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Dissertations / Theses on the topic 'Properties adsorbent'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

CHENET, TATIANA. "PROPERTIES OF ADSORBENT MATERIALS AND THEIR APPLICATIONS IN ENVIRONMENTAL AND SUSTAINABLE CHEMISTRY." Doctoral thesis, Università degli studi di Ferrara, 2020. http://hdl.handle.net/11392/2487914.

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The separation of the components of large quantities of chemical mixtures into pure forms is at the basis of most industrial processes. These processes often involve the application of energy consumption technologies. The development of economic, effective, safe and rapid separation techniques in many industrial sectors at a large scale is still a challenging issue. Among the different separation techniques, adsorption, a consolidated technology, is still considered to be a reliable and robust method to purify fluids at low cost and with high efficiency. One of the main advantages of adsorptio

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2

Savill-Jowitt, Claire. "Catalytic and adsorbent properties of solid acid catalysts studied by ammonia adsorption microcalorimetry." Thesis, University of Huddersfield, 2007. http://eprints.hud.ac.uk/id/eprint/420/.

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Solid acid catalysts are becoming of great importance within the chemical industry and their acidity is of great interest, as this determines their application, plus many of their catalytic properties can also be directly related with their acidity. There has been a drive towards heterogeneous solid acid catalysts because of the environmental concerns with safe handling and disposal of mineral acid homogeneous catalysts such as H2SO4, and their separation from the product. Objectives of this work have been to study a range of solid acid catalysts and establish a relationship between catalyst s

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Newton, Nichola. "Preparation and properties of granular ferric hydroxide as an adsorbent in potable water treatment." Thesis, Loughborough University, 2002. https://dspace.lboro.ac.uk/2134/7866.

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Three iron oxide materials have been studied for uptake of three anions (arsenate, phosphate and fluoride) and a cation (cadmium) from aqueous solutions. Two of the materials were produced using original procedures developed at Loughborough University. The former material was conditioned by a controlled freeze-thaw procedure to enhance granularity and the latter was air-dried at room temperature. Their capacities were compared with a commercially available material supplied by GEH Wasserchemle, Germany. Pore size distributions and specific surface area values were determined by N2 analysis at

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4

Ellis, Michael Wayne. "An evaluation of the effect of adsorbent properties on the performance of a solid sorption heat pump." Diss., Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/17835.

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5

ABDALLAH, KHODR. "Contribution experimentale a l'etude de la cinetique d'adsorption de gaz." Paris, ENSAM, 1989. http://www.theses.fr/1989ENAM0003.

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Une nouvelle technique experimentale a ete mise au point pour etudier la cinetique d'adsorption due aux transferts de masse et de chaleur. Application a l'adsorption du methanol sur la zeolite x et le charbon actif

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6

Didas, Stephanie Ann. "Structural properties of aminosilica materials for CO₂ capture." Diss., Georgia Institute of Technology, 2014. http://hdl.handle.net/1853/54020.

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Increased levels of carbon dioxide in the atmosphere are now widely attributed as a leading cause for global climate change. As such, research efforts into the capture and sequestration of CO2 from large point sources (flue gas capture) as well as the ambient atmosphere (air capture) are gaining increased popularity and importance. Supported amine materials have emerged as a promising class of materials for these applications. However, more fundamental research is needed before these materials can be used in a practically relevant process. The following areas are considered critical research n

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7

BOURDIN, JEAN-PIERRE. "Contribution a l'etude de la structure electronique et des proprietes d'adsorption des surfaces des metaux de transition." Nantes, 1987. http://www.theses.fr/1987NANT2024.

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Etude dans l'approximation des liaisons fortes et de la methode des moments de la structure electronique et des proprietes d'adsorption de plusieurs types de surfaces de metaux de transition. Application a l'etude de la reconstruction de la surface (110) du tungstene. Interpretation du comportement surprenant des dimeres de la troisieme serie des metaux de transition sur la surface w (110) en prenant en compte les effets des correlations electroniques. Influence de la presence de marches sur les proprietes d'adsorption d'une surface d'un metal de transition

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8

An, Shuwang. "Neutron scattering from adsorbed species." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297936.

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9

Prasertmanukitch, Sitas. "Dispersed phase adsorbents : a study of their properties and behaviour." Thesis, University of Bristol, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.247501.

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10

Enarsson, Lars-Erik. "Dynamic and Equilibrium Properties of Adsorbed Polyelectrolyte Layers /." Stockholm Stockholm : Fiber- och polymerteknologi Fibre and Polymer Technology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4697.

