synthesis of mtbe in liquid phase conditions

... agglomeration, however, cannot be distinguished using SAXS alone Because of its single-scattering character, it is quantitative as well in terms of determination of absolute mass of scatterers The signal ... exploiting PLAL is growing4–9 However, there is still a considerable lack of understanding of the most fundamental processes during this procedure The initial laser-induced heating of the target is ... also include the formation of a jet towards the interface43, which can cause material abrasion in cavitating mechanical devices The dynamics of a bubble with origin exactly at the interface, in

Ngày tải lên: 08/11/2022, 14:55

... available in the acidic hydrogen atom interacts with an acceptor carrying offers non-bonding interaction The strength mainly relies on the solvent, number, and G-bonding sequence of donor and ... the surrounding aqueous phase by the polar group of alkanols with a chain of hydrocarbons dissolved in THF Water/THF ratio in the balk amount of solution where the self-assemble of alkanols control ... outstanding properties due to the formation of different interactions, including hydrogen bonding, ionic bonding, and hydrophobic interactions The physical and chemical properties of SUPRAS

Ngày tải lên: 13/01/2022, 00:25

... displacement of the lining was determined as shown in Figure 5 to Figure 8 Figure 5 Bending moments of tunnel lining Trang 7Figure 6 Shear forces of tunnel lining Figure 7 Axial forces of tunnel lining ... ON BEHAVIOR OF TUNNEL IN SOFT SOIL CONDITIONS UNDER INFLUENCE OF EARTHQUAKES IN HO CHI MINH CITY NGUYENQUANGDUNG(1),LEBAOQUOC(2),NGUYENDUCTAM(3) (1)Department of Civil Engineering, Industrial ... considered interaction of turnel and platform following Hamada(1984), using the springs to replace the interaction of structure and enviroment in model or inposing the deformation of soil platform

Ngày tải lên: 11/01/2021, 04:33

... than one mode of interaction In addition, we made a lot of efforts in producing macro-porous polymer sheet (frit) used for SPE, a small part of the project The mechanical property of the frit is ... University – Ho Chi Minh City with the title “Synthesis of silica-based reverse-phase material possessing octadecyl groups (C18) and polymer-based strong cation-exchange material containing sulfonate ... than those of commercially available materials in the local market The production costs are also competitive In the case of cation exchange materials we are able to control the capacity in order

Ngày tải lên: 23/01/2021, 10:01

... Evaluation of number of publications concerning the combination of LPME methodologies (Source: Web of Science; Keywords: Liquid phase microextraction, liquid-phase microextraction, liquid-liquid ... L single drop of octane extraction, the rod was removed, and a GC syringe was used for the sampling and injection of the single dropsolvent into a GC the surface of the sample solution and inject ... causes the slowing of analyte transfer from the aqueous phase to the extraction phase because of thelow diffusion coefficients in liquids This leads to a lengthening of the extraction time in DI-SDME

Ngày tải lên: 13/01/2022, 00:11

... 1,3,5-triazine-2,4,6-triamine, is a triazine-based chemical containing high nitrogen level (66.7 g nitrogen in 100 g) This chemical is used widely in production of melamine resins which has a broad range of industrial ... Trang 1ORIGINAL ARTICLEDetermination of melamine in soil samples using surfactant-enhanced hollow fiber liquid phase microextraction followed by HPLC–UV using experimental design Department of Chemistry, ... determination of cyromazine and melamine residues in soil using LC–UV and GC–MSD J Agric Food Chem 2000;48:3352–8 [16] Qin Y, Lv X, Li J, Qi G, Diao Q, Liu G, et al Assessment of melamine contamination

Ngày tải lên: 13/01/2020, 17:01

... Institute of Drug Quality Control with its content of 99.5% Pantoprazole (PPZ) as an internal standard was provided from Institute of Drug Quality Control in Hochiminh City with its content of ... studies for determination of LPZ in plasma in Vietnam up to now Hence, we have studied to determine LPZ in dog plasma corresponding with drug quality control requirements in fluids This research ... was equilibrated with the initial mobile phase composition, followed by 6 injections of the same standard solution including PPZ at 2 µg/mL and LPZ at 1 µg/mL in mobile phase Trang 3 Table 1: System

