检索结果-南通市图书馆

Wetland and habitat dynamics in the evolving landscape of the Middle Yangtze River Basin

Journal of Geographical Sciences 2025年第1期 88-111页

作者： YANG Peng SUN Kaiya ZHU Yanchao xia Jun HUANG Heqing song Jingxia SHI xiaorui LU Xixi Hubei Key Laboratory of Regional Ecology and Environmental Change School of Geography and Information Engineering China University of Geosciences Department of Geography National University of Singapore State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan University

Wetlands play a critical role in the global environment. The Middle Yangtze River Basin(MYRB), known for its abundant wetland resources, has experienced notable changes resulting from the complex interplay of environmental factors. Therefore, we investigated the spatiotemporal characteristics of wetland ecological quality in the MYRB from 2001 to *** the random forest(RF) regression algorithm and patch-generated land-use simulation(PLUS) model, we forecasted variations in wetland habitat quality and their determinants under the Shared Socioeconomic Pathway-Representative Concentration Pathway(SSPRCP) framework from 2035 to 2095. The main findings are as follows:(1) The RF algorithm was optimal for land-use and land-cover(LULC) classification in the MYRB from 2001 to 2020,when notable changes were observed in water bodies and buildings. However, the forested area exhibited an increase and decrease of 3.9% and 1.2% under the SSP1-2.6 and SSP5-8.5 scenarios, respectively, whereas farmland exhibited a diminishing trend.(2) Wetlands were primarily concentrated in the central and eastern MYRB, with counties in the southwest exhibiting superior ecological-environmental quality from 2001 to 2020. Notably,wetland coverage revealed significantly high level, significant changes, frequent but relatively minor changes under the SSP1-2.6, SSP2-4.5, and SSP 5-8.5 scenarios, respectively.(3)Regions with lower habitat quality were primarily concentrated in urbanized areas characterized by frequent human activities, indicating a clear degradation in habitat quality across different scenarios. In conclusion, we established a foundational framework for future investigations into the eco-hydrological processes and ecosystem quality of watersheds.

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

Electrical Stimulation Enabled via Electrospun Piezoelectric Polymeric Nanofibers for Tissue Regeneration

引用

Research 2022年第4期2022卷 757-779页

作者： Guangbo xia Beibei song Jian Fang College of Textile and Clothing Engineering Soochow UniversitySuzhou 215123China Nationai Engineering Laboratory for Modern Silk Soochow UniversitySuzhou 215123China

Electrical stimulation has demonstrated great effectiveness in the modulation of cell fate in vitro and regeneration therapy in ***,the employment of electrical signal comes with the electrodes,battery,and connectors in an invasive *** tedious procedure and possible infection hinder the translation of electrical stimulation technologies in regenerative *** electromechanical coupling and flexibility,piezoelectric polymers can overcome these limitations as they can serve as a self-powered stimulator via scavenging mechanical force from the organism and external stimuli *** electrical cue mediated by electrospun piezoelectric polymeric nanofibers constitutes a promising paradigm allowing the generation of localized electrical stimulation both in a noninvasive manner and at cell ***,numerous studies based on electrospun piezoelectric nanofibers have been carried out in electrically regenerative *** this review,brief introduction of piezoelectric polymer and electrospinning technology is elucidated ***,we highlight the activating strategies(e.g.,cell traction,physiological activity,and ultrasound)of piezoelectric stimulation and the interaction of piezoelectric cue with nonelectrically/electrically excitable cells in regeneration ***,quantitative comparison of the electrical stimulation effects using various activating strategies on specific cell behavior and various cell types is ***,this review explores the present challenges in electrospun nanofiber-based piezoelectric stimulation for regeneration therapy and summarizes the methodologies which may be contributed to future efforts in this field for the reality of this technology in the clinical *** the end,a summary of this review and future perspectives toward electrospun nanofiber-based piezoelectric stimulation in tissue regenerationare elucidated.

关键词： piezoelectric fibers electrical

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

犁头草抗菌活性及其有效部位研究

引用

井冈山大学学报（自然科学版） 2023年第1期44卷 72-78页

作者：陈文芳刘文莉赵文楠宋明霞邓先清井冈山大学医学部江西吉安343009 井冈山大学中药资源和功能分子研究中心江西吉安343009

本实验将犁头草全草作为研究对象,采用不同方法对犁头草全草的有效成分进行提取,评价并比较各提取物的抗菌活性。并将粗提物按照极性高低分布在石油醚、乙酸乙酯和水相中,评价不同萃取相的抗菌活性。结果显示,乙醇回流法和甲醇冷浸法获... 详细信息

