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Cryopreservation using liquid nitrogen frozen polyvinyl bags allows for storing cellular materials for extended periods while maintaining their activity and viability. Such bags are commonly used in the clinic to store blood products including blood cells, plasma, hematopoietic stem cells, umbilical cord blood for future uses including transplantation. These materials, typically obtained in limited quantities, may be of great therapeutic value, as is the case of stem cells or cord blood derived cells which can be used to potentially treat a number of diseases.

The invention is an enhanced vascular dilator that eliminates the vascular injury caused by the size mismatch between vascular introducer sheaths and vascular dilators, as the two are advanced into a blood vessel. The invention provides a “shoulder” to match the diameter of the introducer sheath so that there is a smooth transition, without size mismatch, between the dilator and the introducer sheath. The invention allows the dilator to be withdrawn in segments from the introducer sheath.

How much does a mouse eat per day? If a researcher is conducting dietary studies, the answer is very important. For instance, obesity studies require accurate measures of feeding. Existing automated methods for taking feeding measurements are expensive and use specialized caging that is not compatible with typical vivarium colony racks. As a result, many researchers simply weigh food each day or two to determine how much food the mice ate. This is time-consuming, can be error prone, and provides a low temporal resolution view of feeding.

The rapid worldwide spread and impact of COVID-19 caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has created a need for accurate, reliable, and readily accessible testing on a massive scale.

This invention relates to a warning system designed to protect individuals working near hazardous machinery. The system consists of a proximity-warning transmitter mounted to hazardous machinery and a receiver, worn by a worker, capable of detecting the transmitter signal. This worker-safety system can incorporate visual alerts and audible alerts. It also allows automatic shutdown of machinery upon receiver activation and may be particularly useful in the mining industry.

This invention consists of a sampling apparatus that utilizes one or more cyclone separators to collect airborne particles from the atmosphere. The apparatus not only separates out aerosols from the atmosphere, but also serves as a collection tube for aerosol particles. Through its unique design, this CDC-developed apparatus is able to use the centrifugal force of the air flow on aerosolized particles forcing them to separate by size. Since the sample is collected directly in a microcentrifuge tube, in situ analysis of the ambient particulates can be performed.

Improper positioning of an extension ladder frequently results in "ladder slide-outs," which are the most common cause of ladder-fall scenarios. This invention relates to an extension ladder positioning indicator which is easily installed in a ladder rung; provides multiple cues (visual, sound, and vibration) for rapidly identifying and positioning correct ladder inclination.

This CDC invention entails methods and apparatuses for in situ testing seal integrity and improved operation of respiratory masks (respirators). A variety of external factors, such as individual face shape, user environment, mask age and material used to construct the respirator, can lead to device malfunction and failure to sufficiently protect a user. To address these limitations, this invention relies on ultrasonic wave detection to assess face seal quality and other potential leak paths, as needed.

This technology pertains to monitors for measuring the mass concentration of ambient particulate matter in an atmosphere containing both larger/coarser (e.g., respirable dust) and smaller/finer (sub-micrometer particles such as diesel particulate matter - DPM) particulate mixtures. The monitoring device can be configured for operation with a controller unit adapted to ionization sensor and/or light-scattering modules. The controller translates the sensor output signal into a quantifiable value, determining mass concentration of particulate matter within the ionization chamber.