Results 171 to 180 of about 7,435 (217)

Interlaboratory comparison of hydrophone calibrations

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 1988
The results of an interlaboratory comparison of hydrophone calibration techniques in the frequency range 1-10 MHz are reported. Two membrane hydrophones were calculated to six laboratories, and each laboratory determined the end-of-cable loaded sensitivities using their normal calibration methods; these included optical interferometry, planar scanning,
R C, Preston, D R, Bacon, S S, Corbett, G R, Harris, P A, Lewin, J A, McGregor, W R, O'Brien, T L, Szabo   +7 more
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129I interlaboratory comparison

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1997
An interlaboratory comparison exercise for 129I has been organized and conducted. A total of seven laboratories participated in the exercise to either a full or limited extent. In the comparison, a suite of 11 samples was used. This suite of standards contained both synthetic “standard type” materials (i.e., AgI) and environmental materials.
M.L. Roberts, M.W. Caffee, I.D. Proctor
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Interlaboratory Comparison at 10 V DC

IEEE Transactions on Instrumentation and Measurement, 2005
An interlaboratory comparison at 10 V DC has been made among 16 national, industrial, and military standards laboratories in North America. The comparison used a set of four traveling Zener dc reference standards. A pivot laboratory made measurements at the beginning, at the end, and at four other times during the comparison.
Hamilton, C., Kupferman, S., Salazar, M. T., Deaver, D., Wood, B.   +4 more
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Interlaboratory comparison of IDH mutation detection

Journal of Neuro-Oncology, 2013
Isocitrate dehydrogenase (IDH) mutational testing is becoming increasingly important. For this, robust and reliable assays are needed. We tested the variation of results between six laboratories of testing for IDH mutations. Each laboratory received five unstained slides from 31 formalin-fixed paraffin-embedded (FFPE) glioma samples, and followed its ...
van den Bent, Martin, Hartmann, C, Preusser, M, Strobel, T, Dubbink, Erik jan, Kros, J.M., von Deimling, A, Boisselier, B, Sanson, M, Halling, KC, Diefes, KL, Aldape, K, Giannini, C   +12 more
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Interlaboratory Comparison of the Measurement of Retention Curves

Journal of Thermal Envelope and Building Science, 1999
The results of an interlaboratory comparison of the measurement of apparent density, solid density, open porosity and retention curves are presented. Baumberger sandstone and Sander sandstone were used as test materials. Repeatability standard deviation and reproducibility standard deviation for the measurement of apparent density ...
Hansen, Morten Hjorslev, Houvenaghel, G., Janz, M., Krus, M., Strømdahl, K.   +4 more
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Interlaboratory comparison trial on cylindrospermopsin measurement

Analytical Biochemistry, 2004
The hepatotoxin cylindrospermopsin (CYN) is a potent inhibitor of protein synthesis in mammalian cells. It is produced by freshwater cyanobacterial blooms in countries such as Australia, the United States, Israel, Thailand, and Brazil. An interlaboratory comparison was organized as a first step to evaluate the measurement of CYN in lyophilized ...
Andrea, Törökné, Maria, Asztalos, Maria, Bánkiné, Heike, Bickel, Georg, Borbély, Shmuel, Carmeli, Geoffrey A, Codd, Jutta, Fastner, Qiong, Huang, Andrew, Humpage, James S, Metcalf, Erzsebet, Rábai, Assaf, Sukenik, Gyula, Surányi, Gabor, Vasas, Viktor, Weiszfeiler   +15 more
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INTERLABORATORY COMPARISON OF CHOLINESTERASE ASSAY MEASUREMENTS

Environmental Toxicology and Chemistry, 1994
Abstract Twelve wildlife toxicology laboratories participated in an interlaboratory survey of cholinesterase (ChE) assays to determine comparability of absolute ChE values and estimates of ChE inhibition from organophosphorus insecticide-dosed birds and to examine the type and consistency of methods employed by laboratories for the ...
B. Thomas Marden, Jewel K. Bennett, Anne Fairbrother   +2 more
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Interlaboratory comparison of Josephson voltage standards

IEEE Transactions on Instrumentation and Measurement, 2001
An interlaboratory comparison of Josephson Voltage Standards (JVS) has been made among 16 national, industrial; and military standards laboratories in North America and one in Europe. The comparison was made at 10 V using a set of four traveling Zener reference standards.
David Deaver, William B. Miller, Leonard Pardo, Klaus Jaeger, Dennis Plowman, Clark A. Hamilton   +5 more
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Interlaboratory comparison of serum thyroxine analyses

Clinical Biochemistry, 1982
Approximately 300 clinical chemistry laboratories participated in a survey of measurements of the thyroxine (T4) concentration in 13 lyophilized serum specimens prepared by spiking a base serum pool with several different levels of T4. Of 35 commercially available kit methods, 4 kits were used by 30 or more laboratories, and 9 by 10 or more ...
F W, Spierto, W H, Hannon, D M, Fast, K, Bowman, D D, Bayse   +4 more
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Interlaboratory comparison of blood lead determinations

American Industrial Hygiene Association Journal, 1979
Results are presented for an interlaboratory proficiency study of blood lead determinations. Samples were pooled from individuals occupationally exposed to lead. Performance of individual laboratories is compared over a two year period. With increased emphasis in recent years on proficiency studies of this type, agreement between laboratories has been ...
C C, Maher, D M, Roettgers, H J, Conlon
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