Synergistic effect of salt ions and water‐soluble amphiphilic compounds of acidic crude oil on surface and IFT

2021 ◽  
Author(s):  
Mohsen Bahaloo Horeh ◽  
Kamran Hassani ◽  
Behzad Rostami ◽  
Salman Ghorbanizadeh
Keyword(s):  
Synergistic Effect ◽  
Crude Oil ◽  
Water Soluble ◽  
Salt Ions ◽  
Amphiphilic Compounds

scholarly journals Persistence and photochemical transformation of water soluble constituents from industrial crude oil and natural seep oil in seawater

2021 ◽  
Vol 165 ◽  
pp. 112049
Author(s):  
Kristen Snyder ◽  
Natalie Mladenov ◽  
William Richardot ◽  
Nathan Dodder ◽  
Azin Nour ◽  
...  
Keyword(s):  
Crude Oil ◽  
Water Soluble ◽  
Photochemical Transformation

scholarly journals Formation of complement subcomponent C1q-immunoglobulin G complex. Thermodynamic and chemical-modification studies

1982 ◽  
Vol 205 (2) ◽  
pp. 361-372 ◽  
Author(s):  
E J Emanuel ◽  
A D Brampton ◽  
D R Burton ◽  
R A Dwek
Keyword(s):  
Immunoglobulin G ◽  
Water Soluble ◽  
Small Peptide ◽  
Experimental Conditions ◽  
Salt Ions ◽  
Salt Range ◽  
Lysine Residues ◽  
Arginine Residues ◽  
Equilibrium Process ◽  
Glycine Ethyl Ester

The interaction between the complement subcomponent C1q and immunoglobulin G was investigated under a variety of experimental conditions. Formation of the subcomponent C1q-immunoglobulin G complex was shown to be an equilibrium process. Thermodynamic studies of the effect of varying the ionic strength indicate that over the salt range 0.15-0.225 M-NaCl the binding of subcomponent C1q to immunoglobulin aggregates releases 9-12 salt ions (Na+ and/or Cl-), illustrating the importance of ionic interactions for the formation of the complex. The effects of small peptide and organic ion inhibitors support this conclusion. Chemical modifications of carboxylate residues on immunoglobulin G by glycine ethyl ester/water-soluble carbodi-imide (up to 12 residues modified per whole molecule of immunoglobulin G) and of lysine residues by acetic anhydride (3 residues per whole molecule of immunoglobulin G) or methyl acetimidate (19 residues per whole molecule of immunoglobulin G) lowered the binding affinity of immunoglobulin for subcomponent C1q. Modification of arginine residues by cyclohexane-1,2-dione-1,2 (14 residues per whole molecule of immunoglobulin G) and of tryptophan by hydroxynitrobenzyl bromide (2 residues per whole molecule of immunoglobulin G), however, had little or no effect. The results are consistent with the proposal that the subcomponent-C1q-binding site on immunoglobulin G is to be found on the last two beta-strands of the Cv2 domain [Burton, Boyd, Brampton, Easterbrook-Smith, Emanuel, Novotny, Rademacher, van Schravendijk, Sternberg & Dwek (1980) Nature (London) 288, 338-344].

The optimum synergistic effect of amphiphilic polymers and the stabilization mechanism of a crude oil emulsion

2017 ◽  
Vol 35 (11) ◽  
pp. 1180-1187 ◽  
Author(s):  
Wanli Kang ◽  
Jiatong Jiang ◽  
Yao Lu ◽  
Derong Xu ◽  
Hairong Wu ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Crude Oil ◽  
Amphiphilic Polymers ◽  
Stabilization Mechanism ◽  
Oil Emulsion

scholarly journals Nephrotoxicological Effect of Water Soluble Fraction of Bonny Light Crude Oil in Wistar Albino Rats

2019 ◽  
pp. 1-9
Author(s):  
Abraham, Chiedozie Nicholas ◽  
J. Udom, Godwin ◽  
C. Patrick-Iwuanyanwu, Kingsley
Keyword(s):  
Crude Oil ◽  
Soluble Fraction ◽  
Water Soluble ◽  
Albino Rats ◽  
Renal Tubules ◽  
Water Soluble Fraction ◽  
Light Crude Oil ◽  
Range Finding ◽  
Effect Of Water ◽  
Wistar Albino Rats

This study evaluated the Nephrotoxic effect of water soluble fraction (WSF) of Bonny Light Crude Oil (BLCO). After preparation of the WSF and a range finding test, the Wistar albino rats were administered three concentrations (25%, 50% and 100%) of WSF of BLCO for 30 and 60days. Data from the study showed that Urea concentration increased significantly (p≤0.05) with increasing dose of BLCO ranging from 14.71 mg/dl in the control to 35.28 mg/dl in the 100% group after 30days and 14.28 mg/dl in the control to 41.08mg/dl in the 100% group after 60days, Creatinine concentration increased significantly (p≤0.05) from 0.22 mg/dl in the control to 0.82mg/dl in the 100% group after 60 days administration while electrolyte (Na, K, Cl) concentration increased significantly (p≤0.05) with increasing dose of BLCO after 60days administration. Histopathological examination of the kidney was characterized by partial partitioning of the glomerular tufts, obliteration of the Bowman’s capsule and distortion of the renal tubules. The findings in this research suggest that WSF of BLCO induced nephrotoxicity.

scholarly journals A water-soluble boronic acid sensor for caffeic acid based on double sites recognition

RSC Advances ◽  
2020 ◽  
Vol 10 (47) ◽  
pp. 28148-28156
Author(s):  
Zhancun Bian ◽  
Guiqian Fang ◽  
Ran Wang ◽  
Dongxue Zhan ◽  
Qingqiang Yao ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Caffeic Acid ◽  
Binding Affinity ◽  
Boronic Acid ◽  
Water Soluble ◽  
Specific Recognition ◽  
Recognition Sites

Herein, the specific recognition of caffeic acid by the double sites boronic acid sensor 5c is reported. The synergistic effect of the two recognition sites greatly improves the binding affinity and selectivity of the sensor.

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