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Glycols

Glycols are a class of organic compounds containing two hydroxyl (-OH) groups attached to a carbon chain.
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.
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Most cited protocols related to «Glycols»

Untagged human M2 muscarinic acetylcholine receptor was expressed in Sf9 cells with the third intracellular loop replaced with T4 lysozyme, then extracted with digitonin and sodium cholate and purified by ligand affinity chromatography, then exchanged into decyl maltoside buffer. Purified receptor was crystallized by the lipidic cubic phase technique following addition of a stabilizing neopentyl glycol detergent. Data collection was performed at Advanced Photon Source beamlines 23ID-B and 23ID-D, and the structure solved by molecular replacement. Refinement statistics are given in Supplementary Table 2.
Publication 2011
Buffers Chromatography, Affinity Cuboid Bone Detergents Digitonin Glycols Homo sapiens Ligands Lipids Muramidase Muscarinic Acetylcholine Receptor Protoplasm Sf9 Cells Sodium Cholate
Untagged human M2 muscarinic acetylcholine receptor was expressed in Sf9 cells with the third intracellular loop replaced with T4 lysozyme, then extracted with digitonin and sodium cholate and purified by ligand affinity chromatography, then exchanged into decyl maltoside buffer. Purified receptor was crystallized by the lipidic cubic phase technique following addition of a stabilizing neopentyl glycol detergent. Data collection was performed at Advanced Photon Source beamlines 23ID-B and 23ID-D, and the structure solved by molecular replacement. Refinement statistics are given in Supplementary Table 2.
Publication 2011
Buffers Chromatography, Affinity Cuboid Bone Detergents Digitonin Glycols Homo sapiens Ligands Lipids Muramidase Muscarinic Acetylcholine Receptor Protoplasm Sf9 Cells Sodium Cholate
Human β2AR fused to an amino-terminal T4 lysozyme23 (link) was expressed and purified as described above. Following purification by alprenolol sepharose, the receptor was washed extensively with 30 μM of the low affinity antagonist atenolol while bound to FLAG affinity resin to fully displace alprenolol, then washed and eluted in buffer devoid of ligand to produce a homogeneously unliganded preparation. The receptor was then incubated for 30 minutes at room temperature with a stoichiometric excess of ligand (HBI or BI167107). A 1.3-fold molar excess of Nb6B9 was then added, and the sample was dialyzed overnight into a buffer consisting of 100 mM sodium chloride, 20 mM HEPES pH 7.5, 0.01% lauryl maltose neopentyl glycol detergent, and 0.001% cholesteryl hemisuccinate. In each case, ligand was included in the dialysis buffer at 100 nM concentration or higher. The sample was then concentrated using a 50 kDa spin concentrator and purified over a Sephadex S200 size exclusion column in the same buffer as for dialysis, and the β2AR-Nb6B9-ligand ternary complex was isolated. In the case of adrenaline, the low affinity and chemical instability of the ligand precluded overnight dialysis, so 100 μM adrenaline was added to receptor for 30 minutes at room temperature, then a 1.3-fold molar excess of Nb6B9 added and the sample was incubated for 30 minutes at room temperature. Following incubation, the sample was concentrated and immediately purified by size exclusion as above.
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.
Publication 2013
Alprenolol ammonium phosphate Atenolol BI167107 Buffers Cholesterol cholesterol-hemisuccinate Crystallization Cuboid Bone Detergents Dialysis Epinephrine Freezing Glycols HEPES Homo sapiens Ligands Lipids Maltose Molar Monoglycerides Nitrogen polyethylene glycol 400 Proteins Resins, Plant sephadex Sepharose Sodium Chloride Syringes
Purified DAMGO-bound μOR was mixed with a 1.2 molar excess of
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.
Publication 2018
Apyrase Chromatography, Affinity Complex Mixtures Cytokinesis Detergents Edetic Acid Electron Microscopy Enkephalin, Ala(2)-MePhe(4)-Gly(5)- FLAG peptide Glycols GTP-Binding Proteins HEPES Homo sapiens Maltose manganese chloride Micelles Molar Nucleotides Peptide Hydrolases Phosphoric Monoester Hydrolases SDS-PAGE Sodium Chloride TEV protease tris(2-carboxyethyl)phosphine
Purified DAMGO-bound μOR was mixed with a 1.2 molar excess of
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.
Publication 2018
Apyrase Chromatography, Affinity Complex Mixtures Cytokinesis Detergents Edetic Acid Electron Microscopy Enkephalin, Ala(2)-MePhe(4)-Gly(5)- FLAG peptide Glycols GTP-Binding Proteins HEPES Homo sapiens Maltose manganese chloride Micelles Molar Nucleotides Peptide Hydrolases Phosphoric Monoester Hydrolases SDS-PAGE Sodium Chloride TEV protease tris(2-carboxyethyl)phosphine

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.

