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F 500

F 500: The Fortune 500 list, an annual ranking of the 500 largest U.S. public companies by total revenue.
These major corporations across diverse industries play a pivotal role in the American economy.
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Most cited protocols related to «F 500»

GM12878 cells were counted five times using a manual hemocytometer. The
mean cell count was used to resuspend the cells to a concentration of 500 cells
per 100 μl by the addition of PBS. From this diluted cell mixture, 100
μl (500 cells) were deposited into a 0.5-ml DNA LoBind tube (Eppendorf
#022431005) containing 400 μl of cold ATAC-seq RSB. This was
done to simulate a work-flow involving FACS sorting. These tubes were
centrifuged at 500 r.c.f. for 10 min in a pre-chilled (4 °C) fixed-angle
centrifuge with 0.6-ml tube adapters. All of the supernatant was removed using
the two pipetting steps described above, first by removing 400 μl with a
P1000 pipette tip followed by removal of the remaining volume with a P200
pipette tip. We note that a gradual but constant removal of supernatant is
crucial and that the final supernatant removal step should be completed in a
single motion to avoid disrupting the cell pellet. After supernatant removal,
lysis and transposition were performed simultaneously to avoid cell loss, and
the total reaction volume was reduced for the same reason. As such, 10
μl of transposition mix (3.3 μl PBS, 1.15 μl water, 5
μl 2× TD Buffer, 0.25 μl 1:10 diluted Tn5
enzyme26 (link), 0.1
μl 1% digitonin, 0.1 μl 10% Tween-20, and 0.1
μl 10% NP40) was added directly to the invisible cell pellet,
and the pellet was resuspended by pipetting up and down six times. The
transposition reaction was incubated at 37 °C for 30 min in a
thermomixer with shaking at 1,000 r.p.m. Note that Tn5 should be diluted in
1× TD Buffer (for example, 5 μl 2× TD Buffer, 4
μl of water, 1 μl Tn5).
Publication 2017
ATAC-Seq Buffers Cells Cold Temperature Digitonin F 500 Tween 20
AAVs were generated in HEK 293T cells (ATCC) using Polyethylenimine (PEI)61 (link). 72 hours post transfection, viral particles were harvested from the media and after 120 hours from cells and the media. Viral particles from the media were precipitated with 40% polyethylene glycol (Sigma, 89510-1KG-F) in 500 mM NaCl and combined with cell pellets for processing. The cell pellets were suspended in 500 mM NaCl, 40 mM Tris, 2.5 mM MgCl2, pH 8, and 100 U/mL of salt-activate nuclease (Arcticzymes) at 37°C for 30 minutes. Afterwards, the cells were clarified by centrifugation at 2,000 × g and then purified over iodixanol (Optiprep, Sigma; D1556) step gradients (15%, 25%, 40%, and 60%)62 (link). Viruses were concentrated using Amicon filters (EMD, UFC910024), and formulated in sterile phosphate buffer saline (PBS). Virus titers were measured by determining the number of DNAse I-resistant vg using qPCR using a linearized genome plasmid as a standard61 (link).
Publication 2017
Buffers Cells Centrifugation Deoxyribonuclease I F 500 Genome HEK293 Cells iodixanol Magnesium Chloride Pellets, Drug Phosphates Plasmids Polyethylene Glycols Polyethyleneimine Saline Solution Sodium Chloride Sterility, Reproductive Transfection Tromethamine Virion Virus
AAVs were generated in HEK 293T cells (ATCC) using Polyethylenimine (PEI)61 (link). 72 hours post transfection, viral particles were harvested from the media and after 120 hours from cells and the media. Viral particles from the media were precipitated with 40% polyethylene glycol (Sigma, 89510-1KG-F) in 500 mM NaCl and combined with cell pellets for processing. The cell pellets were suspended in 500 mM NaCl, 40 mM Tris, 2.5 mM MgCl2, pH 8, and 100 U/mL of salt-activate nuclease (Arcticzymes) at 37°C for 30 minutes. Afterwards, the cells were clarified by centrifugation at 2,000 × g and then purified over iodixanol (Optiprep, Sigma; D1556) step gradients (15%, 25%, 40%, and 60%)62 (link). Viruses were concentrated using Amicon filters (EMD, UFC910024), and formulated in sterile phosphate buffer saline (PBS). Virus titers were measured by determining the number of DNAse I-resistant vg using qPCR using a linearized genome plasmid as a standard61 (link).
Publication 2017
Buffers Cells Centrifugation Deoxyribonuclease I F 500 Genome HEK293 Cells iodixanol Magnesium Chloride Pellets, Drug Phosphates Plasmids Polyethylene Glycols Polyethyleneimine Saline Solution Sodium Chloride Sterility, Reproductive Transfection Tromethamine Virion Virus
