From viewpoint of molecular recognition, the dynamic aspect of cyclodextrin inclusion complex and artificial bilayer membrane are discussed. The relaxation times of deutrated guest in cyclodextrin cavities and CD spectra of synthetic azo-lipid in liposomes are shown to give highly useful informations on these biomimetic systems.
The role of water transport in the control of the elongation growth of plant stems was discussed by analyzing the growth equations. It was predicted that a water pump should be in activity during the elongation growth. The pump, however, was theoretically shown not to be a molecular entity but a highly organized semi-macroscopic system, i.e. the apoplast-canal system.
Difference of cuticular hydrocarbon composition among 45 species of ants in Japan was examined using capillary GC and GC-MS. All of the ants examined had competely different hydrocarbon profiles. In the same species, the different colony member had the same hydrocarbons but the relative intensity (Cuticular Hydrocabon Profile; CHP) among them were different. On the contrary, in the same colony, all of the members had almost identical profile. Mechanism for maintaining the uniformity of the CHP among the same colony members was examined and the importance of the presence of the queen was proved.
ρ-covering, dependent on the use of pertinent mathematical bases, is useful in describing differences between patterns of suminagashi and marbling as the relationship between techniques employed to make the patterns is also discussed. We intend to prepare the mathematical bases for the mentioned here for use incomeining fractal structures, chaos and method for the expression of general shapes such as biological systems.
Some aspects of information theoretical treatments of genes are reviewed. In particular; (1) the alignment for amino acid sequences 0f homologous protein, (2) construction of complete event systems for amino acid sequences, (3) discussion of various genetic distance matrices, (4) the methods constructing phylogenetic trees for of molecular evolution Then we consider the use of information theory to the study of genetical evolution.
As a part of effort to physically define what is the living state, we describe process of regeneration of a hydra animal from a tendem graft and a dissociated cell aggregate. Particularly, a transition from a dissociated cell aggregate which is nothing but a mechanically gathered cells to an animal which is an organically interacting cell system is, in a sense, similar to an nonequilibrium system undergoing a transition to an ordered state. Also a fundamental difference between measurement of the physical systems and the biological systems are discussed.