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11

Dey, Fiona. "Study of the thickness of adsorbed water layers by atomic force microscopy." Thesis, University of Surrey, 1998. http://epubs.surrey.ac.uk/844499/.

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The effect of ambient humidity and adsorbed water can be of critical importance in the processing of fine powders in air. Adsorbed water layers can influence the adhesive properties of the powder and may lead to difficulties in processing and handling. It has been shown, in the current work, that in ambient conditions the interaction between two solid surfaces is dominated by the force arising from the presence of adsorbed water layers. In the current work an atomic force microscopy technique has been developed to determine the separation distance at which two solid surfaces, i.e. the AFM cant

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12

Bossé, Francis. "Surface properties of some diblock copolymers adsorbed onto solid substrates." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=41354.

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Surface and interaction characteristics of poly(styrene-b-4vinylpyridine) (S-4VP) and poly(styrene-b-methacrylic acid) (S-MAA) diblock copolymers were investigated by the method of inverse gas chromatography (IGC). Not surprisingly, the MAA segments were found to be acidic, while the polystyrene (PS) and the 4VP blocks were found to be basic, the 4VP moiety being the stronger base. For the S-4VP diblocks, when adsorbed onto particulates with acidic surfaces, the 4VP block is preferentially oriented to the substrate, leaving an air interphase which is enriched in PS. For the S-MAA diblock, at h

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13

Pettersson, Torbjörn. "Lubrication and Surface Properties of Adsorbed Layers of Polyelectrolytes and Proteins." Doctoral thesis, KTH, Ytkemi, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4663.

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Friction forces between protein / polyelectrolyte layers, adsorption properties of proteins, and conformational changes due to variation in electrolyte concentration have been investigated. The aim was to obtain better understanding of adsorbed layer properties, with focus on the relation between layer structure and lubrication capabilities. The major techniques used were AFM (atomic force microscope) with colloidal probe for normal force and friction measurements together with QCM-D (quartz crystal microbalance with dissipation) for measurement of adsorption and conformational changes of adso

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14

Pettersson, Torbjörn. "Lubrication and surface properties of adsorbed layers of polyelectrolytes and proteins /." Stockholm : Kemi, Chemistry, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4663.

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15

Lowe, Martin Jason. "Chemical and electronic properties of sulphur adsorbed on III-V semiconductor surfaces." Thesis, University of Warwick, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.397589.

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16

Chgoura, Mohammed. "Adsorption par des charbons actifs de molécules organiques à partir de solutions aqueuses." Aix-Marseille 1, 1987. http://www.theses.fr/1987AIX11082.

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17

BENAISSA, MOHAMMED. "Etude par spectroscopie infrarouge des proprietes superficielles de l'alumine et des alumines sodees ou fluorees : acidite et basicite." Caen, 1985. http://www.theses.fr/1985CAEN2013.

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Etude des groupes superficiels de l'alumine et des cites d'adsorption. Etude de l'adsorption des alcools sur l'alumine degussa c, des sites d'adsorption et de l'acidite induite. Donnees, enfin, sur les alumines modifiees par des ions na+ ou f-

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18

Torun, Engin. "Electronic Properties Of Dye Molecules Adsorbed On Anatase-titania Surface For Solar Cell Applications." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12610846/index.pdf.

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Wide band gap metal oxides have recently become one of the most investigated materials in surface science. Among these metal oxides especially TiO2 attracts great interest, because of its wide range applications, low cost, biocompatibility and ease of analysis by all experimental techniques. The usage of TiO2 as a component in solar cell technology is one of the most investigated applications of TiO2 . The wide band gap of TiO2 renders it inecient for isolated use in solar cells. TiO2 surface are therefore coated with a dye in order to increase eciency. This type of solar cells are called dye

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19

Tidwell, Caren Diana. "Endothelial cell interactions with model surfaces : effect of surface chemistry, surface mobility, and the adsorbed protein layer /." Thesis, Connect to this title online; UW restricted, 1999. http://hdl.handle.net/1773/8004.

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20

Verastegui, Wudmir Yudy Rojas. "Electronic and transport properties of graphene nanoribbons with adsorbed transition metal impurities : spin-orbit interaction." reponame:Repositório Institucional da UFABC, 2013.

