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Search Results: 1 - 10 of 210377 matches for " Tatiane N.;El-Deir "
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Description of Atherinella brasiliensis (Quoy & Gaimard, 1825) (Atheriniformes: Atherinopsidae) larvae from the Jaguaribe River estuary, Itamaracá island, Northeastern Brazil
Fran?a, Elton J.;Severi, William;Castro, Maviael F.;Medeiros, Tatiane N.;El-Deir, Ana Carla A.;
Neotropical Ichthyology , 2007, DOI: 10.1590/S1679-62252007000300016
Abstract: the present study describes the external morphology and morphometry of the initial development of atherinella brasiliensis, and contributes toward broadening knowledge on its biology. a total of 88 larvae and 14 juveniles were used to characterize the morphological development and analyze body proportions. fish with standard lengths (sl) from 1.4 to 77 mm were used in the study. larvae hatch at an average of 1.4 mm sl. in the preflexion stage, the larval body is enveloped by a finfold, which begins behind the head. pectoral fins are the first to be formed and preflexion larvae have four characteristic dendritic chromatophores on the head. the flexion stage begins at an average of 4.4 mm sl; dorsal and anal fins already exhibit pterygiophores and a terminal, somewhat up-turned mouth. at 6.8 mm sl, the flexion stage ends. in the postflexion stage, larvae present greater ossification of the dorsal and anal fin rays, exhibit pelvic fin buds and a darkening of lateral pigmentation. at an average of 8.8 mm sl, head pigmentation intensifies and pelvic fins exhibit conspicuous ossifying rays. larvae at 11.8 mm sl have all fins formed; the second dorsal fin is the last to be formed at an insertion point posterior to the anal fin. the juvenile period begins at approximately 12 mm sl. at this stage, a. brasiliensis has an anal fin located at the median portion of the body and the posterior end of pectorals surpasses the origin of pelvic fins, which are located at the midpoint between the pectoral and anal fins. scales are present on the dorsal-lateral region behind the head. the morphological features of a. brasiliensis herein described allow an adequate identification of its larvae and differentiate them from hemiramphid and other atheriniform larvae, thus broadening knowledge on the larval biology of the species.
Natural Products from Ethnodirected Studies: Revisiting the Ethnobiology of the Zombie Poison
Ulysses Paulino Albuquerque,Joabe Gomes Melo,Maria Franco Medeiros,Irwin Rose Menezes,Geraldo Jorge Moura,Ana Carla Asfora El-Deir,R mulo Romeu Nóbrega Alves,Patrícia Muniz de Medeiros,Thiago Antonio de Sousa Araújo,Marcelo Alves Ramos,Rafael Ricardo Silva,Alyson Luiz Almeida,Cecília de Fátima Castelo Almeida
Evidence-Based Complementary and Alternative Medicine , 2012, DOI: 10.1155/2012/202508
Abstract: Wade Davis's study of Haitian “zombification” in the 1980s was a landmark in ethnobiological research. His research was an attempt to trace the origins of reports of “undead” Haitians, focusing on the preparation of the zombification poison. Starting with this influential ethnopharmacological research, this study examines advances in the pharmacology of natural products, focusing especially on those of animal-derived products. Ethnopharmacological, pharmacological, and chemical aspects are considered. We also update information on the animal species that reportedly constitute the zombie poison. Several components of the zombie powder are not unique to Haiti and are used as remedies in traditional medicine worldwide. This paper emphasizes the medicinal potential of products from zootherapy. These biological products are promising sources for the development of new drugs.
Ichthyofauna Used in Traditional Medicine in Brazil
Ana Carla Asfora El-Deir,Carolina Alves Collier,Miguel Santana de Almeida Neto,Karina Maria de Souza Silva,Iamara da Silva Policarpo,Thiago Antonio S. Araújo,R mulo Romeu Nóbrega Alves,Ulysses Paulino de Albuquerque,Geraldo Jorge Barbosa de Moura
Evidence-Based Complementary and Alternative Medicine , 2012, DOI: 10.1155/2012/474716
Abstract: Fish represent the group of vertebrates with the largest number of species and the largest geographic distribution; they are also used in different ways by modern civilizations. The goal of this study was to compile the current knowledge on the use of ichthyofauna in zootherapeutic practices in Brazil, including ecological and conservational commentary on the species recorded. We recorded a total of 85 species (44 fresh-water species and 41 salt-water species) used for medicinal purposes in Brazil. The three most commonly cited species were Hoplias malabaricus, Hippocampus reidi, and Electrophorus electricus. In terms of conservation status, 65% of species are in the “not evaluated” category, and 14% are in the “insufficient data” category. Three species are in the “vulnerable” category: Atlantoraja cyclophora, Balistes vetula, and Hippocampus erectus. Currently, we cannot avoid considering human pressure on the population dynamics of these species, which is an essential variable for the conservation of the species and the ecosystems in which they live and for the perpetuation of traditional medical practices.
