The purpose of this study was to design educational content of Green Chemistry Metrics for undergraduate chemistry students. Based on the purpose of the research, it was an applied-development type, and in terms of collecting and analyzing the data; a descriptive-analytical type is used. The statistical sample was a collection of books, articles, journals, and dissertations related to green chemistry which were selected and analyzed up to getting theoretical saturation. By reviewing related literature and investigating various sources on how to design the educational contents of the chemistry green, and also by directions of the field experts, during several revers phases of core coding, chapters were determined, then, according to the designated chapters, objectives were written for each topic in the target-content table. The results of this study showed that for the design of the content of training green chemistry measurements, two categories of mass measurements and environmental measurements can often be quantitatively evaluated in the twelve principles of green chemistry. In these two categories, there are various methods for assessing the greenness of a reaction (organic reaction synthesis) were identified, including atomic economy, reaction mass efficiency, material recovery parameter, environmental factor, process mass intensity, and effective mass efficiency are presented in a conceptual framework.

In Islamic traditional textbooks modal operators sometimes come before propositions, sometimes before the predicates and sometimes at the end of propositions. This makes the interpretation of modality in each case as de re or de dicto difficult. Given Ibn SVnÏ's discussion of and sensitivity to this distinction, in this paper by examining the position of modality in the contradictories and converses of modal categorical propositions as well as their positions in modal syllogisms I will try to find a reasonable answer to this important issue.

In this paper, we study generalized Douglas-Weyl Finsler metrics. We find some conditions under which the class of generalized Douglas-Weyl (a, b)-metric with vanishing S-curvature reduce to the class of Berwald metrics.

The symmetric curvature and associated curvatures of a vector bundle E with connection Ñ on a manifold M with connection Ñ were introduced. It is well-known that a total space of semi-Riemannian vector bundle over a semi-Riemannian manifold can be made into a semi-Riemannian manifold. In this case, the relation between curvatures of the Levi-Civita connections of E and M was studied. Here, the relation between symmetric curvatures of the Levi-Civita connections and their associated curvatures of E and M is studied.

In this paper, we study the class of C 3-like Finsler metrics which contains the class of semi-C-reducible Finsler metric. We find a condition on C 3-like metrics under which the notions of Landsberg curvature and mean Landsberg curvature are equivalent.

In this paper we consider some (a, b)- metrics such as generalized Kropina, Matsumoto and F=(a+b)2/a metrics, and obtain necessary and sufficient conditions for them to be Einstein metrics when b is a constant Killing form. Then we prove with this assumption that the mentioned Einstein metrics must be Riemannian or Ricci flat.