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Journal of materials Science & Technology 2022年第19期114卷 206-214页

作者： Zhen Yu Rui Zhou Mingwei ma Runqiu Zhu Peng Miao Pei Liu jie kong MOE Key Laboratory of materials Physics and Chemistry in Extraordinary Conditions Shaanxi Key Laboratory of Macromolecular Science and TechnologySchool of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072China

In this work,zeolitic imidazolate framework-8(ZIF-8)with yolk-shell and hollow structures were pre-pared by a convenient chemical etching method.A subsequent pyrolysis of ZIF-8 enabled one to pro-duce ZnO/nitrogen-doped carbon nanocomplexes with original ZIF-8 morphology,where hollow struc-ture showed superior electromagnetic wave absorption capacity and was responsible for matching the impedance of free *** minimum reflection coefficients of hollow ZnO/nitrogen-doped carbon nanocomplexes were-51.2 dB(700℃)and-52.4 dB(800℃),respectively,whereas the effective ab-sorption band width was as large as 4 GHz and the content of pyrolyzed hollow ZIF-8 was 15 wt%,which was inferior to the level among similar electromagnetic wave(EMW)absorption *** conve-nient and facile strategy paves the way toward designing hierarchical structures for highly efficient and light-weight electromagnetic wave absorbers.

关键词： Zeolitic imidazolate framework Electromagnetic wave absorption Yolk-shell structure Hollow structure Lightweight materials

解冻方式对新疆干辣椒炒牛肉预制菜品质的影响

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核农学报 2025年第1期39卷 96-106页

作者：顾雪敏陈昆马慧王洪旭梅洁王梓棚李文凤孔令明新疆农业大学食品科学与药学学院新疆乌鲁木齐830000 新疆西尔丹食品有限公司新疆乌鲁木齐830000

为探究解冻方式对新疆干辣椒炒牛肉预制菜品质的影响,本研究选取自然解冻、流水解冻、超声波解冻、微波解冻和低温解冻作为解冻方式,分析5种解冻方式对新疆干辣椒炒牛肉预制菜pH值、色泽、质构特性、挥发性盐基氮(TVB-N值)、硫代巴比妥... 详细信息

为探究解冻方式对新疆干辣椒炒牛肉预制菜品质的影响,本研究选取自然解冻、流水解冻、超声波解冻、微波解冻和低温解冻作为解冻方式,分析5种解冻方式对新疆干辣椒炒牛肉预制菜pH值、色泽、质构特性、挥发性盐基氮(TVB-N值)、硫代巴比妥酸值(TBARS值)和挥发性风味物质品质指标的影响。结果表明,与空白对照组相比,低温解冻在维持新疆干辣椒炒牛肉预制菜pH值(5.19)和色泽方面表现最佳,超声波解冻的质构特性最好且TVB-N值最低(7.35 mg·100 g^(-1)),微波解冻的TBARS值最低(0.36 mg·kg^(-1)),微波解冻和低温解冻后新疆干辣椒炒牛肉预制菜的感官评分较好,流水解冻各项指标处于中间位置。D-柠檬烯、苯甲醛、苯乙醛、壬醛、芳樟醇、苯乙醇、α-松油醇、3-甲基-苯酚、萘、茴香脑、草蒿脑等挥发性风味物质对新疆干辣椒炒牛肉预制菜总体风味的形成有重要贡献,低温解冻后的挥发性风味物质最接近空白对照组。本研究可为新疆干辣椒炒牛肉预制菜的解冻工艺提供支撑。

关键词：解冻方式预制菜品质挥发性风味物质气相色谱-质谱法(GC-MS)

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Phase-Selective Gelators Based on p-Alkoxybenzoyl for Oil Spill Recovery and Dye Removal

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Transactions of Tianjin University 2019年第6期25卷 586-594页

作者： Hongmei Qu jie Zhang Yunxia ma Zhongxuan Li Jianjun qiao Key Laboratory of Systems Bioengineering (Ministry of Education) Department of Pharmaceutical Engineering School of Chemical Engineering and Technology Tianjin University

Oil spills result in tremendous damage to the environment and *** this study,several p-alkoxybenzoyl-based gelators(1,2a,2b,2c,3)synthesized from commercially available materials were designed for recovering oil from an oil–water *** with remarkable gelation ability in various oils were characterized by nuclear magnetic resonance,Fourier transform infrared spectroscopy and X-ray diffraction to study the driving forces of ***,these gelators could achieve the goal of recycling oil from the oil–water mixture at room *** addition,gelator 2b could be used to remove toxic dyes from aqueous solutions with high ***,these compounds were considered promising materials for oil spill recovery and dye removal due to their practicality and high efficiency.

