0013] This invention relates to creating a new class of surface-active agents (amphiphilic molecules) from naturally occurring polysaccharides. The starting materials used in this invention are either partially water-soluble or completely insoluble polysaccharides. They were hydrophilically modified to yield effective wetting agents or emulsifiers. See examples 1-7 for methods of hydrophilically modifying water insoluble polysaccharide. See example 1 and Table 1 for surface tension results. In one of the embodiments, the hydrophilic modification involves covalent functionalization of the polygalacturonic acid using naturally occurring or synthetic molecules that may include but are not restricted to amino acids, peptides, and lipids containing sulfonate groups, and/or polyethylene glycol (PEG) or polypropylene glycol (PPG) homopolymers and copolymers. In another embodiment the said modification process can be carried out with conventional chemical methods using heat supplied using conventional ...
The effects of Pluronic F68, a nonionic surface-active agent, on blood viscosity and platelet adhesiveness during extracorporeal circulation were investigated. Blood viscosity was significantly decreased. Platelet adhesiveness decreased markedly in six patients within ten minutes after intravenous injection. Pluronic F68 has many properties and actions which make it a useful additive to perfusion systems. Its potential in the treatment of diseases in which high viscosity or increased platelet adhesiveness are present deserves investigation.. ...
Contents of the 15 Chapter for This Anionic Surfactants Market Study:-. Chapter 1: to describe Global Anionic Surfactants Market Introduction, product scope, market overview, market opportunities, market risk, market driving force;. Chapter 2: to analyze the top manufacturers of Global Anionic Surfactants Market, with sales, revenue, and price of Global Anionic Surfactants Market, in 2016 and 2017;. Chapter 3: to display the competitive situation among the top manufacturers, with sales, revenue and market share in 2016 and 2017;. Chapter 4: to show the Global Anionic Surfactants market by regions, with sales, revenue and market share of Global Anionic Surfactants Market, for each region, from 2012 to 2017;. Chapter 5, 6, 7, 8 and 9: to analyze the key regions, with sales, revenue and market share by key countries in these regions;. Chapter 10 and 11: to show the market by type and application, with sales market share and growth rate by type, application, Methodology, Analyst Introduction, Data ...
In the present work, the cloud point extraction (CPE) of three organic pollutants (phenol,benzyl alcohol and 1-phenylethanol) with aqueous solutions of biodegradable alkoxylated nonionic surfactants (TERGITOL 15-S-7 and SIMULSOL NW342), is investigated. First, the partial phase diagrams of the water-surfactant binary systems are established. Then, the effects of organic pollutants and sodium chloride on the cloud point (Tc) are determined. Extraction efficiency is evaluated by the following responses: percentage of solute extracted, E (%), residual concentrations of solute and surfactant in dilute phase (Xs,w, and Xt,w, respectively) and volume fraction of coacervate at equilibrium (ϕc). Three-dimensional empirical correlations are used for fitting the experimental results. The comparison between experimental and calculated values allows model parameter identification. Based on these data, CPE was implemented in a continuous mixer-settler device. The feasibility of a multi-stage crossflow ...
The invention provides compositions intended for the treatment of fibrous materials. These compositions contain at least one cationic polymer, at least one anionic polymer, at least one alkali metal salt and at least one non-ionic surface-active agent or surface-active agent which contains one or more carboxyl or carboxylate groups in addition to non-ionic groups.
Vanity - Sebum-Balancing Soap - Bema Boutique eCommerce, This detergent is especially suitable for greasy and combination skins. It dissolves and eliminates the exceeding skin sebum, horny scales, dust traces and impurities without attacking the skins natural defences. It has a purifying and cleansing action. It does not contain surface-active agents. Its cleansing action does not impoverish the skin hydrolipidic layer not to stimulate the sebaceous secretion. This detergent is especially suitable for greasy and combination skins. It dissolves and eliminates the exceeding skin sebum, horny scales, dust traces and impurities without attacking the skins natural defences. It has a purifying and cleansing action. It does not contain surface-active agents. Its cleansing action does not impoverish the skin hydrolipidic layer not to stimulate the sebaceous secretion.
Font - Ribera, Laia ; Kogevinas, Manolis ; Zock, Jan - Paul ; Gomez, Federico P. ; Barreiro, Esther ; Nieuwenhuijsen, Mark J. ; Fernandez, Pilar ; Lourencetti, Carolina ; Perez - Olabarria, Maitane ; Bustamante, Mariona ; Marcos, Ricard ; Grimalt, Joan O. ; Villanueva, Cristina M ...
Nonionic surfactants are surface active agents which do not dissociate into ions in aqueous solutions, unlike anionic surfactants which have a negative charge and cationic surfactants which have a positive charge in aqueous solution. Nonionic surfactants are more widely used as detergents than ionic surfactants because anionic surfactants are insoluble in many hard water and cationic surfactants are considered to be poor cleaners. In addition to detergency, nonionic surfactants show excellent solvency, low foam properties and chemical stability. It is thought that nonionic surfactants are mild on the skin even at high loadings and long-term exposure. The hydrophilic group of nonionic surfactants is a polymerized alkene oxide (water soluble polyether with 10 to 100 units length typically). They are prepared by polymerization of ethylene oxide, propylene oxide, and butylene oxide in the same molecule. Depending on the ratio and order of oxide addition, together with the number of carbon atoms ...
