检索结果-南通市图书馆

Relative Contributions of Spatial and Environmental Processes and Biotic Interactions in a Soil Collembolan Community

引用

Chinese Geographical Science 2015年第5期25卷 582-590页

作者： sha di GAO Meixiang SUN Xin WU Donghui ZHANG Xueping Key Laboratory of Remote Sensing Monitoring of Geographic Environment College of Heilongjiang Province Harbin Normal University College of Geographical Science Harbin Normal University Key Laboratory of Wetland Ecology and Environment Northeast Institute of Geography and Agroecology Chinese Academy of Sciences

Understanding the underlying processes of how communities are structured remains a central question in community ecology. However, the mechanisms of the soil animal community are still unclear, especially for communities on a small scale. To evaluate the relative roles of biotic interactions and environmental and spatial processes in a soil collembolan community, a field experiment was carried out on a small scale(50 m) in the farmland ecosystem of the Sanjiang Plain, Northeast China. In August and October, 2011, we took 100 samples each month in a 50 m × 50 m plot using a spatially delimited sampling design. Variation partitioning was used to quantify the relative contributions of the spatial and environmental variables. A null model was selected to test for the non-randomness pattern of species co-occurrence and body size in assemblages of collembolans and to test whether the pattern observed was the result of environmental or biotic processes that structured the community on a small scale. The results showed that large variance was accounted for by spatial variables(18.99% in August and 21.83% in October, both were significant). There were relatively lower effects of environmental variation(3.56% in August and 1.45% in October, neither was significant), while the soil water content, soil p H and soybean height explained a significant portion of the variance that was observed in the spatial pattern of the collembolan community. Furthermore, the null model revealed more co-occurrence than expected by chance, suggesting that collembolan communities had a non-random co-occurrence pattern in both August and October. Additionally, environmental niche overlap and the body size ratio of co-occurrence showed that interspecific competition was not influential in collembolan community structuring. Considering all of the results together, the contributions of spatial and environmental processes were stronger than biotic interactions in the small-scale structuring of a soil c

关键词： spatial process environmental filtering biotic interactions variation partitioning small scale collembolan community

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

Hofmeister Effect on Thermo-responsive Poly(N-isopropylacrylamide)Hydrogels Grafted on Macroporous Poly(vinyl alcohol) Formaldehyde Sponges

引用

Chinese Journal of Polymer Science 2020年第3期38卷 257-267,I0006页

作者： Kai Shi di sha Jiu-Duo Xu Xu Yang Bao-Long Wang Yan-Xiong Pan Xiang-Ling Ji State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China University of Chinese Academy of Sciences Beijing 100049China

In this work,the Hofmeister effects of nine kinds of anions at different concentrations on the lower critical solution temperature(LCST)of the macroporous thermo-responsive poly(N-isopropylacrylamide)grafted poly(vinyl alcohol)formaldehyde(PVF-g-PNIPAM)hydrogels are investigated with differential scanning calorimetry(DSC).Four kinds of anions with strong hydration,including CO3^2–,SO4^2–,S2 O3^2–,and F^–,and four kinds of anions with weak hydration,including Br^–,NO3^–,I^–,and ClO4^–,and Cl^–as a medium anion are systematically studied and found to demonstrate the effects of the residual hydroxyl groups and network structure of PVF on the LCST values of PVF-g-PNIPAM hydrogels in comparison with that of neat *** the one hand,the existence of hydroxyl groups on PVF backbone promotes the solubility of grafted PNIPAM due to their hydrophilicity and hydrogen-bond interactions with *** the other hand,the network structure of as-prepared samples restricts free movements of grafted PNIPAM chains,which results in the increase of LCST *** addition,the difference of grafting percentage also influences the variation of LCST values of PVF-g-PNIPAM hydrogels under salt concentration.

关键词： Hofmeister effect Thermo-responsive PVF-g-PNIPAM Hydroxyl groups Network structure

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

Germinated brown rice relieves hyperlipidemia by alleviating gut microbiota dysbiosis

引用

Journal of Integrative Agriculture 2023年第3期22卷 945-957页

作者： REN Chuan-ying ZHANG shan HONG Bin GUAN Li-jun HUANG Wen-gong FENG Jun-ran sha di-xin YUAN di LI Bo JI Ni-na LIU Wei LU Shu-wen Food Processing Research Institute Heilongjiang Academy of Agricultural SciencesHarbin 150086P.R.China Heilongjiang Province Key Laboratory of Food Processing Harbin 150086P.R.China Safety and Quality Institute of Agricultural Products Heilongjiang Academy of Agricultural SciencesHarbin 150086P.R.China Soybean Research Institute Heilongjiang Academy of Agricultural SciencesHarbin 150086P.R.China The Second Affiliated Hospital Harbin Medical UniversityHarbin 150086P.R.China

