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Multifunctional Film Assembled from N‑Doped Carbon Nanofiber with Co–N_(4)–O Single Atoms for Highly Efficient Electromagnetic Energy Attenuation

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Nano-Micro Letters 2024年第11期16卷 359-376页

作者： Jia Xu Bei Li Zheng Ma xiao Zhang chunling Zhu Feng Yan Piaoping Yang Yujin Chen College of Materials Science and Chemical Engineering Harbin Engineering UniversityHarbin 150001People’s Republic of China Key Laboratory of In‑Fiber Integrated Optics College of Physics and Optoelectronic EngineeringHarbin Engineering UniversityHarbin 150001People’s Republic of China

Single-atom materials have demonstrated attractive physicochemical ***,understanding the relationships between the coordination environment of single atoms and their properties at the atomic level remains a considerable ***,a facile waterassisted carbonization approach is developed to fabricate well-defined asymmetrically coordinated Co–N_(4)–O sites on biomass-derived carbon nanofiber(Co–N_(4)–O/NCF)for electromagnetic wave(EMW)*** such nanofiber,one atomically dispersed Co site is coordinated with four N atoms in the graphene basal plane and one oxygen atom in the axial ***-depth experimental and theoretical studies reveal that the axial Co–O coordination breaks the charge distribution symmetry in the planar porphyrin-like Co–N_(4) structure,leading to significantly enhanced dielectric polarization loss relevant to the planar Co–N_(4) ***,the film based on Co–N_(4)–O/NCF exhibits light weight,flexibility,excellent mechanical properties,great thermal insulating feature,and excellent EMW absorption with a reflection loss of−45.82 dB along with an effective absorption bandwidth of 4.8 *** findings of this work offer insight into the relationships between the single-atom coordination environment and the dielectric performance,and the proposed strategy can be extended toward the engineering of asymmetrically coordinated single atoms for various applications.

关键词： Co single atoms Asymmetric coordination structure Axial oxygen coordination Electromagnetic wave absorption Multifunctional film

Changes of the Content and Antioxidant Activity of Natural Peptides in Germinated Soybeans

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Agricultural Biotechnology 2014年第4期3卷 1-3,7页

作者： chunling xiao Ruifeng LIANG College of Food Science Shanxi Normal University

[ Objective] This study aimed to investigate the content and antioxidant activity of natural peptides in various soybean sprouts during the germination process. [Method] By using black soybean sprouts, yellow soybean sprouts and green soybean sprouts as raw materials, the content, DPPH ·clearance rate, OH · clearance rate and reduction capacity of natural peptides in various soybean sprouts at different germination time were determined, to evaluate the antioxidant capacity of natural peptides and compare it with that of Vc. [ Result] The results showed that the contents of natural peptides in black soybean sprouts, yellow soybean sprouts and green soybean sprouts varied at different germination time. To be specific, the content of natural peptides in black soybean sprouts reached the maximmn of 0. 194 mg/g at 2 d post-germination; the content of natural pepfides in yellow soybean sprouts reached the maximum of 0.231 mg/g at 2 d post-germination; the content of natural peptides in green soybean sprouts exhibited a negative correlation with the germination time, which reached the maximum of 0. 164 mg/g at 1 d post-germination. [ Conclusion] According to the determination of DPPH ·clearance rate, OH ·clearance rate and reduction capacity of natural peptides in three varieties of soybean sprouts, natural peptides in yellow soybean sprouts possess the highest antioxidant activity, followed by those in black soybean

关键词： Soybean sprouts Natural peptide Antioxidant activity

Effects of Different Drying Methods on Physiological Activities of Kiwifruit

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Agricultural Biotechnology 2018年第6期7卷 68-70,73页

