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Kinetics of the Oxidative Dehydrogenation of Isobutane over Cr_2O_3/La_2(CO_3)_3

作者： edited by Mark robson.

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Journal of Natural Gas Chemistry 2002年第1期11卷 70-78页

作者： Yanping Sun Tracey A.robson Trevor C.Brown School of Biological Biomedical and Molecular Sciences University of New England Armidale NSW 2351 Australia

The oxidative dehydrogenation (ODH) of isobutane over Cr_2O_3/La_2(CO_3)_3 has been investigated in a low-pressure Knudsen cell reactor, under conditions where the kinetics of the primary reaction steps can be accurately determined. By heating the catalyst at a constant rate from 150-300℃, temperature fluctuations due to non-equilibrium adsorption are minimized. The evolved gas profiles show that ODH to isobutene and water is a primary reaction pathway, while carbon dioxide, which forms from the catalyst during reaction, is the only other product. This CO2 evolution may enhance the activity of the catalyst. Isobutene formation proceeds with the participation of lattice oxygen from the Cr2O3/La2(CO3)3 catalyst. The intrinsic Arrhenius rate constant for the ODH of isobutane isk(s-1) = 1011.5±2.2exp{-((55±5) -ΔHads kJmol-1)/RT}The small pre-exponential factor is expected for a concerted mechanism and for such a catalyst with a small surface area and limited porosity.

关键词： catalytic kinetics oxidative dehydrogenation molecular flow isobutane isobutene,Cr_2O_3/La_2(CO_3)_3

A survey of semantic web technology for agriculture

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Information Processing in Agriculture 2019年第4期6卷 487-501页

作者： Brett Drury robson Fernandes Maria-Fernanda Moura Alneu de Andrade Lopes ICMC University of Sa˜o Paulo-Av.Trabalhador Sa˜o-carlense400CentroSa˜o CarlosSP 13566-590Brazil Embrapa Agriculture Informatics-Av.Dr.Andre´Tosello 209 CidadeUniversita´ria CampinasSPBrazil Scicrop Rua Henrique Monteiro90-14 Andar-PinheirosSa˜o PauloSPBrazil

Semantic web technologies have become a popular technique to apply meaning to unstructured *** have been infrequently applied to problems within the agricultural domain when compared to complementary *** this lack of application,agriculture has a large number of semantic resources that have been developed by large NGOs such as the Food and Agriculture Organization(FAO).This survey is intended to motivate further research in the application of semantic web technologies for agricultural problems,by making available a self contained reference that provides:a comprehensive review of preexisting semantic resources and their construction methods,data interchange standards,as well as a survey of the current applications of semantic web technologies.

关键词： Knowledge Representation Semantic web technology Ontologies Linked data Survey

中国金丝桃属金丝桃组(藤黄科)新分类群(英文)

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植物分类学报 2005年第3期43卷 271-277页

作者： Norman K.B.robson Department of Botany The Natural History Museum Cromwell Road London SW7 5BD

描述了中国云南北部的金丝桃属Hypericum L.(藤黄科)两个新种,即楚雄金丝桃H. fosteri N. robson和漾濞金丝桃H. wardianum N. robson。二者均与短柱金丝桃H. hookerianum Wight & Arn.相近。楚雄金丝桃为一地方特有种,目前仅在模式地... 详细信息

描述了中国云南北部的金丝桃属Hypericum L.(藤黄科)两个新种,即楚雄金丝桃H. fosteri N. robson和漾濞金丝桃H. wardianum N. robson。二者均与短柱金丝桃H. hookerianum Wight & Arn.相近。楚雄金丝桃为一地方特有种,目前仅在模式地点发现;漾濞金丝桃在缅甸东北部还有分布。二者主要以蒴果伸长,非卵状近球形,萼片无中脉而有别于短柱金丝桃。此外,将宽萼金丝桃H. latisepalum (N. robson) N. robson从亚种提升为种;将变异较大的纤枝金丝桃H. lagarocladum N. robson划分为两个亚种,即叶较宽、具有开张习性的原亚种纤枝金丝桃H. lagarocladum ssp. lagarocladum和叶较窄、更为直立的新亚种狭叶金丝桃H. lagarocladum ssp. angustifolium N. robson。

