Article
Engineering, Electrical & Electronic
Madoka Ono
Summary: Recent studies have shown that reducing voids in silica glass through high pressure treatment can significantly decrease optical losses. Modeling predicts further reduction in losses due to the optimization of the glass network under high compressive pressures.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Chemistry, Physical
Quan Xue, Zhong Lan, Wen Li, Fangying Chen, Rongfu Wen, Xuehu Ma, Zongchang Zhao
Summary: This paper investigates the transition state characteristics and microscopic evolution mechanism of the vapor water aggregate into liquid water near the subcooling wall through Rayleigh scattering light intensity measurement. Experimental analysis reveals different characteristics in clusters distribution layers near the condensation wall, especially a relatively stable cluster diffusion region formed by same-sizes clusters layer.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Nikolai Kozlov, Elena Mosheva
Summary: This study focuses on the investigation of chemoconvection in a two-layer miscible system under the influence of vertical vibrations. The convective-controlled regime is characterized by the development of a density wave and vigorous convection, leading to a higher reaction rate compared to the diffusive-controlled regime. The study demonstrates that vibrations result in a deceleration of convection, dependent on the magnitude of vibrational acceleration and initial concentrations of the reagents. Analysis of system behavior based on dimensionless parameters is conducted, and it is shown that the theory of thermal vibrational convection is applicable for reacting systems on quasi-steady time intervals.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Hui Chen, Celine Montanari, Ravi Shanker, Saulius Marcinkevicius, Lars A. Berglund, Ilya Sychugov
Summary: Transparent wood (TW), as an emerging biocomposite, combines optical functionality with structural properties of wood. However, the complex optical response of hierarchical materials hinders their direct study and control, making a detailed understanding of light-material interaction mechanisms necessary for achieving optically clear wood.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Mechanics
Dongpu Wang, Shuang Liu, Quan Zhou, Chao Sun
Summary: In this study, power spectra and structure functions (SFs) of the temperature and radial velocity fields in annular centrifugal Rayleigh-Benard convection (ACRBC) were analyzed. The results showed that both the energy spectrum and thermal spectrum exhibited Bolgiano and Obukhov-like scalings. These scalings became wider as the Rayleigh number increased.
Article
Food Science & Technology
Artur Wiktor, Oleksii Parniakov, Stefan Toepfl, Dorota Witrowa-Rajchert, Volker Heinz, Sergiy Smetana
Summary: The study found that PEF pre-treatment helps accelerate drying process and preserve bioactive compounds. Lower energy consumption, especially for carotenoids preservation in dried carrots, was demonstrated for CD and MW-CD technologies considering the preservation of bioactive compounds.
INNOVATIVE FOOD SCIENCE & EMERGING TECHNOLOGIES
(2021)
Article
Chemistry, Physical
Sadman Shakib, Benoit Rogez, Samira Khadir, Julien Polleux, Alois Wurger, Guillaume Baffou
Summary: Thermophoresis refers to the motion of particles along temperature gradients, which can be crucial in applications involving nano- and microscale heating. Recent studies have observed significant thermophoresis in nanoplasmonic applications and introduced a novel method for quantifying this effect.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Engineering, Electrical & Electronic
Pedro Tovar, Bismarck Costa Lima, Jean Pierre von der Weid
Summary: This work thoroughly analyzes the intensity fluctuations of Rayleigh backscattered coherent light in single mode optical fibers. A theoretical model is developed based on the intermediate range order of silica glasses and the residual stress of optical fibers to calculate the intensity fluctuations in the optical frequency domain. The comparison between numerical simulation results and experimental results in the time domain supports the conclusion that Rayleigh backscattering in single mode fibers is an ergodic process exhibiting ergodicity in the time-frequency sense, allowing the model to determine the statistical behavior of the backscattered intensity fading.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Valerii Matveenko, Natalia Kosheleva, Grigorii Serovaev, Andrey Fedorov
Summary: This article discusses the results of measuring gradient strain fields using embedded or mounted point fiber-optic sensors based on Bragg gratings and distributed fiber-optic sensors based on Rayleigh scattering. Along with the experiments, numerical modeling results of strain measurement errors associated with assumptions of uniaxial stress state and distributed fiber-optic sensor gage length are presented. Experimental results are provided for 3D printed samples and samples made of polymer composite material. Good agreement is demonstrated between numerical results and experimental data in areas where the derivative of the strain distribution function keeps a sign, while an increase in strain measurement errors by distributed fiber-optic sensors is observed in areas where this derivative changes sign.
