45,375 research outputs found
Zeng bu liu chen zhu wen xuan
No full text昭明太子撰 ; 李善...[et al.]註.綫裝 ; 6函.框18.9x13.6公分, 10行18字, 小字雙行. 白口, 四周單邊, 無魚尾. 版心中鐫題名及卷次, 下鐫葉次及刻工.目錄題下載"明太子洪楩校".出版項據《數位典藏聯合目錄》.With: 李善上文選註表 ; 進五臣集註文選表 / 呂延祚 ; 諸儒議論 / 陳仁子輯.Xian zhuang ; 6 han.Kuang 18.9 x 13.6 gong fen, 10 hang 18 zi, xiao zi shuang hang. Bai kou, si zhou dan bian, wu yu wei. Ban xin zhong juan ti ming ji juan ci, xia juan ye ci ji ke gong.Mu lu ti xia zai "Ming tai zi Hong Pian jiao".Chu ban xiang ju "Shu wei dian cang lian he mu lu".Zhaoming tai zi zhuan ; Li shan...[et al.] zhu.With: Li Shan shang wen xuan zhu biao ; Jin wu chen ji zhu wen xuan biao / Lü Yanzuo ; Zhu ru yi lun / Chen Renzi ji
白金微粒/Ru錯合物/高分子薄磨修飾電極之製備及其電催化應用
No full text[[abstract]]Membrane-metal modified cells are usually applied to the field of membrane cells, such as fuel cells, light cells… etc. Some hydrogen evolution catalysts, for example Pt metal, are used as the cathodes in these cells. Therefore, in this research, we try to dose a series of Ru complexes into the intervals between the cathode and the thin film electrode to improve the hydrogen evolution efficiency of the membrane-metal modified cells.
Ru complex (chosen from Ru(bpy)2phenNH2, Ru(dmb)2 phenNH2, Ru(tmb)2phenNH2, Ru(bpy)2Cl2, Ru(dmb)2Cl2, Ru(tmb)2Cl2) doped Nafion solution was drop-coated onto glassy carbon (GC) electrode and formed a thin film after drying. Then, the GC electrode was immersed into H2PtCl6 solution, and the Pt/Ru complex/polymer modified electrode was obtained by reducing Pt with a DPTB method. Different amount of Pt was electroplated on the GC electrode even at the same conditions (the same potential, the same time interval) when different consistency or kinds of Ru complexes were used, suggesting the influence of the ligands on the red-ox property of Ru complexes. The effective surface area (estimated by CV method) of Pt in the modified electrode is also varied with different species of Ru complexes, which in turn affect on the efficiency of hydrogen evolution.
Furthermore, from the information obtained by SEM and EDS, the alignment and the density of Pt particles growing on the GC electrode are figured out. From the fluorescence lifetime and luminescence spectra, a good electron-transfer is considered to have occurred between D series Ru complexes and Pt modified electrode that explained why a high hydrogen evolution efficiency has been obtained. The modified electrodes are still stable one month after fabricated and their hydrogen evolution efficiency was as good as a newly prepared one.
EXAFS, DFT, light-induced nucleobase binding, and cytotoxicity of the photoactive complex cis-[Ru(bpy)2(CO)Cl]+
No full textThe aqueous photochemistry of cis-[Ru(bpy)2(CO)Cl]+ (1) was investigated at 310 K and under visible light (white) irradiation by NMR and ESI-HR-MS. Complex 1 releases a Cl ligand, coordinates a solvent molecule, and forms the complex cis-[Ru(bpy)2(CO)(H2O)]2+ (2). Also, irradiation experiments were performed in the presence of the nucleobase derivatives 9-ethylguanine (9-EtG) and 9-ethyladenine (9-EtA). Formation of Ru-9-EtG adducts was observed after 3 h irradiation by NMR and HR-MS, while only very small amounts of a Ru-9-EtA adduct could be detected by HR-MS. Solution structural data were obtained by X-ray absorption spectroscopy (XAS) for both 1 and 2. EXAFS gave a Ru−Cl distance of 2.416(7) Å for 1 and a Ru−OH2O distance of 2.102(6) Å for 2. DFT and TDDFT were employed to study the photophysical and photochemical properties of 1. Calculations show that dissociative metal-centered states can be related to the light-induced release of a Cl ligand and subsequent coordination of a solvent molecule. The compound showed no antiproliferative activity in three human carcinoma cell lines (lung, bladder, pancreas) under the testing conditions, either with or without irradiation with UV light
Quaterpyridine Ligands for Panchromatic Ru(II) Dye Sensitizers
No full textA new general synthetic access to carboxylated quaterpyridines (qpy), of interest as ligands for panchromatic dyesensitized solar cell organometallic sensitizers, is presented. The strategic step is a Suzuki−Miyaura cross-coupling reaction,
which has allowed the preparation of a number of representative unsubstituted and alkyl and (hetero)aromatic substituted qpys.
