检索结果-南通市图书馆

Stabilization of heavy metals in sediments:A bioavailability-based assessment of carbon adsorbent efficacy using diffusive gradients in thin films

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Aquaculture and Fisheries 2021年第6期6卷 601-608页

作者： Yiqin Chen Yueyue Wang ruyi zheng Ju Wen Juan-Ying Li Qian Wang Jie Yin College of Marine Ecology and Environment Shanghai Ocean UniversityShanghai201306China

This study investigated the effectiveness of carbon adsorbents as remediation material for sediments contaminated with heavy metals and the feasibility of utilizing diffusive gradients in thin films(DGT)as a biomimetic tool to estimate the accumulation of heavy metals in Venerupis philippinaram(Manila clam).The results showed that carbon materials had significant inhibitory effects(14.0-53.0%)on the enrichment of heavy metals in organisms and the order of increasing overall inhibitory effect was:charcoal,peat,activated carbon,and *** were significant correlations(P<0.0001)between the four heavy metals accumulated in Venerupis philippinaram and those accumulated in DGT devices after 28 days in the *** concentrations of heavy metals enriched in DGT(5.4-42.0%)were less than accumulations in Venerupis *** results of in situ DGT applications showed significant correlations between the amount accumulated in DGT and the acid-soluble portion in sediments for both Cu and Pb,with positive linear correlations and R-squares of 0.97 and 0.92,*** results supported the notion that a DGT device can be used as a biomimetic tool that predicts and monitors the accumulation of heavy metals in aquaculture *** studies should focus on improving the stabilization of heavy metals in sediments using different types of carbon sorbents,as well as minimizing simulation deviations using DGT.

关键词： Carbon amendment sediment remediation DGT Venerupis philippinaram Heavy metals Bioavailability Bioaccumulation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

柏叶口水库水利枢纽工程的导流设计

水力发电 2012年第6期38卷 57-59页

作者：郑如义山西省水利水电勘测设计研究院山西太原030024

通过对柏叶口水库坝址区地形、地质、气象及水文等条件进行分析,结合该工程面板坝的具体特点,提出了全断面汛期围堰导流方案。实际施工时,大坝填筑速度快,坝体次堆石区的填筑高度很快超过上游围堰的高度,根据规范提出坝体临时度汛洪水... 详细信息

通过对柏叶口水库坝址区地形、地质、气象及水文等条件进行分析,结合该工程面板坝的具体特点,提出了全断面汛期围堰导流方案。实际施工时,大坝填筑速度快,坝体次堆石区的填筑高度很快超过上游围堰的高度,根据规范提出坝体临时度汛洪水标准按P=2%设计,并制定了临时度汛方案。实践表明,汛期水流平稳通过导流洞,大坝施工未受影响,导流方案设计合理、可靠。

关键词：导流标准导流方式导流方案度汛柏叶口水库

维普期刊数据库

Changes in peripheral perfusion index within 72h of life in a cohort of very low birth weight infants

在线全文

学校读者我要写书评

暂无评论

Chinese Medical Journal 2022年第10期135卷 1252-1254页

作者： Xiaojing Hu Conway Niu ruyi zheng Li Zhang Hongyan Chen Yun Cao Guoying Huang Neonatal Congenital Heart Disease Screening Office Children's Hospital of Fudan UniversityShanghai 201102China Department of Neonatology King Edward Memorial HospitalSubiacoPerthWestern Australia 6008Australia Department of Neonatology Children's Hospital of Fudan UniversityShanghai 201102China Department of Clinical Epidemiology and Clinical Trial Unit Children's Hospital of Fudan UniversityShanghai 201102China Shanghai Key Laboratory of Birth Defects Shanghai 201102China

To the Editor:The latest generation of pulse oximeters are equipped with technology allowing for monitoring of the peripheral perfusion index(PI),the percentage of the amount of light absorbed by pulsatile tissue(variable arterial blood flow)over non-pulsatile tissue(venous blood,muscle,and other tissues)at a wavelength of 940 nm as a signal.

