From owner-chemistry-: at :-ccl.net Wed Dec 6 14:56:18 1995 Received: from bedrock.ccl.net for owner-chemistry&$at$&ccl.net by www.ccl.net (8.6.10/950822.1) id OAA27092; Wed, 6 Dec 1995 14:45:23 -0500 Received: from cbdcom.apgea.army.mil for grfamini -A_T- cbdcom.apgea.army.mil by bedrock.ccl.net (8.7.1/950822.1) id OAA06762; Wed, 6 Dec 1995 14:45:10 -0500 (EST) Received: by cbdcom.apgea.army.mil id aa02800; 6 Dec 95 14:42 EST Date: Wed, 6 Dec 95 14:24:40 EST From: George R Famini To: chemistry(+ at +)ccl.net Subject: COMP Program for New Orleans Organization: International Programs Office Priority: Normal Message-ID: <9512061424.aa00207:~at~:cbdcom.apgea.army.mil> Enclosed is the first draft of the final program for the Division of Computers in Chemistry for the New Orleans American Chemical Society meeting (end of March). The COMP program consists of 168 papers running from Sunday morning to Thursday afternoon, with double sessions the entire week and triple sessions Sunday and Monday. The final program will appear in C&E News in early to mid February. The enclosed version has not been "prettied up". It is replete with typos and glitches by the program program I use. I apologize for the former, complain to ACS on the latter... George Famini COMP Program Chair Division of Computers In Chemistry G. R. Famini, Program ChairpersonC. J. Cramer, Chairperson COSPONSORED SYMPOSIA:CINF: Neural Networks OTHER SYMPOSIA OF INTEREST: New Perspectives in Envionmental Chemistry ANAL Teaching Chemistry on the Web CHED AI Based Techniques for End Users CINF Computer Modelng of Polymerization Catalysts PMSE SOCIAL EVENTS: Social Hour Tues 700PM SUNDAYMORNING Section A ComputationalChemistry Assisted Drug Discovery J. Damewood, &litalOrganizer, Presiding&rital 9:00--1.Assessment of Structure Based Design. I. D. Kuntz 9:45--2.Moleculr and Brownian dynamics of proteins. J. A. McCammon 10:30--3.Designing nonpeptidal fibronogen receptor antagonists: theory in collaboration with experiment. A. M. Naylor-Olsen, M. E. Duggan, M. S. Egbertson, R. J. Gould, G. D. Hartman 11:15--4.Quantitative Structure activity relationships of acetlcholinesterase inhibitores ofr teh treatment of memory deficits n Alzheimer's disease: A comparative molecular field analysis (CoMFA) study. W. J. Welsh, W. Tong, E. R. Collantes, Y. Chen Section B MonteCarlo Methods in Chemistry B. L. Hammond, &litalOrganizer, Presiding&rital 8:50--IntroductoryRemarks 9:00--5.Monte Carlo methods for prediction of phase transitions in fluids. A. Panagiotopoulos 9:30--6.Monte Carlo quantum mechanical calculations of molecular thermodynamic functions. D. G. Truhlar, R. Q. Topper, J. Srinivasan, S. L. Mielke 10:00--7.A smart Monte Carlo technique for free energy simulations. Direct calculations of conformational free energies. H. Senderowitz, W. C. Still 10:30--8.Using Monte Carlo techniques to explore the space of constitutional isomers. J-L. M. Faulon 11:00--9.A method for free energy calculations using iterative techniques. S. M. Kumar, P. W. Payne, M. Vasquez 11:30--10.Complete search of conformational space for met-enkephalin with the multicanonical method. F. Eisenmenger, U. H. E. Hansmann SUNDAYAFTERNOON Section A ComputationalChemistry Assisted Drug Discovery J. Damewood, &litalPresiding&rital 1:30--11.The design and synthesis of non peptide peptidomimetic inhibitors of the HIV 1 protease. Evidence for improved transport. A. B. Smits 2:15--12.RAS farnesyltransferase inhibitors as a new class of antitumor agents: A chemical approach to controlling cell signaling. Y. Qian, A. Vogt, S. M. Sebti, A. D. Hamilton 3:00--13.Distorted peptides in bioactive structures. M. Goodman 3:45--14.The caveat vector approach for structure based disign and combinatorial chemistry. P. A. Bartlett, G. Lauri 4:30--15.Enlightened screening: a