Aligned digestion spots were chosen on six serial sections of both fresh frozen and fixed mouse liver and mouse caudate putamen slides (each 10 μm thick). First, five cycles of hyaluronidase enzyme solution (0.16 TRU/μL hyaluronidase in the presence of 2 M ammonium acetate and 10% glycerol) was applied on the chosen spots. The resulting HA disaccharides were extracted four times by 0.3% ammonium hydroxide solution and the slides were dried at 55 °C for 5 min, which was followed by 20 min incubation at 37 °C with 50 mM ammonium bicarbonate. Next, five cycles of chondroitinase ABC (1 milliunits/μL) enzyme solution was added. To minimize the amount of salt in the enzyme solution, the 5 mM Tris buffer was replaced by 25 mM ammonium bicarbonate buffer and 10% glycerol was also added to minimize diffusion. The resulting CS disaccharides were extracted as the HA disaccharides and the slide was dried at 55 °C for 5 min, which was followed by 20 min incubation with 25 mM ammonium bicarbonate at 37 °C. Next, five cycles of heparin lyase I, II and III mixture was added. The solution contained 1.66 mU/μL of heparin lyase I, 0.33 mU/μL of herparin lyase II and 0.33 mU/μL of heparin lyase III in the presence of 2.5 mM calcium hydroxide, 12.5 mM ammonium bicarbonate and 10% glycerol. The resulting HS disaccharides were extracted as the HA and CS disaccharides and the slide was dried at 55 °C for 5 min, which was followed by 20 min incubation with 50 mM ammonium bicarbonate at 37 °C. Next, a solution containing 10 mM DTT, 0.1% RapiGest and 10% glycerol was applied on the chosen spots and the tissue slide was incubated at 55 °C for 20 min. This was followed by addition of a solution containing 20 mM iodoacetamide, 25 mM ammonium bicarbonate and 10% glycerol and the tissue slide was placed in a darkbox for 20 min at room temperature. Next, five cycles of trypsin enzyme solution (100 ng/μL) in the presence of 10% glycerol were added to achieve digestion of proteins. Samples were then incubated with aprotinin (2 μg/μL) at 37 °C for 45 min to stop trypsin activity. Finally, five cycles of PNGase F (500,000 units/mL) were added. The peptides and glycans were extracted by 10% acetic acid and separated by C18 spin column. Samples were loaded in 5% ACN/0.1%FA, the flow-through and wash fraction contained the N-glycans, while peptides were released first by 40% ACN 0.1% FA then by 60% ACN 0.1% FA, combined and dried under vacuum. Individual cycles consisted of microwave irradiation for 10 min (for CS, HS and proteins, 270 W; for HA, 540 W) except for N-glycans where incubation took place in an incubator (37 °C, 40 min/cycle). Subsequent LC-MS methods and data interpretation can be found in the Supporting Information along with a table summarizing the experiments performed (Table S-1, Supporting Information).
Publication 2014
Acetic Acid ammonium acetate ammonium bicarbonate Ammonium Hydroxide Aprotinin Buffers Chondroitin ABC Lyase Diffusion Digestion Disaccharides Enzymes Exanthema F 500 Frozen Sections Glycerin Glycopeptidase F heparinase III Heparin Lyase Hyaluronidase Hydroxide, Calcium Iodoacetamide Liver Lyase Mice, House Microwaves Neostriatum Peptides Polysaccharides Protein Digestion Proteins Sodium Chloride Tissues Tromethamine Trypsin Vacuum
MD simulations of Rec and NCS1 states were performed using GROMACS 2016.1 simulation package (Abraham et al., 2015 (link)) and CHARMM36m (Huang et al., 2017 (link)) all-atom force field, where parameters for N-myristoylated Gly were generated manually (available upon request). Simulations were performed in a dodecahedral box with Periodic Boundary Conditions applied, where proteins were located at 12 Å distance from box boundaries. Solvent was modeled as TIP3P water, system was neutralized first with 1 mM MgCl2, then after addition of 150 mM KCl. The size for each simulated system was the following: 33,837 atoms for Rec-T, 38,878 atoms for Rec-I, 56,010 atoms for Rec-R, 86,456 atoms for Rec-GRK1, 46,809 atoms for NCS1-iso, 42,882 atoms for NCS1- D2R and 50,584 atoms for NCS1-GRK1.
All structures underwent substantially the same pre-production steps as previous studies concerning GCAP1 (Marino et al., 2015b (link)), briefly consisting of steepest descent (F = 1,000 kJ/mol*nm) and conjugate gradients (F = 500 kJ/mol*nm) energy minimization, then equilibration at 310 K for 2 ns backbone-constrained and 2 ns unrestricted MD simulations in NVT ensemble. After equilibration, 200 ns unrestrained MD simulations were performed in NPT ensemble at 310 K and 1 atm for each system. Equilibration and production MD simulations were independently replicated 5 times by changing the random seed for initial velocity generation as previously described (Marino and Dell'orco, 2016 (link)), to achieve exhaustive sampling of the conformational space.
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Publication 2019
F 500 Familial Mediterranean Fever Magnesium Chloride Proteins Solvents STEEP1 protein, human Vertebral Column

