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徐州市林业害虫的捕食性天敌昆虫调查与分析 认领
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作者 郭同斌 《江苏林业科技》 2020年第1期32-41,共10页
采用踏查和灯诱等方法,系统调查了徐州市林业害虫的捕食性天敌昆虫种类、寄主和分布等情况,并根据分布范围和成虫标本采集总数,将捕食性天敌种类划分为优势种类、常见种类和稀有种类。调查结果显示,徐州市共有捕食性天敌7目26科107种,... 采用踏查和灯诱等方法,系统调查了徐州市林业害虫的捕食性天敌昆虫种类、寄主和分布等情况,并根据分布范围和成虫标本采集总数,将捕食性天敌种类划分为优势种类、常见种类和稀有种类。调查结果显示,徐州市共有捕食性天敌7目26科107种,对比历史上已有记载的7目15科49种,此次仅调查到26种,另新增记录58种。调查到的84种捕食性天敌(隶属于7目25科)中,在全市分布较广的常见种类达41种,其余43种为稀有种类,仅分布在1—2个县(市、区)。41种常见种类中,分布广且成虫标本数超过10枚的优势种类共14种,分别为半翅目的暴猎蝽、褐负蝽,鞘翅目的绿步甲、黄斑青步甲、中华婪步甲、黑缘红瓢虫、异色瓢虫、十二斑褐菌瓢虫,膜翅目的陆马蜂,双翅目的黑带食蚜蝇、中华食虫虻,蜻蜓目的黄蜻和脉翅目的中华草蛉及螳螂目的中华大刀螂等。该调查首次系统查明了徐州市捕食性天敌昆虫的种类,初步掌握了它们的寄主、分布和发生等资源现状,为开展美国白蛾和杨小舟蛾等重要林业害虫的本土捕食性天敌昆虫生物学特性和保护利用技术研究提供了科学依据。 展开更多
关键词 林业害虫 捕食性天敌 种类 优势种类 常见种类 稀有种类 调查 徐州市
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Spatial dynamic patterns of saltmarsh vegetation in southern Hangzhou Bay:Exotic and native species 认领
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作者 Si-long Huang Yi-ning Chen Yan Li 《水科学与水工程:英文版》 EI CAS CSCD 2020年第1期34-44,共11页
A saltmarsh has developed rapidly on the mudflat of Andong Shoal,in southern Hangzhou Bay,over the last decade since embankment.The saltmarsh vegetation changes are driven by both sediment dynamic conditions and the c... A saltmarsh has developed rapidly on the mudflat of Andong Shoal,in southern Hangzhou Bay,over the last decade since embankment.The saltmarsh vegetation changes are driven by both sediment dynamic conditions and the competition between the exotic species Spartina alterniflora(S.alterniflora) and the native species Scirpus mariqueter(S.mariqueter).This study attempted to investigate large-scale spatial variations in the exotic and native species,by analyzing and interpreting a time series(2016-2018) of high-resolution(less than 1 m) remote sensing images.The total area of the saltmarsh increased at a rate of 1.07 km^2/year,due to the accretion of the whole tidal flat.The spatial patterns revealed a new bimodal pattern for S.alterniflora invasion.S.alterniflora expanded over the upper to middle saltmarsh at a rate of1.68 km2/year.However,the S.alterniflora patches at the seaward edge expanded at a negative rate of-0.005 km^2/year,indicating a different pattern in competition:S.alterniflora had more advantages in the upper saltmarsh,while S.mariqueter had more advantages in the pioneer zone with low elevation.Consequently,S.alterniflora mainly established new habitats by invading S.mariqueter in the middle saltmarsh,but S.mariqueter occupied the bare mudflat for tradeoff.Our results aindicated that the interspecific competition result between S.alterniflora and S.mariqueter depended on elevation,and low elevation might create a favorable environment for S.mariqueter to win the competition with exotic species.This finding could be applied to future invasive species control and saltmarsh management. 展开更多
关键词 Saltmarsh SPARTINA alterniflora SCIRPUS mariqueter SPATIAL variation Competition EXOTIC SPECIES Native SPECIES
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Butterfly-plant interactions and body size patterns along an elevational gradient in the Manang region of central Nepal 认领
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作者 Bimal Raj SHRESTHA Binu TIMSINA +4 位作者 Zuzana MüNZBERGOVá Tomás DOSTáLEK Prakash GAUDEL Tej B.BASNET Maan B.ROKAYA 《山地科学学报:英文版》 SCIE CSCD 2020年第5期1115-1127,共13页
