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Sodium cellulose sulfate: A promising biomaterial used for microcarriers' designing

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Frontiers of Chemical Science and Engineering 2019年第1期13卷 46-58页

作者： qing-xi Wu Yi-xin Guan Shan-Jing Yao Key Laboratory of Biomass Chemical Engineering of Ministry of Education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China School of Life Sciences Anhui UniversityAnhui Key Laboratory of Modem BiomanufacturingKey Laboratory of Eco-engineering and Biotechnology of Anhui ProvinceHefei 230601China

Due to a worldwide focus on sustainable materials for human health and economy services, more and more natural renewable biomass are regarded as promising materials that could replace synthetic polymers and reduce global dependence on petroleum resources. Cellulose is known as the most abundant renewable polymer in nature, varieties of cellulose-based products have been developed and have gained growing interest in recent years. In this review, a kind of water-soluble cellulose derivative, i.e., sodium cellulose sulfate (NaCS) is introduced. Details about NaCS's physicochemical properties like solubility, biocompatibility, biodegradability, degree of substitution, etc. are systematically elaborated. And promising applications of NaCS used as biomaterials for microcarriers' designing, such as microcell- carriers, micro-drug-carriers, etc., are presented.

关键词： sodium cellulose sulfate biomaterial physicochemical properties microcarriers

Compound of icariin,astragalus,and puerarin mitigates iron overload in the cerebral cortex of Alzheimer＇s disease mice

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Neural Regeneration Research 2018年第4期13卷 731-736页

作者： Yu Zhang Wei-Na Kong xi-qing Chai Department of Neurology the First Hospital of Hebei Medical University Shijiazhuang Hebei Province China Hebei Chemical and Pharmaceutical College Shijiazhuang Hebei Province China

Increasing evidence indicates that disruption of normal iron homeostasis may contribute to pathological development of Alzheimer＇s ***,astragalus,and puerarin have been shown to suppress iron overload in the cerebral cortex and improve spatial learning and memory disorders in Alzheimer＇s disease mice,although the underlying mechanism remains *** the present study,APPswe/PS1ΔE9 transgenic mice were administered icariin,astragalus,and puerarin（120,80,and 80 mg/kg,respectively,once a day,for 3 months）.Iron levels were detected by flame atomic absorption ***-1β,interleukin-6,and tumor necrosis factor-α levels were measured in the cerebral cortex by enzyme linked immunosorbent *** peroxidase and superoxide dismutase activity and malondialdehyde content were determined by *** results demonstrate that after treatment,iron levels and malondialdehyde content are decreased,while glutathione peroxidase and superoxide dismutase activities are ***,interleukin-1β,interleukin-6,and tumor necrosis factor-α levels were *** results confirm that compounds of icariin,astragalus,and puerarin may alleviate iron overload by reducing oxidative stress and the inflammatory response.

关键词： nerve regeneration Alzheimer's disease iron overload icariin astragalus puerarin oxidative stress inflammatory response neural regeneration

Effect of Tempering Temperature on Microstructure and Mechanical Properties of Steel Containing Ni of 9%

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Journal of Iron and Steel Research International 2011年第9期18卷 47-51,58页

作者： ZHAO xi-qing PAN Tao WANG qing-feng SU Hang YANG Cai-fu YANG qing-xiang State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao066004HebeiChina Division of Structural Material Research Central Iron and Steel Research InstituteBeijing 100081China

Mechanical properties of quenching,intercritical quenching and tempering （QLT） treated steel containing Ni of 9% were evaluated from specimens subject to various tempering temperatures. The detailed microstructures of steel containing Ni of 9% at different tempering temperatures were observed by optical microscope （OM） and transmission electron microscope （TEM）. The volume fraction of austenite was estimated by XRD. The results show that high strength and cryogenic toughness of steel containing Ni of 9% are obtained when the tempering temperature are between 540 and 580 ℃. The microstructure keeps the dual phase lamellar structure after the intercritical quenching and there is cementite created in the Ni-rich constituents when tempering temperature is 540 ℃. When tempering temperatures are between 560 and 580 ℃,the reversed austenites （γ′） grow up and the dual phase lamellar structure is not clear. The γ′ becomes instable at 600 ℃. When tempered at temperature ranging from 500 to 520 ℃,the increase of dislocation density in the lamellar matrix makes both tensile strength and yield strength decrease. When tempered at 540 ℃ and higher temperature,the yield strength decreases continuously because the C and alloying elements in the matrix are absorbed by the cementite and the γ′,so the yield ratio is decreased by the γ′. There are two toughness mechanisms at different tempering temperatures. One is that the precipitation of cementite absorbs the carbon in the steel which plays a major role in improving cryogenic toughness at lower temperature. Another is that the γ′ and the purified matrix become major role at higher tempering temperature. When the tempering temperature is 600 ℃,the stability of γ′ is decreased quickly,even the transformation takes place at room temperature,which results in a sharp decrease of Charpy-V impact energy at 77 K. The tempering temperature range is enlarged by the special distribution of cementite and the lamellar structure.

