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Nonlinear coupling of closely spaced modes in atomically thin MoS nanoelectromechanical resonators.
Microsyst Nanoeng
December 2024
Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL, 32611, USA.
Nanoelectromechanical systems (NEMS) incorporating atomic or molecular layer van der Waals materials can support multimode resonances and exotic nonlinear dynamics. Here we investigate nonlinear coupling of closely spaced modes in a bilayer (2L) molybdenum disulfide (MoS) nanoelectromechanical resonator. We model the response from a drumhead resonator using equations of two resonant modes with a dispersive coupling term to describe the vibration induced frequency shifts that result from the induced change in tension.
View Article and Find Full Text PDFEvaluation of change in the contact of IOL with the posterior capsule with respect to the orientation of haptics of the IOL using intraoperative spectral domain optical coherence tomography.
Indian J Ophthalmol
December 2024
University Eye Clinic Maastricht, Maastricht University Medical Center, Maastricht, The Netherlands.
Purpose: To study change in the contact of intraocular lens (IOL) with the posterior capsule with respect to the vertical versus horizontal orientation of the haptic-optic junction of the IOL using intraoperative spectral domain optical coherence tomography (SD-OCT).
Methods: Fifty eyes of 50 patients with senile immature cataract underwent topical phacoemulsification procedure with implantation of a monofocal IOL by a single experienced surgeon. The Rescan 700 SD-OCT system was used for intraoperative imaging.
Comparison of peripapillary and macular Optical Coherence Tomography parameters between children and young adults.
Indian J Ophthalmol
December 2024
VST Centre for Glaucoma Care, L V Prasad Eye Institute, Kallam Anji Reddy Campus, Hyderabad, Telangana, India.
Purpose: To compare the retinal nerve fiber layer (RNFL), ganglion cell-inner plexiform layer thickness, central subfield thickness (CSFT), and parafoveal and perifoveal thickness in children of different age groups with young adult controls by using spectral-domain optical coherence tomography.
Methods: This cross-sectional study included children aged 6-17 years and adult controls (18-22 years) - group 1: 6-9 years (57 eyes), group 2: 10-13 years (116 eyes), group 3: 14-17 years (66 eyes), and group 4 (controls): 18-22 years (61 eyes). A mixed-effects model was used to compare the OCT parameters among the groups, along with multivariable analysis.
Hybrid Chitosan Biosorbents: Tunable Adsorption at Surface and Micropore Domains.
Biomimetics (Basel)
November 2024
Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, SK S7N 5C9, Canada.
Herein, we report a study that provides new insight on the knowledge gaps that relate to the role of biopolymer structure and adsorption properties for chitosan adsorbents that are cross-linked with glutaraldehyde. The systematic modification of chitosan cross-linked with glutaraldehyde (CG) and its quaternized forms (QCG) was studied in relation to the reaction conditions: mole ratios of reactants and pH conditions. Complementary adsorbent characterization employed C NMR/FTIR spectroscopy, TGA and DSC, point-zero-charge (PZC), solvent swelling, and sorption studies using selected dye probes.
View Article and Find Full Text PDFSex differences in the reactivity of gastric myoelectrical activity and heart rate variability as putative psychophysiological markers in human pain research.
Front Neurosci
December 2024
Department of Neurology, Center for Translational Neuro-and Behavioral Sciences (C-TNBS), University Hospital Essen, University of Duisburg-Essen, Essen, Germany.
Background: This study explored the potential of electrogastrography (EGG) and heart rate variability (HRV) as psychophysiological markers in experimental pain research related to the gut-brain axis. We investigated responses to the experience of pain from the visceral (rectal distension) and somatic (cutaneous heat) pain modalities, with a focus on elucidating sex differences in EGG and HRV responses.
Methods: In a sample of healthy volunteers (29 males, 43 females), EGG and ECG data were collected during a baseline and a pain phase.
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