نتایج جستجو برای: emergence of new
تعداد نتایج: 21359187 فیلتر نتایج به سال:
objective: the objective of this study was to investigate the invitro fluoride release of four new self-adhesive resin cements; set (sdi, australia), breeze (pentron, usa), embrace wetbond (pulpdent, usa), g-cem (gc, japan) and to assess the bonding performance of these self-adhesive resin cements for bonding of orthodontic brackets. materials and methods: for fluoride release experiment, six ...
some new water-soluble schiff base complexes of na2[m(5-so3-1,2-salophen)].nh2o; (5-so3-1,2-salophen = n,n’-bis(5-sulphosalicyliden)-1,2-phenylendiamine); na2[m(5-so3-2,3-salpyr)(h2o)n].2h2o; (5-so3-2,3-salpyr = n,n’-bis(5-sulphosalicyliden)-2,3-diaminopyridine); and na2[m(5-so3-3,4-salbenz)(h2o)n].nh2o; (5-so3-3,4-salbenz = n,n’-bis(5-sulphosalicyliden)-3,4-diaminobenzophenon); where m = cu, n...
Influenza viruses continue to be a major health threat in human and bird populations. The improvements in formulation and production level of the current influenza vaccines are not sufficient to afford complete protection. The continuous antigenic drifts and emergence of endemic and zoonotic strains make influenza vaccine planning difficult. Concern about the emergence of new influenza pandemic...
چکیده نمایشگاه های جهانی یا اکسپو عنوانی ست که از سال 1851 میلادی در لندن توسط همسر ملکه انگلستان شکل گرفت ، هدف اولیه این نمایشگاه ها نمایش دستاورد های صنعتی بود، اما در طول 165 سال که این نمایشگاه های برگزار گردیدند ، رویکرد آنها تغییر کرده است . در هر دوره به یک شعار که در واقع دغدغه اصلی جهان، در آن زمان بوده است ، پاسخ داده شده و راه حل کشور های مختلف در مورد آن موضوع به نمایش گذارده شد...
Background and Objectives: Following the emergence of COVID-19 caused by the SARS-CoV2, the reasons for the emergence of the novel virus have been the subject of interest for molecular biology researchers and news agencies. This article attempted to emphasize all aspects of the emergence of this virus and discuss the latest information related to its development. Materials and Methods: From th...
Although the subject of religion has always played a marginal role in international politics, and it has been less regarded as an independent variable in understanding the events of the international system, various events such as the victory of the Islamic Revolution in Iran, the Quds and Palestine issue, the September 11th terrorist attacks on the World Trade Center, and Pentagon in th...
The present paper is a comparative study of the historical origins of the emergence of the two Tafkik (Khorasan School of Gnostic Knowledge) and Akhbari schools. This paper is a prerequisite and an introduction to a simultaneous examination of the principles of Quranic interpretation in these two schools. In recent years, some research papers have named the Tafkik School a neo-Akhbari school an...
The archaeological mound of Sofalin south of the Alborz Mountains of Northern Iran (Eastern Rey plain) sheds considerablelight on at least four problems connected with the emergence of complex societies in this part of Iran. The first, it helpsfill a chronological gap in an important archaeological sequence by revealing a previously unidentified late fourth andthird millennium B.C. sequence of ...
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