Solvent Extraction of DNA with a Hydrolysable Double-chain Surfactant

A cationic lipophilic surfactant with two hydrolysable groups, di(1-octadecyloxycarbonylmethyl)dimethylammonium chloride, was synthesized and solvent extraction of deoxyribonucleotide (DNA) into organic solution (isooctane/1-octanol) with it as an extractant was examined. Not only a forward extraction of DNA into the organic phase but also back extraction into the aqueous phase (pH9) at room temperature proceeded efficiently. The forward extraction is promoted by electrostatic interactions of the surfactant and DNA and the back extraction is exclusively caused by hydrolysis of the surfactant to a non-surfactant.ArticleSEPARATION SCIENCE AND TECHNOLOGY. 44(2):466-475 (2009)journal articl

Report on 2016 Okayama Prefectural University Students\u27 Beliefs in Learning English

本稿は、岡山県立大学1 年生を対象として、大学入学当初の5 月に学習者ビリーフを実施した報告である。平成27 年度から新しい英語プログラムであるEnglish Language Program (ELP) が始まった。この報告は、ELP を始めるにあたって、岡山県立大学に入学した1 年生が、英語学習に対して、どのような学習者ビリーフを持っているのかを量的に調査したものである。主な結果として、大半の学生が、統合的および道具的動機を持っていた。また、入学当初には、スピーキングに対して、不安を抱えていたことも明らかにされた

Mental and physical effects of the 2011 Great East Japan Earthquake on School Children, and Health Support initiatives by YogoTeachers: Findings from a survey of high school yogo teachers 5 years after the disaster

Objective: To clarify the current mental and physical state of students 5 years after experiencing the Great East Japan earthquake, tsunami, and nuclear accident, and to shed light on the practical initiatives and issues faced by yogo teachers in supporting students’ health. Method: In May 2016, we conducted a mail-based questionnaire of yogo teachers at 15 prefectural high schools in Soma District and Futaba District (collectively, “Soso”) in Fukushima Prefecture, one of the areas most heavily affected by the Fukushima Daiichi Nuclear Power Plant accident.　The questionnaire focused on (1) health and school life of students; and (2) current initiatives and issues faced by yogo teachers in supporting student health. Results: We received responses from 8 of the 15 high school yogo teachers surveyed (response rate: 53.3％).Six yogo teachers (75％) responded that the “students are calm.” However, 6 yogo teachers (75％) recognized a tendency among students towards weight gain and obesity, as well as reduced physical stamina and sporting ability, while 4 yogo teachers (50％) indicated that some students were anxious about their future and career path, and were receiving personal support from the school counselor.　The yogo teachers provided support to students while attempting to ascertain their mental and physical well-being through greater health monitoring and questionnaires, and while coordinating with the school physician and counselor. Conclusion: Five years after the earthquake, high school students in the Soso district are now leading a more relaxed school life, but still feel anxious about their future health and career path due to lingering concerns about radiation, highlighting the need for long-term support by yogo teachers

Elastic Convection in Vibrated Viscoplastic Fluids

We observe a new type of behavior in a shear thinning yield stress fluid: freestanding convection rolls driven by vertical oscillation. The convection occurs without the constraint of container boundaries yet the diameter of the rolls is spontaneously selected for a wide range of parameters. The transition to the convecting state occurs without hysteresis when the amplitude of the plate acceleration exceeds a critical value. We find that a non-dimensional stress, the stress due to the inertia of the fluid normalized by the yield stress, governs the onset of the convective motion.Comment: 4 pages, 6 figure