Maintaining the integrity of cryogenically preserved biological materials is critical, as even brief, undetected temperature excursions in storage can compromise sample viability. Existing monitoring systems may miss transient thaw–refreeze events, posing serious quality risks. To address this, we developed and validated frozen indicator tubes that visually signal deviations from the frozen state, serving as a cost-effective backup to electronic monitors. Our first method uses an aqueous dye solution that immobilizes the dye when frozen; any thawing causes the dye to disperse, providing a clear, external visual cue of a partial or complete thaw. For ultra-low-temperature storage (−80 °C), we introduced a second method using an ethanol-based solution calibrated to indicate thaw events. This system detects temperature rises of 10 °C or more sustained for at least fifteen minutes—conditions that may jeopardize sample stability. When paired with standard monitoring systems, these indicator tubes offer an added layer of protection by providing simple, reliable, and immediate visual confirmation of critical temperature breaches. This innovation enhances confidence in cryogenic storage protocols and supports the long-term preservation of sensitive biological materials.

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Background Biobanks are critical infrastructures for biomedical research but are energy- and cost-intensive due to reliance on ultra-low temperature (ULT) storage and redundant systems. The challenge is reducing environmental impact without compromising specimen quality or continuity. Service centers are well positioned to address this challenge, operating at scale and providing governance beyond the capacity of individual laboratories. Methods The Johns Hopkins Biobank, a CAP-accredited service-center repository, partnered with the School of Medicine Energy and Sustainability Committee to conduct a freezer audit across 34 departments and two campuses. Inventories were assessed for age, utilization, and efficiency, and policies were implemented to encourage migration of biospecimens into centralized storage. Strategies prioritized vapor-phase liquid nitrogen (LN 2 ) for viable collections and incorporated MVE Variō systems as energy-efficient alternatives for ULT needs. Governance required investigators to evaluate centralized options before acquiring new freezers, reinforced through outreach at faculty meetings and symposia. Results The audit identified nearly 1,300 ULT freezers, with over 70% beyond their median life expectancy of 8.5 years. Consolidation of specimens into a Biobank-managed freezer farm reduced institutional energy demand and improved monitoring. LN 2 provided stability for viable specimens, while Variō units offered adjustable storage (–20 °C to –150 °C) with minimal electricity use and no facility cooling load. Governance helped to curb uncontrolled expansion of departmental freezers, while the Biobank functioned as an emergency response resource with at-temperature backup capacity. Adoption of centralized storage has been gradual but continues to expand. Conclusions This case study demonstrates how an academic service center can integrate sustainability, quality, and contingency planning. The Johns Hopkins Biobank illustrates that shared resources, supported by institutional governance, provide a practical framework to reduce environmental impact while ensuring uncompromising specimen protection.

Background Biobanks are critical infrastructures for biomedical research but are energy- and cost-intensive due to reliance on ultra-low temperature (ULT) storage and redundant systems. The challenge is reducing environmental impact without compromising specimen quality or continuity. Service centers are well positioned to address this challenge, operating at scale and providing governance beyond the capacity of individual laboratories. Methods The Johns Hopkins Biobank, a CAP-accredited service-center repository, partnered with the School of Medicine Energy and Sustainability Committee to conduct a freezer audit across 34 departments and two campuses. Inventories were assessed for age, utilization, and efficiency, and policies were implemented to encourage migration of biospecimens into centralized storage. Strategies prioritized vapor-phase liquid nitrogen (LN 2 ) for viable collections and incorporated MVE Variō systems as energy-efficient alternatives for ULT needs. Governance required investigators to evaluate centralized options before acquiring new freezers, reinforced through outreach at faculty meetings and symposia. Results The audit identified nearly 1,300 ULT freezers, with over 70% beyond their median life expectancy of 8.5 years. Consolidation of specimens into a Biobank-managed freezer farm reduced institutional energy demand and improved monitoring. LN 2 provided stability for viable specimens, while Variō units offered adjustable storage (–20 °C to –150 °C) with minimal electricity use and no facility cooling load. Governance helped to curb uncontrolled expansion of departmental freezers, while the Biobank functioned as an emergency response resource with at-temperature backup capacity. Adoption of centralized storage has been gradual but continues to expand. Conclusions This case study demonstrates how an academic service center can integrate sustainability, quality, and contingency planning. The Johns Hopkins Biobank illustrates that shared resources, supported by institutional governance, provide a practical framework to reduce environmental impact while ensuring uncompromising specimen protection.

Institutional biobanks are essential infrastructure supporting clinical research, translational discovery, and public health preparedness. However, many biobanks rely on institutional subsidies or unstable grant funding, creating long-term financial vulnerability. The Johns Hopkins Biobank, operating within the multi-division Genetic Resources Core Facility (GRCF), provides a practice-based example of a financially resilient model for academic biobanking. As a College of American Pathologists (CAP) accredited program structured as a fee-for-service enterprise, the Biobank targets a net-zero financial balance in accordance with U.S. federal guidance for service centers. All operational costs, including personnel, infrastructure, and institutional overhead, are recovered through transparent annual storage fees and transactional service charges, enabling high-quality stewardship without reliance on external subsidy. Integration within a broader service center portfolio provides operational flexibility, supports rigorous governance and regulatory compliance, and ensures continuity during periods of fluctuating research demand. This case illustrates how aligning biobanking with institutional service center frameworks can strengthen financial sustainability, enhance accountability, and support long-term access to high-quality biospecimens as part of public health research infrastructure. This model supports public health preparedness by ensuring stable access to biospecimens critical for infectious disease response, clinical trials, and translational science. Further, it offers transferable lessons for academic institutions seeking to future-proof biobanking operations while upholding rigorous standards for quality and participant trust.

Background Biobanks are critical infrastructures for biomedical research but are energy- and cost-intensive due to reliance on ultra-low temperature (ULT) storage and redundant systems. The challenge is reducing environmental impact without compromising specimen quality or continuity. Service centers are well positioned to address this challenge, operating at scale and providing governance beyond the capacity of individual laboratories. Methods The Johns Hopkins Biobank, a CAP-accredited service-center repository, partnered with the School of Medicine Energy and Sustainability Committee to conduct a freezer audit across 34 departments and two campuses. Inventories were assessed for age, utilization, and efficiency, and policies were implemented to encourage migration of biospecimens into centralized storage. Strategies prioritized vapor-phase liquid nitrogen (LN 2 ) for viable collections and incorporated MVE Variō systems as energy-efficient alternatives for ULT needs. Governance required investigators to evaluate centralized options before acquiring new freezers, reinforced through outreach at faculty meetings and symposia. Results The audit identified nearly 1,300 ULT freezers, with over 70% beyond their median life expectancy of 8.5 years. Consolidation of specimens into a Biobank-managed freezer farm reduced institutional energy demand and improved monitoring. LN 2 provided stability for viable specimens, while Variō units offered adjustable storage (–20 °C to –150 °C) with minimal electricity use and no facility cooling load. Governance helped to curb uncontrolled expansion of departmental freezers, while the Biobank functioned as an emergency response resource with at-temperature backup capacity. Adoption of centralized storage has been gradual but continues to expand. Conclusions This case study demonstrates how an academic service center can integrate sustainability, quality, and contingency planning. The Johns Hopkins Biobank illustrates that shared resources, supported by institutional governance, provide a practical framework to reduce environmental impact while ensuring uncompromising specimen protection. As an institutional case study, this report is intended to illustrate operational strategy within a defined governance and infrastructure environment rather than to function as a universally prescriptive implementation model.