关键词： steel containing Ni of 9% tempering temperature cementite reversed austenite cryogenic toughness

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Genome-wide identification and characterization of the abiotic-stress-responsive lipoxygenase gene family in diploid woodland strawberry(Fragaria vesca)

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Journal of Integrative Agriculture 2022年第7期21卷 1982-1996页

作者： LI Zhi-qi xiE Qian YAN Jia-hui CHEN Jian-qing CHEN qing-xi College of Horticulture Fujian Agriculture and Forestry UniversityFuzhou 350002P.R.China Horticultural Plant Biology and Metabolomics Center of Haixia Institute of Science and Technology Fujian Agriculture and Forestry UniversityFuzhou 350002P.R.China

Lipoxygenase(LOXs)is a kind of dioxygenase without heme and iron,which plays an important role in the development and adaptation of many plants to the ***,the study of strawberry LOX gene family has not been *** this study,14 LOX genes were identified from the diploid woodland strawberry *** phylogenetic tree divides the FvLOX gene into two subfamilies:9-LOX and *** duplication event analysis showed that whole-genome duplication(WGD)/segmental duplication and dispersed duplication effectively promoted the expansion of strawberry LOX ***-PCR analysis showed that FvLOX genes were expressed in different *** profile analysis showed that FvLOX1 and FvLOX8 were up-regulated under low temperature stress,FvLOX3 and FvLOX7 were up-regulated under drought stress,FvLOX6 and FvLOX9 were up-regulated under salt stress,FvLOX2,FvLOX3 and FvLOX6 were up-regulated under salicylic acid(SA)treatment,FvLOX3,FvLOX11 and FvLOX14 were up-regulated under methyl jasmonate(MeJA)treatment,FvLOX4 and FvLOX14 were up-regulated under abscisic acid(ABA)*** analysis showed that FvLOX genes were involved in plant growth and development and stress *** analyzed and identified the whole genome of strawberry FvLOX family and characterized a variety of FvLOX candidate genes involved in abiotic stress *** study laid a theoretical and empirical foundation for the response mechanism of strawberry to abiotic stress.

关键词： lipoxygenase gene family strawberry abiotic stress expression pattern cis-acting element

Analyzing architectural diversity in maize plants using the skeletonimage-based method

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Journal of Integrative Agriculture 2023年第12期22卷 3804-3809页

作者： LIU Min-guo Thomas CAMPBELL LI Wei WANG xi-qing College of Biological Sciences China Agricultural UniversityBeijing 100193P.R.China Frontier Technology Research Institute of China Agricultural University in Shenzhen Shenzhen 518000P.R.China Center for Crop Functional Genomics and Molecular Breeding China Agricultural UniversityBeijing 100193P.R.China Department of Biology Northeastern Illinois UniversityChicago 60625USA

Shoot architecture in maize is critical since it determines resource use,impacts wind and rain damage tolerance,and affects yield *** the diversity among inbred lines in heterosis breeding is essential,especially when describing germplasm ***,traditional geometric description methods oversimplify shoot architecture and ignore the plant’s overall architecture,making it difficult to reflect and illustrate *** study presents a new method to describe maize shoot architecture and quantifies its diversity by combining computer vision algorithms and persistent *** results reveal that persistent homology can capture key characteristics of shoot architecture in maize and other details often overlooked by traditional geometric *** on this method,the morphological diversity of shoot architecture can be mined(quantified),and the main shoot architecture types can be ***,this method can easily describe the diversity of shoot architecture in many maize materials.

