inherent Protocols

Category: Cell Biology and Cell Culture: Flow Cytometry Protocols: Flow Cytometry Calibration Protocols

Flow cytometers must be calibrated prior to fluorescence intensity measurements because of inherent instrument variability. To correct for this variability, a standard particle (fixed chicken red blood cells, or CRBCs) must be analyzed on the instrument prior to each experiment and photomultiplier tube (PMT) voltages adjusted accordingly to place the CRBC fluorescence emission peaks into predetermined target channels. - [Read Calibration of Becton Dickinson Flow Cytometers for Relative Fluorescence Intensity Measurements]

Category: Peptide Protocols: Peptide Storage

In general, peptide solutions are stable for up to a week at 4°C. However, if the peptide sequence has inherent instability (Peptide Stability), it might be better to freeze the solution when not in use. Peptide solutions at pH>8 should also be frozen when not in use. Sigma Aldrich. - [Read Peptide Handling and Storage]

Category: Pharmacology and Toxicology Protocols: Cytotoxicity Protocols: Cell Specific Cytotoxicity Assays Protocols

An in vitro red blood cell assay is presented which allows the estimation of the irritation potential of tensides and tenside containing materials such as shampoos, shower gels, cleaning products, etc. The estimation is based on the fact that surfactants interact strongly with cellular membranes and proteins.  Both effects are measured photometrically by use of the inherent native dye, oxyhemoglobin. - [Read Red Blood Cell Test System Protocol]