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Dissertations / Theses on the topic 'Chemical and botanical characteristic'

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Published: 24 April 2022

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1

Chen, Zewei. "Authentication of Complex Botanical Materials by Chemometrics and Chemical Profiling." Ohio University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1617010785195628.

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2

Zhao, Jianping. "Chemical profiling of botanical supplements : Maca (Lepidium Meyenii) and Damiana (Turnera Diffusa) /." Full text available from ProQuest UM Digital Dissertations, 2007. http://0-proquest.umi.com.umiss.lib.olemiss.edu/pqdweb?index=0&did=1414122821&SrchMode=1&sid=1&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1221157623&clientId=22256.

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3

Martinson, Wade S. "Index and characteristic analysis of partial differential equations." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/16734.

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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 2000.<br>Includes bibliographical references (leaves 230-238) and index.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Technologies for dynamic simulation of chemical process flowsheets, as implemented in equation-based dynamic simulators,allow solution of fairly sophisticated process models, that include detailed descriptions of physical phenomena along with operating policies and discrete events. Simul
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4

López, López Lino Constancio. "Botanical and chemical composition of diets selected by alpacas (Lama pacos) pastured in the Ulla Ulla wetlands." BYU ScholarsArchive, 2004. https://scholarsarchive.byu.edu/etd/5382.

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This study was done in the subtropical high Andes of Ulla Ulla. Its objectives were to determine the botanical composition, nutritional value, and preferred forages in the wetlands (hydromorphic and mesico) diet, by season (dry and wet), and by botanical family (12 families). Three-hundred sixty samples were collected from 6 alpacas with esophageal fistulations, and from them nutritional value and botanical composition were determined; the latter was compared with the botanical composition of the wetlands to determine preference. The results are highly significant (p<0.01) for botanical famili
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5

Ndolo, Victoria Uchizi. "Characterisation of chemical components in manually isolated aleurone and associated layers from maize, wheat and barley kernels." Elsevier, 2013. http://hdl.handle.net/1993/30914.

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Health benefits related to consumption of whole grains have been attributed in part to phytochemical and micronutrient composition. Understanding the composition, structure and distribution of these components in different cereal grains is of potential importance in aiding the selection of whole grains and their processed fractions for inclusion in the diet, and as ingredients in development of new food products. The aim of this research was to characterise the chemical components in the botanical fractions of yellow corn, barley, wheat. Manual separation, a tedious and laborious technique tha
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6

Achu, Nina Cristóbal. "Determination of the botanical and chemical composition of the pasture diet selected by llamas (Lama glama) during the rainy season in the community of Pujrata." BYU ScholarsArchive, 2003. https://scholarsarchive.byu.edu/etd/5324.

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Llamas (Lama glama) take advantage of poor natural forage (grasses and others) due to their efficient digestive physiology that is adapted for this type of forage. The problem now faced is the gradual exhaustion of the native grassland (low phytomass production). The vegetation does not cover the dry matter consumption requirements, and less so the nutrient requirements, of these animals. Because of this there is the necessity of determining the botanical composition, pasture selection by plant parts, and chemical composition of what llamas ingest in order to improve these animals' nutrition i
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7

Kokubo, Shinsuke. "Characterization of Physical and Chemical Properties of Synthetic Polymer using Ion Mobility-Mass Spectrometry." Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2017. http://hdl.handle.net/11858/00-1735-0000-0023-3FAC-5.

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8

Acharya, Lok P. "Chemical and Physical Characteristics of Mahoning River Sediment Before and After Fungal Bioremediation." Youngstown State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1211558693.

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9

Mohamed, Fathia A. B. "An Experimental Study on the Effects of Heat and Chemical Inhibitors on the Flow Behaviour of Waxy Crude Oils. The Effects of Heat and Chemical Inhibitors on the Rheological Properties of Waxy Crude Oils with regard to Pumping in Pipelines." Thesis, University of Bradford, 2019. http://hdl.handle.net/10454/18393.

