检索结果-内蒙古大学图书馆

SSRN 2023年

作者： Pan, Xin Wang, Xiao Liu, Liuqingqing Kuang, Shaoping Zheng, Hao College of Environment and Safety Engineering Qingdao University of Science and Technology Qingdao266042 China Marine Agriculture Research Center Tobacco Research Institute Chinese Academy of Agricultural Sciences Qingdao266101 China Institute of Coastal Environmental Pollution Control College of Environmental Science and Engineering Key Laboratory of Marine Environment and Ecology Ministry of Education Frontiers Science Center for Deep Ocean Multispheres and Earth System Ocean University of China Qingdao266100 China Sanya Oceanographic Institution Ocean University of China Sanya572000 China

As a crucial pyrolysis factor for biochar production, the mechanistically effect of different sweep gases on the inherent multi-level chemical structure of biochars is poorly understood, impeding the widespread use of biochars as sustainable carbon-negative materials. This study investigated the effect of CO2 and H2O as sweep gases relative to N2 on the physic-chemical properties of biochars derived from sawdust (SBC-N/C/H) and pig manure (PBC-N/C/H) at 300–700ºC. Meanwhile, carbon sequestration potential and potential environmental risks of SBC-N/C/H and PBC-N/C/H were comprehensively evaluated. Unlike N2, CO2 showed a superior effect on biochar (especially SBCs with more carbonaceous substances), decreased the oxygenated-functional groups content in SBC-C (4.6%–28.1%) relative to SBC-N (25.5%–37.4%) via cracking reaction. Besides, CO2 stimulated the formation of pore structure in biochar (surface area increased from 9.38 m2/g in SBC500-N to 15.0 m2/g in SBC500-C) by boudouard reaction. H2O exhibited a similar but less pronounced effect with CO2, leading to a lower H/C ratio in biochar by aggravated demethylation of methoxyl groups and facilitating a more developed pore structure with water-gas reaction. Both CO2 and H2O enhanced the carbon stability of biochar and carbon sequestration potential in SBC500-C (30.1%) and SBC500-H (28.7%) was higher than SBC500-N (25.6%). Moreover, CO2 and H2O exhibited excellent performance in mitigating phytotoxicity of biochars (especially for PBCs) to radish and cucumber seeds via the reduced release of polycyclic aromatic hydrocarbons and heavy metals. These results proposed an effective approach to improve long-term carbon sequestration and environmental safety of biochars. © 2023, The Authors. All rights reserved.

关键词： Carbon dioxide

来源：评论

学校读者我要写书评

暂无评论

Lobolones A–C, three new terpenoids from the soft coral Lobophytum catalai

引用

Journal of Molecular Structure 2025年 1343卷

作者： Wang, Ci-Li Zhang, Jia-Rui Li, Kai Yang, Jun-Jie Zhang, Yue Li, Lei Wang, Sen Li, Ping-Lin Key Laboratory of Marine Food Processing & Safety Control College of Food Science and Engineering Ocean University of China Qingdao266003 China Key Laboratory of Marine Drugs Chinese Ministry of Education School of Medicine and Pharmacy Ocean University of China Qingdao266003 China Laboratory for Marine Drugs and Bioproducts Qingdao Marine Science and Technology Center Qingdao266237 China Jinan250103 China

Three new terpenoids, namely lobolones A–C (1–3), together with two known related compounds were isolated from the soft coral Lobophytum catalai collected in the South China Sea. Lobolones A (1) and B (2) are two highly rearranged C17-trinorlobane-based diterpenoids, which are the third and fourth examples of this scaffold. Lobolone C (3) is representative of a new class of diterpenes possessing an uncommon bicyclo [4.2.2]-decane scaffold. The structures of these compounds were elucidated based on their spectroscopic data, experimental and calculated ECD spectra, and statistical procedures (CP3 and DP4+ analysis). In bioassay, lobolone C (3) demonstrated cytotoxic activity against several human cancer cell lines with IC50 values ranging from 5.8 to 29 μM, and induced cell apoptosis in K562 cells dose dependently. © 2025 Elsevier B.V.

