Tween Sorbitan monolaurate

D Polyoxyethylene carbohydrate-20 Fatty alkylester D1 Polyoxyethylene sorbitan monolaurate, TWEEN... 

Surfactants (nonionic)— polyethylene sorbitan monolaurate (Tween 20, Tween 80), pluronic, Triton, sodium dodecyl sulfate (SDS)... 

Figure 7 indicates the phase behavior of SOW systems containing ternary nonionic surfactant mixtures that in turn contain a very hydrophilic surfactant (Tween 60 Sorbitan -i- 20 EO stearate), a very hpophihc surfactant (Span 20 Sorbitan monolaurate), and an intermediate (Tween 85 Sorbitan 20 EO trioleate or Nonylphenol with an average of 5 EO groups). The two intermediate surfactants correspond exactly to an optimum formulation in the physicochemical conditions, i.e., they exhibit three-phase behavior with the system 1 wt. % NaCl brine-heptane-2-butanol. As the intermediate hy-drophihcity surfactant is replaced by an equivalent mixture of the extreme ... 

Tween 20 (polyoxyethylene (20) Sorbitan Monolaurate, Wako Pure Chemical Industries, Ltd, Osaka, Japan). 

Egelrud and Olivecrona (1973) studied the catalytic activity against several substrates of bovine milk enzyme preparations that had been purified about 7000-fold to a purity higher than 80% (Egelrud and Olivecrona 1972). The enzyme catalyzed the hydrolysis of emulsified trioleate, trioctanoate, monooleate, Tween 20 (polyoxyethylene sorbitan monolaurate), and p-nitrophenyl acetate. It was concluded that the enzyme had rather low substrate specificity and that the presence of activating serum factors is not needed for catalysis to occur. 

Cholera toxin B subunit-biotin labeled (lyophilized powder, biotin content 0.9mol/mol protein), peroxidase-labeled IgG anti-rabbit antibody (HRP-Ab, from goat, protein content 0.8mg/ml, affinity isolated antibody), anti-cholera toxin (from rabbit, protein content 48mg/ml, purified toxin from Vibrio cholerae), biotin monoclonal anti-rabbit IgG -y-chain specific (from mouse, protein content 4.2mg/ml), glucose oxidase-biotinamidocaproyl labeled (GOX-B, from Aspergillus niger, lyophilized powder containing 40-70% protein, 137 U/mg), polyoxyeth-ylene-sorbitan monolaurate (Tween 20), bovine serum albumin (fraction... 

Tween 20, Chemical Classification - Ethoxylated Fatty Acids, Chemical Description -Polyoxyethylene (20) Sorbitan Monolaurate, Hydrophile-Lipophile Balance (HLB) 16.7, Uniqema, 1000 Uniqema Blvd., New Castle, Delaware 19720. 

The polysorbates used most regarding efflux pump inhibition are polyoxyethylene sorbitan monolaurates (Tween 20), polyoxyethylene sorbitan monopalmi-tates (Tween 40) and polyoxyethylene sorbitan monooleates (Tween 80). Various studies demonstrate the ability of polysorbates to inhibit efflux pumps. In transport experiments across intestinal mucosa, the efflux ratio (basolateral to apical drug transport/apical to basolateral drug transport) of rhodamine 123 was reduced in the presence of Tween 80 (Shono et al. 2004). In another study, Zhang et al. demonstrated enhanced absorption of the P-glycoprotein substrate digoxin in rats in the presence of Tween 80 (Zhang et al. 2003). 

Polyoxyethylene sorbitan monolaurate (Polysorbate 20 or Tween 20) 0 II CH20(CH Hfi)z1CH2CH20—C CH2(CH2)9CH3 I... 

The solutions of surface-active materials were made up in distilled water to a concentration of 1.0 gram/dl. Mixtures of Span 80 and Tween 80 were used to obtain HLB-values of 8, 10, 12, ana 14 a mixture of Tween 20 and Tween 80 for 16 and a commercial product with the composition polyoxyethylene (40) sorbitan monolaurate gave an HLB... 

The presence of 0.1%(v/v) of polyoxyethylene sorbitan monolaurate (Tween-20) in all buffers during the processing of the membrane asasts the prevention of nonspecific binding. 

PBST (PBS plus 0.1% Polyoxyethylene sorbitan monolaurate (Tween 20 Sigma). 

Changes in protein volume during the displacement of a spread p-lactoglobulin from an air-water interface by the nonionic surfactant (polyoxyethylene sorbitan monolaurate) Tween 20. 

Competitive displacement of spread (3-lactoglobulin from an air-water interface by (a) nonionic and (b) ionic surfactants. The collapse of the protein network is indicated by showing the change in area occupied by the protein at the interface as a function of surface pressure, (a) Data for A-Tween 20 (polyoxyethylene sorbitan monolaurate) and B-Tween 60 (polyoxyethylene sorbitan momostearate). (b) Data for A-cetyl-trimethyl-ammonium bromide (CTAB), B-lyso-phosphatidylcholinelauroyl (LPC-L), and -sodium dodecyl sulphate (SDS). 

