Journal ArticleDOI
Antioxidant activity of lipid-soluble phenolic diterpenes from rosemary
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TLDR
A high-performance liquid chromatography method for analyzing the phenolic diterpenes present in rosemary (Rosmarinus officinalis L.) and commercial rosemary extracts is reported in this article.Abstract:
A high-performance liquid chromatography method for analyzing the phenolic diterpenes present in rosemary (Rosmarinus officinalis L.) and commercial rosemary extracts is reported. Carnosic acid was the major phenolic diterpene present in rosemary leaves, with lesser amounts of 12-methoxycarnosic acid and carnosol. Several commercial rosemary extracts also were analyzed by this method, and in addition to these three compounds other phenolic diterpenes, such as 7-methoxyrosmanol, 7-methoxy-epirosmanol, and rosmanol, were found in some samples. These latter three compounds seem to be artifacts, produced from carnosic acid by oxidation and cyclization. The major phenolic diterpenes were isolated, and their relative antioxidatn activities in soybean oil were measured by the Rancimat. The potency of carnosic acid was more than twice that of any other compound. The antioxidant activity of pure carnosic acid was compared to butylated hydroxytoluene (BHT), butylated hydroxyanisole (BHA), and tertiary butylhydroquinone (TBHQ) and was several times greater than BHT and BHA but less than TBHQ. Nuclear magnetic resonance data for several of the compounds that were incompletely characterized in previous literature are reported.read more
Citations
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Individual and Combined Use of Rosemary and Origanum in Soybean Oil as Natural Antioxidants
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Effect of pelletization on supercritical CO2 extraction of rosemary antioxidants
TL;DR: In this article, the effect of pelletization on the SuperCritical (SC) carbon dioxide (CO2) extraction yield of rosemary antioxidant fractions enriched in phenolic compounds was studied.
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Seasonal Changes in the Plant Growth-Inhibitory Effects of Rosemary Leaves on Lettuce Seedlings
Kwame Sarpong Appiah,Richard Ansong Omari,Siaw Onwona-Agyeman,Christiana Adukwei Amoatey,John Ofosu-Anim,Abderrazak Smaoui,Abdelkarim Ben Arfa,Yoko Suzuki,Yosei Oikawa,Shin Okazaki,Keisuke Katsura,Hiroko Isoda,Kiyokazu Kawada,Yoshiharu Fujii +13 more
TL;DR: In this paper , the effects of seasonal variation (2011-2012) on the carnosic acid concentration and phytotoxicity of rosemary leaves from two locations in Tunisia (Fahs and Matmata) were investigated.
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An Investigation on the Supplementation of Rosemary Volatile Oil to the Laying Quail Diets
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References
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Journal ArticleDOI
Antioxidant and pro-oxidant properties of active rosemary constituents: carnosol and carnosic acid
TL;DR: Both carnosol and carnosic acid stimulated DNA damage in the bleomycin assay but they scavenged hydroxyl radicals in the deoxyribose assay.
Journal ArticleDOI
Antioxidant Constituents in Sage (Salvia officinalis)
TL;DR: The antioxidant compounds of oleoresin of sage (Salvia officinalis) were separated by column chromatography and high-performance liquid chromatography as discussed by the authors, and the major compounds were identified by IR, MS, and 1 H NMR spectrometry as carnosol, carnosic acid, rosmadial, rosmanol, epirosmanol and methyl carnosate.
MonographDOI
The Maillard reaction in foods and nutrition
TL;DR: In this article, the authors present a review of the sensory properties of almost 450 Maillard reaction products, with an emphasis on mutagen production and food technology aspects, with emphasis on lysine losses.
Journal ArticleDOI
Effects of rosemary extracts and major constituents on lipid oxidation and soybean lipoxygenase activity
TL;DR: In this article, a reverse-phase high-performance liquid chromatography system was used to quantitate the content of carnosol, carnosic acid and ursolic acid in the rosemary extracts.