flavor properties of volatile compounds from oil oxidation

PREDICTION OF CHEMICAL REACTIVITY PARAMETERS AND PHYSICAL PROPERTIES OF ORGANIC COMPOUNDS FROM MOLECULAR STRUCTURE USING SPARC pptx

Ngày tải lên : 22/03/2014, 14:20

... properties to Program Offices (e.g., Office of Water, Office of Solid Waste and Emergency Response, Office of Prevention, Pesticides and Toxic Substances) and Regional Offices Also, SPARC has been used ... number of molecular structures The values of these latter parameters, in most instances, must be derived from measurements or from the expert judgment of specialists in that particular area of chemistry ... number of organic compounds strictly from molecular structure, as shown in Table SPARC has been in use in Agency programs for several years, providing chemical and physical properties to Program Offices...

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Preparative isolation and purification of six volatile compounds from essential oil of Curcuma wenyujin using high-performance centrifugal partition chromatography doc

Ngày tải lên : 07/03/2014, 21:20

... total of mg of curdione (1), mg of curcumol (2), 10 mg of germacrone (3), 18 mg of curzerene (4), mg of 1,8-cineole (5) and 17 mg of b-elemene (6) from the essential oil (300 mg) in 2.4 mL of the ... grade were purchased from Merck (Darmstadt, Germany) The essential oil of Curcuma wenyujin was purchased from Zhejiang Ruian Pharmaceutical (Ruian, China) The reference compounds of curdione (1), ... coefﬁcient K of the target compounds The K values were determined by GC-MS analysis as follows: One drop (about mg) of the essential oil was added to the mixture of equal volume of the upper...

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Characterization of volatile compounds in selected citrus fruits from asia

Ngày tải lên : 11/09/2015, 09:11

... present in the oil and those in the juices 2.3.2.1 Volatile compounds in the citrus oil The oil- soluble compounds of citrus fruits are present in peel oil and in juice oil The peel oil is located ... threshold of volatiles, synergistic effect between volatiles and the interaction of non -volatile with volatile flavour compounds (Nisperos-Carriedo and 21 Shaw, 1990) The volatile compounds present ... Characterization of Volatile Compounds in Selected Citrus Fruits from Asia Part II: Peel Oil J Essent Oil Res 20: 21-24 Dharmawan J, Kasapis S and Curran P 2008 Unveiling the Volatile Compounds of Citrus...

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Tài liệu Báo cáo khoa học: Properties of ecdysteroid receptors from diverse insect species in a heterologous cell culture system – a basis for screening novel insecticidal candidates docx

Ngày tải lên : 18/02/2014, 08:20

... alignment of N-terminal (A ⁄ B) domains of LdEcR and DmEcR (A) Alignment of EcRA from the two species (B) Alignment of DmEcRB1, DmEcRB2, and LdEcRB (C) Alignment of most carboxy-terminal side of the ... capabilities from speciﬁc species Hundreds of phytocompounds that act as nonsteroidal and steroidal agonists of the insect ecdysteroid 3088 receptor have been identiﬁed [22,23], and a large number of JH ... (A ⁄ B) domains of EcR are also divergent in the two insect species [31] (Fig 1), although all of the isoforms from both species share almost complete identity over a stretch of 35–37 amino acids...

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Báo cáo Y học: Spectroscopic characterization and ligand-binding properties of chlorite dismutase from the chlorate respiring bacterial strain GR-1 ppt

Ngày tải lên : 08/03/2014, 16:20

... mechanism of chlorite dismutase Several considerations are important in the determination of the reaction mechanism of chlorite dismutase First of all, the valence of Cl in ClO2– is reduced from + ... decreases as the result of further oxidation of the heme by the excess hydrogen peroxide EPR spectroscopy of chlorite dismutase and adducts Ferric chlorite dismutase exhibits a mixture of two high-spin ... Spectroscopic properties of chlorite dismutase The EPR spectroscopic properties of chlorite dismutase have been studied in detail The published EPR spectra on chlorite dismutase from I dechloratans...

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physical properties of chemical compounds

Ngày tải lên : 01/04/2014, 10:10

... of vapor density we then solve the two equations for the values of A'· and B /• as in the case of A· and B· Ac, Bc, Cc: Constants of the Antoine vapor pressure equation for the liquid state from ... 10.1021/ba-1955-0015.ch001 dt/dp: Rate of change of boiling point with pressure, given by equation dt/dp = B/ [2.3026 X P X (A - log P)2Jo C./mm ~Hm: Latent heat of fusion in caL/g ~Hv: Latent heat of vaporization ... general are the boiling point at 30 mm to a TR of 0.75 to 0.80 See method of obtaining A, B, C on page Antoine equation: log P = A - B/(t + C) A·, B*, K, c, tk, tx: Constants of the saturated...

