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Addington CK, Phillips KA, Isaacs KK. Estimation of the Emission Characteristics of SVOCs from Household Articles Using Group Contribution Methods. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:110-119. [PMID: 31822065 PMCID: PMC7346891 DOI: 10.1021/acs.est.9b06118] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The risk to humans from chemicals in consumer products is a function of both hazard and exposure. There is an ongoing effort to quantify chemical exposure due to household articles such as furniture and building materials. Polymers and plastic materials make up a substantial portion of these articles, which may contain chemical additives such as plasticizers. When these additives are not bound to the polymer matrix, they are free to diffuse throughout it and leach or emit from the surface. We have implemented a methodology to predict plasticizer emission from polyvinyl chloride (PVC) products, based on group contribution methods that consider a free volume effect to estimate activity coefficients for chemicals in polymer-solvent solutions. Using the estimated activity coefficients, we calculate steady-state gas phase concentrations for plasticizers in equilibrium with the polymer surface (y0). The method uses only the structure of the chemical and polymer, the weight fraction, and physical-chemical properties, allowing rapid estimation of y0 at different weight fractions in PVC. Using the predicted y0 values and weight fraction data gleaned from public databases, we estimate plasticizer exposures associated with 72 PVC-containing articles using a high-throughput model. We also investigate potential exposures associated with plasticizer substitutions in these products.
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Affiliation(s)
- Cody K. Addington
- Oak Ridge Institute for Science and Education (ORISE), Oak Ridge, Tennessee 37830, United States
- U.S. Environmental Protection Agency, Office of Research and Development, National Exposure Research Laboratory, 109 T.W. Alexander Drive, Research Triangle Park, North Carolina 27709, United States
| | - Katherine A. Phillips
- U.S. Environmental Protection Agency, Office of Research and Development, National Exposure Research Laboratory, 109 T.W. Alexander Drive, Research Triangle Park, North Carolina 27709, United States
| | - Kristin K. Isaacs
- U.S. Environmental Protection Agency, Office of Research and Development, National Exposure Research Laboratory, 109 T.W. Alexander Drive, Research Triangle Park, North Carolina 27709, United States
- Corresponding Author: 109 T.W Alexander Dr., NC 27711, USA, , Phone: (919) 541-2785
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Shirmohammadi M, Mohammadinasab E, Bayat Z. Prediction of Lipophilicity of some Quinolone Derivatives by using Quantitative Structure-Activity Relationship. Curr Drug Discov Technol 2019; 18:83-94. [PMID: 31701848 DOI: 10.2174/1570163816666191108145026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 07/24/2019] [Accepted: 09/27/2019] [Indexed: 11/22/2022]
Abstract
OBJECTIVES Quantitative structure activity relationship (QSAR) was used to study the partition coefficient of some quinolones and their derivatives. METHODS These molecules are broad-spectrum antibiotic pharmaceutics. First, data were divided into two categories of train and test (validation) sets using a random selection method. Second, three approaches, including stepwise selection (STS) (forward), genetic algorithm (GA), and simulated annealing (SA) were used to select the descriptors, to examine the effect feature selection methods. To find the relation between descriptors and partition coefficient, multiple linear regression (MLR), principal component regression (PCR) and partial least squares (PLS) were used. RESULTS QSAR study showed that both regression and descriptor selection methods have a vital role in the results. Different statistical metrics showed that the MLR-SA approach with (r2=0.96, q2=0.91, pred_r2=0.95) gives the best outcome. CONCLUSION The proposed expression by the MLR-SA approach can be used in the better design of novel quinolones and their derivatives.
