Anisotropic etching in low-concentration KOH: effects of surfactant concentration

2015 ◽  
Vol 10 (4) ◽  
pp. 224-228 ◽  
Author(s):  
Prem Pal ◽  
Yan Xing ◽  
Subhomoy Haldar ◽  
Kazuo Sato ◽  
Akarapu Ashok
Keyword(s):  
Surfactant Concentration ◽  
Anisotropic Etching ◽  
Low Concentration

Well-controlled and stable emulsion ATRP of MMA with low surfactant concentration using surfactant–ligand design as the copper capture agent

2015 ◽  
Vol 6 (15) ◽  
pp. 2837-2843 ◽  
Author(s):  
Yipeng Wei ◽  
Pingwei Liu ◽  
Wen-Jun Wang ◽  
Bo-Geng Li ◽  
Shiping Zhu
Keyword(s):  
Surfactant Concentration ◽  
Ligand Design ◽  
Stable Emulsion ◽  
Low Concentration ◽  
The Stability ◽  
Stability Of Emulsion

In this work, we improved the stability of emulsion ATRP at a low concentration of the emulsifier with our designed Cu capture agent.

Surfactant-Enhanced Washing of Aged PAH Contaminated Soils: Comparison between Nonionic Surfactant and Anionic Surfactant

2014 ◽  
Vol 522-524 ◽  
pp. 316-321 ◽  
Author(s):  
He Lian Li ◽  
Rong Hui Qu ◽  
Xue Mei Han ◽  
Jia Jun Chen
Keyword(s):  
Critical Micelle Concentration ◽  
Aqueous Solutions ◽  
Anionic Surfactant ◽  
Contaminated Soil ◽  
Contaminated Soils ◽  
Surfactant Concentration ◽  
Nonionic Surfactants ◽  
Low Concentration ◽  
Removal Efficiencies ◽  
Triton X

Nonionic surfactants Triton X-100 (TX100), Triton X-305 and anionic surfactant SDS were used to desorb PAHs from contaminated soil. The surfactant loss due to sorption/ precipitation and PAH removal efficiency by each surfactant were evaluated. Due to sorption/precipitation, the apparent critical micelle concentration (CMCsoil) values for the 3 surfactants are 1.3-3.8 times their corresponding CMC values in aqueous solutions. The maximal surfactant loss follows the order of SDS>>TX100>TX305. The anionic surfactant SDS is quite different from nonionic surfactants TX100 and TX305 in PAH removal. SDS can effectively remove 3-ring PAHs at very low concentration, but is not so efficient for 5 or 6-ring PAHs. While for nonionic surfactants TX100 and TX305, the removal efficiencies of PAHs increased with increasing surfactant concentration. Nonionic surfactants at low concentration cannot facilitate PAH desorption, but enhance the retardation of PAHs in soil. While anionic surfactant SDS enhanced PAH desorption at all the concentrations.

161. Methodological Issues in Ultra-Low Concentration Aerosol Sampling

2003 ◽  
Author(s):  
H. McCutcheon ◽  
D. Johnson ◽  
N. Esmen ◽  
R. Clinkenbeard
Keyword(s):  
Aerosol Sampling ◽  
Methodological Issues ◽  
Low Concentration

3-iodothyronamine (T1AM) is taken up and rapidly metabolized in cell culture medium only at low concentration

2020 ◽  
Author(s):  
Federica Saponaro ◽  
Marco Borsò ◽  
Sara Verlotta ◽  
Lavinia Bandini ◽  
Alessandro Saba ◽  
...  
Keyword(s):  
Cell Culture ◽  
Culture Medium ◽  
Cell Culture Medium ◽  
Low Concentration
Sign in / Sign up

Export Citation Format

Share Document