作者： Tong LI chunling xiao School of Food Science Shanxi Normal University

[Objectives] This paper was to clarify the effects of different drying methods on the physiological activities of kiwifruit,so as to provide theoretical bases for the drying processing of kiwifruit.[Methods]With kiwifruit as the research object,the effects of hot air drying,microwave drying,and vacuum freeze drying on the active ingredients in dried kiwifruit were studied,and antioxidant activity of the ingredients were determined through the scavenging capacity of 1,1-phenyl-2-picrylhydrazyl free radicals( DPPH),hydroxyl radical scavenging capacity and the antioxidant capacity of ferrous ions.[Results] Vacuum freeze drying greatly reduced the physiological activities of kiwifruit,followed by microwave *** air drying was the best choice for dehydration of *** the same conditions,the total flavonoid content of kiwifruit from hot air drying was 70.12 mg/ml,and the DPPH· free radicals scavenging ability of the treatment solution was the strongest,with the scavenging rate reaching 9.42%.The OH radicals scavenging rate was the highest at the concentration of 0.015 mg/ml,reaching69.92%.The absorbance reached the maximum at the concentration of 0.025 mg/ml,and the ferrous ion reduction capacity was also the greatest with the absorbance of 2.542.[Conclusions] Hot air drying could well maintain the shape and nutrients of kiwifruit,making it a proper drying method for kiwifruit processing.

关键词： Different drying methods Flavonoid Antioxidant activity Kiwifruit

Effects of Temperature and pH on the Physiological Activity of Grape Juice

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Agricultural Biotechnology 2019年第2期8卷 35-38,41页

作者： Danlei LI chunling xiao College of Food Science Shanxi Normal University

This study was conducted to investigate the effects of temperature and pH on polyphenol and flavonoid contents in grape juice and its antioxidant activity. Two groups(group A and group B) were set. Group A was set with different pH values: 3.0, 3.5, 4.0, 4.5 and 5.0; and group B was set with different temperatures: 65, 72, 79, 86 and 93 ℃. The grape juice was treated according to set methods, and two groups of samples were obtained. The contents of polyphenols and flavonoids in each test solution were determined, and the DPPH·free radical system and trivalent Fe reduction system were established to measure and compare the antioxidant activity of groups A and B. The results showed that within the set ranges, the effects of pH and temperature on the content of flavonoids in grape juice were not significant; the test solution with a pH of 4.5 and the test solution with a temperature at 72 ℃ had the strongest capacities of scavenging free radicals, and exhibited scavenging rates of 6.82% and 9.43%, respectively; the test solution with a pH of 4.5 and the test solution with a temperature at 65 ℃ had the strongest capacities of reducing ferric ions. It could be seen from the above four aspects comprehensively, within the set test ranges, the suitable pH was 4.5, and the suitable temperature was 65 ℃.

关键词： Grape juice Flavonoid Polyphenol Antioxidant activity

“食品试验设计与统计分析”的教学改革探索与实践

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农产品加工 2024年第9期 134-136页

作者：冯赛赛吴玉马冰洋肖春玲张亮亮徐建国山西师范大学食品科学学院山西太原030031 山西师范大学生命科学学院山西太原030031

“食品试验设计与统计分析”是食品科学与工程专业的一门专业基础课,对于食品专业人才培养具有重要意义。近年来,“食品试验设计与统计分析”课程存在学生隐性逃课情况较为普遍、对课程重要性认识不足、学习困难、知识掌握程度不够等问... 详细信息

“食品试验设计与统计分析”是食品科学与工程专业的一门专业基础课,对于食品专业人才培养具有重要意义。近年来,“食品试验设计与统计分析”课程存在学生隐性逃课情况较为普遍、对课程重要性认识不足、学习困难、知识掌握程度不够等问题。基于此,展开教学课程改革探索和实践,以提升教师对课程知识的理解和把握程度为基石,以教学方法的不断改进和优化作为主要途径,以学生切实掌握并熟练应用为目标导向,最终通过教师培养、教学观念的改变、教学手段和互作机制的多样化、强化反馈机制等方法,进一步提升教学质量,培养食品行业高素质综合应用型人才。

关键词：食品试验设计与统计分析食品科学与工程专业教学改革

线上线下混合式教学方法在医学微生物学教学中的探索

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沈阳医学院学报 2024年第1期26卷 104-107页

作者：孙冶刘光焱杨彪肖纯凌车雨辰李新鸣李舒音沈阳医学院基础医学院病原生物学教研室辽宁沈阳110034 沈阳医学院基础医学院研究生院辽宁沈阳110034 沈阳医学院基础医学院免疫学教研室辽宁沈阳110034 沈阳医学院基础医学院人事处辽宁沈阳110034