Butterflies are widely studied due to their key ecosystem functions.For this reason,they are used in ecosystem assessment,formulating conservation plans and in raising the environmental awareness.Quantification of dif... Butterflies are widely studied due to their key ecosystem functions.For this reason,they are used in ecosystem assessment,formulating conservation plans and in raising the environmental awareness.Quantification of different factors affecting diversity of butterflies is important for their effective conservation.In this study,we investigated abiotic and biotic factors affecting species richness and community composition of butterflies along an elevational gradient in Manang region,central Nepal.We also tested if butterfly species follow the Bergmann’s rule.A total of 57 butterfly species belonging to 39 genera and 8 families were recorded in the study area.Out of a total of 127 plant species identified in the study region,only 67 plant species were visited by butterflies as nectar sources.Species richness of butterflies increased with increasing elevation.Species richness was significantly higher in places with shrubs compared to other places and also in autumn than in summer.Species richness of butterflies also depended on composition of plant species occurring at the localities.Butterfly species composition varied among sampling localities.It was also determined by habitat type,elevation,sampling time,plant species and interactions of elevation×time.The relationship between butterfly size and elevation was in the opposite direction than expected according to the Bergmann’s rule.In conclusion,protection of butterfly diversity can only be achieved by protecting different habitats across the diverse physiography of the region and different plant species,in particular herbs and shrubs.Our results do not support the Bergmann’s rule for butterflies along an elevational gradient in our region. 展开更多
关键词 LEPIDOPTERA MICROHABITAT Species richness Species composition Bergmann’s rule
The importance of grain and cut-off size in shaping tree beta diversity along an elevational gradient in the northwest of Colombia 认领
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作者 Johanna Andrea Martínez-Villa Sebastián González-Caro álvaro Duque 《森林生态系统:英文版》 SCIE CSCD 2020年第1期14-25,共12页
Background:Species turnover(β-diversity)along elevational gradients is one of the most important concepts in plant ecology.However,there is a lack of consensus about the main driving mechanisms of treeβ-diversity at... Background:Species turnover(β-diversity)along elevational gradients is one of the most important concepts in plant ecology.However,there is a lack of consensus about the main driving mechanisms of treeβ-diversity at local scales in very diverse ecosystems(e.g.,Andean mountains),as well as how the sampling effect can alterβ-diversity estimations.Recently,it has been hypothesized that patterns of change inβ-diversity at local scales along elevational gradients are driven by sampling effects stemming from differences in the size of the species pool rather than by underlying community assembly mechanisms.Thus,we aim to evaluate the relative extent to which sampling effects,such as species pool size,grain size,and tree size cut-off,determine species sorting,and thus,the variability ofβ-diversity at local scales along elevational gradients in the northwest of Colombia.Results:Using 151-ha permanent plots spread out along a 3000m elevational gradient,we used standardizedβ-deviation to assess the extent to which either sampling effects or the community assembly mechanisms determine the changes in species composition at local scales.Standardizedβ-deviation was measured as the difference between the observed and nullβ-diversity divided by the standard deviation of the nullβ-diversity.We found that the magnitude of change in localβ-deviation along the elevational gradient was significant and dependent on the employed spatial grain size and tree size cut-off.However,β-deviation increased with elevation in all sampling designs,which suggests that underlying community assembly mechanisms play a key role in shaping localβ-diversity along the elevational gradient.Conclusions:Our findings suggest that grain size enlargement and the inclusion of trees with small diameters will improve our ability to quantify the extent to which the community assembly mechanisms shape patterns ofβ-diversity along elevational gradients.Overall,we emphasize the scale-dependent nature of the assessment ofβ-diversity.Likewise,we call for 展开更多
