hptlc determination of artemisinin and its derivatives in bulk and pharmaceutical dosage
JOURNAL OF CHROMATOGRAPHY LIBRARY - VOLUME 24 chemical methods in gas chromatography
Ngày tải lên :
06/10/2016, 09:25
... anhydride in A and C A, Analysis of protein amino acids; B, some biologically interesting amino acids; C, some amino acids in the presence of protein amino acids A: ALA = alanine; GLY = glycine; VAL ... identification and group determination of components in complex mixtures of compounds, to improve separation and to enhance the sensitivity and, in some instances, the accuracy of determination of sample ... 9.5.3 Determination of main oxygen-containing groups 9.5.4 Determination of some sulphur-containing groups 9.5.5 Determination of alkoxy groups...
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mathematical methods of engineering analysis - e. cinlar, r. vanderbei
Ngày tải lên :
31/03/2014, 15:21
... countable in nity of elements In particular, N is countable So are Z, N × N in view of exercises 2.3 and 2.4 Note that an in nite set can have the same cardinality as one of its proper subsets For instance, ... compactness and convergence 11.5 DEFINITION A point x in E is called a cluster point of a subset A of E provided that every open ball centered at x contains in nitely many points of A 11.6 THEOREM ... finte number of them that cover C and, therefore, A Since each one of those finitely many balls has a finte number of points of A, the total number of points in A must be finite The following is the...
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MATRIX METHODS OF CIRCULAR ANALYSIS
Ngày tải lên :
08/04/2014, 11:28
... principle of superposition: Fix the beam at its nodes and determine the end furing forces, as shown in the following figure at (a) and (b) and as calculated below The beam in condition (1) is not in ... Element 2-3 Substitutingv,, e,, v, ando, into equations (23.70 )and (23.72) ,and remembering that the first node is node and the second node is node 3, the following is obtained for M, and M,: = M, -1.152 ... which in this case is u , and u2 {R} = a vector of reactions corresponding to the constrained displacements, which in this case is u3 [K,J in this case = WI21= [o - E2 I , ] [ -i E2 / Expanding...
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methods of behavior analysis in neuroscience - jerry j. buccafusco
Ngày tải lên :
08/04/2014, 12:37
... presenting and grooming This preoccupation with presenting and grooming by the stump-tailed monkeys resulted in lower scores in the remaining behavioral categories The reports of Kling and Orbach51 ... impaired in ability to perform learning and memory-related tasks and exhibit a decrease in the expression and nicotine-stimulated function of brain nicotinic acetylcholine receptors These cholinergic ... to learning performance.26,27 H Flinders Sensitive Line and Flinders Resistant Line The Flinders Sensitive Line (FSL) and the Flinders Resistant Line (FRL) were selectively bred at Flinders University,...
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Statistical Methods of Valuation and Risk Assessment: Empirical Analysis of Equity Markets and Hedge Fund Strategies
Ngày tải lên :
16/04/2013, 20:00
... 49 -3- Introduction Much of the financial decision making by financial institutions is focuses on risk management Measuring risk and analysing ways of controlling and allocating it require ... individuals and institutions desiring to make investment decisions involving hedge funds A detailed analysis of hedge fund risks and returns is also important from the standpoint of asset pricing theory ... - Index and the Goldman Sachs Commodity Index We also include CSFB High Yield index to incorporate returns available from investing in high yield securities Finally we include the volatility index...
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trace analysis technology of nenophenyl in wastewater analysis by GCMS
Ngày tải lên :
16/03/2014, 18:11
... method was examined in terms of its practicability for the determination of the three components in the sewage in uents and effluents of wetland plants In addition, the applicability of the SPME–GC– ... occurs mainly in domestic sewage The ethinyl group in position 17 inhibits the metabolism of EE and is thus detectable in surface water [5] Reliable methods are required for the trace detection of ... for t-NP and BPA and 2% for EE, and was completely prevented by keeping the fibre in the PTV-injector (split mode) for The LODs determined in pure water and wastewater samples (effluent and model...
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Methods of analysis of food components and additives
Ngày tải lên :
23/05/2014, 12:30
... cell cell determination of tota l parameters: determination of total parameters: V OC, POC, V OX POX VOC, POC, VOX, ,POX individual determination of compound s individual determination of compounds ... retention trap, narrowing chromatographic bands of the analytes The sample volume during fast injection spreads in the column inlet, flooding it and causing “band broadening in the space,” so it ... science, engineering, and food chemistry, to name a few) interested in obtaining a stronger background in analysis, and all those involved in the analysis of both food components and food additives...
