Browsing Journal Articles by Issue Date

Simulation of the influence of secondary electrons on the performance of potential depressed collectors for TWTs

Musyoki, Stephen; Takahashi, M; Uchikawa, T (2000)

Significant differences have been found between measured and simulated data for collectors designed with codes which disregard the influence of secondary electrons. To solve this problem, various codes have been developed. ...

Financing public universities in Kenya: a model based on rationalised student unit costs and staffing

Aduol, Francis O. (2001)

Whitehead (1967:4) defines the term “Education is t he acquisition of the art of the utilization of knowledge.” The universities are those institutions that teach learners the art of the utilization of knowle ...

A model for estimating student unit cost and staffing requirements for university programmes with reference to Kenyan public universities.

Aduol, Francis O. (2001)

A model for the estimation of student unit costs and the staffing requirements for university academic programmes is presented. The development of the model starts off with the specification of a staff distribution matrix, ...

A Conceptual Framework for Research in Music and Music Education within a Cultural Context

Akuno, EA (2001)

Music education in Kenya has been, and continues to be conducted along Western theories which fall short of defining music as experienced within traditional African cultures (New, 1980; Omondi, 1980; Kwami, 1989; Akuno, ...

Regioselective Synthesis of a Branched Isomer of Nonylphenol, 4-(3′,6′-Dimethyl-3′-heptyl)phenol, and Determination of its Important Environmental Properties

Lalah, Joseph O; Schramm, Karl-Werner; Lenoir, Dieter; Henkelmann, Bernhard; Hertkorn, Norbert; Kettrup, Antonius; Günther, Klaus (2001)

A method for the synthesis of a pure nonylphenol isomer, 4-(3′,6′-dimethyl-3′-heptyl)phenol, by Friedel–Crafts reaction between anisole and 3-bromo-3,6-dimethylheptane that gives a 47.3 % overall yield is reported. The ...

FACTORS AFFECTING PARTICLE RETENTION IN THERMAL FIELD-FLOW FRACTIONATION

Shiundu, Paul M; Munguti, Stephen M; Wamalwa, Ben. M (2002)

In this paper, we report a range of factors which affect the retention of colloidal particles in thermal field-flow fractionation (ThFFF). These results are observed among different sizes of polystyrene (PS) latex particles ...

Micro-structural characterisation and mould-filling behaviour of grey cast iron stirred in the semi-solid state

Muumbo, A; Nomura, H (2002)

Adsorption and detection of some phenolic compounds by rice husk ash of Kenyan origin

Mbui, Damaris N; Shiundu, Paul M; Ndonye, Rachel M; Kamau, Geoffrey N (2002)

Rice husk ash (RHA) obtained from a rice mill in Kenya has been used as an inexpensive and effective adsorbent (and reagent) for the removal (and detection) of some phenolic compounds in water. The abundantly available ...

The effect of boiling on the removal of persistent malathion residues from stored grains

Lalah, Joseph O; Wandiga, Shem O (Elsevier, 2002)

This study aimed at finding the fate of malathion in maize grains and beans stored in a tropical laboratory for 12 months at temperatures of 20–24°C, relative humidity of 42–80% and grain moisture contents of 11.7–12.5% ...

Robust Geodetic Parameter Estimation Under Least Squares Through Weighting on the Basis of the Mean Square Error

Aduol, Francis O. (2003)

A technique for the robust estimation of geodetic parameters under the least squares method when weights are specified through the use of the mean square error is presented. The mean square error is considered in the ...

Processing of Semi-Solid Gray Cast Iron Using the Cooling Plate Technique

Muumbo, Alex; Takita, Mitsuharu; Nomura, Hiroyuki (2003)

A semi-solid processing technique combining a cooling plate and various mold materials is developed to produce high quality gray cast iron components. Flow behavior of semi-solid slurry along an inclined cooling plate is ...

Mechanical properties and microstructure of semi-solid processed cast iron

Muumbo, Alex; Hiroyuki, Nomura; Mitsuharu, Takita (2003)

Obstacles to utilization of information held by archival institutions

Kemoni, Henry N.; Kiplang'at, Joseph; Wamukoya, Justus (Emerald Group Publishing Limited, 2003)

The paper reviews literature on the obstacles that hinder the use of information held in archival institutions. First, it highlights the importance of records and archives as sources of information. Second, the paper ...

Women librarians in Kenya: a study of their status and occupational characteristics

Kiplang'at, Joseph; Majanja, Mabel (Emerald Group Publishing Limited, 2003)

This study investigated the current status and occupational characteristics of women librarians in Kenya. The study’s objectives were to: compare their status to that of their male counterparts; establish their career ...

Removal of Cu(II) from Aqueous Solution Using a Micaceous Mineral of Kenyan Origin

Attahiru, Stephen; Shiundu, Paul M; Onyari, John; Mathu, Eliud (2003)

A micaceous mineral (MicaM) available locally in Kenya was utilized as an inexpensive and effective adsorbent for the removal of Cu2+ ions from aqueous solution. The effects of contact time, pH, temperature, adsorbate and ...

Semi—solid Processing of Cast Iron and Material’S Properties."

Muumbo, A M (2003)

Field Responses of Tsetse Flies (Glossinidae) and Other Diptera to Oils in Formulations of Deltamethrin

Mireji, PO; Mabveni, AM; Dube, BN; Ogembo, JG; Matoka, CM; Mangwiro, TNC (2003)

Investigations were conducted to establish field responses of Glossina pallidipes, G. m. morsitans, muscoids and tabanids to castor, raw linseed, paraffin and chlorinated paraffin oils in deltamethrin suspension concentrate ...

Retention behavior of metal particle dispersions in aqueous and nonaqueous carriers in thermal field-flow fractionation

Shiundu, Paul M; Munguti, Stephen M; Ratanathanawongs, S.Kim Williams (Elsevier, 2003)

Until quite recently, theories on thermophoresis of particles predicted very low thermophoretic velocities of metal particles in liquids. This prediction was based on the understanding that the very high thermal conductivities ...

Magnitude and direction of thermal diffusion of colloidal particles measured by thermal field-flow fractionation

Shiundu, Paul M; Williams, P.Stephen; Giddings, J.Calvin (Elsevier, 2003)

In this paper we provide experimental evidence showing that various types of submicrometer-sized particles (latexes, inorganic, and metallic), suspended in either aqueous or nonaqueous carrier liquids to which a temperature ...

The bioaccumulation and fate of a branched 14C-p-nonylphenol isomer in Lymnaea stagnalis L.

Lalah, Joseph O.; Behechti, Akbar; Severin, Gabriele F; Lenoir, Dieter; Günther, Klaus; Kettrup, Antonius; Schramm, Karl-Werner (2003)

A single branched isomer of p-nonylphenol, 4(3′,6′-dimethyl-3′-heptyl)-phenol, previously identified by gas chromatography-mass spectrometry as one of the major constituent isomers in p-nonylphenol (constituting approximately ...

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