Tag: "recorded" at biology news

'Dead zone' area shrinking, Texas A&M prof says

...re just three weeks before, the oxygen levels were recorded as being extremely low. The dead zone has been studied and tracked since it was discovered 20 years ago, DiMarco says. "We need to do some further research to determine the specific mechanisms under which hypoxia is created, maintained, and ultimatel...

'Most recent common ancestor' of all living humans surprisingly recent

... physical barriers of geography and migration, and recorded historical events. Although such complexities make pure mathematical analysis difficult, it was possible to integrate them into an elaborate computer simulation model. The computer repeatedly simulated history under varying assumptions, tracking the ...

DuPont introduces in-home personal protection from dangers of hurricanes

...r becomes life-threatening. "As a journalist, I've recorded how severe hurricanes and tornadoes affect peoples lives," said Faidley. "In almost every survival story, the family had a plan and some type of shelter to protect themselves from the violent winds and debris. The lack of a quickly accessible prote...

Brain has center for detecting sound motion

... presented moving sounds to the patient while they recorded from the electrodes, they also detected the strongest activity in the right posterior STG. After the operation, however, the patient showed what the researchers dubbed "cortical motion deafness." During perceptual tests, she stated "I do not perceive...

News tips from the Journal of Neuroscience

...stinguish between these candidates, Jackson et al. recorded from dissociated SCN neurons in current clamp and then used the firing pattern of each cell as a voltage command. When the sodium current was blocked, L-type channels were only able to support slow oscillations at more depolarized potentials. 2.T...

Identifying tick genes could halt disease, bioterrorism threat

...002 the Centers for Disease Control and Prevention recorded approximately 24,000 cases of the often-misdiagnosed and under-diagnosed illness. This was a 40 percent increase over the previous year. A number of ticks in the United States spread pathogens that the CDC considers potential bioterrorism weapons. Th...

Unicellular organisms contribute more nitrogen to ocean that reported earlier

...e coast of northern Australia yielded the highest recorded rates of nitrogen fixation by unicells to date. There are still numerous regions of nutrient-poor oceans typically off the continental shelves from the equator north and south to about 40 degrees latitude about which little or nothing is known in ...

New understanding of the machinery of flinching

...r enhanced or reduced neuronal activity. They then recorded how the monkeys responded to a mild puff of air to the face. The researchers found that the activating drugs enhanced the flinch response--which included a squint, a blink, lifting of the upper lip, flattening of the ears, and a protective arm and sh...

Evolvability could be a driving force in drug resistance

...ions from a sophisticated computer simulation that recorded how much and how rapidly proteins mutated based on external changes in their environment. As the researchers ramped up the frequency and severity of environmental changes -- imagine rapid shifts between heat waves and cold snaps or heavy rains and dr...

Biologists deciphering complex lemur scent language

...dies to understand lemur scent communications. She recorded the rates of different kinds of scent marking by the animals over a year, to link different kinds of markings with different purposes. And, she took monthly samples from the animals' scent glands and analyzed them using instruments in the Department ...

Two-month study of life in mid-Atlantic yields trove of species, new insights & questions

...s of Marine Life ( www.coml.org ), has captured or recorded rare and potentially new species of squid and fish...mi-transparent fish covered in a gelatinous layer, recorded only once before in the North Atlantic. ("Fig. 10." Photo credit: David Shale.) Also among the mo...

Wheelchairs biomechanics, prosthetic development

...ES from the wrist flexor and extensor muscles were recorded in five able-bodied volunteers and two volunteers with spinal cord injury. Volunteers activated 99% of the target states for at least 1 second and matched at least 87% of the target hand positions for at least 2 seconds. The hand grasp neuroprosthesi...

Satellites are tracing Europe's forest fire scars

... legislation had required that all burned areas be recorded and mapped, as no land use change is permitted to occur on such terrain for 15 years after a blaze, no new building construction for the next ten years, and no new publicly funded reforestation for a half-decade. However the mapping of burn scars is...

Springtime blooms seen earlier now than in the past, say Boston University biologists

...dy plants selected with their past flowering dates recorded in the Arboretum's herbarium, the researchers found a significant trend toward earlier flowering. On average, they found the plants flowered eight days earlier during the period 1980 to 2002 than they did 100 years ago. The data also sh...

Geologists discover water cuts through rock at surprising speed

...limate during the last glacial period that is also recorded in ice cores drilled into the Greenland ice sheet," said Luke Reusser, a graduate student of geology at the University of Vermont and lead author of "Rapid Late Pleistocene Incision of Atlantic Passive-Margin River Gorges." "Because bedro...

Antimalarial substances found in New Caledonian sponges

... antiviral or antiparasitic properties. Only 1% of recorded marine species have had their chemical composition analysed. IRD scientists and their partners (1) have investigated the chemical structure of substances extracted from New Caledonian sponges. They demonstrated antimalarial activity in 25 members o...

Heat and exercise alone may not determine how much we sweat

...gnal. Systolic and diastolic blood pressures were recorded every minute by electrosphygmomanometry of the lef...uring recovery modes. Sweat rate was continuously recorded from two sites (right forearm and chest). Results The increase in sweat rate during exercise was s...

Reading hexametric rhyme supports cardiac synchronization, especially after a heart attack

... electrocardiogram and the nasal/oral airflow were recorded simultaneously. The overall duration of each session was 50-60 minutes, divided into three successive measurements: 15 minutes quiet rest in a resting chair, 20 minutes of exercise measurement, and 15 minutes quiet rest in a resting chair. During S1 ...

Argonne scientists determine structure of staph, anthrax enzyme

... at the Midwest Center for Structural Genomics and recorded with the International Protein Data Bank -- that's more than any other structural genomics center. Joachimiak's co-authors are colleagues R-g. Zhang, R-y. Wu and G. Joachimiak at Argonne and S.K. Mazmanian, D.M. Missiakas, P. Gornicki and O Schneewi...

'Anti-plume' found off Pacific Coast

...past dozen years, Dziak and his research team have recorded more than 30,000 earthquakes in the Pacific Ocean off the Northwest coast few of which have ever shown up on land-based seismic equipment. The earthquakes, most having a magnitude of 2.0 to 4.0, originate along the Juan de Fuca Ridge, a submarine m...

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