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Journal articles on the topic 'Chemical clocks'

Author: Grafiati

Published: 10 March 2023

Last updated: 31 July 2025

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1

McEwen, J. S., P. Gaspard, T. V. de Bocarme, and N. Kruse. "Nanometric chemical clocks." Proceedings of the National Academy of Sciences 106, no. 9 (2009): 3006–10. http://dx.doi.org/10.1073/pnas.0811941106.

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2

Okamoto-Uchida, Yoshimi, Akari Nishimura, Junko Izawa, Atsuhiko Hattori, Nobuo Suzuki, and Jun Hirayama. "The Use of Chemical Compounds to Identify the Regulatory Mechanisms of Vertebrate Circadian Clocks." Current Drug Targets 21, no. 5 (2020): 425–32. http://dx.doi.org/10.2174/1389450120666190926143120.

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Circadian clocks are intrinsic, time-tracking processes that confer a survival advantage on an organism. Under natural conditions, they follow approximately a 24-h day, modulated by environmental time cues, such as light, to maximize an organism’s physiological efficiency. The exact timing of this rhythm is established by cell-autonomous oscillators called cellular clocks, which are controlled by transcription–translation negative feedback loops. Studies of cell-based systems and wholeanimal models have utilized a pharmacological approach in which chemical compounds are used to identify molecu

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3

Wilhelm, Stefan, and Otto S. Wolfbeis. "Opto-chemical micro-capillary clocks." Microchimica Acta 171, no. 3-4 (2010): 211–16. http://dx.doi.org/10.1007/s00604-010-0456-4.

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Uehara, Takahiro N., Yoshiyuki Mizutani, Keiko Kuwata, et al. "Casein kinase 1 family regulates PRR5 and TOC1 in the Arabidopsis circadian clock." Proceedings of the National Academy of Sciences 116, no. 23 (2019): 11528–36. http://dx.doi.org/10.1073/pnas.1903357116.

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The circadian clock provides organisms with the ability to adapt to daily and seasonal cycles. Eukaryotic clocks mostly rely on lineage-specific transcriptional-translational feedback loops (TTFLs). Posttranslational modifications are also crucial for clock functions in fungi and animals, but the posttranslational modifications that affect the plant clock are less understood. Here, using chemical biology strategies, we show that the Arabidopsis CASEIN KINASE 1 LIKE (CKL) family is involved in posttranslational modification in the plant clock. Chemical screening demonstrated that an animal CDC7

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5

Harms, A. A., and O. E. Hileman. "Chemical clocks, feedback, and nonlinear behavior." American Journal of Physics 53, no. 6 (1985): 578. http://dx.doi.org/10.1119/1.14242.

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6

Andrieux, David, and Pierre Gaspard. "Fluctuation theorem and mesoscopic chemical clocks." Journal of Chemical Physics 128, no. 15 (2008): 154506. http://dx.doi.org/10.1063/1.2894475.

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7

Gaspard, Pierre. "The correlation time of mesoscopic chemical clocks." Journal of Chemical Physics 117, no. 19 (2002): 8905–16. http://dx.doi.org/10.1063/1.1513461.

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8

Espinoza-Rojas, Francisca, Julio Chanamé, Paula Jofré, and Laia Casamiquela. "The Consistency of Chemical Clocks among Coeval Stars." Astrophysical Journal 920, no. 2 (2021): 94. http://dx.doi.org/10.3847/1538-4357/ac15fd.

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9

Moya, A., L. M. Sarro, E. Delgado-Mena, W. J. Chaplin, V. Adibekyan, and S. Blanco-Cuaresma. "Stellar dating using chemical clocks and Bayesian inference." Astronomy & Astrophysics 660 (April 2022): A15. http://dx.doi.org/10.1051/0004-6361/202141125.

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Context. Dating stars is a major challenge with a deep impact on many astrophysical fields. One of the most promising techniques for this is using chemical abundances. Recent space- and ground-based facilities have improved the quantity of stars with accurate observations. This has opened the door for using Bayesian inference tools to maximise the information we can extract from them. Aims. Our aim is to present accurate and reliable stellar age estimates of FGK stars using chemical abundances and stellar parameters. Methods. We used one of the most flexible Bayesian inference techniques (hier

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10

Panzarasa, Guido, and Eric R. Dufresne. "Temporal Control of Soft Materials with Chemical Clocks." CHIMIA International Journal for Chemistry 74, no. 7 (2020): 612. http://dx.doi.org/10.2533/chimia.2020.612.

