Engineering polypeptide folding through trans double bonds: transformation of miniature β-meanders to hybrid helices

Utilization of conjugated double bonds to engineer the novel folded miniature β-meander type structures, transformation of miniature β-meanders into 10/12-helices using catalytic hydrogenation, their solution and single crystal conformations are reported.

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A Novel Technique for Growth of Lithium-free ZnO Single Crystals

MRS Proceedings ◽

10.1557/opl.2013.587 ◽

2013 ◽

Vol 1538 ◽

pp. 405-410

Author(s):

Shaoping Wang ◽

Aneta Kopec ◽

Andrew G. Timmerman

Keyword(s):

Single Crystal ◽

The Novel ◽

Uv Laser ◽

Uv Detectors ◽

Growth Technique ◽

Light Emitting ◽

Alkaline Metals ◽

Novel Technique ◽

Solar Blind ◽

Zno Single Crystal

ABSTRACTA ZnO single crystal is a native substrate for epitaxial growth of high-quality thin films of ZnO-based Group II-oxides (e.g. ZnO, ZnMgO, ZnCdO) for variety of devices, such as UV and visible-light emitting diodes (LEDs), UV laser diodes and solar-blind UV detectors. Currently, commercially available ZnO single crystal wafers are produced using a hydrothermal technique. The main drawback of hydrothermal growth technique is that the ZnO crystals contain large amounts of alkaline metals, such as Li and K. These alkaline metals are electrically active and hence can be detrimental to device performances. In this paper, results from a recently developed novel growth technique for ZnO single crystal boules are presented. Lithium-free ZnO single crystal boules of up to 1 inch in diameter was demonstrated using the novel technique. Results from crystal growth and materials characterization will be discussed.

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Operando Studies of the Catalytic Hydrogenation of Ethylene on Pt(111) Single Crystal Surfaces

ACS Catalysis ◽

10.1021/cs300411p ◽

2012 ◽

Vol 2 (11) ◽

pp. 2259-2268 ◽

Cited By ~ 40

Author(s):

Aashani Tilekaratne ◽

Juan Pablo Simonovis ◽

Maria Francisca López Fagúndez ◽

Maryam Ebrahimi ◽

Francisco Zaera

Keyword(s):

Single Crystal ◽

Catalytic Hydrogenation ◽

Crystal Surfaces ◽

Single Crystal Surfaces ◽

Hydrogenation Of Ethylene ◽

Operando Studies

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Crystal Structure of (NH4)2[Mo3S(S2)6] Containing the Novel Isolated Cluster [MO3S13]2-

Zeitschrift für Naturforschung B ◽

10.1515/znb-1979-0315 ◽

1979 ◽

Vol 34 (3) ◽

pp. 434-436 ◽

Cited By ~ 45

Author(s):

A. Müller ◽

S. Pohl ◽

M. Dartmann ◽

J. P. Cohen ◽

J. M. Bennett ◽

...

Keyword(s):

Molecular Structure ◽

Crystal Structure ◽

Aqueous Solutions ◽

Single Crystal ◽

Ammonium Salt ◽

Crystal And Molecular Structure ◽

Monoclinic Space Group ◽

The Novel ◽

Mean Values ◽

X Ray

Abstract The novel tri-nuclear metal-sulfur cluster [Mo3S(S2)6]2- can be obtained as its ammonium salt by the reaction of a Moiv containing aqueous solutions with polysulfide. Its crystal and molecular structure has been determined by a single crystal X-ray study. The crystals are monoclinic (space group Cm, with a = 11.577(6) Å, b = 16.448(7) Å, c = 5.716(2) Å, β = 117.30(3)°, V = 967.2 Å3 , Z = 2, dexptl. = 2.54(2) g/cm3 , dcal = 2.54 g/cm3). The structure consists of isolated [Mo3S(S2)6]2- units, with three Mo atoms at the vertices of a triangle. There are bridging as well as terminal S22--ligands lying above and below the Mo3-plane (bond distances: Mo-Mo = 2.722 Å, Mo-S(terminal) = 2.435, Mo-S(bridging) = 2.452, Mo3-S = 2.353(4) Å and S-S = 2.04 Å (mean values)).

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Single crystal growth and effects of Ni doping on the novel 12442-type iron-based superconductor RbCa2Fe4As4F2

New Journal of Physics ◽

10.1088/1367-2630/ab9427 ◽

2020 ◽

Vol 22 (7) ◽

pp. 073007

Author(s):

Xiaolei Yi ◽

Meng Li ◽

Xiangzhuo Xing ◽

Yan Meng ◽

Caiye Zhao ◽

...

