Os Novos Materiais Bibliográficos e a Gestão da Informação: livro eletrônico e biblioteca eletrônica na América Latina e Caribe

Rosetto, Marcia

doi:10.1590/s0100-19651997000100008

Cited by 4 publications

(9 citation statements)

References 6 publications

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“…One can see that the amplitude of the abnormal band in the CD spectrum of particles of the CLCD is only slightly changed at low concentrations of GdCl 3 (r total < 0.5).Under these conditions the noticeable alterations in the CD spectra of the linear DNA treated by gadolinium salts are observed [13][14][15][16][17][18]. The violation of regular character of the secondary structure of linear molecules nucleic acids which is accompanied by change in the shape of their CD spectra is specific not only for to their complex formation with several metals [14,15] but complexes with gadolinium [5 ]. One can see as well that a quite sharp change in the amplitude of the abnormal band in the CD spectrum of the CLCD of the DNA-Gd 3+ occurs when there is large excess of gadolinium cations in the solution (r total > 20) and its maximum is shifted by 10 nm toward long wavelengths.…”

Section: )mentioning

confidence: 95%

“…As it shown in [13][14][15][16], when rare-earth cations interact with linear ds nucleic acid molecules [DNAs or synthetic polyribonucleotide poly(I)-poly(C)], the CD spectra of these molecules change their shape. In particular, when the ionic strength of a solution is low, the CD spectrum characteristic of the linear right-handed B-form DNA with a r total of about 0.5 (r total is the ratio of the molar concentration of rareearth cations in the solution to the molar concentration of the DNA nitrogen bases) is similar to the CD spectrum of the left-handed Z -form DNA [14,17,18].…”

Section: The CD Spectra Of Particles Of Dna Clcd Treated By Rare-eartmentioning

confidence: 99%

“…When the ionic strength is high (approximately 0.3), this transition is still observed, but its manifestation in the CD spectrum is not so pronounced. Change in the shape of the CD spectrum indicates that the regular character of the secondary structure of linear DNAs is altered, which, according to [13][14][15][16], can be a consequence of the formation of complexes of rare-earth cations with pairs of the DNA nitrogen bases and/or with phosphate groups. The induced changes have local character, i.e.…”

Section: The CD Spectra Of Particles Of Dna Clcd Treated By Rare-eartmentioning

confidence: 99%

“…Such alterations are accompanied not only by a change in the shape of the CD spectrum, but also prevent the formation of the CLCD from somodified ds DNA molecules. This is a typical violation of the regular character of the nucleic acids secondary structure, induced by their complex formation with several metals [14,15].…”

Section: The CD Spectra Of Particles Of Dna Clcd Treated By Rare-eartmentioning

confidence: 99%

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A Transition in DNA Molecule's Spatial Ordering Due to Nano-Scale Structural Changes

Yevdokimov¹,

Salyanov²,

Штыкова³

et al. 2008

TONANOJ

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The optical, X-ray-and AFM-properties of the particles of cholesteric liquid-crystalline dispersion (CLCD) formed by double-stranded DNA molecules and treated with gadolinium salts are studied. It is shown that under certain conditions this treatment results in two effects: i)amplification of the abnormal negative band in the CD spectra specific to the initial CLCD, and ii) disappearance of small-angle X-ray scattering specific of ordered DNA molecules. The explanation of these effects is based on a suggestion that gadolinium ions when present at high concentrations not only induce nano-scale changes in the DNA secondary structure, but also overcompensate the DNA negative charges, influencing the efficiency of DNA-DNA interactions in the content of the particles of CLCD. These processes lead to transformation of the spatial structure in particles of CLCD. The resulting structure of particles of DNA CLCD highly enriched in gadolinium is not "liquid-crystalline"; rather it is a rigid construction of practical importance.

