Tag: "levels" at biology news

New online portal merges vast data on Gulf of Maine ecosystem

...of Maine Ocean Observing System and others) to new levels of dynamic data sharing and data aggregation and mapping. ...

Dead zone area in Gulf could be increasing, researchers say

...s show that the area's water contains lower oxygen levels than expected this time of year. That could mean ..." DiMarco explains. "That means the stratification levels between the fresh river water and heavier salt water could results in increased hypoxia, which creat...

Substance protects resilient staph bacteria

...iotic compounds and salt concentrations similar to levels found on human skin. Dr. Otto's group also used mice fitted with catheters to demonstrate that the S. epidermidis strain deficient of PGA was not able to cause infection while the other strains containing PGA did. ...

Chemists identify immune system mechanism for methamphetamine binges

...d be mass produced and administered at therapeutic levels that are high enough to clear the drug from the body, he says. "Methamphetamine has become the ‘crack' of the 21st century," Janda says. "We're just starting to unravel its mechanism of addiction." Further studies of the drug are planned, he adds. ...

Pulsating ultrasound enhances gene therapy for tumors

...gns of the gene. An analysis showed reporter gene levels to be nine times higher in tumors treated with pulsed-HIFU compared with tumors left unexposed. Researchers were especially encouraged by the results because the type of cancer treated in the study--squamous cell carcinoma, found in head and neck tu...

Viral protein influences key cell-signaling pathway

...um to leak out of the RER, thereby causing calcium levels to rise elsewhere in the cell. "Calcium is exquisitely regulated in cells," Lairmore says. "When p12 affects that balance, it affects the activity of a variety of genes." The current study used a non-infectious form of HIV to transplant the HTLV-1 ...

Polymers with copper show promise for implanted sensors

...tinuously monitor oxygen, acidity (pH), or glucose levels is a major challenge for analytical chemists and b...od, then it may not generate adequate nitric oxide levels and it may not prevent clotting," said Meyerhoff. To get at these questions, the researchers have de...

Robot-based system developed at Carnegie Mellon detects life in Chile's Atacama desert

...other remote methods capable both of detecting low levels of micro-organisms and visualizing high levels incorporated as biofilms or colonies," said Gregory Fisher, project imaging scientist. "Our fluores...

Reducing malarial transmission in Africa

...adequate absorption there might be inadequate drug levels in the blood of many treated individuals. The authors conclude that although co-artemether as a first-line treatment is not likely to reduce overall transmission of Plasmodium falciparum within the community it might reduce selective transmission of ...

Discovery Promises Simpler Therapy for Sickle Cell Disease

...ptoms cause blood vessels to constrict when oxygen levels drop, they found, a response which would further exacerbate the oxygen deficiency. Treatment of red blood cells with nitric oxide reversed that effect, they reported. "Our results suggest that abnormal blood vessel control by red blood cells contrib...

Stem Cell Research Shows Potential for Replacing Tissue Damaged in Heart Attacks

...ever, that the research has achieved unprecedented levels of success in this area. Dr. Lough’s laboratory currently is developing support to expand these findings in several areas that will provide additional information. First, they want to identify the factors from precardiac endoderm that induce cardiac...

Alaskan puzzles, monitoring provide insight about North Pacific salmon runs

...eather, lake levels, emerging insects, zooplankton levels and other fish species and juvenile salmon growth, which distinguishes the data set from other salmon monitoring records. ...

No relief for Pacific Northwest drought

...ng will only get worse in coming months, and reach levels that were generally seen during the Dust Bowl of the 1930s," said Ronald Neilson, a bioclimatologist with the U.S. Forest Service and professor of botany at OSU. Severe drought does not automatically translate into major fires, said Neilson and coll...

Increased risk of osteoporosis associated with gene that one in five people have

...n women who had significantly lower blood estrogen levels and higher levels of urinary estrogen breakdown products than normal. These women also had a higher than normal urinar...

Researchers identify protein crucial for survival of Lyme-disease bacterium

... and begins to go through its molting process, the levels of the knockout Bb bacteria in the tick drop by ab... the study, each time infected ticks fed, bacteria levels within them dropped until they eventually were zero. "We're not sure whether the lack of the BptA p...

Glow-in-the-dark zebrafish at UH hold keys to biological clocks

...The protein that it encodes is produced at highest levels near dawn, and when the luc gene is inserted into it, the luciferase protein is produced in a similar way. The result is that these fish glow rhythmically, emitting more light during the day than during the night. The amount of light is below the lev...

New lab technique identifies high levels of pathogens in therapy pool

...bably became ill because they were exposed to high levels of the pathogens by working consecutive, full days...m very basic and important issues." Higher winter levels of airborne pathogens in such enclosed pool areas are likely due to seasonal ventilation practices, ...

New drug shows promise as powerful anticancer agent

...at plays a key role in driving cell division. High levels of Plk1 have been observed in many human tumors, and studies using various laboratory techniques have shown that inhibition of Plk1activity leads to cell death. "Because all signaling pathways that have gone awry in a cancer cell ultimately affect ce...

Scientists identify molecule that regulates well-known tumor suppressor

...cers with normal PTEN also exhibit abnormally high levels of PKB/Akt activity. In a quest to determine what ... suppressor. In studies with mammalian cells, low levels of DJ-1 correlated with decreased PKB/Akt activity, while increased DJ-1 led to activation of PKB/Ak...

Survey finds silver contamination in North Pacific waters

The highest levels of silver contamination ever observed in the open ... natural background level. Though still well below levels that would be toxic to marine life, this contamination of what had been considered relatively pristi...

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