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农田水利工程中节水灌溉技术的运用探究

农业灾害研究 2023年第5期13卷 164-166页

作者：孔庆峰甘肃省武威市天祝县水务局松山水管所甘肃天祝733200

水资源是农业发展的重要资源。在社会进步与经济发展的双重推动下,人们生活和生产对水资源的需求量都在不断增加,直接造成我国的水资源紧缺。在此背景下,大力建设农田水利工程,将节水灌溉技术应用于农业生产成为大势所趋。主要针对具体... 详细信息

水资源是农业发展的重要资源。在社会进步与经济发展的双重推动下,人们生活和生产对水资源的需求量都在不断增加,直接造成我国的水资源紧缺。在此背景下,大力建设农田水利工程,将节水灌溉技术应用于农业生产成为大势所趋。主要针对具体的节水灌溉技术方式进行了详细概述,同时阐述了其在农田灌溉中运用的意义,并提出了目前在运用节水灌溉技术时所存在的问题,针对这些问题进行了分析,提出了相关改善措施,以供参考。

关键词：农田水利工程节水灌溉技术运用探究

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发动机复合材料叶片包边用胶粘剂的研制

化学与粘合 2024年第4期46卷 328-329,344页

作者：李岳孙东洲于国良孔宪志吕虎孙禹黑龙江省科学院石油化学研究院黑龙江哈尔滨150040

介绍了一种发动机复合材料叶片包边用胶粘剂。在胶粘剂中加入附着力改性剂,提高了胶粘剂对钛合金、镍等材料的粘接强度。研制的胶粘剂在23℃、80℃、100℃的剪切强度分别为29.34 MPa、19.82 MPa、13.04 MPa,90°剥离强度分别为5.93 N/mm... 详细信息

介绍了一种发动机复合材料叶片包边用胶粘剂。在胶粘剂中加入附着力改性剂,提高了胶粘剂对钛合金、镍等材料的粘接强度。研制的胶粘剂在23℃、80℃、100℃的剪切强度分别为29.34 MPa、19.82 MPa、13.04 MPa,90°剥离强度分别为5.93 N/mm、4.17 N/mm、3.52 N/mm,可用于发动机复合材料叶片金属包边的粘接。

关键词：丙烯酸酯胶粘剂复合材料发动机叶片

Integration of bio-inspired lanthanide-transition metal cluster and P-doped carbon nitride for efficient photocatalytic overall water splitting

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National Science Review 2021年第9期8卷 41-49页

作者： Rong Chen Gui-Lin Zhuang Zhi-Ye Wang Yi-Jing Gao Zhe Li Cheng Wang Yang Zhou Ming-Hao Du Suyuan Zeng La-Sheng Long Xiang-Jian kong lan-Sun Zheng Collaborative Innovation Center of Chemistry for Energy Materials State Key Laboratory of Physical Chemistry of Solid Surface and Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University College of Chemical Engineering Zhejiang University of Technology College of Chemistry and Chemical Engineering Liaocheng University

Photosynthesis in nature uses the Mn4CaO5cluster as the oxygen-evolving center to catalyze the water oxidation efficiently in photosystem II. Herein, we demonstrate bio-inspired heterometallic Ln Co3(Ln=Nd, Eu and Ce) clusters, which can be viewed as synthetic analogs of the Ca *** Ln Co3on phosphorus-doped graphitic carbon nitrides (PCN) shows efficient overall water splitting without any sacrificial reagents. The Nd Co3/PCN-c photocatalyst exhibits excellent water splitting activity and a quantum efficiency of 2.0%at 350 nm. Ultrafast transient absorption spectroscopy revealed the transfer of a photoexcited electron and hole into the PCN and Ln Co3for hydrogen and oxygen evolution reactions, respectively. A density functional theory (DFT) calculation showed the cooperative water activation on lanthanide and O-O bond formation on transition metal for water oxidation. This work not only prepares a synthetic model of a bio-inspired oxygen-evolving center but also provides an effective strategy to realize light-driven overall water splitting.

关键词： bio-inspired lanthanide-transition metal cluster photocatalytic overall water splitting synergistic effects oxygen-evolving center

CGPS:A machine learning-based approach integrating multiple gene set analysis tools for better prioritization of biologically relevant pathways

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Journal of Genetics and Genomics 2018年第9期45卷 489-504页

作者： Chen Ai Lei kong Center for Bioinformatics State Key Laboratory of Protein and Plant Gene ResearchSchool of Life SciencesPeking University