Studies on a model ink suspension have shown that the effect of non-ionic dispersion agents on ink agglomeration using fatty acid chemistry as collector was highly temperature-dependent. The non-ionic surfactant reduced the agglomeration efficiency at low temperatures (below the cloud point of the surfactant) but this negative effect was reduced at increasing temperatures. At temperatures above the cloud point the non-ionic surfactant improved the agglomeration. The non-ionic surfactant adsorbs to both the ink and precipitated soap particles, which at low temperatures resulted in an increased colloidal stability of the particles but at higher temperatures led to a destabilisation of the particles due to the increased hydrophobicity of the surfactant. The surfactants clearly affected the precipitation of fatty acid anions to calcium soaps and at very high surfactant concentrations the formation of calcium soap particles was drastically reduced. The most favourable conditions seemed to be ...
The cloud points (CP) of 1 g/dl solutions of polyethylene oxide-polypropylene oxide (PEO-PPO) based triblock copolymers (Pluronics® P84, L64, L44 and Reverse Pluronics® 10R5, 25R4, 17R4) were measured as a function of their molecular weight and added ionic surfactant. For identical PEO/PPO ratios, copolymers with lower molecular weight show a larger increase in the cloud point in the presence of surfactants than polymers with higher molecular weight. The opposite trend has been observed for reverse Pluronics. The cloud points of polymers with different PEO/PPO ratios have also been reported. An increase in the size of the middle PEO block in reverse Pluronics has a more significant effect on cloud points than molecular weight increment. Ionic surfactants produced marked increases in the cloud points of copolymer solutions. The effect was much larger for surfactants with higher hydrophobicity. Cationic surfactants with different chain lengths were used to examine the surfactant-polymer ...
Emulsions are metastable systems typically formed in the presence of surfactant molecules, amphiphilic polymers, or solid particles, as a mixture of two mutually immiscible liquids, one of which is dispersed as very small droplets in the other. These dispersions are unwanted occurrences in some areas, like those formed during crude oil production, but are also put into many other useful applications in the oil and gas industry, food industry, and construction industry, among others. These emulsions form when two immiscible liquids come together in the presence of an emulsifying agent and sufficient agitation strong enough to disperse one of the liquids in the other. Thermodynamically, these emulsions are unstable and thus would separate into their individual phases when left alone. To be stabilized, surface-active agents (surfactants) or solids (that act in so many ways like surfactants) ought to be used. Like many commercially available products, several pharmaceutical products are usually supplied in
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A Niosome is a non-ionic surfactant-based Vesicle (biology and chemistry). Niosomes are formed mostly by non-ionic surfactant and cholesterol incorporation as an excipient. Other excipients can also be used. Niosomes have more penetrating capability than the previous preparations of emulsions. They are structurally similar to liposomes in having a bilayer, however, the materials used to prepare niosomes make them more stable. Niosomes are lamellar structures that are microscopic in size. They constitute of non-ionic surfactant of the alkyl or dialkyl polyglycerol ether class and cholesterol with subsequent hydration in aqueous media. The surfactant molecules tend to orient themselves in such a way that the hydrophilic ends of the non-ionic surfactant point outwards, while the hydrophobic ends face each other to form the bilayer. The figure in this article on Niosomes gives a better idea of the lamellar orientation of the surfactant molecules. Niosomes are osmotically active, chemically stable ...
The susceptibility of ethoxylated non-ionic surfactants to oxidation on exposure to air was investigated. Surfactants have a complex chemical composition and are widely used in a variety of applications for to their amphiphilic properties. Ethoxylated non-ionic surfactants are regarded by the producers to be stable at normal handling. However, ethoxylated surfactants are polyethers and as such susceptible to oxidation on exposure to air, which is theoretically discussed in literature. Hand eczema is a common occupational disease of which mom than half of the cases is considered to be caused by work with surfactants and water. Surfactants are known to cause skin irritation, but cases of allergic contact dermatitis have also been reported.. Some ethoxylated surfactants were handled at room temperature in a manner that imitated ordinary handling at work. All samples autoxidized and the structures of some of the components formed were identified with liquid chromatography (HPLC) and gas ...
The self-assembly of complex molecules containing water-attracting (hydrophilic) and water-repelling (hydrophobic) segments in water is important across many scientific disciplines. Surfactants are surface-active agents widely used in the chemical industry to control the interface between liquids or a solid and a liquid. Surfactants aggregate to give either spherical or cylindrical molecular structures with collapsed hydrophobic cores and hydrophilic outer surfaces when exposed to water. Similarly, proteins fold in three-dimensional structures with hydrophobic cores in the interior and hydrophilic groups in the exterior. In contrast, the molecular peptoid structures, a nature-inspired synthetic material, synthesized in this research at Lawrence Berkeley National Laboratory consist of hollow rings stacked to produce a tube. The key to verifying the formation of nanotubes is cryo-electron microscopy which imaged 50 of the nanotubes showing the diameter of each tube is relatively uniform along its ...
