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Dissertations / Theses on the topic 'Organic compounds Solubility'

Author: Grafiati

Published: 4 June 2021

Last updated: 5 February 2022

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1

Yang, Gang. "Aqueous solubility prediction of organic compounds." Diss., The University of Arizona, 2004. http://hdl.handle.net/10150/298795.

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Aqueous solubility is one of the most important physical properties to consider in drug discovery and development. Drug candidates with poor solubility often have poor bioavailability, which leads to increased developmental cost and efforts. Therefore, there is a strong trend to perform solubility screening of drug candidates as early as possible in the drug discovery and development process. While experimental methods are being developed to increase the throughput of solubility measurement, the development of aqueous solubility prediction methods can be a powerful complementary tool. This dis

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2

Pinal-Calvillo, Rodolfo. "Estimation of aqueous solubility of organic compounds." Diss., The University of Arizona, 1988. http://hdl.handle.net/10150/184463.

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The relationship between aqueous activity coefficients (log γ(w)) and different physico-chemical properties has been studied for a number of solutes by both empirical correlations as well as by applying existing theoretical models. The solute properties selected have been classified into three categories: geometrical, polar, and electrostatic. The solutes chosen were divided into two major groups: (a) Training Set. Structurally simple compounds, i.e., each containing only one functional group, and (b) Test Set. A series of drugs and pollutants covering a wide variety of functional groups. The

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3

Mishra, Dinesh Shyamdeo. "Solubility of organic compounds in nonaqueous systems." Diss., The University of Arizona, 1989. http://hdl.handle.net/10150/184667.

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Solubility of drugs in non-aqueous systems is very important in understanding the partitioning and transport behavior. The present study was undertaken to evaluate the entropic and enthalpic contribution to activity coefficient of organic compounds (polycyclic aromatic hydrocarbons, aliphatic acids, aliphatic alcohols etc.) in non-aqueous solvents. The activity coefficient can be written as: ln γ₁ = ln γ₁ᶜ + ln γ₁ʳ where superscript "c" and "r" denote entropic (combinatorial) and enthalpic contribution respectively. We selected three solvent systems: benzene, triolein and octanol. The differen

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4

Tick, Geoffrey Ray. "Dissolution and enhanced solubilization of immiscible phase organic liquids in porous media : Theoretical, laboratory, and field investigations." Diss., The University of Arizona, 2003. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu_e9791_2003_398_sip1_w.pdf&type=application/pdf.

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5

Morris, Kenneth Robert 1951. "THE SOLUBILITY OF HYDROPHOBIC POLLUTANTS IN WATER-COSOLVENT MIXTURES." Thesis, The University of Arizona, 1986. http://hdl.handle.net/10150/276659.

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6

Gupta, Ankur Kumar. "Measurement of Henry's constants of volatile organic compounds in aqueous solutions using headspace gas chromatography." Thesis, Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/11209.

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7

Admire, Brittany. "The Estimation of Biologically and Environmentally Relevant Properties of Organic Compounds." Diss., The University of Arizona, 2015. http://hdl.handle.net/10150/556008.

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The UPPER (Unified Physicochemical Property Estimation Relationships) model uses additive and non-additive parameters to estimate 21 biologically and environmentally important physicochemical properties of organic compounds. Thermodynamically sound relationships are used to predict boiling and melting points, aqueous and octanol solubilities, vapor pressure and the air-octanol, air-water and octanol-water partition coefficients. These properties determine the distribution and fate of organic compounds in biological and environmental systems. The model has been validated on a data set of 2000 h

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8

Ngo, Truc Thanh. "Applications of spectroscopy to study the phase equilibria of organic solids and the processing of polymers in supercritical fluids." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/11013.

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9

Mandiwana, KL, N. Panichev, M. Kataeva, and S. Siebert. "The solubility of Cr(III) and Cr(VI) compounds in soil and their availability to plants." Elsevier, 2007. http://encore.tut.ac.za/iii/cpro/DigitalItemViewPage.external?sp=1000802.

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The mystery surrounding high concentrations of Cr(III) in plants has been uncovered. It is attributed to the presence of low molecular weight organic acids (LMWOA) in soil in which the plants are growing. Apart from that, the factors influencing solubility of Cr(VI) in soil have also been investigated. It was found that the solubility of Cr(VI) species is governed by the presence of CO3 2− ions in a soil solution that resulted when atmospheric CO2 dissolves in soil–water. Concentrations of Cr(VI) and Cr(III) were determined in plants, collected on unpolluted soils in different geographical are

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10

Mullins, Paul Eric. "Application of COSMO-SAC to Solid Solubility in Pure and Mixed Solvent Mixtures for Organic Pharmacological Compounds." Thesis, Virginia Tech, 2007. http://hdl.handle.net/10919/31086.

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<p>In this work, we present two open literature databases, the VT-2005 Sigma Profile Database and the VT-2006 Solute Sigma Profile Database, that contain sigma profiles for 1,645 unique compounds. A sigma profile is a molecular-specific distribution of the surface-charge density, which enables the application of solvation-thermodynamic models to predict vapor-liquid and solid-liquid equilibria, and other properties. The VT-2005 Sigma Profile Database generally focuses on solvents and small molecules, while the VT-2006 Solute Sigma Profile Database primarily consists of larger, pharmaceutical

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11

Boving, Thomas Bernhard. "Performance and simulation of chemically enhanced solubilization and removal of residual chlorinated solvents from porous media." Diss., The University of Arizona, 1999. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu_e9791_1999_154_sip1_w.pdf&type=application/pdf.

