Volume-14 ~ Issue-11 ~ November 2021

Abstract: In an aqueous phase reduction of Mn(VII) using Na2S2O5, the absorbance of Mn(VII) was monitored at 349 nm using a Unicom UV/Vis Spectrophotometer at different temperatures (303, 308, 313, and 323 K) to study the effect of pH on the reductant at pH 2, 4,6, 7, 8,10,12 and 14 while, the effect of concentration was also considered by varying the concentrations of the reductant (i.e. 4, 6, 8, 10 and 12 mg/L) over a pH of 5,9, 298 K and 5 minutes with concentration of Mn(VII) set at 10mg/L. The kinetic results showed that the reaction was first order with respect to Mn(VII) with the rate equation......

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[4]. Iorungwa, M.S., Wuana, R.A. & Dafa S.T. Synthesis, Characterization, Kinetic, Thermodynamic and Antimicrobial Studies of Fe(III), Cu(II), Zn(II), N'N-Bis(2hydroxy-1,2-diphenylethanone)ethylenediamine Complexes. Chemical Methodologies 2019;3 (4):408-428
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Abstract: Context: The physicochemical and mineralogical composition of cow milk is variable according to the animals' diet, environmental conditions and the lactation period. Samples of raw cow milk collected locally by semi-sedentary agro-pastoralists and mobile pastoralists of North Benin were analyzed in order to evaluate their physicochemical and mineralogical characteristics and to highlight their dietary properties. Materials and methods: The milk samples were collected in sterile glass bottles and transported at room temperature in the dark to the laboratory and then subjected to physicochemical and mineralogical analyses. Parameters such as pH, acidity, density, fat and dry matter content, lactose content and viscosity were determined. Minerals and trace elements......

Keywords: Raw milk, cow, physicochemical analyses, mineralogical composition.

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Abstract: Industrial, agricultural and domestic activities of humans have affected the environmental system, resulting in drastic problems such as global warming and the generation of waste water containing high levels of pollutants. Water pollution due to organic contamination is serious issue because of toxic chemicals and carcinogenic nature of the pollutants. Among various water treatment methods, adsorption is supposed as the best one due to its inexpensiveness. The utilization of all such materials as adsorbents for the treatment of waste water can reduced waste and minimize cost.
Byproducts from agricultural, household and industrial sector have been recognized as sustainable solution for waste water treatment. They allow.......

Keywords: Adsorbents, Activated carbon, COD, BOD, DO, Hardness of water etc

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Abstract: Plant extracts with antioxidant and antibacterial activities are an important research area in the current medical world, aiming to isolate active components in order to develop new chemotherapeutic agents that can be used in the treatment of various diseases. In the present study we determined antioxidant, antibacterial activities of methanol extract of Strophanthus hispidus DC (Stem bark) and his HPLC fingerprint profile. Antioxidant activity evaluated using 2,2-diphenyl2-picryl- hydrazyle ( DPPH) revealed that methanolic extract had a significant antioxidant activity with an IC50 value of 34.63 μg/mL. The in vitro antibacterial activity assessed by Microdilution methods.....

Keywords: Strophanthus hispidus DC, antioxidant, antibacterial, phytochemicals, TLC, HPLC.

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Abstract: new symmetrical carbonohydrazide derivative, (1E,5E)-1,5-bis(1-hydroxypropan-2-ylidene)carbonohydrazide (I), was synthetized by one-step condensation reaction. The structure of this new compound was confirmed by elemental analysis, infrared, UV-Visible and 1H and 13C NMR spectroscopy techniques. The compound (I) crystallizes in the orthorhombic space group Pbca with the following unit cell parameters a = 11.5576 (1) Å, b = 12.6971 (1) Å, c = 13.5932(2) Å, V = 1994.78(4) Å3, Z = 8, R1 = 0.043 and wR2 = 0.131. In the structure numerous intermolecular hydrogen bonds which consolidate the structure into three dimensional network were observed.

Keywords: Carbohydrazide, 2-hydroxyacetone, NMR, UV-Visible, X-ray.

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