检索结果-南通市图书馆

Strategies and prospects for melatonin to alleviate abiotic stress in horticultural plants

Horticultural Plant Journal 2024年第3期10卷 601-614页

作者： Xiaoyun Wang Meng Cao Hongxin li Ying liu Shuangxi Fan na zhang Yangdong Guo College of Horticulture China Agricultural UniversityBeijing100193China College of Plant Science and Technology Beijing University of AgricultureBeijing102206China Beijing Bei Nong Enterprise Management Co. Ltd.Beijing102206China Sanya Institute of China Agricultural University SanyaHainan572000China

Melatonin is a conserved pleiotropic molecule in animals and *** is involved in many development processes and stress responses;thus,exploring its function in plants,particularly in horticultural plants,has become a rapidly developing *** studies have revealed that phytomelatonin acts as a plant biostimulant and increase its tolerance to various abiotic stressors,including extreme temperature,drought,osmotic disturbance,heavy metals,and ultraviolet(UV).Melatonin appears to have roles in the scavenging of reactive oxygen species(ROS)and other free radicals,affecting the primary and secondary metabolism of plants,regulating the transcripts of stress-related enzymes and transcription factors,and crosstalk with other hormones under different environmental *** pleiotropy makes phytomelatonin an attractive regulator to improve resistance to abiotic stress in *** recent discovery of the potential phytomelatonin receptor CAND2/PMTR1 and the proposition of putative models related to the phytomelatonin signaling pathways makes phytomelatonin a new plant *** on relevant studies from our laboratory,this review summarizes the phytomelatonin biosynthetic and metabolic pathways in plants and the latest research progress on phytomelatonin in abiotic stress of horticultural *** study will provide a reference for elucidating the regulatory mechanism of phytomelatonin affecting the resistance to abiotic stress in plants.

关键词： Abiotic stress Biostimulant Horticultural plants Phytomelatonin

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Sperm acrosin activity may be a useful factor in choosing between ICSI and IVF for infertile male patients

引用

Asian Journal of Andrology 2024年第1期26卷 85-90页

作者： Ye-na Hu liang Hu Xin-Yu Yin Huan zhang Yang-Qin Peng Gang liu Ge lin Wei-na li The Institute of Reproductive and Stem Cell Engineering School of Basic Medical ScienceCentral South UniversityChangsha 410008China Department of Andrology Reproductive and Genetic Hospital of CITiC-XiangyaChangsha 410013China Clinical Research Center for Reproduction and Genetics in Hunan Province Changsha 410013China Hunan Guangxiu Hi-tech life Technology Co. Ltd.Changsha 410013China

The clinical applications of acrosin activity are *** analyzed 61578 male partners in infertile couples who visited the outpatient department of the Reproductive and Genetic Hospital of CITIC-Xiangya(Changsha,China)between August 2014 and December 2019 to determine the reference ranges and thresholds for acrosin activity in infertile Chinese men;to determine whether correlations exist between acrosin activity and age,sperm concentration,sperm morphology,or sperm motility;and to evaluate whether acrosin activity could serve as an effective prognostic indicator for choosing between in vitro fertilization(IvF)and intracytoplasmic sperm injection(icsl)in the *** cut-off value for the normal reference range of acrosin activity for male partners in infertile couples was 24.78μlU per 106 *** was no significant association between acrosin activity and age,sperm concentration,semen volume,total sperm count,progressive motility,or total motile spermatozoa.A weak positive correlation was found between acrosin activity and normal sperm *** was a statistically significant difference in abnormal acrosome morphology between the group with high acrosin activity(>24.78μlU per 106 sperm)and the group with low acrosin activity(lization rate had a high index of abnormal acrosomal morphology at 21.2%,while the group with a high IVF fertilization rate had a low index of 0.2%.At an acrosin activity oflization rate,normal fertilization rate,and good-quality embryo rate for Icsl were significantly higher than those for ***,the most promising application of acrosin activity could be in the selection of IcsI over IVF for infertile male patients with complete fertilization failure or a low fertilization rate.

