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竹笋加工副产物中生物活性物质的研究进展

农产品加工 2024年第4期 114-120页

作者：梁安雅林可为毛国兴伍俏佳王锋刘袆帆潘天茂肖更生马路凯农业农村部岭南特色食品绿色加工与智能制造重点实验室仲恺农业工程学院轻工食品学院广东广州510225 广东省农业科学院蚕业与农产品加工研究所农业部功能食品重点实验室广东省农产品加工重点实验室广东广州510610 云浮市健安食品发展有限公司广东云浮527300 西藏自治区农牧科学院农产品开发与食品科学研究所西藏拉萨850000

竹笋肉质鲜嫩、清脆爽甜,是一种深受消费者喜爱的纯天然绿色健康食品。竹笋含有丰富的多糖、膳食纤维、黄酮和生物碱等生物活性物质,具有抗氧化、降血糖等功效。但随着竹笋加工业的不断发展,竹笋加工过程会产生大量笋头、笋壳等副产物,... 详细信息

竹笋肉质鲜嫩、清脆爽甜,是一种深受消费者喜爱的纯天然绿色健康食品。竹笋含有丰富的多糖、膳食纤维、黄酮和生物碱等生物活性物质,具有抗氧化、降血糖等功效。但随着竹笋加工业的不断发展,竹笋加工过程会产生大量笋头、笋壳等副产物,这些副产物往往被直接丢弃、燃烧或用作畜禽饲料,利用率较低,造成极大浪费,也对生态环境带来一定危害。这些副产物中同样含有较多生物活性物质,如何提高竹笋副产物的利用率逐渐成为竹笋产业迫切解决的问题。因此,对竹笋加工副产物中的天然活性物质(如多糖、膳食纤维、黄酮和生物碱等)的研究现状进行综述,总结了天然活性物质的提取方法、结构和活性作用与机制,以期为竹笋加工副产物活性物质的有效利用提供一定理论支撑。

关键词：竹笋加工副产物多糖膳食纤维黄酮生物碱

Biochar aerogel-based electrocatalyst towards efficient oxygen evolution in acidic media

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Biochar 2022年第1期4卷 533-545页

作者： Bin Hui Hongjiao Chen Chengfeng Zhou Liping Cai kewei Zhang Fengyu Quan Dongjiang Yang State Key Laboratory of Bio-Fibers and Eco-Textiles Shandong Collaborative Innovation Center of Marine Biobased Fiber and Ecological TextileInstitute of Marine Biobased MaterialsSchool of Materials Science and Engineering and School of Environmental Science and EngineeringQingdao UniversityQingdao 266071People’s Republic of China Department of Mechanical Engineering University of North TexasDentonTX 76207USA

The controllable synthesis of oxygen evolution reaction(OER)electrocatalyst is an urgent need to advance the develop-ment of sustainable energy conversion and storage.However,the OER efficiency in acidic media is seriously hindered by slow reaction kinetics.The traditional acidic OER electrocatalysts are more prone to be oxidized and corroded as results of unstable carrier structures and variable electronic states of active species.Herein,a high-performing biochar aerogel(BA)based electrocatalyst were realistically designed and synthetized via joint utilization of the terrestrial lignin and seaweed polysaccharide as carbon sources.Originating from the induction effect of"egg-box"structure in alginate and the self-template effect of lignosulfonate,the BA decorated with Ru/RuS_(2)particles was synthesized triumphantly.The as-synthesized electrocatalyst required a low overpotential of 228 mV to attain 10 ma cm^(−2)in 0.5 M H_(2)SO_(4)and exhibited a good stability for over 12,000 s.The good activity was strongly dependent on the assembled unique two-dimensional/three-dimensional(2D/3D)channels in carbon aerogels.Notably,the numerous defective sites at carbon could strongly interact with the Ru/RuS_(2)heterojunction for remarkably enhancing the catalytic activity and stability of whole catalytic system in acidic media.This work puts forward a novel and effective strategy towards the enhancement of the acidic OER process by rational regu-lations of the BA and the coupling effect in micro-interface.

