Length of Corolla as an Indicator of the Most Effective Period for Prebloom GA Treatment of Muscat Bailey A and Delawere Grapes

ブドウに対するGA前処理の適期を判定するためには,花器の発達程度を知ることが重要である. そこで,マスカット・ベーリーAとデラウェアについて,処理適期における花らい各部の大きさと処理効果との関連性を調査した. 1)マスカット・ベーリーＡ10園で調査したGA処理適期における平均花冠長は,いずれも2.0～2.2mmの範囲内で,適期の2,3日前または後には1.6～1.9mm,及び2.3～2.5mmとなり,いずれも適期における値とは有意の差があった. 2)同一のベーリーA樹につき,3年連続して適期における新梢と花器の発達を調査した結果,花冠長は新梢長や展葉数にくらべて,年次による相違が少なかった. 3)デラウェアについても同様の傾向が認められ,加温園1か所を含む5園における処理適期の花冠長は1.8～2.0mmであった. 1.6mm以下または2.1mm以上の時期に処理すると,ばら房になったり,有種子果粒が混入した. 4)以上の結果及び測定が容易であることから,花冠長はGA処理適期を判定するための有効かつ実用的な指標であると考えられる

Regardation of the Secondary Growth of Lateral Shoot and Stimulation of the Development of Inflorescence Primordia by CCC Spray after the Harvest Time of Neo Muscat Grapes in a Heated Plastic Greenhouse

欧州系ブドウ,ネオ･マスカットを12月または1月からハウス内で加温促成すると,翌年は花穂を持たない新梢が多く発生することが多い. 収穫期後（7月上旬）に腋芽中の花穂原基を無加温樹の同時期（9月上旬）のものと比べると,翌年の結果枝となるはずの基部の芽の花穂原基数が少なく,その発育程度も劣っていた. 加温樹では,その後秋までの数カ月間に旺盛な2次生長をしたが,CCCを葉面散布しておくと著しく抑えられ,冬季せん定時における花穂原基数もやや増えていた. CCCを散布した主枝では. 翌春の発芽新梢数が多く,それらの花穂着生率も高かった

Global Recognition of Qualified Toxicologic Pathologists: Credential Review as a Potential Route for Recognizing the Proficiency of Pathologists Involved in Regulatory-type Nonclinical Studies*

Recent international summits of the International Federation of Societies of Toxicologic Pathologists (IFSTP) have debated the desirability and potential means by which the proficiency of an individual toxicologic pathologist might be recognized and communicated throughout the world. The present document describes the advantages and disadvantages of implementing such a global recognition system by any means, and provides a proposal whereby recognition might be accorded via rigorous credential review of a practitioner’s education and experience

GLUTATHIONE S-TRANSFERASE PLACENTAL FORM IS A MARKER FOR BILE DUCT CARCINOMA, BUT NOT HEPATOCELLULAR CARCINOMA, IN HUMANS.

Immunohistochemical studies using anti-human glutathione S-transferase placental form (GST-π) rabbit antibody were carried out to investigate various hepatobiliary diseases in humans. Hepatocytes in fetal and adult liver without disease were negatively or positively stained while intra-or extrahepatic bile duct epithelial cells were positively or strongly positively stained with GST-π. Hepatocytes in regenerated nodules in liver cirrhosis were positively stained. Hepatocellular carcinomas were not strongly positively stained, while cholangiocarcinomas and cancers of the biliary tract were positively or strongly positively stained. These results indicate that GST-π staining is a useful marker for the diagnosis of intra-or extra-hepatic bile duct carcinomas in humans, and that enzyme activity is not phenotypically expressed in hepatocellular carcinomas

MALIGNANT ONCOCYTOMA OF THE PARANASAL SINUS

A case of malignant oncocytoma developing in the paranasal sinus of a 37-year-old Japanese man with a habit of heavy smoking is described. The primary tumor was found in the right maxillary sinus with local invasion to the nose and right ethmoidal sinus ; it was composed of nests of large oncocytic cells, with finely granular and eosinophilic cytoplasm, nuclear pleomorphism and prominent nucleoli, surrounded by proliferation of spindle-shaped cells in some areas. Electron microscopically, the cytoplasm of oncocytic tumor cells was characterized by abundant mitochondria, and immunohistochemical investigation revealed positive binding for antibodies to S-100 protein and α₁-antitrypsin, but a negative reaction for both cytokeratin and vimentin. At autopsy, metastatic nodules of tumor in the lungs, liver and pancreas independently exhibited both oncocytic cell- and sarcomatous cell compartments. This phenomenon is rare, and to the authors' knowledge, this would be histologically an ususual report of malignant oncocytoma with sarcomatous metastatic nodules arising from the paranasal sinus to be described in the literature