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Search Results: 1 - 10 of 176373 matches for " Luciano Paganucci de; "
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Pollen of Bauhinia L. and Phanera Lour. (Leguminosae-Caesalpinioideae) from the Brazilian Caatinga  [PDF]
Francisco de Assis Ribeiro dos Santos, Danovan de Matos Novaes, Luciano Paganucci de Queiroz
American Journal of Plant Sciences (AJPS) , 2012, DOI: 10.4236/ajps.2012.37108
Abstract: A study of pollen morphology, in species of the genera Bauhinia and Phanera (Leguminosae-Caesalpinioideae) which occur in the Brazilian caatinga, is presented. The pollen was examined using light and scanning electron microscopy. Samples were prepared by the KOH method; non-treated pollen grains were examined by scanning electron microscopy. Pollen grains in Bauhinia species (11) are colpate, but porate in B. cheilantha and B. subclavata. All four species of Phanera present colporate pollen grains; P. outimouta is the only to have syncolporate pollen grains. Species of both genera present heteromorphism in the number of apertures. Excepting P. outimouta whose pollen grains are psilate, all species in the two genera present supratectal processes (gemmae/clavae), however the exine in the two genera are dif- ferent–semitectate, reticulate in Bauhinia species, and tectate, rugulate (or psilate) in Phanera ones. Pollen characters support the segregation of Phanera from Bauhinia.
Uma nova espécie de Passiflora L. (Passifloraceae) para o Brasil
Nunes, Teonildes Sacramento;Queiroz, Luciano Paganucci de;
Acta Botanica Brasilica , 2007, DOI: 10.1590/S0102-33062007000200022
Abstract: a new brazilian species of passifloraceae is described and illustrated: p. mucugeana t.s. nunes & l.p. queiroz. this species is from the chapada diamantina region, state of bahia, near the towns of mucugê, ibicoara and barra da estiva, growing in semideciduous forests and "campo rupestre", at 1200 m altitude. the new species is classified in subg. passiflora supersect. stipulata feuillet & macdougal sect. granadillastrum triana & planch., because it appears to be a close relative of p. imbeana sacco.
Morphological cladistic analysis of Pseudobombax Dugand (Malvaceae, Bombacoideae) and allied genera
Carvalho-Sobrinho, Jefferson Guedes de;Queiroz, Luciano Paganucci de;
Brazilian Journal of Botany , 2011, DOI: 10.1590/S0100-84042011000200007
Abstract: (morphological cladistic analysis of pseudobombax dugand (malvaceae, bombacoideae) and allied genera). pseudobombax dugand belongs to the family malvaceae subfamily bombacoideae and aggregates 29 species restricted to the neotropics. a morphological cladistic analysis of pseudobombax and allied genera was carried out to test the monophyly of the genus and to provide hypotheses on its phylogeny. parsimony analyses were based on 40 morphological characters and 28 species, 14 belonging to pseudobombax and 14 to other species of bombacoideae, matisieae (malvoideae) and ochromeae. nine most parsimonious trees (144 steps, ci 0.40, ri 0.67) were produced when 10 multistate characters were taken as ordered while only two most parsimonious trees (139 steps, ci 0.41, ri 0.67) were obtained when all characters were considered as unordered. pseudobombax monophyly had moderate bootstrap support, appearing as sister to a clade composed of the genera bombacopsis pittier and pachira aubl., or to the genus bombax l. according to the analysis. the petiole widened at the apex and the leaflets not jointed to the petiole are probably synapomorphies of pseudobombax. three main clades were found in the genus: one characterised by petiolulated leaflets and 5-angular fruits, the other by pubescent leaves and calyx, and the other by reduction of the number of leaflets. the latter includes species endemic to the brazilian semi-arid region also characterised by the absence of phalanges in the androecium. interspecific affinities in pseudobombax as well as the morphological evolution in bombacoideae are discussed.
Morfologia dos tricomas das pétalas de espécies de Pseudobombax Dugand (Malvaceae, Bombacoideae) e seu significado taxon?mico
Carvalho-Sobrinho, Jefferson Guedes de;Santos, Francisco de Assis Ribeiro dos;Queiroz, Luciano Paganucci de;
Acta Botanica Brasilica , 2009, DOI: 10.1590/S0102-33062009000400003
Abstract: trichome morphology of the petals of pseudobombax dugand species was investigated. the eight species selected of pseudobombax were analyzed using optical microscopy and scanning electron microscopy. the study detected the existence of variation, both qualitative and quantitative, in morphology of trichomes in petals of species analyzed. in pseudobombax petals, two kinds of trichomes were found: (a) trichomes 2-4-armed, sessile, long, flexible and with thin walls, situated on the adaxial surface; (b) tufted trichomes, sessile, short, rigid, with thick, lignified walls, on the abaxial surface of the petals. the qualitative and quantitative data were of taxonomic value for the resolution of problems of specific identification in the genus.
Diversidade arbórea das florestas alto montanas no Sul da Chapada Diamantina, Bahia, Brasil
Nascimento, Francisco Haroldo Feitosa do;Giulietti, Ana Maria;Queiroz, Luciano Paganucci de;
Acta Botanica Brasilica , 2010, DOI: 10.1590/S0102-33062010000300011
Abstract: the southernmost region of chapada diamantina, nearest to rio de contas harbours the highest peaks of the brazilian northeastern region, including pico do barbado (2,033 m.a.s.l.) and the source of the two important rivers in bahia state (rio de contas and rio paramirim). the region is well known botanically. this was the first quantitative study to survey the floristic composition of 12 fragments of montane forests (1,350 m.a.s.l. to 1750 m.a.s.l.) including trees > 8 cbh. a total of 117 species, 84 genera and 48 families were found. the richest families were myrtaceae (n=20) and lauraceae (n=10). the richest genera were ocotea (n=7), myrcia (n=5), eugenia (n=4) and miconia (n=4). most species had wide geographic distributions, but some are found only in montane forests of southeastern and southern brazil such as drimys brasiliensis miers (winteraceae) and weinmannia paulliniifolia pohl (cunnoniacae). the fragments studied have low similarity with seasonally dry tropical forests that surround chapada diamantina, emphasizing the uniqueness of these forests and the need for protection.