本实验将犁头草全草作为研究对象,采用不同方法对犁头草全草的有效成分进行提取,评价并比较各提取物的抗菌活性。并将粗提物按照极性高低分布在石油醚、乙酸乙酯和水相中,评价不同萃取相的抗菌活性。结果显示,乙醇回流法和甲醇冷浸法获得的提取物抗菌活性明显,而水煎煮得到的提取物几乎未见抗菌活性。此外,乙酸乙酯萃取相的抗菌作用要优于石油醚相,而水萃取相抗菌活性最小。甲醇冷浸法和乙醇回流法获得的乙酸乙酯萃取组对金葡菌ATCC 33591和金葡菌ATCC 43300的抗菌活性最佳,最小抑菌浓度(MIC)值达到0.3125 mg/mL,对其他细菌的MIC值在0.3125~1.25 mg/mL之间;而其他萃取组分对金葡菌、枯草芽孢杆菌、铜绿假单胞菌以及耐药菌的MIC值大约在1.25~5 mg/mL之间。本研究确定了犁头草具有广谱的抗菌活性,尤其对耐甲氧西林金葡菌效果较好。研究发现乙醇回流与甲醇冷浸法可用于犁头草的抗菌物质提取,且它的抗菌有效部位为乙酸乙酯萃取相。

关键词：犁头草提取物有效部位抗菌活性耐药菌

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

Targeting Haemaphysalis longicornis serpin to prevent tick feeding and pathogen transmission

引用

Insect Science 2024年第3期31卷 694-706页

作者： Tingting Feng Hao Tong Qianqian Zhang Zhihao ming Zhenyu song xia Zhou Jianfeng Dai Institute of Biology and Medical Sciences Jiangsu Key Laboratory of Infection and ImmunitySoochow UniversitySuzhouJiangsu ProvinceChina School of Biology and Basic Medical Science Suzhou Medical College of Soochow UniversitySuzhouJiangsu ProvinceChina

Serine proteinase inhibitors(serpins),identified from the hard tick Haemaphysalis longicornis of China,play significant roles in various animal physiological *** this study,we showed that *** serpins(Hlserpin-a and Hlserpin-b)were induced during blood-feeding in nymph ticks and exhibited anticoagulation activity in *** Hlserpins through RNA interference(RNAi)significantly impaired tick *** of mice with recombinant Hlserpins or passive transfer of Hlserpin antiserum significantly curtails the efficacy of tick ***,the transmission of the Langat virus(LGTV)from ticks to mice witnessed a substantial decrease when Hlserpins were *** findings suggest that inhibiting Hlserpins can hamper tick engorgement and pathogen transmission,indicating the potential of Hlserpins as a vaccine to countertick-borne diseases.

关键词： feeding LGTV serpin TBEV tick

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

Synthesis of Zinc Blende CdTe Nanocrystals and Facile Shape Conversion from Multipods to Dot-shaped Particles

引用

Chemical Research in Chinese Universities 2011年第5期27卷 739-741页

作者： SHEN Huai-bin XING ming LI Lin-song WANG Hong-zhe CHEN xia College of Life Science Jilin University Changchun 130012 P. R. China Key Laboratory for Special Functional Materials Ministry of Education Henan University Kaifeng 475004 P. R. China

Branched CdTe nanocrystals with zinc blende structure were directly synthesized in the early growth stage at a high initial concentration of cadmium precursor and a high molar ratio of Cd precursor to Te precuesor. Activation of the cadmium precursor by octadecylamine was found to be critical for the formation of branched CdTe nanocrystals. Furthermore, these as-prepared CdTe nanocrystals can evolve into nearly monodisperse dots through Ostwald ripening and still keep strong photoluminescence. These results manifest a new route to synthesize branch- and dot-shaped CdTe nanocrystals with zinc blende structure.

关键词： CdTe Zinc blende Branch-shaped nanocrystal

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

绿色木霉和枯草芽孢杆菌对番茄幼苗促生效应的研究

引用

吉林师范大学学报（自然科学版） 2021年第3期42卷 100-104页

作者：宋明霞张晓婷樊航张紫瑶周晓馥吉林师范大学吉林省植物资源科学与绿色生产重点实验室吉林四平136000 通化师范学院食品科学与工程学院吉林通化134000

为深入研究生防菌对植物促生作用的机理,提高作物产量,探究了绿色木霉和枯草芽孢杆菌对番茄幼苗的促生效应,并进一步探讨了两株菌的协同促生作用.采用灌根法共设置6种处理:绿色木霉处理、枯草芽孢杆菌处理、混合菌液处理、PD液体培养基... 详细信息

为深入研究生防菌对植物促生作用的机理,提高作物产量,探究了绿色木霉和枯草芽孢杆菌对番茄幼苗的促生效应,并进一步探讨了两株菌的协同促生作用.采用灌根法共设置6种处理:绿色木霉处理、枯草芽孢杆菌处理、混合菌液处理、PD液体培养基处理、LB液体培养基处理、PD+LB液体培养基处理.通过盆栽实验,对不同处理下番茄幼苗的多种生理生化指标以及诱导土壤养分矿化的能力进行测量.结果表明,绿色木霉、枯草芽孢杆菌、混合菌液均对番茄幼苗有促生作用,其中混合菌液对番茄幼苗促生作用更加显著.因此,本研究为开发复合微生物菌肥提供了一种新的思路.

