检索结果-南通市图书馆

Polyp-Canal Reconstruction Reveals Evolution Toward Complexity in Corals

research 2024年第1期2023卷 417-428页

作者： Yixin Li Xin Liao Xin Wang Yuanchao Li Hongwei Zhao Yunpeng Zhao Junyuan Chen Chunpeng He Zuhong Lu State Key Laboratory of Bioelectronics School of Biological Science and Medical EngineeringSoutheast UniversityNanjing 210096China State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116024China Guangxi Key Lab of mangrove Conservation and Utilization Guangxi Mangrove Research CenterGuangxi Academy of SciencesBeihai 536000China Hainan Academy of Ocean and Fishery Sciences Haikou 571126China State Key Laboratory of Marine Resources Utilization in South China Sea Hainan UniversityHaikou 570228China Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences39 East Beijing RoadNanjing 210008China

Modern scleractinian corals are classified into robust,complex,and basal clades through comparative molecular ***,only few morphological or biological criteria can systematically determine the evolutionary trajectories of these major scleractinian coral ***,we obtained the structural information of 21 scleractinian coral species representing robust and complex clades:High-resolution micro-computed tomography was used to reconstruct the polyp-canal systems in their colonies and to visualize the dynamic polyp growth *** found that the emergence of mesh-like canals may distinguish representatives of complex and robust *** differences in polyp-canal connections suggest distinct evolutionary trajectories among coral species:The formation of the canal network promoted the development of more complex coral structures,and coral polyps within this network formed calices of very similar volume,following precise axial growth *** influence of individual polyps on the coral colony becomes less significant as coral structures become more complex,and coral species with more complicated polyp-canal systems occupied niches more *** work supplements current evolutionary studies on reef-building corals,providing insight for further studies on coral growth patterns.

关键词： Coral representing directions

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

Effects of the Residues of Cuscuta campestris and Mikania micrantha on Subsequent Plant Germination and Early Growth

引用

Journal of Integrative Agriculture 2012年第11期11卷 1852-1860页

作者： LI Feng-lan LI Ming-guang ZAN Qi-jie GUO Qiang ZHANG Wei-yin WU Zhi WANG Yong-jun State Key Laboratory of Biocontrol Sun Yat-sen University Guangzhou 510275 P.R.China futian-cityu mangrove research & development centre Shenzhen 518040 P.R.China The Shenzhen Wild Animal Rescue Center Shenzhen 518000 P.R.China Office of Greening Committee of Shenzhen City Shenzhen 518048 P.R. China Laboratory of Forest Ecology and Environment State Forestry Administration Beijing 100714 P.R.China Institute of Forest Ecology Environment and Protection Chinese Academy of Forestry Beijing 100091 P.R.China Guangdong Neilingding-futian National Nature Reserve Shenzhen 518040 P.R. China

Cuscuta campestris, a dodder, can parasitize and suppress a scrambling herbaceous to semi-woody perennial vine, Mikania micrantha, one of the most destructive weeds in the world. To assess the effects of the mixed residue of C. campestris and M. micrantha on the subsequent plant community, we conducted a one-year experiment on the germination and seedling growth of subsequent plant community after the application of C. campestris. Seven treatments of varying proportions of C. campestris and M. mierantha residue on 21 subject trees and shrubs, which were commonly found in South China, resulted in a germination rate of 35.3% for all 8 715 seeds from 18 species, ranging from 5.7 to 81.9%; the remaining 3 species failed to germinate. ANOVA analysis showed that the residue did not affect the germination, growth, or mortality of the trees and shrubs. The germinated C. campestris seeds from the residue coiled the seedlings of most of the species, but less than 4% host death caused by C. campestris. In addition, the residue did not affect the germination of the herbaceous seedlings originating from the loam, and the similarity coefficients of the germinated seedlings between the treatments were very high. These results suggested that the residue had no negative impact on the germination and early seedling stages of the tree, shrub and grass species of the subsequent plant community. The use of C. campestris residue had a positive effect on the growth of M. micrantha, but it did not change the trend of M. micrantha being suppressed because re-parasitization occurred soon after the growth restarted. No negative effect was detected on the other species as a result of the parasitization of C. campestris or by the use of the mixed residue. This suggests that C. campestris is likely to be an effective and promising ecologically safe native herbaceous agent for controlling M. micrantha.

