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Metal-organic frameworks incorporated with C3N4:A visible light enhanced platform for degradation of polybromodiphenyl ethers

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Journal of Environmental Sciences 2023年第12期134卷 44-54页

作者： Akese Emmanuel Meiying Yang Tingting Xu qi shen Chunyan Sun School of Chemistry and Chemical Engineering Shaoxing UniversityShaoxing 312000China School of Chemistry and Chemical Engineering Institute of New EnergyShaoxing UniversityShaoxing 312000China

A series of nano-photocatalysts metal-organic frameworks(MOFs)/graphitic carbon nitride(CN)(named MOFCN-x) with high activity have been synthesized by in-situ growth *** visible light irradiation, MOFCN-x hybrids show enhanced photocatalytic activity for the debromination of polybromodiphenyl ethers(PBDEs) compared with CN. Among all the hybrids, MOFCN-2 shows the highest reaction rate, which is 3.3 times as high as that in CN. MOFCN-x photocatalysts own stable visible light activity after recycled experiment. It indicates that a moderate amount of MOFs in MOFCN-x can largely enhance the photocatalytic ability by improved visible light absorption, larger specific surface area and better photo-generated charge carriers separation and transfer capabilities. More interestingly,the debromination pathway of PBDEs by MOFCN-x shows obvious selectivity compared with pure CN that bromines at meta-positions are much more susceptible than those at the paraand ortho-positions. The possible photoreductive mechanism has been proposed. This study shows that nanocomposite MOFCN can be an excellent candidate for dealing with halogen pollutants by solar-driven.

关键词： Graphitic carbon nitride Metal-organic frameworks Photocatalytic reduction Polybromodiphenyl ethers Visible light

Current situation and challenge of registry in China

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Frontiers of Medicine 2014年第3期8卷 294-299页

作者： Yang Zhang Yuji Feng Zhi qu Yali qi Siyan Zhan Department of Epidemiology and Biostatistics School of Public Health Peking University Health Science Centre Beijing 100191 China Pfizer Investment Co. Ltd. Beijing 100010 China Department of Epidemiology School of Public Health Beihua University Jilin 132001China

Increasing emphasis has been placed on registries for an organized system used in developing clinical research to improve health care. China has sufficient data that can be applied broadly, but the heterogeneity and irregularity of registries limit their applicability. This article aims to describe the status of registries in China and the related challenges. Patient registries for observational studies were retrieved from the International Clinical Trials Registry to quantitatively evaluate the number of comparatively high-quality registries in China. A literature search was also performed to provide support and updates. A total of 64 patient registries were retrieved from *** using disease, product, and health service as criteria. The sample sizes ranged from 15 to 30 400, with only 12 registries marked as completed. This article describes and compares the detailed information in many aspects. The efficient use of registries has already made considerable progress in China; however, registries still require standardization, high-quality transition, and coordinated development.

关键词： Chinese registry study patient registries observational study

Hardware-based high-performance string lookup with value retrieval using extended Bloom filter

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The Journal of China Universities of Posts and Telecommunications 2008年第2期15卷 97-101页

作者： LI qi-yue qu Yu-gui ZHAO Bao-hua Department of Electronic Engineering and Information Science University ofScience and Technology of China Hefei 230027 China Department of Computer University of Science and Technology of ChinaHefei 230027China

in network packet processing, high-performance string lookup systems are very important. In this article, an extended Bloom filter data structure is introduced to support value retrieval string lookup, and to improve its performance, a weighted extended Bloom filter （WEBF） structure is generalized. The optimal configuration of the WEBF is then derived, and it is shown that it outperforms the traditional Bloom filter. Finally, an application-specific integrated circuit （ASIC）-based technique using WEBF is outlined.

