Browsing Department of Basic Sciences by Issue Date
Now showing items 1-20 of 70
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A unified swelling potential index for expansive soils
(ScienceDirect, 2003)Soil swelling is a term generally applied to the ability of a soil to undergo large changes in volume due to increased moisture content. Several commonly used swelling potential indices, namely Atterberg limits, coefficient ... -
Cation Exchange Capacity (CEC) determination from spectroscopy
(International Journal of Remote Sensing, 2010)Swelling soils are a major engineering problem and their detection is one of the most important site investigation undertakings in the construction industry. Methods of their detection have been developed over the years, ... -
Equilibrium and Kinetics Studies for the Adsorption of Aqueous Cu (II) ions onto Mangroves Biomass
(2013)In this study, adsorption of copper from aqueous solutions was investigated using mangrove biomass from the Kenyan Coast. The efficacy of mangrove biomass on the removal of copper (II) ions from aqueous solutions was ... -
A review on phenolic compounds in Illicium species and their pharmacological effects
(2013)This review focuses mainly on findings of chemistry and pharmacological activities of phenolic compounds in Illicium plants. The continued chemical studies of Illicium species such as I.difengpi, I.verum, I.griffithii, ... -
Chemical Constituents in Extracts from Leaves of Lantana trifolia and Their In Vitro Anti-oxidative Activity
(2014)Objective To isolate, purify, and analyze the anti-oxidants from the leaves of Lantana trifolia. Methods The anti-oxidative activities of the crude extracts from liquid-liquid extraction of L. trifolia leaves were assayed ... -
Isolation and Identification of Bioactive Constituents from Stem Barks of Illicium difengpi
(2014)Objective To isolate and identify bioactive constituents from the stem barks of Illicium difengpi. Methods The chemical constituents were isolated and purified by repeated silica gel, Sephadex LH-20, recrystallization, and ... -
A review on chemistry of some species of genus Vepris (Rutaceae family)
(2014)This review presents the current known phytochemical constituents of the genus Vepris. The genus is a rich source of alkaloids and limonoids most of which possess the 3, 4-methylenedioxy moieties. They are frequently used ... -
Iron Enrichment In Laterites Soils From Selected Regions In Kenya Using Magnetic Separation
(IOSR Journal of Engineering (IOSRJEN), 2014)Laterites also known as murrams from selected sites in the Republic of Kenya were analyzed for chemical and mineral content with particular interest in iron. In Kenya, laterites are only used mainly for surfacing roads. ... -
Effects of Temperature on Ilmenite During Concentration of Iron in Laterites Using Charcoal and Separation using Magnetic Separation
(International Journal of Scientific Engineering and Technology, 2014)Effect of temperature on ilmenite minerals found in laterites has been investigated. It was found that during reduction of iron minerals in laterites to magnetite using charcoal at temperatures of about 500-700oC, ilmenite ... -
Magnetic Concentration of Iron in Lateritic Soils from Kamahuha, Murang’a County, in Kenya using Carbon Monoxide Generated In-Situ
(International Journal of Scientific Engineering and Technology, 2014)Chemical and Mineral Analyses of laterites from selected sites in Kamahuha area of Murang’a County, in the Republic of Kenya, have been carried out with particular interest in the levels of iron and the type of minerals ... -
A review on toxicity effects on Aconitum carmichaelii Debx (Chuan wu and Fuzi) and TCM processing approach ‘Pao zhi’ in reducing/ eliminating toxicity
(2015)Aconitum carmichaelii Debx. (Chuan wu & Fuzi) is one of the most widely used Chinese traditional medicinal herbs and is listed in the Chinese Pharmacopoeia. It has been used for the treatment of various conditions rheumatism ... -
Beneficiation of Iron in Thermal-Reduced Ilmenite by Magnetic Separation
(International Journal of Science and Research (IJSR), 2015)Increasing demands for Iron in countries development, and lack of conventional reducing agents has resulted into sourcing of alternative ways of beneficiating the iron ore. This paper reports on the study that was done to ... -
Assessment of Land Use and Land Cover Change Using GIS and Remote Sensing Techniques: A Case Study of Makueni County, Kenya
(Journal of Remote Sensing & GIS, 2016)The surface of the earth is undergoing rapid land-use/land-cover (LULC) changes due to various socioeconomic activities and natural phenomena. The main aim of this study was to gain a quantitative understanding of land use ... -
FACTORS INFLUENCING TAX REVENUE GROWTH AT KENYA REVENUE AUTHORITY: A CASE OF MERU STATION
(International Academic Journal of Economics and Finance, 2016)Kenya has been over years faced by challenges of meeting its budgets resulting to too much domestic and external borrowing. It is due to this fact that Kenya Revenue Authority was incorporated in 1995 in order to strengthen ... -
Efficacy of Mangrove (Rhizophora Mucronata) Roots Powder in Adsorption of Lead (II) Ions from Aqueous Solutions: Equilibrium and Kinetics Studies
(2016-08)The removal of Pb (II) ions by adsorption onto mangrove roots adsorbent was investigated in this present paper. The removal of lead ions from aqueous solutions was investigated in batch mode which involved the study of ... -
Stereoselective synthesis of fused tetrahydroquinazolines through one-pot double [3 + 2] dipolar cycloadditions followed by [5 + 1] annulation
(2016-10)The one-pot [3 + 2] cycloaddition of an azomethine ylide with a maleimide followed by another [3 + 2] cycloaddition of an azide with the second maleimide gives a 1,5-diamino intermediate which is used for a sequential ... -
One-pot and catalyst-free synthesis of pyrroloquinolinediones and quinolinedicarboxylates†
(2017)A method for the catalyst-free synthesis of pyrroloquinolinediones and quinolinedicarboxylates is develo ped through a one-pot synthesis involving denitrogenation of azide, benzisoxazole formation, aza-Diels– Alder ... -
[3+2] Cycloaddition-based one-pot synthesis of 3,9-diazabicyclo[4.2.1]nonane-containing scaffold
(2017-01)Three-component [3+2] cycloaddition followed by reduction and lactamization has been developed as a one-pot methodology for diastereoselective synthesis of 3,9-diazabicyclo[4.2.1]nonane-containing scaffold. -
Structure-Guided Design and Development of Potent and Selective Dual Bromodomain 4 (BRD4)/Polo-like Kinase 1 (PLK1) Inhibitors
(2018)The simultaneous inhibition of polo-like kinase 1 (PLK1) and BRD4 bromodomain by a single molecule could lead to the development of an effective therapeutic strategy for a variety of diseases in which PLK1 and BRD4 are ... -
Copper extraction by wet chemical method
(Journal of Sustainable Mining, 2018)In many countries large deposits of copper with no locally established copper based industries occur because known methods for extraction are prohibitively expensive and unaffordable. This study reports on an affordable ...