The effect of inorganic salts on the viscosity behavior of sodium dodecyl benzenesulfonate solution with high concentration

1993 ◽  
Vol 70 (1) ◽  
pp. 15-21 ◽  
Author(s):  
Jinghe Wang
Keyword(s):  
Sodium Dodecyl ◽  
Inorganic Salts ◽  
High Concentration ◽  
Viscosity Behavior ◽  
Sodium Dodecyl Benzenesulfonate

Interaction of Dendrimer-Based Polymer with Sodium Dodecyl Benzenesulfonate: Characterization and Effect on Properties of Composites

2016 ◽  
Vol 30 (11) ◽  
pp. 9362-9371 ◽  
Author(s):  
Nanjun Lai ◽  
Yan Zhang ◽  
Qing Zhou ◽  
Zhongbin Ye ◽  
Chun Wei ◽  
...  
Keyword(s):  
Sodium Dodecyl ◽  
Sodium Dodecyl Benzenesulfonate ◽  
Properties Of Composites

scholarly journals Dispersions of Metal Oxides in the Presence of Anionic Surfactants

2018 ◽  
Vol 3 (1) ◽  
pp. 3 ◽  
Author(s):  
Leszek Ruchomski ◽  
Edward Mączka ◽  
Marek Kosmulski
Keyword(s):  
Metal Oxides ◽  
Surfactant Concentration ◽  
Critical Concentration ◽  
Supporting Electrolyte ◽  
Sodium Dodecyl ◽  
Sodium Dodecylsulfate ◽  
Solubility Limit ◽  
Ionic Surfactants ◽  
Liquid Ratio ◽  
High Concentration

We studied the behavior of dilute dispersions of nanoparticles of hematite, alumina, and titania in the presence of various concentrations of very pure sodium dodecyl-, tetradecyl-, and hexadecylsulfate. The concentrations studied were up to critical micelle concentration (CMC) for sodium dodecylsulfate, and up to the solubility limit in case of sodium tetradecyl- and hexadecylsulfate. The dispersions were adjusted to different pH (3–11), and 10−3 M NaCl was used as the supporting electrolyte. The solid-to-liquid ratio was strictly controlled in all dispersions, and the behavior of fresh dispersions was compared with dispersions aged for up to eight days. The presence of very low concentrations of ionic surfactants had rather insignificant effects on the ζ potentials of the particles. At sufficient concentrations of ionic surfactants the isoelectric point (IEP) of metal oxides shifted to low pH, and the long-chain surfactants were more efficient in shifting the IEP than their shorter-chain analogues. Once the surfactant concentration reached a critical value, the ζ potentials of the particles reached a pH-independent negative value, which did not change on further increase in the surfactant concentration and/or aging of the dispersion. This critical concentration increases with the solid-to-liquid ratio, and it is rather consistent (for certain oxides and certain surfactants) when it is expressed as the amount of surfactant per unit of surface area. Surprisingly, the surfactant-stabilized dispersions always showed a substantial degree of aggregation; that is, the particle size observed in dispersions by dynamic light scattering was higher than the size of particles observed in dry powders by electron microscopy. Apparently, in spite of relatively high ζ potentials (about 60 mV in absolute value), the surfactant-stabilized dispersions consist of aggregates rather than of primary particles, and in certain dispersions the high concentration of surfactant seems to induce aggregation rather than prevent it.

Evaluation of lipoproteins and apolipoproteins in serum of a Tangier patient by micro-scale two-dimensional electrophoresis.

