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05月29日, 1912-05-29

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.1911年06月20日, 1911-06-20
著者
井町 正樹
出版者
一般社団法人 溶接学会
雑誌
溶接学会誌 (ISSN:00214787)
巻号頁・発行日
vol.43, no.2, pp.127-134, 1974-02-25 (Released:2011-08-05)
参考文献数
14

One of the principal problems in using polyethylene is the poor adhesion because of its nonpolarity and high crystallinity. There are various methods for surface treatment to improve adhesiveness of polyethylene and many ofthem are applied on purpose to make polyethylene oxydized and polarized.Relation between treatment conditions and adhesiveness or the effect of oxydation are not sufficiently clear. In this study, low density polyethylene film was exposed to pure oxygen gas under a pressure of 20kg/cm2-80kg/cm2 at 80°C-110°C for 5hours-30hours, and then degree of oxydation, wettability, adhesiveness and others were investigated. The effect of chromic acid treatment which is popularly used on account of its convenience was also examined.The results are summarized as follows:(1) Oxygen gas treatment even at a temperature below the melting point of polyethylene is somewhat effective on wettability and adhesiveness and more effective at a temperature above the melting point.(2) The adhesive strength of polyethylene increases owing to oxygen gas treatment but shows a decreasing tendency in excessive oxydation. One of the factors which cause this fact seems to be the weak boundary layer fomed with the advance of oxydation.(3) It becomes clear that the effect of only oxydation on adhesiveness is not so remarkable, i.e. polyethylene surface subjected to oxygen gas treatment dose not exhibit more increase in adhesive strength than that treated with chromic acid which is considered to be attended with some factors such as surface roughness in addition to oxydation.
著者
西村 孝史
出版者
特定非営利活動法人 組織学会
雑誌
組織科学 (ISSN:02869713)
巻号頁・発行日
vol.53, no.3, pp.49-61, 2020-03-20 (Released:2020-08-13)
参考文献数
49

J1リーグを題材にSHRM(戦略的人的資源管理)におけるミクロ的基礎に関する実証研究を行った.既存のユニットレベルの人的資本研究の課題に対して報酬分散の概念を援用し,ユニットレベルの人的資本の分散と人員構成が,順位に与える影響を検討した.分析の結果から,⑴チーム内での報酬分散は順位に負の影響を与えること,⑵タスク型のダイバーシティは,順位に正の影響を与えることを指摘する.
著者
Chiaki SATO Saki KANEKO Ayami SATO Nantiga VIRGONA Kozue NAMIKI Tomohiro YANO
出版者
Center for Academic Publications Japan
雑誌
Journal of Nutritional Science and Vitaminology (ISSN:03014800)
巻号頁・発行日
vol.63, no.5, pp.349-354, 2017 (Released:2017-12-08)
参考文献数
29
被引用文献数
9 29

Tocotrienols (T3s) and tocopherols (Tocs) are both members of the vitamin E family. It is known that δ-tocotrienol (δ-T3) has displayed the most potent anti-cancer activity amongst the tocotrienols. On the other hand, γ-tocopherol (γ-Toc) is reported to have a protective effect against prostate cancer. Therefore, we investigated whether the combination of γ-Toc and δ-T3 could strengthen the inhibitory effect of δ-T3 on prostate cancer cell growth. In this study the effect of combined δ-T3 (annatto T3 oil) and γ-Toc (Tmix, γ-Toc-rich oil) therapy was assessed against human androgen-dependent prostate cancer cells (LNCaP). We found that combined treatment of δ-T3 (10 μM) and γ-Toc (5 μM) resulted in reinforced anti-prostate cancer activity. Specifically, cell cycle phase distribution analysis revealed that in addition to G1 arrest caused by the treatment with δ-T3, the combination of δ-T3 with γ-Toc induced G2/M arrest. Enhanced induction of apoptosis by the combined treatment was also observed. These findings indicate that combination of δ-T3 and γ-Toc significantly inhibits prostate cancer cell growth due to the simultaneous cell cycle arrest in the G1 phase and G2/M phase.
著者
春田 正毅
出版者
公益社団法人 日本表面科学会
雑誌
表面科学 (ISSN:03885321)
巻号頁・発行日
vol.32, no.2, pp.70-75, 2011