关键词 Andean FORESTS NULL models SPECIES POOL SPECIES SORTING Sampling effect
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Novel Primate Bocaparvovirus Species 3 Identified in Wild Macaca Mulatta in China 认领
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作者 Yuanyun Ao Zhaojun Duan 《中国病毒学:英文版》 SCIE CAS CSCD 2020年第1期34-42,共9页
Primate bocaparvovirus(BOV) is a possible cause of respiratory disorders and gastroenteritis in humans. However, the diversity and evolution of these viruses remain largely unknown, despite the identification of a gro... Primate bocaparvovirus(BOV) is a possible cause of respiratory disorders and gastroenteritis in humans. However, the diversity and evolution of these viruses remain largely unknown, despite the identification of a growing number of BOVs in non-human primates(NHPs). Here, we report the identification of a novel BOV(provisionally named Macaca mulatta bocaparvovirus [MmBOV]) in the feces of wild Macaca mulatta in China by viral metagenomic analysis. Seven of 400 fecal samples from Macaca mulatta were positive for MmBOV. An almost complete genome sequence of 4,831 nucleotides was obtained, which had genomic organization and protein motifs similar to human bocaviruses(HOBVs), and shared characteristically low G/C content and weak codon usage bias. Sequence analyses of NS1, NP1, and VP1 revealed that Mm BOV was most closely related to HBOV4 of Primate bocaparvovirus 2(approximately 68.4%/70.6%, 73.3%/67.6%, and 70.4%/73.1% nucleotide/amino acid identities, respectively). Additionally, phylogenetic analysis revealed that Mm BOV formed an independent peripheral branch, but clustered closely with those of the Primate bocaparvovirus species in the BOV genus(particularly HBOV4). These data strongly suggest that HBOV4 originated from NHP bocaparvoviruses around 200–300 years ago, and that NHPs may act as HBOV reservoirs. Following the International Committee of Taxonomy for Viruses guidelines, we propose Mm BOV as a new species(tentatively named Primate bocaparvovirus 3) in the genus Bocaparvovirus, which is the first report of a novel species of primate BOV. Our data facilitate future research on the genetic diversity and evolution of primate bocaparvoviruses and highlight the importance of bocaparvovirus surveys in wild NHPs. 展开更多
关键词 PRIMATE bocaparvovirus(BOV) NOVEL species MACACA MULATTA Sequence ANALYSIS Phylogenetic ANALYSIS
不同木薯品种上木瓜秀粉蚧空间格局研究 认领
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作者 宋记明 刘光华 +8 位作者 陈青 张林辉 刘倩 李月仙 姜太玲 熊贤坤 周迎春 严炜 段春芳 《植物检疫》 北大核心 2020年第2期13-17,共5页
木瓜秀粉蚧(Paracoccus marginatus)是木薯上一种重要的害虫,明确木薯上该虫空间分布是虫口调查的基础。本文调查获取了多个木薯品种上木瓜秀粉蚧分布数据,采用聚集度指标、Iwao的M*-m回归法、Taylor幂法则、Lα-m回归模型和Z-V模型等... 木瓜秀粉蚧(Paracoccus marginatus)是木薯上一种重要的害虫,明确木薯上该虫空间分布是虫口调查的基础。本文调查获取了多个木薯品种上木瓜秀粉蚧分布数据,采用聚集度指标、Iwao的M*-m回归法、Taylor幂法则、Lα-m回归模型和Z-V模型等方法研究了该粉蚧的空间格局,结果表明木薯上木瓜秀粉蚧在密度较低时呈均匀分布或聚集分布,密度高时呈聚集分布。在木薯叶层上的数量总体呈现下层>中层>上层,在桂热4品种上木瓜秀粉蚧密度较大,桂热891品种上密度最低。 展开更多
关键词 木瓜秀粉蚧 木薯 品种 空间格局
Gold nanoparticles doped metal-organic frameworks as near-infrared light-enhanced cascade nanozyme against hypoxic tumors 认领
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作者 Xinli Liu Yongchun Pan +5 位作者 Jingjing Yang Yanfeng Gao Ting Huang Xiaowei Luan Yuzhen Wang Yujun Song 《纳米研究:英文版》 SCIE EI CAS CSCD 2020年第3期653-660,共8页
We report gold nanoparticles(AuNPs)doped iron-based metal-organic frameworks(GIM)which displays near-infrared light(NIR)-enhanced cascade nanozyme against hypoxic tumors.Due to the strong protein adsorption-induced su... We report gold nanoparticles(AuNPs)doped iron-based metal-organic frameworks(GIM)which displays near-infrared light(NIR)-enhanced cascade nanozyme against hypoxic tumors.Due to the strong protein adsorption-induced surface passivation,AuNPs suffer from the loss of glucose oxidase(GOx)activity.However,GIM could protect the GOx-like activity of AuNPs with the satisfactory shield capability.In addition,GIM exhibited excellent photothermal conversion ability and unique NIR light-enhanced GOx-like activity,which could efficiently increase the endogenous H2O2 production.Meanwhile,as the produced H2O2 is converted by GIM into O2 and highly toxic OH.Thus,GIM-catalyzed cascade reactions with NIR light irradiation not only offer the O2 but also promote the reactive oxygen species(ROS)generation at tumor sites.The produced O2 could be further applied to AuNPs catalytic oxidation of glucose and relieve hypoxic condition of tumor microenvironment(TME).As a proof-of-concept study,GIM demonstrates the admirable tumor ablation under NIR irradiation in vivo. 