关键词： invasive species parasitic plant control subsequent 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

Study on the Establishment of Demonstration Site for Peatland Conservation through Integrated Management and Sustainable Utilization of Non-timber Forest Products(NTFPs)

引用

Journal of Agricultural Science and Technology(A) 2024年第2期14卷 93-106页

作者： Sann Lwin Mya Win Myint Myint Khaing Tin Maung Htun Soe Min Ye Wunna Soe Forest Resource Environment development and Conservation Association(FREDA)

A participatory action research was conducted in 2022,with the“Establishment of Demonstration Site for Peatland Conservation through Integrated Management and Sustainable Utilization of Non-Timber Forest Products(NTFPs)”to give recommendation on the development of guidelines on Sustainable Utilization of Non-Timber Forest Products(NTFPs)and peatland *** to the peat soil assessment,it was found that peat soil content was very low and top soil was thin under the mangrove forest,and Payena paralleloneura-Kan Zaw bearing forest in March *** material might be pressed by trespasser to collect Kan Zaw seed,to conduct horticulture and mining near the Kan Zaw bearing forest,or organic material might be damaged by burning with controlled fire in the previous years,under Kan Zaw trees to collect *** material might have been carried to the downwards with running water due to the heavy rainfall,with 4,700 mm/*** forest and Kan Zaw bearing evergreen forest can be assumed as“the major source of coastal peatland formation,with peat deposits eroded seawards”.It is assumed that the organic material will accumulate on top of the sands and it will lead to the formation of the peatland at coastal *** can be assumed that the accumulation of organic material found in mangrove forest and evergreen forests will promote the soil carbon storage,if we can adopt the ASEAN Policy on Zero Burning,which reflect ASEAN's commitment to controlling fires and haze,offering techniques,benefits,requirements,and challenges for implementing zero burning practices[1].Sustainable utilization of NTFP including peat and Kan Zaw-Payena paralleloneura Kurz seed was studied at demonstration sites,and it is recommended to make a trial on silvicultural system at mangrove forest and apply suitable silvicultural system such as Clear-Felling(in blocks or in alternate strips)system,Selection System,and Shelter Wood System to ensure the sustainable utilization of NTFP

关键词： Silvicultural system mangrove forest moist evergreen forest peat soil Kan Zaw-Payena paralleloneura Kurz seed

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

Ontogenetic resource use and trophic dynamics of endangered juvenile Tachypleus tridentatus among diversified nursery habitats in the northern Beibu Gulf,China

引用

Integrative Zoology 2021年第6期16卷 908-928页

作者： Kit Yue KWAN Justin BOPP Shuyan HUANG Qiao CHEN Chun-Chieh WANG Xueping WANG Wenquan ZHEN Junhua ZHU Xing HUANG College of Marine Sciences Beibu Gulf UniversityQinzhouChina Guangxi Key Laboratory of Beibu Gulf Marine Biodiversity Conservation QinzhouChina School of Marine and Atmospheric Sciences Stony Brook UniversityStony BrookNew YorkUSA futian-cityu mangrove R&D Center City University of Hong Kong Shenzhen Research InstituteShenzhenChina Guangxi Key Laboratory of Marine Environmental Science Guangxi Beibu Gulf Marine Research CenterGuangxi Academy of SciencesNanningChina Guangxi Key Laboratory of Marine Disaster in the Beibu Gulf QinzhouChina

Horseshoe crabs,the most well-known example of“living fossils”,are iconic and ecologically important macroinvertebrates in coastal and estuarine *** blood is a crucial resource for manufacturing Limulus or Tachypleus amebocyte lysate to detect bacterial endotoxins or fungal contamination in drug and medical *** enhanced understanding of their ecological roles and trophic interactions in the food webs is fundamental to facilitate resource management for the declining populations in *** information of the Asian species,however,is mainly derived from preliminary,scattered reports from a limited number of study *** this study,resource utilization,trophic niche dynamics,and trophic interaction of the juvenile tri-spine horseshoe crab,Tachypleus tridentatus(instars 1–12,approximately 0.5–8 years old)across ontogeny was assessed in diversified nursery habitats along the northern Beibu Gulf,China,using carbon and nitrogen stable *** results suggest that:(i)*** are ecological generalists given the vast range of carbon isotopic values and trophic niche width estimates exhibited between multiple instar groups;(ii)juvenile *** across most habitat types predominantly assimilated energy from a variety of basal production sources in the food web,but primarily depended on sedimentary organic matter and seagrass resource pools;(iii)ontogenetic shifts in juvenile dietary proportions were evident,with decreased reliance on sedimentary organic matter,coupled with increased reliance on benthic macroinvertebrate grazers,detritivores,and omnivores with age;and(iv)nearly all juvenile instars occupied similar trophic positions in the food web with slight shifts in trophic position present with increasing *** findings indicate that resource availability and ontogenetic diet shifts strongly influence horseshoe crab trophic dynamics,and age should be accounted when formulating habitat conservation measures based on resour

