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纤维素纳米纤维的疏水改性及其在纸张中的应用

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中国造纸 2024年第7期43卷 160-167页

作者：周嘉铖邹小峰杨祥建陈天影唐艳军浙江理工大学纺织科学与工程学院制浆造纸研究所浙江杭州310018 浙江华丰纸业集团有限公司浙江安吉313309

本研究基于水相一锅两步法对纤维素纳米纤丝(CNFs)进行疏水改性,重点研究了没食子酸(GA)、没食子酸甲酯(MG)、没食子酸乙酯(EG)、没食子酸丙酯(PG)及原儿茶酸(PCA)5种植物多酚对CNFs疏水改性的影响,并对疏水改性CNFs在纸张涂布中的应用... 详细信息

本研究基于水相一锅两步法对纤维素纳米纤丝(CNFs)进行疏水改性,重点研究了没食子酸(GA)、没食子酸甲酯(MG)、没食子酸乙酯(EG)、没食子酸丙酯(PG)及原儿茶酸(PCA)5种植物多酚对CNFs疏水改性的影响,并对疏水改性CNFs在纸张涂布中的应用进行了探究。结果表明,植物多酚(GA、MG、EG、PG及PCA)均能协同十八胺(ODA)对CNFs进行疏水改性;且CNFs的疏水改性作用效果随植物多酚结构中碳链的延长而增强。疏水改性CNFs能够赋予纸张较好疏水性,PCA改性CNFs涂布纸的疏水性强于GA改性CNFs涂布纸的疏水性;PG改性CNFs涂布纸的水接触角较ODA涂布纸的水接触角提高了43%,且疏水改性CNFs涂布纸在干、湿状态下均能保持较好的抗张强度。

关键词：纤维素纳米纤丝植物多酚表面改性疏水

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联合预处理提取半纤维素的研究进展

中国造纸学报 2024年第1期39卷 137-145页

作者：唐德容陈天影李勉杨武龙唐艳军浙江理工大学纺织科学与工程学院制浆造纸研究所浙江杭州310018 浙江华康药业股份有限公司浙江衢州324302

半纤维素含量丰富,应用前景广阔。但半纤维素结构复杂多样,实现其高值化利用是一个长期存在的挑战。采用单一物理法、化学法或生物法预处理提取半纤维素时,在能耗、成本、效果等方面均存在一定局限性。联合预处理可结合各种预处理方法... 详细信息

半纤维素含量丰富,应用前景广阔。但半纤维素结构复杂多样,实现其高值化利用是一个长期存在的挑战。采用单一物理法、化学法或生物法预处理提取半纤维素时,在能耗、成本、效果等方面均存在一定局限性。联合预处理可结合各种预处理方法的优势,降低单一预处理的局限性,已成为目前半纤维素提取的研究热点。本文综述了木质纤维中半纤维素的联合预处理提取工艺,如超声辅助、微波辅助、酸/水热处理和碱/水热处理等,并简要介绍了各种预处理方法的优缺点,以期为半纤维素的提取及应用提供理论指导。

关键词：联合预处理半纤维素提取高值化利用

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新疆叶城沙蜥生境适宜性评价及生境廊道模型构建

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野生动物学报 2024年第2期45卷 354-366页

作者：蒋罗雪李政余陈天莹段嘉宝赵伟祁玥陈伟基李铀西北民族大学生命科学与工程学院兰州730030 兰州大学生命科学学院甘肃省环境生物监测与修复重点实验室兰州730000 西北民族大学生物医学研究中心甘肃省动物细胞技术创新中心兰州730030

保护或创造破碎化生境中的景观连通性被认为是保护生物多样性、生态系统以及促进野生动植物种群的流动和适应气候变化的关键战略,而生境廊道是恢复和保护景观连通性的常用策略。以塔里木盆地为例,结合该区域内叶城沙蜥(Phrynocephalus a... 详细信息

保护或创造破碎化生境中的景观连通性被认为是保护生物多样性、生态系统以及促进野生动植物种群的流动和适应气候变化的关键战略,而生境廊道是恢复和保护景观连通性的常用策略。以塔里木盆地为例,结合该区域内叶城沙蜥(Phrynocephalus axillaris)21个栖息地分布点数据,运用MaxEnt模型对该区域叶城沙蜥的生境适宜性进行分析,并综合植被类型、地理因素、人为干扰等因素,利用Linkage Mapper工具构建适宜叶城沙蜥扩散的潜在生境廊道。结果表明:对叶城沙蜥潜在适宜分布区影响较大的环境因子包括最冷季度平均气温、最冷月份最低气温、植被覆盖类型、最冷季度降水量、坡度及最干月份降水量。在所记录到的21个叶城沙蜥分布点中,6个属于最佳栖息地,6个属于适宜栖息地,另外9个属低适宜栖息地。以MaxEnt模型分析的叶城沙蜥适宜区分布情况为基础,共构建32条生境廊道,包括11条长距离廊道和21条短距离廊道。其中短距离廊道连通邻近栖息地,长距离廊道连通南北栖息地。研究结果有助于优化叶城沙蜥栖息地格局,同时为塔里木盆地区域周边及部分吐鲁番盆地爬行类物种持续发展提供科学参考,并为荒漠生态系统的物种保护与保护区规划提供借鉴思路。