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direct methods for stability analysis of electric power systems theoretical foundation, bcu methodologies, and applications
Ngày tải lên :
30/05/2014, 23:38
... Indeed, the problem of determining stability regions (regions of attraction) of nonlinear dynamical systems is of fundamental importance for many disciplines in engineering and in the sciences (Athay ... called an invariant set of Equation 3.1 if every trajectory of Equation 3.1 starting in M remains in M for all t A point p is said to be in the ωlimit set of x if, corresponding to each ε > and T ... operating conditions and the dynamic study period of each contingency This off-line practice is inadequate to deal with current operating environments and calls for online evaluations of the...
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Báo cáo nghiên cứu khoa học: " EXPERIMENTAL AND THEORETICAL ANALYSIS OF A CRITICAL CHEMICAL REACTION: DECOMPOSITION OF HYDROGEN PEROXIDE (H2O2)" potx
Ngày tải lên :
22/07/2014, 03:20
... regarding safety aspects 2.2 Kinetics of the decomposition of hydrogen peroxide In the case of the decomposition of hydrogen peroxide, the reaction is regarded as irreversible, since one of the ... change in kinetics and potential energies, and that all heat fluxes and the shaft work are zero except for the heat fluxes respective to the reaction and to the cooling d (ρVr H ) & & & & = Vin ρHin ... performed are summarized in table (1) The influences of hydrogen peroxide and catalyst concentration and of the initial temperature of the reactor on the reaction rate and the heat flow behavior...
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Báo cáo vật lý: "Analysis of Trace Elements in Teeth by ICP-MS: Implications for Caries" pptx
Ngày tải lên :
07/08/2014, 14:20
... techniques, including the use of microprobes Our results indicate that trace elements are systematically but inhomogeneously distributed within the enamel and dentine of teeth.10 Sources of Cd include ... smelting, and disposal of metal waste Other sources include the use of Cd for industrial applications, such as in the production of pigments, stabilisers, and alloys In addition, Cd is present in ... to determine how the major components of the amalgam (Cu, Zn and Hg) diffuse into the structures of the teeth Curson and Crocker20 determined the concentrations of Zn and Pb in the pulp of the...
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Soil Sampling and Methods of Analysis - Part 2 ppt
Ngày tải lên :
12/08/2014, 02:23
... analyzing tree nursery and forest soils often determine both NO3 and NH4 There is considerable diversity among laboratories in the extraction and determination of NO3 and NH4 In addition, incubation ... aeolian sand The findings of Doyle and Fletcher (1977) pointed to the potential usefulness of information on the Se content of soil parent materials when designing sampling programs for investigating ... Standard solution for Cu, Zn, and Mn determination by atomic absorption: a Combined Cu and Zn standard solution: 0, 0.2, 0.4, 0.8, 1.2 to 2.0 mg mLÀ1 of Cu and of Zn in M3 extractant b Mn standard...
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Soil Sampling and Methods of Analysis - Part 5 ppt
Ngày tải lên :
12/08/2014, 02:23
... weight equivalent) into jars and record the weight of each jar plus soil without its lid Place one vial containing 10 mL of M NaOH and one vial containing water into each jar and seal them with ... present in any solution, including soil extracts This might explain the confusion perceived in the scientific literature pertaining to the definition of soil DOM A clear definition and distinction ... POTENTIALLY MINERALIZABLE N 46.2.1 THEORY In theory, potentially mineralizable N is the amount of N that will mineralize in infinite time at optimum temperature and moisture It is estimated by incubating...
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Soil Sampling and Methods of Analysis - Part 7 pot
Ngày tải lên :
12/08/2014, 02:23
... profile The zone of influence of the EM field in the metal ring probes includes the plastic separating the rings, the PVC access pipe, and the surrounding soil, which is in a fringe field of ... standard method of water content measurement The popularity of the method for soil=environmental monitoring and research arises from a combination of its accuracy in a wide range of soils and its ... of Æ0:01 m3 mÀ3 The EM field for TDR measurement propagates both in the resin comprising the probe, and in the surrounding soil, with more of the field in soil in wet than in dry soil, meaning...
