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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

Aug 31, 2017Open    AccessArticle

Evaluation of Hexadate Ligand 1, 3-bis(2,2’:6’,2’’-Terpyridyl-5-Ylmethylsulfany l)Propane in the Determination of Iron(II) in Solution by Spectrophotometric and Fluoremetric Methods of Analysis

Philip K. Maritim
Uv-visible and fluorescence spectra of the ligand 1,3-bis(2,2’:6’,2’’-ter- pyridyl-5-ymethylsulfanyl)propane L and it’s iron(II) complex have been investigated for analytical purposes. The two spectra of L and terpy are very similar which confirmed the ability of L to co-ordinate through the six N atoms of L with minimum distortion of the metal ion’s octahedral

Aug 16, 2017Open    AccessArticle

Performance of Egg-Shell and Fish-Scale as Adsorbent Materials for Chromium (VI) Removal from Effluents of Tannery Industries in Eastern Uganda

Sam Bamukyaye, William Wanasolo
The performance of egg-shells and fish-scales biomaterials in separating chromium (VI) ions from tannery effluents obtained from tannery industries in Jinja town of Eastern Uganda was investigated. Using crushed egg-shell and fish-scales as adsorbents, sorption tests were carried out to determine the effects of bio-sorbent concentration and particle size on chromium (VI) removal. The adsorbate concentration in the tannery effluent

Mar 30, 2017Open    AccessArticle

Prediction of the Fragmentation Pathway of Atorvastatin by Using High Resolution Collision Induced Dissociation (HR-MS/MS) Spectral Information

Dev Kant Shandilya, Rekha Israni, Peter Edward Joseph, Venkata Siva Satyanarayana Kantamreddi
Introduction: A possible fragmentation pathway of atorvastatin was proposed based on rational interpretation of high resolution collision induced dissociation (CID) fragmentation spectral data. Method: The mass spectral (MS and MS/MS) data of atorvastatin was obtained by using a flow injection analysis, LC coupled with high resolution mass analyzer system with Q-TOF technology. Results: The elemental composition for

Mar 09, 2017Open    AccessArticle

Study on Extraction Technology of Polysaccharides from Jujube by Microwave Method

Minghang Xu, Xinjian Yao, Jun Wang
Jujube polysaccharide is one of the important natural active ingredients. In this paper, microwave extraction technology was utilized to extract jujube polysaccharide in different conditions using the yield as test index. The results showed that the optimum conditions were solid-liquid ratio 1:30, ultrasonic lasting time 25 min, temperature 50℃, which achieve the highest yield rate 5.38%.

Apr 21, 2016Open    AccessArticle

Analytical Procedures and Method Validation for Determination of Chlorimuron Ethyl in Sediments

Ramom Rachide Nunes, Bruno Henrique Froes Santos, Maria Olimpia de Oliveira Rezende
The present work describes the validation of an analytical method for chromatographic determination of chlorimuron ethyl herbicide (compound of sulphonylurea group) in sediments, in according with Brazilian legislation, following the guidance and normative documents of INMETRO (DOQ-CGCRE-008) and ANVISA (Resolution RE no. 899-2003). The results show that the chromatographic method demonstrated to be selective, accurate, precision and linear over the concentration range of 5.0 - 1000.0 μg·L...

Mar 08, 2016Open    AccessArticle

Physico Chemical Characterization of Tannery Effluent and Its Impact on the Nearby River

Haile Reda Amanial
A study was conducted to characterize Modjo tannery effluent (wastewater) and determine its impact on the Modjo River using some physicochemical parameters. Accordingly, three tannery wastewater samples along wastewater channel at different distances have been taken and three river water samples (one upstream and two downstream) were collected along the river to determine its impact on the river. The samples have been analyzed for temperature, pH, electrical conductivity (EC), total dissolved so...

Jan 27, 2016Open    AccessArticle

Oxygen Reduction Reaction (ORR) on Platinum Coated Nafion Membrane: Effects of Synthesis Conditions

Sakineh Chabi, Mehdi Kheirmand
The present study describes the catalytic activity of the platinum coated Nafion membranes towards oxygen reduction reaction in proton exchange membrane fuel cells. In contrast to the conventional three layered structures of the gas diffusion electrode, as-made gas diffusion electrodes are two layered in which the platinum electrocatalyst are deposited directly onto the Nafion membrane. Spin-coating method and impregnation-reduction approaches were used to synthesize Pt-coated Nafion membranes. ...