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Doses of controlled-release fertilizer for production of rubber tree rootstocks
Antonio Nilson Zamunér Filho,Nelson Venturin,Ailton Vitor Pereira,Elainy Botelho Carvalho Pereira
CERNE , 2012,
Abstract: This experimental study aimed to evaluate the effects of doses of controlled-release fertilizer (ALL) on the development of rubber tree rootstocks. The fertilizer used was Osmocote , scheduled to be released for 8-9 months and with the following composition: N (15%), P2O5 (9%), K2O (12%), Mg (1%), S (2.3%), B (0.02%), Cu (0.05%), Fe (1%), Mn (0.06%), Mo (0.02%) and Zn (0.05%). A randomized block design was used, with four treatments and eight replicates of 20 plants per plot. The controlled-release fertilizer was added to Rendimax Floreira substrate at doses of 0, 3, 6 and 9 g per liter, and rootstocks were produced in plastic containers with a capacity of two liters of substrate. Three seeds of clone GT 1 were scattered in each container and thinning was performed on day 60, leaving the most vigorous plant only. After the fourth leaf shot from each rootstock, the containers of each treatment were topped, due to compaction, with 300 mL of the relevant fertilizer and substrate mixture. The rootstocks were evaluated at eight months of age as to height, stem diameter (DC) 5 cm above root collar, total dry matter, shoot and root dry matter, leaf nutrient levels and percentage of plants suitable for grafting (DC≥1.0 cm). Results revealed that adequate development and nutrition of rootstocks was achieved by using 6 g of controlled-release fertilizer per liter of substrate.
Doses of controlled-release fertilizer for production of rubber tree rootstocks
Zamunér Filho, Antonio Nilson;Venturin, Nelson;Pereira, Ailton Vitor;Pereira, Elainy Botelho Carvalho;Macedo, Renato Luis Grisi;
CERNE , 2012, DOI: 10.1590/S0104-77602012000200008
Abstract: this experimental study aimed to evaluate the effects of doses of controlled-release fertilizer (all) on the development of rubber tree rootstocks. the fertilizer used was osmocote？, scheduled to be released for 8-9 months and with the following composition: n (15%), p2o5 (9%), k2o (12%), mg (1%), s (2.3%), b (0.02%), cu (0.05%), fe (1%), mn (0.06%), mo (0.02%) and zn (0.05%). a randomized block design was used, with four treatments and eight replicates of 20 plants per plot. the controlled-release fertilizer was added to rendimax floreira？ substrate at doses of 0, 3, 6 and 9 g per liter, and rootstocks were produced in plastic containers with a capacity of two liters of substrate. three seeds of clone gt 1 were scattered in each container and thinning was performed on day 60, leaving the most vigorous plant only. after the fourth leaf shot from each rootstock, the containers of each treatment were topped, due to compaction, with 300 ml of the relevant fertilizer and substrate mixture. the rootstocks were evaluated at eight months of age as to height, stem diameter (dc) 5 cm above root collar, total dry matter, shoot and root dry matter, leaf nutrient levels and percentage of plants suitable for grafting (dc>1.0 cm). results revealed that adequate development and nutrition of rootstocks was achieved by using 6 g of controlled-release fertilizer per liter of substrate.