关键词：叶城沙蜥 Linkage Mapper MaxEnt模型生境廊道塔里木盆地

Recent progress in research and application of engineered implanted cells for biomedical applications

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Quantitative Biology 2021年第3期9卷 267-291页

作者： tianying chen Xue Zhang Qiong Wu MOE Key Laboratory of Bioinformatics School of Life SciencesTsinghua UniversityBeijing 100084China Center for Synthetic and Systems Biology Tsinghua UniversityBeijing 100084China

Background:The core concept of cell engineering is the use of synthetic biological methods to engineer and design genetically modified cells with specific functions,which has revolutionized the biotechnology industry and cell *** cells play an important role in the cell therapy,but the currently used implanted cells are unable to fully meet the needs of researchers and ***,the construction of engineered implanted cells has become a new research area,with many groups exploring the working principles of implanted cells,allowing them to better exert their repair ***:Based on the existing cell engineering platforms,this paper summarizes the main types of chassis cells used in implanted cell engineering,progress in the development of gene editing tools and delivery systems,as well as strategies for the construction of engineered implanted ***:The rational use of synthetic biology methods to program and control the function of implanted cells with high spatiotemporal accuracy provides new ideas for the development of cell therapy,and opens up new possibilities for exploring the mechanism of implanted cell action to allow them to better exert their role in promoting the progress of repair.

关键词： chassis cells cell therapy engineered implanted cells synthetic biology

Surface Modification of Bamboo-based Activated Carbon for Methylene Blue Removal

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Paper And Biomaterials 2023年第1期8卷 12-25页

作者： Derong Tang Ruonan Zhao Feiyun Li tianying chen Yanjun Tang Pulp and Papermaking Center Zhejiang Sci-Tech UniversityHangzhouZhejiang Province310018China Key Laboratory of Intelligent Textile and Flexible Interconnection of Zhejiang Province Zhejiang Sci-Tech UniversityHangzhouZhejiang Province310018China

The feasibility of biomass-based activated carbon has received tremendous attention owing to its excellent properties,such as insensitivity,good adsorption performance,and potential to reduce the strong dependence on non-reproducible *** this study,bamboo-based activated carbon(BAC)was used as the raw material for methylene blue(MB)*** bromide(CTAB),sodium dodecyl sulfate(SDS),and sodium dodecylbenzene sulfonate(SDBS)were used as BAC surface *** morphologies and structures of the samples were *** addition,the effects of the surfactant type and concentration on the adsorption-based removal of MB from aqueous solutions by the modified BAC were systematically *** the 0.2 g/L MB solution,the MB removal rate reached 99.7%when the concentration of CTAB was 0.25 g/***,the kinetic model curve of 0.25 g/L CTAB-modified BAC(CAC)was consistent with the Freundlich isotherm *** research work enriches the technical pathway of modification and application of activated carbon,which is not only beneficial for realizing the high-value utilization of biomass bamboo resources but also can play an active role in guiding the treatment of MB-containing wastewater.

关键词： bamboo-based activated carbon surfactant methylene blue adsorption performance

Improved Removal Efficiency of Submicron Inclusions in Non-oriented Silicon Steel during RH Process

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Journal of Wuhan University of Technology(Materials Science) 2020年第6期35卷 1122-1127页

作者： chen tianying JIN Yan chenG Zhaoyang YUAN Zexi BI Yunjie LIU Jing The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081China

To improve the removal efficiency of such submicron inclusions,we designed an argon blowing method for an RH facility based on mathematical *** effect of the argon blowing on the liquid steel flow and the movement of submicron inclusions was studied using the k-ε flow model coupled with the DPM model for inclusion movement based on fluid computational dynamics in *** was found that a more uniform argon flow can be achieved in the up-leg snorkel with a new nozzle position and inner diameter,which resulted in a favorable up-lifting and mixing *** new design also increased the circulation rate of molten steel in the RH *** increased turbulent kinetic energy and turbulent dispersing rate enhanced the collision probability of submicron inclusions,which results in an improved removal for 0.5-1 μm *** proposed RH facility could increase the removal rate of submicron inclusions from the original 57.1% to 66.4%,which improves the magnetic properties of non-oriented silicon steel.

