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A field survey of the bee fauna was conducted in the north of Iran during 2009 to 2015. Special concern was given to the tribe Ceratinini (Hymenoptera; Apidae). Ten species of the genus Ceratina were collected and identified in the present study. Three species are recorded for the first time from Iran, including Ceratina (Euceratina) chrysomalla Gerstaecker 1869, Ceratina (Euceratina) cyanea (Kirby, 1802) and Ceratina (Euceratina) gravidula Gerstaecker, 1869. An updated checklist of Iranian Ceratinini with short description and figures of newly recorded species are provided. The host plants and distribution of each species are also given.

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In the current century, the world is full of competition and unreliable environmental factors.The prerequisite for success in this field is to pay attention to the organizational culture and its changes. This paper is studying “process of strong breaking and weak training culture in Iranian state organizations”. Considering the research methodology, and using the theory of database, a suitable model was designed and tested. A sample of 25 university elites and experts selected by Snowball method, and with the help of exploratory and coding-focused interviews, 16 categories and 72 concepts obtained and then the final model presented with focused coding and selective coding. The proposed model tested and confirmed through data gathered by a validated questionnaire from 385 managers and experts of governmental organizations. In the outputs of confirmatory factor analysis LISREL8.80 software, since the factor loads of all standard model items are higher than 0.3 and the coefficients of the significant model are all above 1.96, also, fitting table indexes indicate that the model is appropriate, so all factor loads and path coefficients are meaningful. Therefore, not only the validity and reliability of the questionnaire confirmed, but also the relationships between the components of the model are acceptable. In the output of modeling the structural equations of SmartPLS software, since all the coefficients of the meaningful model are higher than 1.96, 95% of the results confirm the validation of the governing relationships on the components of the proposed model. That is, they have significant impact on each other and their path coefficient is showing the amount of effectiveness.
 

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Background: Modern science in drug delivery systems has long been paid to effectively design drug delivery systems, to reduce side effects, increasing bioavailability, targeted drug delivery, and passing through blood-brain barriers. Nanoparticles are very important as carriers because they  carry different types of drugs to different parts of the body at the right time. Method: In the present study, thiolated nano chitosan loaded with Biperiden was synthesized by ion gel method using two types of crosslinkers (tripolyphosphate and genipin) and their efficiency was investigated. Results: FTIR analysis confirmed the successful synthesis of various stages of thiolated nano chitosan loaded with Biperiden by both crosslinkers. SEM images showed that as-synthesized nano-carriers have a nanorod structure and nanocarriers crosslinked by genipin had a more regular structure with a size of about 150 nm than nanocarrier crosslinked by TPP with a size of approximately 200 nm. In vitro drug release and cytotoxicity studies showed nano-carriers crosslinked by genipin have had a higher release and less cytotoxicity than nano-carriers crosslinked by TPP. Conclusion: Considering the lower toxicity and delayed release of nanoparticles synthesized with genipine than nanocarriers synthesized with TPP, the use of this nanocarrier increases the bioavailability of the drug and can be used as a suitable drug delivery system.