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11

Allen, V., F. F. S. van der Tak, and C. Walsh. "Complex cyanides as chemical clocks in hot cores." Astronomy & Astrophysics 616 (August 2018): A67. http://dx.doi.org/10.1051/0004-6361/201732553.

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Context. In the high-mass star-forming region G35.20−0.74N, small scale (~800 AU) chemical segregation has been observed in which complex organic molecules containing the CN group are located in a small location (toward continuum peak B3) within an apparently coherently rotating structure. Aims. We aim to determine the physical origin of the large abundance difference (~4 orders of magnitude) in complex cyanides within G35.20−0.74 B, and we explore variations in age, gas/dust temperature, and gas density. Methods. We performed gas-grain astrochemical modeling experiments with exponentially inc

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12

Johnson-Buck, Alexander, and William M. Shih. "Single-Molecule Clocks Controlled by Serial Chemical Reactions." Nano Letters 17, no. 12 (2017): 7940–44. http://dx.doi.org/10.1021/acs.nanolett.7b04336.

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13

Marsland, Robert, Wenping Cui, and Jordan M. Horowitz. "The thermodynamic uncertainty relation in biochemical oscillations." Journal of The Royal Society Interface 16, no. 154 (2019): 20190098. http://dx.doi.org/10.1098/rsif.2019.0098.

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Living systems regulate many aspects of their behaviour through periodic oscillations of molecular concentrations, which function as ‘biochemical clocks.’ The chemical reactions that drive these clocks are intrinsically stochastic at the molecular level, so that the duration of a full oscillation cycle is subject to random fluctuations. Their success in carrying out their biological function is thought to depend on the degree to which these fluctuations in the cycle period can be suppressed. Biochemical oscillators also require a constant supply of free energy in order to break detailed balanc

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14

Mena, E. Delgado, A. Moya, V. Adibekyan, et al. "Abundance to age ratios in the HARPS-GTO sample with Gaia DR2." Astronomy & Astrophysics 624 (April 2019): A78. http://dx.doi.org/10.1051/0004-6361/201834783.

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Aims. The purpose of this work is to evaluate how several elements produced by different nucleosynthesis processes behave with stellar age and provide empirical relations to derive stellar ages from chemical abundances. Methods. We derived different sets of ages using Padova and Yonsei–Yale isochrones and HIPPARCOS and Gaia parallaxes for a sample of more than 1000 FGK dwarf stars for which he have high-resolution (R ~ 115 000) and high-quality spectra from the HARPS-GTO program. We analyzed the temporal evolution of different abundance ratios to find the best chemical clocks. We applied multi

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15

Rosenblum, Michael, and Arkady Pikovsky. "Synchronization: From pendulum clocks to chaotic lasers and chemical oscillators." Contemporary Physics 44, no. 5 (2003): 401–16. http://dx.doi.org/10.1080/00107510310001603129.

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16

d'Eysmond, Thomas, Alessandro De Simone, and Felix Naef. "Analysis of precision in chemical oscillators: implications for circadian clocks." Physical Biology 10, no. 5 (2013): 056005. http://dx.doi.org/10.1088/1478-3975/10/5/056005.

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17

Buckle, J. V., and G. A. Fuller. "Sulphur-bearing species as chemical clocks for low mass protostars?" Astronomy & Astrophysics 399, no. 2 (2003): 567–81. http://dx.doi.org/10.1051/0004-6361:20021816.

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18

Uehara, Takahiro N., Takashi Nonoyama, Kyomi Taki, et al. "Phosphorylation of RNA Polymerase II by CDKC;2 Maintains the Arabidopsis Circadian Clock Period." Plant and Cell Physiology 63, no. 4 (2022): 450–62. http://dx.doi.org/10.1093/pcp/pcac011.

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Abstract The circadian clock is an internal timekeeping system that governs about 24 h biological rhythms of a broad range of developmental and metabolic activities. The clocks in eukaryotes are thought to rely on lineage-specific transcriptional–translational feedback loops. However, the mechanisms underlying the basic transcriptional regulation events for clock function have not yet been fully explored. Here, through a combination of chemical biology and genetic approaches, we demonstrate that phosphorylation of RNA polymerase II by CYCLIN DEPENDENT KINASE C; 2 (CDKC;2) is required for maint

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19

Asokan, Shimmi, K. H. Kochaleema, and G. Santhosh Kumar. "Formal Modelling and Verification of the Clock Synchronization Algorithm of FlexRay." Defence Science Journal 73, no. 1 (2023): 41–50. http://dx.doi.org/10.14429/dsj.73.18449.

