Experimental analysis of microwave heating of dielectric materials using a rectangular wave guide (MODE: TE10) (Case study: Water layer and saturated porous medium)

The heating process of dielectric materials by microwave with rectangular wave guide has been investigated experimentally. This experiment is operated in the TE₁₀-dominated mode at a frequency of 2.45 GHz. It was performed for two dielectric materials, water layer and saturated porous medium. In this work, the microwave powers level, a type of dielectric materials, dimensions and positions of dielectric material on the microwave power absorb and average temperature within dielectric materials were examined in details. The results show that the locations of sample have greater effects than the other parameters. The analyses from this research serve as essential fundamentals to development of mathematic models of heat and mass transfer phenomena.     

A new luminescent anionic metal–organic framework based on heterometallic zinc(II)–barium(II) for selective detection of Fe3+ and Cu2+ ions in aqueous solution

Over the past two decades, the development of novel inorganic–organic hybrid porous crystalline materials or metal–organic frameworks (MOFs) using crystal engineering has provoked significant interest due to their potential applications as functional materials. In this context, luminescent MOFs as fluorescence sensors have recently received significant attention for the sensing of ionic species and small molecules. In this work, a new luminescent heterometallic zinc(II)–barium(II)‐based anionic metal–organic framework, namely poly[imidazolium [triaqua(μ₆‐benzene‐1,3,5‐tricarboxylato)bariumtrizinc] tetrahydrate], {(C₃H₄N₂)[BaZn₃(C₉H₃O₆)₃(H₂O)₃]·4H₂O}_n ( 1 ), was synthesized under hydrothermal conditions and characterized. Compound 1 presents a three‐dimensional framework with an unprecedented (3,5)‐connected topology of the point symbol (3.9²).(3³.4².5.9³.10), and exhibits `turn‐off' luminescence responses for the Cu²⁺ and Fe³⁺ ions in aqueous solution based on significantly different quenching mechanisms.     

The experimental investigation of heat transport and water infiltration in granular packed bed due to supplied hot water from the top: Influence of supplied water flux, particle sizes and supplied water temperature

In the present study an experimental investigation of heat transport and water infiltration in granular packed bed (unsaturated porous media) due to supplied water flux is carried out. The study is focus on the one-dimensional flow in a vertical granular packed bed column assuming local thermal equilibrium between water and particles at any specific space. This experimental study described the dynamics of heat transport and water infiltration in various testing condition. Experimentally, the influences of particle sizes, supplied water flux and supplied water temperature on heat transport and water infiltration during unsaturated flow are clarified in details. The results showed that the granular packed bed with larger particle size results in faster infiltration rate and form a wider infiltration depth. Furthermore, the increase of the supplied water flux and supplied water temperature corresponds to faster infiltration rate, but the results not linearly related to the interference between the heat transport and hydrodynamics characteristics in granular packed bed.     

具有大斯托克位移的荧光探针分子

用荧光法来监视多个生理参数时,需要几个不同的荧光探针分子.这些探针分子要被同一波长激发,但是具有明显分离的、不同的发射波长.目前,大多数荧光探针只有小的斯托克位移(50-90 nm),从而限制了它们在多个物质同时检测上的应用.在这项工作中,我们提出了一个新的分子探针设计:受体-荧光分子1-间隔-荧光分子2(简称RFSF...