Aluminum and silicon are usually abundant in the soil and most plants are affected by them. Therefore, in the present study, the effect of the interaction of Si (0 and 2 mM) and low concentrations of Al (0, 50, 100, and 150 µM) on some physiological parameters of Zea mays var. Merit were investigated and were analyzed by cluster heatmaps for better interpretation of results. Results showed that...

Analyzing variations in silicon (Si) isotopes can help elucidate the biogeochemical Si cycle and Si accumulation processes of higher plants. Importantly, the composition of Si isotopes in higher plants has yet to be studied comprehensively and our knowledge of the distribution of Si isotopes in higher plants lags behind that of Si isotopes in marine organisms, such as diatoms. In the present st...

background:  nowadays mri examinations have been widely used in clinical applications for many diagnoses. the use of contrast agent in mri improves lesion detection and characterization and causes more accurate diagnosis.  objectives: the aim of this study was comparing to optimal dose of magnevist contrast agent in modified t1w se (spin echo), t1w fse (fast spin echo) and t1w gre (gradient ech...

in this research, using pyrolysis of phenolic resin in the presence of silicon particles, the sic ceramic composite is formed. the samples were prepared by introducing 30, 35, 40, 45 and 50 wt% of si particles to the phenolic resin. the samples were cured at 180°c then carbonized at 1100°c. the final carbonized c/si composites are hot-pressed at 1500°c in inert atmosphere, which is more than th...

کسب‌وکارهای خانوادگی و بین‌المللی­‌شدن آن‌ها توجه روزافزونی را به خود جلب کرده است. در طی سال‌ها پژوهشگران سعی کرده‌اند ویژگی‌های مختلف شرکت‌های که موفقیت بازارهای بین‌المللی کمک می‌کنند، شناسایی کنند. این پژوهش بر خانواده‌گرایی تمرکز شده بررسی می­‌شود چگونه خانواده­‌گرایی فرایند بین‌المللی‌­شدن نقش ایفا می‌کند. خانواده‌­گرایی شایستگی‌ها قابلیت‌هایی اطلاق می‌شود خانوادگی، به­دلیل تعامل بین خانو...

به منظور تولید رادیوایزوتوپ تکنسیم-۹۹ حاصل از واپاشی رادیواکتیو مولیبدن-۹۹ و خالص‌­سازی محصول فرایند انحلال اسیدی هدف مینیاتوری، لازم است آلودگی ید گازی در حد قابل قبولی کاهش یابد. این جاذب‌های جامد استفاده می‌شود. یکی بهترین مورد موردنیت حاوی نقره تشکیل شده است. پژوهش روش سنتز مشخصات جاذب بررسی قرار گرفته برای تهیه بلورهای حفره‌دار با اندازه حدود ۱۰ میکرومتر نسبت آلومینیم سیلیکون برابر 2/5 شد ...

Polymorphous Si is a nanostructured form of hydrogenated amorphous Si that contains a small fraction of Si nanocrystals or clusters. Its thermally induced transformations such as relaxation, dehydrogenation, and crystallization have been studied by calorimetry and evolved gas analysis as a complementary technique. The observed behavior has been compared to that of conventional hydrogenated amor...

Model and Methods Energy Hamiltonian.To extend a structure-based model to systems with multiple basins, we modified the contact map and the dihedral angles. Note that all the residue indexes are rearranged from 1 to 366 in the model. To include the side chain dynamics on the conformational change of enzyme, we developed a coarse-grained model in which each amino acid is represented by one or tw...