Enzymatic Conversion and Degradation of Sex Pheromones in Antennae of the Male Silkworm Moth Antheraea polyphemus

1988 ◽  
Vol 43 (3-4) ◽  
pp. 275-284 ◽  
Author(s):  
Gerhard Kasang ◽  
Leopold von Proff ◽  
Michael Nicholls
Keyword(s):  
Fatty Acid ◽  
Fatty Alcohol ◽  
Half Life ◽  
Sex Pheromones ◽  
Fatty Alcohols ◽  
Fatty Acid Esters ◽  
Enzymatic Conversion ◽  
Antheraea Polyphemus ◽  
Polar Metabolites ◽  
Acid Esters

In living antennae of the male silkworm moth Antheraea polyphemus the pheromone compounds [6,7-3H]-6,11-hexadecadienyl acetate and [12,13-3H]-10,12-hexadecadienol are enzymatically converted to their corresponding fatty alcohols, aldehydes, acids and long-chained fatty acid esters. In antennae of freshly hatched moths the 3H-labeled pheromones are degraded at high rates to volatile polar metabolites. The half-life of the pheromone acetate is about 3 min. In dried antennae the pheromone acetate is merely hydrolyzed to the fatty alcohol.

scholarly journals Impact of Selected Cosmetic Ingredients on Common Microorganisms of Healthy Human Skin

Cosmetics ◽  
2019 ◽  
Vol 6 (3) ◽  
pp. 45 ◽  
Author(s):  
Dorota Dobler ◽  
Thomas Schmidts ◽  
Sören Wildenhain ◽  
Ilona Seewald ◽  
Michael Merzhäuser ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Human Skin ◽  
Chain Length ◽  
Skin Diseases ◽  
Free Acid ◽  
Fatty Alcohols ◽  
Fatty Acid Esters ◽  
Bacterial Strains ◽  
Acid Esters

Human skin is a complex ecosystem and is host to a large number of microorganisms. When the bacterial ecosystem is balanced and differentiated, skin remains healthy. However, the use of cosmetics can change this balance and promote the appearance of skin diseases. The skin’s microorganisms can utilize some cosmetic components, which either promote their growth, or produce metabolites that influence the skin environment. In this study, we tested the ability of the Malassezia species and some bacterial strains to assimilate substances frequently used in dermal formulations. The growth capability of microorganisms was determined and their lipase activity was analyzed. The growth of all Malassezia spp. in the presence of free acids, free acid esters, and fatty alcohols with a fatty chain length above 12 carbon atoms was observed. No growth was observed in the presence of fatty alcohol ethers, secondary fatty alcohols, paraffin- and silicon-based substances, polymers, polyethylene glycols, quaternary ammonium salts, hydroxy fatty acid esters, or fatty acids and fatty acid esters with a fatty chain length shorter than 12 carbon atoms. The hydrolysis of esters by Malassezia lipases was detected using High Performance Thin Layer Chromatography (HPTLC). The production of free fatty acids as well as fatty alcohols was observed. The growth promotion or inhibition of bacterial strains was only found in the presence of a few ingredients. Based on these results, formulations containing microbiome inert ingredients were developed.

An infrared spectroscopic method for quantitative analysis of fatty alcohols and fatty acid esters in machinery oils

2005 ◽  
Vol 383 (2) ◽  
pp. 305-311 ◽  
Author(s):  
Pekka Vähäoja ◽  
Jani Närhi ◽  
Toivo Kuokkanen ◽  
Outi Naatus ◽  
Jorma Jalonen ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Quantitative Analysis ◽  
Spectroscopic Method ◽  
Fatty Alcohols ◽  
Fatty Acid Esters ◽  
Infrared Spectroscopic ◽  
Acid Esters

Enzymatic Conversion of Sex Pheromones in Olfactory Hairs of the Male Silkworm Moth Antheraea polyphemus

1989 ◽  
Vol 44 (11-12) ◽  
pp. 920-926 ◽  
Author(s):  
Gerhard Kasang ◽  
Michael Nicholls ◽  
Thomas Keil ◽  
Sudha Kanaujia
Keyword(s):  
Sex Pheromone ◽  
Fatty Alcohol ◽  
Sex Pheromones ◽  
Enzymatic Conversion ◽  
Antheraea Polyphemus ◽  
Silk Moth ◽  
Pheromone Compound

Abstract The sex pheromone compound [6,7-3H]-6,ll-hexadecadienyl acetate is enzymatically converted to its corresponding fatty alcohol, aldehyde and acid in living and homogenized olfactory hairs and in other parts of the antennae of the male silk-moth Antheraea polyphemus. The pheromone is metabolized in vitro mainly in the inner hydrophilic compartments, but scarcely in the outer hydrophobic cuticle of the olfactory hairs.

Mixed ruthenium-tin boride catalysts for selective hydrogenation of fatty acid esters to fatty alcohols

1989 ◽  
Vol 28 (7) ◽  
pp. 1110-1112 ◽  
Author(s):  
Chakravarthula S. Narasimhan ◽  
Vinayak M. Deshpande ◽  
Krishnan Ramnarayan
Keyword(s):  
Fatty Acid ◽  
Selective Hydrogenation ◽  
Fatty Alcohols ◽  
Fatty Acid Esters ◽  
Acid Esters

Development of the determination methods of fatty acid esters of chloropropanediols in fat-rich foods

2014 ◽  
Vol 31 (2) ◽  
pp. 95-101
Author(s):  
Xiaobo YAN ◽  
Shaoming WU ◽  
Nan LI ◽  
Huadong LV ◽  
Wusheng FU
Keyword(s):  
Fatty Acid ◽  
Fatty Acid Esters ◽  
Determination Methods ◽  
Acid Esters
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