Browsing Chemistry by Issue Date
Now showing items 21-40 of 74
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Antibacterial and Antifungal activities of Novel hydroxytriazenes.
(2012-04-02)In a search for new leads potent antimicrobial agents, an array of novel hydroxytriazenes i-xi were synthesized and characterized through their melting point, crystal shape, colour and elemental analysis. ... -
Antibacterial and antifungal activities of novel hydroxytriazenes
(2012-04-02)In a search for new leads potent antimicrobial agents, an array of novel hydroxytriazenes i-xi were synthesized and characterized through their melting point, crystal shape, colour and elemental analysis. In vitro ... -
A review of green synthesis of nanophase inorganic materials for green chemistry applications.
(2012-04-15)The sections in this article are Introduction Green Synthesis of Nanophase Inorganic Materials Metal Oxide Nanoparticles Hydrothermal Synthesis Reflux Synthesis Microwave‐Assisted Synthesis Green Synthesis of ... -
Gas-phase total oxidation of benzene, toluene, ethylbenzene, xylenes using manganese oxides and copper manganese oxide catalysts.
(American Chemical Society, 2012-05-17)Volatile organic compounds (VOCs) continue to be the major source of direct and indirect air pollution. Here, cryptomelane-type octahedral molecular sieve (OMS-2) manganese oxide, amorphous manganese oxide (AMO), and mixed ... -
A review of hydrofluoric acid and its use in the car wash industry
(2012-09)Hydrofluoric acid (HF) is a common ingredient in car wash cleaning solutions mainly because it is highly effective and relatively inexpensive. Particulate matter from brake pads and discs, tire wear, and abrasion of road ... -
Geochemical and Mineralogical Characteristics of Geophagic Materials from Kiambu, Kenya
(Modern Scientific Press Company, Florida, USA, 2012-09)Geophagia is the deliberate consumption of soil and clay. The practice of geophagia is due to reasons of culture, medicinal, religious and mineral deficiency. Geophagy is widespread among pregnant and ... -
Comparison of Chemical and Mineralogical Properties of Geophagic Materials from Taita and Mombasa, Kenya
(2012-10)Geophagy is the deliberate consumption of soil and clay deposits by animals including man. The practice is widespread particularly in pregnant women in Africa. This study of geophagic soil from coast province in Kenya had ... -
Synthesis and Insecticidal activities of some selected hydroxytriazenes
(2012-10)Eight hydroxytriazenes were synthesized and then subjected to spot tests. The composition of these hydroxytriazenes was analyzed using elemental analysis and their physical characteristics like melting point, crystal shape ... -
Investigation Of Physicochemical and Bacteriological Characteristics Of Water Samples From Irigu River Meru South, Kenya
(2012-11)Physicochemical and bacteriological parameter levels of river Irigu were investigated during wet and dry season in order to assess the degree of pollution .The results obtained were compared with WHO standards for drinking ... -
Effect of Human Activities and Seasonal Variation on Water Quality of Nkenye (Chikuu) Stream in Chuka, Kenya
(2013-01)Composite water and sediment samples were taken from Nkenye stream at five different sampling stations during wet and dry seasons. Water quality parameters were analyzed using standard methods to ascertain ... -
Livestock farmers perceptions on the relevance of natural licks in Igambang’ombe Division, Tharaka-Nithi County, Kenya
(2014-05)A survey covering 12 Sublocations in Igambang’ombe Divsion and involving 72 respondents was conducted to ascertain perceptions on the relevance of natural licks. Household survey, focus group discussions and direct ... -
High-yield selective conversion of carbohydrates to methyl levulinate using mesoporous sulfated titania-based catalysts
(2015-01)Mesoporous sulfated-metal oxides and mixed-metal oxides prepared by a facile coprecipitation method employing titanium oxysulfate–sulfuric acid complex as a precursor of both titanium and sulfate are highly active and ... -
Selective conversion of fructose to methyl levulinate using sulphated
(2015-01)Mesoporous sulfated-metal oxides and mixed-metal oxides prepared by a facile coprecipitation method employing titanium oxysulfate–sulfuric acid complex as a precursor of both titanium and sulfate are highly active and ... -
Characterization of clays from Tharaka-Nithi County in Kenya for Industrial and Agricultural Applications
(2015-03)Clay samples from Tharaka-Nithi County in Kenya were characterized by hydrometer, X-ray fluorescence spectroscopy (XRF), atomic absorption spectroscopy (AAS), TGA, scanning electron microscopy (SEM) and powder diffraction ... -
Polylactic acid (PLA) viscoelastic properties and their degradation compared with those of polyethylene
(Academic Journals, 2015-10-19)Polyethylene (PE) films are widely used in packaging. PE is a thermoplastic manufactured from nonrenewable petroleum resources. Due to its non–biodegradability, its films have posed serious pollution problems e.g. visual ... -
The role of treatment and counselling in an HIV/ AIDS, Malaria and Tuberculosis Model. An analysis of HIV/AIDS and Malaria
(2015-11)HIV/AIDS remains one of the leading causes of death in the world with its effects most devastating in Sub Saharan Africa due to its dual infection with opportunistic infections especially malaria and tuberculosis. This ... -
Determination of Essential Minerals and Toxic Elements Composition of the Natural Licks Consumed By Livestock in Tharaka-Nithi County, Kenya
(2015-11)Consumption of natural licks is common among domestic animals under natural circumstances, and as a substitute to commercial mineral licks among smallholder livestock keepers in Tharaka-Nithi County, Kenya, with a believe ... -
Determination of essential minerals and toxic elements composition of the natural licks consumed by livestock in Tharaka-Nithi County, Kenya
(2015-11)The aim of this study was to determine the quantities of essential and toxic elements in the natural licks consumed by livestock in Igambang'ombe Division in Tharaka-Nithi County, Kenya. Ten highly used licks, five moderately ... -
Spectrophotometric Determination of traces of Lead (II) in Spinach Samples marketed in Chuka, Kenya
(2015-11-15)Three hydroxytriazenes were synthesized and studied for the spectrophotometric determination of Lead (II) in spinach samples. Lead (II) reacts with hydroxytriazenes to form a 1:2 yellow complex, having a sensitive absorption ... -
Synthesis and characterization of some new half-sandwich ruthenium(II) complexes with bidentate N,N′-ligands and their application in alcohol oxidation
(2016)Graphical abstract New ruthenium (II) pyridine-imine complexes have been prepared and characterized. They show good catalytic activity in the oxidation of alcohols to carbonyl products using NaIO4 in a H2O/tert-butanol mixture.