a top priority for researchers throughout the world. Extensive testing has been conducted with live vaccines to determine if immunization would be effective at prevention, but they are not suitable for human use due to the potential that the vaccine viruses could mutate and reacquire the abi...

Reducing malarial transmission in Africa

...apest and most widely used antimalarial, is common throughout Africa, and resistance to sulfadoxine-pyrimethamine (SP), the first-developed and least expensive alternative to CQ, is also increasing. These trends have forced many countries to change their treatment policies and use more expensive drugs, includin...

New component of the 'brakes' on nerve regeneration found

...eir experiments revealed that TAJ/TROY is produced throughout the adult brains of mice. Also, they found that TAJ/TROY readily fits into the inhibitory receptor complex and that the resulting receptor complex switches-on the inhibitory machinery within neurons. Also, they found that treating neurons with a nonf...

Computational Method Speeds Mapping of Cell Signaling Networks

...nters a foreign invader, it relays a danger signal throughout the cell, activating it for a quick response. These signals prompt activated T-cells to multiply rapidly and send out molecular "distress signals" that attract other immune system molecules to battle the infection. Components in the pathway are chemi...

Survey finds silver contamination in North Pacific waters

...ic survey completes a preliminary survey of silver throughout the world's oceans. The goal was to establish current levels of contamination as a baseline for future studies, Flegal said. "We found by far the highest levels of silver in the North Pacific. Even though the Atlantic Ocean is subject to industrial ...

Protein That Promotes Survival Of Stem Cells Might Be Key To Poor Leukemia Prognosis

... Mc1-1 is also crucial for maintaining blood cells throughout life as red and white cells and platelets die and must be replaced. HSCs are also needed to rebuild the blood system of patients undergoing chemotherapy and radiation for cancer. Opferman completed work on this project while a member of Stanley Korsm...

Genetic defects give the immune system the green light to attack the pancreas

...t unchecked, the self-destructive T-cells can roam throughout the body and wreak havoc. This is the process behind many autoimmune, or “self-immune,?diseases such as type 1 diabetes, multiple sclerosis, rheumatoid arthritis and others. To understand what happens in type 1 diabetes, the researchers combined a u...

Leprosy microbes lead scientists to immune discovery

...ed the immune defenses and can spread along nerves throughout the body and may cause blindness. The scientists found DC-SIGN+ macrophages in both types of leprosy infections. The CD1b+ cells were present only in the milder form, indicating a successful battle against the leprosy bacterium. They were missing, h...

Shift of weather patterns necessitates rethinking of reforestation methods

...is planting strategy. Relatively cool, wet weather throughout mid-summer gave the new seedlings time to recover from root damage. But weather patterns have changed, Taylor said. "Using a Texas Forest Service analysis of 100 years of weather data, we see a cyclical pattern of 25 years of summers that are eithe...

Aggressive aquatic species invading Great Lakes

...at round goby abundance has increased dramatically throughout the Great Lakes basin since its arrival from the Black and Caspian Seas in 1990. Previous research has shown that round gobies eat eggs and young of various native species. Scientists believe that gobies have contributed to or caused the extinction o...

NIH Researchers Discover How Insulin Allows Entry of Glucose Into Cells

...overed that, although a few vesicles are scattered throughout the cell, the majority circulate just under the cell’s surface. The vesicles travel along a railroad track-like network of molecules known as microtubules. When insulin binds to the cell’s outer surface, those vesicles immediately stop moving, tether...

First technology to remove prions that cause vCJD from blood launched

...s to meet the specific requirements of each nation throughout Europe, followed by Canada and the US. The Company is also developing an ante mortem test to detect infectious prions in cattle prior to entering the food supply. ...

Undesirable expatriates: Preventing the spread of invasive animals

...ican introductions to Europe have been on the rise throughout the 20th century as more Americans immigrate to European countries. In many parts of Europe, regulations on imported wildlife are not as strict as the U.S. and Canada. Canadian goose, gray squirrel, and northern cottontails already populate the Europ...

Plant Sacrifices Cells to Fight Invaders

...the extent of PCD, leading to excessive cell death throughout the plant. When a plant pathogen makes contact with its intended target, the plant cells immediately launch a set of sophisticated molecular responses. Such defense mechanisms, including PCD, are similar to immune responses exhibited by animal cells...

Genetic therapy reverses nervous system damage in animal model of inherited human disease

...fe said. "In this case we see that storage lesions throughout the brain had been greatly reduced, even though gene transfer was limited to areas surrounding where injections had been made." The large animal study also demonstrated that only a limited number of injections are necessary to introduce the working ...

One gene links newborn neurons with those that die in diseases such as Alzheimer's

...boratory. The gene is known to be highly expressed throughout the brain, and in fact, the UCHL1 protein is thought to make up as much as 2 percent of total soluble brain protein. But in the zebra finch brains, nonreplaceable neurons produced, on average, about two and a half times the amount of UCHL1 as replace...

Measles Deaths Worldwide Drop By Nearly 40% Over Five Years

... From 1999 to 2003, more than 350 million children throughout the world were vaccinated against measles through SIAs. As measles wards shut down all over the African continent, a long-term budget item in many hospitals can be freed up to save children from other diseases. “We now have the opportunity to repli...

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