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Spiropyran-Containing Reusable and Wearable All-in-One Ultraviolet Monitoring and Shielding Textiles for Sun Protection

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Chinese Journal of Polymer science 2024年第12期42卷 1933-1940,I0008页

作者： Zhen Wu Kai-Feng Liao Le-Ping Xiao Shi-Jie Zhong Min Gong Guo-Jie Wang school of Materials science and engineering University of Science and Technology BeijingBeijing100083China school of Chemistry and biological engineering University of Science and Technology BeijingBeijing100083China

Moderate ultraviolet(UV)radiation from sunlight is essential for human health,but overexposure to UV rays can cause serious adverse *** is important to detect UV radiation from sunlight in time to prevent damage from excessive ***,a ready-to-use,easy-to-interpret,inexpensive,reusable,and wearable all-in-one UV monitoring and shielding sensor SP-TPE@PU textile has been *** SP-TPE@PU textiles are constructed by photochromic molecule SP-TPE and commercial polymer polyurethane(PU)through *** SP-TPE molecule acts as the sensor component,and PU contributes to high *** SP-TPE@PU textiles show remarkable durability(against repeated twisting,curling,bending deformations,and water immersion)and good permeability,making them durable and breathable wearable *** exposed to sunlight,the SP-TPE@PU textiles rapidly exhibit significant color changes due to the efficient isomerization of SP-TPE,serving as an early warning and monitoring of UV *** addition,the SP-TPE@PU textiles can revert to the initial state with visible light irradiation for ***,the SP-TPE@PU textiles possess excellent UV shielding ability,contributing to human body *** and easy operation,significant and reversible color changes,good breathability and mechanical properties make SP-TPE@PU textiles reusable and wearable all-in-one UV monitoring and shielding sensors.

关键词： Sunlight sensor Photochromic textiles Reusable and wearable Ultraviolet monitoring and shielding

In-situ green synthesis of highly active GSH-capped Pt–Au–Ag-hybrid nanoclusters

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science China Chemistry 2014年第11期57卷 1532-1537页

作者： CHEN DongHua GAO ShengPing UR REHMAN Fawad JIANG Hui WANG XueMei school of Chemistry and Chemical engineering Southeast University State Key Laboratory of Bioelectronics (Chien-Shiung Wu Lab) School of Biological Science and Medical EngineeringSoutheast University

Recently much attention has been paid to the application of metal hybrid nanoparticles in industrial catalytic fields because of their super-efficient catalytic activity and attractive properties. We explored a novel strategy to prepare GSH-capped Pt–Au–Ag-hybrid nanoclusters through the synergistic effect between ascorbic acid(VC) and glutathione(GSH) with chloroplatinic acid, chloroauric acid, and silver nitrate as precursors. The potential utilization of as-prepared GSH-capped Pt–Au–Aghybrid nanoclusters for catalytic applications has been evaluated through the reduction of 4-nitrophenol(4-NP) with NaBH4; we obtained the kinetic data by monitoring with UV-Vis spectroscopy. Our results illustrate that GSH-capped Pt–Au– Ag-hybrid nanoclusters could facilitate the process of reduction of 4-NP in a way that is unprecedented. This approach may offer a novel, non-cytotoxicity, efficient catalyst for industry.

关键词： Pt–Au–Ag-hybrid ascorbic acid glutathione 4-nitrophenol catalyst

3D numerical simulation of avascular tumour growth:effect of hypoxic micro-environment in host tissue

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Applied Mathematics and Mechanics(English Edition) 2013年第9期34卷 1055-1068页

作者：蔡彦吴洁龙泉许世雄李志勇 school of biological science and medical engineering Southeast University school of Naval Architecture Ocean and Civil Engineering Shanghai Jiao Tong University Brunel Institute for Bioengineering School of Engineering and DesignBrunel University Department of Mechanics and engineering science Fudan University

