... molecules, Molecular energy levels, Ultraviolet spectra, Spectrum analysis, Laboratory equipment, Ultraviolet spectrometers, Experimental design ...
DTIC Science & Technology
... germicidal uv radiation is used in industry for ... Descriptors : *ULTRAVIOLET RADIATION, *LABORATORY EQUIPMENT, *RADIATION EFFECTS ...
... Title : AN ACCURATE LABORATORY TEST SYSTEM USING COMMERCIAL EQUIPMENT FOR EDDY CURRENT MEASUREMENTS. ...
... Title : MEASUREMENT AND IDENTIFICATION OF LABORATORY- PRODUCED VACUUM ULTRAVIOLET SPECTRAL LINES. ...
The goal of this research program is development of a method for obtaining daily, radiometrically accurate, solar spectral irradiance data at extreme-ultraviolet (EUV) wavelengths. In-orbit radiometric instrumentation recalibration is a fundamental requirement for such measurements. The authors proposed to investigate, design, and test smaller and less ...
Energy Citations Database
Spectrophotometers used for spectral measurements of the solar ultraviolet radiation need to be well characterised to provide accurate and reliable data. Since the characterisation and calibration are usually performed in the laboratory under conditions very different from those encountered during solar measurements, it is essential to ...
PubMed
... M6 IRRADIANCE MCNITOR (AESSIM)PEG12 WH Pakinon0 ... daily, radio- metrically accurate, solar spectral irradiance data at extreme-ultraviolet ...
... The present test gives accurate simulation of the radiant heat effects of natural sunshine. The ultraviolet effects simulate natural sun- shine in a ...
Accurate knowledge of the electron impact excitation cross sections is particularly significant for a proper interpretation of the combined ultraviolet ...
NASA Website
... The goal of this research program is development of a method for obtaining daily, radio- metrically accurate, solar spectral irradiance data at ...
Cosmological investigations, using high-redshift quasi-stellar object (QSO) absorption spectra, of possible variations of the fine-structure constant (?) require very accurate laboratory wavelengths for a number of resonance transitions from several different species. A change in ? could be detected as a shift in the wavelengths of atomic transitions in ...
NASA Astrophysics Data System (ADS)
A new Thomson scattering diagnostic has been implemented on the Omega Laser facility at the Laboratory for Laser Energetics, University of Rochester [J.M. Soures, et al., Laser and Particle Beams 11, 317 (1993)] to measure the electron feature in the ultraviolet wavelength range 200 nm - 263 nm. A pair of imaging spectrometers and streak cameras collect ...
A solar photocatalytic process has been under development at both Sandia National Laboratories and the National Renewable Energy Laboratory (formerly the Solar Energy Research Institute). This process uses solar ultraviolet light to activate a titanium dioxide catalyst which oxidizes organic contaminants in water. In the summer of ...
Jan 11, 2006... by the Galaxy Evolution Explorer's far ultraviolet detector (blue); ... X- rays and ultraviolet radiation are superimposed in the image. ...
Aug 3, 2011 ... Astronomers have found unexpected rings and arcs of ultraviolet light around a selection of galaxies,. Ultraviolet Ring Around th. ...
A simple compact electron impact laboratory source of UV radiation has been developed and is used to
NASA Technical Reports Server (NTRS)
... ultraviolet spectrometer/extreme ultraviolet explorer; ... energetic particle detector, plasma investigation, plasma wave subsystem, dust-detection ...
Jan 22, 2011 ... extreme ultraviolet region cool stars Einstein EXOSAT ROSAT Extreme Ultraviolet Explorer � Previous page � Next page ...
Laboratory testing was conducted in order to assess the long-term atomic oxygen and vacuum ultraviolet radiation durability of the thermal control coating ...
May 31, 2011 ... Laboratory testing was conducted in order to assess the long-term atomic oxygen and vacuum ultraviolet radiation durability of the thermal ...
Accurate ultraviolet photoabsorption cross sections of polyatomic molecules are essential tools for reliable modeling of the photochemistry of planetary atmospheres. Extensive experimental data already have been recorded and published, but they are of uneven spectral resolution and coverage, and in many cases, are unavailable in computer-readable forms ...
