Volume-11 ~ Issue-2 ~ February-2018

Abstract: The study purpose to know the physical, chemical and environmental parameter of glue manufacture in Bangladesh The existing management system of tannery solid wastes and its consequences were investigated through field survey with structured and unstructured questionnaire; the tannery workers, technologists, officials were interviewed during 2009-2011. The maximum amount of solid wastes generated was measured in the peak season (October-December) in the year 2011 through developed formula and found 443 metric ton solid wastes were generated in a day from tannery at Hazaribagh, Dhaka. It was also observed that 90% of the trimmers, (tannery workers) were directly affected by those solid wastes, the surrounding environment became polluted and soil of dumping ground was contaminated with organic carbon (7.97% ±0.170), organic matter (13.70% ±0.292), TKN (1.54% ±0.137), Chloride (0.247% ±0.0284) and Chromium (2.28 ±0.0291).

Keywords: Physical, Chemical, Environmental, Glue manufacture, Bangladesh..

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Abstract: Many innovative concepts and models are being considered to make Nano fluid technology more and more efficient and cost effective. In this article we have illustrated the synthesis process of hybrid nanoparticles which encapsulate paraffin wax, serving as a suitable heat exchanger when dispersed in a heat transfer medium such as propyl glycol (PG), ethyl glycol (EG), water/ glycol mixture or even fluorocarbons. We have employed two different approaches for the synthesis of two hybrid nanoparticles with an outer-metal shell of copper oxide and silver. We analysed the morphology and structure of the nanoparticles synthesized and concluded that copper oxide nanoparticles synthesized were spherical in structure with a size ranging from 250nm to 550nm, however the silver hybrid nanoparticles synthesized were agglomerated nanostructures, due to high electrostatic attraction between paraffin wax and silver nanoparticles. This study showed that the electrodeposition approach was more efficient in the synthesis of hybrid nanoparticle than the hetero-flocculation approach.

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[5]. Wei Yu , HuaqingXie& Xiaoping Wang (2011) Enhanced Thermal Conductivity of Liquid Paraffin Based Nanofluids Containing Copper Nanoparticles, Journal of Dispersion Science and Technology, 32:7, P. 948-951...

Abstract: Three impurities were identified by HPLC methods. These impurities have process related or batch impurities. The identified impurities were found by two different chromatograms isolated by HPLC method. These impurities were not more than 0.3% and unspecified impurities are not more than 0.1%. These impurities were identified by using HPLC system; AR/VAL/HPLC-30, 31, Columns: C-18/AR/363, C-18/AR/369; Vacuum Oven (AR/LAB-I/VACO-01).Humidity Dessicator (AR/LAB-II/HDCR-01). Linearity range for Felodipine is 0.99990. LOD for Felodipine 0.003 & LOQ0.011, for Impurity-A, 0.003 &0.011, Impurity -B, 0.002 &0.005 and Impurity –C, 0.003 & 0.011. % RSD Values for Felodipine, impurities ABC is 4.30,5.87, 4.43 and 9.51. We have also calculated some parameters for validation such as identification, specificity, linearity, precision and system suitability.

Keywords: HPLC method, Validation, linearity, LOD, LOQ and force degradation method

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Abstract: The present study was focused to develop a novel, selective, reliable and sensitive reverse phase high performance liquid chromatography (RP-HPLC) method for the detection and quantification of Tofacitinib in pure form as well as in its dosage form. The chromatographic method was carried out using isocratic elution programme on C18 Phenomenex Luna (250 x 4.6 mm x 5μm) column with a mobile phase proportion of water and Methanol in the ratio of 50:50 (% v/v). The flow rate was set to 1.0 ml/min with 20 μl injection volume. The eluted components were monitored at 254 nm and ambient column oven temperature was maintained. The developed analytical method was validated according to the ICH guidelines. The developed method was also subjected to various stress conditions like..........

Keywords: Tofacitinib, RP-HPLC, Stress condition

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Abstract: The Contamination of water by toxic heavy metals is a world-wide environmental problem. Cadmium, in particular, is found toxic and of enormous harm because of its tendency to accumulate in the tissues of living organisms. The goal of this research is to treat low concentration cadmium bearing water using photo catalysis technique. Present work incorporates the removal of Cd (II) using SrWO4 as a semiconductor. The progress of reaction is observed spectrophotometrically. The effect of variation of different parameters like pH, concentration of cadmium (II), amount of photocatalyst, light intensity etc. on the rate of reaction was observed. A tentative mechanism for the reaction is proposed.

Keywords: Reduction, Pseudo first order kinetics, pH, light intensity, Semiconductor, concentration of Cd(II) etc.

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Abstract: SPECT is an imaging technique used for diagnostic purposes in Nuclear Medicine. SPECT provides images of superior quality to X-Rays imaging techniques that are normally used during vascular embolization procedures. Vascular embolization is a minimally invasive technique used to reduce the size of a tumor by applying polymeric microspheres. Therefore, radioiodinated polymeric microspheres can be used for SPECT imaging during vascular embolization to make this procedure more efficient and safer. As phenolic compounds allow radioiodination in high yields, these substances can be selected for both copolymerization and radioiodination. In this work, we evaluate the copolymerization between vinyl acetate and 4-vinyl phenol for further radioiodination. Respectively, bulk.......

Keywords: copolymerization, microspheres, radioactive tracer, radioiodination, SPECT imaging

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[3]. C. Tang, J. Edelstein, J. L. Mikitsh, E. Xiao, A. H. Hemphill, R. Pagels, A-M. Chacko and R. Prud'homme, Biodistribution and fate of core-labeled 125I polymeric nanocarriers prepared by Flash NanoPrecipitation (FNP), Journal of Materials Chemistry B, 4, 2016, 2428-2434.
[4]. M. Granvogl, and D. Langos, Studies on the Simultaneous Formation of Aromactive and Toxicologically Relevant Vinyl Aromatics from Free Phenolic Acids during Wheat Beer Brewing, Journal of Agricultural and Food Chemistry, 64(11), 2016, 2325-2332.

R. Fujiwara, S. Noda, Y. Kawai, T. Tanaka and A. Kondo, 4-Vinylphenol production from glucose using recombinant Streptomyces mobaraense expressing a tyrosine ammonia lyase from Rhodobacter sphaeroides, Biotechnology Letters, 38(9), 2016, 1543-1549...

Abstract: Toluene was methylated to para-xylene using ZSM-5 zeolite. The catalyst was modified by both compaction and depositing of phosphorus. The results show that modifying with phosphorus before compacting enhances para-xylene selectivity since by this treatment ortho- and meta-xylenes easily isomerised to para-xylene..

Keywords: Toluene, para-xylene, ZSM-5, phosphorus, zeolite, selectivity.

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