RUBIO, Claudete Paganucci
Nucleus , 2003,
Abstract: Data was collected through statements made by professionals in the area, analysis ofdocuments on art-education and one target pre-primary and elementary school. The outcome of data analysismade it possible to indicate various proposals for democratic education. It also proved that re-structuting therelation space-time/ knowledge what poses greatest challenge, since this relation is what determines the qualityof the pedagogical work developedEste trabalho focaliza uma proposta pedagógica baseada nos pressupostos da arte-educa o.Pretende apontar possibilidades para a constru o de propostas educativas democráticas a partir de uma vis ohistórica, interdisciplinar e transdisciplinar
Evaluating Enterprise Risk in a Complex Environment  [PDF]
Ivan De Noni, Luigi Orsi, Luciano Pilotti
Journal of Service Science and Management (JSSM) , 2010, DOI: 10.4236/jssm.2010.33041
Abstract: This paper examines the relationship between operational risk management and knowledge learning process, with an emphasis on establishing the importance of statistical and mathematical approach on organizational capability to forecast, mitigate and control uncertain and vulnerable situations. Knowledge accumulation reduces critical situations unpredictability and improves organizational capability to face uncertain and potentially harmful events. We retain mathematical and statistical knowledge is organizational key factor in risk measuring and management process. Statistical creativity contributes to make quicker the innovation process of organization improves exploration capacity to forecast critical events and increases problem solving capacity, adaptation ability and learning process of organization. We show some important features of statistical approach. First, it makes clear strategic importance of risk culture within every level of organization; quantitative analysis support the emergence of latent troubles and make evident vulnerability of organization. Second, innovative tools allow to improve risk management and organizational capability to measure total risk exposition and to define a more adequate forecasting and corrective strategy. Finally, it’s not so easy to distinguish between measurable risk and unmeasurable uncertainty, it depends on quantity and quality of available knowledge. Difficulty predictable extreme events can bring out crisis and vulnerable situations. Every innovative approach which increases knowledge accumulation and improves forecasting process should be considered.
Technological Perspectives for Propulsion on Nuclear Attack Submarines  [PDF]
Luciano Ondir Freire, Delvonei Alves de Andrade
World Journal of Nuclear Science and Technology (WJNST) , 2016, DOI: 10.4236/wjnst.2016.64028
Abstract: This work aimed at proposing a new combination of technologies to improve military performances and reduce costs of nuclear attack submarines, without overlooking safety constraints. The last generation of nuclear attack submarines increased size to meet safety and operational requirements, imposing huge burden on costs side, reducing fleet size. The limitations of current Technologies employed were qualitatively discussed, explaining their limitations. There are new technologies (plate and shell heat exchangers) and architectural choices, like passive safety, and segregation of safety and normal systems, which may lead to reduction of costs and size of submarines. A qualitative analysis was provided on this combination of technologies, stressing their commercial nature and maturity, which reduced risks. The qualitative analysis showed the strong and weak points of this proposal, which adopted the concept of strength in numbers. Concluding, new Technologies enabled the existence of 3800 t nuclear attack submarines with powerful propulsion systems and good acoustic discretion.
The Role of Nuclear Power from a System Engineering Standpoint  [PDF]
Luciano Ondir Freire, Delvonei Alves de Andrade
World Journal of Nuclear Science and Technology (WJNST) , 2017, DOI: 10.4236/wjnst.2017.73015
Abstract: This work proposed the application of system engineering methods to identify organizations vital for society, seeking development and well-being. System engineering requires the identification of blocks (or systems), identification of their service functions, identification of states, identification of required quality and identification of constraints. Analyzing modern societies, vital functions were identified and countries behavior was modeled, identifying their states. In this context, nuclear power was found to be fundamental for development and defense because of its inherent advantages for military naval purposes at war. Another striking conclusion is that nuclear power is the best solution for country energy security, more than to avoid climate changes, but to help the nation to resist climate changes. A solution to mitigate the high overnight costs of nuclear power was also proposed. It was demonstrated qualitatively that the adoption of dual purpose mobile nuclear power plants military performances, economic development and risks management.
Constructal Law of Institutions within Social Organizations  [PDF]
Luciano Ondir Freire, Delvonei Alves de Andrade
Open Journal of Applied Sciences (OJAppS) , 2018, DOI: 10.4236/ojapps.2018.83009
Abstract: This work looked for a unifying theory between physical-biological domain and social sciences. Constructal law unified physical and biological domain by telling the general sense in which flow systems tend to evolve. Management theory looks for relations between institutions and human agency. Although being state of mind entities, institutions follow constructal law. This work proposed the main organization flows are information and credit. Biologic instincts derived from Darwinian natural selection are the driving or blocking forces of such flows. Once biologic instincts systematically block information and credit flows in large numbers, this work proposed every human organization must have institutions to inhibit some behaviors. Those institutions need to be present, at least partially, in formal rules of social groups. This way it is possible to predict expansion or downfall of human groups using objective and quantifiable data. Therefore, further studies may employ classical history to confirm this theory. This work analyzed some case studies to show qualitatively the application of proposed theory. Concluding, this work gave physically-biologically grounded guidance for institutional changes.
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