1 ヒガシ ナンキョク ヤマト サンミャク ノ チケイ ニツイテ ダイ4ジ エットウタイ ヤマト サンミャク チョウサ リョコウ ホウコク ヨホウ

1960年11月1日から12月15日にわたって,昭和基地南西約300kmにあるやまと山脈への旅行が第4次越冬隊によって行なわれ,大陸氷および山地の氷河学,地質学,地理学的調査が行なわれた.これらの成果は現在整理中であるが,山脈の地形の概略を報告する.やまと山脈はほぼ南北に連なる7群の山塊群からなり,東南東より流下する大陸氷は,これに阻げられて停滞し,山群間を破る溢流氷河によって西北方へと氷を排出している.山地はいずれもこれらの氷河群と,大陸氷から独立した圏谷氷河,谷氷河によって氷蝕を受けた典型的な氷蝕地形をなしている.山塊郡は地形的にも2つの弧をなし,西側へ張り出した6群の山塊による弧と,その東側の1つの山塊及び数個のnunatakからなる弧とが雁行している.山脈の南方には数個のnunatakないしは山塊があって,氷堤(大陸氷が氷崖を作って段をなしている)をもって内側の弧に連なっている.やまと山脈は花崗岩,花崗片麻岩等の深成岩体よりなるが,これらの地質構造は前述の弧状構造をよく示し,地形に大きな影響を与えている.第四紀以降の氷床の後退は山地の各所にその証拠を止めていて,後退の種々のstageが観察されるが,これらを大観してみれば,後退は北ほど進行しており,かつ現在もなお後退を行なっていると言うことができる

Physiography of the Prince Olav and the Prince Harald Coasts, East Antarctica (Earth Sciences)

The author describes the physiography of the Prince Olav and the Prince Harald Coasts and discusses the geomorphic development of the coastal and the inland icefree areas of the region based mainly on field surveys arid air-photograph interpretation. The Yamato Mountains are situated inland about 300 km away from the coast and consist of seven small massifs and some 20 nunataks with maximum elevation of 2490 m above sea level. They were once covered completely with the former ice sheet. The fall of the ice level revealed the glaciated topography including at least two cirques which had been formed by mountain glaciation prior to inundation of the former ice sheet. The trace of erosion by the wet-based ice sheet is found on a part of the bedrock. In the retreat of the ice from the highest to the present levels, three stages can be recognized ; the Yamato, the Fukushima, and the Meteorite Glacial Stages for the maximum, intermediate, and near past to present standstills of the ice sheet. During the ice retreat outlet glaciers and detached ice masses fed partly by drifted snow modified the topography of the presently ice-free areas. In the coastal region, the ice sheet retreated from the edge of the continental shelf prior to 30000 years before, leaving the glaciated ice-free areas on the present coast. Areal scouring of the former ice sheet produced the undulating surfaces with subsequent features controlled by geologic structures on the preglacially existed subdued topography. Selective linear erosion also cut the surface to produce precipitous cliffs and U-shaped valleys both in the ice-free areas and on the sea floor. Crooked glacial grooves and related minor topography suggest the erosion by the wet-based former ice sheet. Raised marine features after glaciation and radiocarbon dates give the information of crustal movement in time sequence

The Emergence of Insects from Dying Pine Trees

1977年5月初め実験室内に持ち帰ったマツの枯死木からの昆虫群集の羽化状況を調べた. 秋には枯れが目立たず,年を越してから枯死したマツからはマツノマダラカミキリは羽化してこなかった. シラホシゾウムシ一種,ヒメムツテンチャタテ,キイロホソナガクチキムシ,マツノマダラカミキリ,ヒゲナガモモブトカミキリ,ムナクボサビカミキリの6種の羽化曲線を示した. 1977年度の岡山のマツノマダラカミキリの羽化期は例年よりやや遅れていたと考えられる. マツノマダラカミキリの羽化虫数は,マツの樹幹の地上からの高さのちがいによって異なり,地上3～4mの高さの樹幹から最も多く羽化した

Positron emission tomography in ovarian cancer: 18F-deoxy-glucose and 16α-18F-fluoro-17β-estradiol PET

The most frequently used molecular imaging technique is currently 18F-deoxy-glucose (FDG) positron emission tomography (PET). FDG-PET holds promise in the evaluation of recurrent or residual ovarian cancer when CA125 levels are rising and conventional imaging, such as ultrasound, CT, or MRI, is inconclusive or negative. Recently, integrated PET/CT, in which a full-ring-detector clinical PET scanner and a multidetector helical CT scanner are combined, has enabled the acquisition of both metabolic and anatomic imaging data using one device in a single diagnostic session. This can also provide precise anatomic localization of suspicious areas of increased FDG uptake and rule out false-positive PET findings. FDG-PET/CT is an accurate modality for assessing primary and recurrent ovarian cancer and may affect management. FDG-PET/CT may provide benefits for detection of recurrent of ovarian cancer and improve surgical planning. And FDG-PET has been shown to predict response to neoadjuvant chemotherapy and survival in advanced ovarian cancer. This review focuses on the role of FDG-PET and FDG-PET/CT in the management of patients with ovarian cancer. Recently, we have evaluated 16α-18F-fluoro-17β-estradiol (FES)-PET, which detects estrogen receptors. In a preliminary study we reported that FES-PET provides information useful for assessing ER status in advanced ovarian cancer. This new information may expand treatment choice for such patients