1,999 research outputs found
Cha guan. [3 & 4]
No full text1. 茶館 : side 3 -- 2. 茶館 : side 4.Section number supplied by cataloguer.Possibly reproduced from other commercial recording or radio broadcast (Pending for review)Electronic reproduction from Rulan Chao Pian Audio Cassette Collection.Spoken in Chinese.1. Cha guan : side 3 -- 2. Cha guan : side 4
Cha guan. [1 & 2]
No full text1. 茶館 : side 1 -- 2. 茶館 : side 2.Section number supplied by cataloguer.Possibly reproduced from other commercial recording or radio broadcast (Pending for review)Electronic reproduction from Rulan Chao Pian Audio Cassette Collection.Spoken in Chinese.1. Cha guan : side 1 -- 2. Cha guan : side 2
Otoe Cha-Doe-Nah-Ye, or Standing Buffalo
No full textPortrait photograph of Otoe Cha-Doe-Nah-Ye, otherwise known as Standing Buffalo. He was the father of James W. Arkeketa
<i>Poc1a</i><sup>cha/cha</sup> males exhibit progressive germ cell loss.
No full text<p>Paraffin sections of testes tissues collected from wild type and <i>Poc1a</i><sup>cha/cha</sup> mice at the indicated ages were stained with Periodic acid-Schiff reagent. At P1 and P7 <i>Poc1a</i><sup>cha/cha</sup> tubules resemble wild type seminiferous tubules, but from P14 through 12 wks, the <i>Poc1a</i><sup>cha/cha</sup> tubules are obviously abnormal. (N = 3 animals of each genotype at each age, scale bar = 50 μm).</p
"Christian wisdom: desiring God and learning in love" by David Ford
No full textReview of
David Ford, Christian Wisdom: Desiring God and Learning in Love (Cambridge: CUP, 2007)Publisher PD
COMPLEXITIES OF 3-MANIFOLDS FROM TRIANGULATIONS, HEEGAARD SPLITTINGS AND SURGERY PRESENTATIONS
No full textWe study complexities of 3-manifolds defined from triangulations, Heegaard splittings, and surgery presentations. We show that these complexities are related by linear inequalities, by presenting explicit geometric constructions. We also show that our linear inequalities are asymptotically optimal. Our results are used in another paper of the author to estimate Cheeger-Gromov L-2 rho-invariants in terms of geometric group theoretic and knot theoretic data.110sciescopu
Lean NOx Capture and Reduction by NH3 via NO+ Intermediates over H-CHA at Room Temperature
No full textThe oxidation of NO to NO2 and the subsequent reduction by NH3 via a NO+ intermediate over a proton-type chabazite zeolite (H-CHA) were investigated by the combination of in situ infrared (IR) spectroscopy and density functional theory (DFT) calculations. The in situ IR spectral results indicate that the NO' species formed under a flow of NO + O-2 at 27-250 degrees C are more stable at lower temperatures over both H-CHA and copper-cation-exchanged CHA zeolite (Cu-CHA). The Arrhenius plot (T = 27-120 degrees C) shows a negative apparent activation barrier energy (-11.5 kJ mol(-1)) for the formation of NO+ species under the NO + O(2 )flow over H-CHA. The time course of the IR spectra at 27 degrees C shows that NO is oxidized by O-2 to NO2 and then further converted via N2O4 to NO+ and NO3. The subsequent exposure to NH3 at 27 degrees C reduces the NO species to N-2. DFT calculations revealed that Bronsted acid sites in zeolite pores promote the dissociation of N2O4 intermediates into NO and NO3- species with a low activation barrier (15 kJ mol(-1)). Moreover, the computed activation barrier for the reduction of NO+ species by NH3 was considerably low (6 kJ mol(-1)). The experimental and theoretical results of this study demonstrate the high potential of Cu-free H-CHA zeolites for promoting lean NOx capture to form NO+ species and the subsequent reduction by NH3 at room temperature
CHA Improves Mine Survivors’ Quality of Life
No full textThe Cambodian Handicraft Association (CHA) for the Landmine and Polio Disabled is a safe-haven for Cambodia’s in-need mine victims. The organization works with the survivors and their communities to give the disabled a chance to rebuild their lives
Amenable L-2-Theoretic Methods and Knot Concordance
No full textWe reveal new structures in the topological knot concordance group. As a key ingredient, we develop obstructions using L-2-theoretic methods for amenable groups in Strebel's class recently introduced by Orr and the author. Concerning (h)-solvable knots, which are defined in terms of certain Whitney towers of height h in bounding 4-manifolds, we show the following: for any n>1, there are (n)-solvable but non-(n. 5)-solvable (and therefore nonslice) knots, which are not detected by prior methods using Cochran-Orr-Teichner L-2-signature obstructions as well as Levine algebraic obstructions and Casson-Gordon invariants.X1197sciescopu
High-Silica CHA Zeolite Membrane with Ultra-High Selectivity and Irradiation Stability for Krypton/Xenon Separation
No full textCapture and storage of the long-lived 85Kr is an efficient approach to mitigate the emission of volatile radionuclides from the spent nuclear fuel reprocessing facilities. However, it is challenging to separate krypton (Kr) from xenon (Xe) because of the chemical inertness and similar physical properties. Herein we prepared high-silica CHA zeolite membranes with ultra-high selectivity and irradiation stability for Kr/Xe separation. The suitable aperture size and rigid framework endures the membrane a strong size-exclusion effect. The ultrahigh selectivity of 51–152 together with the Kr permeance of 0.7–1.3×10−8 mol m−2 s−1 Pa−1 of high-silica CHA zeolite membranes far surpass the state-of-the-art polymeric membranes. The membrane is among the most stable polycrystalline membranes for separation of humid Kr/Xe mixtures. Together with the excellent irradiation stability, high-silica CHA zeolite membranes pave the way to separate radioactive Kr from Xe for a notable reduction of the volatile nuclear waste storage volume.ChemE/Catalysis Engineerin
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