Singularities in the physicochemical properties of spontaneous AOT-BHD unilamellar vesicles in comparison with DOPC vesicles

2015 ◽  
Vol 17 (26) ◽  
pp. 17112-17121 ◽  
Author(s):  
Cristian C. Villa ◽  
N. Mariano Correa ◽  
Juana J. Silber ◽  
Fernando Moyano ◽  
R. Darío Falcone
Keyword(s):  
Physicochemical Properties ◽  
Electron Donor ◽  
High Viscosity ◽  
Unilamellar Vesicles ◽  
Donor Capacity

AOT-BHD vesicles present a bilayer completely different to the traditional DOPC vesicles, with low polarity, high viscosity and more electron donor capacity.

scholarly journals Subphthalocyanine–tetracyanobuta-1,3-diene–aniline conjugates: stereoisomerism and photophysical properties

2019 ◽  
Vol 10 (48) ◽  
pp. 10997-11005 ◽  
Author(s):  
Kim A. Winterfeld ◽  
Giulia Lavarda ◽  
Julia Guilleme ◽  
Dirk M. Guldi ◽  
Tomás Torres ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Electron Donor ◽  
Photophysical Properties ◽  
Donor Acceptor

We report the stereoisomerism and physicochemical properties of two novel electron donor–acceptor conjugates based on subphthalocyanines decorated at their peripheral, or peripheral/axial positions with multiple tetracyanobutadiene–aniline moieties.

scholarly journals Listeria monocytogenes Scott A: Cell Surface Charge, Hydrophobicity, and Electron Donor and Acceptor Characteristics under Different Environmental Growth Conditions

1999 ◽  
Vol 65 (12) ◽  
pp. 5328-5333 ◽  
Author(s):  
Romain Briandet ◽  
Thierry Meylheuc ◽  
Catherine Maher ◽  
Marie Noëlle Bellon-Fontaine
Keyword(s):  
Listeria Monocytogenes ◽  
Cell Surface ◽  
Physicochemical Properties ◽  
Surface Charge ◽  
Electron Donor ◽  
Growth Temperature ◽  
Growth Media ◽  
A Cells ◽  
Donor And Acceptor ◽  
Electron Donor And Acceptor

ABSTRACT We determined the variations in the surface physicochemical properties of Listeria monocytogenes Scott A cells that occurred under various environmental conditions. The surface charges, the hydrophobicities, and the electron donor and acceptor characteristics of L. monocytogenes Scott A cells were compared after the organism was grown in different growth media and at different temperatures; to do this, we used microelectrophoresis and the microbial adhesion to solvents method. Supplementing the growth media with glucose or lactic acid affected the electrical, hydrophobic, and electron donor and acceptor properties of the cells, whereas the growth temperature (37, 20, 15, or 8°C) primarily affected the electrical and electron donor and acceptor properties. The nonlinear effects of the growth temperature on the physicochemical properties of the cells were similar for cells cultivated in two different growth media, but bacteria cultivated in Trypticase soy broth supplemented with 6 g of yeast extract per liter (TSYE) were slightly more hydrophobic than cells cultivated in brain heart infusion medium (P < 0.05). Adhesion experiments conducted withL. monocytogenes Scott A cells cultivated in TSYE at 37, 20, 15, and 8°C and then suspended in a sodium chloride solution (1.5 × 10−1 or 1.5 × 10−3 M NaCl) confirmed that the cell surface charge and the electron donor and acceptor properties of the cells had an influence on their attachment to stainless steel.

scholarly journals Optimization of Extraction Condition and Characterization of Malva Verticillata Root Bark Mucilage

2018 ◽  
Vol 10 (2) ◽  
pp. 1
Author(s):  
P. C. Korir ◽  
A. M. Salim ◽  
J. O. Odalo ◽  
W. Waudo ◽  
L. M. Gitu ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Plant Material ◽  
High Viscosity ◽  
High Yield ◽  
Root Bark ◽  
High Tendency ◽  
Low Protein ◽  
Aqueous Solvent ◽  
Significant Difference

The study aimed at optimizing the extraction conditions and establishing the physicochemical properties of the mucilage obtained from root bark of Malva verticillata. Effects of temperature, time, particle size and amount of water as a solvent on the yield and composition of mucilage were established. Micrometric, physical, chemical and structural properties were used to characterise the extracted mucilage. Result showed significant correlation between extraction conditions and mucilage yield. Low temperature and short extraction time results into pharmaceutically valuable mucilage with low protein content, high viscosity and good dispersion in aqueous solvent. Large and small size particles of the plant material results into low mucilage yield without significant difference (p=0.054). The mucilage shows mixed cohesiveness with less tendencies to flow. It exhibits vibration bands in FTIR that are associated with the presence of polysaccharides and proteins. The mucilage contains 2.65% protein, 13.83% inorganics, 1.85% fats, and the rest carbohydrates. High extractive value ˃80% and moisture content ˃12% implies that mucilage has high tendency to microbial attack. Optimized extraction conditions results into high yield of the mucilage with the same physicochemical properties and mineral composition regardless of the plant material sampling sites.

scholarly journals Six-Membered N-Heterocyclic Carbenes with a 1,1′-Ferrocenediyl Backbone: Bulky Ligands with Strong Electron-Donor Capacity and Unusual Non-Innocent Character

2009 ◽  
Vol 2009 (31) ◽  
pp. 4607-4612 ◽  
Author(s):  
Ulrich Siemeling ◽  
Christian Färber ◽  
Michael Leibold ◽  
Clemens Bruhn ◽  
Philipp Mücke ◽  
...  
Keyword(s):  
Electron Donor ◽  
Heterocyclic Carbenes ◽  
Strong Electron ◽  
Donor Capacity ◽  
Bulky Ligands
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