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Chemical Research in Chinese Universities 2019年第1期35卷 33-40页

作者： yang xiufang WANG Xiaogang WANG Tingting WANG Weitao ZHANG Jin MA yangmin College of Chemistry & Chemical Engineering Shaanxi University of Science and Technology Xi 'an 710021.P.R.China Shaanxi Key Laboratory of Chemical Additives for Industry Shaanxi University of Science and Technology Xi'an 710021P.R.China Shaanxi Research Institute of Agricultural Products Processing Technology Shaanxi University of Science and TechnologyXi 'an 710021P.R.China

A simple,efficient and green procedure for the synthesis of spiro-oxindole dihyfroquinazolinones was developed by multi-component condensation of isatoic anhydride,aniline and isatin in the presence of a novel solid acid catalyst under ultrasound *** present environmentally benign protocol offers several advantages, such as shorter reaction time,a wide range of fimctional group tolerance,the use of an inexpensive heterogeneous catalyst,and a high yield of products via a simple experimental and work-up *** mesoporous solid acid catalyst was directly prepared from phytic acid by microwave-sulfonation method without *** phytic acid based solid acid was fully characterized by means of Fourier transform infrared spectroscopy(FTIR),Raman spectroscopy,X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),and transmission electron imcroscopy(TEM).The catalyst can be recovered and reused for at least five runs without significant impact on the product yields.

关键词： Microwave-sulfonation method Solid acid catalyst Spiro-oxindole dihyfroquinazolinone

Ultrahigh Density of Atomic CoFe-Electron Synergy in Noncontinuous Carbon Matrix for Highly Efficient Magnetic Wave Adsorption

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Nano-Micro Letters 2022年第6期14卷 192-205页

作者： Wenhuan Huang Qiang Qiu xiufang yang Shouwei Zuo Jianan Bai Huabin Zhang Ke Pei Renchao Che Key Laboratory of Chemical Additives for China National Light Industry College of Chemistry and Chemical EngineeringShaanxi University of Science and TechnologyXi’an 710021People’s Republic of China KAUST Catalysis Center King Abdullah University of Science and Technology23955-6900 ThuwalKingdom of Saudi Arabia Laboratory of Advanced Materials Shanghai Key Lab of Molecular Catalysis and Innovative MaterialsFudan UniversityShanghai 200438People’s Republic of China

Improving the atom utilization of metals and clarifying the M–M’interaction is both greatly significant in assembling high-performance ultra-light electromagnetic wave-absorbing ***,a high-temperature explosion strategy has been successfully applied to assemble the hierarchical porous carbon sponge with Co–Fe decoration via the pyrolysis of the energetic metal organic *** as-constructed hybrid displays a superior reflection loss(RL)value of-57.7 d B and a specific RL value of-192 d B mg-1 mm-1 at 12.08 GHz with a layer thickness of 2.0 mm(loading of 15 wt%).The off-axis electron hologram characterizes the highly distributed numerous polarized nanodomain variable capacitors,demonstrating the dipole and interfacial polarization along the edges of the *** importantly,the X-ray absorption spectroscopy analysis verifies the mutual interaction between the metal cluster and carbon matrix and the electronic coupling responsible for the greatly improved electromagnetic wave absorption.

关键词： Electromagnetic wave-absorbing materials Off-axis electron hologram M-M’interaction Hierarchical porous structure Energetic metal organic framework

High-quality instant black tea manufactured using fresh tea leaves by two-stage submerged enzymatic processing

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Food Science and Human Wellness 2022年第3期11卷 676-685页

作者： Junhao Kong xiufang yang Xiaobo Zuo Xiaoqin Su Bing Hu Xinle Liang Department of Biochemical Engineering Zhejiang Gongshang UniveristyHangzhou 310018China Hangzhou Tea Research Institute China COOPHangzhou 310016China Zhejiang Key Laboratory of Transboundary Applied Technology for Tea Resource Hangzhou 310016China Haixi Tea Deep Processing Institute Zhangzhou 363007China College of Food Science and Technology Nanjing Agricultural UniversityNanjing 210095China

Repeated thermal treatment could impair the flavor of instant black tea(IBT)as the volatile compounds and characteristic constituents dramatically vary during the manufacturing *** of fresh leaves as raw material in IBT manufacture at low temperature may become an alternative to conventional extraction *** study aimed to improve the quality of IBT using fresh tea leaves by a two-stage enzymatic *** influence of combined enzymatic oxidation and extraction conditions for maximal extractable flavour(taste and aroma)characteristics from fresh tea leaves were *** changes of aroma profiles and chemical constituents including theaflavins(TFs),thearubigins(TRs),theabrownines(TBs)and TRs/TFs ratio in converted tea brews under two-stage enzyme catalyzed fermentation and extraction conditions were further compared between different treatments,based on which the optimised conditions were *** the two-stage enzymatic processing,75 kinds of volatile compounds were identified in all processed samples,and the contents of TFs,TRs,TBs and TRs/TFs ratio could be optimized by adjusting different procedures and *** overall properties of final product were compared with two types of commercial *** quality IBT with desired properties and antioxidant activity can be manufactured using fresh tea leaves by two-stage enzymatic processing approach.

