检索结果-南通市图书馆

Cavitation resistance of peduncle,petiole and stem is correlated with bordered pit dimensions in Magnolia grandiflora

引用

Plant Diversity 2021年第4期43卷 324-330页

作者： Feng-Ping Zhang jiao-Lin Zhang Timothy j.Brodribb Hong Hu CAS Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMengla 666303YunnanChina College of Traditional Chinese Medicine Yunnan Key Laboratory of Dai and Yi MedicinesYunnan University of Chinese MedicineKunming650500YunnanChina Key Laboratory of Economic Plants and Biotechnology Kunming Institute of BotanyChinese Academy of SciencesYunnan Key Laboratory for Wild Plant ResourcesKunming 650201YunnanChina School of Natural Sciences University of TasmaniaPrivate Bag 55HobartTasmania 7001Australia

Variation in resistance of xylem to embolism among flowers,leaves,and stems strongly influences the survival and reproduction of ***,little is known about the vulnerability to xylem embolism under drought stress and their relationships to the anatomical traits of pits among reproductive and vegetative *** this study,we investigated the variation in xylem vulnerability to embolism in peduncles,petioles,and stems in a woody plant,Magnolia *** analyzed the relationships between water potentials that induced 50%embolism(P50)in peduncles,petioles,and stems and the conduit pit traits hypothesized to influence cavitation *** found that peduncles were more vulnerable to cavitation than petioles and stems,supporting the hypothesis of hydraulic vulnerability segmentation that leaves and stems are prioritized over flowers during drought ***,P50 was significantly correlated with variation in the dimensions of inter-vessel pit apertures among peduncles,petioles and *** findings highlight that measuring xylem vulnerability to embolism in reproductive organs is essential for understanding the effect of drought on plant reproductive success and mortality under drought stress.

关键词： Drought Flower Pit traits Xylem embolism Magnolia

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

Delivery of Micro RNAs by plant virus-based nanoparticles to functionally alter the osteogenic differentiation of human mesenchymal stem cells

引用

Chinese Chemical Letters 2023年第1期34卷 215-220页

作者： Fei Xue jeroen j.L.M.Cornelissen Quan Yuan Shuqin Cao State Key Laboratory of Oral Diseases West China Hospital of StomatologySichuan UniversityChengdu 610041China Department of Molecules&Materials MESA+Institute for NanotechnologyUniversity of TwenteEnschede AE 7500the Netherlands

Micro RNA-26a(miR-26a)has been verified to promote osteogenic differentiation of mesenchymal stem cells in recent *** main obstacles to its application in bone regeneration are instability in the physiological environment and low efficiency of cellular membrane *** overcome these problems,we constructed a novel plant virus gene delivery system based on Cowpea chlorotic mottle virus(CCMV).By encapsulating miR-26a with purified capsid protein(CP)dimers derived from CCMV,CPmiR-26a(CP26a)virus-like particles(VLPs)were ***26a retained a structure similar to the native CCMV and protected miR-26a from digestion with its exterior ***,CP26a featured similar cellular uptake efficiency,osteogenesis promotion ability,and better biocompatibility compared with Lipofectamine2000-miR-26a(lipo26a),which indicated a promising prospect for CCMV as a novel gene delivery system.

关键词： VLPs Cowpea chlorotic mottle virus Gene delivery MicroRNAs Osteogenesis

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

Significance of Stefan blowing effect on flow and heat transfer of Casson nanofluid over a moving thin needle

引用

Communications in Theoretical Physics 2021年第9期73卷 51-58页

作者： A M jyothi R Naveen Kumar R j Punith Gowda B C Prasannakumara Bangalore Institute of Technology BangaloreIndia Department of Studies and Research in Mathematics Davangere UniversityDavangere-577002KarnatakaIndia

The current mathematical model explains the influence of non-linear thermal radiation on the Casson liquid flow over a moving thin needle by considering Buongiorno’s nanofluid *** influences of Stefan blowing,Dufour and Soret effects are also considered in the *** equations which represent the described flow pattern are reduced to ordinary differential equations(ODEs)by using apt similarity transformations and then they are numerically solved with Runge–Kutta-Fehlberg’s fourth fifth-order method(RKF-45)with shooting *** impacts of pertinent parameters on thermal,mass and velocity curves are deliberated *** friction,rate of heat and mass transfer are also discussed *** reveal that,the increase in values of Brownian motion,thermophoresis,Dufour number,heating and radiative parameters improves the heat *** increasing values of the Schmidt number deteriorates the mass transfer but a converse trend is seen for increasing values of the Soret ***,the escalating values of the radiative parameter decays the rate of heat transfer.

