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Preparation and surface modification of 3D printed Ti-6Al-4V porous implant

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Rare Metals 2021年第5期40卷 1164-1172页

作者： Chun-Yong Liang Xiao-Jing jiang rui-Long Ji Bao-E Li Xian-rui Zou hong-Shui Wang Jing-Zu Hao Tai Yang School of Materials Science and Engineering Hebei University of TechnologyTianjin 300130China Tianjin Key Laboratory of Laminating Fabrication and Interface Control Technology for Advanced Materials Hebei University of TechnologyTianjin 300130China

Three-dimensional(3D)printed titanium alloy implants hold enormous potential in orthopedic applications to avoid stress ***,titanium alloy is bioinert,limiting its application and making surface modification a *** this paper,porous implants were treated by acid etching and anodizing to improve the bioactivity,which was evaluated by simulated body fluid(SBF)immersion *** results showed that,after surface modification,micro-nanocomposite structures were obtained on the titanium surface,and after immersing in SBF for 2 weeks,the implants showed a drastically enhanced apatite forming ability,confirming improved ***,the surface structures were different at different positions and it is believed that this phenomenon is closely related to the different current densities of the surfaces during anodic *** research evaluates the effect of anodic oxidation at different voltages on the surface modification and provides a reference for improving the bioactivity of the medical porous implant surface prepared by 3 D printing.

关键词： Three-dimensional(3D)printing Porous implants Anodic oxidation Composite structure Current density

Strong and tough chitin hydrogel constructed by dehydration and rehydration strategy

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Nano Research 2024年第9期17卷 8192-8199页

作者： rui-rui Liu Li-Bo Mao Shu-hong Yu Division of Nanomaterials and Chemistry Hefei National Research Center for Physical Sciences at the MicroscaleDepartment of ChemistryInstitute of Biomimetic Materials and ChemistryAnhui Engineering Laboratory of Biomimetic MaterialsUniversity of Science and Technology of ChinaHefei 230026China Institute of Innovative Materials Department of Materials Science and EngineeringDepartment of ChemistrySouthern University of Science and TechnologyShenzhen 518055China

As a renewable,biocompatible,biodegradable soft material,chitin hydrogels have better advantages in stability,antibacterial activity,antifouling,cost,immunogenicity,and so on than most polymer ***,compared with other widely used polymer hydrogels with high strength and toughness,the practical applications of chitin-based hydrogels have been limited by their weak mechanical properties,such as cartilage repair and meniscus ***,we present the design and fabrication of chitin hydrogels with excellent mechanical strength and toughness by a dehydration and rehydration *** sequential dehydration and rehydration processes,the crystalline domains in the chitin hydrogels can be properly *** optimized crystallinity,the elastic modulus of the chitin hydrogels exceeds all previously reported values,and the fracture toughness is even comparable to some synthetic polymer hydrogels,while maintaining a high-water-content of about 80 wt.%.At the same water content,the mechanical properties of the chitin hydrogels are positively correlated with the hydrogel crystallinity,which proves that the change of mechanical properties of hydrogels is not simply dependent on weight *** hydrogels can be further strengthened by incorporating other biopolymers that are intrinsically weak,which makes the hydrogels promising for applications in fields such as cartilage repair and meniscus ***,the hydrogels enable loading and release of water-soluble and poorly water-soluble *** highly extendable strengthening and toughening strategy of chitin and chitin-based biopolymer hydrogels paves the way for their widely applications.

关键词： chitin hydrogel crystallinity rehydration chemical transformation strong and tough

Influences of Ignition Temperature, Urea-to-Metal Nitrates Molar Ratio, and Further Calcination on Synthesis of C_4AF via the SPCR Method

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Journal of Wuhan University of Technology(Materials Science) 2018年第5期33卷 1168-1175页

作者： LI Yang HE Zhen jiang rui State Key Laboratory of Water Resources ＆ Hydropower Engineering Science Wuhan UniversityWuhan 430072China Shaanxi Key Laboratory of Safety and Durability of Concrete Structures Xo＇ing UniversityXi＇an 710123China