Estrutura da assembléia de peixes de uma lagoa marginal desconectada do rio, no submédio Rio S?o Francisco, Pernambuco
Luz, Sandra Cristina Soares da;El-Deir, Ana Carla Asfora;Fran?a, Elton José de;Severi, William;
Biota Neotropica , 2009, DOI: 10.1590/S1676-06032009000300011
Abstract: samplings with various fishing devices were undertaken between march 2007 and february 2008, in the curralinho lake, a marginal pond located in the submedium s?o francisco river, aiming at evaluating the fish fauna composition after its isolation from the river channel and water depletion. a total of 4,638 specimens was collected, with a biomass of 129,782.84 g, distributed in 16 families and 47 species from the orders characiformes, cyprinodontiformes, siluriformes, perciformes, gymnotiformes and clupeiformes. characiformes were most abundant and 87.3% of the specimens were small (<100 mm) or medium-sized (<200 mm). among the species collected, 26.7% were constant, 35.6% accessory and 37.8% accidental. characidae encompasses most of the species and individuals, followed by acestrorhynchidae. moenkhausia costae, triportheus guentheri, pygocentrus piraya and prochilodus argenteus were present in all samples. invertivores and piscivores dominated quantitatively and their biomass indicate a predominance of predators, with detritivores presenting the second greatest biomass. resident species prevailed, with few individuals of migratory fish belonging to anostomidae and prochilodontidae families and salminus franciscanus. fish richness, diversity and equitability were relatively high throughout the period of study. it may be concluded that the curralinho lake is an important shelter, feeding and resting ground for the ichthyofauna, mainly for forage fish that serve as the basis of the trophic chain and fisheries′ sustainability. therefore, there is an urgent need of environmental policy and management practices development that would preserve habitat integrity and functionability of their role in the conservation of ichthyodiversity of this stretch of the s?o francisco basin.
Desenvolvimento ovariano de Plagioscion squamosissimus (Heckel, 1840) (Actinopterygii, Perciformes), no reservatório de Pedra, Rio de Contas, Bahia
Félix, Renata Triane da Silva;Severi, William;Santos, Athiê Jorge Guerra;El-Deir, Ana Carla Asfora;Soares, Maria Goretti;Evêncio Neto, Joaquim;
Biota Neotropica , 2009, DOI: 10.1590/S1676-06032009000300012
Abstract: this study aimed to characterize oocyte organization and maturation stages of plagioscion squamosissimus ovary. samples were collected bimonthly in pedra reservoir, contas river (ba), between november 2004 and september 2006. microscopic analyses were made on histological cuts stained with hematoxylin - eosin - phloxine and gomori trichromic mixture. five maturation stages were identified through macro and microscopic analysis. gonad coloration varied according to maturation stages. six phases of oocyte development were identified: oogonia and perinucleolar, vitellogenic and early lipidic, vitellogenic and intermediate lipidic, vitellogenic and advanced lipidic, and pre-ovulation. cell structures were similar to those found among marine species, such as oil droplets fusion at later developmental stages and pre-ovulatory hydration. such features may be explained by the marine origin of sciaenidae, thus suggesting the need of more detailed studies for understanding the origin, development and function of these structures along oocyte developmental stages.
