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Dissertations / Theses on the topic 'Phytochemical'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Swartz, Vuyiswa Gladys. "Phytochemical studies of Helichrysum patulum." Thesis, University of the Western Cape, 2006. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_3651_1189147447.

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<p>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 the plant constituents, be able to relate the therapeutic activity on the basis of literature precedents, to the compounds extracted.</p>

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2

Nqolo, Nandipha Lucia. "Phytochemical study of Rhoicissus tomentosa." Thesis, University of the Western Cape, 2008. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_3223_1263940394.

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<p>This investigation focused on Rhoicissus tomentosa, belonging to the family, Vitaceae in an attempt to assess the phytochemistry of this plant which is widely used by traditional healers in South Africa to ensure the safe delivery during pregnancy and childbirth (Hutchings et al., 1996).</p>

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3

Latip, Jalifah. "Phytochemical studies on Australian Rutaceae." Thesis, University of Strathclyde, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366989.

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4

Seneviratne, G. Idrani. "Phytochemical survey of cultivated Vigna species." Thesis, University of Reading, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314782.

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5

Shaari, Khozirah. "Phytochemical studies on the Malaysian Flacourtiaceae." Thesis, University of Strathclyde, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296099.

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6

Zhou, Kequan. "Phytochemical profiles and antioxidant properties of wheat." College Park, Md. : University of Maryland, 2005. http://hdl.handle.net/1903/2729.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2005.<br>Thesis research directed by: Food Science. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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7

Araim, Ghada. "Phytochemical induction in Echinacea purpurea (L) Moench." Thesis, University of Ottawa (Canada), 2007. http://hdl.handle.net/10393/27440.

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Purple coneflower, Echinacea purpurea (L.) Moench, is an important phytomedicinal species, producing phenolics and alkamides which have medicinal properties. This study examined the contribution of arbuscular mycorrhizal (AM) colonization on the physiology and biochemistry of E. purpurea, alone or in combination with jasmonic acid (JA), and over time. It was hypothesized that AM colonization enhances growth, nitrogen assimilation and secondary metabolism in E. purpurea. It was also hypothesized that JA application alone, or in combination with AM colonization, and growth time increases the ph

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8

Mwangi, Henry Maina. "Phytochemical and antimicrobial studies on Rhus natalensis." Thesis, University of the Western Cape, 2011. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_3552_1365671232.

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<p>Extracts from the root bark, stem bark, and leaves of R. natalensis were screened for antibacterial activity against standard bacterial strains<br>Staphylococcus aureas, Escherichia coli and Pseudomonas aureginosa, and fungi<br>Candida albicans, Trichophyton mentagrophytes or Microsporum gyseum. Chromatographic techniques were utilized to isolate pure compounds. This study validates and documents, in a systematic way, the antimicrobial properties of the R. natalensis used for many years by many people of the world. It also provides valuable information for&nbsp<br>further phytochemical isol

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9

Brown, Paula Naomi. "Cranberry metabolomics : new approaches for phytochemical characterizations." Thesis, University of British Columbia, 2011. http://hdl.handle.net/2429/39867.

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There is a long history of use and modern commercial importance of large (Vaccinium macrocarpon Aiton) and small cranberries (V. oxycoccus L. and V. vitis-idaea L.) in North America. While epidemiological research indicates cranberries have positive health benefits, identifying specific phytochemicals for disease prevention remains elusive. The central objective of this research was to develop phytochemical characterization tools for comparing commercially cultivated cranberries and two wild-harvested Vaccinium species. A method was developed and validated to quantify cyanidin-3-O-galactosi

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10

Singh, Sumitra. "Phytochemical and biological studies on Asian plants." Thesis, University of Strathclyde, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249201.

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11

Khan, M. R. "Phytochemical study of some Costa Rican plants." Thesis, University of Strathclyde, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381696.

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12

Katerere, David R. P. "Phytochemical and pharmocological investigations of African Combretaceae." Thesis, University of Strathclyde, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.249017.

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13

Rashid, Md Abdur. "Phytochemical and chemosystematic studies in Eriostemoninae (Rutaceae)." Thesis, University of Strathclyde, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296095.

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14

Guntupalli, Chakravarthi. "Phytochemical and biological investigations of rutaceous plants." Thesis, University of Sunderland, 2008. http://sure.sunderland.ac.uk/3685/.

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The Rutaceae family consists of 150 genera and 1,500 species, which are herbs, shrubs, and trees. The members of genus Glycosmis and Clausena are aromatic (contain volatile oils) and traditionally used for fever, swollen spleen, digestion, topical infections, skin itch, scabies, boils and ulcers. Accordingly from this family, Tetractomia roxburghiana, Glycosmis calcicola, and Clausena excavata were selected for systematic biological screening to exploit and identify compounds which may serve as subsequent leads for the treatment of skin diseases. While the initial aim of the programme had been

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15

Silva, Francisco JosÃ Souza da. "Phytochemical study of Croton Jacobinensis Baill (Euphorbiaceae)." Universidade Federal do CearÃ, 2010. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=6540.