关键词： index equipped weight

维普期刊数据库

3D Hessian deconvolution of thick light-sheet z-stacks for high-contrast and high-SNR volumetric imaging

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2020年第6期8卷 1011-1021页

作者： ZHE ZHANG DONGZHOU GOU FAN FENG ruyi zheng KE DU HONGRUN YANG GUANGYI ZHANG HUITAO ZHANG LOUIS TAO LIANGYI CHEN HENG MAO LMAM School of Mathematical SciencesPeking UniversityBejing 100871China State Key Laboratory of Membrane Biology Bejing Key Laboratory of Cardiometabolic Molecular MedicineInstitute of Molecular MedicinePeking UniversityBeijing 100871China Center for Bioinformatics National Laboratory of Protein Engineering and Plant Genetic EngineeringSchool of Life SciencesPeking UniversityBeijing 100871China School of Software and Microelectronics Peking UniversityBeijing 100871China Bejing Advanced Innovation Center for Imaging Theory and Technology Cepital Normal UniversityBeijing 100871China

Due to its ability of optical sectioning and low phototoxicity,z-stacking light-sheet microscopy has been the tool of choice for in vivo imaging of the zebrafish *** image the zebrafish brain with a large field of view,the thickness of the Gaussian beam inevitably becomes several times greater than the system depth of field(DOF),where the fluorescence distributions outside the DOF will also be collected,blurring the *** this paper,we propose a 3D deblurring method,aiming to redistribute the measured intensity of each pixel in a light-sheet image to in situ voxels by 3D *** introducing a Hessian regularization term to maintain the continuity of the neuron dis-tribution and using a modified stripe removal algorithm,the reconstructed z stack images exhibit high contrast and a high signal-to-noise *** performance characteristics can facilitate subsequent processing,such as 3D neuron registration,segmentation,and recognition.

关键词： Hessian image thick

维普期刊数据库

Optimization of Extraction Process of Polyphenols from Chrysanthemum morifolium and the Development of Chrysanthemum Rice Wine

在线全文

学校读者我要写书评

暂无评论

Agricultural Biotechnology 2023年第5期12卷 62-66,74页

作者： Weiyi CHEN Yufeng ZHANG Zoukai HUANG ruyi zheng Caiyun HUANG Xunjian CHEN Yuhan FU Weixin WANG College of Biology and Agricultural Resources Huanggang Normal UniversityCollaborative Innovation Center for the Development of Dabie Mountains Characteristic ResourcesHubei Key Laboratories of Economic Forest Germplasm Improvement and Comprehensive Resources UtilizationHuanggang 438000China Tuanfeng Experimental Primary School Huanggang 438000China

[Objectives]This study was conducted to provide a theoretical basis for the extraction and comprehensive utilization of functional active components of Chrysanthemum morifolium polyphenols.[Methods]With *** as a raw material,polyphenols were extracted by water *** extraction process of polyphenols were optimized by single factor tests on solid-liquid ratio,extracting time and *** rice wine selected as the base wine was added with *** polyphenol extract,honey,citric acid and other auxiliary materials to prepare a kind of chrysanthemum old rice *** sensory analysis combined with fuzzy mathematics comprehensive evaluation method,the optimal formula of chrysanthemum old rice wine was determined,and the corresponding physicochemical indicators of the obtained chrysanthemum old rice wine were tested.[Results]The optimal soaking process for *** was as follows:extraction time of 20 min,a solid-liquid ratio of *** to warm water at 1:40,extraction times of 3 *** physical and chemical indicators of the chrysanthemum wine obtained from the above optimal formula were as follows:sugar content 5%,ethanol content 11%,and pH value *** chrysanthemum old rice wine obtained was clear and transparent,and the fragrance of chrysanthemum was coordinated with the mellow aroma of rice *** taste was refreshing and suitable for the vast majority of people to drink.[Conclusions]The new type of chrysanthemum old rice wine combines the polyphenolic active substances in *** with the low ethanol content of old rice wine,which not only improves the utilization rate of ***,but also strengthens the health function of old rice wine products,improves the quality of old rice wine,and promotes the healthy and rapid development of the old rice wine industry.

