Single-Crystal Matrix Isolation of Biopolymers

1997 ◽  
Vol 119 (43) ◽  
pp. 10565-10566 ◽  
Author(s):  
Jean Chmielewski ◽  
Jerry J. Lewis ◽  
Scott Lovell ◽  
Reena Zutshi ◽  
Phil Savickas ◽  
...  
Keyword(s):  
Single Crystal ◽  
Matrix Isolation ◽  
Crystal Matrix

Optical, Structural and Spectroscopic Characterization of ZnS Nanocrystals Embedded in KBr Single Crystal Matrix Grown by Czochralski Method

2021 ◽  
Vol 406 ◽  
pp. 274-284
Author(s):  
Soria Zeroual ◽  
Mohammed Sadok Mahboub ◽  
Ghani Rihia ◽  
Mourad Mimouni ◽  
Ghougali Mebrouk ◽  
...  
Keyword(s):  
Single Crystal ◽  
Absorption Edge ◽  
Quantum Confinement Effect ◽  
Blue Shift ◽  
Czochralski Method ◽  
Spectroscopic Characterization ◽  
Czochralski Growth ◽  
X Ray Diffraction ◽  
Crystal Matrix ◽  
Zns Nanocrystals

ZnS nanocrystals were embedded in a KBr single crystal matrix using the Czochralski growth technique. The X-ray diffraction, FT-IR and optical spectroscopy revealed the incorporation of ZnS nanocrystals. A blue shift of the absorption edge of the obtained samples has been observed, indicating the quantum confinement effect. The optical band-gap is estimated to be about 4.67 eV. Two excitonic peaks appeared at 300.4 nm and 271 nm. The average nanocrystal size was derived from the optical spectra. Annealing led to a shift in the absorption edge towards longer wavelengths and an increasing of the emissions intensity. Raman lines of the nanoparticles are broader and frequency-shifted compared to those of the bulk crystals. These results show that KBr is a good matrix-host of ZnS nanocrystals, and that the elaborated samples can be used for important technological applications.

Epitaxy of Nb3 Sn Films on Sapphire

1984 ◽  
Vol 37 ◽  
Author(s):  
A. F. Marshall ◽  
F. Hellman ◽  
B. Oh
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Film Thickness ◽  
Single Crystal ◽  
Domain Structure ◽  
High Temperatures ◽  
Defect Structure ◽  
Epitaxial Relationship ◽  
Crystal Matrix ◽  
Transmission Electron

AbstractFilms of Nb3Sn vapor deposited at low rates and high temperatures on (1102) sapphire form an epitaxial <100> single crystal matrix with a domain structure of misoriented regions bounded by low-angle dislocation boundaries. Nucleation of other orientations at the interface result in a highly oriented but polycrystalline film through approximately the first thousand Angstroms of film thickness. After this point random orientations become overgrown by epitaxial <100> regions. At slightly lower temperatures many small <100> grains with a second epitaxial relationship also nucleate at the interface. These rotated grains persist through greater thicknesses than random orientations. The misorientation defect structure of the single crystal matrix is analyzed by transmission electron microscopy.

Intrasectoral Zoning of Proteins and Nucleotides in Simple Crystalline Hosts

2000 ◽  
Vol 620 ◽  
Author(s):  
Miki Kurimoto ◽  
Loyd D. Bastin ◽  
Daniel Fredrickson ◽  
Pamela N. Gustafson ◽  
Sei-Hum Jang ◽  
...  
Keyword(s):  
Single Crystal ◽  
Fluorescent Protein ◽  
Matrix Isolation ◽  
Potassium Dihydrogen Phosphate ◽  
Dihydrogen Phosphate ◽  
Compositional Zoning ◽  
Growth From Solution ◽  
The Matrix ◽  
Adenosine Phosphates ◽  
Green Fluorescent

ABSTRACTOriented gases of biopolymers in simple, single crystal hosts might be used to measure anisotropic molecular properties of analytes that could not otherwise be crystallized. Here we show two types of crystals as examples of the single crystal matrix isolation of biopolymers: green fluorescent protein in α-lactose monohydrate as a model system for studying the kinetic stabilization of biopharmaceuticals, and adenosine phosphates in potassium dihydrogen phosphate, a first step in the matrix isolation of oligonucleotides. In each case, the hosts undergo compositional zoning – both intersectoral and intrasectoral – during growth from solution. Intrasectoral zoning is evident by the selective luminescence of adjacent vicinal slopes of growth active hillocks. Nucleotides furthermore distinguish between symmetry related growth sectors enantioselectively.

