scholarly journals Multidimensional analytical protocols for the fractionation and analysis of complex polyolefins

2021 ◽  
Author(s):  
Harald Pasch ◽  
Anthony Ndiripo ◽  
Paul Severin Eselem Bungu
Keyword(s):  
Analytical Protocols

scholarly journals Solvent-saving approaches for the extraction of siloxanes from pine needles, soils and passive air samplers

2016 ◽  
Vol 8 (27) ◽  
pp. 5378-5387 ◽  
Author(s):  
S. Ramos ◽  
J. A. Silva ◽  
V. Homem ◽  
A. Cincinelli ◽  
L. Santos ◽  
...  
Keyword(s):  
Pine Needles ◽  
Environmental Matrices ◽  
Analytical Protocols

Solvent-saving analytical protocols are a valid alternative to quantify siloxanes in environmental matrices.

scholarly journals Geological Survey of Canada till-sampling and analytical protocols: from field to archive, 2020 update

2020 ◽  
Author(s):  
M B McClenaghan ◽  
W A Spirito ◽  
A Plouffe ◽  
I McMartin ◽  
J E Campbell ◽  
...  
Keyword(s):  
Geological Survey ◽  
Analytical Protocols

Creatine kinase and lactate dehydrogenase: stability of isoenzymes and their activity in stored human plasma and prostatic tissue extracts and effect of sample dilution.

1983 ◽  
Vol 29 (5) ◽  
pp. 832-835 ◽  
Author(s):  
S A Shain ◽  
R W Boesel ◽  
R W Klipper ◽  
C M Lancaster
Keyword(s):  
Creatine Kinase ◽  
Lactate Dehydrogenase ◽  
Human Plasma ◽  
Enzyme Activities ◽  
Prostatic Tissue ◽  
Tissue Extracts ◽  
Sample Dilution ◽  
Analytical Protocols

Abstract We examined the effect of storing human plasma or extracts of prostate at -90 degrees C on the activity of creatine kinase and lactate dehydrogenase and isoenzyme distribution. Enzyme activities were unaltered during storage for as long as six weeks. If these preparations were thawed only once at 2 to 4 degrees C, they could be stored for as long as 165 days at -90 degrees C with no change in isoenzyme distribution. Inexplicably, apparent isoenzyme distribution of prostatic lactate dehydrogenase was sensitive to sample dilution, whereas the isoenzyme distribution of lactate dehydrogenase in plasma was not. Our observations emphasize the importance of validating details of analytical protocols that are to be used for quantification of new types of specimens.

Experimental evaluation of sampling, storage and analytical protocols for measuring arsenic speciation in sulphidic hot spring waters

2017 ◽  
Vol 130 ◽  
pp. 162-167 ◽  
Author(s):  
Katrin Hug ◽  
William A. Maher ◽  
Simon Foster ◽  
Frank Krikowa ◽  
John W. Moreau
Keyword(s):  
Experimental Evaluation ◽  
Hot Spring ◽  
Arsenic Speciation ◽  
Analytical Protocols

scholarly journals Analytical protocols for Phobos regolith samples returned by the Martian Moons eXploration (MMX) mission

2021 ◽  
Vol 73 (1) ◽  
Author(s):  
Wataru Fujiya ◽  
Yoshihiro Furukawa ◽  
Haruna Sugahara ◽  
Mizuho Koike ◽  
Ken-ichi Bajo ◽  
...  
Keyword(s):  
Noble Gas ◽  
Geochemical Data ◽  
Chemical Compositions ◽  
Isotopic Compositions ◽  
Bulk Chemical ◽  
Sample Return Mission ◽  
Crucial Information ◽  
Sampling Systems ◽  
Japan Aerospace Exploration Agency ◽  
Analytical Protocols

AbstractJapan Aerospace Exploration Agency (JAXA) will launch a spacecraft in 2024 for a sample return mission from Phobos (Martian Moons eXploration: MMX). Touchdown operations are planned to be performed twice at different landing sites on the Phobos surface to collect > 10 g of the Phobos surface materials with coring and pneumatic sampling systems on board. The Sample Analysis Working Team (SAWT) of MMX is now designing analytical protocols of the returned Phobos samples to shed light on the origin of the Martian moons as well as the evolution of the Mars–moon system. Observations of petrology and mineralogy, and measurements of bulk chemical compositions and stable isotopic ratios of, e.g., O, Cr, Ti, and Zn can provide crucial information about the origin of Phobos. If Phobos is a captured asteroid composed of primitive chondritic materials, as inferred from its reflectance spectra, geochemical data including the nature of organic matter as well as bulk H and N isotopic compositions characterize the volatile materials in the samples and constrain the type of the captured asteroid. Cosmogenic and solar wind components, most pronounced in noble gas isotopic compositions, can reveal surface processes on Phobos. Long- and short-lived radionuclide chronometry such as 53Mn–53Cr and 87Rb–87Sr systematics can date pivotal events like impacts, thermal metamorphism, and aqueous alteration on Phobos. It should be noted that the Phobos regolith is expected to contain a small amount of materials delivered from Mars, which may be physically and chemically different from any Martian meteorites in our collection and thus are particularly precious. The analysis plan will be designed to detect such Martian materials, if any, from the returned samples dominated by the endogenous Phobos materials in curation procedures at JAXA before they are processed for further analyses.

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