Islamic Art is the art of civilization based on Islamic religion. Moreover, it not only concerned with particular region or particular people rather it is a combination of different civilizations and historical circumstances as painted with Islamic weltanschauung. The Arab civilization is probably more important. Although the Arabs have little art and even then, they developed Islamic art with ...

Effective methodologies for efficient preparation of semicarbazones from aldehydes or ketones via milling and the subsequent regeneration of the parent carbonyls by gaseous nitrogen dioxide are described under solid-solid and gas-solid reaction conditions, respectively. These methods are fast, simple and environmentally benign which do not require the use of any auxiliaries such as catalyst...

Wells–Dawson tungsten heteropolyacid (H6P2W18O62) has been applied as an effective heterogeneous catalyst for one-pot synthesis of spiro[4H-pyran-3,3’-oxindoles] via reaction of various isatins, malonitrile and 1,3-dicarbonyl compound in water. The corresponding products were obtained in high yields. The catalysts were easily recycled and reused without loss of their catalytic activity. 

A series of chiral enantiomerically pure aziridines containing a phosphine moiety were synthesized and successfully applied as organocatalysts in asymmetric intramolecular Rauhut–Currier reactions p-quinone derivatives. The desired phenols achieved high chemical yields with satisfactory values enantiomeric excess (up to 98% ee, some cases). stereochemical course the title reaction may be contro...

With respect to efficient use of diminishing or harder reach energy resources, the catalysis processes that will otherwise require high overpotentials is a very important application in today's world. As newly developed class materials, high-entropy sulfides (HESs) are promising electrocatalysts for variety different reactions. In this report, HESs containing five six transition metals synthesi...

one of the major challenges in mega cities is the degree of the preparedness of organizations, institutions and people in facing with critical conditions and their immediate reaction according to pre-defined instructions. identification of priorities and acting accordingly is an undeniable factor in urban crisis management. the purpose of this research was to identify the priorities of prepared...