Dataset on early-age strength of ambient-cured geopolymer mortars from waste concrete and bricks with different alkaline activators.

The dataset presented here emanates from preliminary studies that compared the early-age compressive strengths of geopolymer mortars produced from construction and demolition wastes (CDW) commonly found in Qatar using different alkaline activators. Waste concrete, waste bricks and steel slag were used as aluminosilicate sources for the geopolymer mortars. Waste concrete was used as fine aggregate (75 µm to 4 mm), while solid or hollow red clay bricks were used together with steel slag as aluminosilicate powders.

Self-Matrix N-Doped Room Temperature Phosphorescent Carbon Dots Triggered by Visible and Ultraviolet Light Dual Modes.

The synthesis of room temperature phosphorescent carbon dots (RTP-CDs) without any matrix is important in various applications. In particular, RTP-CDs with dual modes of excitation are more interesting. Here, we successfully synthesized matrix-free carbonized polymer dots (CPDs) that can generate green RTP under visible and ultraviolet light dual-mode excitation.

The use of single-stapling techniques reduces anastomotic complications in minimal-invasive rectal surgery.

Background: Leakage of rectal anastomoses is one of the most important and feared complications in colorectal surgery. Apart from patient-specific risk factors, technical aspects may influence the occurrence of anastomotic complications. This study investigated whether using single-stapling techniques (SST) instead of the double-stapling technique (DST) for minimal-invasive rectal anastomosis is associated with a lower rate of anastomotic complications.

The influence of HIV status on the duration of chemoradiotherapy for anal squamous cell carcinoma.

Background: The HIV epidemic has changed the demographic of patients with anal squamous cell carcinoma. The influence of HIV status on the ability to complete standard chemoradiotherapy was studied.

Methods: A retrospective analytic observational study was conducted of all patients presenting to the Charlotte Maxeke Johannesburg Academic Hospital radiation oncology department with anal squamous cell carcinoma from January 2014 to December 2016.