simultaneous determination of atenolol and amiloride by capillary electrophoresis with capacitively coupled contactless conductivity detection c 4 d

simultaneous determination of PAHs and PCBs by GCMS Analysis

Ngày tải lên : 09/09/2015, 09:39

... preparation standards (SES/SPS), recovery determination standard (RDS) and retention time window PCBs were purchased as individual compounds from LGC PromoChem (Teddington, Middlesex, U.K.) PCB analytes ... properties made PCBs ideal for use in the electricity and mining industries as cooling, insulating and hydraulic fluids With the exception of production and disposal sites the main sources of PCB emissions ... separation and identification of PAHs and PCBs by GCMS was successfully developed by this laboratory The programming of associated software to identify and differentiate between similar compounds was...

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Báo cáo khoa học: " Histopathological changes of testes and eyes by neutron irradiation with boron compounds in mice" pps

Ngày tải lên : 07/08/2014, 18:21

... yreviled thgiew ralucelom hgih ,sevitavired niryhprop ,selucelom gnidnib -AND ,sdica cielcun fo srosrucerp lacimehcoib ,sdica onima gniniatnoc-norob edulcni sdnuopmoc esohT dezisehtnys dna dengised ... stnemgdelwonkcA slairt lacinilc namuh rof detcudnoc eb dluohs seiduts lacinilcerp fo egnar ediw a dna noitubirtsid esod esicerp eht gnidrager snoitagitsevni rehtruF TCNB eht rof yticapac tneiciffus ... sruoh 42 retfa dna ,)lm dica citeca laicalg ,lm 52 nilamrof ,lm 57 los suoeuqa detarutas ,dica circip( diulf s’niuoB ni dexif erew setseT noitaidarri retfa syad 54 ta decifircas erew eciM ygolohtapotsiH...

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báo cáo hóa học: " Method optimization and validation for the simultaneous determination of arachidonic acid metabolites in exhaled breath condensate by liquid chromatography-electrospray ionization tandem mass spectrometry" doc

Ngày tải lên : 20/06/2014, 00:20

... standa) Calibration curve of 13, 14- dihydro-15-keto-PGD2 with PGE2 -d4 as internal standard and b) without internal standard Figure the corresponded product the deuterated standards with Standard ... Leukotrienes LTC4, LTD4 and LTE4 are known as cysteinyl-leukotrienes [7] Isoprostanes are formed by free radical-catalyzed lipid peroxidation of arachidonic acid and act as a bioactive product of lipid peroxidation ... Standard chromatogram of ion scans Standard chromatogram of the deuterated standards with the corresponded product ion scans nal standard to the corresponded group of substances than without internal...

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Simultaneous determination of sildenafil, vardenafil and tadalafil as forbidden components in natural dietary supplements for male sexual potency by high performance liquid chromatography–electrospray ionization

Ngày tải lên : 02/09/2015, 13:06

... before adding standards Peak identification: 1, sildenafil; 2, vardenafil and 3, tadalafil Fig The chromatogram of oral liquid preparation sample (A) Recorded with detection at 292 nm; (B) recorded with ... HPLC–UV–MS analysis of standards The examined analytes was baseline separated under the given chromatographic condition Fig shows the chromatogram of mixed standards recorded with 292 nm and with SIR, ... widely used HPLC technology [9–16] Tracqui and Ludes developed an HPLC–MS method for the determination of sildenafil [17]; Li et al reported a method for determining sildenafil with capillary electrophoresis...

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Báo cáo khoa học: "Simultaneous Determination of Various Macrolides by Liquid Chromatography/Mass Spectrometry" pps

Ngày tải lên : 07/08/2014, 15:20

... macrolides Simultaneous determination methods by HPLC with UV detector [6-11] have been developed, but these methods are difficult to detect macrolides such as erythromycin and roxithormycin due to ... electrochemical detector, which is more sensitive than UV detector But, these methods ar e difficu lt to set up a nalytic dition beca use th e determination methods by electrochemical detection ... resulted from the addition of the minor component, LC/MS based on their molecular weight could identify the minor component Conclusion LC/MS with electrospray is a simple, rapid and effective technique...

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simultaneous removal of arsenic and ammonia from groundwater by phytofiltration with cattails (typha spp.) cultivation tt

Ngày tải lên : 09/01/2015, 08:53

... FIELD: WASTE MANAGEMENT AND CONTAMINATED SITE TREATMENT SUPERVISOR: ASSC DR LE VAN CAT HANOI-2008 M C L C M C L C DANH M C C C CHỮ VIẾT TẮT DANH M C C C HÌNH VẼ DANH M C C C BẢNG BIỂU DANH M C ... HANOI UNIVERSITY OF SCIENCE TECHNISCHE UNIVERSITAT DRESDEN NGUYEN TIEN CU SIMULTANEOUS REMOVAL OF ARSENIC AND AMMONIA FROM GROUNDWATER BY PHYTOFILTRATION WITH CATTAILS (TYPHA SPP.) CULTIVATION MASTER ... ammonia Chuẩn bị dung d ch nư c ô nhiễm:  Dung d ch nư c nhiễm arsenite c nồng độ 300 µg/L: hóa chất As 2O3 pha nư c máy  Dung d ch nư c nhiễm arsenate c nồng độ 300 µg/L: hóa chất Na 3AsO4 pha...

