Papillary adenoma of the duodenum; report of a case and review of the literature in Japan.

A papillary (villous) adenoma of the duodenum was found in a 67-year-old male. Radiographic barium studies of the upper gastrointestinal tract revealed a tumor in the second portion of the duodenum. Biopsied specimens taken through a duodenofiberscope showed papillary adenoma. A partial duodenectomy with duodenojejunostomy was performed. The specimen was a pedunculated tumor measuring 3 X 2 X 1.5 cm. Histologically, the tumor was composed of villous and tubular arrangements of mucus-secreting columnar epithelial cells. A moderate number of entero-endocrine cells and a few Paneth cells were also noted. Forty-two other cases reported in Japan are briefly reviewed.</p

核 g- 因子測定用電磁石に対する磁気遮蔽の効果(A. 理学)

角度相関法により原子核の励起状態のg-因子を測定するための電磁石のコイルの外側に, 厚さ約3mmの純鉄製の磁気遮蔽を取り付けた場合の効果を調べた。磁極間隙の磁場の強さを22kGにした場合に, 磁極の中心から20cm離れた位置での漏洩磁場の強さは2Gとなり, これは磁気遮蔽を取り付けない場合の約1/10にあたり, 3″×3″Na I (Tl)を装着した光電子増倍管に適当なパーマロイ・シールドをほどこせば, ライトパイプ無しで実用できるだけの遮蔽効果を得た

The Internal Magnetic Field at Mercury Nucleus in Fe-Au Alloy (A. NATURAL SCIENCE)

The shift of the angular correlation of 675Kev-412Kev gamma-gamma cascade in Hg^ was measured by utilizing the high internal magnetic field at mercury nucleus in iron host material of alloy magnetized up to saturation. The value of the internal magnetic field at mercury nucleus in 2AT.% Fe-Au alloy was determined to be |H|=(0.83±0.35)×10^6 gauss

Ti^<46> の角度相関に於ける減衰(A. 自然科学)

The directional correlation between the 1.119 Mev gamma ray and the 0.887 Mev gamma ray in Ti^ has been studied. The experimental data agree well with a theoretical curve for the 4(Q)2(Q)0 sequence. The attenuation of the angular correlation coefficient in our measurement is not so marked as to explain that experienced by F. Boehm and J. Rogers in their measurement of the beta-gamma circular polarization correlation on the same isotope

The Measurement of β-γ Directional Correlation in ^<122>Sb and the Excited States in ^<122>Te (A. NATURAL SCIENCE)

The decay of ^Sb has been investigated by using Ge (Li) solid state detector. There was no evidence for the existence of the 1090keV level of ^Te from γ-ray spectra. The β-γ directional correlation of the first-forbidden nonumique transition leading to first excited state of ^Te has been measured. The angular correlation coefficient A_ (ω) varies from 0.049±0.006 to 0.007±0.025 as the β energy increases from 0.75MeV to 1.25MeV. The results are consistent with the prediction of ξ approximation. Modified B_ approximation was used to investigate the structure of the first excited state of ^Te. Three configulations (g7/2)^4 (h11/2)^v, (g7/2)^π (h11/2)^4,(g7/2)^π (h11/2)^6 are not inconsistent with the experimental data

マルチチャネル フォトンカウンティング システム ニヨル キュウチャク ルミネッセンス ノ ケイソク

放射線照射されていない固体において, 表面へのガス吸着に起因する熱ルミネッセンスを生じる現象(吸着ルミネッセンス)について調べた。BaSO_4 : Eu粉末への水, エタノール, アセトン等の蒸気の吸着によるルミネッセンスは, Eu^の励起準位からの緩和発光による615nmの線スペクトルと可視全域に広がる帯スペクトルとから成り, 線スペクトルと帯スペクトルの強度比および帯スペクトルの形状は吸着種に依存して異なる。吸着ルミネッセンスにおよぼす履歴効果と, ルミネッセンススペクトルの温度依存, 雰囲気変化に対する過渡応答等について計測した。The thermoluminescence of unirradiated solids originated from adsorption of gases (adsorption thermoluminescence) has been examined. The luminescence of BaSO_4 : Eu phosphors results from the adsorption of water, ethanol and acetone vapor. The luminescence has a main line spectrum at 615nm and a sub band spectrum ranging from 400 to 700nm. The main line spectrum corresponds to the de-exitation emission of Eu^, whereas the sub band spectrum does not appear in normal thermoluminescence. The ratio of the intensity of the main and sub spectrum and/or the structure of the band spectrum are dependent on adspecies. Sustained emission is observed when the vapor of these organic solvents are introduced into synthesized air. These observations suggest that the measurement of adsoption luminescence spectrum may realize the analysis of environmental gases. The effect of the sample history on adsorption thermoluminescence, the temperature dependence of the luminescence spectrum and the transient response of the luminescence to alterations in the gas environment are measured. It may be concluded that the adsorption thermoluminescence which appeared for samples stored in the atmosphere results from the recombination radiation between electrons trapped into the surface states originated from chemisorbed water and free holes released from the surface states originated from chemisorbed oxygen