The self-propagating combustion reaction（SPCR）method was employed to synthesize C4AF using metal nitrates as cation precursors and urea as *** decomposition behavior of dried gels,phase identification and crystallinity of synthesized C4AF,and impact of urea to metal nitrates（UR/MN）molar ratio on synthesis effect were investigated with the aid of differential thermogravimetric analysis,X-ray diffraction and Fourier transform inferred *** is found that pure C4AF can be prepared by the SPCR method in 2 h at 500℃.The UR/MN molar ratio plays a significant role in the thermal decomposition behavior of dried gel,purity,crystallinity and crystallite size of synthesized *** temperature should be not lower than 500℃but higher temperatures were *** trace of free lime in synthesized C4AF is detected and calcium carbonate is the transition *** calcining the synthesized C4AF at high temperatures is beneficial for increasing crystallinity,purity and crystallite *** activation energy of the further calcination process is 119.6 kJ/*** is more efficient to improve the synthesis effect by increasing UR/MN molar ratio than further calcination at high temperatures.

关键词： C4AF combustion synthesis self-propagating brownmillerite purity low temperature

Efficient polymer-mediated delivery system for thiocyclam: Nanometerization remarkably improves the bioactivity toward green peach aphids

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Insect Science 2023年第1期30卷 2-14页

作者： Ye Wang Yong-Hui Xie Qin-hong jiang hong-Tao Chen rui-Hao Ma Zhi-jiang Wang Mei-ZhenYin Jie Shen Shuo Yan Department of Plant Biosecurity and MOA Key Lab of Pest Monitoring and Green Management College of Plant ProtectionChina Agricultural UniversityBejingChina Kunming Branch of Yunnan Provincial Tobacco Company KunmingChina State Key Lab of Chemical Resource Engineering Bejing Labof Biomedical MaterialsBejing Universityof Chemical TechnologyBejingChina

The unscientific application of synthetic pesticides has brought various negative effects on the environment,hindering the sustainable development of *** can be applied as carriers to improve pesticide delivery,showing great potential in the development of pesticide formulation in recent ***,a star polymer(SPc)was constructed as an efficient pesticide nanocarrier/adjuvant that could spontaneously assemble with thiocyclam or monosultap into a complex,through hydrophobic association and hydrogen bonding,respectively,with the pesticide-loading contents of 42.54%and 19.3%.This complexation reduced the particle sizes of thiocyclam from 543.54 to 52.74 nm for pure thiocyclam,and 3814.16 to 1185.89 nm for commercial preparation(cp)of ***,the introduction of SPc decreased the contact angles of both pure and cp thiocyclam on plant leaves,and increased the plant uptake of cp thiocyclam to 2.4–1.9 times of that without ***,the SPc could promote the bioactivity of pure/cp thiocyclam against green peach aphids through leaf dipping method and root *** leaf dipping method,the 50%lethal concentration decreased from 0.532 to 0.221 g/L after the complexation of pure thiocyclam with SPc,and that decreased from 0.390 to 0.251 g/L for cp *** seems a promising adjuvant for nanometerization of both pure and cp insecticides,which is beneficial for improving the delivery efficiency and utilization rate of pesticides.

关键词： adjuvant improved bioactivity pesticide nanocarrier pesticide nanometerization pesticide reduction

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从领域到属性:亲环境行为测量的问题及建议

心理科学进展 2025年第1期33卷 163-175页

作者：张玥董艺佳蒋奖华北电力大学经济与管理学院北京102206 香港城市大学社会与行为科学系香港北京师范大学心理学部应用实验心理北京市重点实验室心理学国家级实验教学示范中心(北京师范大学)北京100875

已有研究开发了大量的亲环境行为测量工具,涉及量表、个体行为范式和群体博弈范式,其中大多数测量工具是基于行为领域设计,节约、出行、垃圾处理、消费和公域行为是5个最常被提及的领域。现有依据行为领域的亲环境行为测量方式存在标准... 详细信息

