|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Single atom accelerates ammonia photosynthesis显示文摘Atomically dispersed metal has gained much attention because of the new opportunities they offer in catalysis. However, it is still crucial to understand the mechanism of single-atom catalysis at molecular level for expanding them to other more difficult catalytic reactions, such as ammonia synthesis from nitrogen. In fact, developing ammonia synthesis under ambient conditions to overcome the high energy consumption in well-established Haber-Bosch process has fascinated scientists for many years.Herein, we demonstrate that single Cu atom yields facile valence-electron isolation from the conjugated π electron cloud of p-CN. Electron spin resonance measurements reveal that these isolated valence electrons can be easily excited to generate free electrons under photo-illumination, thus inducing high efficient photo-induced ammonia synthesis under ambient conditions.The NH_3 producing rate of copper modified carbon nitride(Cu-CN) reached 186 μmol g^(-1) h^(-1) under visible light irradiation with the quantum efficiency achieved 1.01% at 420 nm monochromatic light. This finding surely offers a model to open up a new vista for the ammonia synthesis at gentle conditions. The introduction of single atom to isolate the valence electron also represents a new paradigm for many other photocatalytic reactions, since the most photoinduced processes have been successfully exploited sharing the same origin. | Pengcheng Huang Wei Liu Zhihai He Chong Xiao Tao Yao Youming Zou Chengming Wang Zeming Qi Wei Tong Bicai Pan Shiqiang Wei Yi Xie | 2018 | Science China Chemistry2018，61，9： | 8 |
| 2 | Single small molecule-assembled nanoparticles mediate efficient oral drug delivery显示文摘Oral drug delivery,which requires surviving the harsh environment in the gastrointestinal(Gl)tract and penetrating the intestinal epithelium,has not bee n achieved using simple formulatio n nan oparticles(NPs).Medici nal natural products(MNPs)have bee n widely used in traditi onal medicine for disease management through oral consumption.However,most pharmacologically active compounds within MNPs do not have the properties suitable for oral applicatio ns.We hypothesize that some MNPs contain n atural nano materials that can convert those compounds into oral formulations by forming NPs.After screening 66 MNPs,we identified five classes of small molecules that form NPs,many of which are capable of efficient drug encapsulation and Gl penetration.We show that one of them,dehydrotrametenolic acid(DTA),is capable of mediating oral delivery for effective disease treatment.We determined that DTA NPs assemble through hydrogen bonding and penetra怕the Gl tract via apical sodium-depe ndent bile acid tran sporter.Our study reveals a no vel class of single comp orient,small molecule-assembled NPs for oral drug delivery,and suggests a n ovel approach to modernizi ng MNPs through nano material discovery. | Xin Yang Chao Ma Zeming Chen Jun Liu Fuyao Liu Rongbin Xie Haitian Zhao Gang Deng Ann TChen Ningbo Gong Lei Yao Pengjian Zuo Kangkang Zhi Jiacheng Wang Xiaobin Gao Jing Wang Louzhen Fan Jiangbing Zhou | 2019 | Nano Research2019，12，10： | 4 |
| 3 | Why choose 3D bioprinting?Part II:methods and bioprinters显示文摘Classification of 3D bioprinting As we mentioned in the last editorial,3D printing,also known as additive manufacturing,could be considered as the reverse process of potato cutting,automatically assembling sliced potato,shredded potato,diced potato to integrity[1].Generally speaking,cell-laden 3D bioprinting can be classified into three types:extrusion-based,droplet-based and photocuring-based bioprinting according to different printing principles.Extrusion-based bioprinting squeezes out continuous hydrogel fibers to set up structures;dropletbased bioprinting generates droplets as the basic unit for biofabrication;and photocuring-based bioprinting utilizes the characteristics of light-sensitive materials,to stack 3D models layer-by-layer.Different bioprinting approaches own diverse characteristics facing various scenarios and have specific requirements for bioinks. | Yong He Zeming Gu Mingjun Xie Jianzhong Fu Hui Lin | 2020 | Bio-Design and Manufacturing2020，3，1： | 2 |
