Japanese Journal of Oral and Maxillofacial Surgery
Online ISSN : 2186-1579
Print ISSN : 0021-5163
ISSN-L : 0021-5163
Volume 38, Issue 1
Displaying 1-23 of 23 articles from this issue
  • Shigeaki TORATANI
    1992 Volume 38 Issue 1 Pages 1-10
    Published: January 20, 1992
    Released on J-STAGE: September 13, 2011
    JOURNAL FREE ACCESS
    I have studied photodynamic therapy on human cancer cells for the purpose of applying the therapy to the treatment of oral cancer.
    It was shown that pheophorbide-a (Ph-a) and hematoporphyrin derivative (HpD) had a strong killing action on culture cells using together with irradiation of light.The killing action of Ph-a was stronger than that of HpD.
    Moreover, it was revealed that Ph-a and HpD were taken in the cell by passive transport and were localized mainly in mitochondria.
    It was suggested that the killing mechanisms of photodynamic therapy resulted in the production of singlet oxygen.Furthermore, the growth of squamous cell carcinomas transplanted in nude mice were significantly suppressed by photodynamic therapy using Ph-a and Hp-D. Especially, the suppressive action of Ph-a was remarkable.
    Thus, these results strongly suggested that photodynamic therapy using a new photosensitizer, pheophorbide-a, would be a useful for cancer treatment.
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  • Electron microscopic observation
    Yoshinori JINBU, Yoko AKASAKA, Kaichi SAITO, Shigeaki KOTO, Tsuneo TAK ...
    1992 Volume 38 Issue 1 Pages 11-14
    Published: January 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    In order to characterize the molecular mechanism of blister formation of oral mucosa in pemphigus vulgaris (PV), we observed the effects of PV serum on the arrangement of keratin intermediate filaments (KIFs) and desmosomes of cultured human gingival keratinocytes by transmission electron microscope.
    The arrangement of KIFs in contol cells showed a radiating pattern of filament bundles to the cell periphery, and these bundles ended at well developed desmosomes.After incubation with PV serum for 96 hrs at 37°C, the arrangement of bundles of KIFs became unclear and the number of desmosomes decreased, and amorphous dotted structures were observed.
    These dotted structures seemed to be formed by structural changes of KIFs and these structures were often associated with distrupted desmosomes.These results support our hypothesis that PV serum induces structural changes in KIFs and also in desmosomes.
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  • Recovery of bone mineral in the mandibular bone defect of dogs
    Tomomoto HASHIBA, Shigenobu SATO, Taketoshi SAKAOKA, Kojiro IWASAKI, H ...
    1992 Volume 38 Issue 1 Pages 15-22
    Published: January 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    A study was carried out by dual energy X-ray absorptiometry in the bone defects of sixteen beagles to determine the bone mineral content (BMC) and density (BMD) of the mandibular premolar region. Both shallow and deep defect groups which were obtained from the excised mandibles were measured on the onset as well as the 4th, 8th, and the 24th weeks after the operation. These were then compared with the values obtained by the intact opposite side to confirm the bone recovery rate.
    In the shallow bone defect group, the ratio of BMC to control decreased gradually from 95.1% to 82.4% over a period of 24 weeks, then the BMD ratio showed almost equal quantities of the control at all times. In the deep bone defect group, the BMC ratio increased from 52.4% to 89.8% in the first 4-week interval, followed by a decreasing change that resulted in 82.7% at the 24 weeks. The BMD ratio of the deep defects increased from 82.5% to 97.6% in the first 4 weeks, and thereafter that showed the same level as the control side.
    The bone mineral change was influenced by the depth of bone defects. BMC was a sensitive parameter to the regeneration of the bone defects, however, BMD was affected by only the deep defects. At the end of the observation period, BMC of both shallow and deep defects showed a regular level in contrast to the control side.
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  • Koichi RIKIMARU, Hiromi MASUHARA, Hitomi TODA, Shoji ENOMOTO, Masaru N ...
