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In order to study the factors that affect the crack width, cracking mechanism, and development laws of the U‐shaped steel concrete composite (USCC) beam, and to propose a crack width calculation formula suitable for this new type of composite beam, cracking tests were conducted on four simply supported beam specimens. These specimens, which featured different steel beam forms, shear connectors, and longitudinal reinforcement arrangements, were all subjected to negative bending moments. Research has shown that USCC beams and H‐shaped steel concrete composite (HSCC) beams exhibited basically consistent crack width‐load relationships. In the early stage of the experiment, the crack width of the specimen exhibits an approximately linear relationship with the load, while in the late stage of the experiment, the crack width rapidly increases. In addition, the crack width of the USCC beam specimen developed faster than that of the HSCC beam. The experimental phenomenon shows that whether it is an USCC beam or a HSCC beam, the distribution of crack width along the concrete slab width is uneven, and this non‐uniformity is more obvious outside the beam width range. The centralized arrangement of longitudinal bars will exacerbate the non‐uniformity of crack width distribution, and the overall crack width is greater than that of specimens with uniformly arranged longitudinal bars. In addition, the effectiveness of channel shear connectors in controlling crack propagation is better than that of shear studs, and the slip at the interface between the concrete slab and the steel beam of the specimen using shear studs is greater than that of the specimen using channel shear connectors when the load is large. Based on the experimental results and formulas in the “Design Standards for Steel Structures” and the “Design Specifications for Concrete Structures,” a formula for calculating the crack width of USCC beams is proposed, and the coefficients in the current specifications have been corrected. The calculated crack width is in good agreement with the experimental value, which can provide a reference for calculating the crack width of this type of composite beam. [ABSTRACT FROM AUTHOR]

A new twofold interpenetrated 3D metal–organic framework (MOF), namely, poly[[μ‐aqua‐diaqua{μ4‐2,2′‐[terephthaloylbis(azanediyl)]diacetato}barium(II)] dihydrate], {[Ba(C12H10N2O6)(H2O)3]·2H2O}n, (I), has been assembled through a combination of the reaction of 2,2′‐[terephthaloylbis(azanediyl)]diacetic acid (TPBA, H2L) with barium hydroxide and crystallization at low temperature. In the crystal structure of (I), the nine‐coordinated BaII ions are bridged by two μ2‐aqua ligands and two carboxylate μ2‐O atoms to form a 1D loop‐like Ba–O chain, which, together with the other two coordinated water molecules and μ2‐carboxylate groups, produces a rod‐like secondary building unit (SBU). The resultant 1D polynuclear SBUs are further extended into a 3D MOF via the terephthalamide moiety of the ligand as a spacer. Two intramolecular dihydrogen bonds (DHBs) between the imine H atoms and the arene H atoms contribute to maintaining the 3D structure. In the crystal, two independent MOFs interpenetrate each other, thereby producing a twofold interpenetrated 3D architecture with a 4‐connected PtS‐X topology. Intermolecular hydrogen bonding and π–π interactions contribute to the stability of the twofold interpenetrated 3D architecture. The noncovalent interactions in the coordination polymer (CP) were further investigated by Hirshfeld surface analysis and the results show that the prominent interactions are H...O (39.6%) and H...H (34.4%), as well as Ba...O (9.8%), contacts. The 3D CP (I) exhibits a fluorescence emission with a quantum yield of 0.134. [ABSTRACT FROM AUTHOR]

PbSnS2 crystals have the advantage of high performance and low cost as emerging thermoelectric materials. Herein, thermoelectric properties of PbSnS2 crystals are substantially boosted through the strategy of lattice plainification to manipulate micro‐defect. By introducing Ni elements into n‐type PbSnS2, the intrinsic Pb/Sn cation vacancies are compensated by Ni, achieving a plainer lattice and higher carrier mobility. Meanwhile, the charge density is enhanced due to the orbital hybridization between the 3d orbital of Ni and the 3p orbital of the neighboring S, further facilitating the carrier transport. Consequently, an ultrahigh carrier mobility of ≈312 cm2 V−1 s−1 in n‐type PbSnS2+0.0010Ni crystal is obtained with a largely enhanced ZT of ≈0.6 at 300 K along the in‐plane direction, and a maximum ZT of ≈1.2 can be obtained at 473 K. Moreover, a 7‐pair thermoelectric device composed of n‐type PbSnS2+0.0010Ni crystal and p‐type commercial Bi0.4Sb1.6Te3 is fabricated, which can produce a cooling temperature difference of ≈19.4 K. And a single‐leg device composed of the PbSnS2+0.0010Ni crystal realizes a maximum power generation efficiency of ≈2.7%. The work further optimizes the low‐cost and earth‐abundant PbSnS2 crystals as potential application candidates in thermoelectric cooling and power generation. [ABSTRACT FROM AUTHOR]

Climate change is one of the most pressing challenges of our time, with far‐reaching implications for ecosystems, economies, and societies worldwide. Human capital (HUC) and economic complexity (ECC) "understood as structural transformation toward more sophisticated and knowledge‐based production" can be pivotal in curtailing ecological degradation. In this context, the study explores the intricate relationship between HUC, financial development, financial globalization, gross domestic product, ECC, and ecological footprints from 1995 to 2021. To achieve this objective, advanced econometric estimation methods are employed. The results indicate the presence of cross‐sectional dependence and slope heterogeneity in the dataset. The variables present a mixed order of stationarity, while the Westerlund test indicates the presence of a long‐run equilibrium association. The results from the Method of Moments Quantile regression indicate that ECC posed a positive but insignificant effect in the lower quantile (τ = 0.1–0.25), while negative and significant in the middle (τ = 0.50) and upper quantiles (τ = 0.75–0.90). Moreover, financial globalization negatively and significantly affects ecological footprints through all the quantiles except the lower quantile (τ = 0.1). Financial development, gross domestic product, and HUC enhance environmental degradation by escalating ecological footprints. Based on the results, the study suggested enhancing the ECC and financial globalization, while sustainable utilization of HUC and strict regulations for the financial sector to foster sustainable development in E7 countries. [ABSTRACT FROM AUTHOR]

