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Tag: "needle" at biology news

3-D ultrasound scanner provides in-depth view of the brain

...nivasan Mukundan of Duke Medical Center directed a needle into a particular region of the animal's brain, as is required in surgeries to drain cerebrospinal fluid and relieve pressure on the brain. In a second animal, the researchers made use of dyes to enhance ultrasound images of blood vessels in the brai...

An 'elegant' idea proves its worth 25 years later

...ere patients come in near-comatose and you stick a needle in them and lo and behold, they wake up—just like that. It was just astonishing," he says. "His elegant idea was to give patients chemicals they already make in small amounts in large doses to make up for the missing urea cycle enzyme they inheri...

Anthrax paralyzes immune cells with lethal toxin, UF research shows

...ld say it's the scientific equivalent of finding a needle in a haystack," Southwick said. The team compared before and after snapshots of neutrophils exposed to a purified form of the toxin, as well as images showing how protein expression changed in cells. After scrutinizing the images for hours, During...

Researchers design pulsed mircrojet system to deliver protein drugs without pain or bruising

...s is driven by a combination of factors, including needle phobia, pain and discomfort, infections, and accidental needle sticks to healthcare providers. Currently, about 12 billion needle injections are performed every ye...

Nanotechnology meets biology and DNA finds its groove

...e new technique is akin to threading a microscopic needle with a thread of DNA, explains Juan de Pablo, a UW-Madison professor of biomedical engineering and a co-author of the study. The team has a way, he says, of "positioning the DNA molecule right where we want it to be. It is important that we can manip...

UW launches study testing adult stem cells for heart damage repair

...f the pain. Next, all subjects receive a series of needle shots, typically delivered under the skin in the arm, thigh or abdomen of a commercially produced protein (granulocyte colony stimulating factor). The protein helps to release blood-forming CD34+ cells from a subject's bone marrow into the bloodstre...

Einstein's tea leaves inspire new blood separation technique

...tiny amount of blood enters a fluid chamber, and a needle tip is placed close to the surface of the blood at an angle. A voltage is applied to the needle, generating ions around its tip that repel the oppositely charged ions close to it. This creates an airflow known as "ionic wind" that sweeps across the s...

Gene expression test reveals ER and HER-2 status of breast tumors

...seven institutions. The samples included both fine needle aspiration biopsies and traditional biopsies. The team used 195 fine-needle biopsy samples to set gene expression thresholds that predicted ER-positive status with 90 percent accuracy and HER-2-positive status with 93 percent accuracy. They then a...

Ultrasound upgrade produces images that work like 3-D movies

...ing animals of a heart valve and blood vessels and needle biopsies of the animals' brains and esophagi. The researchers have since recorded ultrasound images of a model human fetus that is traditionally used in the testing of fetal ultrasound imaging devices. (Watch the video, including paired images of ...

Spelling out cancer on the nanoscale

... BCL2, and AKT, in tiny samples drawn as very fine needle aspirates from hematopoetic tumor cells in preclinical transgenic mouse models. The nano-fluidic system physically separates the proteins in very small capillary tubes and then uses antibodies for protein detection. It was also tested on human lympho...

Pleasure and pain: Study shows brain's 'pleasure chemical' is involved in response to pain too

...sed by the actual research setup, which included a needle inserted into a large jaw muscle, and the expectation of pain and repeated questioning. Similarly, dopamine release in two other areas of the basal ganglia ?the putamen and caudate nucleus ?was strongly correlated with the rating of how intense a...

3-D ultrasound scanner could guide robotic surgeries

... animal that had died. (An ultrasound video of the needle traveling toward and then precisely puncturing the....php .) "Once the robot takes over, it sends the needle to within about 1.5 millimeters of the center of the target," Smith said. "That's pretty good accura...

Researchers find cause of frontotemporal dementia

..., loss of cognitive functions. Looking for the needle in the haystack Genetic research has previously shown that FTD is caused by a defect in chromosome 17. Chromosome 17 is the carrier of the tau protein's hereditary code, and defects in this protein cause tau-positive FTD. However, there is another f...

New GI technologies improve internal organ visualization

...al difficulties in injecting each artery. The 25g needle did not cause any visible vascular damage, though the 22g needle caused a puncture and the 19g needle caused limited bleeding. The contrast injection was easiest wit...

Inflammation and drugs to control this activity studied in a variety of tumors sites

...nd his co-workers examined the results of prostate needle biopsies from 177 men between ages 47 and 83 years who were at high risk for developing cancer based on either high PSA scores or abnormal DREs. Of the 177 men, 144 or 81 percent were found to have chronic prostate tissue inflammation. The scientis...

Measuring artery repair cells could become new heart disease test

...lating, we literally need a method that can find a needle in a haystack. Our tests so far measuring using ALDH activity to measure EPCs represents a novel approach to solving this problem. "The paradigm of atherosclerosis is changing. In the past we only thought of the risk factors we could measure, such a...

Utah researchers confirm chromosome may harbor autism gene

...search ahead of them. "We're just looking for the needle in the haystack," Coon said. Along with the original family, the U researchers are studying two more families with autism in some members, and they'd like to find others in which the disorder occurs. Large and small families with individual or multi...

Researchers develop portable 'vein finder' for faster, more accurate injections

..., it's still easy to miss when you try to insert a needle into the tissue below." The Doppler effect is a ...ile a disposable coupler box holds a reflector and needle guide. The needle guide is positioned parallel to the sound beam being transmitted by a transducer i...

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

...ps most affected by HIV/AIDS in the border region, needle sharing among injection drug users leads to increased HIV infection, and Tijuana is on a major drug-trafficking route. The model used in the study suggests that injection drug use and sex trade may be driving the HIV epidemic in Tijuana. The popula...

Storing carbon to combat global warming may cause other environmental problems, study suggests

...roadly." Together with nutrient removal, leaf and needle fall from plantation trees can also acidify soils, wrote the authors. "Globally, plantation soils were more acidic in 98 of 114 cases," their study said. In addition, the study cited cases where tree plantations might improve the environment. One ex...

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