| 4 | FDTD Analysis of EW Wave Circulating by a Magnetized Ferrite Body in Free Space显示文摘 | Rushan Chen Edward K. N. Yung Zeming Xie Yong Wang | 1998 | International Journal of Infrared and Millimeter Waves1998，，2： | 1 |
| 5 | P-Wave Velocity in Rocks of Dabieshan, China at High Pressure and High Temperature: Constraints for Composition of Lower Crust and Crust-Mantle Recycling显示文摘P-wave velocities in the rocks of Dabieshan, central China were measured at pressures up to 5.0 GPa and temperatures up to 1 300℃. The ultrahigh pressure eclogites have the highest density and P-wave velocity (Vp) and lower anisotropy. Pressure derivatives of the eclogites range from 0. 22 to 0. 33 km. s-1 GPa-1. Average temperature derivative of the eclogites is - 3. 41×10-4 km. s-1. °C -1. The density and VP of the eclogites imply that there will be two united possibilities related to crust-mantle recycling after the eclogite formed in the deep lithosphere. One is that some eclogites in the deep lithosphere were detached and sunk into deeper mantle due to their denser density. Another is that some eclogites returned to the crust and exposed to the surface.Small amounts (<12%) of eclogites may be still exist in the deep crust beneath Dabieshan based on our calculation. | Zhao Zhidan Zhou Wenge Xie Hongsen Guo Jie Xu Zuming(Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002)Zhang Zeming(Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037) | 1999 | Journal of Earth Science1999，18，4： | 1 |
| 6 | High Selectivity Cascaded Quadruplet Bandpass Filter with Three Pairs of Transmission Zeros显示文摘A novel microstrip Cascaded quadruplet(CQ) bandpass filter using quarter wavelength resonators and three-quarter wavelength resonators is proposed.Based on cross coupling and source-load coupling,three pairs of finite transmission zeros are generated at the stopband.As a result,the out-of-band rejection can be enhanced and high selectivity is achieved.Based on the proposed structure,a cascaded quadruplet filter centering at 3.0GHz is designed and fabricated.Good agreement between the measured and simulated data is obtained. | CHEN Jianfeng CHEN Fuchang LI Runshuo XIE Zeming CHU Qingxin | 2017 | Chinese Journal of Electronics2017，26，5： | 0 |
| 7 | A bionic controllable strain membrane for cell stretching at air–liquid interface inspired by papercutting显示文摘Lung diseases associated with alveoli,such as acute respiratory distress syndrome,have posed a long-term threat to human health.However,an in vitro model capable of simulating different deformations of the alveoli and a suitable material for mimicking basement membrane are currently lacking.Here,we present an innovative biomimetic controllable strain membrane(BCSM)at an air–liquid interface(ALI)to reconstruct alveolar respiration.The BCSM consists of a high-precision three-dimensional printing melt-electrowritten polycaprolactone(PCL)mesh,coated with a hydrogel substrate—to simulate the important functions(such as stiffness,porosity,wettability,and ALI)of alveolar microenvironments,and seeded pulmonary epithelial cells and vascular endothelial cells on either side,respectively.Inspired by papercutting,the BCSM was fabricated in the plane while it operated in three dimensions.A series of the topological structure of the BCSM was designed to control various local-area strain,mimicking alveolar varied deformation.Lopinavir/ritonavir could reduce Lamin A expression under over-stretch condition,which might be effective in preventing ventilator-induced lung injury.The biomimetic lung-unit model with BCSM has broader application prospects in alveoli-related research in the future,such as in drug toxicology and metabolism. | Yuanrong Li Mingjun Xie Shang Lv Yuan Sun Zhuang Li Zeming Gu Yong He | 2023 | International Journal of Extreme Manufacturing2023，5，4： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员