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CoordenaÃÃo de AperfeiÃoamento de NÃvel Superior<br>Euphorbiaceae is a family of plants that have more than 8000 species with over 300 genera, widely distributed in tropical and temperate regions worldwide. Despite the wide distribution of this family, many species have never been studied in the chemical point of view. One of these species is Croton jacobinensis, restricted to Brazilian semi-arid region, known popularly as marmeleiro-branco. To contribute to the chemical knowledge of this species the woody of the roots of this plant was subjected to a cold extraction with a mixture of dichloro

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16

Jadalla, Baraa Mohamed Ibrahim Soliman. "Phytochemical and biological studies of Helichrysum cymosum." University of the Western Cape, 2020. http://hdl.handle.net/11394/8264.

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Masters of Science<br>Diabetes mellitus (DM) is well known as a group of systemic metabolic disorders with a considerable mortality rate around the world. Hyperglycemia is the main consequence of DM, which results from the shortage in insulin production or degradation of produced insulin. Other internal and external factors including obesity, oxidative stress, and sedentary lifestyle have been also suggested as the causes of DM. Among the well-known existing types of DM, type 1 and 2 are the most common. Treatment of type 1 necessitates insulin injection, while type II can be controlled by phy

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17

Kim, Youngmok. "Factors influencing antioxidant phytochemical stability of teas." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-3172.

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18

Wahyuono, Subagus. "PHYTOCHEMICAL INVESTIGATION OF AMSONIA GRANDIFLORA FAMILY APOCYNACEAE." Thesis, The University of Arizona, 1985. http://hdl.handle.net/10150/275413.

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19

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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20

Usman, Abdullahi. "Phytochemical investigation of Trichilia emetica (Natal mahogany)." Thesis, Bangor University, 2015. https://research.bangor.ac.uk/portal/en/theses/phytochemical-investigation-of-trichilia-emetica-natal-mahogany(7ec79b6e-96b9-4811-a7a6-407ad97bd8e1).html.

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Trichilia emetica seeds have already been utilised for oil extraction. This project investigated the chemistry of by-products, especially water after boiling the seeds and the defatted residue. The first part of the study was to subject the seed oils to physicochemical analysis using standard methods of food analysis. The data obtained were acid (0.4±0.0 and 0.4±0.1 mg KOH/g), iodine (69.2±2.1 and 64.6±2.8 gI2/100g), peroxide (10.3±0.5 and 9.2±0.4 %) and saponifiable value (195.4±5.4 and 197.3±4.6) for T. emetica seeds from Ghana and Mozambique and were comparable to those of other edible oils

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21

Freschi, Michela <1992&gt. "Neuroprotective role of nutraceutical and phytochemical components." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2022. http://amsdottorato.unibo.it/10233/1/PhD%20Thesis_Michela%20Freschi.pdf.

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Neurodegenerative diseases (NDs) are characterized by a multifactorial etiology, in which oxidative stress and inflammation are the main causative factors. For this reason, increasing attention is being paid to the characterization and the identification of nutraceuticals and phytochemicals with intrinsic pleiotropic activity. Moreover, in a Circular Economy perspective, these natural compounds can be obtained also from renewable resources derived from the food industry by-products and can be used for both preventive and therapeutic purposes. The aim of this PhD program was to identify nutra

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22

Omar, Semir. "Phytochemical discovery of antifeedant, antimicrobial and antimalarial principles." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/NQ66179.pdf.

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23

Habtemariam, Solomon. "Phytochemical and pharmacological investigation of some medicinal plants." Thesis, University of Strathclyde, 1992. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=21299.

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This thesis describes phytochemical and biological/pharmacological studies on six medicinal plants. Plant materials were extracted by ethanol, tested for their biological activity and then subjected to "bioassay-guided fractionation" to yield active and inactive compounds. The compounds were identified by standard physico-chemical techniques including UV, IR, NMR and ElMS. The crude ethanol extract of the leaves of Premna shcimperi was found to be antibacterial against gram positive bacteria (Staphylococcus aureus and Bacillus subtilis). An antibacterial bioassay-guided fractionation of the ex

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24

Shiu, Ka Po Winnie. "Phytochemical and Antibacterial Studies on the Genius Hypericum." Thesis, University College London (University of London), 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.499161.

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25

Stavri, Michael. "Phytochemical and antimicrobial studies on selected Kuwati flora." Thesis, University College London (University of London), 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.411791.

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26

Etse, J. T. "Phytochemical studies on some species of the Annonaceae." Thesis, University of Strathclyde, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381499.