Summary: As an essential macronutrient, phosphorus (P) is often a limiting nutrient because of its low availability and mobility in soils. Drought is a major environmental stress that reduces crop yield. How plants balance and combine P‐starvation responses (PSRs) and drought resistance is unclear. In this study, we identified the transcription factor ZmPHR1 as a major regulator of PSRs that modulates phosphate (Pi) signaling and homeostasis. We found that maize zmphr1 mutants had reduced P concentration and were sensitive to Pi starvation, whereas ZmPHR1‐OE lines displayed elevated Pi concentration and yields. In addition, 57% of PSR genes and nearly 70% of ZmPHR1‐regulated PSR genes in leaves were transcriptionally responsive to drought. Under moderate and early drought conditions, the Pi concentration of maize decreased, and PSR genes were up‐regulated before drought‐responsive genes. The ZmPHR1‐OE lines exhibited drought‐resistant phenotypes and reduced stomatal apertures, whereas the opposite was true of the zmphr1 mutants. ZmPT7‐OE lines and zmspx3 mutants, which had elevated Pi concentration, also exhibited drought resistance, but zmpt7 mutants were sensitive to drought. Our results suggest that ZmPHR1 plays a central role in integrating Pi and drought signals and that Pi homeostasis improves the ability of maize to combat drought. [ABSTRACT FROM AUTHOR]

Characteristic mode (CM) analysis serves as a powerful tool for evaluating the radiation and scattering characteristics of objects. CM formulations within the method of moments (MoM) framework are widely favored due to their ability to offer clear physical insights, handle complex shapes, and facilitate straightforward implementation. However, MoM‐based CM formulations become inefficient when applied to electrically large objects due to the dense matrices involved. This article introduces a novel approach using a fast low‐rank decomposition‐based implicitly restarted Arnoldi method (IRAM) to accelerate CM computations. The adaptive cross approximation (ACA) and QR‐SVD algorithms are employed to efficiently compute the low‐rank decomposition of matrices. The ACA‐QR‐SVD algorithm offers advantages in matrix filling, LU factorization, and matrix–vector multiplication processes, thereby enhancing efficiency. Numerical simulations on two representative objects demonstrate that the proposed algorithm notably improves computational speed and reduces memory requirements while maintaining high computational accuracy. [ABSTRACT FROM AUTHOR]

Fluorosilicone rubber is essential for sealing in extreme temperatures and non‐polar environments due to its exceptional adaptability. However, achieving a high yield of fluorosilicone polymers with medium and high fluorine content remains a challenge. Herein, a facile gradient strategy is developed that involves modifying the method of cyclic monomer addition based on the rate of ring‐opening polymerization (ROP), to improve yield and adjust fluorine content precisely. The polymerization process is designed and tailored based on the reaction rates of anionic ring‐opening polymerization (AROP) and cationic ring‐opening polymerization (CROP) via an efficient gradient strategy. The effects of the polymerization process on the viscosity and yield of vinyl fluorosilicone polymers and hydrofluorosilicone polymers are investigated and optimized. Notably, the as‐prepared vinyl‐terminated fluoromethylsilane with 60% fluorine content (FMS‐Vi‐60F) has a high yield (86.6%) and high viscosity (150 000 mPa·s) in a short reaction time, which is superior to previous methods. Clearly, the gradient ring‐opening method developed in this work provides a facile and efficient synthesis for fabricating fluorosilicone polymers with a high yield and tunable fluorine content. [ABSTRACT FROM AUTHOR]

Bidirectional controllable propagation of waterborne sound holds significant importance in developing multifunctional underwater acoustic and mechanical devices. However, the existing waterborne acoustic metasurfaces have rarely explored the bidirectional sound modulations. Here, a class of Janus waterborne acoustic metasurface, enabling two‐faced arbitrarily asymmetric wavefront manipulations is reported. A three‐degree‐of‐freedom mechanical system facilitated by acoustic‐structure interaction underwater is proposed to introduce bianisotropic responses of unit cells. Monolayer ultrathin Janus metasurface is inversely designed by utilizing a function‐structure integrated topology optimization framework. Distinct underwater acoustic functionalities, including axial and oblique focusing, beam splitting, and sound diffusion, are successfully demonstrated. Underwater experiments are further conducted to validate the concept of Janus metasurface. The good consistency between experimental and simulated results confirms the excellent two‐faced asymmetric acoustic focusing performance. The proposed Janus metasurface opens up a new dimension for designing advanced waterborne acoustic devices with two‐faced multifunctional wavefront manipulations. [ABSTRACT FROM AUTHOR]

This paper proposes a novel method based on a numerical simulation approach and fatigue fracture theory to analyze the fracture behavior and assess the fatigue life of spring clips. To this end, the finite element (FE) model of the vehicle‐track‐foundation system was developed including the key parts of the type II fastening system. Meanwhile, the spring clip FE model was validated through the natural vibration characteristics. Subsequently, the numerical simulations were performed under various working conditions to obtain the fatigue characteristics of the spring clips. The fatigue crack initiation life and damage were analyzed using FE results for the spring clips with ε‐N curve and Brown‐Miller criterion. Moreover, based on the initial crack geometry of the spring clips, the maximum circumferential stress criterion with the Paris equation was employed to analyze the crack extension behavior and assess the fatigue crack extension life. Highlights: A novel approach is developed for fatigue assessment of spring clip.A FE model of vehicle‐track‐foundation system was built including fastening system.The Fracture behavior of the spring clip was reproduced.Fatigue characteristic of spring clips subjected to axle load is studied. [ABSTRACT FROM AUTHOR]