Ngày tải lên: 23/01/2020, 10:46

... describe three stages in thematic synthesis: coding text; developing descriptive themes and generating analytical themes Data were extracted from included papers in two phases In phase 1, details ... full range of factors influencing treatment adherence and the needs of caregivers in relation to prescribed treatment regimens Many of our findings support those of the meta-ethnography of qualitative ... adherence in devel-oping countries, as the barriers to treatment adherence would differ substantially in this context To avoid misinter-preting reported findings, included papers were in English

Ngày tải lên: 02/03/2020, 17:35

... case of 8-hydroxyquinoline, only a significant Cu signal was obtained when using dihexyl ether as organic phase In contrast, when using APDC as complexing agent, interesting results were obtained ... tested Increasing stirring speeds (within the range 110–770 rpm) were used for the extraction (2 h) of standard solutions containing 50 µ g L −1 of the target metals The obtained results in terms of ... analysis of an aqueous standard containing 30 µ g L −1 of each metal The linearity of the proposed analytical methodology was examined for the concentration of analytes in the range of 5–100

Ngày tải lên: 13/01/2022, 00:14

... deter-mined following the hydrolysis of the carboxyl-reduced CPS Presence of L-alanine was confirmed by amino acid analysis For this, 0.6 mg of CPS was hydrolysed in 5.7M hydrochloric acid containing ... by TOF Analysis of thein vivo cultured A salmonicida strain 80204-1 cells In vivoculture was performed using ligated dialysis tubing bags filled with bacterial suspension of A salmonicida strain ... being minor components Fatty acids accounted for 7% (w/w) of the aqueous-phase LPS and 12% (w/w) of the phenol-phase LPS suggesting an under-acylation pattern The31P-NMR spectrum of aqueous-phase

Ngày tải lên: 23/03/2014, 13:20

... 10 C COX-2 COX-2 Actin Actin 1.5 ** * Relative band intensity Relative band intensity Fig Involvement of MEK signaling in the enhancement of COX-2 expression (A) Inhibition of Fluprostenol-activated ... MEK inhibitor, PD98059; a PLC inhibitor, U73122; a PKC inhibitor, bisindolylmaleimide I; and a general COX inhibitor, indomethacin, or a selective COX-2 inhibitor, NS-398, in the presence of Fluprostenol ... cascade and the binding of cyclic AMP response element (CRE) binding protein (CREB) to the COX-2 promoter Therefore, PGF2a suppresses the early phase of adipogenesis by de novo synthesis of anti-adipogenic

Ngày tải lên: 28/03/2014, 22:20

... outcomes in older adults by: 1) maintain-ing or augmentmaintain-ing physiological functions (e.g., preven-tion of sarcopenia); 2) reducing the likelihood of acquiring additional chronic conditions; ... reduced pain, and greater emotional wellbeing (i.e., happiness) The clinical relevance of the mediating role of physical activity can be inferred by com-paring the magnitude of the indirect effect ... measure each of the health attributes which were included as binary variables in our analyses And, there is a lack of independence in our categories of Trang 10chronic conditions For instance individuals

Ngày tải lên: 18/06/2014, 22:20

... research investigating mental health issues among male cleaning professionals represents an interesting area of study. The HSCL-25 was chosen as the primary index of mental health distress in the ... employed in the cleaning profession. Thus, our findings may provide more favourable results for working conditions and mental health than can be expected in the cleaning sector as a whole. In our ... survey of work- ing women in Norway [42]. An earlier study, investigating the risk of disability pensioning among cleaning staff members, found an even higher risk for disability pen- sioning in

Ngày tải lên: 20/06/2014, 00:20

... cortical bone longitudinal modulus of elasticity increases with increase in strain rate by a factor of 1.5 for strain rate of 1500 compared to 1.0 (1/sec), thus explaining in part the greater stiffness ... time in storage], test loading [strain] rate, relative stiffness of the potting-fixtures-testing machine [Kpft] to actual stiffness of the specimen [Ksa], fixture constraints Figure 6of the A) intact ... potting of the ends could be used to test a specimen in all three modes of loading: axial compression, torsion and bending In addition the bending fixtures were capable of applying uniform 4-point

