current analytical methods for the determination of methylxanthines in foods
comparison of the methods for the determination of surface acidity of solid catalysts
... from the quantity of water formed during the reaction The fraction of the various forms of hydrogen can be determined from the ratios of the areas of the corresponding peaks The technique, implying ... the difficulty of determining the exact end point of titration and to the presence of traces of moisture Other disadvantages a r e the impossibility of making determinations in the real working ... The combination of the information obtainable from two o r more of them can often be the only way to give a complete picture of the surface acid properties of the solid under examination 11 DETERMINATION...
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Báo cáo khoa học: "Comparison of Diagnostic Methods for the Detection of Parasites in Fish" pdf
... Comparison of Diagnostic Methods for the Detection of Parasites in Fish and disadvantages, depending on the purpose and target of study For parasitological investigation, the classical methods (the ... microscope Stretching of these metacercariae was done by hot formalin for two minutes Then, they were kept in Eppendorf tubes with neutral formalin (4%) Diagnosis of parasitic infections * Diagnosis ... saline pH 7.0) The internal organs were exposed after a vertical incision was made from the anal opening to the Before any dissection, the exterior of the fish was observed under the dissecting...
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Hollow fiber protected microextraction for the determination of pollutants in complex matrices
... for the determination of such compounds in milk The experimental results demonstrate that the procedure is simple to use and effective for the determination of OCPs in milk 28 CHAPTER Determination ... efficiencies of the sample extraction and clean up steps are becoming increasingly significant in restraining detection limits of analytical methods[ 2] In the last decade or so, there have renewed interests ... 0.744µg/g for all tested PAHs in soil The hollow fiber-protected LPME coupled with GC-MS was developed for the determination of chlorobenzenes in soil The linear calibration curves were obtained in the...
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Analytical methods for the performance evaluation and improvement of multiple part type manufacturing systems
... to the differences in processing capacity and the variability of the manual operation 1.2 Thesis Outline In the following chapter, the state of art in the analytical modeling of multiple part-type ... are not included in the scope of this thesis The author shall however, discuss the extension of the model to include quality issues in the future work of Chapter The performance measures of a production ... significant proportion of this thesis is dedicated to the formulation of methodologies for evaluating the performance of the first category of systems These methodologies take into account the various characteristics...
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Comparison of Methods for the Extraction of Bioflocculants from Activated Sludge
... of 95 ml) The A280 to A260 ratio of the UV-absorbing peak indicated it was composed mainly of nucleic acid In the profile of the NaOH-extracted polymer (B), the elution volume (80 ml) of saccharide ... shaking, absorbance at 660 nm (A660) was measured for min, and the relative A660 against the control test was calculated every minute using the following formula: The relative A660 = A660 of flocculating ... corresponded to that of the UV-absorbing peak In this case, the UV-absorbing peak was mainly protein These results agreed well with analytical data of the polymer components shown in Table Conclusions...
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Báo cáo khoa học: A novel metallobridged bis(b-cyclodextrin)s fluorescent probe for the determination of glutathione doc
... if the amount of buffer is excessive, the ionic strength is too great, which inuences the uorescence intensity Therefore, the inuence of the volume of buffer was measured Because the volume of ... remained constant for at least h Hence, the reaction was left to proceed for 10 min, and the uorescence was then measured at room temperature Inuence of interference The inuence of the main constituents ... concentration of increased, the uorescence intensity of the system also increased slightly We therefore used 2.00 mL of 2.00 ã 10)4 molặL)1 metallobridged bis(bCD)s Inuence of reaction time The effect of...
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Review of the Existing Techniques for the Determination of Dry Rubber Content in Natural potx
... 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 ... immersed in the latex and allowed to come to rest without touching the side of the cylinder The reading on stem is noted The ORC of the latex is obtained by multiplying the reading by three (since ... formulated in Travancore during 1860s and subsequently in Cochin for the distribution of forest and wasteland for plantation crops were instrumental for the initial growth and expansion'l", In terms of...
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nmr methods for the investigation of structure and transport
... spins By linearity of the Fourier transform the direct relation between the peak integral and the number of spins of the corresponding chemical group holds for the spectrum of superposed lines ... real, the oscillating imaginary part of the sum in general leads to a small imaginary part of Qn The maximum of the real part of the sum is N times higher than the amplitude of the oscillating ... /: (2.47) For n D N=2 the origin is such that QN=2 is dominated by r/ in the vicinity of the right boundary of the FOV Still for a rather coarse discretization of N D 32 the corresponding sum is...
