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Dissertations / Theses on the topic 'Characterization of ammonium acetate'

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Published: 3 June 2025

Last updated: 31 July 2025

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1

Schofield, Wayne Christopher Edward. "Factors affecting the performance of magnesium hydroxide flame retardant fillers in an ethylene vinyl acetate copolymer." Thesis, Manchester Metropolitan University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.297579.

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2

Li, Wenjing. "Characterization of the ammonium transporter family AMF1 in maize." Thesis, The University of Sydney, 2017. http://hdl.handle.net/2123/18646.

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Ammonium is an important inorganic nitrogen source utilized by plants. The uptake of ammonium by plant roots involves two types of ammonium transport pathways, the high-affinity ammonium transporters (HATS) and the low-affinity ammonium transporters (LATS). Genes encoding HATS proteins have been studied well in plants while the LATS pathway is not sufficiently understood. Recently, through a transcriptional linkage to a membrane bound transcription factor, bHLHm1, a novel family of ammonium transporters, AMF1 (ammonium facilitator 1) were discovered. Heterologous expression of yeast and soybea

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3

Chee, Pui Shan. "Ammonium and Acetate Ion Uptake on Stationary Phases in Hydrophilic Interaction Chromatography by the Minor Disturbance Method." Thesis, Umeå universitet, Kemiska institutionen, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-103379.

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4

Moberg, Sofia. "Investigating the methane producing pathway in lab-scale biogas reactors subjected to sequential increase of ammonium and daily acetate-pulsing." Thesis, Linköpings universitet, Institutionen för fysik, kemi och biologi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-167519.

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Syntrophic acetate oxidizing bacteria convert acetate into hydrogen and carbon dioxide and through the mutualistic syntrophic partnership with methanogens the products are further converted to methane in biogas processes operating at high ammonia concentrations. There is very little known about SAOBs, only five have been characterized and had their genome analyzed. The aim of this project was to gain further knowledge about the methane producing pathway of SAOBs with a proteomic approach. Proteins were extracted from biogas sludge with a phenol-based approach and trypsin digestion and peptide

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5

Thaha, Fathuma Zuleikha. "Characterization of acetate metabolism genes in Sinorhizobium, Rhizobium, meliloti." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0016/MQ55093.pdf.

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6

Mathen, J. J., A. J. Augustine, J. Sebastian, J. Madhavan, and G. P. Joseph. "Synthesis and Characterization of Polyethylene Vinyl Acetate / ZnSe Nanocomposite." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35635.

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In the not too distant past, polymer scientists and technologists expanded their horizons from consum-er products to the high technology arena, particularly notable in opto - electronic applications. Ethylene Vinyl Acetates (EVA) are popular because of their superior adhesion to most substrates as well as their ease of formulation. Its High transparency is a key attribute for photovoltaic cell encapsulation. It is ex-pected that with the addition of ZnSe nano fillers, EVA becomes a high refractive index polymer (HRIP) with refractive index 2.5 and posses anti-reflective property. In this work,

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7

Yang, Yan. "Characterization of polyethylene terephthalate, cellulose acetate and their blends." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-03302010-020651/.

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8

Lowe, Jared M. "Synthesis and Characterization of Rhodium Acetate with Functionalized Benzonitriles." Digital Commons @ East Tennessee State University, 2015. https://dc.etsu.edu/honors/282.

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Dirhodium complexes are effective catalysts in carbene transformations. These reactions involve chemistry between the catalyst and a carbene generated in situ. In order to better understand the rhodium-carbon bond, studies of rhodium acetate, Rh2(OAc)4, and a variety of functionalized benzonitriles were proposed. Diadducts of rhodium acetate with 4-nitrobenzonitrile, 4-aminobenzonitrile, 4-(dimethylamino)benzonitrile, and 3,5-dinitrobenzonitrile were successfully prepared and characterized by X-ray crystallography. IR and NMR spectroscopy were also employed for characterization purposes.