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27

Sousa, LeÃncio Mesquita de. "Phytochemical study of Macroptilium lathyroides (L.) Urb. (FABACEAE)." Universidade Federal do CearÃ, 2011. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=6518.

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FundaÃÃo de Amparo Ã Pesquisa do Estado do CearÃ<br>Uma das prÃticas mais antigas no tratamento e na cura das enfermidades Ã sem dÃvida nenhuma, o uso dos produtos naturais, especialmente, os de origem vegetal. AtÃ o sÃculo XIX, os recursos terapÃuticos eram predominantemente constituÃdos pela utilizaÃÃo de partes das plantas e extratos vegetais. Com o avanÃo dos instrumentos cientÃficos e tecnolÃgicos se estabeleceu a tendÃncia de utilizaÃÃo das substÃncias ativas presentes nas plantas. Realizou-se a inve stigaÃÃo fitoquÃmica dos galhos e talos e das raÃzes de Macroptilium lathyroides. Est

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28

Otema, Anyanga Milton. "Phytochemical mediated resistance in sweetpotato to sweetpotato weevils." Thesis, University of Greenwich, 2015. http://gala.gre.ac.uk/18123/.

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This study evaluated sweetpotato resistance to sweet 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 root in a choice and no-choice bioassays confirming that New Kawogo, LIR302 and ARA228 affected development and emergence of adult weevils. Six hydroxycinnamic acid esters, including hexadecylcaffeic, hexadecylcoumaric, octadecylcaffeic, octadecylcou

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29

Winter, P. J. D. "Species delimitations in cannomois: anatomical and phytochemical evidence." Thesis, University of Cape Town, 2017. http://hdl.handle.net/11427/26453.

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30

Soriano, Imelda Rizalina. "Novel inducible phytochemical defences against plant parasitic nematodes /." Title page, table of contents and summary only, 2004. http://web4.library.adelaide.edu.au/theses/09PH/09phs7141.pdf.

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31

Wibberley, Mark Simon. "Growth and secondary metabolism in plant hairy root cultures." Thesis, University of the West of England, Bristol, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358245.

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32

Hoberg, Eva. "Phytochemical and analytical investigations of Vitex agnus-castus L /." [S.l.] : [s.n.], 1999. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=13285.

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33

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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34

Juan-Badaturuge, Malindra. "Antioxidant activity and phytochemical evaluations of selected medicinal plants." Thesis, University of Greenwich, 2010. http://gala.gre.ac.uk/8098/.

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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 angoroside A. Acteoside (yield = 1.21%, IC50 = 15.2 μM) appeared to be the most abundant and most antioxidant-active. The potent antioxidant activity is in support of the traditional use of the plant for wound healing and anti-inflammatory conditions. The methanolic extract of aerial parts of Tanacetum vulga

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35

Mills, Charles. "A phytochemical-microbiological survey of the South American Bromeliaceae." Thesis, University of Reading, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365874.

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36

Rungsimakan, Supattra. "Phytochemical and biological activity studies on Salvia viridis L." Thesis, University of Bath, 2011. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.557792.

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Six new compounds were isolated from the aerial and root parts of S. viridis L. cv. Blue Jeans. Two new triterpenoids, lup-20(29)-ene-2α-acetate-3β-ol, and lup-20(29)-ene-2α-ol-3β-acetate were found in the aerial part together with lup-20(29)-ene-2α-3β-diol, ursolic acid, oleanolic acid, β-sitosterol and β-sitosterol glucoside. Three new diterpenoids, 1-oxomicrostegiol, viroxocane, viridoquinone, together with five known diterpenoids, ferruginol, salvinolonyl 12-methyl ether, microstegiol, 7α-acetoxy-14-hydroxy-8,13-abietadiene-11,12-dione and 7α,14-dihydroxy-8,13-abietadiene-11,12-dione were

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37

Marques, Ricardo de AraÃjo. "Phytochemical and Biological Investigation of Humirianthera ampla Miers (Icacinaceae)." Universidade Federal do CearÃ, 2007. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=7212.

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CoordenaÃÃo de AperfeiÃoamento de Pessoal de NÃvel Superior<br>The phytochemical investigation of the roots of Humiranthera ampla (Icacinaceae) resulted in the isolation and identification of a mixture of beta-sitosterol and stigmasterol, annonalide, lupeol and the 3-beta-O-beta-D-glucopyranosyl sitosterol. The structures of these compounds were established by spectrometric analysis (IR, MS, NMR 1H and 13C) including bidimensional NRM techniques (COSY, HMQC, HMBC and NOESY) and for comparison with data described in the literature. All extracts were tested using the Ellman assay. Only ethyl ac

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38

Donegá, Mateus Augusto. "Agronomic and phytochemical aspects of cilantro and stevia crops." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/11/11136/tde-05022014-095330/.