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21

Dube, Cyril Simbarashe. "Sorptive and microbial properties of low-cost adsorbents used in the extraction of ciprofloxacin and isoniazid from aqueous solution." Thesis, Rhodes University, 2018. http://hdl.handle.net/10962/59178.

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22

Segall, Kevin Ian. "The relationship between dairy emulsion properties and the adsorbed milk protein layer, applications in ice cream." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0009/NQ58312.pdf.

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23

Gimåker, Magnus. "Influence of adsorbed polyelectrolytes and adsorption conditions on creep properties of paper sheets made from unbleached kraft pulp." Licentiate thesis, KTH, Fibre and Polymer Technology, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4553.

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<p>Papper uppvisar betydande tidsberoende mekaniska egenskaper som krypning och spänningsrelaxation. Det är känt att krypningen hos pappret påverkar till exempel en wellpapplådas förmåga att bära last under lång tid. En möjlighet att tillverka papper som kryper långsammare är därför önskvärd. Polyelektrolyter används ofta för att öka styrkan hos papper, och skulle kanske också kunna användas till att minska papprets krypning. Inverkan av polymera additiv på pappers krypegenskaper är emellertid knapphändigt beskrivet i litteraturen. Existerande studier har visat att polymera additiv inte påverk

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Gimåker, Magnus. "Influence of adsorbed polyelectrolytes and adsorption conditions on creep properties of paper sheets made from unbleached kraft pulp /." Stockholm : Fiber- och polymerteknologi, Kungliga Tekniska högskolan, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4553.

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25

Li, Rui. "Theoretical investigation of electronic properties of atomic clusters in their free forms and adsorbed on functionalized graphene support." Thesis, Pau, 2016. http://www.theses.fr/2016PAUU3018/document.

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Les (sub)nanoclusters sont des agrégats d’atomes ou de molécules composés de quelques unités à quelques centaines d’unités. En raison de leur petite taille, ils peuvent avoir des propriétés électroniques, optiques, magnétiques et catalytiques très différentes par rapport au solide correspondant . D'un point de vue expérimental, il est encore très difficile de synthétiser des agrégats de taille calibrée. D'un point de vue théorique, le développement des puissances de calcul, des méthodes de calcul de structure électronique et des algorithmes de recherches globales de structures stables, permett

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26

Råvik, Mattias. "Infuence of Escherichia coli feedstock properties on the performance of primary protein purification." Licentiate thesis, KTH, School of Biotechnology (BIO), 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3941.

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<p>Abstract</p><p>The aim of the present study was to increase the understanding of how the cell surface properties affect the performance of unit operations used in primary protein purification. In particular, the purpose was to develop, set up and apply methods for studies of cell surface properties and cell interactions.</p><p>A method for microbial cell surface fingerprinting using surface plasmon resonance (SPR) is suggested. Four different <em>Escherichia coli </em>strains were used as model cells. Cell surface fingerprints were generated by registration of the interaction between the ce

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27

Råvik, Mattias. "Influence of Escherichia coli feedstock properties on the performance of primary protein purification." Licentiate thesis, KTH, Bioprocessteknik, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3941.

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Abstract The aim of the present study was to increase the understanding of how the cell surface properties affect the performance of unit operations used in primary protein purification. In particular, the purpose was to develop, set up and apply methods for studies of cell surface properties and cell interactions. A method for microbial cell surface fingerprinting using surface plasmon resonance (SPR) is suggested. Four different Escherichia coli strains were used as model cells. Cell surface fingerprints were generated by registration of the interaction between the cells and four different s

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28

Gonzalez, Ortega Omar. "STUDY AND CHARACTERIZATION OF DUAL-FUNCTION AFFINITY CHROMATOGRAPHIC ADSORBENTS HAVING SIZE EXCLUSION AND ADSORPTION PROPERTIES TO ISOLATE, PURIFY AND RECOVER SMALL BIOMOLECULES FROM COMPLEX BIOLOGICAL MIXTURES." Diss., The University of Arizona, 2010. http://hdl.handle.net/10150/195896.

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In this work, the main emphasis of the research concerns the development of isolation and purification methods of biomolecules from biological fluids. Several separation techniques were incorporated in chromatographic gels to obtain multifunctional hybrid chromatographic separation media for proteins, peptides and amino acid isolation and purification.In the first part of the research, several chelating agents were synthesized and their effectiveness to purify immunoglobulins using Immobilized Metal Affinity Chromatography (IMAC) was investigated. Ethylenediamine triacetic acid (TED) with immo

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29

Garcia, Claudio J. "Investigation of single molecule and monolayer properties with Monte Carlo simulations of a coarse-grained model for alpha-sexithiophene." University of Akron / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron1511314081783002.