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Section: )mentioning

confidence: 95%

Section: The CD Spectra Of Particles Of Dna Clcd Treated By Rare-eartmentioning

confidence: 99%

Section: The CD Spectra Of Particles Of Dna Clcd Treated By Rare-eartmentioning

confidence: 99%

Section: The CD Spectra Of Particles Of Dna Clcd Treated By Rare-eartmentioning

confidence: 99%

See 2 more Smart Citations

A Transition in DNA Molecule's Spatial Ordering Due to Nano-Scale Structural Changes

Yevdokimov¹,

Salyanov²,

Штыкова³

et al. 2008

TONANOJ

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“…Com o movimento das novas tecnologias ainda em seu início, notadamente em relação à revistas e livros, Rosetto (1997) divulga sua pesquisa sobre o livro e a biblioteca eletrônicos na América Latina e Caribe, onde considera que "o grande salto quantitativo dos tipos de materiais informacionais deve-se à crescente importância, na sociedade moderna, do item informação, produto estratégico no desempenho, interação e sinergia no processo social e econômico, transformandose, nos anos 60, em um novo setor definido como o do conhecimento ou da informação".…”

Section: Agradecimentounclassified

Artigos científicos em medicina no Brasil: prospectiva de autorias em colaboração

Taruhn¹

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This thesis deals with the scientific communication process, with a focus on coauthoring and collaboration for publication of papers, or scientific articles, in journals. The authors are the permanent members of the Postgraduate Programs (PPGs) in Medicine, in Brazil, evaluated with the maximum score (seven) by the evaluation of the higher education system of CAPES, in the triennium 2007-09 , the penultimate date of the reported results. The PPGs were identified and their permanent members as well as the context of the performance of these collaborative networks by means of this information in the Programs and Proposals Sheets at CAPES evaluation site. With the aid of the software tool ScriptLattes, quantitative analysis was performed in co-authorship articles recorded in the Curriculum Lattes, of the National Council of Research of Brazil (CNPq), through graphs and analytical data obtained from studies of co-authorship networks in qualitative analysis. Also under this type of analysis was created and sent a questionnaire via the Web, through the software SurveyMonkey to 272 permanent members of the Programs and answered by 81 of them, with the advice of the Center for Applied Statistics of the Institute of Mathematics, University of São Paulo (ECA-IME-USP). In the questionnaires was verified ways to get information and demonstrated the prevalence of specialized databases, CAPES Portal Journals and references in articles read. For registration information for papers, the computer is the most used way being cited the automatic management of references by programs. So the email is the communication médium most used, but video conferencing and the Web space has already obtained some punctuation. Asked about the difficulty in communication or not to write papers in collaboration, the authors revealed that it flows easily, with some additional free comments. The choice of particular channels of communication and / or journals for publication occurs mainly due to the impact factor of the publication, as well as the area of specialization, reputation of the title and previous experience. To disseminate the articles published, the Curriculum Lattes, ResearchID, MyCitations and websites are preferred. Several authors also considered the costs to publish could be the responsibility of development agencies, the government, the department where they work and / or the authors themselves. Regarding open access, the perception is that "someone always has to pay the bill", it seemed not to be a great concern for copyright. In turn, the information management processes are adopted as contained in the Proposals for CAPES, where are described library systems structures, distance learning, to promote functionality visibility of their actions and results, as well as social integration and solidarity. Knowledge management is also a present factor according to the responses obtained in the Proposals and descriptions of PPGs. Among respondents, 77 % supported the real importance of the Web in the current process of Science Communication...

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Conteúdos digitais e acessibilidade de pessoas com deficiência visual

Campos¹,

Oliveira²

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This piece of writing describes, through a literature review, the state of the art in accessibility of digital contents by visually impaired people. This text also emphasizes the importance of access to information in the so called Information Society, as well as the role of communication and information technologies for the promotion of this access. This work stresses the importance of promoting visually impaired people´s access to information due to the fact that it is a basic citizenship right and a basic form of social participation. Therefore, it highlights the contribution of information and communication technologies that, through special procedures, have the possibility of promoting accessibility for all. The compliance with accessibility principles in the digital environment may aloud information and communication technologies to give a real contribution to the promotion of citizenship and social inclusion despite any limitations.

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Os Novos Materiais Bibliográficos e a Gestão da Informação: livro eletrônico e biblioteca eletrônica na América Latina e Caribe

Cited by 4 publications

References 6 publications

A Transition in DNA Molecule's Spatial Ordering Due to Nano-Scale Structural Changes

A Transition in DNA Molecule's Spatial Ordering Due to Nano-Scale Structural Changes

Artigos científicos em medicina no Brasil: prospectiva de autorias em colaboração

Conteúdos digitais e acessibilidade de pessoas com deficiência visual

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