Hyperlipidemia is a frequent metabolic disorder that is closely associated with diet. It is believed that brown rice, containing the outer bran layer and germ, is beneficial for the remission of hyperlipidemia. This study established a rat model of hyperlipidemia by feeding a high-fat diet. The hypolipidemic potential of germinated brown rice(Gbrown) and germinated black rice(a germinated black-pigmented brown rice, Gblack) were explored in the model rats, mainly in the aspects of blood lipids, lipases, apolipoproteins, and inflammation. The gut microbiota in hyperlipidemic rats receiving diverse dietary interventions was determined by 16S rDNA sequencing. The results showed that the intervention of Gbrown/Gblack alleviated the hyperlipidemia in rats, evidenced by decreased TC, TG, LDL-C, and apolipoprotein B, and increased HDL-C, HL, LPL, LCAT, and apolipoprotein A1. Gbrown/Gblack also weakened the inflammation in hyperlipidemia rats, evidenced by decreased TNF-α, IL-6, and ET-1. In addition, 16S rDNA sequencing revealed that the diet of Gbrown/Gblack elevated the abundance and diversity of gut microbiota in hyperlipidemia rats. At the phylum level, Gbrown/Gblack decreased Firmicutes, increased Bacteroidetes, and decreased the F/B ratio in hyperlipidemia rats. At the genus level, Gbrown/Gblack decreased Streptococcus and increased Ruminococcus and Allobaculum in hyperlipidemia rats. Some differential microbial genera relating to lipid metabolism were also determined, such as the Lachnospira and Ruminococcus in the Gblack group, and the Phascolarctobacterium, Dorea, Turicibacter, and Escherichia-Shigella in the Gbrown group. Notably, the beneficial effect of Gblack was stronger than Gbrown. To sum up, the dietary interventions of Gbrown/Gblack contributed to the remission of hyperlipidemia by alleviating the dysbiosis of gut microbiota.

关键词： hyperlipidemia germination brown rice black rice gut microbiota

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

Farmers'Ideological and Political Education under the Background of Rural Revitalization Strategy

引用

Asian Agricultural Research 2021年第8期13卷 14-16页

作者： di sha Weiguang PAN College of Economics and Management Zhejiang Agriculture and Forestry UniversityHangzhou 311300China Research Academy for Rural Revitalization of Zhejiang Province Zhejiang Agriculture and Forestry UniversityHangzhou 311300China

As a new way to solve the issues of agriculture,rural areas and farmers in China,the strategy of rural revitalization puts forward new requirements for the ideological and political education of ***,in the present stage,the ideological and political education of Chinese farmers is often compromised in the process of rural traditional culture,and there is also pride and prejudice in the cadres for"agriculture,rural areas and farmers".For the ideological and political education of Chinese farmers,it is necessary to pay more attention to the social orientation of farmers and the value orientation contained in the construction of farmers'ideological and political construction,and reconstruct the system of Chinese farmers'ideological and political education based on this orientation and value selection.

关键词： Rural revitalization strategy Farmer Ideological and political education

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

两种数字生命的Swarm仿真研究

引用

系统仿真学报 2007年第4期19卷 928-933页

作者：冯迪砂吴斌西南科技大学信息工程学院四川绵阳621010

数字生命的概念是托马斯·雷最早在计算机上模拟实验提出的,以此为指导,介绍了复杂适应系统、Agent建模等理论知识,利用Swarm仿真平台构建了两种异类数字生命及共同生存的环境,模拟自然界生命体最基础的繁殖歼灭等生命现象,通过可视化... 详细信息

数字生命的概念是托马斯·雷最早在计算机上模拟实验提出的,以此为指导,介绍了复杂适应系统、Agent建模等理论知识,利用Swarm仿真平台构建了两种异类数字生命及共同生存的环境,模拟自然界生命体最基础的繁殖歼灭等生命现象,通过可视化窗口观察生命体个体及群体间的交互行为,得到结果的不可测性和突现性,实现了两种数字生命的Swarm仿真。

关键词：斯沃姆仿真平台数字生命主体建模复杂适应系统突现

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

Stability Prediction in Smart Grid Using PSO Optimized XGBoost Algorithm with Dynamic Inertia Weight Updation

引用

Computer Modeling in Engineering & Sciences 2025年第1期142卷 909-931页

作者： Adel Binbusayyis Mohemmed sha Department of Software Engineering College of Computer Engineering and Sciences in Al-Kharj Prince Sattam Bin Abdulaziz UniversityAl-Kharj11942Saudi Arabia

