Peroxidation is indicated by several physiological param eters: (1) leakage o f cell mem branes and production o f short-chain hydrocarbons, (2) degradation o f cell constituents, (3) inhibi­ tion o f chlorophyll biosynthesis, (4) accum ulation o f tetrapyrroles (pro toporphyrin IX), (5) inhibition o f protoporphyrinogen oxidase by peroxidizers, (6) alleviation o f peroxidation by inhibitors o ...

Phosphinothricin, Methionine Sulfoximine, Glutamine Synthetase, Am m onia Accum ulation, Photosynthetic Rate The effects o f DL-phosphinothricin and L-methionine sulfoxim ine on the enzymes o f nitrogen assimilation were studied. Furthermore we investigated the accumulation o f am m onia and the photosynthetic activity after the treatment o f mustard plants with phosphinothricin. Phosphino­ thr...

The accumulation o f betacyanin was reduced by the addition o f various cytokinins to sus­ pension cultures o f Phytolacca americana. The decrease in the accumulation o f betacyanin was overcome by exogenously supplied tyrosine which is a precursor o f betacyanin. Benzylaminopurine (BAP) decreased the level o f free tyrosine in the cells. Feeding experiments using labeled tyrosine revealed that...

o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o The envir nment f a binary star system may c ntain tw circumstellar disks, ne rbiting each f the stars, and a circumbinary disk rbiting ab ut the entire binary. The disk structure and ev luti n are m dified by the presence f the binary. Res nances emit waves and pen disk gaps. The binary’s t tal mass and mass rati as we...

The activity o f single neurons with constant discharge frequencies in the area around the a-lobe o f the mushroom bodies o f the bee was recorded intracellularly. The spontaneous discharge fre­ quency o f these neurons ranged between 5 and 95 impulses per second. When stimulated, about 80 percent o f the neurons responded to at least one o f five different sensory modalities: scent; light; air...

A n e t w o r k c o n t r o l system o f T r a n s p o r t A u t o m a t i c I n t e g r a l Robot (TAIP) mot i o n i n t h e r e a l environment i s suggest e d . I n p u t d a t a and g e n e r a l s t r u c t u r e o f t h e network a r e d e s c r i b e d . A program i s r e p o r t e d o f f u r t h e r e f f o r t s t o i n v e s t i g a t e and r e f i n e t h e network c o n t r o l sys...

Two studies are reported which examine the entire population o f behavior settings (N = 455) measured on 43 variables in a small midwestern town. Study I reports the results o f a factor analysis o f 43 variables measured across the entire population o f settings. Results o f Study I indicate that age, sex, role o f setting inhabitants, duration, and various behavior patterns all constitute imp...

A quantum chemical investigation was carried out to study the properties of intermolecular F•••F, Br•••Br and Br•••O interactions in crystalline 1-bromo-2,3,5,6-tetrafluoro-nitrobenzene (BFNB). This system was selected to mimic the halogen-halogen as well as halogen bonding interactions found within crystal structures as well as within biological systems. We found that fluorine atoms have weak ...

. o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o We review the evidence pertaining t the lifetimes f planet-f rming disks and discuss p ssible disk dispersal mechanisms: (1) visc us accreti n f material nt the central s urce, (2) cl se stellar enc unters, (3) stellar winds, and (4) ph t evap rati n by ultravi let radia...