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.

Reduction of aldehydes and terpenes within pine wood by microbial activity

Abstract: Aldehydes and terpenes are the most frequently emitted volatile organic compounds (VOCs) in the wood-processing industry. These emissions are classified as injurious to health and hazardous to the environment. To address this problem, the growth conditions have been identified under which bacteria extensively degrade both aldehydes and particularly terpenes in pine wood particles as a raw material for the production of particle boards. In this study, the focus was on pentanal and hexanal (aldehydes) as well as α- and β-pinene (terpenes). Bacterial strains were selected for their ability to metabolize α-pinene as single carbon source in liquid culture medium. α-Pinene degradation was then determined by gas chromatography (GC) analysis. Strains belonging to the genus Pseudomonas showed the best results (98% degradation after 72 h). Comparably good results were also achieved with the thermophilic strain Bacillus pallidus (90% degradation) at 55°C. Furthermore, an adapted mixed culture of Pseudomonas species was inoculated onto wood particles and incubated at room temperature for 3 days. Solid-phase microextraction (SPME) measurements of emitted volatiles and subsequent gas chromatography-mass spectrometry (GC-MS) analysis indicated a complete removal (100%) of aldehydes and, even more importantly, α- and β-pinene. Pre-treatment of unsterile pine wood particles with Pseudomonas species may have potential for industrial application.

Effects of Ammonium Concentration on the Yield, Mineral Content and Active Terpene Components of Chrysanthemum Coronarium L. in a Hydroponic System

Abstract: Chrysanthemum coronarium L. is one of the most important medicinal plants cultivated in East Asia. The objective of this study was to determine the effect of ammonium ion on the yield and effective components of the plant grown in a deep floating technique (DFT) system under greenhouse conditions. Our results indicated that growth characteristics and the dry weight of leaves of C. coronarium L. decreased significantly with increasing ammonium concentration in nutrient solution. The maximum flowerhead yield was achieved in 1.8 mM of ammonium. Contents of sesquiterpene lactones were increased by increasing ammonium concentration, but yields were decreased by ammonium treatment. Maximum yields of sesquiterpene lactones were achieved in 3.1 mM ammonium concentration (r=0.976***). A highly negative correlation (r=-0.804***) was observed between sesquiterpene lactone contents and nitrogen content in the flower part. Essential oil yields decreased with increasing ammonium treatment and a high correlation was observed (r=0.865, p<0.001) between essential oil content and nitrogen content in leaves. terpenes are synthesized from acetyl CoA via the chlorophyll. It also reacts as a cofactor for the mevalonic aicd pathway and are derived from the union of chloroplast ribosome (A 70S), which is responsible 5-carbon elements that have the branched carbon for the biosynthesis of large subunits of ribulose- skeleton of isoprene . The consumption of herbal 1, 5-bisphosphate (RuBP) carboxylase and enzymes that (2) medicine is continuously increasing throughout the world participate in CO fixation . The calcium content in the and many active components have been isolated from plant tissue of basil has a higher correlation with the herbs. The leaves of Chrysanthemum coronarium L. are essential oil terpene concentration than with nitrogen rich in minerals, and the flowerheads have a strong content . Soil application of only phosphate and aromatic odor due to the presence of essential oils, nitrogen plus phosphate fertilizer has reduced the primarily monoterpenoid and sequiterpenoid concentrations of terpenoid lactones in Ginkgo compounds . Bioactive terpenes, such a s seedling . Nitrogen limiting conditions increase volatile (3)

Separation Of Ginkgolides And Bilobalide From G. Biloba

Abstract: The subject invention provides a method for separating a terpene trilactone from Ginkgo biloba plant material or from an extract of Ginkgo biloba comprising a mixture of terpene trilactones, the process comprising the steps of: a) subjecting the Ginkgo biloba plant material or the extract to column chromatography with an appropriate solvent system to produce at least a first fraction containing the terpene trilactone bilobalide, a second fraction eluted after the first fraction containing the terpene trilactones GA and GB, and a third fraction eluted after the second fraction containing at least a preponderance of the terpene trilactones GC and GJ; and b) alkylating the terpene trilactone GB of the second fraction so as to produce a first mixture including terpene trilactone GA and alkylated terpene trilactone GB; or alkylating the terpene trilactone GC of the third fraction so as produce a second mixture including terpene trilactone GJ and alkylated terpene trilactone GC, so as to thereby isolate a terpene trilactone.

Epoxidation of Terpenes

Abstract: Terpene epoxides are considered as potential primary intermediates in the synthesis of numerous green polymers including epoxy resins, polycarbonates, nonisocyanate polyurethanes and even some polyamides. In this chapter we describe recent efforts from our group to develop catalytic and noncatalytic processes for terpene epoxidation using a variety of oxidizing agents and process intensification methods. Most experimental tests deal with limonene epoxidation with applicability to some other terpenes also demonstrated.