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The hydrophobic cell wall polymer lignin is deposited in specialized cells to make them impermeable to water and prevent cell collapse as negative pressure or gravitational force is exerted. The variation in lignin subunit composition that exists among different species, and among different tissues within the same species suggests that lignin subunit(More)
There are two closely related hik31 operons involved in signal transduction on the chromosome and the pSYSX plasmid in the cyanobacterium Synechocystis sp. strain PCC 6803. We studied the growth, cell morphology, and gene expression in operon and hik mutants for both copies, under different growth conditions, to examine whether the duplicated copies have(More)
The structure of a procapsid of the single-stranded DNA bacteriophage ++phiX174 was determined to 3.5 A resolution. The crystal space group was I213 with a unit-cell length of 774 A. The unit cell contained 16 icosahedral virus particles, each situated on a crystallographic threefold axis. Thus, there are two independent one-thirds of a particle per(More)
The unicellular diazotrophic cyanobacteria of the genus Cyanothece demonstrate oscillations in nitrogenase activity and H2 production when grown under 12 h light–12 h dark cycles. We established that Cyanothece sp. PCC 7822 allows for the construction of knock-out mutants and our objective was to improve the growth characteristics of this strain and to(More)
The present views are outlined on the principles of information code in the nervous system. It is shown that the frequency modulation of the rhythmical neuronal activity alone is unable to provide the processing and coding of the information necessary for cognitive activity. The fluctuation of the between-impulse intervals which has been revealed by many(More)
Acute experiments on 86 adult rabbits have shown that in the early period of Cannon's traumatic shock nalophine and naloxone relieve torpidity, restore motor activity and responses to standard stimuli. This prolongs the animal life (nalorphine) and increases the survivability (naloxone). However in some rabbits a premature relief of torpidity (0.5 mg/kg of(More)
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