A circula??o oceanica de larga-escala na regi?o oeste do Atlantico Sul com base no modelo de circula??o Global OCCAM
Cirano, Mauro;Mata, Mauricio M;Campos, Edmo J.D;Deiró, Núbia F.R;
Revista Brasileira de Geofísica , 2006, DOI: 10.1590/S0102-261X2006000200005
Abstract: the occam (ocean circulation and climate advanced modeling project) is one of the global ocean circulation models which has been commonly used by the brazilian oceanographic community. in most cases it is associated to regional numerical modeling studies, where it provides initial and boundary conditions for higher resolution models. the aim of this work, based on the concept of water masses, is to compare on an annual basis, the occam with the use of: i) climatological temperature and salinity data from the nodc (national oceanographic data center) and ii) volume transports associated with the water masses and based on values available in the literature. the selected levels of comparison were chosen to represent the core of the main water masses of the south atlantic and the associated currents, described based on their volume transports. the main results indicate that the model is capable of representing realistically the vertical structure of the main currents and the associated water masses for the study region. in the equatorial portion of the subtropical gyre the model shows, for example, the southward zonal migration of the south equatorial current bifurcation with the increase of depth. according to the model and for the tropical water level, the bifurcation occurs between 9os-15os, moving to 25os at the level of the south atlantic central water and between 25os-30os at the level of the antarctic intermediate water. the north atlantic deep water, which is part of the thermohaline circulation, is represented in the model with a net southward transport between 15 sv and 20 sv for the region of study and is in agreement with the literature values.
Sele??o de microhabitat por larvas de formiga-le?o Myrmeleon brasiliensis (Návas) (Neuroptera: Myrmeleontidae), em uma Reserva Florestal, Aquidauana, MS
Lima, Tatiane do N.;Faria, Rogério R.;
Neotropical Entomology , 2007, DOI: 10.1590/S1519-566X2007000500026
Abstract: the relative abundance, density, distribution pattern and relation among pit diameter and larvae body size of myrmeleon brasiliensis návas were evaluated in two microhabitats: sheltered and exposed. the total of 282 pits were found in sheltered microhabitat and only 50 in the exposed. the density of m. brasiliensis was between one and 43 individuals per m2. the distribution pattern of larvae tended from pooled to regular distribution as the density increased. in both microhabitats the larvae body size was positively correlated with pit diameter.
Adjusted likelihood inference in an elliptical multivariate errors-in-variables model
Tatiane F. N. Melo,Silvia L. P. Ferrari
Statistics , 2011,
Abstract: In this paper we obtain an adjusted version of the likelihood ratio test for errors-in-variables multivariate linear regression models. The error terms are allowed to follow a multivariate distribution in the class of the elliptical distributions, which has the multivariate normal distribution as a special case. We derive a modified likelihood ratio statistic that follows a chi-squared distribution with a high degree of accuracy. Our results generalize those in Melo and Ferrari(Advances in Statistical Analysis, 2010, 94, 75-87) by allowing the parameter of interest to be vector-valued in the multivariate errors-in-variables model. We report a simulation study which shows that the proposed test displays superior finite sample behavior relative to the standard likelihood ratio test.
My Limiting Behavior of MHD Flow with Hall Current, Due to a Porous Stretching Sheet  [PDF]
Faiza M. N. El-Fayez
Journal of Applied Mathematics and Physics (JAMP) , 2014, DOI: 10.4236/jamp.2014.25016
Abstract: An electrically conducting fluid is driven by a stretching sheet, in the presence of a magnetic field that is strong enough to produce significant Hall current. The sheet is porous, allowing mass transfer through suction or injection. The limiting behavior of the flow is studied, as the magnetic field strength grows indefinitely. The flow variables are properly scaled, and uniformly valid asymptotic expansions of the velocity components are obtained through parameter straining. The leading order approximations show sinusoidal behavior that is decaying exponentially, as we move away from the surface. The two-term expansions of the surface shear stress components, as well as the far field inflow speed, compare well with the corresponding finite difference solutions; even at moderate magnetic fields.
The Meaning Function Four Dimensional View: Procedural Approach  [PDF]
Hatem El-Ssayed, Aly N. Elwakeil
Open Journal of Modern Linguistics (OJML) , 2018, DOI: 10.4236/ojml.2018.82004
Abstract: This paper proposes a new procedural model for the meaning theory as a vector valued function. This function exhibits the consistency and isomorphism properties through the vector space. The new model explains the procedural mechanism of the lingual communication between the speaker and the audience in four-dimensional view. This approach can lead to several applications in different fields. The encoding of texts or speech by the useful properties of vector spaces and their linearity property will improve the digital translation quality. This consequently will improve the precession of the statistical and computational analysis of texts. Programming the statements of a text will be established easily. This in turn can be a subject matter of the decision-making in general and informatics. In addition, the model gives a clear distinction between the two terms “explanation” and “interpretation” of a specific text. Furthermore, the model feeds the perception of how the meaning appears in different dimensions based on the signification vectors which can be constructed according to the meaning state of a given text. This has been a big dilemma in the linguistic academic field long time ago.
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