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30

Zhou, Jian Sheng. "Correlation entre tension interfaciale et composition de la couche adsorbee de systemes diphasiques capable de donner des microemulsions : influence de l'alcool comme cotensioactif." Paris 6, 1987. http://www.theses.fr/1987PA066674.

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La composition de la couche adsorbee a l'interface de systemes diphasiques : eau+nacl; dodecane, dodecylsulfate de sodium ou dodecylbenzenesulfonate comme agent de surface et butanol, pentanol ou alcool benzylique comme coagent de surface, est determinee par application de la loi de gibbs

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31

Franco, Cañellas Antoni Verfasser], та Frank [Akademischer Betreuer] [Schreiber. "Impact of partial nitrogen and fluorine substitution on the interface properties of π-conjugated molecules adsorbed on inorganic substrates. A combined photoelectron-spectroscopy and X-ray-standing-waves study / Antoni Franco Cañellas ; Betreuer: Frank Schreiber". Tübingen : Universitätsbibliothek Tübingen, 2020. http://d-nb.info/1209540436/34.

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Chang, Kuei-Sen, and 張癸森. "Improvement of Surface Properties of the Adsorbent by Using Low Temperature Plasma." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/76580716718970676507.

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碩士<br>中原大學<br>化學工程研究所<br>89<br>Abstract In this study the porous silica gels were prepared by the sol-gel process. The surface properties of silica gels modified by plasma technology were investigated. The objective of this study was to increase the adsorbent uptake in the adsorption dehumidification processes. The plasma technology is widely used in increase the hydrophilic of polymer films, but it is rare in the literature to deal with silica gel particles. Therefore, this technology was used to modified the surface properties and hydrophilic of silica gels in this study. Plasma treatment is

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33

Mezzari, Isabella Anna. "Predicting the adsorption capacity of activated carbon for organic contaminants from fundamental adsorbent and adsorbate properties." 2006. http://www.lib.ncsu.edu/theses/available/etd-01062006-171809/unrestricted/etd.pdf.

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34

Chung, Chin-Chung, and 鍾錦軍. "Adsorbent Surface properties modification by Using Flux Irradiation and Modelling of Dynamic Adsorption in a Fixed-Bed Column." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/28105142230274149182.

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碩士<br>中原大學<br>化學工程學系<br>87<br>Abstract The objective of this study was to increase the adsorbent uptake in a solid-desiccant-dehumidification system by using the neutron flux irradiation technology. The commercial activated carbons and silica gels were doped with boron-10 to produce the alpha particles during fast neutron irradiation. The alpha particles bumped the crystals to enhance microscopic damage and/or to increase microporous zones within the solid. Also, the hidden micropores could be broken and connected with the other micropores, which are opened to the surface of the ads

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35

賴世崇. "A study of Steam as the Activator Gas which is used in a Continuous Production Process of Carbon fabric adsorbent and its properties analysis." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/58830978890383340341.

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碩士<br>國立臺灣科技大學<br>纖維及高分子工程技術研究所<br>85<br>This research is about the possibility of water turning to steam which is used in a continuous production process of Activated Carbon Fabric. This production process use the regenerated cellulose fiber fabric as the raw material, such as ModalTM, Polynosic and Regular Rayon, and it is has been prepared by pretreatment of refractory reagent [Ammonium Sulfate˙(NH4)2SO4] and [Ammonium Phosphate Dibasic˙(NH4)2HPO4] (mixture ratio: 95/5, concentration:40wt.%). This process is used water into high temperature activation equipment become to steam as the acti

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36

Lee, Chun-Yin, and 李俊穎. "Phenolic-based activated carbon fiber adsorbents and their basic physical properties." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/24259489666086158822.

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碩士<br>國立臺灣科技大學<br>高分子工程系<br>91<br>This study is discussing the use of different processing conditions for procreating Phenolic-based activated carbon fiber adsorbents and their basic physical properties. The materials we used in the experiment were Phenolic-made by the Kynol Company. The process of oxidation, carbonization and activation engineering was completed within a self-designed, continuous, semi-open high temperature machine. The production conditions had to be changed according to the production rate （15 cm/min,25 cm/min, and 35 cm/min）and the quantity amount activated （20

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Huang, Guan-Wei, and 黃冠崴. "Synthesis and Properties of Novel Dendritic Co-Adsorbents for Dye-Sensitized Solar Cells." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/n4kgqq.