展开更多
关键词 nanozyme metal-organic frameworks gold nanoparticles near-infrared light reactive oxygen species
The pathological role of ferroptosis in ischemia/reperfusion-related injury 认领
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作者 Hong-Fa Yan Qing-Zhang Tuo +1 位作者 Qiao-Zhi Yin Peng Lei 《动物学研究》 SCIE CAS CSCD 2020年第3期220-230,共11页
Ischemia/reperfusion(I/R) is a pathological process that occurs in numerous organs throughout the human body, and it is frequently associated with severe cellular damage and death. Recently it has emerged that ferropt... Ischemia/reperfusion(I/R) is a pathological process that occurs in numerous organs throughout the human body, and it is frequently associated with severe cellular damage and death. Recently it has emerged that ferroptosis, a new form of regulated cell death that is caused by iron-dependent lipid peroxidation, plays a significantly detrimental role in many I/R models. In this review, we aim to revise the pathological process of I/R and then explore the molecular pathogenesis of ferroptosis. Furthermore,we aim to evaluate the role that ferroptosis plays in I/R, providing evidence to support the targeting of ferroptosis in the I/R pathway may present as a therapeutic intervention to alleviate ischemia/reperfusion injury(IRI) associated cell damage and death. 展开更多
关键词 ISCHEMIA/REPERFUSION Ferroptosis Reactive oxygen species Lipid peroxidation IRON
Therapeutic importance of hydrogen sulfide in age-associated neurodegenerative diseases 认领
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作者 Rubaiya Tabassum Na Young Jeong Junyang Jung 《中国神经再生研究:英文版》 SCIE CAS CSCD 2020年第4期653-662,共10页
Hydrogen sulfide(H2S)is a gasotransmitter that acts as an antioxidant and exhibits a wide variety of cytoprotective and physiological functions in age-associated diseases.One of the major causes of age-related disease... Hydrogen sulfide(H2S)is a gasotransmitter that acts as an antioxidant and exhibits a wide variety of cytoprotective and physiological functions in age-associated diseases.One of the major causes of age-related diseases is oxidative stress.In recent years,the importance of H2S has become clear,although its antioxidant function has not yet been fully explored.The enzymes cystathionineβ-synthase,cystathionineγ-lya-se,and 3-mercaptopyruvate sulfurtransferase are involved in the enzymatic production of H2S.Previously,H2S was considered a neuromodulator,given its role in long-term hippocampal potentiation,but it is now also recognized as an antioxidant in age-related neurodegeneration.Due to aerobic metabolism,the central nervous system is vulnerable to oxidative stress in brain aging,resulting in age-associated degenerative diseases.H2S exerts its antioxidant effect by limiting free radical reactions through the activation of antioxidant enzymes,including superoxide dismutase,catalase,and glutathione peroxidase,which protect against the effects of aging by regulating apoptosis-related genes,including p53,Bax,and Bcl-2.This review explores the implications and mechanisms of H2S as an antioxidant in age-associated neurodegenerative diseases,including Alzheimer’s disease,Parkinson’s disease,Huntington’s disease,and Down syndrome. 展开更多
关键词 3-mercaptopyruvate SULFURTRANSFERASE aging antioxidant cystathionineβ-synthase cystathionineγ-lyase GLUTATHIONE hydrogen sulfide NEURODEGENERATIVE disease oxidative stress reactive oxygen species