关键词： Bloom filter value retrieval string lookup Hash function ASIC

asy and asyip:A new type of apoptosis-inducing gene

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Chinese Science Bulletin 2001年第17期46卷 1409-1411页

作者： Bing qi Yipeng qi qinzheng Liu Xiaoling qu Wuhan Univ Inst Virol Wuhan 430072 Peoples R China

Apoptosis,,a wide physiological process in multicel-lular organisms, is critical for the organ development, the cell senescence, the tissue homeostasis and the resistance to infection of virus and bacteria. Apoptosis plays a key role in the regulation of the growth cell number such as the tissue construction, the elimination of abnormal or dangerous cells. Therefore, apoptosis is a stringent and effective cell quality controlling system, which reduces the number of harmful cells to the maximum, such as auto-immunity cell, cells infected by virus, tumor cells by cell suicide111. Apoptosis can be initiated by a wide variety of the extracellular and intracellular stimuli, including the developmental signals, the cellular stress and the disruption of cell cycle, transduced and amplified by the second messengers, and finally finished by the activating death effector protease. This process can be called apoptosis signal network. The defective in control of the apoptotic pathways may contribute to a variety

关键词： gene cell type

Seismic analysis of early-mid Miocene carbonate platform in the southern qiongdongnan Basin, South China Sea

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Acta Oceanologica Sinica 2018年第2期37卷 54-65页

作者： WU Xiaochuan PU Renhai CHEN Ying qu Hongjun shen Huailei State Key Laboratory of Continental Dynamics Department of Geology Northwest University Xi'an 710069 China CNNOOC Research Institute Beijing 100028 China

The southern uplift of the qiongdongnan Basin is a deepwater area in which no wells have beens drilled. The Miocene-quaternary strata in the Xisha Islands, which are located 40–100 km to the south, are composed of carbonate reef formations. Paleotectonic and paleogeographic analyses of the basin suggest that the southern uplift experienced favorable geological conditions for the development of carbonate reefs during the *** high-impedance carbonates have high amplitudes and low frequencies on seismic profiles. The reefs are distributed on paleotectonic highs and are thicker than the contemporaneous formations. A forward model of the variation in carbonate thickness based on lithological and velocity information from wells in nearby regions can simulate the seismic response of carbonates with different thicknesses. We identified several important controlling points for determining the thickness of carbonates from seismic profiles, including the pinchout point,the λ/4 thickness point, and the λ/2 thickness point. We depict a carbonate thickness map in the deepwater area of the southern qiongdongnan Basin based on this model. The carbonate thickness map, the paleotectonic and paleogeographic background, and the seismic response characteristics of reefs suggest that the carbonates that developed on the southern uplift of the qiongdongnan Basin during the Miocene were mainly an isolated carbonate platform peninsula and ramp deposits. It consisted of gentle ramp platform, steep slope platform,platform depression, gravity flow, and reef bank facies.

关键词： forward model carbonate rock thickness facies distribution qiongdongnan Basin

Applying systematic conservation planning to constitute a protection strategy for broad-leaved Korean pine forests in Changbai Mountains, China

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Journal of Mountain Science 2016年第3期13卷 493-507页

作者： MA Lin SUN Gong-qi qu Yi LI Jun-qing Beijing university of civil engineering and architecture library Beijing 100044China Key Laboratory for Silviculture and Conservation of Ministry of Education Forest College Beijing Forestry University Beijing 100083 China Nature conservation College Beijing Forestry University Beijing 100083 China National and Local Joint Engineering Laboratory of Wetland and Ecological Conservation Heilongjiang Academy of sciences - Institute of Nature and Ecology Harbin 150040 China

The broad-leaved Korean pine(Pinus koraiensis) forest is one of the most biodiverse zonal communities in the North Temperate Zone and an important habitat for many endangered ***-leaved Korean pine forests(BKPFs) are shrinking quickly due to deforestation and rapid urbanization. Thus, scientific protection strategies are urgently needed to change this status. Changbai Mountains contains one of the largest BKPFs and is considered a priority biodiversity conservation area in China. Guided by systematic conservation planning(SCP) methods and procedures, we chose representative species and communities in BKPFs ecosystem as priority conservation objects, and set quantitative conservation target, which is in the light of the biodiversity characteristic of BKPFs. The watershed area is used as planning unit. We used CPlan software to calculate the irreplaceability(Ir)value of each planning unit and the contribution value(Ti) of each conservation object to(1) assess the conservation efficiency;(2) identify the conservation gap of the existing conservation network. Then wecalculated a human disturbance index(HDI) for planning units in the conservation gaps and combine this with the Ir value to design three conservation scenarios to optimize the conservation *** show that planning units with high conservation value 14.16% of the total area, with3084.36 km2 were covered by the existing conservation network. 79.28% of planning units with high conservation value have not been protected which were concentrated mainly in the eight gap *** 25.3% of protection objects achieved their conservation target with the existing conservation network. Conservation efficiency is low. Three conservation scenarios are constituted, each prioritizing a different aim:(1) ecological value;(2)species rescue; and(3) economical avoidance. The three conservation schemes potentially enable 93%,88% and 51% of conservation objects, respectively, to achieve identified conservatio