Sediment toxicity identification and evaluation (TIE) methods are relatively simple laboratory methods designed to identify specific toxicants or classes of toxicants in sediments; however, the question of whether the same toxicant identified in the laboratory is causing effects in the field remains unanswered. The objective of our study was to determine ...
This volume of the LLE Review, covering the period April-June 1987, contains a summary of the recent high-density campaign on the OMEGA laser system; a report on the absorption and radiation of energy from spherically irradiated targets; and a computer model describing the source of hot spots in the OMEGA laser. The section on advanced technology has reports on a method for ...
To establish trends in surface ultraviolet radiation levels, accurate and stable long-term measurements are required. The accuracy level of today's measurements has become high enough to notice even smaller effects that influence instrument sensitivity. Laboratory measurements of the sensitivity of the entrance optics have shown a ...
The synchrotron-based reflectometer at beamline 6.3.2 of the Advanced Light Source (ALS) in Berkeley is an important metrology tool within the current Extreme Ultraviolet Lithography (EUVL) program. This program is a joint activity of three National Laboratories and a consortium of leading semiconductor manufacturers. Its goal is the development of a ...
Quantifying the response of phytoplankton photosynthesis to ultraviolet radiation: Biological, inhibition, primary production, UV-A, UV-B. ABSTRACT The sensitivity of photosynthesis to ultraviolet functions for UV inhibition of photosynthesis (BWFs) were determined in the laboratory using polychromatic
E-print Network
Laboratory and field experiments have shown that ultraviolet light may be as effective a treatment for microbial control in injection waters as many biocides. In many cases, the use of ultraviolet light is less expensive. The ultraviolet unit must be properly designed and constructed, and the effectiveness of the ...
The effects of ultraviolet radiation on zooplankton was studied. Newly hatched shrimp larvae were exposed to white light and to ultraviolet light in the laboratory. After 12 days, 74 percent of the larvae exposed to only white light were still alive; fewer than 18 percent of those exposed to ultraviolet light ...
Accurate solar extreme ultraviolet (EUV) spectral irradiance data are needed for research in solar, ionospheric/thermospheric, and planetary physics, as well as for space weather forecasts and spacecraft operations and tracking. Because of instrument perf...
National Technical Information Service (NTIS)
An International Astronomical Union Meeting, Ultraviolet and X-ray Spectroscopy of Astrophysical and Laboratory Plasmas, was held on the Belfield Campus of the Univ. of Dublin, Ireland, from 30 August through 1 September 1982. Over 80 scientists from 13 c...
This volume represents the Proceedings of the Eighth International Colloquium on Ultraviolet and X-Ray Spectroscopy of Astrophysical and Laboratory Plasmas. The aim of this series of colloquia has been to bring together workers in the fields of astrophysi...
... the earliest changes possible in cataract formation. ... Descriptors : *INFRARED RADIATION, *CATARACTS, LABORATORY TESTS, ULTRAVIOLET ...
Technicians at the Johns Hopkins University Applied Physics Laboratory in Laurel , Maryland, install the Alice ultraviolet imaging spectrometer on NASA's New ...
Mar 8, 2006 ... Technicians at the Johns Hopkins University Applied Physics Laboratory in Laurel , Maryland, install the Alice ultraviolet imaging ...
lead to inaccuracies in interpreting the results of ground laboratory tests of Teflon materials in terms of expected degradation in the space environment. ...
... Studies were performed both with commercial ultraviolet light systems designed for water sterilization and with a continuous flow laboratory system. ...
... UVR source than to simulate accurately the solar radiation spectrum. The need ... measurement by the detection 2 system. This has implications for AS/NZS ... ...
NBII National Biological Information Infrastructure
most accurate reference for the solar cycle minimum as part of the international ... 200 nm) has been measured daily by the Solar Extreme. Ultraviolet (EUV) ...
... and agencies for Research Development Test and ... Title : Test Plan For Laboratory Bench Scale Study ... The field study was limited with respect to ...
... While our laboratory predominantly uses a spectrophotometric method for the determination of carboxyhemoglobin (COHb), we consider it ...