关键词： Polyphenol Chrysanthemum morifolium Forest phenol Fuzzy mathematic analysis Chrysanthemum old rice wine

Changes in Polyphenols and Antioxidant Activities of Yingshan Yunwu Tea during Digestion in Vitro

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Medicinal Plant 2024年第2期15卷 21-25页

作者： ruyi zheng Jinjie ZHOU Wenzhuo WU Jianfeng ZHAN Peng WU Ting DING Weixin WANG College of Biology and Agricultural Resources Huanggang Normal UniversityHubei Collaborative Innovation Center for the Characteristic Resources Exploitation of Dabie MountainsHubei Key Laboratory of Economic Forest Germplasm Improvement and Resources Comprehensive UtilizationHuanggang 438000China Hubei Hongan County Public Inspection and Testing Center Huanggang 438000China

[Objectives]To explore the change rule of polyphenol content and antioxidant activity of coarse old leaves of Yingshan Yunwu Tea in the process of human digestion.[Methods]The coarse and old leaves of Yunwu tea in Yingshan,Huanggang,Hubei Province were selected as the research object,and their digestion in vitro was *** total polyphenol content was determined by Folin-phenol reagent colorimetric method,and the DPPH radical scavenging activity and total antioxidant activity were determined.[Results]After simulated gastrointestinal digestion in vitro,the polyphenol content and antioxidant activity of coarse old leaf tea soup showed a downward *** gastrointestinal digestion,the polyphenol content in tea infusion separately decreased by 31.8%and 8.5%;the scavenging rate of DPPH free radical was 97%before digestion,decreased to 92%after gastric digestion and 65%after intestinal digestion,which decreased by 5%and 27%,respectively;after gastrointestinal digestion,the total antioxidant capacity of tea soup decreased by 4.7%and 3.1%,respectively.[Conclusions]This study provided a reference for the development and application of coarse old leaves of Yingshan Yunwu tea,and provided a reference for the nutritional value evaluation and comprehensive utilization of coarse old leaves,so as to make the best use of coarse tea leaves and reduce the waste of resources.

关键词： Coarse old leaves of Yunwu tea Polyphenol Digestion in vitro Antioxidant activity

Linderalactone mitigates diabetic cardiomyopathy in mice via suppressing the MAPK/ATF6 pathway

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Linderalactone mitigates diabetic cardiomyopathy in mice via...

Short-term Photovoltaic Power Prediction Based on Feature Optimization and Hybrid Improved Grey Wolf Algorithm-optimized BiLSTM Network

2023年全国心血管药理学学术会议

作者： ruyi zheng Yanan Liu Weiqi Li Jiajia Zhang Yu Tu Jiajia Wei Huazhong Ying Xue Han Zhejiang Provincial Key Laboratory of Laboratory Animals and Safety Research Hangzhou Medical College College of Pharmaceutical Science Zhejiang Chinese Medical University Department of Cardiology The First Affiliated Hospital of Wenzhou Medical University Chemical Biology Research Center School of Pharmaceutical SciencesWenzhou Medical University

