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China Coal 1997年第S1期 38-39页

作者： chen qingru and yang yufen(China University of Mining & Technology)

The implications of planting mode on cadmium uptake and remobilization in rice: Field experiments across growth stages

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Frontiers of Environmental Science & Engineering 2021年第6期15卷 457-469页

作者： Xiao Deng Yixuan chen yang yang Liang Peng Luo Si qingru Zeng College of Resources and Environment Hunan Agricultural UniversityChangsha 410128China

Global rice production practices have gradually changed from a reliance on transplanting to direct *** how this shift may alter cadmium(Cd)accumulation in rice is poorly *** we conducted field experiments with two rice genotypes cultivars that were planted using three methods:via direct seeding(DS),seedling throwing(ST),and manual transplanting(MT).Rice samples were collected during four growth *** formation and distribution of iron plaque were analyzed using DCB(dithionite-citrate-bicarbonate)extractions and observed under micro-XRF(micro X-ray fluorescence).The results revealed that,in each growth stage,DS rice was more apt to harbor Cd distributed in the plant’s aerial parts,and the Cd concentration of brown rice from DS was 21.8%–43.3%significantly higher than those from ST and MT at maturity stage(p<0.05).During the vegetative stages,the Cd uptake percentage was higher in DS than MT rice,and those plants arising from the DS method were capable of absorbing more Cd earlier in their growth and ***,using DS decreased the amount of iron plaque covering the root surface in every growth stage,especially in the critical period of Cd accumulation,such that the roots’middle areas were distinguished by a near-complete absence of iron plaque,thus weakening its role as an effective barrier to Cd uptake from ***,this study demonstrated that implementing the DS mode of planting will increase Cd’s distribution in the aboveground parts of rice,and heightening the risk of Cd contamination in grain.

关键词： Cadmium Genotypes Growth stages Micro X-ray fluorescence Planting mode

Appraisal of an oligomerization behavior of unprotected carbohydrates induced by phosphorus reagent

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Science China Chemistry 2018年第2期61卷 243-250页

作者： Hang Yuan Xu yang Peng chen Yan Liu Guo Tang yufen Zhao Department of Chemical Biology College of Chemistry and Chemical Engineering Key Laboratory for Chemical Biology of Fujian ProvinceXiamen University Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology Ministry of Education Department of Chemistry Tsinghua University

In this article, a novel oligomerization behavior of unprotected monosaccharides was discovered in a one-pot reaction induced by phosphorus reagent at room temperature. The inherent characteristics of the oligomerization reaction were dissected in detail by mass spectrometry based method combined with NMR technology. It was found that the main glycosidic bonding pattern is (1→6) linkage with 66% regioselectivity for each step. The ratio of α-(1→6) and β-(1→6) glycosidic bonds formed is around 1:1. The reactivity of 1-OH group from aldoses and the driving force from penta-coordinated phosphorus intermediates are the two critical factors for the oligomerization, according to the monitoring experiments by ESI-MS and NMR. Besides, the oligomerization reaction has good compatibility for various aldoses and could expand to O-glycosylated modification of peptides in vitro. The above results will provide a novel enlightenment to develop more convenient and higher-efficient methods for the synthesis of oligosaccharide library.

关键词： organic phosphorus activation oligosaccharide oligomerization one-pot unprotected synthesis

Simultaneous elution of polycyclic aromatic hydrocarbons and heavy metals from contaminated soil by two amino acids derived from β-cyclodextrins

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Journal of Environmental Sciences 2010年第12期22卷 1910-1915页

作者： chengjian yang qingru Zeng Yunzhong Wang Bohan Liao Jian Sun Hui Shi Xingdou chen School of Environment & Municipal Engineering Xi'an Architecture Science Technology University Xi'an 710055 China. Department of Environmental Science Hunan Agricultural University Changsha 410128 China Ministry of Education Key Laboratory of Pollution Control and Ecological Remediation for Industrial Agglomeration Area Department of Environmental Science and Engineering South China University of Technology Guangzhou 510006 China

