The aims of this study were twofold: a) to characterize a wide array of time-independent and -dependent properties and b) to find possible correlations among the properties tested. Seven commercially available orthodontic adhesives were included in this study and ten cylindrical specimens were prepared from each material. Five specimens from each material were used for the characterization of Martens Hardness (HM), indentation modulus (E), and elastic index (η), and the remaining five for the determination of indentation creep (C). Al the aforementioned properties were identified by employing an Instrumented Indentations Testing (IIT) device with a Vickers indenter. The results of HM, E, η, and C were statistically analyzed by one way ANOVA and Tukey post hoc test, while the possible correlations among the aforementioned properties were determined by Spearman correlation test. Statistical significant differences were identified for all properties among the materials tested. Spearman correlation reveals that HM has a positive correlation with E. Both properties demonstrated a negative correlation with η and C, while no correlation was identified between η and C. Significant differences in the mechanical properties tested may also imply differences in their clinical behavior and efficacy.
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http://dx.doi.org/10.3390/ma12040646 | DOI Listing |
J Air Waste Manag Assoc
January 2025
School of Emergency Management and Safety Engineering, China University of Mining and Technology (Beijing), Beijing, China.
Dust emissions from open-pit mining pose a significant threat to environmental safety and human health. Currently, the range of dust suppressants used in coal mining is limited, often failing to account for their suitability across various stockpiles. This oversight results in poor infiltration after application, leading to insufficient crust formation and reduced durability.
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Pain Management Center, Neurocenter of Southern Switzerland, EOC, Lugano, Switzerland -
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January 2025
Tianjin Key Laboratory for Marine Environmental Research and Service, School of Marine Science and Technology, Tianjin University, Tianjin 300072, China.
Marine biofouling and corrosion have become the main problems affecting the development of the marine industry. Silicone-based coatings have been widely used for antifouling and anticorrosion due to their low surface energy. However, the poor adhesion and low mechanical stability of these materials limit their application in complex marine environments.
View Article and Find Full Text PDFAnalyst
January 2025
Department of Chemical and Biological Engineering, Andong National University, Andong, Republic of Korea.
Here, we developed a novel, cost-effective fluorescence light-up biosensor for Pb detection based on a label-free G-quadruplex combined with modified thioflavin T (ThT) derivatives. Among the various G-quadruplex sequences tested, only T2 exhibited fluorescence light-up properties upon interacting with the modified ThT derivatives in the presence of Pb. To enhance the Pb sensing system, we also compared modified ThT derivatives, including the newly synthesized propyl-substituted ThT (ThT-P) and butyl-substituted ThT (ThT-B).
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January 2025
Division of Pharmaceutical Chemistry, Faculty of Pharmaceutical Sciences, Khon Kaen University, Khon Kaen 40002, Thailand.
Skin corrosion assessment is an essential toxicity end point that addresses safety concerns for topical dosage forms and cosmetic products. Previously, skin corrosion assessments required animal testing; however, differences in skin architecture and ethical concerns regarding animal models have fostered the advancement of alternative methods such as and models. This study aimed to develop deep learning (DL) models based on recurrent neural networks (RNNs) for classifying skin corrosion of chemical compounds based on chemical language notation, molecular substructure, physicochemical properties, and a combination of these three properties called conjoint fingerprints.
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