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Performances of Shannon’s Entropy Statistic in Assessment of Distribution of Data

c- Src tyrosine kinase inhibitors, Chemometrics and Intelligent Laboratory Systems 134 (2014) 47-52. DOI: 10.1016/j.chemolab.2014.03.003 [83]. M.W.Jr. Chase, C.A. Davies, J.R.Jr. Downey, D.J. Frurip, R.A. McDonald, A.N. Syverud, JANAF Thermochemical Tables, Third Edition, Journal of Physical and Chemical Reference Data 14(1985) pp. 1856. [84]. S.D. Bolboacă, L. Jäntschi, Comparison of Quantitative Structure-Activity Relationship Model Performances on Carboquinone Derivatives, The Scientific World Journal 9 (2009) 1148-1166. DOI

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Identification of the main dyestuffs obtained from Kermes (Kermes vermilio) in the Northwest of Turkey

. Entomol. Fr. (N.S). 25 (1989) 393-410. [11]. J. Wouters, High performance liquid chromatography of anthraquinones: analysis of plant and insect extracts and dyed textiles, Stud. Conserv. 30 (1985) 119-128. [12]. J. Wouters, Dyestuff analysis of scale insects by high performance liquid chromatography (Homoptera: Coccoidea), Proc. ISSIS - VI, Krakow, (1990) part II 61-70. [13]. J. Wouters, N. Rosario-Chirinos, Dye analysis of pre-columbian peruvian textiles with high-performance liquid chromatography and diode

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Globafricalisation and Sustainable Development: Research and Researchers’ Assessments, ‘Publish or Perish’, Journal Impact Factor and Other Metrifications
Utility of N-Bromosuccinimide as a Green Chemical Reagent for Determination of H2-Receptor Antagonists in their Pharmaceutical Dosage Forms

.; Golovchenko, O.S.; Georgiyants, V.A.; Ivanauskas, L. Comparison of chromatographic methods of analysis in a thin layer of the sorbent for identification of famotidine in tablets. Vìsnik Farmacìï 2017 , 2 , 21–24. 5. Basavaiah, K.; Prameela, H.C.; Chandrashekar, U.; Somashekar, B.C. High Performance Liquid Chromatographic Assay Of Famotidine In Pharmaceuticals. Anal. Chem. Indian J. 2006 , 5 , 94–98. 6. Zarghi, A.; Shafaati, A.; Foroutan, S.M.; Khoddam, A. Development of a rapid HPLC method for determination of famotidine in human plasma using a

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Electrochemical and analytical performance of boron-doped diamond electrode for determination of ascorbic acid

Abstract

The electrochemical behavior and determination of ascorbic acid (AA) was investigated at a bare boron-doped diamond (BDD) electrode using cyclic and differential pulse voltammetry. The influence of pH of supporting electrolyte and scan rate on the current response of analyte was examined to select the suitable experimental conditions. It was found that AA provided one well-shaped irreversible and diffusioncontrolled oxidation peak at +0.87 V vs. Ag/AgCl in Britton-Robinson buffer pH 4.0. Applying differential pulse voltammetry, the peak current of AA was linearly proportional to its concentration from 5 × 10-6 to 2 × 10-4 mol L-1 (R2 = 0.999), with the limit of detection of 1.1 × 10-6 mol L-1 and the good repeatability (relative standard deviation of 2.3 %). The developed electroanalytical protocol was successfully applied to determine the content of AA in commercial pharmaceutical preparations, based on the standard additions method, with the obtained recovery of 122 %. The accomplished analytical performance indicates that BDD electrodes are promising electrochemical sensors for pharmaceutical analysis.

