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Search Results: 1 - 10 of 39862 matches for " Ricardo Luiz Lange Ness "
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Avalia o Qualitativa das águas Subterraneas para Irriga o na Regi o do Baixo Jaguaribe – Ceará
Andréia de Araújo Freitas Barroso,Ricardo Luiz Lange Ness,Raimundo Rodrigues Gomes Filho,Francisco Limeira da Silva
Revista Brasileira de Agricultura Irrigada , 2010, DOI: 10.7127/rbai.v4n300011
Abstract: O conhecimento da qualidade da água para irriga o em uma regi o na qual se pretende instalar mais de 50 mil ha irrigados será de grande importancia para a manuten o da sustentabilidade produtiva dos solos. Este trabalho teve como objetivo avaliar a qualidade das águas subterraneas para irriga o na regi o do Baixo Jaguaribe – Ceará. Coletaram-seamostras de águas subterraneas, provenientes de oito pontos de amostragem nos municípios de Aracati, Itai aba, Jaguaruana e Limoeiro do Norte. Foram realizadas coletas durante o período de abril a agosto de 2002 e analisadas no Laboratório de Solos, águas para Irriga o e Tecidos Vegetais do CENTEC Limoeiro do Norte, Ceará. Os parametros analisados foram: Cálcio (Ca2+), Magnésio (Mg2+), Sódio (Na+), Potássio (K+), Cloreto (Cl-), Carbonatos (CO-3), Bicarbonatos (HCO-3), Sulfato (SO4-2) e Condutividade elétrica (CEa). Utilizou-se o softwareQualigraf para realizar a classifica o das amostras pelo diagrama do Piper. Os resultados mostraram que 87,5% dos íons cátions foram predominados de águas sódicas e 47,5% dos anions se enquadraram em águas bicarbonatadas e cloretadas, porém de acordo com a classifica o geral predominaram as águas bicarbonatadas sódicas com 47,5%.
Interferência do excesso de água no solo e componentes de produ??o em beterraba
Costa, Raimundo Nonato T;Vasconcelos, José Paulino de;Silva, Luís Ant?nio da;Ness, Ricardo Luiz L;
Horticultura Brasileira , 2008, DOI: 10.1590/S0102-05362008000100014
Abstract: the experiment was conducted in a laboratory at the federal university of ceara, in fortaleza, ceara state, brazil, from july to september 2002. constant water table depth drainage tanks were used to study the relationship between the stress daily index (sdi) and sugarbeet yield (cultivar early wonder). the experimental design was completely randomized with five treatments in four replications using 48-useful plant plots. treatments consisted of 0; 120; 180; 240 and 300 cm as the total of excess water (sew30). the crop flooding susceptibility coefficient (sc) was calculated for the first, second and third development stage. plants were submitted to a four-day flooding period by raising the water depth up to 0.10 m, at each stage. the root mean diameter (dm) was evaluated as well as the length of the largest leaf (cmf) and the productivity (pt). only dm presented significant variation as a result of soil water excess, varying from 5.51 without stress to 4.71 when the stress was applied at the last stage. the values of sc obtained for the first, the second and the third development stages were 0.10, 0.16 and 0.28, respectively. the weighted value of sc (0.17) associated with the respective values of sew (0; 120; 180; 240 and 300 cm) allowed us to calculate values of stress daily index (sdi), for each treatment: 0; 20.4; 30.6; 40.8 and 51.0, respectively. only the treatment with highest stress level treatment (water table at 5 cm) presented statistical difference (p<0.05). dm varied from 5.51 to 4.00, while cmf was reduced from 43.35 to 26.10, and the productivity dropped from 40.4 to 15.8 t.ha-1. the estimate of sdi that produced the highest value of productivity (41.8 t ha-1) was 12.8 cm, based on quadratic regression (r2 = 0.87).
