Catalytic evaluation of MOF-808 with metallic centers of Zr(IV), Hf(IV) and Ce(IV) in the acetalization of benzaldehyde with methanol.

In the context of climate change, it is of utmost importance to replace the use of fossil fuels as raw material in areas of industrial interest, for example, in the production of chemical inputs. In this context, a viable option is biomass, since by subjecting it to chemical processes such as pyrolysis, it is possible to obtain platform molecules that are the basis for the generation of value-added chemical products. Acetals are molecules obtained from biomass derivatives, which have various applications in cosmetic chemistry, in the pharmaceutical industry as intermediates or final compounds, food additives, among others.

[Association between refractory hypertension and cardiometabolic risk. The HIPERFRE study].

Background And Aim: Resistant hypertension (R-HT) is defined by the presence of uncontrolled blood pressure in patients treated with three or more drugs, being one of them diuretic. We sough to evaluate the prevalence and features of patients with R-HT attended at Primary Care of our environment.

Method: 1724 hypertensive patients attended by 35 physicians at 14 Primary Care Units were analyzed in this descriptive, transversal, multicentral study.

Relations between early dental calculus production and calcium and phosphate parameters of salivary fractions.

A pilot study was carried out to obtain an idea of the strength of the relations between early mandibular calculus production in humans and amounts and concentrations of bound calcium and phosphate in three salivary fractions. The salivary fractions were: (1) the spontaneous precipitate from incubated whole saliva, (2) the spontaneous precipitate from incubated centrifugal (20,000 X g) saliva supernatant and (3) the fresh centrifugal saliva sediment. Strong and highly significant correlations were found for the amount and concentration of calcium in the fresh sediment and whole saliva precipitate fractions.