Keyword(s):

Crystal Growth ◽

Single Crystal ◽

Single Crystal Growth ◽

The Novel ◽

Ni Doping ◽

Iron Based

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1,3-Dipolar Cycloadditions of a Chiral Oxazolidinone With Nitrones and Nitrile Oxides

Australian Journal of Chemistry ◽

10.1071/ch9951511 ◽

1995 ◽

Vol 48 (9) ◽

pp. 1511 ◽

Cited By ~ 8

Author(s):

SG Pyne ◽

J Safaei-G ◽

BW Skelton ◽

AH White

Keyword(s):

Single Crystal ◽

Hydrogen Atmosphere ◽

Dipolar Cycloaddition ◽

Cycloaddition Reactions ◽

The Novel ◽

X Ray ◽

Dipolar Cycloadditions ◽

Nitrile Oxides ◽

Exocyclic Methylene

The 1,3-dipolar cycloaddition reactions of the chiral oxazolidinone (1) and nitrones are highly regioselective and only 5,5-disubstituted isoxazolidine adducts are formed. These reactions occur under equilibrating conditions to give the more stable adducts that result from addition to the exocyclic methylene of (1) from the sterically more hindered π-face. The endo adducts are generally thermodynamically favoured. In one case the novel azetidine (21) was formed from the treatment of the adduct (4a) with palladium hydroxide on carbon under a hydrogen atmosphere. The major adducts from the reaction of (1) and nitrile oxides (16a,b) had the expected stereochemistry, addition of the 1,3-dipole having occurred from the less hindered π-face of the exocyclic methylene of (1). The stereochemistry of many of these products has been elucidated by single-crystal X-ray structural determinations.

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On the Study of Cyclic Crystal Plasticity Ratchetting Constitutive Model for Polycrystalline Pure Copper

International Journal of Applied Mechanics ◽

10.1142/s1758825119500418 ◽

2019 ◽

Vol 11 (04) ◽

pp. 1950041 ◽

Cited By ~ 1

Author(s):

Yawei Dong ◽

Dongyang Xie ◽

Yang Zhang ◽

Xiong Xiao

Keyword(s):

Constitutive Model ◽

Single Crystal ◽

Kinematic Hardening ◽

Pure Copper ◽

Small Deformation ◽

Cyclic Hardening ◽

The Novel ◽

Polycrystalline Metals ◽

Proposed Model ◽

Fcc Metal

With the hypothesis of a small deformation, the novel cyclic visco-plasticity constitutive model (CV-CM) is constructed to study the cyclic deformation responses of polycrystalline metals. In this model, a modified Armstrong–Frederick nonlinear kinematic hardening (NKH) law is adopted to simulate the ratchetting deformation more precisely. The cyclic hardening characteristic of FCC polycrystalline copper is investigated with the use of flow stress evolution of slip system. For the issue of the transition from single crystal to polycrystalline crystals, the explicit [Formula: see text] rule is introduced to compute the polycrystalline response. Finally, through comparison with the experimental data, the proposed model is verified. It is demonstrated that the uniaxial ratchetting response of FCC metal can be precisely captured. The ratchetting response of copper single crystal and its relation with the crystallographic directions can be exactly traced by the present model as well.

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Kristallstruktur und Schwingungsspektren von Li5CrCl8 / Crystal Structure and Vibrational Spectra of Li5CrCl8

Zeitschrift für Naturforschung B ◽

10.1515/znb-1992-1207 ◽

1992 ◽

Vol 47 (12) ◽

pp. 1687-1692 ◽

Cited By ~ 2

Author(s):

Heinz Dieter Lutz ◽

Peter Kuske ◽

Arno Pfitzner ◽

Hermann-Josef Steiner

Keyword(s):

Crystal Structure ◽

Single Crystal ◽

Vibrational Spectra ◽

Title Compound ◽

Structure Type ◽

The Novel ◽

X Ray ◽

Symmetry Coordinates ◽

Unknown Structure ◽

Ir And Raman

The crystal structure of the novel pink Li5CrCl8 oC28 has been determined by both single crystal X-ray and neutron powder studies. The title compound crystallizes in a hitherto unknown structure type (space group C mmm, Z = 2). The final R values are R = 3.4% (715 independent reflections with I > 3aI) and Rwp = 11.5%, respectively (a = 1019.79(3), b = 723.94(2) and c = 726.16(3) pm). The structure consists of edge-connected Li(l)Cl6 and alternating edge-connected Li(2)Cl6 and CrCl6 octahedra, respectively. It is related to the NaCl super structure SnMn2S4 type. IR and Raman spectra as well as symmetry coordinates are given and discussed in terms of CrCl6 and LiCl6 breathing modes.

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