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9

Schollin, Mårten. "Reaction Mechanism between Chitosan and Cerium(VI) Ammonium Nitrate for Production of a Greener Poly(Vinyl Acetate) Adhesive." Thesis, KTH, Skolan för kemi, bioteknologi och hälsa (CBH), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-290297.

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Poly(vinyl acetate) (PVAc) has a major application as an indoor wood adhesive. Low water stability is however, one of the greatest drawbacks of PVAc. By grafting PVAc from a chitosan (CS) backbone (CS-graft- PVAc) water stability of adhesive is increased while good mechanical and adhesive properties are retained. Simultaneously the percentage of bio-based content is increased. This work investigates the proposed re- action mechanisms between chitosan and cerium(IV) ammonium nitrate (CAN) which is used as an initiator for the grafting reaction. Litera- ture studies showed one dominating reactio

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10

Schäfer, Arne. "Characterization of ammoniumtransporters in Arabidopsis thaliana." Phd thesis, Universität Potsdam, 2005. http://opus.kobv.de/ubp/volltexte/2005/593/.

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Nitrogen is often a limiting factor for plant growth due to its heterogenous distribution in the soil and to seasonal and diurnal changes in growth rates. In most soils, NH4+ and NO3 – are the predominant sources of inorganic nitrogen that are available for plant nutrition. In this context, plants have evolved mechanisms that enable them to optimize nitrogen acquisition, which include transporters specialized in the uptake of nitrogen and susceptible to a regulation that responds to nitrogen limiting or excess conditions. Although the average NH4+ concentrations of soils are generally 100 to 1

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11

Casterlow, Samantha Alexandra. "Characterization and Pharmacokinetics of Rifampicin Laden Carboxymethylcellulose Acetate Butyrate Particles." Thesis, Virginia Tech, 2012. http://hdl.handle.net/10919/42659.

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Tuberculosis, caused by Mycobacterium tuberculosis (MTB), is a common and potentially lethal infectious human disease. Rifampicin is a front line anti-tuberculosis drug usually prescribed in combination with isoniazid, pyrazinamide and streptomycin for a period of six to seven months. When given orally for the treatment of MTB, rifampicin exhibits low bioavailability. Recent attempts to increase bioavailability and decrease dosage of anti-tuberculosis drugs have focused on creating polymer coated rifampicin nanoparticles. The research effort presented in this thesis evaluates the formation, ch

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12

Wacker, Tobias [Verfasser], and Susana [Akademischer Betreuer] Andrade. "Electrophysiological characterization of Ammonium transport proteins = Elektrophysiologische Charakterisierung von Ammoniumtransportproteinen." Freiburg : Universität, 2015. http://d-nb.info/1115813951/34.

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13

Tamami, Mana. "Synthesis and characterization of ammonium ionenes containing hydrogen bonding functionalities." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/19234.

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Ammonium ionenes are polycations that have quaternary nitrogens in their macromolecular backbone and are synthesized via step-growth polymerization technique. They offer interesting coulombic properties, and the synthetic design provides control over charge density. Non-covalent interactions including nucleobase hydrogen bonding and electrostatics were studied in ammonium ionenes. The non-covalent interactions are expected to increase the effective molecular weight of polymeric precursors and induce microphase separation due to intermolecular associations. The influence of non-covalent interac

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14

Borgerding, Erika Michelle. "Synthesis, Molecular Weight Characterization and Structure-Property Relationships of Ammonium Ionenes." Thesis, Virginia Tech, 2007. http://hdl.handle.net/10919/35613.

