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Dissertations / Theses on the topic 'Phytochemical extract'

Author: Grafiati

Published: 7 June 2025

Last updated: 17 July 2025

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1

Bezerra, Gabrieli da Penha. "Phytochemical study bioguided by the myorelaxant activity of the crude extract from stem bark of Hymenaea courbaril L (JatobÃ)." Universidade Federal do CearÃ, 2013. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=10194.

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FundaÃÃo Cearense de Apoio ao Desenvolvimento Cientifico e TecnolÃgico<br>Hymenaea courbaril L. (Fabaceae), popularly known as "Jatoba", is used in folk medicine to treat respiratory diseases such as bronchitis and asthma. This study evaluated the effect of H. courbaril on the contractile of rat isolated trachea, as well as its potential antioxidant and anti-inflammatory, through an interdisciplinary study bioguided by myorelaxant activity of the ethanol extract from stem bark (EEHC). Chromatoghrafic fractionation of EEHC resulted in fractions of increasing polarity: hexane (HF), hexane:dichlo

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2

Deliwe, Mzonke. "Pharmacological evaluation of antidiarrhoeal and antidiabetic activities of Syzygium Cordatum Hochst. ex C. Krauss." Thesis, University of the Western Cape, 2011. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_9985_1351170857.

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Syzygium cordatum is a medicinal plant indigenous to South Africa and Mozambique, commonly used to treat stomach aches, diabetes, respiratory problems and tuberculosis. In spite of the folklore use, adequate scientific data to credit its widespread traditional use is lacking. The objectives of this study were: to evaluate and validate scientifically the successful therapeutic claims by traditional medicine practitioners that Syzygium cordatum is effective in treating diarrhoea and diabetes<br>to determine the effects of the plant extract on gastrointestinal transit of a charcoal meal in mice<b

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3

Makhaba, Masixole. "Phytochemical studies of extracts from Aloe succotrina." University of the Western Cape, 2017. http://hdl.handle.net/11394/6457.

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Magister Scientiae - MSc (Chemistry)<br>Global climate change and geographical differences are two major parameters known to have, either, direct or indirect influence on the production of secondary metabolites in plants, which in-turn may affect the quality and/or quantity of the overall metabolites. The primary purpose of this thesis was to evaluate the phytochemistry of the whole leaf of Aloe succotrina Lam. spp. - a South African native plant - through a chromatographic spectroscopic approach-against available data accumulated for the cultivated population. Preliminary screening of the cru

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4

Marques, Milene Bueno. "Triagem fitoquímica e avaliação da sensibilidade antimicrobiana e da genotoxicidade de Sedum praealtum DC. (Bálsamo)." Universidade Jose do Rosario Vellano, 2015. http://tede2.unifenas.br:8080/jspui/handle/jspui/102.

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Made available in DSpace on 2016-05-02T13:55:21Z (GMT). No. of bitstreams: 1 Milene Bueno Marques-Dissertacao.pdf: 825475 bytes, checksum: cd33a50c8ba95cbc3e9504abcf1d976c (MD5) Previous issue date: 2015-02-25<br>Sedum praealtum DC. (Crassulaceae) is one of 350 species pharmacologically active from the genus Sedum, whose actions in treatment of eyes (pain and swelling) and ulcer, inflammatory problems, as contraception and anti-fertilization, antinociceptive and anti-inflammatory have been reported. The objective was to evaluate the hydroethanolic extract of S. praealtum regarding their pote

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5

Girlus, Elena Valeria. "Protective activity of phytochemicals from natural extracts." Master's thesis, Instituto de Tecnologia Química e Biológica António Xavier. Universidade Nova de Lisboa, 2016. http://hdl.handle.net/10362/43593.

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The rise in the incidence of neurodegenerative diseases leads to an increased demand for the development of alternative therapeutic strategies. Phytochemicals have proved beneficial effects for human health, exerting protective roles towards several diseases including neurodegenerative disorders. Thus, the search for new bioactivities is a field in constant growth. The beet and fruits belonging to Opuntia spp. are rich in betalains and phenolic compounds, which confer several benefits to human health such as regulators of antioxidant and anti-inflammatory responses as well as potential protect

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6

Adefuye, Ogheneochuko Janet. "Anti-diabetic and phytochemical analysis of sutherlandia frutescens extracts." Thesis, Nelson Mandela Metropolitan University, 2016. http://hdl.handle.net/10948/3549.