Most recents protocols related to «F 500»

The concentrations of CaGP (Sigma-Aldrich, St Louis, MO, USA) adopted in this study were determined according to previous data [11 (link)], resulting in the following experimental groups: CaGP at 0.125, 0.25, and 0.5%, with or without 500 ppm F. In addition, solutions containing 500 and 1100 ppm F were evaluated, while pure AS was tested as a negative control (NC).
The biofilms were treated after 72, 78, and 96 h from their formation, resulting in three treatments [14 (link),36 (link)]. All the AS was gently removed by aspiration, and the biofilms were exposed to the experimental solutions for 1 min by gently pipetting the solutions into the wells [14 (link)]. Next, the solutions were removed from the wells, and the biofilms received fresh AS [14 (link)]. After the last treatment (96 h after the beginning of formation), the biofilms were washed with 0.85% NaCl, and the quantitative and qualitative experiments were performed [14 (link)].
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Publication 2023
Biofilms F 500 Sodium Chloride
Fig. 1 shows the sample preparation.

Sample preparation.

Sample preparation of CSPI_F: 200 g Fujipro-F was dissolved in 1800 g of distilled water at 5000 rpm for 3 min using a homogenizer (MARK II Model 2.5, Primix, Hyogo, Japan). The obtained sample was named ‘CSPI_F.’.
Sample preparation of CSPI_A: 21.8 g arginine (equivalent to 0.25 M in 500 mL) was added to 300 g 10 wt% CSPI_F. Then, the arginine and CSPI_F mixture was well stirred by a homogenizer at 5000 rpm for 3 min. 10 wt% CSPI_F was then added to the arginine and CSPI_F mixture for a total volume of 500 mL. The mixture of 50 g was placed in a 100-mL heat-resistant pressure bottle, and then the bottle was heated to 121 °C for 10 min by an autoclave (HICLAVE HG-50, Kitahama Manufacturing, Osaka, Japan). The bottles were cooled under running water for 30 min after heating. The mixture was placed in a MWCO 3500 g/ L dialysis tube. Dialysis was performed three times to remove ions and small molecules. The final electrical conductivity of the distilled water side was < 0.1 mS/cm. The obtained sample was named ‘CSPI_A.’.
Sample preparation of CSPI_U: 120.1 g urea (equivalent to 4.0 M in 500 mL) was added to 300 g of 10 wt% CSPI_F. 10 wt% CSPI_F was then added to the urea and CSPI_F mixture for a total volume of 500 mL. Then, the sample was heated in the same manner as the preparation of CSPI_A. After that, the heated sample was subjected to dialysis, and the obtained sample was named ‘CSPI_U.’.
Sample preparation of CSPI_G: 191.1 g guanidine hydrochrolide (equivalent to 4.0 M in 500 mL) was added to 300 g of 10 wt% CSPI_F. 10 wt% CSPI_F was then added to the guanidine hydrochrolide and CSPI_F mixture for a total volume of 500 mL. Then, the sample was heated in the same manner as the preparation of CSPI_A. Afterward, the heated sample was subjected to dialysis, and the obtained sample was named ‘CSPI_G.’.
Sample preparation of CSPI_H: 50.0 g of 10 wt% CSPI_F was heated in the same manner as the preparation of CSPI_A. Then, the heated sample was subjected to dialysis, and the obtained sample was named ‘CSPI_H.’.
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Publication 2023
Arginine Dialysis Electric Conductivity F 500 Guanidine Ions Preparation H Pressure Urea Vita Mark II
