ダイ5ジ ノ ナンキョク チイキ カンソクタイ カイヨウ ブモン ブツリ カンケイ ホウコク

第5次南極地域観測(1960年11月～1961年5月)において海洋部門の船上観測の一部としてBT観測および各層観測を行なった.BT観測は原則として,ケープタン・南極間は1日2回,その他においては1日1回行なった.各層観測は南極洋において7点,帰路のインド洋において2点行なった(Fig. 1).これらの観測の結果はFigs. 2～7に示した通りであるが,本文においては,主として物理的海洋学の立場からこれらの観測結果を記述した.Bathythermograph and serial observations were performed on board the "SOYA" of the Japanese Antarctic Research Expedition (J.A.R.E.) as one of the research projects during the period of the expedition (Nov. 1960-May 1961). Bathythermograph observations were normally carried out once a day between Tokyo and Cape Town and twice a day between Cape Town and the Antarctic Region while the ship was at sea. Five hydrographic stations were occupied in the Antarctic Region, two after leaving the icy sea toward Cape Town and two in the northeastern part of the Indian Ocean on the way back to Singapore. Results of these observations are shown in the Figures and described mainly from the standpoint of physical oceanography

Conductivity study of Zeolitic Imidazolate Frameworks, Tetrabutylammonium hydroxide doped with Zeolitic Imidazolate Frameworks, and mixed matrix membranes of Polyetherimide/Tetrabutylammonium hydroxide doped with Zeolitic Imidazolate Frameworks for proton conducting applications

[EN] ZIF-8 (Z8), ZIF-67 (Z67), and ZMix, a Zn/Co bimetallic zeolitic imidazolate framework (ZIF), were synthesized and doped with tetrabutylammonium hydroxide (ZIFsT). The obtained powders were used as fillers for polyetherimide (PEI) at a concentration of 20 wt %. The presence of the three ZIFsT in the polymeric matrix enhanced proton transport relative to that observed for PEI or ZIFs alone. The real and imaginary parts of the complex conductivity were obtained for each of the six materials, and the temperature and frequency dependence of the real part was analyzed. The results at different temperatures show that the dc-conductivity are about three orders of magnitude higher for the doped ZIFsT materials than for the PEI/ZIFsT membranes. In addition, the conductivity of the PEI/ZIFsT membranes increases five or six times when the temperature is changed from 25 °C to 55 °C. For these materials, the conductivity measurements have a linear dependency with frequency, which allowed for the creation of a master curve. It was also found that the PEI/ZMixT membrane activation energy is four times smaller than that of PEI/Z8T membranes and five times smaller than that of PEI/Z67T. Similarly, the real and imaginary parts of the complex dielectric constant were obtained, and the tan ¿ was evaluated. Using this value, the diffusion coefficient and the charge carrier density were obtained. A discussion of the proton transport mechanism through the membrane is given, and a comparison of this work with those on similar electrolyte membranes is included.This research has been supported by the ENE/2015-69203-R project, granted by the Ministerio de Economia y Competitividad (MINECO), Spain, and grants from National Mexican Council for Science and Technology for the scholarships of Ph.D. No. 356825 and mixed scholarship 2015 - MZO2016-mobility in the foreigner granted to Jesus Vega Moreno registered scholarship holder number 256015. Thanks to the CONACYT Program for the fellowship at the Universidad Politecnica de Valencia (UPV) and Universitat Jaume I that PhD student Jesus Vega used to carry out the experimental studies of this work. DGAPA-PAPIIT IG-100315.Vega, J.; Andrio, A.; Lemus, AA.; Del Castillo, LF.; Compañ Moreno, V. (2017). Conductivity study of Zeolitic Imidazolate Frameworks, Tetrabutylammonium hydroxide doped with Zeolitic Imidazolate Frameworks, and mixed matrix membranes of Polyetherimide/Tetrabutylammonium hydroxide doped with Zeolitic Imidazolate Frameworks for proton conducting applications. Electrochimica Acta. 258:153-166. https://doi.org/10.1016/j.electacta.2017.10.095S15316625

Preventing undesirable structure flexibility in pyromellitate metal organic frameworks

