Because of the phenomena which were noticed in clinical and laboratory work of permanent stomatological metallographical and other researches of the consequences of free changed conditions in melting and cooling phase of dental alloy auropal were carried out. Modality of the changes during melting of this alloy in dental laboratory were systematically chosen according to noticed phenomena in praxis. Main objective was to metallographicly determine these phenomena during the process. With application of usual methods for setting of metallographical carved pie, samples were researched with metallographical microscope Epiryp 2 from Zeiss-jena, under different melting conditions and filmed with different enlargement. Even small changes of melting and cooling conditions are causing in microstructure and these are reflecting on the alloy characteristics. According to this melting procedure is a very sensitive and complex problem in termical laboratory processing which demands maximum attention an strict following fabrical instructions in order to avoid unwanted consequences in clinical application.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Probing the impact of commercial cryoprotectants and freezing technique on the motility of human spermatozoa cryopreserved onto extremely water-repellent soot-coated surfaces.
Cryobiology
January 2025
Specialized Surgical Hospital "Doctor Malinov", 46, Gotse Delchev blvd., 1860 Sofia, Bulgaria.
The cryopreservation of human spermatozoa is an integral part of cryobiology, aiming to support the in-vitro fertilization. The latter relies on the availability of as much as possible reproductively active spermatozoa, whose number after thawing decreases due to the accompanied freezing injury and the cytotoxicity of cryoprotectants. An innovative option to circumvent these obstacles is to make the freezing interface non-wettable, by coating it with rapeseed oil soot possessing intrinsic cryoprotective properties, delaying the ice formation and possibly providing identical rates of intracellular dehydration and extracellular crystallization.
View Article and Find Full Text PDFHomogeneous boiling over melting ice.
Sci Rep
January 2025
Mechanical Engineering Department, University of South Florida, Tampa, FL, 33620, USA.
We report on discovering the homogeneous boiling within a liquid film residual resting in equilibrium over a melting ice block. This phenomenon was induced via longwave infrared radiation generated by a continuous wave [Formula: see text] laser. This investigation employed a high-speed camera and the Schlieren visualization technique.
View Article and Find Full Text PDFThe Impact of Process Parameters on the Lyophilized Porous Micro-structure: A Case Study of Dextran.
J Pharm Sci
December 2024
Institute of Energy and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland. Electronic address:
Freeze-drying is used to prolong the shelf life of pharmaceutical formulations stored in vials. To achieve this, formulations are first frozen and then dried, yielding a porous product that can in some cases be stored even at ambient conditions. In this work, the effect of different process parameters on the properties of the porous micro-structure obtained when freeze-drying dextran solutions was studied.
View Article and Find Full Text PDFThermal management of photovoltaic module using affordable organic phase change material combined with nano metal oxide particles enhancer.
Heliyon
December 2024
Mechanical Engineering Division, Faculty of Engineering, Khon Kaen University, Thailand.
Phase change materials (PCMs) have been widely recognized as a highly efficient medium for thermal energy storage. Many studies have identified the low thermal conductivity of PCMs. In the current investigation, the researchers have blended PCM with nanoparticles to enhance its thermal conductivity and electrical efficiency.
View Article and Find Full Text PDFApplication of an Innovative Embedding and Cooling Component in the Critical Steps of Fragmented Tissue Pathological Diagnosis.
Microsc Res Tech
December 2024
Department of Pathology, the First Affiliated Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China.
This study aimed to explore the application value of an innovative embedding and cooling component in the critical steps of fragmented tissue pathological diagnosis. Eighty small and fragmented tissue samples were collected and randomly divided into two groups. The embedding qualification rate and embedding efficiency were compared between the two groups.
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!