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# | Search | Downloads | ||||
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1 | . // Tomsk State Pedagogical University Bulletin. 1997. Issue 2 (2). P. 20-22 . | 937 | ||||
2 | . // Tomsk State Pedagogical University Bulletin. 1998. Issue 2 (5). P. 62-69 . | 1031 | ||||
3 | . // Tomsk State Pedagogical University Bulletin. 1999. Issue 7 (16). P. 3-7 . | 881 | ||||
4 | . // Tomsk State Pedagogical University Bulletin. 1999. Issue 7 (16). P. 8-12 . | 936 | ||||
5 | The main principles and the development Periodic system of chemical elements have discussioned in the articles a sport description is given an some species Periodic table. The main attention is given the consideration of the best modern form Periodic system, which based on atomic ionization potential and atomic numbers of elements. The problems at the end number of elements at the Periodic table has been considerated. We cannot explain the phenomen today. The problem is suggested for discussion. | 1091 | ||||
6 | Beginning from water systems and soils, all series connection links of this chain can be viewed as deposition or oozing mediums in relation to toxic devices or linkages, in which there is a dynamic balance realized in system uptake - eduction or uptake - accumulation -eduction. | 920 | ||||
7 | Metal traces of chemical fertilizers are the cause of the pollution of the agricultural production. | 1231 | ||||
8 | The soil is traditionally considered as a main source of microelements in the plants, but it is established, that vegetative cover accumulates the considerable part of the fallen dust out of atmosphere, that is why along with the mechanical hoid-up of the aerosols by leaves of the plants it is possible out-rooted penetrance of the big ammountof the vitaly important microelements and heavy metals. The source of the atmospheric microelements can be both Earth's and space substance. | 960 | ||||
9 | The electrochemical properties of sulfur and sulfide mercury en aqueous solvents have been investigated by using voltammetry on mercufy-fiim electrode. The peak of reduction of sulfide mercury in 1 M NaOH and 1 M Na2SO4 is observed at -0.82 ± 0.03 V and 0.80 ± to the reduction of ± 0.01V, the second peak polysulfide ions | 930 | ||||
10 | A method is described for the determination of suifide-ions by cathodic stripping voltammetry at mercury film electrode in 1 M NaOH. The peak height observed at –0,76 ± 0,96 V (saturated silver – chloride electrode) was proportional to the concentration of suifide-ions between 2·10-6 and 1·10-4 M. Tiosulfate - ions do not prevent the determination of sulfide – ions | 1011 |