The occurrence of long-chain polyprenols in leaves of plants of Combretaceae family.

The presence of poly-cis-prenols of chain length 20-60 isoprene units or longer in leaves of plants belonging to Combretaceae family was shown to be a common feature in this group of plants. The polyprenols of this type were found in half of the 20 species studied. In most cases the polyprenols occurred in the form of fatty acid esters. Only in one species--Combretum molle, the polyprenols were found in the form of free alcohols. The amount of long-chain polyprenols varied with the plant species; the richest source was C. molle (about 4% of dry mass of leaves). Polyprenol groups characteristic of other systematic families of plants were not found in the Combretaceae studied.

Download Full-text

The occurrence of long chain polyprenols in leaves of plants of Rosaceae family and their isolation by time-extended liquid chromatography

Biochemistry and Cell Biology ◽

10.1139/o92-068 ◽

1992 ◽

Vol 70 (6) ◽

pp. 448-454 ◽

Cited By ~ 9

Author(s):

Ewa Świeżewska ◽

T. Chojnacki ◽

W. J. Jankowski ◽

K. Singh ◽

J. Olsson

Keyword(s):

Liquid Chromatography ◽

Fatty Acid ◽

Large Scale ◽

Fatty Acid Esters ◽

Large Scale Preparation ◽

Scale Preparation ◽

Wet Weight ◽

Rosaceae Family ◽

Acid Esters ◽

Long Chain

The long chain polyprenols composed of 30 and more isoprene units from leaves of plants belonging to the genera Potentilla and Rosa have been described. They occur in the form of fatty acid esters. The composition of polyprenol mixture was species dependent and its content reached ca. 0.5% wet weight. Large scale preparation of individual polyprenols from a natural polyprenol mixture was performed using time-extended liquid chromatography on the hydrophobic gel Lipidex-5000.Key words: long chain polyprenols, Rosaceae.

Download Full-text

SELECTIVITY OF CANDIDA RUGOSA LIPASE IMMOBILIZED ONTO LAYERED DOUBLE HYDROXIDES AS CATALYST IN SYNTHESIS OF FATTY ACID ESTERS

Jurnal Teknologi ◽

10.11113/jt.v78.8647 ◽

2016 ◽

Vol 78 (5-6) ◽

Author(s):

Mohd Basyaruddin Abdul Rahman ◽

Siti Salhah Othman ◽

Noor Mona Md Yunus

Keyword(s):

Fatty Acids ◽

Fatty Acid ◽

Chain Length ◽

Candida Rugosa ◽

Candida Rugosa Lipase ◽

Carbon Chain ◽

Fatty Acid Esters ◽

Carbon Chain Length ◽

Chain Lengths ◽

Acid Esters

The enzymatic selectivity of Lipase from Candida rugosa immobilized onto a calcined layered double hydroxide (CLDHs-CRL) towards the chain-length of fatty acids and alcohols in the synthesis of fatty acid esters was investigated. The results showed that CMAN-CRL catalyzed the esterification process with fatty acids of medium chain lengths (C10-C14) effectively while, CNAN-CRL and CZAN-CRL exhibited high percentage conversion in fatty acids with carbon chain lengths of C8-C12 and C10-C18, respectively. In the alcohol selectivity study, CMAN-CRL showed high selectivity toward alcohols with carbon chain lengths of C4, C6 and C10. On the other hand, both CNAN-CRL and CZAN-CRL exhibited rather low selectivity towards longer carbon chain length of alcohols.

Download Full-text

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

Cosmetics ◽

10.3390/cosmetics6030045 ◽

2019 ◽

Vol 6 (3) ◽

pp. 45 ◽

Cited By ~ 1

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.

Download Full-text