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Nd isotopic variations and its implications in the recent sediments from the northern South China Sea

Chinese Science Bulletin 2009年第2期54卷 311-317页

作者： SHAO Lei QIAO PeiJun PANG Xiong WEI GangJian LI qianyu MIAO WeiLiang LI Ang State Key Laboratory of Marine Geology Tongji University Shanghai 200092 China CNOOC Ltd. Shenzhen Guangzhou 510240 China Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China

The chondrite-normalized REE distribution patterns in recent sediments from the northern South China Sea and surrounding areas are similar, with the HREE values being almost equal to or slightly higher, and the LaN/LuN ratio being lower, than PAAS standards. However, samples from the Xijiang River, a major branch of the Pearl River system, show opposite trends, i.e., with slightly lower HREE values and higher LaN/LuN ratio than PAAS. The distribution of Nd isotopes in sediments from the northern South China Sea was controlled by the Pearl River and the inshore area of South China, respectively. The volume of εNd(0) from inshore areas of southern China is apparently higher than that from the Pearl River, and εNd(0) values in offshore sediments and Taiwan Island are between these values. The results clearly show that εNd(0) volume in the northeastern South China Sea is higher than in the southwest part of the northern South China Sea, indicating different source rock types. The main source rock of the Pearl River sediment is carbonate types and affects sediment deposition in the southwest of the northern South China Sea, while the source rock in the inshore area of southern China, mainly Mesozoic and Cenozoic granites, contributes to sediments in the northeastern area of the northern South China Sea. Due to different source rock types, the HREE values and the volume of εNd(0) in recent sediments supplied by the inshore area of southern China are higher than those from the Pearl River. Over 80% of the rapidly accumulated sediments on the northern slope of the South China Sea in the southeast of Dongsha Islands area were derived from Taiwan Island and from inshore areas of South China, with only less than 20% from the Pearl River.

关键词：南海东部台湾海峡环流机制数值研究海洋科学

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The evolution of central environmental protection inspection policy attention in China: An investigation based on inspection reports

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Chinese Journal of Population,Resources and Environment 2023年第4期21卷 203-211页

作者： Zhenhua Zhang qianyu Liu Yongxi Chen Shuai Shao Yating Tang School of Economics Lanzhou UniversityLanzhou730000China Institute of Green Finance Lanzhou UniversityLanzhou730000China School of Management Lanzhou UniversityLanzhou730000China School of Business East China University of Science and TechnologyShanghai200237China

The central environmental protection inspection (CEPI) system in China is a significant institutional innova‐tion in national environmental governance. The CEPI applies a joint supervision strategy to address salient en‐vironmental issues and strictly enforce the environmental responsibilities of local governments. This study col‐lects and organizes CEPI inspection reports covering three stages that encompass the first round, the “look back”, and the second round, applying text analysis to obtain sample data and conduct statistical quantifica‐tion of word frequency in inspection reports and identify notable changes. The study explores the allocation of CEPI attention between policy objectives and the intensity of policy instruments. We determine that in con‐junction with public opinion feedback, the CEPI conducts targeted inspections and focuses more on pollutant governance, which has high severity and can be addressed quickly. The CEPI fills the gap of normalized gover‐nance with a campaign-style governance approach. Regarding the intensity of policy measures, the CEPI pri‐marily uses economic incentive policy instruments, supplemented by command-and-control and public guid‐ance approaches, advancing the sustainability of regulatory effectiveness through economic, social, and politi‐cal activities. This study extends knowledge in the field of CEPI policy priorities and implementation, expand‐ing the literature related to outcomes of environmental policy in developing countries.

关键词： Central environmental protection inspection Text analysis method Policy attention Policy instruments Policy objectives China

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Simulation and analysis of UHV half wavelength and DC hybrid transmission system

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Global Energy Interconnection 2018年第3期1卷 366-375页

作者： qianyu Zhao Shouxiang Wang Xiaohui Qin Seyedamirabbas Mousavian Lei Wu Tianjin University Key Laboratory of Smart Grid of Ministry of Education China Electric Power Research Institute School of Business Clarkson University Department of Electrical and Computer Engineering Clarkson University

The scenarios of a half wavelength transmission line(HWTL) connected to the original DC asynchronous interconnection system are established based on the quasi-steady state model of HWTL, which include single or double loops of single channel and multi-channel scenarios with different starting and landing points. Firstly, the steady state power flow characters of multi-scenario transmission schemes are studied. The voltage distribution characters of HWTL are analyzed when its transmission power and power factor vary, and the influence of the DC power variation on voltage of HWTL is discussed. Then the transient characters of HWDHTS are explored. The DC commutation failure caused by the fault of HWTL is simulated and the power transfer capacity of HWTL while DC blocking is calculated in this paper.

