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Relevant bibliographies by topics / Chemistry-apparatus / Dissertations / Theses

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Dissertations / Theses on the topic 'Chemistry-apparatus'

Author: Grafiati

Published: 4 June 2021

Last updated: 29 July 2025

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1

Kuhn, Jay C. "Experimental design for the study of extraction efficiencies of the continuous liquid-liquid extractor." Master's thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-01202010-020253/.

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2

Brown, Frank Reber. "Analytical applications of flow injection analysis." Diss., The University of Arizona, 1987. http://hdl.handle.net/10150/184254.

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The rate of oxidation of copper metal to copper (I) by copper (II) in the presence of organic ligands has been determined for a variety of ligands using a flow injection analysis system to sample the reaction. The results obtained using the FIA sampling method compare favorably with those obtained in eariler work when allyl alcohol was used as the ligand. The mechanism proposed in that earlier work has been shown to be a general mechanism for the oxidation of copper metal in the presence of complexing ligands. It was found that some ligands increase the rate of the reaction beyond the ability

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3

Carroll, Natalie R. Sohlberg Karl William Dr. "Theoretical descriptions of electron transport through single molecules: developing design tools for molecular electronic devices /." Philadelphia, Pa. : Drexel University, 2004. http://dspace.library.drexel.edu/handle/1860/330.

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4

Yang, Liu. "Quantum chemistry studies of molecular electronic devices from electronic structure to current flow /." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 156 p, 2010. http://proquest.umi.com/pqdweb?did=1997524081&sid=7&Fmt=2&clientId=8331&RQT=309&VName=PQD.

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5

Sherman, Kristin Mary Daniels. "Affordances of Instrumentation in General Chemistry Laboratories." Thesis, University of North Texas, 2010. https://digital.library.unt.edu/ark:/67531/metadc30510/.

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The purpose of this study is to find out what students in the first chemistry course at the undergraduate level (general chemistry for science majors) know about the affordances of instrumentation used in the general chemistry laboratory and how their knowledge develops over time. Overall, students see the PASCO system as a useful and accurate measuring tool for general chemistry labs. They see the probeware as easy to use, portable, and able to interact with computers. Students find that the PASCO probeware system is useful in their general chemistry labs, more advanced chemistry labs, and

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6

Wang, Dong. "Making dimers of light-harvesting complexes from purple bacteria using copper–free click chemistry." Thesis, Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0062/document.

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Les complexes collecteurs de lumière des bactéries photosynthétiques absorbent l'énergie solaire, et transfèrent l'énergie avec grande efficacité aux centres réactionnels, siùge où elle est captée pour l'utilisation par la cellule. Nous savons peu des détails du transfert d'énergie entre les différents complexes collecteurs de lumière. Dans cette thèse, j'ai isolé différents complexes collecteurs de lumière à partir de plusieurs souches de bactéries pourpres. J'ai construit de modèles 3D par homologie et les structures possibles de dimères ont également été examinés. Les sites de pontage dans

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7

Klein, Ethan Avram. "A buffer gas cooled molecular beam apparatus for chirped pulse millimeter wave spectroscopy." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/98781.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Chemistry, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 34-36).<br>An apparatus that utilizes buffer gas cooling to produce slow atomic (Ba, Ca) and molecular (BaF, CaF) beams is constructed. In-cell temperatures of 20 ± 0.25K are achieved with chamber cooldown times of under two hours. Laser Induced Fluorescence (LIF) spectra of BaF and CaF confirmed thermalization of the molecular beam to the temperature of the buffer gas and additional hydrodynamic cooling to rotational and tra

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8

Tate, Paul. "Ammonia Sampling using Ogawa® Passive Samplers." Scholar Commons, 2002. http://purl.fcla.edu/fcla/etd/SFE0000021.

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9

Patterson, Hazelyn. "The design and construction of an apparatus for low-temperature dimerization of aliphatic free radicals." DigitalCommons@Robert W. Woodruff Library, Atlanta University Center, 1997. http://digitalcommons.auctr.edu/dissertations/2805.