关键词： Bioassay

来源：评论

学校读者我要写书评

暂无评论

Microbial Phylogenetic Divergence between Surface-Water and Sedimentary Ecosystems Drove the Resistome Profiles

SSRN

引用

SSRN 2023年

作者： Ohore, Okugbe Ebiotubo Zhang, Jingli Ifon, Binessi Edouard Kumwimba, Mathieu Nsenga Mu, Xiaoying Kuang, Dai Wang, Zhen Gu, Ji-Dong Yang, Guojing Key Laboratory of Tropical Diseases Control National Health Commission Key Laboratory of Tropical Translational Medicine of Ministry of Education School of Tropical Medicine Hainan Medical University Hainan Haikou571199 China Key Laboratory of Tropical Translational Medicine of Ministry of Education School of Tropical Medicine Hainan Medical University Hainan Haikou571199 China The First Affiliated Hospital of Hainan Medical University Hainan Haikou China Guangdong Provincial Key Laboratory of Marine Disaster Prediction and Prevention Guangdong Provincial Key Laboratory of Marine Biotechnology Shantou University Shantou515063 China Department of Clinical Medicine Shantou University Medical College Guangdong Shantou515041 China Department of Civil and Environmental Engineering Shantou University Shantou515063 China Laboratory of Physical Chemistry University of Abomey-Calavi Republic of Benin Cotonou01 BP 4521 Benin State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing100085 China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing100012 China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China Environmental Science and Engineering Program Guangdong Technion - Israel Institute of Technology 241 Daxue Road Jinping District Guangdong Shantou515063 China Guangdong Provincial Key Laboratory of Materials and Technologies for Energy Conversion Guangdong Technion Israel Institute of Technology 241 Daxue Road Jinping District Guangdong Shantou515063 China

Antibiotic pollution and the evolution of antibiotic resistance genes (ARGs) are critical issues of global significance. This study investigated the fate of antibiotics in sedimentary and aqueous substrates and the impact of ecosystem shift between water and sedimentary phases on resistome profiles. The total concentration of antibiotics in the surface water (49.5%) was significantly higher than suspended particulate matter (31.4%), and sedimental phases (19.1%). However, the relative abundance of ARGs in surface water and sediment was disproportionate to the abundance of antibiotics concentration, and sediments were the predominant ARGs reservoirs. Phylogenetic divergence of the microbial communities between the surface water and the sedimentary ecosystems resulted in a significant shift in the ARGs profiles between the two distinctive surface-water and sediments. ARGs of Clinical importance;blaGES, MCR-7.1, ermB, tet(34), tet36, tetG-01, and sul2 were significantly increased in the surface water, while blaCTX-M-01, blaTEM, blaOXA10-01, blaVIM, tet(W/N/W), tetM02, and ermX were amplified in the sediments. cfxA was an endemic ARG in surface-water ecosystems while the endemic ARGs of the sedimentary ecosystems included aacC4, aadA9-02, blaCTX-M-04, blaIMP-01, blaIMP-02, bla-L1, penA, erm(36), ermC, ermT-01, msrA-01, pikR2, vgb-01, mexA, oprD, ttgB, and aac. These findings provide crucial information for the identification of ARGs-specific high-risk reservoirs © 2023, The Authors. All rights reserved.

关键词： Antibiotics

来源：评论

学校读者我要写书评

暂无评论

Mechanistic Insights into the Sequestration of Antibiotics in Aquatic Sediments and the Microbial Phylogenetic Divergence between the Aqueous and Sediment Phases on the Fate of Antibiotic Resistance Genes

SSRN

引用

SSRN 2023年

Antibiotic pollution and the evolution of antibiotic resistance genes (ARGs) are critical issues of global significance. This study investigated the sequestration of antibiotics onto aquatic sediments and the microbial phylogenetic divergence between the aqueous and sedimentary phases on antibiotic resistome profiles. The total concentration of antibiotics in the surface water (49.5%) was significantly higher than suspended particulate matter (31.4%), and sedimental phases (19.1%). However, the relative abundance of ARGs in surface water and sediment was disproportionate to the abundance of antibiotics concentration, and sediments were the predominant ARGs reservoirs. Phylogenetic divergence of the microbial communities between the surface water and the sedimentary ecosystems resulted in a significant shift in the ARGs profiles between the two distinctive surface-water and sediments. Priority ARGs of Clinical importance;blaGES, MCR-7.1, ermB, tet(34), tet36, tetG-01, and sul2 were significantly increased in the surface water, while blaCTX-M-01, blaTEM, blaOXA10-01, blaVIM, tet(W/N/W), tetM02, and ermX were amplified in the sediments. cfxA was an endemic ARG in surface-water ecosystems while the endemic ARGs of the sedimentary ecosystems included aacC4, aadA9-02, blaCTX-M-04, blaIMP-01, blaIMP-02, bla-L1, penA, erm(36), ermC, ermT-01, msrA-01, pikR2, vgb-01, mexA, oprD, ttgB, and aac. These findings provide crucial information for the identification of ARGs-specific high-risk reservoirs © 2023, The Authors. All rights reserved.

