On the analysis of chromium plating solution containing fluosilicic acid and sulphuric acid as catalysts
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چکیده
منابع مشابه
histological evaluation of the effect of three medicaments; trichloracetic acid, formocresol and mineral trioxide aggregate on pulpotomized teeth of dogs
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15 صفحه اولthe effect of teaching reading as whole text task and paragraph task on efl learners speaking
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the importance of writing as a complex skill in applied linguistics has drawn the attention of many researchers to evaluate textbooks in order to help learners gain self-sufficiency and autonomy in the field of language use and communication. investigations have shown that developments in textbooks evaluation can promote the quality of pedagogies and consequently the learning. this study attemp...
Phthalimide-N-sulfonic acid and Isatin-N-sulfonic acid as highly efficient catalysts for the synthesis of bis-coumarins
Two highly efficient protocols for the production of bis-coumarins under solvent-free conditions have been introduced. The reaction of 4-hydroxycoumarin (2 eq.) with arylaldehydes (1 eq.) using phthalimide-N-sulfonic acid (PhtSA) or isatin-N-sulfonic acid (IsSA), as solid-acid catalysts, afforded the mentioned compounds with good to excellent yields in short times.Briefly, we have introduced tw...
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ژورنال
عنوان ژورنال: Journal of the Metal Finishing Society of Japan
سال: 1954
ISSN: 1884-3395,0026-0614
DOI: 10.4139/sfj1950.5.207