检索结果-南通市图书馆

Mapping the spatial distribution of fossil geothermal manifestations and assessment of geothermal potential of the Tangyin rift,Southeast of Taihang Mountain in China

引用

Journal of Mountain Science 2022年第8期19卷 2241-2259页

作者： MAHWA Joshua LI da-jiang PING Jian-hua LENG Wei TANG Jia-bo SHAO Dong-yun School of Water Conservancy and Engineering Zhengzhou UniversityZhengzhou 450001China Department of Geology College of Earth ScienceUniversity of DodomaBox 11090DodomaTanzania Power China Henan Engineering CO. LTDNo.30 Changchun RoadHigh and New Technology Industries Development ZoneZhengzhou450001China Geothermal and Ecological Geology Research Centre Zhengzhou UniversityZhengzhou 450001China College of Ecology and Environment Zhengzhou UniversityZhengzhou 450001China Power China Geothermal Development CO. LTDNo.30 Changchun RoadHigh and New Technology Industries Development ZoneZhengzhou450001China

The spatial prediction of geothermal sites along the southeast side of Taihang Mountain in the Tangyin rift is a critical goal in the development of renewable energy resources in cities such as Hebi in Henan province,which has significant potential for geothermal energy production due to the existence of deep faults and Cenozoic *** study aimed to delineate areas with high geothermal manifestations for detailed geothermal exploration and well-test *** define favorable zones for geothermal potentiality,multi-source datasets were chosen to generate evidence thematic layers that demonstrate the distribution of geothermal anomalies such as geologic maps,structural maps,Land Surface Temperature maps(LST),and hydrothermal mineral alterations *** remote sensing and Geographical Information System(GIS)approaches were integrated to map fossil geothermal manifestations and appraise the promising geothermal zones from Landsat 8 OLI/TIRS and Advanced Spaceborne Thermal Emission and Reflection Radiometer-Digital Elevation Model(ASTER-DEM)dataset using the Analytic Hierarchy Process(AHP),which is one of the Mult-criteria Decision Making *** show LST values ranging from 22.6℃ to 45.4℃,with the highest values found along the faults and volcanic *** hydrothermal alteration minerals discriminated from band ratios of 4/2,6/5,and 6/7 for iron oxide,ferrous minerals,and clays reveal the presence of high amount of montmorillonite and illite minerals along the faults and volcanoes which are related to hot fluid circulation from *** analysis shows that the major structural trend follows the NNE Tangdong and Tangxi faults,with high density on the west side of the Tangxi fault where there is good exposure of outcrop but less fault density on the east side due to sedimentation in a low land which may conceal geological ***,all the thematic layers of geothermal factors were reclassified,ranked,and integrated by the weight o

关键词： Geothermal potential Remote Sensing GIS Geological structures Alteration minerals Land surface temperature

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

Cyclic load testing of pre-stressed rock anchors for slope stabilization

引用

Journal of Mountain Science 2016年第1期13卷 126-136页

作者： ZHENG da LIU Fang-zhou JU Neng-pan FROST J.david HUANG Run-qiu State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of Technology School of Civil and Environmental Engineering Georgia Institute of Technology

The objective of this research was to assess the characteristics of seismic induced damage and the deformation patterns of pre-stressed cement-grouted cables that are used for rock slope stabilization projects subjected to quasi-static cyclic *** experimental configuration includes the installation of 15 pre-stressed cables in a slope model made of concrete blocks(theoretically rigid rock mass) on top of a pre-existing sliding *** study showed that:(i) The pre-stressed cables exhibited great seismic *** displacement of the model blocks was observed after the complete loss of the initial pre-stress load under continued applied cyclic loads and exceedance of the state of equilibrium,which implies the higher the initial pre-stress load,the better the seismic performance of the rock anchor;(ii) The failure of the pre-stressed cables was due to fracture at the connection of the tendons and cable heads under cyclic *** sequence of failure had a distinct *** was first observed at the upper row of cables,which experienced the most severe damage,including the ejection of cable *** evidence of de-bonding was observed during the cyclic loading;(iii) The stress distribution of the bond length for pre-stressed cables was highly *** stress concentrations were observed at both the fixed end and the free end of the bond length both before and immediately after the state of equilibrium is *** results obtained can be used to evaluate the overall performance of pre-stressed rock anchors subject to seismic loading and their potential as rockfall prevention and stabilization measures.