Two new two‐dimensional (2D) coordination polymers (CPs), namely, poly[diaqua[μ4‐2,2′‐(1,3,5,7‐tetraoxo‐1,2,3,5,6,7‐hexahydropyrrolo[3,4‐f]isoindole‐2,6‐diyl)diacetato‐κ4O:O′:O′′:O′′′]cadmium(II)], [Cd(C14H6N2O8)(H2O)2]n (1), and poly[[tetraaqua[μ4‐2,2′‐(1,3,5,7‐tetraoxo‐1,2,3,5,6,7‐hexahydropyrrolo[3,4‐f]isoindole‐2,6‐diyl)diacetato‐κ4O:O′:O′′:O′′′][μ2‐2,2′‐(1,3,5,7‐tetraoxo‐1,2,3,5,6,7‐hexahydropyrrolo[3,4‐f]isoindole‐2,6‐diyl)diacetato‐κ2O:O′]dizinc(II)] dihydrate], {[Zn(C14H6N2O8(H2O)2]·H2O}n (2), have been synthesized by the microwave‐irradiated reaction of Cd(CH3COO)2·2H2O and Zn(CH3COO)2·2H2O, respectively, with N,N′‐bis(glycinyl)pyromellitic diimide {BGPD, namely, 2,2′‐(1,3,5,7‐tetraoxo‐1,2,3,5,6,7‐hexahydropyrrolo[3,4‐f]isoindole‐2,6‐diyl)diacetic acid, H2L}. In the crystal structure of 1, the CdII ion is six‐coordinated by four carboxylate O atoms from four symmetry‐related L2− dianions and two coordinated water molecules, furnishing an octahedral coordination geometry. The bridging L2− dianion links four symmetry‐related CdII cations into a 2D layer‐like structure with a 3,4‐connected bex topology. In the crystal structure of 2, the ZnII ion is five‐coordinated by three carboxylate O atoms from three different L2− dianions and two coordination water molecules, furnishing a trigonal bipyramidal coordination geometry. Two crystallographically independent ligands serve as μ4‐ and μ2‐bridges, respectively, to connect the ZnII ions, thereby forming a 2D layer with a 3,3‐connected hcb topology. Crystal structure analysis reveals the presence of n→π* interactions between two carbonyl groups of the pyromellitic diimide moieties in 1 and 2. CP 1 exhibits an enhanced fluorescence emission compared with free H2L. The framework of 2 decomposes from 720 K, indicating its high thermal stability. A comparative analysis of a series of structures based on the BGPD ligand indicates that the metal‐ion size has a great influence on the connection modes of the metal ions due to different steric effects, which, in turn, affects the structures of the SBUs (secondary building units) and frameworks. [ABSTRACT FROM AUTHOR]

A new three‐dimensional (3D) coordination polymer, namely, poly[diaqua[μ5‐2,2′‐(1,3,5,7‐tetraoxo‐1,2,3,5,6,7‐hexahydropyrrolo[3,4‐f]isoindole‐2,6‐diyl)diacetato]barium(II)], [Ba(C14H6N2O8)(H2O)2]n, (I), has been synthesized by the microwave‐irradiated reaction of Ba(NO3)2 with N,N′‐bis(glycinyl)pyromellitic diimide {BGPD, namely, 2,2′‐(1,3,5,7‐tetraoxo‐1,2,3,5,6,7‐hexahydropyrrolo[3,4‐f]isoindole‐2,6‐diyl)diacetatic acid, H2L}. The title compound was structurally characterized by single‐crystal X‐ray diffraction analysis and powder X‐ray diffraction analysis, as well as IR spectroscopy. In the crystal structure of (I), the BaII ion is nine‐coordinated by six carboxylate O atoms from five symmetry‐related L2− dianions and one imide O atom, as well as two water O atoms. The coordination geometry of the central BaII ion can be described as a spherical capped square antiprism. One carboxylate group of the ligand serves as a μ3‐bridge linking the BaII cations into a one‐dimensional polynuclear secondary building unit (SBU). Another carboxylate group of the ligand acts as a μ2‐bridge connecting the 1D SBUs, thereby forming a two‐dimensional (2D) SBU. The resulting 2D SBUs are extended into a 3D framework via the pyromellitic diimide moiety of the ligand as a spacer. The 3D Ba framework can be simplified as a 5‐connected hexagonal boron nitride net (bnn) topology. The intermolecular interactions in the 3D framework were further investigated by Hirshfeld surface analysis and the results show that the prominent interactions are H...O (45.1%), Ba...O (11.1%) and C...H (11.1%), as well as H...H (11.1%) contacts. The thermal stability, photoluminescence properties and UV–Vis absorption spectra of (I) were also investigated. The coordination polymer exhibits a fluorescence emission with a quantum yield of 0.071 and high thermal stability. [ABSTRACT FROM AUTHOR]

Exceptional point (EP), a special degeneracy in non‐Hermitian systems, has exhibited various distinctive wave characteristics. However, the conventional synthesis of scattering EPs in acoustics is confined to rather limited methods for breaking Hermiticity, typically requiring intrinsic losses or open interfaces. Here, the concept of synthesizing scattering EPs is theoretically and experimentally demonstrated by leveraging a metasurface with fluid‐solid interaction (FSI) in water. The incorporation of FSI offers a novel mechanism to customize natural radiation losses. Simulations and experiments consistently confirm that synthesized EPs result in extremely asymmetric scattering patterns, even in the case of spatially impenetrable metasurfaces. This enhanced spatial symmetry breaking benefits from the FSI on the interface and the nonlocal interaction between unit cells. The proposed non‐Hermitian framework, involving the interplay of sound in fluids and solids, is expected to open up new possibilities for exploring unique non‐Hermitian physics and underwater acoustic applications. [ABSTRACT FROM AUTHOR]

With both TEMPO and O2 (in air) as the homogeneous redox mediators, BiBrO as the heterogeneous semiconductor photocatalyst, the first example of semi‐heterogeneous photocatalytic decarboxylative phosphorylation of N‐arylglycines with diarylphosphine oxides was established. A series of α‐amino phosphinoxides were efficiently synthesized. [ABSTRACT FROM AUTHOR]

Thermoelectric materials are widely researched for their energy conversion capabilities in the fields of power generation and refrigeration. And a superior thermoelectric conversion efficiency requires an excellent power factor and low thermal conductivity. Herein, a remarkable thermoelectric figure of merit（ZT） ∼ 2.6 at 673 K is realized in GeTe with 20% addition of CuSbSe2. Multiple synergistic effects of CuSbSe2 alloying collectively contribute to the excellent thermoelectric performance in GeTe. CuSbSe2 alloying effectively tunes ultrahigh carrier density of GeTe to the optimum. The introduction of Cu, Sb, and Se atoms create numerous point defects that scatter high‐frequency phonons. Additionally, surplus CuSbSe2 facilitates the formation of copper‐selenium phases, which embed at grain boundaries and generate interfaces after sintering. Combining the planar defects evolved from Ge vacancies, multi‐dimension defects effectively scatter multiple frequency phonons. An extraordinarily low lattice thermal conductivity of 0.3 Wm−1 K−1 at 673 K is obtained, approaching the theoretical estimation predicted by Cahill model. Eventually, the peak conversion efficiency of 7.4% is obtained in segmented device with ΔT of 419 K. The commingled effects of CuSbSe2 in GeTe further open up an elitist route to designing high‐performance materials. [ABSTRACT FROM AUTHOR]

