نتایج جستجو برای: reaction progress
تعداد نتایج: 563462 فیلتر نتایج به سال:
The one-pot four component synthesis of 3-(Imino)-2,3-dihydropyrrolo[2,1-a]isoquinoline-1,1(10bH)-dicarbonitrile derivatives via a catalyst-free reaction between aryl aldehydes, malononitrile, isoquinoline and isocyanides was successfully conducted in glycerol as a benign, nontoxic and biodegradable promoting reaction medium. The progress of the reaction with two different common purification m...
Although the motivating role of feedback and progress indicators is understood in formal learning, their role in supporting incidental mobile learning is less well understood. In this paper we argue that well-designed feedback and progress indicators (FPIs) offer guidance and structure that may encourage mobile app users to move from fragmented learning episodes towards a longer term, reflectiv...
For user-friendliness purposes, many modern software systems provide progress indicators for longrunning tasks. These progress indicators continuously estimate the percentage of the task that has been completed and when the task will finish. However, none of the existing program compilation tools provide a non-trivial progress indicator, although it often takes minutes or hours to build a large...
in this thesis, a better reaction conditions for the synthesis of spirobarbiturates catalyzed by task-specific ionic liquid (2-hydroxy-n-(2-hydroxyethyl)-n,n-dimethylethanaminium formate), calcium hypochlorite ca(ocl)2 or n-bromosuccinimide (nbs) in the presence of water at room temperature by ultrasonic technique is provided. the design and synthesis of spirocycles is a challenging task becaus...
The growth of e-learning, and subsequently, of blended learning in recent years in response to the global demand for increased productivity in education and training has been astounding! While the commercial response, including that of universities, to this rapid increase in demand and to the associated potential of communications technologies to provide global access has been impressive, signi...
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