    1992 Volume 38 Issue 1 Pages 23-29
    Published: January 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Human epidermal growth factor (hEGF), which is functionally indistinguishable from murine EGF, is a potent mitogen for many types of cells and found in human tissues and body fluids, and the amount of its receptor (EGF·R) has been revealed to be elevated in human squamous cell carcinomas (SCC) including oral cancer. In order to investigate the role of hEGF and overexpressed EGF·R in the carcinogene sis of SCC, we examined the effects of hEGF on the growth of tumors implanted in athymic mice as well as in vitro. Although hEGF suppressd the in vitro growth of A 431 and ZA cells in a dose dependent manner, which were SCC cells hyperproducing EGF·R accompanied with its gene amplification, their growth in athymic mice was not affected by hEGF administered intraperitoneally. On the other hand, hEGF did not inhibit the growth of AZ521 cell either in vitro or in vivo, which was gastric cancer cell line used as a control. These results suggest that the roles of hEGF in vivo differ from it in vitro or that there may be an alternate growth mechanism via EGF·R on SCC cells.
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  • Mitsuhiro HIROTA
    1992 Volume 38 Issue 1 Pages 30-40
    Published: January 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    In order to investigate permissive concentrations of dimethyl sulfoxide (DMSO) as a solvent of teratogenic reagents in rat whole-embryo culture system, 9.75-day-old embryos with their visceral yolk sac were cultured for 1 or 2 days in rat serum containing 0 (control), O.125, O.25 and 0.5% DMSO, and the development of embryos and their tissues as well as visceral yolk sac, were macro-and microscopically examined.
    Macroscopically, the values such as diameter of visceral yolk sac, crown-rump length, head length and number of somites were evidently lower in the embryos cultured with the serum containing more than 0.25% DMSO than in the embryos cultured with the serum of 0.125% DMSO. The incidence of embryos displaying failure of neural tube closure, abnormal axial turning and maxillary hypoplasia as well as mandibular swelling was much higher in the high concentration (0.25-0.5%) of DMSO than in the lowc oncentration (0.125%). In addition, in the former groups vascular formation did not occur anywhere in the visceral yolk sac.
    Microscopically, in the embryos of 0.25% and 0.5% DMSO groups, numerous degenerating cells characterized by the increased electron density, disappearance of polysomes and formation of autophagosomes were found throughout the intraembryonic tissues. The endodermal cells of the visceral yolk sac exhibited many lipid droplets and dilatation of Golgi apparatus.
    Judging from these findings, DMSO should be used as a solvent in the concentration of less than 0.125% in the rat whole-embryo culture system.
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  • Histological findings of the tissue reaction after installation of a hydroxylapatite ceramics
    Tatsuo SHIROTA, Kohsuke OHNO, Kanako SUZUKI, Osamu MIYAMOTO, Yoshiro M ...
    1992 Volume 38 Issue 1 Pages 41-47
    Published: January 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    The purpose of this study was to investigate the effect of aging on the healing process afterinstallation of hydroxylapatite (HA) implant into bone tissue. Three groups of eight male Wistar rats, aging 6 weeks (Young group), 12 weeks (Adult group), and approximately two years (Old group) were used in this experiment. Two implants were installed into the rats tibiae bilaterally. The animals were sacrificed 7, 14, 28, and 56 days after the installation, and 15μm hematoxvlin-eosin stained undecalcified sections were prepared. The healing processes were examined histologically.
    In the Young group, new trabecular bone was formed actively around the HA implant, and good HA-bone bonding was achieved rapidly compared to the Adult group. In the Old group, both the quantity of newly formed trabecular bone around the implant and the extent of HA-bone bonding were less than in the other groups. These results suggested that the activity of new bone formation after implantation declines with increasing age. Therefore, it is concluded that aging has disadvantages in the achievement of good HA-bone bonding.
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  • Hiroaki OMATA, Yoshiko MOCHIZUKI, Akio UDA, Jun SHIBUTANI, Yoshiaki AK ...
