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Magnetosymbiosis discovery:new perspectives in magnetotaxis research

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Journal of Oceanology and Limnology 2025年第1期43卷 177-186页

作者： Caroline L.MONtEIL Christopher t.LEFEVRE Aix-Marseille Université CEACNRSInstitute of Biosciences and Biotechnologies of Aix-MarseilleSaint-Paul-lez-Durance 13115France

Magnetotactic bacteria have been the only known magnetoreceptive microorganisms for *** if the existence of magnetotactic protists was suggested in 1986,this is only 30 years later that magnetotaxis was extended to the domain of Eukaryota,thanks to the characterization of magnetotactic symbiotic assemblies composed of a flagellated protist and bacteria biomineralizing magnetic *** mutualistic ectosymbiosis relies on a collective magnetotaxis coupled to a hydrogen-based *** new form of cooperation challenges our view of magnetic biomineralization in prokaryotes and magnetoreception in *** this review,we present how magnetosymbiosis was discovered and how cooperation ***,we discuss the future research and the new perspectives such discovery brought to the field of magnetotaxis.

关键词： magnetotaxis biomineralization symbiosis magnetotactic

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transport mechanism in chemically reactive hybrid nanofluid flow containing gyrotactic micro-organisms over a curved oscillatory surface

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 177-192页

作者： M.NAVEED M.IMRAN t.ASGHAR Z.ABBAS Department of Mathematics Division of Science and TechnologyUniversity of Education Department of Mathematics The Islamia University of Bahawalpur

this paper examines the transport analysis, including both heat transfer and mass transfer, in hybrid nanofluid flow containing gyrotactic microorganisms towards a curved oscillatory surface. the influence of magnetic fields is also inspected in terms of their physical characteristics. to depict the phenomena of transport, modified versions of both Fick's and Fourier's laws are used. Additionally, the characteristics of both heterogeneous and homogeneous chemical reactions are also incorporated. Utilizing a curvilinear coordinate system, the flow problem is formulated as partial differential equations(PDEs)for momentum, concentration, microorganism field, and energy. An analytical solution to the obtained flow equations is achieved utilizing the homotopy analysis method(HAM).the effects of significant flow parameters on the pressure and microorganism fields, velocity, oscillation velocity, concentration, and temperature distributions are shown via graphs. Furthermore, the variations in skin friction, mass transfer rate, heat transfer rate, and local motile number due to different involved parameters are presented in tables and are analyzed in detail. Graphical results indicate that the curves of velocity and temperature fields are enhanced as the values of the solid volume fraction variables *** is also verified that the concentration rate field decreases as the values of the homogeneous reaction strength parameter and the radius of curvature parameter increase, and it increases with the Schmidt number and the heterogeneous reaction strength *** outcomes show a favorable response of the motile number to advanced values of the Peclet number, the Schmidt number, the microorganism difference parameter, and the bio-convective Lewis number.

关键词： analytical solution Cattaneo-Christov heat and mass flux chemical reaction gyrotactic microorganism hybrid nanofluid O368 oscillating curved stretchable sheet

Circadian nutrition:is meal timing an elixir for fatigue?

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Science Bulletin 2025年第3期70卷 309-312页

作者： Zhihui Zhang Lu Yan Jonas t.treebak Min-Dian Li Department of Cardiovascular Medicine Center for Circadian Metabolism and Cardiovascular DiseaseSouthwest HospitalArmy Medical UniversityChongqing 400038China Ministry of Education(MOE)Key Laboratory of Geriatric Cardiovascular and Cerebrovascular Disease Chongqing 400038China Novo Nordisk Foundation Center for Basic Metabolic Research Faculty of Health and Medical SciencesUniversity of CopenhagenCopenhagen 2200Denmark

Fatigue is increasingly prevalent in industrialized societies,highlighting an urgent need for effective clinical and lifestyle *** manifests as reduced muscle endurance,strength and a persistent sensation of exhaustio... 详细信息

关键词： fatigue strength sensation

Free vibration and transient response of double curved beams connected by intermediate straight beams

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 37-62页

作者： R.A.JAFARI-tALOOKOLAEI H.GHANDVAR E.JUMAEV S.KHAtIR t.CUONG-LE School of Mechanical Engineering Babol Noshirvani University of Technology Department of Mechanical Engineering Faculty of Engineering New Uzbekistan University University of Business and Science Center for Engineering Application and technology Solutions Ho Chi Minh City Open University

this paper investigates the free vibration and transient response of interconnected structures including double curved beams and intermediate straight beams,which are all constructed from functionally graded porous(FGP) materials. the strain potential and kinetic energies of each beam along with the work done by the external force are calculated. Additionally, a higher-order beam element is introduced to derive stiffness and mass matrices, along with the force vector. the curved and straight beams are discretized, and their assembled stiffness, mass matrices, and force vectors, are *** conditions at the joints are used to derive the total matrices of the entire structure. Subsequently, the natural frequencies and transient response of the system are determined. the accuracy of the mathematical model and the self-developed computer program is validated through the comparison of the obtained results with those of the existing literature and commercial software ANSYS, demonstrating excellent ***, a comprehensive study is conducted to investigate the effects of various parameters on the free vibration and transient response of the considered structure.