To bypass the poor inherent stability of 2-pyridylboronic acid derivatives, we successfully applied N-methyliminodiacetic acid
(MIDA) boronates as key reagents, obtaining the qpy ligands in good yields up to (quasi)gram quantities. The structural,
spectroscopic (NMR and UV−vis), electrochemical, and electronic characteristics of the qpy have been experimentally and
computationally (DFT) investigated. The easy access to the bis-thiocyanato Ru(II) complex of the parent species of the qpy
series, through an efficient route which bypasses the use of Sephadex column chromatography, is shown. The bis-thiocyanato
Ru(II) complex has been spectroscopically (NMR and UV−vis), electrochemically, and computationally investigated, relating its
properties to those of previously reported Ru(II)−qpy complexes.“This document is the Accepted Manuscript version of a Published Work that appeared in final form in [The Journal of Organic Chemistry], copyright © American Chemical Society after peer review and technical editing by the publisher
A Rosary of Rubies: The Chronicle of the Gur-rigs mDo-chen Tradition from South-Western Tibet
No full textThe mDo-chen bKa’-brgyud-pa school represents a little known Buddhist tradition from Mang-yul Gung-thang in south-western Tibet. It goes back to a Buddhist yogin known as Ma-bdun-pa or Ma-bdun ras-chen (12th/13th c.) and was later mainly spread by members of the Gur family. Although belonging to the “Upper ’Brug” (stod ’brug) branch of the ’Brug-pa bKa’-brgyud-pa school, the mDo-chen tradition has always been deeply infused with the “spoken teachings” (bka’ ma) and “treasure teachings” (gter ma) of the rNying-ma-pa school, and the cult of the “Seven Ma-mo Sisters” (ma mo mched bdun) was particularly practised and transmitted by its members. This book presents a critical edition, an annotated translation and a photographic reproduction of a manuscript copy of a rare chronicle of the Gur-rigs mDo-chen tradition written by Brag-dkar rta-so sPrul-sku Chos-kyi dbang-phyug (1775–1837). The text provides us with an overview of the tradition’s development mainly through biographical accounts but also through prophecies, prayers and praises for individual masters. The study concludes with two appendices based on the mDo chen bka’ brgyud gser ’phreng, a lineage history composed in the 15th century, and the “records of teachings received” (thob yig) of three important members of the Gur family, thus allowing us to gain an insight into the transmissions of the mDo-chen bKa’-brgyud-pa school and the interactions of its representatives with other important Buddhist teachers up to the 18th century. The present work is a further outcome of the author’s investigations into the cultural and religious traditions of south-western Tibet and the neighbouring Himalayan valleys
Chen Chen, 42nd Annual ODU Literary Festival
No full textChen Chen is the author of When I Grow Up I Want to Be a List of Further Possibilities (BOA Editions, 2017), which was long-listed for the National Book Award and won the Thom Gunn Award, among other honors. Bloodaxe Books published a UK edition in June. He is also the author of four chapbooks, most recently You MUST Use the Word Smoothie (Sundress Publications, 2019) and Gesundheit! (in collaboration with Sam Herschel Wein and forthcoming from Glass Poetry Press, fall 2019). His work appears in many publications, including Poem-a-Day, The Massachusetts Review, The Best American Poetry, and The Best American Nonrequired Reading. He has received a Pushcart Prize and fellowships from Kundiman and the National Endowment for the Arts. He holds an MFA from Syracuse University and a PhD from Texas Tech University. He teaches at Brandeis University as the Jacob Ziskind Poet-in-Residence and co-runs the journal, Underblong. He lives in Waltham, Massachusetts, with his partner, Jeff Gilbert, and their pug, Mr. Rupert Gile
On the Nochka–Chen–Ru–Wong proof of Cartan's conjecture
No full textAbstractIn 1982–1983, E. Nochka proved a conjecture of Cartan on defects of holomorphic curves in Pn relative to a possibly degenerate set of hyperplanes. This was further explained by W. Chen in his 1987 thesis, and subsequently simplified by M. Ru and P.-M. Wong in 1991. The proof involved assigning weights to the hyperplanes. This paper provides further simplification of the proof of the construction of the weights, by bringing back the use of the convex hull in working with the “Nochka diagram.
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