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    The hundreds of electronic control devices used in an automotive system can effectively communicate with one another, thanks to an in-vehicle network (IVN) like FlexRay. Even though every node in the network will be running on its local clock, a global notion of time is essential. The clock synchronisation algorithm accomplishes this global time between the nodes in FlexRay. In this era of self-driving cars, the vehicle’s safety is paramount. For the vehicle to operate safely and smoothly, timely communication of information is critical, and the clock synchronisatio

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20

Wakelam, V., P. Caselli, C. Ceccarelli, E. Herbst, and A. Castets. "Resetting chemical clocks of hot cores based on S-bearing molecules." Astronomy & Astrophysics 422, no. 1 (2004): 159–69. http://dx.doi.org/10.1051/0004-6361:20047186.

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21

Tian, Yonggang, and Dekui Zhang. "Biological Clock and Inflammatory Bowel Disease Review: From the Standpoint of the Intestinal Barrier." Gastroenterology Research and Practice 2022 (March 14, 2022): 1–11. http://dx.doi.org/10.1155/2022/2939921.

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Inflammatory bowel disease is a group of chronic, recurrent, nonspecific inflammatory diseases of the intestine that severely affect the quality of life of patients. The pathogenesis of this disease is caused by complex and interactive neural networks composed of factors such as genetic susceptibility, external environment, immune disorders, and intestinal barrier dysfunction. It is well known that there is a strong link between environmental stressors (also known as circadian clocks) that can influence circadian changes and inflammatory bowel disease. Among them, the biological clock is invol

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22

Prabhu, Gurpur Rakesh D., Henryk A. Witek, and Pawel L. Urban. "Chemical clocks, oscillations, and other temporal effects in analytical chemistry: oddity or viable approach?" Analyst 143, no. 15 (2018): 3514–25. http://dx.doi.org/10.1039/c7an01926b.

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23

Steinbock, Oliver, and Petteri Kettunen. "Chemical clocks on the basis of rotating waves. Measuring irrational numbers from period ratios." Chemical Physics Letters 251, no. 5-6 (1996): 305–8. http://dx.doi.org/10.1016/0009-2614(96)00099-1.

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24

Wang, Xuelei, Mao Ye, Fei Lu, Yunkai Mao, Hao Tian, and Jianli Li. "Recent Progress on Micro-Fabricated Alkali Metal Vapor Cells." Biosensors 12, no. 3 (2022): 165. http://dx.doi.org/10.3390/bios12030165.

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Alkali vapor cells are the core components of atomic sensing instruments such as atomic gyroscopes, atomic magnetometers, atomic clocks, etc. Emerging integrated atomic sensing devices require high-performance miniaturized alkali vapor cells, especially micro-fabricated vapor cells. In this review, bonding methods for vapor cells of this kind are summarized in detail, including anodic bonding, sacrificial micro-channel bonding, and metal thermocompression bonding. Compared with traditional through-lighting schemes, researchers have developed novel methods for micro-fabricated vapor cells under

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25

Dulieu, O., and S. Willitsch. "Ion Coulomb crystals: from quantum technology to chemistry close to the absolute zero point." Europhysics News 48, no. 2 (2017): 17–20. http://dx.doi.org/10.1051/epn/2017203.

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Ion Coulomb crystals are ordered structures of atomic or molecular ions stored in ion traps at temperatures close to the absolute zero point. These unusual “crystals” form the basis of extremely accurate clocks, provide an environment for precise studies of chemical reactions and enable advanced implementations of the technology for a quantum computer. In this article, we discuss the techniques for generating atomic and molecular Coulomb crystals and highlight some of their applications.

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26

Chen, Z., S. H. Yoo, Y. S. Park, et al. "Identification of diverse modulators of central and peripheral circadian clocks by high-throughput chemical screening." Proceedings of the National Academy of Sciences 109, no. 1 (2011): 101–6. http://dx.doi.org/10.1073/pnas.1118034108.