A preferência por subscri??es privadas de a??es no Brasil
Rêgo, Ricardo Bordeaux;Ness Jr., Walter Lee;
RAE eletr?nica , 2007, DOI: 10.1590/S1676-56482007000200005
Abstract: this article investigates the preference of non-financial brazilian firms for public issues or private placements of equity as a source of capital from 1995 to 2002. empirical evidence is presented by means of descriptive statistics, followed by the development of multiple discriminant analysis and logistic regression models. the results reveal greater propensity to use private issues for firms with lower returns on equity and profits, smaller issues, high control concentration, more debt, less liquid stocks; and for holding and state-owned companies.
Estimation of soybean genetic progress in the South of Brazil using multi-environmental yield trials
Lange, Cláudia Erna;Federizzi, Luiz Carlos;
Scientia Agricola , 2009, DOI: 10.1590/S0103-90162009000300005
Abstract: the success of a genetic breeding program in a certain period can be assessed by the genetic gain observed. genetic progress can be estimated from the multi environmental trials (met) data which are routinely carried out by annual species breeding programs for the assessment of new commercial cultivars. a data set of 20 years of met of advanced soybean lines derived from four breeding programs was used to estimate and to compare the genetic gains obtained for three soybean maturity groups (early, medium and late) in four cropping regions of the state of rio grande do sul. the estimated yield gains ranged from 0.0 to 71.5 kg ha-1 year-1 (3.49% per year), depending on the maturity group and region, which suggests that the genetic breeding effort does not have a similar effect among the maturity groups or benefit the regions equally. there was no evidence of genetic progress for the early maturity group in any of the four regions, whereas gains in regions i and iv were comparatively greater than those in regions ii and iii. the objectives of the soybean breeding program in the region should be redirected. since not all the experimental lines used to estimate genetic gains were commercially released, the reported genetics gains were achieved by the breeding programs rather than those achieved by the cropping systems.
As raízes e o futuro do "Homem Cordial" segundo Sérgio Buarque de Holanda
Souza, Ricardo Luiz de;
Caderno CRH , 2007, DOI: 10.1590/S0103-49792007000200011
Abstract: this paper makes an analysis of the method used by sérgio buarque de holanda and of his concept of cordial man, showing how both were built starting from the weberian typology and how the cordial man's concept based the author's political analysis. it analyzes the subject of the national identity in the author's perspective, and it marks the reformulation process that such issue suffered throughout his work.
Utilization of Durability Criterion to Develop Automotive Components
Ricardo,Luiz Carlos H.;
Ciência & Tecnologia dos Materiais , 2010,
Abstract: today the automotive companies must reduce the time to development of new products with improvement in performance, durability and low cost reductions where possible. to achieve this goal the carmakers need to improve the design criterion of car systems like body, chassis and suspension components. this paper will present a review of the techniques used in the automotive industry regarding durability before mentioned systems. the paper will present the procedures to obtain the spectrum loading to use in finite element analysis and the validation in laboratory and proving grounds.
A new species of the genus Crenilabium (Mollusca, Heterobranchia, Acteonidae) from Brazil
Simone, Luiz Ricardo L.;
Papéis Avulsos de Zoologia (S?o Paulo) , 2006, DOI: 10.1590/S0031-10492006000700001
Abstract: crenilabium birmani, a new species of acteonid is conchologically described from the southwestern and southern coast of brazil. the new species is the fist record of the genus for the south western atlantic and differ in details and proportions of the suture and aperture. two variants of the suture were detected, some specimens have simple suture, while others possess a deep, scaled suture. information about a possible specimen of crenilabium figured by abbott (1974) representing rictaxis punctocaelatus is here discussed, and its holotype if figured.