Thermoelectric cooling has gained much attention due to its significant application in 5G communication chip cooling. Enhancing the performance of thermoelectric cooling devices is an imminent and pressing concern. Applying the same material for both n‐type and p‐type components can promote the compatibility of thermoelectric cooling module due to their similar mechanical properties. This work focuses on the development of thermoelectric cooling module based on n‐type and p‐type PbTe ingots. The high ZT values near room temperature are achieved through fabricating PbTe ingots. This approach substantially enhances the carrier mobility by minimizing charge carrier scattering at grain boundaries compared to polycrystals. These optimized ingots are then utilized to construct a thermoelectric cooling device consisting of seven pairs of thermoelectric couples, which achieves a maximum cooling temperature difference of ≈14 K at room temperature and ≈28 K at 350 K. This study offers fresh insights into the development of thermoelectric cooling module using PbTe‐based materials. [ABSTRACT FROM AUTHOR]

Summary: False data injection attacks can disrupt the steering control actions and make a real threat to both the security and safety of autonomous vehicles. In this paper, a secure event‐triggered lateral control approach of autonomous vehicles subject to actuator attacks is investigated. Firstly, an arbitrary unknown actuator attacks is considered in the secure lateral steering control of autonomous vehicles. Thus, to save communication resources for the limited bandwidth CAN bus, the periodic event‐triggered transmission scheme is utilized, transforming the established lateral steering control into a time‐delay system through the consideration of periodic event‐triggered sampling. Then, an adaptive control compensation scheme is developed to mitigate the malicious effects caused by actuator attacks. The proposed secure control approach is skilled in compensating the unknown attacked steering control actions in an adaptive way. The stabilization criteria under the adaptive secure control law is well derived by Lyapunov–Krasovskii method and some linear inequality matrices operations. At last, the effectiveness of the proposed secure control scheme is verified by some numerical experiments borrowed from a practical vehicle. [ABSTRACT FROM AUTHOR]

In this study, we highlight the impact of catalyst geometry on the formation of O−O bonds in Cu2 and Fe2 catalysts. A series of Cu2 complexes with diverse linkers are designed as electrocatalysts for water oxidation. Interestingly, the catalytic performance of these Cu2 complexes is enhanced as their molecular skeletons become more rigid, which contrasts with the behavior observed in our previous investigation with Fe2 analogs. Moreover, mechanistic studies reveal that the reactivity of the bridging O atom results in distinct pathways for O−O bond formation in Cu2 and Fe2 catalysts. In Cu2 systems, the coupling takes place between a terminal CuIII−OH and a bridging μ−O⋅ radical. Whereas in Fe2 systems, it involves the coupling of two terminal Fe–oxo entities. Furthermore, an in‐depth structure–activity analysis uncovers the spatial geometric prerequisites for the coupling of the terminal OH with the bridging μ−O⋅ radical, ultimately leading to the O−O bond formation. Overall, this study emphasizes the critical role of precisely adjusting the spatial geometry of catalysts to align with the O−O bonding pathway. [ABSTRACT FROM AUTHOR]

Halide perovskites, in the form of thin films and colloidal nanocrystals, have recently taken semiconductor optoelectronics research by storm, and have emerged as promising candidates for high‐performance solar cells, light‐emitting diodes (LEDs), lasers, photodetectors, and radiation detectors. The impressive optical and optoelectronic properties, along with the rapid increase in efficiencies of solar cells and LEDs, have greatly attracted researchers across many disciplines. However, most advances made so far in terms of preparation (colloidal nanocrystals and thin films), and the devices with highest efficiencies are based on Pb‐based halide perovskites, which have raised concerns over their commercialization due to the toxicity of Pb. This has triggered the search for lower‐toxicity Pb‐free halide perovskites and has led to significant progress in the last few years. In this roadmap review, researchers of different expertise have joined together to summarize the latest progress, outstanding challenges, and future directions of Pb‐free halide perovskite thin films and nanocrystals, regarding their synthesis, optical spectroscopy, and optoelectronic devices, to guide the researchers currently working in this area as well as those that will join the field in the future. [ABSTRACT FROM AUTHOR]

BiSbSe3 is a Te‐free thermoelectric material with intrinsically low thermal conductivity. Its thermoelectric performance is limited by poor electrical conductivity. To optimize electrical conductivity, Bi2SbSe3 with high carrier concentration and mobility is introduced to BiSbSe3 matrix through in situ reaction and conventional mechanical mixing. In both methods, carrier concentrations are improved by carrier injection and redistribution. Carrier mobility is manipulated based on microstructure. In the conventional method, isolated flake‐shaped Bi2SbSe3 grains with weak‐bonding phase boundaries restrict carrier mobility. For the in situ method, irregular Bi2SbSe3 connects into conductive networks inducing a percolation effect, and in situ formed small‐angle phase boundaries barely impede carriers. Thus, the carrier mobilities of in situ composites are significantly improved and higher than that of conventional composites. Simultaneously optimized carrier concentration and mobility remarkably enhance electrical conductivity over the whole working temperature. Maximum electrical conductivity of 378 S cm−1 is achieved in BiSbSe3‐38 vol% Bi2SbSe3 in situ composites at 300 K, obtaining more than 300% improvement compared with 124 S cm−1 in BiSbSe3 matrix. Lattice thermal conductivity is reduced at a low compositing fraction. Ultimately, a record‐breaking average ZT of 0.65 (300–750 K) is attained in BiSbSe3‐13 vol% Bi2SbSe3 in situ composite. The in situ compositing method in this work effectively optimizes electrical performance, anticipated to be applied in other thermoelectric materials. [ABSTRACT FROM AUTHOR]