关键词： Biochar aerogel Defective sites Ru-based compounds Acidic media Electrocatalytic oxygen evolution

Recycling and utilization of coal gasification residues for fabricating Fe/C composites as novel microwave absorbents

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International Journal of Minerals,Metallurgy and materials 2023年第3期30卷 591-599页

作者： Guomin Li Xiaojie Xue Lutao mao Yake Wang Lingxiao Li Guizhen Wang kewei Zhang Rong Zhang Yuexiang Wang Liping Liang School of materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China Key Laboratory of Advanced materials of Tropical Island Resources of Ministry of Education Hainan UniversityHaikou 570228China State Key Laboratory for Coal Conversion Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China China-Belarus Belt and Road Joint Laboratory on Electromagnetic Environment Effect Taiyuan 030032China

Under the background of a transformation of the global energy structure,coal gasification technology has a wide application prospect,but its by-product,the coal gasification residue(CGR),is still not being efficiently utilized for recycling.The CGR contains abundant carbon components,which could be applied to the microwave absorption field as the carbon matrix.In this study,Fe/CGR composites are fabricated via a two-step method,including the impregnation of Fe^(3+)and the reduction process.The influence of the different loading capacities of the Fe component on the morphology and electromagnetic properties is studied.Moreover,the loading content of Fe and the surface morphology of the Fe/CGR can be reasonably controlled by adjusting the concentration of the ferric nitrate solution.Meanwhile,Fe particles are evenly inserted on the CGR framework,which expands the Fe/CGR interfaces to enhance interfacial polarization,thus further improving the microwave-absorbing(ma)properties of composites.Particularly,as the Fe^(3+)concentration is 1.0 mol/L,the Fe/CGR composite exhibits outstanding performance.The reflection loss reaches-39.3 dB at 2.5 mm,and the absorption bandwidth covers 4.1 GHz at 1.5 mm.In this study,facile processability,resource recycling,appropriately matched impedance,and excellent ma performance are achieved.Finally,the Fe/CGR composites not only enhance the recycling of the CGR but also pioneer a new path for the synthesis of excellent absorbents.

关键词： coal gasification residue recycling utilization composite microwave absorption

A Method to Prepare Nano-sized Copper Particles and Rods on the Surface of Cu Composite Films

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稀有金属材料与工程 2012年第S1期41卷 113-115页

作者： Sun Haoliang Ming, Wei Zhan Jingmei Song Zhongxiao Fei, ma Xu kewei Henan Univ Sci & Technol Sch Mat Sci & Engn Luoyang 471003 Peoples R China Xi An Jiao Tong Univ State Key Lab Mech Behav Mat Xian 710049 Peoples R China

Nano-sized Copper(Cu)particles and rods were prepared by annealing Cu-Zr,and Cu-Al-Zr composite films on polyimide substrates.XRD,FESEM and EDS were used to characterize their microstructure and composition.Results show that faceted Cu particles are regular and pure Cu element.Furthermore,it was interesting to find that Cu nanorods might appear on the surface of annealed Cu-Al-Zr composite thin films.Based on the experimental results and analysis,it were speculated that these Cu particles are single crystals.The particle average sizes are closely related to the content of Zr as well as annealing temperature and atmosphere.This work may provide a new approach to prepare metal particles and nanorods on the surface of Cu composite films on polyimide substrates.

关键词： Cu composite films anneal stress relaxation particles nanorods

Pathogenesis sequences in Gejiu miners with lung cancer： an introduction

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Frontiers of Medicine 2015年第3期9卷 344-349页

作者： Li Bian Yonghua Ruan Liju ma Hairong Hua Li Zhou Xiaoyu Tuo Zheyan Zhou Ting Li Shiyue Liu kewei Jin Department of Pathology The First Afflfiated Hospital of Kunming Medical University Kunming 650032 China Department of Pathology Kunming Medical University Kunming 650031 China Department of Clinical Medicine Research The First Affiliated Hospital of Kunming Medical University Kunming 650032 China Department of Oncology The Seventh People's Hospital of Shanghai Shanghai 200137 China Department of Pathology The Third People's Hospital of Yunnan Province Kunming 650011 China

Tin miners in Gejiu, Yunnan Province, China are at high risk of developing lung cancer with significant occupational characteristics. Tissue samples from these miners presented pathological characteristics, such as fibroplasia in carcinomas, peri-cancerous tissue in lung cancers, and hyperplasia and dysplasia of epithelial cells in peri-cancerous tissue. Carcinomas induced by Yunnan tin mine dust in the animal experiment underwent inflammation, fibroplasia, hyperplasia, dysplasia, and carcinogenesis of epithelial ceils. A correlated and synergistic relationship was observed between bronchial epithelial cell transformation and fibroblast activation in vitro induced by mine dust. Fibroblast hyperplasia and activation are important factors that promote the transformation and carcinogenesis of epithelial cells. Our findings suggested that pulmonary fibrosis may increase the risk and promote the occurrence of lung cancer, which can lead to lun~ fiber hyperplasia.

