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Quantification of Viable by Propidium Monoazide Real-Time PCR After Long-Term Storage of Peanut Products.
Microorganisms
December 2024
Faculty of Food Engineering, University of Campinas, Campinas 13083-862, Brazil.
In this study, the performance of quantitative PCR, combined or not with propidium monoazide (PMA), to recover from peanut products after different storage times was evaluated. The samples were inoculated with 5-6 log cfu g of Typhimurium ATCC 14028 and stored at 28 °C for up to 540 d. The correlation between the threshold cycle number (Ct) and the colony-forming units (cfu) was obtained by a standard curve, which showed a linear correlation (R = 0.
View Article and Find Full Text PDFStructural Design and Simulation of Multi-Detector Same-Platform Laser Gyro Reflector Substrate Defect Detection Prototype.
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December 2024
University of Science and Technology of China, Hefei 230026, China.
Defect detection and classification in super-high reflector mirrors and their substrates are crucial for manufacturing laser gyroscope systems. This paper presents a prototype designed to meet the requirements for the reflection and transmission of laser gyroscope mirror substrates. The prototype featured two measurement channels (bright field and dark field) and could detect defects on patterned and unpatterned surfaces.
View Article and Find Full Text PDFExperimental Study on the Flexural Performance of Composite Beams with Lipped Channels.
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December 2024
School of & Architecture & Architectural Engineering, Hanyang University ERICA, Ansan 15588, Republic of Korea.
This study conducted experiments to investigate the flexural behavior of steel-concrete composite beams with U-shaped sections, utilizing cold-formed lipped channels as web components. To enhance both flexural and shear performance, trapezoidal plates were added to the lower sides of the composite beams. A total of ten specimens were fabricated, with variables defined according to the following criteria: presence of bottom tension reinforcement and bottom studs, thickness of the trapezoidal side plates (6 mm and 8 mm), and the welding method.
View Article and Find Full Text PDFStudy on Fatigue Behavior and Fracture Mechanism of LMD Ti-6.5Al-3.5Mo-1.5Zr-0.3Si Alloy Based on Microstructure.
Materials (Basel)
December 2024
State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, No. 127, Youyi Road (West), Xi'an 710072, China.
This study explores the fatigue behavior and fracture mechanisms of TC11 titanium alloy formed by laser metal deposition (LMD) and subjected to double annealing. The research focuses on how the alloy's unique microstructure, consisting of alternating equiaxed and columnar crystals, influences its fatigue performance. The microstructure's basket-like α' phase, made up of both plate-shaped and needle-like structures, leads to variations in crack growth behavior, as shown in the relationship between the crack growth rate and the stress intensity.
View Article and Find Full Text PDFViability and Motility of Under Elevated Martian Salt Stresses.
Life (Basel)
November 2024
Astrobiology Group, Center of Astronomy and Astrophysics, Technical University Berlin, 10623 Berlin, Germany.
This study investigates the effects of three Martian-relevant salts-sodium chlorate, sodium perchlorate, and sodium chloride-on the viability and motility of , a model organism for understanding microbial responses to environmental stress. These salts are abundant on Mars and play a crucial role in forming brines, one of the few sources of stable liquid water on the planet. We analyze the survivability under different salt concentrations using colony plating.
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