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Affiliation(s)
| | | | - Zakiyeh Bayat
- Department of Chemistry, Quchan Branch, Islamic Azad University, Quchan, Iran
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Müller S. Flexible heuristic algorithm for automatic molecule fragmentation: application to the UNIFAC group contribution model. J Cheminform 2019; 11:57. [PMID: 33430960 PMCID: PMC6701077 DOI: 10.1186/s13321-019-0382-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Accepted: 08/12/2019] [Indexed: 11/10/2022] Open
Abstract
A priori calculation of thermophysical properties and predictive thermodynamic models can be very helpful for developing new industrial processes. Group contribution methods link the target property to contributions based on chemical groups or other molecular subunits of a given molecule. However, the fragmentation of the molecule into its subunits is usually done manually impeding the fast testing and development of new group contribution methods based on large databases of molecules. The aim of this work is to develop strategies to overcome the challenges that arise when attempting to fragment molecules automatically while keeping the definition of the groups as simple as possible. Furthermore, these strategies are implemented in two fragmentation algorithms. The first algorithm finds only one solution while the second algorithm finds all possible fragmentations. Both algorithms are tested to fragment a database of 20,000+ molecules for use with the group contribution model Universal Quasichemical Functional Group Activity Coefficients (UNIFAC). Comparison of the results with a reference database shows that both algorithms are capable of successfully fragmenting all the molecules automatically. Furthermore, when applying them on a larger database it is shown, that the newly developed algorithms are capable of fragmenting structures previously thought not possible to fragment.
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Affiliation(s)
- Simon Müller
- Institute of Thermal Separation Processes, Hamburg University of Technology, Eißendorfer Straße 38, 21073, Hamburg, Germany.
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Nieto-Draghi C, Fayet G, Creton B, Rozanska X, Rotureau P, de Hemptinne JC, Ungerer P, Rousseau B, Adamo C. A General Guidebook for the Theoretical Prediction of Physicochemical Properties of Chemicals for Regulatory Purposes. Chem Rev 2015; 115:13093-164. [PMID: 26624238 DOI: 10.1021/acs.chemrev.5b00215] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Carlos Nieto-Draghi
- IFP Energies nouvelles , 1 et 4 avenue de Bois-Préau, 92852 Rueil-Malmaison, France
| | - Guillaume Fayet
- INERIS, Parc Technologique Alata, BP2 , 60550 Verneuil-en-Halatte, France
| | - Benoit Creton
- IFP Energies nouvelles , 1 et 4 avenue de Bois-Préau, 92852 Rueil-Malmaison, France
| | - Xavier Rozanska
- Materials Design S.A.R.L. , 18, rue de Saisset, 92120 Montrouge, France
| | - Patricia Rotureau
- INERIS, Parc Technologique Alata, BP2 , 60550 Verneuil-en-Halatte, France
| | | | - Philippe Ungerer
- Materials Design S.A.R.L. , 18, rue de Saisset, 92120 Montrouge, France
| | - Bernard Rousseau
- Laboratoire de Chimie-Physique, Université Paris Sud , UMR 8000 CNRS, Bât. 349, 91405 Orsay Cedex, France
| | - Carlo Adamo
- Institut de Recherche Chimie Paris, PSL Research University, CNRS, Chimie Paristech , 11 rue P. et M. Curie, F-75005 Paris, France.,Institut Universitaire de France , 103 Boulevard Saint Michel, F-75005 Paris, France
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Nasrifar K, Moshfeghian M. Vapor–Liquid Equilibria of Binary Associating Fluids Using a Cubic Equation of State with Limited Data. Ind Eng Chem Res 2014. [DOI: 10.1021/ie403560z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Khashayar Nasrifar
- Department
of Chemical and Petrochemical Engineering, University of Nizwa, Nizwa PC 616, Oman
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Harini M, Adhikari J, Rani KY. A Review on Property Estimation Methods and Computational Schemes for Rational Solvent Design: A Focus on Pharmaceuticals. Ind Eng Chem Res 2013. [DOI: 10.1021/ie301329y] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- M. Harini
- Department of Chemical
Engineering, Indian Institute of Technology, Bombay, Mumbai-400076, India
| | - Jhumpa Adhikari
- Department of Chemical
Engineering, Indian Institute of Technology, Bombay, Mumbai-400076, India