Background. Muscle fatigue is defined as a decrease in maximal force or power production in response to contractile activity, which can cause muscle damage and limit athletic performance. A mass of phytochemicals were certified feasibly in relieving exercise-induced fatigue. Mangiferin, a multifactorial pharmacological phytochemical, was a promising candidate in theory; nonetheless, the potential molecular mechanisms of mangiferin on exercise-induced fatigue need to be elucidated. Methods. In this research, a mouse fatigue model was induced by forced swimming 4 weeks, and mangiferin was supplied in 100 mg/kg. The protective effects of mangiferin were illustrated by rotating rod test, serum biochemical indicators (LA, CK, BUN, ALT, and AST), and gastrocnemius morphology. Then, the targets of mangiferin against exercise-induced fatigue were predicted using network pharmacology through a comprehensive search and analysis with STITCH, PharmMapper Serve, STRING, and AutoDock Vina. Furthermore, predicted target genes were verified in gastrocnemius by immunohistochemistry. Results. Mangiferin has a significant antifatigue effect by prolonging the rotating time of the rod test. Serum biochemical indicators were mitigated (LA, CK, BUN, ALT, and AST), and gastrocnemius injury was easing. Network pharmacology was used to find that mangiferin might alleviate exercise-induced fatigue through regulating NFκB, PTGS2, TNF-α, and CCL2, and those aberrant expressions were verified in gastrocnemius. Molecular docking indicated that NFκB may be the most important molecule locking with mangiferin. Furthermore, the levels of IL-1β, TNF-α, IL-6, and MDA were significantly upregulated, while SOD and GSH-PX were downregulated in serum of fatigue mice, which were reversed with mangiferin treatment. Conclusion. Mangiferin is a feasible treatment to mitigate exercise-induced fatigue by anti-inflammation and antioxidative stress, through regulating the expression of NFκB and its downstream molecules. [ABSTRACT FROM AUTHOR]

A many‐body calculation is implemented on a strongly correlated metal Ce3Pb by density functional theory plus dynamical mean‐field theory, including 4f−4f electron correlation, 4f‐conduction electron hybridization and relativistic effects. Calculation results suggest that j = 5/2 and j = 7/2 manifolds are in partially filled and empty states, respectively. Negligible contributions of 4 f°, 4f2, and 4f3 configurations give the occupation number of 4f electrons n4f about 1.0, indicating the high 4f localization in Ce3Pb above T = 300 K, in accord with the Bader charge analysis, electron localization function and charge density difference. The detailed analysis of the spectra features yields the quasi‐particle peak, Kondo resonance peak as well as Hubbard bands close to Fermi level. Finally, the quasi‐particle band structure is estimated to compare with the potential angle‐resolved photoemission spectrum. [ABSTRACT FROM AUTHOR]

Tetrapanax papyrifer, the rice‐paper plant, is an evergreen shrub and is traditionally used as a herbal medicine in China. In October 2021, a serious leaf spot disease was extensively observed on T. papyrifer in Guizhou, China. Given the limited information available about the aetiology of this disease, isolations were performed, the morphological characteristics and multi‐locus phylogenetic analysis of the fungus associated with the disease were described, and the pathogenicity tests and Koch's postulates were completed. To our knowledge, this is the first report of leaf spot on T. papyrifer caused by Alternaria tenuissima in China. Among 11 fungicides tested, 10% difenoconazole WDG had the best inhibition effect in vitro with EC50 values at 0.1 μg mL−1. This study provides new information for the identification and chemical control of Alternaria leaf spot of T. papyrifer. [ABSTRACT FROM AUTHOR]

The Xilekuduke porphyry Mo‐Cu deposit is located in the Altay‐East Junggar region of the Central Asian Orogenic Belt, northwest China. The orebodies occurring as vein type are host within the monzogranite and granite porphyry. Ore minerals include mainly molybdenite, pyrite, and chalcopyrite, whilst the major alteration include potassic, sericite, carbonate, and silicic. Mineralization can be divided into three stages: quartz‐K‐feldspar–polymetallic stage (Stage I), quartz‐polymetallic stage (Stage II), and quartz–calcite–pyrite (minor) stage (Stage III). Three types of fluid inclusion are present in the Mo‐Cu sulfide–calcite–quartz veins: CO2‐bearing (C‐type), aqueous (W‐type), and daughter mineral‐bearing (S‐type). Petrographic and microthermometric analyses of the fluid inclusions yielded homogenization temperatures for Stage I, II, and III to be 402–499°C, 214–391°C, and 136–254°C, respectively, with corresponding salinities of 39.2–59.6, 3.7–44.9 and 4.1–14.4 wt% NaCl equivalent. The δ18OH₂O and δD values of fluid inclusions in quartz are determined to be 5.3–6.0 ‰ and −76 to −60 ‰ (Stage I), 1.7–3.2 ‰ and −96 to −90 ‰ (Stage II), and −2.6 to −2.4 ‰ and −106 ‰ (Stage III), respectively. These results indicate that the primary ore‐forming fluids (stages I and II) were derived from granitic magma and were mixed with meteoric water in stage III. For the sulfide and sulfate (anhydrite), their δ34S values are of 0.4–5.8 ‰, 13.9–14.4 ‰, respectively, also that suggest a magmatic source. Fluid immiscibility, meteoric water interaction, and ore fluid‐wallrock interactions may have been critical for molybdenum precipitation. [ABSTRACT FROM AUTHOR]

We report herein the first nonheme CuFe oxygen reduction catalyst ([CuII(bpbp)(μ‐OAc)2FeIII]2+, CuFe−OAc), which serves as a functional model of cytochrome c oxidase and can catalyze oxygen reduction to water with a turnover frequency of 2.4×103 s−1 and selectivity of 96.0 % in the presence of Et3NH+. This performance significantly outcompetes its homobimetallic analogues (2.7 s−1 of CuCu−OAc with %H2O2 selectivity of 98.9 %, and inactive of FeFe−OAc) under the same conditions. Structure‐activity relationship studies, in combination with density functional theory calculation, show that the CuFe center efficiently mediates O−O bond cleavage via a CuII(μ‐η1 : η2‐O2)FeIII peroxo intermediate in which the peroxo ligand possesses distinctive coordinating and electronic character. Our work sheds light on the nature of Cu/Fe heterobimetallic cooperation in oxygen reduction catalysis and demonstrates the potential of this synergistic effect in the design of nonheme oxygen reduction catalysts. [ABSTRACT FROM AUTHOR]

The multicomponent reactions of quinoxalin‐2(1H)‐ones has attracted considerable interest due to their significant biological and chemical activities. The very recent advances (from 2021 to the beginning of 2023) on the radical three‐component cascade reaction of quinoxalin‐2(1H)‐one derivatives at the C3 position were summarized in this mini‐review. According to the kind of radical types involved, some representative examples and detailed reaction mechanism have been categorized and discussed. The red front was covered by Figure 1. [ABSTRACT FROM AUTHOR]

