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Development and validation of UV spectroscopic method for simultaneou estimation of dapagliflozin and saxagliptin in synthetic mixture

Development and validation of UV spectroscopic method for simultaneou estimation of dapagliflozin and saxagliptin in synthetic mixture

Proposed method for simultaneous estimation of Dapagliflozin and Saxagliptin in combined sample solutions was found to be simple, accurate and reproducible. Table.2 shows data for optical characteristics. Data for validation and precision studies are given in Table. 3, 4, 5, 6,7,8,9 and 10. Once the equations are determined, analysis required only the measuring of the absorbances of the sample solution at the two wavelengths selected, followed by a few simple calculations. The standard deviation (S.D.), relative standard deviation (%R.S.D.) calculated are low, indicating high degree of precision of the method. The
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Estimation of an O-D Matrix from Traffic Counts – A
Review.

Estimation of an O-D Matrix from Traffic Counts – A Review.

1977 Bon linear estimation of origin-destination flows and gravity model parameters from traffic counts on links.. Department of Geography, University of British Columbia mimeographed no[r]

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RP-HPLC METHOD DEVELOPMENT AND VALIDATION FOR THE SIMULTANEOUS ESTIMATION OF ANTIHYPERTENSIVE DRUGS OLMESARTAN AND CILNIDIPINE IN BULK AND TABLET DOSAGE FORM

RP-HPLC METHOD DEVELOPMENT AND VALIDATION FOR THE SIMULTANEOUS ESTIMATION OF ANTIHYPERTENSIVE DRUGS OLMESARTAN AND CILNIDIPINE IN BULK AND TABLET DOSAGE FORM

RP-HPLC method was developed and validated for simultaneous estimation of olmesartan and cilnidipine in tablet dosage form. The regression value was found to be 0.999 for both olmesartan and cilnidipine , which shows the response is linear from 10-60 μg/mL and 5-30 μg/mL,, respectively. Selectivity experiment showed that there is no interference or overlapping of the peaks either due to excipients or diluents with the main peak of olmesartan and cilnidipine . The percentage RSD for precision is <2 which confirms that method is sufficiently precise and the total run time required for the method is only 8 minutes for eluting both Olmesartan and cilnidipine . So, this method is fast, accurate, precise and sensitive hence it can be employed for routine quality control of tablets containing both drugs in industries.
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Estimation of parameters in partial differential equations    with applications to petroleum reservoir description

Estimation of parameters in partial differential equations with applications to petroleum reservoir description

In Chapter I1 three methods are presented f o r the estimation of constant parameters in distributed parameter systems... distributed parameter case..[r]

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QUANTITATIVE ESTIMATION OF DRUGS AND PHARMACEUTICALS USING CHLORAMINE T AND SAFRANIN O DYE BY AN OXIDATIVE SPECTROPHOTOMETRIC METHOD

QUANTITATIVE ESTIMATION OF DRUGS AND PHARMACEUTICALS USING CHLORAMINE T AND SAFRANIN O DYE BY AN OXIDATIVE SPECTROPHOTOMETRIC METHOD

Cetirizine Hydrochloride: Three tablets of GLOCET each containing 10 mg were collected and crushed into powder. 15 mg equivalent of Cetirizine Hydrochloride was weighed from tablet powder and transferred into 150 mL volumetric standard flask, completely dissolved in bidistilled water by sonication technique for 30 min and filtered with Eisco qualitative filter paper. After that, the solution converted to working concentration on dilution with bidistilled water for oxidative indirect spectrophotometric determination of Cetirizine Hydrochloride drug with Chloramine- T and Safranin-O dye couple.
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“Natural Herbal Supplements – Studies on Phytochemical Constituents and Estimation of their Nutritional Values” by Kruti Pandya, Bhavna Solanki, Nilesh Gurav, Surendra Bhatt, India.

“Natural Herbal Supplements – Studies on Phytochemical Constituents and Estimation of their Nutritional Values” by Kruti Pandya, Bhavna Solanki, Nilesh Gurav, Surendra Bhatt, India.

