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Tag: "city" at biology news

City ants take the heat

...lletta of Indiana State University, has shown that city animals have been affected by urban heat islands. These researchers discovered that ants within South America's largest city—São Paulo, Brazil—could tolerate heat better than ants from outside this city. Their findings, to be published in the online ...

Rapid response was crucial to containing the 1918 flu pandemic

...nly one-eighth that of Philadelphia, the worst-hit city in the survey. In contrast to St. Louis, Philadelp... that deaths would have been 25 percent higher had city officials not implemented their interventions when they did. But had San Francisco left its controls...

Vasectomy may put men at risk for type of dementia

... people garden, build cabinets and even navigate a city subway system. By contrast, Alzheimer's patients lose interest in their hobbies, family life and may become idle. As PPA progresses over a number of years, however, patients eventually lose their ability to function independently. Preliminary evi...

Lost dogs found more often than lost cats, study suggests

... a lost cat, according to two new studies. In one city in southwestern Ohio , researchers found that 71 percent of lost dogs were found, compared to just 53 percent of lost cats. More than a third of the recovered dogs were found by a call or visit to an animal shelter. More than one in four dogs were ...

Cities change the songs of birds

...r songbirds thrive, and the specific attributes of city birds that allow them to adjust to noisy urban env...ional acoustic features that have diverged between city and forest birds. The findings also offer strong support for a theory known as the acoustic-adaptati...

'Erectile dysfunction' drugs heighten natural anti-cancer activity

...or on the paper. Nitric oxide is infamous among city dwellers as a component of air-polluting smog, but is gaining importance in medical research for its cell-signaling duties and its ability to divert soldiering T-cells that patrol and protect. The Hopkins team also analyzed gene expression pattern...

Telemedicine robots help improve health

...ly reducing the need for families to travel to the city for specialist care. Local doctors take the robot to the bedside and thanks to a video-link, established via the Centre for Online Health, the sick child can see their Brisbane specialist on the robot's television–like screen. A built-in camera a...

Male circumcision reduces HIV risk, study stopped early

...rosexual intercourse. In Kisumu, the third-largest city in Kenya, an estimated 26 percent of uncircumcised men are HIV infected by age 25. "This study will likely not have a large impact on the incidence of HIV/AIDS in the United States or Europe where heterosexual transmission of HIV is low compared w...

Study finds the air rich with bacteria

...background levels of airborne bacteria change from city to city, or are generally the same throughout a region. To explore this question, they chose Austin and San Antonio because the two cities have similar population densities, elevation and topography, and they are only about 100 kilometers apart. Afte...

China's environmental challenges

... in the issue examines the phenomenon of so-called city clusters in China, which, in contrast to the Unite...ulated with little room for natural areas. In the city of Guangzhou, for example, space between residential buildings is so tight that people refer to them...

Disappearing nest egg: Researcher studying declining numbers of macaws

...fter by the local people for its fruit ?the nearby city of Iquitos consumes up to 15 tons of the fruit per day. But the tree is also a frequent home to macaws, who nest in it and who also enjoy eating the fruit. "Unfortunately, the locals have discovered that the best way to get the fruit is to chop...

Air travel and pandemic flu

...hers looked at how the virus might spread from one city to another and how travel restrictions might reduce the rate of spread. Their calculations allowed for such factors as the time of the year, the number of air passengers who might travel between the cities, and the fact that some people are more resi...

A new tool against brain disease

...esearch Institute in Durban. Durban is the largest city in KwaZulu-Natal, and HIV prevalence among pregnant women in the city exceeds 50 percent. The studies at the lab in South Africa found that PD-1 was significantly a...

How HIV 'exhausts' killer T cells

...esearch Institute in Durban. Durban is the largest city in KwaZulu-Natal, and HIV prevalence among pregnant women in the city exceeds 50 percent. The studies at the lab in South Africa found that PD-1 was significantly a...

First surveys of Tanzanian mountains reveal 160+ animal species, including new & endemic

...range in eastern Tanzania and located north of the city of Morogoro. Its forests are often covered in a blanket of mist during the night and help collect water for two nearby rivers which in turn provide water for several settlements and a town. As a crucial source of water and home to unique and threaten...

Human behavior changes the number of strains of infectious diseases

... of the behavioral differences between village and city life: one with quiet streets and few new faces, and the other with thousands of hurrying people and crowded public transport. That's two very different environments for a pathogen. There are always going to be plenty of factors that determine which s...

Indonesia - disaster relief aid in action

.... Flattening a densely populated area south of the city of Yogyakarta, near the southern coast of Java, its path has claimed more than 3,000 people, with thousands more injured. The disaster relief team left from Brussels 19:00, Sunday 28 May, reaching Jakarta the following day. Their immediate mission i...

HIV/AIDS rates in Tijuana, Mexico increasing at alarming rate

...rectly south of San Diego California, Tijuana is a city of 1.2 million people located amidst the busiest land border crossing in the world. Data in this study suggest that Tijuana's HIV infection rate may be close to three times higher than Mexico's national average. The United Nations AIDS Program consi...

Katrina floodwaters not as toxic to humans as previously thought, study says

... a year's worth of storm water flowing through the city in only a few days," says study leader John Pardue...tions of New Orleans, primarily in the area of the city known as the "East Bank," where the main human contact with the floodwaters occurred. The samples, w...

Russian 'surrogate' alcohols are a killer

...e have been looking in detail at men in Izhevsk, a city in central Russia. While we confirmed what we already knew, that a lot of vodka is drunk in Russia, we also found that ? a surprisingly large number of people ? seven percent ? were drinking substances containing alcohol but not meant to be drunk. ...

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