关键词：中国金丝桃属金丝桃组藤黄科新分类群新种楚雄金丝桃漾濞金丝桃

Lipoprotein metabolism in nonalcoholic fatty liver disease

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The Journal of Biomedical Research 2013年第1期27卷 1-13页

作者： Zhenghui Gordon Jiang Simon C. robson Zemin Yao Department of Medicine Beth Israel Deaconess Medical Center/Harvard Medical SchoolBostonMAUSA Division of Gastroenterology CLS612Beth Israel Deaconess Medical Center/Harvard Medical SchoolBostonMAUSA Department of Biochemistry Microbiology and ImmunologyOttawa Institute of Systems BiologyUniversity of OttawaOttawaOntario KIH 8M5Canada

Nonalcoholic fatty liver disease （NAFLD）, an pathologies characterized by fatty accumulation in escalating health problem worldwide, covers a spectrum of hepatocytes in early stages, with potential progression to liver inflammation, fibrosis, and failure. A close, yet poorly understood link exists between NAFLD and dyslipidemia, a constellation of abnormalities in plasma lipoproteins including triglyceride-rich very low density lipoproteins. Apolipoproteins are a group of primarily liver-derived proteins found in serum lipoproteins; they not only play an extracellular role in lipid transport between vital organs through circulation, but also play an important intracellu- lar role in hepatic lipoprotein assembly and secretion. The liver functions as the central hub for lipoprotein metab- olism, as it dictates lipoprotein production and to a significant extent modulates lipoprotein clearance. Lipoprotein metabolism is an integral component of hepatocellular lipid homeostasis and is implicated in the pathogenesis, potential diagnosis, and treatment of NAFLD.

关键词： nonalcoholic fatty liver disease (NAFLD) hepatic steatosis nonalcoholic steatohepatitis apolipo-protein lipoprotein metabolism very low density lipoprotein

Abiotic stress on seed germination and plant growth of Zeyheria tuberculosa

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林业研究:英文版 2023年第5期34卷 1511-1522页

作者： robson Luis Silva de Medeiros Rinaldo Cesar de Paula Joao Vitor Oliveira de Souza Joao Pedro Peixoto Fernandes Department of Agricultural Sciences School of Agricultural and Veterinarian SciencesSao Paulo State University(Unesp)14884-900JaboticabalSao PauloBrazil

Zeyheria tuberculosa(Vell.)Bureau ex *** among the Brazilian flora threatened with *** has high-quality wood and can be used to recover herbicidecontaminated ***,abiotic stresses can harm seed germination and seedling development under adverse conditions and need to be understood to improve autochthonous or indigenous biodiversity conservation and strengthen reforestation *** study evaluated the effects of temperature,water and saline stress on *** seed germination and water stress on seedling *** laboratory experiments evaluated germination under:(1)different temperatures(20,25,30,35 and 40℃);(2)different water potentials simulated with polyethylene glycol(PEG6000)at 25 and 30℃;and,(3)different osmotic potentials simulated with NaCl at 25 and 30℃.In addition,a greenhouse experiment subjected seedlings to five water regimes(20%,35%,50%,65%and 80%of maximum substrate water holding capacity).In the laboratory,seedling biometry and germination were evaluated,while physiological and morphological parameters were assessed in the *** potential of seeds increased at 25 and 30℃.Germination and vigor decreased as water and saline stresses *** tolerance thresholds for water and salt stresses were-0.6 and-0.4 MPa,*** the greenhouse,the most restrictive water regimes reduced seedling physiological and morphological *** development was compromised at moisture levels below50%field capacity.

关键词： Bignoniaceae Climate change Ipê-felpudo Ipê-preto Water stress

Parity Violation in Weak Nuclear Interactions

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Journal of High Energy Physics, Gravitation and Cosmology 2022年第2期8卷 330-344页

作者： Brian Albert robson Department of Fundamental and Theoretical Physics Research School of Physics The Australian National University Canberra Australia

The treatment of parity violations in the weak nuclear interactions is discussed within the frameworks of both the Standard Model (SM) and the Generation Model (GM) of particle physics. It will be demonstrated that several important differences between these two models lead to the SM merely describing the parity violations, while the GM provides an understanding of the cause of the parity violations in weak nuclear interactions. The significant differences arising from several dubious assumptions made during the development of the SM, lead to very different conclusions concerning the nature of the parity violations in the two models. While the SM is able to describe the observed parity violations in terms of a “V-A” theory of the weak nuclear interactions, the GM is also able to demonstrate the cause of the observed parity violations: in the GM, the observed parity violations arise as a consequence of the negative intrinsic parity of both the W massive bosons, which mediate these so-called charge-changing (CC) weak nuclear interactions.

