shaking method project iso 11264

... simple liquid extraction method based on the use of about ml of organic solvent was reported Subsequently, based on this liquid extraction method, Murray et al [35] described a method termed as solvent ... system to increase the amount of sample and therefore method sensitivity [36, 37] There is a similar solvent microextraction method in EPA standard methodologies [8] to analyze organochlorine pesticides ... extraction process Hence the precision and stability of the methods are increased significantly Also, sample clean-up is possible by using this method because of the selectivity of the hollow fiber...

Ngày tải lên: 17/09/2015, 17:20

... observable degradation under the optimum MAE and SFE conditions, except for propham From the comparison of both methods, it was found that although higher recoveries were obtained by MAE, recoveries by ... respective optimum MAE conditions ranged from 85% to 87% with good reproducibility The conjugate of 2-isopropoxyphenol occurred in all tested biological samples under the applied MAE conditions and...

Ngày tải lên: 16/09/2015, 17:13

... eight carbamate pesticides (isoprocarb, metocarb, fenobucarb, xylylcarb, XMC, ethiofencarb, propoxur, and carbaryl) in blood from patients suffering from acute poisoning [12] In addition, liquid-liquid ... obtained in all tested samples, whereas the recovery of 2isopropoxyphenol was low (~70%), possibly owing to conjugation with glucuronide to form 2-isopropoxyphenol-glucuronide, which cannot be detected ... studies reported that more than 75% of 2-isopropoxyphenol could be found in its conjugated form, probably as glucuronide in tested living bodies, the 2-isopropoxyphenol conjugation in this study...

Ngày tải lên: 16/09/2015, 17:13

... carbamates in soil and the results compared Fig 4-8 shows the comparison of analyte recoveries obtained from both extraction methods Tested carbamates in this figure, from left to right, are in ... 4-9 Comparison of extraction efficiencies of carbamates from freshly spiked soil and time-aged soil by MAE and SFE 113 120 Recovery (%) 100 80 MAE 60 SFE 40 20 Analyte Fig 4-10 Comparison of mean ... degradation under the optimum MAE and SFE conditions, except for 114 propham From the comparison of both methods, it is found that although higher recoveries were obtained by MAE, recoveries by...

Ngày tải lên: 16/09/2015, 17:13

... and its TPs from the water samples because of the efficiency and simplicity of this extraction method A 100-ml sample was firstly adjusted to pH 3, and then transferred to a 250-ml separating ... the propoxur TPs 54 3.3 RESULTS AND DISCUSSION 3.3.1 Identification of TPs of Propoxur and Comparison of ESI and APCI The results showed that under alkaline condition (0.5M NaOH), propoxur was ... formamide as the base 55 peak ([M+H]+) was obtained at m/z 60 by both mass techniques The other TP was 2isopropoxyphenol, for which the most intense [M-H]- ion was at m/z 151 obtained by APCI Based on...

Ngày tải lên: 16/09/2015, 17:13

Ngày tải lên: 16/09/2015, 17:13

... thermal disorder is restored which results in thermal energy being released At 2450 MHz (the frequency used in commercial systems), alignment of the molecules followed by their return to disorder ... extraction method 91 OCPs, Triazines, etc Spiked soil sample Hexane– acetone (1:1) 115 10 85-125 - 86 Triazines Freshly spiked and aged soils DCM– Methanol (9:1) 115 20 89-103 Conventional extraction method ... Information on selected LC-MS methods for the residue analysis of pesticides in solid matrices published after 1997 is summarized in Table 1-6 [133-145] In comparison to water samples, LC–MS seems...

Ngày tải lên: 16/09/2015, 17:13

... my most sincere gratitude and appreciation to my supervisor, Professor Sam Fong Yau Li, for his guidance, support and patience though this project I wish to extend my thanks to all the kind staff ... Spectrometry (CE-MS) method Nonaqueous Capillary Electrophoresis (NACE) was applied for the separation of alkaloids To improve the detection limits of alkaloids, a Transient Isotachophoresis (tITP) ... electrophoresis has become one of the most exciting and useful separation methods so far It differs from other separation methods, such as Gas Chromatography (GC) or HPLC, in that it uses different...

Ngày tải lên: 11/09/2015, 14:27

Ngày tải lên: 17/02/2014, 20:20

... grammar of noun, verb and adjective definitions [Ahlswede, 1988], based on the Linguistic Siring Project' s full English grammar [Sager, 1981], and using the LSP's full set of resources, including ... cause of failure is the inability of the grammar to deal with all the nuances of adjective comparison: The total number of triples generated was 51,115 and the number of unique triples was 25,178 ... references in definitions and reduce them to triples Our next essay in the text processing/editing method began as a casual experiment We extracted the set of intransitive verb definitions, suspecting...

