检索结果-南通市图书馆

Landmark learning by the Ozark zigzag salamander Plethodon angusticlavius

在线全文

学校读者我要写书评

暂无评论

Current Zoology 2011年第4期57卷 485-490页

作者： adam L. CRANE Alicia MATHIS Department of Biology Missouri State University Springfield MO 65897 USA

Although salamanders have been shown to respond to classical conditioning, spatial learning has been largely unstudied. We tested whether salamanders could learn to locate foraging areas by using landmarks. We trained 10 salamanders Plethodon angusticlavius to use landmarks （small rocks） to locate patches within the arena containing food （blackworms Lumbriculus variegatus）. At the comers of each square testing arena were four plastic dishes, one containing blackworms and the other three empty. A rock was placed in front of the dish containing blackworms, and the location of the food-dish was randomly chosen for each training trial. A control group was also trained to feed on blackworms in the presence of a rock, but the rock was positioned randomly among the four dish locations so that the rock was not a reliable landmark for the worms. Although the length of the training period for individual salamanders varied （22-38 trainings per individual）, the mean number of trainings for salamanders in the control and experimental groups was equal （30 training trials）. During testing, no blackworms were present to eliminate any visual or chemical cues emanating directly from the prey. Individuals trained with the rock landmarks spent sig- nificantly more time in the area of the landmark than did control salamanders [Current Zoology 57 （4）： 485-490, 2011].

关键词： Landmark learning Spatial learning Salamander learning Plethodon angusticlavius Beacon

Use of coals and wastes in a co-gasification process aimed at producing hydrogen rich gas

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

International Journal of Coal Science & Technology 2022年第6期9卷 161-167页

作者： Rafal Gssior adam Smoliński Polish Mining Group Inc. KatowicePoland Central Mining Institute KatowicePoland

The use of low-quality coals and flotoconcentrates is currently severely limited,and the problem of managing municipal waste from anthropogenic activities is currently a *** problems of reducing carbon dioxide emissions,utilizing the energy potential of waste and increasing its recycling have an impact on the costs of electricity *** the abundant streams of unused fuels,they can be considered as attractive energy materials,so environmentally-friendly and cost-effective options for their utilization should be developed.A study was conducted using steam co-gasification technology on selected coals,flotation concentrates and Refuse Derived Fuel(RDF)alternative *** low-quality coals were combined with RDF alternative fuel in a process aimed at hydrogen *** experiments produced gas with hydrogen concentrations ranging from 67%(vol.)to 68%(vol.)with low methane *** was observed that the addition of alternative fuels helped to increase the hydrogen concentration in *** was paid to the catalytic ability of the metal oxides contained in the fuel blend,with particular reference to K_(2)O and Al_(2)O_(3)and TiO_(2).

关键词： Coal Hydrogen Flotation concentrate Refuse derived fuel Catalytic capacity Catalysts

The Future of Cosmology and the Role of Non-Linear Perturbations

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

Communications in Theoretical Physics 2012年第2期57卷 323-325页

作者： adam J.Christopherson Astronomy Unit School of Mathematical SciencesQueen Mary University of LondonMile End RoadLondonE1 4NSUK

Cosmological perturbation theory is a key tool to study the *** linear or first order theory is well understood,however,developing and applying the theory beyond linear order is at the cutting edge of current research in theoretical *** this article,I will describe some signatures of non-linear perturbation theory that do not exist at linear order,focusing on vorticity generation at second *** doing so,we discuss why this,among other features such as induced gravitational waves and non-Gaussianities,shows that cosmological perturbation theory is crucial for testing models of the universe.

关键词： cosmology perturbation theory non-linear

在线全文

学校读者我要写书评

暂无评论

反套路面试法

Can a dam type of an alpine lake be derived from lake geometry?A negative result

商业评论 2024年第7期 108-113页

作者：亚当·布莱恩特徐广彤 ExCo集团

"如果时间、经费和人才都不是问题,你会怎样做?"这是Evofem生物技术公司CEO桑德拉·佩尔蒂埃(Saun-dra Pelletier)分享给我的一道面试题.当时我问她是怎样面试求职者的——这也是我在过去十年为《纽约时报》(The New York Times)创作每...