目的:优化教学方法、调整教学内容及改革考核模式,提高医学微生物学的教学质量。方法:将同专业的2020级和2021级学生分为对照组和教改组,对照组采用传统教学法,教改组采用“线上+线下”混合式教学模式,融入线上学习资源和课程思政到理... 详细信息

目的:优化教学方法、调整教学内容及改革考核模式,提高医学微生物学的教学质量。方法:将同专业的2020级和2021级学生分为对照组和教改组,对照组采用传统教学法,教改组采用“线上+线下”混合式教学模式,融入线上学习资源和课程思政到理论内容,全过程考核体系联合应用到教学方法。采用全过程考核成绩和问卷调查相结合的形式进行教学质量评价。结果:通过考试成绩分析,与对照组相比,教改组的学生成绩显著提高(P<0.01);问卷调查结果显示,学生对线上线下混合式教学模式满意度达到97.5%,融入微生物热点问题和课程思政显著启发了学生学习兴趣,有更多的学生未来想从事微生物相关领域的工作。结论:实践结果表明,优化教学方法、调整教学内容及改革考核模式,可以激发学生的学习兴趣,提高学生的自主学习能力,提升教学质量。

关键词：混合式教学线上教学雨课堂课程优化教学改革

Effects of PM2.5 On Respiratory System and The Development of Probiotics in Respiratory Tract

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Effects of PM2.5 On Respiratory System and The Development o...

地方医学院校转型发展的动因与路径——以沈阳医学院为例

2017环境与公共健康学术会议暨中国环境科学学会环境医学与健康分会、中国毒理学会生化与分子毒理专业委员会2017年年会

作者： ZHANG Yu xiao chunling Key Laboratory of Environmental Pollution and Health Shenyang Medical College

When the atmosphere is polluted,the amount of suspended particulate matter in the atmosphere will increase,especially PM(fine particles).They are smaller in size with a large surface area and high activity,it is a toxic and harmful substance that is suspended in the air for long time,it has a long distance transmission capacity,with a small atmospheric composition,but occupies an important position in air *** Children’s respiratory tract is not a good resistant and the nasal mucosa is relatively weak resistance to pathogens less weak,pathogens from the nasal invasion to reach the throat,causing upper respiratory tract infection bronchial asthma,pneumonia and other *** infection not only affects healthy development,but also causes a lot of complications,serious also *** classification of respiratory tract bacteria,the preparation of probiotics by the dominant bacteria to regulate the diseases of the respiratory tract and the development of ***’s not a good resistant and the nasal mucosa is relatively weak resistance to pathogens less weak,pathogens from thenasal invasion to reach the throat,causing upper respiratory tract infection bronchial asthma,pneumonia and other *** infection not only affects healthy development,but also causes a lot of complications,serious also *** recent years,the treatment of intestinal probiotics and other diseases has reached a certain effect,but thhe application of probiotics in respiratory tract is less,the treatment of finished products needs further research and development.

关键词： PM2.5 Respiratory tract Upper respiratory tract infection Respiratory probiotics

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现代教育管理 2017年第3期 84-89页

作者：肖纯凌沈阳医学院辽宁沈阳110034

当前,我国政府正引导一批地方本科高校向应用型转变。地方医学院校转型发展要在中央和地方相关政策指导下进行,培养适应地方需要的应用型医学人才,服务于地方卫生经济社会发展。地方医学院校转型发展要考虑教育主管部门、行业人才市场... 详细信息

当前,我国政府正引导一批地方本科高校向应用型转变。地方医学院校转型发展要在中央和地方相关政策指导下进行,培养适应地方需要的应用型医学人才,服务于地方卫生经济社会发展。地方医学院校转型发展要考虑教育主管部门、行业人才市场及学校发展现状等实际情况,克服办学定位趋同、学科专业无特色等不适应转型发展的因素。

关键词：地方医学院校转型发展应用型人才

Allelopathic and antifungal activity of stem total alkaloids of Cyperus iria L

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Allelopathic and antifungal activity of stem total alkaloids...