关键词： acrosin activity fertilization rate ICSI IVF semen parameters

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Segregation of C and P in Steel Droplets Solidified in Drop Tube

引用

Journal of Iron and Steel Research International 2011年第S1期18卷 282-286页

作者： li na,zhang Jun-wei,ZHAI Lu-lu (School of Material and Metallurgy,University of Science and Technology liaoning,Anshan,114051,liaoning,China) Univ Sci & Technol liaoning Sch Mat & Met Anshan 114051 Liaoning Peoples R China

The properties of steels can be improved by adding appropriate amount of alloying ***,the quality and properties of steels may be affected due to the segregation of the alloying *** solidification was regarded to be an effective method to reduce or eliminate the segregation of alloying *** in this paper,the segregation of C and P was also observed in rapid solidified carbon steel droplets (in silicon oil) by drop tube *** distributions of alloying elements in 0.2m drop tube samples were similar to those in 50m drop tube *** in both 0.2m and 50m drop tube,the segregation of C and P was quite different when the contents of the samples were varied,the segregation profiles were discussed in *** microstructures of 50m droplet samples were a little finer than those of 0.2m droplet *** solidification speed was approximately the same from the surface to the center of each *** high-C samples,the microstructure was also corresponding to the distribution of C.

关键词： segregation C P droplet drop tube

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Scattering-based hybrid network for facial attribute classification

引用

Frontiers of Computer Science 2024年第3期18卷 105-116页

作者： na liU Fan zhang liang CHANG Fuqing DUAN School of Artificial Intelligence Beijing Normal UniversityBeijing 100875China

Face attribute classification(FAC)is a high-profile problem in biometric verification and face *** recent research has been devoted to extracting more delicate image attribute features and exploiting the inter-attribute correlations,significant challenges still *** scattering transform(WST)is a promising non-learned feature *** has been shown to yield more discriminative representations and outperforms the learned representations in certain *** to the image classification task,WST can enhance subtle image texture information and create local deformation *** paper designs a scattering-based hybrid block,to incorporate frequency-domain(WST)and image-domain features in a channel attention manner(Squeezeand-Excitation,SE),termed WS-SE *** with CNN,WS-SE achieves a more efficient FAC performance and compensates for the model sensitivity of the small-scale affine *** addition,to further exploit the relationships among the attribute labels,we propose a learning strategy from a causal *** cause attributes defined using the causalityrelated information can be utilized to infer the effect attributes with a high confidence *** analysis experiments demonstrate the effectiveness of our model,and our hybrid model obtains state-of-the-art results in two public datasets.

关键词： wavelet scattering transform causality-related learning facial attribute classification

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Hypolipidemic activity and mechanism of active components of Dracocephalum moldavica L. tea

引用

Food Science and Human Wellness 2024年

作者： Siqi li Qinyu li na zhang Minhui li Inner Mongolia Autonomous Region Hospital of Traditional Chinese Medicine Inner Mongolia Traditional Chinese and Mongolian Medical Research Institute Department of Pharmacy， Baotou Medical College

Hyperlipidemia is associated with many diseases and considered the main contributing factor in the development of metabolic syndrome. The traditional Mongolian medicine Dracocephalum moldavica L. (D. moldavica) is commonly consumed as a tea (non-Camellia tea) for the prevention and treatment of coronary heart disease， hypertension， atherosclerosis， and other diseases. Here， we attempted to investigate the hypolipidemic activity and mechanisms underlying the active components of D. moldavica. First， the mechanism underlying the lipid accumulation-reducing effects of the D. moldavica ethanol extract was determined using in vitro experiments， and four polar fractions were screened for activity. Then， the effect of the ethyl acetate fraction of D. moldavica (EAD) on lowering blood lipid was confirmed in vivo. The combination of network pharmacological and serum pharmacochemistry analyses showed that apigenin， luteolin， and naringenin of EAD existed in prototype form in the drug-containing serum of rats. We also determined the content of the three active ingredients in EAD. Finally， in vitro experiments showed that apigenin， luteolin， and naringenin improved oleic acid-induced lipid accumulation in HepG2 cells by regulating the PPAR signaling pathway (PPARα， CPT1， and FABP3). Our findings provide mechanistic insights and application prospects for the prevention and treatment of hypolipidemia using D. moldavica.

