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Tag: "count" at biology news

How HIV 'exhausts' killer T cells

... higher the patient's viral load and the lower the count of helper T cells, said Walker. When they co... diagnostic tool, said Walker. "Currently, we just count the number of helper T cells to decide when to treat someone, but we are excited about the possibili...

'Micro-boxes' of water used to study single molecules

...ght emissions over several seconds are analyzed to count the molecules and observe other phenomena. The researchers use two sets of optical tweezers to move droplets together to fuse them and mix their contents (see accompanying video). The team demonstrated the technique by trapping and manipulating dropl...

Scientist-astronaut sends T-cells into space

...hich suppresses them. When an HIV patient's T-cell count falls below 200, he or she is susceptible to the dangerous infections that are the symptoms of acquired immunodeficiency syndrome (AIDS). The problem of immunosuppression in microgravity was first noted during the Apollo moon mission series in the...

New study shows benefit of early therapy in HIV-infected infants

...mmune status. They call this age-adjusted CD4 cell count the "z-score." Based on data collected over the p... to attain a 20 percent increase in their CD4 cell count z-score at any time, compared to children who started treatment before 5 months." However, the auth...

The diversity of marine life in the Gulf of Maine region is much greater than previously thought

... Andrews, New Brunswick, announced today the first count of known marine species in the Gulf of Maine regio...re than 50% larger than previous estimates. The count is 3,317 species and includes both year-round species and those that migrate to the region seasonall...

Molecular mechanism may explain how fevers spark seizures

... and counting the cars on the street: it's easy to count how many are there at any time, but if we want to know where they all came from and where they're all going, that's a whole different problem." The team's discovery that high temperature reduces cell surface GABA-A receptor levels "raises the idea ...

Measuring artery repair cells could become new heart disease test

... sample, then culture the remaining cells and then count individual of EPC colonies that grow. The new system permits researchers to gauge the number of EPCs based by identifying those cells with a high amount of ALDH activity. The Duke researchers based their studies on analysis of blood samples taken fr...

Oops! Researchers publish new findings on the brain's response to costly mistakes

...nded in healthy individuals when we made the error count more." The new research confirms previous U-M studies using a different brain-activity monitoring technique and led by senior author William Gehring, Ph.D., Arthur F. Thurnau Professor of Psychology in the U-M College of Literature, Science, and the...

Cheap, rapid hand-held check for HIV

... definitions of AIDS say that once a person's CD4+ count falls below 200 cells per microlitre of blood, he or she has developed the condition. Doctors rely on CD4+ measurements to decide when to start drug treatments and to gauge whether a patient is responding to them. To make the device, researchers ...

Color perception is not in the eye of the beholder: It's in the brain

...by our eyes. "We were able to precisely image and count the color-receptive cones in a living human eye for the first time, and we were astonished at the results," says David Williams, Allyn Professor of Medical Optics and director of the Center for Visual Science. "We've shown that color perception goes ...

HIV Therapy Greatly Extends Life of Key T Cells, Scientists Find

...cell DNA at each time point, the researchers could count how many new cells were made and how long they lived. The scientists found a marked increase in the numbers of newly made CD4+ cells in all the HIV-positive, IL-2 responsive volunteers. In two HIV-positive volunteers ?each of whom had received multi...

Say what? Bacterial conversation stoppers

...rum sensing, bacteria converse among themselves to count their numbers and to get the population to act in unison. A synchronized group of bacteria can mimic the power of a multi-cellular organism, ready to face challenges too daunting for an individual microbe going it alone. Swelling populations trigger ...

Siberian tigers hang tough

...e, say the coordinators of a 2005 winter effort to count the animals, led by the New York-based Wildlife Co...ey represents the most extensive effort to date to count tigers in Russia. Tiger conservationists around the world were buoyed by these results, especially ...

Six previously blind patients detect light, motion, identify objects with retinal prostheses

... months-were able to "localize the position of, or count the number of, high contrast objects with 74 to 99 percent accuracy," Humayun says. In addition, they could discriminate simple shapes-i.e., figure out the spatial orientation of a bar or the capital letter L-with 61 to 80 percent accuracy. The rese...

Comparison of Cocaine, Methamphetamine ‘Highs?Finds Differences

... in this week's Science Magazine with a new way to count bugs in dirt. Bacteria, that is, in the highly complex world beneath our feet. "Computational Improvements Reveal Great Bacterial Diversity and High Metal Toxicity in Soil," by Jason Gans, Murray Wolinsky and John Dunbar, of Los Alamos' Bioscience D...

Using computers and DNA to count bacteria

... in this week's Science Magazine with a new way to count bugs in dirt. Bacteria, that is, in the highly complex world beneath our feet. "Computational Improvements Reveal Great Bacterial Diversity and High Metal Toxicity in Soil," by Jason Gans, Murray Wolinsky and John Dunbar, of Los Alamos' Bioscience D...

Recombinant DNA technology may enable oral, rather than injectable, delivery of protein drugs

...that work to keep an individual's white blood cell count at normal levels during chemotherapy. After that,...hen tested in mice, increased the white blood cell count for three days, whereas the injectable agents only maintain effectiveness for one day," Shen says. "...

Newest HIV drugs should be used with FUZEON(R)

...fe. Getting back to undetectable and seeing my CD4 count increase from 20 to 268 has changed my outlook on life. I believe I can plan for the future, which I didn't even consider doing before starting this regimen. I have much more energy now than I had before, which is exhilarating since I have been held ...

Studies reveal how plague disables immune system, and how to exploit the process to make a vaccine

...ulation. It returned with a slightly reduced death count about once a generation for centuries. Although far less common now, the plague has not entirely gone away. There are fewer than 2,000 cases a year worldwide, including 10 to 20 each year in the western United States. One out of seven persons infect...

TrueBlue Archive Will Store Raw Life Sciences Data for Proteomics and Drug Testing

...support for possible acts of bioterrorism, medical count ermeasures, emerging threats and future preparation, and development of diagnostic tests for identifying biological warfare pathogens. Intended for researchers, physicians, and policy makers, Biological Weapons Defense: Infectious Disease and Counte...

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