A three-dimensional （3D） mathematical model of tumour growth at the avascular phase and vessel remodelling in host tissues is proposed with emphasis on the study of the interactions of tumour growth and hypoxic micro-environment in host tissues. The hybrid based model includes the continuum part, such as the distributions of oxygen and vascular endothelial growth factors （VEGFs）, and the discrete part of tumour cells （TCs） and blood vessel networks. The simulation shows the dynamic process of avascular tumour growth from a fewinitial cells to an equilibrium state with varied vessel networks. After a phase of rapidly increasing numbers of the TCs, more and more host vessels collapse due to the stress caused by the growing tumour. In addition, the consumption of oxygen expands with the enlarged tumour region. The study also discusses the effects of certain factors on tumour growth, including the density and configuration of pre- existing vessel networks and the blood oxygen content. The model enables us to examine the relationship between early tumour growth and hypoxic micro-environment in host tissues, which can be useful for further applications, such as tumour metastasis and the initialization of tumour angiogenesis.

关键词： avascular tumour growth hypoxic micro-environment in host tissue three-dimensional (3D) mathematical model

Effect of mechanical stresses on degradation behavior of high-purity magnesium in bone environments

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Journal of Materials science & Technology 2024年第4期171卷 252-261页

作者： Yan Yao Jie Xia Lizhen Wang Yuanming Gao Xili Ding Chao Wang Yubo Fan Key Laboratory of Biomechanics and Mechanobiology(Beihang University) Ministry of EducationBeijing Advanced Innovation Center for Biomedical EngineeringSchool of Biological Science and Medical EngineeringSchool of Engineering MedicineBeihang UniversityBeijing 100083China

High-purity(HP)magnesium(Mg)has emerged as a promising biomaterial for supporting functional bone *** previous study found that mechanical stresses and the surrounding fibrotic tissue(subcuta-neous)both play crucial roles in the degradation of HP ***,due to challenges in the degradation and regeneration process in vivo,it remains unclear how stress affects HP Mg degradation in bone en-vironments,limiting its further *** this study,novel loading devices were designed and the effects of tensile and compressive stresses on HP Mg degradation in vivo and in vitro bone environments were quantitatively *** addition,bone osteointegration around HP Mg was explored *** stress increases the degradation rate of HP Mg in vivo and in *** Mg degradation in vivo is more sensitive to stress factors than in vitro,but the sensitivity decreases with corrosion *** volume loss rate of HP Mg is multilinear with the applied stress and degradation *** volume of bone tissue surrounding HP Mg is larger in the no-stress group compared to the stressed groups,which is more pronounced with increasing implantation *** results provide valuable insights for optimiz-ing the design of HP Mg-based implants considering load *** will help to achieve a balance between the degradation rate of the implant and the regeneration rate of the surrounding bone.

关键词： High-purity magnesium Quantitative stresses Degradation Bone environments In vivo and in vitro

Magnesium based degradable biomaterials： A review

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Frontiers of Materials science 2014年第3期8卷 200-218页

作者： Xue-Nan GU Shuang-Shuang LI Xiao-Ming LI Yu-Bo FAN Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education School of Biological Science and Medical Engineering Beihang University Beijing 100191 China

Magnesium has been suggested as a revolutionary biodegradable metal for biomedical applications. The corrosion of magnesium, however, is too rapid to match the rates of tissue healing and, additionally, exhibits the localized corrosion mechanism. Thus it is necessary to control the corrosion behaviors of magnesium for their practical use. This paper comprehensively reviews the research progress on the development of representative magnesium based alloys, including Mg-Ca, Mg-Sr, Mg-Zn and Mg-REE alloy systems as well as the bulk metallic glass. The influence of alloying element on their microstructures, mechanical properties and corrosion behaviors is summarized. The mechanical and corrosion properties of wrought magnesium alloys are also discussed in comparison with those of cast alloys. Furthermore, this review also covers research carried out in the field of the degradable coatings on magnesium alloys for biomedical applications. Calcium phosphate and biodegradable polymer coatings are discussed based on different preparation techniques used. We also compare the effect of different coatings on the corrosion behaviors of magnesium alloys substrate.