    1992 Volume 38 Issue 1 Pages 48-52
    Published: January 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Ampicillin (ABPC) is widely used prophylactically and in the treatment of infection. When ABPC is administered for prophylaxis of postoperative infection, the target tissue is subjected to a surgical damage. Since the damaged tissue by surgery is different from the normal tissue, the distribution of ABPC might be affected. Thus, the present investigation was undertaken to compare between the ABPC concentrations in damaged tissue and normal tissue, using incised skin asa damaged tissue and untreated skin asa normal tissue. Pharmacokinetic analysis was also performed to show numerical differences of ABPC concentrations between incised and untreated skins.
    Wistar strain SPF male rats, 12-weeks old, were used. Ampicillin·Na (ABPC·Na, 100mg/kg) was administered intravenously. Rat head skin was incised immediately after administration of ABPC·Na.Specimens of incised skin (surgical tissue) and untreated skin (normal tissue), were collected at O.25, O.50, O.75, 1.0, 1.5, 2.0, 3.0, 4.0, 6.0 and 8.0 hours after administration of ABPC·Na.Blood samples were also taken at the those times. ABPC concentrations in serum and the skins were assayed by a paper disk method. The pharmacokinetic analysis was performed to compare the ABPC concentrations in serum and incised and untreated skins.
    The results are as follows:
    1. The concentration of ABPC in serum at O.25 hours after administration was 132.20±14.33μg/ml. ABPC level was rapidly deceased during O.25 to 1.0 hours after administraion, and then gradually decreased to reach 0.09±0.07μg/ml at 8.0 hours.
    2. ABPC concentrations in all incised skins were continually higher than those of the corresponding untreated skins (t-test, p<0.10).
    3.K13/V and K31 of incised skin weresmaller than those of untreated skin, and AUC of incised skin was larger. Reasonable differences between incised and untreated skins could be also shown by the pharmacokinetic parameters.
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  • Lianq-Horng CHEN, Sadami TSUTSUMI, Wen-Hsi CHEN, Yukitada HYO, Tadahik ...
    1992 Volume 38 Issue 1 Pages 53-59
    Published: January 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    A non-contact, rapid, and automatic system for three dimensional measurement of the human face by utilizing a new optical cutting method was developed.
    The system includes:
    1.The multi-slit laser array was devised to minimize the scanning time, while the accumulating optical cutting image technique was to reduce the memory size.
    2.The illumination intensity center of each slitrimage was detected to generate the space coordinates;moreover, quadratic form was applied to correct coordinate values.
    With this system, the whole face can be recorded within six seconds and reconstruct a 3-D image in approximately four minutes.The accuracy of this apparatus was confirmed to be within 0.4% error for the view of 250mm in height and 200mm width.
    From these results, this system is considered useful in clinical human face measurement.
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  • On the forearm vessels
    Harunobu SHIMA
    1992 Volume 38 Issue 1 Pages 60-76
    Published: January 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Clinicoanatomical observations were made of forearm vessels that are important to vascular anastomosis of a free forearm flap. Results of these observaticns are reported. This study included morphological and morphometrical examinations of superficial vein variations, confluence of radial and ulnar vein variation, radial artery orgin, cutaneous branches of the radial artery, inner diameters of the vessels and venous valves in forearm vessels from 52 cadavers. The following results were obtained:
    1. Morphological examination: 1) Type I (the cephalic vein runs in a proximal direction outside of the radial artery and has a projection, the median cubital vein) account for 81.3%. 2) Type II (two radial veins and two ulnar veins join to form two brachial veins) account for 70.0%. 3) Most valves were Bicuspid. 4) Venous valves appeared most often at confluences.
