scholarly journals Interactions between Water-soluble Dye and Cationic Surfactant and Effects of Added Alcohol

2000 ◽  
Vol 49 (3) ◽  
pp. 245-253,277 ◽  
Author(s):  
Yoko YAMAGUCHI ◽  
Hidemi TAOKA ◽  
Hironobu KUNIEDA
Keyword(s):  
Cationic Surfactant ◽  
Water Soluble

Novel Water-Soluble Cyclodextrin-Based Conjugated Polymer for Selective Host–Guest Interactions of Cationic Surfactant CTAB and Reverse FRET with Rhodamine B Tagged Adamantyl Guest

2016 ◽  
Vol 49 (15) ◽  
pp. 5587-5598 ◽  
Author(s):  
Atul Kumar Dwivedi ◽  
Ravinder Singh ◽  
Ashutosh Singh ◽  
Kung-Hwa Wei ◽  
Chu-Ya Wu ◽  
...  
Keyword(s):  
Cationic Surfactant ◽  
Rhodamine B ◽  
Conjugated Polymer ◽  
Water Soluble

Complex Formation between Water-Soluble Porphyrin and Cationic Surfactant below the Critical Micelle Concentration

1997 ◽  
Vol 26 (8) ◽  
pp. 763-764 ◽  
Author(s):  
Teruo Hinoue ◽  
Junji Kobayashi ◽  
Toru Ozeki ◽  
Hitoshi Watarai
Keyword(s):  
Complex Formation ◽  
Critical Micelle Concentration ◽  
Cationic Surfactant ◽  
Water Soluble ◽  
Water Soluble Porphyrin

scholarly journals Spectrophotometric Study of Ternary Complex Forming Systems of Some Lanthanide Metal Ions with Eriochrome Cyanine R in Presence of Cetylpyridinium Bromide for Microdetermination

2011 ◽  
Vol 8 (3) ◽  
pp. 1264-1274 ◽  
Author(s):  
A. S. Dhepe ◽  
A. B. Zade
Keyword(s):  
Metal Ions ◽  
Cationic Surfactant ◽  
Molar Absorptivity ◽  
Ternary Complexes ◽  
Water Soluble ◽  
Stoichiometric Ratio ◽  
Cetylpyridinium Bromide ◽  
Lanthanide Metal ◽  
Colored Complexes

Study of coordination compounds of lanthanide elements has received a great attention due to growing applications in science and technology. Number of chromogenic reagents form water soluble colored complexes with lanthanides. Eriochrome cyanine R (ECR) a member of triphenylmethane type of dye has been reported to form green colored complexes with lanthanides and has been used for microdetermination of these metal ions. Addition of cationic surfactant, Cetylpyridinium bromide (CPB), a cationic surfactant sensitizes the color reactions of Gd(III), Tb(III), Dy(III), Ho(III) and Lu(III) with ECR. Formation of water soluble, highly colored ternary complexes with a considerable bathochromic shift of about 50 nm in presence of surfactant has been observed. Optimum reaction conditions and other analytical parameters were also evaluated. Stoichiometric ratio 1:3:3 of Ln: ECR: CPB are responsible for the observed rise in molar absorptivity and sensitivity. Beer’s law was obeyed between 0.50 to 13.00 ppm. Effective photometric range and molar absorptivity of these ternary complexes have been calculated. Effect of some common interfering ions on determination of these lanthanide metal ions was studied. A simple, rapid and highly sensitive spectrophotometeric method has been proposed for the determination of metal ions understudy.

scholarly journals Spectrophotometric Microdetermination of Thorium(IV) and Uranium(VI) with Chrome Azurol-S in Presence of Cationic Surfactant

2011 ◽  
Vol 8 (3) ◽  
pp. 1132-1141 ◽  
Author(s):  
A. B. Upase ◽  
A. B. Zade ◽  
P. P. Kalbende
Keyword(s):  
Metal Ions ◽  
Cationic Surfactant ◽  
Bathochromic Shift ◽  
Stoichiometric Composition ◽  
Formation Constants ◽  
Ternary Complexes ◽  
Water Soluble ◽  
Molar Ratio ◽  
Chrome Azurol S ◽  
Binary And Ternary Complexes

