PubMed Health⌕ Search

PubMed · 8220337

[Basic biochemical blood parameters in astronauts in preflight training].

Abstract

From the findings of biochemical blood analyses obtained during original examinations of 24 cosmonauts with a repeat blood sampling (2-5 times) of each test subject there calculated the mean values of norm and the interval limits of norm using 33 biochemical blood indices for a given group of test subjects. It is shown that in the absence of significant discrepancies from the generally used mean population standards for the cosmonauts it is typical of some specific differences from universally adopted standards of the parameters mainly related to energy metabolism.

Explore related subjects

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

I A Popova, E G Vetrova, L M Kurkina, I V Zabolotskaia, L A Rustamían. [Basic biochemical blood parameters in astronauts in preflight training].. https://pubmed.ncbi.nlm.nih.gov/8220337/

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

Detection of Delta9-tetrahydrocannabinolic acid A in human urine and blood serum by LC-MS/MS.

Delta9-tetrahydrocannabinolic acid A (Delta9-THCA-A) is the precursor of Delta9-tetrahydrocannabinol (Delta9-THC) in hemp plants. During smoking, the non-psychoactive Delta9-THCA-A is converted to Delta9-THC, the main psychoactive component of marihuana and hashish. Although the decarboxylation of Delta9-THCA-A to Delta9-THC was assumed to be complete--which means that no Delta9-THCA-A should be detectable in urine and blood serum of cannabis consumers--we found Delta9-THCA-A in the urine and blood serum samples collected from police controls of drivers suspected for driving under the influence of drugs (DUID). For LC-MS/MS analysis, urine and blood serum samples were prepared by solid-phase extraction. Analysis was performed with a phenylhexyl column using gradient elution with acetonitrile. For detection of Delta9-THCA-A, the mass spectrometer (MS) (SCIEX API 365 triple-quadrupole MS with TurboIonSpray source) was operated in the multiple reaction monitoring (MRM) mode using the following transitions: m/z357 --> 313, m/z357 --> 245 and m/z357 --> 191. Delta9-THCA-A could be detected in the urine and blood serum samples of several cannabis consumers in concentrations of up to 10.8 ng/ml in urine and 14.8 ng/ml in serum. The concentration of Delta9-THCA-A was below the Delta9-THC concentration in most serum samples, resulting in molar ratios of Delta9-THCA-A/Delta9-THC of approximately 5.0-18.6%. Only in one case, where a short elapsed time between the last intake and blood sampling is assumed, the molar ratio was 18.6% in the serum. This indicates differences in elimination kinetics, which need to be investigated in detail.

Blood Chemical Analysis↗