关键词： moving thin needle Brownian motion and thermophoretic diffusion non-linear thermal radiation Stefan blowing condition

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

Identification of C9-C11 unsaturated aldehydes as prediction markers of growth and feed intake for non-ruminant animals fed oxidized soybean oil

引用

journal of Animal Science and Biotechnology 2020年第4期11卷 1033-1046页

作者： jieyao Yuan Brian j.Kerr Shelby M.Curry Chi Chen Department of Food Science and Nutrition University of Minnesota1334 Eckles AvenueSt.PaulMN 55108USA USDA-ARS National Laboratory for Agriculture and the Environment 1015 N.University Boulevard2165 NSRICAmesIA 50011USA Oak Ridge Institute for Science and Education Oak RidgeTNUSA.

Background: The benefits of using the oxidized oils from rendering and recycling as an economic source of lipids and energy in animal feed always coexist with the concerns that diverse degradation products in these oxidized oils can negatively affect animal health and performance. Therefore, the quality markers that predict growth performance could be useful when feeding oxidized oils to non-ruminants. However, the correlations between growth performance and chemical profiles of oxidized oils have not been well examined. In this study, six thermally oxidized soybean oils(OSOs) with a wide range of quality measures were prepared under different processing temperatures and processing durations, including 45 °C-336 h;67.5 °C-168 h;90 °C-84 h;135 °C-42 h;180 °C-21 h;and225 °C-10.5 h. Broilers and nursery pigs were randomly assigned to diets containing either unheated control soybean oil or one of six OSOs. Animal performance was determined by measuring body weight gain, feed intake,and gain to feed ratio. The chemical profiles of OSOs were first evaluated by common indicative tests, including peroxide value, thiobarbituric acid reactive substances, p-anisidine value, free fatty acids, oxidized fatty acids,unsaponifiable matter, insoluble impurities, and moisture, and then analyzed by the liquid chromatography-mass spectrometry-based chemometric ***: Among common quality indicators, p-anisidine value(An V), which reflects the level of carbonyl compounds,had the greatest inverse correlation with the growth performance of both broilers and pigs, followed by free fatty acids and oxidized fatty acids. Among the 17 aldehydes identified in OSOs, C9-C11 alkenals, especially 2-decenal and 2-undecenal, had stronger inverse correlations(r jor lipid oxidation products contributing to the An V, ind

关键词： Aldehydes Broiler Growth performance Pig Thermally oxidized soybean oil

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

Extra-pair paternity and antiparasitic defence

引用

Avian Research 2020年第4期11卷 391-397页

作者： Anders Pape Møller jørgen Skavdal Søraker juan joséSoler Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering College of Life SciencesBeijing Normal UniversityBeijing 100875China Ecologie Systématique et Evolution UniversitéParis-SaclayCNRSAgroParisTech91405 OrsayFrance Centre for Biodiversity Dynamics Department of BiologyNorwegian University of Science and TechnologyHøgskoleringen 5No-7491TrondheimNorway Depto.Ecología Funcional y Evolutiva Estación Experimental de ZonasÁridasCtra.Sacramento S/NLa Cañada de San Urbano04120 AlmeríaSpain

Background:Extra-pair paternity(EPP)in birds provides benefits in terms of more offspring,and characteristics for maintenance of this behaviour have been the subject of *** are known to be transmitted during mating,especially when mating with multiple partners,and factors reducing this cost of multiple mating are ***,plumage brightness and colour intensity have been shown to be important traits to benefits from multiple mating as predicted by sexual *** aim of this study was to investigate the relationship between the rate of extra-pair paternity and the relative size of the uropygial gland at the interspecific level,as the uropygial gland is an exocrine gland hypothesized to produce antiparasitic substances and further identified to affect plumage *** of the expected benefits of large uropygial gland in scenarios of sexual selection,we predicted a positive correlation with ***:We collected information from the literature of uropygial gland size and frequency of extra-pair paternity of 60 avian species of different families and explored the predicted positive correlation between *** did so with means of comparative analyses that considered phylogenetic relationship as random factor and included body mass as *** used Markov chain Monte Carlo generalized linear mixed models that were weighted by number of nests used to estimate extra-pair ***:We detected a positive relationship between level of extra-pair paternity and uropygial gland size at an interspecific *** finding is consistent with the ***:We discuss the importance of this result in scenarios of sexual selection and argue that the detected relationship may have arisen by utilizing antiparasitic secretions through secondary sexual characters indicating parasite resistance.

