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Showing 1 to 20 of 279 for “"volatiles"”.
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Volatiles in Icelandic subglacial rhyolite
Magmatic volatiles from subglacial edifices offer useful insights into palaeo-ice thicknesses and during subaerial eruptions are a strong influence on eruptive behaviour. However, pre-eruptive volatile concentrations and degassing paths are lacking from subglacially erupted edifices and thus the …
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New fatty acids, oxylipins and volatiles in microalgae
Ziel der vorliegenden Arbeit war die Charakterisierung der Fettsäureprofile verschiedener Mikroalgen, um potentielle Kandidaten für industrielle Anwendungen zu finden. Dabei wurden alle zur Verfügung stehenden Algenstämme der Sammlung von Algenkulturen in Göttingen (SAG) untersucht. Der Fokus lag …
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Investigating the Distribution and Source(s) of Lunar Volatiles
… and likely source(s) of light element volatiles (C, N, He, Ne, and Ar) in a diverse suite of lunar mare basalts and soils, providing new insights about volatiles indigenous to the lunar interior, volatiles produced <i>in situ</i> at the lunar surface, and volatiles delivered to and …
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The characterization of volatiles associated with young stellar objects
… of this work, we searched for differences in volatiles within a single star forming region, Rho Ophiuchi. We determined the amount, temperature, and composition of two ice features, the bending modes of CO₂ and H₂O at 15 µm and 6 µm, respectively, toward 28 Young Stellar Objects (YSOs). We …
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Magmatic volatiles at rifts and arcs: Sources and fractionation effects
… Melts generated in the mantle carry dissolved volatiles from depth and upon decompression exsolve a fluid or vapour phase. These volatiles drive explosive eruptions, change climate, and form economic metal deposits. Thus, the sources and processes involved in degassing of the mantle and melts …
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Volatiles as a link between planetary interiors and the environment
Volatiles derived from planetary interiors influence magma evolution and environmental processes. Over appropriate timescales, Earth's mantle, crust, ocean, and atmosphere constitute coupled systems. The apparently synchronous Siberian Traps eruption and end-Permian mass extinction offer an ideal …
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Fumigation with Muscodor albus volatiles for the control of postharvest decay
… endophytic fungus that produces antimicrobials volatiles, in controlling postharvest diseases of fruits and vegetables by biological fumigation. In vitro test was conducted using bipartite Petri dishes with PDA medium, in which M. albus was previously grown for six days in one of the …
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Implications of Martian polar insolation levels on the climatic cycling of volatiles
Solar insolation at the poles is the driving force in Mars' seasonal climatic cycle. Mars' obliquity has varied greatly in the geologically recent past and this would have had a profound effect on the past climate. Previous studies have always assumed a spherical planet when calculating insolation. …
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Effects of Capture and Return on Chardonnay (Vitis vinifera L.) Fermentation Volatiles
… system for the partial retention of fermentation volatiles, as a means of improving white wine quality, was evaluated. Twenty-three aroma-active volatiles including ethyl esters, acetate esters, fusel alcohols, and fatty acids, were quantified using head-space solid phase microextraction with …
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The History of Water and Other Associated Volatiles in Howardite-Eucrite-Diogenite Meteorites
Recent <i>in situ</i> measurements of volatiles (H<sub>2</sub>O, Cl and F), particularly in lunar and martian samples, have changed our understanding of the volatile inventory of the inner Solar System. Whilst this has provided a wealth of data for these planetary bodies, currently little is known …
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Olfactory responses of Dasineura Dielsi Rübsaamen (Diptera: Cecidomyiidae) females to host plant volatiles
In 2001, Dasineura dielsi (Diptera: Cecidomyiidae), a gall midge, was introduced into South Africa as a biological control agent on the invasive alien plant species, Acacia cyclops (Mimosaceae). An investigation was launched to test the following hypotheses: 1) the midges respond to the scent of A. …
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Effects of habitat and plant volatiles on mosquito spatial, seasonal, and chemical ecology
… Mosquitoes interpret and respond to chemical volatiles very differently depending on their environment (temperature, humidity, time of day, etc.) and species-specific host preferences (humans, mammals, etc.). However, the impact of ecological factors on mosquito prevalence, sugar-feeding, and …
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Effects of water chemistry and panning on flavor volatiles and catechins in teas (Camellia sinensis)
… min (P<0.05) than 20 or 60 minutes. For SDE, 128 volatiles were identified using GC-MS and 45 aroma active compounds using GC-O. The number of volatiles identified using GC-MS was lower in SPME than SDE. For SPME, 59 volatiles and 41 aroma active compounds were identified. The composition of the …
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Experience with the association of volatiles with food does not affect response in three insect predators
Predadores e parasitóides de artrópodes herbívoros utilizam vários odores durante a busca por presas, tal como feromônios sexuais e de agregação de suas vítimas, assim como voláteis de plantas cuja produção é induzida pela herbivoria. Insetos são capazes de detectar uma vasta gama de compostos …
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The use of mineral oil as a trapping agent for volatiles produced by Ceratocystis moniliformis (Hedg.)
Ceratocystis moniliformis grows well in a semi-synthetic liquid medium containing 30:1 glucose:yeast extract, vitamins, and minerals. At 25°C and 100 rpm on a rotary shaker, the culture grows and produces many pleasing and potentially useful fruity aroma-bearing compounds. A sensory evaluation …
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