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Nano Research 2023年第2期16卷 2519-2527页

作者： Huimin Mao Xiaobin liu Siqi Wu Yixin Fu guishan liu Guizhong Zhou Lei Wang Key Laboratory of Eco-chemical Engineering International Science and Technology Cooperation Base of Eco-chemical Engineering and Green ManufacturingQingdao University of Science and TechnologyQingdao 266042China College of Environment and Safety Engineering Qingdao University of Science and TechnologyQingdao 266042China College of Chemistry and Molecular Engineering Qingdao University of Science and TechnologyQingdao 266042China Chaofeng Steel Structure Group Co. Ltd.Hangzhou 311215China

Rational design and synthesis of bifunctional oxygen electrocatalysts with high activity and stability are key challenges in the development of rechargeable Zn-air batteries(ZABs).In this paper,tungsten carbide(WC)and Co_(7)Fe_(3)embedded in N,P co-doped hierarchical carbon(WC/Co_(7)Fe_(3)-NPHC)was prepared by using zeolite imidazolate frameworks as *** functional theory demonstrates that the mutual adjustment among the WC,Co_(7)Fe_(3),and N,P co-doped carbon at the three-phase heterojunction interface makes the catalyst possess moderate adsorption strength,and greatly improves the conductivity and electron transfer rate of the *** a result,the WC/Co_(7)Fe_(3)-NPHC exhibits a low overall oxygen redox potential difference of 0.72 V,while the ZAB assembled by WC/Co_(7)Fe_(3)-NPHC as an air cathode exhibits ultra-long cycle stability of over 550 ***,WC/Co_(7)Fe_(3)-NPHC can keep good charge and discharge stability at different bending angles when applied to flexible solid ZAB.

关键词： heterojunction hierarchical structure bifunctional oxygen electrocatalyst Zn-air battery

Naringenin inhibits lipid accumulation by activating the AMPK pathway in vivo and in vitro

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Food Science and Human Wellness 2023年第4期12卷 1174-1183页

作者： Xiaoyu Cai Songxue Wang Huali Wang Suwen liu guishan liu Huibin Chen Ji Kang Hao Wang State Key Laboratory of Food Nutrition and Safety College of Food Science and EngineeringTianjin University of Science and TechnologyTianjin 300457China China National Center for Food Safety Risk Assessment Beijing 100022China College of Food Science and Technology Hebei Normal University of Science and TechnologyQinhuangdao 066004China School of Food and Wine Ningxia UniversityYinchuan 750021China College of Life Sciences Fujian Normal UniversityFuzhou 350117China

The aim of this study was to explore the lipid-lowering effect of naringenin and the underlying mechanism in high-fat-diet-fed SD rats and 3T3-L1 *** this study,SD rats were divided into the normal chow diet group(NCD),high fat diet group(HFD),three treatment groups feeding high-fat diet with naringenin(100,200,400 mg/kg)for 12 *** indicated that naringenin treatment decreased total cholesterol(TC),triglyceride(TG)and the non-high-density lipoprotein cholesterol(non-HDL-C)levels in *** also alleviated hepatic steatosis and reduced the adipocyte size in the epididymis in high-fat-diet-induced SD *** addition,naringenin(25−75μg/mL)decrease TG and TC levels in 3T3 mature *** molecular mechanism of naringenin in the treatment of obesity were predicted by using network ***-time PCR analysis results showed that naringenin regulated the expression of lipid metabolism ***,naringenin increased the AMPK(AMP-activated protein kinase)activity and the expression of AMPK phosphorylated protein in 3T3 mature *** the inhibitory effect of naringenin on lipid accumulation in 3T3 adipocytes was abolished by Compound *** docking results indicated that naringenin could bind to AMPK *** results indicated naringenin reduced lipid accumulation through AMPK pathway.

关键词： Naringenin Lipid accumulation Molecular docking

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模拟运输振动对枸杞果实贮藏品质的影响

食品工业科技 2022年第21期43卷 368-374页

作者：刘梦琪董福佳刘贵珊宁夏大学食品与葡萄酒学院宁夏银川750021

研究运输振动对枸杞果实贮藏品质的影响,为其采后物流运输减损提供理论指导。实验选取‘宁杞7号’枸杞为试材,采用模拟运输的方法,将瓦楞纸箱固定于振动平台上,在3 Hz的振动频率下进行0(对照)、4、8、12和16 h的振动处理,于4±1℃,93%... 详细信息