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Ammonium ionenes are macromolecules with quaternized nitrogen groups in the main chain. Ionenes are commonly referred to as x,y-ionene, where x and y represent the number of methylene groups between quaternized nitrogens. Synthesis of aliphatic ammonium ionenes has been studied since the early twentieth centuryÍ¾ however, absolute molecular weight characterization has only been performed using extensive light scattering and viscosity experiments. Performing aqueous size exclusion chromatography (SEC) on ammonium ionenes provides absolute molecular weight determinations while eliminating the

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15

Ellerbeck, Matthias [Verfasser], and Martin [Akademischer Betreuer] Parniske. "Identification and characterization of glomeromycotan ammonium transporters / Matthias Ellerbeck. Betreuer: Martin Parniske." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2013. http://d-nb.info/1098130812/34.

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16

Meng, Lingyu. "Development of an Analytical Method for Distinguishing Ammonium Bicarbonate from the Products of an Aqueous Ammonia Co2 Scrubber and the Characterization of Ammonium Bicarbonate." TopSCHOLAR®, 2004. http://digitalcommons.wku.edu/theses/243.

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The link between anthropogenic emissions of CO2 with increased atmospheric CO2 levels and, in turn, with increased global temperature has been well established and accepted. Using aqueous ammonia to capture CO2 and produce an inexpensive nitrogen fertilizer, ammonium bicarbonate (ABC) has been thought as a feasible approach to CO2 sequestration. Due to the different concentrations of reactants and reaction conditions, different carbon-ammonium composites can be produced. In view of achieving a maximum of NH3 utilization in the capture of CO2, the product of ABC will be ideal. Hence the ABC in

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17

Hradetzky, Eva. "Molecular characterization and evaluation of the methylazoxymethanol acetate (MAM-E17) rat model for schizophrenia." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610121.

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18

Hernández, Frederick Camila José [Verfasser], and Susana [Akademischer Betreuer] Andrade. "Structural and functional characterization of a novel Ammonium Transport protein from “Candidatus Kuenenia stuttgartiensis” = Strukturelle und funktionelle Charakterisierungeines neuartigen Ammonium Transport Proteins aus"Candidatus Kuenenia stuttgartiensis"." Freiburg : Universität, 2011. http://d-nb.info/1123472424/34.

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19

Moore, Tabitha Gale Bryant. "Functional characterization of equine neutrophils in response to calcium ionophore A23187 and phorbol myristate acetate." Thesis, This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-06102009-063430/.

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20

Basgorenay, Burcu. "Preparation And Characterization Of Hydroxyapatite Containing Acrylic Bone Cements." Master's thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605675/index.pdf.

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Acrylic bone cements are one of the most important biomaterials used in orthopaedic surgery and dental applications to fill the cavities or provide mechanical interlock between prosthesis and the bone. Their biocompatibility can be increased by addition of different materials into the formulation, such as hydroxyapatite. Besides all the advantages, bone cements have several drawbacks including tissue necrosis, chemical necrosis, shrinkage of the cement and aseptic loosening. Therefore painstaking research and study are carried out on development of new formulations to improve mechanical and th

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21

Awobusuyi, Tolulope David. "Concentration of Ammonium from Dilute Aqueous Solutions using Commercially Available Reverse Osmosis Membranes." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/34642.

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Several commercially available reverse osmosis (RO) membranes were characterized with aqueous solutions of ammonium sulfate, potassium triphosphate, and mixtures of these two salts at different feed concentrations, compositions and pressures. The objective of this study was to investigate the rejection of these solutes, in particular the ammonium ion (NH4+), by different RO membranes. The aqueous solutions were assumed to come from an anaerobic digester via a process, currently under investigation by CHFour Biogas Inc., to maintain low concentrations of ammonia in the digester in order to maxi

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22

Brito, Ana Sofia. "Characterization of the Mep2 transceptor role in yeast filamentation induction." Doctoral thesis, Universite Libre de Bruxelles, 2020. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/313512.