Among base metal oxides, Co<sub>3</sub>O<sub>4</sub>, MnO<sub>2</sub>, and NiO, which have p-type semiconducting properties, hold potential catalytic capability for the oxidation of carbon monoxide (CO) at temperatures below 0<sup>o</sup>C. Either of the following requirements should be fulfilled; low moisture content in reaction feed, optimum temperature and atmosphere for catalyst pretreatments, and the control of metal oxide morphology. Surface oxygen vacancies are assumed to play a key role in low temperature CO oxidation.
著者
Walaa Elmasry Yoko Kebukawa Kensei Kobayashi
雑誌
JpGU-AGU Joint Meeting 2020
巻号頁・発行日
2020-03-13

Extraterrestrial delivery of organic compounds including amino acids to the early Earth during the late heavy bombardment (3.8-4.5 billion years ago) may have been important for the origin of life. Recently, it is suggested that chondritic organic matter was produced through reactions of interstellar formaldehyde, followed by condensation, and carbonization probably during hydrothermal alteration on chondritic asteroids (Cody et al 2011). Furthermore, Kebukawa et al. (2013, 2015) illustrated that the presence of ammonia significantly enhances the yields of IOM from formaldehyde via formose reaction at 150 °C, producing amino acids. Meteorites serve as delivery systems for extraterrestrial phyllosilicate minerals to Earth. Phyllosilicates may act as absorbents and catalysts for the reactions of organic precursor molecules in the early solar system (Pearson et.al 2002). In the current research, we are studying formations of amino acid at 150 °C and reveal the expected role of minerals, namely, montmorillonite, olivine and serpentine for amino acid productions in water-bearing planetesimals.We synthesized organic compounds using a mixture of water, formaldehyde and ammonia (H2O, H2CO, NH3) in a ratio of 100:7:1 with adding minerals (10 g/ L) by simulating primordial materials in comets and asteroids. Aqueous solutions were heated at 150 °C for 24, and 72 hours. The resulted products were divided into two parts, the first part analyzed using a FT/IR, and GFC, while the other one was acid hydrolyzed, desalted, and subjected to amino acid analysis using an HPLC.In HPLC analysis, considerable amounts of various amino acids including glycine and alanine were detected. Moreover, presence of non-protein amino acids (β-Ala, γ-ABA) is considered as an evidence for extraterrestrial origin and against terrestrial contamination. Our preliminary results showed that the obtained amount of amino acids was elevated with the presence of minerals. FT/IR spectra of samples with minerals showed more spectral intensities than samples without minerals due to synthesis of more organic compounds. GFC showed that high molecular weight organic compounds were formed which may be characterized as amino acid precursors that maintain stable at high temperature and longer durations giving various kinds of amino acids after acid hydrolysis. These results suggested that various amino acids could be formed abiotically via a mixture of formaldehyde, ammonia, and water, as well as, the associated minerals act as catalysts to produce amino acid precursors during aqueous activities in the planetesimals.References:Cody, G. D. et al. PNAS 108, 19171–19176 (2011).Kebukawa, Y., David Kilcoyne, A. L. & Cody, G. D. The Astrophysical Journal 771, 19 (2013).Kebukawa, Y. & Cody, G. D. Icarus 248, 412–423 (2015).Pearson, V. K. Meteoritics & Planetary Science 37, 1829–1833 (2002).

1 0 0 0 OA 黥と渡来人

著者
張 従軍 岡部 孝道
出版者
国際日本文化研究センター
雑誌
日本研究 : 国際日本文化研究センター紀要 (ISSN:09150900)
巻号頁・発行日
vol.20, pp.31-67, 2000-02-29

渡来人の問題は、日本歴史の文化を研究する上で重要な課題である。一般には、渡来人は稲作とともに日本列島に入ってきたとされている。しかし、考古学の資料を見ると、古くは稲作が渡来した以前の縄文時代前・中期には、日本列島において、大陸文化に極めて類例した新しい文化要素が、すでに出現していたことが判明する。特に、顔に刻まれた入れ墨を特徴とする土偶などは、大陸の黄河流域における新石器文化に見られる入れ墨の形象と、ほぼ完全に一致している。入れ墨は、古代中国においては刑罰の一種であり、その起源も大変古い。入れ墨の刑を受けた者は、ただちに辺境の寒冷な北方地区に追放されるのが常で、二度と故郷に戻ることはなかった。このため、受刑者が追放された地方もまた、「鬼」の国と呼ばれていた。アジア東北地域に広く存在していた「鬼」の信仰など、この地域一帯で古くから密接な交流があったことを物語っている。初期に日本に上陸してきた「渡来人」とは、入れ墨の刑を受けた大陸からの流刑囚であった可能性を提起したい。彼らの影響によって日本列島では「紋身黥面」という風習が起こったのではなかろうか。