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In Africa, the importance of medicinal plants in folklore medicine and their contribution to primary healthcare is well recognized. Across the continent, local herbal mixtures still provide the only therapeutic option for about 80% of the population. The vast floral diversity and the intrinsic ethnobotanical knowledge has been the backbone of localized traditional herbal medical practices. In Africa, an estimated 5400 of the 60000 described plant taxa possess over 16300 therapeutic uses. Similarly, with a therapeutic flora comprising of approximately 650 species, herbal medical practitioners i

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7

KHALIL, MOHAMAD. "Phytochemical composition and biological activity of extracts from Lebanese medicinal plants." Doctoral thesis, Università degli studi di Genova, 2020. http://hdl.handle.net/11567/1002418.

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The Mediterranean area especially the eastern part including Lebanon, is rich in term of plant biodiversity, including high valuable medicinal plants that are largely used by people as herbal medicine, these plants represent an important source of plant-derived bioactive compounds, besides, there is a need to characterize these compounds, evaluate their bioactivity and clarify scientifically the use of these plant as traditional and alternative medicine, lack of these information may limit their use, by contrast, studying the compositions and bioactivity of these plants may improve their use,

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8

Takaidza, Samkeliso. "Phytochemical analysis and biological activities of crude extracts from selected Tulbaghia species." Thesis, Vaal University of Technology, 2018. http://hdl.handle.net/10352/434.

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PhD (Department of Biotechnology, Faculty of Applied and Computer Sciences), Vaal Universtiy of Technology<br>The genus Tulbaghia has been used in traditional medicine to treat various ailments such as fever, earache, tuberculosis and esophageal cancer. However, there is limited scientific evidence to support its use. Therefore the objectives of this study were to perform phytochemical analysis, investigate the antioxidant, antimicrobial, anticancer, immunomodulatory activities and toxicity of crude acetone and water extracts from selected Tulbaghia species. Standard methods were used for pr

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9

Smith, Sarah. "The role of reactive nitrogen species and aged garlic extract on platelet function." Thesis, Liverpool John Moores University, 2014. http://researchonline.ljmu.ac.uk/4401/.

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Natural therapies such as Aged Garlic Extract (AGE) have displayed cardioprotective properties, with studies indicating that AGE can inhibit platelet aggregation both in vivo and in vitro. The mechanism of inhibition induced by AGE is proposed to be due to AGE exerting effects upon several targets within platelets, including calcium and cyclic adenosine monophosphate (cAMP). The effect of AGE upon the other cyclic nucleotide, cyclic guanosine monophosphate (cGMP) is currently unknown. The aims therefore of this project are to identify the effect of AGE upon platelet cGMP, as well as associated

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10

Okoh, Omobola Oluranti. "Chemical transformations and phytochemical studies of bioactive components from extracts of Rosmarinus officinalis L." Thesis, University of Fort Hare, 2010. http://hdl.handle.net/10353/354.

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Variations in the yield, chemical composition, antibacterial, and antioxidant properties of the essential oils of Rosmarinus officinalis L. cultivated in Alice, Eastern Cape of South Africa over a period of 12 months using the solvent-free microwave extraction and traditional hydrodistillation methods were evaluated. The GC-MS analyses of the essential oils revealed the presence of 33 compounds with 1,8-cineole, a-pinene, camphor, verbenone, bornyl acetate and camphene constituting about 80 percent of the oils throughout the period of investigation, with the solvent-free microwave extraction m

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11

Silva, Inês Alexandra Marreiros. "Evaluation of chemotherapeutic potential of natural extracts using 3D models of colon cancer." Master's thesis, Faculdade de Ciências e Tecnologia, 2013. http://hdl.handle.net/10362/10982.

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Dissertation to obtain master degree in Biotechnology<br>Recently there is a growing interest in cancer treatment through the use of natural compounds. In particular, phenolic compounds and monoterpenes found in fruits and vegetables are very attractive in the prevention and chemotherapy of various types of cancer. However, many promising compounds previously tested in in vitro cell models fail to demonstrate activity when evaluated in vivo. Therefore, there is an emerging need to develop more robust and reliable cellular models for pre-clinical evaluation of new chemotherapeutic agents. The

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12

Mbandezi, Yamkela. "Evaluation of cytotoxic activity of gold nanoparticles naturally synthesised from South African indigenous medicinal plant extracts." University of the Western Cape, 2018. http://hdl.handle.net/11394/6786.

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>Magister Scientiae - MSc<br>Nanotechnology has emerged as a promising field in the quest to address health conditions. Green nanotechnology is a fairly new branch of nanotechnology, which aims to produce and utilize nanomaterials in a way that is safe for living organisms and their environment. Plant extracts are increasingly used in the green synthesis of gold nanoparticles (AuNPs), which involves the reduction of sodium tetrachloroaurate (III) dehydrate by phytochemicals present in the plant extract. It is probable that the green synthesised AuNPs are more biocompatible than chemically synt

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Hughes, Michael Douglas Jr. "Investigating the Influence of Fresh and Aged Garlic Extracts on the Biosynthesis of Trimethylamine N-Oxide." Diss., Virginia Tech, 2021. http://hdl.handle.net/10919/101785.