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This study documents an effort to design and construct an apparatus for the continuous generation hydrogen atoms to convert aliphatic and aromatic molecules to their respective dimers, by free radical mechanisms. The addition of hydrogen atoms to alkene and aromatic molecules, and hydrogen atom abstraction from alkanes by atomic hydrogen, followed by dimerization or disproportionation has been extensively studied. Emphasis here is placed on proving the efficacy of this device by production of known dimeric products. This prototype incorporates critical factors known to effect gas phase free ra

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10

Lui, Siu Man. "Physical characterization and mechanistic studies of the [Fe4S4]-siroheme catalytic apparatus in sulfite and nitrite reductase enzymes /." The Ohio State University, 1994. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487853913101079.

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11

Kim, Sung-Soo. "Surface forces apparatus (SFA) studies on n-octadecyltriethoxysilane self-assembled monolayers on untreated and plasma-treated mica." Diss., The University of Arizona, 2001. http://hdl.handle.net/10150/289739.

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Prehydrolyzed n-octadecyltriethoxysilane (OTE) molecules were self-assembled as a monolayer on both untreated and argon/water vapor plasma-treated mica. The properties and stability of these monolayers have been qualitatively and quantitatively investigated with a surface forces apparatus (SFA) under various environmental conditions The interaction force between the OTE monolayers immersed in water showed that plasma treatment reduced the range of the steep short-range repulsion and motivated the water vapor studies. The humidity tests revealed a substantial monolayer swelling in the untreated

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12

Clasp, Trocia N. "THE THEORETICAL STUDY OF TORSION –VIBRATIONAL DYNAMICS IN METHANOL AND THE IMPROVEMENT OF CW-CRDS EXPERIMENTAL APPARATUS." University of Akron / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=akron1195512567.

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13

Persson, Anita M. "Evaluation of a Miniaturized Rotating Disk Apparatus for In Vitro Dissolution Rate Measurements in Aqueous Media : Correlation of In Vitro Dissolution Rate with Apparent Solubility." Doctoral thesis, Uppsala universitet, Avdelningen för analytisk farmaceutisk kemi, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-112257.

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The general aim of this thesis was to evaluate a newly designed and constructed miniaturized rotating disk apparatus for in vitro dissolution rate measurements of different drug substances from all of the classes in the Biopharmaceutical Classification System (BCS). The new equipment is based on a low volume flow-through cell of Plexiglas, a gold plated magnetic bar and a special designed press. The disk of drug substance (approx. 5 mg) is placed eccentrically in the bar. Rotation speeds were set with a graded magnetic stirrer. An external HPLC pump delivered a continuous flow of aqueous mediu

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14

HUANG, WEI-HUA, and 黃慰華. "Improved Chlorine Gas Microscale Preparation Apparatus Design And It’s Application on Chemistry Teaching." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/68495618227232772001.

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碩士<br>國立高雄師範大學<br>化學系<br>104<br>This research mainly bases on the experiment apparatus of chlorine gas preparation to make microscale teaching aids and to ameliorate the operating process. The main purposes of the research are expecting to decrease the cost of experiment apparatus, to encourage students' interests to conduct experiments by hands, to promote the effects of teaching science subjects, and then to encourage teachers in natural science fields to make their own teaching aids. In order to effectively simplify experiment steps, avoid damaging equipment, decrease the using amount

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15

Sincuba, Nomakhosi Dorothy. "Effect of tray design on the performance of a vibrating plate extraction column." Thesis, 2015. http://hdl.handle.net/10321/1373.