Two highly water-soluble amino acids, which derived from β-CDs, i.e., glutamic acid-β-cyclodextrin （GluCD） and ethylene-diamine- β-cyclodextrin （EDCD）, were synthesized and were examined for their effect on solubilization of anthracene （ANT）, complexation of cadmium （Cd^2＋）, and elution removal of ANT and Cd^2＋ in soil. The results showed that GluCD and EDCD were powerful complexant for ANT and Cd^2＋. In the presence of 10 g/L GIuCD and EDCD, the solubilization of ANT increased by 47.04 and 23.85 times compared to the control, respectively. GluCD resulted in approximately 90% complexation of Cd^2＋ while 70% complexation was observed for EDCD. Simultaneously, GluCD and EDCD could greatly enhance the elution removal of ANT and Cd^2＋ from soil. GluCD resulted in the highest elution efficiency of ANT and Cd^2＋. With the addition of 10 g/L GluCD, 53.5% of ANT and 85.6% of Cd^2＋ were eluted, respectively. The ANT had a negligible effect on the Cd^2＋ removal due to different complexing sites of ANT and Cd^2＋, while Cd^2＋ enhanced the ANT removal under the addition of GluCD because Cd^2＋ neutralized the -COOH group of GIuCD. Adversely, the removal of ANT was decreased with Cd^2＋ under the addition of EDCD, this was due to the fact that Cd^2＋ enhanced the polarity of EDCD molecule and inhibited the complexation between ANT and EDCD. The study suggested that GluCD could be preferred and be successfully applied to remediation of heavy metals or organic compounds in contaminated soil.

关键词： anthracene cadmium cyclodextrin solubilization elution soil

Effect of high hydrostatic pressure on prebiotic peptide synthesis

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Chinese Chemical Letters 2019年第2期30卷 367-370页

作者： Jianxi Ying Peng chen Yile Wu Xu yang Kaili Yan Pengxiang Xu yufen Zhao Department of Chemistry and Key Laboratory for Chemical Biology of Fujian Province College of Chemistry and Chemical EngineeringXiamen University Institute of Drug Discovery Technology Ningbo University Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education) Department of ChemistryTsinghua University

Prebiotic peptide synthesis is a central issue concerning life's origins. Many studies considered that life might come from Hadean deep-sea environment, that is, under high hydrostatic pressure ***, the properties of prebiotic peptide formation under high hydrostatic pressure conditions have seldom been mentioned. Here we report that the yields of dipeptides increase with raised ***, effect of pressure on the formation of dipeptide was obvious at relatively low *** that the deep sea is of high hydrostatic pressure, the pressure may serve as one of the key factors in prebiotic peptide synthesis in the Hadean deep-sea environment. The high hydrostatic pressure should be considered as one of the significant factors in studying the origin of life.

关键词： High hydrostatic pressure Sodium trimetaphosphate Prebiotic peptide synthesis Prebiotic chemistry Origin of life

Phylogenetic diversity of TypeⅠpolyketide synthase genes from sediments of Ardley Island in Antarctica

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Acta Oceanologica Sinica 2011年第6期30卷 104-111页

作者： ZHAO Jing yang Ning chen Xinglin JIANG qingru ZENG Runying Department of Marine Technology and Ocean Engineering College of Oceanography and Environmental Science Xiamen University Xiamen 361005 China Key Laboratory of Marine Biogenetic Resources Third Institute of Oceanography State Oceanic Administration Xiamen 361005 China

The diversity of modular polyketide synthase （PKS） genes in sediments of Ardley Island in Antarctica, was studied by restriction fragment length polymorphism （RFLP） analysis. Phylogenetic analysis of 14 amino acid （AA） sequences indicates that the identified ketosynthase （KS） domains were clustered with those from diverse bacterial groups, including Cyanobacteria, γ-Proteobacteria, Actinobacteria, Firmicutes, and some unidentified microorganisms from marine sponge, bryozoan and other environmental samples. The obtained KS domains showed 43%–81% similarity at the AA level to reference sequences in GenBank. Six identified KS domains showed diverse sequences of the motif （VQTACSTS） that was used to identify the hybrid PKS/nonribosomal peptide synthetase （NRPS） enzyme complex, and formed a new branch. These results reveal a high diversity and novelty of PKS genes in antarctic sediments.

