Cruz Neto R.O.C.,UESC |
de Souza Junior J.O.,Jr. |
Sodre G.A.,Cacao Research Center
Revista Brasileira de Fruticultura | Year: 2015
Levels of Zn in tropical soils profoundly influences growth and nutrition of tree crops. Research was undertaken to assess the effect of soil Zn on growth and nutrition of clonal cacao tree seedlings of PH 16. Three acidic Oxisol soils differing in texture were used with nine doses of Zn (0, 1, 2, 4, 8, 16, 32, 48, and 64 mg dm-3). Rooted clonal seedlings were grown in plastic pot with 11 dm-3 of the soils at varying Zn levels for 240 days. At harvest growth (dry matter mass of leaves, stems, shoots, roots, and total) and nutrient concentrations were determined. The clonal cacao seedlings showed differences for production of dry matter mass and foliar nutrient concentrations for P, K, Ca, Mg, Mn, Fe, Zn, and Cu. There was Zn toxicity in all soils. © 2015, Sociedade Brasileira de Fruticultura. All rights reserved.
Lima E.M.,State University of Santa Cruz |
Pereira N.E.,State University of Santa Cruz |
Barbosa A.M.M.,State University of Santa Cruz |
Crop Breeding and Applied Biotechnology | Year: 2013
The 32 cacao clones selected as being resistant following the witches' broom epidemic and for having distinct productivity were characterized according to their genetic diversity and were submitted to a new selection. These plants were assessed for eight years at the Oceania Farm (FO) in Itagibá, Bahia, Brazil. The 13 microsatellite primers generated an average of 11.7 amplicons per locus, and based on them it was demonstrated that the 32 clones distribute themselves in groups apart from the nine clones used as controls. The 32 materials displayed significant differences in relation to the characters assessed in the field. Two criteria were formed from the classification of the most productive and resistant plants, and then used to select plants within the clusters. The selected plants displayed potential for the cacao improvement program, that they have a high production and high resistance to witches' broom.
Zinc availability to maize in different soils with and without liming determined by Mehlich-1, Mehlich-3 and DTPA [Disponibilidade de zinco para milho pelos extratores Mehlich-1, Mehlich-3 e DTPA em solos de minas gerais, na presença e ausência de calagem]
Menezes A.A.,State University of Santa Cruz |
Dias L.E.,Federal University of Viçosa |
Neves J.C.L.,Federal University of Viçosa |
da Silva J.V.O.,UESC
Revista Brasileira de Ciencia do Solo | Year: 2010
In Brazil, plant-available Zn in the soil is determined by several chemical procedures, of which the most commonly used are Mehlich-1 and DTPA. The objective of this study was to evaluate Zn availability in soils of Minas Gerais State, under different Zn and lime rates, using the extractors Mehlich-1, Mehlich-3 and DTPA and maize as indicator plant. Seven soil samples were incubated with lime to reach pH 6.0. The samples were treated with Zn in the form of ZnSO4, in the absence or presence of lime, and with a basic Zn-free fertilization of macro and micronutrients. Fifteen days after fertilization, sub-samples were collected for Zn determination by the extractors. For Mehlich-1 the extract was obtained by two procedures: filtering soon after extraction (M-1f) and aliquot withdrawal from the supernatant after 16 h (M-1s). The remaining soil was filled into plastic pots for maize cultivation during 50 days. The extraction capacity diminished in the following order: M-1s > M-1f > M-3 > DTPA, in all soils, with or without liming. M-1s and M-3 did not differ in extraction capacity in limed soil, whereas M-1f and DTPA were sensitive to liming. The Zn concentration values obtained with all extractors were negative and significantly correlated with clay content and soil water field capacity, with or without liming. The extraction capacity of DTPA was better correlated with soil properties in the presence of lime, indicating that the response of this extractor is better in higher-pH soils. All extractors were correlated with plant Zn content, and can therefore be used in the evaluation of soil Zn availability.