This project has received funding from: the European Union's Horizon 2020 research and innovation program under grant agreement No 685727; the Engineering & Physical Sciences Research Council (EPSRC) under awards EP/K005499/1 and EP/K039210/1; and the University of St Andrews School of Chemistry.Removal of coordinated water molecules from the porous Zn‐pyromellitate metal organic framework Zn5(OH)2(PMA)2(H2O)4 · x H2O (PMA = pyromellitic acid or 1,2,4,5‐benzene tetracarboxylic acid) should generate coordinatively unsaturated metal sites suitable for gas adsorption. However, reports of instability towards dehydration have restricted the study and utility of this MOF. Here we examine in more detail the nature of the structural transformation that occurs upon dehydration. This study reveals that a fully reversible crystalline‐crystalline transformation from a porous to a non‐porous homologue takes place, proceeding through a partially dehydrated intermediate. We show that doping the structure with Ni2+ ions at greater than 30 % prevents structural rearrangement, thereby maintaining porosity, and rendering the material effective for gas (nitric oxide) adsorption applications. These results indicate that doping can be an effective means to increase the utility of otherwise unserviceable structures.Publisher PDFPeer reviewe

Guest Molecule-Responsive Functional Calcium Phosphonate Frameworks for Tuned Proton Conductivity

We report the synthesis, structural characterization, and functionality of an open-framework hybrid that combines Ca2+ ions and the rigid polyfunctional ligand 5-(dihydroxyphosphoryl) isophthalic acid (PiPhtA). Ca-PiPhtA-I is obtained by slow crystallization at ambient conditions from acidic (pH≈3) aqueous solutions. It possesses a high water content (both Ca coordinated and in the lattice), and importantly, it exhibits water-filled 1D channels. At 75 °C, Ca-PiPhtA-I is partially dehydrated and exhibits a crystalline diffraction pattern that can be indexed in a monoclinic cell with parameters close to the pristine phase. Rietveld refinement was carried out for the sample heated at 75 °C, Ca-PiPhtA-II, using synchrotron powder X-ray diffraction data.All connectivity modes of the “parent” Ca-PiPhtA-I framework are retained in Ca-PiPhtA-II. Upon Ca-PiPhtA-I exposure to ammonia vapors (28% aqueous NH3) a new derivative is obtained (Ca-PiPhtA-NH3) containing 7 NH3 and 16 H2O molecules according to elemental and thermal analyses. Ca-PiPhtA-NH3 exhibits a complex X-ray diffraction pattern with peaks at 15.3 and 13.0 Å that suggest partial breaking and transformation of the parent pillared structure. Although detailed structural identification of Ca-PiPhtA-NH3 was not possible, due in part to nonequilibrium adsorption conditions and the lack of crystallinity, FT-IR spectra and DTA-TG analysis indicate profound structural changes compared to the pristine Ca-PiPhtA-I. At 98% RH and T = 24 °C, proton conductivity, σ, for Ca PiPhtA-I is 5.7 ×10−4 S·cm−1. It increases to 1.3 × 10−3 S·cm−1 upon activation by preheating the sample at 40 °C for 2 h followed by water equilibration at room temperature under controlled conditions. Ca-PiPhtA-NH3 exhibits the highest proton conductivity, 6.6 × 10−3 S·cm−1, measured at 98% RH and T = 24 °C. Ea for proton transfer in the above-mentioned frameworks range between 0.23 and 0.4 eV, typical of a Grothuss mechanism of proton conduction.Proyecto nacional MAT2010-1517

Performance of Preformed Au/Cu Nanoclusters Deposited on MgO Powders in the Catalytic Reduction of 4-Nitrophenol in Solution

The deposition of preformed nanocluster beams onto suitable supports represents a new paradigm for the precise preparation of heterogeneous catalysts. The performance of the new materials must be validated in model catalytic reactions. It is shown that gold/copper (Au/Cu) nanoalloy clusters (nanoparticles) of variable composition, created by sputtering and gas phase condensation before deposition onto magnesium oxide powders, are highly active for the catalytic reduction of 4-nitrophenol in solution at room temperature. Au/Cu bimetallic clusters offer decreased catalyst cost compared with pure Au and the prospect of beneficial synergistic effects. Energy-dispersive X-ray spectroscopy coupled with aberration-corrected scanning transmission electron microscopy imaging confirms that the Au/Cu bimetallic clusters have an alloy structure with Au and Cu atoms randomly located. Reaction rate analysis shows that catalysts with approximately equal amounts of Au and Cu are much more active than Au-rich or Cu-rich clusters. Thus, the interplay between the Au and Cu atoms at the cluster surface appears to enhance the catalytic activity substantially, consistent with model density functional theory calculations of molecular binding energies. Moreover, the physically deposited clusters with Au/Cu ratio close to 1 show a 25-fold higher activity than an Au/Cu reference sample made by chemical impregnation