Abstract: Understanding the structure of polymer/surfactant mixtures at the air-water interface is of fundamental importance and also of relevance to a variety of practical applications. Here, the complexation between a neutral tardigrade comb co-polymer (consisting of a hydrophilic polyethylene glycol backbone with hydrophobic polyvinyl acetate grafts, PEG-g-PVAc) with an anionic surfactant (sodium dodecyl sulfate, SDS) at the air-water interface has been studied. Contrast-matched neutron reflectivity (NR) complemented by surface tension measurements allowed elucidation of the interfacial composition and structure of these mixed systems, as well as providing physical insights into the polymer/surfactant interactions at the air-water interface. For both polymer concentrations studied, below and above its critical aggregation concentration, cac, (0.2 cac and 2 cac, corresponding to 0.0002 wt% or 0.013 mM and 0.002 wt% or 0.13 mM respectively), we observed a synergistic cooperative behaviour at ...
NEW YORK, Feb. 2, 2011 /PRNewswire/ -- Reportlinker.com announces that a new market research report is available in its catalogue: Global Surface Active Agents...
A liquid or cream detergent composition contains (a) a finely divided water-insoluble abrasive suspended in a medium consisting essentially of (b) water, (c) an anionic detergent and (d) a nonionic surface-active agent. (a) may be tripoli, carborundum, felspar, pumice or kieselguhr but is usually silica, and is such that substantially all passes a sieve with 104m apertures and at least 80% passes one with 53m apertures; (a) generally comprises 5-50%, preferably 20-45%, by weight of the total composition. (c), which may comprise 3-15%, preferably 6-12%, of the liquid medium (i.e. the total composition exclusive of (a)) may be soap, an alkyl sulphate, an alkylaryl sulphonate or an acylaminoalkane sulphonate, but is most suitably a mixture of 1-7% of potassium groundnut oil soap and 1-9% sodium dodecyl benzene sulphonate. (d) may be an ethylene oxide adduct with an alkylphenol, fatty acid or fatty alcohol, or an alkanolamide, glycerolamide, or tris-(hydroxymethyl) methylamide in an amount of 1-12%
Cloud point is an important property to consider when evaluating surfactants for your formulation.. Cloud point is defined as the temperature above which a surfactant rich phase separates from an aqueous solution. This separation occurs when a nonionic surfactant, for instance, becomes insoluble due to increased heat, resulting in a cloudy or hazy dispersion in the solution. As heat and instability increases, the solution may undergo total phase separation.. It is generally understood that nonionic surfactants will perform most effectively when used at temperatures at or near their cloud point.. With this in mind, it is possible to manipulate the cloud point of a solution through the presence of other materials. More specifically, certain components can depress or increase the solutions cloud point. For example, the addition of a coupler or hydrotrope can increase the cloud point of a solution, whereas builders or other salts (electrolytes) will depress the cloud point temperature. In fact, ...
Manufacturer of Detergent Raw Material & Detergent Raw ...- detergent powder export from india ,Incepted in the year 1992, our company Blue Chem India is one of the pioneer Manufacturers and Exporters of Detergent Enzymes, Detergent Whitening And Softening Agents, Detergent Fragrance, Pigment Powders, and many more.HSN Code for Detergent Powder in India - Import Export DataHSN Code Product Description Import Data Export Data; 3402: Organic surface-active agents (other than soap), surface- active preparations, washing preparations (including auxiliary washing preparations) and cleaning preparations, whether or not containing soap, other than those of heading ...
RDCL Co., Ltd Myanmar - Top reliable distributor of ...- liby detergent address in myanmar ,RDCL offers a one stop comprehensive package of services that provides entire value chain for any prospective and existing partners from sourcing to after sale services for health and consumer products inclusive of cold chain . RDCL provides our partners with expertise , on the ground logistics and tailor made services based on on a comprehensive network and including the following services.Detergent GP , Food Industry , Amity InternationalDetergent GP. A highly concentrated aqueous blend based on alkaline salts, surface-active agents and sequestrants. It is specially formulated to give long lasting foam and to provide outstanding cleanliness of articles with economy of use in both hard and soft water environments ...
Stable microbicidal disinfectant compositions comprising a complex of a halogen, a nonionic surface-active agent, and an -onium salt of an alkyl amine characterized by a negative reaction to standard tests for free halogen, no loss of halogen when boiled in an aqueous solution, and having microbicidal activity.