Sao Jose A.R.,UESB DFZ |
do Prado N.B.,UESC |
Bomfim M.P.,Independente do Nordeste Fainor |
Reboucas T.N.H.,UESB DFZ |
e Mendes H.T.A.,UESB
Revista Brasileira de Fruticultura | Year: 2014
Mineral nutrition is related to the growth and reproduction physiology of Annonaceae. Each species of Annona genus has a genetic load that presents specific nutritional requirements for their metabolic functions. The absorption march of nutrients is fundamental for determining the appropriate development stage and doses of applying fertilizers and getting the maximum productive yield. There are few scientific studies about nutrition and fertilization in this family, in spite of requiring large amount of nutrients. This study has the purpose of presenting major mineral requirements in Annona genus, with emphasis on custard apple (A. squamosa) and soursop (A. muricata), related to vegetative and reproductive growth and fruit quality (sugar content, acidity, firmness and crack fruit, etc.). The mineral absorption march in soursop during growth of seedlings is in decreasing order: K>N>Ca>Mg>P and Fe>Zn>Mn>Cu. Significant amount of N, K, Ca, Mg and P are extracted by Annonaceae as compared to other fruits. The export of nutrients by sugar apple is superior to those exported by oranges, pineapple, avocado and many other fruits. In respect of the micronutrient is known that B and Zn are very important in tropical soil with pH below 6.5. Nevertheless, in soil with pH superior to 7.0 Fe and other micronutrients may be restrictive to Annona growth and reproduction. The increasing importance of fresh and processing markets requires scientific investigations in absorption march and nutrition for the various species of Annonaceae.
Development of membrane and freestanding film as of polyaniline: Synthesis, characterization and application [Desenvolvimento de membranas e filmes auto-suportados a partir de polianilina: síntese, caracterização e aplicaçã o]
Muller F.,Federal University of Rio Grande do Sul |
Ferreira C.A.,Federal University of Rio Grande do Sul |
Amado F.D.R.,UESC |
Rodrigues M.A.S.,Institute Ciencias Exatas e Tecnologica
Polimeros | Year: 2011
Conducting polymers are a new class of polymers that has received particular interest for the production of membranes and films. The polyaniline (PANI) is distinguished among conducting polymers for its high chemical stability, easy polymerization and low cost. The objective of this work is to develop a freestanding polyaniline film, using camphor-10-sulphonic acid (CSA) as a primary dopant and 4-chloro-3-methyl phenol (CMC) as a secondary dopant in the presence of solvent for mixture of the solution, as well as develop a membrane using a conventional polymer (high impact polystyrene-HIPS) and conducting polymer (Polyaniline-PANI) doped with CSA for use in electrodialysis. Were performed tests of electrodialysis to determine the transport of ions Ni +2. The membrane and film were characterized by electric conductivity SEM, FTIR and Raman spectroscopy and TGA. The results point to the possibility of application of the selective membrane for electrodialysis. The extraction of nickel for the synthesized membrane was similar to the commercial membrane. The freestanding film despite exhibiting good mechanical strength in solid state showed unsatisfactory when placed under water with the working solution to electrodialysis, due to its brittle state.
Determination of the estrous cycle in collared peccary Pecari tajacu: Colpocytological and clinical aspects [Determinação do ciclo estral em catetos pecari tajacu: Aspectos colpocitológicos e clínicos]
de Araujo Guimaraes D.A.,Federal University of Pará |
de Garcia S.C.G.,Federal University of Pará |
le Pendu Y.,UESC |
de Albuquerque N.I.,Embrapa Amazonia Oriental
Acta Amazonica | Year: 2011
The main objective of this work was to study the estrous cycle of collared peccary by vaginal cytology. Samples were collected in 10 adult females, three times a week, for six months. The estrous cycle period for this specie was 28.45 ± 5.45 days. We observed a significant difference (p<0.01) between the cell types in the same phase of the oestrous cycle. During the proestrus phase, the exfoliative cytology arrangement showed high frequency of intermediate and superficial cells. The estrus phase had elevated rates of superficial cells, when compared to the other types, and an absence of leukocytes. During this phase, the external genitalia were reddish, tumescent; and the cervical mucus was evident. In the metaestrus phase, we observed a decrease of superficial cells, as well as the highest indices of intermediate cells, an increase of leukocytes and the presence of metestrus and foam cells. In the diestrus phase, the intermediate cells increased and leukocytes decreased. In conclusion, the present study suggests that it is possible to differentiate the phase of estrous cycle by vaginal cytology.