关键词： Antiparasitic defence Costs of extra-pair paternity Microorganisms Uropygial gland Uropygial secretions

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

Understanding human-leopard conflict in the ‘Mid-hill’ region of western Nepal

引用

journal of Mountain Science 2023年第12期20卷 3464-3475页

作者： LAMICHHANE Saroj THAPA Arjun THAPA Mahendra Singh PANTHI Saroj GIORDANO Anthony j School of Forestry and Natural Resources Management Institute of ForestryKirtipur 44613Nepal Institute of Fundamental Research and Studies(InFeRS) Baniyatar 44608Nepal Institute of Zoology Chinese Academy of SciencesBeijing 100101China Institute of Forestry Office of DeanKirtipur 44613Nepal Ministry of Industry TourismForest and EnvironmentKaski 33700Nepal SPECIES-The Society for the Preservation of Endangered Carnivores and their International Ecology Study VenturaCA 93006USA

Livestock rearing and agriculture are the main sources of community-based livelihoods in western *** the rural mid-hills region of Gandaki Province,leopards are the top predator and frequently depredate livestock and attack *** patterns of human-leopard conflicts(HLC) in Nepal are poorly known at the provincial and national scales,which are essential to formulating effective conflict mitigation strategies and implementing them in the *** study aims to analyze the spatiotemporal pattern of HLC by applying Maxent modeling to covariates relating to known and registered conflict cases(n=842) collected from Nepalese government *** found that cases of HLC have been increasing significantly over the past five *** also concluded that mid-elevation,south-facing slopes were more susceptible to HLC,but that mean annual temperature was by far the most important predictor of HLC;overall livestock density and proximity to roads were also important,but secondarily *** we found the increase in human fatalities to 2.16/year was significant(pjuries were down slightly,though not significantly(5.16/year;p>0.05).However,we also found an increasing trend in livestock depredation rates for this same five-year period(p<0.05),which averaged 159.6 head/year among incidents *** also found that winter was the main season when depredations occurred,and that goats were the most depredated of all livestock.A total US $86,892.25($17,378.45/year) of economic losses were incurred by communities during this time,with 78.57% of the total value reimbursed as compensatory relief through the government’s relief *** recommend that the use of predator-proof livestock corrals,greater awareness in local communities about wildlife behavior,better animal husbandry and security practices,and a more efficient compensation program,can improve coexistence between leopard populations and human communities in western Nepal.

关键词： Coexistence Compensation Economic loss Human-wildlife conflict Livestock depredation Maximum entropy Problem animals Sustainable livelihood

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

Sea spray induced air-sea heat and salt fluxes based on the wavesteepnessdependent sea spray model

引用

Acta Oceanologica Sinica 2023年第5期42卷 35-41页

作者： Xingkun Xu joey j.Voermans Changlong Guan Alexander V.Babanin Department of Infrastructure Engineering University of MelbourneVictoria 3010Australia College of Oceanic and Atmospheric Sciences Ocean University of ChinaQingdao 266061China Physical Oceanography Laboratory Ocean University of ChinaQingdao 266061China

Sea spray,which comprises amounts of small ocean droplets,plays a significant role in the air-sea coupling,atmospheric and oceanic dynamics,and ***,it remains arduous to arrive at estimates for the efficiency and accuracy of the sea spray induced air-sea heat and salt *** is because the microphysical process of sea spray evolution in the air is of extreme *** this study,we iteratively calculated the sea spray induced air-sea heat and salt fluxes at various weather *** do so,we implemented one novel wave-steepness-dependent sea spray model into a bulk air-sea fluxes algorithm and utilized other sea spray models as *** on the improved wave-dependent bulk turbulent algorithm,we observed that despite the negative contribution of sea spray to the sensible heat fluxes,the sea spray positively contributes to the air-sea latent heat fluxes,leading to an overall increase in the total air-sea heat *** additional heat fluxes caused by sea spray may be the missing critical process that can clarify the discrepancies observed between measured and modelled Tropical Cyclone’s development and *** addition to heat fluxes,we observed that sea spray has significant impacts on the air-sea salt *** the sea salt particles are one of the main sources of the atmosphere aerosol,our results imply that sea spray could impact global and regional ***,given the significance of sea spray on the air-sea boundary layer,sea spray effects need to be considered in studies of air-sea interaction,dynamics of atmosphere and ocean.