关键词： Yunnan tin mine miners lung cancer

Fabrication and Properties of Three-dimensional Braided Carbon Fiber Reinforced SiO2-rich Mullite Composites

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Journal of Wuhan University of Technology(materials Science) 2019年第4期34卷 798-803页

作者：张伟马青松 DAI kewei 毛卫国 School of materials Science and Engineering Xiangtan UniversityXiangtan 411105China Science and Technology on Advanced Ceramic Fibers & Composites Laboratory National University of Defense TechnologyChangsha 410073China

In order to enhance the fracture toughness of mullite, three-dimensional braided carbon fiber reinforced mullite(C/mullite) composites were prepared using the Al2O3-SiO2 sol with a high solid content as raw material. Mullitization behavior of the sol was characterized. Then, the microstructure, mechanical properties and oxidation resistance of C/mullite composites were investigated. It is found that the SiO2-rich mullite with desirable sintering shrinkage can be synthesized at 1 300 ℃ from the sol with an Al2O3/SiO2 mass ratio of 1:1. The C/mullite composites with a total porosity of 21.5% were fabricated by repeating 18 cycles of vacuum impregnation-drying-heat treatment, showing a flexural strength of 234.5 MPa and a fracture toughness of 13.1 MPa·m1/2. Since carbon fibers were protected by compact matrix, the C/mullite composites show favorable oxidation resistance during 1 200 ℃-1 600 ℃ even if an open porosity of 10.3% was detected.

关键词： mullite carbon fiber reinforcement sol mechanical properties oxidation resistance

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数据资产核算应用研究:理论与实践

中南财经政法大学学报 2023年第5期 149-160页

作者：马克卫王硕苑杰山西财经大学统计学院山西太原030006

伴随数字经济的飞速发展,数据资产逐渐累积,其概念、估价与分析应用等话题开始被广泛关注。但数据资产核算研究领域依然存在一些问题有待解决。首先,对于数据产权归属并没有进行严格的划分,更多的只是关注于其价值层面,尚未形成完整的... 详细信息

伴随数字经济的飞速发展,数据资产逐渐累积,其概念、估价与分析应用等话题开始被广泛关注。但数据资产核算研究领域依然存在一些问题有待解决。首先,对于数据产权归属并没有进行严格的划分,更多的只是关注于其价值层面,尚未形成完整的产权保护体系。其次,既有研究对数据资产自然增值、外部性、积累效应和多维性特征等本质属性缺乏综合考量,由此引致的测量误差将影响测算结果的准确性。最后,数据资产管理的不成熟以及缺乏良性互动的数据交易生态体系,也会使得数据交易过程中出现道德风险和逆向选择问题。这些问题在后续的研究中有待进一步的拓展与完善。

关键词：数据资产数字经济资产价值生产函数

Application of fluorescence in situ hybridization in the detection of bladder transitional-cell carcinoma: A multi-center clinical study based on Chinese population

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Asian Journal of Urology 2019年第1期6卷 114-121页

