List of Articles Open Access Article Abstract Page Full-Text 1 - A Survey of Direct Methods for Solving Variational Problems Maryam Gholami Mohammad Norouzi Open Access Article Abstract Page Full-Text 2 - Application of Graph Theory: Relationship of Topological Indices with the Partition Coefficient (logP) of the Monocarboxylic Acids Fatemeh Shafiei Open Access Article Abstract Page Full-Text 3 - MP2 study on the variation of stacking interactions in aniline and some para substituted aniline systems Shruti Sharma Bipul Bezbaruah Open Access Article Abstract Page Full-Text 4 - Prediction of accurate pKa values of some α-substituted carboxylic acids with low cost of computational methods M. Abul Kashem Liton Sabrina Helen Mukta Das Dipa Islam M. Rabiul Karim Open Access Article Abstract Page Full-Text 5 - Theoretical Investigation of Hyper-coordinate Planar Si Clusters in [SiMnHn]q (M = Cu, Ni and n = 4, 5, 6) Maryam Ahangari-Givi Jamshid Najafpour Khadijeh Kalateh Open Access Article Abstract Page Full-Text 6 - Flame atomic absorption spectrometric determination of Cd(II), Zn(II) and Ag(I) in different matrixes after solid phase extraction on sodium dodecyl sulfate (SDS)-coated alumina as their 2,3 Di Hydro 2,3 para tolyl Qinazoline (1 H)- 4 one (DPTQO) Farveh Raoufi Saidah Bagheri Ebrahim Niknam Khodabakhsh Niknam Hamid Reza Farmani Open Access Article Abstract Page Full-Text 7 - Quantum-chemical modeling of the stacking mechanism for the 1H-4H proton transfer in pyridine derivatives. A DFT study Jumber Kereselidze Marine Kvaraia George Mikuchadze