Results 1 to 10 of about 9,395 (143)
基于修复体-牙-牙周界面治疗风险评估的美学区复杂冠根折修复策略 [PDF]
浙江大学学报. 医学版美学区复杂冠根折指发生于前牙区，牙冠和牙根部同时折断伴牙髓暴露及牙周组织损伤的牙外伤类型。该类损伤以腭侧折裂位置恒定、剩余牙体组织薄弱及侵犯生物学宽度为解剖特征，基于修复体-牙-牙周界面治疗风险评估的建立有利于预测治疗结果。通过剩余牙本质肩领类型和骨内根长评估抗力风险，结合牙龈及骨形态表型评判牙周风险，基于美观、稳定、微创的治疗原则，初步建立包括安全型、干预型、风险型三种美学区复杂冠根折诊断分型。各分型对应具体的修复和牙周干预策略：安全型患者通过牙冠延长术联合龈壁提升术，减小牙周风险 ...
孙 傲, 傅 柏平, 朱 慧勇
doaj +2 more sources
, 2004 Five morphologically distinct bacteria isolated from mangrove sediment by enrichment culture, were identified and tested for their ability to degrade dimethyl terephthalate （DMT） and its isomer dimethyl isophthalate (DMI). DMT at a concentration of 98 mg/
Gu, J, Li, J
core +8 more sources
Landscape Ecological Risk Assessment of Ya’an-Kangding Expressway Based on PLUS Model [PDF]
, 2023 [Objective] The regional landscape ecological risks were evaluated, and their spatiotemporal variation was analyzed in order to provide important support for reducing regional ecological risks, maintaining regional ecological security, and promoting ...
Li Xu, Liu Jingjing, Peng Peihao
core +1 more source
Process and Correlation Between Ecosystem Services Value and Ecological Risk in River Basin [PDF]
, 2022 [Objective] The spatio-temporal pattern and interrelationship between the value of ecosystem services and ecological risks in river basins were analyzed in order to ensure healthy and sustainable development of ecosystems, maintain regional ecosystem ...
Bi Shanshan +5 more
core +1 more source
Ecological effect of urban spatial expansion in river valleys: A case study in the main urban area of Lanzhou City [PDF]
, 2023 [Objective] The ecological effect of urban spatial expansion is the key problem of human-environment relationship in the process of urbanization. It is of great significance to explore the complex scientific problem of ecological effect caused by urban ...
WANG Ziyang, SHI Peiji, SHI Jing, ZHANG Xuebin, LIU Yue
core +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2017 以宁波北仑区1990，1995，2000，2005，2010，2015年6期LandsatTM/OLI遥感影像为数据源，提取景观格局数据，进行景观格局及其生态风险区时空演化特征分析.结果表明：(1)研究区的主要景观类型是林地与耕地，景观演化的主要特征表现为建设用地景观面积大量增加，耕地景观面积明显减少，区域景观破碎化愈加明显；(2) 25 a间,研究区内低生态风险区大量减少，而中、较高和高生态风险区面积大大增加；高生态风险区主要分布于北部平原地区，重心向西南方向移动 ...
HUANGRipeng(黄日鹏) +6 more
doaj +1 more source
Spatiotemporal Characteristics and Driver Detection of Landscape Pattern and Ecological Risk in Huangshui River Basin [PDF]
, 2023 [Objective] The characteristics and driving factors of landscape pattern changes and the spatiotemporal evolution of landscape ecological risk was analyzed in order to provide a theoretical basis for integrated watershed management, watershed ecosystem ...
Li Runjie +3 more
core +1 more source
Evaluation and Migration Path Analysis of Soil Heavy Metal Pollution in a Metal Mining Area of Qinling Mountain [PDF]
, 2023 BACKGROUNDThe Qinling Mountains are rich in metal mineral resources, but the problem of mine ecological environment damage left over from long-term high-intensity and large-scale mining has seriously affected the regional ecosystem in the Qinba area ...
Hao AI +5 more
core +1 more source
Analysis on spatial heterogeneity of ecological restoration demand in resource-based cities: taking Jiawang District of Xuzhou city as an example [PDF]
, 2022 After a long period of coal resource exploitation in resource-based cities, the imbalance and disharmony between resource development and ecological protection in coal mining areas are prominent.
Huping HOU +4 more
core +1 more source
Shuitu Baochi Xuebao, 2023 陕西汉江流域是"南水北调"中线工程的主要水源地,属于国家重点生态功能区。研究流域内景观格局的时空变化特征、生态系统服务价值和景观生态风险的相关性,对保持流域内生态系统稳定性、保障流域生态安全具有指导意义。基于2000年、2005年、2010年、2015年、2020年陕西汉江流域5期土地利用数据,采用景观格局指数计算、生态系统服务价值评估、景观生态风险评估等方法,研究景观格局变化下生态系统服务价值、景观生态风险的时空演变机制及空间相关关系。结果表明:(1)2000—2020年 ...
孟晓璐, 张艳芳
doaj