In: XXII International Conference on Raman Spectroscopy. American Institute of Physics, Melville, USA, pp. 839-840. ISBN 9780735408180 ISSN 0094-243X (doi:10.1063/1.3482842) Vine, G.J., Chowdhry, B.Z. and Mitchell, J.C. (2005) Antimicrobial properties of surface-active agents by flow calorimetry. Journal of Pharmacy and Pharmacology, 57 (S1). S107-S107. ISSN 0022-3573 (Print), 2042-7158 (Online) (doi:10.1211/002235705778248406) Seidel, J., Pinkrah, V.T., Mitchell, J.C., Chowdhry, B.Z. and Snowden, M.J. (2004) Isothermal titration calorimetric studies of the acid-base properties of poly (N-isopropylacrylamide-co-4-vinylpyridine) cationic polyelectrolyte colloidal microgels. Thermochimica Acta, 414 (1). pp. 47-52. ISSN 0040-6031 (doi:10.1016/j.tca.2003.11.012) Pinkrah, V.T., Snowden, M.J., Mitchell, J.C., Seidel, J., Chowdhry, B.Z. and Fern, G.R. (2003) Physicochemical properties of poly(N-isopropylacrylamide-co-4-vinylpyridine) cationic polyelectrolyte colloidal microgels. Langmuir, 19 (3). pp. ...
AIR COOLER CLEANER. Cleaner & Corrosion Inhibitor. Code : 56001 (25 ltr Drum) A liquid cleaner containing solvents and surface-active agents for on-line and off-line cleaning of charge air coolers. It has been developed for safe, fast and economical in-service cleaning of the air handling systems of turbo charged diesel engines. By using ACC, airborne contaminants that have been carried into and deposited on scavenger air trunks, air coolers and inlet valves are removed. ...
Contents of the 15 Chapter for This Biosurfactants Market Study:-. Chapter 1: to describe Global Biosurfactants Market Introduction, product scope, market overview, market opportunities, market risk, market driving force;. Chapter 2: to analyze the top manufacturers of Global Biosurfactants Market, with sales, revenue, and price of Global Biosurfactants Market, in 2016 and 2017;. Chapter 3: to display the competitive situation among the top manufacturers, with sales, revenue and market share in 2016 and 2017;. Chapter 4: to show the Global Biosurfactants market by regions, with sales, revenue and market share of Global Biosurfactants Market, for each region, from 2012 to 2017;. Chapter 5, 6, 7, 8 and 9: to analyze the key regions, with sales, revenue and market share by key countries in these regions;. Chapter 10 and 11: to show the market by type and application, with sales market share and growth rate by type, application, Methodology, Analyst Introduction, Data Source from 2012 to ...
In present investigation, B. subtilis and B. cereus was isolated and Identified from the petroleum contaminated site soil and identified by grams staining, motility and biochemical tests. After the isolation and identification, biosurfactant production from bacterial organisms was screened using mineral salt medium, by oil spreading, drop collapse and hemolysis test. From the blood agar plates, the biosurfactant producing bacterial culture were obtained and maintained as stock cultures. Organisms were inoculated into the mineral salt broth with petroleum oil, diesel oil, kerosene oil and crude oil as a carbon source for biosurfactant production. Biosurfactant was extracted by acid precipitation method. Biosurfactants production was optimized by using different pH, temperature, carbon and nitrogen sources. Emulsification activity of biosurfactant was analyzed. The extracted biosurfactant was characterized by using Thin Layer Chromatography (TLC). B.subtilis was able to produce the biosurfactant ...
The invention provides a liquid laundry detergent composition comprising: a) from 8 to 15% (by weight based on the total weight of the composition) of anionic surfactants selected from linear alkylbenzene sulfonates and mixtures thereof with alkyl ether sulfate; b) from 1 to 5% (by weight based on the total weight of the composition) of nonionic surfactants selected from C8 to C18 primary or secondary linear or branched alcohol ethoxylates with an average of from 2 to 40 moles of ethylene oxide per mole of alcohol; c) from 0.5 to 15% (by weight based on the total weight of the composition) of polymeric cleaning boosters selected from antiredeposition polymers, soil release polymers and mixtures thereof; in which the total amount of anionic surfactants (a) + nonionic surfactants (b) ranges from 9 to 20% (by weight based on the total weight of the composition); and in which the weight ratio of anionic surfactants (a) to nonionic surfactants (b) ranges from 3:1 to 12:1.
Most anionic and non-ionic surfactants are nontoxic, having LD50 comparable to sodium chloride. The toxicity of quaternary ammonium compounds, which are antibacterial and antifungal, varies. Dialkyldimethylammonium chlorides (DDAC, DSDMAC) used as fabric softeners have low LD50 (5 g/kg) and are essentially non-toxic, while the disinfectant alkylbenzyldimethylammonium chloride has an LD50 of 0.35 g/kg. Prolonged exposure to surfactants can irritate and damage the skin because surfactants disrupt the lipid membrane that protects skin and other cells. Skin irritancy generally increases in the series non-ionic, amphoteric, anionic, cationic surfactants.[3] Surfactants are routinely deposited in numerous ways on land and into water systems, whether as part of an intended process or as industrial and household waste.[5][6][7] Anionic surfactants can be found in soils as the result of sludge application, wastewater irrigation, and remediation processes. Relatively high concentrations of surfactants ...
TY - CONF. T1 - Biosurfactant production by lactic acid bacteria. AU - Prior, C.. AU - Speelmans, G.. AU - Weusthuis, R.A.. PY - 1998. Y1 - 1998. M3 - Poster. Y2 - 12 March 1998 through 13 March 1998. ER - ...