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The dimorphic transition from the yeast to the filamentous form of growth allows cells to explore their environment for more suitable niches and is often crucial for the virulence of pathogenic fungi. In contrast to their Mep1/3 paralogues, fungal Mep2-type ammonium transport proteins of the conserved Mep-Amt-Rh family have been assigned an additional receptor role required to trigger the filamentation signal in response to ammonium scarcity. Here, genetic, kinetic, expression and structure-function analyses were used to shed light on the poorly characterized signaling role of Saccharomyces ce

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23

Frey, Randall Scott. "Characterization of estrogen and glucocorticoid receptors, skeletal muscle protein turnover and tissue growth in lambs treated with trenbolone acetate and estradiol." Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/43857.

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<p>A study was conducted to determine the effects of trenbolone acetate (TBA) and estradiol-17B (E2) implantation on the characteristics of the glucocorticoid and E2 receptor, skeletal muscle protein turnover and tissue growth. Twenty-four lambs were utilized. Trenbolone acetate did not ,affect (P>.10) degradation rates in the semitendinosus (ST) and triceps brachii (TB) muscles, the production of cortisol, adrenal weights and cytosolic glucocorticoid binding capcity (Bmax). Trenbolone acetate decreased synthesis rate of muscle protein (P<.Ol), the percent of [3H] dexamethasone binding in the

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24

MURATORE, CHIARA. "CHARACTERIZATION OF PROTEOMIC CHANGES IN CROPS DURING METABOLIC ADAPTATION TO DIFFERENT NITROGEN INPUTS." Doctoral thesis, Università degli Studi di Milano, 2023. https://hdl.handle.net/2434/951273.

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Nitrogen availability is one of the major factors that influence plant growth, morphology, and metabolism and, hence, crop productivity. In agricultural soils, nitrogen is present in different forms, both inorganic (nitrate and ammonium) and organic (amino acids, short peptides and urea), with variable and heterogeneous distribution. Nowadays, improving knowledge about the nitrogen nutrition in plants is crucial to address the urgent need for a more sustainable agricultural production. In the last years, the “-omics” approaches provided a holistic perspective of the molecular mechanisms underl

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25

Illanes, Teresa. "Synthesis of Novel Degradable Polymers for Tissue Engineering by Radical Polymerization : Synthesis and characterization of 2-methylene-1,3-dioxepane and copolymerization thereof with vinyl acetate followed by polymer characterization and hydrolysis." Thesis, KTH, Skolan för kemivetenskap (CHE), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-33107.

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The commercial field of radical polymerized polymers, such as polyvinyl alcohol, is very broad partly because they are easy to polymerize and cheap. One aspect that could improve their commercial range is to enhance their degradation rate. As the environmental aspect of polymers grows bigger an enhancement of biological degradation is a great improvement. This thesis deals with the prospect of polymerizing polyvinyl alcohol with degradable linkages in the main chain. In order to achieve the aim the monomer 2-methylene-1,3-dioxepane is successfully synthesized and characterized. The synthesis i

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26

Costin-Hogan, Crissy. "Two particle studies 1) a microscopic evaluation of "clay mimics" + their intercalates, and 2) synthesis and characterization of metal halides with ammonium cations /." Master's thesis, Mississippi State : Mississippi State University, 2008. http://library.msstate.edu/etd/show.asp?etd=etd-07102008-121653.

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27

Latimer, Matthew T. "Characterization of the genes and gene products of the acetate-activating enzymes and a novel iron-sulfur flavoprotein from Methanosarcina thermophila strain TM-1." Diss., Virginia Tech, 1993. http://hdl.handle.net/10919/40034.

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The genes encoding the acetate kinase and phosphotransacetylase enzymes from <i>Methanosarcina thermophila</i> were isolated from a genomic library on a fifteen kilobase fragment The genes are located adjacent to one another, with the phosphotransacetylase gene (<i>pta</i>) directly upstream of the acetate kinase gene (<i>ack</i>). The two genes were sequenced, along with a third Open Reading Frame (designated <i>orfY</i>). The <i>orfY</i> gene appears to encode a novel protein whose physiological function has yet to be determined.<br>Ph. D.