研究运输振动对枸杞果实贮藏品质的影响,为其采后物流运输减损提供理论指导。实验选取‘宁杞7号’枸杞为试材,采用模拟运输的方法,将瓦楞纸箱固定于振动平台上,在3 Hz的振动频率下进行0(对照)、4、8、12和16 h的振动处理,于4±1℃,93%±3%相对湿度(Relative Humidity,RH)的保鲜冰箱中贮藏20 d,测定不同贮藏期内枸杞果实硬度、色泽、超氧阴离子自由基含量以及过氧化氢酶、过氧化物酶和超氧化物歧化酶活性。结果表明,与对照组相比,机械振动加速了硬度和色泽值的下降;超氧阴离子含量、过氧化氢酶、过氧化物酶和超氧化物歧化酶较对照组均有显著升高(P<0.05),其中,16 h振动处理对枸杞果实贮藏期品质变化影响较大。机械振动对枸杞品质的影响是逐渐累积的,振动时间越久对品质的损伤越大,同时加速枸杞果实营养物质降解和品质劣变的速度。因此,在运输过程中避免振动或缩短振动时间具有重要意义。

关键词：枸杞果实模拟运输机械振动贮藏品质

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Dual-strategy of hetero-engineering and cation doping to boost energy-saving hydrogen production via hydrazine-assisted seawater electrolysis

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Science China Materials 2022年第6期65卷 1539-1549页

作者： Qingping Yu Jingqi Chi guishan liu Xuanyi Wang Xiaobin liu Zhenjiang Li Ying Deng Xinping Wang Lei Wang Key Laboratory of Eco-chemical Engineering Key Laboratory of Optic-electric Sensing and Analytical Chemistry of Life ScienceTaishan Scholar Advantage and Characteristic Discipline Team of Eco Chemical Process and TechnologyQingdao University of Science and TechnologyQingdao 266042China College of Chemistry and Molecular Engineering Qingdao University of Science and TechnologyQingdao 266042China College of Environment and Safety Engineering Qingdao University of Science and TechnologyQingdao 266042China College of Chemical Engineering Qingdao University of Science and TechnologyQingdao 266042China Hainan Key Laboratory of Laser Technology and Photoelectric Functional Materials Collage of Chemistry&Chemical EngineeringHainan Normal UniversityHaikou 571158China

When compared with pure water,hydrogen produced by seawater electrolysis has a better practical application *** replacing the oxygen evolution reaction(OER)and competitive chlorine evolution reaction(ClER)with the thermodynamically favorable anodic hydrazine oxidation reaction(HzOR)in alkaline seawater,energy-saving hydrogen production can be *** this study,Fe/Co dual-doped Ni_(2)P and MIL-FeCoNi heterostructures(FeCo-Ni_(2)P@MIL-FeCoNi)arrays with simultaneous cation doping and hetero-engineering provide excellent bifunctional electrocatalytic performance for HzOR and hydrogen evolution reaction(HER)in alkaline seawater *** hydrazine splitting(OHzS)in seawater is impressive,with a low cell voltage of only 400 mV required to reach 1000 mA cm^(−2)and stable operation for 1000 h to maintain above 500 mA cm^(−2).As a proof-of-concept,the OHzS system can save 3.03 kW h when producing 1.0 normal cubic meter(Nm_(3))of H_(2) when compared with the N_(2)H_(4)-free seawater system,resulting in energy-saving H_(2) *** functional theory calculations show that the combination of Co-doping and the fabrication of FeCo-Ni_(2)P and MIL-FeCoNi heterointerfaces can result in a low water dissociation barrier,optimized hydrogen adsorption free energy toward HER,and favorable adsorbed dehydrogenation kinetics for *** processing route paves the way for a practical approach to the efficient utilization of hydrogen,which is abundant in the ocean energy field,to achieve a carbon-neutral hydrogen economy.

关键词： metal-organic framework bifunctional electrocatalyst seawater splitting energy-saving hydrogen production

Application of SrAl_2O_4:Eu^(2+) Down–conversion Powder in Flexible Dye–Sensitized Solar Cells

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Journal of the Chinese Ceramic Society 2015年第2期 103-110页

作者： WANG Lijun LI Yueying HAO Hongshun GUO Weihua SU Qing JIN Shanshan QIN Lei GAO Wenyuan liu guishan HU Zhiqiang Department of Inorganic Nonmetallic Materials Engineering Dalian Polytechnic University Liaoning Provincial College Key Laboratory of New Materials and Material Modification Dalian Polytechnic University National Engineering Research Center of Seafood Dalian Polytechnic University

TiO2 nanotube(NT) was firstly prepared on titanium foil by an electrochemical anodization method, and then modified via subsequent deposition of a layer of SrAl2O4:Eu2+ phosphor embedded within TiO2 nanoparticles to fabricate photoanodes of dye–sensitized solar cells(DSSCs). The effect of doping down–conversion Sr Al2O4:Eu2+ phosphor in DSSCs was investigated. SrAl2O4:Eu2+ can effectively convert ultraviolet light to visible light within the range of the dye commonly used in DSSC to increase the photocurrent of DSSC, and enhance the open–circuit voltage by a p–type doping effect. When the ratio of Sr Al2O4:Eu2+ in the doping layer is optimized to be 1wt.%, the photoelectric conversion efficiency of the DSSC reaches 3.09%, which is increased by 38.6%, compared to that of the DSSC without Sr Al2O4:Eu2+ doping.