Granular detergent compositions containing an anionic surfactant, an ethoxylated surfactant solubility aid and a water-soluble neutral or alkaline salt are disclosed. The compositions are prepared by forming an intimate mixture of the anionic and ethoxylated surfactants and then agglomerating the mixture with the neutral or alkaline salt.
SAAPedia: Professional website of surfactants. Include: Anionic surfactants, Cationic surfactants, Non-ionic surfactants, Zwitterionic surfactants, Polymer Surfactants, Fluoro surfactants, Silicone surfactants, Biosurfactants, Natural surfactants, Special surfactants, Standard, Documents, etc.
Color bleed (the invasion of one color into another on the surface of the print medium) using ink-jet inks is alleviated by employing zwitterionic surfactants (ph-sensitive or pH-insensitive) or ionic or non-ionic amphiphiles. The inks of the invention comprise a vehicle and a cationic dye. The vehicle typically comprises a low viscosity, high boiling point solvent, one or two amphiphiles at concentrations above their critical micelle concentration (cmc), while the dye typically comprises any of the dyes commonly employed in ink-jet printing. The amount of surfactants/amphiphile is described in terms of its critical micelle concentration (cmc), which is a unique value for each amphiphile. Above the cmc, micelles form, which attract the dye molecule and thus control the color bleed. Below the cmc, there is no micelle formation, and thus no control of the color bleed.
The most important daily skin care is to clean our face.A good cleansing will make you fall in love with skin.. How to choose a good cleanser?. When purchase cleanser, ignore the brand factor, the main thing is to see the surface active agent. As for the smell (aroma), preservatives, more important is to look at personal preferences. Different surfactants builds cleansing products, will form a different sense of washing (at the same time the sense of washing will be affected by moisturizing ingredients, thickening ingredients and other effects) and cleanliness. Few cleansers are completely constructed with a single surfactant. Usually with several different surfactants to match up.. Soap-based cleanser. Soap-based cleanser is an anionic surfactant; soap-based cleanser is usually used fatty acids plus alkali ingredients to build cleanser products. Generally speaking, different fatty acids are slightly different after the formation of soap base. For example, the longer the carbon chain, the finer ...
The viscosity of anionic surfactant slurries is increased by admixing with such slurries an effective amount of a viscosity increasing additive selected from the group consisting of dialkyl ethers wherein the alkyl radicals of said ethers contain from 2 to 5 carbon atoms, alkoxyethoxyethanols wherein the alkyl radical contains from 2 to 6 carbon atoms, and tertiary amines wherein the alkyl radical contains from 2 to 4 carbon atoms.
Description: Compositions which contains a sulfur-containing anionic surfactant; e.g., sulfonates, sulfates, sulfosuccinates, isethionates, sarcosinates, taurates, etc ...
The effect of nonionic surfactants on the cationic conjugated polymer (CCP), poly{9,9-bis[6-(N,N-trimethylammonium)hexyl]fluorene-co 1,4-phenylene} iodide 1, has been investigated. It is shown that the CCP in various solvents exists in three phases: isolated polymer chains, polymer aggregate, and variable size clusters (partially dissolved polymer). It is shown that nonionic surfactants enhance the photoluminescence (PL) quantum yield of the CCP in water by breakup of polymer aggregates, which eliminates the nonemissive interchain quenching with aggregates and increases surface-to-volume ratio of the CCP. Furthermore, the surfactants reduce quenching by incorporation of the CCP into aggregates or binary micelles. Surfactant also reduces the polar interaction strength between CCP and water and enhances CCP quenching by the counterions (iodine) by ion pairing effect. The dynamics of the interactions are complex and reveal that the surfactant induces rapid increase in the PL which imply that the ...
1. U.v. difference spectra show that the anionic surfactant sodium n-dodecyl sulphate unfolds ribonuclease A at pH7.3 and 10.3, but that the cationic surfactant n-dodecyltrimethylammonium bromide does not affect the conformation of the enzyme. 2. Equilibrium-dialysis experiments show that sodium n-dodecyl sulphate binds to ribonuclease A, but no binding of n-dodecyltrimethylammonium bromide could be detected at pH7.3. 3. The enzymic activity of ribonuclease A is unaffected by n-dodecyltrimethylammonium bromide up to a concentration of 0.03m at 25°C. 4. Ultracentrifuge studies support the conclusion that n-dodecyltrimethylammonium bromide does not interact significantly with ribonuclease A. 5. The enthalpy change as measured by microcalorimetry on binding of sodium n-dodecyl sulphate to ribonuclease A is consistent with an exothermic enthalpy of binding occurring simultaneously with an endothermic enthalpy of chain unfolding.. ...
