We describe a microfluidic device designed specifically for the reversible immobilisation of (Fission Yeast) cells to facilitate live cell super-resolution microscopy. Photo-Activation Localisation Microscopy (PALM) is used to create detailed super-resolution images within living cells with a modal accuracy of >25 nm in the lateral dimensions. The novel flow design captures and holds cells in a well-defined array with minimal effect on the normal growth kinetics. Cells are held over several hours and can continue to grow and divide within the device during fluorescence imaging.
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http://dx.doi.org/10.1016/j.snb.2013.10.002 | DOI Listing |
Sci Rep
December 2024
Computer Engineering Department, Lorestan University, Khorramabad, Iran.
This paper presents a slot antenna integrated with a split ring resonator (SRR) and feed line, designed to achieve a high Q-factor while maximizing channel capacity utilization. By incorporating a lens into the dielectric resonator antenna (DRA), we enhance both bandwidth and directivity, with the dielectric material's permittivity serving as a key control parameter for radiation characteristics. We explore water and ethanol as controllable dielectrics within the terahertz (THz) frequency range (0.
View Article and Find Full Text PDFBiosens Bioelectron
December 2024
School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315200, China. Electronic address:
Routine screening for cardiovascular diseases (CVDs) through point-of-care assays for at-home or community-based testing of salivary biomarkers can significantly improve patient outcomes. However, its translatability has been hindered by a dearth of biosensing devices that streamline assay procedures for rapid biomarker quantitation. To address this challenge through end-to-end engineering, we developed an in-house, all-in-one microfluidic immunosensing device that integrates on-chip vibration-enhanced incubation, magnetic-assisted separation using immune magnetic bead probes, and colorimetric readout via absorbance measurements.
View Article and Find Full Text PDFTalanta
December 2024
Analytical Chemistry Division, Chemistry Department, Lomonosov Moscow State University, 119234, Moscow, Russia. Electronic address:
Novel and simple spectrophotometric and distance based procedures for thiols (L-cysteine, N-acetylcysteine, and glutathione) determination in biological fluids and pharmaceuticals have been proposed based on their inhibitory action on the oxidation of catechol in the presence of Agaricus bisporus crude extract (ABE). The influence of L-glycine, L-alanine, L-proline, L-methionine, L-cystine, ascorbic acid, uric acid, and bilirubin on the thiol determination has been investigated. Uric acid, bilirubin, L-cystine (oxidized thiol), and L-amino acids do not interfere with the determination.
View Article and Find Full Text PDFJ Mech Behav Biomed Mater
December 2024
Department of Prosthodontics, Dental and Craniofacial Bioengineering and Applied Biomaterials, School of Dentistry, Faculty of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki, 54124, Greece. Electronic address:
Introduction: Α customized organ-on-a-chip microfluidic device was developed for dynamic culture of oral mucosa equivalents (Oral_mucosa_chip-OMC).
Materials And Methods: Additive Manufacturing (AM) was performed via stereolithography (SLA) printing. The dimensional accuracy was evaluated via microfocus computed tomography (mCT), the surface characteristics via scanning electron microscopy (SEM), while the mechanical properties via nanoindentation and compression tests.
Methods Mol Biol
December 2024
Biomolecular Interaction Centre, University of Canterbury, Christchurch, New Zealand.
In this chapter, we describe the design and manufacture of a Lab-on-a-Chip (LoC) device suitable for measuring the μN forces exerted by tips of growing Phytophthora hyphae. LoC describes microfluidic devices, typically made of the polymer polydimethylsiloxane (PDMS), that are increasingly being used to answer fundamental questions in biological, chemical, physical, and medical research. These LoC devices enable the integration of several laboratory functions on small plastic devices that are quick to produce and easy to replicate.
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