result 9304 件
| JaLCDOI | 10.18926/19612 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_33_1_39.pdf |
| Author | Munesawa, Yoshiomi| Osaki, Hirokazu| Kajihara, Yasuhiro| |
| Abstract | In this paper, we propose a recognition index to evaluate the complexity of discrimination among parts and units. The parts and units are classified into some groups (the number of groups is shown as n) by one characteristic, such as color, shape, size and so on. The recognition index of each is denoted as log(2) (n+1) by the information quantity formula. The recognition diagram shows the classfication of parts and units into only one part and unit by the structure of a characteristic. Further we propose the line balancing method for assembly line based on the working time and recognition index. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1998-11-30 |
| Volume | volume33 |
| Issue | issue1 |
| Start Page | 39 |
| End Page | 45 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002309042 |
| JaLCDOI | 10.18926/19610 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_33_1_31.pdf |
| Author | Iwamoto Hidehisa| Osaki, Hirokazu| Kajihara, Yasuhiro| Munesawa, Yoshiomi| Hashimoto Atsufumi| Seki, Shuji| |
| Abstract | The nurse supporting robot system to prepare and hand surgical instruments to a surgeon is proposed to reduce work of nurse in a surgical operation. In this paper, the surgical instrument recognition system (SIRS) is developed to hand the surgical instruments to a surgeon by the robot. The characteristics ot the instruments are area of the instruments, ratio of minimum center-contour distance to maximum one and its outline contour, are recognized by using the image processing. Kinds of the instruments are distinguished by these characteristics. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1998-11-30 |
| Volume | volume33 |
| Issue | issue1 |
| Start Page | 31 |
| End Page | 37 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002309084 |
| JaLCDOI | 10.18926/19608 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_33_1_19.pdf |
| Author | Washio, Seiichi| Takahashi, Satoshi| Imoto, Chikashi| Yoshida, Atsumasa| |
| Abstract | The present paper deals with measurements of the diffusion coefficients as well as the saturated solubilities of single component gases such as N(2), O(2) and CO(2) to a mineral oil. The method to determine the diffusivity is based upon measuring the pressure changes caused by the one-dimensional diffusion between the gas and the oil enclosed in an airtight container. For N(2) and O(2) the profiles of the measured pressure changes agree well with those predicted by diffusion theory, whereas that is not the case with CO(2). Although the reason why CO(2) does not seem to obey diffusion theory has yet to be studied, it may suggest the possibility that the diffusion coefficient varies with the pressure, considering that the range of pressure change in the diffusivity measurement was much obtained by this method fell within ±30% around the average. Moreover the solubility measurements have made clear that Henry's law holds true between the three pure gases and the oils tested, and that O(2) and CO(2) dissolve into the oil approximately two and ten times more, respectively, than N(2). |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1998-11-30 |
| Volume | volume33 |
| Issue | issue1 |
| Start Page | 19 |
| End Page | 30 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002309030 |
| JaLCDOI | 10.18926/19607 |
|---|---|
| Title Alternative | EFFECT OF WATER LEVEL OF RIVER ON MINERAL SPRING (Continued) |
| FullText URL | 015_011_015.pdf |
| Author | Umemoto, Shunji| |
| Abstract | From February to September 1954, observations were made of the rates of flow and the water temperatures at a spring called "Tanaka-no-Yu", Misasa Hot Springs, Tottori Prefecture. Simultaneously with these observations, the water level of the River Misasa and that of an irrigation stream nearby were also determined. The procedures for the observations were the same as in the previous report. Comparing the results here obtaind wite those previously obtaind, and referring to the conclusions in the previous report, the author has been led to the following conclusions. From the observations in the period from February to September, 1954, as from those in the period from June, 1953 to January, 