Variable Stoichiometry Cocrystals: Occurrence and Significance.

CrystEngComm ◽  
2021 ◽  
Author(s):  
Bipul Sarma ◽  
Basanta Saikia ◽  
Debabrat Pathak
Keyword(s):  
Variable Stoichiometry

The occurrence of variable stoichiometry cocrystals offers the prospect to acquire more solid forms of the same system. The control of stoichiometry is extremely important concerning the purity and intellectual...

Variable stoichiometry of proton pumping by the mitochondrial respiratory chain

Nature ◽  
1987 ◽  
Vol 329 (6135) ◽  
pp. 170-172 ◽  
Author(s):  
Michael P. Murphy ◽  
Martin D. Brand
Keyword(s):  
Respiratory Chain ◽  
Mitochondrial Respiratory Chain ◽  
Proton Pumping ◽  
Variable Stoichiometry ◽  
Mitochondrial Respiratory

Variable Stoichiometry during the Laccase-Catalyzed Oxidation of Aqueous Phenol

2007 ◽  
Vol 23 (2) ◽  
pp. 389-397 ◽  
Author(s):  
S. Kurniawati ◽  
J.A. Nicell
Keyword(s):  
Catalyzed Oxidation ◽  
Variable Stoichiometry

The reaction of iodine with lithium tri-tert-butoxyaluminohydride. A reaction with variable stoichiometry unsuitable for analytical standardization

1977 ◽  
Vol 55 (20) ◽  
pp. 3616-3619 ◽  
Author(s):  
Donald C. Wigfield ◽  
Frederick W. Gowland
Keyword(s):  
Spectral Analysis ◽  
Liquid Chromatography ◽  
Gas Liquid Chromatography ◽  
Titrimetric Method ◽  
Variable Stoichiometry

Solutions of lithium tri-tert-butoxyaluminohydride (LTBA) have been standardized by reduction of cyclohexanone, followed by gas–liquid chromatography (glc) and/or spectral analysis of the extent of reaction. These results are compared with the standard titrimetric analysis of LTBA by iodine, to determine whether the standardizing equation is[Formula: see text]Or[Formula: see text]It is clear that in fact both of these reactions occur, with [5] predominating at low hydride to iodine ratios, and [3] becoming increasingly significant when the hydride and iodine concentrations become comparable. The usual titrimetric method of standardizing LTBA is therefore essentially unusable.

A gallic acid–succinimide co-crystal landscape: polymorphism, pseudopolymorphism, variable stoichiometry co-crystals and concomitant growth of non-solvated and solvated co-crystals

CrystEngComm ◽  
2016 ◽  
Vol 18 (18) ◽  
pp. 3191-3203 ◽  
Author(s):  
Ramanpreet Kaur ◽  
Suryanarayan Cherukuvada ◽  
Praveen B. Managutti ◽  
Tayur N. Guru Row
Keyword(s):  
Gallic Acid ◽  
Selective Formation ◽  
Variable Stoichiometry ◽  
Design Aspect

A design aspect for selective formation of diverse solid forms such as solvates, hydrates and anhydrous forms has been successfully investigated in a gallic acid–succinimide co-crystal landscape.

Variable stoichiometry of proton: Lactose symport in cells

1981 ◽  
Vol 12 (3) ◽  
pp. 237-240 ◽  
Author(s):  
B TENBRINK ◽  
J LOLKEMA ◽  
K HELLINGWERF ◽  
W KONINGS
Keyword(s):  
Variable Stoichiometry ◽  
In Cells

Na+-K+ pump stoichiometry and basolateral membrane permeability of frog corneal epithelium

1986 ◽  
Vol 250 (5) ◽  
pp. F850-F859 ◽  
Author(s):  
O. A. Candia ◽  
P. Cook
Keyword(s):  
Membrane Permeability ◽  
Amphotericin B ◽  
Corneal Epithelium ◽  
Flow Condition ◽  
Basolateral Membrane ◽  
Flux Ratio ◽  
Na Currents ◽  
Static Head ◽  
K Permeability ◽  
Variable Stoichiometry

The Na+-K+ pump flux ratio and the Na+ and K+ permeability of the basolateral membrane of the isolated frog corneal epithelium were studied with the aid of microelectrodes by analyzing the effects of ouabain, Ba2+, and amphotericin B. The experiments were done in Cl(-)-free solutions, a situation that approximates that of static head. Ouabain produced a quick depolarization of the potential difference across the basolateral membrane (PDb) from -72 to -62 mV without a change in resistance. Ba2+ (3 mM) rapidly lowered PDb from -74 to -57 mV and decreased the apical-to-basolateral resistance ratio. The effects of ouabain and Ba2+ were additive. The Na+-K+ flux ratio at the pump was calculated to be 1.78, substantially less than when the tissue is in a level flow condition, suggesting a variable stoichiometry. The K+ and Na+ resistances of the basolateral membrane were 15.7 and 5.5 k omega X cm2, respectively, allowing K+ and Na+ currents that approximately matched those produced by the Na+-K+ pump. The resistance of the basolateral membrane (4.0 k omega X cm2) was double that reported in Cl(-)-rich solutions, suggesting that Cl- contributes to the conductance of this membrane.

Solubility Metastable Zone Width Measurement and Crystal Growth of the 1:1 Benzoic Acid/Isonicotinamide Cocrystal in Solutions of Variable Stoichiometry

2010 ◽  
Vol 99 (9) ◽  
pp. 3779-3786 ◽  
Author(s):  
Sarah Boyd ◽  
Kevin Back ◽  
Keith Chadwick ◽  
Roger J. Davey ◽  
Colin C. Seaton
Keyword(s):  
Crystal Growth ◽  
Benzoic Acid ◽  
Metastable Zone Width ◽  
Zone Width ◽  
Width Measurement ◽  
Metastable Zone ◽  
Variable Stoichiometry

Hydrogen Bond Synthons in the Interplay of Solubility and Membrane Permeability/Diffusion in Variable Stoichiometry Drug Cocrystals

2015 ◽  
Vol 15 (11) ◽  
pp. 5593-5603 ◽  
Author(s):  
Basanta Saikia ◽  
Pranita Bora ◽  
Rajiv Khatioda ◽  
Bipul Sarma
Keyword(s):  
Hydrogen Bond ◽  
Membrane Permeability ◽  
Variable Stoichiometry
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