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Search Results: 1 - 10 of 47103 matches for " Ciro Antonio;Rodrigues "
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Gibberellin and cytokinin effects on soybean growth
Leite, Vagner Maximino;Rosolem, Ciro Antonio;Rodrigues, Jo?o Domingos;
Scientia Agricola , 2003, DOI: 10.1590/S0103-90162003000300019
Abstract: soybean is an important crop in brazil. nonetheless, there are no reports on the use of plant growth regulator potential in relation to this crop in the national literature. to better understand the role of these compounds, a pot experiment was carried out to study effects of ga3 and cytokinin on the vegetative growth of the soybean. ga3 (50 mg l-1) was applied as seed treatment, leaving plants with water application as control. ga3 (100 mg l-1) and cytokinin (30 mg l-1) were sprayed on leaves at the physiological stage v3/v4, and 15 days after, cytokinin (30 mg l-1), also as foliar spray. seed treatment decreased plant emergence and initial soybean root growth, but as the season progressed, differences in root growth disappeared; plants were shorter, and presented a decrease in the number of nodes, in stem diameter, in leaf area and in dry matter yield. conversely, foliar application of ga3 led to an increase in plant height, first node height and stem diameter. leaf area and dry matter production also increased as a result of ga3 foliar application. there was no effect of exogenous gibberellin and cytokinin on the number of soybean leaves, number of stem branches and root dry matter. joint application of gibberellin and cytokinin tended to inhibit gibberellin effects. cytokinin applied to leaves during soybean vegetative growth was not effective in modifying any of the evaluated plant growth variables.
Gibberellin and cytokinin effects on soybean growth
Leite Vagner Maximino,Rosolem Ciro Antonio,Rodrigues Jo?o Domingos
Scientia Agricola , 2003,
Abstract: Soybean is an important crop in Brazil. Nonetheless, there are no reports on the use of plant growth regulator potential in relation to this crop in the national literature. To better understand the role of these compounds, a pot experiment was carried out to study effects of GA3 and cytokinin on the vegetative growth of the soybean. GA3 (50 mg L-1) was applied as seed treatment, leaving plants with water application as control. GA3 (100 mg L-1) and cytokinin (30 mg L-1) were sprayed on leaves at the physiological stage V3/V4, and 15 days after, cytokinin (30 mg L-1), also as foliar spray. Seed treatment decreased plant emergence and initial soybean root growth, but as the season progressed, differences in root growth disappeared; plants were shorter, and presented a decrease in the number of nodes, in stem diameter, in leaf area and in dry matter yield. Conversely, foliar application of GA3 led to an increase in plant height, first node height and stem diameter. Leaf area and dry matter production also increased as a result of GA3 foliar application. There was no effect of exogenous gibberellin and cytokinin on the number of soybean leaves, number of stem branches and root dry matter. Joint application of gibberellin and cytokinin tended to inhibit gibberellin effects. Cytokinin applied to leaves during soybean vegetative growth was not effective in modifying any of the evaluated plant growth variables.
Exchangeable basic cations and nitrogen distribution in soil as affected by crop residues and nitrogen
Rosolem, Ciro Antonio;
Brazilian Archives of Biology and Technology , 2011, DOI: 10.1590/S1516-89132011000300003
Abstract: in this work, a greenhouse experiment was conducted to study the effects of n fertilization and residues of pearl millet, black oats and oilseed radish on ph and ca, mg, k, no3-, and nh4+ distribution within the profile of a distroferric red latosol. the equivalent of 8 t ha-1 of plant residues were placed on soil surface. lime was applied on the soil surface and nitrogen was applied over the straw at 0, 50, 100, and 150 mg kg-1, as ammonium nitrate. corn was grown for 57 days. calcium contents and ph in the soil profile were decreased by pearl millet residue, while black oat and oilseed radish increased ca contents and these effects are not related with ca contents in residue tissue. however, the presence of plant residues increased nitrate, ammonium, and potassium contents in the deeper layers of the pots.