ASSESSMENT OF SUBJECTIVE PERCEIVED EXERTION AT THE ANAEROBIC THRESHOLD WITH THE BORG CR-10 SCALE
Antonio R. Zamunér,Marlene A. Moreno,Taís M. Camargo,Juliana P. Graetz
Journal of Sports Science and Medicine , 2011,
Abstract: The purpose of this study was to evaluate the anaerobic threshold (AT) with a graphic visual method for estimating the intensity of ventilatory and metabolic exertion and to determine the ratings of perceived exertion (RPE) on the Borg CR-10 scale during a continuous ramp type exercise test (CT-R). Forty healthy, physically active and sedentary young women (age 23.1 ± 3.52 years) were divided into two groups according to their fitness level: active group (AG) and sedentary group (SG) and were submitted to a CT-R on a cycloergometer with 20 to 25 W/min increments. Shortly before the end of each one-minute period, the subjects were asked to rate dyspnea (RPE-D) and leg fatigue (RPE-L) on the Borg CR-10 scale. After the AT was determined with the graphic visual method, the score that the volunteers gave on the Borg CR10 scale was verified. Data were analyzed using the Mann-Whitney and Spearman correlation tests with the significance level set at 5%. The mean ratings of RPE-L and RPE-D at the AT level were not significantly different between groups (p > 0.05). Significant correlations were found between VO2, heart rate (HR), power output and RPE for both groups. The muscular and respiratory RPE, according to the Borg CR-10 scale, were correlated with the AT, suggesting that scores close to 5, which correspond to a "strong" perception, may be used as parameters for quantifying aerobic exercise intensity for active and sedentary individuals. The similar perception of exercise intensity, which corresponded to the AT of different individuals, makes it possible to prescribe exercise at an intensity equivalent to the AT by means of the RPE.
INTRASPECIFIC VARIATION IN NEUROTOXIC AND MYOTOXIC ACTIVITIES OF Bothrops neuwiedii VENOMS
BORJA-OLIVEIRA, C. R.;SOARES, A. M.;ZAMUNéR, S. R.;HYSLOP, S.;GIGLIO, J. R.;PRADO-FRANCESCHI, J.;RODRIGUES-SIMIONI, L.;
Journal of Venomous Animals and Toxins , 2002, DOI: 10.1590/S0104-79302002000100008
Abstract: snake venoms frequently vary in composition. in this work, we compared the neurotoxic and myotoxic activities of 16 lots of bothrops neuwiedii venoms from different regions of brazil, using chick biventer cervicis preparations. the neuromuscular blockade varied from 2% to 100% after 120 min incubation with venoms (50 mg/ml). in all cases, this blockade was irreversible and concentration-dependent; at low concentrations (10-20 mg/ml), 15 of the 16 venom lots failed to abolish responses to acetylcholine (110 mm), but blocked responses to kcl (13.4 mm), and induced contracture. at 5-20 mg/ml, the most active venom totally blocked twitch-tension without affecting responses to acetylcholine and kcl. polyacrylamide gel electrophoresis for basic proteins showed that the most active samples contained a band that was absent in the less active venoms. these results indicate that there may be considerable intraspecific variation in the neurotoxic activity of b. neuwiedii venoms, whereas myotoxic activity is less variable.
TESTICULAR BIOPSY IN RAMS (Ovis aries):EVALUATION OF SEMEN CHARACTERISTICS, ULTRASONOGRAPHIC AND GROSS EFFECTS, HISTOLOGICAL EXAMINATIONS, HORMONAL ASSAY AND STUDY WITH FIBRIN GLUE DERIVED FROM SNAKE VENOM
R. Sartori Filho
Journal of Venomous Animals and Toxins , 1998, DOI: 10.1590/s0104-79301998000100012
Abstract:
Increasing Ventilation by Passive Strategies: Analysis of Indoor Air Circulation Changes through the Utilization of Microclimate Elements  [PDF]
Patricia R. C. Drach, José Karam-Filho
Applied Mathematics (AM) , 2014, DOI: 10.4236/am.2014.53044
Abstract:

A demand for renewable alternatives that would be able to deal with the problems related to well-being is directly linked to the world’s growing needs to save energy and reduce environmental costs. For a project implementation addressing these issues, it is essential to know the climatic conditions of the target area. Taking natural ventilation, climatic factors, and renewable alternatives as important sources of comfort, in this work, passive strategies, through the utilization of microclimate elements as well as the location of outside obstacles, were imposed on an initial and specific project. The objective was to introduce obstacles which could interfere in the field of external wind and evaluate whether this outside intervention is able to make changes in indoor air circulation. The wind fields for the studied cases were obtained by computational simulations, and their consequences were analyzed to attain thermal comfort. The method adopted to obtain the wind fields was a Petrov-Galerkin type method, which is a stabilized mixed finite element method of the Navier-Stokes equations considering the incompressibility and formulated in primitive variables, velocity and pressure. The obtained results point to the solutions that promote the increase or decrease of the wind-field intensity.

