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Tag: "varies" at biology news

Mutation in clams protects against paralytic shellfish poisoning but raises human health risk

... 1960s and 1970s showing that PSP toxin resistance varies among shellfish species. In laboratory studies, the investigators exposed clams to PSP toxins and monitored the shellfish for mortality and potentially harmful changes in burrowing behavior. They found that clams that came from areas with a history ...

Finding hidden invaders in a Hawaiian rain forest

...hat had not been detected before AND showed how it varies across the landscape." "These findings are valuable to resource managers on two levels," remarked Tim Tunison, Chief of Resource Management of the Hawaii Volcanoes National Park. "We need to understand the ecological effects of invasions over the la...

Stanford gut check shows diversity of intestinal ecosystem

...gure out who is there and how the community census varies in time and space," said Eckburg, the lead author of the study published in this week's online edition of Science Express. "But even with this large sequencing project, which produced orders of magnitude more sequence data than had been generated in ...

Canada approves marijuana-based pain spray

...ordon. “This is very important since pain severity varies between different patients and even in the same patient at different times.?/p> Sativex and side-effects In clinical trials, the most frequent side-effects included nausea, fatigue, dizziness and application site reactions. Side-effects were usua...

Sickle cell and protection against malaria

...ether the protection provided by HbAS is innate or varies with age, the authors studied age-specific malaria in a sample of children and adults in the Kilifi District of coastal Kenya. Protection against mild malaria increased up to 60% at age 10, decreasing to 30% in older children. Research into malaria ...

Polymers with copper show promise for implanted sensors

...oxide are present in blood, and whether the amount varies from one person to another. "The device might work with me, but if you don't have enough of the reactive species in your blood, then it may not generate adequate nitric oxide levels and it may not prevent clotting," said Meyerhoff. To get at these qu...

Drug-resistant bacteria on poultry products differ by brand

..., pathogenic bacteria on uncooked poultry products varies by commercial brand and is likely related to antibiotic use in production, according to researchers at the Johns Hopkins Bloomberg School of Public Health. Their study is the first to directly compare bacterial contamination of poultry products sold ...

Highly adaptable genome in gut bacterium key to intestinal health

...rial capacity for processing dietary carbohydrates varies among individuals and what influence that may have on weight. ...

Purdue proves concept of using nano-materials for drug discovery

...0 nanometers, and the total volume of the reactors varies from 1-10 nanoliters. "What's unique about this device is that the surface has nanometer-scale pores in it," Lee said. "The concept is fairly simple - there is an inorganic porous membrane - in this case alumina, which separates the reaction chamber...

Scientists ID molecular 'switch' in liver that triggers harmful effects of saturated and trans fats

...d adjust their activity, like a dimmer switch that varies the brightness of a light. Co-activators join with other regulatory proteins called transcription factors in controlling the expression of genes. Spiegelman and Jiandie Lin, PhD, the paper's lead author and a researcher at Dana-Farber, have previousl...

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