关键词： Standard Model Generation Model Parity Violation

Drying of pasty and granular materials in mechanically and conventional spouted beds

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Particuology 2019年第1期17卷 176-183页

作者： robson C. Sousa Maria C. Ferreira Haritz Altzibar Fábio B. Freire José T. Freire Rural and Chemical Engineering Department Federal University of Espirito SantoAlegreES. Brazil Chemical Engineering Department Federal University of Sao CarlosSao CarlosSPBrazil Chemical Engineering Department University of Basque CountryBilbaoSpain

A contactor vessel was built to operate as either a mechanically or a conventional spouted bed for the purpose of analyzing the drying of pasty and granular materials under comparable conditions in both configurations. A classical conical–cylindrical spouted bed with a 60° conical base and an air inlet central orifice was modified to enable the switch by introducing in the vessel’s center an open helicoidal conveyor screw placed above the air inlet orifice. This screw is removable and conveniently returns the bed to its conventional spouted configuration. Experiments on drying solutions (calcium carbonate suspensions and skimmed milk) and granular materials (porous alumina particles) were performed for various bed parameter settings. The spouting pressure drop, outlet air temperature, and relative humidity were measured over time under different conditions. Mechanical agitation is proved effective in drying diluted carbonate calcium liquid suspensions and coarse porous alumina particles at an air velocity approximately 50% lower in comparison to drying in a conventional spouted bed. The conventional spouted bed performed better at drying liquid skimmed milk as the mechanical agitation combined with the axial inlet air flow is not effective in mitigating sticking and powder agglomeration in the bed when handling pastes of complex composition. Introducing mechanical agitation in the designed setup broadens the operating range of a conventional spouted bed with axial air flow in the inlet.

关键词： Characteristic curve Drying kinetic Spouted-bed dynamics Mechanical agitation Alumina particles Paste drying

Reproductive Mode of Fejervarya limnocharis (Anura:Ranidae) Caught from Mae Sot,Thailand Based on Its Gonadosomatic Indices

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Asian Herpetological Research 2011年第1期2卷 41-45页

作者： Mohd Sham OTHMAN Wichase KHONSUE Jirarach KITANA Kumthorn THIRAKHUPT Mark Gregory robson Noppadon KITANA International Postgraduate Programs in Environmental Management Graduate SchoolChulalongkorn University National Center of Excellence for Environmental and Hazardous Waste Management (NCE-EHWM) Chulalongkorn University Department of Biology Faculty of ScienceChulalongkorn University Environmental Health Program Faculty of Allied Health SciencesUniversiti Kebangsaan MalaysiaJalan Raja Muda Abdul Aziz50300 Kuala LumpurMalaysia School of Environmental and Biological Sciences RutgersThe State University of New JerseyNew Jersey 08901-8525USA Thai Fogarty International Training and Research in Environmental and Occupational Health Center NIH FIC 43TW007849 Chulalongkorn University

Amphibians show a variety of reproductive modes and strategies. The cyclicity and continuity of reproduction can often be predicted from the annual gonadosomatic index trends in a species specific manner. This research aims to document the female and male gonadosomatic index profiles and to ascertain the reproductive cyclicity or continuity of Fejervarya lirnnocharis （Anura： Ranidae） caught in Mac Sot, Tak Province, Thailand. Frogs were collected monthly between November 2007 and October 2009 in rice fields and their surrounding areas in the study site. For each frog, total weight and ovarian/testicular weight were measured to obtain the female and male gonadosomatic index. The number of female individuals with mature eggs （postvitellogenic eggs） was also counted. The results showed that female frogs had two main surges of increased GSI in March and September of 2008. Alternatively, male frogs showed a more gradual increase and decrease in gonadosomatic index, thus the index remaining high throughout the year. This study concluded that while F. limnocharis in this area is essentially a continuous breeder, it is more optimized for a cyclic reproduction mode with two breeding cycles during the rainy season.

关键词： rice flog cyclic reproduction egg deposition GSI profile