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Molecular Characteristics of New Wheat Starch and Its Digestion Behaviours

Journal of Integrative Agriculture 2014年第5期13卷 1146-1153页

作者： ZHOU Zhong-kai HUA ze-tian yanG yan ZHENG Pai-yun ZHANG yan chen Xiao-shan Key Laboratory of Food Nutrition and Safety Ministry of Education/Tianjin University of Science and Technology China National Japonica Rice R&D Center

In order to understand the effect of starch molecular characteristics on the gel structure, which subsequently influence the gel digestion behaviours, three wheat starches, control （conventional wheat starch）, two new wheat cultivars with different genetic backgrounds （by knocking out SBE IIb and SBE IIa, respectively） were used in this study. In comparison with control, slight differences in the morphology of the starch granules of new wheat 1 were observed, whereas the starch granules of new wheat 2 had irregular shapes both for A-type granules and B-type granules. Starch molecular weight size was determined by SE-HPLC, and the results indicate that there was a subtle increase in the amylose content in the starch of new wheat 1 compared to that of control. The starch of new wheat 2 had the highest amylose content, and the molecular weight （MW） of its amylopectin was the lowest among the three starches. Fourier transform infrared spectroscopy （FTIR） was employed to investigate starch gel structure and the results suggest that the molecules of starch gel from new wheat 2 are more likely to re-associate to form an organized conformation. The digestion behaviours of the three starch gels were measured using a mixture of pancreatin a-amylase and amyloglucosidase. The results indicated that the starch gels of control and new wheat 1 had very high digestibility of 91.7 and 91.9%, respectively, whereas the digestibility of wheat 2 starch gel was only 36.2%. In comparison with the digestion curve pattems of control and new wheat 1 starch gels, the new wheat 2 exhibited a much lower initial velocity. These results indicated that the molecules in the starch of new wheat 2 are more readily to re-associate to form an organized structure during gel formation because of its unique molecular characteristics.

关键词： wheat starch starch gels molecular characteristics digestion

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An autonomous dynamic recovery technology for autonomous underwater vehicles based on unmanned surface vehicles

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Science China Technological Sciences 2025年

作者： Yueying WANG Yiqi SHI Guanghui WEN Huaicheng yan School of Mechatronic Engineering and Automation Shanghai University Department of Systems Science School of Mathematics Southeast University School of Information Science and Engineering East China University of Science and Technology

Autonomous underwater vehicles (AUVs) have attracted considerable attention due to their vast potential applications, such as offshore oil exploration, underwater rescue, military reconnaissance, and marine scientific...

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Manufacture the conducting polymer with light

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Science China Chemistry 2025年第01期 8-9页

作者： yang Li Tianyu Li yan Ji Baoguang Liu College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology) Nanjing University of Posts & Telecommunications

Poly(3,4-ethylenedioxythiophene) (PEDOT), heralded as the “king” of conducting polymers, is esteemed in bioelectronics for its mixed electronic and ionic conductivity, mechanical properties compatible with biological tissues, tunable healing ability and stability in diverse environments [1]. Based on additive manufacturing of three-dimensional structures,PEDOT realizes the implementation in the efficient production of flexible bioelectronics, the construction of intricate electrode-neural implantations, and the development of smart brain-computer-interfaces [2].

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AFP、PIVKA-Ⅱ联合检测对原发性肝癌的诊断价值

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海南医学 2020年第10期31卷 1232-1234页

作者：陈泽衍陈晓静郑文斌兰希郭伟权黄汉莲马雯南方医科大学深圳医院检验科广东深圳518110 深圳大学总医院检验科广东深圳518055

目的探讨血清甲胎蛋白(AFP)、异常凝血酶原(PIVKA-Ⅱ)联合检测对原发性肝癌的诊断价值,为患者的临床诊治提供指导。方法选择2019年5~11月在南方医科大学深圳医院就诊的56例原发性肝癌患者作为观察组,选择我院同期体检健康人群50例作为... 详细信息

