Mechanism of Pyrroloquinoline Quinone-Dependent Hydride Transfer Chemistry from Spectroscopic and High-Resolution X-ray Structural Studies of the Methanol Dehydrogenase from Methylococcus capsulatus (Bath)

2021 ◽  
Vol 143 (9) ◽  
pp. 3359-3372
Author(s):  
Sunney I. Chan ◽  
Phimonphan Chuankhayan ◽  
Pavan Kumar Reddy Nareddy ◽  
I-Kuen Tsai ◽  
Yi-Fang Tsai ◽  
...  
Keyword(s):  
High Resolution ◽  
Hydride Transfer ◽  
Pyrroloquinoline Quinone ◽  
Methanol Dehydrogenase ◽  
Structural Studies ◽  
Methylococcus Capsulatus ◽  
X Ray

scholarly journals Синтез, структура и магнитные свойства многослойных наногетероструктур Fe|MgO|Cr|MgO|Fe

2021 ◽  
Vol 63 (9) ◽  
pp. 1306
Author(s):  
Е.М. Якунина ◽  
Е.А. Кравцов ◽  
Yu.N. Khaydukov ◽  
Н.О. Антропов ◽  
В.В. Проглядо
Keyword(s):  
Magnetic Properties ◽  
High Resolution ◽  
Exchange Interaction ◽  
Magnetic Moments ◽  
Ferromagnetic Material ◽  
Structural Studies ◽  
X Ray ◽  
Structural And Magnetic Properties ◽  
Metal Layers

Layered nanoheterostructures Fe | MgO | Cr | MgO | Fe is an artificial ferromagnetic material in which the exchange interaction of the magnetic moments of Fe layers through intermediate dielectric and metal layers can lead to magnetic configurations that are not realized in the well-studied Fe | MgO | Fe and Fe | Cr | Fe. In this work, we investigated the correlations of the structural and magnetic properties of layered nanoheterostructures Fe (10 nm) | MgO (1.5 nm) | Cr (t nm) | MgO (1.5 nm) | Fe (7 nm) (thickness t = 0.9 and 1.8 nm). Structural studies performed using X-ray diffractometry and high-resolution reflectometry confirmed the formation of a textured structure and revealed its well-defined layered character with sharp interlayer boundaries.

Structural studies of trigonal lamellar particles of gold and silver

1993 ◽  
Vol 440 (1910) ◽  
pp. 589-609 ◽  
Keyword(s):  
Electron Microscopy ◽  
High Resolution ◽  
High Resolution Electron Microscopy ◽  
Structural Studies ◽  
Growth Mechanisms ◽  
X Ray Diffraction ◽  
Structural Requirements ◽  
Plan View ◽  
X Ray ◽  
Resolution Electron

The results of detailed structural studies of trigonal lamellar particles of both gold and silver are presented. The particles have been characterized both in sol by means of optical spectroscopy and powder X-ray diffraction and ex sol using high resolution electron microscopy in both plan view and profile imaging modes. The results of these studies have indicated that the particles have a trigonal outline and are shortened along a ≺111≻ direction to give a plate-like morphology. The presence of small numbers of parallel {111} twin planes has also been confirmed and used to explain the presence of the formally forbidden ⅓{422} reflections observed in plan view. The precise structural requirements for the observation of such reflections has also been confirmed using multislice calculations. Possible growth mechanisms for these particles are also discussed.

High-Temperature Structural Studies of SrPbO3 and BaPbO3

2002 ◽  
Vol 55 (8) ◽  
pp. 543 ◽  
Author(s):  
J. R. Hester ◽  
C. J. Howard ◽  
B. J. Kennedy ◽  
R. Macquart
Keyword(s):  
Phase Transitions ◽  
High Temperature ◽  
High Resolution ◽  
Powder Diffraction ◽  
Room Temperature ◽  
Structural Studies ◽  
X Ray ◽  
First Order

High-resolution X-ray powder diffraction studies have shown BaPbO3 to transform from an orthorhombic Imma structure at room temperature, through an intermediate I4/mcm phase, to a cubic Pm3–mstructure above 500�C. The Imma to I4/mcm transition is first order and the I4/mcm–Pm3–m transition for BaPbO3 is tricritical in nature. We find no evidence for any phase transitions in SrPbO3 up to 760�C, the structure remaining in Pnma from room temperature to 760�C.

Structure of sputter-deposited amorphous Pd-Si alloy studied by High Resolution Electron Microscopy

1990 ◽  
Vol 48 (4) ◽  
pp. 126-127
Author(s):  
Yoshihiko Hirotsu ◽  
Kazunori Anazawa ◽  
Sigemaro Nagakura
Keyword(s):  
Electron Microscopy ◽  
High Resolution ◽  
Amorphous Alloys ◽  
High Resolution Electron Microscopy ◽  
Structural Studies ◽  
X Ray ◽  
Resolution Electron ◽  
Medium Range ◽  
Atomic Distance ◽  
Sputter Deposited

Recent structural studies of amorphous alloys by precise X-ray and neutron diffraction, Mossbauer spectroscopy and NMR have shown an atomic ordering developing beyond the first neighbor atomic distance, which is called a medium range ordering (MRO) of atoms in amorphous alloys. Lattice fringe images extending in a range of 1 to 2 nm have been observed in amorphous alloys by high resolution electron microscopy(HREM), indicating a possible formation of the MRO structures. In our HREM study of amorphous Pd77.5Cu6Si16.5 alloy ribbons, MRO domains with α-Pd-like structure were observed under the most appropriate underfocus condition. For more detailed understanding of MRO structure, it is necessary to calculate HREM images for possible MRO models and compare them with observed ones. In this study, we calculated HREM images for an amorphous Pd80Si20 with (1) a dense random packing(DRP) structure, (2) a FCC MRO structure( a FCC cluster embedded in the DRP structure) and (3) an icosahedral MRO structure( an icosahedral cluster embedded in the DRP structure).

X-ray and high resolution selenium-77 solid state NMR spectroscopy as complementary probes to structural studies of organophosphorus diselenides

1998 ◽  
Vol 11 (3-4) ◽  
pp. 215-224 ◽  
Author(s):  
Marek J Potrzebowski ◽  
Jarołsaw Błaszczyk ◽  
Wiesław R Majzner ◽  
Michał W Wieczorek ◽  
Janina Baraniak ◽  
...  
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
High Resolution ◽  
Solid State Nmr ◽  
Structural Studies ◽  
X Ray ◽  
Solid State Nmr Spectroscopy
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