关键词： Antibiotics

来源：评论

学校读者我要写书评

暂无评论

Resistance and propulsion performance of a twin skeg ship with different rudder angle

引用

Scientific Reports 2025年第1期15卷 1-24页

作者： Weimin, Chen Yongyue, Li Lei, Xing Li, Zhang Xing, Chang College of Shipbuilding Engineering Harbin Engineering University Harbin 1500011 China State Key Laboratory of Maritime Technology and Safety Shanghai Ship and Shipping Research Institute Co. Ltd Shanghai China Key Laboratory of Marine Technology Ministry of Communications Shanghai 200135 China Shanghai Merchant Ship Design & Research Institute Shanghai 201203 China

Rudder angle will change the flow field, resulting in different loads and interactions on the hull-propeller-rudder, which will affect the resistance and self-propulsion performance of the ship, and this effect will be amplified on the twin skeg ship. Resistance of the ship-rudder at the rudder angle of 0 ° -8 °, lift, moment, axial wake, the rudder profile velocity vector at the propeller shaft height, and the dynamic pressure distribution on the inner and outer surfaces of the rudder were simulated by CFD(Computational Fluid Dynamics) method, and verified by the EFD(Experimental Fluid Dynamics) method. Self-propulsion factors of the hull-propeller-rudder with rudder angle of 0 ° -6 ° were calculated by CFD method, and compared with the EFD results. Axial wake, dynamic pressure on the surface of the propeller and rudder and the velocity vector near the rudder, and the flow field and vorticity field of the hull-propeller-rudder were analyzed. The results showed that : 1) The CFD results had the same trend as the EFD results. When the rudder angle was 6 °, the total resistance of the ship-rudder was the smallest, and the resistance decreased by about 1%. 2) The change of rudder angle had little effect on the wake field in front, but it had a great influence on the flow field around the rudder, which in turn affected the resistance, lift and moment. 3) Self-propulsion performance was the best when the rudder angle was 4 °, and the self-propulsion power can decrease by about 4%, mainly due to the beneficial interaction between the propeller and the rudder. 4) Rudder angle had little effect on the surface pressure of the propeller, but it will slightly change the axial wake behind the propeller, and the dynamic pressure of the rudder was quite different. 5) When the rudder angle exceeded the optimal rudder angle of 4 °, the interaction between the hull-propeller-rudder became unfavorable, resulting in the chaos of the vorticity field and the overall performance degradat

关键词： Computational fluid dynamics Experimental fluid dynamics Hull-propeller-rudder interaction Resistance Self-propulsion Twin Skeg

来源：评论

学校读者我要写书评

暂无评论

Leaf metabolomic traits decipher the invasiveness of Alternanthera philoxeroides in urban wetlands

引用

Science of the Total Environment 2025年 968卷 178888页

作者： Huang, Xiaolong Yang, Jinming Yang, Xue Wang, Tong Meng, Jie Guo, Xiao Wang, Yang Xiong, Wen Zeng, Jin Wu, Zhaoshi Li, Kuanyi Jeppesen, Erik Key Laboratory of Lake and Watershed Science for Water Security Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Nanjing211135 China College of Landscape Architecture and Forestry Qingdao Agricultural University Qingdao266109 China Key Laboratory for Green Chemical Process of Ministry of Education Hubei Key Laboratory of Novel Reactor and Green Chemical Technology Institute of Changjiang Water Environment and Ecological Security School of Environmental Ecology and Biological Engineering Wuhan Institute of Technology Wuhan430205 China College of Life Sciences Hubei Normal University Huangshi435002 China Sino-Danish College University of Chinese Academy of Sciences Beijing China Department of Ecoscience Aarhus University Aarhus Denmark Limnology Laboratory Department of Biological Sciences and Centre for Ecosystem Research and Implementation Middle East Technical University Ankara Turkey Institute of Marine Sciences Middle East Technical University Erdemli-Mersin Turkey Institute for Ecological Research and Pollution Control of Plateau Lakes School of Ecology and Environmental Science Yunnan University Kunming China