目的探讨血清甲胎蛋白(AFP)、异常凝血酶原(PIVKA-Ⅱ)联合检测对原发性肝癌的诊断价值,为患者的临床诊治提供指导。方法选择2019年5~11月在南方医科大学深圳医院就诊的56例原发性肝癌患者作为观察组,选择我院同期体检健康人群50例作为对照组。检测并比较两组受检者的血清AFP、PIVKA-Ⅱ水平,采用受试者工作特征(ROC)曲线分析AFP、PIVKA-Ⅱ对原发性肝癌诊断的敏感度、特异度及准确度。结果观察组患者的血清AFP、PIVKA-Ⅱ水平分别为(132.63±17.24) ng/mL、(1 562.56±129.32) mAU/mL,明显高于对照组的(2.35±0.78) ng/mL、(20.08±2.13) mAU/mL,差异均有显著统计学意义(P<0.01);AFP诊断原发性肝癌的ROC曲线下面积为0.805,95%CI为0.723~0.888,PIVKA-Ⅱ诊断原发性肝癌的ROC曲线下面积为0.678,95%CI为0.577~0.779,AFP+PIVKA-Ⅱ诊断原发性肝癌的ROC曲线下面积为0.914,95%CI为0.890~0.939,AFP、PIVKA-Ⅱ单独检测分别和联合检测曲线下面积比较差异均有统计学意义(P<0.05);AFP+PIVKA-Ⅱ联合检测的敏感度、特异度及准确度为96.43%、92.86%及94.64%,均明显高于AFP的82.14%、76.79%、79.62%和PIVKA-Ⅱ的82.14%、75.00%、77.68%,差异均有统计学意义(P<0.05)。结论 AFP、PIVKA-Ⅱ对原发性肝癌均具有较高的诊断阳性率,且两者联合检测可提高原发性肝癌的诊断价值。

关键词：原发性肝癌异常凝血酶原甲胎蛋白诊断价值敏感度特异度

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Study of Two-Mode Squeezed Magnetopolarons

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Communications in Theoretical Physics 2007年第4期47卷 747-751页

作者： ZHANG yan-Min chenG ze Department of Physics Huazhong University of Science and Technology Wuhan 430074 China

In this paper, we conduct an investigation into two-dimensional squeezed magnetopolarons. The Hamiltonian of magnetopolarons is dealt with two-mode squeezed states transformation, which is based on the Lee-Low-Pines and Huybrechts （LLP-H） canonical transformations. This method makes it possible to take account of the linear terms, bilinear ones of phonon operators, and the correlation between two longitudinal optical （LO） phonon modes. The energies of the ground state and excited states are evaluated by variational approach, and accurate results are obtained. Furthermore, the renormalized cyclotron masses for some possible transitions are discussed in detail.

关键词： magnetopolarons squeezed state electron-phonon interaction renormalized mass

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福建省发展低碳农业的必然性与思路

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台湾农业探索 2011年第5期 31-35页

作者：骆旭添李忠陈军吴则焰陈婷林文雄福建农林大学农业生态研究所福建福州350002

随着全球气候变暖的加剧,发展低碳经济已成为共识,低碳农业的发展也成为研究的热点,该文首先分析了低碳农业的内涵,并结合未来农业的发展方向,阐明福建省发展低碳农业的必然性,最后从不同方向提出了具体的发展思路。

关键词：福建低碳农业发展思路

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High-order exceptional points in non-Hermitian Moire lattices

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Frontiers of physics 2019年第5期14卷 81-87页

作者： yan-Rong Zhang ze-Zheng Zhang Jia-Qi Yuan Ming Kang Jing chen MOE Key Laboratory of Weak-Light Nonlinear Photonics School of PhysicsNankai UniversityTianjin 300071China College of Physics and Materials Science Ticmjin Normal UniversityTianjin 300387China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

This study proposes an approach to generate high-order exceptional points (EPs) in non-Herniitian systems.A system comprising a homogenous waveguide is considered wlierein the imaginary part of the refractive index is modulated using a one-dimensional Moire *** gain-loss niodulation couples different lossless waveguide modes,and these hybrid modes can be modeled using a non-Hcnnitian matrix with complex off-diagonal *** indicate that third-order EPs can be produced by the coalescence of two sccond-ordcr ***,the necessary rcquiiGmcnts arc analyzed using couplcd-wavc ccjuations and the physical effects of the singularities are discussed.