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Waxy crude oils (1/3 of oil produced worldwide), pumping through pipelines considered risky operation due to the crude wax content (15-40 wt.%) and to the temperature at which wax supersaturates and precipitates, leading to the danger of pipe blockage, eventually resulting, in multimillion dollars loss in production and maintenance. This research undertaken to develop operational strategy of waxy crude pipelines, considering the crude and crude gel properties and flow conditions. The research problem was approached by characterizing the crude gel with and without additives usin
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10

Lino, João da Silva Fonseca Correia. "Composição fenólica e características cromáticas de madeiras de carvalho Limousin e de castanheiro (utilizadas em vasilhas e sob a forma de aduelas) destinadas ao envelhecimento de aguardente vínica." Master's thesis, Universidade de Évora, 2014. http://hdl.handle.net/10174/20926.

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A tecnologia tradicional de envelhecimento de aguardentes vínicas,em vasilha de madeira, envolve um custo elevado, devido ao longo período de contacto entre a madeirae a aguardente e à existência de uma perda significativa desta última por evaporação. A necessidade de reduzir o custo de investimento, justifica pois a procura de sistemas alternativos de envelhecimento.Como tal, o objetivo do presente trabalho consiste noestudo das características físico-químicas das madeiras de duas espécies botânicas (carvalho francês Limousin e o castanheiro), com queima média mais, utilizadas em simultâneo n
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11

ARCANJO, JUNIOR Hélio Gomes. "Avaliação quantitativa e qualitativa do resíduo de variedades de milho cultivados para a produção de minimilho." Universidade Federal Rural de Pernambuco, 2014. http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/6492.

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Submitted by Mario BC (mario@bc.ufrpe.br) on 2017-02-21T13:47:37Z No. of bitstreams: 1 Helio Gomes Arcanjo Junior.pdf: 943075 bytes, checksum: a2b879ed967c57e40067c04cd29fde6a (MD5)<br>Made available in DSpace on 2017-02-21T13:47:37Z (GMT). No. of bitstreams: 1 Helio Gomes Arcanjo Junior.pdf: 943075 bytes, checksum: a2b879ed967c57e40067c04cd29fde6a (MD5) Previous issue date: 2014-02-24<br>Corn [Zea mays (L.) Poaceae] is one of the most widely produced crops in the world, with high nutritional value and diverse applications, serving as a food source for both humans and animals. The production
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OLIVEIRA, Osniel Faria de. "Caracterização da vegetação, desempenho e seletividade de ovinos em caatinga raleada sob lotação contínua, Serra Talhada-PE." Universidade Federal Rural de Pernambuco, 2012. http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/6862.

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Submitted by (edna.saturno@ufrpe.br) on 2017-05-16T11:49:39Z No. of bitstreams: 1 Osniel Faria de Oliveira.pdf: 2473892 bytes, checksum: ce5ce70228459fb50391d77d95ca9fcb (MD5)<br>Made available in DSpace on 2017-05-16T11:49:39Z (GMT). No. of bitstreams: 1 Osniel Faria de Oliveira.pdf: 2473892 bytes, checksum: ce5ce70228459fb50391d77d95ca9fcb (MD5) Previous issue date: 2012-07-17<br>The Caatinga is an important forage resource for the herd of Brazilian semiarid region. This study aimed to characterize the vegetation and animal performance, as well as the sheep selectivity throughout the yea
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SANTOS, Gladston Rafael de Arruda. "Caracterização da vegetação e da dieta de ovinos em área de Caatinga no Sertão de Pernambuco." Universidade Federal Rural de Pernambuco, 2007. http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/6819.

