The printable precursor is prepared by mixing a 15 v% of Poly (ethylene glycol) diacrylate (PEGDA, Mn700, Sigma-Aldrich), 0.5 wt% photo-initiator (Lithium phenyl-2,4,6-trimethylbenzoylphosphinate, purity ≥ 95%, Sigma-Aldrich), 0.05 wt% photo-absorber (Quinoline yellow, purity≥ 95%, Sigma-Aldrich), and ball-milled porous silivoxels. The photo-initiator and photo-absorber are used as purchased. Then a custom-built SLA printer with a bottom-up configuration is used to print the high-precise architectures. The light source of the projector is 385 nm ultraviolet (UV) light, with a 1080 P projector (Wintech PRO4500, Texas Instrument). The Eiffel tower CAD (Computer-aided design) model is sliced to mask images using a custom-programmed slicing software with a layer-thickness of 50 µm. A custom-programmed control software synchronizes the mask image projection and the build-platform motion. The printed parts are dried in a humidity-controlled environment at 80 °C for 12 h.
Quinoline yellow
Manufactured by Merck Group
Sourced in United States, India, Switzerland
Quinoline yellow is a yellow dye used as a colorant in various laboratory equipment and supplies. It is a water-soluble organic compound that is commonly used to stain and visualize biological samples in microscopy and other laboratory applications.
Automatically generated - may contain errors
Lab products found in correlation
Tartrazine, by Merck Group (4 mentions)
Sunset yellow, by Merck Group (2 mentions)
Allura red, by Merck Group (2 mentions)
Lithium phenyl 2 4 6 trimethylbenzoylphosphinate, by Merck Group (1 mentions)
Pgp glo assay system, by Promega (1 mentions)
Rhodamine 123 r123, by Merck Group (1 mentions)
Verapamil, by Promega (1 mentions)
Ponceau 4r, by Merck Group (1 mentions)
Hydrochloric acid (hcl), by Merck Group (1 mentions)
Propylene glycol, by Merck Group (1 mentions)
Milli q water, by Merck Group (1 mentions)
Saccharin, by Merck Group (1 mentions)
Disodium hydrogen phosphate dodecahydrate, by Sinopharm (1 mentions)
Amaranth, by Merck Group (1 mentions)
Brilliant blue g, by Merck Group (1 mentions)
Sucrose, by Merck Group (1 mentions)
Sodium citrate, by Merck Group (1 mentions)
Vitamin c, by Merck Group (1 mentions)
Sodium dihydrogen phosphate dihydrate, by Sinopharm (1 mentions)
Quinine sulfate, by Merck Group (1 mentions)
8 protocols using quinoline yellow
1
Precise 3D Printing of Porous Silica Microstructures
2
Pgp-Glo Assay for Transporter Inhibition
3
Quinoline Yellow Characterization Protocol
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All chemicals used were of analytical grade and were utilized without further purification. Quinoline yellow was purchased from Sigma Aldrich (Sigma Aldrich, St. Louis, MO, USA). A stock solution used for measurements with a concentration of 0.01 mol L−1 was prepared by dilution in double distilled water, while lower concentrations were prepared daily. Hydrochloric acid was purchased from Merck, (Darmstadt, Germany), and Triton X-100 from Windsor Laboratories Ltd., UK (Kingston, Jamaica). All aqueous solutions were prepared using double distilled water. Borosilicate glass utilized during experiments was cleaned using HNO3 and double distilled water.
4
Warfarin-Loaded Orodispersible Films and Oral Powders
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The anticoagulant warfarin was the drug investigated in the present study. Warfarin sodium (WS) loaded into the orodispersible films (ODFs) was acquired from Sigma-Aldrich (St. Louis, MO, USA), and the WS present in the compounded oral powders in unit dose sachets (OPSs) was obtained from commercial Marevan forte 5 mg tablets (Orion Pharma, Espoo, Finland). Lactose monohydrate (parve granules, Oriola, Espoo, Finland) was used as a filler in the OPS together with the ground tablets. Hydroxypropylcellulose (HPC, Klucel™ EXF, MW 80,000), which was used as a film-forming agent for both the EXT and IJP ODFs, was kindly donated by Ashland (Schaffhausen, Switzerland). Quinoline yellow (Sigma-Aldrich, Bangalore, India) and propylene glycol (PG) ≥ 99.5% (Sigma-Aldrich, St. Louis, MO, USA) were added to the IJP ink due to their respective properties as a colorant and viscosity/surface tension modifier. Ethanol ≥ 94% (Etax A, Altia, Helsinki, Finland) and purified water (Milli-Q water, Millipore SA-67120, Millipore, Molsheim, France) were used for analytics and as solvents in the polymer and ink solutions.