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Patent 2024
aluminosilicate Atmosphere Ethanol Ethers Glare Glycols Microwaves Plasma Pressure Surface-Active Agents

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.

TABLE 2
Bioceramic compositions
Non-aqueous Paste
Rheology
Liquidcontrol
SampleSorosilicateRadiopacifiercarrieragentSetting agent
CB 3HardystoniteCalciumPolyethyleneSiliconCalcium
26%tungstateglycoloxidesulfate/potassium
37%25%2%sulfate
10%
CB 4Strontium-CalciumPolyethyleneSiliconCalcium
akermanitetungstateglycoloxidesulfate/potassium
35%35%25%2%sulfate
3%
CB 5AkermaniteZirconiumPolyethyleneSiliconCalcium
22%oxideglycoloxidesulfate/potassium
35%33%2%sulfate
8%
CB 6AkermaniteZirconiumPolyethyleneSiliconCalcium
30%oxideglycoloxidesulfate/potassium
28%29%4%sulfate
9%

Full text: Click here
Patent 2024
akermanite Calcium, Dietary Glycols Oxides Paste Polyethylenes Potassium-37 Silicon-29 Strontium Sulfates, Inorganic tungstate Zirconium

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.

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Patent 2024
Aluminum Atmosphere Ethanol Ethers Glare Glycols Lithium Microwaves Plasma Pressure Silicates Surface-Active Agents

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.

[Figure (not displayed)]

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:

[Figure (not displayed)]
was present in the composition at 0.36 wt. % and

[Figure (not displayed)]
was present at less than 0.01 wt. %.

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):

Ethanol spot test
Sample30 min60 min120 min300 min
Test 14-18887
Test 14-21111
Genotoxicity test
Without S9 rat liver extractWith S9 rat liver extract
Bscl 2RtknBscl 2Rtkn
concentration →
102550102550102550102550
Ex. 141.11.11.10.80.80.61.01.00.90.90.80.6

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Patent 2024
Atmosphere Aziridines Bismuth CD3EAP protein, human Desmodur N dimethyl ether Dimethylformamide Distillation Ethanol farnesyl-protein transferase-alpha Filtration Glycols Gossypium Isomerism Liver Extracts Mutagenicity Tests n-butyl glycidyl ether Nitrogen potassium carbonate propyleneimine Solvents Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization Thermometers Vacuum Viscosity

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.

TABLE 1
Suspension Composition
ComponentAmount (g)
Crosslinked guar gum100.00
Monoethylene glycol (MEG)898.80
Suspension Viscosifier1.20

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.

TABLE 2
Density across different portions
DensitySpecific
Section(lbm/gal)gravity (SG)
Top portion9.561.146
Middle portion9.551.144
Bottom portion9.561.146

As shown in FIG. 9, after 28 days from preparation, there was no visible separation of the suspension composition and the suspension composition was pourable. The results show that suspension composition was stable and uniformly dispersed throughout the suspension composition.

Physical properties were measured for the suspension composition and shown in Table 3 below.

TABLE 3
Physical properties
FormLiquid
AppearanceYellow fluid
wt. % Solids10
pH (1% suspension 7-8
composition in water)
Brookfield viscosity (cP)*100-400
SG1.145
Density (lbm/gal)9.555
*B1, 75° F., 100 rpm

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 4
Test conditions
Bottomhole circulating 129° F.
temperature (BHCT)
Bottomhole static 168° F.
temperature (BHST)
Heating Time  60 min
Pressure5000 psi 

