scholarly journals Methyl Hexadecyl Viologen Inclusion in Cucurbit[8]uril: Coexistence of Three Host–Guest Complexes with Different Stoichiometry in a Highly Hydrated Crystal

2021 ◽  
Author(s):  
Neal Hickey ◽  
Barbara Medagli ◽  
Alessandro Pedrini ◽  
Roberta Pinalli ◽  
Enrico Dalcanale ◽  
...  
Keyword(s):  
Hydrated Crystal

Electron microscopy of rabbit FC crystals

1983 ◽  
Vol 41 ◽  
pp. 730-731
Author(s):  
Robert A. Grant ◽  
Laura L. Degn ◽  
Wah Chiu ◽  
John Robinson
Keyword(s):  
Electron Microscopy ◽  
High Resolution ◽  
High Resolution Electron Microscopy ◽  
Molecular Replacement ◽  
X Ray ◽  
X Ray Crystallography ◽  
Resolution Electron ◽  
Replacement Technique ◽  
Hydrated Crystal ◽  
Molecular Structure Analysis

Proteolytic digestion of the immunoglobulin IgG with papain cleaves the molecule into an antigen binding fragment, Fab, and a compliment binding fragment, Fc. Structures of intact immunoglobulin, Fab and Fc from various sources have been solved by X-ray crystallography. Rabbit Fc can be crystallized as thin platelets suitable for high resolution electron microscopy. The structure of rabbit Fc can be expected to be similar to the known structure of human Fc, making it an ideal specimen for comparing the X-ray and electron crystallographic techniques and for the application of the molecular replacement technique to electron crystallography. Thin protein crystals embedded in ice diffract to high resolution. A low resolution image of a frozen, hydrated crystal can be expected to have a better contrast than a glucose embedded crystal due to the larger density difference between protein and ice compared to protein and glucose. For these reasons we are using an ice embedding technique to prepare the rabbit Fc crystals for molecular structure analysis by electron microscopy.

Structural Change of an α-Gel (α-Form Hydrated Crystal) Induced by Temperature and Shear Flow in an Oleic Acid Based Gemini Surfactant System

Langmuir ◽  
2020 ◽  
Vol 36 (17) ◽  
pp. 4695-4701 ◽  
Author(s):  
Tadashi Sugahara ◽  
Masaaki Akamatsu ◽  
Hiroki Iwase ◽  
Yuichiro Takamatsu ◽  
Kenichi Sakai ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Structural Change ◽  
Shear Flow ◽  
Gemini Surfactant ◽  
Surfactant System ◽  
Hydrated Crystal

Formation of α-gel (α-form hydrated crystal) by oleic acid-based gemini surfactant

2019 ◽  
Vol 583 ◽  
pp. 123944 ◽  
Author(s):  
Tadashi Sugahara ◽  
Yuichiro Takamatsu ◽  
Masaaki Akamatsu ◽  
Kenichi Sakai ◽  
Hideki Sakai
Keyword(s):  
Oleic Acid ◽  
Gemini Surfactant ◽  
Hydrated Crystal

scholarly journals Adsorption and Lubrication of α-Gel (α-Form Hydrated Crystal) Dispersion at Solid/Liquid Interfaces

2021 ◽  
Author(s):  
Kenichi Sakai ◽  
Rina Ishii ◽  
Takanori Saito ◽  
Masaaki Akamatsu ◽  
Takaya Sakai ◽  
...  
Keyword(s):  
Liquid Interfaces ◽  
Hydrated Crystal ◽  
Crystal Dispersion ◽  
Solid Liquid

Structure and conformation of the hydrate of 8,11-dihydroxypentacyclo[5.4.0.02,6.03,10.05,9]undecane-8,11-carbolactam

1996 ◽  
Vol 52 (5) ◽  
pp. 838-841 ◽  
Author(s):  
H. G. Kruger ◽  
F. J. C. Martins ◽  
A. M. Viljoen ◽  
J. C. A. Boeyens ◽  
L. M. Cook ◽  
...  
Keyword(s):  
Random Distribution ◽  
Crystallographic Analysis ◽  
Crystalline Modification ◽  
Functional Region ◽  
Cage Compound ◽  
Molecular Arrangement ◽  
Water Of Hydration ◽  
Hydrated Crystal ◽  
Network Of Hydrogen Bonds ◽  
Bond Network

The crystalline modification of the title compound from aqueous medium depends critically on factors such as concentration and pH. Crystallographic analysis of a hydrated crystal showed that this effect related to the formation of an extended network of hydrogen bonds that requires the water molecule, as H2O, to be hydrogen bonded three ways. The crystals are monoclinic, C2/c, a = 10.030 (1), b = 9.840 (2), c = 21.625 (2) Å, β = 90.87 (1)°, Z = 8. The hydrogen-bond network between water of hydration and the functional groups on the cage compound has identical geometries for both chiralities and during crystallization there is hence no discrimination between enantiomers. Both forms are thus accommodated at the same sites in random distribution, causing disorder of the molecular fragment remote from the functional region. The final arrangement is similar to a hydrated solid solution of the two enantiomers with an IR spectrum sufficiently different from the anhydrous form to suggest a different molecular arrangement.

scholarly journals Large polarization but small electron transfer for water around Al3+ in a highly hydrated crystal

2014 ◽  
Vol 16 (20) ◽  
pp. 9351 ◽  
Author(s):  
Pavlin D. Mitev ◽  
Imre Bakó ◽  
Anders Eriksson ◽  
Kersti Hermansson
Keyword(s):  
Electron Transfer ◽  
Hydrated Crystal

scholarly journals α-Gel (α-Form Hydrated Crystal) Prepared by Eco-Friendly Cationic Surfactant

2020 ◽  
Vol 69 (11) ◽  
pp. 1403-1409
Author(s):  
Takanori Saito ◽  
Rina Ishii ◽  
Masaaki Akamatsu ◽  
Takaya Sakai ◽  
Kenichi Sakai ◽  
...  
Keyword(s):  
Cationic Surfactant ◽  
Hydrated Crystal

Triglycine (GGG) Adopts a Polyproline II (pPII) Conformation in Its Hydrated Crystal Form: Revealing the Role of Water in Peptide Crystallization

2021 ◽  
Vol 12 (34) ◽  
pp. 8416-8422
Author(s):  
Mingxia Guo ◽  
Ian Rosbottom ◽  
Lina Zhou ◽  
Chin W. Yong ◽  
Ling Zhou ◽  
...  
Keyword(s):  
Crystal Form ◽  
Polyproline Ii ◽  
Hydrated Crystal
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