Aminos�urenverluste im menschlichen Schwei�

Abstract

1. The comparison of the women taking oral contraceptives with the women not taking oral contraceptives showed no qualitative or significant quantitative differences in the excretion of amino acids in thermal sweat collected from the total body surface. 2. The comparison of the trained women with the untrained women neither revealed qualitative or significant quantitative differences in the excretion of amino acids in thermal sweat collected from the total body surface. 3. As compared to the trained men, untrained men excreted in thermal sweat collected from the total body surface significantly more alanine, arginine, citrulline, cystine, glycine, histidine, isoleucine, leucine, lysine, phenylalanine, serine, threonine, tyrosine, and valine. 4. The sex-specific comparison of the amino acid excretion in sweat showed that men had a significantly increased excretion of cystine, histidine, leucine, and taurine. Proline was detected only in the sweat of women. 5. The quantitative results obtained for the amino acid excretions during 12 min of sauna bathing suggest that persons exposed to hard, physical activity and/or high environmental temperatures have quite equal amino acid losses in sweat and in 24 h urine.

Glycine as a regulator of tryptophan-dependent pigment synthesis in Malassezia furfur

“…The present study is based on the fact that under physiological conditions, several nitrogen sources are present in the skin, while pigment production by M. furfur has hitherto only been observed after administration of tryptophan alone. In the liquid culture model presented here, glycine was chosen as the second amino nitrogen source, representative of hydrophilic amino acids that are found at higher concentrations in sweat in the case of hyperhidrosis, a predisposition factor of PV 17 . Furthermore, the pigment produced could only be qualitatively demonstrated with the previous culture method and had to be detached from the agar.…”

“…In the liquid culture model presented here, glycine was chosen as the second amino nitrogen source, representative of hydrophilic amino acids that are found at higher concentrations in sweat in the case of hyperhidrosis, a predisposition factor of PV. 17 Furthermore, the pigment produced could only be qualitatively demonstrated with the previous culture method and had to be detached from the agar. Therefore, transferring incubation into a liquid nutrient medium does not only consider the real situation on the skin, where the yeast are optimally exposed to nutrients and electrolytes, but also allows quantitative evaluation of the detached pigment by spectral photometric measurement.…”

Determination of Fatty Acids in Human Sweat during Fasting Using GC/MS

“…Advantages for sweat analysis of non-invasive methods include facilitated sample collection and no risk factor for infection; moreover, samples can be collected as many times as needed with much less stress. Various biological substances had already been found in human sweat, 4 such as some inorganic ions, 5-8 amino acids, 9,10 and lactic acids. 8,11,12 FAs, the important compounds in sweat, have also been observed with procedures by collection of sweat 12 and by ingestion of linseed oil.…”