marriage of computer aided design with combinatorial libraries. M. Kahn Section B MonteCarlo Methods in Chemistry W. A. Lester, &litalPresiding&rital 1:30--IntroductoryRemarks 1:40--16.Recent Progress on QUantum Monte Carlo for Atoms and Molecules. W. A. Lester, R. N. Barnett, C. Greef, B. L. Hammond 2:10--17.QMC Calculation on some positron compounds. N. Jiang, D. M. Schrader 2:40--18.Quantum Monte Carlo Calculations for heavy elements. H-J. Flad, M. Dolg, A. Shulka 3:10--19.Recent Progress in QMC and VMC treatment of molecules. D. Bressanini, J. Reynolds 3:40--20.VQMC Studies of transition metal atoms. D. Young, J. F. Harrison 4:10--21.Quantum Monte Carlo for electronic structure of clusters and solids. L. Mitas, J. C. Grossman 4:40--22.QUantum Monte Carlo evaluation of chemical reaction rate coefficients. A. C. Gentile, D. A. Evensky, J. Chang, U. Schnupf, N. J. Brown, J. L. Durant, M. L. Koszykowski Section C Physical/ChemicalProperty Prediction L. A. Carreira, &litalOrganizer, Presiding&rital 1:30--IntroductoryRemarks 1:35--23.Modeling Solute-Solvent interactions: an overview. C. J. Cramer, D. G. Truhlar 2:20--24.Using Molecular Orbital based parameters to predict properties. G. R. Famini, A. H. Lowrey, L. Y. Wilson 3:05--Break 3:20--25.Investigation of solute/solvent characteristics that determine solubilities. P. Politzer, J. S. Murray 4:05--26.Direct ab initio methods for predicting gas phase chemical reaction rates. T. N. Truong MONDAYMORNING Section A ComputationalChemistry Assisted Drug Discovery J. Damewood, &litalPresiding&rital 8:30--27.Matrix metallopreateases as drub discovery targets: Insights from a structure based approach. M. F. Browner 9:15--28.Computational tools in structure based drug design. J. J. Wendoloski 10:00--29.Fitting inhibitores into the active site of a metalloprotease. Z. R. Wasserman 10:45--30.Computer asisted search for novel calcineurin inhibitors. A. Tempczyk, C. Kissinger, H. Parge, V. J. Kalish, E. Villafranca 11:30--31.A CoMFA Analysis of FXa inhibitors and subsequent comparison with protein structure for selectivity issues. R. J. Vaz, L. McLean, J. T. Pelton Section B MonteCarlo Methods in Chemistry D. M. Ferguson, &litalPresiding&rital 8:45--32.Application of simulated annealing - optimal histogram methods to the protein folding problem. D. M. Ferguson, D. G. Garret 9:15--33.Monte Carlomethods and protein folding. H. A. Scheraga 9:45--34.A method for the prediction of surface loops/turns and transglobular connections in small proteins. A. Kolinski, J. Skolnick, A. Godzik 10:15--35.Biased probability Monte Carlo as a powerful global energy optimization method for miomolecular structure prediction. R. A. Abagyan, M. M. Totrov 10:45--36.Configurational bias Monte Carlo algorithms for bioactive molecules. J. S. Bader, C. Liang, M. W. Deem 11:15--37.Simulation of peptides and proteins - the multicanonical approach. U. H. E. Hansmann, Y. Okamoto Section C Physical/ChemicalProperty Prediction G. R. Famini, &litalPresiding&rital 9:00--IntroductoryRemarks 9:05--38.The role of hydrogen bonding in solute/solvent interactions. R. W. Taft 9:50--39.SPARC solvation models for ions: estimation of pKa in the gas phase and non-aqueous solvents. S. H. Hilal, L. A. Carreira, S. W. Karickhoff 10:35--40.Studies of solution properties of organic compounds by quantitative structuer property relationships. P. C. Jurs, J. M. Sutter, H. L. Engelhardt 11:20--41.Deriving QSPR and QSAR from new autocorrelation descriptors. D. Domine, J. Devillers 11:50--Break MONDAYAFTERNOON Section A ComputationalChemistry Assisted Drug Discovery J. Damewood, &litalPresiding&rital 1:30--42.Degermining Receptor bound conformations of insect neuropeptides. V. A. Robets, R. J. Nachman 2:15--43.A systematic protocol for studying protein ligan interactions. J. Given, M. K. Gilson 