determination of pollutants in foods

Hollow fiber protected microextraction for the determination of pollutants in complex matrices

Ngày tải lên : 22/10/2015, 21:08

... simple to use and effective for the determination of OCPs in milk 28 CHAPTER Determination of Pollutants in Soil 4.1 Determination of polycyclic aromatic hydrocarbons in soil by hollow fiber-protected ... first introduced in segmented-flow determination[ 1] It is based on the injection of a liquid sample into a moving, nonsegmented continuous carrier stream of a suitable liquid Then the injected ... Conclusions CHAPTER DETERMINATION OF POLLUTANTS IN SOIL 27 29 4.1 DETERMINATION OF POLYCYCLIC AROMATIC HYDROCARBONS IN SOIL BY HOLLOW FIBER-PROTECTED LIQUID-PHASE MICROEXTRACTION 4.1.1 Introduction...

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Determination of EDTA in Water Samples by SPE-Gas Chromatography/Mass Spectrometry

Ngày tải lên : 05/09/2013, 10:15

... Milli-Q water and tap water at concentrations of 0.1 mg/L (1/5 of EDTA standard value in drinking water) and 0.01 mg/L (1/50 of EDTA standard value in drinking water) and subsequent extraction and ... Examination of Water Occurrence of EDTA in river water samples from three regions of Japan was examined EDTA was detected in ten of thirteen river water samples A high level of EDTA was observed in river ... Edetic acid (EDTA) in Drinking-water, Background document for development of WHO Guideline for Drinking-water Quality, 2nd ed Addendum to vol Health criteria and other supporting information, World...

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kinetic modeling of reactions in foods

Ngày tải lên : 02/04/2014, 15:04

... Boekel/Kinetic Modelling of Reactions in Foods DK3903_C000 Final Proof page i 12.11.2008 10:19pm Compositor Name: JGanesan Kinetic Modeling of Reactions in Foods Boekel/Kinetic Modelling of Reactions ... University of Guelph, Canada Boekel/Kinetic Modelling of Reactions in Foods DK3903_C000 Final Proof page iii 12.11.2008 10:19pm Compositor Name: JGanesan Kinetic Modeling of Reactions in Foods Martinus ... Boekel/Kinetic Modeling of Reactions in Foods DK3903_C001 Final Proof page 5.11.2008 6:48pm Compositor Name: VBalamugundan Kinetic Modeling of Reactions in Foods 1-2 Quality attributes (intrinsic...

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Báo cáo khoa học:Spectrophotometric Determination of Allopurinol in Tablet Formulation ppt

Ngày tải lên : 07/08/2014, 14:20

... oxidation of hypoxanthine and xanthine resulting in the production of uric acid, the product of human purine metabolism.2 In addition to block uric acid production, inhibition of xanthine oxidase ... value of n = 3.2 Determination of Allopurinol in the Pharmaceutical Formulation (Tablet ) The present study has a great potential for a sensitive and rapid determination of allopurinol in pharmaceutical ... simultaneous determination of allopurinol and oxypurinol in human serum Journal of Clinical Pharmacy and Therapeutics, 8, 229–234 Sun, X., Cao, W., Bai, X., Yang, X & Wang, E (2001) Determination of allopurinol...

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Determination of QuinoloneAntibiotics in Bovine Liver UsingAgilent SampliQ QuEChERS Kits byLC/MS/MS

Ngày tải lên : 06/10/2016, 09:27

... for the analysis of 11 quinolone antibiotics in bovine liver: pipemidic acid, ofloxacin, ciprofloxacin, danofloxacin, lomefloxacin, enrofloxacin, sarafloxacin, cinoxacin, oxolinic acid, nalidixic ... Ofloxacin Ofl i Cinoxacin Ciprofloxacin Danofloxacin Oxolinic acid N lidi i acid id Nalidixic Chemical structures of the quinolone antibiotics investigated in this study Lomefloxacin Flumequine Fl ... Lomefloxacin, Enrofloxacin, Sarafloxacin, Cinoxacin, Oxolinoc acid, 10 Nalidixic acid, 11 Flumequine Linearity and limit of quantification (LOQ) Table The linear calibration range for all of the quinolone...

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Tài liệu Risk Characterization, Assessment, and Management of Organic Pollutants in Beneficially Used Residual Products pdf

Ngày tải lên : 14/02/2014, 03:20

... the incorporation of multiple conservative assumptions in deterministic risk assessment It is not intended to judge the validity of the assumptions In 1998, the State of Wisconsin began developing ... typically in the range of one in ten thousand to one in one million additional cases A case study from the State of Wisconsin illustrates the effect of multiple conservative assumptions in a deterministic ... sample Each cleanup step is intended to eliminate interfering compounds by using physical or chemical properties that differ between interfering compounds and the analyte of interest The analytical...