Ngày tải lên: 08/03/2014, 18:20

... sequence While the first method is preferable insofar as it would allow the detection of novel sequences and highly diverged regions between the target species and any comparison genome, recent studies ... the analysis: the identification of Neandertal sequences The Mega BLAST method, used in this step, is intended for the comparison of longer, closely related sequences [24] and will inevitably fail ... alignment, this method of divergence triangulation has a number of advantages As described above, misread bases in ancient DNA will lead to an overestimate of divergence in a pairwise comparison However,...

Ngày tải lên: 09/08/2014, 20:22

... in Theorem 2.3, and β(y) α(x) f (s, t) dsdt H(x, y) = J(a(x, y)) + 0 Remark 7: we note that the methods in [1-12] are not available for the estimate of bound for the solution of Equation 48 Acknowledgements...

Ngày tải lên: 21/06/2014, 01:20

... great number of our political prisoners detained at Yen Bai and Cao Bang”, the President can say “they fled and then massacred a great number of our political prisoners detained at Yen Bai and ... French colonialists of having a lot of prisons From that, their real face is exposed: the so-called civilizing mission of the French is really “building more prisons than schools” 3.2.1.6 Quantifiers: ... out of the study’s focus Even within the types of presupposition, only a few ones are discussed Methods of the Study - Collecting the data and materials - Reviewing related theories -Analyzing...

Ngày tải lên: 14/12/2013, 00:41

... school, Hà Tĩnh province Method of the study In this study, the writer used the methods below: - Investigating method - Contrastive analysis - Analytic and synthetic - Descriptive method Design of the ... IntRoduction Rationale of the study Aims of the study Subjects of the study Scope of the study Method of the study Design of the study Part II: Content Chapter I: Literature review 1.1 The overview ... to improve the quality of teaching and learning this subject Textbooks have been renovated, new methods have been applied and various aspects of teaching English have been covered Realized that...

Ngày tải lên: 18/12/2013, 10:04

... Halliday - Analytic and systematic method - Quanlitative method is used most of the time for a sufficient theoretical background, in combination with quantitative method to analyze some types of ... study with a firm foundation Chapter describes the method with which we this research (Beside the quantitative method, qualitative research method is used most of the time) Chapter is considered ... rationale, aims, scope, methods and design of the study Part 2: Development This part is subdivided into three chapters: Chapter 1: Theoretical background Chapter 2: Methodology Chapter 3: The...

Ngày tải lên: 22/12/2013, 12:59

... photometrically by changes in the concentration of the reduced cosubstrate NADPH For isomerization of fructose 6-phosphate, phosphoglucoisomerase was added 516 Mathematical modelling, parameter identification ... enzymes in central carbohydrate metabolism during cold exposure (A–C) Vmax values of three invertase isoforms: vInv, nInv and eInv (D) Vmax of SPS (E, F) Vmax values of FrcK and GlcK Significant differences ... estimated kinetic parameters Identified values of Vmax matched the values from experiments, and comparison of identified Km and Ki values agreed with values from the literature (Table 1) Rate constants...

Ngày tải lên: 14/02/2014, 22:20

... throughout in the world as a result of this incident Architectural methods were also influenced, and the highly airtight construction method became common Urea formaldehyde resin was introduced and ... (PCs), and may influence indoor air quality.79) Xylene is aromatic hydrocarbon isomer which exists as ortho-, meta-, and para-isomers of dimethyl benzene, and is used as a solvent and in printing ink.80) ... clinical range for attention problems, attention-deficit/hyperactivity disorder (ADHD) problems, and pervasive developmental disorder (PDD) problems at age 3.88) Metabolites of chlorpyrifos were...

Ngày tải lên: 17/02/2014, 22:20

... between the restorative capacity of a place and the aesthetic attributes selected in this study METHOD Participants The sample consisted of 132 university students (72 women and 59 men, average...

Ngày tải lên: 19/02/2014, 17:20

... allembracing level A project EIA deals, for example, first with the question how a project or an activity shall be worked out, while a SEA concentrates on the questions if various projects are suitable ... southeast of Thailand and to compare the most common shrimp farming method in Thailand with two other, hopefully more sustainable, methods This was done by making a Strategic Environmental Assessment ... report can hopefully also be used to facilitate and improve the EIA-process for project directors and consultants 1.2 Methodology The study includes interviews with shrimp farmers and with expertise...

Ngày tải lên: 26/02/2014, 20:20