196,057 research outputs found
Measurement of isoprenoid content in leaves of Mediterranean Quercus spp. by a novel and sensitive method and estimation of the isoprenoid partition between liquid and gas phase inside the leaves
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Incomplete C-13 labelling of alpha-pinene content of Quercus ilex leaves and appearance of unlabelled C in alpha-pinene emission in the dark
No full textConstitutive and herbivore-induced monoterpenes emitted by Populus x euroamericana leaves are key volatiles that orient Chrysomela populi beetles
No full textOperating principles of analytical techniques adopted to characterize organic compounds in air
No full textNowadays, indoor pollution is among the key topics in environmental sciences, due to impact on safety of life and work places. From both the physical (micro-climatic and fluid-dynamic) and chemical points of view, interiors experience situations very different from outdoors, and also within themselves. In particular, toxicants affecting air show distinct concentration profiles and behaviours, due to extension and nature of surfaces, low level of oxidants like ozone, presence of specific sources, ventilation and air exchange intensity.
Due to wide range of concentrations, VOCs are measured by applying specific procedures and instruments.
A recent category of air monitors is represented by sensors, which join quickness and easy access of response, reduced costs and space occupied, non-invasive character, chance of aggregating in rack
Influence of environmental factors and air composition on the emission of alpha-pinene from Quercus ilex leaves
No full textOccurence of Oxygenated Volatile Organic Compounds (VOC) in Antarctica
No full textPolar and non-polar VOC present in six different sites located near Terra Nova Bay in Antarctica were determined by HRGC-MS. 76 different components were positively identified. Among them, particularly important are oxygenated components (free acids, aldehydes, ketones, alcohols, esters, ethers and furanes) as they account for the largest portion of the organic fraction. Biogenic emission seem to be the major source for many of them. This would explain their ubiquitous occurrence in the troposphere
Evidence of the photosynthetic origin of monoterpenes emitted by Quercus ilex L leaves by C-13 labeling
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