关键词： maize shoot architecture persistent homology phenotyping technology morphological diversity

Thermal transport in organic/inorganic composites

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Frontiers in Energy 2018年第1期12卷 72-86页

作者： Bin LIU Lan DONG qing xi xiangfan XU Jun ZHOU Baowen LI Center for Phononics and Thermal Energy Science China-EU JointCenter for Nanophononics Shanghai Key Laboratory of SpecialArtificial Microstructure Materials and Technology School of PhysicsScience and Engineering Tongji University Shanghai 200092 China Department of Mechanical Engineering University of ColoradoBoulder CO 80309 USA

Composite materials, which consist of organic and inorganic components, are widely used in various fields because of their excellent mechanical properties, resistance to corrosion, low-cost fabrication, etc. Thermal properties of organic/inorganic composites play a crucial role in some applications such as thermal interface materials for micro-electronic packaging, nano-porous materials for sensor development, thermal insulators for aerospace, and high-performance thermoelectric materials for power generation and refrigeration. In the past few years, many studies have been conducted to reveal the physical mechanism of thermal transport in organic/ inorganic composite materials in order to stimulate their practical applications. In this paper, the theoretical and experimental progresses in this field are reviewed. Besides, main factors affecting the thermal conductivity of organic/ inorganic compositcs are discussed, including the intrinsic properties of organic matrix and inorganic fillers, topolo- gical structure of composites, loading volume fraction, and the interfacial thermal resistance between fillers and organic matrix.

关键词： thermal conductivity organic/inorganic com-posites effective medium theory thermal percolationtheory interfacial thermal resistance

Effect of channel diameter on magneto-thermal conversion ratio and consistency of each strand in a multi-strand induction heating tundish

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Journal of Iron and Steel Research International 2023年第6期30卷 1199-1210页

作者： Pu Wang Hong xiao xi-qing Chen Hai-yan Tang Jia-quan Zhang School of Metallurgical and Ecological Engineering University of Science and Technology BeijingBeijing 100083China Magnetoelectric Research Institute Hunan Zhongke Electric Co.Ltd.Yueyang 414000HunanChina

The electromagnetic,flow,heat transfer and inclusions motion model of the channel-type induction heating(IH)tundish was established,and the effect of the channel diameter on the metallurgical behavior of the tundish was *** results show that the magnetic field in the channel of the IH tundish tends to concentrate on the surface layer and the side near the *** the channel diameter is increased from 100 to 180 mm,the maximum value of magnetic flux density in the channel decreases by 0.125 T,and the maximum value of electromagnetic force decreases by 11.83×10^(5) N m^(-3);however,the off-center distance of magnetic field increases by 9.4 mm,and the Joule heat in the channel decreases by 1004 kW,which leads to the reduction in temperature rising rate of the tundish from 1.41 to 0.59 K min^(-1).When the channel diameter is 100,140 and 180 mm,the maximum velocity at the channel exit before heating is 0.59,0.29 and 0.18 m s^(-1),and after heating for 1800 s,it is 1.52,1.12 and 0.92 m s^(-1),*** addition,the total inclusions escape ratio after heating for 1800 s with a channel diameter of 140 mm can be reduced by 12.39% compared to that before heating,and the maximum difference of escape ratios for each strand is only 4.51% and 5.32% before heating and after heating for 1800 s,*** with the channel diameters of 100 and 180 mm,the channel diameter of 140 mm is more favorable to improve the metallurgical effect of the IH tundish.

关键词： Induction heating tundish Channel diameter Joule heat Temperature rising rate Inclusion escape ratio

Procedure Design to Fulfill Quality Management System

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厦门大学学报（自然科学版） 2002年第S1期41卷 277-278页

作者： LIU Shu-qing (xi’an University of Technology, xi’an 710048, China)

With the application of the principle of PDCA, and dr awing on the experience of the process methods of the ISO9000 and the system met hods of management, the author analyses the basic requirement to fulfill quality management system in enterprises. Then the author inquires into the procedure t o establish the efficiency quality management system. Finally four stages (plan, do, check, action) and eight steps (decision, plan, analyze, design, do, check, improve, fulfill) are put forward to fulfill quality management system.

关键词： quality management system process methods fulfi ll procedure improve instantly

Optical Torque Exerted on a Rotator under Illumination of a Vortex Beam

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Chinese Physics Letters 2012年第6期29卷 145-148页

作者： LI Dong-Hua PU Ji-xiong WANG xi-qing College of Information Science&Engineering Huaqiao UniversityXiamen 361021 College of Physical Science and Technology Southwest Jiaotong UniversityChengdu 610031

We investigate the torque on a specially shaped rotator produced by a vortex *** formulas for the torque along x,y and z directions axe derived,and numerical calculation is *** is found that for the specially shaped rotator,the torque brought by the Laguerre-Gauss (LG) vortex beam is dependent upon the angle of the facet for each part of the rotator,and the topological charge of the vortex *** is shown that torque is generated from both the light momentum and orbital angular momentum (OAM) of the incident vortex beam,indicating that we can control the rotation of the rotator by modulating the OAM of the incident light beam.

关键词： vortex momentum shaped