关键词： polyketide synthase diversity Antarctica

北京市市属医院智慧服务患者就医体验及影响因素研究

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中国医院 2024年第4期28卷 55-59页

作者：易敏曹艳林朱晓瑞朴玉粉杨国胜陈伟娄丹田振苏曼中国医学科学院/北京协和医学院医学信息研究所北京市100020 北京市医院管理中心北京市100053 北京大学第三医院北京市100191 中国医学科学院阜外医院北京市100037 首都医科大学附属北京口腔医院北京市100035 北京大学国际医院北京市102206 北京大学肿瘤医院暨北京市肿瘤防治研究所北京市100142

目的:调研北京市市属医院智慧服务患者就医体验以及影响因素。方法:通过问卷调研北京市22所市属医院5 009例患者,对问卷结果进行统计分析。结果:北京市市属医院智慧服务患者就医体验总体满意,以支付方式便捷性满意评分最高,其次为预约... 详细信息

目的:调研北京市市属医院智慧服务患者就医体验以及影响因素。方法:通过问卷调研北京市22所市属医院5 009例患者,对问卷结果进行统计分析。结果:北京市市属医院智慧服务患者就医体验总体满意,以支付方式便捷性满意评分最高,其次为预约诊疗的便捷性以及个人医疗信息的保密性评分,然而便民服务的便捷性评分相对偏低。多变量分析发现,老年人、对医院智慧服务不太了解者、不能自助完成就诊全流程者以及外地医保者倾向于认为诊中智慧服务需要进一步改善。结论:北京市市属医院智慧服务建设在支付方式、预约诊疗以及个人医疗信息保密性等方面总体取得满意效果。然而,在医院便民服务上有待进一步加强,针对老年人、不了解医院智慧服务者等特定人群,需重点加强医院诊中智慧服务。

关键词：医院智慧服务患者就医体验多中心调研

妊娠期高血压患者血清维生素A、E水平变化及临床意义的研究

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中外女性健康研究 2024年第1期 87-89页

作者：杨姗陈玉芬范晓红丁启兰王丽萍青海省妇女儿童医院青海西宁810000

目的:探讨妊娠妇女血清维生素A、E水平对妊娠期高血压疾病的影响及其临床意义。方法:选取2020年1月至2023年1月,在本院产科门诊定期检查至住院分娩的孕妇共1586例,均进行血清维生素A、E检测,未患有妊娠期高血压、子痫前期孕妇800例作为... 详细信息

目的:探讨妊娠妇女血清维生素A、E水平对妊娠期高血压疾病的影响及其临床意义。方法:选取2020年1月至2023年1月,在本院产科门诊定期检查至住院分娩的孕妇共1586例,均进行血清维生素A、E检测,未患有妊娠期高血压、子痫前期孕妇800例作为对照组,研究组786例,其中472例为妊娠期高血压组,314例为子痫前期组,进行对比研究。结果:患有妊娠期高血压、子痫前期孕妇血清维生素A、E水平均低于对照组,且子痫前期孕妇血清维生素A、E水平低于妊娠期高血压孕妇,比较结果均具有统计学意义(P<0.05)。结论:维生素A及维生素E水平变化对预测妊娠期高血压疾病有很好的预测作用,早发现早处理,可提前干预,以降低不良妊娠结局的发生率,对HDCP的预防提供了临床价值。

关键词：维生素A 维生素E 妊娠期高血压

High-performance electronics and optoelectronics of monolayer tungsten diselenide full film from pre-seeding strategy

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InfoMat 2021年第12期3卷 1455-1469页