关键词： Instant black tea Liquid-state fermentation Enzymatic-enhanced extraction Quality characteristics

Co-Ni Electromagnetic Coupling in Hollow Mo_(2)C/NC Sphere for Enhancing Electromagnetic Wave Absorbing Performance

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Chinese Journal of Chemistry 2023年第1期41卷 64-74页

作者： xiufang yang Wenming Gao Jiamin Chen Xing Lu Dong yang Yifan Kang Qi Liu Yuchang Qing Wenhuan Huang Key Laboratory of Chemical Additives for China National Light Industry College of Chemistry and Chemical EngineeringShaanxi University of Science and TechnologyXi'anShaanxi 710021China Northwest Institute of Mechanical and Electrical Engineering XianyangShaanxi 712099China State Key Laboratory of Solidification Processing School of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'anShaanxi 710072China

For enhancing the electromagnetic wave(EW)attenuation and adsorption,rational constructing and homogeneously distributing bimetallic electromagnetic coupling units in hollow structure is an effective way,but hard to ***,a CoNi-doped hybrid zeolite imidazole framework was synthesized as precursor,which was further converted into a hollow CoNi-bimetallic doped molyb-denum carbide sphere(H-CoNi@MoC/NC)through a two-step etching and calcination *** the loading amount of 15 wt%,a strong absorption of minimum reflection loss(RL_(min))of-60.05 dB at 7.2 GHz with the thickness of 3.1 mm and a wide effective ad-sorption bandwidth(EAB)of 3.52 GHz at the thickness of 2.5 mm were achieved,which was far beyond the reported MoC-based metallic *** crucial synergistic Co-Ni electromagnetic coupling effect in the composite was characterized,not only enhanc-ing the dipolar/interfacial polarization,but also promoting the impedance matching,displaying the optimized EW absorbing perfor-mance.

关键词： Electromagnetic wave absorbing materials Hollow structure Hybrid zeolite imidazolate frameworks Microwave absorption Electromagnetic coupling

Early application of nerve growth factor affects serum inflammatory cytokine levels in neonatal hypoxic ischemic encephalopathy

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Neural Regeneration Research 2007年第7期2卷 437-439页

作者： Jingguo Chen Huijuan Huang Kaijun Zheng Ronghua Xia Jian Chen xiufang yang Chunhua Ye Qiang Lin Department of Neonatology Sun Yat-sen Hospital of Sun Yat-sen University Zhongshan 528403 Guangdong Province China

BACKGROUND： It has been demonstrated that there are changes of various cytokines, chemokines and adhesion factors in neonatal hypoxic ischemic encephalopathy （HIE）. What are the changes of interleukin-6 and interleukin-18 in serum of HIE neonates.OBJECTIVE： To observe the dynamic changes of interleukin-6 and interleukin-18 in peripheral serum at different time after HIE in neonates, and analyze the possible therapeutic efficacy of early application of NGF.DESIGN： A non-randomized controlled observation synchronically.SETTING： Department of Neonatology, Sun Yat-sen Hospital affiliated to Sun Yat-sen University.PARTICIPANTS： Sixty neonates with HIE were selected from the Department of Neonatology, Sun Yat-sen Hospital affiliated to Sun Yat-sen University from January 2004 to October 2006, including 32 boys and 28 girls, who were all accorded with the diagnostic standards for moderate to severe HIE. The neonates were divided into two groups NGF-treated group （n =30）, HIE group （n =30）. The HIE neonates in the NGF-treated group were given routine treatment and intramuscular injection of NGF within 24 hours after birth. Those in the HIE group were given routine treatments. Meanwhile, 30 apneic normal neonates （17 boys and 13 girls） at the same period were selected as the control group. The gestational age was 37 - 42 weeks in all the three groups, the body mass at birth was 2 500 - 4 000 g. Informed contents were obtained from the relatives of all the enrolled neonates.METHODS： The HIE neonates in the NGF-treated group were given routine treatment and intramuscular injection of NGF （2 000 U） within 24 hours after birth, once a day, 10 days as a course. Those in the HIE group were given routine treatments. Blood samples （3 mL） were drawn from femoral vein in all the neonates 1, 3 and 7 days after birth. The levels of interleukin-6 and interleukin-18 in serum were detected with enzyme-linked immunoabsorbent assay （ELISA）.MAIN OUTCOME MEASURES： Serum levels of i