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12

Mohammed, Warda. "Optimizing Sample Dissolution Methods of Low Water Soluble Intermediate Organic Compounds to Support Environmental Risk Assessment during Active Pharmaceutical Ingredient Manufacturing." Thesis, Örebro universitet, Institutionen för naturvetenskap och teknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-93416.

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This project focus on investigating the dissolution of low water-soluble intermediate organic compounds called active pharmaceutical ingredients (API) and organic substances that are manufactured by a pharmaceutical company, Cambrex Karlskoga in Sweden. Several dissolution methods were used and evaluated using methods including total organic carbon (TOC), chemical oxygen demand (COD), biochemical oxygen demand (BOD) and Microtox toxicity test. The selection of solvents were based on previous studies and specifications from the Swedish Institute of Standards, SIS.The performance of eight solven

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13

Frazier, Jeffrey A. "Evaluation of the physico-chemical mechanisms by which residual cooking liquor retards kraft delignification." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/7029.

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14

Batista, Matheus Maciel 1980. "Determinação dos parâmetros de solubilidade de Hansen de ésteres graxos etílicos." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266980.

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Orientadores: Maria Alvina Krähenbühl, Reginaldo Guirardello<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-16T22:23:44Z (GMT). No. of bitstreams: 1 Batista_MatheusMaciel_M.pdf: 1974799 bytes, checksum: cced913200b0e245fb7dc04c7338b0da (MD5) Previous issue date: 2010<br>Resumo: Os parâmetros de solubilidade tridimensional definidos por Hansen são baseados em forças de dispersão entre as unidades estruturais, interações entre os grupos polares e de ligação de hidrogênio. Para compostos, tais como ésteres gr

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15

Ferreira, Sayonara Brederode. "Estudos laboratoriais para avaliação do ootencial de contaminação de água e de solo por gasolina oxigenada." Universidade de São Paulo, 2000. http://www.teses.usp.br/teses/disponiveis/18/18132/tde-11122002-134550/.

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Em muitos países e principalmente no Brasil, compostos oxigenados tais como etanol e metil terta-butil-éter (MTBE) têm sido adicionados à gasolina em cerca de 26% do seu volume para aumentar a octanagem do motor e diminuir a emissão de monóxido de carbono e os níveis de ozônio na atmosfera. O derramamento de tais gasolinas, referidas como gasolina oxigenada tem um efeito cosolvente, provocando um aumento da concentração dos hidrocarbonetos na água subterrânea. A taxa de dissolução em água da gasolina oxigenada, que é dependente das propriedades químicas dos compostos orgânicos, determinam o gr

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16

Nti-Gyabaah, Josep. "Solubility and activity coefficient of pharmaceutical compounds in liquid organic solvents." 2009. http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000051883.

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17

NEAU, STEVEN HENRY. "ON THE APPLICATION OF REGULAR SOLUTION THEORY TO THE ESTIMATION OF SOLUBILITY PARAMETERS OF CRYSTALLINE ORGANIC COMPOUNDS FROM SOLUBILITY DATA." 1988. http://catalog.hathitrust.org/api/volumes/oclc/68300101.html.

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18

PENG, JYUN-LUN, and 彭俊倫. "Sorption of organic compounds with different water solubility on modified-NaY zeolite using octadecyltrichlorosilane." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/12236716913217378982.

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碩士<br>中原大學<br>土木工程研究所<br>98<br>Abstract The objective of this study was to examine octadecyltrichlorosilane(OTS)-modified Na Y zeolite adsorbs organic compounds with different water solubility . The surface characteristics of modified-zeolites were analyzed based on the SEM, FTIR, BET area and element analyzer. The isotherms are applied to explain the mechanism between modified-zeolites and the test organic compounds. The potential sorption capacity was also evaluated in this study. Mixing OTS with 1.0 ml and 2.0 ml water adsorbed on the NaY zeolite can produce the modified Na Y zeolite posses

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19

Dalton, Sarah Kathryn. "Transport and lipid solubility of hydrophobic organic compounds using semipermeable membranes: Influence of dissolved organic matter and solution chemistry." Thesis, 2002. http://hdl.handle.net/1911/17497.

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Association of hydrophobic organic compounds with dissolved organic matter in natural water systems may impact a contaminant's ability to transport across synthetic membranes. Importantly, these interactions can create interferences when monitoring ambient levels of contaminants with a potential for biouptake. The influence of water-quality matrix conditions on the transport and lipid uptake of five hydrophobic organic compounds of environmental concern was investigated by partnering semipermeable membranes with a model lipid phase in a batch dialysis system. Contaminants fell into two charact

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20

Cordova, Isabella Weber. "Partition coefficients of phenolic compounds in biphasic organic solvent systems." Master's thesis, 2021. http://hdl.handle.net/10198/23860.

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Mestrado de dupla diplomação com a UTFPR - Universidade Tecnológica Federal do Paraná<br>First of all, I would like to express my sincere gratitude to the supervisors from IPB, professors Olga Ferreira and Simão Pinho, whose guidance, dedication and support has been so meaningful throughout this work. I also want to thank the professors Priscilla Leite and Juliana Pietrobelli for support and encouragement for participating in the Double Degree Program. I am very grateful for having provided me with this incredible experience. I would like to thank all my friends and colleagues that I made du

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21

Buckley-Smith, M. K. "The use of solubility parameters to select membrane materials for pervaporation of organic mixtures /." 2006. http://adt.waikato.ac.nz/public/adt-uow20061012.163211/index.html.

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