Conformational transitions of immunoglobulin fragment Fc(t) incited by alkyl sulfates of various hydrophobic chain lengths

1971 ◽  
Vol 229 (3) ◽  
pp. 631-641 ◽  
Author(s):  
Pak Kai Jane Lee ◽  
Bruno Jirgensons
Keyword(s):  
Conformational Transitions ◽  
Hydrophobic Chain ◽  
Alkyl Sulfates ◽  
Chain Lengths

Bis-imidazolium salts with alkyl sulfates as counterions: synthesis and liquid crystalline properties

2017 ◽  
Vol 41 (19) ◽  
pp. 11113-11124 ◽  
Author(s):  
Theodora A. Ilincă ◽  
Iuliana Pasuk ◽  
Viorel Cîrcu
Keyword(s):  
Liquid Crystalline ◽  
Alkyl Sulfate ◽  
Imidazolium Salts ◽  
Alkyl Sulfates ◽  
Chain Lengths

A series of flexibly linked bis-imidazolium salts with alkyl sulfate anions having different chain lengths (10, 12, 14) was investigated for their thermotropic behavior.

scholarly journals Adsorption and Corrosion Performance of New Cationic Gemini Surfactants Derivatives of Fatty Amido Ethyl Aminium Chloride with Ester Spacer for Mild Steel in Acidic Solutions

Materials ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 2790
Author(s):  
Nashwa S. Bin-Hudayb ◽  
Entsar E. Badr ◽  
M.A. Hegazy
Keyword(s):  
Mild Steel ◽  
Gemini Surfactants ◽  
Ester Group ◽  
Charge Transfer Resistance ◽  
Maximum Efficiency ◽  
Transfer Resistance ◽  
Cationic Gemini Surfactants ◽  
Hydrophobic Chain ◽  
Inhibition Performance ◽  
Chain Lengths

Three new cationic gemini surfactants with ester spacer type 2-2′-(ethane-1,2-diyl bis(oxy)) bis(N-(2-alkanamidoethyl)-N,N-dimethyl-2-oxoethan-1-aminium)) dichloride) (CGSES12, CGSES14 and CGSES16), based on N,N-dimethyl fatty amido ethylamine, were produced. These gemini quaternary ammonium salts were synthesized using a three-step reaction method, starting from th/e condensation of the fatty acid chloride (RCOCl) of various hydrophobic chain lengths (R, C11H23, C13H27, C15H31) with N,N-dimethyl ethylene diamine, followed by the quaternization of the tertiary amino group formed with the spacer of the ester group formed in the second step. The chemical configuration of the surfactants was established by FT-IR, 1HNMR, 13CNMR and Mass spectroscopies. The inhibition performance of three surfactants was studied by weight loss and electrochemical measurements. The results show that CGSES12, CGSES14 and CGSES16 behave as effective inhibitors and surface agents. The maximum efficiency was higher than 94% at 2.5 mM, and the inhibition order was CGSES16 > CGSES14 > CGSES12. This was due to the increment in hydrophobicity of the gemini surfactants. Their adsorption on a mild steel surface followed the Langmuir isotherm. CGSES12, CGSES14 and CGSES16 can be considered mixed-type inhibitors. The presence of CGSES12, CGSES14 and CGSES16 increased charge transfer resistance and decreased the corrosion rate. The adsorption focused on heteroatoms and the surface properties of cationic gemini surfactants.

Environmental Protection Performance of Anti-Collapse Agents with Different Hydrophobic Chain Lengths

2020 ◽  
Vol 56 (3) ◽  
pp. 363-372
Author(s):  
Yuan-Zhi Qu ◽  
Kai-Ping Tian ◽  
Ming-Yi Deng ◽  
Ren Wang ◽  
Jun Pu ◽  
...  
Keyword(s):  
Environmental Protection ◽  
Hydrophobic Chain ◽  
Chain Lengths

Nanoparticle formation by laser ablation of perylene microcrystals in aqueous solutions of alkyl sulfates with different alkyl chain lengths

2020 ◽  
Vol 757 ◽  
pp. 137863
Author(s):  
Kenzo Kiyosawa ◽  
Takafumi Arakaki ◽  
Takayuki Terukina ◽  
Norito Yasumori ◽  
Kosei Koshima ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Aqueous Solutions ◽  
Alkyl Chain ◽  
Nanoparticle Formation ◽  
Alkyl Sulfates ◽  
Chain Lengths

Effect of Hydrophilic- and Hydrophobic-Chain Lengths on the Phase Behavior of A−B-type Silicone Surfactants in Water

2001 ◽  
Vol 105 (23) ◽  
pp. 5419-5426 ◽  
Author(s):  
Hironobu Kunieda ◽  
Md. Hemayet Uddin ◽  
Makiko Horii ◽  
Haruhiko Furukawa ◽  
Asao Harashima
Keyword(s):  
Phase Behavior ◽  
Silicone Surfactants ◽  
Hydrophobic Chain ◽  
Chain Lengths
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