Samana A.R.,UESC |
Krmpotic F.,National University of La Plata |
Paar N.,University of Zagreb |
Bertulani C.A.,Texas A&M University-Commerce
Journal of Physics: Conference Series | Year: 2011
We extend our formalism of weak interaction processes, obtaining new expressions for the transition rates, which greatly facilitate numerical calculations, of neutrino (ν) and antineutrino (ν)-nucleus reactions and the muon capture. We have done a thorough study of exclusive (ground state) properties of 12B and 12N within the Projected Quasiparticle Random Phase Approximation (PQRPA). Good agreement with experimental data is achieved in this way. The inclusive ν/ν-nucleus reactions 12C(ν, e-)12N and 12C(ν, e+)12B are calculated within both the PQRPA, and the Relativistic QRPA (RQRPA). It is found that the magnitudes of the resulting cross-sections: i) are close to the sum-rule limit at low energy, but significantly smaller than this limit at high energies both for ν and ν, ii) steadily increase when the size of the configuration space is augmented, and particulary for ν/ν energies > 200 MeV, and iii) converge for sufficiently large configuration spaces and final state angular momenta.
Fisheries agreements, governance and deliberative council of extractive reserve: The case of resex Cassurubá, Caravelas, Bahia Brazil [Acordos de pesca, governança e conselho deliberativo de reserva extrativista: Caso da resex de Cassurubá, Caravelas, Bahia, Brasil]
Nobre D.M.,State University of Santa Cruz |
Boletim do Instituto de Pesca | Year: 2013
This study aimed to analyze the operational process of the Deliberative Council of the Cassurubá Extractive Reserve (RESEX), its discussions and decisions regarding fisheries agreements, and the implications for local governance. The Cassurubá RESEX is a sustainable use conservation unit, established in 2009, located in southern Bahia. The Council is considered a democratic space for decision-making and conflict resolution and is utilized as an instrument of local governance. In this sense, there is the creation of rules of use of fisheries resources through fisheries agreements, drawn up by users. We applied qualitative research methods of record analysis, participation in Council meetings, and review of Good Governance Principles. This analysis made it possible to describe the forms of construction of Fisheries Agreements and the performance of the Council in relation to principles of good governance predominated by legitimacy and voice.
IEEE Latin America Transactions | Year: 2012
This is the second regular issue of the IEEE Latin America Transactions of the year 2012. The regular issues are in March, June, September and December of each year. © 2012 IEEE.
Dantas P.A.S.,UESC |
de Souza Junior J.O.,UESC |
Gomes F.P.,UESC |
Revista Brasileira de Fruticultura | Year: 2012
The replacement of the traditional method for evaluating the nitrogen (n) in the plant by the use of portable chlorophyll meter SPAD is promising because it is a portable device that provides a nondestructive, instant and low cost index.This study aimed to determine the ability of this device in estimating leaf n content of cocoa. The area covered by this study involves the wet and humid climate zones of the sub humid cocoa region of Bahia. Were selected ten farms, in each area, with crops in agroforestry system and that the area had renewed by grafting of basal shoot with clones tolerant to witches' broom. In each farm, four plants over the age of four years were selected in different topographic and soil conditions. It was collected eight healthy leaves per plant and in each, was made six SPAD readings of the index. Furthermore, were determined the N content, N content, leaf area (LA) and specific leaf mass (SLM). The SPAD index was significantly positively correlated with leaf N content (r = 0.74), with AF (r = 0.62) and negatively with the MFE (r =-0.57). There was no correlation between N content and SPAD index. There was no correlation between N content and SPAD index. The simple linear regression model to predict the N content from SPAD index, without distinction of environments was more appropriate.