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Search Results: 1 - 10 of 240209 matches for " Francisco C.C.;Saraiva "
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Desafios atuais da modelagem preditiva de distribui??o de espécies
Giannini, Tereza C.;Siqueira, Marinez F.;Acosta, André L.;Barreto, Francisco C.C.;Saraiva, Antonio M.;Alves-dos-Santos, Isabel;
Rodriguésia , 2012, DOI: 10.1590/S2175-78602012000300017
Abstract: predictive modelling has been used to analyze species geographic distribution through extrapolation of environmental characteristics of known occurrence areas. interest in this kind of modelling is derived from the need for rapid and well-grounded answers to the threats faced by species due to habitat loss, exotic species invasion, climate changes, and others. this article provides an overall view of recent advances in modelling and aims to encourage the discussion and application of this method that can help with basic biological knowledge acquisition as well as with public policies aimed at their conservation.
Poda da haste principal e densidade de cultivo na produ o e qualidade de frutos em híbridos de mel o
Pereira Francisco Hevilásio F.,Nogueira Isení C.C.,Pedrosa Josué F.,Negreiros Maria Z.
Horticultura Brasileira , 2003,
Abstract: Avaliou-se os efeitos da poda da haste principal e da densidade de cultivo sobre a produ o e a qualidade de dois híbridos de mel o. Os trabalhos foram desenvolvidos na ESAM em Mossoró-RN, de 01/06 a 11/08/98. Foram desenvolvidos dois experimentos, sendo um com e o outro sem poda da haste principal. Em cada um estudaram-se os híbridos Orange Flesh e Hy Mark e as densidades de cultivo de 20.000, 30.000, 40.000 e 50.000 plantas ha-1, arranjados em esquema fatorial 2 x 4. O delineamento experimental utilizado foi blocos casualizados com quatro repeti es. Houve intera o significativa entre a poda da haste principal e os híbridos para massa média dos frutos, rela o de formato e sólidos solúveis totais e entre a poda da haste principal e a densidade de cultivo para o número de frutos totais e n o-comercializáveis. Os híbridos Orange Flesh e Hy Mark, quando submetidos à poda, foram mais produtivos apresentando, em média, 25,96 Mg ha-1 de frutos comercializáveis. A produtividade e a massa média dos frutos diminuíram com o aumento da densidade de cultivo. O número de frutos totais e comercializáveis aumentaram em fun o da densidade de cultivo. O híbrido Orange Flesh, submetido à poda, apresentou a maior rela o de formato, com índice de 1,09, enquanto o híbrido Hy Mark apresentou a menor, com índice de 1,04. O híbrido Hy Mark submetido à poda da haste principal apresentou o maior teor de sólidos solúveis totais (8,99%).
Os gêneros de Bethylidae (Hymenoptera: Chrysidoidea) de quatro áreas de Mata Atlantica do Espírito Santo
Mugrabi, Daniele F.;Alencar, Isabel D.C.C.;Barreto, Francisco C.C.;Azevedo, Celso O.;
Neotropical Entomology , 2008, DOI: 10.1590/S1519-566X2008000200007
Abstract: the generic richness and abundance of bethylidae collected in four different hillside areas of atlantic rain forest from espírito santo, brazil were studied. the sites are santa maria de jetibá (smj), domingos martins (dm), pancas (p) and atílio vivacqua (av). a total of 2,840 specimens of 12 genera were collected. lepidosternopsis ogloblin and bakeriella kieffer are first recorded from the state. richness of taxa was calculated using first-order jackknife richness with estimates program. genera accumulation curves were ran to evaluate the samples. abundance data were adjusted to the geometric distribution. parameter k was used to compare areas. the generic profile was not equal for the sites we studied. the areas were considered disturbed. smj and dm presented genera richness bigger than in p and av. the differences in the sites reflect the different preservation of each environment. pseudisobrachium kieffer and dissomphalus ashmead are most dominant genera in smj, dm and p, and anisepyris kieffer in av. this study emphasizes the fact of dissomphalus as the most abundant genus in rain forests. the generic profile found in av is similar to that of some areas of brazilian savannah.
Poda da haste principal e densidade de cultivo na produ??o e qualidade de frutos em híbridos de mel?o
Pereira, Francisco Hevilásio F.;Nogueira, Isení C.C.;Pedrosa, Josué F.;Negreiros, Maria Z.;Bezerra Neto, Francisco;
Horticultura Brasileira , 2003, DOI: 10.1590/S0102-05362003000200014
Abstract: two field trials were carried out to evaluate the effect of pruning and planting density on yield and fruit quality of two melon hybrids. the work was done in mossoró, brazil, in the period of 06/01 to 08/11/98. the hybrids orange flesh and hy mark were studied and the planting densities of 20,000; 30,000; 40,000 and 50,000 plants ha-1, in factorial outline 2 x 4. the experimental design was of randomized blocks, with four replications. there was significant interaction among pruning and hybrid for medium weight of fruits, format relationship and total soluble solids and between pruning and planting density for the total number of fruits and number of unmarketable fruits. the hybrid submitted to the pruning provided larger productivity, with the hybrid orange flesh and hy mark presenting 25.96 mag ha-1 on average. the yield and the medium weight of fruits decreased with the increase of the planting density. the total number of marketable fruits increased in function of the planting density. the hybrid orange flesh submitted to pruning presented the largest format relationship with index of 1.09, while the hybrid hy mark presented the smallest with index of 1.04. the hybrid hy mark submitted to pruning presented the largest level of total soluble solids (8,99%).