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Submitted in fulfillment of the requirements for the degree of Master of Engineering, Durban University of Technology, Durban, South Africa, 2015.<br>There are various types of separation processes used in industries, such as, distillation, liquid-liquid extraction and gas absorption. Liquid-liquid extraction (LLE) is a separation process that involves mass transfer from a liquid mixture to an immiscible extraction solvent. This process is generally used where the mixture cannot be separated by fractional distillation due to close relative volatilities of the mixture components or for heat sen

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16

Davey, William Lewis Errol. "A real time fluorescent particle counter for atmospheric dispersion studies." Thesis, 1985. http://hdl.handle.net/10413/9084.

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17

Clasohm, Lucy Y. "A surface force apparatus study of the mercury/water interface with and without self-assembled monolayers." 2005. http://arrow.unisa.edu.au:8081/1959.8/45956.

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The surface force apparatus (SFA) has been an important technique for making direct force measurements and has contributed enormously to our understanding of colloidal interactions. The conventional SFA has been limited to measuring forces between solid surfaces, until recently when a modified SFA was developed at the Ian Wark Research Institute [1]. A fluid drop (mercury) is introduced into the apparatus which allows a range of deformable surfaces to be studied in the SFA. This project is an extension of this technique. Interactions between a mica sheet and a mercury drop are studied, includi

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18

Weiss, Falk Dietrich. "Chemisorption of hydrogen(2) and carbon monoxide on positive transition metal cluster ions in an FT-ICR apparatus." Thesis, 1989. http://hdl.handle.net/1911/16308.

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A new FT-ICR apparatus (Fourier Transform - Ion Cyclotron Resonance) has been developed, where clusters produced in a laser vaporization supersonic cluster source were efficiently injected and trapped in an elongated cylindrical Penning type ion trap located in the center of a magnetic field of 6 Tesla. The successful injection of multiple cluster pulses into the ion trap makes the experiment largely independent of the intensity of the supersonic cluster source. Long trapping times of up to 30 minutes and a high mass resolution are additional features of this apparatus. In a first application,

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19

Tshibangu, Mulamba Marc. "High pressure vapour-liquid equilibrium data of fluorochemical systems for various temperatures using a new static apparatus." Thesis, 2010. http://hdl.handle.net/10413/2859.

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The thermodynamic knowledge of accurate phase equilibrium data plays an important role in the design and optimization of separation processes in chemical and engineering industries. Vapour-liquid equilibrium data are essential for the design of efficient separation processes such as distillation. The presented research study is mainly focused on the vapour-liquid equilibrium data measurement of fluorochemical and hydrocarbon binary systems at various temperatures and at high pressures. A new static analytical apparatus was constructed and commissioned for the measurement of accurate and precis

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20

Chiyen, Kaleng Jim. "Modification and commissioning of a static high pressure apparatus and phase equilibria measurements for fluorinated hydrocarbons." Thesis, 2010. http://hdl.handle.net/10413/3695.

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Modifications were undertaken to a static high pressure vapour-liquid equilibrium (VLE) apparatus described by Naidoo [2004]. The alterations were made to improve the sample analysis technique. These modifications included the incorporation of the ROLSITM sampling device into the equilibrium cell, a re-design of the air bath which improved the temperature profile and further alterations described in the text. The equipment has an operating temperature range of 278.15 K to 473.15 K and pressure range of absolute vacuum to 150 bars. The apparatus consisted of an agitated cell in an air-bath. The

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21

Giraud, Lucie. "Interactions et propriétés physico-chimiques de surfaces modèles de biomatériaux." Thèse, 2016. http://hdl.handle.net/1866/19020.

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La surface d’un implant ou d’un système à libération contrôlée de médicament est la première zone en contact avec les systèmes physiologiques. Les propriétés de surface vont alors définir le devenir à court et long termes de ces biomatériaux dans l’organisme. Pour améliorer la biointégration mais aussi l’efficacité des matériaux en contact avec les fluides et tissus biologiques, un fin contrôle des phénomènes se produisant à l’interface biologique est nécessaire. Cette thèse s’intéresse à l’étude de trois types de surfaces pouvant modéliser celles de biomatériaux couramment employés. Dans un

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