Surface active agents - Determination of cloud point of non-ionic surface active agents obtained by condensation of ethylene oxide
To investigate whether nitric oxide (NO) is involved in surfactant-induced systemic and pulmonary vasodilatation in newborn piglets with surfactant deficiency, 2-6-d-old piglets were subjected to repeated saline lung lavages. They were then randomly
Biosurfactants have recently been recognized as important biotechnological products in biomedical, cosmeceutical, and potential food applications owing to their specificity, low toxicity, and biodegradability. In recent years, increasing concern has been placed on the environmental impacts of chemical surfactants. Biosurfactants (BSs) produced by microorganisms such as yeast, fungi, and bacteria are thought to be efficient replacers of chemically synthetic surfactants, and BSs have been developed as suitable alternatives for antimicrobial and biomedical agents. This study aimed to develop of high throughput screening (HTS) method for large amounts of potential candidates. In HTS steps, we developed rapid and simple screening methods for BS-producing yeast to design processes for the production of BS. During the screening for BS-producing yeast, we isolated many BS-producing yeasts which were identified as Aureobasidium pullulans, from wild flowers. A. pullulans is ubiquitous yeast found in ...
Author: Schomaecker, R. et al.; Genre: Journal Article; Published in Print: 1994-04-07; Title: Effect of ionic surfactants on nonionic bilayers: bending elasticity of weakly charged membranes
Self-emulsifying oil/surfactant mixtures can be incorporated into pellets that have the advantages of the oral administration of both microemulsions and a multiple-unit dosage form. size of the reconstituted microemulsions was comparable to that in the wetting microemulsions. The less hydrophilic ELP with a double bond in the fatty acid showed weaker H-bonding and greater microemulsion reconstitution. Purified ELP gave greater reconstitution than the unpurified grade. Thus, the work demonstrates that the choice of type and quantity of the surfactant used in the formulation NVP-BHG712 of microemulsions made up of pellets has an important influence on their production and performance. in dogs as if they were the microemulsion liquid itself (2). It has also been found that the relative quantities of SES and water, as well as the fraction of oil and surfactant in the dry pellets affect the amount of liquid and SES that could be incorporated into MCC, the extrusion pressure, and the properties of the ...
Any type of surfactant has a hydrophilic-lipophilic balance number (HLB number) of different. There are several methods for determining the HLB number, with ohysical properties of surfactant (solubility cloud point and interfacial tension), CMC methods and by thermodynamics properties (Free energy Gibbs). This paper proposes to determined HLB numbers from interfelation methods. The result of study indicated that the CMC method described by Hair and Moulik espesially for nonionic surfactant. The application of exess Gibbs free energy and by implication activity coefficient provides the ability to predict the behavior of surfactants in multi component mixtures of different concentration. Determination of HLB number by solubility and cloud point parameter is spesific for anionic and nonionic surfactant but this methods not available for cationic surfactants. ...
TY - JOUR. T1 - Adsorption of ionic surfactants on variable-charge surfaces. 1. Charge effects and structure of the adsorbed layer.. AU - Böhmer, M.R.. AU - Koopal, L.K.. PY - 1992. Y1 - 1992. U2 - 10.1021/la00047a014. DO - 10.1021/la00047a014. M3 - Article. VL - 8. SP - 2649. EP - 2659. JO - Langmuir. JF - Langmuir. SN - 0743-7463. ER - ...
Biosurfactants compounds are produced by microorganisms. These isolates reduced surface tension both in aqueous solutions and hydrocarbon mixtures. The objective of this study was to isolate and identify the biosurfactant producing bacteria from petrochemical soil wastes. Among the 16 isolates, two strains (BPB7: Pseudomonas sp and BPB13: Serratia sp) were shown high salt tolerance and successful production of biosurfactant in a range of pH 6.5 to 7.5 and at room temperature. To confirm the ability of isolates in biosurfactant production, different screening methods including hemolysis, emulsification, penetration, oil spreading test BATH assay and salt aggregation assay were assessed. This study was suggested that these two bacteria having potential for microbial enhanced oil recovery and also possessing Anti microbial and Anti adhesive property. The rich amount of biosurfactant compound like, glycolipid was found in these two strains. (BPB7 and BPB13 ...
Amphiphilic dicationic surfactants, known as gemini surfactants, are currently studied for gene delivery purposes. The gemini surfactant molecule is composed of two hydrophilic
A. Lipid Order Parameter in the Presence of Amphiphilic Molecules The outer lipid membrane surface of eukaryotic cells is generally uncharged. Amphiphilic, water-soluble molecules such as local anesthetics, viral or antibiotic pep-tides, or peptide toxins therefore partition into the bilayer […]
The present invention discloses various embodiments and examples of a thickened aqueous abrasive cleanser capable of maintaining a smoothly flowable or plastic consistency over long periods of time. The cleanser is characterized by the ability to stably suspend abrasives while exhibiting excellent shelf stability over long periods of time with substantially no syneresis and being suitable for use where environmental requirements prevent the use of phosphates. This cleaner has the following ingredients: (a) a colloidal alumina thickener having an average particle size, in dispersion, of no more than about one micron; (b) an electrolyte/buffer; (c) a surfactant system including two surfactant components, one surfactant component comprising a fatty acid anionic surfactant, the other surfactant component comprising a selected bleach-stable surfactant or mixed surfactant; (d) a bleach; and (e) a particulate abrasive having an average particle size of about one to as much as 400 microns to provide scouring
The interaction of anionic surfactants sodium dodecylbenzenesulphonate (SDBS) and sodium bis (2-ethyl-1-hexylsulfosuccinate) (AOT) with the water treatment protein extracted from Moringa oleifera seeds has been investigated by surface tension measurements. The results were compared with previously reported studies using surface tension and zeta potential measurements of the same protein with an anionic surfactant sodium dodecylsulphate. There is a strong electrostatic interaction between the protein and the surfactants characterized by a local maximum at intermediate surfactant concentration. This surfactant concentration depends on the protein concentration and corresponds to the surfactant concentration at the point of charge reversal (zeta potential = 0 mV). The number of surfactant molecules required to neutralize the positive charges on the protein was found to be 8 per protein molecule ...
