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How can I best clean used dipping electrodes and store unused for later use? Can I wash used dipping electrodes in an ethanol bath?

After withdrawing the dipping electrode array from the plate you can wipe off residual liquid with a tissue. Alternatively, you can wash used electrodes with ethanol which won't damage the electrodes. To avoid cross-contamination of non-used...

When can I start induction studies on Human Hepatocytes transfected with the Nucleofector®?

We recommend allowing the transfected hepatocytes to recover in Plating medium for 72 hours post-Nucleofection®.For induction studies (e.g. CYP3A4), the Plating medium is replaced with maintenance medium (William's E without FCS and EGF) and...

How can I find out if other 24-well culture plates than Greiner or Nunc are compatible to the dipping electrode array for adherent Nucleofection® using the 4D-Nucleofector® Y Unit?

Please find attached a list with all plate types that have been checked for compatibility so far. If your plate type is not on this list, please contact our Scientific Support Team we can investigate compatibility.

What is the lowest amount of Human Hepatocytes that can be used with the 96-well Shuttle® System or the 4D-Nucleofector® X-Unit?

Human hepatocytes do not like to be cultured and transfected at low densities. Therefore, using less than 100,000 cells per Nucleofection® is not recommended.

What kind of effects could a mycoplasma contamination have on my cells?

Mycoplasma contamination can: > Inhibit cell metabolism > Cause cell death > Induce morphological alterations > Alter DNA, RNA, and protein synthesis > Induce chromosomal aberrations > Cause increased sensitivity to inducers of...

How can I detect mycoplasma contamination of my cells?

We recommend using the 20-minute MycoAlert® Mycoplasma Detection Kit from Lonza. The simple four-step MycoAlert® Assay is a selective biochemical test that exploits the activity of mycoplasmal enzymes. The presence of these enzymes provides a rapid...

How can cells be cured of mycoplasma contamination?

Where contamination has occurred, and the sample absolutely cannot be discarded, the MycoZap™ Mycoplasma Elimination Reagent has been optimized to eliminate mycoplasma with minimal toxic effects on the cells. The MycoZap™ Reagent eliminates...

Do you have any instructions available for using a hemocytometer for cell counting?

Yes. Our technical guideline "Cell Counting and Determination of Viability via Hemocytometer" can be found as associated pdf file in the link below.

I transfected neurons using the 4D-Nucleofector® Y unit. During analysis I observed areas with low or no cell density, even in my no pulse control sample.

Cells might have been disturbed or ran dry during pipetting steps. Please perform liquid removal and additions well-by-well. Avoid leaving neurons without any liquid coverage (medium or Nucleofector® Solution). To keep a small liquid film on the...

When I transfected my cells, error 8 appeared on the display of the Nucleofector® IIN, IIS or 2b. What is the reason?

Error 8 occurs when there has been an arc within the cuvette during application of the electrical program. The pulse application started but was interrupted because too much current was detected. Efficiency may be lower than expected due to the...
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