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At least 883 records · Page 49Linked to original sources
PubMed1976

Crystalloid configuration in the adrenal cortex of the Siamese tree shrew (Tupaia glis).

Crystalloids of what appear to be smooth reticulum have been observed in the zona fasciculata and zona reticularis in both the stressed and nonstressed adrenal gland of the Siamese tree shrew (Tupaia glis). No crystalloids are observed in the zona glomerulosa. Similar crystalloids have been described in other steroid-secreting organs, including the antebrachial organ of the lemur (Lemur catta), the parotoid gland of Bufo alvarius and in sebaceous gland cells of the Galagos and Macaques. Moreover, the crystalloids in the present investigation resemble the paracrystalline arrays of smooth reticulum present in the adrenal cortex of the fetal guinea pig. The crystalloids show much variation in degree of organization, sometimes appearing as wavy tubules parallel with one another or as fused tubules having a "donut" configuration. In addition, the crystalloids are nearly identical to configurations which have been described in mitochondrial cristae of the protozoan, Pelomyxa carolinensis.

Adrenal Cortex↗
PubMed1996

Possible role of volcanic ash-gas clouds in the Earth's prebiotic chemistry.

Volcanic ash-gas clouds represent versatile local atmospheric environments appropriate for abiotic synthesis of rather complex organic molecules due to the simultaneous presence of various gaseous reagents, catalytically active inorganic particles, electric discharges, pressure and temperature gradients. They are relatively readily attainable for the scientists, contrary to objects or events of space origin (interstellar and planetary dust, meteoritic/cometary impacts, etc.), providing excellent opportunities for in situ studies and grounded simulating experiments. This paper reviews the available data on this environment, its most important chemical and physical parameters. Based on this analysis, it is suggested in brief experimental conditions for the simulation.

Atmospheric Pressure↗
PubMed1984

[The effect of electricity on the myoglobin content of the human heart and skeletal muscles].

The myoglobin content of heart muscles was examined by the indirect immunoperoxidase method in eight autopsy cases where death was due to electricity. Seven cases showed a considerable release of myoglobin from the myocardial fibers. In experimental comparison, the heart muscles and skeletal muscles from nine cases where death was natural were exposed to electricity, and considerable deletion of myoglobin was also demonstrated. We believe that the findings of ischemia or thermal effects due to electricity were the cause of the release of myoglobin. Because the demonstration of myoglobin is preferable to estimation of the damaged areas of muscles by hematoxylin-eosin staining, this examination may be more advantageous in forensic examination of death by electricity.

Adult↗
PubMed2004

Thunderstorm asthma.

Thunderstorms have often been linked to epidemics of asthma, especially during the grass flowering season; however, the precise mechanisms explaining this phenomenon are unknown. Evidence of high respirable allergen loadings in the air associated with specific meteorologic events combined with an analysis of pollen physiology suggests that rupture of airborne pollen can occur. Strong downdrafts and dry, cold outflows distinguish thunderstorm rain from frontal rain. The weather system of a mature thunderstorm likely entrains grass pollen into the cloud base, where pollen rupture would be enhanced, then transports the respirable-sized fragments of pollen debris to ground level where outflows distribute them ahead of the rain. The conditions occurring at the onset of a thunderstorm might expose susceptible people to a rapid increase in concentrations of pollen allergens in the air that can readily deposit in the lower airways and initiate asthmatic reactions.

Allergens↗