Tween 80
It is derived from polyethoxylated sorbitan and oleic acid, and has a hydrophile-lipophile balance (HLB) value of 15, making it soluble in both aqueous and organic media.
Tween 80 is known for its ability to enhance the solubility, stability, and bioavailabilty of various drug formulations.
It is also utilized in cell culture media, protein purification, and as a emulsifier or detergent in a variety of research and industrial processes.
Tween 80 has a low toxicity profile and is generally considered safe for human use, though occassional skin irritation or allergic reactions may occur in some individuals.
Most cited protocols related to «Tween 80»
As an alternative to immuno-staining, in some experiments we revealed plaques as areas of destroyed cells. To this end, after removing the overlays, we stained the cells with 1% crystal violet solution in 20% methanol in water.
M. smegmatis mc2155 [72] (link), M. tuberculosis H37Rv and Escherichia coli NEB-10β (New England Biolabs UK Ltd) were used in this work. M. smegmatis and M. tuberculosis were grown on Middlebrook 7H11 agar medium (BD Diagnostics) supplemented with 0.5% glycerol and 10% oleic acid albumin-dextrose-catalase (OADC) (BD Diagnostics). When required, filter-sterilised luciferin was added at a final concentration of 0.157 mM. Liquid cultures of M. smegmatis and M. tuberculosis were grown either in Middlebrook 7H9 broth (BD Diagnostics) containing 0.05% Tween 80 (Sigma) and 10% albumin-dextrose-catalase (ADC) enrichment (BD Diagnostics), or (for M. smegmatis Gluc assays) in Luria-Bertani (LB) medium with 0.05% Tween. LB medium was preferred for the Gluc assays because the background of coelenterazine was 100 times lower in that medium than in 7H9 broth. LB medium was used for culturing E. coli. All the strains were grown at 37°C. The following antibiotics were added when appropriate: ampicillin [100 µg ml−1 (Sigma)], hygromycin B [150 µg ml−1 (Invitrogen)] and kanamycin [25 µg ml−1, for mycobacteria, 50 µg ml−1 for E. coli (Sigma)].
In addition to collection and titration of saliva, 5 females at different days pi were tested for the presence of CHIKV on head squashes to evaluate the relation between the presence of CHIKV in saliva and head squashes positive by IFA.
Most recents protocols related to «Tween 80»
Example 2
Thuricide BT Caterpillar Control (Southern Ag) was used as the source of viable Bacillus thuringiensis spores (6 million spores/mg). A dilution series was produced from Thuricide BT to show that the material is viable and could be readily cultured on Petrifilm plates. Three DEE chemical compositions were evaluated: (1) about 0.06 M copper (II) chloride in water, (2) about 1 wt.-% surfactant and about 10 wt.-% PCSR in water, and (3) about 1 wt.-% surfactant and about 1 wt.-% PCSR in water. OxiClean was used as the PCSR and Tween 80 as the surfactant. During testing of each DEE composition, the DEE composition was added to the spores to yield a 1:100 dilution of spores and exposed to 2.45 GHz microwave radiation for about 10 s. After exposure, the cells were centrifuged and washed to remove the DEE composition and then plated on Petrifilm and cultured for 24 h at 30° C. When using each of the three DEE compositions shown above, the decontamination method destroyed BT spores at 6-7 log kill levels and demonstrated the efficacy of bleach-free treatments.
Example 3
Penicillium roqueforti spores were suspended in water. Four DEE chemical compositions were evaluated: (1) 0.06 M copper (II) ions in water, (2) 1 wt.-% surfactant and 10 wt.-% PCSR, (3) 1 wt.-% surfactant and 1 wt.-% PCSR, and (4) 0.5 wt.-% bleach. OxiClean was used as the PCSR and Tween 80 as the surfactant. Clorox was used as bleach. Each DEE composition was added to 0.1 mg/ml suspension of mold spores and exposed to 2.45 GHz microwave for 10 s. After exposure, the cells were centrifuged, washed to remove the DEE chemicals and then plated on Petrifilm and cultured. With the DEE composition 0.06 M copper (II) ions in water and 1 wt.-% surfactant and 10 wt.-% sodium percarbonate, a 6-7 log reduction in P. roqueforti spores (6-7 log kill levels) was realized.
Example 6
The efficacy of model compound UBX1967 was studied in the mouse oxygen-induced retinopathy (OIR) model, which provides an in vivo model of retinopathy of prematurity (ROP) and diabetic retinopathy.
C57Bl/6 mouse pups and their CD1 foster mothers were exposed to a high oxygen environment (75% 02) from postnatal day 7 (P7) to P12. At P12, animals were injected intravitreally with 1 μl test compound (200, 20, or 2 uM) formulated in 1% DMSO, 10% Tween-80, 20% PEG-400, and returned to room air until P17. Eyes were enucleated at P17 and retinas dissected for either vascular staining or qRT-PCR. To determine avascular or neovascular area, retinas were flatmounted, and stained with isolectin B4 (IB4) diluted 1:100 in 1 mM CaCl2. For quantitative measurement of senesecence markers (e.g., Cdkn2a, Cdkn1a, 116, Vegfa), qPCR was performed. RNA was isolated and cDNA was generated by reverse-transcription, which was used for qRT-PCR of the selected transcripts.
These results show that a single ocular injection of UBX1967 can functionally inhibit pathogenic angiogenesis and promote vascular repair in this key OIR disease model. We believe that efficacy of UBX1967 in the OIR model is due to elimination of senescent cells and accompanying SASP that propagates senescence in retinal cells and promotes neovascularization of retinal vessels.
Example 9
Myc-inhibitor-1 may be synthesized (
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More about "Tween 80"
Derived from polyethoxylated sorbitan and oleic acid, it possesses a hydrophile-lipophile balance (HLB) value of 15, allowing it to be soluble in both aqueous and organic media.
Tween 80's ability to enhance the solubility, stability, and bioavailability of various drug formulations makes it a valuable excipient in drug delivery systems.
It is commonly used in cell culture media, protein purification processes, and as an emulsifier or detergent in numerous research and industrial applications.
Comparable nonionic surfactants like Span 80 and DMSO are also utilized for similar purposes.
In addition to its pharmaceutical and biochemical applications, Tween 80 finds use in cosmetic formulations, where it can act as a solubilizer, emulsifier, or wetting agent.
Its low toxicity profile and generally good safety for human use, although occassional skin irritation or allergic reactions may occur in some individuals, contribute to its widespread adoption.
When working with Tween 80, it is important to consider its compatibility and potential interactions with other commonly used solvents and reagents, such as methanol, ethanol, glycerol, and acetonitrile.
Carefully selecting the appropriate Tween 80 products and optimizing protocols, as facilitated by tools like PubCompare.ai, can help ensure the reproducibility and accuracy of your research involving this versatile surfactant.