Recently,traditional Chinese medicine-based treatment has succeeded in fighting coronavirus disease 2019(COVID-19),and Rhizoma polygonati(Huangjing)has been one of the recommended components.Its processed products pla...Recently,traditional Chinese medicine-based treatment has succeeded in fighting coronavirus disease 2019(COVID-19),and Rhizoma polygonati(Huangjing)has been one of the recommended components.Its processed products play antidiabetic,antiviral,antitumor,antioxidation,antifatigue,antiaging,and immune enhancement roles.The climate in Mount Tai is mild,and the dense forest is suitable for the growth of Rhizome polygonati,which has gradually evolved into a unique specie.Considering the important medicinal value and pleasant taste of Mount Tai-Rhizoma polygonati,various healthy and functional food products,controlled by quality markers with anti-COVID-19 potential,as well as emergency foods can be developed.The study aimed to review current evidence on the nutritional value of Rhizoma polygonati from Mount Tai and its usefulness as a traditional Chinese medicine,source of herbzyme,and potential remediating agent for COVID-19 and food shortage.Most recent findings regarding herbal nanomedicine have revealed that nanoscale chemical compounds are potentially efficient in drug delivery or nanozyme catalysis upon bioprocessing.Nanoflower structure is found in processed Rhizoma polygonati by self-assembly and has wide application in enzymatic events,particularly nanoscale herbzyme.The novel findings regarding Mount Tai-Rhizoma polygonati could enhance its novel applications in chronic and hidden hunger,clinical nanomedicine,and as an anti-COVID-19 agent.展开更多
Broadband absorbers generally consist of plasmonic cavities coupled to metallic resonators separated by a dielectric film,and they are vertically stacking configurations.In this work,we propose an ultra-broadband nano...Broadband absorbers generally consist of plasmonic cavities coupled to metallic resonators separated by a dielectric film,and they are vertically stacking configurations.In this work,we propose an ultra-broadband nanowire metamaterial absorber composed of an array of vertically aligned dielectric nanowires with coaxial metallic rings.The absorber shows strong absorption from 0.2 to 7μm with an average absorption larger than 91%due to the excitation of gap surface plasmon polariton modes in Fabry–Perot-like resonators.Moreover,a refractory dielectric cladding can be added to improve the thermal stability of the absorber,showing a negligible impact on its absorption performance.The proposed absorber may find potential applications in solar energy harvesting,infrared imaging and spectroscopy,and optoelectronic devices.展开更多
Thermo-plasmonics, using plasmonic structures as heat sources, has been widely used in biomedical and microfluidic applications. However, a metasurface with single-element unit cells, considered as the sole heat sourc...Thermo-plasmonics, using plasmonic structures as heat sources, has been widely used in biomedical and microfluidic applications. However, a metasurface with single-element unit cells, considered as the sole heat source in a unit cell, functions at a fixed wavelength and has limited control over the thermo-plasmonically induced hydrodynamic effects. Plasmonic metasurfaces with metal disk heterodimer lattices can be viewed to possess two heat sources within a unit cell and are therefore designed to photo-actively control thermal distributions and fluid dynamics at the nanoscale. The locations of heat sources can be switched, and the direction of the convective flow in the central region of the unit cell can be reversed by shifting the wavelength of the excitation source without any change in the excitation direction or physical actuation of the structural elements. The temperature and velocity of a fluid are spatiotemporally controlled by the wavelength selectivity and polarization sensitivity of the plasmonic metasurface. Additionally, we investigate the effects of geometric parameters on the surface lattice resonances and their impact on the temperature and fluid velocity of the optofluidic system. Our results demonstrate excellent optical control of these plasmonic metasurface heating and thermal convection performances to design flexible platforms for microfluidics.展开更多
Circular dichroism (CD) is extensively used in various material systems for applications including biological detection,enantioselective catalysis,and chiral separation.This paper introduces a chiral absorptive metasu...Circular dichroism (CD) is extensively used in various material systems for applications including biological detection,enantioselective catalysis,and chiral separation.This paper introduces a chiral absorptive metasurface that exhibits a circular polarization-selective effect in dual bands-positive and negative CD peaks at short wavelengths and long wavelengths,respectively.Significantly,we uncover that this phenomenon extends beyond the far-field optical response,as it is also observed in the photothermal effect and the dynamics of thermally induced fluid motion.By carefully engineering the metasurface design,we achieve two distinct CD signals with high g factors (1) at the wavelengths of 877 nm and 1045 nm,respectively.The findings presented in this study advance our comprehension of CD and offer promising prospects for enhancing chiral light–matter interactions in the domains of nanophotonics and optofluidics.展开更多
There is growing concern that farmland transfers lead to less agricultural investment, which may adversely affect agricultural productivity growth in China.Prior research has primarily focused on the differences betwe...There is growing concern that farmland transfers lead to less agricultural investment, which may adversely affect agricultural productivity growth in China.Prior research has primarily focused on the differences between owned cultivated land and rented plots,but little is known about how farmland transfers between relatives,which are popular in rural China,specifically affect agricultural investment.In this paper,we present a conceptual framework of transaction cost economics to compare different contracting strategies in China's farmland rental markets.As farmland rental markets in China are immature,land transfer between relatives establishes bilateral governance,which has the advantage of addressing the opportunistic activities of both parties and can ultimately increase investment by tenants.Based on data from two waves of household surveys,we empirically examine the impact of bilateral governance on the application of organic fertilizer,an indicator for agricultural investment.Our findings show that apart from economic factors, kinship is important to the functioning of farmland rental markets in rural areas.展开更多
基金financially supported by Shandong Taishanghuangjing Biotechnology Co.Ltd.received Faculty-Development Competitive Research Grants Program of Nazarbayev University(ID:16797152,ie,15798117(110119FD4531)to Yingqiu Xie,and ID:16796808,ie,15874919(110119FD4542)to Haiyan Fan and Yingqiu Xie)2019 Asian Universities Alliance(AUA)fellowship of United Arab Emirates University(UAEU)to Yingqiu Xie and Amr Amin.