QUEEN MAUD LAND ト ミナミ アフリカ カン ニオケル ナンキョクヨウ ノ スイカイ ニツイテ キョクチ カイヨウガク シンポジウム

第7次南極地域観測の海洋観測によって明らかにされた,Queen Maud Landと南アフリカの間における,南極洋の水塊の状態について記述した.また,DISCOVERY II (1933)およびOB (1957および1962)の観測資料と比較した結果,特に底層水については,その性質にわずかではあるが年による差違が認められ,底層水の生成に示唆をあたえるものとして注目される

酸性配位高分子の合理的な設計、およびそのプロトン伝導性と選択的吸着特性

京都大学0048新制・課程博士博士(理学)甲第16653号理博第3765号新制||理||1545(附属図書館)29328京都大学大学院理学研究科化学専攻(主査)教授 北川 宏, 准教授 植田 浩明, 教授 矢持 秀起学位規則第4条第1項該当Doctor of ScienceKyoto UniversityDA

Prevalência de má oclusão em pré-escolares de Piracicaba - SP

Este trabalho teve por objetivo avaliar clinicamente as relações morfológicas oclusais de crianças com idade entre 3 anos e 6 meses a 6 anos e 11 meses, freqüentadoras de creches municipais da cidade de Piracicaba-SP. Foram analisadas as relações ântero-posteriores e transversais dos arcos dentais decíduos que foram classificados de acordo com a morfologia presente em: Relação dos incisivos - sentido vertical: (Mordida aberta anterior, Sobremordida (Overbite), Norma! - incisivo superior cobrindo até 1/3 do incisivo inferior); Relação dos incisivos - sentido horizontal: (Mordida cruzada, Sobressaliência (Overjet), Normal - incisivo superior cobrindo até 1/3 do incisivo inferior, por vestibular); Relação ântero-posterior de caninos decíduos: (Classe I - canino superior ocluindo no espaço entre o canino e o primeiro molar inferior; Classe II - canino superior ocluindo anteriormente ao espaço entre o canino e o primeiro molar inferior; Classe III - canino superior ocluindo posteriormente ao espaço entre o canino e o primeiro molar inferior); Relação terminal dos segundos molares decíduos: Degrau mesial, Degrau distai, Plano Vertical. As crianças foram examinadas por um CD e pela acadêmica para a análise da oclusão, juntamente com a fonoaudióloga, sob luz natural no ambiente da creche. Para esses exames foram utilizados abaixadores de língua de madeira, luvas de látex, avental, máscaras e gorros descartáveis. A análise foi realizada através de estatística descritiva observando-se as variáveis em análise: alterações oclusais.The aim of this study was to evaluate the oclusión morphologic relationships of the children aged 3 years and 6 months to 6 years and 11 months, who attend the county daycares from Piracicaba-SP. It was evaluated the anterior-posterior and transversal relationship between the dental archs in primary teeth and they were classified according to the morphology: Incisor Relationship - vertical plane: {anterior open bite, Overbite, Normal - upper incisisor covering 1/3 of the lower incisisor); Incisor Relationship - horizontal plane: (Crossbite, Overjet, Normal - upper incisor covering 1/3 of the lower incisor buccally); Antero-posterior primary cuspidic relationship: (Class I - upper cúspide occluion in the space between cúspide and primary first molar; Class II - anterior cúspide occluion in the space between cúspide and primary first molar; Classe III - posterior cúspide occluion in the space between cúspide and primary first molar); Terminal relationship of the primary second molars: Mesial Step, Distal Step, Vertical Plane. The children were examined by a Dentisty and a Speech Language Therapist under natural light in the daycares. It was concluded that there was a high prevalence of malocclusion (71.6%) in the sample studied. The higher percentage-was found to anterior open bite associated to the lateral-posterior crossbite

On the Water Masses of the Southern Ocean in the Section between Queen Maud Land and South Africa (Reports read at the Symposium on Polar Oceanography)

第7次南極地域観測の海洋観測によって明らかにされた,Queen Maud Landと南アフリカの間における,南極洋の水塊の状態について記述した.また,DISCOVERY II (1933)およびOB (1957および1962)の観測資料と比較した結果,特に底層水については,その性質にわずかではあるが年による差違が認められ,底層水の生成に示唆をあたえるものとして注目される