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Submitted by (edna.saturno@ufrpe.br) on 2017-04-27T12:32:05Z No. of bitstreams: 1 Gladston Rafael de Arruda Santos.pdf: 1165221 bytes, checksum: 5786821db43d97fdfc5666afe0c0fc9b (MD5)<br>Made available in DSpace on 2017-04-27T12:32:05Z (GMT). No. of bitstreams: 1 Gladston Rafael de Arruda Santos.pdf: 1165221 bytes, checksum: 5786821db43d97fdfc5666afe0c0fc9b (MD5) Previous issue date: 2007-04-27<br>Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq<br>The work was conducted at the experimental station of Sertânia - IPA with the objective of characterizing the ve
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14

Gharbi, Amina. "Élaboration de biomatériaux à base de verres fluorés et borés : évaluations physico-chimique et mécanique." Thesis, Rennes 1, 2016. http://www.theses.fr/2016REN1S148.

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Ce travail de thèse porte sur le développement des nouveaux verres bioactifs de comblement osseux. Ils sont élaborés par fusion dans le système quaternaire : SiO2-CaO-Na2O-P2O5. Deux éléments chimiques (bore et fluor), ont été incorporés au sein du réseau vitreux. L’effet de la quantité des éléments ajoutés dans le verre, sur le comportement physico-chimique, mécanique et physiologique a été mené par plusieurs techniques originales. L’intégration du bore ou du fluor au sein de la matrice vitreuse, influe sur les caractéristiques thermiques des verres synthétisés. Les performances mécaniques en
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15

SILVA, Quésia Jemima da. "Caracterização de frutos de genótipos de cirigueleiras (Spondias purpurea L.)." Universidade Federal Rural de Pernambuco, 2011. http://www.tede2.ufrpe.br:8080/tede2/handle/tede2/5095.

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Submitted by (edna.saturno@ufrpe.br) on 2016-07-27T14:31:44Z No. of bitstreams: 1 Quesia Jemima da Silva.pdf: 573805 bytes, checksum: 984b32e6c34ddabedfcb3336ddf1535c (MD5)<br>Made available in DSpace on 2016-07-27T14:31:44Z (GMT). No. of bitstreams: 1 Quesia Jemima da Silva.pdf: 573805 bytes, checksum: 984b32e6c34ddabedfcb3336ddf1535c (MD5) Previous issue date: 2011-02-28<br>Faced with the need to develop studies with fruit native to Brazil, the aim of this research was to determine the physical and physic chemical characteristics of red mombin fruits from 11 genotypes cultivate in the Ac
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16

Le, Cras Frédéric. "Oxydes Li-Mn-O pour accumulateurs au lithium : synthèses nouvelles, aspects structuraux et électrochimiques." Phd thesis, Université Joseph Fourier (Grenoble), 1996. http://tel.archives-ouvertes.fr/tel-00530193.

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Ce mémoire décrit la synthèse, la caractérisation – notamment thermogravimétrique et structurale – et les propriétés d'intercalation électrochimique du lithium de plusieurs types d'oxydes de manganèse. On décrit tout d'abord la préparation d'une 'ramsdellite synthétique', à faible taux de défauts structuraux de type rutile. Les oxydes de manganèse lamellaires (phyllomanganates) ont donné lieu à une nouvelle voie de synthèse du phyllomanganate de lithium par une succession de réactions topotactiques (échanges d'ions) à basse température. Sa stabilité thermique et ses propriétés d'intercalation
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17

Kébré, Bawindsom. "Gestion des ressources en eau dans les régions arides : analyse expérimentale d’un sol type du Burkina Faso et modélisation numérique des transferts d’eau." Thesis, Montpellier 2, 2013. http://www.theses.fr/2013MON20214/document.

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L'étude présentée dans cette thèse porte sur une analyse expérimentale des propriétés physiques (densités, porosité, granulométrie) et hydrodynamiques (isotherme de désorption, courbe caractéristique sol-eau, perméabilité à saturation) d'un sol type aride du Burkina Faso et une simulation numérique des transferts d'eau. La modélisation des transferts est abordée par une approche thermodynamique qui constitue un cadre général pour décrire à la fois l'état de l'eau dans le sol et les mécanismes de transferts mis en jeu : filtration de la phase liquide, diffusion de la vapeur d'eau, changement de
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18

Sousa, Graziela Leal. "Composição e qualidade de méis de abelhas (Apis mellifera) e méis de abelha Jataí (Tetragonisca angustula)." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/9/9131/tde-06092017-121421/.

