Characterization of a Charge-Coupled Device Photoarray as a Molecular Absorption Spectrophotometric Detector

1979 ◽  
Vol 33 (3) ◽  
pp. 240-245 ◽  
Author(s):  
Kenneth L. Ratzlaff ◽  
Steven L. Paul
Keyword(s):  
Solid State ◽  
Visible Region ◽  
Time Frame ◽  
Integration Time ◽  
Molecular Absorption ◽  
Charge Coupled Device ◽  
Rapid Scan ◽  
A Charge ◽  
Dark Signal

Recently there has been a great deal of interest in the use of solid-state multichannel detectors as sensors for rapid-scan spectroscopy. The charge-coupled device (CCD) photoarray, not previously characterized for this application, is described. The unit has 1728 elements, arranged linearily, which integrate light over the same time frame; the photo signals are then read serially. The CCD was found to produce signals which are linear with both intensity and integration time. The dark signal at −10°C is 0.1% of saturation for a 10 ms integration time, and the noise level is less than 0.08% of saturation. The wavelength response is in the visible region. The application for rapid-scan spectrophotometry is also discussed.

Rapid structural and chemical characterization of ternary phase diagrams using synchrotron radiation

2003 ◽  
Vol 18 (10) ◽  
pp. 2522-2527 ◽  
Author(s):  
E. D. Specht ◽  
A. Rar ◽  
G. M. Pharr ◽  
E. P. George ◽  
P. Zschack ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Chemical Characterization ◽  
Lattice Parameter ◽  
Ternary Alloys ◽  
Charge Coupled Device ◽  
Ternary Phase Diagrams ◽  
Wide Range ◽  
Combinatorial Materials ◽  
A Charge

A technique based on synchrotron radiation was developed that allows for rapid structural and chemical characterization of ternary alloys over a wide range of composition. The technique was applied to isothermal sections of the Cr–Fe–Ni system grown on Al2O3(0001) sapphire substrates by sequential deposition of layers of graded.thickness followed by annealing to interdiffuse the elements. A film spanning the Cr–Fe–Ni ternary system was measured in 4 h at a resolution of 2 at.% by rastering the sample under a focused beam of synchrotron radiation while simultaneously measuring the diffraction pattern with a charge-coupled device detector to determine crystallographic phases, texture, and lattice parameters and also measuring the x-ray fluorescence with an energy-dispersive detector to determine elemental composition. Maps of phase composition and lattice parameter as a function of composition for several annealing treatments were found to be consistent with equilibrium values. The technique will be useful in combinatorial materials design.

Characterization of an x-ray framing camera utilizing a charge coupled device or film as recording media

1998 ◽  
Vol 69 (12) ◽  
pp. 4054-4060 ◽  
Author(s):  
L. M. Logory ◽  
D. R. Farley ◽  
A. D. Conder ◽  
E. A. Belli ◽  
P. M. Bell ◽  
...  
Keyword(s):  
Recording Media ◽  
Charge Coupled Device ◽  
X Ray ◽  
A Charge ◽  
Framing Camera

Characterization of a charge-coupled-device detector in the 1100–014-nm (1-eV to 9-keV) spectral region

1999 ◽  
Vol 38 (1) ◽  
pp. 29 ◽  
Author(s):  
Luca Poletto ◽  
Alessio Boscolo ◽  
Giuseppe Tondello
Keyword(s):  
Spectral Region ◽  
Charge Coupled Device ◽  
A Charge

Photometric Application of the Gram Stain Method To Characterize Natural Bacterial Populations in Aquatic Environments

1998 ◽  
Vol 64 (2) ◽  
pp. 742-747 ◽  
Author(s):  
H. Saida ◽  
N. Ytow ◽  
H. Seki
Keyword(s):  
Wall Structure ◽  
Image Analyzer ◽  
Gram Stain ◽  
Bacterial Populations ◽  
Charge Coupled Device ◽  
Gram Positive Bacteria ◽  
A Charge ◽  
Dichotomous Classification

ABSTRACT The Gram stain method was applied to the photometric characterization of aquatic bacterial populations with a charge-coupled device camera and an image analyzer. Escherichia coli andBacillus subtilis were used as standards of typical gram-negative and gram-positive bacteria, respectively. A mounting agent to obtain clear images of Gram-stained bacteria on Nuclepore membrane filters was developed. The bacterial stainability by the Gram stain was indicated by the Gram stain index (GSI), which was applicable not only to the dichotomous classification of bacteria but also to the characterization of cell wall structure. The GSI spectra of natural bacterial populations in water with various levels of eutrophication showed a distinct profile, suggesting possible staining specificity that indicates the presence of a particular bacterial population in the aquatic environment.

Development and characterization of a charge‐coupled device detection system for ion microscopy

1989 ◽  
Vol 60 (5) ◽  
pp. 886-894 ◽  
Author(s):  
Lisa K. Turner ◽  
David S. Mantus ◽  
Yong‐Chien Ling ◽  
Mark T. Bernius ◽  
George H. Morrison
Keyword(s):  
Detection System ◽  
Charge Coupled Device ◽  
Ion Microscopy ◽  
A Charge

scholarly journals Characterization of a charge-coupled device array for Bragg spectroscopy

2006 ◽  
Vol 77 (4) ◽  
pp. 043107 ◽  
Author(s):  
Paul Indelicato ◽  
Eric-Olivier Le Bigot ◽  
Martino Trassinelli ◽  
Detlev Gotta ◽  
Maik Hennebach ◽  
...  
Keyword(s):  
Charge Coupled Device ◽  
A Charge ◽  
Bragg Spectroscopy

Enrichment and characterization of an anaerobic methyl ethyl ketoxime degrading culture from an anoxic/anaerobic/aerobic activated sludge sequencing batch reactor

1998 ◽  
Vol 37 (4-5) ◽  
pp. 95-98 ◽  
Author(s):  
Nancy G. Love ◽  
Mary E. Rust ◽  
Kathy C. Terlesky
Keyword(s):  
Energy Source ◽  
Activated Sludge ◽  
Electron Acceptor ◽  
Sequencing Batch Reactor ◽  
Enrichment Culture ◽  
Batch Reactor ◽  
Nitrification Inhibitor ◽  
Time Frame ◽  
Methyl Ethyl

An anaerobic enrichment culture was developed from an anoxic/anaerobic/aerobic activated sludge sequencing batch reactor using methyl ethyl ketoxime (MEKO), a potent nitrification inhibitor, as the sole carbon and energy source in the absence of molecular oxygen and nitrate. The enrichment culture was gradually fed decreasing amounts of biogenic organic compounds and increasing concentrations of MEKO over 23 days until the cultures metabolized the oxime as the sole carbon source; the cultures were maintained for an additional 41 days on MEKO alone. Turbidity stabilized at approximately 100 mg/l total suspended solids. Growth on selective media plates confirmed that the microorganisms were utilizing the MEKO as the sole carbon and energy source. The time frame required for growth indicated that the kinetics for MEKO degradation are slow. A batch test indicated that dissolved organic carbon decreased at a rate comparable to MEKO consumption, while sulfate was not consumed. The nature of the electron acceptor in anaerobic MEKO metabolism is unclear, but it is hypothesized that the MEKO is hydrolyzed intracellularly to form methyl ethyl ketone and hydroxylamine which serve as electron donor and electron acceptor, respectively.

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