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Selective removal of estrogenic compounds from aqueous solution using novel adsorbent molecularly imprinted polymer

Ngày tải lên : 11/09/2015, 10:15

... to remove target compounds, and which aspects of properties of MIP should be improved 2.2 Categories and properties of estrogenic compounds A precondition for the understanding of EDCs is to know ... properties of target estrogenic compounds are shown in Table 2-1 Fig 2-1 shows the molecular structures of four typical compounds Table 2-1 Properties of target estrogenic compounds Compounds ... 4-26 Effect of HA on the adsorption of BPA 141 Fig 4-27 Effect of pH on the adsorption of E1 144 Fig 4-28 Effect of pH on the adsorption of E2 145 Fig 4-29 Effect of pH on the...

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Kinetic changes of volatile compounds during longan juice fermentation with single and mixed cultures of yeasts

Ngày tải lên : 08/11/2015, 17:24

... has both volatile compounds and nonvolatile compounds including organic acids, sugars, vitamins, amino acids 2.1.2 Volatile compounds 2.1.2.1 Volatile compounds in longan juice Volatile compounds ... carry out the cofermentation of longan juice with the aim of exploiting the positive roles of both yeasts Two inoculation ratios of yeasts are compared in terms of their effects on the volatile flavour ... of wine quality Chapter is a review of literature on the nutritional compounds of longan (including non -volatile and volatile compounds) and the fermentation of longan juice to produce longan wine,...

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single crystal growth and magnetic properties of rrhin5 compounds

Ngày tải lên : 14/01/2016, 13:46

... magnetic properties of RRhIn5 series The present thesis consists of the following contents In Chap 2, the fundamental 2.1 Magnetic Properties of Rare Earth Compounds Magnetic properties of rare ... calculations 2.4 MAGNETIC PROPERTIES OF RIN3 AND RRHIN5 COMPOUNDS 2.4 27 Magnetic properties of RIn3 and RRhIn5 compounds 1) RIn3 compounds Rare earth intermetallic compounds RIn3 (R: rare earths) ... Abstract A series of ternary compounds RRhIn5 (R: rare earths) was grown in the single crystalline form by means of the ﬂux method Magnetic properties of these compounds were investigated...

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Physical properties of chemical compounds comp by r r dreisbach

Ngày tải lên : 02/12/2016, 12:56

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RESEARCH ON THE CHANGE OF 2-AP AND OTHER VOLATILE COMPOUNDS IN PROCESSING BUN FROM RICE

Ngày tải lên : 28/08/2013, 16:28

... and collidine as internal standard Duration of extraction was 30 minutes from apparition of the first drop of water in the bottom of the condensed tube Volatile compound extracts were then concentrated ... Quantification of 2-AP in pandan leaf: Fig System of the SPME extraction 732 Content of - AP in pandan leaf extracted by SDE was calculated as follows: Research on the Change of 2-AP and Other Volatile Compounds ... chromatograph of OM 6162 exposed the peak 2-AP at the Rt 9.678 minute 734 Research on the Change of 2-AP and Other Volatile Compounds in Processing Bun from Rice 3.4 Investigating the changes of 2-AP...

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BÁO CÁO "RESEARCH ON THE CHANGE OF 2-AP AND OTHER VOLATILE COMPOUNDS IN PROCESSING BUN FROM RICE" doc

Ngày tải lên : 19/03/2014, 16:20

... and collidine as internal standard Duration of extraction was 30 minutes from apparition of the first drop of water in the bottom of the condensed tube Volatile compound extracts were then concentrated ... Quantification of 2-AP in pandan leaf: Fig System of the SPME extraction 732 Content of - AP in pandan leaf extracted by SDE was calculated as follows: Research on the Change of 2-AP and Other Volatile Compounds ... chromatograph of OM 6162 exposed the peak 2-AP at the Rt 9.678 minute 734 Research on the Change of 2-AP and Other Volatile Compounds in Processing Bun from Rice 3.4 Investigating the changes of 2-AP...

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Báo cáo hóa học: " Ab Initio Prediction of Boron Compounds Arising from Borozene: Structural and Electronic Properties" ppt

Ngày tải lên : 22/06/2014, 00:20

... generalized gradient approximation (GGA), in terms of structural and electronic properties of two boron compounds, B60H12 and B228H24, in which the molecule of borozene can be considered as the building ... boron counterpart of coronene, whereas the structure of B228H24 was obtained by surrounding B60H12 with one series of borozene rings, therefore this cluster is constituted by a total of 24 borozene ... of B228H24 were carried out by means of the minimal basis set STO-3G whereas the more extended Pople basis set 6-311G was used in the optimizations of B60H12 In order to estimate the degree of...

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Estimation of emissions of nonmethane organic compounds from a closed landfill site using a landfill gas emission model

Ngày tải lên : 05/09/2013, 16:11

... potential (m3/mg of waste), Mi = the mass of solid waste in the ith section of the landfill (mg), ti = the age of the ith section of the section of the landfill (years), t = the age of the landfill ... Journal of Energy and Environment (IJEE), Volume 4, Issue 1, 2013, pp.85-92 Figure Graph of frequency against range of values of age of landfill (t) Figure represents range of values of the total ... toxicity from methane, carbon dioxide, and volatile organic compounds respectively The generation of methane and carbon dioxide from landfills has been well studied, and a very large body of literature...