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27

Skúladóttir, Á., C. J. Hansen, S. Salvadori, and A. Choplin. "Neutron-capture elements in dwarf galaxies." Astronomy & Astrophysics 631 (November 2019): A171. http://dx.doi.org/10.1051/0004-6361/201936125.

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The heavy elements (Z > 30) are created in neutron (n)-capture processes that are predicted to happen at vastly different nucleosynthetic sites. To study these processes in an environment different from the Milky Way, we targeted the n-capture elements in red giant branch stars in the Sculptor dwarf spheroidal galaxy. Using ESO VLT/FLAMES spectra, we measured the chemical abundances of Y, Ba, La, Nd, and Eu in 98 stars covering the metalliticy range −2.4 < [Fe/H] < −0.9. This is the first paper in a series about the n-capture elements in dwarf galaxies, and here we focus on the relati

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28

Osypova, Alina, Matthias Dübner, and Guido Panzarasa. "Oscillating Reactions Meet Polymers at Interfaces." Materials 13, no. 13 (2020): 2957. http://dx.doi.org/10.3390/ma13132957.

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Chemo-mechanical phenomena, including oscillations and peristaltic motions, are widespread in nature—just think of heartbeats—thanks to the ability of living organisms to convert directly chemical energy into mechanical work. Their imitation with artificial systems is still an open challenge. Chemical clocks and oscillators (such as the popular Belousov–Zhabotinsky (BZ) reaction) are reaction networks characterized by the emergence of peculiar spatiotemporal dynamics. Their application to polymers at interfaces (grafted chains, layer-by-layer assemblies, and polymer brushes) offers great oppor

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29

Malloy, Jaclyn N., Jiffin K. Paulose, Ye Li, and Vincent M. Cassone. "Circadian rhythms of gastrointestinal function are regulated by both central and peripheral oscillators." American Journal of Physiology-Gastrointestinal and Liver Physiology 303, no. 4 (2012): G461—G473. http://dx.doi.org/10.1152/ajpgi.00369.2011.

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Circadian clocks are responsible for daily rhythms in a wide array of processes, including gastrointestinal (GI) function. These are vital for normal digestive rhythms and overall health. Previous studies demonstrated circadian clocks within the cells of GI tissue. The present study examines the roles played by the suprachiasmatic nuclei (SCN), master circadian pacemaker for overt circadian rhythms, and the sympathetic nervous system in regulation of circadian GI rhythms in the mouse Mus musculus . Surgical ablation of the SCN abolishes circadian locomotor, feeding, and stool output rhythms wh

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30

LaFreniere, Benjamin R., Briony Donahue, Jillian E. Price, et al. "Chemical clocks: using otolith geochemistry to enhance estimation of age and growth of white hake (Urophycis tenuis)." Fishery Bulletin 122, no. 1-2 (2024): 44–57. http://dx.doi.org/10.7755/fb.122.1-2.4.

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31

Mackenzie, Dana. "Time Gets More Precise with Transportable Optical Lattice Clocks." Engineering 6, no. 11 (2020): 1210–11. http://dx.doi.org/10.1016/j.eng.2020.08.008.

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32

Rawlings, J. M. C., E. Keto, and P. Caselli. "Quasi-equilibrium chemical evolution in starless cores." Monthly Notices of the Royal Astronomical Society 530, no. 4 (2024): 3986–4003. http://dx.doi.org/10.1093/mnras/stae1108.

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ABSTRACT The chemistry of H2O, CO, and other small molecular species in an isolated pre-stellar core, L1544, has been assessed in the context of a comprehensive gas-grain chemical model, coupled to an empirically constrained physical/dynamical model. Our main findings are (i) that the chemical network remains in near equilibrium as the core evolves towards star formation and the molecular abundances change in response to the evolving physical conditions. The gas-phase abundances at any time can be calculated accurately with equilibrium chemistry, and the concept of chemical clocks is meaningle

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33

Breen, Shari L., and Simon P. Ellingsen. "Masers as evolutionary tracers of high-mass star formation." Proceedings of the International Astronomical Union 8, S287 (2012): 156–60. http://dx.doi.org/10.1017/s1743921312006837.