关键词： cerebral hypoxia ischemia brain nerve growth factor interleukin-6 interleukin-18

Sub-stochiometric MoO_(x) by radio-frequency magnetron sputtering as hole-selective passivating contacts for silicon heterojunction solar cells

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Chinese Physics B 2022年第9期31卷 597-603页

作者： xiufang yang Shengsheng Zhao Qian Huang Cao Yu Jiakai Zhou Xiaoning Liu Xianglin Su Ying Zhao Guofu Hou Institute of Photoelectronic Thin Film Devices and Technology of Nankai University Tianjin 300350China Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin Tianjin 300350China Collaborative Innovation Center of Chemical Science and Engineering(Tianjin) Tianjin 300072China Engineering Center of Thin Film Photoelectronic Technology of Ministry of Education Tianjin 300350China Suzhou Maxwell Automation Equipment Co.Ltd Suzhou 215299China

The silicon heterojunction(SHJ)solar cell has long been considered as one of the most promising candidates for the next-generation PV *** metal oxides(TMOs)show good carrier selectivity when combined with c-Si solar *** has led to the rapid demonstration of the remarkable potential of TMOs(especially MoO_(x))with high work function to replace the p-type a-Si:H emitting ***_(x) can induce a strong inversion layer on the interface of n-type c-Si,which is beneficial to the extraction and conduction of *** this paper,the radio-frequency(RF)magnetron sputtering is used to deposit MoO_(x) *** optical,electrical and structural properties of MoO_(x) films are measured and analyzed,with focus on the inherent compositions and work *** the MoO_(x) films are applied into SHJ solar *** the MoO_(x) works as a buffer layer between ITO/p-a-Si:H interface in the reference SHJ solar cell,a conversion efficiency of 19.1%can be *** the MoOx is used as a hole transport layer(HTL),the device indicates a desirable conversion efficiency of 17.5%.To the best of our knowledge,this current efficiency is the highest one for the MoO_(x) film as HTL by RF sputtering.

关键词： radio-frequency magnetron sputtering silicon heterojunction(SHJ)solar cell MoO_(x) hole transport layer

末次刈割时间对3种紫花苜蓿越冬前后根颈非结构碳氮含量的影响

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西北农林科技大学学报（自然科学版） 2023年第1期51卷 9-16页

作者：杨秀芳赤峰市农牧科学研究所内蒙古赤峰024031

【目的】研究科尔沁沙地3种2年生紫花苜蓿品种越冬前后根颈非结构碳氮含量对末次刈割时间的响应。【方法】选择3种2年生紫花苜蓿(WL168HQ、WL298HQ、佳盛),在不同时间(2020年8月11日(C1)、8月26日(C2)、9月13日(C3)、9月27日(C4)、10月1... 详细信息

【目的】研究科尔沁沙地3种2年生紫花苜蓿品种越冬前后根颈非结构碳氮含量对末次刈割时间的响应。【方法】选择3种2年生紫花苜蓿(WL168HQ、WL298HQ、佳盛),在不同时间(2020年8月11日(C1)、8月26日(C2)、9月13日(C3)、9月27日(C4)、10月13日(C5))进行末次刈割,于2020年10月15日(T1)、11月10日(T2)、2021年3月10日(T3)、4月10日(T4)、5月10日(T5)挖根采样,测定3种紫花苜蓿越冬前(T1、T2)和越冬后(T3、T4、T5)根颈中的非结构碳氮含量。【结果】越冬前随时间推移,3种紫花苜蓿不同末次刈割处理根颈淀粉含量均呈现降低趋势,可溶性糖含量均呈现升高趋势;越冬前11月份和越冬后3月份,WL298HQ品种C2刈割处理根颈淀粉和可溶性糖含量显著高于其他末次刈割处理(P<0.05);越冬前11月份和越冬后4月份,佳盛品种C2刈割处理、WL168HQ品种C3处理根颈淀粉和可溶性糖含量显著高于其他末次刈割处理(P<0.05)。从秋冬到翌年返青,根颈游离氨基酸含量呈先上升后下降的趋势;在晚秋时节(T1),3种紫花苜蓿均以C5刈割处理游离氨基酸含量最高;次年3月份(T3)和5月份(T5),3种紫花苜蓿各末次刈割处理根颈游离氨基酸含量变化无规律性。晚秋时节(T1),WL168HQ和佳盛的C4刈割处理可溶性蛋白含量显著低于其他末次刈割处理(P<0.05);晚秋时节(T1)和返青萌动期(T4),WL298HQ的C4和C3刈割处理可溶性蛋白含量分别显著低于其他3个末次刈割处理(P<0.05)。在4月份返青萌动期,WL298HQ所有刈割处理根颈淀粉和可溶性糖含量均低于WL168HQ和佳盛;在越冬前的10和11月份,WL168HQ所有刈割处理根颈可溶性蛋白含量均高于WL298HQ和佳盛。【结论】越冬前的10月和11月,抗寒性强的苜蓿品种根颈可溶性蛋白含量高于抗寒性弱的品种;越冬后的4月份,抗寒性强的苜蓿品种根颈淀粉和可溶性糖含量高于抗寒性弱的品种。抗寒性越强的苜蓿品种,较晚进行末次刈割对其抗寒能力的影响越小。

