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2025
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2025
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2025
Abstract
Hyperfine interactions within Fe81B12Sn7 and (Fe0.75Co0.25)81B12Sn7 metallic glasses were explored through Mössbauer spectrometry using both 57Fe and 119Sn resonant nuclei. As-quenched specimens were fabricated via planar flow casting, followed by annealing at 673 K for 30 min, coinciding with the first stage of crystallization. After annealing, presence of crystalline components was revealed in the 57Fe Mössbauer spectra. They were identified in the respective samples as bcc-Fe and bcc-FeCo phases with small inclusions of Sn. However, no traces of crystalline components were directly seen in the 119Sn spectra. Partial replacing of Fe with Co resulted in an increase of the hyperfine magnetic fields at both iron and tin probe atoms.- Book : ()
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2025
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2025
Kefir, a traditional probiotic beverage with significant cultural, social, and health relevance, has garnered increasing scientific interest for its functional properties. Here, we synthesized findings from 14 studies investigating the bacterial and fungal diversity in artisanal cow’s milk kefir through metagenomic analysis. Following the PRISMA guidelines (Preferred Reporting Items for Systematic Reviews and Meta-Analyses), a comprehensive search was conducted in databases including Portal BVS, Scopus, Scielo, and Web of Science. From an initial pool of 522 articles, 14 were selected based on stringent inclusion and exclusion criteria, focusing on English-written studies. Key terms such as “kefir milk”, “artisanal kefir”, “milk”, “metagenomics”, and “cow” were identified through Boolean searches over the last five years. This review addresses the growing need for research on the microbial diversity of artisanal cow’s milk kefir from various global regions. The results indicate a remarkable diversity in microbial communities, primarily dominated by bacteria from the phylum Firmicutes (notably Lactobacillus) and yeasts from the genera Saccharomyces and Kluyveromyces. These microbial compositions are shaped by factors such as milk type, production methods, and grain handling practices, reflecting regional adaptations and influencing kefir’s sensory, probiotic, and functional properties. We argue that a full understanding of these microbial dynamics is critical for standardizing production processes and enhancing quality control measures, ultimately ensuring artisanal kefir’s consistency and health benefits.- Book : 11(3)
- Pub. Date : 2025
- Page : pp.150-150
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2025
RELEVANCE. The Arctic zone is becoming a subject of increasing interest due to climate change and the growing need for sustainable development. The introduction of renewable energy sources is becoming key to the sustainability and security of the region. The research aimed at solving the problems of development of the Arctic zone of Russia with a focus on overcoming transportation and energy constraints and introducing renewable energy sources is highly relevant.THE PURPOSE. The study aims to develop and implement sustainable and efficient energy systems in the Arctic zone of Russia using renewable energy sources, with a focus on solar energy. To develop a simulation model of a solar array with a positioning system and demonstrate an approach to improve the efficiency of solar power plants, which is important for current technological research in renewable energy.METHODS. Collection and analysis of measured data of solar radiation values and sunshine duration in different areas of Murmansk region. To evaluate the efficiency of solar panels application, a simulation model was developed in the program complex Matlab application Simulink.RESULTS. The results of the study allowed to identify the potential of solar energy utilization in different areas of the Murmansk region. The performed calculations allowed to determine the optimal capacity of solar panels for the Khibiny mountain range, which contributes to the effective utilization of solar energy. A simulation model of a solar panel with the implementation of a battery positioning system to improve the efficiency of operation is presented.CONCLUSION. The significant potential of solar energy utilization in the Arctic zone is achieved with the help of a positioning system, which holds promise for sustainable development of the region and improved energy efficiency. Adaptation of solar power plants to specific climatic conditions optimizes their performance and ensures sustainability even in the harsh climate of northern regions- Book : 27(1)
- Pub. Date : 2025
- Page : pp.48-58
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2025
The irradiation by gamma-rays is a widely used technique for disinfection in the pharmaceutical and cosmetic industries. In view of growing concerns by consumers about this technique, further investigation of the effects of radiation is required. In this work electron paramagnetic resonance (EPR) spectroscopy was applied to study the free radicals in irradiated horse chestnut (Aesculus hippocastanum L.) seeds and to evaluate the free radical scavenging activity (FRSA) using the stable DPPH radical. In order to evaluate the antiradical potential, a spectrophotometric study was also used. The identification and quantification of some individual polyphenol compounds before and after irradiation by 1, 5, and 10 kGy gamma rays of peeled and shell seeds were obtained by high performance liquid chromatography (HPLC). The EPR spectrum recorded on irradiated horse chestnut is a typical signal for irradiated cellulose-contained substances. The results show that the signal is stable, and it can be found in the samples irradiated with a dose of 1 kGy, 45 days after treatment, whereas for samples irradiated by 5 and 10 kGy, it is even found 250 days later. The study showed that free radical scavenging activity increases in shell seeds, while it decreases in peeled seed extracts after irradiation depending on the dosage, which corresponds to the total phenolic content. Shell seed extracts have significantly stronger antiradical activity than that of peeled seeds. Regarding the HPLC analysis, some polyphenolics were degraded and others were formed as a result of irradiation. The irradiation by 5 kGy dosage has a most significant positive effect on the antioxidant potential of shell chestnut seeds.- Book : 15(6)
- Pub. Date : 2025
- Page : pp.3287-3287
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2025
- Book : 3()
- Pub. Date : 2025
- Page : pp.102330-102330
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2025
Nuclear medium effects on B+ meson production are studied using the binary-collision scaled cross section ratio between events of different charged-particle multiplicities from proton-lead collisions. Data, collected by the CMS experiment in 2016 at a nucleon-nucleon center-of-mass energy of sNN=8.16 TeV, corresponding to an integrated luminosity of 175 nb−1, were used. The scaling factors in the ratio are determined using a novel approach based on the Z→μ−μ+ cross sections measured in the same events. The scaled ratio for B+ is consistent with unity for all event multiplicities, putting stringent constraints on nuclear modification for heavy flavor.
© 2025 CERN, for the CMS Collaboration
2025
CERN
- Book : 134(11)
- Pub. Date : 2025
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2025
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Space infrared cameras perform non-uniformity correction of detectors through on-board calibration in orbit. Using the blackbody component inside the camera as a standard radiation source is a commonly used method. As the accuracy of calibration increases, there are also high requirements for the temperature stability and uniformity of the blackbody inside the camera. This article addresses the problem of thermal control of large-scale internal black bodies and proposes a hybrid temperature control method that relies primarily on radiation and is supplemented by thermal conduction. By modulating the thermal resistance of thermal conduction, the influence ratio of radiation and thermal conduction can be adjusted to ensure control capability while maximizing the temperature uniformity of the controlled black body. After flight verification, the blackbody temperature stability can reach ±0.1K, and the temperature uniformity can reach 0.2K, meeting the calibration accuracy requirements of remote sensing imaging. This article improves the traditional blackbody control scheme that relies solely on temperature control algorithms, introducing active and passive thermal control measures to meet the new requirements of large-scale blackbodies. The scheme adopted can provide a reference for temperature control of large-scale surface source blackbody.- Book : 2977(1)
- Pub. Date : 2025
- Page : pp.012067-012067
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