检索结果-南通市图书馆

Hotspot of Adult Cuban Treefrog and Cane Toad Multi-organ Abnormality in Suburban South-west Florida

在线全文

学校读者我要写书评

暂无评论

Asian Herpetological Research 2020年第2期11卷 139-154页

作者： Sharon Pratt ANZALDUA javier GOLDBERG Private University 27427 Horne Ave Bonita SpringsFlorida 34135USA Instituto de Bio y Geociencias del NOA(IBIGEO-CONICET) CCT-Salta9 de Julio 14Rosario de LermaSalta 4405Argentina

This study represents a continuation of the Florida hotspot of tadpole abnormality found in the Southwest Florida suburban roadside drainage ditches in 2012 to determine if the adult frogs and toads frequenting the study sites were anatomically *** gross examination of all organs included 397 adult anurans and 40 metamorphs representing five anuran species:Osteopilus septentrionalis(N=364),Rhinella marina(N=60),Lithobates sphenocephala(N=7),Anaxyrus terrestris(N=5)and Anaxyrus americanus(N=1).The gonads,liver,kidney and intestines were abnormal at a frequency of 87.4%.The few normal anurans(12.6%)were females and young male *** found a significant difference in organ abnormality type and f requency between *** all f rog and toad males had testicular abnormality(92%)with only 6%with normal testes,whereas the female gonad abnormality was lower,at 41.6%.Hermaphroditism was found in both sexes at a frequency of 26.2%.The toads had a significantly higher frequency of hermaphroditism than the *** toad hermaphroditism frequency was found to be 40%,whereas the frog hermaphroditism 23.3%.A hermaphrodite Cane toad male with a female phenotype coexisted with the normal male phenotype *** fertility of 27 in situ pairs was *** fertile testicular abnormal male and hermaphrodite pairs produced offspring with abnormal larval *** information adds new evidence of the effect of chemicals on wild populations and the effect on non-target species which has always been underestimated.

关键词： gonad hermaphrodite malformation Osteopilus septentrionalis Rhinella marina

Ceria on alumina support for catalytic pyrolysis of Pavlova sp. microalgae to high-quality bio-oils

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2018年第3期27卷 874-882页

作者： Tevfik Aysu javier Fermoso Aimaro Sanna Institute of Mechanical Process and Energy Engineering (IMPEE) Heriot-Watt University Department of Chemistry Faculty of Education Yuzuncu Yil University

In this work,we report for the first time the in-situ catalytic pyrolysis of Pavlova ***,which has been performed in a fixed-bed reactor in presence of Ce/Al2O3-based *** effects of pyrolysis parameters,such as temperature and catalyst were studied on the products yield distribution and biooil composition,among *** showed that all catalysts increased the bio-oil yield with respect to the non-catalytic runs and reduced the O/C ratio from 0.69（Pavlova sp.）to 0.1–0.15,which is close to that of crude *** terms of bio-oil oxygen content,Mg Ce/Al2O3presented the best performance with a reduction of more than 30%,from 14.1 to 9.8 wt%,of the oxygen concentration in comparison with thermal ***,Ni Ce/Al2O3gave rise to the highest aliphatics/aromatics *** elemental and gas analysis indicates that N was partially removed from the catalytic bio-oils in the gas phase in forms of NH3and HCN.

关键词： Bio-oil Pavlova sp. Pyrolysis Deoxygenation Catalyst Ceria

Allophane as a Nanotechnological Additive in Masonry Materials to Increase Resistance and Waterproofing

在线全文

学校读者我要写书评

暂无评论

Advances in Materials Physics and Chemistry 2024年第8期14卷 196-212页

作者： Edward H. Jiménez Joao Rivera Juan H. Villalba Paola E. Vera Marlon Cuenca Belén Granja javier Fuentes Sandra Gavilanes Daniel Hidalgo Fernando Garcia Jose Bermudez Washington Ruiz Alexis Martial Debut Facultad de Ingeniera Qumica Universidad Central del Ecuador Quito Ecuador Facultad de Arquitectura y Urbanismo Universidad Central del Ecuador Quito Ecuador Nanomaterials Characterization Laboratory Universidad de las Fuerzas Armadas ESPE Sangolqu Ecuador

The constant need for high-strength materials in the construction industry promotes the research of additives that improve the properties of masonry materials. The use of allophane as an additive in concrete and mortar mixtures was implemented to improve their strength and waterproofing, respectively, using compression and water absorption tests according to their corresponding standards (ASTM C1231, ASTM D2938, and ASTM C1585). The samples were evaluated at different concentrations and curing ages. In addition, different sand/cement ratios were considered for the mortar. The results revealed that there was a 9.4% increase in compressive strength in concrete and a 23.7% reduction in water absorption in mortar for the 5:1 ratio. These changes would be the result of the interaction of the nanoporous additive in the atomic crystal structure of the material demonstrating the nanotechnological nature of allophane.

