The accumulation and distribution of 40K and 137Cs in tropical plant species were studied through measurements of gamma-ray spectra from mango, avocado, guava, pomegranate, chili pepper, papaya and manioc trees. Our goal was to infer their differences in the uptake and translocation of ions to the aboveground plant parts and to establish the suitability of using radiocaesium as a tracer for the...

More K(42), Rb(86), and Br(82) was accumulated by intact tobacco plants and root systems from detopped plants during the night than during the day when studies for both periods were made in dark rooms controlled at 18 degrees . More, however, was translocated to shoots during the day than during the night in intact plants. This latter effect parallels the periodicity of exudation in root system...

Lead acetate treatment of unfixed cells immobilizes the intracellular water-soluble, inorganic orthophosphate ions as microcrystalline lead hydroxyapatite precipitates (see reference 1). These precipitates have been analyzed with the electron microprobe. A much higher concentration of phosphorus has been found in the nucleoli of maize root tip cells fixed in lead acetate-glutaraldehyde (organic...

Accumulation of K(+) is insensitive to the anion supplied with it at a solution concentration below 1 mm. Rates of K(+) transport to the xylem from the same solutions are, however, dependent upon the anion present and decrease in the order NO(3) (-) >> Cl(-) > SO(4) (2-). Parallel effects on rates of exudation and anion transport result from kind and concentration of anion supplied and time of ...

The objective of this paper is to propose a simple and robust additive solution improve the water-resistance clay materials by revisiting traditional recipe vernacular construction. influence combination oak tannin with iron chloride on properties in terms rheological behavior, compressive strength, water resistance was studied. We show that adding can annihilate deflocculation action complexat...

Even so, extensive research has been carried out on potential eco-toxic effects of particulate and extensively degraded oxo-biodegradable plastics when mixed with soil. Tests included seed germination and plant growth rates, compared with the same soil without degraded plastics [3,4], the effects on macro-organisms (worms, daphnia, etc.) in the soil [4] and on the accumulation of transition met...

Rat liver mitochondria allowed to accumulate maximal amounts of Ca(++) and HPO(4) (=) ions from the suspending medium in vitro during respiration have a considerably higher specific gravity than normal mitochondria and may be easily separated from the latter by isopycnic centrifugation in density gradients of sucrose or cesium chloride. When the mitochondria are allowed to accumulate less than ...

The high salinity of soil salts limits plant growth. Wheat is sensitive to toxic levels mineral salts. Salinity leads the accumulation ions in all organs wheat. Depending on level ion accumulation, wheat defined as salt stress-tolerant or -sensitive. variety Zolotaya accumulated Cl? and Na+ a greater extent than Orenburgskaya 22 variety. was accompanied by an increase ROS damage root tissues up...

Lithium (Li) has been reported to inhibit numerous adenylate cyclases, but often these reports used clinically toxic concentrations of Li and their relevance to a theory of Li action was questionable. The present report demonstrated Li inhibition beginning at 2 mM of the norepinephrine (NE)-induced cyclic AMP accumulation in a resuspended P2 pellet containing intact synaptosomes and in slices f...

Two studies are included: tungsten accumulation in the main plasma and radiation processes of carbon ions in the detached plasma of JT-60U. [Tungsten] It has been found that tungsten accumulation becomes more significant with increasing plasma rotation velocity against the plasma current direction, where negative radial electric field is formed. The accumulation level does not depend on the tun...