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

PSEUDOMONAS CICHORII SWINGLE1925 STAPP1928ニ ヨル メボウキ コクハンサイキンビョウ シンショウ ニ ツイテ

2003年10月千葉県千倉町のビニルハウス栽培メボウキの葉,葉柄および茎に黒色水浸状斑および黒色条斑を形成し,ついには枯死する病害の発生を認めた。被害部からは細菌のみが分離され,分離菌はその病原性,細菌学的性質,血清学的性質からPseudomonas cichorii(Swingle1925)Stapp1928と同定された。P. cichoriiによるメボウキの病害は,わが国未報告であることから,病名を黒斑細菌病(英名 ; Bacterial black spot)とすることを提案した。In October, 2003, a new bacterial black spot disease was found on basil (Ocimum basilicum L.) in Chiba prefecture, Japan. This disease was characterized by the formation of irregular shaped brownish-black spots or streaks on the leaves, petioles and stems. Bacteria isolated from disease tissues produced black spots and streaks similar to natural infection on the basil by spray inoculation method. The causal bacterium was identified as Pseudomonas cichorii (Swingle 1925) Stapp1928 based on pathogenicity, bacteriological and serological characteristics. Bacterial disease of basil caused by P. cichorii has not been recorded in Japan. Therefore, we proposed the name "bacterial black spot" for this disease