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28

Dantas, Patrícia Allue. "Géis superabsorventes de propionato acetato de celulose e acetato de celulose: síntese, caracterização e liberação controlada de pesticida." Universidade Federal de São Carlos, 2011. https://repositorio.ufscar.br/handle/ufscar/1166.

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Made available in DSpace on 2016-06-02T19:19:54Z (GMT). No. of bitstreams: 1 DANTAS_Patricia_2011.pdf: 2256820 bytes, checksum: e36b1fbb6b7a53c4ba196910208d1dd3 (MD5) Previous issue date: 2011-12-16<br>Financiadora de Estudos e Projetos<br>Hydrogels derived from cellulose acetate propionate (CAP) and cellulose acetate (CA) were synthesized with the cross-linking agents PMDA (Pyromellitic Dianhydride) and BTDA (Dianhydride 3, 3 ', 4, 4' Benzophenone Tetracarboxylated) with 3:1 stoichiometry in relation to the mass of the crosslinker agent x mass of available hydroxyls in the polymer chain. Th

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29

Cheng, Shijing. "Synthesis and Characterization of Cation-Containing and Hydrogen Bonding Supramolecular Polymers." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/77185.

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Non-covalent interactions including nucleobase hydrogen bonding and phosphonium/ammonium ionic aggregation were studied in block and random polymers synthesized using controlled radical polymerization techniques such as nitroxide mediated polymerization (NMP) and reversible addition-fragmentation chain transfer polymerization (RAFT). Non-covalent interactions were expected to increase the effective molecular weight of the polymeric precursors through intermolecular associations and to induce microphase separation. The influence of non-covalent association on the structure/property relationship

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30

Mühlbauer, Andrea. "Synthesis and physicochemical characterization of novel biocompatible ionic liquids for the solubilization of biopolymers." Thesis, Lille 1, 2014. http://www.theses.fr/2014LIL10203.

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Dans le contexte de la chimie verte, on trouve des solvants alternatifs, comme les liquides ioniques (LIs) et les eutectiques profonds (DESs). L'objectif de la thèse était de développer de nouveaux LIs et DESs biocompatibles pour la solubilisation de biopolymères (e.g. cellulose). Les alkylammonium quaternaires à chaîne courte (C3 à C6) bi- et tricaténaires associés à divers carboxylates d'origine naturelle se sont révélés être de bons candidats et ont permis d'identifier les effets structuraux clés pour la solubilisation de la cellulose. Par cette approche systématique couplée à une étude phy

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31

Chen, Keke. "Roll-to-Roll Manufacturing and Real-Time Characterization of Bio-Functional Polymers." University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1548177736839976.

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32

Kuprov, Roman Yuri. "Design and Characterization of a Human Exposure Chamber and Inversion Episodes in Salt Lake City, Utah in January/February of 2009." BYU ScholarsArchive, 2009. https://scholarsarchive.byu.edu/etd/1901.

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Research on health effects of particulate matter (PM) has been a very active area in the last two decades. One plausible mechanism by which exposure to PM affects human health includes modification of autonomic endothelium function. Decreased endothelium activity causes heightened risks of cardiovascular disease. A human exposure chamber designed to conduct experiments to quantify diminished function of endothelium from short term exposure to PM is described. The chamber consists of two stages for containment and pre-treatment of PM and exposure of human subjects. Concentrations of CO, CO2, NO

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33

Joncour, Roxan. "Nouvelles voies de synthèses du paracétamol et de son précurseur." Thesis, Lyon 1, 2014. http://www.theses.fr/2014LYO10295/document.

