For over two decades, research on the biological and analytical applications of calixarenes and their derivatives has been shown remarkable properties towards organic and bioorganic molecules. Applications in the field of analytical chemistry and biological activity, as well as the anticancer properties of various calixarenes, have been studied and reported by several research groups. Due
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Performance in chemistry of form two national examinations in Zanzibar government schools have not been encouraging since 2009 to date despite several attempts made through additional carefully planned instructional strategies and models to improve the status of teaching and learning chemistry. From the performance data of 31 government schools sampled gotten from the Ministry of
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Cassava is consumed in many tropical countries and is fast becoming the major raw material of many diets, especially in the bakery, brewery and pharmaceutical industries. In a study to determine the effects of various formulations of Cassava feeds on blood lipid profile in rats. Forty adult Wistar rats weighing between 120 and 150 g
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Aims: This study investigates the use of sawdust from 3 hardwood species as low-cost adsorbent for the removal of copper from contaminated water.  Study Design: The experimental design used for this study was 3 x 2 x 4 factorial experiment; the different sawdust species, two baselines (treated and untreated) and four levels of pH and
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Solid-phase microextraction (SPME) coupled with gas chromatography-isotope ratio mass spectrometry (GC-IRMS) has already been applied to collect and identify volatile light hydrocarbons in oil and source rocks.  However, this technology has not yet been used to analyze volatile light hydrocarbons in dry gas (natural gas with C1/C2+>95%). In this study, we developed a method to
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Photochromic 5-phenylpyrazolidin-3-one-basedazomethine imines containing 2-benzylidene 1, 2-(3nitrobenzylidene) 2, 2-(4-nitrobenzylidene) 3, 2-((1H-imidazol-2-yl)methylene) 4, 2-(pyridin-2ylmethylene) 5, 2-(quinolin-2-ylmethylene) 6 and 2-((8-hydroxyquinolin-2-yl)methylene) 7 substituents were synthesized. All the compounds exist in the ring-opened O forms. Under irradiation with light of 365 nm, compounds 1-7 undergo thermally reversible isomerization into ring-closed bicyclic diaziridine isomers C. Azomethine imines 4-6 exhibit properties
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Thallium (Tl) is a non-essential element for human being and is considered as a highly toxic trace element at a concentration above 2 µg/L. To assess the source of thallium contamination in ground and surface waters in the locality of Yamtenga village (11°43’35.1” N and 00°11’50.8” W, Burkina Faso), chemical analyzes of thallium concentrations in
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