Gene set enrichment（GSE） analyses play an important role in the interpretation of large-scale transcriptome datasets. Multiple GSE tools can be integrated into a single method as obtaining optimal results is challenging due to the plethora of GSE tools and their discrepant performances. Several existing ensemble methods lead to different scores in sorting pathways as integrated results; furthermore, it is difficult for users to choose a single ensemble score to obtain optimal final results. Here, we develop an ensemble method using a machine learning approach called Combined Gene set analysis incorporating Prioritization and Sensitivity（CGPS） that integrates the results provided by nine prominent GSE tools into a single ensemble score（R score） to sort pathways as integrated results. Moreover, to the best of our knowledge, CGPS is the first GSE ensemble method built based on a priori knowledge of pathways and phenotypes. Compared with 10 widely used individual methods and five types of ensemble scores from two ensemble methods, we demonstrate that sorting pathways based on the R score can better prioritize relevant pathways, as established by an evaluation of 120 simulated datasets and 45 real ***, CGPS is applied to expression data involving the drug panobinostat, which is an anticancer treatment against multiple myeloma. The results identify cell processes associated with cancer, such as the p53 signaling pathway（hsa04115）; by contrast, according to two ensemble methods（EnrichmentBrowser and EGSEA）, this pathway has a rank higher than 20, which may cause users to miss the pathway in their analyses. We show that this method, which is based on a priori knowledge, can capture valuable biological information from numerous types of gene set collections, such as KEGG pathways, GO terms, Reactome, and BioCarta. CGPS is publicly available as a standalone source code at ftp：//***/pub/CGPS_download/***.

关键词： Gene expression Differential expression Gene set enrichment Support vector machine

An Electrocatalytic Strategy for Dehydrogenative[4+2]Cycloaddition over a Cobalt-Based Catalyst

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Chinese Journal of Chemistry 2022年第23期40卷 2741-2746页

作者： Xiaomeng Xue Ye Wang Lina Zhou Ruixiang Ge Jiangrong Yang Xianggui kong Ming Xu Zhenhua Li Lina Ma Haohong Duan State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing 100029China Department of Chemistry Tsinghua UniversityBeijing 100084China State Key Laboratory of Catalytic Materials and Reaction Engineering Research Institute of Petroleum ProcessingSiNOPECBeijing 100083China

Exploring the anodic reaction to substitute conventional oxygen evolution reaction(OER)for the synthesis of complex pharmaceutical molecules is highly ***,we report an electrocatalytic strategy for dehydrogenative[4+2]cycloaddition of N,N-dialkylanilines with maleimides via dual functionalization of both C(sp3)-H and C(sp2)-H bonds,by using an electrochemically activated cobalt carbonate hydroxide hydrate supported on carbon cloth(CCHH-A/CC),affording various tetrahydroquinolines with high *** electrochemical transformation proceeds with high activity and stability,as well as good substrate *** study shows thatα-aminoalkyl radical exists in the electrooxidation *** strategy shows significant potential for the synthesis of valuable chemicals by using an electrocatalytic strategy.

关键词： Cycloaddition C-H activation Dehydrogenation Eletrooxidation reactions Cobalt-based catalyst

Undescribed Meroterpenoids from Hypericum japonicum with Neuroprotective Effects on H_(2)O_(2) Insult SH-SY5Y Cells Targeting Keap1-Nrf2

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Chinese Journal of Chemistry 2022年第11期40卷 1321-1330页

作者： Linzhen Hu Zhenzhen Wang Zhou Tong Ping Hu Luqi kong Mengying Luo Xiao-Nian Li Yuexing Zhang Zhiyong Huang Yonghui zhang State Key Laboratory of Biocatalysis and Enzyme Engineering National&Local Joint Engineering Research Centre of High-throughput Drug Screening TechnologyHubei Key Laboratory of Biotechnology of Traditional Chinese MedicineSchool of Life SciencesHubei UniversityWuhanHubei 430062China School of Pharmacy Tongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei 430030China Kunming Institute of Botany Chinese Academy of SciencesKunmingYunnan 650204China College of Chemistry and Chemical Engineering Hubei UniversityWuhanHubei 430062China Tianjin Institute of Industrial Biotechnology Chinese Academy of Sciences.Tianjin 300308China

Unreported tautomeric/enantiomeric meroterpenoids,(±)-hyperjaponols I—K(1-3),were discovered from Hypericum *** chemical investigations established the absolute characteristics of these *** TS calculation demon-strated that 1a and 2a easily occur enol-keto tautomerism with steady configurations *** isolates,1b showed the strongest neuroprotective activity with the concentration at 25μmol/L on H_(2)O_(2) insult SH-SY5Y *** vitro molecular biological ex-periments manifested that 1b activated the Keap1-Nrf2-ARE pathway,leading to the promotion of Nrf2 nuclear translocation,down-regulation of the expression level of Keap1,and upregulation of the levels of Nrf2,NQO-1,and *** results of in silico simulation showed that 1b possessed good binding features with Keap1(5FNQ)via forming multiple typical hydrogen and hydrophobic bonds as well as less fluctuation of RMSD and RMSF during a natural physiological condition.