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O mel é um alimento de uso milenar, açucarado de fácil digestão, que constitui uma importante fonte de energia, contribuindo para o equilíbrio do processo biológico do corpo humano, sendo elaborado a partir da desidratação e transformação do néctar das flores nativas pelas abelhas produtoras. Para que o mel seja comercializado para o consumo humano, ele precisa atender aos requisitos mínimos de identidade e qualidade exigidos pela Legislação Brasileira. No Brasil a criação de abelhas é dividida em duas práticas distintas, a Apicultura tradicional, que utiliza as abelhas Apis mellifera e a Meli
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19

Pereira, Fernanda Fialho. "Avaliação das características do fango de Araxá-MG com finalidade de uso cosmético." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/9/9139/tde-20092017-164219/.

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O tratamento cosmético facial e corporal que emprega o Fango vem sendo muito utilizado em clínicas de estética, com o intuito de melhorar a aparência da pele. A literatura científica carece de informações sobre alguns aspectos desta matéria-prima, como: as condições adequadas para sua coleta, preservando suas características químicas e microbiológicas; as especificações de qualidade da matéria-prima (física, química, microbiológica e toxicológica); e as metodologias analíticas de avaliação. A qualificação do Fango é primordial para o mesmo ser utilizado como matéria-prima de uso cosmético \"ta
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20

Broussaud, Florence. "Influence de la teneur en magnesium sur la microstructure et les proprietes mecaniques d'alliages al-li-cu-mg." Paris 6, 1988. http://www.theses.fr/1988PA066110.

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Etude experimentale pour les alliages contenant 0 a 1% de magnesium. Analyse par microscopie electronique en transmission et par analyse enthalpique differentielle de l'evolution de la precipitation. Analyse de la correlation entre la precipitation et les proprietes mecaniques en utilisant des essais de durete et de traction. Seuls les alliages a faible teneur en magnesium s'averent interessants sur le plan d'une application. Influence de la structure (cristallisation et texture) sur les proprietes mecaniques et en particulier sur leur heterogeneite suivant la direction travers-long
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21

Géniès, Sylvie. "Étude de la passivation de l'électrode carbone-lithium." Grenoble INPG, 1998. http://www.theses.fr/1998INPG0008.

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Le phenomene de la passivation de l'electrode carbone-lithium utilisee comme pole negatif dans la batterie lithium-ion est d'une importance cruciale dans les caracteristiques du fonctionnement de cette electrode. Il en fixe la capacite reversible (ou utile), la duree de vie et le taux d'autodecharge. Ce travail est une contribution a la comprehension des processus chimiques et electrochimiques survenant a la surface de l'electrode au cours de l'echange du lithium avec une solution electrolytique a base d'un ou plusieurs solvant(s) organique(s) et d'un sel de lithium et conduisant a la formatio
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22

Montpied, Sylvie. "Contribution a l'etude de la passivation de composants sur arseniure de gallium : caracterisation de films dielectriques realises par depot en phase vapeur assiste par plasma." Clermont-Ferrand 2, 1986. http://www.theses.fr/1986CLF21020.

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Les transistors a effet champ a contact metal-semiconducteur, non passives, realises sur arseniure de gallium sont sujet a une degradation progressive de leurs performances statiques et dynamiques aux hyperfrequences. Ce defaut de fonctionnement est en parti attribue aux surfaces d'arseniure de gallium situees de part et d'autres de la grille. La stabilisation des composants requiert donc de la passivation de ces zones grace a des materiaux de haute qualite dielectrique realisant une interface stable avec gaas. Dans cette optique, les proprietes physico-chimiques et electriques de films de sil
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23

Picart, Sébastien. "Fonctionnalisation de la polyaniline par des composés soufrés électroactifs en vue de son utilisation en batteries au lithium." Université Joseph Fourier (Grenoble), 1995. http://www.theses.fr/1995GRE10236.