关键词： sea spray air-sea heat fluxes air-sea salt fluxes wave

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

Progress of amino acid nutrition for diet protein reduction in poultry

引用

journal of Animal Science and Biotechnology 2021年第3期12卷 819-827页

作者： M.T.Kidd C.W.Maynard G.j.Mullenix Center of Excellence for Poultry Science Division of AgricultureUniversity of Arkansas SystemFayettevilleAR 72701USA

There is growing interest among nutritionists in feeding reduced protein diets to broiler *** nearly a century of research has been conducted providing biochemical insights on the impact of reduced protein diets for broilers,practical limitation still *** present review was written to provide insights on further reducing dietary protein in *** construct this review,eighty-nine peer reviewed manuscripts in the area of amino acid nutrition in poultry were ***,nutritional research areas of low protein diets,threonine,glycine,valine,isoleucine,leucine,phenylalanine,histidine,and glutamine have been assessed and combined in this text,thus providing concepts into reduced protein diets for *** addition,linkages between the cited work and least cost formation ingredient and nutrient matrix considerations are *** conclusion,practical applications in feeding reduced protein diets to broilers are advancing,but more work is warranted.

关键词： Amino acid Broiler chicken Glutamine Histidine Low protein Threonine Valine

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

Climatic niche breadths of the Atlantic Forest snakes do not increase with increasing latitude

引用

Current Zoology 2022年第5期68卷 535-540页

作者： josé Thales da Motta Portillo Fausto Erritto Barbo Ricardo j.Sawaya Programa de Pós-Graduação em Biologia Animal Instituto de BiociênciasLetras e Ciências ExatasUniversidade Estadual Paulista“Júlio de Mesquita Filho”Rua Cristóvão Colombo2265São Josédo Rio PretoSão Paulo 15054-000BrazilLaboratório de Coleções ZoológicasInstituto ButantanAvenida Vital Brazil1500São Paulo 05503-900Braziland Centro de Ciências Naturais e HumanasUniversidade Federal do ABCRua Arcturus03São Bernardo do CampoSão Paulo 09606-070Brazil

The climatic niche is a central concept for understanding species distribution,with current and past climate interpreted as strong drivers of present and historical-geographical *** aim is to understand whether Atlantic Forest snakes follow the general geographical pattern of increasing species climatic niche breadths with increasing *** also tested if there is a tradeoff between temperature and precipitation niche breadths of species in order to understand if species with larger breadths of one niche dimension have stronger dispersal constraints by the other due to narrower niche *** breadths were calculated by the subtraction of maximal and minimal values of temperature and precipitation across species *** implemented Phylogenetic Generalized Least Squares to measure the relationship between temperature and precipitation niche breadths and *** also tested phylogenetic signals by Lambda statistics to analyze the degree of phylogenetic niche conservatism to both niche *** niche breadths were not related to *** niche breadths decreased with increasing latitude and presented a high phylogenetic signal,that is,significant phylogenetic niche *** rejected the tradeoff hypotheses of temperature and precipitation niche *** results also indicate that precipitation should be an important ecological constraint affecting the geographical distribution of snake lineages across the South American Atlantic *** then provide a general view of how phylogenetic niche conservatism could impact the patterns of latitudinal variation of climatic niches across this biodiversity hotspot.

关键词： Atlantic Forest biogeography climatic niche latitudinal gradient snakes

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

Unsupervised ore/waste classification on open-cut mine faces using close-range hyperspectral data

引用

Geoscience Frontiers 2023年第4期14卷 89-99页

作者： Lloyd Windrim Arman Melkumyan Richard j.Murphy Anna Chlingaryan Raymond Leung Rio Tinto Centre for Mine Automation Australian Centre for Field RoboticsThe University of SydneySydney 2006Australia

The remote mapping of minerals and discrimination of ore and waste on surfaces are important tasks for geological applications such as those in *** tasks have become possible using ground-based,close-range hyperspectral sensors which can remotely measure the reflectance properties of the environ-ment with high spatial and spectral ***,autonomous mapping of mineral spectra mea-sured on an open-cut mine face remains a challenging problem due to the subtleness of differences in spectral absorption features between mineral and rock classes as well as variability in the illumination of the *** additional layer of difficulty arises when there is no annotated data available to train a supervised learning algorithm.A pipeline for unsupervised mapping of spectra on a mine face is pro-posed which draws from several recent advances in the hyperspectral machine learning *** proposed pipeline brings together unsupervised and self-supervised algorithms in a unified system to map minerals on a mine face without the need for human-annotated training *** pipeline is eval-uated with a hyperspectral image dataset of an open-cut mine face comprising mineral ore martite and non-mineralised *** combined system is shown to produce a superior map to its constituent algo-rithms,and the consistency of its mapping capability is demonstrated using data acquired at two differ-ent times of day.

关键词： Hyperspectral imaging Mineral mapping Open-cut mine face Machine learning Convolutional neural networks Illumination invariance

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

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：