1954, a positive correlation was found between the rate of flow and the water teperature, the correlarion coefficient being 0.828 (highly significant). The analsis of variance of the obseryed results showed that the rate of flow and the water temperature appear to be affected by the water levels of the River and of the irrigation stream, and also by their interaction. This conclusion supports what was deduced in the previous report. The average water levels of the River and of the irrigation stream, the average rates of flow and the average water temperatures, for the period from June to September in 1953, were compared with those for the period from June to September in 1954. The differences in the average water levels of the River, the average rates of flow and the average water temperatures are significant; while that in average water levels of the stream is not significant. From this it may be concluded that the increase in the rate of flow and the rise of the water temperature were resulted from the upheaval of the water level of the River, which followed the construction of a dam there. |
| Publication Title | 岡山大学温泉研究所報告 |
| Published Date | 1955-03-25 |
| Volume | volume15 |
| Start Page | 11 |
| End Page | 15 |
| ISSN | 0369-7142 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002309149 |
| JaLCDOI | 10.18926/19606 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_33_1_5.pdf |
| Author | Abe, Takeji| Namikoshi Ryuji| Nagayama Noriyuki| Takano Yasuju| |
| Abstract | The influence of the slip between the inclusion and the matrix during the plastic deformation of inhomogeneous material with elliptic inclusions is investigated. The material is assumed to be rigid-plastic. The boundary slip region is modeled by assuming lower yield stress for the thin boundary region than those of the inclusion and the matrix. The rigid-plastic finite element method is used for the numerical calculation under the plane strain condition. The effects of the aspect ratio of the inclusion, the yield stress of the boundary region, and the volume fraction of the inclusion on the deformation mode are studied. The patterns of the strain concentration and the averaged flow stress of the inhomogeneous material are also discussed. The results may be helpful for understanding creep or superplastic deformation of metals with inclusions. |
| Keywords | Plasticity Composite Material Sliding Inclusions Rigid-Plastic Deformation Finite Element Method |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1998-11-30 |
| Volume | volume33 |
| Issue | issue1 |
| Start Page | 5 |
| End Page | 17 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002309204 |
| JaLCDOI | 10.18926/19605 |
|---|---|
| Title Alternative | STUDIES ON CHLORIDE AND SULFATE CONTENT OF WELL WATERS AND THE AMOUNTS OF CHLORIDE AND SULFATE FIXED TO SOIL IN THE MINERAL SPRING DISTRICTS (X) MATSUZAKI, TOGO AND ASOZU HOT SPRINGS AND HAMAMURA AND KACHIMI HOT SPRINGS (Continued) |
| FullText URL | 015_006_010.pdf |
| Author | Umemoto, Shunji| |
| Abstract | At Matsuzaki, Togo and Asozu Hot Springs and at Hamamura and Kachimi Hot Springs, the amounts of chloride and sulfate fixed to soil were determined with samples which were colleted from various parts of the thermal spring zone and its outside area, more than ten days after rainfall, so as to eliminate its possible effect. The amounts of sulfate were determined by terbidimetry with BaCl(2) solution and those of chloride were determined by mercuric thiocyanate method. In the average amounts of chloride and sulfate, no differences were found between the samples collected from the thermal spring zone and its outside area. The same fact was described in the 5th and 8th reports, but errorneously ascribed to an effect of rainfall. From the present study it has been ascertained that the fact is independent of rainfall. |
| Publication Title | 岡山大学温泉研究所報告 |
| Published Date | 1955-03-25 |
| Volume | volume15 |
| Start Page | 6 |
| End Page | 10 |
| ISSN | 0369-7142 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002309043 |
| JaLCDOI | 10.18926/19604 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_33_1_1.pdf |
| Author | Sakakibara, Akira| Kanadani, Teruto| |