The extreme-ultraviolet spectra (5 to 55 nm) for foil-excited molybdenum ions have been measured using 22 to 200 MeV beams from the Brookhaven National Laboratory MP tandem Van de Graaff accelerator facility, 20 ..mu..g/cm/sup 2/ C stripping foils, and a grazing incidence spectrometer. The mean ion charge states (13 to 28) and the narrow distribution ...
This report summarizes research progress in accelerator-based studies of atomic structure and decay characteristics of excited states in multiply charged ions. This work involves spectroscopic measurements in visible to extreme ultraviolet wavelength regions of atomic transitions involving Rydberg states and low-lying excited states in multiply charged ions. These ...
The mid-infrared spectrum of the rather circular planetary nebula NGC 2792 taken with the Spitzer Space Telescope is presented. This spectrum is combined with the ultraviolet IUE spectrum and with the spectrum in the visual wavelength region to obtain a complete, extinction corrected, spectrum. The chemical composition of the nebula is then calculated in two ways. First by ...
Accurately calibrating space plasma instruments is challenging and requires a precise, controllable source for the energy range and species of interest. For electrons, radioactive beta sources can be used, though their characteristics have inherent limitations for measuring the angular and energy response of particle counting instruments. We report the development of a ...
The Interstellar Medium Absorption Gradient Experiment Rocket (IMAGER) will probe the correlation between ultraviolet dust extinction, and the metallicity and radiation environment in M101. With four 400�-wide bandpasses, IMAGER targets UV extinction features and will utilize M101 as a laboratory for studying dust in HII regions. M101 is nearly face-on, ...
... accurate and replicable from a competent laboratory: pH value � chemistry grade pH paper accurate to ±0.05 or calibrated equipment; ...
Center for Food Safety and Applied Nutrition (CFSAN)
The Galaxy Evolution Explorer was launched on April 28, 2003. ... atmosphere, causing sunburn, the Galaxy Evolution Explorer observes those ultraviolet ... galaxies are represented as white circles on the right, or "today" side of the timeline. ...
In this activity students test the effects of exposure to ultraviolet (uv) radiation on living cells by simulating the ozone hole in the laboratory. They will shine a source of ultraviolet radiation on living cells such as a plant or yeast and record how the cells change over time. Students consider how this information might apply to ...
NSDL National Science Digital Library
The USDA UV-B (Ultraviolet-B) Radiation Monitoring Program at Colorado State University National Resource Ecology Laboratory via WWW ...
A special study of the optical hazards associated with the operation of five different types of laboratory ultraviolet sources in the Toxicology Division of the US Army Environmental Hygiene Agency was performed. (Author) (GRA)
The National Ignition Facility (NIF), currently under construction at the Lawrence Livermore National Laboratory, is a stadium-sized facility containing a 192-beam, 1 .8 Megajoule, 500-Terawatt, ultraviolet laser system together with a 10-meter diameter t...
The present investigations were undertaken to determine the fate of Kelthane residues intentionally applied to apples under controlled laboratory conditions and the reduction of these residues in the pomace by exposure to drying in the dark, in sunlight, and ultraviolet light irradiation. (auth)
Changes in solar ultraviolet (UV) radiation have been proposed as a possible factor contributing to seeming increases in hindlimb malformations in anuran amphibians in North America. A primary purpose of this study was to reproduce results from an earlier experiment in which Ran...
EPA Science Inventory
The acute and chronic toxicity of fluoranthene was determined for a diverse group of freshwater and saltwater species under both standard laboratory fluorescent light and ultraviolet (UV) light test conditions. Acute tests with 21 species demonstrated that fluoranthene was not le...
Different studies have demonstrated that solar ultraviolet (UV) radiation can adversely affect survival and development of embryonic and larval amphibians. However, because of among-laboratory variations in exposure profiles (artificial vs. natural sunlight; natural sunlight at d...
Experiments were conducted at the Natural Energy Laboratory of Hawaii to determine the effectiveness of non-chemical techniques to control biofouling. The two techniques investigated were ultrasonic and ultraviolet. The colonization of microorganisms attr...
A low-pressure hydrogen discharge lamp was calibrated for radiant intensity in the vacuum ultraviolet spectral region on an absolute basis and was employed as a laboratory standard source in spectrograph calibrations. This calibration was accomplished thr...
