A scanning electron microscope and heating microscope are used to visualize the microstructure of dental porcelain during fabrication and demonstrate the relationships of the porcelain firing conditions to the translucency and hue of the completed restoration. The firing cycle, temperature, rate of temperature rise, holding time, and cooling time influence the distribution of the sintering, glass, and crystal phases in the microstructure of the porcelain. Observing the changes of fritted porcelain and opacifiers as they progress through the firing cycle demonstrates how the quality of the final ceramic restoration is largely dependent on the firing conditions chosen.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Employment before and after initiation of dialysis or kidney transplantation- a Danish nationwide registry-based cohort study.
BMC Nephrol
January 2025
Department of Renal Medicine, Aarhus University Hospital, Palle Juul-Jensens Boulevard 35, Aarhus N, 8200, Denmark.
Background: Patients treated with chronic dialysis or kidney transplantation have difficulties in maintaining employment. We aimed to estimate employment rates among dialysis and kidney transplant patients from 3 years before to 3 years after initiating dialysis or undergoing transplantation.
Methods: All first-time dialysis and kidney transplantation patients aged 18-65 years in Denmark from 2005 to 2019 were identified using the Danish Nephrological Register and linked with information about social security benefits.
Quantitative analysis of amino acid excretion by Methanothermobacter marburgensis under N-fixing conditions.
Sci Rep
January 2025
Archaea Physiology & Biotechnology Group, Department of Functional and Evolutionary Ecology, University of Vienna, Wien, Austria.
Methanogenic archaea (methanogens) possess fascinating metabolic characteristics, such as the ability to fix molecular nitrogen (N). Methanogens are of biotechnological importance due to the ability to produce methane (CH) from molecular hydrogen (H) and carbon dioxide (CO) and to excrete proteinogenic amino acids. This study focuses on analyzing the link between biological methanogenesis and amino acid excretion under N-fixing conditions.
View Article and Find Full Text PDFDiagnostic performance of corneal epithelium- and Bowman's layer thickness mapping in patients with unilateral Keratoconus.
Graefes Arch Clin Exp Ophthalmol
January 2025
Department of Ophthalmology and Optometry, Medical University of Vienna, Vienna, Austria.
Purpose: To investigate the role of corneal epithelium- and Bowman's layer-thickness (ET and BLT) changes as possible early biomarkers of keratoconus (KC) development.
Methods: In this cross-sectional study patients with unilateral KC (UKC) and a group of healthy controls underwent polarization sensitive optical coherence tomography (PS-OCT) for the evaluation of corneal ET and BLT. These values were compared among three subgroups of eyes, i.
Review: A hierarchical research model to foster dialog between grazing ecology and beef cow energetics to support ecological intensification of native grassland.
Animal
November 2024
Centro Universitario de la Región Este, Universidad de la República, Uruguay.
Cow-calf systems grazing native grasslands must transition toward improved economic performance simultaneously with the conservation and improvement of ecosystem services they provide. We present an innovation model with this objective based on a hierarchical model that links functional relationships between state variables, grazing experiments and its validation, and co-innovation at the farm level. This paper describes the hypotheses, designs, and results of the studies, and the role of grazing ecology and herbivore nutrition to support the process of ecological intensification of livestock systems on native grasslands.
View Article and Find Full Text PDFUnlocking insights: Clinical associations from the largest 6-minute walk test collection via the my Heart Counts Cardiovascular Health Study, a fully digital smartphone platform.
Prog Cardiovasc Dis
January 2025
Division of Cardiovascular Medicine, Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA; Wu Tsai Human Performance Alliance, Stanford University School of Medicine, Stanford, CA 94305, USA; Center for Digital Health, Stanford University School of Medicine, Stanford, CA 94305, USA; Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA 94305, USA; Department of Genetics, Stanford University School of Medicine, Stanford, CA 94305, USA; Department of Biomedical Data Science, Stanford University School of Medicine, Stanford, CA 94305, USA. Electronic address:
Background: The six-minute walk test (6MWT) is a prognostic sub-maximal exercise test used clinically as a measure of functional capacity. With the emergence of advanced sensors, 6MWTs are being performed remotely via smartphones and other devices. The My Heart Counts Cardiovascular Health Study is a smartphone application that serves as a digital platform for studies of human cardiovascular health, and has been used to perform 30,475 6MWTs on 8922 unique participants.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!