UV-Vis spectrophotometers have been used widely for nucleic acid quantification and quality control (QC) utilizing the fact that nucleic acids have a maximum absorbance at 260 nm (1). The concentration of nucleic acids can be easily estimated using the absorbance at 260 nm and the established absorption coefficient. Often a background correction is also performed, for example collecting a baseline using a solution containing everything but the nucleic acid or by measuring the absorbance at a wavelength that nucleic acids do not absorb. Double stranded nucleic acids are bound by hydrogen bonds between the base pairs. The temperature at which double stranded nucleic acids denature to become single stranded depends on the: – sequence and length of the nucleic acid – the pH and buffer conditions – and any mismatches in base pairs between the two strands As such, the melting temperature is very useful analytical tool and can be studied by monitoring the absorbance at 260 nm as temperature is increased or decreased. As the temperature is increased, the hydrogen bonds between the strands are broken and the double stranded nucleic acid separates into two
Biophysical and Aggregate Characterization for the Development of Biologics
June 10th 2025This eBook explores how advanced particle analysis technologies are revolutionizing biologic drug development. It highlights the importance of accurately identifying and characterizing subvisible particles to ensure drug safety, stability, and regulatory compliance. Techniques like Backgrounded Membrane Imaging (BMI) and Fluorescence Membrane Microscopy (FMM) are often used for their capabilities in detecting protein aggregates and degraded excipients such as polysorbates. Case studies and experimental results demonstrate how these tools provide high-throughput, low-volume analysis that enhances decision-making in formulation screening and manufacturing.
The Role of On-Demand Manufacturing and Derisking in Accelerating Early Clinical Trial Success
June 4th 2025Small pharmaceutical companies are constantly seeking innovative solutions to streamline early clinical trials. Adaptive clinical trials offer important benefits to sponsors and patients, both from a commercial and ethical standpoint. These trials offer flexibility and efficiency, especially in the early stages, where trial protocols can be adjusted based on interim data, such as introducing new doses or modifying participant sample size. However, adjusting manufacturing demand during an adaptive trial can be complicated, and strict regulatory requirements present significant challenges. On-demand manufacturing provides a robust solution, allowing for real-time supply and demand adjustments and improved trial flexibility. This paper explores how on-demand manufacturing meets the operational needs of adaptive trials and aligns with regulatory expectations.
Top 10 Cleanroom Problems That Can Be Prevented via Preventative Maintenance (May 2025)
May 16th 2025Cleanrooms require strict environmental control to maintain sterility, prevent contamination, and ensure seamless operations. Without a proactive preventative maintenance (PM) program, various issues can arise, leading to costly downtime, contamination risks, and operational inefficiencies. Below are ten common cleanroom problems that can be effectively mitigated through proper PM practices.