Speaking is one of the characteristics of the human race and the main factor that has marked our progress over time. The singing voice is the crowning of the speech act and the main component of the lyrical manifestation of personality. Doctors in various fields, but especially anatomists have been concerned about discovering how the voice and the substrate of its variability are formed, but these aspects have not yet been fully deciphered. This study is the starting point in our research on the phonation system, organized on three levels: laryngeal, oral, palatinal, pharyngeal, epiglottal and nasal. We performed the dissection of seven embalmed anatomical parts, on which, we made measurements of the anatomical elements involved in the phonation. We performed the same measurements on a batch of seven adults investigated by magnetic resonance imaging (MRI). The results were entered into the statistical calculation formulas and compared with each other and with the literature. The results of the study show that certain values resulting from the calculation formulas remain constant and others vary greatly from each individuals and gender.
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Int J Biol Macromol
January 2025
Department of Pharmaceutics, Faculty of Pharmacy, University of Sadat City, P.O. Box 32897, Menoufia, Egypt; Nanomedicine Laboratory, Faculty of Pharmacy, University of Sadat City, P.O. Box 32897, Sadat City, Egypt. Electronic address:
Silver sulfadiazine (SSD) is a widely used antibacterial agent for burn wound treatment owing to its capability in re-epithelialization and wound healing. However, due to its low solubility, the need for an effective drug delivery system is mandatory. This study aimed to optimize SSD nanostructured lipid-based carriers (NLCs), incorporated in a collagen sponge form as an innovative topical dosage form for effective burn wound treatment.
View Article and Find Full Text PDFSci Adv
January 2025
Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY 14853, USA.
Predicting the dynamics of turbulent fluids has been an elusive goal for centuries. Even with modern computers, anything beyond the simplest turbulent flows is too chaotic and multiscaled to be directly simulatable. An alternative is to treat turbulence probabilistically, viewing flow properties as random variables distributed according to joint probability density functions (PDFs).
View Article and Find Full Text PDFThe misalignment between the geometric and optical axes, combined with rotational asymmetry, poses significant challenges for achieving high-accuracy measurement of the off-axis aspheric mirror during the fabrication and polishing processes. To address this issue, this paper presents a method based on stereo deflectometry for measuring the figure of the off-axis aspheric mirror. In this method, point cloud of the off-axis aspheric mirror is first obtained using stereo deflectometry.
View Article and Find Full Text PDFBMC Musculoskelet Disord
January 2025
Department of Spine Surgery, Ameos Clinic Eutin, Eutin, Germany.
Purpose: The aim was to assess the clinical outcomes after posterior spinal fusion (PSF) in patients with Scheuermann's disease (SD).
Methods: SD undergoing PSF were retrospectively analyzed. Clinical outcome was determined using SRS-22- and Eq.
Sci Rep
January 2025
School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, China.
To investigate the reasonable calculation value of the transverse design bending moment of a long-span cantilever box girder bridge deck under vehicle load, the plate beam model and beam element frame model were established according to the concept of load effective distribution width in the Chinese highway specifications. The local finite element model and full bridge model of a long-cantilever plate were established using the plate-shell element. The practical calculation formula and finite element analysis of the transverse bending moment of a bridge deck were studied.
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