关键词： dye–sensitized solar cells TiO2 nanotube down-conversion luminescence p-type doping

基于激光束匹配的高光谱遥感图像压缩重构算法

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激光杂志 2020年第12期41卷 88-92页

作者：徐爽刘贵珊银川能源学院银川750021 宁夏大学银川750021

传统高光谱遥感图像压缩重构算法重点在信号传输与存储方面,采样频率要大于信号宽度的两倍,硬件实现较为困难,为此提出基于激光束匹配的高光谱遥感图像压缩重构算法研究。采用K-SVD算法训练冗余字典,稀疏分解高光谱遥感图像,得到遥感图... 详细信息

传统高光谱遥感图像压缩重构算法重点在信号传输与存储方面,采样频率要大于信号宽度的两倍,硬件实现较为困难,为此提出基于激光束匹配的高光谱遥感图像压缩重构算法研究。采用K-SVD算法训练冗余字典,稀疏分解高光谱遥感图像,得到遥感图像稀疏分解系数,以此为基础,量化处理遥感图像稀疏分解系数,通过JPEG-LS无损压缩算法压缩遥感图像,主要分为三个阶段:预测阶段、Golomb编码阶段与游程模式编码阶段,以得到的遥感图像压缩结果为依据,基于激光束匹配理论对遥感图像进行匹配追踪重构,实现了高光谱遥感图像的压缩重构。仿真实验结果显示:提出算法完成的图像压缩比例随着噪声程度的增加而下降,图像重构范围实际值80.00%~90.01%,超过最低重构程度限值75.56%,充分说明提出算法具备较好的压缩重构效果。

关键词：激光束匹配高光谱遥感图像压缩重构

衬底温度对磁控溅射制备DSSCs碳对电极的影响

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太阳能学报 2013年第10期34卷 1735-1740页

作者：刘贵山刘姝泓沈晓月胡志强姜妍彦大连工业大学无机非金属材料研究室新材料与材料改性省高校重点实验室新能源材料研究所大连116034

采用双极脉冲磁控溅射法以石墨为靶材在FTO玻璃上制备染料敏化太阳电池(DSSCs)碳对电极。研究衬底温度对碳膜的结构及性能的影响。用四探针测试仪对碳膜的方块电阻进行测试,拉曼光谱分析碳键结构,原子力显微镜对表面形貌进行表征。并组... 详细信息

采用双极脉冲磁控溅射法以石墨为靶材在FTO玻璃上制备染料敏化太阳电池(DSSCs)碳对电极。研究衬底温度对碳膜的结构及性能的影响。用四探针测试仪对碳膜的方块电阻进行测试,拉曼光谱分析碳键结构,原子力显微镜对表面形貌进行表征。并组装电池,用太阳光模拟器测试电池的光电性能。实验结果表明:随着衬底温度的升高,sp2碳键含量增多,石墨化程度提高,碳膜表面颗粒长大,表面粗糙度增加,碳膜的方块电阻减小。当衬底温度为400℃时,电池的光电转换率为0.99%。

关键词：染料敏化太阳电池碳对电极磁控溅射衬底温度

真空预冷结合微孔膜包装对鲜枸杞贮藏品质的影响

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农业工程学报 2021年第10期37卷 245-252页

作者：鲁玲康宁波刘贵珊贺晓光李娟宁夏大学食品与葡萄酒学院银川750021

为了延长鲜枸杞贮藏保鲜期,该研究通过真空预冷结合微孔膜包装对鲜枸杞的贮藏品质进行研究,设置不同预冷终温(2、4、6℃)和终压(800~1000、1000~1200、1200~1500 Pa)对鲜枸杞进行真空预冷处理,通过比较真空预过程中鲜枸杞失重率、蜡质... 详细信息

