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16 protocols using 200 proof ethanol

1

Cleaning and Preparing Glass Slides for Thin-Film Deposition

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A No. 1.5H ibidi glass coverslip (25 × 75 mm) (ibidi #10812) was cleaned by sonication in DI water for five minutes. The sample was then subjected to a second sonication in fresh DI water for five minutes. Finally, the slide was sonicated in 200 proof ethanol (Fischer Scientific #04-355-223) for five minutes and was subsequently dried under a stream of N2. The cleaned glass coverslip was then mounted into a home-built thermal evaporator chamber in which the pressure was reduced to 50 × 10−3 Torr. The chamber was purged with N2 three times and the pressure was reduced to 1–2 × 10−7 Torr by using a turbo pump with a liquid N2 trap. Once the desired pressure was achieved, a 3 nm film of Cr was deposited onto the slide at a rate of 0.2 Å s−1, which was determined by a quartz-crystal microbalance. After the Cr adhesive layer had been deposited, 6 nm of Au was deposited at a rate of 0.4 Å s−1. The Au-coated samples were used within one week of deposition.
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2

Electrochemical Biosensor for SARS-CoV-2 Detection

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Graphite flakes, ethyl cellulose (4x10−3 Pa/s), terpineol, N-(3-dimethylaminopropyl)-N’-ethylcarbodiimide (EDC), N-hydroxysuccinimide (NHS), ethanolamine, 2-(N-morpholino) ethanesulfonic acid (MES buffer), potassium hexacyanoferrate (II) trihydrate, and potassium ferricyanide, were purchased from MilliporeSigma (Saint Louis, MO, USA). Potassium chloride was purchased from Fisher Scientific (Hampton, NH, USA). Superblock™ buffer and 200-proof ethanol were purchased from Thermo Fisher (Waltham, MA, USA). Artificial saliva was purchased from Pickering Laboratories (Mountain View, CA, USA). Phosphate buffer saline was purchased from Alfa Aesar (Tewksbury, MA, USA). SARS-CoV-2 Spike Rabbit polyclonal antibody (Cat. # 40591-T62), SARS-CoV-2 Spike RBD protein (Cat. # 40592-V08H), SARS-CoV-2 Spike S1 protein (Cat. # 40591-V08H), Middle East respiratory syndrome (MERS) Spike S1 protein (Cat. # 40069-V08H), and Influenza H1N1 hemagglutinin (HA) protein (Cat. #40006-V08H) were purchased from Sino Biological (Sino Biological US Inc., Wayne, PA, USA).
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3

Cell Culture and Molecular Techniques

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DMEM media, RPMI media, trypsin, fetal bovine serum (FBS), penicillin/streptomycin (P/S), L-glutamine, TRIzol, MTT reagent, and green SYBR reagent were obtained from Invitrogen (Carlsbad, CA, USA). Recombinant mouse interferon-γ (IFNγ) was obtained from R&D Systems (Minneapolis, MN, USA). Chloroform, isopropanol, DEPC water, and 200 proof ethanol were obtained from ThermoFisher (Waltham, MA, USA). Normal saline and phosphate buffered saline (PBS) were obtained from Corning Inc. (Corning, NY, USA). Sucrose and formalin solution were obtained from Sigma Aldrich (St. Louis, MO, USA).
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4

Glass Coverslip Preparation for Metal Deposition

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A No. 1.5H ibidi glass coverslip (25 × 75 mm) (ibidi #10812) was cleaned by sonication in DI water for five minutes. The sample was then subjected to a second sonication in fresh DI water for five minutes. Finally, the slide was sonicated in 200 proof ethanol (Fischer Scientific #04-355-223) for five minutes and was subsequently dried under a stream of N2. The cleaned glass coverslip was then mounted into a home-built thermal evaporator chamber in which the pressure was reduced to 50 × 10−3 Torr. The chamber was purged with N2 three times, and the pressure was reduced to 1–2 × 10−7 Torr by using a turbo pump with a liquid N2 trap. Once the desired pressure was achieved, a 3 nm film of Cr was deposited onto the slide at a rate of 0.2 Å s−1, which was determined by a quartz-crystal microbalance. After the Cr adhesive layer had been deposited, 6 nm of Au was deposited at a rate of 0.4 Å s−1. The Au-coated samples were used within one week of deposition.
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5

Mass Spectrometry Sample Preparation

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Acetonitrile, α-Cyano-4-hydroxycinnamic acid (CHCA), trifluoroacetic acid (TFA), ammonium bicarbonate, ammonium phosphate monobasic, calcium chloride, and Trizma® base were purchased from Sigma-Aldrich (St. Louis, MO, USA). Collagenase type III (COLase3) (C. histolyticum) was purchased from Worthington (Lakewood, NJ, USA). Xylenes, 200 proof ethanol, methanol, HPLC grade water were purchased from Fisher Scientific (Pittsburgh, PA, USA).
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6

