摘要:

Like in other European countries, due to the accident at the Chernobyl nuclear power plant in 1986 the radioactive contamination level of the biological chain increased significantly in Hungary. The external and internal dose burden had a low-dose effect on plants ranging within the dose internal of stimulation and thus exhibiting a biopositive influence on the physiological functions.

ISSN:0021-1915    

DOI:10.1080/10256018908624190

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

Für die Ermittlung der Transferkoeffizienten im System Boden–Pflanze wurden in drei Stellen der Tschechoslovakei Boden- und Pflanzenproben entnommen. Die niedrigsten Transferkoeffizienten für Getreide und für mehrjährige Futterpflanzen wurden in der Ostslovakei festgestellt. Die Werte der Transferkoeffizienten waren durch den Bodentyp, den Gesamt-Sorptionskapazität und dem Grad der Sorptionssättigung beeinfluβt.

ISSN:0021-1915    

DOI:10.1080/10256018908624193

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

Interelement effects can be of great significance in the outcome of the analytical results from X-ray fluorescence technique. In an attempt to obtain rapid and accurate quantitative analysis a simple mathematical correction computer program is described with the aid of three different practical examples, namely steel 1, steel 2 and standard rock samples. The approach described in this study requires a minimum number of standards and can be run in any personal computer. The analytical values obtained by utilizing this program are within the accuracy level accepted by conventional techniques.

ISSN:0021-1915    

DOI:10.1080/10256018908624194

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

Olive oil and its main constituent, oleic acid, have been labelled with125I using chloramine-T (CAT) as an oxidizing agent. The maximum yields of labelling in different organic solvents were found to vary between 10 to 50% for oleic acid. The values for olive oil were 70% of those of oleic acid. The labelled compounds were stable in allorganic solvents except for acetone where they start to decompose after 20 min of starting the experiments. The low yields could be attributed partly to a possible labelling of CAT or to the reaction of CAT with labelled compounds or their precursores.

ISSN:0021-1915    

DOI:10.1080/10256018908624195

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

The decay of140La to levels in140Ce has been studied in detail using a GMX-Ge and Hp-Ge coincidence spectrometer. Singles gamma-ray spectra as well as gamma-gamma coincidence were carried out to determine some γ-transitions and to insure others. Energies and relative intensities of 36 γ-transitions in the range from 26 to 3319 keV have been measured. The doubted γ-lines 936.7, 1087.9, 1303.5, 1404.2, 1415.3 and 2533.4 keV were confirmed, while other ones at 798.3, 902.0, 907.0, 1521.8 and 2494.0 keV were not observed. The two γ-lines at 1924 and 2082 keV which were a source of large discrepancies in the previous studies are confirmed in the present work to be sum peaks. Special care was paid in identifying the weak γ-transitions 936.7, 1087.9, 1415.3 and 2533.4 keV.

ISSN:0021-1915    

DOI:10.1080/10256018908624196

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

Radiolysis of aqueous solution of tri- and tetravalent cerium-nitrilo-tri-acetate complexes were studied both in the presence and in the absence of oxygen. A radiolytic mechanism has been proposed and discussed in which it is shown that the radiolytic degradation of the chelate is due to the OH radical, while radiolytic oxidation of trivalent cerium chelate to tetravalent cerium chelate, at alkaline pH, is due to hydrogen peroxide.

ISSN:0021-1915    

DOI:10.1080/10256018908624197

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

Extensive measurements have been carried out on cellobiose and cellulose molecules in the solid state comprising infrared and electronic absorption spectra both before and after exposure to an absorbed energetic γ-ray dose (3.0 × 103rad). These materials were chosen as representatives of di- and polysaccharides. They have hydrogen bonding of variant origins as they have cyclic structures and the magnitude of γ-radiation damage were evaluated in each case. Gamma radiolytic oxidation mechanism was established for both di- and poly-saccharides investigated.

ISSN:0021-1915    

DOI:10.1080/10256018908624198

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

Aggressive liquids are often stored and transported in plastic vessel, tanks or tubes in chemical industry. Such plastic material is exposed to both mechanical and chemical stress. This stress causes penetration of liquids into plastics. Penetration of some liquids was studied by means of autoradiography. A special device was developed for the study of penetration of aggressive liquids into plastics under stress. This device and results of measurements of such penetration are described. It is shown that penetration occurs through microsplits in the studied system.

ISSN:0021-1915    

DOI:10.1080/10256018908624199

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

To get information about the transport mechanisms of impurities or dopants in the liquid zone for the crucibleless zone melting method of crystal growth the boron distribution was studied in Ge-single crystals using neutron induced autoradiography on solid state nuclear track detectors. The boron distribution found for a cover-free surface of the zone was proved to be caused by non-stationary thermocapillary (Marangoni) convection. The Marangoni convection could be suppressed by a viscous oxide layer on the zone.

ISSN:0021-1915    

DOI:10.1080/10256018908624200

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor

摘要:

Polyvinylalcohol (PVA) was treated by different weights of ZnCl2ranging from 5 to 30%, wt., and then hydrolysed with KOH where KOH/ZnCl2equals to 1 or 2 molar. The electrical conductivity and activation energy δE of the treated films were determined at different temperatures and dosages of γ-radiation. The obtained results were discussed on the basis of ion conduction mechanisms. The electrical conductivity behaviour of γ-irradiated samples was attributed to degradation and dissociation of macromolecular polymer due to the effect of γ-irradiation.

ISSN:0021-1915    

DOI:10.1080/10256018908624201

出版商:Taylor & Francis Group    

年代:1989

数据来源: Taylor