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Development of a non-invasive heart rate measurement method for sea turtles with dense keratinous scutes through effective electrode placement.
Front Physiol
January 2025
Atmosphere and Ocean Research Institute, The University of Tokyo, Kashiwa, Japan.
Article Synopsis
- Measuring the heart rate of sea turtles helps us understand their physiological adaptations, particularly focusing on the non-invasive ECG methods developed for loggerhead turtles.
- The study explored alternative electrode placements on the plastron of green sea turtles, finding successful ECG readings when the negative electrode was positioned near the neck.
- Results showed that resting heart rates averaged about 8.6 beats per minute, aligning with previous studies, and highlight the need for careful individual selection to improve measurement reliability.
We demonstrate a widely spaced, stabilized, and self-referenced opto-electronic oscillator driven electro-optic modulator based optical frequency comb. Using an ultra-stable Fabry-Perot etalon as a stable reference, we simultaneously stabilize a CW laser and generate a low noise and stable RF oscillation used to drive an electro-optic comb. In such a manner, the Fabry-Perot etalon pins both the carrier-envelope-offset frequency ( ) and the repetition rate of the comb in place ( ), eliminating the need for an external RF oscillator.
View Article and Find Full Text PDFBiphasic lipid extraction from microalgae after PEF-treatment reduces the energy demand of the downstream process.
Biotechnol Biofuels Bioprod
January 2025
Institute for Pulsed Power and Microwave Technology (IHM), Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany.
Background: The gradual extrusion of water-soluble intracellular components (such as proteins) from microalgae after pulsed electric field (PEF) treatment is a well-documented phenomenon. This could be utilized in biorefinery applications with lipid extraction taking place after such an 'incubation' period, i.e.
View Article and Find Full Text PDFProtein synthesis is by far the most energetically costly cellular process in rapidly dividing cells. Quantifying translating ribosomes in individual cells and their average mRNA transit rate is arduous. Quantitating assembled ribosomes in individual cells requires electron microscopy and does not indicate ribosome translation status.
View Article and Find Full Text PDFBeaware of Intracardiac Potentials Induced by Intravascular Lithotripsy.
Catheter Cardiovasc Interv
January 2025
Department of Cardiology, Ageo Central General Hospital, Saitama, Japan.
Background: Intravascular lithotripsy (IVL), that generates shockwaves through spark gap discharge between emitters, has been increasingly used to treat severely calcified coronary artery lesions. However, there is a question as to whether IVL has no electrical effects on endocardial tissues or cardiac implantable devices (CIEDs).
Aims: The aim of this study was to investigate the effects of IVL-induced intracardiac potentials on cardiac electrophysiology and CIEDs.
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