Five yeast strains isolated from tree bark and rotten wood collected in central and southwestern China, together with four Brazilian strains (three from soil and rotting wood collected in an Amazonian rainforest biome and one from Bromeliad collected in Alagoas state) and one Costa Rican strain isolated from a flower beetle, represent a new species closely related with Yueomyces sinensis in Saccharomycetaceae, as revealed by the 26S ribosomal RNA gene D1/D2 domain and the internal transcribed spacer region sequence analysis. The name Yueomyces silvicola sp. nov. is proposed for this new species with the holotype China General Microbiological Culture Collection Center 2.6469 (= Japan Collection of Microorganisms 34885). The new species exhibits a whole‐genome average nucleotide identity value of 77.8% with Y. sinensis. The two Yueomyces species shared unique physiological characteristics of being unable to utilize ammonium and the majority of the amino acids, including glutamate and glutamine, as sole nitrogen sources. Among the 20 amino acids tested, only leucine and tyrosine can be utilized by the Yueomyces species. Genome sequence comparison showed that GAT1, which encodes a GATA family protein participating in transcriptional activation of nitrogen‐catabolic genes in Saccharomyces cerevisiae, is absent in the Yueomyces species. However, the failure of the Yueomyces species to utilize ammonium, glutamate, and glutamine, which are generally preferred nitrogen sources for microorganisms, implies that more complicated alterations in the central nitrogen metabolism pathway might occur in the genus Yueomyces. Take‐away: Yueomyces silvicola sp. nov. occurs in tropical and subtropical forests worldwide.Yueomyes species are unable to utilize ammonium and can utilize only leucine and tyrosine among the 20 amino acids tested.Yueomyces species lack GAT1, which encodes an activator of nitrogen‐catabolic genes.The negative glutamate and glutamine assimilation imply more complicated alterations in the central nitrogen metabolism pathway in Yueomyces. [ABSTRACT FROM AUTHOR]

Aim: Sjögren syndrome (SS) is a slowly progressive, inflammatory, autoimmune disease. The aim of this study was to construct the DNA methylation profiles of whole blood of SS patients and healthy controls (HC), and to explore the role of differentially methylated genes in the pathogenesis of the disease. Methods: Whole‐genome bisulfite sequencing was performed on three SS patients and four HC. The biological function of genes associated with differentially methylated regions (DMRs) was investigated using Gene Ontology functional analysis and Kyoto Encyclopedia of Genes and Genomes pathway analysis, using network‐based key driver analysis (KDA) to find KDA genes. In clinical samples of SS patients and controls, the expression levels of KDA genes were validated by quantitative real‐time polymerase chain reaction and immunohistochemical analysis. Moreover, the diagnostic value of KDA genes for SS was confirmed using receiver operating characteristic curves. Results: We identified 322 DMRs, annotated as 162 associated genes. Six genes were selected via the number of networks of KDA genes. Differential expression of genes such as human leukocyte antigen (HLA) class I, ADAR, and OAS2 was observed in patients' peripheral blood mononuclear cells and the minor salivary glands, which can be used as potential diagnostic biomarkers for SS. Conclusion: Clinical sample validation suggested that HLA class I, ADAR, and OAS2 might play a role in the development of SS. Our study shows epigenetic regulatory mechanisms and potential disease markers associated with SS, which in turn will enable us to identify new therapeutic targets. [ABSTRACT FROM AUTHOR]

A green and practical method for the electrochemical synthesis of tetrahydroimidazo[1,5‐a]quinoxalin‐4(5H)‐ones through the three‐component reaction of quinoxalin‐2(1H)‐ones, N‐arylglycines and paraformaldehyde was reported. In this strategy, EtOH played dual roles (eco‐friendly solvent and waste‐free pre‐catalyst) and the in situ generated ethoxide promoted triple sequential deprotonations. [ABSTRACT FROM AUTHOR]

The Hongyuan porphyry Mo–Cu deposit (PMCD) is a rare example of a "reduced" deposit, in contrast to classical oxidized porphyry Cu or Mo–Cu deposits. It is characterized by an ilmenite–series I–type felsic granitoid intrusion, reduced ore‐forming fluids with methane‐rich fluid inclusions, and widely distributed primary pyrrhotite. Mo–Cu mineralization in the Hongyuan PMCD occurs as disseminated in porphyry, granular in miarolitic cavity, and vein‐type in the quartz vein. These three types of mineralization are generally produced in the late magmatic period, magmatic‐hydrothermal transition period, and hydrothermal period, respectively. Molybdenite from miarolitic cavities shows a greater contribution from mantle fluid, as evidenced by mantle He proportions of 37.6%–16.8%. Molybdenite in quartz veins has relatively lower mantle He proportions of 1.63%–10.5%, indicating a predominantly crustal fluid source. The 3He/4He variations of these two groups of molybdenite illustrate an increasing input of crustal fluid during the magmatic to hydrothermal transition. Molybdenite samples from miarolitic cavities and quartz veins yield a Re‐Os model age of 300.5 ± 3.7 Ma, which is consistent with the U–Pb ages of zircons in the wallrock porphyries (300–302 Ma). This further indicates simultaneous diagenesis accompanied by mineralization. The Sr–Nd isotopic compositions (initial 87Sr/86Sr: 0.703404–0.703552; initial 143Nd/144Nd: 0.512585–0.512655; εNd[t]: +6.56 to +7.90) and young T2DM model ages (421–531 Ma) of the Hongyuan porphyries suggest that these rocks were derived from partial melting of the basaltic lower crust. We propose that mantle‐derived fluids rose up and mixed with fluids from the lower crust under an extensional tectonic setting, forming mantle‐like Sr–Nd–He–Ar isotopic compositions. The pre‐mineralization stage of the Hongyuan reduced PMCD is marked by quartz‐molybdenite ± K‐feldspar ± pyrite veins or veinlets and miarolitic cavities in the intensively potassic alteration zone. These veins formed at high temperatures (400–476°C) and high salinities (47.5–56.6 wt.%). The syn‐mineralization stage is the main metallogenic stage represented by numerous quartz‐molybdenite ± pyrrhotite veins associated with moderate to high temperatures (248°C–424°C) and low to high salinities (1.57–50.1 wt.%). The post‐mineralization stage is characterized by low temperatures (104–270°C) and low salinities (0.35–8.81 wt.%). Fluid immiscibility, mixing with meteoric water, ore fluid‐wall rock interactions, and decreasing temperature and salinity have played important roles during molybdenum mineralization. [ABSTRACT FROM AUTHOR]