Article
Chemistry, Physical
Mary T. Ajide, Niall J. English
Summary: This study uses non-equilibrium molecular dynamics simulation to investigate the response of water molecules to external electric fields and temperature changes. The results reveal intriguing anomalies in water structure, interaction, dynamics, and hydrogen bond kinetics.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Inorganic & Nuclear
Esra Cinan, Demet Yilmaz
Summary: In this study, effective atomic numbers of various boron compounds were measured using gamma rays and theoretically calculated with good agreement. A calibration curve was obtained for qualitative analysis of compounds within a certain range of effective atomic numbers.
APPLIED RADIATION AND ISOTOPES
(2021)
Article
Food Science & Technology
Neus Ricos-Munoz, Alejandro Rivas Soler, Juan Manuel Castagnini, Raul Moral, Francisco J. Barba, Maria Consuelo Pina-Perez
Summary: This study aimed to investigate the nutrition, antioxidant capacity, and growth-stimulating capability of different extracts from Chlorella vulgaris and Arthrospira platensis using conventional aqueous extraction and pulsed electric field (PEF) extraction technology. The results showed that PEF technology significantly improved the nutritional profile of Chlorella and Spirulina extracts, with higher values in carbohydrates, pigments, and total antioxidant capacity. In addition, the PEF extract from Spirulina showed a growth-stimulating capability for Lactobacillus rhamnosus and had a metabolomic profile rich in bioactive short chain fatty acids and organic acids. This study highlights the potential of PEF extraction technology to enhance the nutritional and functional properties of microalgae and cyanobacterial-derived ingredients.
INNOVATIVE FOOD SCIENCE & EMERGING TECHNOLOGIES
(2023)
Article
Food Science & Technology
Lilia Neri, Marianna Giancaterino, Rachele Rocchi, Urszula Tylewicz, Luca Valbonetti, Marco Faieta, Paola Pittia
Summary: This study investigated the effects of Pulsed Electric Fields (PEF) as a pre-treatment for hot air drying of saffron. PEF was found to decrease flavor, aroma, and color strength of saffron stigmas initially, but after 3 months of aging, the quality properties of PEF-treated stigmas were similar to untreated stigmas. PEF negatively impacted the crocins ratio and showed poor correlation with color strength, while also influencing total polyphenol content and antioxidant activity of saffron stigmas.
INNOVATIVE FOOD SCIENCE & EMERGING TECHNOLOGIES
(2021)
Review
Food Science & Technology
M. Morales-de la Pena, L. M. Rabago-Panduro, R. Soliva-Fortuny, O. Martin-Belloso, J. Welti-Chanes
Summary: Numerous research studies have shown that pulsed electric fields (PEF) technology is feasible for obtaining safe and high-quality foods with significant health-related compounds. PEF can be used as a preservation process or to enhance the characteristics of final products, improving efficiency and retaining valuable compounds. Challenges and opportunities for industrial implementation are discussed.
FOOD ENGINEERING REVIEWS
(2021)
Article
Food Science & Technology
Gloria Lopez-Gamez, Pedro Elez-Martinez, Olga Martin-Belloso, Robert Soliva-Fortuny
Summary: Applying pulsed electric fields (PEF) to carrots can increase phenolic and carotenoid bioaccessibility in derived products. Carrot juices had the highest carotenoid and phenolic contents, but derivatives of caffeic and coumaric acid were sensitive to PEF. Juice bioaccessibility reached 100% in purees from PEF-treated carrots, while oil-added purees with thermal treatment exhibited the highest carotenoid bioaccessibility.