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碩士<br>國立高雄科技大學<br>化學工程與材料工程系<br>107<br>A bifunctional structure, 4-isocyanato-4’(3,3-dimethyl-2,4-dioxo-azetidino)diphenylmethane (IDD) was used as a building block. Then, this building block was reacted with 1-decanol and diethylenetriamine (DETA) to obtain a series of convergent C10 alkyl chain containing polyurea/malonamide dendron (G0.5-G2.5) through addition and ring opening reaction. Afterward, G0.5, G1.5 and G2.5 consisting of azetidine-2,4-dione functional group were selected and reacted with 6-aminohexanoic to generate the corresponding acid anchor containing dendritic co-absorbents (

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Kang, Zhewen. "Mechanical Properties of Hexadecane-Water Interfaces with Adsorbed Hydrophobic Bacteria." Phd thesis, 2009. http://hdl.handle.net/10048/524.

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Certain strains of hydrophobic bacteria are known to play critical roles in petroleum-related applications. The aim of this study was to investigate how hydrophobic bacteria in their stationary phase could adsorb onto the hexadecane-water interface and alter its mechanical properties. The two strains of bacteria used in forming the interfacial films were Acinetobacter venetianus RAG-1 (a Gram-negative bacterium) and Rhodococcus erythropolis 20S-E1-c (Gram-positive). Experiments at two different length scales (millimetre and micrometre) were conducted and the results were compared. In addit

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Marino, Antonio Raimondo, Gennaro Chiarello, Vincenzo Carbone, and Roberto Bartolino. "Electronic and vibrational properties of ultrathin layers adsorbed on metal surfaces." Thesis, 2011. http://hdl.handle.net/10955/1056.

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Pereira, Ana Jorge Meireles. "Shaping, characterization, and measurement of adsorption properties of ZIF-8 and MIL-53(Al) adsorbents." Master's thesis, 2019. https://hdl.handle.net/10216/121954.

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Chao-ChengWang and 王照程. "Stability and electronic properties of alkali- and halogen-atom-adsorbed silicene nanoribbons." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/11847892460279900280.

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碩士<br>國立成功大學<br>物理學系<br>104<br>Despite the popularity of grapheme research in recent years, silicon is still the main material used in current semiconductor industries. From a more industrial point of view, the research on silicon based nanostructure paves a more practical development path for doth compatibility and economic reasons. The electronic structures of ASiNRs adsorbed with alkali metals and halogen elements are studied using the density functional theory based on screened exchange local density approximation method. The most preferable adsorption sites are found to be hollow and top

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Jheng, Jhe-lun, and 鄭哲倫. "The influence of adsorbed molecules on graphene sheets on carrier transport properties." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/jt3k65.

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碩士<br>國立中山大學<br>物理學系研究所<br>103<br>We use graphene sheets to detect the ethanol. Due to the ethanol molecules adsorbed on graphene sheets, these molecules induce local potential wells on graphene sheets. That will affect on the carrier transport properties. The resistance change is proportional to the ethanol concentration. The dynamic response of evaporation is traced. It shows that the resistance decays because of the ethanol molecules desorption. We use Polanyi-Wigner equation fitting, and we obtain the desorption rate. The higher ethanol concentrations make the slower desorption rate. To cl

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Zheng-WeiLiu and 劉政緯. "First-Principles Calculations on Feature-Rich Electronic Properties of Aluminum-Adsorbed Silicene." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/4ct9ep.

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碩士<br>國立成功大學<br>物理學系<br>104<br>Graphene, silicene, and group IV graphene-related systems have already been very popular subjects for quite some time. Especially, it has unique structural, electronic properties and chemical properties. In this thesis, we use the first principle calculations to study the properties and simulate the electron density distribution of crystal by VASP. The study focuses on aluminum-adsorbed silicene, considering the case of extreme symmetric. Geometric structures, electronic Structures, charge distributions, and density of states (DOS) strongly depend on the differen

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HUANG, YU-HAO, and 黃禹皓. "Enhanced field emission properties of zinc oxide nanorods adsorbed with gold nanoparticles." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/z675mg.

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Ho, Chin-Yin, and 賀志殷. "Study on Adsorption Properties and Breakthrough Model of 1,1-Dichloro-1-Fluorothane on Various Micropore Adsorbents." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/94448381744805296044.