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báo cáo hóa học: " The evolution of methods for the capture of human movement leading to markerless motion capture for biomechanical applications" pptx
... improving the efficiency of troop movement During the 1950s there was a need for an improved understanding of locomotion for the treatment of World War II veterans The classic work at the University of ... skin The movement of the markers is typically used to infer the underlying relative movement between two adjacent segments (e.g knee joint) with the goal of precisely defining the movement of the ... optimal weighting of the markers according to their degree of deformation Another extension of the basic PCT corrects for error induced by segment deformation associated with skin marker movement...
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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
... probable that 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 ... is, therefore, well suited for studying the biology and immunology of HCV infections It is also an excellent system for testing the efficacy of candidate drugs and advancing ideas for vaccines Methods ... 203, while the variation in the control sequences were greater for the rest of the 5'UTR In order to determine if changes in our isolates were consistent with the current 2D model of the 5'UTR...
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Báo cáo hóa học: " An analytical model for the intercell interference power in the downlink of wireless cellular networks" ppt
... non-uniform partitioning (J = 3, P = 9): (a) non-uniform partitioning of the [0, 1] segment; (b) uniform partitioning of interval I2 following procedure: for each of the JN combinations of NP-point ... values In order to take into account the ignorance of the contribution of the highest interference gains of the N - M non-compelled interfering links in the probability set {δ j }, we suggest the ... compare the approximation of G given by (6) with the ‘exact’ formula (3) Then, in Section IV-B, we obtain the histogram of the interference gain Gn (one single interferer) by applying the non-uniform...
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Cocoa Processing Methods for the Production of High Quality Cocoa in Vietnam ppt
... assistance in providing information regarding the cocoa industry in Vietnam and in the establishment of solar driers and fermenting boxes at their demonstration farm sites in Ben Tre Province HARVESTING ... darken in colour during drying as the majority of browning reactions will occur during this process DRYING OF COCOA Drying of cocoa is an important step in cocoa processing as some of the reactions ... on the percentage of fully brown beans in the cut test 6: The effect of spreading of beans for two hours, prior to placement in boxes, on fermentation temperatures 7: The effect of spreading of...
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Standard Methods for the Examination of Water and Wastewater P4. end
... buffer solutions in the pH range of to The error resulting from inaccurate pH measurements grows with an increase in total alkalinity For example, an inaccuracy of 0.1 in the pH determination causes ... ZABBAN 1952 Analytical methods for the determination of cyanates in plating wastes Plating 39:381 23 GARDNER, D.C 1956 The colorimetric determination of cyanates in effluents Plating 43:743 24 ... error in the low boron range This interference springs from the insolubility of the hardness salts in 95% ethanol and consequent turbidity in the final solution Filter the final solution or pass the...
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Standard Methods for the Examination of Water and Wastewater P3
... to margin; short spines often present around margin (valve view) 31b Area of prominent radial markings, in valve view, limited to Cyclotella approximately outer half of circle, marginal spines ... Standard Methods for the Examination of Water and Wastewater Agency, National Environmental Research Center, Cincinnati, Ohio PATRICK, R & C.W REIMER 1975 The Diatoms of the United States Exclusive of ... Water Environment Federation Standard Methods for the Examination of Water and Wastewater Algae General TAYLOR, W.R 1957 Marine Algae of the Northeastern Coast of North America, 2nd ed Univ Michigan...
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Standard Methods for the Examination of Water and Wastewater P2
... of Water and Wastewater Dinobryon © Copyright 1999 by American Public Health Association, American Water Works Association, Water Environment Federation Standard Methods for the Examination of ... Methods for the Examination of Water and Wastewater Pandorina © Copyright 1999 by American Public Health Association, American Water Works Association, Water Environment Federation Standard Methods ... for the Examination of Water and Wastewater Peridinium © Copyright 1999 by American Public Health Association, American Water Works Association, Water Environment Federation Standard Methods for...
