Methanol extracts of stem, leaf, and seed obtained from Pistacia terebinthus which are rich in phenolic compounds were used for the first time to produce chitosan-based antioxidative and antimicrobial films. All the produced films were characterized by FT-IR, TGA, DSC, SEM, contact angle measurements, and UV-Vis spectroscopy and mechanically. As was expected, incorporation of the plant extracts into chitosan films enhanced the antioxidant and antimicrobial activities effectively. Also, the elasticity of chitosan-seed and chitosan-stem films was improved. The eco-friendly nature of the produced blend films was determined through soil and water degradation analyses. All these findings lead to the conclusion that the produced blend films with Pistacia terebinthus extracts can be applied as alternative food packaging material.

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We have performed a first principles study of structural, mechanical, electronic, and optical properties of orthorhombic Sb2S3 and Sb2Se3 compounds. The calculations have been carried out within the local density approximation using norm conserving pseudopotentials. The lattice parameters, bulk modulus, and its pressure derivatives of the these compounds have been obtained. The second-order elastic constants have been calculated, and the other related quantities such as the Young's modulus, shear modulus, Poisson's ratio, anisotropy factor, sound velocities and Debye temperature have also been estimated in the present work. The linear photon-energy dependent dielectric functions and some optical properties such as the energy-loss function, the effective number of valance electrons and the effective optical dielectric constant are calculated. Our structural estimation and some other results are in agreement with the available experimental and theoretical data.we submit our manuscript " First principles prediction of the elastic, electronic, and optical properties of Sb 2 S 3 and Sb 2 Se 3 compounds". This manuscript is original and has not been published elsewhere and their intent is to publish in the Solid State Sciences. Cover LetterDear Editor, Thank you for your useful comments and suggestions on the language and structure of our manuscript. We have modified the manuscript accordingly, and detailed corrections are listed below point by point: 1) Please improve the clarity of letters used in figures 1 and 4. the clarity of letters used in figures 1 and 4 have been improved.2. Graphical abstract should be provided with figure only; the use of text will be allowed only when there is no alternative.  Graphical abstract have been provided with figure only.3.The tel/fax numbers (with country and area code)of the corresponding author should be provided on the first page of the manuscript.  On the first page of the manuscript have been provided the tel/fax numbers of the corresponding author.4. Page should be numbered consecutively.  Page have been numbered. Responses to Technical Check Results *Graphical Abstract

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