| Abstract | Aging of diolute Al-Ag alloys after quenching from low temperatures were studied mainly by electrical resistometry. Maximum resistivity observed in the aging curve of specimens quenched from high temeperature disappeared when the quenching temperature was lowered to 473 or 453K. When the quenching temperature was lowered further to 423K or lower, however, maximum resistivity reappeared. At the temperature lower than or equal to 423K but higher than the GP zone solvus, the alloys were not homogeneous but had clusters of solute atoms or fluctuation of solute concentration. Inhomogeneous distribution of solute atoms may affect the aging behavior after quenching from that temperature. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1998-11-30 |
| Volume | volume33 |
| Issue | issue1 |
| Start Page | 1 |
| End Page | 4 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002309092 |
| JaLCDOI | 10.18926/19603 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_31_2_67.pdf |
| Author | Li Zhenzi| Osaki, Hirokazu| Kajihara, Yasuhiro| |
| Abstract | In this paper, we propose the price determination method using the parameter of the price elasticity that shows the relation between price and demand. Firstly, the state of the price elasticity is examined under the condition that the relation between price and demand are assumed by the inverse proportional function, the linear function and the quadratic function. Secondly, the profit is estimated for each product by break even point analysis. And the price is determined under the condition that the relation between the demand and price is shown by one of three demand-pridce functions above mentioned. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1997-03-28 |
| Volume | volume31 |
| Issue | issue2 |
| Start Page | 67 |
| End Page | 72 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002309056 |
| JaLCDOI | 10.18926/19602 |
|---|---|
| Title Alternative | STUDIES ON THE CHLORIDE AND SULFATE CONTENT OF WELL WATERS AND THE AMOUNTS OF CHLORIDE AND SULFATE FIXED TO SOIL IN THE MINERAL SPRING DISTRICTS (IX) SAGINOYU HOT SPRINGS, SHIMANE PREFECTURE, JAPAN. |
| FullText URL | 015_001_005.pdf |
| Author | Umemoto, Shunji| Tanaka, Shigeo| |
| Abstract | At Saginoyu Hot Springs same experiments as those described in previous reports were carried out. Water temperature of Springs is about 50℃. and main constituents dissolved in spring water are calcium sulfate and sodium chloride, its total salt content being 1.5g./ℓ.. Experimental results obtained are shown in the annexed table and map. The results obtained may be discussed in two ways: First, the area marked with ※ is regarded as the spring zone, and a comparison is made by Cochran and Cox's method between this zone and the outside area as to the average contents of chloride and sulfate in well Water, the average water temperatures of well water and the average amounts of chloride and sulfate fixed to soil. The differences in averages of the chloride and sulfate content of well water are significant, while that in average water temperatures is not significant. The differences in the average amounts of chloride and sulfate fixed to soil are not significant. However, the difference in the average amounts of chloride fixed to soi1 is nearly same as that for the 5 % level, and it is seen that the average amount of chloride fixed to soil tends to be higher in the spring zone than in the outside area. Second, the area marked with t is regarded as the spring zone, and a comparison is made in the same way as the above. The differences in the averages of the chloride and sulfate contents and water temperatures of well waters, all being higher in the spring zone, are significant. The differences in average amounts of chloride and Sdlfate fixed to soil are not significant. However, since these differences are nearly same as that for the 5 % level, the average amounts of chloride and sulfate fixed to soil tend to be higher in the spring zone than in the outside area. As the existence of sources which would supply the chloride, sulfate and heat to the water and soil is impossible, the above differences may be due to effects of thermal springs. Since the spring zone may be defined as the zone effected by mineral springs, it is more appropriate to follow the second of the above two ways than to follow the first, and to regard the area marked with t as the spring zone. Then, the differences between the spring zone and the outside area are revealed more remarkably than otherwise. It is an interesing fact that the samples Nos. 3-6, though collected from the spots very near to the springs, do not belong to the spring zone. |