Comparative morphology among representatives of main taxa of Scaphopoda and basal protobranch Bivalvia (Mollusca)
Simone, Luiz Ricardo L.;
Papéis Avulsos de Zoologia (S?o Paulo) , 2009, DOI: 10.1590/S0031-10492009003200001
Abstract: this study deals with detailed morphology and anatomy of 4 species of scaphopoda and 5 species of protobranch bivalvia. both classes are traditionally grouped in the taxon diasoma, which has been questioned by different methodologies, such as molecular and developmental. this study is developed under a phylogenetic methodology with the main concern in performing it in an intelligible and testable methodology. the analyzed scaphopoda species came from the brazilian coast and belong to the family dentaliidae [(1) coccodentalium carduus; (2) paradentalium disparile] and gadiliidae; [(3) polyschides noronhensis, n. sp. from fernando de noronha archipelago; (4) gadila braziliensis]. these species represent the main branches of the class scaphopoda. from protobranch bivalves, representatives of the families solemyidae [(5) solemya occidentalis, from florida; s. notialis, n. sp. from s.e. brazil], nuculanidae [(6) propeleda carpentieri from florida], and nuculidae [(7) ennucula puelcha, from south brazil] are included. these species represent the main branches of the basal bivalvia. the descriptions on the anatomy of s. occidentalis and of p. carpentieri are published elsewhere. the remaining are included here, for which a complete taxonomical treatment is performed. beyond these species, representatives of other taxa are operationally included as part of the ingroup (indices are then shared with them), as a procedure to test the morphological monophyly of diasoma. these taxa are: two lamellibranch bivalves [(8) barbatia - arcidae; (9) serratina - tellinidae; both published elsewhere;, and propilidium (10) patellogastropoda, and (11) nautilus, basal cephalopoda, based on basal taxa. the effective outgroups are (12) neopilina (monoplacophora) and (13) hanleya (polyplacophora). the phylogenetic analysis based on morphology revealed that the taxon diasoma is supported by 14 synapomorphies, and is separated from cyrtosoma (gastropoda + cephalopoda). although they are not the m
Morphological study on Littorina Flava (King & Broderip) from Brazil (Caenogastropoda, Littorinidae)
Simone, Luiz Ricardo L.;
Revista Brasileira de Zoologia , 1998, DOI: 10.1590/S0101-81751998000400005
Abstract: a detailed morphological study of the littorinid littorina flava (king & broderip), from venezuelan and brazilian coasts, is given and commented. a considerable degree of shell characters variation was found, mainly in color and sculpture. the pallial cavity presents normal fashion of mesogastropods, without any detectable morphological modification for the long air-exposure. the digestive system present odontophore muscles very similar to those of the cerithioideans and hydrobioideans; the radula, however, is enormously long; the stomach lacks differentiate style sac. the penis is characteristic in lacking annex glands. the pallial oviduct has no jelly gland, and has a well developed bursa copulatrix and vaginal tube.
Anatomy and systematics of Anodontites Elongatus (Swainson) from Amazon and Parana Basins, Brazil (Mollusca, Bivalvia, Unionoida, Mycetopodidae)
Simone, Luiz Ricardo L;
Revista Brasileira de Zoologia , 1997, DOI: 10.1590/S0101-81751997000400011
Abstract: the anatomy of anodontiies elongatus (swainson, 1823), a rare species restricted to the amazon and parana basins, is described by first time, showing a group of conchological and anatomical characters exclusive of this species that may be analyzed to identify it. diagnosis of a. elongatus: shell long antero-posteriorly, umbones prominent, periostracum opaque and smooth, two posterior radial striae; middle fold of mantle edge veiy tall; gill long antero-posteriorly and short dorso-ventrally, extending about a half of it total length beyond visceral mass; palps proportionally small, several furrows in its outer surface; stomach without esophageal transversal ridjp, dorsal hood and gastric shield poorly developed, major typhlosole entering in ddd , posterior pouch of sa3 very-long; style sac reduced, without crystalline style; distal region of intestine and rectum with a well developed typhlosole, "t" in section, other intestinal regions without folds; gonad gonochoristic.
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