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Selective catalytic reduction of NOX with ethanol and other C1-4 oxygenates over Ag/Al2O3 catalysts: A review 认领
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作者 Pavlo I.Kyriienko 《化学科学与工程前沿:英文版》 SCIE EI CAS CSCD 2020年第4期471-491,共21页
Research results regarding selective catalytic reduction(SCR)of NOx with ethanol and other C1-4 oxygenates as reductants over silver-alumina catalysts are summarized.The aspects of the process mechanism,nature of acti... Research results regarding selective catalytic reduction(SCR)of NOx with ethanol and other C1-4 oxygenates as reductants over silver-alumina catalysts are summarized.The aspects of the process mechanism,nature of active sites,role of alumina and silver(especially in the formation of bifunctional active sites),effects of reductants and reaction conditions are discussed.It has been determined that key stages of the process include formation of reactive enolic species,their interaction with NOx and formation of nitroorganic compounds which transform to NCOads species and further to N2.The results obtained over various silver-alumina catalysts demonstrate the perspectives of their application for reducing the level of nitrogen oxides in engine emissions,including in the presence of water vapor and sulfur oxides.Ways to improve the catalysts for the SCR of NOx with C1-4 oxygenates are outined. 展开更多
关键词 SCR nitrogen oxides silver-alumina catalyst silver species ETHANOL OXYGENATES
安徽省高职院校大学生足球运动员运动损伤研究 认领
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作者 凌洪 刘伟 +2 位作者 刘西晓 谢峰 张小田 《安徽水利水电职业技术学院学报》 2020年第2期56-58,共3页
文章运用访谈法、问卷调查法对2018年安徽省高职院校大学生足球队的教练员和运动员进行运动损伤的调查分析。结果表明:安徽省高职院校大学生足球运动员运动损伤发生率较高;损伤部位主要集中在下肢;损伤的种类主要以擦伤、挫伤、扭伤等为... 文章运用访谈法、问卷调查法对2018年安徽省高职院校大学生足球队的教练员和运动员进行运动损伤的调查分析。结果表明:安徽省高职院校大学生足球运动员运动损伤发生率较高;损伤部位主要集中在下肢;损伤的种类主要以擦伤、挫伤、扭伤等为主;运动员场上位置与损伤的发生率有明显相关。 展开更多
关键词 足球 运动损伤 部位 种类
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Spider taxonomy for an advanced China 认领
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作者 Shuqiang Li 《动物分类学报:英文版》 CSCD 2020年第2期73-77,共5页
This paper summarizes the advances and challenges in spider taxonomy of China.A table comparing the number of valid genera and species in China,Europe and the world is provided.To date,the Chinese spider fauna is repr... This paper summarizes the advances and challenges in spider taxonomy of China.A table comparing the number of valid genera and species in China,Europe and the world is provided.To date,the Chinese spider fauna is represented by 5,084 species,under 809 genera in 69 spider families.An"All Species Inventory"of spiders in Xishuangbanna Tropical Botanical Garden provides an example of China’s spider species richness,with more than 782 species recorded within a small area.Intensified research in recent years has grown the national catalog of Chinese spiders from 1,050 species in 1983 to 5,084 species today.There are reasons to believe that spider species richness in China will far exceed this grand total.With enhanced support and investment in spider taxonomic research,many more new species will be discovered and described in China. 展开更多
关键词 EUROPE families GENERA SPECIES WORLDWIDE
The role of graveyards in species conservation and beta diversity:a vegetation appraisal of sacred habitats from Bannu,Pakistan 认领
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作者 Saqib Kamran Shujaul Mulk Khan +5 位作者 Zeeshan Ahmad Amjad Ur Rahman Majid Iqbal Fazal Manan Zahoor Ul Haq Saif Ullah 《林业研究:英文版》 SCIE CAS CSCD 2020年第4期1147-1158,共12页
