Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 55 for “"Monoterpene"”.
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Monoterpene Metabolism: Aspects of Assimilation and Patterns of Enzyme Induction
Made available in DSpace on 2014-12-05T19:38:05Z (GMT). No. of bitstreams: 1 6303203.pdf: 2801575 bytes, checksum: 4db643636ed33d112565f3cdf7a6fda9 (MD5) Previous issue date: 1962
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A molecular approach to study the monoterpene-induced response in Arabidopsis thaliana
… Arabidopsis plants can respond to exposure to monoterpene volatiles. My experiments using the pinII–promoter GUS reporter system clearly established that Arabidopsis plants respond to the exposure of the monoterpene volatiles tested. It is thought that monoterpenes and other volatiles can act …
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Preliminary characterization of VmTPT2, a putative monoterpene indole alkaloid (MIA) transporter from Vinca minor L. (Apocynaceae)
The various steps of monoterpene indole alkaloid (MIA) biosynthesis are known to occur in specialized cell types and subcellular compartments. Numerous MIAs display powerful biological activities that have led to their use as pharmaceutical treatments for cancer, hypertension and malaria. Many of …
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Understanding the formation of secondary organic aerosol and the fates of organic nitrates formed from monoterpene oxidation
… in radiative forcing, and poor visibility. Monoterpenes represent about 15% of the annual emissions of biogenic volatile organic compounds (VOC), and their oxidation is considered to contribute to global SOA budget substantially. In the presence of NOx, oxidation of monoterpenes also …
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Discovery, characterization, and rational design of the enzymes involved in monoterpene indole alkaloid biosynthesis in Madagascar periwinkle
… roseus, approximately 130 structurally complex monoterpene indole alkaloids are produced, including the clinically used anti-mitotic drugs, vinblastine and vincristine. The common intermediate to all monoterpene indole alkaloids is strictosidine, the product of an asymmetric Pictet- Spengler …
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The γ-tocopherol-like family of N-methyltransferases: A taxonomically clustered gene family encoding enzymes responsible for N-methylation of monoterpene indole alkaloids
… family Apocynaceae accumulates thousands of monoterpene indole alkaloids (MIAs) which originate, biosynthetically, from the common secoiridoid intermediate, strictosidine, that is formed from the condensation of tryptophan and secologanin molecules. MIAs demonstrate remarkable structural …
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Stereochemistry, isotope effects, and inhibition of terpene biosynthesis: I. Stereospecificity and mechanism of monoterpene cyclases. II. Inhibition by heteroatom analogs of carbocation intermediates
Stereospecificity and mechanism of monoterpene cyclases have been investigated by use of deuterium and tritium labeled substrates. The stereochemistry of the terminating deprotonation in limonene biosynthesis was elucidated by radiochemical degradation of ($\sp3$H) carvoximes. Limonene cyclases …
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Local Variation in the Chemical Defence of European Pine Sawfly (Neodiprion sertifer): Effects of Host Tree Chemistry and Social Environment
… effect of host plant quality, specifically the monoterpene concentration of pine needles, on the chemical defence and defensive behaviour of N. sertifer larvae and female oviposition decisions (group size and sex allocation). Additionally, I analysed how the social environment (group size and …
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Crystallization studies of Pictet-Spenglerases
… rich source of medicinally important molecules. Monoterpene indole alkaloids from plants are an especially important source of therapeutic molecules. Due to the complexity of these molecules, biosynthesis of derivatives is an attractive way of obtaining molecules with potentially new or improved …
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Characterisation and fate of bleached kraft mill effluents from a New Zealand pulp and paper mill
… and/or chlorinated derivatives of Pinus radiata monoterpenes. The major compounds were a dichlorobornane and four dichloro-p-menthane-1,8-diols. The chlorinated monoterpenes were detected in total concentrations of 1400-12 300 μg L⁻¹ [70-600 g air-dried tonne⁻¹ (ADT) bleached pulp] and they were …
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Resin Detoxification in Dendroctonus ponderosae: Functional Characterizations of Cytochrome P450 Proteins
… cytochrome P450 enzymes to both detoxify toxic monoterpene compounds present in tree resin as well as synthesize the pheromones used during tree invasion, suggesting an evolutionary link between the P450 proteins involved in the two processes. This study attempts to contribute to the …
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Exploiting alkaloid biosynthesis in Madagascar periwinkle to obtain natural product derivatives and new biocatalysts
… and vincristine from Catharanthus roseus monoterpene indole alkaloid biosynthesis, and camptothecin derivatives from Ophiorrhiza pumila quinoline alkaloid biosynthesis, are anticancer agents currently used in the clinic. Strictosidine synthase is a key enzyme in the biosynthesis of these …
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Calibration, optimization, and deployment of PTR-MS instruments during the AIRMAP project
… to quantify the impact of storm systems on monoterpene mixing ratios in rural New Hampshire. Analysis of five years of monoterpene measurements at Thompson Farm (in Durham, NH) show storm events with intense precipitation correlate with brief periods of enhanced monoterpene mixing ratios. …
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Efeitos cronotropico e inotropico negativos induzidos pelo timol em ratos espontaneamente hipertensos
Thymol is a monoterpene present in the constitution of the essential oils of many plants and is well known for its broad spectrum antimicrobial activity and is also reported in the literature their activities on the cardiovascular system . Therefore , this study aimed to evaluate the chronotropic …
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Understanding and manipulating alkaloid biosynthesis
… and transport of these molecules. For example, monoterpene indole alkaloid (MIA) biosynthesis, a set of metabolic pathways that produces hundreds of bioactive natural products, has not been fully elucidated in any organism. Here we examine the biosynthesis of secologanin, which contributes the …
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Pharmacological Investigation with Anethole in an Experimental Model of Obesity // Фармакологични проучвания с анетол в експериментален модел на затлъстяване
… and summarise the pharmacological activity of monoterpene anethole administered orally in increasing doses to rats in a model of obesity induced by a high-calorie diet. For this purpose, 50 male Wistar rats, divided into 5 groups, consumed a high-calorie diet and were treated with three …
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Semi-Synthesis of Melodinine, Taberyunine, and Melosuavine Bis-Indole Alkaloids Through Chemical and Biological Methods
… of (-)-melodinine K was completed from the monoterpene indole alkaloid (-)-tabersonine through regioselective enzymatic hydroxylation and Polonovski-Potier coupling. Regioselective borylation strategies were used to achieve meta-oxygenated derivatives of (-)-tabersonine for analysis in a …
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Effect of canopy manipulation and fermentation on grape aroma components
… for its ability to absorb and desorb five monoterpene alcohols, three monoterpene hydrocarbons, four monterpene oxides, two aromatic alcohols and a glucopyranoside from White Riesling juice at two different pH values. The percent recovery and the coefficients of variation for each compound …
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DEVELOPING MOLECULAR TOOLS TO IMPROVE TERPENOIDS PRODUCTION IN RHODOSPORIDIUM TORULODIES
… mutants that were able to grow at high levels of monoterpene, menthol. Two such mutants, RtDPR1 and Rt0S08, were successfully identified, which helps remediating the cytotoxicity issue during terpenoid production and we expect these mutants will be able to significantly enhance terpenoid …
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Using GPS, GIS & remote sensing to understand Niagara Terroir
… vigor, yield, fruit maturity as well as berry monoterpene concentration; it could also clearly assist in making wines that are more representative ofthe cultivar used, and also wines that are a reflection of a specific terroir, since calculated vegetation indices were highly correlated to …
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