著者
赤井 純治
出版者
日本宇宙生物科学会
雑誌
Biological Sciences in Space (ISSN:09149201)
巻号頁・発行日
vol.14, no.4, pp.363-371, 2000
被引用文献数
2

Recently, there is strong interest on microbe - mineral interactions. This is related also to recent expanded knowledges on extremely severe environments in which microbes live. Interaction between microbes and minerals contains biomineralization processes. Varieties of biomineralization products are found not only in various geologic materials and processes in the earth's history but also in present surface environments. Some hot springs represent such environments similar to those of unique and extremely severe environments for life. In this short review, the author briefly shows some examples of biomineralizations at some hot springs and mineral springs, Japan . In such environments, iron ore was formed and some varieties of growing stromatolites were found. The varieties of stromatolite are siliceous, calcic and manganese types. Cyanobacteria and the other bacteria are related to form the stromatolite structure. In the Gunma iron ore, sedimentary iron ores were mineralogically described in order to evaluate the role of microorganisms and plants in ore formation. The iron ore is composed of nanocrystalline goethite. Algal fossils are clearly preserved in some ores. Various products of biomineralization are found in the present pH 2-3, Fe<SUP>2+</SUP>- and SO<SUB>4</SUB><SUP>2-</SUP> - rich streams. Bacterial precipitation had variations from amorphous Fe-P-(S) precipitates near the outlet of mineral spring, to Fe-P-S precipitates and to Fe-S-(P) precipitates. Mosses and green algae are also collecting Fe precipitates in and around the living and dead cells. The Gunma Iron Ore can be said as Biologically Induced Iron Ore. At Onikobe and Akakura hot springs, growing stromatolites of siliceous and calcareous types, were found, respectively. At Onikobe, The stromatolites grow especially near the geyser. Cyanobacterial filaments in stromatolite were well preserved in the siliceous and calcic stromatolites. The filaments oriented in two directions which form the layered structures were found. At Yunokoya hot spring, black and brittle stromatolitic structures which were composed of amorphous Mn minerals are growing. The form of these structures are hemispherical. Many bacteria that were coated with amorphous Mn minerals were found on these structures. Furthermore, Precambrian ( Proterozoic : Wittenoom- Chichester region, western Australia) manganese stromatolite was briefly shown in comparison. The black stromatolite has been clarified to be composed of todorokite. Small spotty and donuts-like shaped todorokite aggregates which are very similar to biologically induced Mn-precipitates were found in massive dolomite layers.
著者
堀田正敦 編
出版者
巻号頁・発行日
vol.[297],
著者
謝 卓峰
出版者
九州大学
巻号頁・発行日
1990

博士論文
出版者
日経BP社
雑誌
日経ビジネス (ISSN:00290491)
巻号頁・発行日
no.919, 1997-12-08

噂を否定するために、金融機関が東京証券取引所などで相次いで会見した。異様な光景は、恐慌寸前の金融市場がどういうものかを金融関係者に思い知らせた。 三洋証券、拓銀に続いて、山一証券の経営破綻が表面化した11月24日以降の1週間、市場では金融機関のありとあらゆる噂が飛び交ったのである。
巻号頁・発行日
vol.第85冊, 1000
著者
田中 桂子
出版者
The Japan Lung Cancer Society
雑誌
肺癌 (ISSN:03869628)
巻号頁・発行日
vol.51, no.2, pp.131-134, 2011

肺癌患者では,特に疼痛・呼吸困難など難治性の苦痛症状が生じやすく,緩和医療・緩和ケアの果たす役割は大きい.以下の5つのキーワードをもとに緩和医療の現状を概説する.(1)がんになったら緩和ケアも:緩和ケアとは,病気の進行度とは関係なく症状やニーズがあれば提供されるべきものである.(2)がん難民をなくすために:がん専門病院・一般病院,在宅,緩和ケア病棟のどこでも緩和ケアが受けられ,スムーズに選択でき行き来できるような地域のネットワーク作りが重要である.(3)「その人らしさ」を支えるために:終末期において大切なことは人により様々である.インフォームド・コンセントから一歩進んで,インフォームド・チョイスの提供が求められる.(4)緩和ケアを「広げる」・「深める」ために:緩和ケアの均てん化のための研修会やガイドラインの普及,専門化のためのシステム作りが進んでいる.(5)緩和ケアを「つなげる」ために:身体面・精神面・社会面・スピリチュアルな面を含むがん患者のトータルペインには,医師・看護師・薬剤師・栄養士・リハビリ職・心理職・ソーシャルワーカーなど,多職種合同チームによるアプローチが重要である.<br>

1 0 0 0 OA 栄花物語 40巻

巻号頁・発行日
vol.三十三、三十四, 1600
著者
元闕名撰
出版者
葉氏觀古堂刊
巻号頁・発行日
vol.[3], 1908

1 0 0 0 OA 群書類従

出版者
巻号頁・発行日
vol.第138-140,