Downstream Processing White Papers and Case Studies

  1. A Disposable Valve For Process Chromatography 8/15/2012

    This case study discusses the need for a fully automated, disposable chromatography system which was PLC controlled and designed for use in a cGMP environment. The required applications for the chromatography system included contamination removal, and concentration and purification of biologically derived proteins used in the production of research and clinical materials. 

  2. Effect Of Sterilization On Mechanical Properties Of Silicone Rubbers 6/18/2013

    Silicone rubber is widely used in the pharmaceutical industry where sterilizability is an essential requirement for all fluid transfer equipment. Pharmaceutical products must be sterilized frequently and repeatedly by high level energy and/or chemical vapor in order to eliminate bacterial surface contamination.

  3. Optimized Purity And Recovery Of A Monoclonal Antibody Using Mixed-Mode Chromatography Media 10/3/2016

    Monoclonal antibodies (mAbs) remain a predominant class of therapeutic protein products on the market because of their wide range of applications in disease treatment and diagnosis. Over the years, upstream technology advancements have helped improve the titer of target antibodies, from merely 1 g/L two decades ago to 10–13 g/L in fed-batch processes and up to 25 g/L in perfusion cultures today (Gronemeyer et al. 2014).

  4. How CHT Ceramic Hydroxyapatite Works Application Note 9/30/2016

    CHT ceramic hydroxyapatite is a versatile chromatography support used for separation of biological molecules as diverse as polyclonal and monoclonal antibodies, antibody fragments, enzymes, nucleic acids, and membrane proteins. By Paul Ng, Jie He, and Andrew Cohen, Bio-Rad Laboratories, Inc., Hercules, CA 94547

  5. Mammalian Virus Purification Using Ceramic Hydroxyapatite

    Conventional techniques for mammalian virus purification produce variable quality, quantity, and significant loss of particle infectivity. We  propose the chromatographic separation of viral particles of diverse sizes and from different families such as dengue, influenza, mouse hepatitis, adenovirus, poliovirus using CHT Ceramic Hydroxyapatite resin.

  6. Micro-Volume Determination Of Labeling Efficiency In A Standard Microplate Reader 2/12/2013

    A variety of methods and reagents have been developed to efficiently label biomolecules. By Peter J. Brescia, Applications Scientist,  BioTek Instruments, Inc.

  7. Protein A Alternatives: Mixed Mode Resins For High Throughput mAb Feedstocks 8/16/2012

    Mixed mode resins can serve as an alternative to protein A in intermediate processing. Implementation of mixed mode resins can reduce water required for filtration and time  for column loading.
     

  8. Biomanufacturing Flexibility 12/22/2011

    This white paper from BIO-G looks at how to create flexible, agile manufacturing facilities to respond to the current glut of biomanufacturing capacity and industry consolidation. Future proofing these facilities for higher titers and multiple product lines is also explored.

  9. White Paper: Comparability Of The Cell-Freeze® (Charter Medical) Freezing Bag To The Cryocyte™ (Baxter) Bag For Cryogenic Storage Of Human Hematopoietic Progenitor Cells 7/11/2011
    Successful cryopreservation of hematopoietic progenitor cells (HPC) is dependent upon a number of factors, including the biopreservation media, freezing rates, and storage using sterile, cryogenically durable storage bags. The Cell-Freeze® cryogenic storage containers are 510(k) cleared for storage, preservation and transfer of hematopoietic progenitor stem cells (HPC’s). By Charter Medical, Ltd.
  10. Improving DNA Removal from Bioprocess Purification Processes

    Many new biological drug products produced using recombinant DNA technology, such as monoclonal antibodies, are produced in cell culture. Because therapeutic proteins such as monoclonal antibodies are produced in cell culture, impurities can result from the host cells, or cell substrates. By 3M Purification Inc.