关键词： RH treatment argon blowing method model optimization submicron inclusions numerical simulation

基于分布式不平衡配电网双方向整定的自适应过流保护方案研究

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电子器件 2024年第2期47卷 425-429页

作者：陈天英臧谦赵宇皓李铁成郭少飞张卫明国网河北省电力有限公司电力科学研究院河北石家庄050021

随着传统化石能源的大量消耗与环境问题的日益严重,分布式发电(DG)技术快速发展,DG接入配电网也产生了新问题。由于重合器-熔断器的不协调,可能会降低网络可靠性。为了防止这种可靠性的降低,提出一种保护协调策略,展开理论分析,得出重... 详细信息

随着传统化石能源的大量消耗与环境问题的日益严重,分布式发电(DG)技术快速发展,DG接入配电网也产生了新问题。由于重合器-熔断器的不协调,可能会降低网络可靠性。为了防止这种可靠性的降低,提出一种保护协调策略,展开理论分析,得出重合器快速和慢速操作修正设置以及熔断器系数的取值,以实现尽量少地使用熔断器的情况下满足保护目的,增加保护装置的协调范围。在IEEE 13个节点测试系统上模拟出现故障情况时应用该策略,重合器和熔断器能够配合处理故障,验证了策略的有效性。

关键词：分布式配电网新型电力系统过流整定保护重合器-熔断器协调

Preparation and Characterization of Co_(3)O_(4)/Graphene/Cellulose Nanofiber Composite Films

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Paper And Biomaterials 2022年第2期7卷 27-36页

作者： Zejun Ding tianying chen Yiming Zhou Peng Zhu Feiyun Li Yanjun Tang Pulp and Papermaking Center Zhejiang Sci-Tech UniversityHangzhouZhejiang Province310018China Key Laboratory of Intelligent Textile and Flexible Interconnection of Zhejiang Province Zhejiang Sci-Tech UniversityHangzhouZhejiang Province310018China

Nanocellulose has served as an eye-catching nanomaterial for constructing advanced functional devices with renewability,light weight,flexibility,and environmental *** this study,Co_(3)O_(4)/graphene/cellulose nanofiber(CNF)flexible composite films,in which the CNF acted as a spacer for the graphene,were prepared via a facile and scalable vacuum filtration *** effects of the CNF on the microstructure,hydrophilicity,thermal stability,tensile strength,surface resistance,and electrochemical performance of the Co_(3)O_(4)/graphene/CNF composite films were systematically *** results showed that the synergistic interaction of the CNF and graphene substantially improved the overall properties of the Co_(3)O_(4)/graphene/CNF composite films,particularly their hydrophilicity and tensile ***,Co_(3)O_(4)/graphene/CNF composite films with a CNF content of 4%appeared to have the optimal electrochemical performance,with an area specific capacitance of 56 mF/cm^(2) and prominent capacitance retention of 95.6%at a current density of 1 A/g after 1000 *** work demonstrated that the prepared Co_(3)O_(4)/graphene/CNF flexible composite films have great application potential in the field of flexible energy storage devices.

关键词： cellulose nanofiber graphene Co_(3)O_(4) supercapacitor composite films

Knockdown of HE4 suppresses tumor growth and invasiveness in lung adenocarcinoma through regulation of EGFR signaling

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Oncology Research 2024年第6期32卷 1119-1128页

作者： YUE ZHANG WENYU YANG XIAOWANG HAN YUE QIAO HAITAO WANG TING chen tianying LI WEN-BIN OU Department of Biopharmaceutics College of Life Sciences and MedicineZhejiang Provincial Key Laboratory of Silkworm Bioreactor and BiomedicineZhejiang Sci-Tech UniversityHangzhou310018China Department of Thoracic Surgery Zhejiang Provincial People’s HospitalHangzhou310014China

It has been shown that the high expression of human epididymis protein 4(HE4)in most lung cancers is related to the poor prognosis of patients,but the mechanism of pathological transformation of HE4 in lung cancer is still *** current study is expected to clarify the function and mechanism of HE4 in the occurrence and metastasis of lung adenocarcinoma(LUAD).Immunoblotting evaluated HE4 expression in lung cancer cell lines and biopsies,and through analysis of The Cancer Genome Atlas(TCGA)*** HE4 overexpression was demonstrated in LUAD,but not in lung squamous cell carcinoma(LUSC),indicating that HE4 can serve as a biomarker to distinguish between LUAD and ***4 knockdown significantly inhibited cell growth,colony formation,wound healing,and invasion,and blocked the G1-phase of the cell cycle in LUAD cell lines through inactivation of the EGFR signaling downstream including PI3K/AKT/mTOR and RAF/MAPK *** first-line EGFR inhibitor gefitinib and HE4 shRNA had no synergistic inhibitory effect on the growth of lung adenocarcinoma cells,while the third-line EGFR inhibitor osimertinib showed additive anti-proliferative ***,we provided evidence that HE4 regulated EGFR expression by transcription regulation and protein interaction in *** findings suggest that HE4 positively modulates the EGFR signaling pathway to promote growth and invasiveness in LUAD and highlight that targeting HE4 could be a novel strategy for LUAD treatment.

关键词： Lung adenocarcinoma Human epididymis protein 4 Epidermal growth factor receptor Biomarker Targeted therapies