Objectives: To describe four endoscopic endonasal subapproaches, namely, the trans‐lamina papyracea, trans‐prelacrimal recess, trans‐Meckel's cave, and transclival approaches for trigeminal schwannomas (TSs). Methods: This retrospective study reviewed the medical records and intraoperative videos of 38 patients with TSs who underwent endoscopic endonasal approach (EEA) between Jan 2013 and Dec 2021. Results: According to Jeong's classification, for TS equally in middle and posterior fossae (MP), a purely trans‐Meckel's cave approach was carried out in 2 cases, and a combined transclival approach was carried out in 4 cases. The four tumors that involved infratemporal fossa (two E3, one mE3, and one Mpe3) were performed via a trans‐prelacrimal recess approach, and type Mpe3 was also assisted by the trans‐Meckel's cave approach. One patient with type E1 was treated with a trans‐lamina papyracea approach. The other 27 cases, including type M, Mp, ME2, and MpE2, were all removed by a purely trans‐Meckel's cave approach. Thirty‐six patients (97.4%) received total resection under a purely EEA. The functional abilities and preoperative symptoms of 31 patients (88.6%) improved. Eight (21.1%) patients experienced permanent neurological function deficits. Postoperative cerebrospinal fluid and intraoperative internal carotid artery injury occurred in 1 (2.6%) patient. Conclusion: According to the specific endoscopic endonasal subapproaches corresponding to the different TS locations, satisfactory results can be obtained for most types of tumors. It represents an effective alternative to the open transcranial approach and can also be properly used in most types of TS with experienced hands. Level of Evidence: 4 Laryngoscope, 133:2564–2571, 2023 [ABSTRACT FROM AUTHOR]

The malicious physical attacks from both sensor and actuator sides make real threats to the security and safety of autonomous ground vehicles (AGVs). This paper focuses on the problem of neural‐network‐based event‐triggered adaptive security control (ET‐ASC) scheme for path following of AGVs subject to arbitrary abnormal actuator signal. First, we assume that an arbitrary abnormal signal is caused by arbitrary malicious attacks or disturbances from actuators. Then, radial basis function neural network (RBF‐NN) is used to reconstruct such abnormal actuator signal. Second, modelling issues on security path following control of AGVs with Sigmoid‐like ETC scheme are shown when the AGV is suffering from abnormal actuator signal. In what follows, an ET‐ASC scheme is developed to mitigate the adverse effects of abnormal actuator signal with the reconstructed abnormal signal based on a novel Sigmoid‐like event‐triggered communication scheme. By using the proposed RBF‐NN‐based ET‐ASC scheme, H∞$$ {H}_{\infty } $$ control performance can be guaranteed under arbitrary malicious actuator signal rather than such attacks following a specific probability distribution. Final, some simulation experiments are provided to verify the effectiveness of proposed ET‐ASC scheme. [ABSTRACT FROM AUTHOR]

The sulfur cathode host Fe1‐xMxS2 (M=transition‐metal; x=0, 0.125, and 0.25) for the sulfur redox chemistry is essential to facilitate the fast charge‐discharge kinetics of lithium‐sulfur‐batteries (LSBs). Applying first‐principles calculations, the formation energy, conductivity, work function, charge redistribution, chemical adsorption, and catalytic performance of Fe1‐xMxS2 are systematically investigated. Ti/V‐doped FeS2 has low lattice distortion and formation energy, and facilitates the Li+ diffusion due to charge redistribution. Chemical adsorption for polysulfides (LiPSs) is closely related to d‐band center of Fe1‐xMxS2. Li2S's activation begins with the transfer of electrons from the electron‐rich metal center to the empty orbitals of Li2S. Gibbs free energy change of Li2S4 to Li2S determines the catalytic efficiency. Li2S deposition and decomposition affects the redox kinetics of sulfur. Ti/V‐doped FeS2 has superior conductivity, chemical adsorption, and has low thermodynamic barrier of Li2S deposition. Li2S decomposition tends to occur on Fe0.875Ti0.125S2(001) surface. In general, Ti/V‐doped FeS2, as the host material of the sulfur cathode, is more beneficial to the cycle performance of LSBs. The electrochemical properties of sulfur cathode host materials can be controlled by doping, and can be manipulated and optimized in a certain range through electronic structure and chemical composition design in LSBs. [ABSTRACT FROM AUTHOR]

The accumulation of heat in electronic devices puts forward an urgent demand for thermal interface materials. It is still a great challenge to achieve the good comprehensive performance of high thermal conductivity (TC), insulation, flexibility and tensile strength. In this work, polyester‐based nonwoven fabric (NWF) was coated with boron nitride nanosheets (BNNS) by dispersion and interfacial reinforcement of cellulose nanofibers to obtain a three‐dimensional thermally conductive network skeleton (BNNS@NWF). The sandwich‐structured composite film was assembled by introducing alumina (Al2O3)/polydimethylsiloxane (PDMS) layers on the top and bottom surfaces of BNNS@NWF using scratch coating and hot pressing processes. The composite film has a high TC of 6.42 W/mK at 45.8 wt% BNNS content, and has excellent insulation with a volume resistivity of 1.06 × 1015 Ω cm. This is due to the long‐range effective thermal conduction path constructed by BNNS, the bridging effect of Al2O3 and the synergistic effect of the two fillers. PDMS helps the composite film maintain good flexibility and good TC stability after 30 bending cycles. The PET nonwoven interlayer gives the composite film good mechanical properties with a tensile strength of 17.5 MPa. This work provides a strategy for the efficient preparation of flexible composite films with high TC and insulation properties, which is of great importance for the development of innovative thermal interface materials. Highlights: A sandwich‐structured composite film was prepared by a simple scale‐up method.Al2O3 and BNNS achieves synergistic enhancement of thermal conductivity.The film has a high thermal conductivity of 6.42 W/mK and electrical insulation.The film shows good flexibility, high tensile and thermal management properties. [ABSTRACT FROM AUTHOR]

Extreme impedance mismatch causes sound insulation at water–air interfaces, limiting numerous cross‐media applications such as ocean‐air wireless acoustic communication. Although quarter‐wave impedance transformers can improve transmission, they are not readily available for acoustics and are restricted by the fixed phase shift at full transmission. Here, this limitation is broken through impedance‐matched hybrid metasurfaces assisted by topology optimization. Sound transmission enhancement and phase modulation across the water–air interface are achieved independently. Compared to the bare water–air interface, it is experimentally observed that the average transmitted amplitude through an impedance‐matched metasurface at the peak frequency is enhanced by ≈25.9 dB, close to the limit of the perfect transmission 30 dB. And nearly 42 dB amplitude enhancement is measured by the hybrid metasurfaces with axial focusing function. Various customized vortex beams are experimentally realized to promote applications in ocean‐air communication. The physical mechanisms of sound transmission enhancement for broadband and wide‐angle incidences are revealed. The proposed concept has potential applications in efficient transmission and free communication across dissimilar media. [ABSTRACT FROM AUTHOR]

