Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 175 for “"Phytochemical"”.
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Phytochemical studies of Helichrysum patulum
Since Helichrysum is known by the indigenous people of Africa for therapeutic properties, such as against colds, flu and wounds, the aim of this study was to focus on the patulum species found predominantly in the Western Cape region of South Africa and by means of isolation and identification of …
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Profiling phytochemical and nutritional components of potato
Potatoes (Solanum Tuberosum L.) contain secondary metabolites that may have an impact on human health. The aim of this study was to assess the levels of some of these compounds in a wide range of varieties, including rare, heritage and commercial cultivars. Vitamin C, total carotenoids, phenolics, …
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Phytochemical diversity and genetics of purple corn
… stability in a model beverage. Given the unique phytochemical diversity present in AR, a large-scale AR mapping population was created and genotyped using genotyping-by-sequencing, and phenotyped for flavonoid content using HPLC. GWAS (genome-wide association studies) revealed several candidate …
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Phytochemical mediated resistance in sweetpotato to sweetpotato weevils
… potato weevils (Cylas spp.) and investigated the phytochemicals that mediated this defence. New Kawogo, LIR302 and ARA228 were shown to be the most resistant based on stem and root damage. Significant differences were observed on the number of faecal droppings, feeding holes and eggs laid on the …
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Antioxidant activity and phytochemical evaluations of selected medicinal plants
The methanolic crude extract of aerial parts of the plant Scrophularia nodosa was shown to have potent DPPH radical scavenging activity (IC50 = 48.75 ± 7.00 μg/ml). Activity-guided fractionation resulted in the isolation of three principal antioxidant compounds; acteoside, angoroside C and …
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A Phytochemical Analysis of Secondary Metabolites in Eupatorium Serotinum
<p>Phytochemistry, a subset of Natural Products Chemistry, studies chemically derived products from natural substances. Advances in this field have important applications in medicinal research due to the distinctive and unique properties of natural compounds. All metabolites are produced from the …
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Phytochemical studies on traditional medicinal plants with antimalarial activities
The active antimalarial principles of three traditional medicinal plants, Passerina obtusifolia (Thymelaeaceae), Tetradenia riparia (Labiatea) and Xerophyta retinervis (V elloziaceae) were investigated by employing bioassay guided fractionation. Two novel compounds and five known constituents were …
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Phytochemical, biological and toxicity studies of terminalia sericea burch. (Combretaceae)
Terminalia sericea Burch. ex. DC (Combretaceae) is one of the 50 most popular medicinal plants in Africa. The fruit, leaves, stems and roots are commonly used for the treatment of cough, skin infections, diabetes, diarrhoea, venereal diseases and tuberculosis. However, the roots are most commonly …
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Phytochemical and pharmacological studies on some endemic Yucatecan medicinal plants
… to genera with little pharmacological and phytochemical reported information and used for medicinal purposes by local communities were selected. The species selected included Jacquinia flammea Millsp. ex Mez, Sideroxylon foetidissimum Jacq. subsp. gaumeri, Serjania yucatanensis Standl., and …
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Phytochemical Investigations of Fungi: Hydrogen-Cyanide, Indole Alkaloids and Carbohydrates
The biology and chemistry of fungal secondary metabolites including hydrogen cyanide, indole alkaloids and reserve carbohydrates were investigated. The major emphasis of this study concerned the taxonomic significance and the mechanism of HCN production by microorganisms, especially fungi.
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Phytochemical Investigation and Bioactivity Assessment of Medicinal Plant from Northern Nigeria
Boswellia dalzielii (Burseraceae) has ethnopharmacological importance and is claimed to have anti-infection and immunomodulatory effects. In the Northern part of Nigeria, a region with a tropical dry climate, an aqueous infusion of this plant is used in the treatment of infections and tumours. The …
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Phytochemical studies on natural products and their biological activities against Trypanosoma
… different types of propolis by employing various phytochemical methods, including VLC, CC, SEC, preparative TLC.;All crudes extracts, fractions as well as 12 isolated compounds then were subjected for biological testing against Trypanosoma, T. brucei S427 WT, and their cytotoxicity against …
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Phytochemical Investigation and Drug Interaction Potential of <em>Cyanotis vaga</em>
<em>Cyanotis. vaga</em> (Lour.) Schult, & Schult. f. (<em>C. vaga</em>) previously called <em>Tradescantia vaga</em> and <em>Cyanotis barbata</em>, is a perennial herb. It is native to Eastern Asia and Tropical Africa. It has been reported that its decoction reduces fever and enhances well-being. …
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Ameliorative effects of phytochemical ingestion on viral infection in honey bees
… of vectoring viruses. Plant-derived chemicals (phytochemicals) represent a broad range of substances that honey bees frequently encounter and consume, many of which are known to improve honey bee health, although their effect on bee viruses is largely unknown. This thesis project tested the …
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Shedding Light on Phytochemical Diversity: Photochromism of chromenes isolated from Piper kelleyi
… mode of reactivity in the composition of plant phytochemical diversity been established. Chapter 2 will establish the nature of the photochemical behavior of a common naturally occurring structural motif, which could be a light activated pharmacophore that could be responsible for its potent …
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Phytochemical analysis and selected biological activity of Phyllanthus parvulus Sond. var garipensis
… Phyllanthus parvulus Sond. var garipensis. The phytochemical study reveals that the plant possesses some secondary metabolites namely: alkaloids, saponins, flavonoids, tannins and antraquinones. A compound lanosterol-amide linked glycoside was isolated from the ethyl acetate fraction. The …
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Phytochemical and toxocological studies of some Botswanan plants used in traditional medicine
… selection of these plants are being investigated phytochemically and toxicologically. These include: Jatropha erythropoda Pax. (Euphorbiaceae), Cassia italica (E11. ) Lam. Ex. (Leguminosae), Asclepiasfruticosa L. (Asclepiadaceae), Albizzia brevifolia Schinz (Leguminosae), Argemone mexicana L. …
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ULTRASONIC APPLICATIONS- PHYTOCHEMICAL ANALYSES OF SOME MEDICINAL NATURAL PRODUCTS IN FOOD PLANTS
There are concerns about using synthetic phenolic antioxidants such as butylated hydroxytoluene (BHT) and butylated hydroxyanisole (BHA) as food additives because negative effects to human health have been reported. thus, a replacement of these synthetics by antioxidant extractions from various …
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