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Le paracétamol est un analgésique parmi les plus consommés dans le monde. Les synthèses actuelles de cette molécule induisent la formation de quantités non-négligeables de sels ou de produits secondaires non valorisables. En plus d'induire de faibles économies d'atomes, la présence de ces déchets engendre des surcoûts importants pour la synthèse du paracétamol dus aux lourds traitements des réactions. Les objectifs de la thèse étaient à la fois de proposer une synthèse plus respectueuse de l'environnement mais également économiquement viable. En ce sens, deux synthèses du paracétamol ont été é

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34

Wittmar, Matthias. "Charge modified, comb-like graft polyesters for drug delivery and DNA vaccination synthesis and characterization of poly(vinyl dialkylaminoalkylcarbamate-co-vinyl acetate-co-vinyl alcohol)-graft-poly(D,L-lactide-co-glycolide)s /." [S.l.] : [s.n.], 2004. http://archiv.ub.uni-marburg.de/diss/z2004/0075/.

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35

Okon, Edidiong. "Preparation, characterization and carrier gas transport characteristics of inorganic and organic membranes for application in lactic acid esterification with ethanol." Thesis, Robert Gordon University, 2018. http://hdl.handle.net/10059/3123.

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Ethyl lactate (EL) plays a major role as green solvent and also a replacement for most petrochemical solvents. The esterification process of lactic acid and ethanol to produce EL is an equilibrium-limiting reaction and the selective removal of one of the reaction products can be improved using a membrane reactor and when coupled with a heterogeneous catalyst offers an opportunity for process intensification. This thesis investigates the batch process esterification reaction involving lactic acid (LA) and ethanol (EL) in the presence of a water selective membrane using different cation-exchange

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Nordell, Erik. "Effekter av Zeoliter i Biogasproduktion." Thesis, Linköping University, Biotechnology, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-16761.

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<p>Biogas är benämningen för metangas (CH<sub>4</sub>) som är producerad via anaerob (syrefri) rötning av biologiskt material. I Linköping finns en av Sveriges största biogasanläggningar. Anläggningen drivs av Svensk Biogas AB som ägs av Tekniska Verken i Linköping AB (publ.). I anläggningen rötas stora mängder proteinrikt substrat vilket leder till höga halter av ammoniak (NH<sub>3</sub>) och ammonium (NH<sub>4</sub><sup>+</sup>) i rötkammaren. Ammoniak (NH<sub>3</sub>) är toxiskt för de metanbildare som i en välmående process står för den största delen av metangasproduktionen. Höga halter av

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Čebo, Daniel [Verfasser], and Susana [Akademischer Betreuer] Andrade. "Site-directed mutagenesis as a tool for functional characterization of the Ammonium Transport Protein Amt-1 from Archaeoglobus fulgidus = Ortsspezifische Mutagenese als ein Werkzeug für die funktionelle Charakterisierung des Ammoniumtransportproteins Amt-1 aus Archaeoglobus fulgidus." Freiburg : Universität, 2010. http://d-nb.info/1123458367/34.

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Nethavhanani, Takalani. "Synthesis of zinc oxide nanoparticles by a green process and the investigation of their physical properties." University of the Western Cape, 2017. http://hdl.handle.net/11394/6295.

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Magister Scientiae - MSc (Physics)<br>Zinc oxide (ZnO) is a wide and direct semiconductor with a wurtzite crystal structure. Its multifunctionality as the ideal candidate in applications such as blue-UV light emitting diodes, transparent conducting oxide, selective gas sensor and efficient catalyst support among others, has attracted a significant interest worldwide. Nano-scaled ZnO has been synthesized in a plethora of shapes. A rich variety of physical and chemical methodologies have been used in the synthesis of undoped or doped ZnO. However, such methods either necessitate relatively

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Sànchez, Melsió Alexandre. "From inocula to biological reactors: molecular characterization of N-cycle bacterial assemblages in a PANAMMOX process." Doctoral thesis, Universitat de Girona, 2015. http://hdl.handle.net/10803/383761.