The interaction of anionic surfactants sodium dodecylbenzenesulphonate (SDBS) and sodium bis (2-ethyl-1-hexylsulfosuccinate) (AOT) with the water treatment protein extracted from Moringa oleifera seeds has been investigated by surface tension measurements. The results were compared with previously reported studies using surface tension and zeta potential measurements of the same protein with an anionic surfactant sodium dodecylsulphate. There is a strong electrostatic interaction between the protein and the surfactants characterized by a local maximum at intermediate surfactant concentration. This surfactant concentration depends on the protein concentration and corresponds to the surfactant concentration at the point of charge reversal (zeta potential = 0 mV). The number of surfactant molecules required to neutralize the positive charges on the protein was found to be 8 per protein molecule ...
ZAREI, Ali Reza; GHOLAMIAN, Forouzan y CHALAVI, Soheila. Micelle-mediated extraction and cloud point pre-concentration for the spectrophotometric determination of phenol in water samples. S.Afr.j.chem. (Online) [online]. 2011, vol.64, pp.158-162. ISSN 1996-840X.. In this paper, a cloud point extraction method for the determination of trace amounts of phenol by spectrophotometry is described. The method is based on the colour reaction of phenol with diazotized p-nitroanilinean alkaline media and the cloud point extraction of azo dye product using of nonionic surfactant Triton X-114. The effects of reaction and extraction parameters were studied and optimum parameters were established. The calibration graph was linear in the range of 2.0-400 ng mL-1 of phenol. Detection limit based on three times the standard deviation of the blank (3Sb) was 1.0 ng mL-1 and the relative standard deviation (RSD) for 50 ng mL-1 of phenol was 1.73 % (n = 10). The proposed method was applied for the determination of ...
Market Research Reports Search Engine (MRRSE) has been serving as an active source to cater intelligent research report to enlighten both readers and investors. This research study titled Sodium Lauryl Sulfate Market. Request a Free Sample Report @ https://www.mrrse.com/sample/984. Increasing demand for sodium lauryl sulfate (SLS), sodium laureth ether sulfate (SLES) and linear alkylbenzene sulfonate (LAS) from detergents & cleaners and personal care industries is expected to drive the global SLS, SLES & LAS market in the next five years. However, the adverse effect of SLS and SLES on human skin coupled with fluctuation in prices of linear alkylbenzene sulfonate is anticipated to hamper market growth. Emerging applications such as paints & coatings and oilfield chemicals are estimated to offer immense opportunities for players in the market. SLS, SLES and LAS are the major forms of anionic surfactants. However, LAS accounts for nearly 40% of the global anionic surfactants market.. The report ...
An oral composition for oral cleansing, breath freshening, and anti-microbial benefits includes Magnolia Bark Extract in combination with a surface active agent. The effectiveness of Magnolia Bark Extract in inhibiting biofilm formation in the oral cavity is increased by a synergistic combination of the Magnolia Bark Extract with a surface active agent in an oral cavity delivery agent, such as chewing gum, a confectionary, a lozenge, a compressed tablet, and an edible film.
Cetyltrimethylammonium Bromide found in: Cetyltrimethylammonium Bromide, Cetyltrimethylammonium Bromide, CTAB (Cetyltrimethylammonium bromide),..
A simple and rapid screening method for spectrophotometric determination of salbutamol based on mixed micelle-cloud point extraction (MM-CPE) coupled to derivatization with 4-aminoantipyrine reagent has been presented. A MM-CPE has been developed for the analysis of salbutamol in wastewater, pig feed and pork samples using Triton X-114 (TX-114) and cetyl trimethylammonium bromide (CTAB) as the mixed micellar extractant. The optimum MM-CPE conditions were: 10 mmol L-1 phosphate buffer pH 6.4, 5 mmol L-1 CTAB, 0.25% (w/v) TX-114, 10% (w/v) sodium chloride and 6 min equilibration time at 30 °C. And the optimum for derivatization were: 0.05 mol L-1 4-aminoantipyrine, 0.12 mol L-1 potassium hexacyanoferrate (III), 0.05 mol L-1 sodium carbonate and 1 min reaction time at room temperature. Under the selected condition, the proposed method gave linear calibrations in the range of 0.05 - 10 mg L-1. Limit of detection and limit of quantitation were 0.01 mg L-1 and 0.03 mg L-1, respectively. The proposed ...