Comunica o e a o política no contínuo mediático. Luhmann contra Habermas. e nós contra todos Communication and political action in the mediatic continuum. Luhmann versus Haber, and we versus everyone else
Ciro Juvenal Rodrigues Marcondes Filho
Galáxia , 2008,
Abstract: A política para Jürgen Habermas se faz com a forma o de consciências e com o investimento na linguagem, no falar cotidiano, na rela o intersubjetiva. Já para Niklas Luhmann, a política se faz por si mesma, e a opini o pública n o tem rela o com a opini o pessoal. N o adianta investir na linguagem, porque ela é pré-social, está além dos sujeitos, nenhuma democratiza o pode sair daí. Mas as propostas dos dois pensadores mostram-se insuficientes para a atualidade, com suas altas tecnologias comunicacionais, pois nenhum dos modelos dá uma resposta animadora para a quest o das redes, nenhuma delas visualiza um espa o mediático próprio fazendo a media o dos sistemas, nenhuma delas dá elementos para a constru o de uma teoria da comunica o tecnologicamente avan ada. Communication and political action in the mediatic continuum. Luhmann versus Haber, and we versus everyone else — Politics for Jürgen Habermas is set up starting from the formation of consciousness, from the investment in the language, in daily conversation, in inter-subjective relationship. For Niklas Luhmann on the other side it sets up by itself, public opinion has nothing to do with personal opinion. It has no sense to invest in language, for it is pre-social, it is placed beyond the subjects, no democratization comes from it. But no one of both thinkers with their answers is sufficient for the present time of high technological communications. No one of the two models gives an animating answer to the question of the net, no one sees an own media space that could do a mediation between systems, no one gives the conditions to the construction of a technological advanced communication theory.
Semiring and semimodule issues in MV-algebras
Antonio Di Nola,Ciro Russo
Mathematics , 2010, DOI: 10.1080/00927872.2011.610074
Abstract: In this paper we propose a semiring-theoretic approach to MV-algebras based on the connection between such algebras and idempotent semirings - such an approach naturally imposing the introduction and study of a suitable corresponding class of semimodules, called MV-semimodules. We present several results addressed toward a semiring theory for MV-algebras. In particular we show a representation of MV-algebras as a subsemiring of the endomorphism semiring of a semilattice, the construction of the Grothendieck group of a semiring and its functorial nature, and the effect of Mundici categorical equivalence between MV-algebras and lattice-ordered Abelian groups with a distinguished strong order unit upon the relationship between MV-semimodules and semimodules over idempotent semifields.
The semiring-theoretic approach to MV-algebras: a survey
Antonio Di Nola,Ciro Russo
Mathematics , 2011, DOI: 10.1016/j.fss.2015.08.026
Abstract: In this paper we review some of the main achievements of the semiring-theoretic approach to MV-algebras initiated and pursued mainly by the present authors and their collaborators. The survey focuses mainly on the connections between MV-algebras and other theories that such a semiringbased approach enabled, and on an application of such a framework to Digital Image Processing. We also give some suggestions for further developments by stating several open problems and possible research lines.
Efeitos do treinamento resistido sobre a for?a muscular e a autopercep??o de saúde em idosas
Queiroz, Ciro Oliveira;Munaro, Hector Luiz Rodrigues;
Revista Brasileira de Geriatria e Gerontologia , 2012, DOI: 10.1590/S1809-98232012000300015
Abstract: introduction: the strength training has been efficient in elderly women, however its relationship with the self-perception of health is not yet clear in the literature. objective: this study aimed to examine the effects of a training program with weights on muscle strength and the self-perception of health in elderly women in the city of jequié-ba. methodology: the sample was composed of 17 elderly women with a mean age of 68.76±5.95 years. the muscle strength was evaluated by the estimating test of maximum repetition (1mr). the training was performed in two weekly sessions, composed of two sets of 10 mr for each exercise, with intensity ranging from 50% to 70% of 1mr and duration of eight weeks. data were analyzed by descriptive statistics, paired student t-test and chi-square non-parametric test with a significance level of p <0.05. results: the muscle strength increased significantly (p <0.05), there was also an increase in the proportion of elderly women people who reported positive self-perception of health, however there was no statistically significant difference after the training. conclusion: it was concluded that the strength training method promoted significant answers on the increase in muscle strength and positive changes on self-perception of health in elderly women.