文摘Recently,traditional Chinese medicine-based treatment has succeeded in fighting coronavirus disease 2019(COVID-19),and Rhizoma polygonati(Huangjing)has been one of the recommended components.Its processed products play antidiabetic,antiviral,antitumor,antioxidation,antifatigue,antiaging,and immune enhancement roles.The climate in Mount Tai is mild,and the dense forest is suitable for the growth of Rhizome polygonati,which has gradually evolved into a unique specie.Considering the important medicinal value and pleasant taste of Mount Tai-Rhizoma polygonati,various healthy and functional food products,controlled by quality markers with anti-COVID-19 potential,as well as emergency foods can be developed.The study aimed to review current evidence on the nutritional value of Rhizoma polygonati from Mount Tai and its usefulness as a traditional Chinese medicine,source of herbzyme,and potential remediating agent for COVID-19 and food shortage.Most recent findings regarding herbal nanomedicine have revealed that nanoscale chemical compounds are potentially efficient in drug delivery or nanozyme catalysis upon bioprocessing.Nanoflower structure is found in processed Rhizoma polygonati by self-assembly and has wide application in enzymatic events,particularly nanoscale herbzyme.The novel findings regarding Mount Tai-Rhizoma polygonati could enhance its novel applications in chronic and hidden hunger,clinical nanomedicine,and as an anti-COVID-19 agent.
基金National Natural Science Foundation of China(62005037)Chengdu University of Information Technology(KYTZ202180)+1 种基金National Key Research and Development Program of China(2019YFB2203400)111 Project(B20030)。
文摘Broadband absorbers generally consist of plasmonic cavities coupled to metallic resonators separated by a dielectric film,and they are vertically stacking configurations.In this work,we propose an ultra-broadband nanowire metamaterial absorber composed of an array of vertically aligned dielectric nanowires with coaxial metallic rings.The absorber shows strong absorption from 0.2 to 7μm with an average absorption larger than 91%due to the excitation of gap surface plasmon polariton modes in Fabry–Perot-like resonators.Moreover,a refractory dielectric cladding can be added to improve the thermal stability of the absorber,showing a negligible impact on its absorption performance.The proposed absorber may find potential applications in solar energy harvesting,infrared imaging and spectroscopy,and optoelectronic devices.
基金111 Project(B20030)National Natural Science Foundation of China(62075034)National Key Research and Development Program of China(2019YFB2203400)。
文摘Thermo-plasmonics, using plasmonic structures as heat sources, has been widely used in biomedical and microfluidic applications. However, a metasurface with single-element unit cells, considered as the sole heat source in a unit cell, functions at a fixed wavelength and has limited control over the thermo-plasmonically induced hydrodynamic effects. Plasmonic metasurfaces with metal disk heterodimer lattices can be viewed to possess two heat sources within a unit cell and are therefore designed to photo-actively control thermal distributions and fluid dynamics at the nanoscale. The locations of heat sources can be switched, and the direction of the convective flow in the central region of the unit cell can be reversed by shifting the wavelength of the excitation source without any change in the excitation direction or physical actuation of the structural elements. The temperature and velocity of a fluid are spatiotemporally controlled by the wavelength selectivity and polarization sensitivity of the plasmonic metasurface. Additionally, we investigate the effects of geometric parameters on the surface lattice resonances and their impact on the temperature and fluid velocity of the optofluidic system. Our results demonstrate excellent optical control of these plasmonic metasurface heating and thermal convection performances to design flexible platforms for microfluidics.
基金United States-Israel Binational Science Foundation(2018050)National Natural Science Foundation of China(62005037,62075034)。
文摘Circular dichroism (CD) is extensively used in various material systems for applications including biological detection,enantioselective catalysis,and chiral separation.This paper introduces a chiral absorptive metasurface that exhibits a circular polarization-selective effect in dual bands-positive and negative CD peaks at short wavelengths and long wavelengths,respectively.Significantly,we uncover that this phenomenon extends beyond the far-field optical response,as it is also observed in the photothermal effect and the dynamics of thermally induced fluid motion.By carefully engineering the metasurface design,we achieve two distinct CD signals with high g factors (1) at the wavelengths of 877 nm and 1045 nm,respectively.The findings presented in this study advance our comprehension of CD and offer promising prospects for enhancing chiral light–matter interactions in the domains of nanophotonics and optofluidics.
基金the National Natural Science Foundation of China (No.71473122)the National Social Science Foundation of China (Nos.17BJY010 and 17CJY032)"A project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).".
文摘There is growing concern that farmland transfers lead to less agricultural investment, which may adversely affect agricultural productivity growth in China.Prior research has primarily focused on the differences between owned cultivated land and rented plots,but little is known about how farmland transfers between relatives,which are popular in rural China,specifically affect agricultural investment.In this paper,we present a conceptual framework of transaction cost economics to compare different contracting strategies in China's farmland rental markets.As farmland rental markets in China are immature,land transfer between relatives establishes bilateral governance,which has the advantage of addressing the opportunistic activities of both parties and can ultimately increase investment by tenants.Based on data from two waves of household surveys,we empirically examine the impact of bilateral governance on the application of organic fertilizer,an indicator for agricultural investment.Our findings show that apart from economic factors, kinship is important to the functioning of farmland rental markets in rural areas.