关键词： stabilization rock sliding stressed cable blocks anchor ejection implies experienced

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

Somatic embryogenesis and plant regeneration in Betula platyphalla

引用

Journal of Forestry Research 2021年第3期32卷 937-944页

作者： Jingli Yang da Yang Wanqiu Lü Xin Zhang Miaomiao Ma Guifeng Liu Jing Jiang Chenghao Li State Key Laboratory of Tree Genetics and Breeding Northeast Forestry UniversityHarbin 150040People’s Republic of China

Betula platyphylla is a native tree species in northern China that has high economic and medicinal *** developed an efficient protocol for the induction of somatic embryogenesis in *** from immature zygotic embryos and assessed the effects of explant type,genotype,and plant growth regulators(PGRs)on embryogenic callus *** the various explants evaluated,embryogenic callus was only produced from mature and immature zygotic embryos on medium with added 2,4-dichlorophenoxyacetic acid(2,4-D).Supplementation of 2,4-D-containing medium with cytokinins increased the frequency of embryogenic callus *** the 20 days after pollination,immature zygotic embryos that had been collected in mid-May yielded embryogenic tissue at the highest frequency(16.8%)when cultured on half-strength MS medium supplemented with 2.0 mg L^(-1)2,4-D and 0.2 mg L^(-1)6-benzylaminopurine(6-BA).The process of proliferation of embryogenic callus,somatic embryo formation,and subsequent plantlet conversion occurred under optimal culture *** regenerated plants weretransplanted to soil,95%of them developed normally and grew *** somatic embryogenesis system required 3–4 months for the regeneration of *** plantlets from immature zygotic embryos.

关键词： Betula platyphalla Somatic embryo Embryogenic callus Immature embryo

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

2010—2020年青海省人口经济环境空间格局分异研究

引用

内蒙古科技与经济 2024年第8期 3-9页

作者：杨林星达福文李金平尹琰琰李传威青海师范大学地理科学学院青海西宁810000

人口、经济和环境协调发展是青海省协调发展及高质量发展的重要途径和关键点。文章以青海省45个县(市、区)作为研究对象,构建基于熵权法和物理耦合模型的人口经济环境协调度模型,比较分析人口、经济与环境系统耦合协调度的时空演变,计... 详细信息

人口、经济和环境协调发展是青海省协调发展及高质量发展的重要途径和关键点。文章以青海省45个县(市、区)作为研究对象,构建基于熵权法和物理耦合模型的人口经济环境协调度模型,比较分析人口、经济与环境系统耦合协调度的时空演变,计算不同系统发展程度的空间莫兰指数,并为青海省各区县未来的发展规划提出了建议。研究表明:青海省45个区县的人口、经济与生态环境系统的协调发展状况在2010-2020年有所改善;青海省东部地区各区县之间人口经济环境3个子系统的耦合协调度东部地区高于西部、南部地区;全省各区县人口、经济、环境系统发展的空间自相关程度较低且不显著,但是各县(市、区)3个子系统耦合协调性存在显著且微弱的正自相关关系,地区间协同发展的潜力有待进一步提高。

关键词：青海省县域人口经济环境空间格局综合发展水平耦合协调发展

来源：

维普期刊数据库博看期刊

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

Promotion and Inhibition of Ruminal Epithelium Growth by Butyric Acid and Insulin-Like Growth Factor-1(IGF-1) in dairy Goats

引用

Journal of Integrative Agriculture 2014年第9期13卷 2005-2009页

作者： LIU da-cheng ZHOU Xiang-li LIU Guo-juan GAO Min HU Hong-lian College of Veterinary Medicine Inner Mongolia Agricultural University Key Laboratory of Clinical Diagnosis and Treatment Technology in Animal Disease Ministry of Agriculture Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences

Isolated ruminal epithelia from caudal blind sacs of dairy goats were incubated with butyrate and insulin-like growth factor-1（IGF-1） at different concentrations. Proportions of ruminal epithelium in different phases of the cell division cycle were determined by flow cytometric analysis. The proportion of epithelial cells in S phase and G2-M phase（PS＆G2-M） increased significantly（P〈0.01） whereas the proportion of epithelial cells in G0-G1 phase（PG0-G1） decreased after incubation with IGF-1. PS＆G2-M decreased whereas PG0-G1 increased markedly（P〈0.01） after incubation with sodium butyrate. PS＆G2-M incubated with IGF-1 and butyrate sodium together increased more than that incubated with IGF-1 alone; PG0-G1, however, decreased significantly（P〈0.01）. Our results indicate that IGF-1 enhances whereas sodium butyrate inhibits the proliferation of rumen epithelial cells. Furthermore, butyrate and IGF-1, together, have a synergic effect on the proliferation of rumen epithelium.

关键词： butyrate IGF-1 rumen epithelium

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

Composite Sophora Colon-Soluble Capsule Ameliorates DSS-Induced Ulcerative Colitis in Mice via Gut Microbiota-Derived Butyric Acid and NCR+ ILC3

引用

Chinese Journal of Integrative Medicine 2023年第5期29卷 424-433页

作者： CHEN Ming-jun FENG Yang GAO Lu LIN Ming-xiong WANG Shi-da TONG Zhan-qi Medical School of Chinese People's Liberation Army Beijing(100853)China Department of Traditional Chinese Medicine The Second Medical Center&National Clinical Research Center of Geriatric DiseasesChinese People's Liberation Army General HospitalBeijing(100853)China Institute of Military Cognition and Brain Sciences Academy of Military Medical SciencesAcademy of Military SciencesBeijing(100850)China

Objective: To investigate the effects of composite Sophora colon-soluble Capsule(CSCC) on gut microbiota-mediated short-chain fatty acids(SCFAs) production and downstream group 3 innate lymphoid cells(ILC3s) of dextran sulfate sodium(DSS)-induced ulcerative colitis(UC) mice model. Methods: The main components of CSCC were analyzed by hybrid ultra-high-performance liquid chromatography ion mobility spectromety quadrupole time-of-flight mass spectrometry(UHPLC-IM-QTOF/MS). Twenty-four male BALB/c mice were randomly divided into 4 groups(n=6) by using a computer algorithm-generated random digital, including control, DSS model, mesalazine, and CSCC groups. A DSS-induced colitis mice model was established to determine the effects of CSCC by recording colonic weight, colonic length, index of colonic weight, and histological colonic score. The variations in ILC3s were assessed by immunofluorescence and flow cytometry. The results of gut microbiota and SCFAs were acquired by 16s r DNA and gas chromatography-mass spectrometry(GC-MS) analysis. The expression levels of NCR^(+)ILC3^(-), CCR6^(+)Nkp46-(Lti) ILC3^(-), and ILCreg-specific markers were detected by enzyme-linked immunosorbent assay, and real-time quantitative polymerase chain reaction and Western blot, respectively. Results: The main components of CSCC were matrine, ammothamnine, Sophora flavescens neoalcohol J, and Sophora oxytol U. After 7 days of treatment, CSCC significantly alleviated colitis by promoting the reproduction of intestinal probiotics manifested as upregulation of the abundance of Bacteroidetes species and specifically the Bacteroidales_S24-7 genus(P<0.05). Among the SCFAs, the content of butyric acid increased the most after CSCC treatment. Meanwhile, compared with the model group, Lti ILC3s and its biomarkers were significantly downregulated and NCR^(+) ILC3s were significantly elevated in the CSCC group(P<0.01). Further experiments revealed that ILC3s were differentiated from Lti ILC3s to NCR^(+)

关键词： composite Sophora colon-soluble capsule ulcerative colitis group 3 innate lymphoid cells gut microbiota butyric acid

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

New Geochronologic Evidence of Diabases and Their Metallogenic Relationship with the Makeng-Type Iron Deposits in Southwest Fujian, SE China

引用

Acta Geologica Sinica(English Edition) 2017年第6期91卷 2324-2326页

作者： WANG Sen ZHANG da WU Ganguo CAO Ke QU Hongjie MA Shuai YU Tengda Beijing Institute of Exploration Engineering China Geological Survey State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Beijing Research Institute of Uranium Geology

