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Tag: "pulsed" at biology news

Color-blind method opens new doors in DNA sequencing

... The new method developed at BCM and Rice, called pulsed multiline excitation, uses four lasers, each matched to a particular dye. PME enables the researchers to take advantage of the entire visible spectrum, eliminating the problem of cross-talk between dyes, said Metzker. Because there are four lasers, ...

New neurons take baby steps in the adult brain

...ifts the constant barrage of GABA in step one to a pulsed exposure. The third and final step occurs when the new neuron receives connections that communicate via another chemical, the critical excitatory messenger glutamate. In the adult brain, glutamate is the most prevalent excitatory chemical, and GABA ...

Research tracks whales by listening to sounds

...les in the eastern Pacific have a very low-pitched pulsed sound, followed by a tone," Mellinger said. "Other populations use different combinations of pulses, tones and pitches. The difference is really striking, but we don't know if it is tied to genetics, or some other reason. "There are also some hybrid...

Ultrasound may help regrow teeth

...o reform human dental tissue. Using low-intensity pulsed ultrasound (LIPUS), Dr. Tarak El-Bialy from the Faculty of Medicine and Dentistry and Dr. Jie Chen and Dr. Ying Tsui from the Faculty of Engineering have created a miniaturized system-on-a-chip that offers a non-invasive and novel way to stimulate ja...

Researchers discover how bacteria sense their environments

...ell, developed the spectroscopic technique, called pulsed electron spin resonance dipolar spectroscopy. The researchers suggest that when one receptor detects, for example, a sugar in its environment, communication of some sort triggers an array of linked receptors to rearrange itself, much like when wat...

How blood flow dictates gene expression

...ls that line blood vessels, is activated by rapid, pulsed blood flow, as reported in the December issue of Developmental Cell. Understanding Klf2's role in blood vessel and muscle biology could help with fighting atherosclerosis. "We always knew that there had to be this line of communication from the ve...

Edge density key to controlling gypsy moth spread

...ys Bjornstad. "This is the first identification of pulsed invasions for an invading species." Bjornstad; D...th across the boundaries. The model showed that no pulsed expansion exists for populations unaffected by the Allee effect. However, when the it is a factor, n...

Novel vaccine shows promise against early-stage breast cancer

...: treatment of early breast cancer using HER-2/neu pulsed dendritic cells Multiple genetic targets have been discovered that may help fight breast cancer, including BRCA, estrogen receptors, and HER-2/neu, all of which have been known to predict the severity of disease, recurrence and overall survival. ...

New sensor detects gaseous chemical weapon surrogates in 45 seconds

...e form of optical absorption spectroscopy, where a pulsed laser beam creates a brief absorption in a sample gas, which in turn creates a very small acoustic signal. A miniature quartz tuning fork acts as a "microphone" to record the resulting sound wave. PNNL researchers paired multiple QCLs with the tun...

Cancer vaccines -- Taking a jab at cancer by stimulating the immune system

...ses autologous (patients?own) dendritic cells (DC) pulsed with a combination of three peptides: two that trigger cytotoxic T cells, which directly kill targeted tumor cells, and one peptide that stimulates helper T cells. Altogether, it is an approach that not only excites the killer T cells into actio...

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

...es, of Los Gatos, California, has designed a novel pulsed microjet system engineered to deliver protein drug... negative reactions of nerves and capillaries. The pulsed mircrojets engineered by the researchers combine high velocity (more than 100 meters per second) wi...

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