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Introduction: Ureilites are ultramafic, carbon-rich achondrite meteorites, which are believed to represent mantle residues from the ureilite parent body (UPB). Approximately 1015% are polymict (brecciated) ureilites, which contain many exotic lithic and mineral clasts [e.g. 1,2]. Whether metal and sulphide phases in ureilites are indigenous to the UPB or foreign (i.e. impact-derived) is highly ...

Iron and copper are essential for plants and are important for the function of a number of protein complexes involved in photosynthesis and respiration. As the molecular mechanisms that control uptake, trafficking and storage of these nutrients emerge, the importance of metalloreductase-catalyzed reactions in iron and copper metabolism has become clear. This review focuses on the ferric reducta...

3 This paper presents the aethodology eaployed in the deteraination of the stress tensor for thin crystalline filas usine x-ray rockine curves . Use of the saae equipaent for the deteraination of the averaee stress in polyor non-c rystalline thin filas attached to a crystalline substrate is also di s cussed . In this case the lattice curvature of the substrate is deterained by measureaent of th...

اثرات ویرانگر بلایای طبیعی، اهمیت لجستیک و برنامه‌ریزی منابع انسانی را در مراحل قبل بعد از بحران نشان می‌دهد. هنگام بروز به ‌منظور امدادرسانی سریع، شبکه سلسله ‌مراتبی سلامت که شامل درمانگاه‌ها بیمارستان‌ها است، فعال می‌شود. این پژوهش با استفاده مدل ریاضی مختلط عدد صحیح درنظرگرفتن موقعیت فعلی درمانگاه‌ها، مکان‌های بهینه‌ای عنوان «مراکز درمان موقت» تعیین نحوه تخصیص بهینه مصدومان ناحیه‌های شهری مر...