Urbanisation has been considered to promote exotic plant invasion. Ecophysiology predicts phenotypic variation and potential evolution following urbanisation and can be used to evaluate plant invasiveness. However, few studies have included the role of ecophysiological traits for such invasiveness in urban ecosystems. Traditional plant functional traits have been used but have their limitations. Novel approaches such as metabolomics may potentially be useful. The present study explored the invasiveness of the cosmopolitan noxious invasive plant Alternanthera philoxeroides in urban and periurban areas of a megacity city in China using both traditional leaf functional traits and novel leaf metabolome as indicators. We found that traditional leaf functional traits, including specific leaf area, nitrogen concentration, carbon:nitrogen ratio and construction costs, did not differ between urban and periurban A. philoxeroides populations. However, metabolomic profiling showed that the urban populations had an up-regulated expression of zeatin and purine, two cytokinins correlated with plant growth and a down-regulated expression of isoflavonoids, a defensive metabolite for herbivory. Leaf metabolome may, therefore, be sensitive in deciphering the facilitative effects of urbanisation on plant invasion. We also found that the urban populations of A. philoxeroides accumulated more beneficial microbes, which might enhance their invasiveness. Urbanisation likely promotes exotic plants invasion through generation of metabolites, which stimulates growth via modification of the soil microbiome. Our results indicate that leaf metabolome may be used for interpreting plant invasiveness and predicting plant invasion. © 2025 Elsevier B.V.

关键词： Plant diseases

来源：评论

学校读者我要写书评

暂无评论

Layer by Layer Assembly of Poly(Allylamine Hydrochloride)/Phosphate Ions and Poly(Sodium 4-Styrene Sulfonate) Membrane for Forward Osmosis Application

引用

Journal of Ocean University of China 2019年第3期18卷 743-749页

作者： ZHOU Wen YU Li LI Yiming GAO Baoyu WANG Zhining Key Laboratory of Marine Chemistry Theory and Technology Ministry of Education Ocean University of China Qingdao 266100 China Shandong Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and Engineering Shandong University Jinan 250100 China

Based on the layer by layer(Lb L)assembly technology,the nano-scale composite membrane with excellent structure can be prepared by changing the polyelectrolyte and controlling the deposition *** and phosphate ions(Pi)can be self-organized to form supramolecular systems which could be exploited to stabilize the interfacial *** LbL membrane was made of the positively charged poly(allylamine hydrochloride)(PAH)self-organized with Pi and the negatively charged poly(sodium 4-styrene sulfonate)(PSS)alternatively on top of a poly(acrylonitrile)(PAN)*** to the membrane without Pi,the membrane assembled by PAH/Pi improved forward of flux and reduced flux of *** concentration of PAH and PSS,deposition time,pH and number of layers showed significant influences on the performance of the *** this experiment,we systematically investigated the preparation conditions and under the optimized conditions the prepared membrane exhibited high water fluxes of 13.5 L m^-2 h^-1 with corresponding salt to water flux,Js/Jv,ratio of 0.07 g L^-1 tested by forward osmosis when DI water as feed solution and 2 mol L^-1 MgCl2 as draw solution.

关键词： forward osmosis layer by layer(LbL) polyelectrolyte phosphate ions

来源：评论

学校读者我要写书评

暂无评论

Evaluating the effectiveness of the ecological redline policy in conserving mangroves via assessment on coverage and carbon storage [Environ. Sustain. Indicat. 26 (June 2025) 100650]

引用

Environmental and Sustainability Indicators 2025年 26卷

作者： Jin Liang Yisheng Peng Hanxi Chen Yafei Wang Yu Xing Yan Liao School of Environmental Science and Engineering Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) Sun Yat-sen University Guangzhou 510006 China South China Institute of Environmental Sciences Ministry of Ecology and Environment State Environmental Protection Key Laboratory of Water Environmental Simulation and Pollution Control Guangzhou 510655 China

来源：评论

学校读者我要写书评

暂无评论

Uncertain Parameters Adjustable Two-Stage Robust Optimization of Bulk Carrier Energy System Considering Wave Energy Utilization

引用

Journal of marine Science and engineering 2025年第5期13卷 844-844页

作者： Zhang, Weining Bao, Chunteng Chen, Jianting Department of Economics and Management Shanghai Maritime University Shanghai201306 China Key Laboratory Marine Technology and Control Engineering Ministry of Transport Shanghai Maritime University Shanghai201306 China State Key Laboratory of Maritime Technology and Safety Shanghai Ship and Shipping Research Institute Co. Ltd. Shanghai200135 China

