| JaLCDOI | 10.18926/15789 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_19_1_53.pdf |
| Author | Korenaga Takashi| Moriwake Tosio| Takahashi Teruo| |
| Abstract | Three methods for determining chemical oxygen demand (COD) by means of flow injection analysis (FIA) with potassium permanganate, potassium dichromate, or cerium(IV) sulfate as oxidant, developed in this laboratory, are described from the point of view of their operating properties. The permanganate method is the most sensitive and common, but forms manganese(IV) oxide precipitate which blocks the FIA lines and connectors. Addition of phosphoric acid in the reagent system is, however, effective to some extent in order to avoid blocking the flow system. The dichromate method is the most workable and stable, but produces toxic wastes containing chromium(VI). The cerium method is the most probable because cerium(IV) is the strongest oxidant of the three and less poisonous. The last method with cerium(IV) sulfate is therefore recommendable to apply to the continuous monitoring of COD in many situation. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1984-11-26 |
| Volume | volume19 |
| Issue | issue1 |
| Start Page | 53 |
| End Page | 62 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307292 |
| JaLCDOI | 10.18926/15787 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_19_1_45.pdf |
| Author | Oda Kiichi| Yoshio Tetsuo| O-oka Kazuo| |
| Abstract | Succeeding to 60(Ba,Sr)TiO(3)-10A1(2)O(3)-30SiO(2)glassceramics reported in our previous paper, another type
of ferroelectric glass-ceramics was elaborated by the
controlled growth of Ba(l-x)Ca(x)TiO(3) crystal particles in the glass system 60 (Ba(l-y)Ca(y)) TiO(3)-10Al(2)O(3)-30SiO(2) (0.0 |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1984-11-26 |
| Volume | volume19 |
| Issue | issue1 |
| Start Page | 45 |
| End Page | 51 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307972 |
| JaLCDOI | 10.18926/15785 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_19_1_33.pdf |
| Author | Taniguchi Takeo| Soga Akira| |
| Abstract | Numerical error in the solution of the band matrix method based on the elimination method in single precision is investigated theoretically and experimentally, and the behaviour of the truncation error and the roundoff error is clarified. Some important suggestions for the useful application of the band solver are proposed by using the results of above error analysis. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1984-11-26 |
| Volume | volume19 |
| Issue | issue1 |
| Start Page | 33 |
| End Page | 44 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307352 |
| JaLCDOI | 10.18926/15783 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_19_1_13.pdf |
| Author | Nago Hiroshi| Maeno Shiro| |
| Abstract | In this paper the theoretical method to analyse the pore water pressures in the sand bed under the oscillating water pressure is developed. In the former researchs the validity of the theoretical treatment for the one-dimensional problem has been verified. However, the one-dimensional treatment is not sufficient to obtain the precise informations concerning the many practical problems. From this point of view, in this study, we derive the fundamental equations for the general three-dimensional sand layer under the oscillating water pressure. The validity of this theoretical method is verified by experiments for the twodimensional problems. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1984-11-26 |
| Volume | volume19 |
| Issue | issue1 |
| Start Page | 13 |
| End Page | 32 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307347 |
| JaLCDOI | 10.18926/15781 |
|---|---|
| FullText URL | Mem_Sch_Eng_OU_19_1_1.pdf |
| Author | Totsuji Hiroo| |
| Abstract | Emission and absorption coefficients of bremsstrahlung by high-temperature partially degenerate electrons are calculated for high-density plasmas where Coulomb coupling between ions is not weak. It is shown that the ion correlation substantially reduces these coefficients. |
| Publication Title | Memoirs of the School of Engineering, Okayama University |
| Published Date | 1984-11-26 |
| Volume | volume19 |
| Issue | issue1 |
| Start Page | 1 |
| End Page | 12 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002307955 |