Background and Purpose: At present, the role of diffusion tensor imaging (DTI) remains controversial. This study aimed to confirm the role of DTI by comparing the differences in fractional anisotropy (FA) values between patients with cervical spinal cord compression (CSCC) and healthy individuals. Methods: A systematic and comprehensive literature search was conducted using the Web of Science, Embase, PubMed, and Cochrane Library databases to compare the mean FA values of patients with CSCC and healthy controls across all compression levels in the cervical spinal cord. Essential data from the literature, such as demographic information, imaging parameters, and DTI analysis method, were extracted. Fixed‐ or random‐effect models based on I2 heterogeneity were applied to the pooled and subgroup analyses. Results: Ten studies containing 445 patients and 197 healthy volunteers were eligible. The pooled results demonstrated a decrease in mean FA values across all compression levels in the experiment group compared to those in healthy controls (standardized mean difference = –1.54; 95% confidence interval = [–1.95, –1.14]; p <.001). Meta‐regression revealed that the scanner field strength and DTI analysis method had a significant effect on heterogeneity. Conclusions: Our results show that FA values in the spinal cord decline in patients with CSCC, thus confirming the crucial role of DTI in CSCC. [ABSTRACT FROM AUTHOR]

Modern organic photonics is heavily reliant on micro‐/nanostructured organic crystalline materials, not least because they exhibit advantageous physicochemical properties and can be easily fabricated by bottom‐up approaches such as self‐assembly driven by weak noncovalent intermolecular interactions (van der Waals forces, π–π interactions, hydrogen bonds, halogen bonds, charge transfer interactions, etc.). Herein, the effects of these interactions on organic crystal nucleation are summarized, the resulting low‐dimensional organic crystal structures and their optoelectronic applications are discussed, and future development prospects are presented to inspire the further investigation of such optofunctional structures. [ABSTRACT FROM AUTHOR]

Heterogeneous composites consisting of Bi6Cu2Se3.6Cl0.4O6 and Bi2O2Se are prepared according to the concept of modulation doping. With prominently increased carrier mobility and almost unchanged effective mass, the electrical transport properties are considerably optimized resulting in a peak power factor ≈1.8 µW cm−1 K−2 at 873 K, although the carrier concentration is slightly deteriorated. Meanwhile, the lattice thermal conductivity is lowered to ≈0.62 W m−1 K−1 due to the introduction of the second phase. The modified Self‐consistent Effective Medium Theory is utilized to explain the deeper mechanism of modulation doping. The enhancement of apparent carrier mobility is derived from the highly active phase interfaces as fast carrier transport channels, while the reduced apparent thermal conductivity is ascribed to the existence of thermal resistance at the phase interfaces. Ultimately, an optimized ZT ≈0.23 is obtained at 873 K in Bi6Cu2Se3.6Cl0.4O6 + 13% Bi2O2Se. This research demonstrates the effectiveness of modulation doping for optimizing thermoelectric properties once again, and provides the direct microstructure observation and consistent theoretical model calculation to emphasize the role of interface effects in modulation doping, which should be probably applicable to other thermoelectrics. [ABSTRACT FROM AUTHOR]

Papillary thyroid carcinoma (PTC) is the most common malignant neoplasm of the thyroid gland; fine needle aspiration cytology is the most basic and reliable diagnostic method before PTC operation. However, it is not clear which cell morphological changes can be used as a reliable standard for the diagnosis of PTC. A retrospective analysis was performed on 337 patients with PTC confirmed by postoperative histology. An additional 197 randomly selected patients with benign thyroid lesions were included in the study and used as a control group. True papillary arrangements, swirl arrangements, and escape arrangements had high specificity, all of which were 100%, but only swirl arrangements had ideal sensitivity (77.61%). The nuclear volume characteristics had a high sensitivity of more than 90%, but the specificities of both nuclear crowding and nuclear overlap were too low, only 16.34% and 23.35%. The sensitivities of five nuclear structural characteristics were more than 90%, but only the specificity of intranuclear cytoplasmic pseudoinclusions (INCIs) reached 100%, nuclear contour irregularity and pale nuclei with powdery chromatin also had ideal interpretation value except for grooves and marginally placed micronucleoli. Although the sensitivity of psammoma bodies (PBs) was low, the specificity was 100%. In terms of preparation methods, the method of liquid-based preparation (LBP) is obviously better than that of conventional smears. The diagnostic efficiency by the combined detection method of parallel tests showed that without reducing the specificity, the sensitivity increased with the increase of the number of morphological characteristics and finally reached 98.81%. The INCIs and swirl arrangements are the most common and important indicators for the diagnosis of PTC, whereas papillary-like arrangements, the crowding and overlap of nuclear, grooves, marginally placed micronucleoli, and multinucleated giant cells are of little significance for the diagnosis of PTC. [ABSTRACT FROM AUTHOR]

A first principle calculation is performed on Ce3Al by means of density functional theory combined with dynamical mean‐field theory. We find that j = 5/2, j = 7/2 components are in the metallic and insulating regimes, respectively. Itinerant 4f electrons result in the so‐called virtual charge fluctuations in the context of Kondo model with an average occupancy number of 4f electrons about 1.0. Finally, the so‐called quasiparticle band structure is also discussed for comparison with experimental angle‐resolved photoemission spectrum. [ABSTRACT FROM AUTHOR]

We reported herein the development of heterobimetallic NiFe molecular platform to understand NiFe synergistic effect in water oxidation catalysis. Compared to homonuclear bimetallic compounds (NiNi and FeFe), NiFe complex possesses more remarkable catalytic water oxidation performance. Mechanistic studies suggest that this remarkable difference is attributed to the fact that NiFe synergy can effectively promote O−O bond formation. The generated NiIII(μ‐O)FeIV=O is the key intermediate and O−O bond was formed via intramolecular oxyl‐oxo coupling between bridged O radical and terminal FeIV=O moiety. [ABSTRACT FROM AUTHOR]