The effect on the electrocatalytic activity of the chemical interaction of selenium with palladium centers: oxygen reduction and methanol oxidation reactions in alkaline medium.

The chemical reactivity of two different selenium precursors (SeOand Se) with nanoparticulated palladium was studied in a simple aqueous phase synthesis to generate palladium selenides (PdSe). As confirmed by XRD, XPS, TEM and energy dispersive spectroscopy analyses, the products generated showed different degrees of selenization according to the nature of the chemical precursor. Such degree of selenization was more important with elemental selenium, in contrast to SeO.

Synthesis, characterization and biological evaluation of octyltrimethylammonium tetrathiotungstate.

Octyltrimethylammonium tetrathiotungstate salt (ATT-C8) was synthesized and its ability to chelate copper was evaluated. The biological and toxic aspects were evaluated by in vitro and in vivo assays, using bovine aorta endothelial cells (BAEC) and zebrafish (Danio rerio) embryos. The obtained results suggest that ATT-C8 has better biocompatibility, showing a significantly lower lethal concentration 50 (LC) value in comparison to ammonium tetrathiotungstate (ATT).

Usefulness of serum amylase and lipase as predictors of the severity of post-endoscopic retrograde cholangiopancreatography pancreatitis.

Background: Post-ERCP pancreatitis (PEP) is the most common complication of Post-endoscopic retrograde cholangiopancreatography.

Objective: to demonstrate whether serum amylase and lipase values correlate with the presence and severity of PEP.

Method: We conducted a retrospective, observational and analytical study of patients who underwent ERCP, those who developed pancreatitis were classified by severity according to the 2012 revised Atlanta criteria and their serum enzyme levels were analyzed.

Complicated diverticular colon disease in patients younger than 35 years: report of two cases and literature review.

Background: Complicated colonic diverticular disease in young patients is a rare entity, with an incidence <10% from all patients in the largest series.

Clinical Cases: We present two cases of complicated diverticular disease in patients <35 years old treated at the Hospital Juárez of México City. Both patients had acute abdominal pain with several days of evolution.

[Postobstetric rectovaginal fistula: surgical treatment using endorectal advancement flap].

Background: Rectovaginal fistulas account for <5% of all rectal fistulas. Obstetrical injuries are the most common cause of these types of fistulas. There have been a multitude of surgical approaches developed for operative repair.