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2 2 azinobis 3 ethylbenzthiazoline 6 sulphonate

Manufactured by Merck Group
Sourced in United States

2,2'-Azinobis-(3-ethylbenzthiazoline-6-sulphonate) is a chemical compound used in various analytical and diagnostic applications. It functions as a redox indicator, undergoing color changes in response to oxidation and reduction reactions. This compound is commonly employed in assays and colorimetric analyses.

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6 protocols using 2 2 azinobis 3 ethylbenzthiazoline 6 sulphonate

1

Antioxidant Potential of Black Carrots

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Black carrots “Purple 68” were purchased from TMALL. Gallic acid (GA), catechol (CA), cyanoside-3-glycoside (C3G), 6-hydroxy-2,5,7,8-tetramethylchromane-2-carboxylic acid (Trolox), Folin Ciocalteu, 1,1-diphenyl-2-picrylhydrazyl (DPPH), 2,6-dichloroindophenol,2,4,6-tripyridyl-s-triazine (TPTZ), and 2,2'-Azinobis-(3-ethylbenzthiazoline-6-sulphonate) (ABTS) were purchased from Sigma-Aldrich (St. Louis, MO, USA). Other reagents were purchased from Aladdin (Shanghai, China).
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2

Phytochemical Extraction and Antioxidant Assays

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Most of the chemicals used for extraction and characterization were analytical grade and purchased from Sigma-Aldrich (Castle Hill, NSW, Australia). The standards for antioxidant assays included gallic acid, quercetin, catechin and L-ascorbic acid, which were purchased from Sigma-Aldrich (St. Louis, MO, USA). For antioxidant assays, Folin and Ciocalteu’s phenol, aluminium chloride hexahydrate, vanillin, 2,2-diphenyl-1-picrylhydrazyl (DPPH), ferric (III) chloride anhydrous, 2,4,6-tripyridyl-s-triazine (TPTZ), potassium persulfate and 2,2′-azino-bis(3-ethylbenz-thiazoline-6-sulphonate) (ABTS) were purchased from Sigma-Aldrich (St. Louis, MO, USA) and sodium carbonate anhydrous (chem-supply; Gillman, SA, Australia), sodium acetate hydrated (Ajax Finechem, Scoreby, VIC, Australia) and sulfuric acid 98% were purchased from RCI Labscan Limited, (Bangkok, Thailand). The HPLC grade methanol was purchased from Fisher Chemical Company (San Jose, CA, USA). The mobile phases for LC-ESI-QTOF/MS and HPLC were mainly comprised of 50% acetic acid solution (Sigma-Aldrich, St. Louis, MO, USA) and acetonitrile (LiChrosolv, Darmstadt, Germany). The reference standards including protocatechuic acid, catechin, 4-hydroxybenzoic acid, chlorogenic acid, quercetin 3-O-glucoside, kaempferol 3-O-glucoside and quercetin were purchased from Sigma-Aldrich (St. Louis, MO, USA).
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3

Enzymatic Valorization of Schizochytrium Byproduct

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Schizochytrium processing byproduct was kindly provided by Fisheries Research Institute of Fujian, China, and was stored at −20 °C before use. The commercial protease, alcalase (EC. 3.4.21.62, 2.2 × 105 U/g) and flavourzyme (EC. 3.4.11.1, 7.8 × 104 U/g) were purchased from Novozymes (Copenhagen, Denmark). 2,2′-azinobis-3-ethylbenzthiazoline-6-sulphonate (ABTS), 1,1-diphenyl-2-picrylhydrazyl (DPPH) were obtained from Sigma Chemical Co. (St. Louis, MO, USA). All the kits for biochemical analyses used in the animal experiment were the products of Nanjing Jiancheng Bioengineering Institute (Nanjing, China). All other chemicals and reagents were of analytical grade and commercially available.
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4

Phage Display Assay for 6'-SL Mimic

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To confirm that the obtained phages express a peptide mimicking 6′-SL, wells were pre-coated overnight at 4°C with 100 μL of 100 μg/mL Sambucus nigra lectin or NaHCO3 as vehicle control. After blocking with 100 μL of 1% bovine serum albumin in PBS for 1 hour at room temperature, the wells were incubated with 1 × 1010 purified phages in PBS for 2 hours at room temperature, with PBS as vehicle control. Wells were washed 6 times with Tris-buffered saline containing 0.1% Tween-20 before incubation with 100 μL of horseradish peroxidase-conjugated M13 antibodies (Cat# 27-9421-01, GE Healthcare, Piscataway, NJ, USA) in blocking solution for 1 hour at room temperature. The wells were then washed 6 times with Tris-buffered saline containing 0.03% Tween 20, and with 100 μL of 2,2′-azinobis-(3-et hylbenzthiazoline-6-sulphonate) (Cat# 30931-67-0, Sigma-Aldrich) finally. Absorbance was determined at 415 nm in a microtiter plate reader (Tecan Infinite® M1000 Pro, Tecan, Switzerland).
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5

Phloridzin-Based Antioxidant Evaluation

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Phloridzin (PZ), myristic acid, 3 Å molecular sieves, 2,4,6-tris(2-pyridyl)-S-triazine (TPTZ) and 2,2-diphenyl-1-picrylhydrazyl (DPPH) were purchased from Aladdin (Shanghai, China) while the immobilized lipase B enzyme Novozyme 435® (from Candida antarctica and 10,000 propyl laurate unit activity) was obtained from Novo Industry A/S. Tween-80 and 2,2′-Azinobis-(3-ethylbenzthiazoline-6-sulphonate) (ABTS) were purchased from sigma, with phosphorus (V) oxide (P2O5), p-anisaldehyde, acetone, acetic acid, ethanol anhydrous, sodium acetate trihydrate, ferric chloride, vitamin C and carbon tetrachloride (CCl4) were obtained from Kemiou Chemical Reagent Co., Ltd (Tianjin, China) while olive oil was obtained from a local Pharmacy (Beijing, China). Silymarin was supplied by Madaus AG (Germany).
Aspartate aminotransferase (AST), alanine aminotransferase (ALT), superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GSH-Px), glutathione (GSH), malondialdehyde (MDA) and interleukin-6 (IL-6) detection kits were purchased from Nanjing Jiancheng Institute of Biotechnology (Nanjing, China). Enhanced Bicinchoninic Acid (BCA) Protein Assay Kit was obtained from Beijing Kangwei Institute of Biotechnology (Beijing, China).
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6

Immobilized Enzyme Assay Development

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Candida antarctica lipase B (CALB, EC.3.1.1.3, recombinant expressed in Aspergillus Niger), Glucose Oxidase from Aspergillus Niger (GOD, EC.1.1.3.4), Peroxidase from horseradish (HRP, EC.1.11.1.7), Poly(allylamine hydrochloride) (PAH, MW: ~200 kDa), p-Nitrophenol, 2,2′-Azinobis-(3-ethylbenzthiazoline-6-sulphonate) (ABTS), Fluorescamine, were purchased from Sigma-Aldrich chemical. Sulforhodamine 101 and FITC were purchased from Aladdin. d-glucose anhydrous, hexadecyl trimethyl ammonium bromide (CTAB), N, N-Dimethylacetylamide (DMAc), glycerol were purchased from Beijing Chemical Factory, 1-Oxododecyla-α-glucopyranoside was purchased from Beijing Saenke Biotechnology Company, Hydrogen peroxide was purchased from Beijing Xinjingke Biotechnology Company, Polyurethane A85E pellets with a bulk density of approximately 700 kg/m3 was supplied by Xiamen Jinyouju Chemical Agent (Xiamen China).
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