Temperature dependence of spectroscopic properties of isolated polydiacetylene chains strained by their monomer single crystal matrix

2007 ◽  
Vol 333 (2-3) ◽  
pp. 254-264 ◽  
Author(s):  
Sylvie Spagnoli ◽  
Jeanne Berrehar ◽  
Jean-Louis Fave ◽  
Michel Schott
Keyword(s):  
Single Crystal ◽  
Temperature Dependence ◽  
Spectroscopic Properties ◽  
Crystal Matrix

ESR study of the phenylseleninyl radical trapped in a single crystal matrix

1980 ◽  
Vol 193 (3) ◽  
pp. 315-320 ◽  
Author(s):  
R. Franzi ◽  
M. Geoffroy ◽  
N. Leray
Keyword(s):  
Single Crystal ◽  
Crystal Matrix

Synthesis and x-ray structure determination of [PPh4]2[Cl3W{.mu.-Se(Cl)}(.mu.-SePh)2WCl3].cntdot.2CH2Cl2: single-crystal ESR study of a mixed-oxidation-state binuclear tungsten(III)-tungsten(IV) complex dispersed in a diamagnetic crystal matrix

1990 ◽  
Vol 29 (18) ◽  
pp. 3290-3293 ◽  
Author(s):  
Joanne M. Ball ◽  
P. Michael Boorman ◽  
James F. Fait ◽  
Heinz Bernhard Kraatz ◽  
John F. Richardson ◽  
...  
Keyword(s):  
Single Crystal ◽  
Oxidation State ◽  
Structure Determination ◽  
X Ray ◽  
Crystal Matrix ◽  
Mixed Oxidation

ESR study of the radical (C6D5)313C produced in a single crystal matrix

1976 ◽  
Vol 42 (2) ◽  
pp. 268-271 ◽  
Author(s):  
T. Berclaz ◽  
M. Geoffroy
Keyword(s):  
Single Crystal ◽  
Crystal Matrix

Electron spin resonance study of the radical Ph2Ṡb trapped in a single crystal matrix

1977 ◽  
Vol 66 (12) ◽  
pp. 5292-5295 ◽  
Author(s):  
M. Geoffroy ◽  
L. Ginet ◽  
E. A. C. Lucken
Keyword(s):  
Electron Spin Resonance ◽  
Single Crystal ◽  
Electron Spin ◽  
Electron Spin Resonance Study ◽  
Crystal Matrix ◽  
Spin Resonance ◽  
Spin Resonance Study

Interaction between Acetyltetralone and Cu(II) Ions: X-Ray Diffraction of the Ligand and Single Crystal ESR Study of the Complex

1983 ◽  
Vol 38 (7) ◽  
pp. 830-834 ◽  
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Single Crystals ◽  
Structure Study ◽  
X Ray Diffraction ◽  
Orthorhombic Space Group ◽  
X Ray ◽  
Crystal Matrix ◽  
Present Complex ◽  
Square Planar

Abstract Single crystals of acetyltetralone grown from a solution containing a small amount of Cu(II) ions are studied by ESR. The corresponding g, 63Cu magnetic and quadrupolar hyperfine tensors are obtained and are consistent with the trapping of a square planar copper(II) complex. X-ray diffraction shows that pure acetyltetralone crystallizes in the orthorhombic space group Pbca (a - 8.893 Å, b = 20.301 Å, c = 10.715 Å). Comparison of the ESR eigenvectors with the bond directions obtained from this crystal structure study shows that the Cu(II) complex experiences some constraint from the crystal matrix. The present complex is a model for one of the complexation sites of tetracyclines.

Nanoparticles of Ni in ZnO single crystal matrix

2013 ◽  
Vol 86 (6) ◽  
Author(s):  
R.P. Borges ◽  
B. Ribeiro ◽  
M.M. Cruz ◽  
M. Godinho ◽  
U. Wahl ◽  
...  
Keyword(s):  
Single Crystal ◽  
Crystal Matrix ◽  
Zno Single Crystal
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