关键词： double curved beam finite element method functionally graded porous (FGP) material intermediate straight beam O313 vibration analysis

Impact of Pollutant Concentration and Particle Deposition on the Radiative Flow of Casson-Micropolar Fluid between Parallel Plates

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Computer Modeling in Engineering & Sciences 2025年第1期142卷 665-690页

作者： Ghaliah Alhamzi Badr Saad t.Alkahtani Ravi Shanker Dubey Vinutha Kalleshachar Neelima Nizampatnam Department of Mathematics and Statistics College of ScienceImam Mohammad Ibn Saud Islamic University(IMSIU)Riyadh11564Saudi Arabia Department of Mathematics College of ScienceKing Saud UniversityRiyadh11989Saudi Arabia Department of Mathematics Amity School of Applied SciencesAmity University RajasthanJaipur302002RajasthanIndia Department of Studies in Mathematics Davangere UniversityDavangere577002India Department of Electronics and Communication Engineering Amrita School of EngineeringAmrita Vishwa VidyapeethamBengaluru560035India

Assessing the behaviour and concentration of waste pollutants deposited between two parallel plates is essential for effective environmental *** the effectiveness of treatment methods in reducing pollution scales is made easier by analysing waste discharge *** waste discharge concentration analysis is useful for assessing how effectively wastewater treatment techniques reduce pollution *** study aims to explore the Casson micropolar fluid flow through two parallel plates with the influence of pollutant concentration and thermophoretic particle *** explore the mass and heat transport features,thermophoretic particle deposition and thermal radiation are *** governing equations are transformed into ordinary differential equations with the help of suitable similarity *** Runge-Kutta-Fehlberg’s fourthfifth order technique and shooting procedure are used to solve the reduced set of equations and boundary *** integration of a neural network model based on the Levenberg-Marquardt algorithm serves to improve the accuracy of predictions and optimize the analysis of *** outcomes are displayed to analyze the characteristics of the relevant dimensionless parameters in the current *** reveal that concentration upsurges as the micropolar parameter *** concentration reduces with an upsurge in the thermophoretic *** upsurge in the external pollutant source variation and the local pollutant external source parameters enhances mass *** surface drag force declines for improved values of porosity and micropolar parameters.

关键词： Micropolar fluid thermal radiation porous medium thermophoretic particle deposition waste discharge concentration

A comprehensive review of phytochemical approaches in treatment of acute myeloid leukemia:Associated pathways and molecular mechanisms

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Chinese Herbal Medicines 2025年第1期17卷 41-55页

作者： Mouvanal Sajana t.S.Gopenath Basalingappa M.Kanthesh Division of Molecular Biology School of Life SciencesJSS AHER Department of Biotechnology and Bioinformatics School of Life SciencesJSS AHER

Acute myeloid leukemia(AML) is a type of cancer that affects the blood and bone *** review conducts a thorough analysis of AML, addressing its genetic *** examination extends to the current therapeutic approaches employed for AML,shedding light on their efficacy and the notable side effects experienced by patients undergoing these treatments,leading to a low overall survival ***,exploring alternative treatments,such as phytochemicals,is ***,the review explores the complex landscape of phytochemicals,categorizing them based on their diverse properties,which include alkaloids,phenols,terpenoids,organo-sulfur compounds,and other compounds,including quinones,and elucidating their mechanisms of *** emphasis is placed on their involvement in critical signaling pathways,with a particular focus on how these phytochemicals impact AML when evaluated across a spectrum of cell *** in-depth exploration aims to uncover potential targets within the molecular landscape of AML where phytochemicals can exert their therapeutic *** review investigates the potential role of plant-derived phytochemicals as adjunctive therapies for *** exploration encompasses the identification of specific phytochemicals that exhibit promising anti-leukemic properties and evaluates their potential in clinical *** conventional treatments,the review explores the integration of complementary and alternative medicine as a holistic approach to managing *** examination encompasses the synergy between conventional therapies and alternative interventions,exploring how these combined strategies may enhance overall therapeutic outcomes and mitigate side *** a forward-looking perspective,the overarching goal is to contribute to the evolving landscape of AML treatment by considering innovative approaches that harness the therapeutic potential of phytochemicals,both independently and in conjunction with establishe

关键词： cell death complementary and alternative medicine leukemia phytochemicals signaling pathways therapeutic targets

Ecological immunology: do sexual attraction and immunity trade-off through a desaturase?

