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 116 for “"Plant extracts"”.
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The Isolation of Natural Products From Plant Extracts
Bioassay-guided fractionation of the ethyl acetate extract of Virola sp. (Myristicaceae) using the Sc7 yeast strain resulted in the isolation of the weakly cytotoxic biochanin A (an isoflavone compound). The bioassay of three mutant yeast strains (1138, 1104, and 1353) directed the isolation of …
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Guayule plant extracts as binder modifiers in flexible (asphalt) pavement mixtures
<p>"The guayule (pronounced, 'why-YOO-lee') plant is a woody perennial shrub that is native to areas of the southwestern United States and northern Mexico, and is a well-documented source of high-quality natural rubber. The U.S. needs a domestic source of natural rubber to allay concerns about its …
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The cytotoxic effect of higher plant extracts on recurrent ovarian cancer cells
… become recurrent due to drug resistance. Higher plant extracts are known to have anticancer effects. The aim of this investigation is to test higher plant extracts against platinum-sensitive and platinum-resistant ovarian cancer cells to show if they have a toxic effect and if they could be used …
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Effects of plant extracts on immune function and disease resistance in pigs
Plant extracts (PE) are bioactive substances, extracted from some foods or traditional herbs. It has been known that PE possess antioxidant, antibacterial, anti-inflammatory, and perhaps immunoregulatory effects. The 3 studies below demonstrate the anti-inflammatory effects of PE in vitro and the …
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Synergistic effects of mixtures of fungicides and medicinal plant extracts against Botrytis cinerea
We hypothesize that South African medicinal plants contain compounds that can act in synergism with synthetic antifungal compounds. Four fungicides - Sporekill™, Rovral™, Terminator™ and Teldor™ at doses 0.1, 0.2, 0.4 and 0.8 mL L-1 and plant species Galenia africana, Elytropappus rhinocerotis and …
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The role of plant extracts on islet function in vivo and in vitro
Plant-derived extracts have been used as folk remedies for Type 2 diabetes mellitus (T2DM) for many centuries, and offer the potential of cheap and readily available alternatives to conventional pharmaceuticals in developing countries. Extracts of Gymnema sylvestre (GS) and Costus pictus (CP) are …
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An assessment of medicinal hemp plant extracts as natural antibiotic and immune modulation phytotherapies
… the antimicrobial efficacy of medicinal hemp plant extracts to determine the antibacterial effects of indigenous Sansevieria species and exotic Cannabis sativa phytotherapy varieties. This study also assessed whether aqueous o
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The toxicity and repellent properties of plant extracts used in ethnoveterinary medicine to control ticks
Six plant species (Aloe ferox, Aloe marlothii, Clerodendrum glabrum, Jatropha curcas, Ricinus communis and Strychnos madagascariensis) used by communities in the northern parts of South Africa to control ticks on livestock were selected from the database of the Onderstepoort Veterinary Institute. …
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Protective effect of dietary antioxidants and plant extracts on acute inflammation and hepatotoxicity in vitro
… potency than that of carotenoids and vitamins. Extracts from selected plants and plant byproducts may represent rich sources for one or more of such antioxidants and therefore exhibit higher effects than a single antioxidant due to the synergistic effects produced between such antioxidants. …
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Synthesis and Characterisation of Metallic Nanoparticles from Medicinal Plant Extracts and their Application in combating Antibiotic-Resistant Bacterial Pathogens
… metallic nanoparticles (MNPs) from medicinal plants. Integrating nanoparticle-based strategies with medicinal plants demonstrates considerable promise in addressing RTIs. Methodology: The present study investigated the extracts of Spirostachys africana (S. africana), a medicinal plant …
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Incorporation of selected plant extracts into edible chitosan films and the effect on the antiviral, antibacterial and mechanical properties of the material
… antimicrobials has also increased. Plant extracts such as grape seed and green tea extracts are known to have antiviral as well as antibacterial activities. Even though there are several researches that have investigated the use of edible films and coatings as carriers of …
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Microbial Safety, Shelf Life Stability, Quality Preservation, and Consumer Acceptance of Vacuum-infused, Irradiated Chicken Breast Meat Treated with Natural Plant Extracts and Organic Acids
… of vacuum-infused organic acids and select plant extracts for use in conjunction with electron beam irradiation at low levels as antimicrobials in a multiple hurdle approach to poultry decontamination and as antioxidants to mitigate the irradiation dose-dependent quality defects. This …
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Color stability and phenolic composition from corn pericarp extracts in a beverage model and protective and anti-inflammatory potential of anthocyanin-rich plant extracts on celiac disease in vitro
… anthocyanin-rich color corn variety pericarp extracts and the objectives of phase II were to evaluate the potential of anthocyanin-rich plant extracts to protect human epithelial cells against a celiac toxic peptide (CTP) and to compare the effect of different anthocyanin extracts on …
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Pharmacogenetic analysis of admc polymorphisms affecting the efficacy of TB treatment in tuberculosis patients from Tanzania and Uganda, and pharmalogical evaluation of potent medicinal plant extracts used in the treatment of tuberculosis
… less harmful than current regimens, medicinal plants are being explored for their potential to produce compounds with anti-TB properties. Therefore, it was hypothesised that the effectiveness of anti-TB drugs may also depend on an individual's ADME polymorphisms. Aim: This study was aimed at …
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Isolation and Synthesis of Bioactive Compounds from Plants
… for Hepatitis and Virus Research (IHVR), twelve plant extracts were investigated for their antiproliferative activity against the A2780 cell line, three plant extracts were investigated for their antimalarial activity against Plasmodium falciparum, and three plant extracts were investigated for …
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Investigating the therapeutic effects of silver and gold nano particles capped with selected medicinal plants against tuberculosis
… nanoparticles capped with selected medicinal plant extracts against Mycobacterium tuberculosis. Methodology: P. africanum and Z. mucronata barks and leaves were collected in the Vhembe district of Limpopo. Plant phytochemical constituents were extracted using distilled water and absolute …
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