| Publication Title | 岡山大学温泉研究所報告 |
| Published Date | 1955-03-25 |
| Volume | volume15 |
| Start Page | 1 |
| End Page | 5 |
| ISSN | 0369-7142 |
| Related Url | http://ousar.lib.okayama-u.ac.jp/21510 |
| language | Japanese |
| File Version | publisher |
| NAID | 40017532466 |
| JaLCDOI | 10.18926/19601 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_31_2_61.pdf |
| Author | Yamada Mitsuru| Osaki, Hirokazu| |
| Abstract | At present, the two dimensional CAD systems which are used to make drawings go around widely. But in order to use design data at the lower stream of production process, the replacement from the two dimensional CAD systems to the three dimensional CAD systems have started. Accordingly it is dimensional drawings for the three dimensional shapes. And it is also necessary to store them in the three dimensional CAD systems. And in the studying of the machine vision which is often used as "Eyes of robot" , it is being studied the method to recognize the three dimensional objects from the two dimensional image. This is the problem about data exchange, too. Therefore in this report, we propose the method to exchange the plural two dimensional elements of figure from image relations between elements were found from reference of the element coordinates. Next, the three dimensional shapes were reasoned from reference of the knowledge (for corner, etc) prepared beforehand. Then that data were exchanged to the three dimensional CAD data. We report one example about this method. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1997-03-28 |
| Volume | volume31 |
| Issue | issue2 |
| Start Page | 61 |
| End Page | 65 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002309050 |
| JaLCDOI | 10.18926/19599 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_31_2_53.pdf |
| Author | Fujihara Yutaka| Osaki, Hirokazu| |
| Abstract | This paper presents a method using simulated annealing(SA) and genetic algorithm(GA) to solve the plant layout problem in which the layout is evaluated by material handling cost and maintainability. In the former study about facility layout problem, it was either the minimization of the objeective function consisting of transport cost or the maximization of the objective function consisting of closeness rating. In this paper, both transport cost and maintainability were included in the objective function to be minimized. The plant layout problem, this paper proposes the heuristic procedures to obtain a suboptimal layout solution by combining SA with GA. From the simulation by computer, it concluded that the method which SA is combined with GA is more efficient than the method which utilizes SA and GA independently. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1997-03-28 |
| Volume | volume31 |
| Issue | issue2 |
| Start Page | 53 |
| End Page | 60 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002309131 |
| JaLCDOI | 10.18926/19598 |
|---|---|
| Title Alternative | EFFECTS OF RADIO-ACTIVE THERMAL BATH ON OXIDATION- REDUCTION SYSTEM |
| FullText URL | 007_035_081.pdf |
| Author | Sotozono, Masazumi| |
| Abstract | The author proved that consumption of iodate by proteinfree serum filtrate, an index of total reductive substance in serum filtrate, was increased after a radioactive thermal bath of Misasa (400-700×10(-10) Curie units Rn per liter), at a temperature of 40°～45℃ for five minutes. Reduced glutathion in blood showed little change, but oxidized and total glutathion tend to rise and decreased only temporarily. Reduced ascorbic acid in blood and urine increased after the radioactive thermal bath, but the oxidized and total ascorbic acid decreased after a temporal increase. After the thermal. bath a tendency of fall in reduced and oxidized ascorbic acid content was observed in liver, lung, and adrenal glands, and a tendency of rise was shown in kidney, spleen, skin and musclein albino rats. By a series of daily successive thermal baths a fall in ascorbic acid content was observed in most of the organs examined in the first week (on the fourth day) and then a reactive increase was shown during the second week. |
| Publication Title | 岡山大学温泉研究所報告 |
| Published Date | 1952-08 |