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INSECt SCIENCE 2025年第1期32卷 290-300页

作者： Gao, Ke van der Heide, Wout Muijderman, Daphne Nichols, Sarah Karwal, Carmen Kuperus, Peter Groot, Astrid t. Univ Amsterdam Inst Biodivers & Ecosyst Dynam Amsterdam Netherlands Univ Calif San Diego Dept Cell & Dev Biol La Jolla CA USA Cornell Univ Dept Neurobiol & Behav Ithaca NY USA Leiden Univ Leiden Netherlands

Given the limited availability of resources in nature, sexual attractiveness may trade off with immunocompetence, as the immunocompetence handicap hypothesis (ICHH) posits. In invertebrates, a direct link between trade-offs through hormonal/molecular effectors in sexual signals and immunity has not been found so far. Here, we assessed how variation in sexual signals affected parasite infection in two sex pheromone selected lines of the moth Chloridea virescens: an attractive line with a low ratio of 16:Ald/Z11-16:Ald and an unattractive line with a high ratio. When infecting these lines with an apicomplexan parasite, we found that the attractive Low line was significantly more susceptible to the parasite infection than the unattractive High line. Since the ratio difference between these two lines is determined by a delta-11-desturase, we hypothesized that this desaturase may have a dual role, i.e., in the quality of the sexual signal as well as an involvement in immune response, comparable to testosterone in vertebrates. However, when we used CRISPR/cas9 to knockout delta-11-desturase in the attractive Low line, we found that the pheromonal phenotype did change to that of the High line, but the infection susceptibility did not. Notably, when checking the genomic location of delta-11-desaturase in the C. virescens, we found that mucin is adjacent to delta-11-desaturase. When comparing the mucin sequences in both lines, we found four nonsynonymous SNPs in the coding sequence, as well as intronic variation between the two lines. these differences suggest that genetic hitchhiking may explain the variation in susceptibility to parasitic infection.

关键词： Chloridea virescens delta-11-desaturase ICHH parasite susceptibility sex pheromone

Branching out: Nitrogen-dependent modulation of strigolactone signaling

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Molecular Plant 2025年第1期18卷 14-16页

作者： Andrew J.tuckey Mark t.Waters School of Molecular Sciences The University of Western AustraliaPerthWA 6009Australia

Strigolactones (SLs) are carotenoid-derived plant compounds that stimulate the germination of root-parasitic weeds. Why a host plant should produce such detrimental signals remained unclear until exuded SLs were shown to also encourage symbioses with arbuscular mycorrhizal fungi. Shortly after this discovery, SLs were found to act internally as endogenous phytohormones to regulate numerous traits, most prominently shoot branching, or “tillering” in cereal crops (Gomez-Roldan et al., 2008;Umehara et al., 2008).

关键词： traits plant ).

Distributed Mallows Model Averaging for Ridge Regressions

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Acta Mathematica Sinica,English Series 2025年第2期41卷 780-826页

作者： Haili Zhang Alan t.K.Wan Kang You Guohua Zou School of Undergraduate Education Shenzhen Polytechnic University Department of Management Sciences and School of Data Science City University of Hong Kong School of Mathematical Sciences Capital Normal University

Ridge regression is an effective tool to handle multicollinearity in regressions. It is also an essential type of shrinkage and regularization methods and is widely used in big data and distributed data applications. the divide and conquer trick, which combines the estimator in each subset with equal weight, is commonly applied in distributed data. to overcome multicollinearity and improve estimation accuracy in the presence of distributed data, we propose a Mallows-type model averaging method for ridge regressions, which combines estimators from all subsets. Our method is proved to be asymptotically optimal allowing the number of subsets and the dimension of variables to be *** consistency of the resultant weight estimators tending to the theoretically optimal weights is also derived. Furthermore, the asymptotic normality of the model averaging estimator is *** simulation study and real data analysis show that the proposed model averaging method often performs better than commonly used model selection and model averaging methods in distributed data cases.

关键词： 62F12 62H10 62J07 Asymptotic normality asymptotic optimality consistency distributed data Mallows model averaging ridge regression

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