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Introduction: Garlic-derived organosulfur compounds are associated with physiological benefits, including the reduction of cardiovascular disease (CVD) risk, possibly by reducing the risk marker trimethylamine-N-oxide (TMAO). TMAO production in humans is largely influenced by the metabolic activity of the intestinal bacteria on dietary precursors including L-carnitine. Dietary supplementation of bioactive garlic phytochemical allicin has recently been suggested to reduce the formation of TMAO precursor molecule trimethylamine (TMA) from L-carnitine through impact on the intestinal bacteria, th

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14

Champagne, Donald Edmond. "Insect antifeedant and growth regulating activity of phytochemicals and extracts from the plant family Meliaceae." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/29069.

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This thesis represents studies on aspects of the defenses against insect herbivores in species of the plant family Meliaceae, particularly with regard to phytochemicals. Methanolic extracts of foliage from thirty species in twenty-two genera were bioassayed for toxicity and growth inhibitory activity against the variegated cutworm, Peridroma sauciaf and for feeding inhibition against the migratory grasshopper, Melanoplus sanguinipes. All but three species were inhibitory to P. saucia, members of the tribe Melieae being most inhibitory. Members of the subfamily Melioideae were more active than

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15

Kumar, Suresh. "In vitro effects of medicinal plant extracts and phytochemicals on factors implicated in Alzheimer's disease." Thesis, University of Newcastle Upon Tyne, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.577147.

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BACKGROUND: Alzheimer's disease (AD) is a complex, multifactorial neurological disorder characterized by an insidious onset with progressive symptoms of memory impairment, language deficit, behavioural problems including agitation, mood disturbances and poor judgment. AD involves multiple pathogenetic factors such as A~ production and aggregation, oxidative stress, tau protein aggregation, metal ions (e.g. Cu2+, Zn2+, Fe2+) and reduced levels of acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE) enzymes. All these factors play important roles in neurodegeneration associated with AD.

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16

Botes, Lisa. "The phytochemical content and anti-diabetic properties of Aloe ferox and Aloe greatheadii var. davyana / Lisa Botes." Thesis, North-West University, 2009. http://hdl.handle.net/10394/4338.

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17

Nkomo, Lindelwa Precious. "In vitro bioactivity of crude extracts of Lippia javanica on clinical isolates of Helicobacter pylori: preliminary phytochemical screening." Thesis, University of Fort Hare, 2010. http://hdl.handle.net/10353/508.

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Helicobacter pylori classified as a class 1 carcinogen is a common human pathogen implicated in certain gastrointestinal diseases. Helicobacter pylori infection is acquired mainly in childhood, especially in developing countries. H. pylori infection causes peptic ulcer, duodenitis, gastritis and cancer. The growing resistance of H. pylori to antibiotics used in its treatment as well as other innate limitations of the triple therapy has necessitated a search for alternative treatment from natural sources which could be readily available, less cost effective. The antimicrobial activity of solven

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18

Piccolomini, André. "Protective effects of hyperbaric pressure-processed whey protein isolate and potato phytochemical extracts on models of gut inflammation." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=106432.

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Inflammatory bowel disease (IBD) is a chronic debilitating disorder characterized by various forms of chronic mucosal and/or transmural intestinal inflammation, which increases the synthesis of the hepatic acute phase proteins contributing to muscle wasting and impaired growth. For the present thesis, in vitro and in vivo models of gut inflammation were used to study the antioxidant and anti-inflammatory effects of native and pressurized whey protein isolate (WPI) and polyphenols, as these nutritional supplements could be used to ameliorate complications of IBD. The antioxidant, anti-inflammat

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19

Harris, Taahir. "Bambara groundnut (Vigna subterranean) from Mpumalanga province of South Africa: phytochemical and antimicrobial properties of seeds and product extracts." Thesis, Cape Peninsula University of Technology, 2017. http://hdl.handle.net/20.500.11838/2789.

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Thesis MTech (Food Technology))--Cape Peninsula University of Technology, 2017.<br>Bambara groundnut (Vigna subterranea) an indigenous legume cultivated in Sub-Saharan Africa has been proclaimed to have medicinal properties from communities and in rural areas. However, there is not enough scientific information to validate these claims. Therefore, this study aimed to identify possible medicinal properties of Bambara groundnut (BGN), by analysing the phytochemical and antimicrobial properties of BGN seed and product extracts from Mpumalanga province within South Africa. The BGN extracts (70% me

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20

Njume, Collise. "Phytochemical analysis and bioactivity of selected South African medicinal plants on clinical isolates of Helicobacter pylori." Thesis, University of Fort Hare, 2011. http://hdl.handle.net/10353/449.