Within the 21st century, in the Maritime Silk Road, wave energy, a clean renewable source, is drawing more interest, especially in areas with power shortages. This paper investigates wave energy in ships, particularly in a hybrid electric bulk carrier, by designing a system that supplements the existing power setup with oscillating buoy wave energy converters. The system includes diesel generators (DGs), a wave energy generation system, heterogeneous energy storage (consisting of battery storage (BS) and thermal storage (TS)), a combined cooling heat and power (CCHP) unit, and a power-to-thermal conversion (PtC) unit. To ensure safe and reliable navigation despite uncertainties in wave energy output, onboard power loads, and outdoor temperature, a robust coordination method is adopted. This method employs a two-stage robust optimization (RO) strategy to coordinate the various onboard units across different time scales, minimizing operational costs while satisfying all operational constraints, even in the worst-case scenarios. By applying constraint linearization, the robust coordination model is formulated as a mixed-integer linear programming (MILP) problem and solved using an efficient solver. Finally, the effectiveness of the proposed method is validated through case studies and comparisons with existing ship operation benchmarks, demonstrating significant reductions in operational costs and robust performance under various uncertain conditions. Notably, the simulation results for the Singapore–Trincomalee route show an 18.4% reduction in carbon emissions compared to conventional systems. © 2025 by the authors.

关键词： Power management (telecommunication)

来源：评论

学校读者我要写书评

暂无评论

Vertical Transport of Ultrafine Particles and Turbulence Evolution Impact on New Particle Formation at the Surface & Canton Tower

SSRN

引用

SSRN 2023年

作者： Wu, Hao Li, Zhanqing Hai, Shangfei Gao, Yang Jiang, Jingkun Zhao, Bin Cribb, Maureen Zhang, Dongmei Pu, Dongyang Liu, Mengqi Wang, Chunling Lan, Jing Wang, Yuying Key Laboratory of China Meteorological Administration Atmospheric Sounding School of Electrical Engineering Chengdu University of Information Technology Chengdu610225 China Department of Atmospheric and Oceanic Science University of Maryland College ParkMD20742 United States College of Oceanic and Atmospheric Sciences Ocean University of China Qingdao266100 China Frontiers Science Center for Deep Ocean Multispheres and Earth System Key Laboratory of Marine Environmental Science and Ecology Ministry of Education Ocean University of China Qingdao266100 China School of Environment State Key Joint Laboratory of Environment Simulation and Pollution Control Tsinghua University Beijing100084 China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing100084 China College of Global Change and Earth System Science Beijing Normal University Beijing100875 China Guangzhou Climate and Agrometeorology Center Guangzhou511430 China Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration Nanjing University of Information Science & Technology Nanjing210044 China

New particle formation (NPF) is a key process occurring in the planetary boundary layer (PBL). Newly formed particles are an important source of aerosols and cloud condensation nuclei (CCN) that influence clouds and climate, while the distribution of these new particles at different altitudes has rarely been studied. In-situ measurements of ultrafine particles (UFP) observed at the ground and at the top of the Canton Tower (454 m) located in downtown Guangzhou in southern China were analyzed using the measurements of multiple meteorological and physicochemical quantities, as both observed during a field campaign and simulated with the WRF-chem model. We found that turbulence and NPF characters vary considerably with heights, with UFP concentration diminishing by half from the surface to the tower top. This indicates the UFP transports upward from the ground in the lower boundary layer. A consistent relationship is established between the occurrences of NPF and the evolution of turbulence. The correlation between the exchange ratio at the tower top has correlated well with nucleation growth, suggesting that turbulence can play an important role in the episodes of NPF growth, whose growth rate is closely related to the turbulence exchange ratio, effectively dictating the ultrafine particle concentration before and during the lockdown period. A new mechanism is thus hypothesized: NPF happens eailer near the surface and grows faster at the upper PBL, attributed to condensable vapors being transported by turbulent vertical mixing in the boundary layer. Model simulations using the WRF-Chem model reveal that the exchange ratio changed the NPF parameters, supporting the proposed mechanism that the evolution of the PBL variation has a significant impact on NPF, which should not be omitted in the NPF research, since this physical factor could be a dominant one in the NPF mechanism. © 2023, The Authors. All rights reserved.

关键词： Turbulence

来源：评论

学校读者我要写书评

暂无评论

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

请选择保存的检索档案：

请选择收藏分类：

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

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

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：