Water-in-Oil Emulsions:  Role of the Solvent Molecular Size on Droplet Interactions

Langmuir ◽  
1997 ◽  
Vol 13 (26) ◽  
pp. 7008-7011 ◽  
Author(s):  
F. Leal-Calderon ◽  
O. Mondain-Monval ◽  
K. Pays ◽  
N. Royer ◽  
J. Bibette
Keyword(s):  
Molecular Size ◽  
Oil Emulsions

Role of Naphthenic Acids in Stabilizing Water-in-Diluted Model Oil Emulsions

2010 ◽  
Vol 114 (23) ◽  
pp. 7710-7718 ◽  
Author(s):  
Song Gao ◽  
Kevin Moran ◽  
Zhenghe Xu ◽  
Jacob Masliyah
Keyword(s):  
Naphthenic Acids ◽  
Oil Emulsions ◽  
Model Oil

scholarly journals Insights into the role of protein molecule size and structure on interfacial properties using designed sequences

2013 ◽  
Vol 10 (80) ◽  
pp. 20120987 ◽  
Author(s):  
Mirjana Dimitrijev Dwyer ◽  
Lizhong He ◽  
Michael James ◽  
Andrew Nelson ◽  
Anton P. J. Middelberg
Keyword(s):  
Stress Response ◽  
Molecular Size ◽  
Interfacial Properties ◽  
Protein Molecule ◽  
Mixed System ◽  
Free Energy Of Adsorption ◽  
Air Water Interface ◽  
A Chain ◽  
Size And Structure

Mixtures of a large, structured protein with a smaller, unstructured component are inherently complex and hard to characterize at interfaces, leading to difficulties in understanding their interfacial behaviours and, therefore, formulation optimization. Here, we investigated interfacial properties of such a mixed system. Simplicity was achieved using designed sequences in which chemical differences had been eliminated to isolate the effect of molecular size and structure, namely a short unstructured peptide (DAMP1) and its longer structured protein concatamer (DAMP4). Interfacial tension measurements suggested that the size and bulk structuring of the larger molecule led to much slower adsorption kinetics. Neutron reflectometry at equilibrium revealed that both molecules adsorbed as a monolayer to the air–water interface (indicating unfolding of DAMP4 to give a chain of four connected DAMP1 molecules), with a concentration ratio equal to that in the bulk. This suggests the overall free energy of adsorption is equal despite differences in size and bulk structure. At small interfacial extensional strains, only molecule packing influenced the stress response. At larger strains, the effect of size became apparent, with DAMP4 registering a higher stress response and interfacial elasticity. When both components were present at the interface, most stress-dissipating movement was achieved by DAMP1. This work thus provides insights into the role of proteins' molecular size and structure on their interfacial properties, and the designed sequences introduced here can serve as effective tools for interfacial studies of proteins and polymers.

Molecular Sieving of Hydrophilic Molecules by the Rectal Intima of the Desert Locust (Schistocerca Gregaria)

1968 ◽  
Vol 48 (3) ◽  
pp. 521-532
Author(s):  
J. E. PHILLIPS ◽  
A. A. DOCKRILL
Keyword(s):  
Molecular Sieve ◽  
Schistocerca Gregaria ◽  
Molecular Size ◽  
Desert Locust ◽  
Rate Of Penetration ◽  
Molecular Sieving ◽  
Uniform Population

1. The permeability of perfused intimal sacs to fourteen non-ionic, hydrophilic molecules of graded molecular size was estimated by radioisotope flux. 2. The rectal cuticle acts as a molecular sieve severely restricting the rate of penetration of molecules with increasing hydrated size. 3. The penetration of test molecules was as predicted by the Renkin equation for a uniform population of water-filled pores having radii of 6.5 Å. 4. The properties of cuticles from the rectum and the integument are compared and the role of the rectal intima in the excretory process in the desert locust is discussed.

scholarly journals Transport of N-Nitrosamines through a Reverse Osmosis Membrane: Role of Molecular Size and Nitrogen Atoms

2018 ◽  
Vol 6 (1) ◽  
pp. 44-48 ◽  
Author(s):  
Takahiro Fujioka ◽  
Hitoshi Kodamatani ◽  
Long D. Nghiem ◽  
Takuji Shintani
Keyword(s):  
Reverse Osmosis ◽  
Molecular Size ◽  
Reverse Osmosis Membrane

The Role of Asphaltenes in Stabilizing Water-in-Crude Oil Emulsions

2007 ◽  
pp. 549-587 ◽  
Author(s):  
Johan Sjöblom ◽  
Pål V. Hemmingsen ◽  
Harald Kallevik
Keyword(s):  
Crude Oil ◽  
Oil Emulsions

The role of molecular size in ligand efficiency

2007 ◽  
Vol 17 (15) ◽  
pp. 4258-4261 ◽  
Author(s):  
Charles H. Reynolds ◽  
Scott D. Bembenek ◽  
Brett A. Tounge
Keyword(s):  
Molecular Size ◽  
Ligand Efficiency

The role of molecular size in antioxidant activity of peptide fractions from Pacific hake (Merluccius productus) hydrolysates

2012 ◽  
Vol 134 (3) ◽  
pp. 1297-1306 ◽  
Author(s):  
Imelda W.Y. Cheung ◽  
Lennie K.Y. Cheung ◽  
Nina Y. Tan ◽  
Eunice C.Y. Li-Chan
Keyword(s):  
Antioxidant Activity ◽  
Molecular Size ◽  
Merluccius Productus ◽  
Peptide Fractions

Role of NOM molecular size on iodo-trihalomethane formation during chlorination and chloramination

2016 ◽  
Vol 102 ◽  
pp. 533-541 ◽  
Author(s):  
Jie Zhang ◽  
Dan-Dan Chen ◽  
Lei Li ◽  
Wen-Wei Li ◽  
Yang Mu ◽  
...  
Keyword(s):  
Molecular Size
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