Results 61 to 70 of about 182,114 (232)

Differential sensitivity to SHH signaling and neural crest‐mediated Gas1 expression regulate jaw size during development and evolution

Developmental Dynamics, EarlyView.
Abstract Background Developmental control of jaw size is crucial to prevent birth defects and facilitate evolutionary adaptation. We have shown that jaw size is established by neural crest mesenchyme (NCM), which are progenitor cells that migrate into the mandibular primordia and produce the jaws.
Zuzana Vavrušová, Daniel B. Chu, An Nguyen, Yeniko Ta, Jennifer L. Fish, Richard A. Schneider   +5 more
wiley   +1 more source

Brush Seal Performance with Ideal Gas Working Fluid under Static Rotor Condition

Machines
The study investigated how variations in pressure ratio affect the leakage flow of a brush seal for both contact and clearance structures, in which the clearance is measured as the distance between the bristles tip and the rotor surface.
Altyib Abdallah Mahmoud Ahmed, Meihong Liu, Yuchi Kang, Juan Wang, Aboubaker I. B. Idriss, Nguyen Thi Trung Tin   +5 more
doaj   +1 more source

Microleakage of Pit and Fissure Sealants after Using Different Occlusal Surface Preparation Techniques: An In Vitro Study

Journal of Baghdad College of Dentistry, 2016
Background: The marginal seal is essential for sealant success because penetration of bacteria under the sealant might allow caries onset or progression. The aim of the present study was to estimate and compare the microleakage of pit and fissure sealant
Nibal Mohammed Hoobi
doaj   +1 more source

Transition Metal Compounds as Thermochromic Materials: Classification, Properties, Limitations, and Applications

EcoEnergy, EarlyView.
This review systematically examines how different transition metal compounds—such as binary and multinary metal oxides, halides, sulfides, and salts—exhibit thermochromism based on the d‐electron configurations of their transition metal cations. It focuses on three main mechanisms of thermochromism: phase transition, charge transfer, and bandgap change.
Jie Wang, Shan Wang, Long Yuan, Ling Zuo, Hui Qi, Changmin Hou   +5 more
wiley   +1 more source

Effect of Sequential and Combined Space‐Based Stressors on Perovskite Solar Cell Stability

EcoEnergy, EarlyView.
A correlation between loss in performance and mobile ion concentration has been established by sequential stressing of perovskite solar cells under Low Earth Orbit conditions with exposure to protons, light, and thermal cycling. It is shown that the loss in performance increases when ion concentration increases and vice versa.
Saivineeth Penukula, Brandon K. Durant, Megh N. Khanal, Mohin Sharma, Todd A. Byers, Vincent R. Whiteside, Haley P. Harblin, Ian R. Sellers, Bibhudutta Rout, Nicholas Rolston   +9 more
wiley   +1 more source

The Reality and Direction of Korean Dental Hygiene Education in the Super‐Aged Society

Journal of Dental Education, EarlyView.
ABSTRACT Objectives This study aims to analyze the structural features and key issues of dental hygiene education and the national licensing examination in response to a super‐aged society. To this end, the current status and challenges of Korea's dental hygiene education system are reviewed, and comparative analyses of corresponding systems in the ...
Ji‐Won Choi, Jeewan Chun, Sang‐Hwan Oh   +2 more
wiley   +1 more source

Analysis of Brush Seal Performance in Cantilever Beam Models Based on Instantaneous Friction Coefficient Correction

Aerospace
Brush seals, as a fundamental dynamic sealing technology in the aerospace and energy propulsion industries, require performance enhancement through instantaneous adjustment of the friction coefficient and force analysis of brush filaments.
Guiye Wen, Meihong Liu, Junjie Lei
doaj   +1 more source

A Morphological Study of Restoration of Damaged Hair Fiber With Chemical Treatments Using Microscopy Techniques

Microscopy Research and Technique, EarlyView.
Assessment of Restoring Chemically Damaged Hair Fibers Using Microscopy and Spectroscopy. ABSTRACT This paper analyses hair restoration products currently on the market that treat chemically processed hair. This study measured the restoration of structural integrity in hair samples from both chemically damaged hair (chemically relaxed, bleached, and ...
L. P. A. Mauricio, R. A. D. Cunha, S. M. Alves   +2 more
wiley   +1 more source

Impact of toothbrush type and periodontal phenotype on root coverage stability: A 6‐year observational follow‐up of a randomized clinical trial

Journal of Periodontology, EarlyView.
Abstract Background This 6‐year observational follow‐up of a randomized, parallel‐arm clinical trial evaluated the association between toothbrush type and periodontal phenotype on the long‐term stability of the gingival margin (GM) following coronally advanced flap (CAF) surgery.
Raffaele Acunzo, Enrico Limiroli, Silvia Ricoboni, Giorgia Saracino, Giulio Rasperini   +4 more
wiley   +1 more source

Prediction of Leakage Flow Rate and Blow-Down in Brush Seals via 2D CFD Simulation with Porosity Correction

Applied Sciences
Brush seals are extensively used in rotating equipment, such as gas turbines and compressors, providing effective sealing while accommodating radial, axial, and angular movements between components.
Jeong Woo Kwon, Joon Ahn
doaj   +1 more source