Download or read book Near Infrared Surface Enhanced Raman Scattering SERS Mediated Identification of Single Optically Trapped Bacterial Spores written by and published by . This book was released on 2003 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: A novel methodology has been developed for the investigation of bacterial spores. Specifically, this method has been used to probe the spore coat composition of several Bacillus species. This technique may be useful in many applications; most notably, development of novel detection schemes toward potentially harmful biological agents. This method would also be useful as an ancillary environmental monitoring system where sterility is of importance (i.e., food preparation areas as well as invasive and minimally invasive medical applications). This unique detection scheme is based on the near-infrared (NIR) Surface-Enhanced-Raman-Scattering (SERS) from single, optically trapped, bacterial spores. The SERS spectra of several bacterial spores in aqueous media have been measured using SERS substrates based on 60-nm diameter gold colloids bound to 3-Aminopropyftriethoxysilane derivatized glass. The light from a 785-nm laser diode was used to capture/manipulate as well as simultaneously excite the SERS of an individual bacterial spore. The collected SERS spectra were examined for uniqueness and the applicability of this technique for the species identification of bacterial spores.
Download or read book Frontiers of Surface Enhanced Raman Scattering written by Yukihiro Ozaki and published by John Wiley & Sons. This book was released on 2014-02-19 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive presentation of Surface-Enhanced Raman Scattering (SERS) theory, substrate fabrication, applications of SERS to biosystems, chemical analysis, sensing and fundamental innovation through experimentation. Written by internationally recognized editors and contributors. Relevant to all those within the scientific community dealing with Raman Spectroscopy, i.e. physicists, chemists, biologists, material scientists, physicians and biomedical scientists. SERS applications are widely expanding and the technology is now used in the field of nanotechnologies, applications to biosystems, nonosensors, nanoimaging and nanoscience.
Download or read book Surface Enhanced Raman Spectroscopy written by Marek Prochazka and published by Springer. This book was released on 2015-12-12 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives an overview of recent developments in RS and SERS for sensing and biosensing considering also limitations, possibilities and prospects of this technique. Raman scattering (RS) is a widely used vibrational technique providing highly specific molecular spectral patterns. A severe limitation for the application of this spectroscopic technique lies in the low cross section of RS. Surface-enhanced Raman scattering (SERS) spectroscopy overcomes this problem by 6-11 orders of magnitude enhancement compared with the standard RS for molecules in the close vicinity of certain rough metal surfaces. Thus, SERS combines molecular fingerprint specificity with potential single-molecule sensitivity. Due to the recent development of new SERS-active substrates, labeling and derivatization chemistry as well as new instrumentations, SERS became a very promising tool for many varied applications, including bioanalytical studies and sensing. Both intrinsic and extrinsic SERS biosensing schemes have been employed to detect and identify small molecules, nucleic acids and proteins, and also for cellular and in vivo sensing.
Download or read book Principles of Bacterial Detection Biosensors Recognition Receptors and Microsystems written by Mohammed Zourob and published by Springer Science & Business Media. This book was released on 2008-09-03 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt: Principles of Bacterial Detection: Biosensors, Recognition Receptors and Microsystems will cover the up-to-date biosensor technologies used for the detection of bacteria. Written by the world's most renowned and learned scientists each in their own area of expertise, Principles of Bacterial Detection: Biosensors, Recognition Receptors and Microsystems is the first title to cover this expanding research field.
Download or read book Advanced Spectroscopic Methods to Study Biomolecular Structure and Dynamics written by Prakash Saudagar and published by Elsevier. This book was released on 2022-09-28 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Spectroscopic Methods to Study Biomolecular Structure and Dynamics presents the latest emerging technologies in spectroscopy and advances in established spectroscopic methods. The book presents a guide to research methods in biomolecular spectroscopy, providing comprehensive coverage of developments in the spectroscopic techniques used to study protein structure and dynamics. Seventeen chapters from leading researchers cover key aspects of spectroscopic methods, with each chapter covering structure, folding, and dynamics. This title will help researchers keep up-to-date on the latest novel methods and advances in established methods. Presents current, emerging, and evolving advances and applications of spectroscopic techniques in the study of biomolecules, including proteins and nucleic acids Discusses contemporary spectroscopic techniques used to study biomolecular structure, interaction, and dynamics
Download or read book Bioaerosol Detection Technologies written by Per Jonsson and published by Springer. This book was released on 2014-07-31 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is intended to give technological background and practical examples, but also to give general insight into the on-going technology development in the area of biodetection. The content is therefore suitable for an array of stakeholders (decision makers, purchasing officers, etc.) and end-users of biodetection equipment within the areas of health, environment, safety and security, and military preparation. The book is divided into three sections. The first section discusses the fundamental physical and biological properties of bioaerosol's. The second section goes into more detail and discusses in-depth the most commonly used detection principles. The third section of the book is devoted to technologies that have been used in standoff applications. The last section of the book gives an overview of trends in bioaerosol detection. The reader of this book will gain knowledge about the different biodetection technologies and thus better judge their capabilities in relation to desired applications.
Download or read book Biomedical Vibrational Spectroscopy written by and published by . This book was released on 2006 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Index Medicus written by and published by . This book was released on 2004 with total page 1876 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. for 1963- include as pt. 2 of the Jan. issue: Medical subject headings.