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simultaneous removal of arsenic and ammonia from groundwater by phytofiltration with cattails (typha spp.) cultivation

Ngày tải lên : 09/01/2015, 08:53

... Alkalinity is determined by titration with a standard solution of a strong mineral acid to the successive bicarbonate, carbonic acid equivalence points, and indicated by means of color Reagents: ... (ethylenedinitrilo)-tetraacetate acid sodium salt, in nitrite-free distilled water and dilute to 100 mL Sulfanilic acid reagent: Completely dissolve 600 mg of sulfanilic acid in 70 mL hot distilled water, cool and add ... implemented in recent years However, applications of the above-mentioned technologies often faces difficulties and disadvantages such as high costs, complicated operation and maintenance skills In addition,...

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Novel methods for quantitative analysis and evaluation of effects of chronic exposure to microcystins by capillary electrophoresis and metabolomic studies

Ngày tải lên : 11/09/2015, 10:14

... 8-trimethyl-10-phenyldeca -4, 6-dienoic acid BGE Background electrolyte C4 D Capacitively coupled contactless conductivity detector CAPS N-cyclohexyl-3-aminopropanesulfonic acid CE Capillary Electrophoresis CSEI Cation ... solute band broadening caused by differences in the bulk velocity and in effect it improves separation efficiency compared to HPLC 40 , 42 , 44 Figure 10 Illustration of EOF profile 24 1 .4. 3 Detection ... range of endogenous small molecules such as sugars, amino acids and organic acids in addition to macromolecules such as proteins and nucleic acids Most of these are products and or intermediates of...

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Analysis of intact bacteria, bacterial DNA and mutagenic alkaloids by capillary electrophoresis

Ngày tải lên : 15/09/2015, 17:11

... specialized equipment [137-139] By using a charge -coupled device (CCD) camera coupled with laser induced fluorescence, moving pictures of the CE could be taken The movies revealed that under certain ... detection in CE is on -capillary detection The characteristics of on -capillary detection differ dramatically from those of postcolumn detection in HPLC In CE, migration velocity of each solute through ... for the CE detection, such as absorbance detection [85-89], fluorescence detection [90-92], electrochemical detection [93-96], conductivity [97-99] and mass spectrometry [100-102] etc In the...

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Tài liệu THE SECRETS OF SUCCRESS AND HAPPYNESS - By Jack Brannigan ppt

Ngày tải lên : 22/12/2013, 19:15

... successful execution with the conclusion that he should not take up the task Of course the can attitude is the attitude of a confident person, and confidence is the result of many successful accomplishments ... that have a 14 higher chance of success to build up confidence Then one can then take on more complicated projects There are bad managers who hand over difficult tasks to inexperienced employees ... The Secr et s of Success and Happiness By Jack Brannigan Published by IndependentBook.com, October 2000 © 2000 by Jack Brannigan All rights reserved No part of this book may be reproduced in any...

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EBook of Civics and Health, by William H. Allen pptx

Ngày tải lên : 06/03/2014, 15:20

... AUTHOR OF "EFFICIENT DEMOCRACY" AND "RURAL SANITARY ADMINISTRATION IN PENNSYLVANIA," JOINT AUTHOR OF "SCHOOL REPORTS AND SCHOOL EFFICIENCY" WITH AN INTRODUCTION BY WILLIAM T SEDGWICK PROFESSOR OF ... results are, can be determined by principals, superintendents, and students of education It is easy to understand how at the time of a fever epidemic children could be taught as much in one week ... GINN AND COMPANY · PROPRIETORS · BOSTON · U.S.A INTRODUCTION It is a common weakness of mankind to be caught by an idea and captivated by a phrase To rest therewith content and to neglect the carrying...

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Báo cáo khoa học: ATP-dependent ligases in trypanothione biosynthesis – kinetics of catalysis and inhibition by phosphinic acid pseudopeptides doc

Ngày tải lên : 07/03/2014, 04:20

... genomic DNA using the sense primer 5ÂCAT ATG GCG TCC GCT GAG CGT GTG CCG G-3Â, which includes an NdeI site (underlined) and a start codon (in bold), and the antisense primer 5Â-GGA TCC TTA CTC ATC ... involved in defence against chemical stress The pertinence of the effects caused by decreasing trypanothione content and thus increased chemical stress highlight the signicance of the biosynthetic ... 541 4 Inhibition of TryS with phosphinate An understanding of the kinetic and chemical mechanism of GspS and TryS involved in the biosynthesis of glutathionylspermidine and trypanothione is crucial...