Ngày tải lên: 20/06/2014, 01:20

... containing other metal/ligand combina-tions that can be envisaged [37] Here, we report the synthesis, characterization, and metal binding properties of our Cu-binding particles, as well as preliminary ... structure of dinuclear Cu (OAc) (H O) (right). Trang 3The difference between the amount released at 48 h andthat contained in the original loading solution deter-mined Cu loading, resulting in values ... added competing ligand, (D) release as a function of pH in the absence of competing ligand effects. Trang 5experimental findings Table 1 contains a summary ofCu weight percents determined for each

Ngày tải lên: 21/06/2014, 02:20

... images impinging the retinas One of this kind of problems concerns the perception of motion in depth (MID), that is, the capability of discriminating between forward and backward movements of objects ... engineering and computer science Born in Genoa, Italy, in 1940, he graduated in electronic engineering from the University of Genoa in 1965, and received the M.S degree in electrical engineering ... A detailed analysis of the phase behaviour in the joint space-time domain, and of its confidence, in relation to the directional tuning of the Gabor filters, evades the scope of the present paper

Ngày tải lên: 23/06/2014, 01:20

... consumption This leads a minor consumption of chemical compounds and a better elimination of the excess during the carbon washing process The effect of the increase in proportion of the impregnation ... consumption This leads a minor consumption of chemical compounds and a better elimination of the excess during the carbon washing process The effect of the increase in proportion of the impregnation ... one obtained from avocado peel (Singh & Kumar, 2008) have proven effective in diminishing COD during the treatment of cotton textile mill wastewater and wastewater from coffee processing plant,

Ngày tải lên: 28/06/2014, 17:20

... by small droplets of phase A conWned in larger droplets of phase B, which in turn are dispersed in a continuous phase A Depending on the nature of phase A, they can be distinguished as water/oil/water ... Nanoparticles in Liquid Crystals 4.2.3 Synthesis of Magnetic Nanoparticles in Liquid Crystals 4.2.4 Synthesis of Miscellaneous Nanoparticles in Liquid Crystals Nanoparticle Synthesis in ... Nanoparticle Synthesis in Microheterogeneous Systems Introduction Nanoparticle Synthesis in Liquid Crystals 4.2.1 Synthesis of Metallic Nanoparticles in Liquid Crystals 4.2.2 Synthesis of...

Ngày tải lên: 04/06/2014, 15:18

... catalysts in fine chemical synthesis 1.1.1 1.2 Synthesis of supported group 11 catalysts 1.1.2 Group 11 based catalysts in liquid phase reactions Borrowing Hydrogen methodology in fine chemical synthesis ... N-alkylation of nitroarenes using alcohols Table 6-1 Textural properties of the catalysts in the self-coupling of benzyl amines tested Table 6-2 Self-coupling of benzyl amine in the presence of different ... including the N-alkylation of amines by alcohols, reductive vi N-alkylation of nitroarenes by alcohols, and self-coupling of aromatic amines, in all cases using the borrowing hydrogen methodology In...

Ngày tải lên: 09/09/2015, 10:14

... catalysts in industry Compared to the successful use of zeolites in hydrocarbon processing, their use in the synthesis of organic intermediates and fine chemicals is in a relatively early state of development ... Al-containing Zr-beta zeolite 37 2.1.4 Synthesis of Ti-beta zeolite 37 2.1.5 Synthesis of Al- and Sn-beta zeolites 38 2.1.6 Synthesis of Al-beta sample in basic medium 38 2.1.7 Synthesis of Zr-SBA-15 ... of schemes XIV List of figures XVI List of abbreviations Chapter Introduction XX 1.1 General introduction 1.2 Synthesis of zeolite beta 1.2.1 Synthesis of zeolite beta in basic medium 1.2.2 Synthesis...

Ngày tải lên: 16/09/2015, 17:12