Prediction of stability in SG(Smart Grid)is essential in maintaining consistency and reliability of power supply in grid *** the fluctuations in power generation and consumption patterns of smart cities assists in effectively managing continuous power supply in the *** also possesses a better impact on averting overloading and permitting effective energy *** though many traditional techniques have predicted the consumption rate for preserving stability,enhancement is required in prediction measures with minimized *** overcome the complications in existing studies,this paper intends to predict stability from the smart grid stability prediction dataset using machine learning *** accomplish this,pre-processing is performed initially to handle missing values since it develops biased models when missing values are mishandled and performs feature scaling to normalize independent data ***,the pre-processed data are taken for training and *** that,the regression process is performed using Modified PSO(Particle Swarm Optimization)optimized XGBoost Technique with dynamic inertia weight update,which analyses variables like gamma(G),reaction time(tau1–tau4),and power balance(p1–p4)for providing effective future stability in *** PSO attains optimal solution by adjusting position through dynamic inertial weights,it is integrated with XGBoost due to its scalability and faster computational speed *** hyperparameters of XGBoost are fine-tuned in the training process for achieving promising outcomes on *** results are measured through evaluation metrics such as MSE(Mean Square Error)of 0.011312781,MAE(Mean Absolute Error)of 0.008596322,and RMSE(Root Mean Square Error)of 0.010636156 and MAPE(Mean Absolute Percentage Error)value of 0.0052 which determine the efficacy of the system.

关键词： Smart Grid machine learning particle swarm optimization XGBoost dynamic inertia weight update

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

贫困农村大龄未婚男青年的婚恋窘境分析——基于河南S村的实地研究

引用

河北大学学报（哲学社会科学版） 2016年第3期41卷 122-127页

作者：贾志科沙迪河北大学政法学院河北保定071002

随着性别失衡社会影响与后果的逐步显现,贫困农村大龄未婚男青年面临婚恋窘境,俨然已经成为一个不容回避的现实问题。选择河南S村作为调研地,对该村20位大龄未婚男青年进行深入访谈,结果发现:该村大龄未婚男青年扎堆现象明显,面临严重... 详细信息

随着性别失衡社会影响与后果的逐步显现,贫困农村大龄未婚男青年面临婚恋窘境,俨然已经成为一个不容回避的现实问题。选择河南S村作为调研地,对该村20位大龄未婚男青年进行深入访谈,结果发现:该村大龄未婚男青年扎堆现象明显,面临严重择偶拥挤;婚姻攀比盛行,高额婚姻支付较为普遍;屡次遭受相亲失败,承受较大精神压力;长期处于单身状态,择偶标准大大降低。导致该村大龄未婚男青年面临如此窘境的原因主要集中在地理位置环境、家庭经济条件、自身文化水平以及农村传统观念等方面,为此,需要从加快农村经济建设、大力发展交通事业、强化综合技能培训、平衡男女性别比例以及加强青年心理疏导等方面入手,以缓解农村大龄未婚男青年的择偶难题。

关键词：社会关系社会问题贫困农村婚恋大龄未婚择偶观

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

巴马小型猪动物模型在医学领域的研究进展

引用

中国畜牧兽医 2017年第4期44卷 1128-1134页

作者：邹迪莎于健桂林医学院附属医院肾内科桂林541001 桂林医学院附属医院内分泌科桂林541001

巴马小型猪是中国原产地闭锁繁殖的优质品种,具有遗传稳定性、理想的毛色分布、体型小、多产性、饲养要求低、抗病力强等优势,且在生理学、解剖结构、药物代谢、生化指标和疾病发生机制等方面与人类相似,已用于心血管、皮肤整形、内分... 详细信息

巴马小型猪是中国原产地闭锁繁殖的优质品种,具有遗传稳定性、理想的毛色分布、体型小、多产性、饲养要求低、抗病力强等优势,且在生理学、解剖结构、药物代谢、生化指标和疾病发生机制等方面与人类相似,已用于心血管、皮肤整形、内分泌及代谢、消化、口腔医学、异种移植、中医、麻醉学、神经系统等广泛医学领域的研究,建立了心肌缺血、冠脉微栓塞、卵圆孔未闭、动脉粥样硬化、皮肤创伤、经皮给药、代谢综合征、糖尿病及其并发症、梗阻性黄疸、慢性胰腺炎、肝硬化、肝脏射频消融、牙周组织炎症、下颌骨缺损、异种器官/细胞移植、中医征候、手术麻醉、脑缺血、支架植入、休克等一系列类似于人类疾病的动物模型,表明巴马小型猪作为理想的试验动物在生物医学研究中具有广阔的应用前景。作者综述了巴马小型猪作为试验动物在各医学领域的应用进展,了解现有巴马小型猪疾病模型的种类、构建方法及病理特征,有助于进一步探索具体的病因、发病机制、并发症和防制手段等,为拓展研究范围、提高医学水平奠定了科学基础。

