Download or read book A Resonance Raman Method for Rapid Detection Identification and Quantitation of Bacteria in Sewage and Natural Waters written by Wilfred H. Nelson and published by . This book was released on 1979 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rapid Detection and Identification of Bacteria in Sewage and Natural Waters by Means of Time resolved Laser Spectroscopies written by W. H. Nelson and published by . This book was released on 1983 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research Reports Supported by Office of Water Research and Technology Received During the Period written by and published by . This book was released on 1980 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1980 with total page 1280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1989 with total page 1296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Rapid Detection of Bacteria and Other Microorganisms A Basic Study in the Application of Resonance Raman and Time Resolved Fluorescence Spectroscopies written by Wilfred H. Nelson and published by . This book was released on 1988 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Resonance Raman Spectra have been obtained for a variety of chromobacteria using low power 488 nm excitation. Spectra are simple, of high quality, and useful for identification purposes at the species level. Raman microprobe studies show conclusively that spectra can be obtained from single cells in pure cultures or in mixed cultures without need for separation. Extensions of the study have been made to representative colorless gram-negative and gram-positive bacteria. Spora other than bacteria have been studied as well. Pollen, mold spores, bacterial spores, algae and viruses all give spectra but only viruses and bacterial spores appear to give intense UV Resonance Raman spectra. The primary fluorescence of bacteria has been studied in detail to determined its potential in rapid detection. We have determined fluorescence for S. epidermidis, P. fluorescens, E. cloacae, E. coli and B. subtilis. Fluorescence contributions have been assigned in part to tryptophan, pteridines, related flavins and pyridine coenzymes.
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1986 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Basic Study to Assess the Potential Usefulness of Resonance Raman Spectroscopy as a Means of Rapidly Detecting and Identifying Bacteria and Other Microorganisms written by W. H. Nelson and published by . This book was released on 1985 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: This past year we have explored the potential uses of Resonance Raman and Fluorescence Lifetime Spectroscopies in the rapid characterization of bacteria. Previously we have shown that chromobacteria can be distinguished on the basis of distinctive resonance Raman spectra. Spectra are excited by low power argon ion laser radiation at 488 nm and are due to the presence of carotenoid pigments. While carotenoid pigments in bacteria generally are not useful for identification purposes, the study of chromobacteria has allowed us to assess the potential sensitivity of resonance Raman spectroscopy in this application. We were able to laser illuminate and count two types of bacteria under a microscope. Because it was possible to see the laser excited bacteria while the resonance Raman spectra were being obtained, it was possible to estimate closely the number of bacteria producing a given spectrum. Such high sensitivity suggests but does not prove that spectra are 'surface enhanced'. It is clear that the resonance Raman technique can be highly sensitive and our experiments suggest that remote detection and detection from mixtures is possible in principle.
Download or read book The Rapid Detection of Single Bacterial Cells by Deep UV Micro Raman Spectroscopy written by W. H. Nelson and published by . This book was released on 1992 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Pollution Control written by and published by . This book was released on 1980 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aquatic Sciences and Fisheries Abstracts written by and published by . This book was released on 1986 with total page 996 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1985-09 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Surface enhanced Raman Spectroscopy written by Vinay Bhardwaj and published by . This book was released on 2019 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last decade, we have seen spurring growth in academic and industrial interest in Raman spectroscopy and its modifications, in particular, Surface-Enhanced Raman Spectroscopy (SERS). This is evident by the number of SERS publications in the last decade, from 580 in 2005 to almost 2000 in 2014. There are now companies worldwide that are dedicated to manufacturing SERS substrate, sensors, and other SERS-based products. The miniaturization of Raman instrumentation from bulky and expensive bench-top designs to inexpensive handheld spectrometers has allowed SERS to be employed as an in situ detection technique. Some examples of the industrial success of Raman and SERS are rapid raw material identification (RMID), Process Analytical Technology (PAT) and drug screening in pharma and biotech industries, continuous surveillance of food, water, and environmental safety, and the diagnosis and continuous monitoring of diseases like cancer, diabetes, etc. This progress in translating Raman and SERS techniques into commercial use and commercial products is possible because of the close collaboration between scientists and engineers. However, the weak signals of Raman spectroscopy is an inherent limitation of the spontaneous Raman spectroscopy technique. Therefore, several modifications have been made, including but not limited to, surface-enhanced Raman spectroscopy (SERS), spatially offset Raman spectroscopy (SORS), transmission Raman spectroscopy (TRS), coherent anti-Stokes Raman spectroscopy (CARS), and tip-enhanced Raman spectroscopy (TERS). Spontaneous Raman spectroscopy has become a one-of-a kind, portable, and affordable technology for in-situ detection and continuous monitoring in resource-limited-settings. The primary focus of this textbook is to try to cover the fundamentals in SERS methods of preparing substrates and sensors, and efficient spectral analysis approaches like chemometrics for diverse applications, listed in the paragraph above. However, with a goal to give a true picture to the audience when assessing the scope of spontaneous Raman and Surface-enhanced Raman for specific applications, we have briefly introduced industrially successful examples of other types of Raman spectroscopy techniques, such as SORS, TRS, and CARS.
Download or read book Government Reports Annual Index written by and published by . This book was released on 1986 with total page 1132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Protection Research Catalog Indexes written by Smithsonian Science Information Exchange and published by . This book was released on 1972 with total page 1478 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book SWOrRD Swept Wavelength Resonance Raman Detection of Bacteria Chemical and Explosives written by and published by . This book was released on 2010 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: Detection of bacteria, chemicals or explosives with Raman scattering is fast, noncontact, does not require chemical supplies and is adaptable to robotic vehicles; making Raman ideal for many military and civilian applications. In this technique, a laser is used to illuminate an area which may contain the sought after substance. Some of the laser light is absorbed by the molecular vibrational and rotational states of the substance, and is re-emitted (scattered) at wavelengths slightly different than the wavelength of the illuminating laser.
