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Nd9(Fe,In)_(85)B_6纳米复相永磁材料的结构与磁性能研究

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稀有金属材料与工程 2005年第2期34卷 303-305页

作者：张栋杰都有为南京师范大学江苏南京210097 南京大学江苏南京210093

用熔体快淬法制备了纳米复相结构 Nd9Fe85- B6Inx 永磁体,利用 XRD 和 VSM 等方法研究了 In 掺杂和热处理温度对其磁性能的影响。结果表明,在磁体 Nd9Fe85- B6Inx 中 In 掺杂可以提高其矫顽力和剩磁比,可改善磁体磁滞回线矩形度;有助于... 详细信息

用熔体快淬法制备了纳米复相结构 Nd9Fe85- B6Inx 永磁体,利用 XRD 和 VSM 等方法研究了 In 掺杂和热处理温度对其磁性能的影响。结果表明,在磁体 Nd9Fe85- B6Inx 中 In 掺杂可以提高其矫顽力和剩磁比,可改善磁体磁滞回线矩形度;有助于改善磁体 Nd9Fe85- B6Inx的热处理性能。在 Nd9Fe85- B6Inx 中,不掺杂 In 和掺杂 In 为 0.5 mol%时,具有最佳的矫顽力和磁能积,其值分别为 465 kA/m 和 145 kJ/m3。

关键词： Nd-Fe-B 纳米复相结构矫顽力

酸面团中酵母菌的筛选及其在全麦馒头制作中的应用

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黑龙江八一农垦大学学报 2024年第3期36卷 65-71,79页

作者：姜秀杰曹禛禛吴睿喆邵海益马鑫悦魏春红迟晓星张东杰黑龙江八一农垦大学食品学院大庆163319 黑龙江八一农垦大学国家杂粮工程技术研究中心黑龙江省农产品加工与质量安全重点实验室

为充分挖掘酸面团中优良酵母菌菌种,缓解酸面团因微生物复杂而导致馒头品质不一的问题。以自然发酵的酸面团为研究对象,对酸面团中的酵母菌进行初步筛选及发酵特性研究,并将获取的优良酵母菌应用于全麦馒头的制作。结果发现酸面团中有5... 详细信息

为充分挖掘酸面团中优良酵母菌菌种,缓解酸面团因微生物复杂而导致馒头品质不一的问题。以自然发酵的酸面团为研究对象,对酸面团中的酵母菌进行初步筛选及发酵特性研究,并将获取的优良酵母菌应用于全麦馒头的制作。结果发现酸面团中有5株(S1、S2、S3、S4、S5)酵母菌菌株,选出特征明显的S1、S2、S5株菌株进行酵母菌产酒精、繁殖能力及发酵能力研究,分析发现S2和S5产酒精能力最强、S1和S5繁殖能力最强、S2和S5发酵能力最强。通过对3株酵母菌的形态特征及发酵特性的综合评价,确定S5为酸面团中的优势酵母菌。将筛选的优势菌S5与安琪酵母分别添加到全麦面团中,并对2种馒头的外表性质进行测定与感官评定,确定S5发酵的全麦馒头的口感和风味优于安琪酵母全麦馒头。由此可知,S5优势酵母菌对全麦馒头风味物质的积累有显著作用,以期为全麦馒头的品质改良提供有价值的菌种资源和技术参考。

关键词：酸面团酵母菌筛选发酵特性全麦馒头

Clone and Bioinformatics Analysis of Pig SRPK1 Gene 5' UTR Region

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Journal of Northeast Agricultural University(English Edition) 2011年第3期18卷 22-27页

作者： E Guangxin LIU Di YANG Xiuqin zhang dongjie YU Cui College of Animal Science and Technology Northeast Agricultural University Harbin 150030 China Hellongliang Academy of Agricultural Sciences Harbin 150086 China Agricultural College Hainan University Haikou 570228 China

Part 5＇ UTR region of pig SRPK1 gene was cloned by inverse PCR （I-PCR）, then a 425 bp gene sequence was acquired. A promoter region in -1--309 bp was predicted by online tool （TFSEARCH） and 32 binding sites of transcription with scores higher than 85 were getten, of which scores of Spl, MyoD, and HSF2 were over 90. Some of these binding sites of transcription factors were connected with promoters, but TATA-box, which was important to gene expression, hadn＇t been found in this region. By using PCR-SSCP method to search SNPs this part （5＇ UTR of SRPK1 in pig）, total of 40 Large White pigs were obtained as the research objects, but no polymorphism were found. Thus, 5＇ UTR of SRPK1 was speculated with a characteristic of high conservation, while it might have been directly or indirectly selected in commercial breeding. The paper provided a further feature of SRPK1 gene in molecular genetics.