关键词： UHV half-wavelength AC power transmission line UHV DC system Steady state characters Transient stability

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Chemical Mechanism of Flower Color Microvariation in Paeonia with Yellow Flowers

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Horticultural Plant Journal 2020年第3期6卷 179-190页

作者： Yong Yang Bing Li Chengyong Feng Qian Wu qianyu Wang Shanshan Li Xiaonan Yu Liangsheng Wang Key Laboratory of Plant Resources/Beijing Botanical Garden Institute of BotanyChinese Academy of SciencesBeijing 100093China Beijing Key Laboratory of Ornamental Plants Germplasm Innovation and Molecular Breeding National Engineering Research Center for FloricultureCollege of Landscape ArchitectureBeijing Forestry UniversityBeijing 100083China University of Chinese Academy of Sciences Beijing 100049China

Paeonia species are important ornamental plants,including three types:tree peony,herbaceous peony,and Itoh hybrid *** with yellow color is desired and becoming ***,the chemical mechanism of the formation of yellow flowers in Paeonia is still *** this study,14 representative samples were selected:four samples of three species of Paeonia,four herbaceous peony cultivars,three lutea hybrid tree peony cultivars,and three Itoh hybrid peony *** petal extracts of the samples were determined by HPLC-DAD and HPLCQ-TOF-MS/*** total,29 flavonoids were isolated and identified,including 28 flavonol glycosides and one chalcone *** were significant differences in the composition and content of flavonoids in petals of different cultivars(species).The total content of flavonoids was between 19.430 and 143.043 mg·g^−1 *** glycosides were detected in all *** 2′-O-glucoside was detected from one herbaceous peony cultivar‘Golden Wheel’lutea hybrid tree peony cultivars,and Itoh peony *** content of chalconaringenin 2′-O-glucoside in the samples was more than 43% of total *** pigment type and content of lutea hybrid tree peonies and Itoh hybrid peonies are *** flavonoids,especially quercetin 3-O-galloylglucoside and chalconaringenin 2′-O-glucoside contribute greatly to the formation of yellow flowers of *** results of this study provide a comprehensive understanding of the chemical mechanism for yellow flower coloration of Paeonia,and lay the foundation for yellow flower breeding of Paeonia.

关键词： Paeonia Yellow flower HPLC Flavonoid composition Breeding

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Synergistic antifungal mechanism of effective components from essential oil against Penicillium roqueforti

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Engineering Microbiology 2023年第1期3卷 1-11页

作者： Fangyuan Zhao qianyu Li Hao Wu Jinglin Huang Jian Ju Special Food Research Institute Qingdao Agricultural UniversityQingdao 266109China Qingdao Special Food Research Institute Qingdao 266109China Key Laboratory of Special Food Processing(Co-construction by Ministry and Province) Ministry of Agriculture Rural AffairsChina

Essential oil(EO)has significant antifungal ***,there is limited information on the mechanism of the synergistic antifungal effect of the effective components of EO against *** the present study,molecular electrostatic potential and molecular docking were used for the first time to investigate the synergistic antifungal mechanism of eugenol and citral small molecule(C_(EC))against Penicillium *** results showed that the C_(EC)treatment made the activity ofβ-(1,3)-glucan synthase(GS)and chitin synthase(CS)decreas by 20.2%and 11.1%,respectively,and the contents of which decreased by 85.0%and 27.9%,respectively compared with the control *** docking revealed that C EC small molecules could bind to GS and CS through different amino acid residues,inhibiting their activity and *** C EC can combine with tryptophan,tyrosine,and phenylalanine in the cell membrane,causing damage to the cell *** binding sites between small molecules and amino acids were mainly around the OH *** addition,C EC affected the energy metabolism system and inhibited the glycolysis ***,C EC treatment reduced the ergosterol content in the cell membrane by 58.2%compared with the control ***,changes in𝛽-galactosidase,metal ion leakage,and relative conductivity confirmed the destruction of the cell membrane,which resulted in the leakage of cell *** above results showed that C EC can kill *** by inhibiting energy metabolism and destroying the integrity of the cell membrane.

