51 research outputs found
Some Considerations on Color Hologram Tiral Techniques Using He-Cd^+ Laser with Coherent Blue-White Light
Optical holography technology is now firmly established as a special display medium as well as a useful tool for scientific and engineering studies. It has found a remarkably wide range of applications such as color holography, holographic interferometry, and computer-generated holograms. A hollow dathode He-Cd+1aser with coherent blue-white light is now available in place of a He-Ne laser and an Ar^+ laser. A simple optical setup for the separation of RGB primary colors is proposed from the viewpoint of making the practical color hologram in this study. The deterioration of visual appearance of reconstructed images owing to the cross talk is discussed in connection with the recording materials with high resolution and wide spectral characteristics
科学分析はじめてガイド: サンプリングから解釈まで
金沢大学人間社会研究域歴史言語文化学系本書では, 科学分析の対象となるいくつもの遺物の中から, 有機物の「デンプン粒」, 「漆」, 無機物の「赤色顔料」, 「土器胎土」, 「石材・玉器」について,分析の概要を紹介します。本書前半では, それぞれの遺物分析の目的をまとめました。後半では, 分析前の試料(サンプル) をどう取り扱い, 保管しておくべきか, また実際にどのようにサンプルを処理し, どんな機器・装置を使って分析をし,どのような情報(データ) を取り出しているのか,を解説しています。科学研究費助成事業学術変革領域研究 (A)「考古遺物の材料分析と産地推定」(領域番号 20H05817)活動成果物、2022年8月31日発行)出典:(研究代表者) 神谷 嘉美, 研究課題「考古遺物の材料分析と産地推定」研究課題/領域番号20H05817(KAKEN:科学研究費助成事業データベース(国立情報学研究所)) (https://kaken.nii.ac.jp/ja/grant/KAKENHI-PLANNED-20H05817/)を加工して作成.研究課題/領域番号: 20H05817, 研究期間 (年度): 2020-11-19 – 2025-03-31本文データは、著者版活動成果物。関連研究:(研究代表者) 中村 慎一「中国文明起源解明の新・考古学イニシアティブ」(研究課題/領域番号)20H05815(KAKEN:科学研究費助成事業データベース(国立情報学研究所)) (https://kaken.nii.ac.jp/ja/grant/KAKENHI-ORGANIZER-20H05815/
Paradoxical Regulation of Human FGF21 by Both Fasting and Feeding Signals: Is FGF21 a Nutritional Adaptation Factor?
Fibroblast growth factor 21 (FGF21) has recently emerged as a metabolic hormone involved in regulating glucose and lipid metabolism in mouse, but the regulatory mechanisms and actions of FGF21 in humans remain unclear. Here we have investigated the regulatory mechanisms of the human FGF21 gene at the transcriptional level. A deletion study of the human FGF21 promoter (−1672 to +230 bp) revealed two fasting signals, including peroxisome proliferator-activated receptor α (PPARα) and glucagon signals, that independently induced human FGF21 gene transcription in mouse primary hepatocytes. In addition, two feeding signals, glucose and xylitol, also dose-dependently induced human FGF21 gene transcription and mRNA expression in both human HepG2 cells and mouse primary hepatocytes. FGF21 protein expression and secretion were also induced by high glucose stimulation. The human FGF21 promoter (−1672 to +230 bp) was found to have a carbohydrate-responsive element at −380 to −366 bp, which is distinct from the PPAR response element (PPRE). Knock-down of the carbohydrate response element binding protein by RNAi diminished glucose-induced human FGF21 transcription. Moreover, we found that a region from −555 to −443 bp of the human FGF21 promoter region exerts an important role in the activation of basic transcription. In conclusion, human FGF21 gene expression is paradoxically and independently regulated by both fasting and feeding signals. These regulatory mechanisms suggest that human FGF21 is increased with nutritional crisis, including starvation and overfeeding
模擬患者参加による「看護基本技術支援プログラム」の評価 : 不安と自律性の変化から
看護基本技術支援プログラムを臨地実習前に実施することにより、学生の不安や自律性がどのように変化するのかを明らかにした。STAIの結果からは高不安群の減少や低不安群の増加がみられ、<特性不安>と<状態不安>の関係性では、特性不安の高い学生はプログラム実施前の状態不安が高い傾向がみられた。自律性に関する調査では、実施前後で25項目中24項目において得点が上昇し、9項目に有意差がみられたが、学生の自立的な判断への自信のなさがうかがわれた。今後の課題として、個別的な分析や他者評価の側面からも検証が必要である
地域在住高齢者の趣味の有無と認知機能の関連
高齢者の趣味の有無が認知機能と関連しているとの報告が多くなされている。今回、地域在住一般高齢者272名(平均年齢72.3歳)を対象に趣味の有無と認知機能の関連を検討した。趣味を有する群(186名)と無趣味群(86名)では、主観的幸福感、抑うつ程度、 日常生活動作には有意差は見られなかったが、認知機能においては、趣味を有する群では無趣味群に比して有意に高値であった。また、趣味を有する群では、無趣味群に比して、物事に好奇心があり、社交的な性格であった。認知症予防において、趣味を持つことを積極的に勧めることは重要と思われる
Performance of ceramic anvils for high pressure neutron scattering
Three kinds of ceramics, zirconia-toughened alumina (ZTA), alumina-toughened zirconia (ATZ) and yttria-stabilized zirconia (YSZ), were tested as anvil materials, mainly for the purpose of neutron scattering study under high pressure. ZTA with non-toroidal anvil profile, having the same sample volume as conventionally used double toroidal anvils, sustained pressures up to 11.9 GPa. This is comparable to anvils made of tungsten carbide (TC) with Ni binder with the same dimensions. ATZ would also be an alternative material to TC with pressure performance comparable to ZTA, whereas YSZ is much weaker than the other two ceramics. The attenuation coefficient for YSZ is significantly smaller than that of TC and similar to ZTA and ATZ, the latter being estimated by attenuation calculations. Neutron diffraction on a sample of lead in YSZ anvils as well as quasi-elastic neutron scattering on liquid water in ZTA also demonstrate the outstanding neutron transparency of these ceramics. The gain factor in count rate is up to one order of magnitude
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