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碩士<br>國立臺灣大學<br>環境工程學研究所<br>85<br>The adsorptions of 1,1-dichloro-1-fluoroethane (HCFC-141b) on three different adsorbents, i.e., granular activated carbon, activated carbon fiber and hydrophobic zeolite, respectively, were performed. Some major physicaland chemical properties of the adsorbents used in this study, and adsorption capacities and breakthrough curves for the adsorption of HCFC-141b at various temperatures and concentrations were determined. The expermental results werecorrelate

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SCARDAMAGLIA, MATTIA. "Growth Morphology, Electronic Properties and Interaction of Organo-Metallic Molecules Adsorbed on Graphene." Doctoral thesis, 2012. http://hdl.handle.net/11573/917730.

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Since the isolation of a single graphene flake in 2004, the extraordinary electronic, optical and mechanical properties of this one-atom-thick material emerged, attracting a continuous rising interest both from fundamental and technological perspectives. Within this research field, a key challenge is to move from model structures to more complex configurations: being graphene a surface without bulk, its properties are very sensitive to local perturbations, but the countless possibilities of modifying graphene properties by suitable functionalization procedures with atoms or molecules are stil

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Lien, Chun-Te, and 連峻德. "A Study on Adsorption and Desorption Properties of Catechins and Caffeine on Silica Adsorbents Containing Beta-cyclodextrin." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/81604063558676256077.

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碩士<br>國立雲林科技大學<br>化學工程與材料工程系碩士班<br>101<br>Green tea is recognized for its high content of tea polyphenols, in particular tea catechins. The four represented catechins in green tea are, epicatechin (EC), epigallocatechin gallate (EGCG), and epicatechin gallate (ECG). Among these four major compounds, EGCG is the most abundant and biologically active compound in green tea. In this study, the optimal techniques for preparation of silica adsorbents containing β-cyclodextrin (β-CD) and their use in column chromatography were investigated. The objective is using the self-prepared silica adsorbents c

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PENG, CHAO-CHUN, and 彭兆群. "Study of Viscose Rayon Based Carbon Fiber Adsorbents Modified by Supporting Silver and Its Physical and Chemical Properties." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/ha2n2u.

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博士<br>國立臺灣科技大學<br>材料科學與工程系<br>99<br>This study concerns the preparation of activated carbon fiber (ACF) adsorbents with antibacterial ability. Viscose rayon-based knitted fabrics is used as the precursor and pre-treated by a composite flame retardant of ammonium sulfate ((NH4)2SO4) and ammonium phosphate dibasic ((NH4)2HPO4) mixed at a ratio 95:5. It then undergoes oxidation, carbonization and activation processes in a semi-open high-temperature erect furnace with three types of activating agents, namely (1) steam + N2, steam + air (N2/O2), and (3) steam +N2/H2, to produce ACF adsorbents with

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Liao, Ying-Yen, and 廖英彥. "Studies on the Rotational States of Adsorbed Molecules, and the Electronic Properties of Quantum Dots." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/19495598661837090133.

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博士<br>國立交通大學<br>電子物理系所<br>94<br>In this dissertation, we study the rotational states of adsorbed diatomic molecules and some physical properties of quantum dots. In part I, an adsorbed dipole molecule confined by a conical well is subject to strong laser fields. The crossover from field-free to hindered rotation motion is observed by varying the hindering angle. Moreover, the rotational states of coupled free and adsorbed molecules with dipolar interaction are further studied. It is shown that the orientation is significantly different from that of an isolated one due to the dipole-dipole inte

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Hughes, Zak E., A. Baev, P. N. Prasad, and T. R. Walsh. "Halo-substituted azobenzenes adsorbed at Ag(111) and Au(111) interfaces: Structures and optical properties." 2017. http://hdl.handle.net/10454/15781.

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Yes<br>The adsorption of azobenzene (AB), ortho fluoro-azobenzene (FAB) and ortho chlor-azobenzol (ClAB), in both the cis and trans isomers, at the Au(111) and Ag(111) surfaces is investigated using plane-wave density functional calculations with the revPBE-vdW-DF functional. The resulting adsorption energies and internal structures of AB adsorbed to both metal surfaces are in broad agreement with available experimental data. In the gas phase, FAB and ClAB feature a significant reduction in the energy difference between the two isomeric states, compared with AB. This relative reduction in the

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