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Báo cáo khoa học: Kinetic and mechanistic characterization of Mycobacterium tuberculosis glutamyl–tRNA synthetase and determination of its oligomeric structure in solution pptx

Ngày tải lên : 07/03/2014, 03:20

... exceptions in that activation of the amino acid requires the presence of the cognate tRNA [2,4] In these aaRS the binding of tRNA induces an ATP productive binding mode [5] GluRS are also distinguished ... the discriminating behaviour of Mt-GluRS in E coli Studies on Tt-GluRS indicated that discriminating and nondiscriminating GluRS can be distinguished on the basis of the presence of a specic ... of [32P]ATP was observed In kinetic experiments, the rate of formation of [32P]ATP increased at increasing concentrations of [32P]PPi (Fig 4) As expected from the observed inhibitory effect of...

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DETERMINATION OF VOLATILE ORGANIC COMPOUNDS (VOC) IN CONSUMER PRODUCTS AND REACTIVE ORGANIC COMPOUNDS IN AEROSOL COATING PRODUCTS doc

Ngày tải lên : 14/03/2014, 20:20

... determine the final VOC content for the product Method 310 is also used to determine the percent by weight of the ROCs contained in aerosol coating products, for the purpose of determining compliance ... provided in section 7.0 3.3.3 Determination of ammonium content using ASTM D 1426-98 or US EPA Method 300.7 3.3.4 Determination of ketones and alcohol content using NIOSH Method 1400 3.3.5 Analysis of ... analysis of samples to determine the weight percent of total volatile material, using US EPA Reference Methods 24/24A, ASTM D 2369-01 5.3.2 Determination of sample water content For determination of...

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Báo cáo "DETERMINATION SULPHONAMIDES RESIDUES IN FOOD BY HIGH PERFOPvMANCE LIQUID CHROMATOGRAPHY PART 2. SEPARATION AND QUANTIFICATION SULFAGUANIDINE, SULFAMETHOXYPYRIDINE, SULFADOXINE AND SULFAMETHOXAZONE IN ANIMAL FOODSTUFFS AND FOOD PRODUCTS " pdf

Ngày tải lên : 20/03/2014, 21:20

... Marcel Dckker Inc 2000 pp 621-693 Ivan Pecorelli, Rita Bibi, Laura Fioroni, Roberta Galarini - Validation of a confirmatorymethod for determination of sulphonamides in muscle according to the European ... LIEU THAM KHAO Chu Dinh Binh, Nguyen Phuong Thanh, Nguyin Thj Anh Nguyet, Pham Luan - Xac djnh du lugng khang khuin thuc phim bing phuang phap sac ki Idng hieu nang cao (HPLC), Phin Toi uu boa cac ... che sir dung san xuat, kinh doanh thuy san, Quyet djnh so 07/2005/QD-BTS 22/02/2005 ciia Bd Thuy san Ming-Ren S Fuh, Su-Yi Chu - Quantitative determination of sulfonamide in meat by solid-phase...

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DETERMINATION OF ORGANIC COMPOUNDS IN DRINKING WATER BY LIQUID-SOLID EXTRACTION AND CAPILLARY COLUMN GAS CHROMATOGRAPHY/MASS SPECTROMETRY pdf

Ngày tải lên : 22/03/2014, 14:20

... provides procedures for determination of organic compounds in finished drinking water, source water, or drinking water in any treatment stage The method is applicable to a wide range of organic compounds ... surrogate in µg/L in the water sample Ax = integrated abundance of the quantitation ion of the analyte in the sample Ais = integrated abundance of the quantitation ion of the internal standard in the ... tune and initial calibration at the beginning of each 12-hour work shift during which analyses are performed using the following procedure 10.3.1 Inject a µL aliquot of the ng/µL solution of DFTPP,...

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Đề tài " Determination of the algebraic relations among special Γ-values in positive characteristic " pdf

Ngày tải lên : 22/03/2014, 16:20

... develop a new method ¯ for detecting k-linear independence of sets of numbers in k∞ , culminating in a quite easily stated criterion Let t be a variable independent of T Given f = qn i ∞ ∞ i (n) ... -completion of k an algebraic closure of k∞ the | · |∞ -completion of k∞ the algebraic closure of k in C∞ ¯ a ﬁxed choice in k of a (q − 1)st root of −T the subring of the power series ring C∞ [[t]] ... consisting of power series convergent in the “closed” unit disc |t|∞ ≤ the cardinality of a set S the set of r by s matrices with entries in a ring or module R the group of units of a ring R with...

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Báo cáo khoa học: Determination of the reopening temperature of a DNA hairpin structure in vitro pptx

Ngày tải lên : 23/03/2014, 13:20

... used as the sequencing primer Determination of the hairpin reopening temperature Oligonucleotide primer was mixed with single-stranded template DNA at a ratio of : in the annealing buffer This mixture ... Experimental rationale In order to determine the reopening temperature of an individual secondary structure in a single DNA molecule (Fig 1A,B), knowledge of DNA replication, DNA folding and oligonucleotide-mediated ... hairpin-forming region (as indicated in Fig 1A) can indeed affect primer DNA primer extension, most likely due to hairpin structure formation (Fig 1B) Measuring the reopening temperature for a single...

