Download or read book Fluorescent Yield Measurements written by James J. Le Page and published by . This book was released on 1971 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: K-fluorescent yields were measured for the elements Mg (12), Al (13), Cl (17), Sc (21), Fe (26), Zn (30), Se (34), Zr (40), and Sn (50). The values are in good agreement with the values of Bailey and Swedlund for elements 13 through 26. The four high Z measurements smoothly join the values of Bailey and Swedlund to the high Z values of Fink, Mark, Jopson, and Swift. A semi-empirical formula is given that fits the data with an RMS deviation of 1.9 percent. (Author).
Download or read book Standardization and Quality Assurance in Fluorescence Measurements I written by Ute Resch-Genger and published by Springer Science & Business Media. This book was released on 2008-08-06 with total page 499 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analytical chemists and materials scientists will find this a useful addition to their armory. The contributors have sought to highlight the present state of affairs in the validation and quality assurance of fluorescence measurements, as well as the need for future standards. Methods included range from steady-state fluorometry and microfluorometry, microscopy, and micro-array technology, to time-resolved fluorescence and fluorescence depolarization imaging techniques.
Download or read book CALORIMETRIC MEASUREMENT OF FLUORESCENCE YIELD written by and published by . This book was released on 1963 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: A method for measuring fluorescence yield of solutions is described, through which the heating resulting from absorbed light in fluorescing and nonfluorescing solutions is compared. Determination of the yield is based on the fact that for the same absorption in a nonfluorescing solution all the absorbed light energy is converted into beat, and the heating of the fluorescing solutions takes place by means of that portion of the energy of the absorbed light which is not emitted in the form of fluorescence. Results of fluorescence yield measurements are presented for several solutions of dyes. The precision of measurements for substances with yields close to unity is of the order of 5 percent.
Download or read book Fluorescence Yields Measurements written by Eugene Thayer Patronis and published by . This book was released on 1957 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quantitating Fluorescence Intensity from Fluorophore The Definition of MESF Assignment written by and published by DIANE Publishing. This book was released on with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book New Measurements of Fluorescence Yields written by W. Gelletly and published by . This book was released on 1966 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Calorimetric Measurement of Fluorescence Yield written by M. N. Alentsev and published by . This book was released on 1951 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chlorophyll a Fluorescence written by G.C. Papageorgiou and published by Springer Science & Business Media. This book was released on 2007-11-12 with total page 853 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chlorophyll a Fluorescence: A Signature of Photosynthesis highlights chlorophyll (Chl) a fluorescence as a convenient, non-invasive, highly sensitive, rapid and quantitative probe of oxygenic photosynthesis. Thirty-one chapters, authored by 58 international experts, provide a solid foundation of the basic theory, as well as of the application of the rich information contained in the Chl a fluorescence signal as it relates to photosynthesis and plant productivity. Although the primary photochemical reactions of photosynthesis are highly efficient, a small fraction of absorbed photons escapes as Chl fluorescence, and this fraction varies with metabolic state, providing a basis for monitoring quantitatively various processes of photosynthesis. The book explains the mechanisms with which plants defend themselves against environmental stresses (excessive light, extreme temperatures, drought, hyper-osmolarity, heavy metals and UV). It also includes discussion on fluorescence imaging of leaves and cells and the remote sensing of Chl fluorescence from terrestrial, airborne, and satellite bases. The book is intended for use by graduate students, beginning researchers and advanced undergraduates in the areas of integrative plant biology, cellular and molecular biology, plant biology, biochemistry, biophysics, plant physiology, global ecology and agriculture.
Download or read book Measurements of the Fluorescence Light Yield in Electromagnetic Showers written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The two most common methods of determining the energy of an ultra high energy cosmic ray (UHECR) are ground arrays and fluorescence telescopes. Ground array detectors determine energy by sampling the number of shower particles arriving at the surface of the earth. In general, the more particles, the higher the energy. Fluorescence telescopes, on the other hand, determine the energy by measuring the number of ultraviolet photons produced by the electromagnetic shower produced in the atmosphere. The number of photons is related to the number of particles in the shower by the fluorescence yield (measured in photons per meter per charged particle). The Akeno Giant Air Shower Array (AGASA) and the High Resolution Flys Eye (HiRes) are the current world leading ground array and fluorescence detectors, respectively. Recent results from the two experiments indicate a significant discrepancy in the flux of cosmic rays as a function of energy [1-3]. This indicates that there may be a systematic offset in energy determination in the two techniques. The Fluorescence in Air from Showers (FLASH) experiment is an effort to reduce the systematic uncertainty in energy determination for fluorescence detectors by making an improved measurement of the fluorescence yield. This work is intended to add to the prior work of Bunner, Kakimoto et al. and Nagano et al. [4-7]. We report on the current status of the experiment.