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Báo cáo khoa học: Connection of transport and sensing by UhpC, the sensor for external glucose-6-phosphate in Escherichia coli ppt

Ngày tải lên : 08/03/2014, 08:20

... transformation of the UhpC- and UhpT-deficient E coli strains BL21(DE3) (uhpC::Tn1000 and uhpT::Tn1000, respectively) with the modified pET16b constructs was carried out according to standard protocols Determination ... R152A and R20 4C changed little with respect to the sensor values in the wild-type, the K(induction) of R15 2C decreased fivefold, that of R 14 9C increased almost 700-fold, and R31 8C became constitutive ... observed with chromosomally encoded UhpC and with plasmid-encoded UhpC with a histidine tag In both systems increasing concentrations of external Glc6P induced the Glc6P uptake system (UhpT) with...

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handling and preservation of fruits and vegetables by combined methods for rural areas potx

Ngày tải lên : 08/03/2014, 12:20

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The Theory of Money and Credit by Ludwig von Mises doc

Ngày tải lên : 15/03/2014, 07:20

... wishes to acquire one unit of each of the commodities n and o, B one unit of each of the commodities o and m, and C one unit of each of the commodities m and n Even in this case a direct exchange ... centralized disposal over the means of production Production is "anarchistic." What is to be produced, and how it is to be produced, is decided in the first place by the owners of the means of production, ... been added, and one in which the monetary theory and policy of the etatists are briefly examined In compliance with a desire of several colleagues I have also included a revised and expanded version...

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Báo cáo khoa học: Angiotensin-converting enzyme inhibition studies by natural leech inhibitors by capillary electrophoresis and competition assay doc

Ngày tải lên : 23/03/2014, 12:20

... pH 8 .4) with a total volume of 100 lL Reactions were incubated for 45 at 37 C and were terminated by addition of 1% triﬂuoroacetic acid (v/v) The internal standard FMRF-amide was added and samples ... centrifuged at 20 000 g for 10 at C Supernatants were collected and dried by speed-vac Finally, 30 lL sterile water was added on the pellet and peptides were analyzed by capillary zonal electrophoresis ... ﬁnally accumulating in the ovaries Addition of two selective inhibitors of ACE, captopril and lisinopril, to the blood meal reduced the size of the batch of eggs laid by females in a dose-dependent...

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determination of methanol and ethanol

Ngày tải lên : 26/05/2014, 17:25

... to exceed the hold-up volumes of cartridges (between 1.6 and 1.8 ml), and give a maximum sensitivity to detector responses The efficiency of recovery for the compounds was checked by a second elution ... procedures previously described The choice of the sorbents was based on their polarity, high activity grade and basic surface (basic alumina and florisil), which could enhance the interaction with ... methanol and ethanol determinations from: (a) a standard dilution; and (b) a sample collected on florisil cartridge P.A de Paula Pereira et al / Talanta 49 (1999) 245 –252 Table Calibration curves...

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the principles of light and color by edwin d babbitt (1878)

Ngày tải lên : 04/06/2014, 12:35

... Light, 41 6.—III Nature of Odic Light and Color, 41 8 —IV Warm and Cold Substances, 42 3.—V Influence of Solar and Lunar Rays, 42 4.—VI Magnetism and Odic Force, 42 6.—VII Opaque Bodies become Transparent, ... and give a brilliant effect There is a contrast of size and direction in the rocks and bold scenery as placed side by side with the placid sheet of water; and there is the contrast of the deep ... harmonic features It has contrasts of size and direction in the upper and lower head, in the front and back head, in the hair and face, in the nose and cheeks, or forehead and cheeks, or chin and checks:...

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Báo cáo hóa học: " Simultaneous measurements of kinematics and fMRI: compatibility assessment and case report on recovery evaluation of one stroke patient" potx

Ngày tải lên : 19/06/2014, 08:20

... study design, data collection and analysis, and manuscript writing; SF participated to study design, data collection and analysis, and manuscript definition; MG participated to data analysis and ... components could be affected by the static magnetic field, provoking for instance a focalization degradation, and the electrical components could be compromised by the magnetic noise Motion Capture ... the standard condition of 2.75% Mullinger and colleagues [ 34] evaluated on a phantom the effect of the conducting materials in the EEG-caps with 1.5 T acquisitions, accepting a SNR reduction of...

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báo cáo hóa học: " Use of alcohol and drugs by Norwegian employees: a pilot study using questionnaires and analysis of oral fluid" doc

Ngày tải lên : 20/06/2014, 00:20

... EtG detected in oral fluid use or drug detected in oral fluid cedures for the collection of questionnaires and samples of oral fluid, and to collect some preliminary data on alcohol and drug ... Gjerde et al Journal of Occupational Medicine and Toxicology 2010, 5:13 http://www.occup-med.com/content/5/1/13 Page of Table 1: Substances analysed and cut-off limits Substance Description Cut-off ... MDA, MDEA, MDMA (ecstacy), cocaine, THC, and 6-monoacetylmorphine Recruitment procedure "A" In some companies and for all occupational drivers, each employee was approached individually by one...

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