关键词： Organogelator p-Alkoxybenzoyl Phase selectivity Oil spills recovery Dye removal

A new steroidal alkaloid from Beaumontia grandiflora

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Chinese Chemical Letters 2009年第9期20卷 1094-1096页

作者： Li ma Jian Guang Luo Yu Cheng Gu ling Yi kong Department of Natural Medicinal Chemistry China Pharmaceutical University 24 Tong Jia Xiang Nanjing 210009 People's Republic of China Syngenta Jealott's Hill International Research Centre Bracknell Berkshire RG42 6EY United Kingdom

A new steroidal alkaloid, beaumontamine （1）, was isolated from the stems of Beaumontia grandiflora. The structure was elucidated on the basis of spectral analysis. 2009 L.Y. kong. Published by Elsevier B.V. on beh... 详细信息

关键词： Beaumontia grandiflora Beaurnontamine Alkaloid

Effect of Waxy Wheat Flour Blends on the Quality of Fresh and Stale Bread

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Agricultural Sciences in China 2009年第4期8卷 401-409页

作者： QIN Peng ma Chuan-Xi WU Rong-lin kong Zhi-you ZHANG Bo-qiao College of Agronomy and Biotechnology Yunnan Agricultural University Kunming 650201 P.R.China Agricultural Research Institute of Lixiahe Region Yangzhou 225007 P.R. China College of Agronomy Anhui Agricultural University Hefei 230036 P.R. China Department of Biology and Chemistry Baoshan Teachers College Baoshan 678000 P.R.China

Starch is the major component in the wheat kernel, which is mainly composed of amylose and amylopectin. The wheat without amylose in its endosperm was called ＂waxy wheat＂. Waxy wheat can be used to adjust the amylose content and improve the wheat-based food quality by adding to non-waxy wheat flour. In order to investigate the effect of waxy wheat flour on the quality of fresh and stale bread, waxy wheat flour was added into the flour of Canadian Spring Wheat 2 at 0.0, 5.0, 10.0, 15.0, 20.0, 25.0, 30.0, and 35.0% to make breads. The physicochemical properties were adjusted to suitability by adding Yangmai 158 flour, and breads were evaluated for sensory quality, crumb firmness, loaf volume and weight loss over a period of 0, 2, 4, and 6 days. The result showed that the best total score of fresh bread was 82.9 by adding waxy flour at 7.0%, though no significant difference was found among blends with 0.0-15.0% of waxy flour. Breads with the addition of 22.0% waxy flour had lower firmness, and decreasing loss of weight. Waxy wheat flour blend at 15.0% was optimal in retarding staling without significant decreasing fresh bread quality in comparison to the control.

关键词： waxy wheat fresh bread stale bread quality

FAAD:an unsupervised fast and accurate anomaly detection method for a multi-dimensional sequence over data stream

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Frontiers of Information Technology & Electronic Engineering 2019年第3期20卷 388-404页

作者： Bin LI Yi-jie WANG Dong-sheng YANG Yong-mou LI Xing-kong ma Science and Technology on Parallel and Distributed Processing Laboratory College of ComputerNational University of Defense Technology Block Chain Research Institute of LianLian Pay

