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1 0 0 0 OA Spatio-temporal kinematic analysis of shoot gravitropism in Arabidopsis thaliana

著者: Satoru Tsugawa Norihiro Kanda Moritaka Nakamura Tatsuaki Goh Misato Ohtani Taku Demura
出版者: Japanese Society for Plant Biotechnology
雑誌: Plant Biotechnology (ISSN:13424580)
巻号頁・発行日: vol.37, no.4, pp.443-450, 2020-12-25 (Released:2020-12-25)
参考文献数: 10
被引用文献数: 2 4

Plant shoots can bend upward against gravity, a behavior known as shoot gravitropism. The conventional quantification of shoot bending has been restricted to measurements of shoot tip angle, which cannot fully describe the spatio-temporal bending process. Recently, however, advanced imaging analyses have been developed to quantify in detail the spatio-temporal changes in inclination angle and curvature of the shoot. We used one such method (KymoRod) to analyze the gravitropism of the Arabidopsis thaliana inflorescence stem, and successfully extracted characteristics that capture when and where bending occurs. Furthermore, we implemented an elastic spring theoretical model and successfully determined best fitted parameters that may explain typical bending behaviors of the inflorescence stem. Overall, we propose a data-model combined framework to quantitatively investigate shoot gravitropism in plants.

2021-05-19 18:16:45
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1 0 0 0 「取り立て」再考

著者: 藪崎淳子
出版者: 公益社団法人日本語教育学会
雑誌: 日本語教育 (ISSN:03894037)
巻号頁・発行日: vol.166, pp.15-30, 2017

<p> 本稿は,「取り立て」とは何かを再考するものである。「係助詞」「副助詞」という伝統的カテゴリーの別を排し,両者に共通するところを括る「取り立て」は,日本語学だけでなく,日本語教育の分野においても用いられる術語である。しかし,「取り立て」とは何かについて一定の見解はなく,範列関係を表すものを「取り立て」とする立場と,範列関係を表すことに加えて「要素をきわだたせる」ものを「取り立て」とする立場がある。この定義の差によって扱いの異なる,概数を表すグライ・バカリ,順序を表すカラ・マデの検証を通じ,「取り立て」の意味を考える。そして,「取り立て」とは範列関係を表すものであると捉えると,形式間に見られる分類基準の差を解消でき,さらには助詞だけでなく,類義の副詞も含めた「取り立て」形式の体系を成す上でも有意であると主張する。また,本稿の議論が日本語教育にどう関わるのかにも言及する。</p>

2021-05-19 18:13:52
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1 0 0 0 IR 副助詞における程度と取り立て

著者: 丹羽哲也
雑誌: 人文研究 (ISSN:04913329)
巻号頁・発行日: vol.44, no.13, pp.1115-1150, 1992

副助詞には、程度用法aと取り立て用法bを合わせ持つものがある。……

2021-05-19 18:13:51
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https://ci.nii.ac.jp/naid/120006004001

1 0 0 0 OA Development of a dynamic imaging method for gravitropism in pea sprouts using clinical magnetic resonance imaging system

著者: Ryusuke Nakai Takashi Azuma Yosuke Nakaso Shinichiro Sawa Taku Demura
出版者: Japanese Society for Plant Biotechnology
雑誌: Plant Biotechnology (ISSN:13424580)
巻号頁・発行日: vol.37, no.4, pp.437-442, 2020-12-25 (Released:2020-12-25)
参考文献数: 33
被引用文献数: 1 1

Although magnetic resonance imaging (MRI) is a useful technique, only a few studies have investigated the dynamic behavior of small subjects using MRI owing to constraints such as experimental space and signal amount. In this study, to acquire high-resolution continuous three-dimensional gravitropism data of pea (Pisum sativum) sprouts, we developed a small-bore MRI signal receiver coil that can be used in a clinical MRI and adjusted the imaging sequence. It was expected that such an arrangement would improve signal sensitivity and improve the signal-to-noise ratio (SNR) of the acquired image. All MRI experiments were performed using a 3.0-T clinical MRI scanner. An SNR comparison using an agarose gel phantom to confirm the improved performance of the small-bore receiver coil and an imaging experiment of pea sprouts exhibiting gravitropism were performed. The SNRs of the images acquired with a standard 32-channel head coil and the new small-bore receiver coil were 5.23±0.90 and 57.75±12.53, respectively. The SNR of the images recorded using the new coil was approximately 11-fold higher than that of the standard coil. In addition, when the accuracy of MR imaging that captures the movement of pea sprout was verified, the difference in position information from the optical image was found to be small and could be used for measurements. These results of this study enable the application of a clinical MRI system for dynamic plant MRI. We believe that this study is a significant first step in the development of plant MRI technique.

2021-05-19 18:13:17
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1 0 0 0 OA 官報

著者: 大蔵省印刷局 [編]
出版者: 日本マイクロ写真
巻号頁・発行日: vol.1912年06月20日, 1912-06-20

2021-05-19 18:03:01
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1 0 0 0 OA 高ビリルビン血症(9.8mg/dl)を伴った大動脈弁置換術の一例セルセーバーを用いた術中血漿交換の試み

著者: 阿久津博美末定弘行河内賢二清水剛平山哲三石丸新古川欽一
出版者: 特定非営利活動法人日本心臓血管外科学会
雑誌: 日本心臓血管外科学会雑誌 (ISSN:02851474)
巻号頁・発行日: vol.20, no.9, pp.1533-1535, 1991-12-15 (Released:2009-04-28)
参考文献数: 11

術前高ビリルビン血症を伴った42歳男性の大動脈弁狭窄兼閉鎖不全症に対し人工弁置換術とHaemonetics社製Cell Saver 4®を用いた術中血漿交換療法を施行した.人工心肺の回路残血と術野吸引血11,300mlを洗浄処理し210mgのビリルビン除去が可能であった.術中輸血量は同種赤血球濃厚が2単位,血漿交換に要した同種FFPは36単位であった.ビリルビン値は9.9mg/dlから術直後4.5mg/dlに減少,その後一過性の上昇(9.0mg/dl)を認めたが徐々に正常化し退院した.高ビリルビン血症に対する術中の血漿交換は安全かつ有用な手段と考えられた.