关键词： intertidal food webs ontogenetic shift stable isotopes Tachypleus tridentatus trophic niche width

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

Nacre-liked material with tough and post-tunable mechanical properties

引用

Journal of Materials Science & Technology 2022年第19期114卷 172-179页

作者： Zhengyi Mao Mengke Huo Fucong Lyu Yongsen Zhou Yu Bu Lei Wan Lulu Pan Jie Pan Hui Liu Jian Lu Department of Mechanical Engineering City University of Hong KongTat Chee AvenueKowloonHong KongChina cityu-Shenzhen futian research Institute No.3Binglang RoadFutian DistrictShenzhen 518000China Department of Material Science Engineering City University of Hong KongTat Chee AvenueKowloonHong KongChina Hong Kong Branch of National Precious Metals Material Engineering research Center City University of Hong KongHong KongChina centre for Advanced Structural Materials City University of Hong Kong Shenzhen Research InstituteGreater Bay Joint DivisionShenyang National Laboratory for Materials ScienceShenzhen 518057China Laboratory of Nanomaterials&Nanomechanics City University of Hong KongHong KongChina

Biomaterials,often imparted time-dependent mechanical properties,which are promising in fields rang-ing from sensors to ***,a facile method was proposed to fabricate post-tunable mechanical properties composites based on hydrogels and ceramic *** wide tunable range of Young’s modulus(27.3 kPa to 3.5 GPa)and ultimate stress(173 kPa to 102 MPa)can be achieved by combining solvent absorption and evaporation process with platelets reinforcement ***,a large fracture toughness(∼32,000 J m^(-2))is obtained as a result of the nacre-liked“brick and mortar”structure introduced by shear force during *** superior flexibility and designability of this material were demonstrated via actuators,portable structure,and *** all,this study provides a new thought to fabricate tough materials with post-tunable mechanical properties.

关键词： Mechanical property Post-tunable Hydrogels Fracture toughness

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

development of Bioimplants with 2D, 3D, and 4D Additive Manufacturing Materials

引用

Engineering 2020年第11期6卷 1232-1243页

作者： Guo Liu Yunhu He Pengchao Liu Zhou Chen Xuliang Chen Lei Wan Ying Li Jian Lu Department of Mechanical Engineering City University of Hong KongHong Kong 999077China centre for Advanced Structural Materials City University of Hong Kong Shenzhen Research InstituteGreater Bay Joint DivisionShenyang National Laboratory for Materials ScienceShenzhen 518057China Hong Kong Branch of National Precious Metals Material Engineering research Center(NPMM) City University of Hong KongHong Kong 999077China cityu-Shenzhen futian research Institute Shenzhen 518045China

Over the past 30 years,additive manufacturing(AM)has developed rapidly and has demonstrated great potential in biomedical *** is a materials-oriented manufacturing technology,since the solidification mechanism,architecture resolution,post-treatment process,and functional application are based on the materials to be ***,3D printable materials are still quite limited for the fabrication of *** this work.2D/3D AM materials for bioimplants are ***,inspired by Tai Chi,a simple yet novel soft/rigid hybrid 4D AM concept is advanced to develop complex and dynamic biological structures in the human body based on 4D printing hybrid ceramic precursor/ceramic materials that were previously developed by our *** the development of multi-material printing technology,the development of bioimplants and soft/rigid hybrid biological structures with 2D/3D/4D AM materials can be anticipated.

关键词： Bioprinting 2D additive manufacturing 3D printing 4D printing Bioimplants

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

mangrove Resources, Human Disturbance and Rehabilitation Action in China

引用

生物多样性 1995年第B6期3卷 49-54页

作者： FAN HANGQING Guangxi mangrove research Center Beihai Guangxi 536000

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

The physical origin of observed repulsive forces between general dislocations and twin boundaries in FCC metals:An atom-continuum coupling study

引用

Journal of Materials Science & Technology 2022年第14期109卷 221-227页

作者： Jiayong Zhang Hongwu Zhang Qian Li Lizi Cheng Hongfei Ye Yonggang Zheng Jian Lu Department of Engineering Mechanics State Key Laboratory of Structural Analysis for Industrial EquipmentFaculty of Vehicle Engineering and MechanicsDalian University of TechnologyDalian 116024China Department of Mechanical Engineering Shenyang National Laboratory for Materials ScienceGreater Bay Joint DivisionCity University of Hong KongTat Chee AvenueKowloonHong KongChina cityu-Shenzhen futian research Institute Shenzhen 518045China