Recently, sequence anomaly detection has been widely used in many fields. Sequence data in these fields are usually multi-dimensional over the data stream. It is a challenge to design an anomaly detection method for a multi-dimensional sequence over the data stream to satisfy the requirements of accuracy and high speed. It is because:(1) Redundant dimensions in sequence data and large state space lead to a poor ability for sequence modeling;(2) Anomaly detection cannot adapt to the high-speed nature of the data stream, especially when concept drift occurs, and it will reduce the detection rate. On one hand, most existing methods of sequence anomaly detection focus on the single-dimension sequence. On the other hand, some studies concerning multi-dimensional sequence concentrate mainly on the static database rather than the data stream. To improve the performance of anomaly detection for a multi-dimensional sequence over the data stream, we propose a novel unsupervised fast and accurate anomaly detection(FAAD) method which includes three algorithms. First, a method called "information calculation and minimum spanning tree cluster" is adopted to reduce redundant dimensions. Second, to speed up model construction and ensure the detection rate for the sequence over the data stream, we propose a method called"random sampling and subsequence partitioning based on the index probabilistic suffix tree." Last, the method called "anomaly buffer based on model dynamic adjustment" dramatically reduces the effects of concept drift in the data stream. FAAD is implemented on the streaming platform Storm to detect multi-dimensional log audit *** with the existing anomaly detection methods, FAAD has a good performance in detection rate and speed without being affected by concept drift.

关键词： Data stream Multi-dimensional sequence Anomaly detection Concept drift Feature selection

Elemene Emulsion Injection Administration Reduces Neuropathic Pain by Inhibiting Astrocytic NDRG2 Expression within Spinal Dorsal Horn

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Chinese Journal of Integrative Medicine 2021年第12期27卷 912-918页

作者： ma Li-tian BAI Yang LI jie qiao Yu LIU Yang ZHENG Jin Department of Traditional Chinese Medicine Tangdu Hospitalthe Fourth Military Medical UniversityXi'an(710038)China Department of Gastroenterology Tangdu HospitalAir Force Medical UniversityXi'an(710032)China Department of Anatomy Histology and Embryology&K.K.Leung Brain Research Centrethe Fourth Military Medical UniversityXi'an(710032)China Department of Neurosurgery General Hospital of Northern Theater Command(General Hospital of Shenyang Military Command)Shenyang(110016)China Department of Endocrinology Xijing Hospitalthe Fourth Military Medical UniversityXi'an(710038)China Laser Medical Center Hainan HospitalPeople's Liberation Army General HospitalSanya(572013)Hainan ProvinceChina Health Center of 31658 of the People's Liberation Army Xining(810000)China

Objective To investigate the mechanisms underlying elemene-induced analgesia in rats with spared nerve injury(SNI).Methods Sixty-five rats were equally divided into 5 groups using a random number table:naive group,sham group,SNI group,SNI+elemene(40 mg·kg−1·d−1)group and naive+elemene(40 mg·kg−1·d−1)*** SNI rat model was established and the intervention were given respectively for 14 consecutive *** Frey filament tests and elevated plus-maze(EPM)tests were used to evaluate the effect of elemene on the mechanical threshold and anxiety,*** and immunostaining were used to measure the expression of glial fibrillary acidic protein(GFAP)and NMYC downstream-regulated gene 2(NDRG2)within the lumbar spinal dorsal horn(SDH).Results The SNI rat model exhibited a significant decrease in paw withdrawal threshold and exploratory behaviour in the EPM(P<0.05).Consecutive administration of elemene alleviated SNI-induced mechanical allodynia and anxiety in rats(P<0.05).Immunohistochemical data showed that elemene decreased SNI-induced upregulation of NDRG2 within the SDH(P<0.05).Double immunofluorescent staining data further showed that elemene decreased SNI-induced upregulation of the number of GFAP immunoreactive(-ir),NDRG-ir,and GFAP/NDRG2 double-labelled cells within the SDH(P<0.05).Immunoblotting data showed that elemene decreased SNI-induced upregulation of GFAP and NDRG2 within the SDH(P<0.05).Conclusion Elemene possibly alleviated neuropathic pain by downregulating the expression of NDRG2 in spinal astrocytes in a rat model of SNI.