关键词： Essential oil Antifungal mechanism Molecular docking Molecular potential

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The role of reactive oxygen species in gastric cancer

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Cancer Biology & Medicine 2024年第9期21卷 740-753页

作者： Yuqi Wang Jingli Xu Zhenjie Fu Ruolan Zhang Weiwei Zhu qianyu Zhao Ping Wang Can Hu Xiangdong Cheng College of Pharmaceutical Sciences Zhejiang University of TechnologyHangzhou 310014China Department of Gastric Surgery Zhejiang Cancer HospitalHangzhou 310022China Key Laboratory of Prevention Diagnosis and Therapy of Upper Gastrointestinal Cancer of Zhejiang ProvinceHangzhou 310022China Zhejiang Provincial Research Center for Upper Gastrointestinal Tract Cancer Zhejiang Cancer HospitalHangzhou 310022China

Gastric cancer(GC)ranks fifth in cancer incidence and fourth in cancer-related mortality *** oxygen species(ROS)are highly oxidative oxygen-derived products that have crucial roles in cell signaling regulation and maintaining internal *** are closely associated with the occurrence,development,and treatment of *** review summarizes recent findings on the sources of ROS and the bidirectional regulatory effects on GC and discusses various treatment modalities for GC that are related to ROS *** addition,the regulation of ROS by natural small molecule compounds with the highest potential for development and applications in anti-GC research is *** aim of the review is to accelerate the clinical application of modulating ROS levels as a therapeutic strategy for GC.

关键词： Gastric cancer reactive oxygen species ROSantitumor therapy natural products pharmacology

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Improved thermal conductivity of styrene acrylic resin with carbon nanotubes, graphene and boron nitride hybrid fillers

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Carbon Resources Conversion 2021年第1期4卷 190-196页

作者： Fuhua Jia Emmanuel Oluwaseyi Fagbohun qianyu Wang Duoyin Zhu Jianling Zhang Bin Gong Yanbin Cui State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China College of Mechanical and Power Engineering Shenyang University of Chemical TechnologyShenyang 110142China University of Chinese Academy of Sciences Beijing 100049 China

In the process of printing and copying,the volatilization of toner produces tiny particles and harmful gases that are detrimental to the human ***-temperature printing and copying can reduce harmful gas *** acrylic resin is the main component of toner and the thermal conductivity of toner can be improved by increasing the thermal conductivity of styrene acrylic *** this paper,hexagonal boron nitride(h-BN),carboxyl modified multi-walled carbon nanotubes(MWCNTs-COOH)and graphene hybrid fillers were added into styrene acrylic resin to improve the thermal conductivity of resin composite by forming a connected thermal conductivity network in *** experimental result shows that the thermal conductivity of the h-BN/styrene acrylic resin composite increases with the increase in h-BN filler content(0-20wt%).When 20.0 wt%h-BN is added into styrene acrylic resin,the thermal conductivity is increased by 83.63%.Hybrid fillers(MWCNTs-COOH/graphene and 3.0 wt%h-BN)were added in styrene acrylic resin and the thermal conductivity of the composite is almost the same or higher than that of 20.0 wt%h-BN/styrene acrylic resin *** thermal conductivity of styrene acrylic resin composites improved by 69.57%and 87.14%via adding 1.5wt%CNTs-3 wt%h-BN and 1.0wt%graphene-3 wt%***-COOH or graphene can bridge isolated h-BN aggregates to form a thermally conductive network in styrene acrylic resin,while the addition of graphene improves the thermal conductivity of resin composite higher than that of MWCNTs-COOH.

关键词： Styrene acrylic resin Boron nitride Carbon nanotubes Graphene Thermal conductivity

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香菇复水过程中质地及风味变化

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食品科学 2025年第3期46卷 46-55页

作者：李倩钰曹雪慧禚秋辰尤开艳梁志棠朱丹实渤海大学食品科学与工程学院佛山市顺德区俊凌厨具有限公司

为探究干香菇在复水过程中质地及风味的变化，本研究将干香菇于不同温度条件下进行恒温复水处理，采用电子舌、顶空固相微萃取-气相色谱-质谱联用技术和激光扫描共聚焦显微镜等技术对复水阶段香菇的质地及风味特性进行分析。结果表明，... 详细信息

为探究干香菇在复水过程中质地及风味的变化，本研究将干香菇于不同温度条件下进行恒温复水处理，采用电子舌、顶空固相微萃取-气相色谱-质谱联用技术和激光扫描共聚焦显微镜等技术对复水阶段香菇的质地及风味特性进行分析。结果表明，不同复水温度和时间对复水香菇的质地、挥发性风味和滋味均有影响。其中，40℃复水30 min时的复水比达到平衡，鲜味强度值较高，但与其他组相比持水率有所下降，硬度和咀嚼性适中，弹性达到最大值，其菌盖褐变指数相对较高，但内褶褐变不明显，微观结构显示其菌丝较为舒展，剪切力适中。此外，40℃复水的香菇其抗氧化性高于100℃复水的香菇，可溶性蛋白损失更少，游离氨基酸含量更高并在30 min达到最大值。同时以含硫化合物和酮类为主的特征风味物质得到较好保留，而100℃复水时特征性化合物含量下降严重。综上，复水过程中香菇的质地及风味会发生显著变化，将干香菇于40℃中复水30 min能够获得较好的品质。