1987 ◽  
Vol 33 (4) ◽  
pp. 468-472 ◽  
Author(s):  
T Manabe ◽  
S Visvikis ◽  
M F Dumon ◽  
M Clerc ◽  
G Siest
Keyword(s):  
Molecular Mass ◽  
Gel Electrophoresis ◽  
Sodium Dodecyl ◽  
Disease Patient ◽  
High Density Lipoproteins ◽  
Two Dimensional ◽  
High Concentration ◽  
Two Dimensional Electrophoresis ◽  
Micro Scale ◽  
Dimensional Electrophoresis

Abstract We examined lipoproteins and apolipoproteins in serum of a Tangier-disease patient. We used three different techniques of micro-scale two-dimensional electrophoresis: (a) no denaturants; (b) with sodium dodecyl sulfate (SDS) used only in the slab gel electrophoresis; (c) and with urea and a detergent used in isoelectric focusing and with SDS in slab gel electrophoresis. By technique a, an extremely low concentration of high-density lipoproteins (HDL) in the Tangier serum was seen, and lipoproteins that cannot form HDL complexes were detected as multiple spots in the acidic (pl 4 approximately 5) and relatively low apparent molecular mass (20,000 approximately 80,000) region. By technique b, Tangier low-molecular-mass lipoproteins were dissociated into their constituent apolipoproteins, and we observed a higher proportion of apoC-III, together with lower proportions of apoA-I and apoA-II, than in the normal HDL fraction. Technique c showed the total content of apolipoproteins in the whole Tangier serum, as several workers have reported. The presence of low-molecular-mass lipoproteins and a high concentration of apoC-III in this lipoprotein fraction characterized the Tangier serum.

scholarly journals A fast-acting elastase inhibitor in human monocytes.

1985 ◽  
Vol 162 (6) ◽  
pp. 2142-2155 ◽  
Author(s):  
E Remold-O'Donnell
Keyword(s):  
Proteinase Inhibitor ◽  
Sodium Dodecyl ◽  
Human Monocyte ◽  
Sulfate Solution ◽  
Cell Protein ◽  
Human Monocytes ◽  
High Concentration ◽  
Elastase Inhibitor ◽  
Nucleophilic Cleavage ◽  
Fast Acting

A proteinase inhibitor active against neutrophil and pancreatic elastase was detected in extracts of cultured human monocytes and the human monocyte-like cell line U937. This component forms a covalent complex with the active site of elastase; the complex is stable in boiling sodium dodecyl sulfate solution, and is susceptible to nucleophilic cleavage. The activity of the elastase inhibitor is not detected in extracts of freshly isolated monocytes, but becomes detectable when the monocytes are allowed to mature in culture, with maximum levels occurring at 5-7 d. The monocyte inhibitor is fast-acting; its reaction with 125I-labeled elastase is complete in less than 1 min at 37 degrees C. Analysis by electrophoresis and studies using a heteroantiserum to alpha 1-proteinase inhibitor demonstrated that the elastase inhibitor of monocytes/U937 cells is not identical to alpha 1-proteinase inhibitor, the major elastase inhibitor of blood plasma. The extent of conversion of 125I-elastase to the 125I-elastase-inhibitor complex is proportional to the amount of U937 extract or cultured monocyte extract, indicating that this reaction can serve to quantify the elastase inhibitor. The elastase inhibitor is an abundant component in mature monocytes, with greater than or equal to 1.5 X 10(6) molecules/cell (greater than or equal to 12 micrograms per 10(8) cells, greater than 0.1% of total cell protein). Its mol wt is estimated at 50,000. Thus, the monocyte inhibitor should be classified as a putative regulator of neutrophil (and monocyte) elastase activity at inflammatory sites. This designation is based on the properties of the molecule, including its high concentration in maturing monocytes, its affinity for elastase, and its fast reaction with this enzyme.