3:00--44.CLEW: Use of a genetic algorithm to determine rules that simplify complex pharmacological data. A. L. Parrill, D. P. Dolata 3:45--45.Directed Diversity*- at -*: an operating system for combinatorial chemistry. D. K. Agrafiotis, E. P. Jaeger 4:30--46.Finding a needle in a haystack: Using topological similarity to identify biologically active leads. R. Druker, L. B. Pfahler, C. H. Reynolds Section B ExperimentalMethods for CHemical Models K. Rappaport, &litalPresiding&rital 2:00--IntroductoryRemarks 2:10--47.Resin Vehicle Characterization through statistically designed experiments. M. Altekar, A. N. Sacrlatti 2:45--48.Synthesis of starch acetate: statistically designed experiments to optimize the reaction conditions. B. I. Feuer, S. Lepeniotis 3:20--Break 3:35--49.Development of experimental designs for organic synthetic reactions. W. F. Stansbury 4:10--50.Combining expeimental design and nueral networks: an empirical chemcial process modeling program. A. J. Owens, M. T. Mocella Section C Physical/ChemicalProperty Prediction L. A. Carreira, &litalPresiding&rital 1:30--51.A general model of solute solvent interactions. R. S. Pearlman, K. M. Smith, J. L. Escobar, R. Balducci, F. Deanda 2:15--52.SAR prediction of Henry's law constant. J. C. Dearden 2:45--Break 3:00--53.Group contribution method for the calculation of solubility properties of molecules. G. Klopman 3:45--54.Origins of medium induced fluorine chemical shifts. E. Y. Lau, J. T. Gerig 4:15--55.A computational model to predict two photon absorption resonances. G. P. Das, A. T. Yeates, D. S. Dudis MONDAYEVENING Sci-Mix G. R. Famini, &litalOrganizer, Presiding&rital 8:00--11:00 56.-- Molecular electronic properties may predict antimalarial activity. A. K. Battacharjee, J. M. Karle 57.-- Calculation of Polarizabilities and hyperpolarizabilities for small carbon-sulfur diffuse systems. X. Duan, A. T. Yates, D. S. Dudis 58.-- Integration of 3D-QSAR and homology modeling in the study of catalytic mechanisms and substrate specificty. W. Zheng, A. Tropsha, C. L. Waller 59.-- Partition Coefficients and phase behavior for nonn-toxic ice inhibitors from quantum mechanical and molecular dynamics simulations. S. Trohalaki, R. Pachter 60.-- Using SAR and QSAR to model the activity and structure of the quinolone/DNA complex. B. Liorente, F. Leclerc 61.-- Predicting Toxicity of chemicals to luminescent bacteria (microtox test) from linear and nonlinear multivariate analysis. J. Devillers, S. bintein, D. Domine 62.-- The prediction of protein loop structure by conformational search. L. Shen, J. Novotny, M. Sippl, R. E. Bruccoleri 63.-- Ab initio calculation of vibtrational circular dichroism spectra using density functional theory. J. R. Cheeseman, M. J. Frisch, F. J. Devlin, P. J. Stephens 64.-- A united-residue potential for protein-structure simulations by analysis of protein crystal data and optimal z-score approach. U. O. G. Liwo, M. R. Pincus, R. J. Wawak, S. R. Rackovsky, S. Oldziej, H. A. Scheraga 65.-- Monte Carlo simulated annealing approach to regional protein folding and conformation. L. Carlacci, S. W. Englander 66.-- Semi-empirical non-linear optical properties: methods and applications. C. C. Clause 67.-- Modeling Heats of Sublimation and Heats of Formation of Polycyclic Hydrocarbons by Comparative Molecular Field Analysis (CoMFA). W. J. Welsh, W. Tong, E. R. Collantes 68.