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Medicinal plants have been used as traditional medicine in the treatment of numerous human diseases for thousands of years in many parts of the world. In the developing world, especially in rural areas, herbal remedies continue to be a primary source of medicine. Scientifically, medicinal plants have proven to be an abundant source of biologically active compounds, many of which have already been formulated into useful therapeutic substances or have provided a basis for the development of new lead molecules for pharmaceuticals. Antibiotic resistance, undesireable side effects and expences asso

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21

Helal, Racha [Verfasser]. "Biopharmaceutical investigations of the effects of immune-modulatory plant extracts and phytochemicals on lysozyme expression in human cells / Racha Helal." Berlin : Freie Universität Berlin, 2011. http://d-nb.info/1025490010/34.

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22

Sagbo, Idowu Jonas. "Phytochemical analysis and antibacterial properties of aqueous and ethanol extracts of Brachylaena elliptica (Thurb.) dc. and Brachylaena ilicifolia (Lam.) Phill & Schweick." Thesis, University of Fort Hare, 2015. http://hdl.handle.net/10353/d1021289.

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Resistance of human pathogenic bacterial strains results in selective pressure against known antibiotic. However, plant derived compounds that possess antibacterial potential are currently being investigated for treatment of wound infections in diabetic patients as they are inexpensive and non-toxic. Hence, this dissertation was designed to evaluate two medicinal plants (Brachylaena elliptica and Brachylaena ilicifolia) traditionally used in the treatment of various diseases such as diabetes, and its secondary complications in diabetic patients. The in vitro antioxidant activity of both plants

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23

Tavares, Chanderlei de Castro. "Caracterização química do extrato hexânico das folhas, galhos e frutos de Eschweilera ovalifolia (DC) Nied. (Lecythidaceae)." Universidade Federal do Amazonas, 2014. http://tede.ufam.edu.br/handle/tede/4337.

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Staffa, Pumla. "Anti-tick activities of extracts of Tulbaghia violacea (Alliaceae) cultivated in hydroponic media amended with entomopathogenic fungi (Hypocreales)." Thesis, Cape Peninsula University of Technology, 2018. http://hdl.handle.net/20.500.11838/2830.

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Thesis (MTech (Horticulture))--Cape Peninsula University of Technology, 2018.<br>Ticks and tick-borne diseases are important limiting factors to the attainment of sustainable animal and human health, affecting livelihood of resource poor farming communities in developing countries. Rhipicephalus appendiculatus and Amblyomma variegatum (Ixodidae) are among the most troubling tick species in Africa. While ticks can be controlled by applying chemical acaricides, these chemicals are quite expensive, especially, for small-scale famers in developing countries. Hence, the quest for alternative tick c

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Branco, Cátia dos Santos. "Atividade antiproliferativa de extrato de araucaria angustifolia em células tumorais de laringe HEp-2." reponame:Repositório Institucional da UCS, 2016. https://repositorio.ucs.br/handle/11338/1423.

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Os produtos naturais constituem uma das fontes mais promissoras para o descobrimento de novos ativos na terapêutica do câncer. O carcinoma de laringe é um dos mais comuns tipos de câncer envolvendo as áreas de cabeça e pescoço, e apresenta elevada taxa de morbidade e mortalidade em pacientes com estágio avançado. Terapias alternativas e/ou adjuvantes para o tratamento deste tipo de câncer representam uma necessidade emergente. Uma das alternativas mais promissoras é o desenvolvimento de nanocarreadores contendo ativos antitumorais. Araucaria angustifolia (Bert. O Kuntze) pertence à família Ara

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Oliveira, Isamar Dantas. "Avaliação da atividade biológica do extrato seco da Remiria maritima Aubl." Universidade Federal de Sergipe, 2010. https://ri.ufs.br/handle/riufs/3810.

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Remiria maritime Aubl., popularly known as "capim da praia" is used as teas to treat diarrhea, kidney disease, high fever and analgesic and antiinflammatory. There are no records in the literature about its biological properties. Therefore, this study was designed to evaluate the possible action of the antimicrobial effects, antioxidant, antinociceptive and antiinflammatory effect of aqueous extract of dried sea Remiria Aubl. (ERMA) using tests in vivo and in vitro. The extract was first subjected to tests phytochemicals. Antimicrobial activity was evaluated in vitro by the technique of disk

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27

Vicente, David Gil Marques Borrero. "An overview of the role of cytochrome P450 enzyme system in food-drug interactions and possible applications in veterinary medicine." Bachelor's thesis, Universidade Técnica de Lisboa. Faculdade de Medicina Veterinária, 2009. http://hdl.handle.net/10400.5/1003.

