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New fluorescence spectroscopic method for the simultaneous determination of alkaloids in aqueous extract of green coffee beans

‑Abshiro 0 Bhagwan Singh Chandravanshi 0 0 Department of Chemistry, College of Natural Sciences, Addis Ababa University , P.O. Box 1176, Addis Ababa , Ethiopia Background: There is no fluorescence

Development of new analytical methods for the determination of caffeine content in aqueous solution of green coffee beans

Redi‑Abshiro 0 Bhagwan Singh Chandravanshi 0 0 Department of Chemistry, College of Natural Sciences, Addis Ababa University , P.O. Box 1176, Addis Ababa , Ethiopia Background: This study was conducted

Preparative HPLC for large scale isolation, and salting-out assisted liquid–liquid extraction based method for HPLC–DAD determination of khat (Catha edulis Forsk) alkaloids

Background Khat (Catha edulis Forsk) is an evergreen shrub of the Celastraceae family. It is widely cultivated in Yemen and East Africa, where its fresh leaves are habitually chewed for their momentary pleasures and stimulation as amphetamine-like effects. The main psychostimulant constituents of khat are the phenylpropylamino alkaloids: cathinone, cathine and norephedrine...

Non-destructive determination of ethanol levels in fermented alcoholic beverages using Fourier transform mid-infrared spectroscopy

‑Abshiro 0 Bhagwan Singh Chandravanshi 0 0 Department of Chemistry, Addis Ababa University , P.O. Box 1176, Addis Ababa , Ethiopia Background: Traditional fermented alcoholic beverages are indigenous to a

Removal of trivalent chromium from aqueous solution using aluminum oxide hydroxide

Water is second most essential for human being. Contamination of water makes it unsuitable for human consumption. Chromium ion is released to water bodies from various industries having high toxicity which affects the biota life in these waters. In this study aluminum oxide hydroxide was tested for its efficiency to remove trivalent chromium from aqueous solutions through batch...

Levels of heavy metals in the raw and processed Ethiopian tobacco leaves

Tobacco (Nicotiana tabacum L.) is a commercial plant. Tobacco leaves naturally accumulate and concentrate relatively high levels of heavy metals and particular cadmium in leaves. Tobacco is one of the basic agricultural products, in Ethiopia, with social and economic importance. However, there is no report in the literature on the determination of levels of heavy metals in...

Bio-ethanol production from wet coffee processing waste in Ethiopia

Large amounts of coffee residues are generated from coffee processing plants in Ethiopia. These residues are toxic and possess serious environmental problems following the direct discharge into the nearby water bodies which cause serious environmental and health problems. This study was aimed to quantify wet coffee processing waste and estimate its bio-ethanol production. The...

Levels of nicotine in Ethiopian tobacco leaves

Tobacco is a valuable cash crop. It is the most widely grown non-food crop in the world. Tobacco use is widespread due to its addictive nature of its main constituent nicotine. Therefore, the knowledge of nicotine level in tobacco is important to tobacco industry and in the area of toxicology to control its harmful effect on health. There is no report in the literature on...

Assessment of selected nutrients and toxic metals in fruits, soils and irrigation waters of Awara Melka and Nura Era farms, Ethiopia

The objective of the present study was to determine the levels of essential nutrients (Na, K, Ca, Mg, Fe, Cu, Zn, Mn) and toxic metals (Pb and Cd) in selected varieties of fruits (banana, grape, guava, mandarin and orange), farmland soils and irrigation waters to assess nutritional impact on health. The freeze dried fruits were digested using HNO3 and HClO4 and the levels of the...

Levels of essential and non-essential metals in ginger (Zingiber officinale) cultivated in Ethiopia

Background Ginger (Zingiber officinale Roscoe) is a common condiment for various foods and beverages and widely used worldwide as a spice. Its extracts are used extensively in the food, beverage, and confectionary industries in the production of products such as marmalade, pickles, chutney, ginger beer, ginger wine, liquors, biscuits, and other bakery products. In Ethiopia, it is...

Levels of selected metals in leaves of Cannabis sativa L. cultivated in Ethiopia

Background Cannabis sativa L. is one of the illicit drug bearing plants. Cannabis products are the most widely trafficked drugs worldwide. The highest levels of cannabis production in the world take place in the African continent. A small volume of cannabis is produced in rural areas of Ethiopia, of which a small portion is exported to neighboring countries and the majority is...