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The issue of economical competition between the powers is one of the main problems of China and for this purpose, this country for opposition against the threats and enjoying the chances tries to release from the existing communication and geopolitical obstacles by investment at the strategic points of the area including Gwadar in Pakistan and be able to maintain his priority in the global economy through coping with the internal problems.china's investment in Gwadar of Pakistan has caused the promotion of geopolitical and economical weight of Pakistan and also has some impacts on the area including Chabahar Port in Iran. With respect to this subject, in this research it is tried to , while studying the geographical situation of the area and the effective geopolitical features in forming this contract , its effect on Chabahar port to be studied and analyzed. The research findings shows that the commissioning consequences of Gwadar port will impact on the national interest of Iran inside and outside of the country. The effects of such investment will cause some changes in the area that seems, if the strategy for using competition between the powers is not been considered and no action is made for development of Chabahar port, the national power of the country will be weakened.

Background: Hospital operating rooms are one of the most sensitive parts of hospital which observe their hygiene is very important. Fungal spores present in the hospital air can cause many nosocomial infections. The Aim of this study was to determine the prevalence of fungal pollution in the air of operation room in the Alborz Province selected hospitals. Methods: In this study, the operating rooms of two hospitals were selected according to the type of activity and hospitalized patients for sampling. Sampling was carried out before the first operation at 6 AM, when the operating room had been disinfected by UV light, and after the last operation at 12 PM, when the pollution was too much. Samples were cultured on Sabouraud Dextrose Agar according to open plate method. Results: The most fungi found in the hospitals operating rooms air were allocated to the Cladosporium, Penicillium, Mucor, and Aspergillus flavus genus which were equal to 36.8%, 18.47, 13.2, and 10.5%, respectively. The highest and lowest pollution rate was related to operating room and cosmetic surgery room, respectively. Conclusion: According to the obtained results, a positive pressure ventilation system can be a good option to control and prevention of nosocomial infections caused by fungi agents.