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Ce travail se situe dans le cadre de l'application des polymeres conducteurs electroniques (pce) aux batteries rechargeables. L'objectif a ete d'associer deux partenaires aux proprietes electrochimiques complementaires: un pce, la polyaniline, connue pour sa bonne tenue a la charge permanente, une autodecharge faible et une cyclabilite elevee en batterie, et un systeme electroactif base sur le couple redox disulfure/dithiolate qui presente une forte densite d'energie massique. Trois voies ont ete successivement explorees: - la preparation d'une polyaniline substituee sur le cycle par un groupe
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24

CHEN, YAN-ZHANG, and 陳彥璋. "The characteristic of acid precipitation at Botanical Garden, Taipei." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/72248431095954908954.

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25

Dridi, Asma. "Chemical composition and bioactivity of different botanical parts of Aesculus hippocastanum L. fruits." Master's thesis, 2018. http://hdl.handle.net/10198/19832.

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Dupla diplomação Université Libre de Tunis<br>Since ancient times, natural products, especially those originated from plants have been an important source of therapeutic agents. Currently, several drugs are derived from natural products (plants, animals, bacteria and fungi). Although the focus the synthetic chemistry advances, research on natural pharmaceutical uses has been knowing an important increase in number. In addition, recent data from the pharmaceutical industry show that, for some complex diseases, natural products still represent an extremely valuable source for prospecting new che
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26

Moodley, Nivan. "The chemical investigation of the Amaryllidaceae and Hyacinthaceae." Thesis, 2004. http://hdl.handle.net/10413/3910.

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This work is an account of investigations into the chemistry of members of the Amaryllidaceae and Hyacinthaceae families. The plants of the family Amaryllidaceae are a large group comprising over sixty genera and more than a thousand species. They are widely distributed, but are found more richly in the tropics, with a particularly high density in South Africa, with smaller centers of diversity in Andean South America and the Mediterranean. Amaryllidaceae plants have been extensively used by local traditional healers and have been reported to have numerous pharmacological uses. The alkaloids i
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Moodley, Nivan. "The chemical investigation of Ledebouria zebrina and Scilla natalensis." Thesis, 2001. http://hdl.handle.net/10413/8578.

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Ledebouria zebrina and Scilla natalensis Planch were the two species investigated in this work. Ledebouria zebrina belongs to the Hyacinthaceae (Liliacea sensu lato) and to this date, the chemical composition of this species has not been investigated. Members of this family are found in southern Africa. The Ledebouria genus was formerly classified as part of the Scilla genus from which a large member of naturally occuring oxygen heterocycles known as homoisoflavanones have been isolated. In this work the bulbs of L. zebrina were investigated and five compounds were isolated. Three compounds we
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28

Steyn, Trevor. "The chemical constituents of Ehretia rigida, Apodytes dimidiata and Ocotea kenyensis." Thesis, 1998. http://hdl.handle.net/10413/4400.

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Three species have been investigated in this project: Iso-ocobullenone (p 23) and its probable precursor (p 27) have been isolated from the leaves and bark of Ocotea kenyensis. This is only the second time that these compounds have been isolated and the first time from this species. The isolation of these two compounds in the leaves establishes a commercially important chemical link with the bark. The bark of the closely related Ocotea bullata is the most sought after source of "muthi" in the Kwa-Zulu Natal region and it is becoming a very scarce commodity. The leaves of Ocotea kenyensis have
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Chen, Chih-Ming, and 陳志明. "Analysis and Adjustment of Process Characteristic Curve for Chemical Mechanical Polishing." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/06235053627225737436.

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碩士<br>中原大學<br>機械工程研究所<br>100<br>As the semiconductor manufacturing strides forward into the ULSI (Ultra-large-scale integration) fabrication and the competitors increase with similar technology and facilities, the semiconductor industry has become a highly standardized industry. However, the prices of semiconductor products dramatically decline because of outstripped supply from mass production. Therefore, the manufacturers must reduce their production cost in order to gain a profit. Stringent process control is the hinge. In most semiconductor companies, the development and adjustment of proc
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Lin, Min-Ching, and 林敏景. "Investigation of Sulfate Dry Deposition Characteristic by Thim-film Chemical Reaction Method." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/22095139764304380907.

