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Abstract [Objective] The study aims to further study the leaf morphology and chlorophyll fluorescence characteristics of Actinidia arguta under greenhouse cultivation conditions, and to explore the differences of leaf photomorphogenesis between greenhouse and open field cultivation. [Methods] In this experiment, the 5-year-old plants of A . arguta varieties ‘Jialv’ and ‘Kuilv’ were used as test materials to determine the relative chlorophyll content and chlorophyll fluorescence parameters of leaves at different leaf ages under greenhouse and open field cultivation conditions. The differences in photomorphogenesis and chlorophyll fluorescence characteristics under greenhouse and open field cultivation conditions were analyzed. [Results] The photomorphogenesis of A . arguta cultivated in greenhouse and open field was between 1- 40 d leaf age, and the fluorescence characteristics of the same variety under different cultivation conditions tended to be consistent. After flowering, the fluorescence characteristics of the same variety under different cultivation conditions were quite different. The leaf area of A . arguta cultivated in greenhouse was larger and the content of chlorophyll b was higher, which was tending to shade leaf characteristics. The performance parameters such as PIabs were significantly lower than those of open field cultivation. The absorption and capture ability of light energy was stronger, but the heat dissipation was higher. The energy used for electron transfer was lower than that of open field cultivation, and the chlorophyll fluorescence parameters showed adaptive changes to the environment. [Conclusion] The photomorphogenesis time of A . arguta leaves is 1-40 days after leaf expansion, that is, before flowering. The photomorphogenesis of A . arguta leaves in greenhouse cultivation is different from open field cultivation, and the photosynthetic capacity is decreased slightly with the increase of leaf area. Greenhouse cultivation changes in the chlorophyll fluorescence characteristics of leaves to a certain extent and reduces photosynthetic performance.

Five new inorganic–organic hybrid compounds, [Co2(HDIBA)2(DIBA)2(H2O)4]·HPW12O40·2H2O (1), [Ni2(HDIBA)2(DIBA)2(H2O)4]·HPW12O40 (2), [Ag(H2DIBA)2·PW12O40]·2H2O (3), [Ag(H2DIBA)2·PMo12O40]·2H2O (4) and [Ag(H2DIBA)2·HSiMo12O40]·2H2O (5) (HDIBA = 3,5-di(1H-imidazol-1-yl)benzoic acid), based on Keggin-type polyoxometalates (POMs) have been synthesized by a hydrothermal method. Their structures were characterized through single-crystal X-ray diffraction, elemental analysis, powder X-ray diffraction, IR spectroscopy and thermogravimetric analysis. The discrete units of 1 are further extended into a 3D supramolecular structure by π–π stacking and hydrogen bonding interactions. In compound 2, wavy ladderlike bimetallic chains are linked by hydrogen bonding interactions to form a 3D supramolecular structure, with POMs filling in the cages. In compounds 3–5, POMs act as bidentate inorganic bridging ligands to link [Ag(H2DIBA)2]3+ into 1D chains. Their cyclic voltammetric behaviors and electrocatalytic properties were studied. Notably, compound 4 exhibits amperometric sensing performance toward BrO3−. The organic dye pollutant removal behaviors of 1–5 were explored. In addition, the antibacterial/antifungal activities and photoluminescence properties of 3–5 were also investigated. [ABSTRACT FROM AUTHOR]

Metamaterials have opened up a new field of electromagnetic wave stealth that can achieve cross-band electromagnetic wave stealth through high electromagnetic wave absorption and low infrared emission. However, traditional cross-band stealth metamaterials make covering the terahertz band challenging and have certain design flaws. This Letter introduces an innovative cross-band electromagnetic wave stealth metasurface design that can achieve cross-band stealth in the infrared, microwave, and THz bands. We use phase change materials and the gradient principle to achieve GHz and THz cross-band absorption. We also design surface height-covered low infrared emitting materials, which give them lower infrared emissivity. These functions give it enormous potential in military applications, and using phase change materials for cross-band absorption also provides new, to our knowledge, ideas for multifunctional stealth materials.

In this study, we report a simple method to improve the thermal conductivity of epoxy resin by using new magnetic composites as fillers. The rGO@Fe 3 O 4 nanocomposite has been prepared by a solvothermal method, and its morphology and chemical structure were characterized and analyzed by various characterization methods. Afterwards, the rGO@Fe 3 O 4 /EP composite material was obtained in an external magnetic field, in which the rGO@Fe 3 O 4 is uniformly dispersed in the epoxy resin matrix, arranged along the direction of the magnetic field. In addition, the orientation of rGO@Fe 3 O 4 increases with the magnetic field intensity. After doping 30% (wt) rGO@Fe 3 O 4 into epoxy resin and curing under a 500 Gs magnetic field, the rGO@Fe 3 O 4 /EP composite material is anisotropic and has a higher thermal conductivity (increased by 196.60%) parallel to the direction of the magnetic field compared to a pure ring oxygen resin., Competing Interests: There are no conflicts to declare., (This journal is © The Royal Society of Chemistry.)