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Dissertação de Mestrado Integrado em Medicina Veterinária<br>Cytochrome P450 enzymes (CYP) are hemoproteins belonging to the group of monooxygenases and one of the main enzymatic systems responsible for drug metabolism. In the present study, in vitro approach was applied to evaluate the relation of CYP-catalyzed activities between human, rabbit, minipig and mouse, using single substrate assays (MultiCYP 7-ethoxycoumarin 0-deethylase (ECOD), CYP1A1/2 7-ethoxyresorufin 0- deethylase (EROD), CYP2A6 coumarin 7-hydroxylase (COH), CYP3A4 midazolam 1- hydroxylase (OH-MDZ), and CYP2E1 chlorzoxaz

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Ameni, Aline Zancheti. "Estudo do extrato fluido de Casearia sylvestris: constituintes químicos, potencial terapêutico e interações medicamentosas." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/10/10133/tde-13112015-105253/.

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A planta Casearia sylvestris é catalogada como planta medicinal de interesse ao SUS, indicada para o tratamento de gastrite e como cicatrizante, para ser utilizada na forma de infusão ou compressas. Assim, foi objetivo deste estudo avaliar o potencial terapêutico antiulcerogênico do extrato fluido (EF), extrato metanólico (EM) e fração diclorometano (FDM), pelo modelo de indução de úlcera por etanol-acidificado. Realizou-se também a análise fitoquímica objetivando identificar os compostos ativos presentes nos extratos, através de técnicas de cromatografia, espectrometria de massas e ressonânci

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Al-Marby, Adel [Verfasser], and Claus [Akademischer Betreuer] Jacob. "Nematicidal and antimicrobial evaluation of extracts, nanosized materials and fractions of selected plants and the identification of the bioactive phytochemicals / Adel Al-Marby ; Betreuer: Claus Jacob." Saarbrücken : Saarländische Universitäts- und Landesbibliothek, 2017. http://d-nb.info/1142919730/34.

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Almada, Carine Nunes de. "Atividade antioxidante do extrato etanÃlico de folhas de azeitona da terra (Syzygium Cumini L.) e seu efeito contra estresse induzido por paracetamol." Universidade Federal do CearÃ, 2013. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=10229.

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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico<br>Syzygium cumini is a plant originated from India and adapted in Brazil, popularly known as black plum, jambolan and jamun. In this study, the antioxidant and protective activities of ethanolic leaves extract of Syzygium cumini (EE) were evaluated on paracetamol-induced liver damage in mice. The total antioxidant activity was determined by ABTS and DPPH methods and the content of vitamin C, extractable polyphenols, anthocyanins, yellows flavonoids and carotenoids were evaluated by different methods. The toxicity of EE was evaluat

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Andreu, Vanessa. "Valorisation de plantes invasives et rudérales : développement de biofongicides utilisables en phytoprotection." Thesis, Montpellier, 2015. http://www.theses.fr/2015MONTS004.

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Avec la prise de conscience de l'impact environnemental et sanitaire des pesticides et l'apparition de phénomènes de résistance face à ces produits, les exigences règlementaires européennes (UE 1107/2009) encadrant leur mise sur le marché sont de plus en plus drastiques. Pour répondre à ces exigences, de nouveaux types de produits de protection des cultures font leur apparition : les bio-pesticides, ou produits de biocontrôle. Il s'agit de produits naturels d'origine végétale, animale ou microbienne, à priori moins rémanent et impactant pour l'environnement que les pesticides conventionnels. C

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Miranda, Maria Augusta Ferraz Machado. "Atividades biológicas de duas espécies de Myrsine L. (Primulaceae) e de Tithonia diversifolia (Hemsl.) A. Gray (Asteraceae)." Universidade Federal de São Carlos, 2015. https://repositorio.ufscar.br/handle/ufscar/1855.

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Made available in DSpace on 2016-06-02T19:30:13Z (GMT). No. of bitstreams: 1 6774.pdf: 4696015 bytes, checksum: 084c02944eff3cb2f25b1db2ce63280b (MD5) Previous issue date: 2015-03-31<br>Financiadora de Estudos e Projetos<br>Plants species from Brazilian savanna often have defense mechanisms in response to the low nutrient content of the soil, the light intensity, the competition for resources and drought, pronounced by deep water deficit, to which they are subjected. This area is a potential source of bioactive compounds that still little explored and potential phytochemical studies of these

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Andreu, Vanessa. "Valorisation de plantes invasives et rudérales : développement de biofongicides utilisables en phytoprotection." Electronic Thesis or Diss., Montpellier, 2015. http://www.theses.fr/2015MONTS004.