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The market of medicinal plants and herbs such as cilantro (Coriandrum sativum) and stevia (Stevia rebaudiana) has been growing due to the demand of the food, chemical and pharmaceutical industries. Leaves of C. sativum are used by many countries in the preparation of food and in folk medicine. The essential oil from the leaves has potential for use in the food industry as an antimicrobial agent and as a condiment to mask undesirable odors and flavors. Studies were conducted to evaluate the activity of the essential oil of cilantro against Leishmaniasis, and the results showed that the essentia

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39

Chen, Dianne Tzu-Hsiu. "Phytochemical studies on traditional medicinal plants with antimalarial activities." Master's thesis, University of Cape Town, 1997. http://hdl.handle.net/11427/21853.

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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 isolated from the active fractions of these three plants. The types of compounds isolated included: three triterpenoids (20(29)-Lupene-3α,28- diol (30), 20(29)-Lupene-3α, 16β,28-triol (32) and 3β-Hydroxy-20(29)-Lupen-28-oic acid (42)); two diterpenoids (8-Abietene-7 β,13 β -diol (45) and cariocal (51

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40

Reynertson, Kurt Allerslev. "Phytochemical analysis of bioactive constituents from edible Myrtaceae fruits /." View online, 2007. http://home.earthlink.net/~myrtaceae/Reynertson_dissertation.pdf.

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Thesis (Ph. D.)--City University of New York, 2007.<br>Includes bibliographical references (leaves 100-120) and index. Also available for educational and research purposes in PDF format on the Internet.

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41

Shukla, Yatin Jagannath. "Phytochemical studies of botanicals : Hoodia Gordonii and Caralluma species /." Full text available from ProQuest UM Digital Dissertations, 2009. http://0-proquest.umi.com.umiss.lib.olemiss.edu/pqdweb?index=0&did=1799143131&SrchMode=1&sid=7&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1268341330&clientId=22256.

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Thesis (Ph.D.)--University of Mississippi, 2009.<br>Typescript. Vita. Major professor: Dr. Ikhlas A. Khan Includes bibliographical references (leaves 277-303). Also available online via ProQuest to authorized users.

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42

Goggans, Mallory. "Elucidating Tomato Steroidal Glycoalkaloid Metabolism and Effects of Consumption onthe Gut Microbiome in a Pig Model." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1594824484770731.

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43

Volken, Maria Carmen. "Biological and phytochemical investigations of Euphorbiaceae from Papua New Guinea /." [S.l.] : [s.n.], 1999. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=13294.

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44

Burt, Andrew J. "Phytochemical mediation of post-harvest insect resistance in tropical maize." Thesis, University of Ottawa (Canada), 2003. http://hdl.handle.net/10393/22632.

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45

Alqahtani, Alaa. "Phytochemical investigation of members of the Asparagaceae and Euphoriaceae families." Thesis, University of Surrey, 2015. http://epubs.surrey.ac.uk/808763/.

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The Asparagaceae family is richly represented in the southern African region and has approximately 900 species. It consists of four tribes, the Hyacintheae, Urgineeae, Ornithogaleae, and Oziroeeae. Members of the Asparagaceae are widely used in traditional remedies for the treatment of several ailments, such as infections, rheumatism, inflammation and disorders associated with the central nervous system. Different species belonged to Urgineeae tribe (Rhodocodon campanulatus, R. calcicola), Hyacintheae tribe (Chionodoxa luciliae (Gigantea Hort)), Ornithogaleae tribe (Ornithogalum pyramidale and

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46

Assinewe, Valerie Ann. "Phytochemical variation and immunopharmacology of Panax quinquefolius L. (American ginseng)." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2002. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ66118.pdf.

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47

Ramos-Jerz, María del Refugio. "Phytochemical analysis of avocado seeds (Persea americana Mill., c.v. Hass)." Göttingen Cuvillier, 2007. http://d-nb.info/98608638X/04.

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48

Gordien, Andrâea Y. "Phytochemical and antimicrobial studies of Scottish plants and fungal endophytes." Thesis, University of Strathclyde, 2010. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=14347.

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49

Sanchez-Medina, Alberto. "Phytochemical and pharmacological studies on some endemic Yucatecan medicinal plants." Thesis, University of Greenwich, 2007. http://gala.gre.ac.uk/6291/.

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Four endemic medicinal plants from the Yucatan peninsula belonging 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 Serjania adiantoides Radlk. The root, stem/bank and leaves of each plant species were extracted using ethanol and the resulting crude extracts were tested for their cytotoxic effect using the modified MTT (3-[4,5-Dimethylthiazol-2-yl]-2,5-di

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50

Osborne, S. J. "Phytochemical and anatomical investigations in the genera Acronychia and Maclurodendron." Thesis, University of Sunderland, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234871.

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