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AbstractDetermining an evolutionary clock for high-mass star formation is an important step towards realising a unified theory of star formation, as it will enable qualitative studies of the associated high-mass stars to be executed. We have carried out detailed studies of a large number of sources suspected of undergoing high-mass star formation and have found that common maser transitions offer the best opportunity to determine an evolutionary scheme for these objects. We have investigated the relative evolutionary phases of massive star formation associated with the presence or absence of c

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34

Tiemei, Chen. "Book Review: Age determination of young rocks and artifacts: physical and chemical clocks in Quaternary geology and archaeology." Holocene 9, no. 3 (1999): 379. http://dx.doi.org/10.1177/095968369900900315.

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35

Casali, G., L. Spina, L. Magrini, et al. "The Gaia-ESO survey: the non-universality of the age–chemical-clocks–metallicity relations in the Galactic disc." Astronomy & Astrophysics 639 (July 2020): A127. http://dx.doi.org/10.1051/0004-6361/202038055.

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Context. In the era of large spectroscopic surveys, massive databases of high-quality spectra coupled with the products of the Gaia satellite provide tools to outline a new picture of our Galaxy. In this framework, an important piece of information is provided by our ability to infer stellar ages, and consequently to sketch a Galactic timeline. Aims. We aim to provide empirical relations between stellar ages and abundance ratios for a sample of stars with very similar stellar parameters to those of the Sun, namely the so-called solar-like stars. We investigate the dependence on metallicity, an

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36

Farooq, Muhammad Umer, Atiq ur Rehman, Tabarek Qasim Ibrahim, Muhammad Hussain, Ali Hasan Ali, and Badr Rashwani. "Metric Dimension of Line Graphs of Bakelite and Subdivided Bakelite Network." Discrete Dynamics in Nature and Society 2023 (August 16, 2023): 1–6. http://dx.doi.org/10.1155/2023/7656214.

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Graph theory is considered one of the major subjects, and it also plays a significant role in the digital world. It has numerous uses in computer science, robot navigation, and chemistry. Graph theory is employed in forming the structures of different chemical networks, locating robots on a network, and troubleshooting computer networks. Additionally, it finds applications in scheduling airplanes and studying diffusion mechanisms. The current work investigates the metric dimension of the line graphs of the Bakelite and subdivided Bakelite networks. The results prove that these families of grap

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37

Amaike, Kazuma, Tsuyoshi Oshima, Nicola Stephanie Skoulding, Yoshifumi Toyama, Tsuyoshi Hirota, and Kenichiro Itami. "Small Molecules Modulating Mammalian Biological Clocks: Exciting New Opportunities for Synthetic Chemistry." Chem 6, no. 9 (2020): 2186–98. http://dx.doi.org/10.1016/j.chempr.2020.08.011.

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38

Guo, Ping, Hongling Meng, Lin Dan, and Jianye Zhao. "Wafer-Level Filling of MEMS Vapor Cells Based on Chemical Reaction and Evaporation." Micromachines 13, no. 2 (2022): 217. http://dx.doi.org/10.3390/mi13020217.

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Micro-electro-mechanical system (MEMS) vapor cells are key components for sensors such as chip-scale atomic clocks (CSACs) and magnetometers (CSAMs). Many approaches have been proposed to fabricate MEMS vapor cells. In this article, we propose a new method to fabricate wafer-level filling of MEMS vapor cells based on chemical reaction and evaporation. The Cs metals are firstly obtained through the chemical reaction between cesium chloride and barium azide in a reservoir baseplate. Then, the Cs metals are evaporated to the preform through the microchannel plate and condensed on the inner glass

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39

Titarenko, A., A. Recio-Blanco, P. de Laverny, M. Hayden, G. Guiglion, and C. Worley. "[Y/Mg] stellar dating calibration." Proceedings of the International Astronomical Union 12, S330 (2017): 267–68. http://dx.doi.org/10.1017/s1743921317006780.

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AbstractGaia DR1 has opened a new era of stellar age dating, that is crucial for many astrophysical objectives. In addition, the Gaia based isochrone fitting ages can be compared to other chemical clocks like the [Y/Mg] one (Nissen et al. 2015). In our work we have used ESO archived data of the AMBRE project (de Laverny et al. 2013) for UVES spectra, in order to evaluate the age [Y/Mg] abundance correlation for turn off stars. 310 turn off stars of the UVES-archive (setups 564 and 580) are included in the TGAS database. Isochrone fitting ages were derived. We have applied the GAUGUIN procedure

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40

Johnson, William C. "Chronometric dating in archaeology; Age determination of young rocks and artifacts: Physical and chemical clocks in quaternary geology and archaeology." Geoarchaeology 14, no. 7 (1999): 719–24. http://dx.doi.org/10.1002/(sici)1520-6548(199910)14:7<719::aid-gea7>3.0.co;2-z.

