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 40 for “"monoterpenes"”.
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The enzymatic release of glycosidically-bound terpenes in must
… there exists glycosidically-bound forms of these monoterpenes, representing a latent source of aroma. This project is a study on the ability of different enzymes to release these monoterpenes in Muscat d'Alexandrie and Weisser Riesling grapes. Different commercial enzyme preparations were …
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Perillyl alcohol and perillic acid enhanced the sensitivity of head and neck cancer cells to radiation treatment in vitro
… and perillyl alcohol are the naturally occurring monoterpenes found commonly in plant fruits and vegetables. Perillyl alcohol (POH) elicited anticarcinogenic effects in a number of cancer models and pharmacokinetic studies in humans revealed that perillic acid (PA) is the major circulating …
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The terpenes of Virginia pine (<u>Pinus virginiana mill</u>.), with investigations of their attractancy to the southern pine beetle (<u>Dendroctonus frontalis</u> zimm.)
… to qualitatively and quantitatively analyze the monoterpenes of Virginia pine. The instrument was adjusted for optimum performance prior to sample analysis. Two packed columns with stationary phases of different polarity, Carbowax 20M and polyphenyl ether + Igepal + Versamid-9JO, were used …
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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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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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Stereochemistry, isotope effects, and inhibition of terpene biosynthesis: I. Stereospecificity and mechanism of monoterpene cyclases. II. Inhibition by heteroatom analogs of carbocation intermediates
… branching between limonene and the bicyclic monoterpenes.
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Volatile organic compounds in the New England troposphere: Atmospheric chemistry and measurement techniques
… measurements related to sampling and analysis of monoterpenes, including fragmentation of the monoterpenes and some of their primary carbonyl oxidation products in the PTR-MS drift tube. The analysis supported only minor interferences from the investigated fragmentation sources, suggesting that …
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Modeling secondary organic aerosol formation from biogenic hydrocarbons
… SOA formation for this domain was dominated by monoterpenes. CMAQ with CACM and MPMPO predicted similar SOA formation when compared to CMAQ with the CB-IV gas-phase mechanism and the SORGAM SOA module. However, responses of SOA predictions at Thompson Farm, New Hampshire to domain NO, emissions …
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A molecular approach to study the monoterpene-induced response in Arabidopsis thaliana
… monoterpene volatiles tested. It is thought that monoterpenes and other volatiles can act as airborne signals between plants under stress or between distant parts of the same plant. At the outset of my thesis research, and to some extent still today, the concept of plant-plant signalling with …
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Characterization of perillyl alcohol as a cell migration-inhibiting compound
… we investigated plant-derived compounds called monoterpenes, known chemopreventive/chemotherapeutic agents, for non-cytotoxic, migration-inhibiting properties in MCF-10A normal and MDA-MB 435 cancerous breast cells. Perillyl alcohol at 0.5 mM inhibited normal breast cell migration while it …
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Nematicidal, antimicrobial and acaricidal activity of plant secondary metabolites
… and its fractions containing necrodane-type monoterpenes against larval stage of Hyalomma lusitanicum and Rhipicephalus sanguineus.
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The application of novel mass spectrometric techniques for the analysis of volatile organic compounds in different environments
… functional group, and as many alkenes (primarily monoterpenes and sesquiterpenes) have been shown to play a significant role in tritrophic signalling it was hypothesised that ozone may disrupt this signalling. This thesis investigates the effect of ozone on tritrophic signalling using a Brassica …
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Investigations of Bicyclo(3.1.1)heptane Terpenes in Higher Plants: Stereochemistry of Pinene Biosynthesis and Isolation of Bergamoten-12-Oic Acids
… geranyl pyrophosphate (GPP) to the bicyclic monoterpenes (+)-$\alpha$-pinene (cyclase I) and ($-$)-$\alpha$-pinene and ($-$)-$\beta$-pinene (cyclase II). The stereochemical course of these cyclizations at the gem dimethyl position of the pinene products was investigated. (6E)- (8-$\sp3$H) GPP …
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Secondary organic aerosol formation of relevance to the marine boundary layer
… hydrocarbons in this study are three monoterpenes (alpha-pinene, beta-pinene, and d-limonene) and two aromatics (m-xylene and toluene), respectively. Results indicate that the oxidation of these monoterpenes and aromatics generates significant amounts of aerosol. The SOA yields of …
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The role of terpenes as protectors of the potato crop
… EU legislation changes have reduced its usage. Monoterpenes may provide an alternative natural solution to sprouting inhibition. S-Carvone has been shown to suppress sprouting in potato varieties, and importantly, has no effect on processing quality of potatoes. Cyclodextrins have been studied …
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Extractable organics and colour in a bleached kraft mill effluent land application system and recipient ground waters
… for treating major effluent organics, including monoterpenes, fatty acids, resin acids, chlorophenolics, and colour, and (2) the effects of the system on organic contamination of sediments, aquifer materials, and ground waters. The study was carried out in four parts, investigating: (i) the …
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GENETIC STRUCTURE OF PINUS STROBUS L BASED ON FOLIAR ISOZYMES FROM 27 PROVENANCES
… among isozymes and concentrations of monoterpenes were relatively weaker.</p><p>Some possible applications of current study to tree improvement were discussed.</p>
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Volatile organic compound fluxes and mixing ratios in two contrasting atmospheric environments : London and the Amazon rainforest
… underestimated. Measurements of isoprene and monoterpenes at the remote ZF2 site in the Amazon rainforest showed an 11-month average total emission rate of 2.7 mg m-2 h-1 with considerable seasonal variation, which could not be accurately reproduced using the light and temperature based MEGAN …
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Bioavailability of Bioactive Compounds
… Results suggests that though esters and monoterpenes make up the two most abundant functional groups in the blackberry essence profile, higher transport rates and recovery were observed in aldehydes. </p>
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A chemical investigation of some New Zealand honeys
… mono- and dibasic acids, aromatic substances, monoterpenes and degraded carotenoid-like extractives. Compounds reported for the first time in honey include 2,6-dimethyl-6(8)-hydroxy-2-trans-2, 7-octadienoic acid, 3 ,5 ,5-trimethylcyclohex-2-en-1-one, 3 ,5 ,5-trimethylcyclohex-2-ene-1,4- dione, …
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