There is an inverse relationship between surface brightness and polarization in the wavelength range from the ultraviolet to the near infrared. This relationship was first observed by the French astronomers B. Lyot and A. Dollfus in the early 20th century for planetary surfaces and laboratory models. The relationship was later confirmed principally by Egan ...
Atomic structure codes have a difficult time accurately calculating the wavelengths of many-electron ions without the benefit of laboratory measurements. This is especially true for wavelengths of lines in the extreme ultraviolet and soft x-ray regions. We are using the low-energy capability of the Livermore electron beam ion traps to ...
DOE Information Bridge
Atomic structure codes have a difficult time accurately calculating the wavelengths of many-electron ions without the benefit of laboratory measurements. This is especially true for wavelengths of lines in the extreme ultraviolet and soft X-ray regions. We are using the low-energy capability of the Livermore electron beam ion traps to ...
The forbidden singlet-triplet transitions of carbon monoxide (CO) are important in the interpretation of vacuum ultraviolet interstellar absorption spectra and in particular for the measurement of large CO column densities. Twenty rovibronic lines of the e {sup 3}{Sigma}-({nu}' = 5) - X {sup 1}{Sigma}{sup +}({nu}'' = 0) band of {sup 12} C {sup 16}O ...
The two greenhouses, N2O and O3 are currently thought to be quite independent, excepting that O(1D) from O3 photodissociation in the Hartley -Huggins band destroys N2O. A meta-analysis of the most recent and highly accurate laboratory determinations of the N2O quantum yields in UV (266 nm) photolysis of O3/O2/N2 mixtures (at 100 torr ? pressure ? 900 ...
We report preliminary measurements of Fe III spectra in the 1150 to 2500 � wavelength interval. Spectra have been recorded with an iron-neon Penning discharge lamp (PDL) between 1600 and 2500� at Imperial College (IC) using high resolution Fourier (FT) transform spectroscopy. These FT spectrometer measurements were extended beyond 1600� to 1150� using high-resolution grating spectroscopy ...
This volume represents the Proceedings of the Eighth International Colloquium on Ultraviolet and X-Ray Spectroscopy of Astrophysical and Laboratory Plasmas. The aim of this series of colloquia has been to bring together workers in the fields of astrophysical spectroscopy, laboratory spectroscopy and atomic physics in order to exchange ...
The JPL instrument uses an excimer laser and generates ultraviolet light at two wavelengths absorbed differentially by ozone. Some of this light is ...
Apr 3, 2009 ... This ultraviolet image from NASA's Galaxy Evolution Explorer shows NGC 3242, a planetary nebula frequently referred to as 'Jupiter's Ghost.
Aug 15, 2007 ... New ultraviolet images from NASA's Galaxy Evolution Explorer shows a speeding ... This anaglyph view of 'Shark' was produced by NASA's Mars ...
Dec 5, 2006... up and radiates light, including ultraviolet light, before disappearing forever into the black hole. ... Added July 21, 2011. Rate this: ...
Ground laboratory evaluation of the candidate aluminized Teflon ...... Using Integrating Spheres, Annual Book of ASTM Standards, Vol. ...
The polycyclic aromatic hydrocarbon (PAH) naphthalene was exposed to ultraviolet ... demonstrate that the UV photolysis of H2O-naphthalene ices results in a ...
... Helium Neon Laser Source Experiment Dimensions ... from a laser source than from a laboratory lamp. ... The design to be used in this experiment is a ...
2522. Handle-shaped Prominence. NASA's Extreme Ultraviolet Imaging Telescope aboard ESA's SOHO spacecraft took this image of a huge, handle-shaped ...
Where Galactic Snakes Live. New ultraviolet images from NASA's Galaxy Evolution Explorer shows a speeding star that is leaving an ...
Apr 21, 2003 ... Ultraviolet light has longer wavelengths and less energy. As we continue across the electromagnetic spectrum through visible light, infrared ...
radiation show the faint vibrations in matter and light ...... Ultraviolet and visible laboratory atomic spectroscopy supports observations that test ...
... obtain a more enriched mixture of sulfur dioxide (Matheson 10% mixture in ... from Optronics Laboratories was chosen to replace the deuterium lamp. ...