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Review of the Existing Techniques for the Determination of Dry Rubber Content in Natural potx

Ngày tải lên : 23/03/2014, 21:21

... discussion of the results are included in chapter five of this thesis Finally, in chapter six the summary and general conclusions of the work including scope for doing further work in the area are incorporated ... ORC of latex by measuring the capacitance of latex using capacitive techniques 1.6: Shortcomings of the existing methods Rapid determination of ORC is very important for commercial exchange of ... system often shows erratic readings owing to the presence of adulterants and due to ionic activity in the latex 1.7: Outline of the work presented in this thesis In this thesis, results of our...

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Báo cáo khoa học: " Determination of Syntactic Functions in Estonian Constraint Grammar " docx

Ngày tải lên : 24/03/2014, 03:21

... decreasing the error rate and using statistical analysis for generating new rules References Timo J~irvinen 1994 Annotating 200 Million Words: The Bank of English Project In Proceedings of COLING-94 ... errors occurred during determination of apposition and the third biggest group of errors exists in sentences there one clause divides the other into two parts In experiment A, 86-88% of words become ... (except finite verbs and conjunctions) Results To evaluate the performance of parser I use two types of corpora Training corpus is used for formulating rules and preliminary testing After testing...

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Water Pollution: Impact of Pollutants and New Promising Techniques in Purification Process doc

Ngày tải lên : 29/03/2014, 21:20

... manufacturing (ii) power-generating (iii) mining and construction, and (iv) food processing industries (Mc Kinney and Schoch 2003) Manufacturing industries like chemical, oil refining, steel ... uranium mining and enrichment plants (Rao 2001) The mining and construction industries are major contributors of sediment and acid drainage There are basically four main types of mining impacts ... boiling or placing hot metal instruments in water before drinking it to filtering that water through crude sand or charcoal filters These writings suggest that the major motive in purifying water...

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Báo cáo khóa học: Determination of modulation of ligand properties of synthetic complex-type biantennary N-glycans by introduction of bisecting GlcNAc in silico, in vitro and in vivo pot

Ngày tải lên : 30/03/2014, 13:20

... signal of binding of the fluorescent probe is given as extent of carbohydrate-ligand-dependent binding by subtracting carbohydrate-independent binding from total binding for each cell line BiB10-BSA ... avoided In the solid-phase assay, saturable and carbohydrate-dependent binding was measured, and the resulting Scatchard plots gave straight lines indicating the presence of a single class of binding ... neoglycoprotein and biotin-independent binding of the second-step reagent was subtracted from the results to determine the level of specific (glycan-dependent) binding Having confirmed the validity of the...

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Báo cáo khoa học: Determination of the metal ion dependence and substrate speciﬁcity of a hydratase involved in the degradation pathway of biphenyl/chlorobiphenyl pot

Ngày tải lên : 30/03/2014, 15:20

... quantitation of microgram quantities of protein utilizing the principle of protein-dye binding Anal Biochem 72, 248–254 Laemmli UK (1970) Cleavage of structural proteins during the assembly of the head of ... provide insight regarding the mechanism, the substrate binding site and the role of the metal cofactor in the enzyme Results Cloning, expression and puriﬁcation of BphH The bphH gene was inserted into ... degradation of a wide range of aromatic pollutants reaction contain 10 ng of template pDD5301 [10], 0.8 units of Pfx polymerase (Invitrogen), 20 nm amounts of each dNTP and 100 pmol of each primer in...

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applications of biotechnology in traditional fermented foods by panel on the applications of biotechnology

Ngày tải lên : 02/04/2014, 15:02

... president of the National Academy of Engineering The Institute of Medicine was established in 1970 by the National Academy of Sciences to secure the services of eminent members of appropriate professions ... (1) In technologically developed regions, the crafts of baking, brewing, wine making, and dairying have evolved into the large-scale industrial production of fermented consumer goods, including ... products, and finally prepare the finished product for distribution and sale by preservation and/or packaging One might think of sorting, grading, cleaning, disinfection, grinding, or packaging The...

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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

... immunoassay kit to determine inflammatory marker in EBC Il'Yasova et al [18] report about a method comparison of the determination of an isoprostane derivative in urine using GC/MS and ELISA With ... determinations of inflammatory markers which serve as biological marker, differentiating between increased concentration levels in patients from lower endogenous concentration levels in EBC in ... performed in ammonium acetate buffer 10 mM Thus, calibration curves were obtained by spiking increased amounts of analytes in mM ammoniumacetate and in pooled EBC All calibration curves obtained in...

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Báo cáo hóa học: " Analysis of in vitro replicated human hepatitis C virus (HCV) for the determination of genotypes and quasispecies" docx

Ngày tải lên : 20/06/2014, 02:20

... there is only one type of infectious and replicating HCV The variety of HCV RNA in patients could result from changes induced in the plasma/sera, including the production of noninfectious viruses ... which cell types are critical for inducing maladies in patients, that point will remain debatable and vary with the point of view of the investigator HIV-1 and Epstein-Barr virus (EBV) are excellent ... to new cells of Impact of long-term in vitro cell culture on the fidelity of replication of HCV We tested the impact of long-term in vitro culturing on CIMM-HCV sequences Samples of PCLB-T4a and...

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