    2. Morphometric examination: 1) Inner diameter of superficial veins measured using vascular anastomosis was2.0±1.5mm in A (cephalic veins 5cm proximal from the interepicondylar line), 3.2±1.3mm in B (basilic veins 5cm proximal from the interepicondylar line), 1.9±1.2mm in C (cephalic veins at the interepicondylar line), 1.8±1.1mm in D (median cubital veins at the interepicondylar line. 2) Inner diameter of venae comitantes measured using vascular anastomosis was 1.6±0.5mm. 3) Inner diameter of the radial artery measured using vascular anastomosis was 2.3±0.5mm. 4) The maximum length of superficial veins that could be used as vascular pedicles was28.7±4.6cm. 5) The maximum length of radial artery could be used as a vascular pedicle was 18.1±1.7cm. 6) In individual cases, there were no significant differences in vessel inner diameters or lengths between right and left sides.
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  • Hiroshi NIKI
    1992 Volume 38 Issue 1 Pages 77-88
    Published: January 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    Single irradiation for the submandibular glands of rats was performed at dose levels of 10 Gy and 30 Gy to study the changes following irradiation in the weight of the glands, the tissue blood flow, histopathology and to evaluate the vascular structure of the microcirculation after 30 Gy.
    The decrease in percentage weight of the submandibular glands in rats was 9.9%for 10 Gy and 20.3% for 30 Gy at 2 weeks following irradiation (p<0.01). It was 21.3% and 45.2%respectively at 3 months after (p<0.01).
    The tissue blood flow in the submandibular glands showed relative increases at 3 days and 1 and 2 weeks after irradiation in both the 10 Gy and 30 Gy groups, with peak values seen 1 week after irradiation. Thereafter the values decreased after 3 months following irradiation, there was a decrease of 4.7% in the 10 Gy group, but 27.1% in 30 Gy (p<0.001).
    Regarding histopathological changes of the submandibular glands in both the 10 Gy and 30 Gy groups, regressive changes progressed with time and 3 months after irradiation, atrophy of acinar cells and enlargement of the striated portion cells, fibrosis crevice between the acinic, around the excretory ducts and the blood vessels were observed.
    The vascular structure of the submandibular gland microcirculation after 30 Gy showed leakage of blood components from the vessels and sporadic destruction of the blood vessels as initial changes. In the course of time, the blood vessels became thinner, decreased in number and no vascularization was noted.
    From a comparative study of the above results, it was evident that (1) dose-dependent regressive changes with time are seen in the submandibular gland tissue with no sign of recovery when the submandibular, glands are irradiated with X-rays at a dose of at least 10 Gy, and (2) there is a close correlation between the degree of destruction of the microcirculatory system and the decrease in tissue blood flow. Therefore, if the degree of damage of the submandibular gland tissue is determined by measurement of the tissue blood flow in the submandibular glands, this should be effective for the improvement and maintenance of the oral cavity environment toprevent rampant caries.
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  • Yasuhiro OZAWA
    1992 Volume 38 Issue 1 Pages 89-106
    Published: January 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    inducing substance (cortical bone factor: CBF) extracted from bovine bone matrix was implanted into the femoral muscle of a mouse to make morphological observation of the osteogenetic induction process.The following results were obtained;
    1. Three days after CBF implantation, fibroblasts were proliferated around implanted CBF, seven days after the implantation undifferentiated mesenchymal cells were accumulated, and ten days thereafter the cartilage was formed.Fourteen days after the implantation resorption of the cartilage and addition of the new bone began with fibrous tissue and blood vessels being penetrated therein.Twenty one days post operatively, uneven bone was formed and bone marrow with sinusoidal capillaries was seen.This indicated the process of endochondral ossification. Twenty eight days after the implantaion, taking the form of the medulla and round cortical bone surrounding the medulla just as the long bone was cut crosswise, bone marrow gradully became so-called lipomedullary, but thirty five days thereafter, no great change was noticed.
    2. Three days after CBF implantation, myofibrous interfascicular connective tissue of the thigh showed 3H-thymidine-marked cell rate of 11.7±1.4%for fibroblasts compared with 28.3±0.8% for those around the implanted CBF.