关键词： exceptional points non-Hermitian quantum physics quantum optics phase transitions

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Research progress of TiFe-based hydrogen storage alloys

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Journal of Iron and Steel Research International 2022年第4期29卷 537-551页

作者： yang-huan Zhang chen Li ze-ming Yuan yan Qi Shi-hai Guo Dong-liang Zhao Department of Functional Material Research Central Iron and Steel Research Institute GroupBeijing 100081China Key Laboratory of Integrated Exploitation of Baiyun Obo Multi-Metal Resources Inner Mongolia University of Science and TechnologyBaotou 014010Inner MongoliaChina

After being activated,TiFe alloys are widely concerned for their high hydrogen storage density due to their large reversible absorption and desorption capacity of hydrogen at room temperature,low price,abundant resources,moderate hydride decomposition pressure,and good hydrogen absorption and desorption kinetic ***,TiFe alloys can be used as anode materials for secondary batteries,catalysts for hydrogenation,and storage media for thermal,solar,and wind energy,which has wide industrial application ***,TiFe alloys have disadvantages such as difficult activation,easy toxicity,and large *** review introduces the current research status and performance characteristics of TiFe-based hydrogen storage alloys,the phase structure,hydride phase structure,kinetic and thermodynamic models of TiFe alloys,as well as the application prospects of TiFe-based hydrogen storage alloys in practical production and the ways to improve their hydrogen storage performance,and presents the views on the future research priorities and development directions of TiFe-based hydrogen storage alloys.

关键词： Hydrogen storage TiFe alloy Metal hydride Phase structure Performance characterization Modified treatment

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Genome-wide microarray-based analysis of miRNAs expression in patients with acute-onchronic liver failure

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Hepatobiliary & Pancreatic Diseases International 2014年第1期13卷 32-39页

作者： Wen chen ze-Hui yan Yu-Ming Wang Bao-yan Xu Guo-Hong Deng Institute of Infectious Diseases Southwest Hospital Third Military Medical University Chongqing Key Laboratory for Research of Infectious Diseases

BACKGROUND: Acute-on-chronic liver failure(ACLF) is a severe clinical syndrome that may cause a high mortality. However, the mechanism is still not clear. Characterization of the microRNA(miRNA) profiles in ACLF patients may provide new clues to the pathogenesis and management of this syndrome. METHODS: Genome-wide microarray was performed to compare the different miRNA expression profiles in peripheral blood mononuclear cells of a pair of monozygotic twins, an ACLF patient and an HBV asymptomatic carrier(AsC). The case-control miRNA profiles were compared and confirmed by quantitative reverse transcription-polymerase chain reaction in 104 ACLF patients and 96 AsCs. A combined computational prediction algorithm was used to predict the potential target genes. RESULTS: Forty-five miRNAs were increased and eight miRNAs were decreased in the ACLF group. The expressions of hsa-let-7a and hsa-miR-16 were increased by 8.58- and 8.63-fold in ACLF patients compared with that in AsCs, respectively(P<0.001). CARD8, BCL2, IL1RAPL1, LTB, FZD10 and EDA were identified as the target genes of hsa-miR-16; MAP4K3, OPRM1, IGF2BP1 and CERCAM were verified as the target genes of hsa-let-7a. CONCLUSIONS: Our results showed that there is a close relationship between specific miRNAs of peripheral blood mononuclear cells and ACLF. hsa-miR-16 and hsa-let-7a may contribute to the development of ACLF.

关键词： acute-on-chronic liver failure microRNA microarray twins

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Bending Stiffness of Concrete-Filled Steel Tube and Its Influence on Concrete Placement Timing of Composite Beam-String Structure

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Structural Durability & Health Monitoring 2025年第1期19卷 55-75页

作者： Zhenyu Zhang Quan Jin Haitao Zhang Zhao Liu Yuyang Wu Longfei Zhang Renzhang yan CCCC Third Highway Engineering Co. Ltd.Beijing101300China School of Civil Engineering Chongqing Jiaotong UniversityChongqing400074China

When the upper chord beam of the beam-string structure(BSS)is made of concrete-filled steel tube(CFST),its overall stiffness will change greatly with the construction of concrete placement,which will have an impact on the design of the tensioning plans and selection of control measures for the *** order to accurately obtain the bending stiffness of CFST beam and clarify its impact on the mechanical properties of composite BSS during construction,the influence of some factors such as height-width ratio,wall thickness of steel tube,elasticity modulus of concrete,and friction coefficient on the bending stiffness are analyzed parametrically by the numerical simulation technology based on an actual *** calculation formula of the equivalent bending stiffness of CFST is also established through mathematical statistical ***,the equivalent bending stiffness is introduced into the construction and use stages of the composite BSS,respectively,and the mechanical properties such as prestress-tensioning control value,structural deformation,and internal force of key members are comparatively analyzed when adopting two different construction ***,the optimal construction plan of concrete placement first and then prestress-tensioning is proposed.

关键词： Concrete panels freeze-thaw damage compression-shear crack tension-shear crack

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