Diabetic cardiomyopathy(DCM) is a challenging diabetic complication that manifests as chronic ***,the mechanism underlying diabetes-associated myocardial injury is not fully *** investigated the pharmacological effects and mechanisms of linderalactone,a natural compound that can prevent diabetes-induced cardiomyopathy in *** was induced by a single dose of streptozotocin(120 mg/kg,i.p.).Diabetic mice were administrated with linderalactone(2.5 or 5 mg/kg) by gavage for five *** heart tissues were then subjected to RNA-sequencing analysis to explore the potential mechanism of *** prevented heart dysfunction by inhibiting myocardial hypertrophy,fibrosis,and inflammation,without altering blood ***-sequencing indicated that linderalactone exerted its cardioprotective effects mainly by affecting the mitogen-activated protein kinase(MAPK)/activating transcription factor 6(ATF6) *** also suppressed endoplasmic reticulum(ER) stress mediated by the diabetes-activated MAPKs/ATF6 pathway,thereby reducing myocardial hypertrophy and inflammation in heart tissues and in cultured *** of MAPKs or a deficiency of ATF6 in cardiomyocytes mimicked the linderalactone-associated decreases in high glucose-induced hypertrophy and *** showed beneficial effects in alleviating diabetic cardiomyopathy,in part by modulating the MAPK/ATF6 signaling pathway to mitigate myocardial hypertrophy and *** may have clinical utility in the treatment for diabetes-associated cardiomyopathy.

关键词： Linderalactone mitigates diabetic cardiomyopathy in mice via suppressing the MAPK/ATF6 pathway ATF

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Dianwang Jishu/Power System Technology 2025年第1期49卷 209-222页

作者： Zhao, ruyi Wang, Xiaohui zheng, Bihuang Li, Daoxing Gao, Yi Guo, Pengtian China Electric Power Research Institute Haidian District Beijing 100192 China Economic and Technological Research Institute State Grid Tianjin Electric Power Company Hedong District Tianjin 300171 China

To address the challenges posed by strong noise interference in photovoltaic (PV) sequences and the issues of low accuracy and poor generalization of a single model in PV power prediction, we propose a short-term PV power prediction method. This method uses feature optimization and a hybrid improved Grey Wolf algorithm to optimize the BiLSTM network. Firstly, the mutual information algorithm is employed for variable selection in input data to eliminate redundant variables. Subsequently, the Complementary Ensemble Empirical Mode Decomposition and an improved wavelet threshold algorithm are applied to the selected data for feature reconstruction to reduce noise interference in the data and optimize input variable features. Finally, the standard Grey Wolf Optimizer algorithm underwent hybrid optimization by integrating improved Tent chaotic mapping, nonlinear decreasing factors, dynamic weight strategies, and the differential evolution algorithm. This process aimed to ascertain the optimal hyperparameter combination for the BiLSTM network. The attention mechanism was also employed to extract key temporal information from the data, developing a novel short-term photovoltaic power prediction model. Simulation experiments demonstrate that, compared to the least squares support vector machine, long short-term memory network, and bidirectional long short-term memory neural network, the proposed model achieves an average reduction of 12.45%, 7.95%, and 5.37% in root mean square error under various weather conditions such as sunny, cloudy, overcast, and rainy, showcasing excellent predictive performance, good generalization ability, and promising engineering application value. © 2025 Power System Technology Press. All rights reserved.

关键词： Mean square error

行动导向教学法在中职旅游专业教学中的应用探究

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

成才之路 2024年第25期 89-92页

作者：郑如意福建省漳州高新职业技术学校福建漳州363601

近年来,中职教育改革不断深入,强调以学生为中心,注重实践教学和职业素养的培养。行动导向教学法是一种以实践为导向、以学生为主体的教学方法,与中职教育改革的理念高度契合,成为推动中职旅游专业教学改革的重要力量。行动导向教学法... 详细信息

近年来,中职教育改革不断深入,强调以学生为中心,注重实践教学和职业素养的培养。行动导向教学法是一种以实践为导向、以学生为主体的教学方法,与中职教育改革的理念高度契合,成为推动中职旅游专业教学改革的重要力量。行动导向教学法通过设定具体的学习任务和实践项目,让学生在完成任务的过程中主动学习、探索和实践,有助于满足学生的学习需求,提升他们的学习效果。文章阐述行动导向教学法的基本内涵与特征,探讨行动导向教学法在中职旅游专业教学中的应用策略,旨在全面提升中职旅游专业的教学质量,为社会培养更多具备高素质、高技能的旅游行业人才。

关键词：中职行动导向教学法旅游专业应用策略职业素养人才培养

维普期刊数据库博看期刊