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Avec la prise de conscience de l'impact environnemental et sanitaire des pesticides et l'apparition de phénomènes de résistance face à ces produits, les exigences règlementaires européennes (UE 1107/2009) encadrant leur mise sur le marché sont de plus en plus drastiques. Pour répondre à ces exigences, de nouveaux types de produits de protection des cultures font leur apparition : les bio-pesticides, ou produits de biocontrôle. Il s'agit de produits naturels d'origine végétale, animale ou microbienne, à priori moins rémanent et impactant pour l'environnement que les pesticides conventionnels. C

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HEJNA, MONIKA. "PLANT-BASED STRATEGIES TO CONTROL THE ZINC AND THE COPPER OUTPUT FROM SWINE LIVESTOCK." Doctoral thesis, Università degli Studi di Milano, 2021. http://hdl.handle.net/2434/821594.

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The current state of agriculture, where demand for safe food is increasing rapidly as a consequence of growing population, raises a number of questions related to the one health approach and sustainable animal production with minimal impact on the environment. Swine production is an important branch of food production where weaning is the most vulnerable phase for piglets, often associated with decrease of growth performance and diarrhoea. The maintenance of gut health is therefore a complex endeavour where nutrition is crucial in order to reduce the intestinal disorders. Antimicrobial resista

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Omena, Cristhiane Maria Bazílio de. "Atividade antioxidante e anticolinesterase dos extratos etanólicos dos frutos: Siriguela Spondia purpurea Linnaeus; Umbu Spondia tuberosa Arruda; Genipapo Genipa americana Linnaeus e Mangaba Hancornia speciosa Gomes." Universidade Federal de Alagoas, 2012. http://www.repositorio.ufal.br/handle/riufal/2031.

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Ethanol extracts of “jenipapo” (Genipa americana Linnaeus), “umbu" (Spondia tuberosa Arruda), “siriguela” (Spondia purpurea Linnaeus) and “mangaba” (Hancornia speciosa Gomes) were prepared from separate pulp, seeds and peel; except mangaba which are used pulp and peel. The investigation of antioxidant capacity of the ethanol extracts were carried out by the methods of determining the content of ascorbic acid and total phenolics; scavenging 2, 2 -diphenyl-1-picrilhydrazyl and 2, 2’- azinobis (3-ethylbenzothiazoline-6-sulfonic acid) radical, antioxidant capacity of reduction of iron and copper

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Maciel, Mônica Jachetti. "Atividade antibacteriana de antibióticos, de desinfetantes e de extrações vegetais sobre Salmonella padrão e Salmonelas isoladas em produtos de origem animal." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/131252.

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O gênero Salmonella constitui um problema para a saúde animal e humana. Com a finalidade de evitar a ocorrência da transmissão deste microrganismo e a interrupção da doença provocada por eles, deve-se utilizar desinfetantes e antibióticos. A exposição continuada a estes agentes pode resultar no surgimento de resistência microbiana. Tendo em vista este fenômeno, a pesquisa por novos agentes antimicrobianos a partir de extratos vegetais se faz necessária, pois existe a possibilidade de se encontrar substâncias eficazes contra a resistência de micro-organismos já disseminados no ambiente. Os obje

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Talag, Agela Hussain Mohammed. "Phytochemical investigation and biological activities of Sanicula europaea and Teucrium davaeanum : isolation and identification of some constituents of Sanicula europaea and Teucrium davaeanum and evaluation of the antioxidant activity of ethanolic extracts of both plants and cytotoxic activity of some isolated compounds." Thesis, University of Bradford, 2016. http://hdl.handle.net/10454/14482.

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The aim of this research was to investigate the phytochemistry of two species Sanicula europaea and Teucrium davaeanum which are traditionally used in treatment of wounds. Four compounds were isolated from the 80% methanolic extract of S. europaea; bis-(2-ethylhexyl) phthalate (1), palmitic acid (2), rosmarinic acid (3), saniculoside N (4). Compounds 1 and 2 were isolated for the first time from this species. The structure elucidation of the isolated compounds was on the basis of 1D, 2D NMR spectroscopy and mass spectrometry measurements. Two compounds were isolated from the crude glycosides e

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MORAES, Leslivan Ubiratan de. "Identificação e descrição morfoanatômica e farmacognóstica das folhas de Solamum Scuticum M. Nee e bioatividade de extrato bruto em microorganismos e da fração alcaloídica em células cultivadas da linhagem vero." Universidade Federal de Goiás, 2008. http://repositorio.bc.ufg.br/tede/handle/tde/1240.