关键词： Korean Pine Changbai Mountain Systematic conservation planning Conservation network Protection strategy Conservation efficiency

Performance analysis and application on Ti-6Al-4V of micro-forging system

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Chinese Journal of Aeronautics 2021年第6期34卷 188-198页

作者： Yufei GUI qi LIU Yun ZHU Sulin CHEN Bin shen School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China

Micro-forging(MF)is a novel surface modification technology which is capable of smoothening and strengthening the workpiece surface *** on analysis of the mechanism and energy conversion of micro-forging process,an electromagnetically driven microforging system is *** further grasp the kinetic characteristic of the equipment,a simulation model is established and its accuracy is *** the help of simulation and experimental results,we propose an input voltage optimization method,which drives the micro-forging head moving in a uniform and stable *** this study,the influence of MF on surface integrity of Ti-6 Al-4 V(TC4)is firstly *** results show that MF treatment reduces surface roughness(Ra)and increases micro-hardness by 48%and 11.8%at most,***,a compressive stress layer with an amplitude of-1000 MPa and a depth of 0.8 mm is *** study analyzes the performance and reveals the potential of micro-forging technology,which lays a solid foundation for expanding its application in TC4 surface modification.

关键词： Input voltage Micro-forging system Performance analysis Surface integrity Titanium alloy

Phase and structure modulating of bimetallic Cu/In nanoparticles realizes efficient electrosynthesis of syngas with wide CO/H_(2) ratios

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Nano Research 2022年第1期15卷 528-534页

作者： Chenqi shen Pengtang Wang Leigang Li Xiaoqing Huang qi Shao College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China

Syngas(CO+H_(2))is the incredibly important feedstock for producing synthetic fuels and various value-added ***_(2) electrochemical reduction to syngas is an environmental-friendly and sustainable approach,but still challenging to produce tunable syngas with a wide ratio of CO+H_(2).Herein,by modulating the structure and phase,we have successfully obtained a series of copper-indium(Cu-ln)catalysts,which are efficient for producing syngas with tunable CO+H_(2) ratios.A series of Culn bimetallic catalysts with different structures from hollow sphere to two-layer hollow sphere and different phases from CuO to CU_(2)O are *** find that the CO and H2 are the only gaseous products,in which the CCD/H_(2) ratios can be readily tuned from 1.2±0.1 to 9.0±1.5 by simply controlling the thermal annealing *** also exhibits high durability during a 10-h *** unique performance is attributed to the modulated In enrichment on the Cu surfaces during the CO_(2) reduction reaction,which causes the differences in binding energies for key reaction intermediates,thus resulting in the tunable composition of *** present work emphasizes a simple yet efficient phase and structure modulating strategy for designing potential electrocatalysts for producing syngas with widely tunable CO+H_(2) ratios.

关键词： copper indium phase-engineering CO_(2)reduction syngas

Responsive Composite Janus Cages

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Chinese Journal of Polymer Science 2015年第10期33卷 1462-1469页

作者： qi-guang Wang 梁福鑫 qian Wang Xiao-zhong qu 杨振忠 State Key Laboratory of Polymer Physics and Chemistry Institute of Chemistry Chinese Academy of Sciences

pH responsive composite Janus cages of PS-silica-PEO are prepared using silica nanoparticles to crosslink two PAA contained di-block copolymers at an emulsion interface sequentially. Transverse channels are in situ created across the shell, which facilitates mass transfer. Shell is pH responsive owing to the presence of residual PAA chains tethered onto the silica nanoparticles. The Janus cages are capable to preferentially capture oil from their aqueous surroundings. The saturation absorption capacity is determined by pH and oil property. Other composite Janus cages are expected by extension the method using other copolymers and functional nanoparticles.

关键词： Janus cages Block copolymer Composited pH response Emulsion.