作者： Shu Zhang Jinbo Pang Qilin cheng Feng yang Yu chen Yu Liu yufen Li Thomas Gemming Xiaoyan Liu Bergoi Ibarlucea Jiali yang Hong Liu Weijia Zhou Gianaurelio Cuniberti Mark H.Rümmeli Collaborative Innovation Center of Technology and Equipment for Biological Diagnosis and Therapy in Universities of Shandong Institute for Advanced Interdisciplinary Research(iAIR)University of JinanJinanChina School of Chemistry and Chemical Engineering University of JinanJinanChina Department of Chemistry Southern University of Science and TechnologyShenzhenChina Institute of High Energy Physics Chinese Academy of SciencesBeijingChina College of Energy Soochow Institute for Energy and Materials InnovationsSoochow UniversitySuzhouChina Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province Soochow UniversitySuzhouChina Institute for Complex Materials Leibniz Institute for Solid State and Materials Research DresdenDresdenGermany Institute for Materials Science and Max Bergmann Center of Biomaterials Technische Universität DresdenDresdenGermany Center for Advancing Electronics Dresden Technische Universität DresdenDresdenGermany State Key Laboratory of Crystal Materials Center of Bio&Micro/Nano Functional MaterialsShandong UniversityJinanChina Dresden Center for Computational Materials Science Technische Universität DresdenDresdenGermany Dresden Center for Intelligent Materials(GCL DCIM) Technische Universität DresdenDresdenGermany Centre of Polymer and Carbon Materials Polish Academy of SciencesZabrzePoland Institute for Complex Materials IFW DresdenDresdenGermany Institute of Environmental Technology(CEET) VŠB-Technical University of OstravaOstravaCzech Republi

Tungsten diselenide (WSe2) possesses extraordinary electronic properties forapplications in electronics, optoelectronics, and emerging exciton physics. Thesynthesis of monolayer WSe2 film is of topmost for device arrays and integratedcircuits. The monolayer WSe2 film has yet been reported by thermal chemicalvapor deposition (CVD) approach, and the nucleation mechanism remainsunclear. Here, we report a pre-seeding strategy for finely regulating the nucleidensity at an early stage and achieving a fully covered film after chemicalvapor deposition growth. The underlying mechanism is heterogeneous nucle-ation from the pre-seeding tungsten oxide nanoparticles. At first, we optimized the precursor concentration for pre-seeding. Besides, we confirmed the superi-ority of the pre-seeding method, compared with three types of substrate pre-treatments, including nontreatment, sonication in an organic solvent, andoxygen plasma. Eventually, the high-quality synthetic WSe2 monolayer filmexhibits excellent device performance in field-effect transistors and photodetec-tors. We extracted thermodynamic activation energy from the nucleation andgrowth data. Our results may shed light on the wafer-scale production ofhomogeneous monolayer films of WSe2, other 2D materials, and their van derWaals heterostructures.

关键词： activation energy chemical vapor deposition field-effect transistor pre-seeding thermodynamics tungsten diselenide

Establishment of Microbial Limit Test Methods for Two Hospital Preparations

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Agricultural Biotechnology 2023年第3期12卷 92-94,127页

作者： Renhui yang Yongmin chen yufen XIA Yongyue GAO Yuling LUO Xianmei XU The Second Affiliated Hospital of Guizhou University of Traditional Chinese Medicine Guiyang 550003China Research and Development Center The Second Affiliated Hospital of Guizhou University of Traditional Chinese MedicineGuiyang 550003China

[Objectives] This study was conducted to establish microbial limit test methods for traditional Chinese medicine preparations Yunpi Granules and Bupi Qiangli Paste. [Methods] According to General Rules of Part IV of Chinese Pharmacopoeia, applicability tests were conducted on microbial limit test methods for the above two traditional Chinese medicine preparations by the plate method. [Results] The established methods showed recovery values in the range of 0.5-2.0 for both experimental strains, and the control bacteria could be detected in the experimental group, but not in the negative control group. [Conclusions] The microbial limit test methods were reliable for the two traditional Chinese medicine preparations and could be used for quality control.

关键词： Yunpi Granules Bupi Qiangli Paste Microbial limit test Method applicability test