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Fixed-Time Sliding Mode Control With Varying Exponent Coefficient for Modular Reconfigurable Flight Arrays

引用

IEEE/CAA Journal of Automatica Sinica 2024年第2期11卷 514-528页

作者： Jianquan Yang Chunxi Yang Xiufeng zhang Jing na Faculty of Mechanical and Electrical Engineering Kunming University of Science and TechnologyKunming 650500 Yunnan International Joint Laboratory of Intelligent Control and Aoolication of Advanced Equipment Kunming 650500China IEEE

The modular system can change its physical structure by self-assembly and self-disassembly between modules to dynamically adapt to task and environmental requirements. Recognizing the adaptive capability of modular systems, we introduce a modular reconfigurable flight array(MRFA) to pursue a multifunction aircraft fitting for diverse tasks and requirements,and investigate the attitude control and the control allocation problem by using the modular reconfigurable flight array as a platform. First, considering the variable and irregular topological configuration of the modular array, a center-of-mass-independent flight array dynamics model is proposed to allow control allocation under over-actuated situations. Secondly, in order to meet the stable, fast and accurate attitude tracking performance of the MRFA, a fixed-time convergent sliding mode controller with state-dependent variable exponent coefficients is proposed to ensure fast convergence rate both away from and near the system equilibrium point without encountering the singularity. It is shown that the controller also has fixed-time convergent characteristics even in the presence of external disturbances. Finally,simulation results are provided to demonstrate the effectiveness of the proposed modeling and control strategies.

关键词： Control allocation dynamic model fixed-time stabilization modular reconfigurable flight array(MRFA) sliding mode

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Mechanism of Mingjing Granules in Treating Wet Age-Related Macular Degeneration Based on Network Pharmacology and Experimental Verification

引用

World Journal of Traditional Chinese Medicine 2024年第1期10卷 22-32页

作者： Xiao-Yu li li-na liang Wei-Jun zhang Yun Gao Qiang Chen Eye Function Laboratory Eye HospitalChina Academy of Chinese Medical SciencesBeijingChina China Evidence-Based Medicine Center for Traditional Chinese Medicine BeijingChina Center for East-West Medicine UCLA David Geffen School of MedicineLos AngelesCAUSA

Objective:To analyze the potential mechanism of Mingjing granules in the treatment of wet age-related macular degeneration(wAMD)based on the research methods of network pharmacology and molecular docking approach and to provide a new reference for the currently limited treatment of *** and Methods:We searched TCMSP,GeneCards,OMIM,PharmGkb,TTD,and DrugBank database to screen the main active ingredients of Mingjing granules and their therapeutic targets of *** network of active components and targets was constructed using Cytoscape3.6.1 software,which was also used for the topological analysis of target *** network of Protein-Protein Interactions(PPI)was mapped using the String *** also used R language to do the Gene Ontology(GO)and Kyoto Encyclopedia of Genes and Genomes(KEGG)pathway for additional *** docking studies were finished by Chemoffice,Autodock,and ***,the efficacy of the Mingjing granules was examined in animal experiments,in which we used enzyme-linked immunosorbent assay to the contents of vascular endothelial growth factor(VEGF)and matrix metalloproteinase-9(MMP-9)levels in peripheral ***:Active compounds,including quercetin,lignocaine,and kaempferol,were *** network analysis showed that tumor necrosis factor(TNF),MMP-9,epidermal growth factor(EGF),prostaglandin-endoperoxide synthase 2(PTGS2),and caspase-3(CASP3)were related to both Mingjing granules and *** and KEGG pathway analysis showed that these targets were mainly involving lipids and atherosclerosis,TNF,and interleukin-17(IL-17)signaling *** studies suggested that quercetin and luteolin can fit in the binding pocket of four target proteins(CASP3,EGF,PTGS2,and TNF).In the vivo experiment,the Mingjing granules were found to be effective on the expression of VEGF and MMP-9 in peripheral ***:This study initially reveals the multi-constituent,multi-target,and multi-pathway mechanism of action of Ming

关键词： Experimental verification Mingjing granules molecular docking network pharmacology wet age-related macular degeneration

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

An Improved Purification Method for Preparation of Basic Nickel Carbonate of High Purity via Chemical Precipitation

引用

Journal of Wuhan University of Technology(Materials Science) 2008年第3期23卷 331-333页

作者：刘昉张昭 College of Chemical Engineering Sichuan University

The adsorption mechanism of na^＋, Cl^- and other impurities on the surface of basic nickel carbonate was clarified by electric double layer model. Based on the mechanism, a new purification method was studied. The method can be described as washing-drying-rewashing-drying. The experimental results indicate that the process is very efficient to remove impurities adsorbed by the precipitate when using NiCl2 and na2CO3 as the raw materials. The finished product＇s contents of sodium and chlorine are both less than 0.01 wt%.