"如果时间、经费和人才都不是问题,你会怎样做?"这是Evofem生物技术公司CEO桑德拉·佩尔蒂埃(Saun-dra Pelletier)分享给我的一道面试题.当时我问她是怎样面试求职者的——这也是我在过去十年为《纽约时报》(The New York Times)创作每周一期的"总裁办公室"系列专栏时,经常与CEO们探讨的主题之一.

关键词：

来源：博看期刊评论

在线全文

博看期刊

学校读者我要写书评

暂无评论

Journal of Mountain Science 2021年第3期18卷 614-621页

作者： adam EMMER Vojtěch CURIN University of Graz Institute of Geography and Regional ScienceCascade|The Mountain Processes and Mountain Hazards GroupGraz 8010Austria Czech Academy of Sciences Prague 16500Czechia Global Change Research Institute Czech University of Life Sciences PragueFaculty of Environmental SciencesBrno 60300Czechia

Glacial lake outburst floods(GLOFs)represent one of the most serious hazard and risk in deglaciating high mountain regions worldwide and the need for GLOF hazard and risk assessment is *** a consequence,numerous region-and nation-wide GLOF assessment studies have been published *** studies cover large areas and consider hundreds to thousands of lakes,prioritizing the hazard posed by ***,certain simplification is required for executing such studies,often resulting in neglecting qualitative characteristics which would need manual *** lake dam types(e.g.,bedrock-dammed,moraine-dammed)are often not distinguished,despite they control GLOF mechanism(dam overtopping/dam breach)and thus GLOF *** this study,we explore the potential of easily measurable quantitative characteristics and four ratios to approximate the lake dam *** dataset of 851 lakes of the Cordillera Blanca suggests that while variances and means of these characteristics of individual lake types differ significantly(F-test,t-test),value distribution of different geometrical properties can’t be used for the originally proposed purpose along the *** only promising results are obtained for extreme values(selected bins)of the *** instance,the low width to length ratio indicates likely morainedammed lake while the high value of ratio indicating round-shape of the lake indicates increased likelihood of bedrock-dammed ***,we report a negative result of our experiment since there are negligible differences of relative frequencies in most of the bins along the spectra.

关键词： Alpine lake High mountain lake GLOFs Glacial lake Moraine-dammed Bedrock-dammed Negative result Cordillera Blanca

Current and emerging trends in prostate cancer immunotherapy

在线全文

学校读者我要写书评

暂无评论

Asian Journal of Andrology 2019年第1期21卷 6-11页

作者： adam Schatz Badar M Mian Division of Urology Albany Medical CollegeAlbany NY 12054USA.

There have been a number of recent developments in the treatment of castration-resistant prostate cancer which seek to exploit the hormonal ***,the castration-resistant prostate cancer remains a major challenge since this is the lethal and incurable phenotype which results in tens of thousands of deaths every *** has been emerging interest in utilizing anticancer immunotherapy in prostate cancer,especially since the development of *** other prostate cancer therapeutic vaccines including autologous and allogeneic vaccines,as well as viral vector-based vaccines,have demonstrated promising results in early trials.

关键词： prostate cancer immunotherapy hormonal axis

Genetic pathways controlling inflorescence architecture and development in wheat and barley

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

Journal of Integrative Plant Biology 2019年第3期61卷 296-309页

作者： adam Gauley Scott A.Boden Department of Crop Genetics John Innes Centre Norwich Research Park

Modifications of inflorescence architecture have been crucial for the successful domestication of wheat and barley, which are central members of the Triticeae tribe that provide essential grains for the human diet. Investigation of the genes and alleles that underpin domestication-related traits has provided valuable insights into the molecular regulation of inflorescence development of the Triticeae, and further investigation of modified forms of architecture are proving to be equally *** identified genes are involved in diverse biological processes, including transcriptional regulation, hormone biosynthesis and metabolism, post-transcriptional and post-translational regulation, which alter inflorescence architecture by modifying the development and fertility of lateral organs, called spikelets and florets. Recent advances in sequencing capabilities and the generation of mutant populations are accelerating the identification of genes that influence inflorescence development, which is important given that genetic variation for this trait promises to be a valuable resource for optimizing grain production. This review assesses recent advances in our understanding of the genes controlling inflorescence development in wheat and barley, with the aim of highlighting the importance of improvements in developmental biology for optimizing the agronomic performance of staple crop plants.

