Browsing Department of Chemistry by Author "Birungi, Grace"
Now showing items 1-20 of 22
-
Aflatoxin Contamination of Cattle’s Concentrate Feeds; A Case Study in Dar Es Salaam-tanzania
Jonathan, Sahan; Nalumansi, Irene; Birungi, Grace (Research square, 2022-07-08)Abstract Background Aflatoxicosis associated with the consumption of aflatoxin contaminated maize and maize products has been reported in the central part of Tanzania (Chemba, Kondoa, and Kiteto), however little is known ... -
Assessment of nonsteroidal anti-inflammatory drugs by ultrasonic-assisted extraction and GC-MS in Mgeni and Msunduzi river sediments, KwaZulu-Natal, South Africa
Gumbi, Bhekumuzi P; Moodley, Brenda; Birungi, Grace; Ndungu, Patrick G. (Environ Sci Pollut Res, 2017-06-27)The occurrence of eight pharmaceuticals was monitored during four seasons (spring, summer, autumn, and winter) along a 250-km stretch of the Msunduzi and Mgeni rivers in KwaZulu-Natal, South Africa. This paper describes ... -
Detection and quantification of acidic drug residues in South African surface water using gas chromatography-mass spectrometry
Gumbi, Bhekumuzi P.; Moodley, Brenda; Birungi, Grace; Ndungu, Patrick G. (Chemosphere, 2016-10-26)A method was optimized for derivation, separation, detection and quantification of salicylic acid, acetylsalicylic acid, nalidixic acid, ibuprofen, phenacetin, naproxen, ketoprofen, meclofenamic acid and diclofenac in ... -
Detection and Quantification of Emerging Organic Pollutants in the Umgeni and Msunduzi Rivers
Moodley, Brenda; Birungi, Grace; Ndungu, Patrick (Water Research Commission, 2016-12)BACKGROUND Globally, there is a strong interest and extensive research activities on emerging organic contaminants and there is an increasing need to monitor these compounds in order to understand the risks posed to human ... -
Determination of cyanobacterial cyclic peptide hepatotoxins in drinking water using CE
Birungi, Grace; Li, Sam Fong Yau (Electrophoresis, 2009-03-23)Four cyanobacteria hepatotoxins microcystin LR, microcystin RR, microcystin YR, and nodularin were simultaneously determined in drinking water using CZE and MEKC coupled with UV detection. The toxins were satisfactorily ... -
Evaluation of organochlorinated pesticide (OCP) residues in soil, sediment and water from the Msunduzi River in South Africa
Clement Adeyinka, Gbadebo; Moodley, Brenda; Birungi, Grace; Ndungu, Patrick (Environmental Earth Sciences, 2019-03-06)Organochlorinated pesticide (OCP) concentrations were evaluated in sediment, soil and surface water of the Msunduzi River as well as the influent, effluent and bio solids from the Darville wastewater treatment plant (WWTP) ... -
Evaluation of persistent organochlorine pesticides and polychlorinated biphenyls in Umgeni River bank soil, KwaZulu- Natal, South Africa
Gakuba, Emmanuel; Moodley, Brenda; Ndungu, Patrick; Birungi, Grace (Water SA, 2019-09-23)This study investigated the presence and distribution of organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) in soil collected along the banks of the Umgeni River, one of the largest rivers in the province ... -
Fluoride Contamination and Its Optimum Upper Limit in Groundwater from Sukulu Hills, Tororo District, Uganda
Egora, Moses; Birungi, Grace (Scientific African, 2019-11-13)This study was carried out to assess fluoride (F-) concentration and to determine its upper permissible limit in groundwater from Sukulu Hills, a phosphate mining area in Tororo District, Uganda, where groundwater is the ... -
Indoor air quality in rural Southwestern Uganda: particulate matter, heavy metals and carbon monoxide in kitchens using charcoal fuel in Mbarara Municipality
Nakora, Nicholas; Byamugisha, Denis; Birungi, Grace (SN Applied Sciences, 2020-11-20)The use of biomass energy over open fires in sub-Saharan Africa is rampant yet it is associated with air pollution. Information on the contribution of common biomass like charcoal to indoor air pollution in Uganda is scarce; ... -
Investigation of the effect of exposure to non cytotoxic amounts of microcystins
Birungi, Grace; Fong Yau Li, Sam (Metabolomics, 2010-12-12)This paper describes a metabolomic approach for investigation of the potential effect of exposure of humans to low amounts of microcystins using HepG2 cell line. Microcystins are hepatotoxins produced by cyanobacteria ... -
Metabolomics Approach for Investigation of Effects of Dengue Virus Infection Using the EA.hy926 Cell Line
