Monoethanolamine

Manufactured by Merck Group

Sourced in Germany

Monoethanolamine is a chemical compound primarily used as a pH adjuster and buffer in various laboratory applications. It maintains the desired pH levels in solutions, enabling optimal conditions for experiments and analyses.

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Lab products found in correlation

16 protocols using monoethanolamine

Colloidal Synthesis of Inorganic Nanomaterials

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Cadmium oxide (99.5%, powder), 2-ethylhexanoic acid (2-EHA, 99%), 1-octadecene (ODE, technical grade, 90%), oleylamine (OLA, technical grade, 70%), hexadecylamine (technical grade, 90%), trioctylamine (98%), trioctylphisphine (TOP, technical grade, 97%), selenium powder (powder, 100 mesh, 99.5%), zinc oxide (puriss, 99–100%), thiourea (TU, ACS Reagent,>99%), triethylene glycol dimethyl ether (TEGDME, 99%), hexadecylamine (technical grade, 90%), palmitic acid (BioXtra, ≥99%) zinc acetate dihydrate (ACS reagent, ≥99.0%), magnesium acetate tetrahydrate (ACS reagent, ≥98%), aluminium chloride hexahydrate (99%), gallium nitrate hydrate (99.9%), lithium chloride (anhydrous, ACS reagent, ≥99%), tetramethylammonium chloride (TMACl, reagent grade, ≥98%), potassium hydroxide (reagent grade, 90%), dimethyl sulfoxide (DMSO, anhydrous, ≥99.9%), and monoethanolamine (MEA, ACS reagent, ≥99.0%) were purchased from Sigma-Aldrich. n-Hexadecylphosphonic acid (97%) was from PlasmaChem GmbH. Methyl acetate (extra pure, 99%) was from Acros. Hexane, n-octane, toluene, acetone, methanol, ethanol, n-butanol, and isopropyl alcohol of spectroscopy grade were purchased from the local supplier Ekos-1. All reagents were used as received, without purification.

Alexandrov A., Zvaigzne M., Lypenko D., Nabiev I, & Samokhvalov P. (2020). Al-, Ga-, Mg-, or Li-doped zinc oxide nanoparticles as electron transport layers for quantum dot light-emitting diodes. Scientific Reports, 10, 7496.

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Preparation of 10-HSA-monoethanolamine complexes

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Monoethanolamine was purchased from Sigma Aldrich (Saint Quentin Fallavier, France) and was used as received. The 10-HSA was obtained using the following method [34 (link)]. The 10-HSA was weighed precisely in a tube, then ultrapure water was added so that the concentration was 10 mg·mL⁻¹ (1 wt % in water). Next, the desired volume of a 1 mol·L⁻¹ Monoethanolamine solution prepared in MilliQ water was incorporated to reach equivalence (molar ratio = n_{Monoethanolamine}/n_10-HSA = 1, with n representing the molar concentration in mol·L⁻¹). The mixture was heated at 80 °C for 15 min until all the 10-HSA powder was fully dispersed and was then vortexed. Samples were further stored at 4 °C and, prior to use, they were heated again to around 80 °C for 5 min and then cooled to room temperature.

Dari C., Cousin F., Le Coeur C., Dubois T., Benezech T., Saint-Jalmes A, & Fameau A.L. (2023). Ultrastable and Responsive Foams Based on 10-Hydroxystearic Acid Soap for Spore Decontamination. Molecules, 28(11), 4295.

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Choline Kinase Inhibition in Cancer Cells

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Prostate (PC-3, PC-3-luc, DU145, C42B), breast (MDA-MB-468), ovarian (OVCAR-3), pancreatic (CFPAC), colon (HCT116) cancer cell lines and near-normal prostate RWPE-1 cells were used. PC-3-luc cells were from Perkin Elmer (Waltham, MA) and all other cell lines were from ATCC. Primary antibodies against Cdk4, Cdk2, p-Rb, p21, Bim, Bid, Bcl-2, pBcl-2, cleaved poly(ADP-ribose)polymerase (PARP) and β-actin were from Cell Signaling (Beverly, MA), Ki67, HIF1-α and p53 were from BD Bioscience (San Jose, CA) and Choline kinase was from Proteintech (Rosemont, IL). Bax, GAPDH and HRP-conjugated secondary antibodies were from Santa Cruz (Santa Cruz, CA). Phosphoethanolamine, monoethanolamine, luciferin and Dimethyloxalylglycine, N-(Methoxyoxoacetyl)-glycine methyl ester (DMOG) were from Sigma (St Louis, MO). Choline kinase-α inhibitor was from Calbiochem (San Diego, CA). siRNA against choline kinase was from GE Dharmacon (Lafayette, CO).

Saxena R., Yang C., Rao M., Turaga R.C., Garlapati C., Gundala S.R., Myers K., Ghareeb A., Bhattarai S., Kamilinia G., Bristi S., Su D., Gadda G., Rida P.C., Cantuaria G.H, & Aneja R. (2017). Preclinical development of a non-toxic oral formulation of monoethanolamine, a lipid precursor, for prostate cancer treatment. Clinical cancer research : an official journal of the American Association for Cancer Research, 23(14), 3781-3793.