关键词： magnesium alloy degradable biomaterial coating degradation corrosion

Effective removal of heavy metals from aqueous solutions by orange peel xanthate

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Transactions of Nonferrous Metals Society of China 2010年第S1期20卷 187-191页

作者：梁莎郭学益冯宁川田庆华 school of Metallurgical science and engineering Central South University school of Basic medical science Ningxia Medical College

Preparation of orange peel xanthate and its adsorption behaviors of five heavy metals(Cu 2+ ,Cd 2+ ,Pb 2+ ,Zn 2+ and Ni 2+ ) were *** spectra,Zeta potentials and TG analysis were used to characterize prepared orange peel *** of various parameters including equilibrium pH,initial metal ion concentration and adsorption time on the adsorption processes for the five metal ions were *** was found that for all five metal ions,the adsorption isotherms agreed Langmuir model very well and the maximum adsorption capacities of Cu2 +,Cd 2+,Pb 2+,Zn 2+and Ni 2+were obtained as 77.60,76.57,218.34,49.85 and 15.45 mg/g,*** adsorption processes can attain equilibrium within 20 min and kinetics was well fitted by psesudo-second order *** is proposed that the adsorption mechanism was complexation.

关键词： orange peel xanthate adsorption heavy metals

Fatigue Analysis and Evaluation Method of Ergonomic Virtual Human

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Chinese Journal of Biomedical engineering(English Edition) 2016年第2期25卷 58-64页

作者： LI Yun ZU Xiao-qi ZHOU Qian-xiang school of biological science and medical engineering Beihang University

The ergonomic digital design and evaluation of man-machine system is the main application fields of virtual human technology. Because of the complexity of physical person and uncertainty of fatigue generation mechanism, it is difficult to express a nd evaluate the Virtual Human's fatigue state. This paper summarizes the characteristics of virtual human's fatigue evaluation, such as undeterminable, invisible, the constraint conditions can been used. Viewed from the strengths and weaknesses of preexisting models, metabolic energy expenditure model, dynamic muscle fatigue model and a model to assess fatigue at joint-level using the half-joint concept, this paper puts forward the future development trend that the combination of subjective and objective,diversificationoftheanalyzablemotion,real-timeandvisualexpression.

关键词： ergonomic virtual human fatigue human factor evaluation model physiological and psychological factors

Electromagnetically induced transparency and quadripartite macroscopic entanglement generated in a ring cavity

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Chinese Physics B 2013年第2期22卷 255-260页

作者：马永红周玲 school of Physics and Optoelectronics engineering Dalian University of Technology school of Mathematics Physics and Biological EngineeringInner Mongolia University of Science and Technology

We propose a feasible scheme to generate electromagnetically induced transparency（EIT） and quadripartite macroscopic entanglement in an optomechanical system with one fixed mirror and three movable perfectly reflecting *** explore the EIT phenomena in this optomechanical *** show the appearance of EIT dips in the output ***,we demonstrate how steady-state quadripartite entanglement can be generated via radiation *** also quantify the bipartite entanglement in each field-mirror subsystem and in the mirror-mirror *** show that a high intensity of entanglement between two subsystems can be achieved.

关键词： electromagnetically induced transparency optomechanical system quadripartite macroscopic entanglement

Effect of interaction and temperature on quantum phase transition in anisotropic square-octagon lattice

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Chinese Physics B 2015年第5期24卷 257-261页

作者：保安张雪峰章晓中 Laboratory of Advanced Materials School of Materials Science and Engineering Tsinghua University school of Mathematics Physics and Biological Engineering Inner Mongolia University of Science and Technology

We investigate the effect of interaction, temperature, and anisotropic parameter on the quantum phase transitions in an anisotropic square-octagon lattice with fermions under the framework of the single band Hubbard model through using the combination of cellular dynamical mean field theory and a continuous time Monte Carlo algorithm. The competition between interaction and temperature shows that with the increase of the anisotropic parameter, the critical on-site repulsive interaction for the metal-insulator transition increases for fixed temperature. The interaction-anisotropic parameter phase diagram reveals that with the decrease of temperature, the critical anisotropic parameter for the Mott transition will increase for fixed interaction cases.

关键词： anisotropic square-octagon lattice fermions quantum phase transition cellular dynamical mean field theory