In order to lower brittleness of biobased polylactic acid (PLA), its blending with polycarbonate and nanosilica is aimed. In this line, to increase compatibility of the ingredients, dicumyl peroxide (DCP) and Cobalt (II) acetylacetonate (Co) were used as grafting and transesterification catalysts, respectively. The X-ray diffraction (XRD) spectra demonstrated high compatibility of the ingredients by broadening of the PLA characteristic peaks and, also, good dispersion of nanosilica particles, especially in PLA/PC/Silica/Co sample. The EDX maps confirmed good nanosilica dispersion, too. The silica nanoparticle size was ranged from 20 to 100 nm in transmission electron microscopy (TEM) pictures. All nanocomposites showed improved thermal stability in thermogravimetric analysis (TGA). Differential scanning calorimetry (DSC) results demonstrated lower T g , T m , and crystallinity values for the fabricated nanocomposites. Notably, the dynamic mechanical thermal analysis (DMTA) curves confirmed the T g , T m , and T cc trend obtained in DSC; moreover, much higher surface under tan δ peak for PLA/PC/Silica/Co sample was obtained, which implies its higher toughness. The precise tensile study of the samples confirmed significantly higher elongation at break of the nanocomposites, more considerably in PLA/PC/Silica/Co sample, with nearly negligible defect on tensile strength and modulus. In a concise, the obtained results confirmed the higher efficiency of Co catalyst, which leads to the sample with improved characteristics compared with DCP.

Background and Objectives: Nowadays health-oriented lifestyle is the best way for prevention and having a healthy lifearound the world. Therefore it is necessary to identify and strengthen the factors that improve lifestyle. As a result, this study aimed to evaluate the effect of Islamic instructional-based spiritual-religious psychotherapy on health-oriented lifestyle in female students of

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With aim of determining relationships among variables of educational leadership, characteristics of teachers and organizational health, this research has been carried out. Research methodology is of correlation type. Statistical universe consisted of the entire elementary schools in western part of Mazandaran province, numbering 347 schools out of which 200 schools were selected as sample volume. Also, sampling method was conducted by random stratified method. The main tool of data collection in this research was 3 questionnaires of educational leadership, characteristics of teachers and organizational health of Hoy et al, respectively. Questionnaire of organizational health has been stand,ard and of validity. Validity of made-by-researcher questionnaires of educational leader and characteristics of teachers was investigated through facial and structural validity. In order to calculate reliability, Cronbach alpha method was used, and questionnaires of educational leadership, characteristic of teachers and organizational health were computed to be 0.953 and 974, respectively. Causal relationships among the variables were tested through structural modeling and using the Lisrel 8.54 software. The obtained findings showed that characteristics of teachers have a positive and significant influence on the organizational health. Meanwhile, characteristics of teachers play a mediatory role in the effectiveness of educational leadership on the organizational health.