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Standard Methods for the Examination of Water and Wastewater P1
... atomic weights of many elements are not invariant but depend on the origin and treatment of the material The standard values of Ar(E) and the uncertainties (in parentheses, following the © Copyright ... educational and technical information programs, AWWA promotes the improvement of the quality and quantity of the drinking water supply Contact information: AWWA 6666 West Quincy Avenue Denver, CO ... precipitate by keeping solution at the boiling point for a few hours in a hot water bath or by letting particles settle for at least 48 h in an alkali-resistant container (wax-lined or polyethylene)...
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Báo cáo khoa học: " Effective methods for the production of immunoglobulin Y using immunogens of Bordetella bronchiseptica , Pasteurella multocida and Actinobacillus pleuropneumoniae" docx
... stopping of the reaction with M HCl solution Laying rates The laying rate in each experimental group was calculated by dividing the total number of eggs by accumulated number of hens during days of ... was denatured in sample buffer by incubation at 100℃ for The 20 ml of the sample were applied in 12% polyacrylamide gel at 80 V for hr Protein bands were visualized by staining the gel with 0.1%(w/v) ... was lower than in the other groups in case of using IROMP as a coating antigen (Fig 5) Earliest immune response in egg yolks was observed in group (Fig 5) There was no difference in the antibody...
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Báo cáo khoa học: " Comparison of two sap flow methods for the estimation of tree transpiration" ppt
... in figure Respective functioning of each method was not deteriorated by the other The relationship obtained with the comparison of the two methods over the whole period (n 589) is presented in ... transpiration in the morning This study confirmed the possibility of experiment one or the other method in accordance with the objectives, and the equipment The major problem is still the choice of samples ... required for an accurate estimation of transpiration The combination of the two methods seems possible in the same experiment The heat balance for the small trunks, and transpiration calculation for...
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Báo cáo sinh học: "Use of sib-pair linkage methods for the estimation of the genetic variance at a quantitative trait locus" pps
... estimator of the QTL variance Whether the bias on the size of the biasing factor not, it depends in the range of realistic values for O t shows the value ofk as a function of for different values of ... (1992) found that the use of fully informative matings can increase the power of the Haseman-Elston test for a given number of genotypings Consequently, only these matings were used in the calculations ... number of genotypings If many markers are to be examined, the parents will only be informative for a fraction of the markers Since the major costs in the given design arise from the typing of progeny,...
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báo cáo khoa học: " Whole-Organ analysis of calcium behaviour in the developing pistil of olive (Olea europaea L.) as a tool for the determination of key events in sexual plant " ppsx
... reproductive organs The presence of the dye inside the cells of the olive pistil indicates the following: (1) The amount of dye solution used was sufficient to penetrate the tissues of the inflorescence ... factors Furthermore, at this stage, the main task of the flower bud is to complete the growth and maturation of anthers and the pistil Consequently, the intensity of the signalling events in the stigma ... anthers (A) In the longitudinally cut style, accumulation of green fluorescence is present in the area of the transmitting tract (B) In the lower style and ovary, the labelling is located in the...
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Tìm thêm: xác định các nguyên tắc biên soạn khảo sát các chuẩn giảng dạy tiếng nhật từ góc độ lí thuyết và thực tiễn khảo sát chương trình đào tạo gắn với các giáo trình cụ thể điều tra với đối tượng sinh viên học tiếng nhật không chuyên ngữ1 khảo sát thực tế giảng dạy tiếng nhật không chuyên ngữ tại việt nam khảo sát các chương trình đào tạo theo những bộ giáo trình tiêu biểu nội dung cụ thể cho từng kĩ năng ở từng cấp độ xác định mức độ đáp ứng về văn hoá và chuyên môn trong ct mở máy động cơ lồng sóc mở máy động cơ rôto dây quấn các đặc tính của động cơ điện không đồng bộ đặc tuyến hiệu suất h fi p2 đặc tuyến mômen quay m fi p2 đặc tuyến tốc độ rôto n fi p2 động cơ điện không đồng bộ một pha sự cần thiết phải đầu tư xây dựng nhà máy thông tin liên lạc và các dịch vụ phần 3 giới thiệu nguyên liệu từ bảng 3 1 ta thấy ngoài hai thành phần chủ yếu và chiếm tỷ lệ cao nhất là tinh bột và cacbonhydrat trong hạt gạo tẻ còn chứa đường cellulose hemicellulose chỉ tiêu chất lượng 9 tr 25