关键词：巴马小型猪动物模型医学领域

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

Double-blinded,randomized clinical trial of Gegen Qinlian decoction pinpoints Faecalibacterium as key gut bacteria in alleviating hyperglycemia

引用

Precision Clinical Medicine 2024年第1期7卷 21-33页

作者： Zezheng Gao Wenhui Zhang Lisha He Han Wang Yufei Li Xiaotian Jiang sha di Xinmiao Wang Xuan Zhang Lin Han Yanwen Liu Chengjuan Gu Mengyi Wu Xinhui He Lei Cheng Jun Wang Xiaolin Tong Linhua Zhao Institute of Metabolic diseases Guang'anmen HospitalChina Academy of Chinese Medical SciencesBeijing 100053China Department of Endocrinology Guang anmen HospitalChina Academy of Chinese Medical SciencesBeijing 100053China CAS Key Laboratory of Pathogenic Microbiology and Immunology Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Chengdu University of Traditional Chinese Medicine Chengdu 611137China School of Chinese Materia Medica Beijing University of Chinese MedicineBeijing 100029China Centre for Evidence-Based Chinese Medicine Beijing University of Chinese MedicineBeijing 100029China Department of Endocrinology Affiliated Hospital of Changchun University of Chinese MedicineChangchun 13000oChina Biologicals Science and Technology Institute Baotou Teacher's CollegeBaotou 014030China Department of Endocrinology Zhengzhou T.C.M.HospitalZhengzhou 450007China Shenzhen Hospital Guangzhou University of Chinese Medicine(Futian)Shenzhen 518000China Department of Cardiology Guangdong Provincial Hospital of Chinese MedicineGuangzhou 510120China Department of Cardiology Yunnan Provincial Hospital of Traditional Chinese MedicineKunming 650000China Key Laboratory of Development and Application of Rural Renewable Energy Biogas Institute of Ministry of Agriculture and Rural AffairsChengdu 610041China

Background:Accumulating evidence suggests that metabolic disorders,including type 2 diabetes mellitus(T2DM),can be treated with traditional Chinese medicine formulas,such as the Gegen Qinlian decoction(GQD).This study elucidates the mechanisms by which gut microbes mediate the anti-diabetic effects of ***:We conducted a double-blind randomized clinical trial involving 120 untreated participants with *** the 12-week intervention,anthropometric measurements and diabetic traits were recorded every 4 *** microbiota and serum metabolites were measured before and after the intervention using 16S rDNA sequencing,liquid chromatography-mass spectrometry,and Bio-Plex ***:Anti-diabetic effects were observed in the GQD group in the human ***,glycated hemoglobin,fasting plasma glucose,and two-hour postprandial blood glucose levels were significantly lower in the GQD group than in the placebo ***,Faecalibacterium was significantly enriched in the GQD group,and the short-chain fatty acid levels were higher and the serum inflammation-associated marker levels were lower in the GQD group compared to the placebo ***,Faecalibacterium abundance negatively correlated with the levels of serum hemoglobin,fasting plasma glucose,and pro-inflammatory ***,the diabetes-alleviating effect of Faecalibacterium was confirmed by oral administration of Faecalibacterium prausnitzi(DSMZ 17677)in ***:GQD improved type 2 diabetes primarily by modulating the abundance of Faecalibacterium in the gut microbiota,alleviating metabolic disorders and the inflammatory state.

关键词： double-blinded randomized controlled trial type 2 diabetes mellitus Gegen Qinlian decoction Faecalibacterium metabolic disorders inflammation

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

医学工程科在医疗器械使用监管中的作用研究

引用

中国医疗器械信息 2020年第15期26卷 155-157页

作者：沙迪吉林省吉林中西医结合医院吉林吉林132001

分析医疗器械使用和监管现状,发现问题,发挥医学工程科在医疗器械监管中的作用,起到提高人员自觉性、提升监管执行能力、增强信息化管理等方面的作用。针对医疗器械管理过程中存在的问题进行总结归纳,对相关问题提出实用性修改意见,起... 详细信息

分析医疗器械使用和监管现状,发现问题,发挥医学工程科在医疗器械监管中的作用,起到提高人员自觉性、提升监管执行能力、增强信息化管理等方面的作用。针对医疗器械管理过程中存在的问题进行总结归纳,对相关问题提出实用性修改意见,起到良好的监管作用。医学工程科应结合实际问题,积极寻找有效的解决方法,并建立长效的管理机制,全面提高管理水平,起到良好的监管作用。

关键词：医学工程科医疗器械监管

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：