AI Article Synopsis
- The growing use of composite materials in manufacturing has created a need for quicker and more cost-effective curing processes.
- A new approach is introduced that uses ultrasonic spectroscopy to monitor the curing inside closed tools, allowing for precise tracking of curing times.
- Experimental results show a clear relationship between ultrasonic amplitude and the curing state, with the glass transition point marked by a significant drop in reflected amplitude.
Article Abstract
The increasing use of composite materials has led to a greater demand for efficient curing cycles to reduce costs and speed up production cycles in manufacturing. One method to achieve this goal is in-line cure monitoring to determine the exact curing time. This article proposes a novel method through which to monitor the curing process inside closed tools by employing ultrasonic spectroscopy. A simple experiment is used to demonstrate the change in the ultrasonic spectrum during the cure cycle of an epoxy. The results clearly reveal a direct correlation between the amplitude and state of cure. The glass transition point is indicated by a global minimum of the reflected amplitude.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5796376 | PMC |
| http://dx.doi.org/10.3390/s18010096 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Ab initio machine-learning unveils strong anharmonicity in non-Arrhenius self-diffusion of tungsten.
Nat Commun
January 2025
Institute for Materials Science, University of Stuttgart, D-70569, Stuttgart, Germany.
The knowledge of diffusion mechanisms in materials is crucial for predicting their high-temperature performance and stability, yet accurately capturing the underlying physics like thermal effects remains challenging. In particular, the origin of the experimentally observed non-Arrhenius diffusion behavior has remained elusive, largely due to the lack of effective computational tools. Here we propose an efficient ab initio framework to compute the Gibbs energy of the transition state in vacancy-mediated diffusion including the relevant thermal excitations at the density-functional-theory level.
View Article and Find Full Text PDFCircular RNAs as Key Regulators in Cancer Hallmarks: New Progress and Therapeutic Opportunities.
Crit Rev Oncol Hematol
January 2025
Institute of Human Genetics, Jena University Hospital, Jena, Germany; Urology and Nephrology Research Center, Research Institute for Urology and Nephrology, Shahid Beheshti University of Medical Sciences, Tehran, Iran. Electronic address:
Circular RNAs (circRNAs) have emerged as critical regulators in cancer biology, contributing to various cancer hallmarks, including cell proliferation, apoptosis, metastasis, and drug resistance. Defined by their covalently closed loop structure, circRNAs possess unique characteristics like high stability, abundance, and tissue-specific expression. These non-coding RNAs function through mechanisms such as miRNA sponging, interactions with RNA-binding proteins (RBPs), and modulating transcription and splicing.
View Article and Find Full Text PDFClinical Manifestations.
Alzheimers Dement
December 2024
Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil.
Background: Mild Cognitive Impairment (MCI) is a cognitive decline that is greater than expected for an individual's age and level of education, but which does not interfere with functionality. It may be divided into amnestic (when it predominantly affects memory) and non-amnestic (other cognitive domains). One of the cognitive functions that may be affected by MCI is language.
View Article and Find Full Text PDFBasic Science and Pathogenesis.
Alzheimers Dement
December 2024
Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, Itabashi-ku, Tokyo, Japan.
Background: Although amyloid deposition in brain is one of the hallmark pathological features of Alzheimer's disease (AD), the upstream events and its molecular environment in AD brain remain largely unknown. Recent advances in analytical methods such as mass spectrometry can provide the cutting-edge tools to unveil the AD pathogenesis at molecular and atomic level.
Method: In order to gain the comprehensive information about AD pathology at molecular level, postmortem brain sections of AD patients were analyzed by the hybrid molecular imaging methods composed of the conventional histological analyses, matrix assisted laser desorption ionization mass spectrometry imaging (MALDI-MSI) for small molecules, laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) imaging for metals, and particle induced X-ray emission (PIXE) imaging for elements.
Detection of Lip, Tongue, Masseter, and Temporalis Muscle Contractions with Electromyography Tools as an Early Diagnostic Medium for Dentoalveolar Malocclusion.
Eur J Dent
December 2024
Department of Pediatric Dentistry, Faculty of Dentistry, Hasanuddin University, Makassar, Indonesia.
Objectives: This study aims to detect early class I, II, and III malocclusions through the muscle strength of the lips, tongue, masseter, and temporalis.
Materials And Methods: The study subjects were 30 pediatric patients with predetermined criteria. The subjects were divided into class I, II, and III malocclusions where each classification of malocclusion amounted to 10 people.
Want 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!