Ushoi kangshu -A traditional bamboo shoot salad of the Meiteis of Manipur

2016 ◽  
Vol 35 (1) ◽  
Author(s):  
Yengkokpam Ranjana Devi ◽  
Amrit Chakma
Keyword(s):  
Preparation Method ◽  
Inorganic Salts ◽  
Bamboo Shoot ◽  
Cyanogenic Glycosides ◽  
High Concentration ◽  
Fermented Fish ◽  
Toxic Compound ◽  
Traditional Art ◽  
Bamboo Shoots ◽  
Health Studies

<italic>Ushoi kangshu</italic> is a fiery traditional seasonal delicacy of the <italic>Meiteis</italic> of Manipur, India prepared from fresh bamboo shoot. The main ingredients being fermented fish, chillies and peas. The preparation method is a traditional art which is handed over from generation to generation. Bamboo shoots are low in calories, high in dietary fiber and rich in various nutrients like protein, carbohydrates, amino acids, minerals, fat, sugar and inorganic salts, however, bamboo shoots are known to contain plant toxins (cyanogenic glycosides) which are harmful to human health. Studies on the cyanogenic content shows that the toxin is present in high concentration (600mg/kg) in the fresh bamboo shoot however, the concentration of the toxic compound is decreased step wise (400mg/kg to 160mg/kg) during the preparation of <italic>ushoi kangshu</italic> and is completely removed at the final step of preparation. More over it was observed that this ethnic bamboo shoot salad is highly nutritious due to its garnishing with locally available herbs which has medicinal and therapeutic values.

scholarly journals The use of sodium perchlorate in deproteinization during the preparation of nucleic acids

1973 ◽  
Vol 135 (3) ◽  
pp. 559-561 ◽  
Author(s):  
John Wilcockson
Keyword(s):  
Nucleic Acids ◽  
Sodium Dodecyl Sulphate ◽  
Sodium Dodecyl ◽  
Sodium Perchlorate ◽  
High Concentration ◽  
High Concentrations

Sodium perchlorate in high concentrations will remove from solution the detergent sodium dodecyl sulphate and protein complexed with it. This and the failure of proteins to be precipitated by ethanol from solutions containing a high concentration of sodium perchlorate can be utilized as efficient, rapid and simple deproteinization procedures during the preparation of nucleic acids.

scholarly journals Humidity Sensing Behavior of Endohedral Li-Doped and Undoped SWCNT/SDBS Composite Films

Sensors ◽  
2019 ◽  
Vol 19 (1) ◽  
pp. 171 ◽  
Author(s):  
Christian Müller ◽  
Ammar Al-Hamry ◽  
Olfa Kanoun ◽  
Mahfujur Rahaman ◽  
Dietrich R. T. Zahn ◽  
...  
Keyword(s):  
Gas Sensing ◽  
Sodium Dodecyl ◽  
Composite Films ◽  
Electrical Characterization ◽  
High Concentration ◽  
Humidity Sensing ◽  
Design And Optimization ◽  
Li Doping ◽  
Humidity Response ◽  
Water Detection

We have investigated single-walled carbon nanotube (SWCNT) networks wrapped with the cationic surfactant sodium dodecyl-benzenesulfonate (SBDS) as promising candidates for water detection. This is the first time that the humidity behavior of endohedral Li-doped (Li@) and undoped SWCNTs/SDBS has been shown. We identified a strong and almost monotonic decrease in resistance as humidity increased from 11 to 97%. Sensitivities varied between −3 and 65% in the entire humidity range. Electrical characterization, Raman spectroscopy, and high-resolution transmission electron microscopy (HRTEM) analysis revealed that a combination of the electron donor behavior of the water molecules with Poole-Frenkel conduction accounted for the resistive humidity response in the Li@SWCNT/SDBS and undoped SWCNT/SDBS networks. We found that Li@SWCNTs boosted the semiconducting character in mixtures of metallic/semiconducting SWCNT beams. Moreover, electrical characterization of the sensor suggested that endohedral Li doping produced SWCNT beams with high concentration of semiconducting tubes. We also investigated how frequency influenced film humidity sensing behavior and how this behavior of SWCNT/SDBS films depended on temperature from 20 to 80 ° C. The present results will certainly aid design and optimization of SWCNT films with different dopants for humidity or gas sensing in general.

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