Investigation of the molecular force field with the help of parameter representation of force constants

1969 ◽  
Vol 3 (1-2) ◽  
pp. 1-9 ◽  
Author(s):  
F. To¨ro¨k ◽  
P. Pulay
1972 ◽  
Vol 27 (4) ◽  
pp. 700-701 ◽  
Author(s):  
M.N. Avasthi ◽  
M.L. Mehta

Abstract Molecular force field studies of tungsten and uranium hexa-chloride have been carried out using the Urey-Bradley force field (UBFF) and the orbital valence force field (OVFF). Weighted least square adjustment has been used to fit the observed frequencies. Comments are also made on the suit-ability of the force fields used. The trends in stretching force constants have been discussed.


1991 ◽  
Vol 02 (01) ◽  
pp. 505-509 ◽  
Author(s):  
T. SUNDIUS

A program for molecular force field calculations (MOLVIB) has been implemented on a CRAY X-MP computer, in order to test its performance for large molecules. Convergence tests were also performed with large sets of molecules to study how variations in the initial force constants affect the final force field.


1976 ◽  
Vol 73 ◽  
pp. 1051-1057
Author(s):  
Sadao Isotani ◽  
Alain J.-P. Alix

1974 ◽  
Vol 53 (1) ◽  
pp. 62-76 ◽  
Author(s):  
Robert L. Cook ◽  
Frank C. De Lucia ◽  
Paul Helminger

ALCHEMY ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 33-40
Author(s):  
Atika Umi Hanif ◽  
Prima Agusti Lukis ◽  
Arif Fadlan

 In silico technique is widely used for drug discovery because it can predict the conformation of ligands in protein macromolecules and it can calculate the binding affinity. The energy minimization is carried out to make the ligand more stable near the initial state during molecular docking process. The Merck Molecular Force Field (MMFF94) is one type of energy minimization process often used in organic compounds. The molecular docking of substituted oxindole derivatives on indoleamine macromolecules 2,3-dioxygenase (IDO-1, PDB: 2D0T) by MMFF94 minimization operated by MarvinSketch and Open Babel in PyRx showed different results. The binding affinity energy obtained was also quite different, but the ligands have the same conformation and bind the same residue with slightly different bond distances. Keywords: Molecular docking, energy minimization, substituted oxindole, Merck Molecular Force Field 94  Teknik in silico banyak digunakan untuk penemuan senyawa obat karena dapat memprediksi konformasi suatu ligan dalam makromolekul protein dan mampu menghitung nilai afinitas ikatan. Proses minimisasi energi dilakukan untuk menjadikan ligan lebih stabil mendekati keadaan awal selama penambatan molekular berlangsung. Merck Molecular Force Field (MMFF94) adalah salah satu jenis persamaan minimisasi energi yang sering digunakan pada senyawa organik. Hasil pengujian pengaruh minimisasi energi dengan MMFF94 menggunakan program MarvinSketch dan Open Babel dalam PyRx pada turunan oksindola tersubstitusi alkil terhadap makromolekul 2,3-dioxygenase indoleamine (IDO-1, PDB: 2D0T) menunjukkan hasil dengan nilai yang berbeda. Energi afinitas ikatan yang didapatkan juga cukup berbeda, namun ligan memiliki konformasi yang sama dan mengikat residu yang sama dengan jarak ikatan yang sedikit berbeda. Kata kunci: Penambatan molekular, minimisasi energi, oksindola tersubstitusi, Merck Molecular Force Field 94


1993 ◽  
Vol 26 (8) ◽  
pp. 1497-1510 ◽  
Author(s):  
Y. Hase ◽  
R. Forneris ◽  
S. C. da Silva

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