Apr 15, 2010... observations around one of the space telescope's two ultraviolet detectors. Read more � Big Babies in the Rosette Nebula. April 12, 2010 ...
Dec 21, 2004 ... Since young stars pack most of their light into ultraviolet wavelengths, young galaxies appear to the spacecraft like diamonds in a field of ...
... Pagination or Media Count : 57. Abstract : Contents: X-ray and ultraviolet measurements during the eclipse of Oct. 12, 1958; II. ...
of the interacting binary systems D Cephei and Algol. The ultraviolet spectra show mass flow within and out of these binary systems. ...
Nov 5, 2009 ... They discovered that an ice sample containing pyrimidine exposed to ultraviolet radiation under space-like conditions produces this ...
The photocatalytic detoxification of organic contaminants is currently being investigated by a number of laboratories, universities, and institutions throughout the world. The photocatalytic oxidation process requires that contaminants come in contact wit...
Science instruments: Wide- and narrow-angle cameras with digital tape recorder, infrared spectrometer and radiometer, ultraviolet spectrometer, ...
Mar 13, 2002... 2002 CHURNING WHIRLPOOL STARS IN ULTRAVIOLET JUPITER MOVIE A dark patch of hydrocarbon haze, wider than Earth, develops and swirls in a ...
This presentation summarizes work addressing the potential for ecological risk stemming from the interactive toxicity of PAHs and ultraviolet radiation as in sunlight....
We present laboratory studies testing the stability of amino acids against ultraviolet ... Two biological and two nonbiological amino acids have been irradiated in ...
Since young stars pack most of their light into ultraviolet wavelengths, young galaxies appear to the spacecraft like diamonds in a field of stones. ...
Hazards to eyes in the chemistry laboratory include exposure to chemicals from vapors and splashed liquids, impact from broken glass and other solids in the event of an explosion, and exposure to ultraviolet lamps.
The Student Nitric Oxide Explorer (SNOE) Database K D Mankoff, C A Barth, S M Bailey* Laboratory of nitric oxide density in the thermosphere made with an ultraviolet spectrometer (UVS) and observations
We have the ability to perform both ultraviolet (UV) photolysis (primarily ... the effects of photolysis and irradiation on an ice. We have ...
... electronic circuits for advanced high temperature infrared and ultraviolet fire detectors which had been developed by the laboratory. A circuit which ...
The objective of this program is to quantify, by laboratory experiments, the charging of ices and other insulators subject to irradiation with electrons, ions and ultraviolet photons and to model special conditions based on the data. The system and condit...
Detailed laboratory astrophysics measurements are, in progress to produce spectral tables for the Fe
Biomass Compositional Analysis Laboratory Providing detailed and accurate characterization of the chemical composition of biomass feedstocks, intermediates, and products NREL is a...
National Renewable Energy Laboratory (NREL)
The falls were preceded by an appearance of a cloud and detonations, frightening local residents. This is an eye witness account that provided accurate ...
Since the time of the pharaohs in ancient Egypt, the water levels of the Nile were accurately measured. These are now a unique resource for climatologists. ...
PARCS will make even more accurate atomic time available to everyone, ... PARCS is being developed by the Jet Propulsion Laboratory with principal ...
... of laboratory methods (or scientific regulatory information ... procedures, that the reported methods or techniques are ... and accurate for use as a regulatory method. ...
... instrument calibrations are usually obtained by usag a very accurate laboratory barometer. The altitude scales on these barometers are based on ...
At Sandia National Laboratories in Albuquerque, NM, accurate and precise data are essential for managing our environment programs. Because we seek high credibility of laboratory data, a study was conducted to determine the management of measurement accuracy and precision by commercial laboratories. This article ...
This project further developed in-line spectroscopic measurements for molten polymer systems. There are two main focuses: development of an online technique for the determination of concentration of ultraviolet stabilizers and antioxidant additives in polypropylene at orders of magnitude higher than those previously studied, and the development of a practical on-line color ...
Scheduled for launch in summer 2011, the Interstellar Medium Absorption Gradient Experiment Rocket (IMAGER) will probe the correlation between ultraviolet dust extinction, and the metallicity and radiation environment in M101. IMAGER simultaneously images M101 in four 400�-wide bandpasses, targeting UV extinction features. We present technical results from telescope and ...
