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Dynamic fluidic manipulation in microfluidic chips with dead-end channels through spinning: the Spinochip technology for hematocrit measurement, white blood cell counting and plasma separation.
Lab Chip
January 2025
Department of Biotechnology and Bioengineering, Izmir Institute of Technology, Izmir 35430, Turkiye.
Centrifugation is crucial for size and density-based sample separation, but low-volume or delicate samples suffer from loss and impurity issues during repeated spins. We introduce the "Spinochip", a novel microfluidic system utilizing centrifugal forces for efficient filling of dead-end microfluidic channels. The Spinochip enables versatile fluid manipulation with a single reservoir for both inlet and outlet functions.
View Article and Find Full Text PDFA low-cost printed circuit board-based centrifugal microfluidic platform for dielectrophoresis.
Microsyst Nanoeng
January 2025
Henry Samueli School of Engineering, University of California, Irvine, CA, USA.
In recent decades, electrokinetic handling of microparticles and biological cells found many applications ranging from biomedical diagnostics to microscale assembly. The integration of electrokinetic handling such as dielectrophoresis (DEP) greatly benefits microfluidic point-of-care systems as many modern assays require cell handling. Compared to traditional pump-driven microfluidics, typically used for DEP applications, centrifugal CD microfluidics provides the ability to consolidate various liquid handling tasks in self-contained discs under the control of a single motor.
View Article and Find Full Text PDFLung Function Changes with Acute +Gz Exposure as Assessed by Impulse Oscillometry.
Aerosp Med Hum Perform
January 2025
Introduction: The introduction of fifth-generation fighter aircraft has raised concerns regarding the impact of high gravitational forces on lung function. This study aimed to investigate the acute effects of controlled +Gz exposure, up to +9 Gz, on lung function in military pilots using impulse oscillometry (IOS).
Methods: These studies, conducted in Canada and the Netherlands, involved military pilots undergoing high G centrifuge training.
Bicycle-inspired simple balance control method for quadruped robots in high-speed running.
Front Robot AI
January 2025
Research Institute of Electrical Communication, Tohoku University, Sendai, Japan.
This paper explores the applicability of bicycle-inspired balance control in a quadruped robot model. Bicycles maintain stability and change direction by intuitively steering the handle, which induces yaw motion in the body frame and generates an inertial effect to support balance. Inspired by this balancing strategy, we implemented a similar mechanism in a quadruped robot model, introducing a yaw trunk joint analogous to a bicycle's steering handle.
View Article and Find Full Text PDFExpression of MMP1, MMP3, and TIMP1 in intervertebral discs under simulated overload and microgravity conditions.
J Orthop Surg Res
January 2025
Department of Orthopedic Surgery, Beijing Chaoyang Hospital, Capital Medical University of China, Gongti South Rd, No. 8, Beijing, 100020, China.
Objective: This study aims to investigate changes in matrix metalloproteinase (MMP) and tissue inhibitor of metalloproteinase (TIMP) levels in the intervertebral discs of New Zealand white rabbits under simulated overload and microgravity conditions, focusing on the expression of MMP1, MMP3, and TIMP1. The findings aim to provide a theoretical foundation for preventing and delaying lumbar disc degeneration in these environments.
Methods: Overload was simulated using an animal centrifuge, and microgravity was mimicked through tail suspension.
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