已有研究开发了大量的亲环境行为测量工具,涉及量表、个体行为范式和群体博弈范式,其中大多数测量工具是基于行为领域设计,节约、出行、垃圾处理、消费和公域行为是5个最常被提及的领域。现有依据行为领域的亲环境行为测量方式存在标准化程度低及测量结果推广性受限的问题,这主要是由于缺少对行为属性这一行为决定性特征的关注。未来研究应基于行为属性选用和开发标准化测量工具,并选取多种真实行为作为效标进行效度检验。

关键词：亲环境行为行为领域行为属性测量

Dynamic analysis of tethered defunct satellites with solar panels

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Astrodynamics 2024年第2期8卷 297-309页

作者： rui Qi Yang Zhang Heng jiang rui Zhong School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081China School of Aerospace Astronautics Beihang UniversityBeijing 100191China

A precise dynamic model for towing and removing a defunct satellite with solar panels in orbit using a tethered net often has low computational efficiency owing to the complex contact and collision between the net and panels,which is not conducive to *** solve this problem,a“single main tether–multiple subtether”bifurcation structure with beads was employed as the tethered net *** study investigated the dynamics of tethered defunct satellites with solar panels,particularly the behavior of the attitude of the tethered satellite,oscillation of the main tether,and vibration of solar panels under different *** results showed that different attachment configurations of the subtethers and the flexibility of the main tether have an evident impact on the dynamic characteristics of the system.

关键词： space debris flexible solar panels tethered towing Kane’s method dynamics modeling

Chengru Feng： The founder of biologica illustration in China

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Protein & Cell 2016年第5期7卷 311-313页

作者： hong jiang Center for Culture Science and Technology Sichuan University Chengdu 610065 China

The eighteenth and nineteenth century was the heyday of biological illustration in western world. However, China did not have the tradition of scientific biology as early as the West, though it had a long history of herbalism. Biology was not introduced into this country until the late nineteenth century, around the end of Qing Dynasty, while the practice of biological illustration was even much later than that.

关键词： founder illustration country

Dejun Yu： a patriotic botanist and his contributions

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Protein & Cell 2017年第11期8卷 785-787页

作者： hong jiang Center for Culture Science and Technology Sichuan University Chengdu 610065 China

Dejun Yu （Te-tsun Yu, Feb. 1, 1908-July 14, 1986） was a famous plant taxonomist and horticulturist in China as well as an expert on botanical gardens （Fig. 1）. As a patriotic scientist, Dejun Yu refused a position in Britain and returned to China without hesitation in 1950. He devoted his whole life to the botanical sciences. His contributions went far beyond advancing botany, however, extending to construction of botanical gardens and the exploration of plant resources, especially fruit trees in China. His research was closely connected to the scientific and economic development of his country.

关键词： Dejun Yu a patriotic botanist his contributions

Dynamic Rheological Behavior of Low Water-to-binder Ratio Mortars under Large Amplitude Oscillatory Shear(LAOS)

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Journal of Wuhan University of Technology(Materials Science) 2018年第3期33卷 608-618页

作者：何真 jiang rui LI Yang State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan University

This work focuses on the dynamic rheological behavior of low water-to-binder ratio cement mortars blended with fly ash microspheres（FAM） or silica fume（SF）. The initial slump flow of each group has been controlled at similar values by adjusting the superplasticizer dosages. With the help of a coaxial cylinder rheometer, the dynamic rheological behaviors of these mortars are investigated by frequency sweeping in the range of 0-2 Hz under large amplitude oscillatory shear（LAOS）. Based on the systematical elaboration of dynamic rheological testing theory, the experimental data are processed according to Lissajous plot fitting to reveal the viscoelastic characteristics. The nonlinearity of response signals is further assessed with Fourier transform（FT） analysis. The parameters, storage modulus G＇, loss modulus G＂ and relative amplitude I3/I1 are proposed to clarify the influences of FAM and SF on the stability and energy consumption of local structures and nonlinearity of response torques. The hydration characteristics of various groups well confirmed the rheological phenomenon. This study is beneficial for the preparation and optimization of flow state concrete such as pumping concrete and self-compacting concrete.

关键词： dynamic rheology viscoelastic behavior LAOS mortar mineral admixture Lissajous plots Fourier transform