Clinical outcomes in patients with diabetes and stress hyperglycemia that developed SARS-CoV-2 infection.

Introduction: Diabetes and stress hyperglycemia have been related with poorer clinical outcomes in patients infected by SARS-CoV-2 and at risk for severe disease.

Objective: To evaluate clinical outcomes in three groups of patients (with diabetes, without diabetes and with stress hyperglycemia) with SARS-CoV-2 infection.

Materials And Methods: A retrospective cohort study was conducted in Cali (Colombia).

Structural, Thermal, and Release Properties of Hybrid Materials Based on Layered Zinc Hydroxide and Caffeic Acid.

Caffeic acid (CA) molecules were immobilized in a layered inorganic host matrix based on zinc hydroxide structures with different starting interlayer anions, nitrate, and acetate. The chemical composition, structure, thermal stability, morphology, and surface of the host matrices and hybrid compounds were analyzed by X-ray diffraction (XRD), themogravimetric/differencial thermal analysis (TG/DTA), Fourier transform infrarred spectroscopy (FT-IR), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS). Additionally, the surface charge of the materials was investigated using zeta potential at pH ~7.

Electrical Behavior of a Catalyst Composed of Laminar Manganese Oxide Supported on γ-AlO.

The electrical characterization of catalysts composed of layered manganese oxide in the form of birnessite supported on γ-AlO, which have been successfully used in the combustion of soot, is presented. The results indicate that the electrical conduction and ion conduction processes are influenced by the amount of the active phase. There was also evidence of Grotthuss-type proton conductivity favored by the presence of surface water on the exposed alumina surface.

Structural and Electrical Studies for Birnessite-Type Materials Synthesized by Solid-State Reactions.

The focus of this paper is centered on the thermal reduction of KMnO at controlled temperatures of 400 and 800 °C. The materials under study were characterized by atomic absorption spectroscopy, thermogravimetric analysis, average oxidation state of manganese, nitrogen adsorption-desorption, and impedance spectroscopy. The structural formulas, found as a result of these analyses, were K 0.

Structural Analysis and Conduction Mechanisms in Polycrystalline Zinc Hydroxide Nitrate.

The conduction and dielectric properties in zinc hydroxide nitrate (ZHN) were studied in detail as a function of the temperature and relative humidity by impedance spectroscopy, and the structure was investigated by X-ray diffraction (XRD). Elemental analysis indicated a layered material containing carbonate anions [Zn(OH)(NO)(CO)·1.7HO] due to the high capability of adsorption of ZHN, which makes this material appropriate for applications in real conditions.

New layered double hydroxides containing intercalated manganese oxide species: synthesis and characterization.

Manganese oxide species (MnO(x)) have been intercalated within the gallery spaces of Mg-Al layered double hydroxides (LDHs). Synthesis of these materials was achieved by ion-exchange of the LDH-nitrate precursor with permanganate anion followed by reduction with organic reagents, such as glucose, ethanol, and ascorbic acid. Elemental analysis, X-ray diffraction, FT-IR spectroscopy, Raman spectroscopy, HR-TEM, and N(2) sorption analyses have been used to characterize these materials.

Double-Aging Method for Preparation of Stabilized Na-Buserite and Transformations to Todorokites Incorporated with Various Metals.

A double-aging method has been developed to prepare and stabilize Na-buserite. In the first step, Na-buserite is synthesized by aging a MnO(x)() gel, which is produced from the oxidation of Mn(OH)(2) in NaOH solutions by KMnO(4) in the presence of Mg(2+). Stabilization of Na-buserite is done by further aging the as-synthesized buserite in distilled deionized water.