关键词： pig SRPK1 bioinformatics transcription factor SSCP inverse PCR (I-PCR)

“Liquid diode”with“gating”based on shape memory sponge

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Science China Materials 2022年第9期65卷 2591-2599页

作者： Yingbin Song Hua Lai Xiaoyu Jiao Pengchang Liu Dongdong Hu Hongjun Kang dongjie zhang Zhimin Fan Zhimin Xie Yuyan Liu Lei Jiang Zhongjun Cheng State Key Laboratory of Urban Water Resource&Environment School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China Shanghai Institute of Space Power-sources/State Key Laboratory of Space Power-sources Technology Shanghai 201100China Institute of the Sixth Research Institute of China Aerospace Science and Industry Corporation Hohhot 010000China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150080China CAS Key Laboratory of Bio-Inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China

Superwetting Janus membranes with unique ability in unidirectional liquid transportation,known as“liquid diode”,have attracted much ***,endowing the Janus membranes with smart controllability becomes a new research ***,related reports are still rare and limited in regulating surface wettability,which can hardly avoid some imperfections such as the necessary constant external stimuli and change of water ***,we advanced an unprecedented strategy to smartly control the liquid permeation on Janus membrane by regulating the pore structure of the material,and report a smart Janus sponge(SJS)that is constructed from a super-hydrophilic sponge(SHS)and a hydrophobic shape memory sponge(HSMS).The pore size and thickness of the HSMS can be reversibly changed as it is pressed/recovered based on the excellent shape memory *** the variation of the HSMS,the water permeation performance can be smartly controlled,which is embodied in that only when the HSMS is in the pressed state,SJS acts as a“liquid diode”,otherwise it can prevent liquid from penetrating on either ***,based on the smart controllability of the SJS,we simulated the scene of drug administration and demonstrated its potential application in the field of wound *** work firstly reports a shape memory Janus membrane and provides a new way to control the liquid permeation,which can successfully avoid those shortcomings existing in current wetting-responsive Janus *** its excellent controllability,we believe it has potential applications in intelligent manipulation of liquid.

关键词： Janus membrane shape memory sponge superwetting smart controllability

食源性生物活性肽对2型糖尿病的干预作用及其机制研究进展

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食品科学 2023年第3期44卷 278-287页

作者：张舒王长远张东杰黑龙江八一农垦大学食品学院黑龙江大庆163319 国家杂粮工程技术研究中心黑龙江大庆163319 黑龙江省农产品加工与质量安全重点实验室黑龙江大庆163319

2型糖尿病属于非胰岛素依赖性糖尿病,全世界每年有数百万人患2型糖尿病或成为潜在患者。食源性活性肽不仅具有基本的营养优势,而且更易被机体吸收,有研究证实生物活性肽可以抑制与2型糖尿病相关的代谢酶活力,促进肠促胰岛素分泌,改善胰... 详细信息

2型糖尿病属于非胰岛素依赖性糖尿病,全世界每年有数百万人患2型糖尿病或成为潜在患者。食源性活性肽不仅具有基本的营养优势,而且更易被机体吸收,有研究证实生物活性肽可以抑制与2型糖尿病相关的代谢酶活力,促进肠促胰岛素分泌,改善胰岛素抵抗,因此可以作为有效管理该疾病的功能性食品或药物。本文综述了食源性生物活性肽的特性和来源,以及目前其关于调节血糖作用机制的研究进展,归纳了食源性代谢酶调节剂的相关研究,以期为食源性生物活性肽的进一步研究提供参考。

关键词：功能食品食物源生物活性肽 2型糖尿病血糖调控干预机制

Featureless Zone in Rapidly Solidified Aluminum Alloy Splats

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Journal of Materials Science & Technology 1993年第6期9卷 464-466页

作者： Ningfu SHEN Yali TANG dongjie zhang Longqing CHEN Shaokang GUAN Research Centre for Materials,Zhengzhou Institute of Technology,Zhengzhou,450002,China

The microstructures of rapidly solidified (RS) Al-Fe-Ce-Ti and Al-Fe-V-Si alloys obtained by means of rotating blade quenching were studied with optical microscopy,transmission electron microscopy (TEM).The featureless zone observed in the two alloys reveals that the new technique offers a higher solidification rate than the inert-gas-atomized *** TEM observation the featureless zone presents virtually a micropartition or partitionless feature,and the solute contents in it are almost the same as the chemical composition of alloys.