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41

Zhang, Guo-Yin, Jin-Long Xu, A. I. Vasyunin, et al. "Physical properties and chemical composition of the cores in the California molecular cloud." Astronomy & Astrophysics 620 (December 2018): A163. http://dx.doi.org/10.1051/0004-6361/201833622.

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Aims. We aim to reveal the physical properties and chemical composition of the cores in the California molecular cloud (CMC), so as to better understand the initial conditions of star formation. Methods. We made a high-resolution column density map (18.2′′) with Herschel data, and extracted a complete sample of the cores in the CMC with the fellwalker algorithm. We performed new single-pointing observations of molecular lines near 90 GHz with the IRAM 30m telescope along the main filament of the CMC. In addition, we also performed a numerical modeling of chemical evolution for the cores under

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42

Sales-Silva, J. V., S. Daflon, K. Cunha, et al. "Exploring the S-process History in the Galactic Disk: Cerium Abundances and Gradients in Open Clusters from the OCCAM/APOGEE Sample." Astrophysical Journal 926, no. 2 (2022): 154. http://dx.doi.org/10.3847/1538-4357/ac4254.

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Abstract The APOGEE Open Cluster Chemical Abundances and Mapping survey is used to probe the chemical evolution of the s-process element cerium in the Galactic disk. Cerium abundances were derived from measurements of Ce ii lines in the APOGEE spectra using the Brussels Automatic Code for Characterizing High Accuracy Spectra in 218 stars belonging to 42 open clusters. Our results indicate that, in general, for ages < 4 Gyr, younger open clusters have higher [Ce/Fe] and [Ce/α-element] ratios than older clusters. In addition, metallicity segregates open clusters in the [Ce/X]–age plane (where

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43

Gedela, Ravi. "A ROLE OF ENVIRONMENTAL FACTORS ON CALCIUM SIGNALING GENES IN NEUROSPORA CRASSA." JOURNAL OF ADVANCES IN BIOTECHNOLOGY 5, no. 3 (2015): 699–710. http://dx.doi.org/10.24297/jbt.v5i3.4833.

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Â Neurospora crassa possesses a complex of Ca2+_signaling system consisting of 48 Ca2+-signaling proteins.Â The Ca+2-signallingÂ protein plays an important role in a range of processes such as a Ca2+ stress tolerance, hyphal tip branching growth, cytoskeletal organization, cell cycle progression, circadian clocks, sporulation, sexual development, and ultraviolet (uv) survival.Â The environmental factors, broadly defined to include chemical, physical, nutritional, and behavioral factors...etc.Â In this article, we are reporting here a role of physic-chemical environmental factors pH, glucose an

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44

Galarza, Jhon Yana, Diego Lorenzo-Oliveira, Thiago Ferreira, et al. "HIP 8522: A Puzzling Young Solar Twin with the Lowest Detected Lithium Abundance*." Astrophysical Journal 983, no. 1 (2025): 70. https://doi.org/10.3847/1538-4357/adb57b.

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Abstract We present HIP 8522, a young solar twin with the lowest detected lithium abundance, potentially a field blue straggler or the result of episodic early accretion. Its stellar parameters (T eff = 5729 ± 7 K, log g = 4.532 ± 0.016 dex, [Fe/H] = 0.005 ± 0.010 dex, and v t = 1.08 ± 0.02 km s−1) and chemical composition were determined via spectroscopic equilibrium using high-resolution spectra (R = 60,000–165,000). The age of HIP 8522 was estimated to have an upper limit of <1 Gyr through isochrone fitting and was further confirmed using chemical clocks. Spectral synthesis of the lithiu

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45

Naseem, Majid, Sadia Anjum, Saima Saima, et al. "Current Advances with Potential Role of Nanotechnology in Generation of Fuel Cells and Solar Cell Batteries." Scholars Bulletin 10, no. 04 (2024): 136–42. http://dx.doi.org/10.36348/sb.2024.v10i04.004.

