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Mar 24, 2020Open    AccessArticle

Comparative Evaluation of Some Physicochemical Properties on Selected Commercially Available Soaps on the Zambian Market

Christopher Mwanza, Kadango Zombe
The Zambian market has witnessed an impressive upsurge in the production and consumption of a variety of soaps in recent years. However, there is scant, if any, knowledge of the quality and safety of these soaps. In this undertaking, the quality of some selected soaps was evaluated. The soap samples were randomly obtained from various supermarkets. The qualities of soaps were assessed based on the following physicochemical parameters: free caustic alkali (FCA), moisture content (MC), total fatty...

Sep 18, 2019Open    AccessArticle

Computer Augmented Modeling of Complexes of L-Phenylalanine and Maleic Acid under Organic Media: Biomimetic Studies

Hadgu Hailekiros Belay
Chemical speciation of ternary complexes of Co (II), Ni (II) and Cu (II) ions with L-Phenylalanine and Maleic acid has been studied by Calvin-Wilson technique at different concentration range of 0 - 50% v/v Organic-water mixture maintaining an ionic strength of 0.16 mol·L-1 at 298.0 K. Alkali metric titrations were carried out in different relative concentrations (M:L:X = 1:2.5:2.5, 1:2.5:5.0, 1:5.0:2.5) of metal (M) to

Aug 26, 2019Open    AccessArticle

Determination of Radionuclides in Borehole Water in the Adenta Municipality of Greater Accra Region

H. K. Agyeman, T. Glover, B. J. Nyarko, S. Osae, E. O. Darko, F. Adeku, J. K. Amoako, J. Owusu-Banahene, S. Inkoom, B. K. Agyeman, M. Abubakar, P. O. Manteaw, E. Amoatey, O. Gyamfi, D. F. Charles
This study was carried out in the Greater Accra Region of Ghana mainly in the Adenta Municipality to determine the baseline radioactivity levels of naturally occurring radioactive material of water in boreholes using gamma spectrometry. According to WHO, the recommended limit of total committed annual ef-fective dose should be 100 uSv/yr for radioactive materials such as 40K, 226Ra and 232Th, which wil

Aug 07, 2019Open    AccessArticle

Formation of Stripes and Channels Structure of DPPC Langmuir Blodgett Monolayer at Middle Surface-Pressure

Zhonghui Xue, Ning Xue
Monolayers of L-α-Dipalmitoylphosphatidylcholine (DPPC) on the air-water interface have been transferred at a middling applied surface-pressure onto the mica substrates using the Langmuir-Blodgett (LB) technique. AFM was applied to observe the formation of morphology of DPPC. Our results show that the Langmuir-Blodgett monolayers of DPPC on mica substrates generate a structured surface with periodic

Jun 28, 2019Open    AccessArticle

The Role of Mg2 and BSA Langmuir Monolayers in Controlling Polymorph and Morphology of CaCO3 Crystal

Zhonghui Xue, Ning Xue
Mg2 and bovine serum albumin (BSA) Langmuir monolayers were used as effective crystal nucleation, growth modifiers and template to control the crystallization of CaCO3. Scanning electron microscopy (SEM), and X-ray diffraction (XRD) were used to characterize the polymorph and morphology of crystals obtained at different experimental

Jun 06, 2019Open    AccessArticle

Removal of Textile Dyes Present in Effluents by Adsorption in Polyurethane Foams Derived from Vegetable Oil

Daniel Henrique Rattis Lemos, Carmen Aparecida Cardoso Maia Camargo, Marcio Antonio Ferreira Camargo
Large amounts of effluents, some even untreated, used in the dyeing in-dustries are dumped into natural water provoking a huge environmental impact daily. The Analytical Chemistry and Polymer Technology Group from the University of Sao Paulo in Sao Carlos, Brazil developed the polyurethane foam. It is a unique type of foam produced from vegetable oil—a renewable natural raw material. The objective of t

May 20, 2019Open    AccessArticle

Evaluation on the Concentration of Heavy Metals in Surface Waters in the Municipality of Pratápolis-MG

Daniel Henrique Rattis Lemos, Carmen Aparecida Cardoso Maia Camargo, Marcio Antonio Ferreira Camargo, Maria Diva Landgraf
Mining causes numerous environmental impacts; among them we have to mention the water contamination due to the residues inherent to the activity. “Morro do Níquel”, a mining site, located in southwest Minas Gerais, Brazil, has promoted an increase in the mining activity in the region. There has also been an increase in the amount of residues and substrates produced with the intensification of the mining activity. Being a purificat

Jan 10, 2019Open    AccessArticle

Physicochemical and Microbiological Quality of Springs in Kyambogo University Propinquity

Timothy Omara, Winfred Nassazi, Monica Adokorach, Sarah Kagoya
The availability of usable water in an area is the first indication of its demonstrated ability to sustain life. In peri-urban areas, urbanites utilize water from springs and compete disapprovingly for it amongst themselves and with animals. The straggling populace and the compromised sanitation are deteriorating spring water sources. There is an urgent need to analyze springs to ascertain their bacteriological and physical qualit

Oct 24, 2018Open    AccessArticle

Polyurethane Foams Derived from Vegetable Oil Used in the Adsorption of Polychlorinated Biphenyls Present in Insulating Mineral Oil

Marcio Antonio Ferreira Camargo, Antonia Marli dos Santos, Gilberto Orivaldo Chierice, Salvador Claro Neto, Maria Diva Landgraf
PCBs, polychlorinated biphenyls (polychlorinated biphenyls), are the generic names given to the class of organochlorine compounds resulting from the reaction of the biphenyl group with anhydrous chlorine in the presence of a catalyst. They are toxic, persistent, bioaccumulative and pose the risk of causing harm to human health and the environment. Large quantities of PCBs were produced in several countries between 1927 and 1977. I

May 25, 2018Open    AccessArticle

Prediction of the Fragmentation Pathway of Atorvastatin De-Protonated Ion

Dev Kant Shandilya, Rekha Israni, Peter Edward Joseph
Introduction: A fragmentation pathway of atorvastatin de-protonated ion was proposed based on rational interpretation workflows. Method: The mass spectral data (MS, MS/MS and MS3) of atorvastatin was obtained by electrospray negative ionization mode with flow injection analysis; using liquid chromatography systems coupled with tandem mass spectr


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