The time course ofcadmim uptake by the roots of intact tomato plats (Lycoperskba escuaetum MDL) was measured In a nutrient solutin with a micromolar cadmium concentration untfl all cadmium In the medim was exhausted. Exhaustion taking a few hours, cadmium was repeatedl added to the nutrient solution. Tle initial rate of cadmium uptake was computed for each cadmium addition. This rate sharply in...

Pechová A. , L. Pavlata , J . I l lek: Blood and Tissue Selenium Determination by Hydride Generation Atomic Absorption Spectrophotometry. Acta Vet. Brno 2005, 74: 483-490. The aim of the study was to optimize the method of blood and tissue selenium determination in ruminants, and to implement it in research and diagnostic practice. A method was developed for selenium determination by hydride ge...

Nitrate uptake has been studied in nitrogen-deficient cells of the marine diatom Skektowema costatum. When these cells are incubated in the presence of nitrate, this ion is quickly taken up from the medium, and nitrite is excreted by the cells. Nitrite is excreted following classical saturation kineffcs, its rate being independent of nitrate concentration in the incubation medium for nitrate co...

Symptoms of nutrient deficiency in carambola {Aver rhoa carambola L.), lychee (Litchi chinensis Sonn.) and papaya (Carica papaya L.) trees have been observed periodically in south Florida, but have not been experimentally verified. Young 'Arkin' carambola, 'Mauritius' and 'Brewster' lychee and 'Cariflora' papaya were grown in 26-liter containers filled with coarse silica sand, irrigated with de...

Carbon assimilation, translocation, and associated biochemical characteristics of the second trifoiolate leaf (numbered acropetally) of chambergrown soybean, Glycine max (L.) Meff., plants were studied at selected stages of leaf development during the period from 10 to 25 days postemergence. Leaves of uniform age were selected on the basis of leaf plastochron index (LPI). The test leaf reached ...

A major problem remaining in the evaluation of boronated compounds for neutron capture therapy (NCT) is the need to know the intraor extracellular microdistribution of boron. This is a consequence of the short range of the '°B(n,a)7Lireaction products (-10 urn), such that biological efficacy is dependent upon intracellular distribution. In partic ular, if boron location is predominantly extrac...

Cells of the mucosal mast cell line, RBL2H3, are normally stimulated to degranulate after aggregation of high affinity receptors for IgE (FceRI) by soluble cross-linking ligands. This cellular degranulation process requires sustained elevation of cytoplasmic Ca 2÷. In this study, we investigated the response of RBL-2H3 cells to 6-p~m beads coated with IgE-specific ligands. These ligand-coated b...

In this study, the efficient phosphate utilizing isolates were used to remove phosphate from synthetic phosphate wastewater was tested using batch scale process. Hence the objective of the present study was to examine the efficiency of bacterial species individually for the removal of phosphate from synthetic phosphate wastewater. The most efficient phosphate reducers were isolated and screened...

Bacteriophage λ protein phosphatase (λPP) is a member of a large family of metal-containing phosphoesterases, including purple acid phosphatase, protein serine/threonine phosphatases, 5′-nucleotidase, and DNA repair enzymes such as Mre11. λPP can be activated several-fold by various divalent metal ions, with Mn2+ and Ni2+ providing the most significant activation. Despite the extensive characte...

In this study, the efficient phosphate utilizing isolates were used to remove phosphate from synthetic phosphate wastewater was tested using batch scale process. Hence the objective of the present study was to examine the efficiency of bacterial species individually for the removal of phosphate from synthetic phosphate wastewater. The most efficient phosphate reducers were isolated and screened...