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Characterization of Biogenic Amines

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All
reagents were obtained
from commercial suppliers and used without further purification. Epinephrine
hydrochloride (EPN·HCl), dopamine hydrochloride (DOP·HCl),
tyramine hydrochloride (TYR·HCl), dimethylsulfoxide (DMSO-d₆, 99.5 atom % D), and monoethanolamine (MEA,
98%, d = 1.012 g·mL^–1) were
purchased from Sigma-Aldrich. 2-Phenylethylamine hydrochloride (PEA·HCl,
99%) and (DMSO, 99.8%) were purchased from Fluka and TEDIA, respectively. l-3,4-dihydroxyphenylalanine (l-DOPA, 98.5%) was purchased
from S D Fine-Chem Ltd. The hydroxide bases NaOH and KOH (as pellets)
were obtained from Gainland Chemical Co. and Net Tech Ltd., respectively.
CO₂ (industrial grade) and N₂ (industrial grade)
were purchased from Advanced Technical Gases Co. (Amman, Jordan).

Assaf K.I., Qaroush A.K., Mustafa F.M., Alsoubani F., Pehl T.M., Troll C., Rieger B, & Eftaiha A.F. (2019). Biomaterials for CO2 Harvesting: From Regulatory Functions to Wet Scrubbing Applications. ACS Omega, 4(7), 11532-11539.

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Liquid Crystalline Pluronic L92 Samples

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Pluronic L92 (poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide) (PE 9200, M_n ≈ 3650 g/mol, 20 wt % PEO) was provided by BASF Corporation (Ludwigshafen, Germany). The composition of Pluronic L92 can be represented as (EO)₈(PO)₄₇(EO)₈ [6 (link),8 (link)]. Monoethanolamine (MEA, ≥99.0%) and barium chloride dehydrate (≥99.0%) were purchased from Sigma Aldrich (Saint Louis, MO, USA). Carbon dioxide (gas, 99.9%) was purchased from AGA, NaOH 0.1 N, HCl 0.1 N, and H₂SO₄ 0.1 N were purchased from Merck KGaA (Darmstadt, Germany). All chemicals were used as received. Milli-Q water was used as solvent (18.2 MΩ cm). Compositions of liquid crystalline samples and MEA solutions are expressed in weight %.

Rodríguez-Fabià S., Norrman J., Knuutila H.K., Sjöblom J, & Paso K. (2019). CO2 in Lyotropic Liquid Crystals: Phase Equilibria Behavior and Rheology. Polymers, 11(2), 309.

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Fabrication of Zirconium-based Charge-trap Layer

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The charge-trap layer (CTL) was prepared by dissolving 40 mg/mL zirconium (IV) acetylacetonate (487.66 g/mol, Sigma-Aldrich) in methanol (32.04 g/mol, Sigma-Aldrich) and adding monoethanolamine (61.08 g/mol, Sigma-Aldrich) as the stabilizer. Silicon wafers were sequentially cleaned in acetone and isopropyl alcohol for 15 min each by ultrasonication and then dried for 30 min. Prior to the spin-coating the ZAA solution, methanol was spin-coated on the substrate and annealed on a hot plate at 65°C for 5 min to enhance coating quality of the ZAA solution. The ZAA solution was spin-coated in ambient conditions at 3000 rpm for 30 s on the methanol-treated substrates, followed by a two-step thermal treatment; all samples were annealed at 65°C for 10 min to evaporate the solvent, and then some were kept in ambient to dry at room temperature while others were annealed at 200°C and 300°C for 60 min in the same ambient condition.

Lee S., Lee J.I., Kim C.H., Kwon J.H., Lee J., Boampong A.A, & Kim M.H. (2023). Solution-processed zirconium acetylacetonate charge-trap layer for multi-bit nonvolatile thin-film memory transistors. Science and Technology of Advanced Materials, 24(1), 2212112.

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Synthesis and Characterization of Novel Organic Compounds

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All chemicals and solvents (methanol, ethanol, toluene, dimethyl sulfoxide) were obtained from commercially available sources and used without further purification. 4,7-Dichloroquine, 97% hydrobromic acid 48%, monoethanolamine, activated charcoal (granulated), diethyl oxalacetate sodium salt 95%, benzaldehyde 98%, hydrazine solution 35 wt.% in H₂O, 4-ethylbenzaldehyde 98%, and isobutyraldehyde 99% were purchased from Sigma-Aldrich, Darmstadt, Germany. Furaldehyde was supplied by Fischer Chemical (Pittsburgh, PA, USA), while 4-hydroxybenzaldehyde was 99% (ACROS Organics, Geel, Belgium). ¹H and ¹³C NMR spectra were recorded on a Joel Resonance ECZ400S 400 MHz spectrometer (Selangor, Malaysia) at 400 MHz and 100 MHz, respectively, using TMS as an internal standard in CDCl₃ d₆-dimethyl sulphoxide (DMSO) solutions. Elemental analyses were performed on a Flash Elemental Analyzer (Selangor, Malaysia) 110 series. The melting point was determined on the melting point apparatus, Stuart SMP40, at room temperature until 400 °C. The progress of the reactions was monitored by thin-layer chromatography (TLC) on silica gel from Merck Kieselgel (New Jersey, NJ, USA) 60F_254, and the product was visualized with an ultraviolet lamp.

