synthesis of epoxy derivatives of polycyclic aromatic hydrocarbons

Ngày tải lên: 13/11/2014, 15:58

... Biodegradation aspects of Polycyclic Aromatic Hydrocarbons (PAHs): A review, Journal of Hazardous Materials 169 (2009) 1-15 Bach Quang Dung, Enhancement of intrinsic bioremendiation of PAHs-contaminated ... analysis of polycyclic aromatic hydrocarbons in sewage sludge from wastewater treatment plants, Journal of Chromatography A 938 (2001) 57-65 S.R Wild, S.P McGrath, K.C Jones, The polynuclear aromatic ... yields in the case of (SL + OW) relation to the number of aromatic rings 3.2 Sludge+Organic waste+Tween 80 treatment In case of (SL + OW + Tween 80) is similar to the case of (SL + OW), degraded...

Ngày tải lên: 24/06/2015, 08:16

... characterize the source of hydrocarbon contamination 10.2 PAHs The occurrence of one or more of any of the 16 PAHs of food safety concern is indicated by the presence of transition ions (quantifier ... matched against that of crude oil sample from the Gulf of Mexico The composition of crude oil from the Gulf of Mexico is given in Table indicating relatively high levels of n-hexadecane, n-heptadecane ... Aliphatic hydrocarbons – The method was shown to be unsuitable for recovery of aliphatic hydrocarbons below n-pentadecane due to losses during concentration of the sample extract Average recoveries of...

Ngày tải lên: 09/09/2015, 09:38

... EFFECTS OF SURFACTANT ON BIODEGRADATION OF MODEL POLYCYCLIC AROMATIC HYDROCARBONS LI JINGLIANG (M Eng TIANJIN UNIV) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT OF CHEMICAL ... of wt% Tergitol 15-S-5 101 5.4 Cloud point of Tergitol 15-S-7 as a function of surfactant concentration 102 5.5 Effect of Inorganic Salts on Cloud Point of wt%Tergitol 15-S-7 104 5.6 Effect of ... of interest There are many factors that can affect the partition of solutes Several authors have studied the effect of various experimental factors on the partition mainly of polar aromatic hydrocarbons...

Ngày tải lên: 16/09/2015, 17:11

... KH-41-01-373-EN-N Ambient air pollution by Polycyclic Aromatic Hydrocarbons (PAH) Position Paper ISBN 92-894-2057-X OFFICE FOR OFFICIAL PUBLICATIONS OF THE EUROPEAN COMMUNITIES L-2985 Luxembourg ... acknowledged Ambient Air Pollution by Polycyclic Aromatic Hydrocarbons (PAH) Position Paper July 27th 2001 Prepared by the Working Group On Polycyclic Aromatic Hydrocarbons PAH Position Paper July ... are often based on a limited number of samples The factors often exhibit a wide range of values - consequently their use can lead to widely differing estimates of emissions from the same type of...

Ngày tải lên: 17/02/2014, 11:20

... 1994 Polycyclic Aromatic Hydrocarbons in U.K Urban Air Environ Sci Technol 28: 2380-2386 MENICHINI E., MONFREDINI F & MERLI F 1999 The temporal variability of the profile of carcinogenic polycyclic ... 4-nitroacenapthylene 1-nitrofluorene 2-nitrofluorene 3-nitrofluorene 4-nitrofluorene two nitroisomers 1-nitroanthracene 2-nitroanthracene 2-nitrofluoranthene 7-nitrofluoranthene 8-nitrofluoranthene 2-nitropyrene ... SOURCES OF DATA INCLUDE FOR TABLE INCLUDE: RESPONSES TO QUESTIONNAIRES SENT OUT BY THE WORKING GROUP and BAEK et al., 1992 Concentrations of particulate and gaseous polycyclic aromatic hydrocarbons...

Ngày tải lên: 15/03/2014, 16:20

... Academy of Sciences, Polycyclic Aromatic Hydrocarbons: Evaluation of Sources and Effects (National Academy Press, Washington, DC, 1983) 102 G Grimmer, Ed., Environmental Carcinogens: Polycyclic Aromatic ... 99 National Academy of Sciences, Particulate Polycyclic Organic Matter (National Academy Press, Washington, DC, 1972) 100 A Bjørseth, Ed., Handbook of Polycyclic Aromatic Hydrocarbons (Dekker, ... is formed by the oxidation of NO (the major nitrogenous byproduct of combustion) after dilution in air This conversion of NO to NO2 occurs as part of the oxidation of organic compounds, initiated...