关键词：紫花苜蓿刈割时间非结构碳氮抗寒性

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醇酸树脂微胶囊的制备及环氧涂层自修复性能

化工进展 2020年第7期39卷 2782-2787页

作者：雷瑞马养民杨秀芳陕西科技大学化学与化工学院陕西西安710021 陕西省轻化工助剂重点实验室陕西西安710021

采用三聚氰胺-脲醛树脂(MUF)为壁材、合成的花椒籽油醇酸树脂为芯材,原位聚合法制备自修复微胶囊,探讨了微胶囊的制备工艺。并采用扫描电子显微镜(SEM)、红外光谱仪(FTIR)、热重分析仪(TGA)和粒径分析仪对微胶囊的表面形貌、化学结构、... 详细信息

采用三聚氰胺-脲醛树脂(MUF)为壁材、合成的花椒籽油醇酸树脂为芯材,原位聚合法制备自修复微胶囊,探讨了微胶囊的制备工艺。并采用扫描电子显微镜(SEM)、红外光谱仪(FTIR)、热重分析仪(TGA)和粒径分析仪对微胶囊的表面形貌、化学结构、热稳定性及其粒径分布进行了测试表征。将醇酸树脂微胶囊分散到环氧基体中,研究了环氧涂层的力学性能和自修复性能。实验结果表明,当乳化剂浓度为2.0g/L、芯壁比为2∶1、终点pH为3.5时,微胶囊呈球形结构,无明显的缺陷和损伤,平均粒径为97.44μm,热稳定性良好。当添加质量分数5%的微胶囊时,与未添加微胶囊的自修复涂层相比,其弯曲强度、拉伸强度、黏结强度及其冲击强度分别提高了50.4%、50.0%、40.0%及25.2%,且涂层的自修复性能良好。

关键词：环氧树脂微胶囊醇酸树脂修复聚合物复合材料

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正火对汽车齿轮锻坯性能的影响

热加工工艺 2017年第24期46卷 238-241页

作者：杨秀芳包头职业技术学院内蒙古包头014035

对齿轮锻坯进行了三种不同工艺的正火处理,并进行了耐磨损性能和力学性能的测试与分析。结果表明,与常规正火相比,等温正火试样的磨损体积减小35%,抗拉强度、屈服强度和断后伸长率分别提高13%、25%、27%;磁场正火试样的磨损体积减小63%... 详细信息

对齿轮锻坯进行了三种不同工艺的正火处理,并进行了耐磨损性能和力学性能的测试与分析。结果表明,与常规正火相比,等温正火试样的磨损体积减小35%,抗拉强度、屈服强度和断后伸长率分别提高13%、25%、27%;磁场正火试样的磨损体积减小63%,抗拉强度、屈服强度和断后伸长率分别提高28%、38%、46%。汽车齿轮锻坯正火工艺优选磁场正火工艺。

关键词：汽车齿轮正火处理等温正火磁场正火力学性能耐磨损性能

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信息生态位宽度研究

图书馆学研究 2010年第1期 23-26,47页

作者：杨秀芳山西大学管理学院

本文借鉴现代生态学的基本原理详细分析信息生态位宽度的概念、基本原理,并对信息生态位宽度的测度进行研究,提出基于Levins物种生态位宽度测度公式的一维信息生态位宽度测度公式,以及多维信息生态位宽度测度公式。

关键词：信息生态位宽度信息生态位宽度测度多维信息生态位