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Nowadays, the combination of the autotrophic nitrification together with heterotrophic denitrification is the most common process for N-removal in the WWTPs. However, when the C:N ratio is low, this two-step process does not properly work and an external C source must be added. The anammox bacteria are the target of this thesis, capable to oxidize ammonium under chemolithotrophic and anaerobic conditions. The main aim of this doctoral thesis is the search and enrichment of the anammox bacteria for a long time period, in order to be used as inocula for an anammox bioreactor. Once identified, se

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Karandikar, Hrushikesh M. "Suitability of cellulose ester derivatives in hot melt extrusion.Thermal, rheological and thermodynamic approaches used in the characterization of cellulose ester derivatives for their suitability in pharmaceutical hot melt extrusion." Thesis, University of Bradford, 2015. http://hdl.handle.net/10454/14862.

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Applications of Hot Melt Extrusion (HME) in pharmaceuticals have become increasingly popular over the years but nonetheless a few obstacles still remain before wide scale implementation. In many instances these improvements are related to both processing and product performance. It is observed that HME process optimisation is majorly focused on the active pharmaceutical ingredient's (API) properties. Characterising polymeric properties for their suitability in HME should be equally studied since the impact of excipients on both product and process performance is just as vital. In this work, tw

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Karandikar, Hrushikesh M. "Suitability of cellulose ester derivatives in hot melt extrusion : thermal, rheological and thermodynamic approaches used in the characterization of cellulose ester derivatives for their suitability in pharmaceutical hot melt extrusion." Thesis, University of Bradford, 2015. http://hdl.handle.net/10454/14862.

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Applications of Hot Melt Extrusion (HME) in pharmaceuticals have become increasingly popular over the years but nonetheless a few obstacles still remain before wide scale implementation. In many instances these improvements are related to both processing and product performance. It is observed that HME process optimisation is majorly focused on the active pharmaceutical ingredient's (API) properties. Characterising polymeric properties for their suitability in HME should be equally studied since the impact of excipients on both product and process performance is just as vital. In this work, tw

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42

Isreb, Abdullah. "The use of solubility parameters to predict the behaviour of a co-crystalline drug dispersed in a polymeric vehicle : approaches to the prediction of the interactions of co-crystals and their components with hypromellose acetate succinate and the characterization of that interaction using crystallographic, microscopic, thermal, and vibrational analysis." Thesis, University of Bradford, 2012. http://hdl.handle.net/10454/5525.

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Dispersing co-crystals in a polymeric carrier may improve their physicochemical properties such as dissolution rate and solubility. Additionally co-crystal stability may be enhanced. However, such dispersions have been little investigated to date. This study focuses on the feasibility of dispersing co-crystals in a polymeric carrier and theoretical calculations to predict their stability. Acetone/chloroform, ethanol/water, and acetonitrile were used to load and grow co-crystals in a HPMCAS film. Caffeine-malonic acid and ibuprofennicotinamide co-crystals were prepared using solvent evaporation

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Wu, Yu-Kai, and 吳玉凱. "Characterization an Preparation of Quaternary Ammonium Membrane." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/17113586406817461140.

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碩士<br>元智大學<br>化學工程學系<br>91<br>Up to now, many research have successfully used anion exchange membrane in seawater desalination、in the recovery of metal ions from waste water and in electrodialysis experiments.Because quaternary ammonium membranes have catalytic effect in two phase reaction systems,the purpose of this paper is first to prepare quaternary membranes,and them use them as transfer catalysts for the allylation of phenol in a vertical membrane recator.The experiment resoults are then used to estimate the feasibility of using quaternary ammonium membrane in the phase transfer cataly

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施龍幃. "Characterization of acetate-resistant mutants of Zymomonas mobilis." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/98658871269303144172.

