Effect of low temperature calcination on micro structure of hematite nanoparticles synthesized from waste iron source.

Hematite (α-FeO) nanoparticles have been synthesized from waste source of iron which contains a prominent amount of iron (93.2 %) and investigated the effect of low temperature calcination. The two-step synthesis method involved preparing ferrous sulfate through acid leaching process followed by oxidation and calcination at temperatures ranging from 200 to 400 °C to produce the desired α-FeO in nano form.

Are we preparing healthy & responsible adolescents? Exploratory qualitative study to understand the health and social issues of adolescent living in Karachi, Pakistan.

This study aimed to understand the lives of adolescents living in squatter settlements of Karachi, Pakistan regarding their assigned roles and responsibilities, health and social issues, their decision-making process, and mechanism and channels of information. An exploratory descriptive qualitative study design was employed. Purposive sampling techniques were used to carry out Focus Group Discussions (FGDs) with adolescents (n = 10, Participants = 190), adolescents' parents (n = 10, Participants = 180), and In-Depth Interviews of with key adolescent stakeholders (n = 20).

Assessing post-TAVR cardiac conduction abnormalities risk using an electromechanically coupled beating heart.

Transcatheter aortic valve replacement (TAVR) has rapidly displaced surgical aortic valve replacement (SAVR). However, certain post-TAVR complications persist, with cardiac conduction abnormalities (CCA) being one of the major ones. The elevated pressure exerted by the TAVR stent onto the conduction fibers situated between the aortic annulus and the His bundle, in proximity to the atrioventricular (AV) node, may disrupt the cardiac conduction leading to the emergence of CCA.

Correction: A computational study of the thortveitite structure of zinc pyrovanadate, ZnVO, under pressure.

[This corrects the article DOI: 10.1039/D3RA02426A.].