Shamsuddin M.A., Ali A.H., Zakaria N.H., Mohammat M.F., Hamzah A.S., Shaameri Z., Lam K.W., Mark-Lee W.F., Agustar H.K., Mohd Abd Razak M.R., Latip J, & Hassan N.I. (2021). Synthesis, Molecular Docking, and Antimalarial Activity of Hybrid 4-Aminoquinoline-pyrano[2,3-c]pyrazole Derivatives. Pharmaceuticals, 14(11), 1174.

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Fabrication of Polymeric Biosensing Surfaces

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Poly(methyl methacrylate), PMMA, was purchased from Goodfellow (Berwyn, PA). Cyclic olefin copolymer (COC 8007 and 6017) were purchased from TOPAS Advanced Polymers (Florence, KY). Si ⟨100⟩ wafers were acquired from University Wafers (Boston, MA). Ethylenediamine (EDA), sodium dodecyl sulfate (SDS), dextrose, glucose oxidase (Aspergillus niger), Dulbecco’s phosphate buffered saline (1× DPBS, pH 7.4), catalase (bovine liver), monoethanolamine (MEA, pH 8.0–8.5), sodium bicarbonate buffer (pH 7.5), tripropylene glycol diacrylate (TPGA), trimethylolpropane triacrylate (TMPA), Irgacure 651 (photoinitiator), and potassium chloride (KCl) were purchased from Sigma-Aldrich (St. Louis, MO) and used as received. Alexa Fluor 647 NHS ester and 20 nm Nile red (535/575) carboxylate modified polystyrene spheres were secured from Life Technologies (Grand Island, NY). Antiadhesion (tridecafluoro-1,1,2,2-tetrahydrooctyl) tricholorosilane (T-Silane) was purchased from Gelest, Inc. (Morrisville, PA). Tris buffer (pH 8.0) was obtained from Fisher Scientific (Houston, TX). All dilutions were performed using 18 MΩ/cm Milli-Q water (EMD Millipore, Billerica, MA), with all measurements carried out at 25 °C.

ONeil C.E., Jackson J.M., Shim S.H, & Soper S.A. (2016). Interrogating Surface Functional Group Heterogeneity of Activated Thermoplastics Using Super-Resolution Fluorescence Microscopy. Analytical chemistry, 88(7), 3686-3696.

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Synthesis of Lead Halide Perovskite Nanocrystals

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Lead oxide (PbO), OA, 1‐octadecene (ODE), hexamethyldisilathiane (TMS), lead iodine (PbI₂), lead bromide (PbBr₂), potassium iodide (KI), iodine molecule (I₂), ammonium acetate (NH₄Ac), N,N‐DMF, 2‐methoxyethanol, monoethanolamine (MEA), zinc acetate dihydrate, and magnesium acetate tetrahydrate were purchased from the Sigma.

Hu L., Lei Q., Guan X., Patterson R., Yuan J., Lin C., Kim J., Geng X., Younis A., Wu X., Liu X., Wan T., Chu D., Wu T, & Huang S. (2020). Optimizing Surface Chemistry of PbS Colloidal Quantum Dot for Highly Efficient and Stable Solar Cells via Chemical Binding. Advanced Science, 8(2), 2003138.

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Pluronic Block Copolymer Synthesis

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Pluronic L92 (poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide)) (PE 9200, M_n ≈ 3650 g/mol, 20 wt % PEO) was provided by BASF Corporation (Ludwigshafen, Germany). Pluronic L81 (PE 8100, M_n ≈ 2800 g/mol, 10 wt % PEO) was purchased from Sigma Aldrich (Saint Louis, MO, USA). The average composition of Pluronic L92 and Pluronic L81 can be represented as (EO)₈(PO)₄₇(EO)₈ and (EO)₃(PO)₅₀(EO)₃, respectively [22 (link),29 (link)]. Monoethanolamine (MEA, ≥99.0%) was purchased from Sigma Aldrich. Carbon dioxide (99.7%) was purchased from AGA AB (Stockholm, Sweden). All chemicals were used as received. Milli-Q water was used as solvent (18.2 MΩ cm).

Rodríguez-Fabià S., Norrman J., Sjöblom J, & Paso K. (2018). CO2 in Lyotropic Liquid Crystals: Monoethanolamine-Facilitated Uptake and Swelling. Polymers, 10(8), 883.

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