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Tài liệu Glossary of Volatile Organic Compounds ppt

Ngày tải lên : 14/02/2014, 03:20

... water In soil, most ethylbenzene is broken down by soil bacteria Ethylbenzene is released into the environment from burning oil, gas, and coal, and from discharges of ethylbenzene from factories ... part of crude oil, gasoline, and cigarette smoke Benzene is one of the major components of JP-8 fuel Industry is the main source of benzene in the environment Emissions from burning coal and oil, ... exhaust Route of exposure Styrene can be found in air, soil, and water after release from the manufacture, use, and disposal of styrene-based products It evaporates from shallow soils and surface...

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Tài liệu Báo cáo khoa học: Properties of the recombinant glucose⁄galactose dehydrogenase from the extreme thermoacidophile, Picrophilus torridus ppt

Ngày tải lên : 19/02/2014, 16:20

... obtained from Novagen Expression of Pt-gdh under the control of araB promoter was induced for h at 30 °C by the addition of 0.2% arabinose when the A600 of the growing culture reached 0.5 The cells from ... which was : 20 in both cases, as well as the ratio of d-glucose ⁄ d-galactose oxidation rates (Table 2) Table Comparison of some properties of the native P torridus glucose dehydrogenase activity ... bottom of the cleft and a lobe containing the structural zinc at the mouth of the cleft and thus exposed to the solvent [8] Gradual depletion of the enzyme ﬁrst of the structural and then of the...

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Tài liệu Báo cáo khoa học: Enzymatic properties of wild-type and active site mutants of chitinase A from Vibrio carchariae, as revealed by HPLC-MS pptx

Ngày tải lên : 20/02/2014, 01:20

... afﬁnity with chain 3381 Enzymatic properties of chitinase A from Vibrio carchariae length of chitooligomers implies that the binding site must be composed of an array of subsites, probably six GlcNAc ... obtained from the hydrolysis of (GlcNAc)4 These oligomers presumably arose from the condensation of two reaction intermediates, namely the pentamer from (GlcNAc)2+(GlcNAc)3, the hexamer from (GlcNAc)2+(GlcNAc)4 ... Km and kcat values obtained from the FEBS Journal 272 (2005) 3376–3386 ª 2005 FEBS Enzymatic properties of chitinase A from Vibrio carchariae Table Kinetic parameters of chitinase A with various...

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Tài liệu Báo cáo Y học: Antibacterial and antifungal properties of a-helical, cationic peptides in the venom of scorpions from southern Africa pptx

Ngày tải lên : 21/02/2014, 15:20

... poreforming peptide of 45 amino acid residues from the venom of the South African scorpion Parabuthus schlechteri [4] Here we describe the isolation of new pore-forming peptides from the venom of Opistophtalmus ... 50% of growth of the tested organisms at a concentration of lM at most (see Table 3) Opistoporin is the most active, inhibiting 50% of growth of N crassa and F culmorum at a concentration of 0.8 ... mass of the active fraction was determined by nanoﬂow electrospray (ESI) double quadrupole (Qq) orthogonal acceleration (oa) time of ﬂight (TOF) MS on a Q-TOF system (Micromass, UK) An aliquot of...

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Tài liệu Báo cáo Y học: Electrochemical, FT-IR and UV/VIS spectroscopic properties of the caa3 oxidase from T. thermophilus docx

Ngày tải lên : 21/02/2014, 15:20

... FT-IR spectroscopic properties of the caa3oxidase from T thermophilus in the presence and absence of cyanide, and compare the observed properties to previous reports on members of the heme copper ... originating from heme c, with contributions from the formyl groups and from the geranyl side chain expected from heme a and a3 In addition to the signals of the hemes, the reorganization of the polypeptide ... on the basis of the comparison to IR and Raman spectra of heme model compounds, other oxidases, spectra of isolated amino acids as model compounds and information on contributions from the secondary...

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Tài liệu Báo cáo Y học: Kinetic properties of bifunctional 6-phosphofructo-2-kinase/ fructose-2,6-bisphosphatase from spinach leaves pdf

Ngày tải lên : 22/02/2014, 04:20

... ratio of 6PF2K activity to Fru-2,6-P2ase activity of the smaller form of the bifunctional enzyme was far lower than that of the larger form of the enzyme [11] This is reminiscent of the enzyme from ... concentration of each of these metabolites and of Pi, as discussed previously [1] In conclusion, the kinetic properties of the recombinant enzyme are in agreement with those of the enzyme isolated from ... blots of total RNA from spinach leaves, the same probe hybridized to a single band of % 2500 bp, corresponding to the length of the isolated cDNA (Fig 2A) Expression of the coding region of 6PF2K/Fru-2,6-P2ase...

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