Graveyards or sacred groves are often places of natural vegetation protected by spiritual believers because of their sacred beliefs and indigenous culture.A study of graveyards was conducted to determine their role in... Graveyards or sacred groves are often places of natural vegetation protected by spiritual believers because of their sacred beliefs and indigenous culture.A study of graveyards was conducted to determine their role in species conservation,community formation,and associated indicators and species composition using multivariate statistical approaches.It was hypothesized that variations in the age of graveyards would give rise to diverse plant communities under the impact of various edaphic and climatic factors.Quantitative ecological techniques were applied to determine various phytosociological attributes.All the data were put in MS Excel for analysis in PCORD and CANOCO softwares for cluster analysis(CA),two-way cluster analysis(TWCA),indicator species analysis and canonical correspondence analysis.CA and TWCA through Sorenson distance measurements identified five major graveyard plant communities:(1)FicusBougainvillea-Chenopodium;(2)Acacia-Datura-Convolvulus;(3)Ziziphus-Vitex-Abutilon;(4)Acacia-Lantana-Salsola;and(5)Melia-Rhazya-Peganum.Species such as Capparis decidua,Herniaria hirsuta,Salvadora oliedes and Populus euphratica were only present inside graveyards rather than outside and advocate the role of graveyards in species conservation.The impact of different environmental and climatic variables plus the age of the graveyards were also assessed for comparison of plant communities and their respective indicator species.The results indicate that higher chlorine concentration,age of graveyards,low soil electrical conductivity,lower anthropogenic activities,higher nitrogen,calcium and magnesium concentrations in the soil,and sandy soils were the strong environmental variables playing a significant role in the formation of graveyard plant communities,their associated indicators and species distribution patterns.These results could further be utilized to evaluate the role of edaphic and climatic factors,indicator species and conservation management practices at a greater scale. 展开更多
关键词 Graveyards/Sacred groves Plant communities Multivariate statistical techniques Indicator species Edaphic factors CONSERVATION PCORD software
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从“秦桑低绿枝”探析《诗经》中的桑文化 认领
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作者 王超佳 周仕慧 《农业考古》 2020年第1期222-227,共6页
《诗经》中的农事诗,较真实地反映了当时农业及其他各种生产活动的状况,其中记载了较多关于桑的情况。《诗经》中的桑主要分布在黄河中上游地区,桑的主要种类是柔桑和家养桑。在农桑稼穑的时代,桑的主要用途是供人们采桑喂蚕,以解决人... 《诗经》中的农事诗,较真实地反映了当时农业及其他各种生产活动的状况,其中记载了较多关于桑的情况。《诗经》中的桑主要分布在黄河中上游地区,桑的主要种类是柔桑和家养桑。在农桑稼穑的时代,桑的主要用途是供人们采桑喂蚕,以解决人们的穿衣问题。蚕桑业是我国古代重要的农业生产部门之一,本文通过对《诗经》中桑的研究,力图基本把握先秦时期人民生活现状,并总结出桑种植在黄河流域的历史变迁,对桑史的研究提供资料。 展开更多
关键词 《诗经》 地理分布 种类 用途
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Allelochemical p-hydroxybenzoic acid inhibits root growth via regulating ROS accumulation in cucumber(Cucumis sativus L.) 认领
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作者 HUANG Cheng-zhen XU Lei +4 位作者 Sun Jin-jing ZHANG Zhong-hua FU Mei-lan TENG Hui-ying YI Ke-ke 《农业科学学报:英文版》 SCIE CAS CSCD 2020年第2期518-527,共10页
Allelopathy is prevalent in agricultural ecosystems and mediated by plant-derived secondary metabolites(allelochemicals).Allelochemicals are released by donor plants and affect the root growth and development of recep... Allelopathy is prevalent in agricultural ecosystems and mediated by plant-derived secondary metabolites(allelochemicals).Allelochemicals are released by donor plants and affect the root growth and development of receptor plants.Allelopathy is responsible for the continuous cropping obstacles in cucumber(Cucumis sativus L.).p-Hydroxybenzoic acid(pHBA),an autotoxin from root exudates of cucumber,has been proposed to be an important allelopathic chemical.However,the molecular mechanism by which pHBA affect root growth and development in cucumber is unknown.Here,we found that pHBA treatment suppressed root growth of cucumber by reducing the meristem activity and cell length.This root growth defect is caused by reduced reactive oxygen species(ROS)accumulation in root tips.After pHBA treatment,the expression levels of several ROS-scavenging-related genes were increased,including peroxidase(POD),catalase(CAT)and metallothionein(MT).Moreover,exogenously application of salicylhydroxamate(SHAM),a peroxidase inhibitor,can partially restore the pHBA treatment induced root growth inhibition.Furthermore,we found that there is natural variation for the inhibitory effect of pHBA on root growth.We also showed that pHBA treatment could maintain higher level of ROS accumulated in the pHBA less sensitive cucumber than that in the pHBA-sensitive cucumber.These results suggest that pHBA inhibits root growth by reducing root tip ROS level in cucumber. 展开更多