A diode-laser-based sensor has been developed for ultraviolet absorption measurements of the nitric oxide (NO) molecule. The sensor is based on the sum-frequency mixing (SFM) of the output of a tunable, 395-nm external-cavity diode laser and a 532-nm diode-pumped, frequency-doubled Nd:YAG laser in a beta-barium borate crystal. The SFM process generates 325 +/- 75 nW of ...
Ultraviolet Light (254 nm) is a U.S. Food and Drug Administration approved nonthermal intervention technology that can be used for decontamination of food and food contact surfaces. Ultraviolet light is a green technology that leaves no chemical residues. Results from our laboratory indicate that ex...
Technology Transfer Automated Retrieval System (TEKTRAN)
The influence of ultraviolet light on the Coulomb coupling between dust particles was experimentally investigated in Radio-Frequency (RF, 13.56MHz) inductively coupled plasma. Flask shape dust cloud and the filamentary structure of dust particles were observed by adopting two turn ring far from the RF antenna. The ultraviolet radiation seemed to be not ...
Accurate excitation parameters are required to interpret the ultraviolet and X-ray spectra of Fe13+. In this work, we use the AUTOSTRUCTURE code to describe the atomic structure of Fe13+. The 197 lowest-lying fine-structure levels of the 3sx 3py 3dz (x + y + z = 3), 3s 24l, and 3s3p4{s, p, and d} configurations are included along with further correlation ...
Two methods for the determination of photolysis rates of ozone are considered. The conventional method using the chemical actionometer does not produce accurate and continuous measurement results. A photoelectric detector, simpler and cheaper, with interf...
... Organizations such as CIE or American Society for Testing and Materials (ASTM) currently use this technique to produce accurate ... www.cie.co.at/cie/). American Society for Testing and Materials (ASTM) 2...
NASA has recently completed a shuttle-borne stellar ultraviolet astronomy mission known as Astro-1. A three axis instrument pointing system (IPS) was employed to accurately point the science instruments. In order to analyze the pointing control system and...
The design, construction, testing, calibration, flight performance and flight data of an Ebert ultraviolet spectrometer are described which is an accurate representation of the conceptual design of the Apollo 17 UV spectrometer. The instrument was flown i...
This is Radian Corporation's Quality Assurance Project Plan for determining carbamates in ground water by high performance liquid chromatography with an ultraviolet detector. The analytical results will be used to establish an accurate database.
Within a truncated determinant algorithm, two alternatives are discussed for including systematically the remaining ultraviolet modes. Evidence is presented that these modes are accurately described by an effective action involving only small Wilson loops...
Within a truncated determinant algorithm, two alternatives are discussed for including systematically the remaining ultraviolet modes. Evidence is presented that these modes are accurately described by an effective action involving only small Wilson loops.
A modified spindle stage refractometer is described for measuring the refractive indices of transparent materials. Determinations are made on small, single crystal fragments 50 mu m in size and yield accurate data on the principal refractive indices over ...
Using precisely controlled laboratory conditions we have begun to establish a spectral catalogue of the intermediate ionization states of iron, Fe IX - Fe XXIV, in the extreme ultraviolet. The measurements are being performed in support of the development of reliable modeling codes for the analysis of data from the Extreme Ultraviolet ...
This review examines the possibilities for biological research using the three ultraviolet free-electron lasers that are nearing operational status in the US. The projected operating characteristics of major interest in biological research of the free-electron lasers at Brookhaven National Laboratory, the Thomas Jefferson National Accelerator Facility, and ...
We can now produce intense, coherent light at wavelengths where no conventional lasers exist. The recent successes of devices known as free-electron lasers mark a striking confluence of two conceptual developments that themselves are only a few decades old. The first of these, the laser, is a product of the fifties and sixties whose essential characteristics have made it a staple resource in ...
A solar photocatalytic process has been under development at both Sandia National Laboratories and the National Renewable Energy Laboratory (formerly the Solar Energy Research Institute). This process uses solar ultraviolet light to activate a titanium di...
The LURE laboratory (Laboratory for Utilization of Electromagnetic Radiation) presents here a project for a new machine able to produce synchrotron radiation. It will be able to produce ultraviolet radiation, X-ray of middle energy, coupled with free elec...