Birungi, Grace; Chen, Sheryl Meijie; Loy, Boon Pheng; Lee Ng, Mah; Fong Yau Li, Sam (Journal of Proteome Research, 2010-10-18)This paper describes a multiplatform analytical approach combining proton nuclear magnetic resonance (1H NMR) spectroscopy and mass spectrometry (MS), together with pattern recognition tools in a metabolomics study used ... -
Occurrence and significance of polychlorinated biphenyls in water, sediment pore water and surface sediments of Umgeni River, KwaZulu-Natal, South Africa
Gakuba, Emmanuel; Moodley, Brenda; Ndungu, Patrick; Birungi, Grace (Environ Monit Assess, 2015-08-05)The Umgeni River is one of the main sources of water in KwaZulu-Natal, South Africa; however; there is currently a lack of information on the presence and distribution of polychlorinated biphenyls (PCBs) in its sediment, ... -
Occurrence and significance of polychlorinated biphenylsin water, sediment pore water and surface sedimentsof Umgeni River, KwaZulu-Natal, South Africa
Gakuba, Emmanuel; Moodley, Brenda; Ndungu, Patrick; Birungi, Grace (Environ Monit Assess, 2015-08-05)The Umgeni River is one of the main sourcesof water in KwaZulu-Natal, South Africa; however;there is currently a lack of information on the presenceand distribution of polychlorinated biphenyls (PCBs) inits sediment, ... -
Occurrence of selected pharmaceuticals in water and sedimentof Umgeni River, KwaZulu-Natal, South Africa
Matongo, Solomon; Birungi, Grace; Moodley, Brenda; Ndungu, Patrick (Environ Sci Pollut Res, 2015-02-05)Selected pharmaceuticals including antibiotics, an-tipyretics, a stimulant, an antiepileptic and an antipsychoticdrug were determined in wastewater, surface water and sedi-ment along the Umgeni River which is the main ... -
Pesticide use in vegetable production in rural Uganda -A case study of Kabale District, South western Uganda
Ngabirano, Hannington; Birungi, Grace (African Journal of Agricultural Research, 2020-09-29)A study to investigate commonly grown vegetables, commonly used pesticides, and pesticide use practices was conducted in Kabale District, in South-western Uganda. This is because indiscriminate pesticide use and poor ... -
Pharmaceutical residues in water and sediment of Msunduzi River, KwaZulu-Natal, South Africa
Matongo, Solomon; Birungi, Grace; Moodley, Brenda; Ndungu, Patrick (Chemosphere, 2015-03-27)The little data about pharmaceutical residue contamination in African water bodies motivated our study on the occurrence of pharmaceutical residues in the water and sediment of Msunduzi River in the KwaZulu-Natal province ... -
Preparation and Identification of Reduced Phosphomolybdate Via, Molybdenum Blue Reaction
Nalumansi, Irene; Birungi, Grace; Moodley, Brenda; Tebandeke, Emmanuel (Oriental Journal of Chemistry, 2020)Sodium thiosulphate reduced phosphomolybdate (STRP) was prepared based on the condensation of phosphate and molybdate ions in aqueous acid medium to form phosphomolybdic acid (PMA) followed by its reduction to molybdenum ... -
Quantitative analyses of selected polychlorinated biphenyl (PCB) congeners in water, soil, and sediment during winter and spring seasons from Msunduzi River, South Africa
Adeyinka, Gbadebo Clement; Moodley, Brenda; Birungi, Grace; Ndungu, Patrick (Environ Monit Assess, 2018-09-20)The lack of information and the need for knowledge on the organic pollutants within the area of KwaZulu-Natal together with the global problem of water supply have prompted our investigation into the analyses of eight ... -
Risk Assessment of Personal Care Products, Pharmaceuticals, and Stimulants in Mgeni and Msunduzi Rivers, KwaZulu-Natal, South Africa
Gumbi, Bhekumuzi P.; Moodley, Brenda; Birungi, Grace; Ndungu, Patrick G. (Frontiers in Water, 2022)In this work, environmental occurrence and risk assessment of pharmaceuticals, personal care products (PPCPs), and stimulants are presented. A quantitative technique isdescribedforultrasonic-assistedsolid-phaseextraction ... -
Spectrophotometric Determination of Low Levels of the Orthophosphate Anion as Molybdenum Blue using Sodium Thiosulphate Reducing agent
Nalumansi, Irene; Birungi, Grace; Moodley, Brenda; Tebandeke, Emmanuel (Oriental Journal of Chemistry, 2020)ABSTRACT A simple spectrophotometric method for the determination of low levels of the orthophosphate (PO43-) in environmental water systems is reported. The method is based the formation of the phosphomolybdate from the ...