700,770 research outputs found
Open access indicators and information society: the Latin American case
No full textPurpose – The purpose of this paper is to estimate open access penetration ratios through cross-analysis of existing social context and open access indicators in Latin America. Design/methodology/approach – The following parameters were used to characterize the chosen countries. On one hand, it takes social context indicators like digital opportunity index (DOI), GDP 2007 (Organization for Economic Co-operation and Development) (www.oecd.org/home/0,3305,e n_2649_201185_1_1_1_1_1,00.html), scientific output 2005, and investment in science and technology vs GDP 2004. On the other hand, it analyses open access indicators considering the two main open access strategies – the green and gold routes – and the existing legal framework.
Findings – This paper discusses the evolution of DOI and compares with open access parameters (numbers of repositories, number of registries in repositories, DOAJ journals and number of creative commons licences) in the context of scientific information in developing countries in Latin America. Research limitations/implications – This paper is not an exhaustive survey and limits the comparison to the Latin American Countries, focalized in Brazil, Chile and Argentina. Originality/value – This paper gives an overview of the situation of three particular countries: Brazil, Chile and Argentina, and explains the position of these countries in the open access movement in Latin America
INMARVAL - DOI References. Publications by research team
No full textSe recopila un listado de referencias DOI relativas a publicaciones de miembros del equipo investigador y del equipo de trabajo. Estas publicaciones se enmarcan en un proyecto de investigación I+D, concedido por el Ministerio de Ciencia e Innovación durante el periodo 2022-2025 y bajo el título: INMIGRACION MARITIMA, ESTRATEGIAS DE SEGURIDAD Y PROTECCION DE VALORES EUROPEOS EN LA REGIÓN DEL ESTRECHO DE GIBRALTAR (INMARVAL
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Molecular mass of poly[(R)-3-hydroxybutyric acid] produced in a recombinant Escherichia coli
No full textPoly[(R)-3-hydroxybutyric acid] (PHB) was produced at 37 degrees C by a recombinant Escherichia coli harboring the Alcaligenes eutrophus biosynthesis phb-CAB genes in Luria-Bertani media containing glucose at 10-30 g/l at different pH values and the time-dependent changes in the molecular mass of PHB were studied. PHB polymers accumulated within cells while glucose was present in the medium. The number-average molecular mass of PHB decreased with time during the course of PHB accumulation, and the values for PHB were markedly dependent on the cultivation conditions of the E. coli, ranging from 0.5 MDa to 20 MDa. Under specific conditions (pH 6.0), E. coli produced PHB with an extremely high molecular mass (20 MDa). It has been suggested that a chain-transfer agent is generated in E. coli cells during the accumulation of PHB.Dr. C. K. Kang is gratefully acknowledged for
his contribution to this work. This study was supported in part by
the Special Coordination Research Fund of the Science and
Technology Agency, Japan
Enrichment of specific monomer in medium-chain-length poly(3-hydroxyalkanoates) by amplification of fadD and fadE genes in recombinant Escherichia coli
No full textRecombinant Escherichia coli strains defective in FadA and/or FadB harboring the Pseudomonas sp. 61-3 polyhydroxyalkanoate (PHA) synthase gene (phaC2(Ps)) were constructed, and were examined for the production of medium-chain-length (MCL) PHA from sodium decanoate and sodium dodecanoate. All the recombinant E. coli strains accumulated MCL-PHAs mainly composed of C6, C8 and C10 monomers from decanoate and those composed of C8, C10 and C12 monomers from dodecanoate. A new metabolic engineering strategy for enriching specific monomers in MCL-PHA was developed by examining the effect of co-expressing the E. coli fadD(Ec), fad(Ec), and/or fadL(Ec) genes along with the PHA synthase gene. Using these engineered E coli strains, MCL-PHAs enriched in 3-hydroxydecanoate up to 80 mol% and 3-hydroxydodecanoate up to 48 mol% were produced from sodium decanoate and sodium dodecanoate, respectively. It was found that the amplification of the fadD(Ec), fadE(Ec) or fadL(Ec) gene had different effect on the monomer composition of MCL-PHA. Among these, the amplification of the fadD(Ec) gene had the most significant effect on the alteration of monomer composition of MCL-PHAs. (C) 2003 Elsevier Science Inc. All rights reserved.This work was supported by the National Research
Laboratory Program (2000-N-NL-01-C-237) of the Korean
Ministry of Science and Technology (MOST), Center for Ultramicrochemical Process Systems and by the BK21 project
from the Ministry of Education. We thank Dr. Isabelle-S.
Hinner (GBF, Germany) for kindly providing plasmid
pBBR1MCS. We also thank Dr. G.M. Church (Harvard
Medical School, USA) for the kind gift of plasmid pKO3
Peak Car and Beyond: The Fourth Era of Travel
No full textThere is emerging evidence that personal daily travel, particularly by car, has ceased to grow in the developed economies. This can be attributed to saturation of demand, given high levels of access and choice now widely available, together with constraints on higher speeds. We are therefore at a time of transition from an era of growth of per capita travel to an era of stability, in which the future factors determining the growth of total travel demand are demographic — population growth, increasing longevity, and urbanisation. The peak car phenomenon, which marks this transition, is seen in successful cities that attract a growing population whose travel needs are increasingly met by investment in rail-based transport, the revival of which is a characteristic of the new era
Author Co-Citation Analysis (ACA): a powerful tool for representing implicit knowledge of scholar knowledge workers
No full textIn the last decade, knowledge has emerged as one of the most important and valuable organizational assets. Gradually this importance caused to emergence of new discipline entitled ―knowledge management‖. However one of the major challenges of knowledge management is conversion implicit or tacit knowledge to explicit knowledge. Thus Making knowledge visible so that it can be better accessed, discussed, valued or generally managed is a long-standing objective in knowledge management. Accordingly in this paper author co- citation analysis (ACA) will be proposed as an efficient technique of knowledge visualization in academia (Scholar knowledge workers)
Pb-210 deposition in the far East Asia: controlling factors of its spatial and temporal variations.
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