The electronic spectra of fullerene structures in high frequency discharge are studied in the plasma chemistry laboratory of the Faculty of Science of Masaryk University in Brno. The ultraviolet and visual spectra are investigated in order to be compared ...
The report describes the results of a series of laboratory experiments to evaluate the potential for synergistic disinfectant action when coupling ultraviolet (UV) radiation and chlorine treatment of wastewater and determine if use of the combined agents ...
This study was performed to investigate the effect of combining a freeze cycle, an ultraviolet/condensation cycle (QUV), and a salt-fog plus pollutant/dry cycle (Prohension) in an accelerated laboratory weathering test on the performance of coating system...
A rapid and accurate method for the direct simultaneous determination of nitrate and nitrite is proposed. The method is applied to the determination of nitrate and nitrite in rainwater and wastewater without preliminary separation. The determinations are performed by a CPA matrix method with ultraviolet spectrophotometric detection. The results obtained ...
A series of experiments is summarized concerned with the development of an accurate method of dosimetry for measuring dosages encountered when radiation effects are carried out at high levels, i.e., 10/sup 10/ to l0/sup 12/ ergs/g(C). The method utilizes the radiation-induced ultraviolet absorption in methyl methacrylate for correlation with total ...
Classical photoelasticity makes use of birefringence measured with visible radiations. The paper gives some properties of stress-birefringence in the near ultra-violet. This technique permits more accurate measures of chromatic dispersion, because it incr...
A normal incidence multimirror telescope, the X-ray Ultraviolet Imager, for high resolution imaging of the solar atmosphere in the soft X-ray/XUV region, is being developed as part of the scientific payload of the NASA Orbiting Solar Laboratory. The X-ray...
The performance characteristics of a silicon photodiode (type AXUV100) were determined using the beamline X24C at the National Synchrotron Light Source. The diode sensitivity was measured in the temperature range of -92 deg. C to +41 deg. C and in the wavelength region of 3.0 nm to 88.2 nm. This work is important for understanding variations of the diode sensitivity in environments that are colder ...
A wafer positioning system was recently developed by Sandia National Laboratories for an Extreme Ultraviolet Lithography (EUVL) research tool. The system, which utilizes a magnetically levitated fine stage to provide ultra-precise positioning in all six degrees of freedom, incorporates technological improvements resulting from four years of prototype ...
The extreme ultraviolet EUV emission produced by particle excitation of the hydrogen atmospheres of Jupiter and Saturn is examined using model calculations to determine the nature of the energy deposition process and the effect of such processes on atmospheric structure. Tasks ranging from examination of phenomenologically related processes on Saturn and Titan to analysis of ...
This report documents the results of a Laboratory Directed Research and Development (LDRD) program to explore how best to utilize Sandia`s defense-related sensing expertise to meet the Department of Energy`s (DOE) ever-growing needs for environmental monitoring. In particular, we focused on two pressing DOE environmental needs: (1) reducing the uncertainties in global warming ...
Charlotte Moore Sitterly was a scientist in an era when it was rare for a woman to have the opportunity to devote her life to forefront science. Following her graduation from Swarthmore College in 1920, she accepted a position at Princeton University as an assistant to Henry Norris Russell. In 1925 she started a study of the solar spectrum. She could then not know that she would devote much of her ...
Models and spectra of sunspots were studied, because they are important to energy balance and variability discussions. Sunspot observations in the ultraviolet region 140 to 168 nn were obtained by the NRL High Resolution Telescope and Spectrograph. Extensive photometric observations of sunspot umbrae and prenumbrae in 10 chanels covering the wavelength region 387 to 3800 nm ...
This article describes new advanced research equipment for fast ultraweak luminescence analysis, which can detect at high sensitivity photons after ultraviolet A laser irradiation in biological probes as well as plant, animal, and human cells. The design and construction of this equipment, developed at the Southern National Laboratory of the National ...
The quantification of the HIV integrase inhibitor raltegravir in blood plasma is described using solid phase extraction (SPE) coupled with an accurate high-performance liquid chromatography assay with ultraviolet (UV) detection. The method was validated over the range of 20-10,000 ng/mL using simple sample preparation and chromatography. The SPE method was ...