The flame signal generation module is schematically depicted in Fig. S1a. A Q-switched Nd:YAG nanosecond laser (AT Laser, GlobalCure) with 15 ns pulse full-width-at-half-maximum (FWHM), 4 Hz repetition rate, and ~ 5 mm beam diameter is used as the light source. It offers output options of 1064 nm and 532 nm (second harmonic). A concave lens of f = 50 mm BEL1 (Thorlabs, LC1715) and a convex lens of f = 200 mm BEL2 (Thorlabs, LA1708) are used to expand the output beam. An f = 500 mm cylindrical lens CyL (Thorlabs, LJ1144RM) generates a laser sheet of thickness ~ 400 µm inside the kerosene flame. The burner is mounted on a translation stage so that the laser sheet can excite different positions of the flame. A half-waveplate HWP (Thorlabs, WPH10M-1064 for 1064 nm and WPH10M-532 for 532 nm) and a linear polarizer P1 (Thorlabs, GL15) are used to adjust the laser fluence. The laser sheet is polarized along the y direction. The reflected light from a 10:90 (R:T) beam splitter BS1 (Thorlabs, BS025) is picked by a power meter for laser fluence measurement.
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Publication 2023
F 500 Kerosene Lens, Crystalline Light Pulse Rate YAG Lasers

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Publication 2023
Antibiotics Antibodies Antigens Colon Culture Media DAPI F 500 Homo sapiens Microscopy, Confocal Noncommunicable Diseases Operative Surgical Procedures Paraffin Embedding paraform Patients Tissues Triton X-100 Vaccination Virus Virus Diseases
A measuring apparatus was designed for testing the gas sensors (Figure 5). The apparatus allows for the precise adjustment of gas concentrations using Bronkhorst mass flow controllers MFC1 to MFC3 (F-201DV-AAD-22-K in the range 10 mL–500 mL, F-201EV-AAD-22-K in the range 40 mL–2000 mL). Synthetic air (SA: 21% O2 and the rest N2) is used as a carrier gas, which also serves as a purging gas. The exact concentration of the test gas can be obtained by mixing it with the carrier gas or by diluting the saturated vapor of the desired solvent from the bubbler with dry air. This second method is mainly used to generate different concentrations of humidity and volatile compounds (ethanol, methanol, acetone, toluene, cyclohexane, etc.). The resulting mixture is then injected into the test chamber with the tested sensor. The volume of the test chamber is 50 mL. A Keithley 2400 sourcemeter was used to measure the resistance. A relay multiplexer is used to switch individual sensors, which is controlled by a National Instruments USB-6351 DAQ (Data Acquisition) device (16 analog inputs, 24 digital inputs/outputs, 2 analog outputs, maximum sampling rate 125 MS/s). The resistance values of the sensors are measured every 250 ms. The connection of the sensors between the multiplexer and the sourcemeter is performed using a coaxial cable to reduce interference from external electromagnetic fields. The VICI EUTA-4VL4MWE2 four-port two-way valve is used to switch the flow of gasses (test gas–purge gas) to ensure a rapid increase to the target concentration of the test gas, and to avoid the influence of overflows during switching. The apparatus and measurement process are controlled by the LabView application.
The change in sensor resistance (∆R/R0) as a function of exposure time was investigated. The response of the sensor is given by the change in relative resistance,

where Rg represents the resistances upon exposure to a specific gas and R0 is the reference resistances in synthetic gas. The fabricated sensors were used for the detection of ammonia (NH3), carbon dioxide (CO2), nitrogen dioxide (NO2), acetone (CH3COCH3), toluene (C6H5CH3), and humid air (RH) under various concentrations at room temperature.
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Publication 2023
Acetone Ammonia Carbon dioxide Cyclohexane Electromagnetic Fields Ethanol F 500 Fingers Medical Devices Methanol Nitrogen Dioxide Solvents Toluene

