Transition from an unstable synchronization state with transient oscillation cessations to spiral rotation in a coupled chemical oscillator system

金沢大学大学教育開発・支援センターSpatiotemporal patterns of chemical wave propagation in the assemblies of nine cation-exchange beads loaded with the catalyst ferroin of Belousov-Zhabotinsky reaction are reported. The beads are immersed in the reaction mixture, on which periodic chemical waves are emerged. In the bead assemblies, abrupt changes of initiation site and direction of the periodic chemical waves were observed. In some cases, it was observed that transient oscillation cessations and the following rotating spiral wave occur. © 1997 American Institute of Physics

Surgical Treatment of Pancreatic Cysts: Review of 21 Cases

Twenty one patients with the pancreatic cyst on whom operation was given in our department from 1965 to 1984 were divided into those with the inflammatory cyst (16 cases) and with the neoplastic cyst (5 cases), and the surgical results were examined. The surgical formulas of the inflammatory cyst were further divided into 9 cases of internal drainage of the cyst into the gastrointestinal tract, 1 case of external drainage, and 6 cases of cyst excision together with the resection of the pancreas, and the results were rather satisfactory. On the other hand, the cases of the neoplastic cyst were divided into 2 cases of cystadenocarcinoma, 1 case of cystadenoma and 2 cases of mucinous adenocarcinoma. The contents in the cyst were all mucinous. It is considered that, when the contents of the pancreatic cyst are mucinous, its malignant potential is high. Since examination during operation is often insufficient, we have been trying to recommend resection so far as possible

ERWINIA CAROTOVORA SUBSP. CAROTOVORAニ ヨル ホワイトレースフラワー ナンフビョウ シンショウ ノ ハッセイ ニ ツイテ

2001年10月,千葉県安房郡丸山町でホワイトレースフラワーの茎および葉柄が軟化腐敗し,悪臭を放つ病害の発生を認めた。本病罹病株から分離した細菌は,ホワイトレースフラワー苗を軟化腐敗させた。分離細菌は,グラム反応陰性,通性嫌気性,37℃で発育し,グルコースを発酵的に分解,硝酸塩を還元,ラクトースを利用し酸を産生したが,インドールを産生せず,酒石酸の利用は認めなかった。以上の結果から,本分離細菌をErwinia carotovora subsp. carotovoraと同定し,病名をホワイトレースフラワー軟腐病(英名 ; soft rot)とすることを提案する。On October in 2001, a new rotting disease was found on white lace flower (Ammi majus L.) in Chiba prefecture, Japan. The diseased plant primarily showed water-soaked brown spots on the stem, petioles and leaves near the soil. The diseased tissues were rotten with peculiar odor and the whole of the plant finally wilted. Bacteria isolated from rotten tissues and isolated bacteria produced rotten symptoms on the white lace flower, chinese cabbage and cucumber plants by artificial inoculation. The causal bacterium was identified as Erwinia carotovora subsp. carotovora (Jones) BERGEY et.al. 1923 according to its pathogenicity and bacteriological characteristics. Bacterial disease of white lace flower has not been recorded in Japan, therefore we proposed the name "soft rot" for this disease