关键词：番茄幼苗绿色木霉枯草芽孢杆菌促生效应

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

井冈山产厚朴总生物碱含量分析

引用

井冈山大学学报（自然科学版） 2015年第1期36卷 100-102页

作者：曾红宋明霞梁兆昌邓先清黄玉珊井冈山大学医学院江西吉安343009

目的分析评价井冈山产厚朴不同部位总生物碱含量。方法采用高氯酸滴定法对井冈山产同一植株厚朴的干皮、枝皮、根皮、花、叶部位的总生物碱含量进行测定,同时比较了厚朴干皮、枝皮、根皮生品和炮制品生物碱含量。结果厚朴干皮、枝皮、... 详细信息

目的分析评价井冈山产厚朴不同部位总生物碱含量。方法采用高氯酸滴定法对井冈山产同一植株厚朴的干皮、枝皮、根皮、花、叶部位的总生物碱含量进行测定,同时比较了厚朴干皮、枝皮、根皮生品和炮制品生物碱含量。结果厚朴干皮、枝皮、根皮、花、叶总生物碱含量分别为4.6053±0.0814、5.4734±0.1047、6.5940±0.0715、7.9546±0.0686、7.2220±0.0776mg/g,炮制品生物碱含量较生品低。结论同一植物厚朴花中生物碱含量最高,而传统入药部位干皮中最低,且厚朴皮应以生品入药。

关键词：厚朴生物碱含量分析

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

Theoretical Study of the Photochemical Reaction Mechanism of Bicyclo[4.1.0]heptane

引用

Chemical Research in Chinese Universities 2006年第4期22卷 520-523页

作者： WANG Yan-xia YE song Department of Chemistry Yunnan University Kunming 650091 P. R. China

The photochemical reaction of bicyclo[4.1.0]heptane was studied at the complete active space SCF（CASSCF） level with a 6-31G^＊ basis set. A muhireference MP2 algorithm that has been implemented in the Gaussian program was used to correct the energetics for the dynamic correlation. Starting from the Franck-Condon excitation of bicyclo [ 4.1.0 ] heptane, the reaction is via two bonds＇ breakage to give rise to 1,6-heptdiene. One internal conversion （IC） and two intersystem crossing points（ISC） were located and are discussed separately. The reaction proceeds to its own characteristic product on the ground state.

关键词： CASSCF Intersystem crossing Photochemical reaction mechanism Internal conversion Bicyclo-[ 4.1.0 ] heptane 1-6 Heptadiene

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

Surface roughness modulated resistivity in copper thin films

引用

Science China(Physics,Mechanics & Astronomy) 2018年第10期61卷 70-77页

作者： HongKang song Ke xia Jiang xiao Department of Physics Beijing Normal University Beijing 100875 China Department of Physics and State Key Laboratory of Surface Physics Fudan University Shanghai 200433 China Collaborative Innovation Center of Advanced Microstructures Nanjing 210093 China

The surfaces of metallic thin films are never flat. The resistivity in thin films is very different from that in bulk because of the unavoidable rough surfaces. In this study, we apply a quantum-mechanical method to study the resistivity in metallic thin *** resulting resistivity formula for metallic thin films merely involves two parameters: bulk relaxation time and surface roughness. We use the formula to fit a large number of experimental data sets for copper thin films obtained using different growing methods. With an additional tuning parameter for calibrating the film thickness, the quantum formula can provide a universal fitting to most data with a satisfactory precision, regardless of their growing methods or data source.

关键词： thin film thickness dependent resistivity surface roughness

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

Intergenic spacer 1(IGS1) polymorphism map: A marker for the initial classification of cultivated Lentinula edodes strains in China

引用

Journal of Integrative Agriculture 2018年第11期17卷 2458-2466页

作者： song xiao-xia ZHAO Yan song Chun-yan LI Chuan-hua CHEN ming-jie HUANG Jian-chun TAN Qi Institute of Edible Fungi Shanghai Academy of Agricultural Sciences

China is currently the world＇s leading producer of Lentinula edodes and owns many cultivated strains of this species. This study was performed in order to investigate intergenic spacer I （IGS1） polymorphism and classification among 49 popular cultivated strains. The great majority of the 49 strains possessed two different IGS1 sequences, with distinct lengths and homologies. Based on the length and homology of the IGS1 sequences of the 49 strains, the strains were classified into two groups： A and B. Group A was subdivided into six subgroups. Forty-seven strains were homozygous or heterozygous among these six subgroups in group A, Cr01 was heterozygous between A and B, and Guangxiang 9 was homozygous in group B. An IGS1 polymorphism map of each cultivated L. edodes strain is reported for the first time and could be used as a marker for the initial classification and management of cultivated L. edodes strains in China.

关键词： Lentinula edodes strain intergenic spacer polymorphism genotype

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

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：