Synthesis and Properties of Quaternary Ammonium Surfactants Based on Alkylamine, Propylene Oxide, and 2-Chloroethanol

2018 ◽  
Vol 21 (2) ◽  
pp. 247-254 ◽  
Author(s):  
Ziyafaddin H. Asadov ◽  
Gulnara A. Ahmadova ◽  
Ravan A. Rahimov ◽  
Aygul Z. Abilova ◽  
Sevda H. Zargarova ◽  
...  
Keyword(s):  
Propylene Oxide ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Surfactants

Successful complete digestion of well lithified shale and extraction of microfossils from Devonian beds in western New York

Stratigraphy ◽  
2020 ◽  
pp. 205-212
Author(s):  
Kimberly C. Meehan ◽  
Cody Kowalski ◽  
Kimberly Bartlett ◽  
Isabelle Li ◽  
Paul Bembia
Keyword(s):  
New York ◽  
Quaternary Ammonium ◽  
Sedimentary Rock ◽  
Complete Analysis ◽  
Late Devonian ◽  
Thin Sections ◽  
Devonian Shale ◽  
Complete Digestion ◽  
Quaternary Ammonium Surfactants ◽  
Traditional Approaches

ABSTRACT: Researchers in paleontological and paleoecological sciences often need complete disaggregation of rock materials for certain lines of investigation. However, complete disaggregation of more lithified sedimentary rock is known to be problematic. A complete shale disaggregation method implementing quaternary ammonium surfactants,widely used in paleontological sciences for poorly lithified shale and mudstone, was successfully used on well lithified Devonian shale in the Appalachian Basin ofWestern New York. Over 50 Devonian gray and black shale samples were collected from multiple localities in western New York (Cashaqua, Rhinestreet, Skaneateles, Windom, and Ludlowville), coarsely crushed, and fully immersed in a quaternary ammonium surfactant until complete disaggregation was achieved (5–14 days); aliquots were run through a series of nested sieves. The sieved sediments contained hundreds of well-preserved microfossils released from the shale: ostracods, dacryoconarids, and previously unreported palymorphs, charophytes, agglutinated foraminifera, miospores, and other microspherules. These microfossils were easily found within disaggregated and sieved samples but were unrecognizable on the shale surface and destroyed in prior investigations of whole rock thin sections. In addition to more traditional approaches, inclusion of this complete rock disaggregation method may assist in a more complete analysis of material, increase our understandings of ancient basin systems and have important implications on our understanding of the paleoecology during the Late Devonian marine biotic crises.

Colorimetric detection of quaternary ammonium surfactants using citrate-stabilized gold nanoparticles (Au NPs)

2014 ◽  
Vol 6 (7) ◽  
pp. 2031-2033 ◽  
Author(s):  
Li-Qing Zheng ◽  
Xiao-Dong Yu ◽  
Jing-Juan Xu ◽  
Hong-Yuan Chen
Keyword(s):  
Gold Nanoparticles ◽  
Quaternary Ammonium ◽  
Low Cost ◽  
Colorimetric Detection ◽  
Hydrophobic Effect ◽  
Colorimetric Method ◽  
Au Nps ◽  
Quaternary Ammonium Surfactants

Based on the hydrophobic effect inducing the aggregation of Au NPs, a rapid and low-cost colorimetric method for detection of quaternary ammonium surfactants using citrate-stabilized AuNPs was developed.

High Temperature CO2-in-Water Foams Stabilized with Cationic Quaternary Ammonium Surfactants

2016 ◽  
Vol 61 (8) ◽  
pp. 2761-2770 ◽  
Author(s):  
Yunshen Chen ◽  
Amro S. Elhag ◽  
Andrew J. Worthen ◽  
Prathima P. Reddy ◽  
Anne Marie Ou ◽  
...  
Keyword(s):  
High Temperature ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Surfactants
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