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碩士<br>朝陽科技大學<br>環境工程與管理系碩士班<br>90<br>Sulfate-contained particulate dry depositions by observing the deposited particulate at traffic intersection, coastal, and suburban areas were investigated. The deposited samples were coated with barium chloride (BaCl2) in the vacuum evaporator an then exposed to a relative humidity of 85% for 2 hours to form distinctive products for sulfate-contained particulates. The samples were observed by scanning electron microscopy. The major results are as follows : 1. Average volume shape factor (Sv) value of total particulate at traffic intersection was signific
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Lai, Yueh-Sheng, and 賴岳生. "Study on Chemical Synthesis and Characteristic Analysis of Nanosized Silver/Palladium Particles." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/59216787389644889252.

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碩士<br>國立清華大學<br>化學工程學系<br>91<br>The synthesis of both nanosized palladium-silver and silver colloids by chemical reduction using formaldehyde was investigated in this thesis. The effect of polyvinylpyrrolidone (PVP) on the precipitation mechanism was specifically studied. It was found that due to the strong interaction between Pd ions and PVP molecules, the Pd content in the co-precipitated products would be less than corresponding ones obtained in the absence of PVP molecules. This method could produce palladium-silver alloy colloids of 2~3 nm with a Pd rich core. Increasing PVP quantity woul
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Lee, Yi-Chi, and 李沂錡. "Physical and chemical characteristic studies in related with gas storage in Australian coals." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/85201379257757816287.

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碩士<br>國立中央大學<br>應用地質研究所<br>100<br>Global energy demand for the development and utilization of new alternative energy is increasing for a long time, in which CBM (Coal Bed Methane) is one of the popular research topics in recent years. The purpose of this study is to perform a series of physical and chemical characteristic studies of coal, so as to understand the relation between coal properties and gas adsorption storage. Permian coals from Bowen and Sydney Basin, Australia, were examined in this study. The results showed that vitrinite reflectance is ranged 0.54~1.03%, composed mostly of vitr
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Teng, Hsin-I., and 鄧心怡. "Effect of Different Drying Treatments on Characteristic and Chemical Properties of Acorn Flours." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/04907034315316455898.

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碩士<br>國立宜蘭大學<br>食品科學系碩士班<br>101<br>Acorns, the seeds of Fagaceae plants, are important forestry resources in Europe and Asia. In Taiwan, there were at least 50 edemic of Fagaceae in temperate and subtropical mountain forest Association. The acorns of Fagaceae are valuable food for wild life and human nutrition. In this study, the effect of drying conditions (dried at room temperature, dried at freeze, dried at 40℃, 60℃) on morphological and chemical properties of (Cyclobalanopsis glauca, CG; Lithocarpus lepidocarpus, LL; Castanea mollissima, CM) nuts flours were evaluated. Flours produced by m
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Lien, Wan-Chien, and 連婉茜. "Physical, Chemical and Biological Characteristic of Particles Emitted from Urban Wastewater Treatment Plant." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/478teh.

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碩士<br>國立中央大學<br>環境工程研究所<br>107<br>Urban wastewater treatment plants (UWTPs) could be an emission source of bioaerosols and particle matters into the air through the air-liquid exchange process and bubble-jet-droplet mechanism. It poses the potential of spreading human opportunistic pathogen and pharmaceutical emerging pollutants in wastewater into the air. In view of the potentials of emission and exposure risks of airborne particles in UWTPs, there is a need to comprehensively characterize the physical, biological and chemical characteristics of particles emitted from UWTPs. The main objectiv
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Chang, Shuo-Yu, and 張碩育. "Study on Flow Behavior and Molding Characteristic of Polycarbonate with Chemical Foaming Agents." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/jpd67m.

