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Minghui Liu,Jiasheng Wang,Yingcen Liu,Rongwen Lu,Shufen Zhang 대한화학회 2019 Bulletin of the Korean Chemical Society Vol.40 No.10
We report the facile synthesis of small gold nanoparticles stabilized by carbon nanospheres (Au@C) for highly active and selective hydrogenation of 4-nitrobenzaldehyde. The formation of such a Au@C unique structure can be attributed to the high distribution of Au(III) species in the melamine-formaldehyde resin nanospheres, which were formed via the coordination of Au(III) with the abundant imino groups of melamine-formaldehyde pre-polymer. After the subsequent condensation and confined in situ reduction, small gold nanoparticles, and carbon nanospheres were formed simultaneously. Under the reaction conditions of 80 °C and 1.6 MPa, 99.3% conversion and >99% selectivity were achieved for the hydrogenation of 4-nitrobenzaldehyde to 4-aminobenzaldehyde.
Studies on the Hereditary Properties of SSR Marker in Silkworm (Bombyx mori L.)
Li Muwang,Li Minghui,Miao Xuexia,Lu Cheng,Huang Yongping Korean Society of Sericultural Science 2005 International Journal of Industrial Entomology Vol.11 No.1
Two BC1 group, c108 $\times$ (p50 $\times$ c108) and p50 $\times$ (p50 $\times$ c108), one group of F$_{2}$ progeny, (p50 $\times$ c108) F$_{2}$ ,and 3 SSR markers, F10539, FlO626 and FlO618 were used to test the hereditary properties of SSR markers in silkworm. FI0539, FlO626 were proved to be linkage, and FlO618 was proved to be independent to those two markers. According to Mendel's law, the recombinant value between F10539, FlO626 was calculated in all of these groups, and they were 8.55$\%$ (c108BC1), 8.02$\%$ (p50BC1) and 7.81 $\%$ (F$_{2}$) respectively. There was dominant difference among the crossing-over value using paired-samples tests by SPSS 10.0 software. This research proved that SSR markers were co-dominant in B. mori too, and F 2 progeny could be used to construct SSR linkage map although B. mori lacked of crossing over in females.
( Chijian Zhang ),( Yongjie Lu ),( Yong Ai ),( Xian Xu ),( Siyang Zhu ),( Bing Zhang ),( Minghui Tang ),( Lanyue Zhang ),( Tinggang He ) 한국미생물생명공학회(구 한국산업미생물학회) 2021 Journal of microbiology and biotechnology Vol.31 No.4
Glabridin, a compound of the flavonoid, has shown outstanding skin-whitening and anti-aging properties, but its water insolubility limits its wide application. Therefore, glabridin liposome (GL) has been developed to improve its poor bioavailability, while there are few studies to evaluate its amelioration of UVB- induced photoaging. This study is performed to investigate the amelioration of GL against UVB- induced cutaneous photoaging. The prepared GL has a spheroidal morphology with an average diameter of 200 nm. The GL shows lower cytotoxicity than glabridin, but it has a more effective role in inhibition of melanin. Moreover, the application of GL can effectively relieve UV radiation induced erythema and leathery skin, associated with the down-regulated expression of inflammatory cytokines (TNF-α, IL-6 and IL-10). Taken together, these results demonstrate that GL has potentials as topical therapeutic agents against UVB radiation induced skin damage through inhibiting inflammation.
Dynamic and static properties of sandwich-like graphene-reinforced composite plate
Min Sun,Wen-xing Lu,Minghui Yao,Jianen Chen 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.6
A graphene-reinforced composite plate (GRCP) with a sandwich-like structure is proposed. The nonlinear mechanical characteristics of the sandwich-like GRCP are investigated and compared to those of functionally graded and uniform GRCPs. The modified HalpinTsai model is employed to estimate the material parameters, and the Hamilton principle is used to derive the governing equation for the composite plates. The effects of the graphene nanoplatelet (GPL) distribution patterns, weight fraction, and the number of layers on the static and dynamic nonlinear responses of the plates are investigated. The results show that the various GPL distribution patterns have different enhancement effects on plates. Compared with the graded and uniform distribution patterns, the sandwich-like distribution pattern has significant advantages in terms of anti-vibration and anti-bending properties. Furthermore, it is found that the stresses of the sandwich-like GRCPs are discontinuous, there exist stress mutation phenomena between the surface layers and the pure matrix layer.