-- Quantitative structure retention relationships for polycyclic aromatic hydrocarbons from Comparative molecular field analysis (CoMFA). E. R. Collantes, W. J. Welsh, W. Tong TUESDAYMORNING Section A Computersin Chemistry Award Symposium Honoring Norman L. Allinger K. Lipkowitz, &litalOrganizer, Presiding&rital 8:45--WelcomingRemarks- C. Cramer 8:50--IntroductoryRemarks 9:00--69.MMFF94: The Merck molecular force field. Bridging the gap from small organics to proteins. T. A. Halgren, R. B. Nachbar 9:45--70.On the application of molecular mechnaics and dynamics to biological systems: one of Lou Allinger's legacies. P. A. Kollman 10:30--71.Modeling carbohydrates. A. F. French 11:15--72.Computers in Chemistry Award Address: Recent Work in Molecular Mechanics. N. L. Allinger Section B ExperimentalMethods for Chemical Models K. Rappaport, &litalPresiding&rital 9:00--IntroductoryRemarks 9:10--73.Statistical Methods for monomer selection in chemical library design. C. M. Cribbs, A. Menius, D. Cummins, S. S. Young 9:45--74.Real time multivariate process monitoring. D. E. Stevens, K. Giese 10:20--Break 10:35--75.Hybridizing linear and nonlinear multivariate analyses for optimal test series design. D. Domine, J. Devillers 11:10--76.Statistical model of systematic errors: an assessment of the Ba-Cu and Cu-Y phase diagram. E. B. Rudnyi TUESDAYAFTERNOON Section A ComputationalChemistry Assisted Drug Discovery W. J. Welsh, &litalPresiding&rital 1:30--77.Application of a novel conformatonal bias Monte Carlo method to explore the bioactive conformations of the arginine-glycine-aspartate recognition sequence. X. L. C. Liang, J. S. Bader, M. W. Deem, G. Went 2:15--78.Useof an intercommunicating hybrid system for designing chemical with desired properties. J. Devillers, C. Putavy, D. Domine 3:00--79.Theoretical determination of the solvation free energies of the nucleic acid bases in water and chloroform. J. E. Eksterowicz, J. L. Miller, P. A. Kollman 3:45--80.Les is more: Improved conformational sampling in molecular dynamics. C. Simmerling, P. A. Kollman 4:30--81.A novel approach to docking flexible molecules - the flash and churn system. M. C. Pitman, I. Rigatousos, D. E. Platt Section B MolecularModeling Applications to Environmental Problems J. Rabinowitz, &litalOrganizer, Presiding&rital 1:30--IntroductoryRemarks 1:45--82.Prediction of the oxidative metabolites by cytochrome P450's with quantum mechanics and molecular dynamics simulations. G. H. Loew, Y-T. Chang 2:15--83.Homology modeling of cytochrome P450 2E1 enzyme. W. Zhang, A. Tropsha, C. L. Waller 2:45--84.Predictive models for cytochrome P450 mediated reactions: a comparison of expeiment with theory. J. P. Jones, H. Yin, K. R. Korzekwa 3:15--85.Realistic simulations of charged macromolecules. L. G. Pedersen 3:45--Break 4:00--86.Including Solvent Effects in quantum chemistry. M. C. Zerner 4:30--87.Hydrophobic and hydrogen bonding effects on Diels-Alder reactions in aqueous solution. T. R. Furlani, J. Gao 5:00--88.Solvent effects on structure and vibrational spectra of bioloecules in aqueous solution. E. V. Stefanovich, T. N. Truong Section C FrugalChemist's Software C. James, &litalPresiding&rital 1:30--89.Macromodel: The computational chemists molecular modeling tool. C. A. Parish, W. C. Still 2:00--90.Desktop modeling of metal containing drugs. Platinum antitumor agents and gadolinium MRI contrast agents. E. W. Moody, T. R. Cundari 2:30--91. MOIL-View: A program for visualization of structure of biomolecules. C. Simmerling, P. A. Kollman 3:00--92.Dynamic display of structure and stereochemistry in the organic chemistry course. S. W. Slayden 3:30--93.Ab initio quality atomic charges and group electronegativity on a PC. J. Mullay 4:00--94.Ab initio molecular orbital calculations and Visualizations on a PC. J. B. Forseman 4:30--95.Computational chemistry and the nationall HPCC software exchange. J. C. Pool 5:00--96.Kinetic simulations on a budget. S. L. Cooke TUESDAYEVENING Section A PosterSession: General Poster Session G. R. Famini, &litalOrganizer, Presiding&rital 7:00--10:00 97.-- The electrostatic interactions that determine the rate of pseudorotation torcess in oxyphosphorane intermediates: implications with respect to the roles of metal ions in the enzymatic cleavage of RNA. T. Uchimaru, M. Uebayasi, T. Hirose, S. Txuzuki, A. Yliniemela, K. Tanabe, K. Taira 98.