Objective The Makeng-type iron deposits are located in Late Paleozoic depression of southwest Fujian Province in the southeast edge of Cathaysia, which are famous for their huge scale and specific ore genesis. Previous studies mainly focus on the ore characteristics, metallogenic setting and the granites in the mining area, and there is still controversy on the ore genesis. Recent research has revealed that the iron ore bodies are spatially closely related to diabase rocks, especially those in the Makeng Fe deposit. Diabase dykes are widely distributed in the Makeng, Luoyang, Zhangkeng and other iron deposits,

关键词： New Geochronologic Evidence Metallogenic Relationship

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

Pilaring of Zn_2Al Layered Double Hydroxide by dawson Polyoxometalate Anions

引用

Chemical Research in Chinese Universities 1998年第2期14卷 68-70页

作者： GUO Jun LI Yun-lun JIAO Qing-ze JIANG da-zhen MIN En-ze Department of Chemistry Jilin UniversityChangchun130023 Research Institute of Petroleum Processing Beijing100083

Zn2Al layered double hydroxide pillared with dawson polyoxometalates,P2W17ZO8-61(Z=Mn2+,Co2+,Ni2+,Cu2+,Zn2+)was prepared.A basal space ofca.16 nm indicates the intercalated dawson ions to be oriented with their C2 axis perpendicular to the double hydroxide layers(with the exception of P2W17ZnLDH).The IR and^(13)P MASNMR spectral reveal that the dawson ions retain their integrity in the interlayer space of LDH.A preliminary study shows that these compounds are highly active catalysts for the oxidation of cyclohexene with molecular oxygen.

关键词： Pillaring dawson structure Polyoxometalate anions

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

QTL Analysis of Major Agronomic Traits in Soybean

引用

Agricultural Sciences in China 2007年第4期6卷 399-405页

作者： CHEN Qing-shan ZHANG Zhong-chen LIU Chun-yan XIN da-wei QIU Hong-mei SHAN da-peng SHAN Cai-yun HU Guo-hua Soybean Research Institute Northeast Agricultural University Harbin 150030 P.R.China Land Reclamation Research ＆ Breeding Centre of Heilongjiang Harbin 150036 P.R.China

Soybean is a main crop, and most agronomic traits of soybean are quantitative; therefore, there is vely important studying and applying value to locating these traits. A F2：10 RIL population containing 154 lines, derived from the cross between Charleston as female and Dongnong 594 as male parent, were used in this experiment. A genetic linkage map was constructed with 164 SSR primers, which were screened with the two parents and amplified on the 154 lines. 12 agronomic traits different between the two parents were investigated, and QTLs of all the traits were analyzed using the software Windows QTL Cartographer V2.0. The agronomic traits included quality traits： protein content, oil content, and content of protein and oil; yield traits： pods per plant, seed weight per plant, and 100 seeds weight; and other agronomic traits： plant height, days to maturity, branches, nod number in main stem, average leaf length, and average leaf width. The results showed that 68 QTLs in total were found for the 12 agronomic traits. The number of QTLs per trait varied from 3 for the average leaf width to 11 for 100 seeds weight and plant height, and was 5.8 on average. Good accordance was seen in many QTLs between the results of this study and the results obtained by other similar studies; therefore, these QTLs may be valuable for molecular marker assistant selection in soybean. In this study, 68 major QTLs of 12 important traits of soybean were analyzed.

关键词： soybean agronomic traits QTL SSR

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

Deaggregation of long chain alkyl β-naphthoic acid ester with β-CD and α-CD:A mimic way to remove excessive fat from fatty liver

引用

Chinese Chemical Letters 2008年第6期19卷 720-724页

作者： Chun Xi Zhai Hai Ning Gu da Yong sang Juan Tian Qi Zhong Zhou Department of Chemistry Zhejiang University Hangzhou 310027 China

The deaggregating ability of β-CD and α-CD against the aggregated n-hexadecyl β-naphthoate （A16） and n-dodecyl β-naphthoate （A12） depended not only on the aggregating tendency of A16 and A12 but also on the initial concentration of the aggregated A16 or A12. The inclusive ability of β-CD with the substrates is greater than that of α-CD under hydrophobiclipophilic interaction.

关键词： Deaggregation Aggregation Coaggregation Critical aggregating concentration

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：