Frustration-induced quantum phase transitions in a quasi-one-dimensional ferrimagnet: Hard-core boson map and the Ton ks-Girardeau limit
R. R. Montenegro Filho,M. D. Coutinho-Filho
Physics , 2008, DOI: 10.1103/PhysRevB.78.014418
Abstract: We provide evidence of a superfluid-insulator transition (SIT) of magnons in a quasi-one-dimensional quantum ferrimagnet with {\it isotropic} competing antiferromagnetic spin interactions. This SIT occurs between two distinct ferrimagnetic phases due to the frustration-induced closing of the gap to a magnon excitation. It thus causes a coherent superposition of singlet and triplet states at lattice unit cells and a power-law decay on the staggered spin correlation function along the transverse direction to the spontaneous magnetization. A hard-core boson map suggests that asymptotically close to the SIT the magnons attain the Tonks-Girardeau limit. The quantized nature of the condensed singlets is observed before a first-order transition to a singlet magnetic spiral phase accompanied by critical antiferromagnetic ordering. In the limit of strong frustration, the system undergoes a decoupling transition to an isolated gapped two-leg ladder and a critical single linear chain.
Doped AB_2 Hubbard Chain: Spiral, Nagaoka and RVB States, Phase Separation and Luttinger Liquid Behavior
R. R. Montenegro-Filho,M. D. Coutinho-Filho
Physics , 2008, DOI: 10.1103/PhysRevB.74.125117
Abstract: We present an extensive numerical study of the Hubbard model on the doped AB$_2$ chain, both in the weak coupling and the infinite-U limit. Due to the special unit cell topology, this system displays a rich variety of phases as function of hole doping ($\delta$) away from half-filling. Near half-filling, spiral states develop in the weak coupling regime, while Nagaoka itinerant ferromagnetism is observed in the infinite-U limit. For higher doping the system phase-separates before reaching a Mott insulating phase of short-range RVB states at $\delta=1/3$. Moreover, for $\delta>1/3$ we observe a crossover, which anticipates the Luttinger liquid behavior for $\delta > 2/3$.
Magnetic and nonmagnetic phases in doped AB2 t-J Hubbard chains
R. R. Montenegro-Filho,M. D. Coutinho-Filho
Physics , 2015, DOI: 10.1103/PhysRevB.90.115123
Abstract: We discuss the rich phase diagram of doped AB2 $t-J$ chains by using data from density matrix renormalization group and exact diagonalization techniques. The $J$ vs $\delta$ (hole doping) phase diagram exhibits regions of itinerant ferrimagnetism, incommensurate, resonating valence bond and Nagaoka states, phase separation, and Luttinger liquid (LL) physics. Several features are highlighted, such as the modulated ferrimagnetic structure, the occurrence of Nagaoka spin polarons in the underdoped regime and small values of $J=4t^2/U$, where $t$ is the first-neighbor hopping amplitude and $U$ is the on-site repulsive Coulomb interaction, incommensurate structures with nonzero magnetization, and strong-coupling LL physics in the high-doped regime. We also verify that relevant findings are in agreement with the corresponding findings in square and n-leg ladder lattices. In particular, we mention the instability of Nagaoka ferromagnetism against $J$ and $\delta$.
Quasi-One-Dimensional Quantum Ferrimagnets
R. R. Montenegro-Filho,M. D. Coutinho-Filho
Physics , 2005, DOI: 10.1016/j.physa.2005.05.060
Abstract: We present an exact diagonalization study of the half-filled Hubbard model on bipartite quasi-one-dimensional lattices. In particular, we emphasize the dependence of the ferrimagnetic ground state properties, and its associated magnetic excitations, on the Coulomb repulsion U.
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