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Soil Sampling and Methods of Analysis - Part 8 (end) pdf
Ngày tải lên :
12/08/2014, 02:23
... contamination of these organisms, including direct skin contact, inhalation, or ingestion All bacteria, including transgenic lines (e.g., carrying an antibiotic resistance gene), must be maintained ... eye injury Skin contact: Causes skin burns May cause deep, penetrating ulcers of the skin Ingestion: Causes gastrointestinal tract burns May cause perforation of the digestive tract Bases and ... eye injury Skin contact: Causes skin burns May cause deep, penetrating ulcers of the skin Ingestion: Causes gastrointestinal tract burns May cause perforation of the digestive tract Does not induce...
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Báo cáo y học: "Application of methods of identifying receptor binding models and analysis of parameters" potx
Ngày tải lên :
13/08/2014, 22:22
... because of experimental errors and/ or receptor binding complexity [9,10] In particular, graphic methods are inapplicable for definition of the cooperative binding parameters and for analysis of non-equilibrium ... explored for discriminating among models for receptor binding model and for defining the relevant parameters The procedure devised allows one to determine the receptor binding model and its parameters, ... Biology and Medical Modelling 2004, 1:11 Interaction of one ligand with N types of binding sites k+ j → Rj + L R L; j = 1, N ← j k− j ( 3) Let us note that the ligand-receptor interaction...
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Báo cáo sinh học: "Reaction norms of size characters in relation to growth temperature in Drosophila melanogaster: an isofemale lines analysis" ppsx
Ngày tải lên :
14/08/2014, 19:22
... we often include simultaneous analyses concerning wing, thorax and ratio, in order to save space Data included in the tables but concerning the ratio is discussed in the second section Wing and ... unit of the wing In preliminary experiments, we measured the wing loading of males grown at temperatures, ie 12, 21 and 30°C: average wing loadings were 0.24, 0.29 and 0.32 mg/mm respectively Wing ... variations of the norms of reaction were analysed by comparing 10 isofemale lines The norms of reactions of wing and thorax, although similar, are not identical, and especially the temperatures of maximum...
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a comparative analysis of methods of defense against buffer overflow attacks
Ngày tải lên :
18/10/2014, 18:09
... payload string cannot contain the null character since this would abort the copying of the payload into the buffer Some copying routines of the C library use carriage returns and new lines as a ... processing of strings But at the same time it is also dangerous, because the scheme breaks down if a string is not null terminated, and because there is no way of knowing the length of the string ... scrutinize the software but relatively uncoordinated The latter is characteristic of commercial organizations, with fewer pairs of eyes scrutinizing the software but in a much more systematic and...
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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
... (protein) amino acids which can be leucine (L) and arginine (R) in microcystin LR, arginine (R) and arginine (R) in microcystin RR, Leucine (L) and tryosine (Y) in microcystin LY etc Microcystins ... cylindrospermopsin and neurotoxins such as anatoxin-a, anatoxin-a(s) and saxitoxins, the marine toxin aplysiatoxin, debromoaplysiatoxin and lyngbyatoxin-a), and lipopolysaccharides (LPS) All are biotoxins ... microcystins, nodularin and cylindrospermopsin) in water and potential effects of exposure to microcystins were investigated The effect of exposure of a human cell line to low amounts of microcystins...
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Instrumental methods of analysis
Ngày tải lên :
01/12/2015, 22:43
... and in pollution monitoring 3.It is extensively used in determination of alkali and alkaline earth metals in soil,glass,ceramic,cement etc., 5.15.4 DETERMINATION OF CONCENTRATION OF SODIUM AND ... Complex ion determination (iv) Determination of percentages of keto and enol forms (v) Determination of ozone level in atmosphere (λ260nm) (vi) Study of cis & trans isomers (vii) Study of H+ ion ... present in the sample, it will absorb some of the light, thus reducing its intensity The instrument measures the change in intensity A computer data system converts the change in intensity into...
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Otles methods of analysis of food components and additives
Ngày tải lên :
02/12/2016, 12:54
... retention trap, narrowing chromatographic bands of the analytes The sample volume during fast injection spreads in the column inlet, flooding it and causing “band broadening in the space,” so it ... University of Szczecin Szczecin, Poland Malgorzata Michalska Institute of Maritime and Tropical Medicine Gdynia, Poland Keith A Lampel U.S Food and Drug Administration Laurel, Maryland Robert ... Preservation involves the control of temperature, moisture, oxygen, and light, and Selection of Techniques Used in Food Analysis may be as simple as sealing the sample in a container and placing it in...
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