    3. 35S-microautoradiogram seven days after CBF implantation revealed undifferentiated mesenchymal cells accumulated in the site of CBF implantation and the most grains accumulated thereabout;ten days after the implantation, chondrocytes and surrounding substrates showed grain accumulation, but not fourteen days thereafter.
    4. von Kossa staining indicated that calcification began with perichondro-matrix, then the added new bone.
    The above results revealed that CBF caused induction of the cartilage, followed by osteogenesis with endochondral ossification.
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  • Kazuhiko SUGANO, Yukihiro TATSUHARA, Satoru NISHIMURA, Teruhiko ISHII, ...
    1992 Volume 38 Issue 1 Pages 107-113
    Published: January 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    We reported three cases of lymphoepithelial cyst which arise on the base of the tongue.These cases were three females of 44, 50, and 54 year olds.Histological examination of all three cases exhibited representative lymphoepithelial cyst.The cyst was lined with squamous epithelium, and lymphoid tissues with particular germinal center appeared beneath the lining epithelium.
    Immunohistochemical analysis for the lymphoid tissues revealed that T cells existed in the cystic wall and mantle zone of the lymphoid follicle, while B cells mainly accumulated in the germinal center.A large number of immunoglobulin containing cells were found between the lining epithelium and follicles, which IgG containing cells were seen most frequently. Anti-lysozyme positive cells were found just under the epithelium.These results suggest that an antibody production of lymphocytes occured directly against localized antigens from lumen or secondary infection.
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  • Toshikazu TOKUOKA, Saburo KAKUTA, Masao NAGUMO
    1992 Volume 38 Issue 1 Pages 114-118
    Published: January 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    As we experienced a rare case of large epulis fibrosa osteoplastica which arose from the upper jaw of a 35 year-old male, we studied biologically and morphologically using this epulis.The tumor, 30×20×20 mm in size, located in the muco-gingival region of the bridge (765) and connected with a stalk to alveolar gingiva under the dummy of the bridge.Radiograph revealed radiopaque spots which indicated the existence of calcified substances.The tumor was surgically removed and investigated both morphologically and biochemically.
    The histopathological findings showed that there were immature woven bones surrounded by osteoblasts and prominant proliferation of fibrous connective tissue between epithelium and woven bones.Biochemical studies demonstrated that acid soluble calcium and phosphorus contents were relatively high corresponding with the region of bone formation. At this region alkaline phosphatase activity and inorganic phosphorus ion were also increased.These results suggest that the woven bones in epulis are calcified, and that both the increases of alkaline phosphatase activities and inorganic phosphorus ion contents may contribute to the onset of calcification.
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  • Masanori KUGA, Masahiro UMEDA, Yoshiaki TAKE, Satoshi YOKOO, Akiteru O ...
    1992 Volume 38 Issue 1 Pages 119-126
    Published: January 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    A clinicopathological study was made of squamous cell carcinoma of the floor of the mouth treated at Department of Maxillofacial Surgery, Kobe University School of Medicine between 1980 and 1989, and the following findings were obtained.
    1.There was distinct male predominance in the patients.
    2.TNM classification was as follows;Ti: 26%, T2: 57%, T3: 4%, T4: 13%, and NO: 30%, N1: 26%, N2: 44%.
    3.The anterior or antero-posterior portion was the most common site of carcinoma of the floor of the mouth.
    4.Interstitial irradiation was performed in six patients, and local cure was obtained in all of them.
    5. Two of eleven patients who underwent operation had local recurrence in soft tissue. There was no correlation between preoperative clinical or histological findings and local recurrence.
    6. Histological examination revealed that level I neck was at greatestrisk of nodal metastases, and often bilateral nodes were involved.
    7. Classical or modified radical neck dissection was undergone for node metastases. Out of 10 patients (15 necks) who had histologically proven neck metastases, one patient died of neck disease.
    8. 5-year survival rate was 63.6% in the patients who underwent the operation, and 83.3% in those who had interstitial irradiation.