| Volume | volume7 |
| Start Page | 35 |
| End Page | 81 |
| ISSN | 0369-7142 |
| language | Japanese |
| File Version | publisher |
| NAID | 40017532419 |
| JaLCDOI | 10.18926/19597 |
|---|---|
| FullText URL | 007_026_034.pdf |
| Author | 外園 正純| |
| Publication Title | 岡山大学温泉研究所報告 |
| Published Date | 1952-08 |
| Volume | volume7 |
| Start Page | 26 |
| End Page | 34 |
| ISSN | 0369-7142 |
| language | Japanese |
| File Version | publisher |
| NAID | 40017532419 |
| JaLCDOI | 10.18926/19596 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_31_2_45.pdf |
| Author | Osaka, Akiyoshi| Kobayashi Keizo| Hayakawa, Satoshi| Ohtsuki, Chikara| |
| Abstract | The thermal expansion coefficient of some bioactive glasses in the system CaO-SiO(2)-B(2)O(3) were adjusted to be similar to that of titanium by controlling the composition. A glass of composition 45CaO･30SiO(2)･25B(2)O(3) was selected among those as the enameling glass. A slurry was prepared by mixing the glass powder and ethanal to be developed on titanium and heated at 740℃ for 30 min. Thus treated specimen was soaked in a simulated body fluid (Kokubo solutiion). FT-IR reflection and thin film X-ray diffraction analyses indicated apatite formation on the glass coating layer within 12 h of soaking in the fluid. Thus titanium could be provided with bioactivity due to the enameling. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1997-03-28 |
| Volume | volume31 |
| Issue | issue2 |
| Start Page | 45 |
| End Page | 51 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002309181 |
| JaLCDOI | 10.18926/19595 |
|---|---|
| Title Alternative | MEDICAL STUDIES ON CHONDROITIN SULFATE (2nd Report) |
| FullText URL | 007_020_025.pdf |
| Author | Oshima, Yoshio| Yokota, Takeo| |
| Abstract | After the internal use of daily 3 grams of crude chondroitin sulfate cholinesterase activity of serum decreased and elimination of glycuronic acid in urine increased, but no definite change in serum mucoprotein level was observed. Mucoprotein in serum showed a positive linear correlation to erythrocyte sedimentation rate, and chondroitin sulfate promoted the e.s.r. in vitro and in vivo. Chondroitin sulfate showed no marked influence on phagocytosis of human leucocytes in vitro, but it promoted the production of agglutinin in rabbits by subcutaneous injection． |
| Publication Title | 岡山大学温泉研究所報告 |
| Published Date | 1952-08 |
| Volume | volume7 |
| Start Page | 20 |
| End Page | 25 |
| ISSN | 0369-7142 |
| language | Japanese |
| File Version | publisher |
| NAID | 40017532418 |
| JaLCDOI | 10.18926/19594 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_31_2_39.pdf |
| Author | Imayoshi Naoki| Hayakawa, Satoshi| Ohtsuki, Chikara| Osaka, Akiyoshi| |
| Abstract | Nb(2)O(5)-and Ta(2)O(5)-doped calcium si1icate glasses were soaked for various periods in a simulated body fluid(Kokubo solution) up to 30 days. Apatite formation ability of the surface of these glasses were investigated with thin-film X-ray diffraction and FT-IR reflection spectroscopy. The effects of these additive oxides on the bioactivity of CaO･SiO(2) based glass were discussed. A small amount of Nb(2)O(5) and Ta(2)O(5) suppressed the rate of silica hydrogel layer formation and the apatite formation on the surface of the glasses. The rate of the apatite nucleation on the surface of Nb(2)O(5)-doped calcium silicate glass was slower than that on the surface of Ta(2)O(5)-doped calcium silicate glass. It was concluded that the decrease in the apatite forming ability of calcium silicate glasses by these additive oxides is attributed to the suppression of formation of silica hydrogel layer which plays an important role in apatite nucleation. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1997-03-28 |
| Volume | volume31 |
| Issue | issue2 |
| Start Page | 39 |
| End Page | 44 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002309151 |
| JaLCDOI | 10.18926/19593 |
|---|---|
| Title Alternative | CHEMICAL STUDIES ON MISASA HOT SPRING (18) A PYRITE-POLYSULFIDE THEORY OF SULFUR SPRING |
| FullText URL | 007_015_019.pdf |
| Author | Ashizawa, Takashi| |