-- UV Photoelectron and ab initio quantum mechanical characterization of nucleotides: the valence electronic structures of 5'-dAMP(-).Na(+) and pGpA.2Na(+).4H2o clusters. P. R. LeBreton, H. S. Kim, Q. Jiang 99.-- Ab Initio Studies of Troposhperic Sulfur Chemistry. C. Wilson 100.-- Development of a proton NMR shielding model for the face of a phenyl ring. N. H. Martin, N. W. Allen 101.-- Simulation of internal rotation potential energy curve for serine. K. Zhang, A. Chung-Phillips 56.-- Molecular electronic properties may predict antimalarial activity. A. K. Battacharjee, J. M. Karle 102.-- Modulating force constants of nanosprings. M. Jalaie, K. Lipkowitz 57.-- Calculation of Polarizabilities and hyperpolarizabilities for small carbon-sulfur diffuse systems. X. Duan, A. T. Yates, D. S. Dudis 58.-- Integration of 3D-QSAR and homology modeling in the study of catalytic mechanisms and substrate specificty. W. Zheng, A. Tropsha, C. L. Waller 103.-- Prediction of aromatic amine carcinogenicity: QSAR calculated lowest unoccupied molecular orbital energy of hypothetical nitrenium ion intermediate. R. Purdy 59.-- Partition Coefficients and phase behavior for nonn-toxic ice inhibitors from quantum mechanical and molecular dynamics simulations. S. Trohalaki, R. Pachter 60.-- Using SAR and QSAR to model the activity and structure of the quinolone/DNA complex. B. Liorente, F. Leclerc 104.-- Single atom doping of clusters. L. S. Perkins 105.-- Ab initio studies of oximide. J. L. Meeks 61.-- Predicting Toxicity of chemicals to luminescent bacteria (microtox test) from linear and nonlinear multivariate analysis. J. Devillers, S. bintein, D. Domine 106.-- An ab initio study of the model thio-wittig reaction PH3CH2 + CH2S => PH3S + C2H5. S. M. Bachrach, L. M. Perriott 107.-- The heuristic potency of art networks for QSAR dat visualization and interpretation. D. Domine, J. Devillers, D. Wienke, L. Buydens 108.-- Application of evolutionary algortihms and a topological index based fitting function in the design of combinatorial chemical libraries. S. J. Cho, W. Zheng, A. Tropsha 109.-- Application of Cluster analysis and monte carlo methods in the design of combinatorial chemcial libraries. W. Zheng, S. J. Cho, A. Tropsha 62.-- The prediction of protein loop structure by conformational search. L. Shen, J. Novotny, M. Sippl, R. E. Bruccoleri 110.-- Molecular dynamics (MD) simulations of transmembrane a-helices in a lipid bilayer: tryptophan effect. L. Shen, D. Bassolino, T. R. Stouch 63.-- Ab initio calculation of vibtrational circular dichroism spectra using density functional theory. J. R. Cheeseman, M. J. Frisch, F. J. Devlin, P. J. Stephens 64.-- A united-residue potential for protein-structure simulations by analysis of protein crystal data and optimal z-score approach. U. O. G. Liwo, M. R. Pincus, R. J. Wawak, S. R. Rackovsky, S. Oldziej, H. A. Scheraga 65.-- Monte Carlo simulated annealing approach to regional protein folding and conformation. L. Carlacci, S. W. Englander 66.-- Semi-empirical non-linear optical properties: methods and applications. C. C. Clause 111.-- Study of trichloromethyl radical proton abstraction reaction with ab initio and density functional theory methods. B. S. Jursic 112.-- Theoretical study of borane catalyzed azide anion addition to fluroinated acetonitriles. B. S. Jursic, Z. Zdravkovski 113.-- Estimation of five membered and benzo fused five membered rings by hybrid DFT computed magnetic properties. B. S. Jursic 114.-- AM1 study of benzo[c]furan as a dienophile for Diels-Alders reactions. B. S. Jursic 115.-- Density functional theory study of ethylene and acetylene addition to oxazole protonated oxazole. B. S. Jursic 116.