The absence of species in polluted sediments does not necessarily imply exclusion due to toxicity. Other factors, like for instance food availability and oxygen content, could also partly cause their absence. Hence, knowledge of the (combinations of) factors acting on individual organisms is essential in order to understand how populations can persist in polluted sediments. In this study specie...

L. Kuncicka, J. Kliber, VŠB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Czech Republic P. Stepan, VŠB – Technical University of Ostrava, Faculty of Metallurgy and Materials Engineering, Czech Republic I. Mamuzic, Croatian Metallurgical Society, Zagreb, Croatia Ti-Nb alloys are of a large potential for industrial, as well as biomedical utilisation. Ox ygen...

Microgravity adversely affects several physiological systems. As space exploration moves to extended flights, understanding which mechanisms microgravity influences may contribute to the health and safety of astronauts aboard. Maximum oxygen consumption (VO2 max) testing is used to monitor changes to cardiorespiratory function. Currently the equipment used to such testing aboard the Internation...

Cysticercosis caused by Taenia solium metacestodes is a worldwide public health problem. Important progress in the development of effective and practical vaccines against this disease has been made. In this study, the promising T. solium oncospheral vaccine candidate named TSOL18 antigen was produced in a 5-liter fermentor. During the process of fermentation, the pH of the culture was always ke...

The present study was undertaken in order to measure the effect of a slight elevation of the head and shoulders upon the, cerebral circulation of hypertensive patients following sympathectomy. Twenty degree tilt was chosen because it could be tolerated for 20 minutes, as early as two weeks after the Smithwick sympathectomy. Shenkin and coworkers in 1948 reported that 200 head-up tilt did not al...

Traditionally, the oxygen content of blood has been determined by the Van Slyke vacuum extraction and manometric method. This method, although offering good accuracy and precision, suffers from several disadvantages. The operator needs extensive training and practice, the apparatus needs careful handling and cleaning, and the reagents must be made frequently and degassed. An instrument (“Lex-02...

Currently, the fundamental factors that control the oxygen reduction reaction (ORR) activity of graphene itself, in particular, the dependence of the ORR activity on the number of exposed edge sites remain elusive, mainly due to limited synthesis routes of achieving small size graphene. In this work, the synthesis of low oxygen content (<2.5±0.2 at. %), few layer graphene nanosheets with latera...

Graphene has shown enormous potential for innovation in various research fields. The current chemical approaches based on exfoliation of graphite via graphite oxide (GO) are potential for large-scale synthesis of graphene but suffer from high cost, great operation difficulties, and serious waste discharge. We report a facile preparation of graphene by rapid reduction and expansion exfoliation o...