Factors Influencing COVID-19 Prevention Behaviors.

COVID-19 remains a public health emergency with prevention guidelines and mitigation strategies being constantly updated to curb the rapid spread of the disease. Despite proven successes of recommended preventive behaviors, there is low uptake of wearing a mask, washing of hands, and social distancing in the United States (US). The purpose of this study was to examine factors that influence COVID-19 preventive behaviors.

[Child dental care: what's about parental presence?].

The coping capacity of the children during dental care depends on different factors such as age, cognitive development, personal history and social background. A good knowledge and understanding of child developmental stages will help the dentist to treat them successfully. Parental presence during treatment has been largely discussed in pediatrics and pediatric dentistry.

A two-dimensional representation of relative orientations of alpha-helix residues.

Simple rules for constructing a two-dimensional representation of relative orientations of alpha-helix residues are presented. The repeat units in tropomyosin and haemagglutinin, together with their interrelationships, are also illustrated.

Human beta 2-microglobulin is a substrate of tissue transglutaminase: polymerization in solution and on the cell surface.

Incubation of purified human beta 2-microglobulin (B2-m) with tissue transglutaminase (Tgase) resulted in the formation of high molecular weight polymers revealed by sodium dodecyl sulfate polyacrylamide gel electrophoresis. In the presence of 30 mM [14C]methylamine, the polymer formation was prevented, but incorporation of methylamine into beta 2-m (equal to 1 methylamine per 1 molecule) could be observed. From the sheddings of peripheral blood mononuclear cells occurring in the presence of Tgase, it is apparent that anti-beta 2-m immunoadsorbent removed, in addition to human leukocyte antigen (HLA) and beta 2-m, some other proteins.