-- Density functional study of N-methylpyrrole transformation into N-methylisoindole through cycloaddition-extruson reactions. B. S. Jursic 117.-- Theoretical study of thieno[3,4-d]thiepin and furo[2,4-d]thiepin as dienes in the Diels-Alder reaction. B. S. Jursic 118.-- Average deviation from ideal bond order as a measure for aromaticity. AM1 computed aromatic properties of five membered C4H4X ring systems. B. S. Jursic 119.-- Computation of bond dissociation energies of methyl substituted radicals with density functioal theory methods. B. S. Jursic, J. W. Timberlake, P. S. Engel 120.-- Monte Carlo studies of the ice binding mechanism of the winter-flounder antifreeze proteing (AFP). W. J. Welsh, &lboldW. Tong, R. A. Duta, M. Fagan 67.-- Modeling Heats of Sublimation and Heats of Formation of Polycyclic Hydrocarbons by Comparative Molecular Field Analysis (CoMFA). W. J. Welsh, W. Tong, E. R. Collantes 68.-- Quantitative structure retention relationships for polycyclic aromatic hydrocarbons from Comparative molecular field analysis (CoMFA). E. R. Collantes, W. J. Welsh, W. Tong WEDNESDAYMORNING Section A Semi-EmpiricalMethods: Is There a Future? A. Holder, &litalOrganizer, Presiding&rital 8:30--IntroductoryRemarks 8:35--121. A future for semi-empirical MO? Heck YES! R. S. Pearlman, K. M. Smith 9:05--122. Using semi-empirical molecular orbital methods in linear free energy relationships. G. R. Famini, L. Y. Wilson 9:35--123. Semi-empirical MO methods: the middle ground in molecular modeling. C. H. Reynolds 10:05--124. Simulations of substrate-enzyme reactions using AM1 reaction coordinate calculations. Y. Lin, G. Duncan, R. King, W. J. Welsh 10:35--Break 10:45--125. The role of semiempirical molecular orbital methods within Dupont. K. D. Dobbs 11:15--126. Quantum Mechanical calculations of partial charges in solution, free energies of solvation, and partition coefficients. D. J. Giesen, C. C. Chambers, Z. Gu, G. D. Hawkins, C. J. Cramer, &lboldD. G. Truhlar 11:45--127. On the rhodanines. D. B. Boyd, R. J. Loncharich, J. S. Nissen Section B MolecularModeling Applications to Environmental Problems W. C. Herndon, &litalPresiding&rital 8:30--128. Molecular surface properties as a tool for investigating and predicting molecular interactions. P. Politzer, J. S. Murray 9:00--129. Ab initio calculation of stabilities and infrared spectra of molecules and ions. D. H. Aue 9:30--130. The effect of crowding in the Bay/Fjord region on the structure and reactivities of diol-epoxides of polycyclic aromatic hydrocarbons. J. Rabinowitz, S. B. Little, L. L. Lewis-Bevan 10:00--131. Computing structures of DNA damaged by environmental polycyclic aromatic carcinogens. B. E. Hingerty, S. Boyde 10:30--Break 10:45--132. Catalytic DNA: theory and computations. G. R. Pack, G. Lamm 11:15--133. Ab initio quantum mechanical and UV photoelectron evaluation of nucleotide ionization potentials in water, counterion enviroments: pi polarization effecs on DNA alkylation by carcinogenic methylating agents. P. R. LeBreton 11:45--134. Energy surfaces on the ethenyl radical. M. Krauss WEDNESDAYAFTERNOON Section A Semi-EmpiricalMethods: Is There a Future? A. Holder, &litalPresiding&rital 1:30--IntroductoryRemarks 1:35--135. Calculating the electronic spectra of large molecular systems. M. C. Zerner 2:05--136. NDDO semi-empirical approximation coupled with Green's function technique. D. Danovich 2:35--137. Semi-empirical molecular orbital theory in carcinogenesis. G. P. Ford 3:05--Break 3:20--138. Solvation effects on organic structure and reactivity - semi-empirical calculations with the SMx solvation models. S. E. Barrows, C. C. Chambers, D. J. Giesen, C. J. Cramer, D. G. Truhlar 3:50--139. The future of molecular modeling: competitive with experiment? D. S. Dudis, A. T. Yeates 4:20--140. Semi-empirical