关键词 ALLELOPATHY CUCUMBER REACTIVE oxygen species natural variation
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New taxa of Clitumninae from Vietnam(Phasmatodea: Phasmatidae) 认领
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作者 Wai-Chun George Ho 《动物分类学报:英文版》 CSCD 2020年第2期104-117,共14页
In this study,one new genus and seven new species from the Clitumninae of Vietnam are described and illustrated,namely Interphasma lineatum sp.nov.,Medauroidea cattienensis sp.nov.,M.cornuta sp.nov.,M.fasciata sp.nov.... In this study,one new genus and seven new species from the Clitumninae of Vietnam are described and illustrated,namely Interphasma lineatum sp.nov.,Medauroidea cattienensis sp.nov.,M.cornuta sp.nov.,M.fasciata sp.nov.,Neomedaura yokdonensis gen.&sp.nov.,Parapachymorpha pseudospinosa sp.nov.and Prosentoria vietnamensis sp.nov. 展开更多
关键词 Stick insects new genus new species VIETNAM
Species spatial distributions in a warm-temperate deciduous broad-leaved forest in China 认领
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作者 Huiyan Gu Jiaxin Li +1 位作者 Guang Qi Shunzhong Wang 《林业研究:英文版》 SCIE CAS CSCD 2020年第4期1187-1194,共8页
Spatial distribution is fundamental for understanding species coexistence mechanisms in forest communities.Here we comprehensively explored fine-scale spatial patterns of tree species in a secondary warm-temperate dec... Spatial distribution is fundamental for understanding species coexistence mechanisms in forest communities.Here we comprehensively explored fine-scale spatial patterns of tree species in a secondary warm-temperate deciduous broad-leaved forest community in north China.Aggregated distribution patterns were predominant.Species functional traits had no significant effects on their spatial patterns.The aggregation intensity decreased with increasing DBH and abundance.The multivariate linear stepwise regression showed that abundance and maximum DBH were correlated with the aggregation intensity.Our results partially confirm that species attributes(abundance,DBH)and habitat heterogeneity may primarily contribute to spatial patterns and species coexistence in this secondary forest. 展开更多
关键词 Spatial distributions Aggregation intensity Species functional trait Secondary warm-temperate deciduous broad-leaved forest
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Oxyporus(Oxyporus) jiangi sp. nov. and O.(O.) wenchuanus sp. nov.(Coleoptera: Staphylinidae) from Sichuan, China 认领
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作者 Xianghui Yan Yujie Li Fake Zheng 《动物分类学报:英文版》 CSCD 2020年第2期126-134,共9页
Two new species of the subgenus Oxyporus of the genus Oxyporus Fabricius,1775,Oxyporus(Oxyporus)jiangi sp.nov.and O.(O.)wenchuanus sp.nov.from Wolong Natural Reserve,Sichuan Province,China,are described.Thus,the speci... Two new species of the subgenus Oxyporus of the genus Oxyporus Fabricius,1775,Oxyporus(Oxyporus)jiangi sp.nov.and O.(O.)wenchuanus sp.nov.from Wolong Natural Reserve,Sichuan Province,China,are described.Thus,the species of the genus Oxyporus is up to 133 worldwide.Images of the dosal habitus and male sexual characters of the new species are provided.A key to the species of subgenus Oxyporus of Sichuan Province is provided.All type specimens are deposited in College of Life Science,China West Normal University,Sichuan. 展开更多
关键词 STAPHYLINIDAE Oxyporinae Oxyporus new species China
