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Tag: "needed" at biology news

Flocking together: Study shows how animal groups find their way

... 10 to 200, the percentage of informed individuals needed to accurately guide the group reduced from approxi...ead a small group was about the same as the number needed to lead a large one, Couzin said The researchers extended their experiments by introducing two subg...

Alaskan puzzles, monitoring provide insight about North Pacific salmon runs

...tat -- parts of streams or entire watersheds -- is needed to sustain salmon. Puzzles include Alaska's Kvichak River, the world's most important salmon-producing river. It has had runs of more than 50 million sockeye salmon in the past, which is more valuable than all the salmon in the lower 48 combined bac...

A human parasite with a streamlined mitochondrion

...ed versions. In humans, these diverse carriers are needed to import and export the varied chemicals required, or produced, by our complex mitochondria. The presence of a single carrier in the Entamoeba mitosome means that it must be able to do far fewer jobs than our own mitochondria. Further experiments pe...

Researchers identify protein crucial for survival of Lyme-disease bacterium

...the manner that they should to sustain the numbers needed to move from the midgut to the salivary glands. We don't understand the mechanism for that yet, and that will be the next step in our research." Further study of the function of the BptA protein could give researchers additional clues as to how the ...

FDA Clears the Way for Generic Versions of Transdermal Patches to Treat Chronic Pain

...ioid combinations, non-steroidal analgesics, or as needed dosing with short-acting opioids. Fentanyl is currently a Schedule II controlled substance, which is the highest level of control for drugs with a recognized medical use. As a controlled substance in Schedule II of the Controlled Substances Act (CSA...

Scientists Propose Sweeping Changes to Naming of Bird Neurosystems to Acknowledge Their True Brainpower

...ioid combinations, non-steroidal analgesics, or as needed dosing with short-acting opioids. Fentanyl is currently a Schedule II controlled substance, which is the highest level of control for drugs with a recognized medical use. As a controlled substance in Schedule II of the Controlled Substances Act (CSA...

Marburg haemorrhagic fever in Angola update

...blic health interventions. In theory, the measures needed to end the Angolan outbreak are few in number and straightforward in nature. Rapid detection and isolation of patients, tracing and management of their close contacts, infection control in hospitals and protective clothing for staff work to interrupt...

Microbial fuel cell: High yield hydrogen source and wastewater cleaner

...bout 0.25 volts or a small fraction of the voltage needed to run a typical 6 volt cell phone -- they can lea... feedstock. It uses about one-tenth of the voltage needed for electrolysis, the process that uses electricity to break water down into hydrogen and oxygen. L...

Strongest proof yet found for prion hypothesis

...e infectious prions in test tubes, because what is needed to prove the prion hypothesis completely is to be able to produce this process in vitro in the absence of living cells and thus rule out the presence of a virus," said Claudio Soto, professor of neurology at UTMB and senior author of the paper. "The ...

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

... platelets die and must be replaced. HSCs are also needed to rebuild the blood system of patients undergoing...alive and multiplying so the body can maintain its needed supply of blood cells," he said. "However, Mcl-1 also prevents the abnormal white blood cells found ...

Youth With HIV Take More Risks After New Meds Introduced

...aviors and aim to improve quality of life are more needed now than ever before," the researchers write. Although HAART use has significantly improved the care of HIV patients, the longer lives of those patients could mean more opportunities to transmit the virus to others, says Lightfoot. "Simultaneously,...

Cooperation is key—a new way of looking at MicroRNA and how it controls gene expression

...many of our genes encode proteins that may only be needed occasionally. Indeed, having some of these proteins around when they are not needed can create any number of problems for an organism, and failing to properly control gene expression c...

FDA Works To Speed The Advent Of New, More Effective Personalized Medicines

...ed. The final guidance describes what data will be needed during the marketing application review process, the format for submissions, and the data that will be used during regulatory decision making. The guidance also explains a new mechanism for industry to voluntarily submit research data to further the ...

Protein helps regulate the genes of embryonic stem cells

...mbryonic stem cells. The protein, called "eed," is needed for an essential chemical modification of many genes. Embryos cannot survive without the modification. The findings appear in the May 24 issue of the journal Current Biology. The research offers an important contribution to a new wave of thinking in...

Double triumph in stem cell quest

...volunteers, meaning an average of only 17 eggs was needed per ESC line (Science, DOI: 10.1126/science.111228...k. Obtaining the large numbers of fresh human eggs needed for therapeutic cloning is not possible for legal reasons in many countries and is very expensive in...

NYU and MSKCC research provides model for understanding chemically induced cancer initiation

...r level," added NYU's Broyde. "Such information is needed for devising novel preventive and therapeutic strategies for addressing the problem of cancer induction by environmental chemical carcinogens." The researchers added that the finding opens new horizons, at the molecular level, for understanding the ...

Scientists discover that three overlapping signals in embryo help get the backbone right

... are so critical that many overlapping signals are needed to ensure that cells go down the right path. The formation of the back and belly is a milestone for frogs as well as for humans and other vertebrates, occurring as it does at the beginning of the process of gastrulation, which sees front and back, he...

Friendly bacteria in humans may protect against HIV

...preferences," says Tao. "To block HIV, however, we needed to find bacteria that prefer the unusual sugar mannose and thus can capture it." To identify bacteria that target mannose, Tao and his colleagues isolated oral and vaginal lactobacilli from healthy humans and tested the ability of different strains ...

Compounds in plastic packaging act as environmental estrogens altering breast genes

...ess effect later," Moral said. Future studies are needed to determine whether exposure to such xenoestrogens leads to breast cancer in rats and whether these estrogens bring about similar gene alterations in human breast tissue. ...

Putting ecology back into river restoration

...g ecological success in restoration. Standards are needed because progress in the science and practice of river restoration has been hampered by the lack of agreed upon criteria for judging ecological success." The debate is timely given the many waterfront regeneration projects under way worldwide. But, P...

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