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Displaying 51 - 75 of 378

High-performance dual-gate graphene pH sensors

June 28, 2022
Author(s)
Son Le, Seulki Cho, Alexander Zaslavsky, Curt A. Richter, Arvind Balijepalli
High precision biophysical measurements that are portable and performed without prior labeling of the molecules can greatly benefit several areas of biotechnology and biophysics, but existing techniques often lack sufficient resolution. Field-effect

Engineering 3D Printed Scaffolds with Tunable Hydroxyapatite

June 15, 2022
Author(s)
Yoontae Kim, Eun Jin Lee, Anthony Kotula, Shozo Takagi, Laurence C. Chow, Styliani Alimperti
Bone grafting is a surgical procedure to bone repair due to trauma or diseases in the craniofacial and dental area. Current limitations of autogenous and allogeneic grafts are often associated with reduced host-graft integration due to geometrical confor

Interlaboratory Studies using the NISTmAb to Advance Biopharmaceutical Structural Analytics

May 5, 2022
Author(s)
Katharina Yandrofski, Trina Mouchahoir, M. Lorna De Leoz, David L. Duewer, Jeffrey W. Hudgens, Kyle Anderson, Luke Arbogast, Frank Delaglio, Robert Brinson, John Marino, Karen W. Phinney, Michael J. Tarlov, John E. Schiel
Biopharmaceuticals such as monoclonal antibodies are required to be rigorously characterized using a wide range of analytical methods. Various material properties must be characterized and well controlled to assure that clinically relevant features and

Certification of Standard Reference Material(R) 3655 Glycans in Solution (Frozen)

April 12, 2022
Author(s)
Mark Lowenthal, Blaza Toman, Brian Lang, Karen W. Phinney
Standard Reference Material (SRM) 3655 is intended primarily for use as a calibration standard for the measurement of enzymatically released N-linked glycans. Applications of SRM 3655 include the benchmarking and comparability of analytical techniques, as

Testing Precision Limits of Neural Network-Based Quality Control Metrics in High-Throughput Digital Microscopy

January 26, 2022
Author(s)
Chris Calderon, Dean C. Ripple, Charudharshini Srinivasan, Youlong Ma, Michael J. Carrier, Theodore Randolph, Thomas O'Connor
Digital microscopy is used to monitor particulates such as protein aggregates within biologic pharmaceutical products. The digital images that result encode a wealth of information, but much of this image data is underutilized in pharmaceutical process

Quantitative Determination of Cell Viability Using Absorbance Microscopy

January 19, 2022
Author(s)
Greta Babakhanova, Stephen Zimmerman, Laura Pierce, Sumona Sarkar, Nicholas Schaub, Carl Simon Jr.
Cell viability is an essential measurement for cell therapy products. One of the most common tests is Trypan blue (TB) dye exclusion where blue-stained cells are counted via imaging. Typically, live and dead cells are counted based on pixel intensities of

AbsorbanceQ: An App for Generating Absorbance Images from Brightfield Images

January 4, 2022
Author(s)
Stephen Zimmerman, Carl Simon Jr., Greta Babakhanova
The AbsorbanceQ app converts brightfield microscope images into absorbance images that can be analyzed and compared across different operators, microscopes and time. Absorbance-based measurements are comparable, which is useful when the aim is to

Excipient Innovation Through Precompetitive Research

December 20, 2021
Author(s)
Bruce Yu, Marc Taraban, Katharine Briggs, Robert Brinson, John Marino
The mRNA COVID-19 vaccines developed by Pfizer/BioNTech and Moderna represent a triumph of vaccine development. The core mRNA component of these vaccines is now almost a household name. Unbeknownst to most people, however, is that each of the two mRNA

Improving end-user trust in the quality of commercial probiotic products

September 24, 2021
Author(s)
Scott Jackson, Jean Schoeni, Buffy Stahl
In a rapidly growing global probiotic market, end-users have difficulty distinguishing between high quality and poor quality products. This threatens consumer and healthcare provider trust in probiotic products. To address this problem, we recommend that
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