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碩士<br>國立交通大學<br>機械工程系所<br>106<br>Thin-shell injection-molded products have been widely used in consumer electronics market. Product design becomes more complex as this market grows. To enhance yield rate and product quality, manufacturers commonly use high-speed injection-molding machines. However, such machines may cause high residual stress and shear heating during the molding process, which deteriorates product quality. In addition, high-speed injection molding machines and their molds cost much more than the traditional injection-molding machines. In this study, we added a chemical foaming
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Steenkamp, P. A. "Chemical analysis of medicinal and poisonous plants of forensic importance in South Africa." Thesis, 2005. http://hdl.handle.net/10210/425.

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The Forensic Chemistry Laboratory of Johannesburg (FCL JHB) is tasked with the chemical analysis of a variety of samples to assist in determining the cause of death where unnatural cause is suspected. Some of the samples submitted to the laboratory have a herbal or muti connotation, but a large portion of these cases turn out to have no herbal components present as only pharmaceutical or agricultural products are detected in these samples. This study combined, for the first time, forensic investigation, chemistry and botany to create a unique platform needed for the identification of poisonous
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Sewram, Vikash. "A chemical investigation of a KwaZulu-Natal medicinal plant, Momordica foetida Schum. & Sond." Thesis, 1994. http://hdl.handle.net/10413/5075.

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Momordica foetida Schum. & Sond. (Cucurbitaceae), locally known as iNtshungu, is widely used by the Zulu people of Natal-KwaZulu for the treatment of a variety of ailments. The dried leaves leaves and stems of this plant was subjected to soxhlet extraction by refluxing with hexane, chloroform and methanol successively. Thin layer chromatography of the chloroform extract of the leaves revealed a multiplicity of compounds. The chloroform extract was further partitioned with sodium hydroxide resulting in an organic and aqueous phase. The organic phase, containing extract A, afforded two compounds
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"The chemical investigation of Ledebouria ovatifolia, Clivia caulescens and Haemanthus pauculifolius." Thesis, 1999. http://hdl.handle.net/10413/4105.

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Ledebouria ovatifolia (Bak.) lessop, Clivia caulescens R.A.Dyer and Haemanthus pauculifolius Snijman & Van Wyk were the three species investigated in this work. Ledebouria ovatifolia belongs to the family Hyacinthaceae (Liliaceae sensu lato) and, to date, the chemical composition of this species has not been investigated. Members of this family are widely distributed, but are particularly well represented in Southern Africa. The Ledebouria genus was formerly classified as part of the Scilla genus from which a large number of naturally occurring oxygen heterocycles known as homoisoflavonoids ha
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Brookes, Kathleen Bridget. "Chemical investigation of isihlambezo or traditional pregnancy-related medicines." Thesis, 2004. http://hdl.handle.net/10413/6093.

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This study was undertaken to redress the scant knowledge regarding the chemistry and mode of action of pregnancy-related traditional medicines, or isihlambezo (Zulu), which are used by 60 to 80% of women in South Africa. The three selected plants are among the six most frequently cited species from the approximately 90 used by traditional healers. The purpose of the study was to identify components which could cause uterine contractions, those with nutritional value for the foetus and mother, and those with any toxic effects. Plant root extracts were purified via silica gel column chromatograp
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Chiu, Jui-lin, and 邱瑞麟. "Effects of Chemical Structure and Surface Properties of Polyimide Films on the Alignment Characteristic of Liquid Crystal." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/96244302612100393777.

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碩士<br>逢甲大學<br>化學工程學所<br>98<br>Polyimides (PIs) with different inclination angle of polymer backbones, together with polar hydroxyl group and/or nonpolar trifluoromethyl group at various sites of the backbone were synthesized and used as liquid crystal alignment layers. The molecular conformation, surface chemistry, surface energy, surface morphology, and pretilt angle of the PI film were investigated. Effects of the conformation of the PI molecular backbone and the surface morphology of the rubbed PI layer,together with the intermolecular interaction between the LC molecular and the PI film on
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Luo, Jief-Yif, and 羅巨宜. "Study on the Field Emission Characteristic of Boron Doped Diamond Films Prepared by Mocrowave Plasma Enhance Chemical Vapor Deposition." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/03425797358094901620.