Download or read book Measurement of Pressure Dependent Fluorescence Yield of Air written by and published by . This book was released on 2005 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: In a test experiment at the Final Focus Test Beam of the Stanford Linear Accelerator Center, the fluorescence yield of 28.5 GeV electrons in air and nitrogen was measured. The measured photon yields between 300 and 400 nm at 1 atm and 29 C are Y(760 Torr){sup air} = 4.42 ± 0.73 and Y(760 Torr){sup N{sub 2}} = 29.2 ± 4.8 photons per electron per meter. Assuming that the fluorescence yield is proportional to the energy deposition of a charged particle traveling through air, good agreement with measurements at lower particle energies is observed.
Download or read book Measurement of the quantum yield of fluorescence written by Henry Frankel and published by . This book was released on 1959 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Principles of Fluorescence Spectroscopy written by Joseph R. Lakowicz and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 487 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fluorescence methods are being used increasingly in biochemical, medical, and chemical research. This is because of the inherent sensitivity of this technique. and the favorable time scale of the phenomenon of fluorescence. 8 Fluorescence emission occurs about 10- sec (10 nsec) after light absorp tion. During this period of time a wide range of molecular processes can occur, and these can effect the spectral characteristics of the fluorescent compound. This combination of sensitivity and a favorable time scale allows fluorescence methods to be generally useful for studies of proteins and membranes and their interactions with other macromolecules. This book describes the fundamental aspects of fluorescence. and the biochemical applications of this methodology. Each chapter starts with the -theoreticalbasis of each phenomenon of fluorescence, followed by examples which illustrate the use of the phenomenon in the study of biochemical problems. The book contains numerous figures. It is felt that such graphical presentations contribute to pleasurable reading and increased understand ing. Separate chapters are devoted to fluorescence polarization, lifetimes, quenching, energy transfer, solvent effects, and excited state reactions. To enhance the usefulness of this work as a textbook, problems are included which illustrate the concepts described in each chapter. Furthermore, a separate chapter is devoted to the instrumentation used in fluorescence spectroscopy. This chapter will be especially valuable for those perform ing or contemplating fluorescence measurements. Such measurements are easily compromised by failure to consider a number of simple principles.
Download or read book Photosynthesis and the Environment written by N.R. Baker and published by Springer Science & Business Media. This book was released on 1996-11-30 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photosynthesis and the Environment examines how photosynthesis may be influenced by environmental changes. Structural and functional aspects of the photosynthetic apparatus are examined in the context of responses to environmental stimuli; particular attention being given to the processing of light energy by thylakoids, metabolic regulation, gas exchange and source-sink relations. The roles of developmental and genetic responses in determining photosynthetic performance are also considered. The complexity of the responses to environmental change is demonstrated by detailed analyses of the effects of specific environmental variables (light, temperature, water, CO2, ozone and UV-B) on photosynthetic performance. Where appropriate attention is given to recent developments in the techniques used for studying photosynthetic activities. The book is intended for advanced undergraduate and graduate students and a wide range of scientists with research interests in environmental effects on photosynthesis and plant productivity.
Download or read book Standardization and Quality Assurance in Fluorescence Measurements II written by Ute Resch-Genger and published by Springer Science & Business Media. This book was released on 2008-08-15 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analytical chemists and materials scientists will find this a useful addition to their armory. The contributors have sought to highlight the present state of affairs in the validation and quality assurance of fluorescence measurements, as well as the need for future standards. Methods included range from steady-state fluorometry and microfluorometry, microscopy, and micro-array technology, to time-resolved fluorescence and fluorescence depolarization imaging techniques.
Download or read book Determination of the K Fluorescence Yield of Argon by Proportional counter Spectrometry written by Claire Godeau and published by . This book was released on 1961 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Molecular Fluorescence written by Bernard Valeur and published by John Wiley & Sons. This book was released on 2013-03-25 with total page 595 pages. Available in PDF, EPUB and Kindle. Book excerpt: This second edition of the well-established bestseller is completely updated and revised with approximately 30 % additional material, including two new chapters on applications, which has seen the most significant developments. The comprehensive overview written at an introductory level covers fundamental aspects, principles of instrumentation and practical applications, while providing many valuable tips. For photochemists and photophysicists, physical chemists, molecular physicists, biophysicists, biochemists and biologists, lecturers and students of chemistry, physics, and biology.
Download or read book Precise Measurement of the Absolute Fluorescence Yield of the 337 Nm Band in Atmospheric Gases written by and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
