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Maslinic Acid (maslinic + acid)
Selected AbstractsReactivity of Chiral Sesquiterpene Synthons Obtained by the Degradation of Maslinic Acid from Olive-Pressing Residues.CHEMINFORM, Issue 11 2007Andres Garcia-Granados Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source] Triumfettamide and Triumfettoside Ic, Two Ceramides and Other Secondary Metabolites from the Stems of Wild Triumfetta cordifoliaA.HELVETICA CHIMICA ACTA, Issue 7 2008Rich. (Tiliaceae) Abstract Two new ceramides, triumfettamide (1) and triumfettoside Ic (2), characterized as (2R,6Z)-2-hydroxy- N -[(2S,3S,4R)-1,3,4-trihydroxyhexacosan-2-yl]heptadec-6-enamide and (2R)- N -{(1S,2R,3E,6Z, 9Z,12Z,15Z)-1-[(, - D -glucopyranosyloxy)methyl]-2-hydroxyheneicosa-3,6,9,12,15-pentaen-1-yl}-2-hydroxytetradecanamide, respectively, were isolated from the stems of Triumfetta cordifoliaA. Rich. besides eight known secondary metabolites identified as heptadecanoic acid, , -sitosterol glucopyranoside, friedelin, lupeol, betulin, maslinic acid, 2-hydroxyoleanolic acid and the mixture of stigmasterol and , -sitosterol. Their structures were determined on the basis of spectroscopic methods as well as HR-MALDI-FT-ICR-MS analysis, chemical transformation, and by comparison of their physical and spectral data with those reported in the literature and with authentic specimens for some known compounds. Five pentacyclic triterpenoids, friedelin, lupeol, betulin, maslinic acid, and 2-hydroxyoleanolic acid, have been isolated from Triumfetta genus for the first time. [source] Dietary intake of probiotics and maslinic acid in juvenile dentex (Dentex dentex L.): effects on growth performance, survival and liver proteolytic activitiesAQUACULTURE NUTRITION, Issue 4 2006M.C. HIDALGO Abstract Two feeding trials were carried out to evaluate the efficiency of probiotics and maslinic acid, on growth and survival of juvenile dentex; liver proteolytic activities were also investigated in the second trial. For experiment 1, triplicate groups were fed six diets with two probiotics (Bacillus toyoi, T, and B. cereus, E) at increasing levels (0.5, 1 and 2 g kg,1 diet) and a control diet. Growth and feed conversion were not significantly influenced by the probiotics. The diet T1 produced the lower mortality, whereas diet E1 rendered the higher mortality. It was concluded that no significant effects on growth and survival were found following the addition of two kinds of probiotics to dentex diets. However, the diet E0.5 showed a tendency to ameliorate the growth and feed utilization of the diet. In a second trial, triplicate groups were fed four diets with increasing levels of maslinic acid (0, 20, 40 and 80 mg kg,1 diet). Growth of fish given diets with the highest level of maslinic acid (D80) was slightly but not significantly lower than those from the other groups. Furthemore, mortality of fish fed diet D40 was the lowest. Changes in liver proteasome and endoprotease activities measured on sodium dodecyl sulphate (SDS)/gelatin gels were also detected in a dose-dependent manner. It was concluded that a dietary maslinic acid at a level of 80 mg kg,1 diet seems to be too high for juvenile dentex to maintain a maximal growth and survival rate. [source] Enrichment of pomace olive oil in triterpenic acids during storage of "Alpeorujo" olive pasteEUROPEAN JOURNAL OF LIPID SCIENCE AND TECHNOLOGY, Issue 12 2008Aranzazu García Abstract Triterpenic acids are natural compounds present in plants and foods with beneficial properties for human health and thus they are desirable in the food, cosmetics and pharmaceutical industries. Pomace olive is considered a good source of these substances. In this study, oleanolic and maslinic acids were found to be the main triterpenic acids identified in pomace olive oil obtained from stored "Alpeorujo". Determination of the two acids was achieved by a new procedure that consists of extracting the acids from the oil with a mixture of methanol/ethanol, and then separating and quantifying them by HPLC. Results showed that their concentration increased up to 16,g/kg of oil during storage of the pomace in large ponds for 7,months. The concentration of both triterpenic acids was similar in the pomace olive oil obtained by using the centrifugation system. By contrast, a much lower concentration of maslinic than oleanolic acid was detected in pomace olive oils obtained by solvent extraction from the previously centrifugated "Alpeorujo" paste. These triterpenic acids also contributed to the acidity of the crude oil. Likewise, the oil of the pomace paste was enriched in other substances such as 4-ethylphenol and aliphatic alcohols during the storage of the paste in large ponds. Consequently, crude pomace olive oil can be considered a good source of triterpenic acids when obtained from a stored olive paste. [source] | ||||||||||