Glycols
These versatile chemicals have a wide range of applications, including as solvents, antifreeze agents, and intermediates in the production of various materials.
Glycols exhibit unique physical and chemical properties, such as high boiling points, low freezing points, and the ability to form hydrogen bonds.
They play a crucial role in various industries, including pharmaceuticals, cosmetics, and automotive.
Researchers studying Glycols can leverage the power of PubCompare.ai, an AI-driven platform that enhances reproducibility and research accuracy in this field.
PubCompare.ai allows users to easily locate protocols from literature, preprints, and patents, while leveraging AI-driven comparisons to identify the best protocols and products.
Expereince the future of Glycols research optimization today with PubCompare.ai's cutting-edge technology.
Most cited protocols related to «Glycols»
Following purification, samples were concentrated to A280 = 55 using a 50 kDa concentrator to minimize the detergent concentration in the final sample, then aliquoted into thin-walled PCR tubes at 8 μL per aliquot. Aliquots were flash frozen in liquid nitrogen and stored at -80 °C for crystallization trials. For crystallization, samples were thawed and reconstituted into lipidic cubic phase with a 1:1 mass:mass ratio of lipid. The lipid stock consisted of a 10:1 mix by mass of 7.7 monoacylglycerol (generously provided by Martin Caffrey) with cholesterol (Sigma). Samples were reconstituted by the two syringe mixing method10 (link) and then dispensed into glass sandwich plates using a GryphonLCP robot (Art Robbins Instruments). In the case of the β2AR-adrenaline complex, 1 mM fresh adrenaline was mixed with receptor prior to reconstitution. Crystals were grown using 30 nL protein/lipid drops with 600 nL overlay solution, which consisted of 18 – 24 % PEG400, 100 mM MES pH 6.2 to pH 6.7, and 40 – 100 mM ammonium phosphate dibasic. Crystals grew in 1 – 3 days, and were harvested and frozen in liquid nitrogen for data collection.
Gi heterotrimer. The coupling reaction was allowed to proceed at
24 °C for 1 hour and was followed by addition of apyrase to catalyze
hydrolysis of unbound GDP, which destabilizes the nucleotide-free
complex40 . After one
more hour at 25 °C, a 4-fold volume of 20 mM Hepes pH 7.5, 100 mM NaCl,
1% lauryl maltose neopentyl glycol (L-MNG), 0.1% CHS was added
to the complexing reaction to initiate detergent exchange. After one hour
incubation at 25 °C to allow micelle exchange, 1 mM MnCl2 and
lambda phosphatase (New England Biolabs) were added to dephosphorylate the
preparation. This reaction was further incubated at 4 °C for 2 hours. To
remove excess G protein and residual DDM, the complexing mixture was purified by
M1 anti-FLAG affinity chromatography. Bound complex was first washed in a buffer
containing 1% L-MNG, followed by washes in gradually decreasing L-MNG
concentrations. The complex was then eluted in 20mM Hepes pH 7.5, 100mM NaCl,
0.01% MNG/0.001% CHS, 300 nM DAMGO, 5 mM EDTA, and FLAG peptide.
The eluted complex was supplemented with 100 μM TCEP to provide a
reducing environment. The tobacco etch virus (TEV) protease and human rhinovirus
3C protease were added to cleave the flexible μOR amino- and carboxy-
termini. Finally, a 1.2 molar excess of scFv16 was added to the preparation.
Once cleavage of the termini was confirmed by SDS-PAGE, the
μOR-Gi-scFv16 complex was purified by size exclusion
chromatography on a Superdex 200 10/300 column in 20mM Hepes pH 7.5, 100mM NaCl,
300 nM DAMGO, 0.00075% MNG and 000025% GDN. Peak fractions were
concentrated to ~7 mg/mL for electron microscopy studies.
