A Meta-Analytic Review of Moral Disengagement and Cyberbullying

With the development of technology, cyberbullying prevalence rates are increasing worldwide, and a growing body of the literature has begun to document cyberbullying behavior. Moral disengagement is often considered a key correlate factor in cyberbullying. This article aims to conduct a meta-analysis review of the relationship between moral disengagement and cyberbullying and some psychosocial and cultural variables. Based on the PRISMA method, a random-effects meta-analysis is employed in this study to obtain reliable estimates of effect sizes and examine a range of moderators (age, gender, measure method, and cultural background). Relevant studies, published from 2005 to February 30, 2021, were identified through a systematic search of the Web of Science, ScienceDirect, SpringerLink, Pubmed, EBSCO, and Wiley Online Library. Finally, 38 studies (N=38,425) met the inclusion criteria. The meta-analysis conclusion demonstrated that moral disengagement positively correlated medium intensity with cyberbullying (r=0.341). Age, gender, and cultural background had moderated the relationship between moral disengagement and cyberbullying.

Characterization of the catalytic subunit of factor XIII by radioimmunoassay

Plasma factor XIII is composed of two subunits, a and b, whereas platelet and other intracellular zymogens have only a-subunits. The catalytic subunit, a, is the same in all forms. In order to characterize the interactions of 1- with b-chains in the plasma zymogen and a-chains with other molecules and to correlate factor XIII activity with a-protein, a specific, sensitive radioimmunoassay was developed. With the polyclonal antisera used, the assay recognizes all molecular forms of a (zymogens, activation intermediates, enzyme) equally well. The assay can be used to determine a-chain concentration in plasma and serum and in purified test systems. Fibrinogen in high concentrations affects the assay, probably by interfering with the interactions of 125I-a with antibody. However, at the plasma dilutions used in the assay, there is no significant fibrinogen effect. With this assay, the a-chain concentration in normal plasma is approximately 15 micrograms/ml. This compares with 14 micrograms/ml b-chain in plasma and indicates that all of the a- and b-chains in plasma probably circulate in the form of an equimolar zymogen complex. The serum concentration of a-protein is about 6% of the plasma concentration. There is a high correlation between a-protein and factor XIII activity.

Characterization of the catalytic subunit of factor XIII by radioimmunoassay

Plasma factor XIII is composed of two subunits, a and b, whereas platelet and other intracellular zymogens have only a-subunits. The catalytic subunit, a, is the same in all forms. In order to characterize the interactions of 1- with b-chains in the plasma zymogen and a-chains with other molecules and to correlate factor XIII activity with a-protein, a specific, sensitive radioimmunoassay was developed. With the polyclonal antisera used, the assay recognizes all molecular forms of a (zymogens, activation intermediates, enzyme) equally well. The assay can be used to determine a-chain concentration in plasma and serum and in purified test systems. Fibrinogen in high concentrations affects the assay, probably by interfering with the interactions of 125I-a with antibody. However, at the plasma dilutions used in the assay, there is no significant fibrinogen effect. With this assay, the a-chain concentration in normal plasma is approximately 15 micrograms/ml. This compares with 14 micrograms/ml b-chain in plasma and indicates that all of the a- and b-chains in plasma probably circulate in the form of an equimolar zymogen complex. The serum concentration of a-protein is about 6% of the plasma concentration. There is a high correlation between a-protein and factor XIII activity.