The combination of ultrahigh strength and excellent ductility of nanotwinned materials is rooted in the interaction between dislocations and twin boundaries(TBs).Quantifying the interaction between TBs and dislocations not only offers fresh perspectives of designing materials with high strength and ductility,but also becomes the cornerstone of multiscale modeling of materials with *** this work,an atomcontinuum coupling model was adopted to quantitatively investigate the interaction between dislocations and *** simulation shows that the dislocation-TB interaction is much weaker than the interaction between dislocations at the same *** of the early stage of dislocation pileups further verifies that the experimentally observed repulsive forces are essentially from the dislocations or kink-like steps on *** interaction between TBs and dislocations with different Burgers vectors was demonstrated referring to the elastic theory of *** the intrinsic interaction between dislocations and TBs being clarified,this work will promote further development of the multiscale simulation methods,such as discrete dislocation dynamics or phase-field method,of materials with TBs by providing a quantitative description of the interactions between TBs and dislocations.

关键词： Twin boundary Intrinsic interaction Repulsive force Dislocation pileup Atomistic simulation Anisotropic elasticity

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

Roles of fishing and climate change in long-term fish species succession and population dynamics in the outer Beibu Gulf,South China Sea

引用

Acta Oceanologica Sinica 2019年第10期38卷 1-8页

作者： Xuehui Wang Yongsong Qiu Feiyan Du Weida Liu Dianrong Sun Xiao Chen Weiwen Yuan Yong Chen South China Sea Fisheries research Institute Chinese Academy of Fishery SciencesGuangzhou 510300China Key Laboratory of Open-Sea Fishery development Ministry of Agriculture and Rural AffairGuangzhou 510300China Guangdong Provincial Key Laboratory of Fishery Ecology and Environment Guangzhou 510300China College of Marine Sciences South China Agricultural UniversityGuangzhou 510642China School of Marine Sciences University of MaineOronoMaine 04469USA Guangxi Academy of Sciences Guangxi Mangrove Research CenterGuangxi Key Lab of Mangrove Conservation and UtilizationBeihai 536000China

A prevailing,controversial hypothesis is that fishing pressure has played a greater role than climatic and environmental drivers,in changing fish species succession and biomass fluctuation in the South China Sea(SCS).Based on otter trawl survey data from 1959 to 2010 in the outer Beibu Gulf(OBG),northern SCS,large seasonal and interannual variation is reported for fish species composition,the proportional abundances of dominant taxa,and fish *** additive models are developed to quantify relationships between fish biomass and the external factors of fishing pressure and climate *** pressure proved to be the main driver of sharp declines in demersal fish stocks,with high-value species being replaced by low-value ones over *** decreases in fish biomass during the years of 1993 and 1998 correspond to El Nino events,with climate change possibly the main driver of proportional representation of pelagic species in fisheries trawl *** need to differentiate impacts of fishing and environmental drivers on fish species with different life history strategies is stressed to better understand fish community dynamics.

关键词： fish species succession biomass fluctuation fishing effect climate influence Beibu Gulf northernSouth China Sea

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

Effects of Quicklime and Iron Tailings as Modifier on Composition and Properties of Steel Slag

引用

Journal of Iron and Steel research International 2015年第1期22卷 15-20页

作者： Zuo-shun ZHANG Fang LIAN Lai-jun MA Yu-sheng JIANG School of Materials Science and Engineering University of Science and Technology Beijing research and Design Department Beijing Jinyu Mangrove Environmental Protection Technology Co.Ltd.

Steel slag had lower activity and much lower hydration rate than cement. Quicklime and iron tailings were designed as modification agent to adjust the composition and properties of high temperature steel slag. The results show that quicklime as modifier can greatly increase the content of cementitious minerals in modified steel slag and also promote the decomposition of RO phases and transformation of MgO in RO phase to f-MgO. After high temper- ature modification with compound modifier of quicklime and iron tailings, steel slag shows the main mineral phases of C3S, C2F and MgFe2O4. The activity index of modified steel slag at 28 days reaches 95.5% when the steel slag is modified by 15% of the compound modifier with the ratio of quicklime to iron tailings equal to 2 ： 1 at 1 350 ℃. Mo- reover, the sample with the modified steel slag exhibits the dense structure of hydration paste and the main hydration products of C-S-H gels and Ca（OH）2 crystals.

关键词： modifier steel slag mineral composition microstructure cementing property

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：