Synthesis and Curing of AUT-PNIMMO with Three Functional Groups
Xiaochuan Wang,Ping Li,Xianming Lu,Hongchang Mo,Minghui Xu,Ning Liu,Yuanjie Shu 한국고분자학회 2019 폴리머 Vol.43 No.4
T-PNIMMO with three functional groups was synthesized by cationic ring opening polymerization of NIMMO (3-nitratomethyl-3-methyloxetane) in the presence of TMP (trimethylolpropane) catalyzed by BF3·OEt2. Then AUTPNIMMO was synthesized by T-PNIMMO and allyl isocyanate. The polymers were characterized by FTIR, 1H NMR, 13C NMR, and their thermal stability was estimated by DSC. Moreover, tensile testing was used to evaluate the mechanical properties of polyurethane elastomer based on T-PNIMMO and toluene-2,4-diisocyanate (TDI), and isoxazoline elastomer based on AUT-PNIMMO and tetramethyl-terephthalobisnitrile oxide (TTNO). This showed an increase of tensile strength from 2.0 to 4.0 MPa and elongation at break from 150% to 500%, respectively. These results indicated that AUTPNIMMO exhibited a good thermal stability, had satisfactory mechanical properties and was expected to be used in the composite solid propellant and polymer bonded explosives.
Atmospheric Corrosion of 7B04 Aluminum Alloy in Marine Environments
( Xiaoyun Zhang ),( Ming Liu ),( Feng Lu ),( Minghui Liu ),( Zhihua Sun ),( Zhihui Tang ) 한국부식방식학회(구 한국부식학회) 2018 Corrosion Science and Technology Vol.17 No.1
Outdoor exposure tests using of 7B04 aluminium alloy samples including plate, tensile and various SCC samples were carried out in Tuandao station, Shandong province (East of China) and Wanning station, Hainan province (South of China). Corrosion characteristics including weight loss, microstructure, tensile strength and SCC susceptibility were investigated. The corrosion rates in Tuandao and Wanning showed high to low and the corrosion rates changed to the following equation of w=at<sup>b</sup> (b<1). The corrosion of 7B04 aluminium alloy in Wanning was more serious than that in Tuandao. Pitting appeared at early stage of expose test, and it can be changed to general corrosion with test time extension. The 7B04 aluminium alloy of which specimen shapes are forging and thick plate also showed SCC (Stress corrosion cracking) in the marine atmosphere. The higher SCC sensitivity was observed in Wanning station than in Tuandao station. The 7B04 aluminium alloy with a high stress level was more sensitive to SCC. Intergranular and transgranular or a mixed mode of cracking can be observed in different marine exposure.
Development of a Love Wave Based Device for Sensing Icing Process with Fast Response
Wen Wang,Yining Yin,Yana Jia,Mengwei Liu,Yong Liang,Yufeng Zhang,Minghui Lu 대한전기학회 2020 Journal of Electrical Engineering & Technology Vol.15 No.3
This work addresses the theoretical and experimental investigations of a Love wave based device employing waveguide structure of SiO2/36° YX-LiTaO3 for sensing icing process. The mass loading efect induced by the icing process modulates the acoustic wave propagation, and corresponding changes in device frequency can be collected to evaluate the icing process. The waveguide structure confnes the acoustic wave energy into SiO2 thin-flm, which contributes well to the improvement of the mass loading sensitivity. The corresponding sensing mechanism was analyzed by solving the acoustic propagation equations in layered structure. The sensing device patterned by delay-line on 36° YX-LiTaO3 substrate with SiO2 guiding layer was photolithographically developed as the sensor element, and characterized by using the high-low temperature chamber. The icing process was simulated by dropping appropriate water on top of the device surface. Very clear and fast frequency response was observed from the proposed sensing device in the icing process, and also, the infuence of SiO2 guiding layer thickness on sensor response was also investigated.