Unambiguous Structure Characterization of a DNA−RNA Triple Helix by15N- and13C-Filtered NOESY Spectroscopy†

Biochemistry ◽  
1996 ◽  
Vol 35 (6) ◽  
pp. 1733-1739 ◽  
Author(s):  
Maria J. P. van Dongen ◽  
Hans A. Heus ◽  
Sybren S. Wymenga ◽  
Gijs A. van der Marel ◽  
Jacques H. van Boom ◽  
...  
Keyword(s):  
Triple Helix ◽  
Structure Characterization ◽  
Rna Triple Helix

Structural Characterization of an Intramolecular RNA Triple Helix by NMR Spectroscopy

1995 ◽  
Vol 233 (2) ◽  
pp. 544-553 ◽  
Author(s):  
Roscoe Klinck ◽  
Jean Liquier ◽  
Eliane Taillandier ◽  
Catherine Gouyette ◽  
Tarn Huynh-Dinh ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Structural Characterization ◽  
Triple Helix ◽  
Rna Triple Helix

Characterization of microwave-sintered ceramic composites

1993 ◽  
Vol 51 ◽  
pp. 1136-1137
Author(s):  
X. Zhang ◽  
Y. Pan ◽  
T.T. Meek
Keyword(s):  
Matrix Material ◽  
Maximum Output Power ◽  
Ceramic Matrix Composite ◽  
Ceramic Composites ◽  
Processing Technique ◽  
Structure Characterization ◽  
Alumina Powder ◽  
Maximum Output ◽  
Sintered Ceramic

Industrial microwave heating technology has emerged as a new ceramic processing technique. The unique advantages of fast sintering, high density, and improved materials properties makes it superior in certain respects to other processing methods. This work presents the structure characterization of a microwave sintered ceramic matrix composite.Commercial α-alumina powder A-16 (Alcoa) is chosen as the matrix material, β-silicon carbide whiskers (Third Millennium Technologies, Inc.) are used as the reinforcing element. The green samples consisted of 90 vol% Al2O3 powder and 10 vol% ultrasonically-dispersed SiC whiskers. The powder mixture is blended together, and then uniaxially pressed into a cylindrical pellet under a pressure of 230 MPa, which yields a 52% green density. The sintering experiments are carried out using an industry microwave system (Gober, Model S6F) which generates microwave radiation at 2.45 GHz with a maximum output power of 6 kW. The composites are sintered at two different temperatures (1550°C and 1650°C) with various isothermal processing time intervals ranging from 10 to 20 min.

scholarly journals Common Phase and Structure Misidentifications in High-Resolution TEM Characterization of Perovskite Materials

2020 ◽  
Vol 6 (1) ◽  
pp. 1
Author(s):  
Yu-Hao Deng
Keyword(s):  
High Resolution ◽  
Research Field ◽  
Structure Characterization ◽  
Phase Identification ◽  
Lead Iodide ◽  
Perovskite Materials ◽  
High Resolution Tem ◽  
Methylammonium Lead Iodide ◽  
Dose Imaging

High-resolution TEM (HRTEM) is a powerful tool for structure characterization. However, methylammonium lead iodide (MAPbI3) perovskite is highly sensitive to electron beams and easily decomposes into lead iodide (PbI2). Misidentifications, such as PbI2 being incorrectly labeled as perovskite, are widely present in HRTEM characterization and would negatively affect the development of perovskite research field. Here misidentifications in MAPbI3 perovskite are summarized, classified, and corrected based on low-dose imaging and electron diffraction (ED) simulations. Corresponding crystallographic parameters of intrinsic tetragonal MAPbI3 and the confusable hexagonal PbI2 are presented unambiguously. Finally, the method of proper phase identification and some strategies to control the radiation damage in HRTEM are provided. This warning paves the way to avoid future misinterpretations in HRTEM characterization of perovskite and other electron beam-sensitive materials.

Preparation and Structure Characterization of β-BaB2O4Nanowires

2009 ◽  
Vol 38 (5) ◽  
pp. 500-501 ◽  
Author(s):  
Jiang Zhang ◽  
Shaojun Liang ◽  
Guiping He
Keyword(s):  
Structure Characterization

scholarly journals Isolation and chemical structure characterization of enzymatic lignin frompopulus deltoidswood

2013 ◽  
Vol 130 (1) ◽  
pp. 710-710
Author(s):  
Ali Abdulkhani ◽  
Alinaghi Karimi ◽  
Ahmad Mirshokraie ◽  
Yahya Hamzeh ◽  
Nathalie Marlin ◽  
...  
Keyword(s):  
Chemical Structure ◽  
Structure Characterization
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