Most recents protocols related to «Glycols»
Example 1
A glass article comprising aluminosilicate glass as commercially available under the designation AS 87 was first cleaned in an industrial dishwasher in order to clean the surfaces of the glass article from dirt such as grease, fingerprints, or the like. Then, a 0.25 wt % solution of a modified fluoroalkyl oligosiloxane in ethanol (1 g of fluoroalkyl oligosiloxane in 395 g of ethanol) was applied over the entire surface of the glass article. In this way, a surface of the glass article was made hydrophobic. More generally, without being limited to the example specifically described here, it is also possible that only an area of the at least one surface of the glass article is made hydrophobic, for example by covering the area or areas of the at least one surface, which are not intended to be hydrophobized. Subsequently, a 5% solution of a surfactant in ethanol and a mixture of different glycol ethers was applied to the hydrophobized surface of the glass article by spraying. Then, plasma etching was performed in a CF4-containing atmosphere in a microwave plasma at a pressure of 10 mbar.
Example 2
The Bioceramic compositions in Table 2, below, were prepared by mixing the liquid component (carrier) with the solid components in a mechanical stirrer, in the following sequence: sorosilicate, radiopacifier, rheology control agent and setting agent with speed below 500 rpm, approximately 45 minutes until complete homogenization.
Example 2
A glass article comprising a lithium aluminum silicate glass as commercially available under the designation LAS 80 was first cleaned in an industrial dishwasher in order to clean the surfaces of the glass article from dirt such as grease, fingerprints, or the like. Then, a 0.25 wt % solution of a modified fluoroalkyl oligosiloxane in ethanol (1 g of fluoroalkyl oligosiloxane in 395 g of ethanol) was applied over the entire surface of the glass article. In this way, a surface of the glass article was made hydrophobic. Subsequently, a 5% solution of a surfactant in ethanol and a mixture of different glycol ethers was applied to the hydrophobized surface of the glass article by spraying. Then, plasma etching was performed in a CF4-containing atmosphere in a microwave plasma at a pressure of 10 mbar.
Again, it is generally possible here that the at least one surface is not hydrophobized over its entire surface area, but only in an area of the surface.
Example 14
A 1 L round bottom flask equipped with a condensor was placed under a N2 atmosphere and charged with propylene imine (80.0 gram), n-butyl glycidyl ether (126.0 gram) and K2CO3 (10.00 gram) and heated to 80° C. in 30 min, after which the mixture was stirred for 21 h at T=80° C. After filtration the excess of PI was removed in vacuo, followed by further purification via vacuum distillation, resulting in a colorless low viscous liquid.
1.92 grams of the resulting material (1-butoxy-3-(2-methylaziridin-1-yl)propan-2-ol) was charged to a reaction flask equipped with a thermometer, together with 0.02 grams of bismuth neodecanoate and 19 grams of dimethylformamide. The mixture was stirred with a mechanical upper stirrer under a nitrogen atmosphere and heated to 50° C. A solution of 2.00 grams of Desmodur N 3600 in 19 grams of dimethylformamide was then added dropwise in 45 minutes to the reaction flask, whereafter the mixture was heated further to 70° C. Samples were taken at regular intervals and the reaction progress was monitored using a Bruker Alpha FT-IR spectrometer until no NCO-stretch at 2200-2300 cm−1 was observed. The solvent was removed in vacuo to obtain a clear, yellowish highly viscous liquid. The calculated molecular weight of the theoretical main component was 1065.74 Da, chemical structure is shown below.