An Overview of Human Rights, Good Governance and Development
C.C Nwufo
African Research Review , 2010,
Abstract: The human rights issues have continue to generate both interest and controversy in the world. This is because more than before the organized world community has placed considerable emphasis on human rights violation especially in developing world. This study focuses on the issue of evolution of human rights, then goes on to address the problems of human rights violations and the impact on good governance. The paper also addresses the economic and social effect of such human rights violations on national development as well as the effect of using communication to solve the problem of human rights violations and corruption.
Thermal Vibration of Magnetostrictive Material in Laminated Plates by the GDQ Method
C.C. Hong
The Open Mechanics Journal , 2007, DOI: 10.2174/1874158400701010029]
Abstract: The study of magnetostrictive material in laminated plate under thermal vibration is calculated by using the generalized differential quadrature (GDQ) method. The YNS shear deformation effect is included in the time dependent of displacement field. In the thermoelastic stress-strain relations that containing the linear temperature rise and the magnetostrictive coupling terms with velocity feedback control. We use the GDQ method to normalize and discrete the dynamic differential equations in terms of displacements and shear rotations into the form of dynamic discretized equations. Four edges of rectangular laminate with simply supported boundary conditions are considered. The time responses of thermal stresses and center displacement with and without velocity control are obtained.
Prevalence of Trypanosomiasis in Ruminants in Parts of Abia State, Nigeria
C.C. Ohaeri
Journal of Animal and Veterinary Advances , 2012, DOI: 10.3923/javaa.2010.2422.2426
Abstract: In a study of the prevalence of trypanosomiasis in ruminants in five regions of Abia State, Nigeria surveys were carried out at Isiukwuato, Ikwuano, Ohafia, Isiala Ngwa and Umuahia South Local Government areas. About 1361 ruminants made up of 405 cattle, 81 goats and 67 sheep were sampled monthly from April 2003-March 2004. Blood samples were examined for trypanosomes using the Giemsa stained thick and thin smear method. The results showed that the overall prevalence of trypanosomiasis in the State was 1.9%. The prevalences in the different ruminant species were 3.7% in cattle, 1.2% in goats and 1.1% in sheep. Infection was lower (p<0.05) in animals resident in the State than those from semi-nomadic and slaughter houses. The overall difference in gender and age related infection were not obvious. Among the infected animals, 11 (42.3%) and 15 (57.7%) were due to T. congolense and T. vivax, respectively. T. vivax was the leading species encountered in cattle while T. congolense was more predominant in small ruminants. The result shows that the number of animals infected is significantly (p<0.001) dependent on time of the year, location sampled (χ2 = 18.47, df = 4, p<0.001) and animal species (χ2 = 7.89, df = 2, p<0.05). This study brings to light that ruminants in the study area have low trypanosome infections and also confirms earlier observations by other researchers that goats and sheep which are exposed to a similar tsetse challenge as cattle are significantly less infected with trypanosomes than the latter.
Histological Changes in Organs of Rats Infected with Trypanosoma congolense
C.C. Ohaeri
Research Journal of Animal Sciences , 2012, DOI: 10.3923/rjnasci.2010.50.52
Abstract: Five albino rats were infected with Trypanosoma congolense and killed on post infection day 28 by ether anaesthesia. Liver and kidney were removed weighed and histologically processed. All the inoculated rats developed trypanosomiasis which was characterized by a fluctuating parasitaemia and marked changes in organs. The histological changes observed in the liver were enlarged hepatocytes that contained numerous vacuoles and dissociated hepatic cords when compared with uninfected rats that revealed normal morphology. Kidney section of infected rats showed thickening of basement membrane as compared to uninfected rats. It also showed cell infiltration by macrophages and lymphocytes around glomeruli and blood vessels. The observation of cell infiltrations in the organs suggests that trypanosome infection is associated with histopathological changes that contribute to chronic debilitation.
'n Histories-opvoedkundige rekonstruksie van die geletterdheid van die Suid-Afrikaanse bevolking : 'n eerste kartering
C.C. Wolhuter
South African Journal of Education , 2002,
Abstract: Historico-educational reconstruction of the literacy of the South African population: a first mapping. The aim in this paper was to map the outlines of the history of the literacy of the South African population, from census material and from the few existing studies, as a basis for further research on the history of literacy in South Africa. The problem of defining and measuring literacy is discussed. Areas of main emphases in international history of education research on literacy are identified, and the research apparatus available for the reconstruction of the literacy history of South Africa is surveyed. This is followed by mapping the outlines of the history of the literacy of South Africa's population. In conclusion, and in the light of the foci in international history of education research on literacy, the following recommendations are made for further research on the theme, using the identified available research apparatus. There is a need for research that will complete the picture on progress in the history of literacy of the South African population; for investigations into the causes/determinants/correlates of literacy in South Africa and for research on the relationship between literacy in South Africa and industrialisation, economic growth, modernisation, cognitive development, and the development of political consciousness. Out of these studies, guidelines for combatting the illiteracy that still exists in South Africa could then be ed. (South African Journal of Education: 2002 22(2): 125-131)
Iets over de Javaanse woorden tekwan en tekon
C.C. Berg
Bijdragen tot de Taal-, Land- en Volkenkunde , 1974,
Abstract:
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