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Tools
- A260 Quantitation
UV absorbance conversion
- Bacterial Transformation Efficiency
Calculate CFU/ug and log efficiency
- Cell Doubling Time
Growth rate and doubling time from counts
- Cell Seeding
Cell/well and cell/cm짼 planning
- DNA/RNA Copy Number
Convert mass to copies and dilution plan
- Gel Loading Calculator
Volume needed for target DNA mass
- Hemocytometer
Counts to viable cells and viability
- Ligation Setup
Insert:vector molar ratio helper
- Multi-Stock Mixing
Mixing many components accurately
- PCR/qPCR Master Mix
Reaction planning and component balancing
- qPCR Relative Quantification (ddCt)
Compute ddCt and fold change
- RCF / RPM Calculator
Convert centrifuge force and speed
- Reconstitution Helper
Dissolve mass to target concentration
- Serial Dilution Planner
Step-wise dilution steps
Examples
- 10-fold Serial Dilution Example for a Standard Curve
Worked example showing how to build a standard curve dilution series without carryover mistakes.
- A260 Purity Check Example Before PCR
Worked example for deciding whether a nucleic acid prep is clean enough for downstream use or needs cleanup first.
- Cell Seeding Example for a 6-well Plate
Worked example for turning a live cell count into a practical seeding plan for a 6-well experiment.
- Copy Number Example for qPCR Standard Preparation
Worked example for converting DNA mass into copies and preparing a standard series with enough volume for replicates.
- Hemocytometer and Trypan Blue Example
Worked example for converting manual chamber counts into viable cell concentration and viability.
- Ligation Ratio Example for Insert and Vector Planning
Worked example for choosing insert amount from vector mass, fragment length, and target molar ratio.
- PCR Master Mix Example for a 25 uL Reaction
Worked example for setting up a 25 uL endpoint PCR reaction with overage and control wells.
- qPCR ddCt Interpretation Example
Worked example for turning Ct values into dCt, ddCt, and fold-change with interpretation notes.
- RCF to RPM Conversion Example for a New Rotor
Worked example for converting a published spin force into the RPM needed on a centrifuge with a different rotor radius.
- Transformation Efficiency Example After Cloning
Worked example for calculating CFU per microgram and interpreting whether a low-colony outcome reflects competent cells, ligation, or plating dilution.
Guides
- A260 Purity Ratios in Practice
How to read A260/280 and A260/230 before using a sample
- Buffer pH / pKa
Why buffer compatibility matters
- Cell Seeding Density Planning
Translate target confluence and assay timing into a practical seeding plan
- Hemocytometer Counting Quality Checks
Reduce counting noise, clump bias, and dilution mistakes in manual counts
- Ligation Molar Ratio Planning
Choose insert and vector amounts without falling back to mass ratio shortcuts
- Osmolarity Curation
Practical checklist for media prep
- Primer Tm Curation
How to evaluate and compare Tm estimates
- qPCR ddCt Interpretation
Know when fold change is meaningful and when the upstream data are too weak
- RCF vs RPM for Centrifuge Protocols
Match published spin conditions to your own rotor instead of copying RPM blindly
- Statistical Test Chooser
Simple decision tree and links
Workflows
- Cell culture routine
Seeding, counting, and media handling checklist
- DNA quantification to PCR setup
Move from concentration check to dilution planning and final PCR mix assembly
- Genome Metadata Cleaner
Analyze and normalize genome metadata files with preview, review, and export controls.
- Ligation to transformation sequence
Connect ligation setup to transformation plating and final efficiency review
- Manual count to plating plan
Use hemocytometer data to prepare a mixed suspension and seed plates consistently
- Molecular cloning
Ligation molar ratio and dilution checks
- PCR and qPCR setup
Master mix balance and control planning
- qPCR standard curve preparation
Build a standard series, document copy number assumptions, and protect replicate volume