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HIV-1 spread through six transmission lines in the UK

...hains of transmission, introduced in the early and mid 1980s. This goes against the prevailing belief that one initial entry of HIV-1 was responsible for the spread of the epidemic. “Since 1990 there have been important changes in Britain's social attitudes and awareness of HIV-1 and AIDS. Despite a ver...

Road salt affects mitigation wetlands

...ear all the wetlands went back to zero salinity in mid spring," says Silver. "We are not sure if this wil...if the salt levels will again fall back to zero in mid spring this year as Erie had its last snowfall on May 2 and had a three-foot snowfall in late April....

Rodent social behavior encoded in junk DNA

...gun at the NIMH Intramural Research Program in the mid l980s by now NIMH director Thomas Insel, M.D. By l993, his team had discovered that the distribution of brain receptors that bind to the hormone vasopressin differed dramatically between monogamous and polygamous vole species and accounted for their ...

Tropical Deforestation affects rainfall in the U.S. and around the globe

... it also has a strong influence on rainfall in the mid and even high latitudes," said Roni Avissar, lead author of the study, published in the April 2005 issue of the Journal of Hydrometeorology. Specifically, deforestation of Amazonia was found to severely reduce rainfall in the Gulf of Mexico, Texas, ...

Bacteria in Household Dust May Trigger Asthma Symptoms

...risk even in non-allergic individuals." Since the mid 1960s, researchers knew that house dust contains endotoxin, but it is only within the last five years that they began to understand the impact of household endotoxin on human health. Knowing what triggers asthma, whether it is endotoxins or something...

Restaurant seafood prices since 1850s help plot marine harvests through history

...ish had stable inflation-adjusted prices until the mid 1950's, after which they rose rapidly. Prices rose three times faster than inflation until the late 1970's, after which they appear to have slightly fallen. 5) Inflation-adjusted prices of raw oysters. Raw oysters have been popular on restaurant men...

UGA study explains peaks and troughs of dengue epidemics

...ing of epidemics. "We found that since about the mid 1980s, there's been a sequential replacement of the dominant serotype," said lead author Helen Wearing, a post-doctoral researcher at the UGA Institute of Ecology. "So, for example, one year serotype three is 60 percent of the cases and the next year...

New findings offer more complete view of breast cancer gene mutations in US population

...5 to 27 percent of all breast cancer cases. In the mid 1990s, researchers found that mutations in the BRCA1 and BRCA2 genes are a major cause of the hereditary form of the disease. Women inheriting these mutations have a 40 to 85 percent lifetime risk of developing breast cancer, as well as an increased ...

Light guides flight of migratory birds

...vation Phillips had published 20 years ago. In the mid 1980s, he was doing research to determine how homing pigeons navigated. There was a theory that wind-borne odors provide pigeons with information about the locations of odor sources, which could then be used to determine their position relative to th...

Species unique to tidal marshes face threats

...ird Center and colleagues. Tidal marshes occur in mid to high latitudes, along coasts that are protected within estuaries or behind barrier islands. They are most common in North America and China. Some tidal marsh species are protected from high salinity by relatively impermeable skin, and others have ...

Investment level in HIV prevention programs related to HIV incidence in the United States

...ment in prevention programs. Things changed in the mid 1980s when investment levels began to predict incidence. That is, as the nation continued to increase the funding of HIV prevention programs, HIV dropped substantially from 160,000 infections per year to about 40,000 infections per year. In the early...

CSIRO imagery shows Outer Great Barrier Reef at risk from river plumes

...delling, which says sediment plume movement in the mid to northern GBR usually go north and never directly flow to the outer reef is spared the direct effects of such river floods. "A re-think is needed now that we know where flood plumes go," says CSIRO scientist Arnold Dekker, "and what this mean...

Tundra disappearing at rapid rate

...ge in response to climate warming during the early mid 20th century was observed at all locations. Treeline advanced considerably—as much as 85 metres elevation—on warm, south-facing slopes and tree density increased significantly—as much as 65 per cent—on cooler, north-facing slopes. "The mechanism ...

Tibetan antelope slowly recovering, WCS says

...d widespread poaching in this remote area. In the mid 1990s, Schaller estimated that perhaps 75,000 chiru remained in the wild, with as many as 20,000 falling to poachers annually. However, no comprehensive census of chiru has ever taken place due to a sprawling range that spans more than 250,000 squar...

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