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Video Abstract1_b57lp6f2Kaltura

Surgical site infection (SSI) remains one of the most common complications of perforation peritonitis, contributing not only to morbidity but also mortality. We studied the culture and sensitivity of intra-peritoneal fluid and post-operative laparotomy wounds, and found consistency in pathogen and sensitivity between the intra and post-operative samples in 25 cases (80.6%). Therefore, routine culture and sensitivity of peritoneal fluid and subsequently switching the empirical anti-microbial therapy accordingly is justified.

This work presents preparation of a surface modified magnetically tuned solid acid where thiol groups were grafted on magnetic halloysite, followed by oxidation of thiol groups to sulfonic acid groups. The physicochemical properties of the catalyst were analyzed by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), powder X-ray diffraction (XRD), high resolution transmission electron microscopy (HR-TEM), selected area electron diffraction (SAED), scanning transmission electron microscopy (STEM) elemental mapping, field emission gun scanning electron microscopy (FEG-SEM), energy dispersive X-ray analysis (EDX), the Brunauer–Emmett–Teller (BET) method and vibrating-sample magnetometry (VSM). The catalyst could be recovered and reused at least 5 times without substantial loss of its catalytic activity. This study delivers a green protocol for the synthesis of bisamides and 4H-pyrans without the need for further purification by column chromatography.

Sulfonated carbon/silica composites derived from biomaterials viz. glucose, maltose, cellulose, chitosan and starch exhibited high catalytic activity for the one-pot synthesis of Hantzsch 1,4-dihydropyridines under solvent-free conditions, and for one-pot synthesis of 2,4,5-trisubstituted imidazoles and 2-arylbenzimidazoles under liquid phase catalysis. The activity of sulfonated carbon/silica composites derived from starch was found to be superior to other sulfonated carbon/ silica composites. The excellent conversions showed that the catalyst has strong and sufficient acidic sites, which are responsible for its catalytic performance. Moreover, these solid acid catalysts owned the advantages of high selectivity and recyclability.

In the title reaction a highly active, selective, stable and recyclable catalyst is used.