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Tag: "laser" at biology news

Teenager moves video icons just by imagination

...'70s. The player controls the motions of a movable laser cannon that moves back and forth across the bottom of the video screen. Row upon row of video aliens march back and forth across the screen, slowly coming down from the top to the bottom of the screen. The objective is to prevent any one of the alien...

U-M researchers use nanoparticles to target brain cancer

...the blood stream to tumor cells; a special type of laser light activates the drug to attack the tumor. Iron oxide is a contrast agent used to enhance magnetic resonance imaging, or MRI. "Photofrin goes into tumor blood vessels and collapses the vasculature, which then starves the tumor of the blood flow...

Silver bullet: UGA researchers use laser, nanotechnology to rapidly detect viruses

...asuring the change in frequency of a near-infrared laser as it scatters off viral DNA or RNA. This change in frequency, named the Raman shift for the scientist who discovered it in 1928, is as distinct as a fingerprint. This phenomenon is well known, but Tripp explained that previous attempts to use Ram...

Detecting microalgae in coastal waters

...ET project to develop a field stage prototype of a laser fluorometer that detects multiple target pigments and can differentiate between different types of algae. "Knowledge is power. We hope this instrument will characterize microalgal populations rapidly and easily, for instance for pre-screening sa...

Nano-devices hold promise for early-stage cancer detection

..., imaging, computing, wireless communications, and laser and radiation detection systems. Research currently underway includes: a miniature (pill-sized) device that will provide early detection of abnormal cells inside the body; an imaging and communication system for non-invasive screening in t...

Scientists get best look ever at water-life connection

...an assistant professor of physics, used ultra-fast laser pulses to take snapshots of water molecules moving around a protein taken from a common bacterium, Staphylococcus. The key to getting a good view of the interaction was to precisely locate an optical probe on the protein surface. They inserted a mol...

The appearance of your hands can reveal your age, study finds

...ckness and fullness. Non-surgical procedures like laser treatments and chemical peels can reduce age spots...mp up hands and reduce the visibility of veins and laser ablation of unwanted hand veins can reduce veins." ...

Prevention is the best option: fighting autoimmune diseases

...ment at the Centenary Institute. The machines use laser beams and advanced optics and electronics toanalyse and purify many kinds of cells at a rate of over 25,000 cells every second. This technology is able to produce results that cannot be obtained by any other method as it allows every cell to be ident...

Flick of whiskers helps tease out brain's 'shadow' signaling system

...for astrocyte activity, developing a sophisticated laser system to look at their activity by measuring the ...nt Xiaohai Wang, M.D., led a team that focused the laser system on the brain cells of mice as their whiskers were gently pushed about with gentle puffs of ai...

FSU biologists uncover mechanisms that shape cells for better or worse

... oocyte" -- relied heavily on the state-of-the-art laser confocal microscope in FSU's Biological Science Imaging Resource facility. Funding for the research came in part from the American Heart Association. ...

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

...omes") inside a tiny chamber on a slide. A green laser is then used to excite the molecules in individual droplets, and the light 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 f...

MIT 'seeing machine' offers hope to blind

... eyes with a diagnostic device known as a scanning laser opthalmoscope, or SLO. With the machine they proje... the SLO. The new seeing machine also replaces the laser of the SLO with light-emitting diodes, another source of high-intensity light that is much cheaper. ...

Purdue creates new low-cost system to detect bacteria

...oped a new low-cost system that analyzes scattered laser light to quickly identify bacteria for application...Optical Scattering Technology - works by shining a laser through a petri dish containing bacterial colonies growing in a nutrient medium. "Unlike conventio...

Rice scientists make first nanoscale pH meter

Using unique nanoparticles that convert laser light into useful information, Rice University scientists have created the world's first nano-sized pH meter. The discovery, which appears online this week in the journal Nano Letters, presents biologists with the first potential means of measuring ...

Epidemic of unneeded amputations

...ss. The CLiRpath procedure, using a "cool" excimer laser and catheter system developed by Spectranetics Corp. (NASDAQ: SPNC), vaporizes arterial blockages, restores blood flow, and this surgery promotes wound healing, often enabling patients to leave the hospital the next day. CLiRpath has been the subject...

Inside rocks, implications for finding life on Mars

...f said the techniques he has used, called confocal laser scanning microscopy and Raman spectroscopy, could ...her technique, but now we can, because of confocal laser scanning microscopy. In addition, even though the fossils are exceedingly tiny, the images are sharp...

New 'implanted contacts' designed to fix nearsightedness

...corrections are outside the parameters for routine laser procedures, said Dr. Steven Verity, associate prof...eal surgery. Rather than reshaping the eye, as in laser surgery, or replacing the eye's natural lens, as with intraocular lenses, the collamer lens is ins...

Stable polymer nanotubes may have a biotech future

...h an "optical scalpel" (highly focused ultraviolet laser pulse). The nanotubes maintain their shape even after several weeks of storage, and can be removed from the liquid solution and placed on a dry surface or in a different container. The optical tweezers can be used to custom build nanotube network str...

Ancient ants arose 140-168 million years ago

...y is essentially a scale for weighing molecules. A laser turns a sample into ionized particles, which are then accelerated in a vacuum toward a detector. The time lapsed prior to registering on the detector helps researchers determine the mass--or weight--of the particles. By targeting characteristic parti...

Researchers use mass spectrometry to detect norovirus particles

...y is essentially a scale for weighing molecules. A laser turns a sample into ionized particles, which are then accelerated in a vacuum toward a detector. The time lapsed prior to registering on the detector helps researchers determine the mass--or weight--of the particles. By targeting characteristic parti...

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