关键词：香菇复水性微观结构质地鲜味物质

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The combination of DNA methylation and positive regulation of anthocyanin biosynthesis by MYB and bHLH transcription factors contributes to the petal blotch formation in Xibei tree peony

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Horticulture Research 2023年第7期10卷 69-86页

作者： Jin Zhu Yizhou Wang qianyu Wang Bing Li Xiaohan Wang Xian Zhou Hechen Zhang Wenzhong Xu Shanshan Li Liangsheng Wang Key Laboratory of Plant Resources Institute of BotanyChinese Academy of SciencesBeijing 100093China China National Botanical Garden Beijing 100093 China University of Chinese Academy of Sciences Beijing 100049China Horticulture Research Institute Henan Academy of Agricultural SciencesZhengzhou 450002China

Xibei tree peony is a distinctive cultivar group that features red–purple blotches in ***,the pigmentations of blotches and non-blotches are largely independent of one *** underlying molecular mechanism had attracted lots of attention from investigators,but was still *** present work demonstrates the factors that are closely related to blotch formation in Paeonia rockii‘Shu Sheng Peng Mo’.Non-blotch pigmentation is prevented by the silencing of anthocyanin structural genes,among which PrF3H,PrDFR,and PrANS are the three major *** characterized two R2R3-MYBs as the key transcription factors that control the early and late anthocyanin biosynthetic ***1,which belongs to MYB subgroup 7(SG7)was found to activate the early biosynthetic gene(EBG)PrF3H by interacting with SG5 member PrMYBa2 to form an‘MM’*** SG6 member PrMYBa3 interacts with two SG5(IIIf)bHLHs to synergistically activate the late biosynthetic genes(LBGs)PrDFR and PrANS,which is essential for anthocyanin accumulation in petal *** comparison of methylation levels of the PrANS and PrF3H promoters between blotch and non-blotch indicated a correlation between hypermethylation and gene *** methylation dynamics of PrANS promoter during flower development revealed a potential early demethylating reaction,which may have contributed to the particular expression of PrANS solely in the blotch *** suggest that the formation of petal blotch may be highly associated with the cooperation of transcriptional activation and DNA methylation of structural gene promoters.

关键词： belongs synergistic pigment

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Photosensitive pro-drug nanoassemblies harboring a chemotherapeutic dormancy function potentiates cancer immunotherapy

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Acta Pharmaceutica Sinica B 2023年第2期13卷 879-896页

作者： Jianjun Cheng Haitian Zhao Bin Li Hua Zhang qianyu Zhao Shiyao Fu Ying Han Weihong Lu Jiahua Shi Xin Yang School of Medicine and Health Harbin Institute of TechnologyHarbin 150001China Academician Workstation Jiangxi University of Chinese MedicineNanchang 330004China School of Chemistry and Chemical Engineering Harbin Institute of TechnologyHarbin 150001China Chongqing Research Institute Harbin Institute of TechnologyChongqing 401135China National and Local Joint Engineering Laboratory for Synthesis Transformation and Separation of Extreme Environmental NutrientsHarbin 150001China Key Laboratory of Natural Medicine and Immune-Engineering of Henan Province Henan UniversityKaifeng 475004China

Immunotherapy combined with effective therapeutics such as chemotherapy and photodynamic therapy have been shown to be a successful strategy to activate anti-tumor immune responses for improved anticancer ***,developing multifunctional biodegradable,biocompatible,low-toxic but highly efficient,and clinically available transformed nano-immunostimulants remains a challenge and is in great ***,we report and design of a novel carrier-free photo-chemotherapeutic nano-prodrug COS-BA/Ce6 NPs by combining three multifunctional components-a self-assembled natural small molecule betulinic acid(BA),a water-soluble chitosan oligosaccharide(COS),and a low toxic photosensitizer chlorin e6(Ce6)-to augment the antitumor efficacy of the immune adjuvant anti-PD-L1-mediated cancer *** show that the designed nanodrugs harbored a smart and distinctive“dormancy”characteristic in chemotherapeutic effect with desired lower cytotoxicity,and multiple favorable therapeutic features including improved^(1)O_(2)generation induced by the reduced energy gap of Ce6,pH-responsiveness,good biodegradability,and biocompatibility,ensuring a highly efficient,synergistic ***,when combined with anti-PD-L1 therapy,both nano-coassembly based chemotherapy and chemotherapy/photodynamic therapy(PDT)could effectively activate antitumor immunity when treating primary or distant tumors,opening up potentially attractive possibilities for clinical immunotherapy.

关键词： Cancer immunotherapy Nano-immunostimulants Chemotherapeutic dormancy Pro-drug Self-assembly Natural small molecule Betulinic acid Photodynamic therapy

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