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Influence of form and quantity of selenium on the development and survival of an insect herbivore
1998
Trumble, J.T. | Kund, G.S. | White, K.K. (Department of Entomology, University of California, Riverside, CA 92521 (USA))
Trace elements in striped dolphins (Stenella coeruleoalba) from the western Mediterranean
1998
Monaci, F. | Borrel, A. | Leonzio, C. | Marsili, L. | Calzada, N. (Dipartimento di Biologia Ambientale, Universita degli Studi di Siena, via delle Cerchia 3, 53100 Siena (Italy))
Multitracer Study on Absorption of Radionuclides in Atmosphere-Plant Model System
1998
Shinonaga, Taeko | Ambe, Shizuko
The absorption of atmospheric radionuclides by soybean plants was experimentally studied using a radioactive multitracer consisting of radionuclides of Sc, Mn, Co, As, Se, Rb, Sr, Y, Eu, Gd, Yb, Hf, Re, and Ir. The soybean plants were cultivated in soil under no-rain conditions in a box containing air in which multitracer-absorbed cellulose particles were dispersed. The soil was covered with plastic film. After about one-month cultivation, the plants were harvested and washed with dilute HCl solution. The leaves, stems, and beans were subjected to γ-ray measurement. The radionuclides of As, Se, and Re were accumulated in the leaves, and those of Co, Se, and Rb were accumulated in the beans. Among them Se was accumulated to a large extent in the leaves and in the beans. Small amounts of the radionuclides of Co, Se, Rb and Re were found in the roots. Little absorption of these radionuclides into the soil occurred. These results indicate that various radionuclides in the atmosphere were absorbed through the soybean leaves and then transported to the seeds. These findings must be taken into consideration for a complete understanding of the system of uptake of radionuclides by the soybean plant.
显示更多 [+] 显示较少 [-]Mercury pollution and the Saimaa ringed seal (Phoca hispida saimensis)
1998
Hyvarinen, H. | Sipila, T. | Kunnasranta, M. | Koskela, J.T. (Department of Biology, University of Joensuu, P.O. Box 111, FIN-80101 Joensuu (Finland))
Inhibition of chlorophyll synthesis and enzymes of nitrogen assimilation by selenite in excised maize leaf segments during greening
1998
Jain, M. (Devi Ahilya Univ., Indore (India). School of Biochemistry) | Gadre, R.P.
