Czechoslovak Academy of Sciences

About: Czechoslovak Academy of Sciences is a based out in . It is known for research contribution in the topics: Catalysis & Adsorption. The organization has 13227 authors who have published 17335 publications receiving 272882 citations.

Selective uptake of mineral ions and their concentration factors in aquatic higher plants

Abstract: A comparative review of the elementary chemical composition of aquatic vascular plants is presented together with the author’s own results. Attention is focussed on the specific genotypic, onthogenetic and between-organs variability of the selective uptake and accumulation of mineral ions in macrophytes in relation to trophic conditions of habitat. The concentration factors and atomic ratios are also considered. Numerical tables presenting comparative data are arranged alphabetically according to plant species, with indications of geographical situation, phenology, part of plant tissues analyzed, nutrient status in biotopes and appropriate bibliography. *** DIRECT SUPPORT *** A01DO054 00003

Transformations of phenolic antioxidants and the role of their products in the long-term properties of polyolefins

Abstract: Transformation mechanisms of the most important classes of phenolic antioxidants are given for the conditions of inhibited oxidation. Properties and importance of the main types of formed products are reviewed with respect to the long-term properties of polyolefins.

Development of superfluous soldiers induced by juvenile hormone analogues in the termite,Reticulitermes lucifugus santonensis

Abstract: The synthetic juvenile hormone (JH): 17% alltrans+83%trans, trans, cis-methyl 10-epoxy-3,7,11-trimethyl-2,6 tridecadienoate and juvenile hormone analogues (JHA): methyl 10-chloro-3,7,11-trimethyl-2 dodecenoate and ethyl 10-epoxy-3,7,11-trimethyl-2,6-dodecadienoate administered on filter paper to small groups of the European subterranean termiteReticulitermes lucifugus santonensis Feyt. caused differentiation of larvae and pseudergates into pre-soldiers and/or pseudergate-soldier intercastes. In contrast to the proportion of one soldier to 100–300 other individuals in normal colonies, the effect of the compounds tested that showed JH activity was to induce the development of a large number of superfluous soldiers in quantities that even exceeded the number of other kinds of individuals. Such a disturbance in the caste ratio leads to increased mortality.