α-pinene
α-pinene photooxidation under controlled chemical conditions – Part 1: Gas-phase composition in low- and high-NO<sub>x</sub> environments
... of α-pinene hydroxy dihydroperoxide which would be detected at m/z ...forming α-pinene hydroxy dihydroperoxide. Sim- ilarly, the α-pinene hydroxy hydroperoxide peroxy radical ...
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Efficient isomerization of α-pinene oxide to campholenic aldehyde promoted by a mixed-ring analogue of molybdenocene
... homologue of the sandalwood odorant Polysantol®. Tetrahedron 2005, 61, 11192-11203. (15) Srikrishna, A.; Neetu, G. Chiral synthons from campholenaldehyde: enantiospecific synthesis of diquinane and linear triquinanes. ...
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Explicit modelling of SOA formation from α-pinene photooxidation: sensitivity to vapour pressure estimation
... were implemented in a detailed model for SOA formation. The chemical schemes were generated using the Generator for Explicit Chemistry and Kinetics of Organics in the Atmo- sphere (GECKO-A) (Aumont et al., 2005; Camredon ...
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α-pinene photooxidation under controlled chemical conditions – Part 2: SOA yield and composition in low- and high-NO<sub>x</sub> environments
... of α-pinene OH ox- idation in the presence of no (black, gray), neutral (shades of green), or acidic (shades of red) seed particles under (a) low-NO x con- ditions and (b) high-NO x conditions where ...
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Real refractive indices and volatility of secondary organic aerosol generated from photooxidation and ozonolysis of limonene, α-pinene and toluene
... α−pinene SOA from ozonolysis had about 15 % lower MFRs than limonene ozonol- ysis SOA, the reverse of the photooxidation volatility trend. For both terpenes, addi- tion of a scavenger did not have a ...
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Parameter estimation of the kinetic α -pinene isomerization model using the MCSfilter algorithm
... A recent work [ 10 ], in which the α-pinene system was also used for testing purposes, details the development and implementation of the Firefly Algorithm. This is a stochastic method for global ...
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Relating hygroscopicity and optical properties to chemical composition and structure of secondary organic aerosol particles generated from the ozonolysis of α-pinene
... smaller than the sensitivity of the H-TDMA. (2) Other fac- tors, other than the bulk O : C, can control the water uptake of SOA. Recently, Alfarra et al. (2014) reported a positive correlation between hygroscopicity of ...
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Ozonolysis of α-pinene: parameterization of secondary organic aerosol mass fraction
... high α-pinene concen- trations (>10 ...of α-pinene (<5 ppb or atmospherically relevant organic aerosol levels <10 µg m −3 ...no α-pinene SOA parameterizations which have ...
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Antibiotic resistance modulation and modes of action of (-)-α-pinene in Campylobacter jejuni.
... The aim of the study was to investigate the mode of action of (-)-α-pinene in terms of its modulation of antibiotic resistance in Campylobacter jejuni. Broth microdilution and ethid- ium bromide ...
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Observation of viscosity transition in α-pinene secondary organic aerosol
... Ignatius, K.: Heterogeneous ice nucleation of viscous secondary organic aerosol produced from ozonolysis of alpha-pinene, Atmos. Chem. Phys. Discuss., in preparation, 2015. 28596 Jimenez, J. L., Canagaratna, M. ...
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The acid-catalyzed hydrolysis of an <i>α</i>-pinene-derived organic nitrate: kinetics, products, reaction mechanisms, and atmospheric impact
... from α-pinene-derived nitrate hydrolysis may lead to a reduction in aerosol mass by the partitioning of prod- ucts back into the gas phase, lowering particle mass con- ...another α-pinene ...
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Observation of viscosity transition in <i>α</i>-pinene secondary organic aerosol
... Organic particulate material is abundant in Earth’s atmo- sphere. Biogenic and anthropogenic sources emit volatile organic compounds (VOCs), which are oxidized through a cascade of chemical reactions into extremely low ...
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A group contribution method for estimating the vapour pressures of α-pinene oxidation products
... pendence of the hydroperoxide group contribution with temperature. In any case, the contribution of these semi-volatile products to the aerosol phase is expected to be less important than predicted by Bonn et al. (2004). ...
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Acetoxilação de α-Pineno com catalisadores heterogéneos
... α-Pinene is a renewable raw material usually obtained from pine gum or as a waste from the Kraft process [1,2,3,4]. Acid acetoxylation of terpenes are among the important synthesis routes to valuable ...
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Observations and implications of liquid–liquid phase separation at high relative humidities in secondary organic material produced by <i>α</i>-pinene ozonolysis without inorganic salts
... Experiments were also carried out to determine whether the lowest RH at which two phases existed depended on the direction of RH change. Values for the lowest RH at which two phases were observed when increasing and de- ...
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Loading-dependent elemental composition of α-pinene SOA particles
... of α-pinene. Shown are the mass yield α i , the decadal volatility C i ∗ (µg/m 3 ), the atomic ratios (O/C) i and (H/C) i , and the corresponding empirical formulas on a one-carbon ...of α i ...
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Mechanism reduction for the formation of secondary organic aerosol for integration into a 3-dimensional regional Air Quality Model: <i>α</i>-pinene oxidation system
... simple α- pinene oxidation mechanisms include one that was extracted from RACM (Barthelmie and Pryor, 1999), and a mechanism by Chen and Griffin (2005) that takes an ...
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Modelling the formation and composition of secondary organic aerosol from α- and β-pinene ozonolysis using MCM v3
... A further possibility involves the participation of bi- and multifunctional acid dimers in the aerosol formation process. Support for this has been provided by Hoffmann et al. (1998) and K¨uckelmann et al. (2000), who ...
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The NRAMPI, VDR and TNF- α
... Tuberculosis is one of the most common infectious diseases in the world [1]. Generally, the risk of developing disease in infected individuals, ranges from 5% to 10% [2]. This suggest that besides the Mycobacteria ...
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PRODUCTION AND PROPERTIES OF α
... of α-amylase production by Bacillus ...starch. α-amylase production reached a maximum at 48h, with levels of ...Subsequently, α-amylase levels remained more or less constant up to 96h and after 144h ...
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