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Made available in DSpace on 2014-07-29T15:16:27Z (GMT). No. of bitstreams: 1 Dissert Leslivan Ubiratan de Moraes.pdf: 723767 bytes, checksum: 88adcd404b3c30cc9f22d95b44bd13b3 (MD5) Previous issue date: 2008-04-16<br>The jurubeba was identified that such species was Solanum scuticum M. Nee, from which pharmacognostic and morphanatomic data were not available to Goiás. Because of that, we tried some complementary data. For the morphoanatomic evaluation of the leaves some cuts were carried out as described by Kraus and Arduin (1997). For the phytochemical trial, it was used some methodologies a

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Yu, Shiou-Cherng, and 余修誠. "Phytochemical Characterics and its Effect on Protein Tyrosine Phosphatase 1B of Guava Leaf Extract." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/93g5c9.

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碩士<br>亞洲大學<br>保健營養生技學系<br>105<br>The hypoglycemic potency of guava leaf extract has been reported repeatedly by many research groups. This research was carried out with a focus on purifying the hypoglycemic compounds that reside in the aqueous partition of guava leaf extract, since our laboratory has identified the aqueous partition possesses the most potent hypoglycemic properties in in vivo. The chemical properties, phenol/flavonoid contents and 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging ability, of those partitions were similar to other reports. The aqueous partition has the

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Puwavicheanchai, Prokprae, and 卜瑋彩. "Phytochemical compounds and chemoprotective effect of dried Siraitia grosvenorii fruit extracts." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/42275366936480282846.

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碩士<br>國立屏東科技大學<br>熱帶農業暨國際合作系<br>102<br>The fruits of Siraitia grosvenorii (Luo Han Kuo), belonging to family Cucurbitaceae, are traditional Chinese medicine and edible plant cultivated in south-western China. S. grosvenorii fruit extracts have been approved generally recognized as safe (GRAS) status by the Food and Drug Administration of the United States (USFDA). The effects of extraction solvents (hot water and 80% ethanol) in dried fruit flesh and peel extraction and effects of yeast strains (Saccharomyces bayanus and S. cerevisiae) and fermentation time in dried fruit flesh and peel fermen

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Thorburn, Anzelle. "Phytochemical analysis and antimicrobial activity of Piper capensis L.f." Diss., 2011. http://hdl.handle.net/2263/25752.

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Medicinal plants are the focus of intense study, in particular whether their traditional uses are supported by real pharmacological effects, or merely based on folklore. Piper capense L.f. (Piperaceae) is used traditionally for the treatment of infectious diseases, and has the potential to be a source of novel antimicrobial compound(s). Crude solvent extracts (water, methanol, hexane and acetone) and sequentially extracted subfractions of the root-bark of P. capense were prepared, of which the hexane-soluble subfraction MsAsHs was identified as the most promising antimicrobial subfraction. Phy

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Lin, Chi-Yang, and 林啟洋. "Antioxidant activities and phytochemicals of leaf extracts from indigenous Rhododendron in Taiwan." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/82968234811713756159.

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碩士<br>國立中興大學<br>森林學系所<br>101<br>Rhododendron is not only one of the most famous ornamental plants in the world, but also it is a traditionally medicinal plant. However the potential bioactivities of indigenous Rhododendron in Taiwan have not yet been studied completely to date. In this study, a number of in vitro assays, including DPPH radical scavenging assay, superoxide radical scavenging assay, ferrous-ion chelating activity and reducing power assay, were performed to evaluate the antioxidant activities of methanolic extracts from the leaves of 10 indigenous Rhododendron species in Taiwan.

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Dhoke, Namerta Dilip. "Prospecting for batanical pesticides:Evaluation of plants extracts for phytochemicals and biological activity." Thesis, 2008. http://localhost:8080/iit/handle/2074/3677.

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Castro, Vera Patrícia Ribeiro de. "Phytochemical characterization, antioxidant properties and neuroprotective effect of plant extracts from Caatinga biome (Brazil)." Master's thesis, 2014. http://hdl.handle.net/10348/5551.