The protein estimation was carried out by the Lowry’s method. Bovine serum albumin (BSA) was used as a standard for preparation of the standard graph with ranges from 0µg - 250µg concentration (0µg served as a blank). The sample to be tested was weighed accurately and dissolved in distilled water and filter and use as the sample. Take different aliquotes and make up the volume with distilled water and add reagent C (Alkaline copper solution: Mix 50 ml of Reagent A and 1 ml of Reagent B) and incubate at room temperature for 10 minutes, after which 0.5 ml of Folin- Ciocalteau reagent was added and incubated at dark for 20 minutes and the absorbance was read at 660 nm on a UV Spectrophotometer.
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The USP official method for the estimation of clozapine from tablets is by HPLC using C8column. Various methods have been reported for estimation of clozapine in biological matrices such as plasma. Clozapine having a strong chromophore shows UV absorption and hence most of these methods include the use of HPLC with UV detector [4-7]. Spectrophotometric methods

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Wilhelm, Matthias
  

(2019):


	Ideas and jobs: an assessment of public policies to promote science, innovation, and employment.


Dissertation, LMU München: Volkswirtschaftliche Fakultät

Wilhelm, Matthias (2019): Ideas and jobs: an assessment of public policies to promote science, innovation, and employment. Dissertation, LMU München: Volkswirtschaftliche Fakultät

Different measures of a county’s area constitute the first type of variable used for the estimation of rooftop potential. In addition to the standard covariates, row (1) controls for total county area, row (2) controls for total settlement area (area des- ignated to buildings and transport), and row (3) controls for total dwelling area (area designated to buildings). The second determining factor for the measure of rooftop potential is population density, for which we control in row (4). The final set of variables concerns housing, with the square meters of housing per individual of working age being an additional covariate included in row (5), and the average number of apartments per residential building being added in row (6). Overall, none of the additional covariates changes the results substantially, suggesting that there is no single cross-sectional determinant of PV installations that explains away the main findings. That being said, the addition of the num- ber of apartments per building has the largest effect on the results, leading to a drop in the coefficients by at least one third. A potential reason for this is that the number of apartments per building are strongly correlated with the ownership structure of housing. 3 As installing PV systems requires unanimous consent of all owners of a building, a diverse ownership structure increases the transaction costs of the investment decision, leading to lower investments. As a consequence, the number of apartments per building, via their strong correlation with the own- ership structure, is a strong predictor of PV installations, and hence absorbs parts
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An imitation model of the financial economic mechanism of taking strategic decisions at the enterprise

An imitation model of the financial economic mechanism of taking strategic decisions at the enterprise

Under the conditions of transformation economy the need for efficient scientifically substantiated economic forecasts does not decrease, on the contrary, it essentially increases. That is why it is necessary to look for the ways for the correlation of the content and organization of the development of financial-economic forecasting with the changes taking place in all the fields of activity. A complex program-oriented forecast of the financial and economic development of the enterprise under the conditions of the transformation economy is necessary. It causes the use of mathematical models whose creation requires taking into account certain elements. They include a problem situation; the term of taking a strategic decision; the necessary resources; a system of factors subject to management; unmanageable factors; the state of the environment (by the unmanageable factors); the system of restrictions (resource, time, legal, social etc.); a system of manageable factors relations; a system of unmanageable factors relations; the result of the actions; a system of the criteria for the determination of the actions result correspondence to the posed purpose; a system of the usefulness functions for the estimation of the result by the criteria system; a system of functions for the estimation of the expected effect of the actions realization; a complex estimation of the alternatives; an optimal strategic decision.
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Probability density function estimation using orthogonal forward regression

Probability density function estimation using orthogonal forward regression

Outline o Motivations/overview for sparse kernel density estimation o Proposed sparse kernel density estimator: m Convert unsupervised density learning into constrained regression by ado[r]

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Single Image Dehazing Algorithm Based on Dark Channel Prior and Inverse Image

Single Image Dehazing Algorithm Based on Dark Channel Prior and Inverse Image

By combining the dark channel prior and the inverse image, and changing the estimation of the atmospheric light, we get effective dehazing results compared with the o[r]

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Geometric properties of grasspea seeds and their mechanical loads

Geometric properties of grasspea seeds and their mechanical loads

Estimation of the variability of phenotypic features and yield structure was performed on the basis of results obtain- ed in a field experiment. The experiment was conducted on an experimental field of the Institute of Plant Genetics, PAS, in Cerekwica, sowing seed on plots of 4.5 m 2 in area, with 30 x 15 cm spacing, in random blocks with three replications. The day after the sowing the Afalon weed control prepa- ration was applied. Due to the good level of nutrients in the soil and to the low requirements of grasspea in this respect no mineral fertilization was applied. With relation to the phenological phases, only the time of start of blooming was determined, as the number of days from sowing to the mo- ment when 50% of the plants began flowering. Other traits (Table 1) concerning plant height, height of first pod, pod morphology and yield-forming traits were estimated for plants harvested in the phase of full seed ripeness, analysing 15 plants from each replication. Geometric measurements of seeds of the collections studied (thickness, width, length) were taken with accuracy of 0.01 mm. The measurements were made on seeds with conditional moisture, with 300 replications for every sample. Mechanical quasistatic tests were made on a strength-testing apparatus in accordance with a method developed earlier, with 60 replications. The result of the tests was determination of the maximum force (N), elastic force (N), maximum deformation (mm), energy (mJ) and modulus of elasticity (MPa).
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O,O Di­methyl O (4 sulfamoylphen­yl) phospho­ro­thio­ate (cythio­ate)