TABLE 5
Wellbore servicing fluids, 14.6 lbm/gal
Mixing
DescriptionUnitWSF1WSF2procedure
Cement Blend Composition
Cementitious materialwt. %98.0498.04PB
Expansion agentwt. % 1.96 1.96PB
Other Materials
Dry powder suspending%  0.20PH
agentBWOB
Suspension compositionL/100 kg 1.76PH
DefoamerL/100 kg 0.09 0.09PH
RetarderL/100 kg 1.00 1.00PH
Fluid loss control agentL/100 kg 7.70 7.70PH
Free fluid control additiveL/100 kg 3.60 3.60PH
WaterL/100 kg48.6747.30
BWOB: By Weight of Cement Blend
PB: Pre-blend (added to the cementitious material as a part of the cement blend)
PH: Pre-hydrate (added to water before adding the cement blend)

Table 6 below shows 24 hr sonic compressive strength is lower in WSF2 compared to WSF1, however other properties are comparable.

TABLE 6
Performance comparison
Performance TestsWSF1WSF2
Mixability rating (0-5), 0 is not mixable44
Free Fluid, 45 degree inclination 00
angle (%)
API Fluid loss (ml/30 min)4438
API Static Gel Strength (10 sec/10 min)1/92/16
Thickening Time, 70 Bc (hh:mm)07:5007:00
50 psi UCA Compressive Strength 10:1510:26
(hh:mm)
500 psi UCA Compressive Strength 13:4015:05
(hh:mm)
24 hr UCA Compressive Strength (psig)1253956

Table 7 shows that the rheology data measured by a Fann® Model 35 viscometer for WSF 1 and WSF 2 are comparable.

TABLE 7
FANN ® 35 Rheology Data
68° F.129º F.190º F.
RPMWSF1WSF2WSF1WSF2WSF1WSF2
3112345
6223557
308711141622
60131319232635
100212128333648
200383948556076
3005355667580102

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.

TABLE 8
Mechanical properties
TestsWSF1WSF2
Crush Compressive Strength (psig)35823926
Std. Dev. (psig)7643
Young's Modulus (Mpsig)0.8900.954
Std. Dev. (Mpsig)0.0140.015
Brazilian Tensile Strength (psig)464472
Std. Dev. (psig)1354

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.

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Patent 2024
Dental Cements Diet, Formula GAL-1 Glycols Gravity guar gum LGALS9 protein, human Physical Processes Powder Pressure Viscosity

Top products related to «Glycols»

Sourced in United States
Lauryl maltose neopentyl glycol is a non-ionic detergent used in the solubilization and stabilization of membrane proteins. It is a milder detergent compared to traditional ionic detergents, making it suitable for maintaining the native structure and function of proteins.
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Fetal Bovine Serum (FBS) is a cell culture supplement derived from the blood of bovine fetuses. FBS provides a source of proteins, growth factors, and other components that support the growth and maintenance of various cell types in in vitro cell culture applications.
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Polyvinyl alcohol is a synthetic, water-soluble polymer. It is commonly used as a raw material in the production of various laboratory equipment and supplies.
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The Vitrobot Mark IV is a cryo-electron microscopy sample preparation instrument designed to produce high-quality vitrified specimens for analysis. It automates the process of blotting and plunge-freezing samples in liquid ethane, ensuring consistent and reproducible sample preparation.
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Penicillin/streptomycin is a commonly used antibiotic solution for cell culture applications. It contains a combination of penicillin and streptomycin, which are broad-spectrum antibiotics that inhibit the growth of both Gram-positive and Gram-negative bacteria.
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Tween 80 is a non-ionic surfactant and emulsifier. It is a viscous, yellow liquid that is commonly used in laboratory settings to solubilize and stabilize various compounds and formulations.
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1,4-butanediol is a colorless, viscous chemical compound that is commonly used as a laboratory reagent. It has a molecular formula of C4H10O2 and a molecular weight of 90.12 g/mol. 1,4-butanediol is a versatile compound that can be used for various applications in research and development.
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Ethanol is a clear, colorless liquid chemical compound commonly used in laboratory settings. It is a key component in various scientific applications, serving as a solvent, disinfectant, and fuel source. Ethanol has a molecular formula of C2H6O and a range of industrial and research uses.

More about "Glycols"

Glycols are a diverse class of organic compounds characterized by the presence of two hydroxyl (-OH) groups attached to a carbon chain.
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.