Like-charge ion pairing is commonly observed in protein structures and plays a significant role in biochemical processes. Density functional calculations combined with the conductor-like polarizable continuum model were employed to study the formation possibilities of doubly charged noncovalently linked complexes of a series of model compounds and amino acids in the gas phase and in solution. Hydrogen bond interactions were found to offset the Coulombic repulsion such that cation-cation clusters are minima on the potential energy surfaces and neither counterions nor solvent molecules are needed to hold them together. In the gas phase the dissociation energies are exothermic, and the separation barriers span from 1.7 to 15.6 kcal mol(-1). Liquid-phase computations indicate that the separation enthalpies of the cation-cation complexes become endothermic in water and nonpolar solvents with dielectric constants of ≥7 (i.e., the value for THF). These results reveal that electrostatically defying noncovalent complexes of like-charged ions can overcome their Coulombic repulsion even in low-polarity environments.

Background: Intelligence is one of the categories that has long been considered by human beings and is one of the most important factors that lead to individual differences. One of the differences between individuals that leads to the emergence of unique characteristics in them. The research was to find relationship between intelligence (logic-mathematics) and media literacy among high school females. Materials and Methods: In terms of objective, this research is an applied one and, in terms of method, it is a correlation research. So 357 female students at seventh grade at high schools in Tehran's district 4 education organization were selected by Morgan table among 4959 by cluster randomly sampling method. The research tools involved Gardner's Multiple Intelligences with a reliability value of 0.92, media literacy questionnaire (Hasankhani, 2018) with a reliability value of 0.86. Results: The relationship between intelligence (logic-mathematics) and media literacy was analyzed using Pearson correlation coefficient by SPSS21. It was revealed that the positive and significant relationship between intelligence (logic-mathematics) and media literacy among high school females. Conclusion: Possessing media literacy and mastering various softwares, especially in the field of methodology and statistics, will play an important role in shaping the structure of knowledge in individuals. Keywords: logic-mathematics Intelligences, Media literacy

The aim of this study was to investigate the relationship between the aesthetic dimension of media literacy and the academic performance of women in the 12th district of Tehran in 2018-2018. The statistical population in this study is 80 women interested in education and 66 people were selected as a sample using Morgan table. In fact, the whole statistical population was determined as a sample. The research tools are two questionnaires: media literacy and academic performance. Hassan Khani Media Literacy Questionnaire (2018) with 90% reliability and Pham and Taylor (1999) Academic Performance Questionnaire with 84% reliability were used. Data were analyzed using Pearson correlation coefficient and multivariate regression. The results showed that there is a significant relationship between academic performance and aesthetic components of media literacy. Keywords: media literacy, academic performance, aesthetics