O,O Di­methyl O (4 sulfamoylphen­yl) phospho­ro­thio­ate (cythio­ate)

Geometry . All s.u.'s (except the s.u. in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell s.u.'s are taken into account individually in the estimation of s.u.'s in distances, angles and torsion angles; correlations between s.u.'s in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell s.u.'s is used for estimating s.u.'s involving l.s. planes.

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Sparse massive MIMO OFDM channel estimation based on compressed sensing over frequency offset environment

Sparse massive MIMO OFDM channel estimation based on compressed sensing over frequency offset environment

Studies have shown that wireless channels are usually sparse, especially for cellular massive MIMO-OFDM systems [12]. In other words, the tap coefficients of most paths in channel impulse response (CIR) can be regarded as zero. Moreover, for a given receive antenna, the channel delays of all transmit antenna can be consid- ered to be consistent due to the small transmission base station array. In order to take advantage of the channel sparsity, we introduced the compressed sensing (CS) theory to estimate channel in MIMO-OFDM systems [13]. One of the advantages is that the pilots needed in CS-based channel estimation are much less than that of LS and MMSE [14]. Literature [15] uses orthogonal matching pursuit (OMP) and compressed sampling matching pursuit (CoSaMP) to achieve channel estima- tion of MIMO-OFDM systems. The main drawback of those schemes is that the channel sparsity level is regarded as a priori information in receive end [16]. Un- fortunately, the channel sparsity level is unknown in the actual communication process, which limits their appli- cation in practice. Sparsity adaptive matching pursuit (SAMP) is a promising candidate scheme for many prac- tical applications when the channel sparsity is unavail- able [17]. It reconstructs channel information through stage by stage estimation of the sparsity level and the true support set of the target signals [18]. However, one of the shortcomings of SAMP is the fixed step size, which easily results in the contradiction between the convergence speed and the recovery accuracy of the al- gorithm [19, 20].
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Volume 3 | Issue 4 - 2013

Volume 3 | Issue 4 - 2013

yellow coloured alkaloid which shows strong yellow fluorescence under U.V light. It shows various pharmacological actions which enhances the therapeutic efficacy of this plant. Berberin a natural alkaloid recently used as an anticancer, antibacterial, antipyretic, anti-inflammatory, anti malarial, antidiabetic and in treatment of cardiovascular Tinospora cordifolia a medicinal herb used in the Indian Ayurvedic system of medicine due to their health benefits.The aim of the present work is based on the standardization, Physiochemical & Phytochemical investigation including finger print analysis by HPTLC studies. The study also includes formulation and evaluation of solid oral dosage form (tablet) from plant extract. Several improved preformulation and formulation parameters had been studied for the standardization of solid oral dosage form of tablet in order to enhance its therapeutic efficacy. Besides this antioxidant activity of the prepared formulation was evaluated by DPPH free radical scavenging method and was found to be 59µg/ml followed by estimation of total flavonol and total phenolic content i.e 29.01mg/gm and 8.12 mg/gm of a sample respectively. Antibacterial activity of the prepared formulation was also evaluated by paper disc diffusion method. Quantification of tablet were done by HPLC method and total berberin content in 500mg of tablet was found to be 218ppm.
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ESTIMATES OF HERITABILITY COEFFICIENTS FOR GROWTH TRAITS OF
DJALLONKE SHEEP REARED ON THE STATE FARM OF BETECOUCOU IN BENIN

ESTIMATES OF HERITABILITY COEFFICIENTS FOR GROWTH TRAITS OF DJALLONKE SHEEP REARED ON THE STATE FARM OF BETECOUCOU IN BENIN