calculation of the electronic structure of proteins. J. J. P. Stewart Section B MolecularModeling Applications to Environmental Problems G. R. Pack, &litalPresiding&rital 1:30--141. Structures and enthalpies of fluorohydrocarbons. W. C. Herndon 2:00--142. Modeling the cytochrome P450 mediated metabolism of chlorinated volatile organic compounds. C. L. Waller, M. V. Evans, J. D. McKinney 2:30--143. Computationally identified reactive intermediates of S-(2,2-dihalo-1,1-difluoroethyl)-L-cysteine conjugates. J-Y. Shim, A. M. Richard 3:00--144. A model for predicting estrogenic activity. R. Purdy 3:30--Break 3:45--145. Ab initio model of slicylate adsorbed onto AL2O3 and illite clay. J. D. Kubicki, M. J. Itoh, S. E. Apitz 4:15--146. Modeling biodegradation from multivariate statsitical tools. J. Devillers 4:45--147. A knowledge rule based expert system for assessing carcinogenic potential of chemcials. Y-T. Woo, D. Y. Lai, J. C. Arcos, M. F. Argus THURSDAYMORNING Section A Semi-EmpiricalMethods: Is There a Future? A. J. Holder, &litalPresiding&rital 8:30--IntroductoryRemarks 8:35--148. Use of semi-empirical methods to predict the pKa's of phenols and anilines: structures, statistics and solvation. Y. C. Martin, J. Wu, J. F. Curley, K. H. Kim 9:05--149. Semi-empirical calculations of O-H N-H and C-H hydrogen bonding interactions. A comparison with high quality ab initio calculations. J. J. Dannenberg 9:35--150. Theory and experiment in the study of intramolecular O-H''''Pi hydrogen bonding. E. F. Healy, J. D. Lewis 10:05--151. Visualization techniques for locating transition states using semiempirical methods. G. D. Purvis III 10:35--Break 10:50--152. Recent numerical improvements in semi-empirical methods. D. A. Liotard 11:20--153. Use of semi-emipirical quantum chemical molecualr descriptors in QSAR/QSPR. M. Karelson 11:50--154. The use of semi-empirical QM methods in expert systems. G. Klopman Section B GeneralOral G. R. Famini, &litalOrganizer&rital D. Cronce, &litalPresiding&rital 9:00--155. Studies on the P-N bond. W. E. White 9:30--156. Variable Selection of topological indices for QSAR using genetic algorithms. S. J. Cho, W. Andrews, A. Tropsha 10:00--157. A theoretical of CO and NO interaction with Cu sites in ZSM-5: Electronic structure and vibrational spectra. R. Ramprasad, K. C. Haas, W. F. Schneider, J. B. Adams 10:30--158. The estimation/prediction of some properties of explosive's stability with the QSPR approach. S. Peshkova, M. Kumskov THURSDAYAFTERNOON Section A Semi-EmpiricalMethods: Is There a Future? A. J. Holder, &litalPresiding&rital 2:00--IntroductoryRemarks 2:15--159. Computational enzymology: chemically accurate models for molecular recognition and catalysis. P. A. Bash 2:35--160. Electron correlation in small clusters: full CI for model hamiltonians. A. E. Roos, J. A. Pople, M. A. Ratner 2:55--161. The applicability of semi-empirical methods towards the calculations of non-linear optical properties. W. A. Parkinson 3:15--162. Semi-empirical study of small water clusters: low energy fused cubic structures for (H2O)n, n=8,12,16. P. L. M. Plummer 3:35--Break 3:50--163. AM1 studies of the reaction mechnaism for alkyl transfer from boron to zinc. D. A. Smith, C. W. Ulmer, S. Darling 4:10--164. The ab initio basis of pi electron theory: highly accurate pi hamiltonians for protonated schiff bases. C. H. Martin 4:30--165. Semi-empirical vs. density functional or ab initio QM/MM methods. P. Lyne, M. Karplus Section B GeneralOral W. E. White, &litalPresiding&rital 2:00--166. Small Angle XRay scattering from oriented single particle systems. B. P. Grady, B. C. McAlister 2:30--167. Ammonium ion interactions in receptor modeling. P-O. Norrby, T. Liljefors 3:00--168. About the aromaticity of dehydro[8]annulenes. A theoretical study. R. Salcedo, L. E. Sansores