| | - K. Yamuna Rani
- Chemical Engineering Division, Indian Institute of Chemical Technology, Hyderabad-500607,
India
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Rodríguez O, Teixeira MA, Rodrigues AE. Prediction of odour detection thresholds using partition coefficients. FLAVOUR FRAG J 2011. [DOI: 10.1002/ffj.2076] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Oscar Rodríguez
- LSRE - Laboratory of Separation and Reaction Engineering; Associate Laboratory LSRE/LCM; Dept. of Chemical Engineering; Faculty of Engineering of University of Porto; Rua Dr. Roberto Frias; 4200-465; Porto; Portugal
| | - Miguel A Teixeira
- LSRE - Laboratory of Separation and Reaction Engineering; Associate Laboratory LSRE/LCM; Dept. of Chemical Engineering; Faculty of Engineering of University of Porto; Rua Dr. Roberto Frias; 4200-465; Porto; Portugal
| | - Alírio E Rodrigues
- LSRE - Laboratory of Separation and Reaction Engineering; Associate Laboratory LSRE/LCM; Dept. of Chemical Engineering; Faculty of Engineering of University of Porto; Rua Dr. Roberto Frias; 4200-465; Porto; Portugal
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Cheng H, Kontogeorgis GM, Stenby EH. Correlation and Prediction of Environmental Properties of Alcohol Ethoxylate Surfactants Using the UNIFAC Method. Ind Eng Chem Res 2005. [DOI: 10.1021/ie050096b] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hongyuan Cheng
- Centre for Phase Equilibria and Separation Processes (IVC−SEP), Department of Chemical Engineering, Building 229, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Georgios M. Kontogeorgis
- Centre for Phase Equilibria and Separation Processes (IVC−SEP), Department of Chemical Engineering, Building 229, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Erling H. Stenby
- Centre for Phase Equilibria and Separation Processes (IVC−SEP), Department of Chemical Engineering, Building 229, Technical University of Denmark, DK-2800 Lyngby, Denmark
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Zhao YH, Abraham MH. Octanol/Water Partition of Ionic Species, Including 544 Cations. J Org Chem 2005; 70:2633-40. [PMID: 15787554 DOI: 10.1021/jo048078b] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[structure: see text] Partition coefficients of single ions in the octanol/water system (log P(oct)) have been assigned on the (Ph4As+, Ph4P+) = Ph4B- assumption. The log P(oct) values of Cl-, Br-, and I- ions are then used to obtain the partition coefficients of cations from partition coefficients of the neutral combination of anion and cation. Partition coefficients of 544 cations derived from 585 organic salts from the MedChem database have been studied. The contributions of the aliphatic charge N+ and aromatic charge n+ in these cations have been investigated. The results show that the contributions of N+ and n+ in different homologous series are affected by the attached functional groups and are not constant, although the effect of the central cation is constant along any given homologous series. The latter can be accounted for qualitatively and semiquantitatively by the electrostatic theory of ionic solvation of Abraham and Liszi. A number of regression equations have been established between partition coefficients of ions and partition coefficients of the corresponding neutral species. These equations can be used to estimate octanol/water partition coefficients for additional cations to about 0.5 log unit.
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Affiliation(s)
- Yuan H Zhao
- Department of Chemistry, University College London, 20 Gordon St., London WC1H 0AJ, UK
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Abildskov J, O'Connell JP. Predicting the Solubilities of Complex Chemicals I. Solutes in Different Solvents. Ind Eng Chem Res 2003. [DOI: 10.1021/ie030210v] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jens Abildskov
- Computer-Aided Process Engineering Center, Department of Chemical Engineering, Building 229, Technical University of Denmark, 2800 Lyngby, Denmark, and Department of Chemical Engineering, University of Virginia, Charlottesville, Virginia 22904
| | - John P. O'Connell
- Computer-Aided Process Engineering Center, Department of Chemical Engineering, Building 229, Technical University of Denmark, 2800 Lyngby, Denmark, and Department of Chemical Engineering, University of Virginia, Charlottesville, Virginia 22904
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