Tissue Dissociation and Extraction Protocol

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Acetonitrile, α-Cyano-4-hydroxycinnamic acid (CHCA), trifluoracetic acid (TFA), sodium citrate, and trizma base were purchased from Sigma-Aldrich (St. Louis, MO, USA). Collagenase type III (COLase3) (C. histolyticum) and IV and elastase (MMP12; porcine) were purchased from Worthington Biochemicals (Lakewood, NJ), StemCell Technologies (Cambridge, MA), Thermo Scientific (Waltham, MA), Alfa Aesar (MMP12, Fisher Scientific, Pittsburgh, PA) or Abnova (Taipei City, Taiwan). Xylenes, 200 proof ethanol, methanol, citraconic anhydride were purchased from Fisher Scientific (Pittsburgh, PA).
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7

Synthesis of Osmium Complexes

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OsCl3·3H2O (99.95%) was purchased from Strem Chemicals. Dimethylformamide (DMF; 99.9%) and 200- proof ethanol was obtained from Fisher Scientific. 1H NMR solvents CDCl3, D2O and Acetone-d6 (99.9%) were obtained from Cambridge Isotope Lab Inc. The following chemicals were obtained from Sigma Aldrich: (NH4)2OsCl6 (99.99%), 2,2’-bipyridine (reagent plus ⩾99%), ethylene glycol (99.9%), anhydrous diethyl ether (99.9%), hydrochloric acid (HCl; 37% w/v), 1—vinylimidazole (⩾99.9%), allylamine (AA, 98%), sodium dithionite (technical grade) and azobisisobutyronitrile (AIBN; 99%).
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8

Collagenase-Based Tissue Dissociation

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Collagenase type III (COLase3) (Clostridium histolyticum) was obtained from Worthington (Lakewood, NJ, USA). PNGaseF PRIME™ was obtained from N-Zyme Scientific (Doylestown, PA, USA). Sigma Aldrich (St. Louis, MO, USA) was the source used for acetonitrile, α-cyano-4-hydroxycinnamic acid (CHCA), trifluoroacetic acid (TFA), ammonium bicarbonate, ammonium phosphate monobasic, and calcium chloride. Dewaxing (xylenes, 200-proof ethanol, methanol) solvents and high-performance liquid chromatography (HPLC)-grade water were purchased from Fisher Scientific (Pittsburgh, PA, USA).
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9

Stimulating E-selectin in HUVECs

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Human umbilical vein endothelial cells (HUVECs) were maintained as previously described.21 (link) Spironolactone (Sigma) in dimethylsulfoxide (Sigma) and estrogen (Sigma) in 200-proof ethanol (Fisher) were diluted to 1μM and 10nM, respectively, in M199 media (Gibco) for application to cells. For stimulation of E-selectin, cells were pretreated with Spironolactone, estrogen, or appropriate vehicle(s) for 1 hour and then stimulated with low-dose TNFα (80pg/mL, Biolegend) for 20 hours. Otherwise, Spironolactone and estrogen were applied to cells for 20 hours. All samples contained the same concentration of DMSO and/or ethanol. Leukocyte adhesion and luciferase assays were performed as previously described.12 (link),21 (link) Each cell treatment was carried out in triplicate, and each experiment was performed a minimum of three times.
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10

Ethanol Sedation Assay for Drosophila

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A modified ethanol sedation assay from Maples and Rothenfluh was followed as previously reported [22 (link),23 (link)]. Male or female flies (8–10) were sedated using CO2 and sorted into empty vials. Flies were allowed to recover from the effects of CO2 anesthesia for 0.5–8 h before sedation assay. To determine time of sedation, the cotton plug of each vial was replaced with a new plug soaked with 500 μL of the appropriate dose (25%, 50%, 75%, and 100% v/v) of 200-proof ethanol (Fisher Scientific). After one minute, each vial was tapped once on the table to relocate the flies to the bottom of the vial. After ten seconds, the number of flies exhibiting loss-of-righting reflex were recorded. This procedure was repeated after every minute of ethanol exposure for each vial until at least half of the flies in the vial were sedated. Loss of righting reflex includes flies on their backs, stationary flies, stationary flies with rapid wing movement, and spinning in one location. The number of minutes it took for half the flies in the vial to sedate was recorded for each vial as the median sedation time (ST50). Linear interpolation was used to determine ST50 when there was an odd number of flies in the trial or when 50% sedation was reached in between intervals.
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