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Batteries are becoming an essential component of many different applications, such as memory backup, clocks, calculators, lighting, portable electronic devices, and photographic equipment, advancements in the electronics sector. Pure metal nanoparticles can be created either destructively or constructively using metal precursors. Because of the plasma resonance feature, it has special opto-electrical properties. Size, shape, and fact govern the metal nanoparticles replicate. Silver, gold, iron, cobalt, zinc, copper, and cadmium nanoparticles are the most prevalent metal nanoparticles. The elec

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46

Schwarz, Ernst von. "Algorithms to Ageless: AI in Anti-Aging Medicine." Clinical Cardiology and Cardiovascular Interventions 8, no. 5 (2025): 01–07. https://doi.org/10.31579/2641-0419/462.

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The adoption of artificial intelligence (AI) in medicine in general and in scientific anti-aging efforts in particular represents a new era of research, diagnostics, and therapy. We here review and discuss the AI-driven methodologies that accelerate the identification of therapeutic targets, predictive biomarkers, and precision-driven interventions, as well as recent breakthroughs, including the application of deep learning (DL) algorithms to screen large chemical libraries, leading to the discovery of senolytic compounds that selectively eliminate aging cells. AI-powered biological aging cloc

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Gerasimov, Roman, Adam J. Burgasser, Derek Homeier та ін. "The HST Large Program on ω Centauri. V. Exploring the Ultracool Dwarf Population with Stellar Atmosphere and Evolutionary Modeling". Astrophysical Journal 930, № 1 (2022): 24. http://dx.doi.org/10.3847/1538-4357/ac61e5.

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Abstract Brown dwarfs can serve as both clocks and chemical tracers of the evolutionary history of the Milky Way due to their continuous cooling and high sensitivity of spectra to composition. We focus on brown dwarfs in globular clusters that host some of the oldest coeval populations in the galaxy. Currently, no brown dwarfs in globular clusters have been confirmed, but they are expected to be uncovered with advanced observational facilities such as the James Webb Space Telescope (JWST). In this paper we present a new set of stellar models specifically designed to investigate low-mass stars

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Stávek, Jiří. "A New Interpretation of Contributions Presented at the Solvay Conference 1911. Can We Falsify the “Geocentric” Foundations of Quantum Mechanics in the Solar System?" European Journal of Applied Physics 3, no. 6 (2021): 61–65. http://dx.doi.org/10.24018/ejphysics.2021.3.6.135.

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We have studied the contributions and presentations published in the Proceedings of the Solvay Conference 1911. Based on the lecture of Ernest Solvay on the “gravito-matérialitique” we can distinguish two features of the Earth´s gravitational field – 1. “gravité réelle” described by the Newton´s gravitational law and 2. “gravité potentielle” acting as an agent of the self-organization on quantum particles and creating structures described by the Planck constant hEARTH. From the discussions followed after the presentations of Walther Nernst and Albert Einstein we interpreted the Nernst- Lindema

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Breen, S. L., and S. P. Ellingsen. "An evolutionary sequence for high-mass star formation." Proceedings of the International Astronomical Union 8, S292 (2012): 39. http://dx.doi.org/10.1017/s1743921313000203.

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AbstractDetermining an evolutionary clock for high-mass star formation is an important step towards realizing a unified theory of star formation, as it will enable qualitative studies of the associated high-mass stars to be executed. Our recent studies have shown that masers have great potential to accurately trace the evolution of these regions. We have investigated the relative evolutionary phases associated with the presence of combinations of water, methanol and hydroxyl masers. Comparison between the characteristics of coincident sources has revealed strong evidence for an evolutionary se

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Unosson, Måns, Marco Brancaccio, Michael Hastings, Adam M. Johansen, and Bärbel Finkenstädt. "A spatio-temporal model to reveal oscillator phenotypes in molecular clocks: Parameter estimation elucidates circadian gene transcription dynamics in single-cells." PLOS Computational Biology 17, no. 12 (2021): e1009698. http://dx.doi.org/10.1371/journal.pcbi.1009698.

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We propose a stochastic distributed delay model together with a Markov random field prior and a measurement model for bioluminescence-reporting to analyse spatio-temporal gene expression in intact networks of cells. The model describes the oscillating time evolution of molecular mRNA counts through a negative transcriptional-translational feedback loop encoded in a chemical Langevin equation with a probabilistic delay distribution. The model is extended spatially by means of a multiplicative random effects model with a first order Markov random field prior distribution. Our methodology effecti

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