著者
荒井 政治
出版者
關西大学經済學會
雑誌
關西大學經済論集 (ISSN:04497554)
巻号頁・発行日
vol.40, no.4, pp.687-713, 1990-10-31

本稿は、平成2年度関西大学学部共同研究費による研究の成果である。
著者
野口 大介
出版者
技術・教育研究会
雑誌
技術・教育研究論文誌 = Journal of Technology and Education
巻号頁・発行日
vol.28, no.1, pp.27-36, 2021-06

Ethylenediaminetetraacetic acid (EDTA) is one of the well-known chelating ligands learned in analytical chemistry and widely used in such as industry and molecular biology to support our daily lives. It is also demonstrated as an acidic reagent in neutralization titration. The chemical structure indicates that EDTA is a tetrabasic acid; however, confusion of its notation exists in some textbooks. Some authors represent it as a neutral molecule, while others say it is a zwitterion. As the appropriate structure of EDTA seemed unclear, I surveyed some published research papers; herein I show in detail the historical controversy concerning the various proposed structures of EDTA, including non-ionized molecule and double zwitterion with ammonium carboxylate groups, both in solid state and aqueous solution. In the 1960s, some structures based on IR spectroscopic analyses were proposed; earlier studies exhibiting non-ionized EDTA molecular structure were almost overturned. Regrettably, without sufficient reference to each other, the idea of EDTA as a neutral molecule in a solid state still remained. After that, X-ray crystallographic studies confirmed the existence of EDTA as a double zwitterion also in a solid state, whereas an XPS investigation deduced that there are two kinds of nitrogen atoms, =N+H– and =N– types, in an EDTA molecule. Recent studies have revisited a double zwitterion form of EDTA in solution; however, some textbooks of analytical chemistry have shown the chemical structure of non-ionized EDTA, subsequently, as if “it returns to the beginning”. The reasons for this difficulty in interpreting the structure of EDTA in aqueous solution are considered to be as follow: (1) the poor solubility of EDTA itself in water made it quite difficult to be measured by IR spectroscopy in solution; (2) unexpected hydrogen bonds could change the frequencies of certain IR-active bonding; (3) there was some unawareness about its states, whether in solid or in solution; (4) the fact that EDTA has two different crystalline modifications with different IR spectra was almost unknown. I hope that the present study will be helpful in making the precise structure of EDTA in solution easily available based on literature for students, with a result that also would be of significance for those who teach and educate chemical analysis and technology.
著者
赤江 尚子 吉井 美穂 笹原 志央里 山口 容子 澤田 陽子 金森 昌彦 西谷 美幸
出版者
富山大学看護学会編集委員会
雑誌
富山大学看護学会誌 (ISSN:1882191X)
巻号頁・発行日
vol.12, no.1, pp.37-45, 2012-06

Hand roughness is a problem for medical practitioners who frequently wash their hands.It is currently recommended that hand care preparations are provided to medical practitioners, but the effect or influence when such preparations are used together with antiseptics has not been investigated. In this study, we investigated how drying hand care preparations affect the sterilizing effect of antiseptics.Staphylococcus epidermidis (S. epidermidis) and Staphylococcus aureus (S. aureus) were used as the test strains. The trial medications used were a skin protective agent.As a result, the sterilizing effect after the hand care preparation had dried for 30 minutes was better against S. aureus than S. epidermidis. The present results showed that hand care preparations do not affect bacterial proliferation, that when using hand care preparation and antiseptics together. Moreover, the hand care preparation needs to be dried sufficiently.In the future, comparisons with the present results and further research conducted with consideration of the conditions of the hand care preparation will be needed.
著者
的場 昭弘 Matoba Akihiro
出版者
神奈川大学経済学会
雑誌
商経論叢 (ISSN:02868342)
巻号頁・発行日
vol.47, no.3-4, pp.41-67, 2012-05-25

論説
著者
永田 憲史
出版者
関西大学法学会
雑誌
關西大學法學論集 (ISSN:0437648X)
巻号頁・発行日
vol.57, no.4, pp.595-631, 2007-12-15
著者
楠根 重和
雑誌
金沢法学 (ISSN:0451324X)
巻号頁・発行日
vol.46, no.2, pp.A97-A122, 2004-03-25

金沢大学法学部
著者
猪瀬 武則
出版者
弘前大学教育学部
雑誌
弘前大学教育学部紀要 (ISSN:04391713)
巻号頁・発行日
no.99, pp.33-43, 2008-03-25

米国経済教育学会のカリキュラム教材『経済学の倫理的基礎付けの教授』を分析することによって、経済教育が、倫理的な基礎付け無しには成立しないことを明らかにした。経済教育は、功利主義的前提の下に利己的な人格を育成するという論難があるが、むしろ「倫理性」や「公正」「正義」は、「市場」や「経済取引」成立の大前提である。このことを、近年の行動経済学の成果や経済倫理学からの成果をもとに、活動教材という方法原理によって育成することを企図した本教材は、日本の経済教育に大きな示唆を与えることとなろう。
著者
角山 幸洋
出版者
関西大学東西学術研究所
雑誌
関西大学東西学術研究所紀要 (ISSN:02878151)
巻号頁・発行日
vol.28, pp.A17-A104, 1995-03-31
著者
Sugawara Y. Wright O. B. Matsuda O. Takigahira M. Tanaka Y. Tamura S. Gusev2 V. E.
出版者
American Physical Society
雑誌
PHYSICAL REVIEW LETTERS (ISSN:00319007)
巻号頁・発行日
vol.88, no.18, pp.185504, 2002-04-18
被引用文献数
106

We present a new method for imaging surface phonon focusing and dispersion at frequencies up to 1 GHz that makes use of ultrafast optical excitation and detection. Animations of coherent surface phonon wave packets emanating from a point source on isotropic and anisotropic solids are obtained with micron lateral resolution. We resolve rounded-square shaped wave fronts on the (100) plane of LiF and discover isolated pockets of pseudosurface wave propagation with exceptionally high group velocity in the (001) plane of TeO2. Surface phonon refraction and concentration in a minute gold pyramid is also revealed.
著者
加藤 直人
出版者
早稲田大学
巻号頁・発行日
pp.1-338, 2013

早大学位記番号:新6670
著者
松原 達哉
出版者
立正大学心理学部
雑誌
立正大学心理学部研究紀要 (ISSN:13482785)
巻号頁・発行日
no.2, pp.51-56, 2005-03-31