关键词： Hypericum japonicum Natural products Tautomerism Neuroprotective activity Keap1-Nrf2-ARE pathway

科教融合下广东省创新型公共卫生人才培养现状

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基础医学教育 2024年第5期26卷 425-429页

作者：孔露诗陈朵张锦丹成晓芬胡光丽李贝南方医科大学卫生管理学院卫生管理学系广州510515 南方医科大学研究生学院

科教融合是高校新的历史使命,指导高校培养高素质人才。文章以广东省医科院校全日制公共卫生专业硕士研究生为研究对象,对广东省公共卫生专业科教融合实施情况展开问卷调查。调查结果表明,公共卫生专业科教融合人才培养中存在实践能力... 详细信息

科教融合是高校新的历史使命,指导高校培养高素质人才。文章以广东省医科院校全日制公共卫生专业硕士研究生为研究对象,对广东省公共卫生专业科教融合实施情况展开问卷调查。调查结果表明,公共卫生专业科教融合人才培养中存在实践能力培养不足、师资队伍素质不高、科研资源分配不均、激励机制不健全的问题。文章从构建课程体系、构建师资团队、完善激励制度三个方面提出建议,为促进科教融合提供理论依据。

关键词：公共卫生科教融合教学改革人才培养创新型人才

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废旧棉纺织品再生浆绿色制备及性质研究

中华纸业 2024年第7期45卷 79-82页

作者：陈云玲陈若愚刘克印周哲孔凡功齐鲁工业大学生物基材料与绿色造纸国家重点实验室济南250353 东华大学材料科学与工程学院上海201620

随着纺织品的生产和消费量日益增加,每年产生数千万吨废旧纺织品。现有废旧纺织品回收技术主要以物理方法为主,再生利用少,产品品质低,亟需发展新型废旧纺织品再生利用方法。本文探讨了以废旧棉纺织品为原料制备再生棉浆纤维的新方法,... 详细信息

随着纺织品的生产和消费量日益增加,每年产生数千万吨废旧纺织品。现有废旧纺织品回收技术主要以物理方法为主,再生利用少,产品品质低,亟需发展新型废旧纺织品再生利用方法。本文探讨了以废旧棉纺织品为原料制备再生棉浆纤维的新方法,通过改变再生浆制备工艺实现对再生浆的聚合度、白度等特性高效调控。通过蒸煮制浆等流程,实现对废旧棉纺织品的高效利用及再生浆制备,为缓解原生浆制备过程中的原料短缺等问题提供了新思路。在造纸、纺织、功能纤维制备等领域有广泛应用前景。

关键词：废旧棉纺织品蒸煮制浆再生浆造纸

PEG-6000模拟干旱胁迫对毛叶柿种子萌发及生长量的影响

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林业科技通讯 2024年第2期 27-31页

作者：罗孔张春华王猛阮长明欧朝蓉王储孙永玉西南林业大学林学院昆明650233 中国林业科学研究院高原林业研究所昆明650233 云南元谋干热河谷生态系统国家定位观测研究站昆明650233

为了解干旱胁迫下毛叶柿(Diospyros dumetorum)种子萌发情况,探究干旱对毛叶柿种子萌发期生长量的影响。以毛叶柿种子为材料,用PEG-6000溶液(0、5%、10%、15%、20%、25%)处理种子以此来模拟不同程度的干旱胁迫。结果表明:1)轻度干旱(5%~... 详细信息

为了解干旱胁迫下毛叶柿(Diospyros dumetorum)种子萌发情况,探究干旱对毛叶柿种子萌发期生长量的影响。以毛叶柿种子为材料,用PEG-6000溶液(0、5%、10%、15%、20%、25%)处理种子以此来模拟不同程度的干旱胁迫。结果表明:1)轻度干旱(5%~10%PEG)能促进种子相对发芽率和相对发芽势的增长,超过10%PEG浓度,种子萌发指标与对照组相比均受到不同程度的抑制。2)随着PEG浓度的增加,幼苗生长指标均值有所下降,与对照组(0PEG)相比,轻中度干旱(PEG0~10%)的胚根长和胚芽长有所增加,胚根长对干旱胁迫的响应更敏感。3)随着PEG浓度的增加,种子受胁迫程度越高,种子地下生长量呈现增加趋势,PEG浓度与根干质量和鲜质量呈极显著相关(P<0.01)。结论:干旱胁迫下毛叶柿种子通过降低相对萌发率、增加胚根鲜质量、干质量和根冠比的生长适应干旱胁迫。

关键词：毛叶柿 Diospyros dumetorum PEG胁迫种子萌发