Ngày tải lên: 15/03/2014, 20:20

... 1.2 Theory of Microwave Synthesis 1.3 Equipments Used in Microwave Synthesis 1.4 Safety Precautions in Microwave Synthesis 1.5 Coupling of Microwave ... achieved regardless of the volume of the vessel Thus, in conventional heating methods for organic synthesis the heat is basically transferred by conductance and the extent of transfer of energy to the ... the kinetics of the reaction becomes easy when the control of the applied energy becomes more direct and precise 1.2 Theory of Microwave Synthesis There are two specific mechanisms of interaction...

Ngày tải lên: 29/05/2014, 17:31

... the percentage of the absorbance decrease of the product of the synthesis that could prevent the degradation of the 2-deoxyribose compared to the blank When the sample of the synthesis works ... acetone and benzaldehyde and its derivatives. 17,18 The structures of benzalacetone and its derivatives are shown in Figure The products of the synthesis were in the form of color powder ranging from ... concentration of the compounds that caused 50% inhibition BHT was used as a positive control Synthesis of Hydroxyl Radical Scavengers 64 RESULTS AND DISCUSSION Synthesis of benzalacetone and its derivatives...

Ngày tải lên: 07/08/2014, 14:20

... Figure a: Overview of metabolism; Figure b: Overview of photosynthesis; Figure c: Overview of carotenoid biosynthesis; Figure d: Overview of protein targeting; Figure e: Overview of cellular responses; ... in higher plants exposed to polycyclic aromatic hydrocarbons and their N-heterocyclic derivatives Environ Toxicol Chem 2006, 25:3238-3245 Burritt DJ: The polycyclic aromatic hydrocarbon phenanthrene ... well as the suggested follow-on research, will be of great value in breeding and engineering plants for phytoremediation of polycyclic aromatic hydrocarbons Conclusions The microarray experiments...

Ngày tải lên: 12/08/2014, 03:21

Ngày tải lên: 14/11/2014, 08:23

... XIAOWEI Table of Contents Thesis Declaration i Acknowledgements iii Table of Contents iv Summary ix List of Tables xi List of Figures xiii List of Schemes xiv List of Abbreviations xvii List of Publications ... Reaction Optimization for the Synthesis of Chiral 3Chlorooxindoles 134 5.2.2 Substrate Scope for the Synthesis of Chiral 3Chlorooxindoles 136 5.2.3 Facile Synthesis of Various 3-Heteroatom-substituted ... 3.4.2 Analytical Data of the 2,3-Dihydrofuran Products 72 Chapter Diastereodivergent Synthesis of 3-Spirocyclopropyl-2-oxindoles through Direct Enantioselective Cyclopropanation of Oxindoles 4.1 Introduction...

Ngày tải lên: 10/09/2015, 09:06

... cost scaling up of production High absorption coefficient of organic molecules enables to harvest a large amount of light with small amount of materials In addition, flexibility of organic molecules ... efficiency of 6.5% achieved In 1991, Professor Gratzel developed a new concept of dye sensitized solar cell which combines the advantage of the highly conducting inorganic part and the ease of processing ... is the ratio of the number of charge carriers collected by the solar cell to the number of photons of a given energy shining on the solar cell IPCE therefore relates to the response of a solar...

Ngày tải lên: 10/09/2015, 15:49

... Review 1.2.1 Linear Aromatic Oligoamides The simplest structural motif of aromatic oligoamides is the linear strand In a linear oligomer, there is almost no contact between aromatic units remote ... switching Figure 1.2 Proposed conformational change of aromatic oligoamides in solution 1.2.2 Crescent and Helical Aromatic Oligoamides Among all aromatic oligomers, crescent-shaped oligomers or ... into the helical structures enforced by aromatic pyridine oligoamides They first reported an elegant system of double helical aromatic oligoamides consisting of pyridine residues, with backbones...