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Xie, Ming-Hsun, and 謝明勳. "The characteristic analysis on the buffer layer of CIS thin film solar cell by Chemical Bath Deposition and Sputtering Deposition methods." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/12277085548195744246.

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碩士<br>崑山科技大學<br>光電工程研究所<br>98<br>In this thesis, the CdS buffer layer of CuInSe2 (CIS) thin film solar cell is fabricated by Chemial Bath Deposition （CBD）and Sputtering Deposition (SD) methods, respectively. And there are two kinds of CBD methods, they are Co-melting CBD method and Separate-melting CBD method, respectively. The Co-melting CBD solution is completed with ammonium sulfate, cadmium sulfate, thiourea and ammonia melting together into 400 ml deionized water. For the Separate-melting CBD solution, firstly ammonium sulfate and mole cadmium sulfate melting separately into 50 ml deion
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Chen, Ming Huan, and 陳明鉉. "The study of the characteristic of the ultrathin gate oxynitride grown by means of the chemical oxide and the nitridation of LPCVD." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/49803455609203587669.

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碩士<br>國立交通大學<br>電子工程系<br>89<br>Abstract It is an inevitable trend for the gate dielectric to fabricate the ultrathin oxide in the future ULSI applications. However, it is difficult to fabricate the ultrathin gate oxide about 2nm in a stable and good environment. In spite of success of it, the boron atoms will penetrate into the thin oxide easily and lead to the reliability problem because the thickness of the oxide is too thin and boron is one kind of active atoms. In order to overcome its reliability problem, we use a new method to fabricate a better gate oxide. First, we grow a ch
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Lin, Kuan-Ju, and 林寬鋸. "Electron density distributions of some characteristic chemical bonds--H-Bonds, hypervalent sulfur bonds, chromium carbene bond and Rh-Rh Metal-Metal bond." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/19501586734036953443.

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Zhang, Guanghong. "Evaluation of the in vitro anticancer potential of Hypericum foliosum extracts." Master's thesis, 2017. http://hdl.handle.net/10451/34307.

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Tese de mestrado, Ciências Biofarmacêuticas, Universidade de Lisboa, Faculdade de Farmácia, 2017<br>Espécies do género Hypericum L. (Hypericaceae Juss.) têm sido utilizadas em todo o mundo como medicamentos tradicionais contra um grande número de patologias. Existem cerca de 500 espécies deste género botânico. Vários estudos de atividade antitumoral envolvendo diferentes espécies foram já realizados e mostraram a atividade antitumoral in vitro de diferentes espécies deste género botânico Hypericum, tais como Hypericum perforatum e Hypericum androsaemum. Este facto, associado à inexistência de
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Ravi, K. "CHM (Chemo-Hydro-Mechanical) Behavior of Barmer-1 Bentonite in the Context of Deep Geological Repositories for Safe Disposal of Nuclear Waste." Thesis, 2013. http://hdl.handle.net/2005/3294.

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Deep geological repository (DGR) for disposal of high-level radioactive waste (HLW) is designed to rely on successive superimposed barrier systems to isolate the waste from the biosphere. This multiple barrier system comprises the natural geological barrier provided by the repository host rock and its surrounding and an engineered barrier system (EBS). The EBS represents the synthetic, engineered materials placed within the natural barrier, comprising array of components such as waste form, waste canisters, buffer materials, backfill and seals. The buffer will enclose the waste canisters from
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田代, 亨. "米の品質とその特性解析に関する研究". 1993. http://hdl.handle.net/2237/12988.

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Iwanowski, Ireneusz. "Critical Behavior and Crossover Effects in the Properties of Binary and Ternary Mixtures and Verification of the Dynamic Scaling Conception." Doctoral thesis, 2007. http://hdl.handle.net/11858/00-1735-0000-000D-F132-2.

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