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Simultaneous determination of artificial sweeteners in possible counterfeited wines, using high performance liquid chromatography with DAD detection

Abstract

Increased use of food, beverages or drugs containing synthetic sweeteners presents a real danger to health, which is why the EU Member States had to establish a system of regular surveys to monitor sweetener consumption. In case of wine industry, according to law no. 244/2002, Romania prohibits the addition of synthetic sweeteners in wine in order to obtain sweet wine. The official method for detection of adulterated sweet wines with synthetic sweeteners is TLC-Thin Layer Chromatography. However, quantitative methods of analysis are needed to measure levels of sweeteners in different food matrices and high performance liquid chromatography has proved to be a powerful tool for quantitative analysis of compounds at traces levels. In this paper, a high performance liquid chromatographic (HPLC) method for the simultaneous separation and determination of three of the most popular artificial sweeteners (acesulfame potassium, saccharine and aspartame) in a single injection was developed. The described method is rapid, accurate and highly sensitive. Detection limit were 4 mg/L for acesulfame K, 1 mg/L for saccharine and 9 mg/L for aspartame respectively. The precision of the method was about 2% and recovery ranged between 92.6% and 103.3%. There were analyzed commercial wine samples, in order to detect possible counterfeits-sweet and medium sweet wines. Therefore, of the 20 analyzed wine samples, only two samples consisting in wine sweet table, were counterfeited by adding saccharin.

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A new method for macrolide antibiotics determination in wastewater from three different wastewater treatment plants

Abstract

An effective and practical method for the determination of macrolide antibiotics azithromycin, clarithromycin, erythromycin and roxithromycin in wastewater samples has been developed. The analytical method combines solid phase extraction followed by a chromatographic separation by hydrophilic interaction liquid chromatography (HILIC) coupled with an ion trap mass spectrometer utilizing the electrospray ionization technique. Detection of positively charged ions was performed in full scan mode from 500 to 900 m/z. The method detection limits and method quantification limits obtained were in the range of 2.03-7.59 ng L-1 and 6.08-23.84 ng L-1, respectively. Recoveries of solid phase extraction were obtained using SupelTM-Select HLB cartridges ranging from 85.76 % to 92.54 %. All target antibiotics were detected in 100 % of the collected raw influent samples with concentrations varying from 15 ng L-1 to 1849 ng L-1. Azithromycin, clarithromycin and erythromycin were also detected in 100 % of the treated water samples and roxithromycin was present in 96 % of the samples. The highest determined concentration in the treated water samples was 1404 ng L-1 of azithromycin. Based on the determined macrolide concentrations, removal efficiencies of individual wastewater treatment plants were calculated to range from 13 % to 100 %.

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Polymer Dimensional Changes in Optical Cables

, “Design of Polyethylene Cable Jacket Compounds of Superior Jacketing Performance”., Proceedings of the 48th IWCS, 1999, pp. 807-814. 7. “Crystallinity in Plastics”, Zeus Technical Newsletter, Copyright ©2007-2010 Zeus Industrial Products, Inc. 8. P. P. Parlevliet, H. E. N. Bersee and A. Beukers. “Residual stresses in thermoplastic composites – A study of the literature – Part I: Formation of residual stresses” Faculty of Aerospace Engineering, Delft University of Technology, The Netherlands. 28 December 2005. 9. V. B. Gupta, J. Radhakrishnan and S. K. Sett

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Analysis of C3 fraction splitting system performance by mathematical modeling in MATLAB environment

Abstract

Propane-propylene mixture splitting by industrial conventional rectification incorporating a heat pump for energy intensity decrease was modeled in the Matlab environment. The constructed model was verified by comparing its results with operational data of a real C3 fraction splitting unit. As documented, increased product quality can be obtained at zero additional costs due to specific features of the system design. Process capacity and product purity limitations have to be considered in future C3 fraction production increase plans. Further compressor and its driving unit design features have to be incorporated in the calculation model to reliably assess the C3 fraction processing costs and provide a reliable tool for process operation optimization.

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Comparative study on field collected samples of aged silicon rubber composite coatings for high voltage insulators

References 1. Hall, J. F. History and bibliography of polymeric insulators for outdoor applications, paper presented at the IEEE/PES Winter Meeting, 1992. 2. Burnham, J.T. Silicone rubber insulators improve transmission line performance, Transmission and Distribution, August, 1992, pp. 20-25. 3. Kim, S.H.; Cherney, E.A.; R. Hackam The al characteristics of RTV silicone rubber coatings as a function of filler level. IEEE Trans. Electr. Insul., 1992 , 27 (6), 1065-1072. 4. Siderakis, K

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