Browsing MST-Department of Chemistry by Issue Date
Now showing items 1-20 of 236
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The use of crown ethers in the von richter reaction
(Kenyatta University, 1988) -
A study of the Reactions of tetrabromopctacarbonyldimolybdenum(II) Complex with 1 ,2-bis(diphcnylphosphino)ethane at Elevated Temperature
(1998)The reaction between (Mo(CO)4Br2)2,and 1,2-bis( diphenylphosphino )ethane, (dppe), has been investigated. The results show that at the refluxing temperature of tetralin (about 190 C) (Mo( CO)4Br2h reacts with 1,2-bis( ... -
Kinetics and Mechanisms of Catalysed and Uncatalysed Oxidation of Organic Dyes by Inorganic Species and Indicator Reaction for Determination of Cations
(Kenyatta University, 1998)The rate of oxidation of both the uncatalysed and Vanadium (V) catalysed reaction between indigo carmine (IC) and Chromium (VI) as well as the uncatalysed and Ruthenium (III) catalysed reaction between methylene blue ... -
Assessment of the levels of some toxic and Anti nutritional substances in Kenyan coffee pulp
(Kenyatta University, 2001-01)Every year, the Kenyan coffee industry produces over 350,000 tons of clean coffee and similar quantities of associated by-products (coffee pulp and coffee husks). These by-products are often damped into nearby streams ... -
Bio-evaluation of larvicidal plants from the coastal parts of Kenya
(Kenyatta University, 2003)Malaria is responsible for significant morbidity and mortality, particularly among children in sub-Saharan Africa. In this area, estimates of symptomatic malaria range from one to five episodes per child per year, while ... -
The determination of stability constants of cadmium complexes with selected ligands and modelling the likely speciation of cadmium in lake Bogoria, Kenya
(2003)This thesis is a report of a speciation study of the complexes formed by cadmium with selected ligands found to be dominant in an inland salt lake, Lake Bogoria. Water from Lake Bogoria was analysed using standard ... -
Isolation, structure elucidation and screening of metabolities for antimicrobial activity of the plant tabernaemonatana stapfiana britten
(2011-05-09)Many lives are lost everyday to infectious diseases. Access to the usually expensive conventional drugs in most African countries remains a dream and with the advent of HIV/AIDS there has been a rise in new infectious ... -
Oil plants as sources for production of fatty acid methyl asters (biodiesel ) in Kenya.
(2011-05-09)The increased environmental awareness, the world's petroleum supply constraints and high petroleum fuel prices have spurred efforts in many countries to search for suitable alternatives to diesel fuels. Diesel fuels derived ... -
Phytochemical and antimicrobial studied of teclea noblis Del.used in traditional medicine in Kenya
(2011-05-09)Historically, plants have provided a good source of antimicrobial agents. Plant based antimicrobials represent a vast untapped source of medicine with an enormous therapeutic potential. They are effective in treatment of ... -
Phytochemical and anti-microbial investigation of ochna holtzii gilg. from the Kenyan Costal region
(2011-07-26)Plants are used widely in traditional health systems to treat a variety of diseases. This research was specifically directed to investigate a coastal plant Ochna holtzii Gilg., a medicinal plant mainly found in the coastal ... -
Prediction of reaction mechanism and absolute rate constant using computer algorithm: the bromate ion in acidic media reaction
(2011-08-03)This study examined the methods used by the Kenya Tourist Board in marketing adventure tourism in the Mount Kenya region. The study used descriptive survey design in which data was collected using both open and close-ended ... -
The Water Hyacinth Eichhornia Crassipies (mart) Solms as a Biosorbent for Cadmium (II) and Lead (II) Removal: Kinetic and Equilibrium Studies
(2011-08-08)Presence of heavy metals in aquatic systems has become a serious problem. As a result there has been great attention given to new technologies for the removal of heavy metals from contaminated waters. Biosorption is one ... -
Evaluating farmers knowledge in pesticide handling and determining pesticides levels in maize after various processing methods and different storage conditions
(2011-08-09)Post-harvest pesticides applied to consumable foodstuffs usually pose a serious but silent threat to human and livestock health. Some pesticides accumulate slowly in various strata of the ecosystem causing irreparable ... -
Study of reactions of molybdenum (ii) and tungsten (ii) halocarbonyls with nitrogen bases.
(2011-08-10)The study focused on the possible oxidation of various nitrogen bases by molybdenum(II) and tungsten(II) halocarbonyls, formation of zerovalent aminecarbonyl metal complexes and mode of coordination of nicotine to molybdenum ... -
Determination of Selected Essential Elements in Traditional Vegetables, Medicinal Plants, Fruits and Conventionally grown Vegetables in Koibatek, Kenya
(2011-08-23)There is growing awareness about tile efficacy of' essential elements in the maintainance of' good health and prevention of diseases. Zinc plays a vital role in wound healing. immune system, reproductive system and nervous ... -
Analysis of chemical composition of cowpea floral volatiles and nectar
(2011-08-23)Cowpea is one of the 14 species of grain legumes. It rewards insects by producing nectar and it advertises to the pollinators by producing floral volatiles. The volatiles act as cues that guide insect pollinators in terms ... -
Sorption of copper (II) ions from acqueous solutions by regenerated spent bleaching earth
(2011-08-23)Copper pollution of water systems has increased greatly in the recent years in many parts of the world because of increased industrial demand for copper, its heavy use in agrochemicals and inefficiency of conventional water ... -
Thermal decomposition of selected barium compouds in search for an alternativ route for manufacture of sodium hydroxide
(2011-08-23)Previously, sodium hydroxide has been prepared using two processes namely, an Electrolytic process and Caustisization of soda ash. Both methods require a lot of energy and products made under these conditions are very ... -
The speciation of copper(II) ions in dilute solution in the presence of selected amino acid contaminants
(2011-08-23)The stability constants of a number of copper complexes were determined using pHmetric titrations to investigate the effect of complexes, if any, on solubilization of copper. Potentiometric studies were conducted on copper ... -
Synthesis, characterization and electrochemical studies of heterobimetallic complexes of schiff base ligands containing vanadium (II) or nickel (II) and molybdenum (II) centers
(2011-08-23)In recent times polynuclear complexes have generated a lot of interest in the minds of chemists because of their many applications, they have found use as catalysts. in molecular electronics and are also of biological ...