Effects of fertilization and container-type on nutrient uptake and utilization by four subtropical tree seedlings 认领
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作者 Xiuli Chu Xiuhua Wang +2 位作者 Dongbei Zhang Xiaolin Wu Zhichun Zhou 《林业研究:英文版》 SCIE CAS CSCD 2020年第4期1201-1213,共13页
Seedling quality is important for subtropical tree species endangered by the degradation of natural habitats in southern China.At present,the cultural regime for raising these seedlings involving fertilizer levels and... Seedling quality is important for subtropical tree species endangered by the degradation of natural habitats in southern China.At present,the cultural regime for raising these seedlings involving fertilizer levels and size of container is not clear.In this study,seedlings of three endangered species,red-seed tree(Ormosia hosiei),Zhejiang phoebe(Phoebe chekian gensis),and Zhejiang camphor(Cinnamomum japonicum)were evaluated along with red-bark oak(Cyclobalanopsis gilva)as a reference,a species which is not endangered.Seedlings were raised in 2.8,3.6,5.1,and 6.3 L containers and fertilizer applied at 1.0,2.0,3.0 and 4.0 kg m-3.Seedling height and leaf biomass increased in response to higher fertilizer levels while larger containers resulted in greater stem and root biomass.Root biomass of endangered species seedlings did not respond to neither treatments.Zhejiang phoebe seedlings responded to nitrogen and phosphorus uptake but red-seed tree seedlings were unaffected by any nutrient levels.Red-bark oak seedlings had high nitrogen-use efficiency.Based on the results,it is recommended using at least 5.1 L containers to culture Zhejiang phoebe and Zhejiang camphor seedlings with fertilizer at 3.0 kg m-3.Red-bark oak and red-seed tree seedlings should be cultured with 2.0 kg m-3 in smaller containers. 展开更多
关键词 Anthropogenic activities Climate change Container type Vulnerable species
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Enhanced carbon tetrachloride degradation by hydroxylamine in ferrous ion activated calcium peroxide in the presence of formic acid 认领
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作者 Wenchao Jiang Ping Tang +3 位作者 Zhen Liu Huan He Qian Sui Shuguang Lyu 《环境科学与工程前沿(英文)》 SCIE EI CAS CSCD 2020年第2期75-85,共11页
Hydroxyl radicals(HO*)show low reactivity with perchlorinated hydrocarbons,such as carbon tetrachloride(CT),in conventional Fenton reactions,therefore,the generation of reductive radicals has attracted increasing atte... Hydroxyl radicals(HO*)show low reactivity with perchlorinated hydrocarbons,such as carbon tetrachloride(CT),in conventional Fenton reactions,therefore,the generation of reductive radicals has attracted increasing attention.This study investigated the enhancement of CT degradation by the synergistic effects of hydroxylamine(HA)and formic acid(FA)(initial[CT]=0.13 mmol/L)in a Fe(il)activated calcium peroxide(CP)fenton process.CT degradation increased from 56.6%to 99.9%with the addition of 0.78 mmol/L HA to the CP/Fe(II)/FA/CT process in a molar ratio o f 12/6/12/1.The results also showed that the presence of HA enhanced the regeneration of Fe(II)from Fe(III),and the production of HO*increased one-fold when employing benzoic acid as the HO*probe.Additionally,FA slightly improves the production of HO*.A study of the mechanism confirmed that the carbon dioxide radical(C02·),a strong reductant generated by the reaction between FA and HO*,was the dominant radical responsible for CT degradation.Almost complete CT dechlorination was achieved in the process.The presence of humic acid and chloride ion slightly decreased CT removal,while high doses of bicarbonate and high pH inhibited CT degradation.This study helps us to better understand the synergistic roles of FA and HA for HO·and C02·^-generation and the removal of perchlorinated hydrocarbons in modified Fenton systems. 展开更多
关键词 Calcium PEROXIDE HYDROXYLAMINE Modified FENTON REACTIVE oxygen species Perchlorinated HYDROCARBON
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