Electronic calculation trainers for physically handicapped pupils--an example of how to use electronics in the field of individualized instruction at schools for the physically handicapped (author's transl)

The article demonstrates, on the basis of arithmetic lessons with physically handicapped pupils, that individualised teaching methods can be considerably more effective with the aid of technology. The demand for extreme individualized instruction justified not only by psychological but also physical reasons, is attempted to be met in an important partial area, i.e., the acquisition of arithmetical skills by means of practice. Within the framework of a research project carried out on behalf of the Federal Minister of Labour, a device has been developed which takes into consideration the medical, special educational and technical viewpoints and helps to meet the practical requirements whilst taking into account the multidisciplinary problem complex. the device is an electronic trainer for mental arithmetic exercises which can be constructionally adapted to the pupil's physical deviation. It is programmed by the teacher in accordance with the different performance levels and is then a direct partner irrespective of the pupil's degree of disability.     

School-related injuries: incidence,causes, and consequences

BACKGROUND: School accidents are frequent but little epidemiological information is available to guide prevention. In this study we examined the incidence, causes, and consequences of school accidents as a function of the pupil's characteristics. METHODS: An epidemiological study was conducted in all 2 396 adolescents attending two secondary school groups. Sociodemographic characteristics of the pupils and data on school accidents during a one-year period were collected using a questionnaire filled out by the school nurse in the presence of the victims. The chi-square independence test, Fisher's exact test and the logistic regression method were used for the statistical analysis. RESULTS: Sports and physical training (SPT) accidents accounted for 52.8% of the accidents, recreation accidents for 12.7% and other accidents for 33.6%. The annual incidence of one accident or more, for all types of accidents combined, was 12.9%, that for two or more accidents 2.3%. The rate of SPT and recreation accidents decreased strongly with age. SPT accidents were more frequent in girls, the other accidents more frequent in boys. Among the SPT accidents, 69.2% occurred under training conditions and 33.7% were caused by another person. Causes mentioned by the victims were: carelessness (26.0%), clumsiness (17.5%), misappreciation of risk (13.8%), tiredness (9.5%), nervous irritation (8.6%), rowdyism (6.0%), disrespect of the teacher's instructions (6.0%). The lesions were: contusions (50.7%), wounds (18.7%), tendinitis (11.7%), wrenches (9.2%), others (7.3%). They differed between age groups, sex, and category of sports. Localizations were mainly: fingers (27.4%), other localizations of the upper limb (20.1%), head (20.6%). A physician was consulted for 19.5% of the accidents and hospitalization followed 2.7%. Absence from school and exemption from SPT were frequent (11.4% and 16.3% respectively). CONCLUSION: The results could be used to inform adolescents so they and their families could become more aware of the risk of school accidents. Prevention should mainly focus on the younger children. An effort must be made regarding risk assessment in order to help the pupils become more careful and responsible during their sports activities. The choice of these activities and the materials used should be made more suitable for adolescents.     

Simultaneous spectrophotometric determination of oxidized and reduced glutathione in human and rabbit red cells

An improved spectrophotometric procedure for oxidized and reduced glutathione determination in erythrocytes is described. The method is based upon a reaction using Ellman's reagent. It gave recoveries of 99 and 90% for both GSH and GSSG. The use of oxidized glutathione as an internal standard makes it accurate for simultaneous assay. The method offers the advantage of not having to use alkylation products to prevent oxidation of GSH during protein precipitation. Data are presented to demonstrate reliability and simplicity of rapid estimation of GSH and GSSG.     

Targeted tumor therapy by epidermal growth factor appended toxin and purified saponin: An evaluation of toxicity and therapeutic potential in syngeneic tumor bearing mice

Targeted toxin-based therapeutics are hindered by poor intracellular uptake, limited stability and non-specific immune stimulation. To address these problems, ligand-targeted toxins in combination with low dose saponin mixtures have been adapted and tested in vivo in the past, however, undefined saponin raw mixtures are not suitable for use in clinical development. In the present work we therefore used a targeted toxin (Sap3-EGF, i.e. saporin fused to epidermal growth factor) in combination with a structurally defined isolated saponin m/z 1861 (SO-1861). In vitro evaluation confirmed a 6900-fold enhancement in the cytotoxic efficacy of Sap3-EGF against TSA-EGFR target cells. The required dose of the targeted toxin was appreciably reduced and there was a highly synergistic effect observed. An ex vivo hemolysis assay showed no or very less hemolysis up to 10 μg/mL of SO-1861. In the acute toxicity studies SO-1861 was found to be non-toxic up to a dose of 100 μg/treatment. The enzymes aspartate aminotransferase, alanine aminotransferase, and glutamate dehydrogenase did not show any statistically significant liver damage, which was further confirmed by histological examination. Additionally, creatinine was also similar to the control group thus ruling out damage to kidney. In vivo studies in a syngeneic BALB/c tumor model characterized by EGFR overexpression were done by applying 30 μg SO-1861 and 0.1 μg Sap3-EGF per treatment. A more than 90% reduction (p < 0.05) in the average tumor volume was observed by this combined therapy.     

A longitudinal study on the COVID-19 pandemic and its divergent effects on social participation and mental health across different study groups with and without mental disorders

Purpose

With the rapid spread of COVID-19 and the restrictions imposed in many parts of the world, there is growing concern about its impact on mental health. This longitudinal study investigated the social participation, social inclusion and psychological well-being in adults with and without mental disorders before the beginning of the pandemic, as well as during and after strict lockdown restrictions in Germany.

Methods

The sample (n = 106) consisted of three groups: participants with a chronic mental disorder, with an acute mental disorder, and without a mental disorder at the time of the initial survey. Parameters of interest were assessed using the Measure of Participation and Social Inclusion for Use in People with a Chronic Mental Disorder (F-INK), the Index for the Assessment of Health Impairments (IMET) and the Brief Symptom Inventory (BSI-18).

Results

The perceived impairments in social participation and the associated changes in behaviour varied depending on the presence of a mental disorder at the time of the initial survey and were largely temporary, i.e. limited to the period of strict lockdown restrictions. We found no further detrimental effects on mental health 4 weeks after lockdown or later, when a policy of physical distancing was in place.

Conclusion

Overall, our findings suggest a general resilience to the official restrictions and measures as well as the pandemic itself. However, further efforts are needed to improve the situation of people with chronic mental disorders and their limited opportunities for social participation.