Cationic surfactant, cetyldimethylethylammonium bromide (CDMEAB), sensitize the color reactions of Th(IV) and U(VI) with chrome azurol-S(CRAS). Formation of water soluble deeply colored ternary complexes of metal ions show large bathochromic shift. Same stoichiometric composition of ternary complexes with 1:2:4 molar ratio (M-CRAS-CDMEAB) have been observed for both the metal ions and are responsible for enhancement in molar absorptivities and sensitivities at shifted wavelength. The ternary complexes of thorium(IV) and uranium(VI) exhibit absorption maxima at 640 and 620 nm with molar absorptivities 85500 and 69600 L.mol-1.cm-2respectively. Beer’s law were obeyed in concentration range 0.12-0.185 ppm for Th(IV) and 0.13-0.162 ppm for U(VI) in presence of CDMEAB. Conditional formation constants and various analytical parameters have been evaluated and compared the results of binary and ternary complexes. Enhancement in the molar absorptivities in presence of CDMEAB clearly indicated the usefulness of these colored reactions for microdetermination.

Selective precipitation of plasmid with a water-soluble cationic surfactant

2009 ◽  
Vol 20 (3) ◽  
pp. 151-155 ◽  
Author(s):  
Nese Ataci ◽  
Isabell Correia ◽  
Inci Arisan ◽  
João Carlos Marcos
Keyword(s):  
Cationic Surfactant ◽  
Water Soluble ◽  
Selective Precipitation

scholarly journals Facile control of surfactant lamellar phase transition and adsorption behavior

RSC Advances ◽  
2020 ◽  
Vol 10 (31) ◽  
pp. 18025-18034
Author(s):  
Rui A. Gonçalves ◽  
Polina Naidjonoka ◽  
Tommy Nylander ◽  
Maria G. Miguel ◽  
Björn Lindman ◽  
...  
Keyword(s):  
Phase Transition ◽  
Transition Temperature ◽  
Phase Behavior ◽  
Phase Transition Temperature ◽  
Cationic Surfactant ◽  
Liquid Crystalline ◽  
Water Soluble ◽  
Lamellar Phase ◽  
Adsorption Behavior ◽  
Small Water

The presence of small water-soluble additives makes it possible to tune the surfactant gel-to-liquid crystalline (Lβ–Lα) phase transition temperature (Tm) for a bilayer-forming cationic surfactant system and its phase behavior on dilution.

A Resorcinol-Formaldehyde Resin as an Embedding Material for Electron Microscopy of Membranes

1969 ◽  
Vol 27 ◽  
pp. 328-329 ◽  
Author(s):  
J. G. Robertson ◽  
D. F. Parsons
Keyword(s):  
Electron Microscopy ◽  
Osmium Tetroxide ◽  
Neutral Lipids ◽  
Lipid Extraction ◽  
Water Soluble ◽  
Formaldehyde Resin ◽  
Electron Microscope Autoradiography ◽  
Resorcinol Formaldehyde ◽  
Major Disadvantage ◽  
Cell Organization

The extraction of lipids from tissues during fixation and embedding for electron microscopy is widely recognized as a source of possible artifact, especially at the membrane level of cell organization. Lipid extraction is also a major disadvantage in electron microscope autoradiography of radioactive lipids, as in studies of the uptake of radioactive fatty acids by intestinal slices. Retention of lipids by fixation with osmium tetroxide is generally limited to glycolipids, phospholipids and highly unsaturated neutral lipids. Saturated neutral lipids and sterols tend to be easily extracted by organic dehydrating reagents prior to embedding. Retention of the more saturated lipids in embedded tissue might be achieved by developing new cross-linking reagents, by the use of highly water soluble embedding materials or by working at very low temperatures.

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