关键词： basic nickel carbonate purification electric double layer adsorption chemical

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Optimal Operation Strategy of Electricity-Hydrogen Regional Energy System under Carbon-Electricity Market Trading

引用

Energy Engineering 2024年第3期121卷 619-641页

作者： Jingyu li Mushui Wang Zhaoyuan Wu Guizhen Tian na zhang Guangchen liu Inner Mongolia Key Laboratory of Electrical Energy Conversion Transmission and Control Inner Mongolia University of TechnologyHohhot010080China School of Electric Power Inner Mongolia University of TechnologyHohhot010080China School of Electrical and Electronic Engineering North China Electric Power UniversityBeijing102206China

Given the“double carbon”objective and the drive toward low-carbon power,investigating the integration and interaction within the carbon-electricity market can enhance renewable energy utilization and facilitate energy conservation and emission reduction ***,further research is necessary to explore operational optimization methods for establishing a regional energy system using Power-to-Hydrogen(P2H)technology,focusing on participating in combined carbon-electricity market *** study introduces an innovative Electro-Hydrogen Regional Energy System(EHRES)in this *** system integrates renewable energy sources,a P2H system,cogeneration units,and energy storage *** core purpose of this integration is to optimize renewable energy utilization and minimize carbon *** study aims to formulate an optimal operational strategy for EHRES,enabling its dynamic engagement in carbon-electricity market *** initial phase entails establishing the technological framework of the electricity-hydrogen coupling system integrated with ***,an analysis is conducted to examine the operational mode of EHRES as it participates in carbon-electricity market ***,the system scheduling model includes a stepped carbon trading price mechanism,considering the combined heat and power generation characteristics of the Hydrogen Fuel Cell(HFC).This facilitates the establishment of an optimal operational model for EHRES,aiming to minimize the overall operating *** simulation example illustrates that the coordinated operation of EHRES in carbon-electricity market transactions holds the potential to improve renewable energy utilization and reduce the overall system *** result carries significant implications for attaining advantages in both low-carbon and economic aspects.

关键词： Regional energy system electro-hydrogen coupling carbon-electricity market step carbon trading coordination and optimization

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

High-mobility group box1 as an amplifier of immune response and target for treatment in Aspergillus fumigatus keratitis

引用

International Journal of Ophthalmology(English edition) 2020年第5期13卷 708-717页

作者： Meng-Qi Wu Cui li li-na zhang Jing lin Kun He Ya-Wen Niu Cheng-Ye Che nan Jiang Jia-Qian Jiang Gui-Qiu Zhao Department of Ophthalmology the Affiliated Hospital of Qingdao UniversityQingdao 266003Shandong ProvinceChina

AIM:To determine the roles of high-mobility group box1(HMGB1)in pro-inflammation,host immune response and its potential target for treatment in Aspergillus fumigatus(***)***:Expression of HMGB1 was tested in C57 BL/6 normal and infected *** immunostaining tested coexpression of HMGB1 with TLR4 or LOX-1.C57 BL/6 mice were pretreated with Box A or PBS and then *** scores,polymerase chain reaction,EliSA,and MPO assay were used to assess the disease *** cytometry were used to test the effect of Box A on reactive oxygen species(ROS)expression after *** stimulation in polymorphonuclear neutrophilic leukocytes(PMN).C57 BL/6 peritoneal macrophages were pretreated with Box B before *** stimulation,and MIP-2,IL-1β,TNF-α,HMGB1 and LOX-1 were *** were pretreated with Box B or Box B combined with Poly(I)(an inhibitor of LOX-1)before stimulating with ***,and MIP-2,IL-1β,TNF-α,LOX-1,p38-MAPK,p-p38-MAPK were ***:HMGB1 levels were elevated in C57 BL/6 mice after ***1 co-expressed with TLR4,and LOX-1 in infiltrated *** A vs PBS treated C57 BL/6 mice had lower clinical scores and down-regulated corneal HMGB1,MIP-2,IL-1βexpression and neutrophil *** B treatment amplified expression of MIP-2,IL-1β,TNF-α,HMGB1 and LOX-1 that induced by *** in *** to the treatment of Box B only,the protein expression of IL-1β,TNF-αshowed inhibition of Box B combined with Poly(I),which also reduced the *** protein level of LOX-1 and phosphorylation level of *** production of ***-stimulated ROS was significantly declined after Box A pretreatment in ***:Blocking HMGB1 reduces the disease response in C57 BL/6 ***1 can amplify the host immune response through p38-MAPK,and is a target for treatment of *** keratitis.

关键词： fungal keratitis HMGB1 mice macrophage polymorphonuclear neutrophilic leukocytes

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：