Molecular weight was confirmed by Maldi-TOF-MS: Calcd. [M+Na+]=1088.74 Da; Obs. [M+Na+]=1088.76 Da. The following components with a mass below 580 Da were determined by LC-MS and quantified:
Performance of the synthesized compound as a crosslinker was assessed using spot tests on coating surfaces, based on procedures from the DIN 68861-1 standard. For these tests, 0.58 parts of the composition were mixed with 0.60 parts of Proglyde™ DMM (dipropylene glycol dimethyl ether, mixture of isomers) and incubated at 80° C. for 10 minutes under regular agitation. Subsequently, 0.79 parts of the resulting solution were added to 20 parts of NeoRez® R-1005 under continuous stirring, and the resulting mixture was further stirred for 30 minutes. Afterwards, this coating composition was filtered and applied to Leneta test cards using 100 μm wire rod applicators (Test 14-1). For reference, films were also cast from the same composition lacking a crosslinker (Test 14-2). The films were dried for 16 hours at 25° C., then annealed at 50° C. for 1 hour and further dried for 24 hours at 25° C. Subsequently, a piece of cotton wool was soaked in 1:1 EtOH:demineralized water and placed on the film for various timespans. After removal of the EtOH and 60 minutes recovery, the following results were obtained (a score of 1 indicates complete degradation of the film, 10 indicates no damage visible):
Example 1
A formulation of a suspension composition of the type in the present disclosure for 1000 gram fluid is listed in Table 1 below. The suspension composition was prepared and used in Examples 1 and 2.
The suspension composition was firstly used in stability tests. The suspension composition was kept static in a standing 25 ml measuring cylinder to observe mixture stability.
After 21 days from preparation, density of the suspension composition was checked from top, middle and bottom portion of the suspension composition and shown in Table 2.
As shown in
Physical properties were measured for the suspension composition and shown in Table 3 below.
Example 2
Wellbore servicing fluids were prepared using a dry powder suspending agent or the suspension composition in Example 1. Test conditions and formulas of the wellbore servicing fluids are listed in Tables 4 and 5. The amounts of the cement blend composition are based on the total weight of the cement blend. The amount of the dry powder suspending agent is based on the total weight of the cement blend, while the dry powder suspending agent is not a part of the cement blend. Both of the wellbore servicing fluids had a density of 14.60 lbm/gal and a specific gravity of 1.75. The amount of the dry powder suspending agent in wellbore servicing fluid 1 (WSF1) was 1.3 g per 600 ml WSF1, which was equivalent to the amount of the crosslinked guar gum in wellbore servicing fluid 2 (WSF2).
Table 6 below shows 24 hr sonic compressive strength is lower in WSF2 compared to WSF1, however other properties are comparable.
Table 7 shows that the rheology data measured by a Fann® Model 35 viscometer for WSF 1 and WSF 2 are comparable.
Further, WSF1 and WSF2 were cured at 168° F./5.000 psig for 7 days and then tested for mechanical properties. The results are in Table 8 below.
The experiments demonstrate the following. 7 days curing data shows there was no adverse effect of the use of the suspension composition on mechanical properties of set cement. UCA Compressive Strength shows a slight delay in strength development for WSF2. Regarding to other slurry properties such as mixability, free fluid, rheology, gel strength, and fluid loss, there was no adverse effect of the use of the suspension composition by comparing WSF1 and WSF2.
Top products related to «Glycols»
More about "Glycols"
These versatile chemicals exhibit a wide range of applications, serving as solvents, antifreeze agents, and intermediates in the production of various materials.
Glycols, such as ethylene glycol, propylene glycol, and 1,4-butanediol, possess unique physical and chemical properties, including high boiling points, low freezing points, and the ability to form hydrogen bonds.
These properties make them indispensable in numerous industries, including pharmaceuticals, cosmetics, and automotive.
Researchers studying glycols can leverage the power of PubCompare.ai, an AI-driven platform that enhances reproducibility and research accuracy in this field.
PubCompare.ai allows users to easily locate protocols from literature, preprints, and patents, while utilizing AI-driven comparisons to identify the best protocols and products.
This cutting-edge technology can help optimize glycols research, including the use of related compounds like lauryl maltose neopentyl glycol, FBS, polyvinyl alcohol, Vitrobot Mark IV, acetone, penicillin/streptomycin, Tween 80, and ethanol.
Experience the future of glycols research optimization today with PubCompare.ai's innovative solutions.