关键词： elemene emulsion injection astrocyte NMYC downstream-regulated gene 2

Inferring future warming in the Arctic from the observed global warming trend and CMIP6 simulations

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Advances in Climate Change Research 2021年第4期12卷 499-507页

作者： HU Xiao-Ming ma jie-Ru YING Jun CAI Ming kong Yun-Qi School of Atmospheric Sciences Sun Yat-sen UniversityZhuhai519082China State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of OceanographyState Oceanic AdministrationHangzhou310012China Southern marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai519082China Key Laboratory for Semi-Arid Climate Change of the Ministry of Education College of Atmospheric SciencesLanzhou UniversityLanzhou730000China Department of Earth Oceanand Atmospheric ScienceFlorida State UniversityTallahassee32306USA

The emergent constraint approach is a way of using multi-model ensembles to identify the linkage between current/past climate variability and future climate changes,which has been widely used for narrowing down the uncertainty of multi-model projections of future climate *** models of the latest Coupled Model Intercomparison Project Phase 6(CMIP6)show a much stronger Arctic wanning signal but with a larger inter-model *** this study,we find that the projected Arctic warming made by multi-models in CMIP6 is positively correlated with the simulated global warming trend during the period of 1981-2011 in historical *** enables us to tighter constraints to future warming in the Arctic by using the observed global warming during the instrument *** fact that CMIP6 models tend to overestimate the trend of global mean surface temperature during 1981-2011,therefore,would imply a relative weak Arctic warming compared to the CMIP6 median warming projection.

关键词： CMIP6 Arctic warming projection Global warming Observational constraint

Improvement of Optical Reactivity for Nano-TiO2 Film by Nitrogen ECR Plasma

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Journal of materials Science & Technology 2006年第3期22卷 353-358页

作者： Yuying XIONG Tao ma ling hong kong Junfang CHEN Xianqiu WU Honghua YU Zhenxi ZHANG School of Life Science and Technology Xi＇an Jiaotong University Xi＇an 710049 China School of Physics and Telecommunications Engineering South China Normal University Guangzhou 510631 China

Nitrogen ion was implanted into the nano-TiO2 film surfaces by electron cyclotron resonance （ECR） plasma modification to improve the optical reactivity in visible-light region for nano-TiO2. Diagnosing the N2 plasma by optical emission spectroscopy （OES） was applied to the process of plasma modification. X-ray photoelectron spectroscopy （XPS） was used for analysis of the binding of element after plasma modification. It is shown that the surface modification was caused by excitated N. The injecting of N2 and N＋ leads to the increase in the dissociative interstitial state N in the films. The doped N makes for TiO2-xNx appearing in the TiO2 films. TiO2-xNx forms the impurity energy state in the TiO2 energy band gap and reduces the energy band gap. This is the main reason leading to the red shift of absorption edge.

关键词： ECR plasma surface treatment Titanium dioxide nitrogen doping Optical emission spectroscopy X-ray photoelectron spectroscopy

Quantum Mechanical Analysis of Sodium Alginate Effects on the Konjac Glucomannan Stability

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Chinese Journal of Structural Chemistry 2015年第8期34卷 1187-1196页

作者： ma Zhen PANG jie LIN Mei-ling XIE Bing-Qing CHEN Han CHEN Jing-ling College of Food Science Fujian Agriculture and Forestry University Department of Physics Jefferson Physical Lab Harvard University Chern Institute of mathematics Nankai University

Konjac glucomannan （KGM） and sodium alginate were chosen as the research objects, and the hydrogen bond conformation of compound system was studied with the molecular dynamics simulation, which simulated the energy variety in composite process. Combining with Hamiltonian in quantum mechanics calculation, the mechanism of hydrogen bond in KGM and sodium alginate compound system stability was analyzed from a micro angle. The results showed that, the hydrogen bonds occurring between the molecule of KGM and sodium alginate are in large number, and they mainly appeared between the -OH on C（6）, C（3） in the mannose residues of KGM and C（2）, C（3） of sodium alginate. The formation of hydrogen bonds results in the energy expectation value of the Hamiltonian thermal density matrix of the compound system to be negative, the energy of the system to decrease, and the compounds tending to form stable conformations.

关键词： Konjac glucomannan sodium alginate composite molecular dynamics quantum