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Tag: "population" at biology news

Most common lung cancers may begin in newly discovered cells

... stem cells is the biggest part of the story. This population could be very useful for more than cancer." In th... cystic fibrosis. "This work has identified a new population of cells that links the normal biology of the lung to lung cancer development," said Bender Kim. "We...

Say what? Bacterial conversation stoppers

...g themselves to count their numbers and to get the population to act in unison. A synchronized group of bacteria can mimic the power of a multi-cellular organism, ready to face challenges too daunting for an individual microbe going it alone. Swelling populations trigger their quorum-sensing apparatuses, which ...

Stem Cells Found In Cerebellum; Possible Cell of Origin for Childhood Brain Tumors

...r examination, these turned out to include a small population of neural stem cells, said Audra Lee, a research associate in Wechsler-Reya's lab who carried out the majority of the work. The stem cells they isolated represented less than one percent of the total number of cells in the cerebellum, said Lee. Yet ...

Gene therapy to lower blood pressure just enough

... for individuals and for the health of the world's population as well." The gene in question -- atrial natriuretic peptide or ANP -- promises to control blood pressure through a variety of effects on key areas involved in the problem of hypertension, including the relaxation of smooth muscle cells in blood ve...

Survival of heart patients on beta-blockers varies greatly with genetic variation

...on at all other points. Thirty-nine percent of the population possess a set of beta-2 genes with a C base at position 79, and 16 percent possess at set of beta-2 genes with an A base at position 46. In this study, ACS patients on beta-blockers with either of these two specific genetic variations constituted t...

Crisis in African fish supplies looms, experts warn Africa leaders

...tion of natural fish stocks is leveling off as the population steadily grows. African countries face a major ch...on the continent, where more than one-third of the population is undernourished. While sub-Saharan Africa has the world's lowest per capita fish consumption, mor...

Leptin-signaling Protein Maintains Normal Body Weight And Energy Balance In Mice

...tion of natural fish stocks is leveling off as the population steadily grows. African countries face a major ch...on the continent, where more than one-third of the population is undernourished. While sub-Saharan Africa has the world's lowest per capita fish consumption, mor...

Seaweed could make junk food healthier

... is probably the best vehicle to reach the general population because most people eat it. Adding the seaweed extract could quadruple the amount of fibre in white bread." ...

South Africa still debating how to tackle HIV/AIDS when 5 million are infected

...re infected with HIV - a similar rate to the adult population at large. The army is taking part in a US-funded programme to see how AIDS is affecting its combat-readiness, and this includes giving anti-retroviral drugs (ARVs) to some 1,000 soldiers. ...

AIDS expert says global strategy needed to combat feminization of HIV/AIDS

...be infected than men. Women make up half the adult population living with the virus in the Caribbean and one-third of those in Latin America. The reasons for the rise in female cases differ among countries, with 97 percent of female HIV infections in the United States due to heterosexual transmission (81 perce...

Primate virus jumps species barrier to humans for first time in Asia

...ther primate species have already seen significant population losses because of infection by human illnesses. ...

A vaccine to kill tapeworm

...ople with existing drugs to remove tapeworm from a population and preventing the reinfection of the human population by vaccinating pigs," he says. ...

Squeezing out dune plants

...trapped plants in a small zone, altering the plant population as well as the dune structure. Larger, sturdier plants ?late-succession species ?are the most important to preserve, yet these are the most likely species to be lost. These plants are critical in the formation of dunes, binding sediments, and reduci...

Deep sea buffet for bone-devouring worms

...ments. Dr Goffredi says: "Measures of significant population sizes, and the discovery of four additional host species in only three years, suggests that the Osedax worms and their bacterial 'partners' are likely to play substantial roles in the cycling of nutrients into the surrounding deep-sea community." Th...

Helping in a selfish world

...p. Based in Hamilton, the University has a student population of more than 23,000 and more than 112,000 alumni in 128 countries. ...

Visceral Leishmaniasis: Successful Vaccine Trial In Dogs

...given. In the most heavily affected areas, the dog population is hit heavily by infection. It acts as parasite r...accine would help reduce the portion of the animal population infected. The risks of transmission of the disease to humans would in this way be indirectly reduced...

UCR biochemist goes to Washington with high-protein corn

...pose a useful approach to feed the world's growing population Corn with twice its usual content of protein and oil and about half of its usual carbohydrate content is what Daniel Gallie, professor of biochemistry at UC Riverside, will present at a congressional seminar in Washington, D.C., this week. Because ...

Scientists discover gene that controls speed of tuberculosis development

...ning the disease. "About one-third of the world's population is infected by Mycobacterium tuberculosis--the bacteria responsible for tuberculosis," says Dr. Erwin Schurr, a molecular geneticist at the Centre for the Study of Host Resistance at the MUHC, and the study's principal investigator. "Of the estimated...

Traditional models underestimate extinction rates

...early unabated, the need to accurately predict the population dynamics and extinction risk of potentially endang...ndard models for predicting extinction assume that population growth and decline are governed by random, or stochastic, variables. But few scientists have actuall...

Public release of pig genomic sequences

... global exporters of pig products. Denmark, with a population of only 5.4 million people, produces app. 25 million pigs per year. BGI is a leading genomics research institution in the promotion of genomics in agricultural research. In the past 5 years, in addition to its contribution to the international Human...

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