Top products related to «F 500»

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PNGase F is an enzyme that cleaves the bond between the asparagine residue and the N-acetylglucosamine residue in N-linked glycoproteins. It is commonly used in the analysis and characterization of glycoproteins.
Sourced in Italy, United States
HPLC grade water is a type of ultra-pure water specifically designed for use in high-performance liquid chromatography (HPLC) applications. It is produced through a series of purification processes to remove impurities, ions, and organic compounds that could interfere with HPLC analysis. HPLC grade water is characterized by its high purity, low conductivity, and minimal contamination levels, making it suitable for sensitive HPLC instrumentation and assays.
Sourced in Germany, United States, United Kingdom
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DMSO is a versatile organic solvent commonly used in laboratory settings. It has a high boiling point, low viscosity, and the ability to dissolve a wide range of polar and non-polar compounds. DMSO's core function is as a solvent, allowing for the effective dissolution and handling of various chemical substances during research and experimentation.
89510-1KG-F is a laboratory product sold by Merck Group. It is a powder with a specified mass of 1 kilogram. The core function of this product is to provide a measured quantity of material for use in various laboratory applications. No further details about the intended use or specific properties of this product are provided.
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Sodium deoxycholate is a chemical compound used in various laboratory applications. It serves as a surfactant and emulsifier, assisting in the solubilization and dispersion of substances. The core function of sodium deoxycholate is to facilitate the manipulation and analysis of biological samples in research and diagnostic settings.
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Iodoacetamide is a chemical compound commonly used in biochemistry and molecular biology laboratories. It is a reactive compound that selectively modifies cysteine residues in proteins, thereby allowing for the study of protein structure and function. Iodoacetamide is often used in sample preparation procedures for mass spectrometry and other analytical techniques.
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Dithiothreitol (DTT) is a reducing agent commonly used in biochemical and molecular biology applications. It is a small, water-soluble compound that helps maintain reducing conditions and prevent oxidation of sulfhydryl groups in proteins and other biomolecules.
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Ammonium bicarbonate is a chemical compound with the formula (NH4)HCO3. It is a white crystalline solid that is commonly used as a leavening agent in baking and as a source of carbon dioxide in certain industrial processes.
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HEK293T cells are a widely used human embryonic kidney cell line. They are derived from human embryonic kidney cells transformed with sheared adenovirus 5 DNA. HEK293T cells are commonly used for a variety of applications, including gene expression, viral production, and cell-based assays.

More about "F 500"

The Fortune 500 (F500) is an annual ranking of the 500 largest U.S. public companies by total revenue.
These major corporations, spanning diverse industries, play a pivotal role in the American economy.
Leveraging the power of artificial intelligence (AI), platforms like PubCompare.ai can help F500 companies streamline their research protocols, enhance reproducibility, and drive innovation.
By effortlessly locating the most relevant protocols from literature, preprints, and patents, PubCompare.ai empowers these leading organizations to optimize their research efficiency and stay at the forefront of their fields.
This AI-driven platform can assist F500 companies in accessing a wealth of information, including valuable resources like PNGase F (an enzyme used in glycoprotein analysis), HPLC-grade water (a high-purity solvent for chromatographic applications), MS-grade formic acid (a common additive in mass spectrometry), and DMSO (a versatile solvent used in various research applications).
Additionally, PubCompare.ai can help F500 companies navigate the complexities of research materials such as 89510-1KG-F (a chemical compound used in biochemistry), sodium deoxycholate (a detergent employed in protein extraction), iodoacetamide (a reagent for protein modification), dithiothreitol (a reducing agent), and ammonium bicarbonate (a buffer used in proteomics).
By leveraging these cutting-edge technologies and resources, F500 companies can streamline their research processes, enhance reproducibility, and drive groundbreaking innovations that shape the future of their respective industries.
Ultimately, the integration of AI-powered platforms like PubCompare.ai can empower F500 companies to optimize their research workflows, stay ahead of the curve, and maintain their positions as leaders in the dynamic and ever-evolving business landscape.