Zobrazeno 1 - 10
of 205
pro vyhledávání: '"J. Holčík"'
Publikováno v:
Journal of Polymer Science: Polymer Symposia. 57:191-196
The oxidative thermal stability of isotactic polypropylene stabilized by a series of 2,6-di-tert-butyl-4-alkyl (aralkyl, cycloalkyl)phenols by means of a thermoanalytical technique was investigated. The inhibition and the course of the oxidative ther
Publikováno v:
Journal of Polymer Science: Polymer Symposia. 57:181-189
The chemiluminescence method was used for the study of thermooxidation of polypropylene. An attempt was made to interpret the time-reaction relationship of chemiluminescence. The influence of 2,4,6-trisubstituted phenols containing different substitu
Publikováno v:
Journal of Polymer Science: Polymer Symposia. 40:105-117
The efficiency of homolytic splitting of the OH bond of different phenols, bisphenols, thiophenols, naphthols, and benzophenones and the transfer of the hydrogen atom to an alkoxy or alkyl-peroxy radical is a function of the electro-affinity of the s
Autor:
J. Holčík
Publikováno v:
Journal of Applied Ichthyology. 22:40-43
Publikováno v:
Journal of Applied Ichthyology. 22:17-22
The need to gather available data on the Eurasien huchen - an important salmonid species - has been forced by a plain and, unfortunately, common fact of our times: the numbers and distribution of this biggest of salmonids have begun to decline and it
Publikováno v:
Ecological Modelling. 74:277-285
Using the Lotka-Volterra diffusion model, the authors investigated a population explosion of the German carp in the Lower Danube. Based on an examination of the existence and stability of a spatially constant equilibrium, which can depend on the grow
Publikováno v:
Journal of Chromatography A. 92:361-370
Amine antioxidants and antiozonants, vulcanization accelerators and some other additives used for the preparation of rubber mixtures were analyzed by combined gel permeation and thin-layer chromatographic methods. Attention was concentrated in the fi
Publikováno v:
Journal of Chromatography A. 106:343-348
The gel chromatographic behaviour of a series of derivatives of benzophenone, benzotriazole, salicylic acid and benzoin, some of which are used as light stabilizers for polymers, has been investigated. The elution volumes indicate the effect of the s
Autor:
J. Holčík, C. H. Fernando
Publikováno v:
Hydrobiologia. 97:127-140
The discrepancy between high primary production and poor fish yields in some tropical reservoirs, especially in Souht East Asia, is apparently due to the fact that not all available trophic levels are utilized. Data analysis has shown that this is du