能登半島地震前後の環境放射能の変動 (<特集>2007年能登半島地震 その2)

金沢大学環日本海域環境研究センターVariations of radiation levels before and after the Noto Hanto Earthquake in 2007 have been analyzed from the point of view of environmental radioactivity. The 210Pb activities in the airborne particles are collected from Nishi-Futamata in Wajima, are analyzed. The Radon activity at Hegura Island located 50km North of Wajima, and the spatial gamma rays at Nishi-Futamata are measured since April 21, 2007. Abnormal increase of 210Pb activity started 3 weeks before the earthquake are found, suggesting the maximum value just before the earthquake, because it decrease to normal level after 2 weeks. Increase of radon level was not observed at Hegura Island, however, increase of radiation level at Nishi-Futamata area continued for 6 weeks after the earthquake, and settled to normal level in middle of May 2007.環境放射能の観点から能登半島地震発生前後の放射能関連のデータの解析を試みた.解析したのは,輪島市西二又地区で採取した大気浮遊塵中の210Pb,輪島沖50kmに位置する舳倉島のラドン濃度,地震発生後の4月21日から西二又地区で連続測定を実施した空間γ線レベルの3項目である.その結果,地震発生約3週間前から大気浮遊塵試料のラドンの娘核種210Pbの濃度が増加し,地震直前にピークに達した後に低下に転じ,約2週間後にほぼ平常値に回復していたことが分かった.舳倉島のラドンには地震の影響は見られなかったが,西二又における空間γ線レベルはラドンに由来すると考えれる高い値が約6週間後も続き5月中頃に平常値に戻ったことが明らかになった

Expression of basic fibroblast growth factor and its receptor in human pancreatic carcinomas

金沢大学医薬保健研究域医学系We examined the expression of basic fibroblast growth factor (FGF) and FGF receptor by immunohistochemistry in 32 human pancreatic ductal adenocarcinomas. Mild to marked basic FGF immunoreactivity was noted in 19 (59.4%) of the 32 tumours examined, and 30 (93.3%) of the tumours exhibited a cytoplasmic staining pattern against FGF receptor. The tumours were divided into two groups according to the proportion of positively stained tumour cells: A low expression group (positive cells ≪ 25%) and a high expression group (positive cells > or = 25%). No statistically significant difference in tumour size, differentiation, metastases or stage was found between the low and high basic FGF expression groups. However, a significant correlation was found between FGF receptor expression level and the presence of retroperitoneal invasion, lymph node metastasis, and tumour stage. In addition, low FGF receptor expression was significantly associated with a longer post-operative survival as compared with high FGF receptor expression, whereas there was no significant difference in post-operative survival between the low and high basic FGF expression groups. Increased expression of FGF receptor is correlated with the extent of malignancy and post-operative survival in human pancreatic ductal adenocarcinomas. Thus, overexpression of FGF receptor may prove to be a more useful prognostic marker than basic FGF expression level in pancreatic cancer patients. © 1995 Stockton Press. All rights reserved.Embargo Period 12 month