AFM images showing the displacement of a spread (3-lactoglobulin protein film from an air-water interface by the progressive addition of surfactant, (a) Displacement with (polyoxyethylene sorbitan monolaurate) Tween 20, surface pressure Tr=22.5mN/m, image size 3.2 X 3.2 jam. (b) Displacement with cetyl-trimethyl-ammonium bromide (CTAB), TT = 22.8 mN/m, image size 1x1 /rm. (c) Displacement with CTAB in the presence of 0.2 M sodium phosphate buffer, pH — 7, ir— 22.8 mN/m. scan size 1x1 /rm. Data are shown at similar surface pressures in order to allow comparison of domain sizes for ionic and nonionic surfactants. 

Comparison of the competitive displacement of spread films of whey protein isolate (WPI) and (3-lactoglobulin from an air-water interface with the nonionic surfactant (polyoxyethylene sorbitan monolaurate) Tween 20. Note that the WPI network remains intact at surface pressures (tt) above those at which the (3-lactoglobulm network has failed. The image sizes are indicated in brackets below the images. 

Polyoxyethylene (20) sorbitan monolaurate - Tween 20 Polyoxyethylene (20) sorbitan monopalmitate - Tween 40 Polyoxyethylene (20) sorbitan monostearate - Tween 60 Polyoxyethylene (20) sorbitan mono-oleate - Tween 80 Polyoxyethylene (20) sorbitan tristearate - Tween 65 Polyoxyethylene (20) sorbitan tri-oleate - Tween 85. 

McClements and Dungan reported, based on light scattering measurements, that the Sauter or surface-volume mean diameter of drops in a dilute emulsion of n-hexadecane in water remained constant while the number of drops decreased with time during solubilization of the hydrocarbon into a 2 wt% solution of Tween 20 (sorbitan monolaurate). Weiss et al. found similar results for the same surfactant with n-tetradecane and n-octadecane. This result, which seems surprising in... 

Tween 20 Tween 60 Polyoxyethylene (20) sorbitan monolaurate Polyoxyethylene (20) sorbitan monostearate 1227 1312 3.0 x 10-6... 

CTAB cetyltrimethylammonium bromide, DTAB dodecyltrimethylammonium bromide, BDAC benzyltetradecyldimethylammonium chloride, Span 40 sorbitan monopalmitate, Tween 40 polyoxyethylene(40)sorbitan monolaurate, Aliquat 336 tricaprylmethylammoniurn chloride, DPPC dipalmitoylphosphatidylcholine... 

Tween 80 poly(oxyethylene)2o-sorbitan-monooleate Tween 20 poly(oxyethylene)2o-sorbitan-monolaurate SSF simultaneous saccharification and fermentation... 

Enzyme activity loss because of non-productive adsorption on lignin surface was identified as one of the important factors to decrease enzyme effectiveness, and the effect of surfactants and non-catalytic protein on the enzymatic hydrolysis has been extensively studied to increase the enzymatic hydrolysis of cellulose into fermentable sugars [7, 9 19]. The reported study showed that the non-ionic surfactant poly(oxyethylene)2o-sorbitan-monooleate (Tween 80) enhanced the enzymatic hydrolysis rate and extent of newspaper cellulose by 33 and 14%, respectively [20]. It was also found that 30% more FPU cellulase activity remained in solution, and about three times more recoverable FPU activity could be recycled with the presence of Tween 80. Tween 80 enhanced enzymatic hydrolysis yields for steam-exploded poplar wood by 20% in the simultaneous saccharification and fermentation (SSF) process [21]. Helle et al. [22] reported that hydrolysis yield increased by as much as a factor of 7, whereas enzyme adsorption on cellulose decreased because of the addition of Tween 80. With the presence of poly(oxyethylene)2o-sorbitan-monolaurate (Tween 20) and Tween 80, the conversions of cellulose and xylan in lime-pretreated com stover were increased by 42 and 40%, respectively [23]. Wu and Ju [24] showed that the addition of Tween 20 or Tween 80 to waste newsprint could increase cellulose conversion by about 50% with the saving of cellulase loading of 80%. With the addition of non-ionic, anionic, and cationic surfactants to the hydrolysis of cellulose (Avicel, tissue paper, and reclaimed paper), Ooshima et al. [25] subsequently found that Tween 20 was the most effective for the enhancement of cellulose conversion, and anionic surfactants did not have any effect on cellulose hydrolysis. With the addition of Tween 20 in the SSF process for... 

Common emulsifiers were tested in over 1,200 eczema patients in Finland (Hannuksela et al. 1976 b). Allergic reactions were found in 21% of those tested, the great majority of the patients were also sensitive to other substances. The emulsifiers responsible for the positive reactions in 0.3%-0.7% of the cases were Lanet-te (sorbitan sesquioleate), the Spans (polyoxyethylene oxypropylene stearate), polyoxyethylene sorbitol lanolin derivative and triethanolamine stearate. Tweens were positive in only two cases. Maibach and Connant (1977) reported contact urticaria to polysorbate 60 (Tween 60). Sorbitan monolaurate in a hydrocortisone cream (Alphaderm) caused allergic contact dermatitis in a woman after treatment with Alphaderm for 1 week (Finn and Forsyth 1975). 

Maisine 35-1 Monooctadecadienoic acid ester of glycerol 3 Tween 20 PEG-20 sorbitan monolaurate 17... 

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