| Abstract | In Misasa there occur only few weak sulfur springs, their maximum hydrogen sulfide content being about 5mg per liter. The ground of Misasa consists of granite and there is no active volcano in the vicinity. So the author tried to explain the mechanism of the occurrence of sulfur spring in Misasa by a reaction of the primarily alkaline thermal water upon pyrite. Namely: XFeS(2) + 3Na(2)C(O)3 = 2Na(2)S(1-5) + Na(2)S(2)O(3) + 3CO(2) + XFeS(1-2) Thiosulfate in sulfur spring waters should not be taken for a secondary product from hydrogen sulfide as accepted generally, but is most probably a primary product to the latter. The phenomenon of white turbidity in sulfur spring is caused mainly by the sulfur liberated from the polysulfide decomposed by the change in pH and temperture of thermal waters and not by the sulfur liberated from the oxidation of hydrogen sulfide. Some experimental data were shown to support the theory． |
| Publication Title | 岡山大学温泉研究所報告 |
| Published Date | 1952-08 |
| Volume | volume7 |
| Start Page | 15 |
| End Page | 19 |
| ISSN | 0369-7142 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002309010 |
| JaLCDOI | 10.18926/19592 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_31_2_29.pdf |
| Author | Oka, Hisao| Ohshima, Masakazu| |
| Abstract | Knee replacement arthroplasty is indicated for the patient with advanced knee pain, knee deformation, and knee functional disorder. The aim of this study was to estimate loosening after a knee replacement arthroplasty. Loosening is measured by a frequency response function, and mobility by random vibration. The modal parameters for the knee joint are obtained by applying a modal analysis to the frequency response function. The values decrease as the knee joint prosthesis loosened. These parameters serve as an index for the condition between a thighbone and the prosthesis. The various indexes will greatly clarify the stage of advance in the loosening of knee-joint prostheses. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1997-03-28 |
| Volume | volume31 |
| Issue | issue2 |
| Start Page | 29 |
| End Page | 37 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002309172 |
| JaLCDOI | 10.18926/19591 |
|---|---|
| FullText URL | Mem_Fac_Eng_OU_31_2_21.pdf |
| Author | Oka, Hisao| Nakamura, Takahiko| |
| Abstract | In evaluating the stiffness of skin surface, internal structures such as bone and muscle often affect the measurements. In the present paper, acoustic random vibration is used to estimated the viscoelasticity of a silicone-gel model. This viscoelasticity, which includes two different stiffness strata, is first estimated using a mechanical impedance spectrum, which describes the relation between the depth and viscoelasticity of internal objects. This method is applied to the depth of a silicone-gel tumor model measured by ultrasound imaging and the viscoelasticity of internal gel can be accurately estimated. |
| Publication Title | Memoirs of the Faculty of Engineering, Okayama University |
| Published Date | 1997-03-28 |
| Volume | volume31 |
| Issue | issue2 |
| Start Page | 21 |
| End Page | 27 |
| ISSN | 0475-0071 |
| language | English |
| File Version | publisher |
| NAID | 120002309105 |
| JaLCDOI | 10.18926/19590 |
|---|---|
| Title Alternative | FLUORINE CONTENT OF THERMAL WATERS IN TOTTORI PREFECTURE AND ITS RELATION TO MOTTLED TOOTH AND GOITER (2nd REPORT) |
| FullText URL | 007_012_014.pdf |
| Author | Onda, Sakue| |
| Abstract | The fluorine content of 67 samples of mineral waters in Misasa, Asozu, Togo, Hamamura, and Iwai Hot Springs was investigated by Zirconium-Alizarine Sulfonate method. It ranged from 1.5 to 15 mg. per liter, 3-6mg. per liter in the majority. Most of the river and well waters in the same districts contained no measurable amount of fluorifle． In Misasa, Asozu, Togo and Hamamura Hot Springs 68-83 per cent of the schoolchildren who take thermal waters habitually as drinking water suffer from mottled tooth. On the contrary 2-10 per cent of the schoolchildren who do not drink thermal waters habitually showed mottled tooth. In Iwai no inhabitant uses thermal water as drinking water, so that the incidence of mottled tooth among them was only 2.8 per cent. Concerning the incidence of struma in the schoolchildren no relationship was proved between the occurrence of mottled tooth or fluorine content of thermal waters. |
| Publication Title | 岡山大学温泉研究所報告 |
| Published Date | 1952-08 |
| Volume | volume7 |
| Start Page | 12 |
| End Page | 14 |
| ISSN | 0369-7142 |
| language | Japanese |
| File Version | publisher |
| NAID | 120002309086 |
