Results 11 to 20 of about 428 (171)

Malleostapedotomy in Patients With Stapes Fixation: A Systematic Review. [PDF]

Laryngoscope
This systematic review analyses the current evidence on malleostapedotomy as a primary or revision procedure in patients with stapes fixation. Twenty‐five studies comprising 632 operated ears were included. Malleostapedotomy proved to be a safe and effective alternative to incus‐anchoring stapedoplasty, with favorable hearing outcomes and a low ...
Alicandri-Ciufelli M, D'Alessandro E, Lucidi D, Nocini R, Qiu HD.   +4 more
europepmc   +2 more sources

Molecular Dynamics in Tetrafluoridoborate Salts of Divalent Metals Studied by Nuclear Magnetic Resonance Spectroscopy. [PDF]

Chemphyschem
We studied molecular dynamics in four tetrafluoridoborate salts by means of nuclear magnetic resonance. Characteristical motions in these systems are thermally‐activated reorientations of BF4− ions. We determine the activation energies for these processes and compare the dynamics with those in borohydride systems that share the tetrahedral geometry of ...
Gradišek A, Radan K, Lozinšek M.
europepmc   +2 more sources

Comparison of four ventilation tubes commonly used in the pediatric population: A retrospective cohort study. [PDF]

Laryngoscope Investig Otolaryngol
Abstract Objective To assess differences in otorrhea, tympanic membrane perforation, and time to extrusion in children receiving one of four commonly used, short‐term ventilation tubes for the first time. Methods Retrospective chart review of 2 years of postoperative follow‐up to analyze patient outcomes after insertion of either a Paparella type‐I ...
Morrissette M, Ben-Dov T, Santacatterina M, Catháin ÉÓ, April MM.   +4 more
europepmc   +2 more sources

Increase in weldable material thickness in laser lap welding of fluoroplastics (Improving infrared absorption/transmission balance by changing laser wavelength)

Nihon Kikai Gakkai ronbunshu, 2023
Fluoroplastics have a very high absorptivity to the CO2 laser (oscillation wavelength: 10.6 μm) widely used industrially, so that only the surface layer of their substrates irradiated with the laser can be melted.
Kimitoshi SATO
doaj   +1 more source

The binder influence on the performance of positive electrodes of lithium-sulfur batteries [PDF]

Электрохимическая энергетика, 2021
The comparison of performance of positive electrodes of lithium-sulfur batteries made using the binders based on fluoroplastic (PVDF Solef 5310 and Kynar) and polyethylene oxide (PEO) was carried out.
Kulova, Tat'yana L'vovna, Li, Sergey Andreevich, Ryzhikova, Evgeniya Vladimirovna, Skundin, Aleksandr Mordukhaevich   +3 more
doaj   +1 more source

Research of tribotechnical properties of antifriction polymer compositions

Проблеми трибології, 2021
The analysis of antifriction polymer compositions on the basis of polyamide, epoxy, phenol-formaldehyde, furan resins, and also on the basis of fluoroplastic with various fillers working in friction knots is made.
R. M. Ostapenko
doaj   +1 more source

Estimation of S-parameters and dielectric permittivity of quartz ceramics samples in millimeter waveband

Доклады Белорусского государственного университета информатики и радиоэлектроники, 2021
A modified Nicholson – Ross – Weir method was used to determine complex parameters and dielectric permittivity of ceramic materials in the range 78.33–118.1 GHz.
N. A. Pevneva, D. A. Kondrashov, A. L. Gurskii, A. V. Gusinsky   +3 more
doaj   +1 more source

Ways to increase the wear resistance of pistons of internal combustion engines (review)

Проблеми трибології, 2021
The article analyzes the materials from which the piston is made for internal combustion engines. For automobile and tractor engines, in particular, eutectoid mixtures of the AL25 type and eutectoid mixtures containing copper, nickel, magnesium and ...
T. V. Dudchak
doaj   +1 more source

Photocatalytic water splitting of nanocomposite materials based on TiO2 and rGO nanorods [PDF]

Қарағанды университетінің хабаршысы. Физика сериясы, 2021
The paper presents the results of a study of films formed by titanium dioxide nanorods and deposited on their surface of reduced graphene oxide by electrochemical deposition.
T.M. Serikov, A.E. Sadykova, P.A. Zhanbirbayeva, A.S. Baltabekov , A.S. Kayumova   +4 more
doaj   +3 more sources

Assessing the Efficacy of Tragal Pumping in a Novel Tympanostomy Tube-Rat Model. [PDF]

OTO Open
Abstract Objective Tragal pumping (TP) is a practice of pushing on the tragus to raise pressure within the external auditory canal and is a commonly recommended adjunctive maneuver believed to facilitate the introduction of ototopical medications into the middle ear cavity via a tympanostomy tube. To investigate the efficacy of TP in the penetration of
Hara S, Liu X, Shah FA, Saeki H, Orita H, Sakyo A, Anzai T, Takata Y, Kamiya K, Matsumoto F, Gabrielson K.   +10 more
europepmc   +2 more sources