作者： Liqun Zhou Kaiwei Yang Xuesong Li Yi Ding Dawei Mu Hanzhong Li Yong Yan Jinyi Li Dongwen Wang Wei Li Yulong Cong Jiangping Gao kewei ma Yajun Xiao Sheng Zhang Hongyi Jiang Weilie Hu Qiang Wei Xunbo Jin Zhichen Guan Qingyong Liu Danfeng Xu Xin Gao Yongguang Jiang Weimin Gan Guang Sun Qing Wang Yanhui Liu Jianquan Hou Liping Xie Xishuang Song Fengshuo Jin Jiafu Feng Ming Cai Zhaozhao Liang Jie Zhang Dingwei Ye Lin Qi Lulin ma Jianzhong Shou Yuping Dai Jianyong Shao Ye Tian Shizhe Hong Tao Xu Chuize Kong Zefeng Kang Yuexin Liu Xun Qu Benkang Shi Shaobin Zheng Yi Lin Shujie Xia Dong Wei Jianbo Wu Weiling Fu Zhiping Wang Jianbo Liang Department of Urology Peking University First HospitalBeijingChina Institute of Urology Peking UniversityBeijingChina National Urological Cancer Center BeijingChina Air Force General Hospital PLABeijingChina Department of Urology Peking Union Medical College HospitalBeijingChina Department of Urology Beijing Chao-Yang HospitalBeijingChina Department of Urology Armed-Police General HospitalBeijingChina Department of Urology Shanxi Medical University First HospitalTaiyuanChina Department of Urology Hebei Medical University Second HospitalShijiazhuangChina Department of Urology The General Hospital of the People’s Liberation ArmyBeijingChina Department of Urology First Affiliated Hospital of Jilin UniversityChangchunChina Department of Urology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina Department of Pathology The First Affiliated Hospital of Fujian Medical UniversityFuzhouChina Department of Urology The Second Xiangya Hospital of Central South UniversityChangshaChina Department of Urology General Hospital of Guangzhou Military Command of PLAGuangzhouChina Department of Urology West China School of MedicineChengduChina Department of Urology Shangdong Province-owned HospitalJinanChina Department of Urology Peking University Shenzhen HospitalShenzhenChina Department of Urology The Central Hospital of Jinan CityJinanChina Department of Urology Shanghai Changzheng HospitalShanghaiChina Department of Urology The Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhouChina Department of Urology Beijing Anzhen Hospital of Capital Medical UniversityBeijingChina Department of Urology The Second Affiliated Hospital of Xi’an Jiaotong UniversityXi’anChina Department of Urology The Second Hospital of Tianjin Medical UniversityTianjinChina Department of Urology People’s Hospital of Xinjiang Uygur Autonomous RegionWulumuqiChina Department of Urology Guangdong General HospitalGuangzhouChina Department of Urology The First Affil

Objective:To evaluate the diagnostic value of fluorescence in situ hybridization(FISH)in bladder cancer.Methods:We enrolled healthy volunteers and patients who were clinically suspected to have bladder cancer and conducted FISH tests and cytology examinations from August 2007 to December 2008.Receiver operating characteristic(ROC)curve analysis was performed and the area under curve(AUC)values were calculated for both the FISH and urine cytology tests.Results:A cohort of 988 healthy volunteers was enrolled to establish a reference range for the normal population.A total of 4807 patients with hematuria were prospectively,randomly enrolled for the simultaneous analysis of urine cytology,FISH testing,and a final diagnosis as determined by the pathologic findings of a biopsy or a surgically-excised specimen.Overall,the sensitivity of FISH in detecting transitional-cell carcinoma was 82.7%,while that of cytology was 33.4%(pma were 81.7%and 89.6%,respectively(p=0.004).The sensitivity values of FISH for low and high grade bladder cancer were 82.6%and 90.1%,respectively(p=0.002).Conclusion:FISH is significantly more sensitive than voided urine cytology for detecting bladder cancer in patients evaluated for gross hematuria at all cancer grades and stages.Higher sensitivity using FISH was obtained in high grade and muscle invasive tumors.

关键词： Bladder transitionalcell carcinoma Fluorescence in situ hybridization Detection Grade Stage

闪烧合成高熵氧化物陶瓷(MgCoNiCuZn)O的性能

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无机材料学报 2022年第12期37卷 1289-1294页

作者：李汪国刘佃光王珂玮马百胜刘金铃西南交通大学材料科学与工程学院成都610031 东莞理工学院机械工程学院东莞523808 西南交通大学力学与航空航天学院成都610031

闪烧技术是一种温度场与电场耦合的烧结技术,具有低温快速传质的特性,在高熵陶瓷的合成上具有显著的优势。本研究通过闪烧法合成了相对致密的高熵氧化物陶瓷(MgCoNiCuZn)O,并与传统烧结试样的性能进行了对比。在室温,电场强度为50 V/cm... 详细信息

闪烧技术是一种温度场与电场耦合的烧结技术,具有低温快速传质的特性,在高熵陶瓷的合成上具有显著的优势。本研究通过闪烧法合成了相对致密的高熵氧化物陶瓷(MgCoNiCuZn)O,并与传统烧结试样的性能进行了对比。在室温,电场强度为50 V/cm,电流密度为300 ma/mm^(2)条件下闪烧,物相转变的时间仅为10 s。闪烧试样最高相对密度为94%,比传统烧结试样最高密度提高了22.8%。闪烧试样的最高硬度5.05GPa,比传统烧结试样高3.95 GPa。当频率<2Hz时,闪烧试样的介电常数比传统烧结试样高一个数量级。闪烧试样性能的提高,一方面与临界电场加速传质,提高材料致密度有关;另一方面与临界电场引入额外的缺陷有关。

关键词：高熵氧化物闪烧相变介电常数