Practical guides, calculation walkthroughs, and scale-up tips from the bench to the bioreactor. Written for working scientists.
Systematic guide to identifying bacterial, mycoplasma, and fungal contamination. Decision tree, PCR detection protocols, BSC airflow principles, and decontamination strategies with worked examples.
EngineeringFull cost breakdown of precision fermentation at commercial scale. COGS/kg benchmarks from 100 L to 200,000 L, breakeven analysis vs animal agriculture, and strategies for reaching price parity.
EmergingOptimize PEI:DNA ratio, cell density, temperature shift, and harvest timing for AAV and lentiviral vector manufacturing. Includes worked examples, titer benchmarks, and bioreactor scale-up protocols.
QC / AnalyticsMaster the three-stage FDA process validation lifecycle for biologics. Covers CPP-to-CQA mapping, PPQ batch design with statistical acceptance criteria, and continued process verification with control charts.
UpstreamCalculate specific growth rate from batch data, understand Monod kinetics, and control μ in fed-batch fermentation with worked examples and organism comparison data.
EngineeringMaster design of experiments for bioprocessing: screening designs, response surface methodology, definitive screening designs, and model validation with worked E. coli fed-batch examples.
EmergingData-driven strategies for maximizing AAV titer: transfection optimization, serotype-specific harvest timing, full/empty capsid separation, small molecule boosters, and bioreactor scale-up to 2000 L.
UpstreamStep-by-step kLa determination using dynamic gassing-out, sulfite oxidation, and Van't Riet correlations. Includes worked examples for stirred-tank and shake flask systems.
UpstreamCompare exponential, linear, and DO-stat feeding profiles. Learn when each strategy works best and how to calculate feed rates from kinetic parameters.
Scale-UpConstant P/V, tip speed, kLa, Re, and mixing time -- when to use each criterion, what breaks at scale, and how to choose for your specific process.
Cell CultureDiagnose viability drops, high lactate, low titer, and slow growth in CHO cultures. Decision trees and corrective actions for the most common failure modes.
DownstreamMonitor dynamic binding capacity over cycles, predict resin replacement timing, and optimize CIP protocols to extend Protein A lifetime and reduce purification costs.
QCCalculate maximum valid dilution, set up dilution series for LAL assays, and interpret results per USP <85>. Includes spike recovery validation and common pitfalls.
EmergingModel the complete mRNA manufacturing waterfall: IVT transcription yield, purification losses, LNP encapsulation efficiency, and final doses per batch at each scale.
EngineeringUnderstand the surface-area-to-volume problem, calculate heat generation from OUR, size jacket and coil systems using LMTD, and design for large-scale thermal management.
We publish practical bioprocess guides monthly. No spam, no fluff -- just technical content that saves you time.