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chemicals News
China May Be Building a Laser to Target US Satellites
Jan 1, 1999 — The Chinese government may be building a high-power laser with the ability to destroy US military satellites hovering over Asia, according to a recent article in The Los Angeles Times. The newspaper cited a declassified report from the US Department of Defense that provided an "educated prediction" but no conclusive proof of the effort. Sources at the Pentagon said China may have enlisted the help of Russian scientists to help carry out the project. Such a laser likely would be modeled after...
Researchers Introduce Fluorescent Chemical Weapons Detector
Jan 1, 1999 — Chemists at the University of Maryland in College Park have developed a method for detecting lethal chemical weapons in a system that uses molecules that fluoresce in the presence of a small amount of phosphate esters. Many current detectors are...
Laser Unveils a 3-D Model of Chaos
Sep 1, 1998 — Does coffee taste different if you pour the cream into the cup first? Does the temperature of the cream influence the texture? These were the questions one recent technical conference attendee was exploring aloud during a midmorning coffee break....
Living Sensors Glow at Change
Aug 1, 1998 — Colonies of luminescent bacteria promise to become biological sensors capable of detecting a variety of parameters such as temperature, pressure or specific chemicals. The microbes, engineered at Britain's chemical and biological defense laboratory,...
Photodynamic Therapy:
Aug 1, 1998 — A relatively new technology called photodynamic therapy is revolutionizing the treatment of some types of cancer. In this treatment, a physician injects a patient with a photosensitive chemical. When activated by light, these chemicals combine with...
Photonics Shares in Environmental Advances
Jul 1, 1998 — Applications of photonics technology in research and development over the past decade have helped to create many technologies that will improve water safety, reduce wasted paper and make manufacturing and agriculture more environmentally friendly in...
Fluorescence Spectroscopy Reveals Cell's Components
May 1, 1998 — A team of researchers at the University of Illinois has employed fluorescence spectroscopy to find and analyze compounds crucial to cell metabolism. Traditionally, scientists trying to detect compounds such as serotonin or tryptamine in animal cells...
Photodynamic Therapy Offers New Medical Treatments
May 1, 1998 — For years now, doctors have used ultraviolet lamps to treat psoriasis and to kill airborne tuberculosis bacteria, and lasers have made deep inroads as "bloodless scalpels." Recently, however, the US Food and Drug Administration (FDA) approved a...
Diode Lasers Pinpoint Pollutants
Apr 1, 1998 — Diode-lasers have experienced limited success as environmental monitors because polluting chemicals weakly absorb light at commercially available diode-laser wavelengths. Also, although diode lasers offer one of the fastest and most sensitive ways...
Eco-Optics:
Apr 1, 1998 — Since the 1980s, people have grown more aware of their surroundings, the impact of industry on the environment, and the environmentally redemptive qualities of advanced technology. Whether it's a UV lamp optimized to detect mercury and other...
Fiber Optic Sensors Sniff Out Chemicals
Apr 1, 1998 — Fiber Optic Sensors Sniff Out Chemicals
Spectroscopic Technique Images Cell Physiology
Apr 1, 1998 — Chemists and physiologists from the University of Illinois at Urbana-Champaign have developed an imaging technique that relies on fluorescence spectroscopy to provide detailed information about a cell's physiology. The scientists combined...
Raman Spectroscopy Detects Herbicides in Water
Feb 1, 1998 — Raman Spectroscopy Detects Herbicides in Water ANN ARBOR, Mich. -- Researchers at the University of Michigan have employed Raman spectroscopy to measure two herbicides in water. The herbicides, paraquat and diquat, contain chemicals that cause plant...
Honey, I Shrunk the Lab
Jan 1, 1998 — PRINCETON, N.J. -- In a development reminiscent of Hollywood, chemists may soon find their extensive laboratory set-ups reduced to the size of a small laptop computer. Luckily, the chemists themselves can remain full size. Using microfabrication and...
Lasers Track Air Pollution
Jan 1, 1998 — Chemical emissions in the Earth's atmosphere profoundly affect the weather. When dust, soot, ice or sea salt act as catalysts, atmospheric chemicals can reduce or contribute to smog, global warming and the ozone hole. Scientists studying climate...
Molecular 'Antenna' Captures Light
Jan 1, 1998 — Researchers from the University of Michigan at Ann Arbor and the University of Illinois at Urbana-Champaign have developed a class of dendrimer molecules that "harvest" light. The molecules have a unique, treelike structure that enables them to...
Optical Gel Senses Chemicals
Jan 1, 1998 — PITTSBURGH -- By forming a functionalized gel around an array of colloidal particles, researchers have created a sensor that indicates the presence of specific chemicals by a shift in the gel's optical diffraction. Now they can use optical methods...
Sensors' New Clothes Enhance Efficiency
Nov 1, 1997 — ALBUQUERQUE, N.M. -- A new coating for chemical sensors promises to increase their sensitivity by a factor of 500. The porous coating, developed at Sandia National Laboratories, is less than 1 µm thick, but its extremely high surface area makes...
US Navy Uses Acousto-Optic Device to Detect Chemicals
Nov 1, 1997 — An acousto-optic tunable filter instrument worked comparably to a CCD-based monochromator for a recent chemical warfare detection test, according to US military researchers. K. Ewing of the Naval Research Laboratory in Washington explained during a...
FTIR Examines Engine Deposits
Oct 1, 1997 — CHESTER, UK -- Collaborators from Queen's University in Kingston, Ontario, Canada, and the Shell Research and Technology Centre Thornton in Chester have combined chemical separation with Fourier transform infrared (FTIR) spectroscopy to examine...
Researchers Patent Handheld Probe
Oct 1, 1997 — SEATTLE -- For more than 15 years, scientists have fine-tuned a technique that determines the presence and concentration of chemicals by analyzing reflected light. Known as surface plasmon resonance, the technique is useful for detecting pollution...
Clue to Boy's Killer
Sep 1, 1997 — Laser enhances image In the Martinez case, forensic specialists applied super-glue (cyanocrylate) fumes to the print and rinsed the surface with rhodamine, a fluorescent dye. Then they exposed the print to the laser; the light was passed through an...
New Regulation Hits California Optics Makers
Sep 1, 1997 — DIAMOND BAR, Calif. -- Optics companies in Southern California will have to change dramatically the way they clean their manufacturing systems, according to a regulation recently passed here. In what it calls its biggest step against airborne...
Europeans Aim to Decorate Plastics
Aug 1, 1997 — Lambda Physik has teamed up with several partners for the European Brite/Euram III development program to design a system for laser decoration. The proposed system will create permanent multicolor patterns and photographic images directly on various...
Integrated Circuit Uses 'Critters' to Detect Contamination
Jun 1, 1997 — OAK RIDGE, Tenn. -- What's half living, half machine and can sniff out pollutants and chemicals in a single whiff? The latest microsensor technology from the US Department of Energy's Oak Ridge National Laboratory (ORNL) combines living luminescent...
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June 2024
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