Yasuhiko Kamiyama

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This study was designed to determine the effect of water-immersion-restraint stress (WIRS) and pretreatment by reduced glutathione on both the production of gastric mucosal lesions and the content of gastric mucosal phosphatidylcholine hydroperoxide (PCOOH). Sprague-Dawley rats were divided into control and treatment groups (treated with reduced glutathione(More)
p < 0.05). Among TNM stage III patients, a significant difference in survival was observed between surgical bypass associated with IORT and bypass alone ( p < 0.05); the median survival time of the IORT group was 10 months, whereas that of the control group was 5 months. In addition, HFS of 3 months or longer was achieved in 83.3% of patients who underwent(More)
The patient was a 68-year-old woman who had cecal cancer with para-aortic lymph node metastases. Ileocecal resection was performed palliatively. Since metastasis to cervical vertebrae was detected after the operation, she received radiation therapy of 14 Gy to improve neck pain. Chemotherapy with TS-1 (80 mg/day) was started on an outpatient basis (4 weeks(More)
On the assumption that the ulcerogenesis in Crohn's disease is closely linked with intestinal ischemia, we studied the pattern of vascular reaction of resected specimen using the technic of histometry. The atrophy of media in peripheral arterioles, indicating the presence of ischemia was notable not only in Crohn's disease but also in other benign bowel(More)
The purpose of this article is to (1) define M(t, k) the t-fold center of mass arrangement for k points in the plane, (2) give elementary properties of M(t, k) and (3) give consequences concerning the space M(2, k) of k distinct points in the plane, no four of which are the vertices of a parallelogram. The main result proven in this article is that the(More)
Fix integers k and t . The t–fold center of mass arrangement M(t, k) for integers t with k ≥ t ≥ 1 is defined as the subspace of the k–fold product Ck given by ordered k–tuples of points (x1, . . . , xk) such that the centroids of any set of t elements in the underlying set {x1, . . . , xk} σt(xi1 , xi2 , . . . , xit ) = (1/t)(xi1 + xi2 + · · ·+ xit ) are(More)
Let Ck(C) denote the configuration space of unordered k–tuples of distinct points in C. The study of the topology of Ck(C) originated in [1]. For that purpose, Arnol’d performed an induction for Pk,n with making k larger and l smaller while n being fixed. Then one obtains information on Pk,n for all k , n and l. In particular, setting n = 2 and l = 0, we(More)
LetM n,r be the configuration space of planar n-gons having side lengths 1, . . . , 1 and rmodulo isometry group. For generic r, the cohomology ringH(M n,r ;Z 2 ) has a formH(M n,r ;Z 2 ) = Z 2 [R(n, r), V 1 , . . . , V n−1 ]/I n,r , where R(n, r) is the first Stiefel-Whitney class of a certain regular 2-cover π : M n,r 󳨀→ M n,r and the ideal I n,r is in(More)
The purpose of this article is to (1) define M(t, k) the t-fold center of mass arrangement for k points in the plane, (2) give elementary properties of M(t, k) and (3) give consequences concerning the space M(2, k) of k distinct points in the plane, no four of which are the vertices of a parallelogram. The main result proven in this article is that the(More)