Prevalence of overweight and obesity in elderly attended in projects of UESB
Ciro Oliveira Queiroz,Hector Luiz Rodrigues Munaro
Revista Saúde.Com , 2008,
Abstract: Objective: To investigate the degree of overweight and obesity in o elderly attended the projects in UESB, Jequié-BA. Methodology: The sample was composed of 25 elderly people, with an average age of 68.96 (DP = 6) who are all female. For the analysis of body composition was used Index of Corporal Mass (IMC), the Waist-Hip Relationship (RCQ) and the measurement of three skin folds (Triciptal, suprailiac and abdominal). For statistical analysis it is used the statistical package SPSS 11.5. Results: The IMC classified 60% of the sample with overweight and obesity, the RCQ already classified 56% in the range of risk, and the percentage of skin folds at the junction of moderate, high and morbid were an average of 68%. Conclusion: There has been a prevalence of overweight and obesity and also showed high similarity with other national studies, it is recommended practice of physical activity and a healthy diet of conservation to control and prevent the body fat high.
Cotton root and shoot growth as affected by application of mepiquat chloride to cotton seeds
Almeida, Adriana Queiroz de;Rosolem, Ciro Antonio;
Acta Scientiarum. Agronomy , 2012, DOI: 10.4025/actasciagron.v34i1.12369
Abstract: the effects of mepiquat chloride (mc) application to cotton seeds on the initial growth of the plant roots and shoots were studied in a greenhouse experiment. glass-front containers with 27 l of soil were used in the experiment. cotton seeds of the cultivar fm 993 were sprayed with mc at five different doses of active ingredient (a.i.): 0, 3, 6, 9 and 12 g kg-1 seed. the shoot and root dry matter, leaf area, shoot:root ratio, leaf area: root growth ratio, and shoot length were evaluated 21 days after sowing. the root growth was evaluated every three days up to 18 days. the application of mc to cotton seeds decreased the shoot length but had no significant effect on the dry matter production, root length, shoot:root ratio or leaf area: root length ratio. thus, the application of mc to cotton seeds is not expected to have a deleterious effect on plant water acquisition.
Teores de nutrientes na folha e nos gr?os de aveia-preta em fun??o da aduba??o com fósforo e potássio
Nakagawa, Jo?o;Rosolem, Ciro Antonio;
Bragantia , 2005, DOI: 10.1590/S0006-87052005000300014
Abstract: black oat is a rustic gramineae, with low requirements, mainly cultivated as winter forage and green manure in crop rotation systems. in spite of its importance, there are only few studies evaluating the effects of fertilization on nutrient content in their leaves and grains. the objective of this work was to study the effects of p and k fertilization on the concentration of macro and micronutrients in flag leaf and grains of black oat cv. comum. an experiment was carried out under field conditions on a rhodic nitisol, in botucatu, s?o paulo state, brazil. three doses of p (0, 40 and 80 kg ha-1 of p2o5) and three doses of k (0, 20 and 40 kg ha-1 of k2o), in presence of 50 kg ha-1 of n (20 kg ha-1 applied at sowing and 30 kg ha-1 after tillering stage) were tested, in a factorial 3 x 3 randomized complete block design, with four replications. macro and micronutrients concentration in flag leaves increased with phosphorus fertilization; 40 kg.ha-1 of p2o5 was sufficient to promote these positive results. potassium fertilization affected only the concentration of k in the leaves. nutrient concentration in grains were not affected by phosphorus or potassium fertilization.
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