399 research outputs found
Magnetic field effects on electro-photoluminescence of photoinduced electron transfer systems in a polymer film
No full textMagnetic field effects on photoluminescence (PL) in the presence of external electric fields have been examined for a variety of electron donor and acceptor pairs, either linked with methylene chain or randomly distributed in polymethyl methacrylate (PMMA) films, which show intermolecular photoinduced electron transfer (PIET). Application of electric fields changes the energy separation among different electronic states, because the electric dipole moment at the state under consideration is usually different from the others. The energy levels within the same spin multiplicity are also shifted or splitted by application of magnetic field. Then, simultaneous application of electric field and magnetic field induces interesting effects on PL which cannot be observed when only electric field or magnetic field is applied to molecules. In this article, experimental results of the magnetic field effect of the electric field effect both on LE fluorescence and on exciplex fluorescence resulting from PIET are presented, and the mechanism of the synergy effects of the electric and magnetic fields on PL are discussed. The hyperfine interaction of the various radical-ion pairs produced by PIET has been also determined on the basis of the synergy effects on PL, and the results are compared with the calculated values
A ATMOSFERA DA TRADUÇÃO: ENTREVISTA COM NOBUHIRO FUKUSHIMA
No full textIn spite of markedly different realities, cultures and languages, the fascination of the Japanese for the Brazilian literary universe is incontestable. For decades they have been translated into the Japanese language more than 175 works and iconic names, like Guimarães Rosa (Grande Sertao Veredas, 1976), Machado (The Secret Cause, 1963), Carlos Drummond de Andrade (Flower, telephone and lady, 1977) and Carolina Maria de Jesus (Wardrobe Room, 1962). And this tradition has been maintained and renovated by the new generations, as associate professor (准 教授) of Literature at Kyoritsu Women's University (共 立 女子 大学 文 芸 学部 文 芸 学科) Nobuhiro Fukushima, writer and translator of Brazilian literature and bossa nova. As a result of his doctoral research, Fukushima is author of 魔法 使 い の 国 の 掟 リ オ デ ジ ャ ネ イ ロ の 詩 と 時 (Mahōtsukai no kuni in Okite: Rio de Janeiro no uta to Toki - The law of the country of magic: time and poetry of Rio of January).A despeito de realidades, culturas e idiomas marcadamente distintos, é inconteste o fascínio dos japoneses pelo universo literário brasileiro. Há décadas vêm sendo traduzidos para a língua japonesa mais de 175 obras e nomes emblemáticos, a exemplo de Guimarães Rosa (Grande Sertão Veredas, 1976), Machado de Assis (A Causa Secreta, 1963), Carlos Drummond de Andrade (Flor, telefone e moça, 1977) e Carolina Maria de Jesus (Quarto de despejo, 1962). E essa tradição tem sido mantida e renovada pelas novas gerações, como o professor associado (准教授) de Literatura na Kyoritsu Women’s University (共立女子大学 文芸学部 文芸学科) Nobuhiro Fukushima, escritor e tradutor de literatura brasileira e de bossa nova. Como resultado da sua pesquisa de doutorado, Fukushima é autor do livro 魔法使いの国の掟 リオデジャネイロの詩と時 (Mahōtsukai no kuni no okite: Rio de Janeiro no uta to toki – A lei do país da magia: tempo e poesia do Rio de Janeiro)
Fluorescence enhancement by an external magnetic field in pyrimidine-d4 in a supersonic jet
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Intramolecular photoexcitation dynamics and magnetic field effects in an intermediate-case molecule
No full textOsborn Wave Is Related to Ventricular Fibrillation and Tachycardia in Hypothermic Patients
No full textNobunaga Okada, Tasuku Matsuyama, Sachiko Morita, Naoki Ehara, Nobuhiro Miyamae, Yohei Okada, Takaaki Jo, Yasuyuki Sumida, Makoto Watanabe, Masahiro Nozawa, Ayumu Tsuruoka, Yoshihiro Fujimoto, Yoshiki Okumura, Kunio Hamanaka, Tetsuhisa Kitamura, Kei Nishiyama, Bon Ohta, Osborn Wave Is Related to Ventricular Fibrillation and Tachycardia in Hypothermic Patients, Circulation Journal, 2020, Volume 84, Issue 3, Pages 445-455, Released February 25, 2020, [Advance publication] Released January 30, 2020, Online ISSN 1347-4820, Print ISSN 1346-9843, https://doi.org/10.1253/circj.CJ-19-0856, https://www.jstage.jst.go.jp/article/circj/84/3/84_CJ-19-0856/_article/-char/enBACKGROUND: The Osborn wave (OW) is often observed in hypothermic patients; however, whether OW in hypothermic patients is related to the development of fatal ventricular arrhythmia, including ventricular fibrillation (VF) and pulseless ventricular tachycardia (VT), remains undetermined. This study aimed to estimate the association between OW and the incidence of fatal ventricular arrhythmias.Methods and Results: This retrospective study used the Japanese Accidental Hypothermia Network registry database and included 572 hypothermic patients. Patients were divided into the OW group (those with OW) and non-OW group (those without OW). The relationship between the development of fatal arrhythmias and presence of OW was assessed using the chi-squared test. All patients who developed VF/VT (n=10) had OW on electrocardiogram upon hospital arrival. The presence of OW had a sensitivity of 100%, specificity of 47.8%, positive predictive value of 4.0%, and negative predictive value of 100% for VF/VT development. The in-hospital mortality rate was 22.3% in the OW group and 21.2% in the non-OW group (P=0.781). CONCLUSIONS: OW was observed in all hypothermic patients with VF/VT. The occurrence of ventricular arrhythmias is highly unlikely in the absence of OW on the electrocardiogram. Although the presence of OW might be used to predict these fatal arrhythmias in hypothermic patients, there was no association between the presence of OW and in-hospital mortality
Photo- and field-induced charge-separation and phosphorescence quenching in organometallic complex Ir(ppy)3
No full textElectric field effects on absorption and photoluminescence (PL) spectra of organometallic phosphorescent emitter Ir(ppy)3, {tris[2-phenylpyridinato-C2,N] iridium (III)} doped in a film of polymethyl methacrylate (PMMA) have been confirmed at temperatures in the range of 40-295 K. Field-induced quenching of PL observed for Ir(ppy)3 is attributed to the decrease both of emitting state population and of the lifetime of PL. The quenching is independent of excitation energy as well as temperature. Field-assisted charge separation or dissociation of electron-hole (e-h) pair produced by photoexcitation may decrease the population of the emitting state. The Stark shifts on absorption and PL spectra have also been analyzed
Electric field effects on photoinduced electron transfer processes of methylene-linked compounds of pyrene and N,N-dimethylaniline in a polymer film
No full textAn explanation of the highly efficient magnetic quenching of fluorescence in intermediate case molecules based on two manifold models
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