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碩士<br>國立嘉義大學<br>生物醫藥科學研究所(Graduate Institute of Biomedical<br>98<br>Zymomonas mobilis is the most efficient ethanol producer among the candidates with the production of 1.5-1.9 mol ethanol from each mol glucose, and the production rate is 3-5 fold higher than that of Saccharomyces cerevisiae. However, processes for the hydrolysis of lignocellulosic also produce substances, like as acetic acid is inhibitory to growth and ethanol production of Z. mobilis. The pH value of the ATCC 31821 broth was lower than the acetate-resistant mutants, ATCC 31823 broth, and Z. mobilis ATCC 31823 produced less o

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Jiang, Wun-Jie, and 江文傑. "Preparation and Characterization of Polylactide/Cellulose Acetate Composites." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/88593186674281281498.

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碩士<br>高苑科技大學<br>化工與生化工程研究所<br>100<br>The biocompatibility, morphology, and mechanical thermal properties of composite materials composed of maleic anhydride-grafted polylactide (PLA-g-AA) and cellulose acetate (CA) were evaluated. Composites containing maleic anhydride-grafted PLA (PLA-g-AA/CA) exhibited noticeably superior mechanical properties due to greater compatibility between the two components. The dispersion of CA in the PLA-g-AA matrix was highly homogeneous as a result of ester formation, and the consequent creation of branched and cross-linked macromolecules, between the carboxyl gr

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Lin, Winston, and 林嘉俊. "Preparation and Characterization of Polyvinyl Acetate Resin Nanocomposites." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/7adqag.

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碩士<br>中原大學<br>化學研究所<br>106<br>In this study, there are two kinds of natural and synthetic inorganic layered materials, these layered materials were organomodified by organo modifiers, SDS (Sodium dodecyl sulfate), K2 (disodium cocoamphodipropionate), and DT-TEOS (dimethyloctadecyl[3-(trimethoxysilyl)propyl]ammonium chloride-tetraethyl orthosilicate) by ion exchange method to make organomodified layered materials. In the morphology of modified was layered materials measured by X-ray diffraction (WXRD), Scanning electron microscope (SEM) and Fourier transfer infra spectroscopy (FT-IR). The modif

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Shiu, Yu-Jiun, and 許毓鈞. "Characterization of Zymomonas mobilis mutants of acetate and glucose tolerance." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/36061919917028989454.

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Carinder, William H. "Effectiveness of ammonium acetate or sodium diacetate as a feed additive on milk production and composition by dairy cows." 1987. http://hdl.handle.net/2097/22282.

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Huang, Chueh-Jung, and 黃鵲容. "Synthesis and Characterization of Silver-Poly(vinyl acetate) Metal Chelate Nanocomposites." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/32021321334301922977.

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博士<br>國立中興大學<br>材料工程學研究所<br>93<br>A new chemical route for the synthesis of metal-polymer nanocomposite has been developed. Commercial poly(vinylacetate) (PVAc) was used as polymer matrix, silver nanoparticles were generated by reduction of silver nitrate (AgNO3) in PVAc matrix, and a PVAc-AgNO3 metal chelate polymer (MCP) containing both the Ag(0) crystal and Ag(I) complex ions was obtained. The reaction mechanism of the MCP system, including the coordination of polymer-Ag(I) complexes, the reduction of Ag(I) ions and the hydrolysis of PVAc chains were investigated. The results showed that

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Huang, Chih-Yuan, and 黃致遠. "Preparation and Characterization of Cellulose Acetate Propionate / (Poly(Butylene Terephthalate)) Blends." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/88903894961553902328.

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碩士<br>國立臺灣大學<br>高分子科學與工程學研究所<br>104<br>Three divided parts were contained in this thesis. In the first part, cellulose acetate propionate (CAP) was synthesized by using acid anhydride as an acylating agent, sulfuric acid as a catalyst and acid as a dispersion medium from natural cellulose through heterogeneous esterification. The effects of reaction temperature, reaction time and the molar ratio of propionic anhydride to acetic anhydride on esterification were investigated. The molecular weight, chemical structure, crystallization behavior and thermal properties of CAP were investigated using

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