关键词： Allophane Nano Additive Strength Impermeability Concrete Mortar

Lie Symmetries of Quasihomogeneous Polynomial Planar Vector Fields and Certain 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

Acta Mathematica Sinica,English Series 2005年第1期21卷 185-192页

作者： javier CHAVARRIGA Isaac A.GARCIA Departament de Matemdtica Universitat de LleidaAvda.Jaume II6925001LleidaSpain

In this work we study Lie symmetries of planar quasihomogeneous polynomialvector fields from different points of view, showing its integrability. Additionally, we show thatcertain perturbations of such vector fields w... 详细信息

关键词： Lie symmetries Quasi-homogeneous systems Planar vector fields

在线全文

学校读者我要写书评

暂无评论

巴特罗公寓楼梯与中庭室内设计

城市环境设计 2024年第1期147卷 24-27页

作者： javier Villar Jaime Fernandez Calvache Gorka Beita Zarandona David Minton Albero Mila Dimitrovska Kimio Suzuki(CG) IMAGENSUBLIMINAL

本项目是对高迪在巴特罗公寓中对地中海光线的天才使用的致敬。巴特罗公寓8层通高的中庭能够获取自然光，并将其均匀分布在建筑的各个角落，而在这个项目中，这种光线的垂直传递是在原有应急楼梯的8层封闭空间内进行的，使用一系列悬挂...

本项目是对高迪在巴特罗公寓中对地中海光线的天才使用的致敬。巴特罗公寓8层通高的中庭能够获取自然光，并将其均匀分布在建筑的各个角落，而在这个项目中，这种光线的垂直传递是在原有应急楼梯的8层封闭空间内进行的，使用一系列悬挂式铝板来捕捉光线（在这里是人造光），目的是从明亮的屋顶到地下黑暗深处的旧煤窑创造一系列不断变化的体验。

关键词：

来源：博看期刊

Model of Mediating Determinants of Time Differences in INDYCAR

在线全文

学校读者我要写书评

暂无评论

Journalism and Mass Communication 2024年第4期14卷 232-240页

作者： Wilfrido Isidro Aldana Balderas Héctor Daniel Molina Ruiz Enrique Martínez Muñoz Eleazar Villegas González Tirso javier Hernández Gracia Arturo Sánchez Sánchez Cruz García Lirios Alfredo Barrera Escobar University of México HuehuetocaMèxico University of Hidalgo PachucaMèxico University of Tlaxcala Mèxico University of CDMX Mexico University of FV Mexico

The IndyCar series distinguishes itself by providing the same design and operation of the single-seater to its *** difference in times is then attributable to the skills of the drivers,but considering the data from the races could test this *** objective of this work was to establish a trajectory model to predict race times.A cross-sectional,correlational,and explanatory work was carried out with a sample of 18,474 records in the period from 2020 to 2023 of the IndyCar *** results show that the time span predicts the time *** relation to the studies of acceptance of the technology,the adjustment of this to human capacities to explain the time differences in the series of racing cars is discussed.

关键词： time differences ranking differences ranking race time laps completed

Cyber-applications as gateway to data-rich Digital Earth systems

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 Digital Earth 2014年第7期7卷 576-593页

作者： javier Morales Rolf A.de By Department of Geo-Information Processing Faculty of Geo-Information Science and Earth ObservationUniversity of TwenteEnschedethe Netherlands

The underlying vision of the Digital Earth(DE)calls for applications that can embed vast quantities of geo-referenced data and allow users to study and analyse of our *** the declaration of this vision in the late 90s,a significant number of DE data-sets have been created by the industry,governments,non-governmental organisations and *** overwhelming majority of the successful applications that use DE data-sets has its end-user applications running on the *** these applications are great tools,they remain inaccessible to the community as a *** this paper,we present a framework for the development of *** define an abstract architecture for cyber-applications based on the model-view-controller paradigm,which allows the dynamic inclusion of functional and data components into its execution engine at *** define the operational characteristics of *** also specify the interface of pluggable components to the ***,we demonstrate the appropriateness of the abstract architecture by means of a case study.

关键词： digital earth architecture cyber-application geobrowser design framework hardware independence

Astroglial heterogeneity:merely a neurobiological question? Or an opportunity for neuroprotection and regeneration after brain injury?

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

Neural Regeneration Research 2016年第11期11卷 1739-1741页

作者： Alberto javier Ramos Laboratorio de Neuropatología Molecular Instituto de Biología Celular y Neurociencia "Prof.E.De Robertis" UBA-CONICETFacultad de MedicinaUniversidad de Buenos Aires

Pioneer studies by Ramon y Cajal in the early nineteenth century evidenced that astrocytes are a heterogeneous cell population. The initial division of the glial family proposed by Rudolf Albert von Kolliker and William Lloyd Andriezen that separated glia into two groups, fibrous glia and protoplasmic glia, was further refined by Ramon y Cajal,

关键词： Or an opportunity for neuroprotection and regeneration after brain injury

Glaucoma and amyotrophic lateral sclerosis,two kindred diseases?

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2016年第9期11卷 1415-1417页

作者： Francisco javier Carreras Surgery Department Faculty of MedicineUniversity of Granada

Amyotrophic lateral sclerosis （ALS）, a predominantly sporadic disease with unknown etiology and pathogeny, is a member of a group known as motor neuron diseases （MND）. The heterogeneity of the clinical presentation of the disease is a fundamental aspect of ALS and is de- termined by the variable engagement of its upper motor neuron （UMN） and lower motor neuron （LMN） components （Ravits and La Spada, 2009）.

关键词： RGCs Glaucoma and amyotrophic lateral sclerosis,two kindred diseases Figure