This paper aims to estimate the coefficients of heritability of growth traits in Djallonke sheep. The data on growth (birth weight, the weight at 90 days and at 180 days, as well as the average daily gain from birth to 90 and 180 days) were collected on 334 Djallonke sheep including 140 females and 194 males over two consecutive generations in the Betecoucou Breeding Farm in Benin. The estimation of the heritability coefficients for the characters considered was performed by analysis of variance using the general linear model procedure through a mixed model. Analyses of variance revealed the significance of factors such as year, season and sex on birth weight (BWT), weaning weight (WWT) and average daily gain from birth to 90 days (ADG0- 90). The year*season interaction is significant for all dependent variables, with the exception of the body weight at 6 months (BOWT) and the average daily gain from 90 to 180 days (ADG90- 180). The heritability values estimated were 0.21±0.007, 0.30±0.021, 0.29±0.030, 0.17±0.023 and 0.43±0.037 respectively for BWT, WWT, BOWT, ADG0-90 and ADG90-180. In the view of a genetic improvement program for Djallonke sheep, WWT and ADG90-180 could be used as selection criteria
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A Multivalent Pairing Model of Linkage Analysis in Autotetraploids

A Multivalent Pairing Model of Linkage Analysis in Autotetraploids

Polyploidy has been recognized as an important step in the evolutionary diversification of flowering plants and may have a significant impact on plant breeding. Statistical analyses for linkage mapping in polyploid species can be difficult due to considerable complexities in polysomic inheritance. In this article, we develop a novel statistical method for linkage analysis of polymorphic markers in a full-sib family of autotetraploids. This method is established on multivalent pairings of homologous chromosomes at meiosis and can provide a simultaneous maximum-likelihood estimation of the double reduction frequencies of and recombination fraction between two markers. The EM algorithm is implemented to provide a tractable way for estimating relative proportions of different modes of gamete formation that generate identical gamete genotypes due to multivalent pairings. Extensive simulation studies were performed to demonstrate the statistical properties of this method. The implications of the new method for understanding the genome structure and organization of polyploid species are discussed.
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Effectiveness of link and path information on simultaneous adjustment of dynamic O-D demand matrix

Effectiveness of link and path information on simultaneous adjustment of dynamic O-D demand matrix

Table 2 shows how the error of estimation for the origin– destination pair (2–4 in Fig. 2) followed by the probe vehicles change for different levels of seed matrices reliability and for different objective functions. It is interesting to notice that the information on path travel times OF3 brings to the largest improvements in the estimation of the flow on the O-D pair 2– 4 when the seed matrix is related to RME values up to 0.35 (Table 2). For RME greater than 0.35, information on path travel times adds no improvement with respect to information on only link flows (OF1): this is also confirmed by Fig. 10 for the same range of RME. This last result can be explained considering that when a priori information has very low reliability, adding measurements on only one origin–destina- tion pair and three departure time intervals is not sufficient to achieve further information on the whole time-dependent O-D demand matrix. In fact, path travel times on the last departure times are lost and information on all the origin–destination pairs can be obtained only if speed measurements for the whole time period are added (OF4). Moreover, OF4 implies best proximity (except in Seed 2) between real and estimated demand values for the O-D pair 2–4 (Table 2).
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Vessel charter rate estimation for offshore wind O&M activities

Vessel charter rate estimation for offshore wind O&M activities

3 ESTIMATION OF VESSEL CHARTER RATES At the very first stage, it was important to identify available vessels and their technical specifications, which can change the charter rates significantly. In this respect, the jack-up vessel database of Universi- ty of Strathclyde, Naval Architecture and Marine Engineering Department (NA-ME) and various other sources are investigated in order to develop a com- prehensive list of technical specifications of the jack-up vessels. Crane capabilities, maximum opera- tional water depths, maximum operational weather characteristics of the vessels become essential, when the maintenance of offshore wind farms is taken into consideration. Therefore, the vessels which have similar properties are subsumed under six different categories.
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Vessel charter rate estimation for offshore wind O&M activities

Vessel charter rate estimation for offshore wind O&M activities

3 ESTIMATION OF VESSEL CHARTER RATES At the very first stage, it was important to identify available vessels and their technical specifications, which can change the charter rates significantly. In this respect, the jack-up vessel database of Universi- ty of Strathclyde, Naval Architecture and Marine Engineering Department (NA-ME) and various other sources are investigated in order to develop a com- prehensive list of technical specifications of the jack-up vessels. Crane capabilities, maximum opera- tional water depths, maximum operational weather characteristics of the vessels become essential, when the maintenance of offshore wind farms is taken into consideration. Therefore, the vessels which have similar properties are subsumed under six different categories.
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