关键词： rapid solidification rotating blade quenching aluminum alloy featureless zone

Extraction of acetanilides in rice using ionic liquid-based matrix solid phase dispersion-solvent flotation

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Extraction of acetanilides in rice using ionic liquid-based ...

中国化学会第十三届全国分析化学年会

作者： Liyuan zhang Changyuan Wang Zuotong Li Changjiang Zhao Hanqi zhang dongjie zhang College of Food Heilongjiang Bayi Agricultural University College of Chemistry Jilin University

Ionic liquid-based matrix solid phase dispersion-solvent flotation coupled with high performance liquid chromatography was developed for the determination of the acetanilide herbicides, including metazachlor, propanil, alachlor, propisochlor, pretilachlor, and butachlor in rice samples. Some experimental parameters, including the type of dispersant, the mass ratio of dispersant to sample, pH of sample solution, the type of extraction solvent, the type of ionic liquid, flotation time, and flow rate of N2 were optimized. The average recoveries of the acetanilide herbicides at spiked concentrations of 50, 125, and 250 μg/kg ranged from 89.4 % to 108.7 %, and relative standard deviations were equal to or lower than 7.1%, The limits of quantification were in the range of 38.0 to 84.7 μg/kg.

关键词： acetanilide herbicides ionic liquids solvent flotation matrix solid phase dispersion rice

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求解物流中心选址问题的猴群算法

系统仿真学报 2018年第6期30卷 2272-2278页

作者：徐小平张东洁西安理工大学理学院陕西西安710054

物流中心选址问题是影响物流中心整体建设发展的最基础问题,加强物流中心选址问题研究具有十分重要的意义。然而,它是一个被人们广泛关注的NP问题。因此,本文利用一种改进的猴群算法来求解物流中心选址问题。给出一种改进方法,其基本思... 详细信息

物流中心选址问题是影响物流中心整体建设发展的最基础问题,加强物流中心选址问题研究具有十分重要的意义。然而,它是一个被人们广泛关注的NP问题。因此,本文利用一种改进的猴群算法来求解物流中心选址问题。给出一种改进方法,其基本思想为采用混沌变量产生猴群算法的初始可行解,在爬过程中采用递减的因子作为爬步长以及在望过程中引用混沌搜索法来提高算法性能。利用改进算法求解物流中心选址问题。在仿真实验中,分别利用对典型函数和物流中心选址问题的求解结果说明了所提方法是可行的。

关键词：物流中心选址猴群算法混沌变量递减的因子混沌搜索法

Evaluation for Bone Regeneration Mierospheres

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Journal of Wuhan University of Technology(Materials Science) 2014年第2期29卷 391-397页

作者： XU Fei YIN Miao DING Huifen SONG Fangfang FU dongjie zhang Jiayin WANG Jiawei Hubei-MOST KLOS & KLOBM School and Hospital of Stomatology Wuhan University Wuhan 430079 China

The apatite-coated chitosan microspheres were fabricated by incubating chitosan in five times simulated body fluid. The apatite deposited on the microspheres was similar to natural bone mineral, as demonstrated by scanning electron microscopy, X-ray diffraction spectra and Fourier transformed-infrared spectroscopy analyses. Rat bone marrow-derived mesenchymal stem cells （BMSCs） were seeded on apatite- coated microspheres to investigate the effect of this scaffold on cell proliferation and differentiation. BMSCs seeded on uncoated microspheres were served as a control. In vivo experiment was evaluated by transplanting the microspheres loaded with or without BMSCs in 5-mm cranial defects of Wistar rats. Bone regeneration was investigated via micro-CT and histological analysis. It was found that apatite-coated chitosan microspheres could significantly promote the proliferation and alkaline phosphatase activity of BMSCs compared with uncoated microspheres. Histological slices and Micro-CT images at 8 weeks revealed much better regeneration of bone in the apatite-coated microspheres loaded with BMSCs than the control. In addition, the defect filled with pure microspheres induced little new bone formation. Our findings suggest that the apatite-coated chitosan microspheres scaffold is a promising carrier of stem cells for cranial bone tissue engineering.

关键词： chitosan microsphercs apatite bone regeneration