Category: CHEMISTRY & PHYSICS

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The Role of Chromogenic Replica System for Isolation & Identification of Uropathogens in the Era of Molecular Diagnostics

Multidrug resistance in uropathogens is a serious problem in a health care set up. To deal with that, rapid identification of the etiological agent from clinical urine sample is utmost important. Use of replica disc for presumptive identification of uropathogens is an easy to perform, cost effective and rapid method, which can be, adopted in…
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July 26, 2019 0

Nutrient Solution: Agronomic Characteristics and Quality of Strawberry Fruits Cultivated in Substrate

Aims: This study determined a nutritive solution and evaluated the performance in the development, production and quality of strawberry cultivated in the substrate. Study Design: The treatments were commercial and recommended nutritional solutions for strawberry using the methods of Castelane and Araújo (C.A.), Furlani and Fernandes Junior (F.F.J.) and the proposed solution with seven replicates.…
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July 25, 2019 0

In-vitro Anti-Bacterial Activity of Extracts of Euphorbia abyssinica (Desert Candle) Stem-Bark and Latex

Introduction: Plants are a limitless gift of nature to humans and they possess very appreciative values and roles. They have stood the test of time in the life of man since creation. All over the world, they are hugely exploited for food, fuel, timber, medicine etc. The natural endowment of plants with numerous metabolites and…
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July 24, 2019 0

The Mode of Transmission of Banana streak virus by Paracoccus burnerae (Homiptera, Planococcidae) Vector is Non-circulative

The causative agent of banana streak disease (BSD) is Banana streak virus (BSV). In tropical countries such as Kenya, the virus causes considerable damage to the banana crop besides lowering banana production yields. Several mealy-bug species have been reported as vectors of BSV. The latent and retention time of the BSV in the oleander mealy-bug…
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July 24, 2019 0

A New Definition of Limit of Periodic Function and Periodic g-Contractive Mapping at Infinity

Limit is a basic concept of calculus. However, according to the updated definition, the limit of periodic function at infinity is not in existence. This conclusion of description does not suit with the periodic phenomenon. For example, the temperature on earth is changed periodically every year since the birth of the earth (viewed as t=0).…
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July 24, 2019 0

An Effective Application of the Spectrophotometric and Thermodynamic Methods for the Determination of Thiamine Hydrochloride

An effective application of the spectrophotometric and thermodynamic methods have been described for the determination of thiamine hydrochloride. The spectrophotometric method was based on charge transfer complexation reaction using thiamine as  n-electron donor and 2, 3 dichloro-5,6-dicyano -1,4-benzoquinone (DDQ) as a π-acceptor to form a highly coloured species  with 1:1 stoichiometric ratio. The coloured product…
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July 24, 2019 0

Analysis of Properties of Biolubricant Obtained from Blends of Used Palm Oil

Vegetable oils are providing alternatives as renewable sources for the production of ecofriendly biolubricants due to increasing environmental challenges, depleting mineral energy reserves, and cost of production from fossil sources. This study evaluates the quality parameters of biolubricant obtained from used palm oil (UPO). The crude UPO was filtered, centrifuged at 500 rpm, and dried…
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July 24, 2019 0

A Comparative Study of Two Different Media Effect on the Electropolymerization of 2-(9-ethylcarbazol-3- yliminomethyl)phenol by Cyclic Voltammetry, Impedance Spectroscopy, XPS, UV-visible Measurements and DFT Calculation

A carbazole-based monomer, 2-(9-ethylcarbazol-3-yliminomethyl)phenol (SIC), was first synthesized and characterized. It was afterward polymerized by potentiostatic methods. Oxidative polymerization of SIC was carried out in two media. The first one (i.e. Bu4NBF4 (0.1M)/MeCN) gives the poly(2-(9- ethylcarbazol-3-yliminomethyl)phenol). However, the second one (LiClO4/MeCN + 35mM HClO4), leads to another polymer, the poly(2-(9-ethylcarbazol-3-yliminomethyl)cyclohexa-2,5-diene-1,4- dione).These two novel polymers…
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July 24, 2019 0

Speciation of Some Heavy Metals in Sediments of the Pennington River, Bayelsa State, Nigeria

Speciation helps in the identifications and quantification of the defined geochemical fractions, forms or phases  in  which  an  element  exists  in  the  environment.  Speciation  in  sediment  compartment  is  a significant step to understand the potential environmental risk, distribution, mobility and bioavailability of pollutants. The total heavy metal concentrations of some environmentally toxic metals in sediments…
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July 24, 2019 0

Preparation of Bisoprolol Impurity A of High Quality

Aims: Research on the convenient method for obtaining (RS)-1-(4-Hydroxymethyl-phenoxy)-3-isopropylaminopropan-2-ol, known as the Impurity A of Bisoprolol according to EP, of high quality. Study Design: Impurity A may be formed as a by-product in the common processes used for synthesis of bisoprolol fumarate. Impurity A may be also formed as a result of degradation (hydrolysis) of…
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July 24, 2019 0