Ngày tải lên: 10/09/2015, 15:49

... crystal structures of a series of oligomers, which allows a qualitative correlation between the conformational stability of the H-bond enforced backbones and the 18 strength of individual H-bonds ... of the products and recycling of the starting material This chemoselective alkylation was unambiguously confirmed by the determined crystal structure of 1c (Figure 2.3) Attempted nitrations of ... chloroformate, 4-methylmorpholine, CH2Cl2, 1t (for 2b) or 1k (for 2d) or 1l (for 2e), RT, 72~77%; c) ethyl chloroformate, 4-methylmorpholine, CH2Cl2, 1k, RT 67~83% Scheme 2.3 Synthesis of Hexamer...

Ngày tải lên: 10/09/2015, 15:49

... backbone curvature of aromatic folamers and 92 (3) corroborate the power of ab initio molecular modeling at the B3LYP/6-31G* level in the satisfactory prediction of 3D topologies of aromatic foldamers.2f,6 ... Partial spectrum showing contact observed between aromatic protons and aromatic protons 3.2.2 Helical Conformation of Heptamer Scheme 3.1 Synthesis of heptamer 7a OC 8H 17 O O NO2 N O O N H O O O ... previously.3c Figure 3.1 Side and top views of oligoamides and 6: (a) crystal structure of pentamer 5a, (b) ab initio calculated structure of 5a and (c) crystal structure of hexamer 6a Interior methoxy methyl...

Ngày tải lên: 10/09/2015, 15:49

... indicator of the presence of strong H-bonding interactions, leading to the rigidification of the amide linkages and a crescent aromatic backbone Figure 4.2 1H NMR spectrum (500 MHz, 298 K, CDCl3) of ... ppm as a result of the H-bonding ability of DMSO 4.2.7 Crystal Structure of a Tetramer and Computational Molecular Modeling of Circular Pentamer To demonstrate the existence of intramolecular ... circular pentamer prefers the up-down-up-down-up fashion in terms of orientation of five interior methyl side chains 4.2.2 Synthesis of Circular Pentamer A highly rigid and structurally well defined...

Ngày tải lên: 10/09/2015, 15:49

... analysis of inhibitory effect of 10a in 50 mM NaCl, (d) PAGE analysis of inhibitory effect of 11a in 50 mM KCl and (e) PAGE analysis of inhibitory effect of 11a in 50 mM NaCl (f) Comparison of inhibitory ... PCR template: (a) PAGE analysis of inhibitory effect of 9b in 50 mM KCl, (b) PAGE analysis of inhibitory effect of 9a in 50 mM KCl and (c) comparison of the effect of 9b and 9a on the double-stranded ... performed in the presence of different concentrations of aromatic oligoamides A typical PAGE for PCR stop assay on circular pentamer 10a is shown in Figure 5.3 The synthesis of double-stranded PCR...

Ngày tải lên: 10/09/2015, 15:49

... detection of small molecules, whereas so far only a few studies34-36 reported the detection of proteins by 178 the integration of AuNPs with aptamers The commonly employed protein for proof -of- concept ... influence of both buffers of varying compositions and varying numbers of DNA molecules on the surface of gold nanoparticles on the detection limit was also investigated Three types of buffers ... presence of many proteins was tested As expected, a mixture solution of 10-fold excess of human γ-thrombin, BSA and Factor Xa did not interfere with the detection of trace levels (10 nM) of human...

Ngày tải lên: 10/09/2015, 15:49

... production of ds DNA product in the presence of no small molecule (lane 1), 2c (lane 2), 3f (lane 3) and 5b (lane 4) Figure 7.12 Colorimetric assay of acyclic oligomers showing (a) the disaggregation of ... concentration of 10a was higher than μM, suggestive of the binding interaction between 10a and TBA (Figure 7.2a) a) 10a (μM) Lane ds ss b) 10a (μM) Lane ds ss Figure 7.2 Effect of 10a on the ... nanoparticles-based colorimetric detection of G-quadruplex-binding molecule: (a) Au-TBA only, (b) Au-TBA in the presence of thrombin, (c) Au-TBA in the presence of thrombin and 10a (2 μM) 0.7 Absorbance...

Ngày tải lên: 10/09/2015, 15:49