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 63 for “"terpene"”.
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The Origins of Terpene Infochemicals in Insects: Identification and Evolutionary Analysis of Terpene Synthases in Diverse Lineages
… abundant class of specialized metabolites are terpenes, which are released by many members of taxonomically diverse insect lineages as pheromone and defense compounds. Despite the broad occurrence of terpenes in insects, knowledge of their biosynthesis remains limited compared to that in other …
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A New Method for the Synthesis of the Terpene Precursors for the Terpene Portion of Δ-1-Tetrahydrocannabinol (THC).
Marijuana and hashish have been under focus in recent years by governmental, social, and scientific groups. This attention has triggered the study of chemistry of cannabis sativa, cannabis indica, and other types of plants thought to contain cannabinoid. material. These studies have led to many new …
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Structure and function of the terpene biosynthesis enzyme, IspH
… in different environments. In addition, another terpene biosyntheis enzyme, MenA, and two other metalloenzymes that are drug targets, DHAD and LOX, were also investigated. Overall, this research is of interest since it revealed the structure and functions of the terpene biosynthesis enzyme IspH …
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Head-to-head terpene synthases: Mechanism of action and inhibition
“Head-to-head” terpene synthases catalyze the first committed steps in sterol and carotenoid biosynthesis: the condensation of two isoprenoid diphosphates to form cyclopropylcarbinyl diphosphates, followed by ring opening. In this work, I used x-ray crystallography, and mutagenesis to study the …
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Biochemical and Functional Characterization of Induced Terpene Formation in Arabidopsis Roots
… biosynthesis and function of volatile terpenes in the model plant Arabidopsis. When infected with the root rot pathogen Pythium irregulare, Arabidopsis roots release the acyclic C11-homoterpene (E)-4,8-dimethylnona-1,3,7-triene (DMNT), which is a common constituent of volatile blends …
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Biochemical, Molecular and Functional Analysis of Volatile Terpene Formation in Arabidopsis Roots
… root-specific formation and function of volatile terpenes in the model plant Arabidopsis. As one objective, we have characterized the two root-specific terpene synthases, TPS22 and TPS25. Both enzymes catalyze the formation of several volatile sesquiterpenes with (E)-β-farnesene as the major …
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Synthetic studies on terpene natural products.Total synthesis of (-)-Platencin (-)-Dehydrohoplatencin and (+)-Integroc Acid
Contains fulltext : 92397.pdf (Publisher’s version ) (Open Access)
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Investigations into the molecular evolution of plant terpene, alkaloid, and urushiol biosynthetic enzymes
… meta-analyses of a well-characterized sesquiterpene synthase family encoding two closely-related but different types of enzymes, using quantitative measures of natural selection on amino-acid positions previously demonstrated as important for neofunctionalization between two terpene synthase …
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Cell-type specificity and herbivore-induced responses of primary and terpene secondary metabolism in Arabidopsis roots
… the cell-type-specific biosynthesis of volatile terpenes in Arabidopsis roots. Terpenes are the most abundant specialized metabolites in plants and play an important role in plant defense against pathogens or herbivores. Terpene biosynthetic enzyme activities are often coordinated in specific …
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Identification, Characterization, and Functional Analysis of Terpenoid Specialized Metabolism in Switchgrass (Panicum virgatum) and Carrot (Daucus carota)
… I investigated the metabolism and function of terpenes, the largest class of specialized metabolites, in switchgrass and carrot. Switchgrass (Panicum virgatum L.), a perennial C4 grass of the Tallgrass Prairie, represents an important species in natural and anthropogenic grasslands of North …
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Molecular and Functional Characterization of Terpene Chemical Defense in Arabidopsis Roots in Interaction with the Herbivore Bradysia spp. (fungus gnat)
… we have characterized a root-specific terpene synthase AtTPS08, which is responsible for the constitutive formation of the novel volatile diterpene compound, rhizathalene, in Arabidopsis roots. Rhizathalene synthase is a class I diterpene synthase that has high affinity for the …
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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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Identification and Functional Characterization of Sesquiterpene Pheromone Biosynthetic Genes in Stink Bugs (Pentatomidae)
… provide evidence that Pentatomidae produce sesquiterpene aggregation pheromones de novo and discuss the evolution of terpene biosynthesis in stink bugs. According to transcriptome analyses, the investigated stink bug species express at least two isoprenyl diphosphate synthases (IDSs), one of which …
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The effect of viticultural and oenological treatments on fruit and wine composition of Chardonnay musqué /
… TA, pH, and in free and potentially volatile terpene concentrations. Greatest variations in sensory attributes were created however through use of different viticultural practices.Study II: Effect ofcluster thinning timing A two year study was conducted investigating the effect of cluster …
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A molecular analysis of the population structure, mating system and demography of Eucalyptus
… compounds implicated in plant defence, notably terpenes. In Chapter 1, I explored the genetic structure in Eucalyptus globulus to understand how processes such as gene flow and genetic drift have shaped the genetic distribution of the species. Using microsatellite-derived genotypes of …
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