为了延长鲜枸杞贮藏保鲜期,该研究通过真空预冷结合微孔膜包装对鲜枸杞的贮藏品质进行研究,设置不同预冷终温(2、4、6℃)和终压(800~1000、1000~1200、1200~1500 Pa)对鲜枸杞进行真空预冷处理,通过比较真空预过程中鲜枸杞失重率、蜡质层和呼吸强度指标来确定较优工艺参数;之后将真空预冷较优工艺参数下的鲜枸杞用微孔膜包装后在(-1±0.5℃)的冷库中进行贮藏,以微孔膜包装处理和未经任何处理的鲜枸杞作为对照组,比较贮藏过程中硬度、可溶性固形物(Total Soluble Solids,TSS)、色差、呼吸强度、过氧化氢酶(Catalase,CAT)活性指标来综合分析不同处理对鲜枸杞贮藏品质的影响。结果表明:终温6℃和终压800~1000 Pa对鲜枸杞失重率影响较小;终温6℃和终压1200~1500 Pa对鲜枸杞内表皮结构损伤较小;终温2℃和终压800~1000 Pa鲜枸杞呼吸强度最低,综合考虑3个指标,终温6℃,终压1200~1500 Pa为鲜枸杞真空预冷较优工艺参数;在贮藏期间,真空预冷结合微孔膜包装与其他两组相比较,可有效延缓鲜枸杞硬度和TSS下降,降低呼吸强度,抑制色差变化和CAT活性的下降(P<0.05)。该研究为鲜枸杞贮藏保鲜提供新方法。

关键词：贮藏品质控制真空预冷微孔膜包装鲜枸杞

miR-483-3p增强胰腺癌对吉西他滨敏感性及分子机制研究

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大连理工大学学报 2025年第1期65卷 30-37页

作者：刘青肖桂山大连理工大学化工学院辽宁大连116024

吉西他滨耐药限制了其对胰腺癌的治疗效果,而传统化学药物无法有效克服吉西他滨对胰腺癌的耐药.研究表明,microRNA(miRNA)的异常表达与肿瘤发生、发展和化疗耐药性有关.对miR-483-3p在胰腺癌吉西他滨耐药中的作用和潜在机制进行了研究.q... 详细信息

吉西他滨耐药限制了其对胰腺癌的治疗效果,而传统化学药物无法有效克服吉西他滨对胰腺癌的耐药.研究表明,microRNA(miRNA)的异常表达与肿瘤发生、发展和化疗耐药性有关.对miR-483-3p在胰腺癌吉西他滨耐药中的作用和潜在机制进行了研究.qPCR结果显示miR-483-3p在胰腺癌耐药细胞中显著下调.miR-483-3p minics瞬时转染显著提高了耐药细胞内miR-483-3p的表达水平,显著减弱了耐药细胞的增殖、迁移、转移和侵袭能力,恢复了吉西他滨的反应性.Western blot结果显示miR-483-3p抑制PI3K和p-AKT蛋白的表达水平,抑制Bcl2蛋白表达,促进Bax、Bad和cleaved-Caspase-3蛋白表达,促进细胞凋亡进程.总之,研究结果表明miR-483-3p通过抑制PI3K/AKT信号通路促进细胞凋亡,增加胰腺癌对吉西他滨的敏感性,miR-483-3p可能是吉西他滨耐药胰腺癌患者的潜在治疗策略.

关键词： miR-483-3p 胰腺癌吉西他滨耐药性 miRNA

区块链增强果蔬质量追溯可信度方法研究与系统实现

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农业机械学报 2022年第2期53卷 309-315,345页

作者：弋伟国何建国刘贵珊康宁波宁夏大学物理与电子电气工程学院银川750021 宁夏大学食品与葡萄酒学院银川750021

质量追溯相关数据通过物联网感知设备采集后添加到区块链,在数据存储环节可以解决数据易被篡改问题从而增强数据可信度。数据直接存储在区块链中会造成系统吞吐量小、响应时间长,利用“数据库+区块链”的双存储设计虽然能大大提高响应速... 详细信息

质量追溯相关数据通过物联网感知设备采集后添加到区块链,在数据存储环节可以解决数据易被篡改问题从而增强数据可信度。数据直接存储在区块链中会造成系统吞吐量小、响应时间长,利用“数据库+区块链”的双存储设计虽然能大大提高响应速度,但是针对果蔬质量追溯系统,其响应速度依然不能满足要求。基于哈希加密算法的不可逆性、区块链数据结构天然的不可篡改性和Hyperledger Fabric平台完善的成员管理机制在数据存储环节增强了数据可信度,针对果蔬质量追溯的特点设计了数据哈希值二次上链和验证的方法,改进了“数据库+区块链”的双存储设计,改进后的方法在数据查询方面时间复杂度由原来的线性阶降低为常数阶。通过试验发现,所设计的系统能够实现数据无法篡改进而提高数据可信度,改进后的方法在数据查询方面效率大幅提升,平均查询用时为0.066 s,且随着数据条数增加查询用时基本保持不变,解决了区块链技术应用在果蔬质量追溯系统中查询效率低的问题。基于Hyperledger Fabric平台,利用改进后的方法开发实现了果蔬质量追溯系统,并取得了较好的应用效果。

关键词：果蔬质量追溯区块链哈希值 Hyperledger Fabric