Download or read book Opto Ireland 2002 written by Werner J. Blau and published by . This book was released on 2003 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Smart Medical and Biomedical Sensor Technology written by and published by . This book was released on 2006 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Novel Spectroscopic Methodology for the Investigation of Individual Bacillus Spores written by and published by . This book was released on 2005 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: A methodology has been developed for the investigation of bacterial spores. Specifically, this method has been used to probe the spore coat composition of two different Bacillus stearothermophilus variants. This unique detection scheme is based on the NIR Surface-Enhanced-Raman-Scattering (SERS) from single optically trapped, bacterial spores. The light from a 787-nm laser diode was used to trap/manipulate as well as simultaneously excite the SERS of an individual bacterial spore. Comparison of normal Raman and SERS spectra reveal not only an enhancement of the normal Raman spectral features but also the appearance of spectral features absent in the normal Raman spectrum.
Download or read book Advanced Environmental Chemical and Biological Sensing Technologies written by and published by . This book was released on 2006 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Towards Near field Single Molecule Surface Enhanced Raman Scattering Detection written by Li-Lin Tay and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The surface enhanced Raman scattering spectra of crystal violet and R6G and a number of colourless molecules adsorbed on silver colloid aggregates were studied as a function of power and position using a Raman microscope. The anti-Stokes signals of the dye molecules show line intensities much greater than the expected on the basis of the Boltzmann equilibrium population of the excited vibrational state. The large anti-Stokes intensities are attributed to the difference in Stokes and anti-Stokes Raman cross-sections resulting from pre-resonance or resonance Raman processes in the adsorbate-substrate complex rather than to optical pumping of molecular vibrational excited states as proposed by Kneipp and co-workers [Phys. Rev. Lett., 76, 2444, 1996]. Far-field imaging with a Raman microscope shows no significant inhomogeneity of the Raman enhancement in the images of the deposited self-affine silver colloid clusters down to spatial resolutions of I [mu]m2. A near-field scanning optical microscope (NSOM) operating with a shear-force feedback distance-control mechanism was employed to study the optical response of self-affine, deposited colloidal silver films. In the near-field region, NSOM is capable of an optical resolution down to 100 nm which is beyond the traditional diffraction limit of far field optics. Near-field Rayleigh microscopy with simultaneous topographic imaging indicates that the electromagnetic fields on the surface of the self-affine films are localized in regions smaller than the excitation wavelength. The pattern of high-field regions varies greatly with excitation wavelengths and does not correlate with topography. Local spectra of self-affine film showed distinct resonances arising with highly location-dependent frequencies. The most highly resolved of these resonances correspond to individual surface plasmon normal modes. Specific vibrational bands from the SERS spectra of plithalazine adsorbed on self-affine, silver colloid films were mapped over portions of the film surface in the near-field. The near-field Raman intensity maps display patterns of field localization in subwavelength regions. The pattern of field localization varies greatly with scattered wavelength. Observations in the near-field validate recent theories of the optical response of self-affine fractal objects [Phys. Report, 61, 272, 1996].
Download or read book Ensuring Global Food Safety written by Aleksandra Martinovic and published by Academic Press. This book was released on 2022-02-10 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ensuring Global Food Safety: Exploring Global Harmonization, Second Edition, examines the policies and practices of food law which remain top contributors to food waste. This fully revised and updated edition offers a rational and multifaceted approach to the science-based issue of "what is safe for consumption?" and how creating a globally acceptable framework of microbiological, toxicological and nutritional standards can contribute to the alleviation of hunger and food insecurity in the world. Currently, many laws and regulations are so stringent that healthy food is destroyed based on scientifically incorrect information upon which laws and regulations are based. This book illuminates these issues, offering guidelines for moving toward a scientifically sound approach to food safety regulation that can also improve food security without putting consumers at risk. Presents the progress and current status of regulatory harmonization for food standards Provides a science-based foundation for global regulatory consensus Approaches challenges from a risk-benefit approach, also including safety assurance Includes global perspectives from governmental, academic and industry experts
Download or read book Sensors and Command Control Communications and Intelligence C3I Technologies for Homeland Security and Homeland Defense III written by and published by . This book was released on 2004 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Substrate Evaluation And Optimization For Surface Enhanced Raman Spectroscopy Of Bacteria written by and published by . This book was released on 2003 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: The threat of biological agents to soldiers and the civilian community was amply demonstrated in the fall of 2001. The feasibility of using surface-enhanced Raman spectroscopy (SERS) to detect and identify bacteria is being evaluated. In order to use SERS for bacterial detection and identification, it is necessary to determine the most appropriate type of SERS substrate to use. We are examining gold colloids in suspension, immobilized gold colloids, electrochemically roughened gold, periodic particle arrays (PPA), and film over nanosphere substrates (FONS). Briefly, PPA's are prepared by depositing gold or silver in the interstitial spaces in a close-packed array of polystyrene nanospheres, while FONS are prepared by depositing approximately half a nanosphere diameter of gold or silver on top of a closepacked array of polymer nanospheres. We are evaluating each of these substrate types to determine which will have a high affinity for bacteria, whether we need to modify the surface of the substrate to attract bacteria, and the degree to which each type of substrate enhances the Raman scattering from the bacterial targets. At this point, our initial examination of gold colloids immobilized on glass surfaces has yielded mixed results.
Download or read book Surface Enhanced Raman Scattering written by Idrissa Sow and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