关键词： Genetic pathways Modifications architecture

The Efficacy of the Application of Highly Specialised Surface Engineering Methods in the Economy. Case Study.

在线全文

学校读者我要写书评

暂无评论

材料热处理学报 2004年第5B期25卷 1321-1324页

作者： adam Mazurkiewicz Jerzy Smolik Jan Walkowicz Institute for Terotechnology Pulaskiego 6/10 Radom 26-600 PolandInstitute for Terotechnology Pulaskiego 6/10 Radom 26-600 PolandInstitute for Terotechnology Pulaskiego 6/10 Radom 26-600 Poland

The development of materials technologies, including surface engineering is one of the main trends in the knowledge-based economy. The direct advantages of the application of these technologies are the energy and raw materials saving and the lack of negative influence on the natural environment. The disadvantages are the high equipment and operating costs, the requirement of the highest service qualifications and the necessity to develop specialized technological solutions for different kinds of applications, tools and processes. The potential economic and practical effects are so significant that except for new scientific and technological solutions new innovative organizational solutions are being searched. They should enable an extensive application of innovations in all economy sectors, including SMEs, so the investment possibilities and specialized skills would not constitute decisive limitations. A concept, assumptions, principles of operation and practical implementation of such a model organisational structure - Plasma Technologies Centre of the Institute for Terotechnology (ITeE Radom, Poland) are presented in the article. Development trends directly correlated with the needs of the national market and economy as well as network connections within Framework Programmes of the European Union are depicted. Examples of several highly specialised technological solutions (out of a few dozen solutions implemented in the PTC) and their technological efficacy are described.

关键词：表面工程经营活动经济效益技术功效

Impaired cellulose decomposition in a headwater stream receiving subsurface agricultural drainage

在线全文

学校读者我要写书评

暂无评论

Ecological Processes 2022年第1期11卷 845-861页

作者： Rebecca Poisson adam G.Yates Department of Geography Western UniversityLondonONCanada Department of Biology University of WaterlooWaterloo University200 University Avenue WestWaterlooON N2L 3G1Canada

Background:Agricultural development of former wetlands has resulted in many headwater streams being sourced by subsurface agricultural drainage *** drainage inputs can significantly influence stream environmental conditions,such as temperature,hydrology,and water chemistry,that drive ecological ***,ecological assessments of subsurface drainage impacts are *** assessed the impact of an agricultural drainage system on cellulose decomposition and benthic respiration using a paired stream study in a headwater branch of Nissouri Creek,in Ontario,*** first order segments sourced by a spring-fed marsh and a cropped field with subsurface drainage,as well as the adjoining trunk segment,were sampled over a year using the cotton strip assay to measure cellulose decomposition and benthic ***:Assessments of cellulose decomposition revealed a one-third reduction in the drainage-sourced segment compared to marsh-sourced *** segment differences in cellulose decomposition were associated with reduced summer temperatures in the drainage-sourced *** of stream cooling from the drainage-sourced segment were transmitted downstream as cellulose decomposition was slower than expected throughout the drainage-sourced segment and for several hundred meters down the adjoining trunk *** respiration only differed between the drainage-and marsh-sourced segments in spring,when stream temperatures were ***:Our findings suggest there may be a widespread reduction in cellulose decomposition in streams across similar agricultural regions where subsurface drainage is ***,cooling of streams receiving significant amounts of water inputs from subsurface drainage systems may impart increased resiliency to future climate warming.

关键词： Stream Agriculture Cotton strip assay Seasonality Organic matter breakdown Benthic respiration