Topic
Terpene
About: Terpene is a research topic. Over the lifetime, 2208 publications have been published within this topic receiving 51480 citations. The topic is also known as: terpenes.
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TL;DR: In this article, the ability of yeast to biosynthesize terpenes and terpene derivatives was investigated in the course of studies about the influence of various yeast species and strains on the formation of fermentation byproducts.
Abstract: In the course of studies about the influence of various yeast species and strains on the formation of fermentation by-products, the ability of yeasts to biosynthesize terpenes and terpene derivatives was investigated. In model fermentations,Saccharomyces rosei, Kloeckera apiculata, Metschnikowia pulcherrima, andTorulopsis stellata formed trace amounts of the terpene hydrocarbonsβ-myrcene and limonene as well as the terpene alcohols linalool,α-terpineol, and farnesol. WithS. cerevisiae, only the formation of traces of farnesol could be established. These results clearly demonstrate that terpene patterns of various grape cultivars used in previous work for varietal classification of white wines are not influenced by yeast fermentation carried out according to modern enological methods.
39 citations
TL;DR: The results showed that terpenes was predominant and its concentration represented over 89.9% of the overall compounds, and alcohols, aldehydes, ketones, esters, acids, and others were typically present in lesser amounts.
Abstract: The aroma-active compounds in Chinese bayberry were identified using gas chromatography-olfactometry (GC-O) and GC-mass spectrometry techniques. The volatile compounds were extracted using Liquid–liquid extraction, solvent-assisted flavor evaporation and headspace solid-phase microextraction (HS-SPME), respectively. On the basis of odor intensity, the most important aroma compounds in Chinese bayberry samples were caryophyllene, menthol, 4-terpineol, linalool oxide, linalool, benzyl alcohol, α-methylbenzyl alcohol, β-phenylethanol, 3-methylbutanoic acid and acetic acid, and so on. Moreover, HS-SPME technique was employed to investigate the aroma compounds among immature and mature waxberry fruits. The results showed that terpenes (for example, β-caryophyllene) was predominant and its concentration represented over 89.9% of the overall compounds, and alcohols, aldehydes, ketones, esters, acids, and others were typically present in lesser amounts. Finally, principal component analysis revealed that there was also significant difference between immature and mature waxberry fruits
39 citations
TL;DR: Biotransformation experiments confirmed the applicability of the novel GTs in biocatalytic processes for the production of these novel compounds, and predicted that terpene glucosides will become commercially available for food, cosmetic, and pharmaceutical industry due to improved biocatsynthetic processes involving GT enzymes.
Abstract: Terpenoids are one of the main classes of natural products. In plants, a large fraction of the terpenoids is present as nonvolatile glycosides. The terpene glycosides have attracted much attention as antimicrobials, flavor precursors, and detergents. They are either extracted from plant materials or are synthesized by chemical and biocatalytic methods. Up to now, biotechnological production of terpene glycosides is based on reversed hydrolysis performed by glycosidases. However, this method suffers from low yields as a matter of principle. Recently, the first uridine diphosphate-glucose:monoterpenol β-d-glucosyltransferase (GT) genes were cloned and characterized from grapevine (Vitis vinifera) and kiwi (Actinidia deliciosa). Heterologous expression in Escherichia coli yielded promiscuous GT enzymes that efficiently glucosylated primary monoterpenols, simple alcohols, and phenols. The GT enzymes differed in substrate preference and activity toward their terpenoid substrates. Biotransformation experiments confirmed the applicability of the novel GTs in biocatalytic processes for the production of these novel compounds. In the near future, terpene glucosides will become commercially available for food, cosmetic, and pharmaceutical industry due to improved biocatalytic processes involving GT enzymes.
39 citations
TL;DR: Synthesis of Furanoid terpenes via an Efficient Palladium-Catalyzed Cyclization of 4,6-Dienols as mentioned in this paper, using a Palladium catalyst.
Abstract: Synthesis of Furanoid Terpenes via an Efficient Palladium-Catalyzed Cyclization of 4,6-Dienols
39 citations
TL;DR: Trans-Verbenol and perillyl alcohol, obtained via biotransformation, produced in vitro effect against tumour cells at lower concentrations than their monoterpene precursors, (R)-(+)-limonene and (−)-α-pinene, and their derivatives expressed diverse activity towards normal and tumours with noticeable enantiomeric differences.
Abstract: Context Biotransformation systems are profitable tools for structural modification of bioactive natural compounds into valuable biologically active terpenoids.Objective This study determines the biological effect of (R)-(+)-limonene and (−)-α-pinene, and their oxygenated derivatives, (a) perillyl alcohol and (S)-(+)- and (R)-(−)-carvone enantiomers and (b) linalool, trans-verbenol and verbenone, respectively, on human colon tumour cells and normal colonic epithelium.Materials and methods Biotransformation procedures and in vitro cell culture tests were used in this work. Cells were incubated for 24 h with terpenes at concentrations of 5–500 μg/mL for NR, MTT, DPPH, and NO assays. IL-6 was determined by ELISA with/without 2 h pre-activation with 10 μg/mL LPS.Results trans-Verbenol and perillyl alcohol, obtained via biotransformation, produced in vitro effect against tumour cells at lower concentrations (IC50 value = 77.8 and 98.8 μg/mL, respectively) than their monoterpene precursors, (R)-(+)-limon...
39 citations