5
Colorimetric Assay for Food Additives
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Boric acid (H3BO3), aniline, ammonium persulfate (APS), and copper nitrate
trihydrate (Cu(NO3)2·3H2O) were
purchased from Shanghai Aladdin Bio-Chem Technology Co., Ltd. The
aniline monomer purchased from E. Merck was purified by vacuum distillation
before polymerization. SY, tartrazine, amaranth, brilliant blue G,
quinoline yellow, sucrose, saccharin, glucose, vitamin C, oxalate,
and sodium citrate were purchased from Sigma-Aldrich Co., Ltd. Phosphate
buffer solution (PBS) was obtained via mixing different amounts of
equimolar aqueous solutions of disodium hydrogen phosphate dodecahydrate
(Na2HPO4) and sodium dihydrogen phosphate dihydrate
(NaH2PO4), which were purchased from Sinopharm
Chemical Reagent Co., Ltd. Fanta drinks were obtained from the local
supermarket. All reagents were of analytical grade and could be used
without further purification. High purity water (18 MΩ cm) was
used to prepare all aqueous solutions throughout our study.
trihydrate (Cu(NO3)2·3H2O) were
purchased from Shanghai Aladdin Bio-Chem Technology Co., Ltd. The
aniline monomer purchased from E. Merck was purified by vacuum distillation
before polymerization. SY, tartrazine, amaranth, brilliant blue G,
quinoline yellow, sucrose, saccharin, glucose, vitamin C, oxalate,
and sodium citrate were purchased from Sigma-Aldrich Co., Ltd. Phosphate
buffer solution (PBS) was obtained via mixing different amounts of
equimolar aqueous solutions of disodium hydrogen phosphate dodecahydrate
(Na2HPO4) and sodium dihydrogen phosphate dihydrate
(NaH2PO4), which were purchased from Sinopharm
Chemical Reagent Co., Ltd. Fanta drinks were obtained from the local
supermarket. All reagents were of analytical grade and could be used
without further purification. High purity water (18 MΩ cm) was
used to prepare all aqueous solutions throughout our study.
6
Fluorescent Compound Preparation Protocol
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Urea and TEG, purchased from Merck (Darmstadt, Germany), were used to prepare the CDs. Quinine sulfate (Sigma-Aldrich, St. Louis, MO, USA) was used as the fluorescence standard compound. Sunset yellow, allura red, quinoline yellow, and tartrazine were all purchased from Sigma-Aldrich. The stock solutions of tartrazine and allura red were prepared in water. Ethanol was used to prepare the stock solutions of Sunset yellow and quinoline yellow. The working solutions were prepared by an appropriate dilution of the stock solution (1000 μM).
7
3D Hydrogel Chip Fabrication
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3D hydrogel chips were designed using CAD software (Inventor Professional 2019, Autodesk, USA). The 3D stereolithographic hydrogel printing method, cytotoxicity assessment and perfusion setup have been described in our previous work. 4 The pre-polymer solution was adapted and consisted of 200 mg/mL poly(ethylene glycol) diacrylate (PEGDA; M n 700 g/mol; Sigma-Aldrich), 11.25 mg/mL quinoline yellow (Sigma-Aldrich), 5 mg/mL lithium phenyl-2,4,6-trimethylbenzoylphosphinate (LAP, Sigma-Aldrich) in water and optimized exposure settings of 4.5 s per printed layer with a step height of 20 µm.
8
Retinoids and Amphiphilic Copolymer Synthesis
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All-trans retinoic acid (Ph. Eur.; ≥98% purity) and bovine serum albumin (BSA) were purchased from Axon-Lab (Baden-Dättwil, Switzerland). The amphiphilic MPEG-dihexPLA copolymer (methoxy-poly(ethylene glycol) di-(hexyl-substituted polylactide)) was synthesized in-house as described previously. 22, 23 The MPEG-dihexPLA copolymer had a M n of 6080 g mol -1 and a polydispersity index (P.I.) of 1.15 according to GPC measurements. The internal standard acitretin (ACT), 9-cis retinoic acid, 13-cis retinoic acid, tartrazine, Quinoline Yellow, Acid Yellow 17, sodium and potassium chloride, sodium and potassium phosphate, trifluoroacetic acid, phosphoric acid and triethylamine were purchased from Sigma Aldrich (Buchs, Switzerland). Acetone and acetonitrile (HPLC grade) were supplied by Biosolve chemicals (Valkenswaar, Netherlands). Ultra-pure water (Millipore Milli-Q ® Gard 1 Purification Pack resistivity >18 MΩ cm, Zug, Switzerland) was used. All other chemicals were at least of analytical grade.
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