Global Fatty Acid Ethoxylate Market 2017 Research Report proffers an acknowledged and extensive analysis of the immediate state of Fatty Acid Ethoxylate Market 2017.. In the first part, Fatty Acid Ethoxylate Industry study deals with the complete overview of the Fatty Acid Ethoxylate market, which consists of definitions, a wide range of statements, kinds and an entire Fatty Acid Ethoxylate industry chain structure. The global Fatty Acid Ethoxylate business analysis moreover consists of the ambitious landscape of Fatty Acid Ethoxylate industry, Fatty Acid Ethoxylate market expansion history and important development drifts presented by Fatty Acid Ethoxylate industry. Fatty Acid Ethoxylate trade introduces more extensive guidelines for a high growth potential industries professional survey with industry analysis. High Use of Fatty Acid Ethoxylate in Chemicals and Materials Industry Driving the Market Growth of Fatty Acid Ethoxylate.. To Get Sample Pages of Report here: ...
Frog sciatic nerves were excised and treated in a Ringers solution containing the surface-active agent, cetyltrimethylammonium bromide (CTMB). Such CTMB-treated nerves were compared to normal, untreated nerves with respect to their susceptibility to conduction block produced by six lipid-insoluble quaternary ammonium ions; the CTMB-treated nerves were rendered especially susceptible to rapid, reversible conduction block. A possible mechanism of CTMB action is proposed, involving chemo-dissection of permeability barriers which normally surround the individual axons. The findings that acetylcholine, curare, etc. can produce reversible, axonal conduction block in CTMB-treated nerves are not inconsistent with a theory of cholinergic impulse conduction.. ...
Make-up and cosmetics are used all over the world by all kinds of different people. Cosmetic products are defined as, ?a substance or preparation intended for placement in contact with any external part of the human body?. This definition can include a variety of products. Shampoos and soaps are products that usually contain some kind of fragrance and clean the skin by the use of surface-active agents, or surfactants. These surfactants are molecules that have both lipophilic and hydrophilic, or fat soluble and water soluble parts. The fat soluble part of the product clings to the oil and dirt as the water soluble part allows the lipophilic part to be washed away. Detergents for dishes and clothes work in pretty much the same way but will have different ingredients that make them more harsh for use on hard, solid surfaces. It is usually not a good idea to try and use these detergents on the body and hair, for it can lead to irritation. Lipstick is another cosmetic product that contains ...
ASTM-D1768 Standard Test Method for Sodium Alkylbenzene Sulfonate in Synthetic Detergents by Ultraviolet Absorption - sodium alkylbenzene sulfonate; synthetic detergents; ultraviolet absorption ;; ICS Number Code 71.100.40 (Surface active agents)
Business Directory for Sodium Lauryl Sulfate Suppliers in Pune - Get contact details of Sodium Lauryl Sulfate Manufacturers, Wholesale Sodium Lauryl Sulfate Exporters, Best Sodium Lauryl Sulfate Traders & Distributors Across the Pune.
Benzalkonium Chloride - CAS 8001-54-5 - Calbiochem CAS 8001-54-5 Cationic surface-active agent and germicide. Its effects are potentiated in the presence of di-n-butyl esters, such as diisobutyladipate. M.W. ~360. - Find MSDS or SDS, a COA, data sheets and more information.
Several microorganisms are currently being used as production platform for glycolipid biosurfactants, providing a greener alternative to chemical biosurfac
In this work, results from atomistic molecular dynamics studies investigating the effect of surfactant concentration on the transport properties of bulk surfactant aqueous solutions, focusing on the anionic surfactant sodium dodecyl sulfate (SDS), are reported. The surfactant self-diffusion and the thermal conductivity of bulk aqueous SDS solutions were computed at a range of concentrations at room and boiling temperatures. Additionally, MP2f (Akin-Ojo et al., 2008, Developing Ab Initio Quality Force Fields From Condensed Phase Quantum-Mechanics/Molecular-Mechanics Calculations Through the Adaptive Force Matching Method, J. Phys. Chem., 129, p. 064108), one of a new generation water potentials is assessed for its suitability in reproducing the transport and thermal properties of bulk water. The thermal conductivity of MP2f water model was found to be: 0.64 W/(m⋅K) at 298 K and 0.66 W/(m⋅K) at 373 K, in much better agreement with the experimental values compared to both the rigid and the ...
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Magnesium Dodecyl Sulfate - Surfactant - SAAPedia - SAAPedia(Surfactant.TOP),Surfactant,Anionic surfactants, Cationic surfactants, Non-ionic surfactants, Zwitterionic surfactants, Polymer Surfactants, Fluoro surfactants, Silicone surfactants, Biosurfactants, Natural surfactants, Special surfactants - Page1
Fatty acids, C16-18, esters with ethylene glycol - Surfactant - SAAPedia - SAAPedia(Surfactant.TOP),Surfactant,Anionic surfactants, Cationic surfactants, Non-ionic surfactants, Zwitterionic surfactants, Polymer Surfactants, Fluoro surfactants, Silicone surfactants, Biosurfactants, Natural surfactants, Special surfactants - Page1
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