Journal Articles (PAS): Recent submissions
Now showing items 121-140 of 273
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Genomic and environmental risk factors for cardiometabolic diseases in Africa: methods used for Phase 1 of the AWI-Gen population crosssectional study
(2018-09-27)There is an alarming tide of cardiovascular and metabolic disease (CMD) sweeping across Africa. This may be a result of an increasingly urbanized lifestyle characterized by the growing consumption of processed and calorie-dense ... -
Treatment of Tungiasis with Dimeticone: A Proof-of- Principle Study in Rural Kenya
(2014-07)Tungiasis (sand flea disease) is a neglected tropical disease, prevalent in resource-poor communities in South America and sub-Saharan Africa. It is caused by an inflammatory response against penetrated female sand fleas ... -
Fully immunized child: coverage, timing and sequencing of routine immunization in an urban poor settlement in Nairobi, Kenya
(2016-05)Background: More efforts have been put in place to increase full immunization coverage rates in the last decade. Little is known about the levels and consequences of delaying or vaccinating children in different schedules.Vaccine ... -
Effect of boron concentration on physicochemical properties of boron-doped carbon nanotubes
(Elsevier, 2015-01-07)Boron-doped carbon nanotubes (B-CNTs) were synthesized using chemical vapour deposition (CVD) floating catalyst method. Toluene was used as the carbon source, triphenylborane as boron as well as the carbon source while ... -
Charge extracting buffer layers in bulkheterojunction organic solar cell
(Springer, 2015-08-27)The effects of boron and nitrogen-doped carbon nanotubes (B- or N-CNTs) have been investigated as photoactive and charge extracting layer in bulk heterojunction organic solar cell composed of poly(3-hexylthiophene) [P3HT] ... -
(4-{[(Pyridin-4-yl)methylidene]amino}- phenyl)ferrocene
(2012-11-21)The asymetric unit of the title compound, [Fe(CH)(CHN)], contains two independent mol-ecules whose conformations differ, especially in the 4-{(pyridin-4-yl)methyl-idene]amino}-phenyl unit where one is flipped by almost ... -
Organic Solar Cells with Boron- or Nitrogen-Doped Carbon Nanotubes in the P3HT : PCBM Photoactive Layer
(Hindawi Publishing Corporation, 2015-12-02)Either boron- or nitrogen-doped carbon nanotubes (B- or N-CNTs) were incorporated in bulk heterojunction organic solar cells photoactive layer composed of poly(3 hexylthiophene) (P3HT) : (6,6)-phenyl-C61-butyric acid methyl ... -
Bulk Heterojunction Solar Cell with Nitrogen-Doped Carbon Nanotubes in the Active Layer: Effect of Nanocomposite Synthesis Technique on Photovoltaic Properties
(2015-05-08)Nanocomposites of poly(3-hexylthiophene) (P3HT) and nitrogen-doped carbon nanotubes (N-CNTs) have been synthesized by two methods; specifically, direct solution mixing and in situ polymerization. The nanocomposites were ... -
Nitrogen-Doped Carbon Nanotubes Synthesised by Pyrolysis of (4-{[(Pyridine-4-yl)methylidene]amino}phenyl)ferrocene
(Hindawi Publishing Corporation, 2013-08-13)Nitrogen-doped carbon nanotubes (N-CNTs) were synthesized by pyrolysis of (4-{[(pyridine-4-yl)methylidene]amino}phenyl) ferrocene in a solution of either acetonitrile or toluene as carbon source. This was achieved by testing ... -
A review on carbon nanotube/polymer composites for organic solar cells
(John Wiley & Sons, Ltd., 2014-04-13)Carbon nanotubes (CNTs) have unique properties, such as their electrical conductivity, that enable them to be combined with conducting polymers to form composites for use in organic solar cells (OSCs). It is envisaged that ... -
Species composition and distribution of mayflies (Ephemeroptera) in relation to land use systems along the Thika River, Kenya
(Taylor & Francis Group, 2021-02-26)Mayflies (order Ephemeroptera) are widely distributed and commonly used in biological assessment of water quality because of their sensitivity. Their application as bio-indicators in tropical streams and rivers, however, ... -
Effect of Acid Treatment on the Chemical Properties of Clays from Selected Sites in Murang’a and Nyeri counties, Kenya
(2020-11-30)Assessing improvement on the quality of clay has been conducted by treatment with different concentrations of hydrochloric and oxalic acid. This project intended to assess the effect of acid treatment on the elemental ... -
Insecticidal Activity of Ocimum Suave Willd Extracts and Compounds against Sitophilus Zeamais Motschulsky
(2020-11-28)Insect pests cause significant loss of maize production in Africa. Among pests of maize, beetles are the most important, with the maize weevil (Sitophilus zeamais Motsch.) and the larger grain borer (Prostephanus truncatus ... -
Mosquitoes composition, abundance and distribution in swampy and flooded shoreline habitats of Lake Baringo, Kenya, during a period of extreme flooding (2012-2013)
(2020-10)Mosquito ecology is influenced by wetness in the environment. In 2011-2014, a rise in waters of Lake Baringo resulted in unprecedented flooding that inundated over 88km2 of the shoreline. A longitudinal study carried out ... -
Evaluation of Warburgia ugandensis Extracts and Compounds for Crop Protection against Prostephanus truncates
(2020-11)Insect pests cause a significant loss of maize production in Africa. Maize weevil (Sitophilus zeamais Motchulsky) and the larger grain borer (Prostephanus truncatus Horn) are the most destructive insect pests of maize. ... -
Insecticidal Activity of Elaeodendron schweinfurthianum Extracts and Compounds against Sitophilus zeamais Motschulsky
(2020-11)Agricultural production is constrained by pests which cause serious post-harvest losses in African. Maize weevil (Sitophilus zeamais Motschulsky) is one of the most destructive insect pests of maize. Effective synthetic ... -
Copper Extraction Using Aluminum in Acidic Leachate Media
(IISTE, 2020)Copper is found in several minerals with varied elemental composition. For instance, copper minerals occur as chalcopyrite (CuFeS2), bornite (Cu5FeS4), chalcocite (Cu2S), covellite (CuS), cuprite oxide (Cu2O), and malachite ... -
Impure Hydrazone Preparation from Chicken Dung
(IISTE, 2020-09-30)Hydrazones are strong reducing agents. Some hydrazones like hydrazine are is highly toxic and unstable and are therefore found dissolved in water. Chicken dung contains amines and uric acid that are potential sources of ... -
Antimycobacterial Activity, Cytotoxicity and Phytochemical Screening of Organic Extracts of Commiphora Africana Stem Bark from Kenya
(East African Scholars Publisher, 2020-04)Tuberculosis (TB) is a communicable disease that kills approximately three million people annually. Efforts to treat the disease have been made difficult due to the development of drug-resistant strains and co-infection ... -
Characterization of Immunogenic Soluble Crude Proteins from Biomphalaria Pfeifferi Against Schistosoma mansoni
(2020-06-30)Schistosomiasis is the second most prevalent tropical disease in the world after malaria. Chemotherapy and molluscicides which are the main methods of control do not give lasting protection as the disease continues to ...