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Dissertação de Mestrado em Biologia<br>As doenças neurodegenerativas têm sido um foco da ciência com o objetivo de desenvolver novas estratégias neuroprotetoras capazes de prevenir a morte neuronal associada a estas patologias. A identificação de plantas medicinais tem sido alvo de vários investigadores com a finalidade de encontrar novas fontes de compostos com propriedades farmacológicas. O Brasil, nomeadamente o bioma Caatinga, é rico em plantas medicinais sendo estas utilizadas pelos habitantes locais na medicina tradicional. Tendo isto em conta, os objetivos deste trabalho foram: 1) cara

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Hung, Mei-jen, and 黃美仁. "The antioxidant effects of propolis, Lithospermun erythrorhison, Angelica sinensis, and Aloe vera phytochemical extracts." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/56402405819286363648.

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碩士<br>南華大學<br>自然醫學研究所<br>93<br>Antioxidants are reported to improve wound healing and protect tissues from oxidative injury. This study was designed to evaluate the in vitro antioxidant capacity of propolis, Lithospermun erythrorhison, Angelica sinensis, Aloe vera and formula using different antioxidant tests, including free radical scavenging, metal chelating activities, reducing power, total antioxidant activity, and lipid peroxidation. Experimental results indicated that the antioxidant activities increased with concentrations. Among all extracts, propolis, Lithospermun erythrorhison and fo

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Ngo, Thanh. "Maximisation of extraction of phytochemicals from Salacia chinensis L. and encapsulation of its enriched extract." Thesis, 2020. http://hdl.handle.net/1959.13/1411330.

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Research Doctorate - Doctor of Philosophy (PhD)<br>Salacia chinensis L., a common species in genus Salacia, is distributed in many Asian countries, such as China, Vietnam, India and Sri Lanka. For thousands of years, S. chinensis has been used for the prevention and treatment of various illnesses including arthritis, inflammation, diabetes, obesity and liver disorders. Studies have shown that S. chinensis has relatively high content of bioactive compounds, such as total phenolics and total flavonoids as well as strong antioxidant properties. Numerous individual compounds, isolated and identifi

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Ndou, Nzumbululo. "Evaluation of phytochemical constituents and mutagenic properties of Coccinia rehmanni And Jatropha zeyheri Plant Extracts." Diss., 2019. http://hdl.handle.net/11602/1312.

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MSc (Microbiology)<br>Department of Microbiology<br>Background: The medicinal value of plants lies in some chemical substances that produce a definite physiological action in the human body. The secondary metabolites help the plants to survive hash conditions and could be used by humans as supplements of their health, as foods additives or for medicinal purposes. This bioactive compounds are not always beneficial to human beings, and some of this plants bioactive compounds can be toxic or genotoxic to human cells. This study used several methods to evaluate of phytochemical constituents

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Nobaza, Kwindla Handy. "Extraction of Atropine and Scopolamine from Datura ferox and Datura stramonium.L and sample clean-up using molecularly imprinted polymers." Thesis, 2014. http://hdl.handle.net/10210/12097.

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M.Sc. (Chemistry)<br>The extraction of the atropine and scopolamine alkaloids from both Datura ferox and Datura stramonium was carried out in this study to investigate potential of these plants as a source of these alkaloids. Tropane alkaloids such as atropine occur naturally in many members of several plant families, especially the Solanaceae, Erythroxylaceae, Proteaceae and Convolvulaceae families. Hyoscyamine or its racemic mixture atropine is used as an antidote to organophosphate insecticides, or as a nerve agent to dilate the pupil for retina examinations. Scopolamine or hyoscine is used

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Ndlovu, Lungile Melly. "Phytochemical screening, cytotoxicity and anticancer activity of Lobostemon fruticosus extracts on human lung cancer cell line." Thesis, 2015. http://hdl.handle.net/10539/18523.

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A dissertation submitted to the Faculty of Science, University of Witwatersrand, Johannesburg, in fulfilment of the requirements for the degree of Master of Science. March 2015<br>Lung cancer is currently the most deadly form of cancer due to the fact that metastasis occurs in the lymph nodes making it difficult to remove by surgical means. Chemotherapy has been the most successful method of treatment, although it has been harmful to human health as a consequence of non-specific cytotoxicity. There has been, therefore, a growing interest in cancer research to develop alternative cancer treatme

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Tau, Endy. "The effect of drying and storage on the quality of cosmeceutical species Leucosidea Sericea and Greyia Flanaganii." Diss., 2018. http://hdl.handle.net/10500/25967.

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The use of plants for cosmeceutical applications is becoming more important since “safer” and more “natural” skin products are gaining popularity. The effect of different drying methods and storage conditions on metabolite changes and biological activity of two species with cosmeceutical application namely Greyia flanaganii and Leucosidea sericea were investigated using 1H-NMR metabolomics. The multivariate analysis (PCA and OPLS-DA), and 1H-NMR sample spectra were used to analyse the significant differences (P<0.05) resulting from the different treatments. The effect of these treatments on an

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