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  • Hiroyuki KAI, Youichi YAMASAKI, Sadako KAI, Hideo TASHIRO
    1992 Volume 38 Issue 1 Pages 127-137
    Published: January 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
    The effects of methods which were intended to reduce the anteriorly displaced disc and to maintain it in the correct position were investigated for young patients under 19 years of age with the anteriorly displaced disc of the temporomandibular joint (TMJ).Seventeen patients were treated by means of an occlusal splint only, 5 prosthodontic treatment following splint therapy, and 4 Bionator following splint therapy.Those patients were observed for more than 6 months.Discs in 10 patients of anterior displacement were reduced by mandibular manipulation before various treatments.The results were as follows;
    1. Splint
    All cases were treated with anterior repositioning splints.Although the effectiveness was observed concerning the pain at the affected joint, there were no cases whose disc was still reduced when the splint was removed.
    2. Prosthodontic treatment following splint therapy
    There were 2 cases whose disc was completely reduced and 3 cases whose reduced disc was displaced again after the prosthodontic treatment.
    3. Bionator therapy following splint therapy
    There was decrease in over jet and over bite owing to the increase in the vertical occlusal height in all 4 cases.The complete reduction of the disc was achieved in three cases upon removal of a Bionator and one side in a bilateral case.There was no recurrence of pain of the joint and masticatory muscles or displacement of the disc.
    Although it was considered that splint treat ment is effective to eliminate pain and reduce the disc while the splint was applied, it seems necessary for the following final occlusal reconstruction after splint therapy to prevent recurrence of displacement.The cause of the recurrence of displacement in prosthodontic cases was thought to be the disharmony between the occlusion and the function of the TMJ and it seems difficult to determine the occlusion by irreversible prosthodontic treatment during the growing stage in young patients.
    On the other hand, Bionator resolved pain at the TMJ and masticatory muscles, and maintained the proper position of the disc.It is thought that the Bionator can change the occlusion continuously utilizing the inherent eruptive force of the teeth in young people in harmony with the function of the TMJ. Furthermore, it seems to direct the disturbed dento-maxillary development by various methods toward the proper one.
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  • Hisashi YABUUCHI, Katsuhiro HORIUCHI, Akinobu HATTORI, Kohji MOCHIZUKI ...
    1992 Volume 38 Issue 1 Pages 138-139
    Published: January 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
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  • Noboru HAYASHI, Hirohisa OKAMURA, Hisao TANAKA, Kiyohiro OGOH, Masaki ...
    1992 Volume 38 Issue 1 Pages 140-141
    Published: January 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
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  • Kazuhiko TAKAYA, Kouichi KIMURA, Toshio TSUSHIMA, Yoshio ONO, Kentarou ...
    1992 Volume 38 Issue 1 Pages 142-143
    Published: January 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
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  • Kotaro KURODA, Hiroyuki ABE, Hiroshi TOMA, Takashi YAMAMOTO, Kiyomi TA ...
    1992 Volume 38 Issue 1 Pages 144-145
    Published: January 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
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  • Takeshi NAKASHIMA, Tadahiro NODAI, Nagayoshi YAMADA, Hiroshi FUKUYAMA
    1992 Volume 38 Issue 1 Pages 146-147
    Published: January 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
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  • Morio TONOGI, Hiroyasu NOMA, Takashi TAKAKI, Akira KATAKURA, Takeo SHI ...
    1992 Volume 38 Issue 1 Pages 148-149
    Published: January 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
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  • Takeo SHIOZAKI, Hiroyasu NOMA, Yoshito TAKASAKI, Kenichi HATADA, Akira ...
    1992 Volume 38 Issue 1 Pages 150-151
    Published: January 20, 1992
    Released on J-STAGE: July 25, 2011
    JOURNAL FREE ACCESS
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  • 1992 Volume 38 Issue 1 Pages 181-213
    Published: January 20, 1992
    Released on J-STAGE: July 25, 2011
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