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Dos Santos P.K.,Federal University of Uberlandia | Fernandes K.C.,Federal University of Uberlandia | De Faria L.A.,Federal University of Uberlandia | De Freitas A.C.,Instituto Federal Of Educacao Ciencia E Tecnologia Do Triangulo Mineiro | Da Silva L.M.,Federal University of Vales do Jequitinhonha and Mucuri
Quimica Nova | Year: 2011

The discoloration and degradation of the textile dye RED GRLX-220 using the electrochemically generated ozone was investigated. Total discoloration was rapidly achieved in both acid and basic conditions. A pseudo-first order kinetics was observed for discoloration, influenced by pH and ozonation time. A considerable degree of mineralization (60%) was obtained after 30 min of ozonation in alkaline medium. The feasibility of organic matter oxidation during the ozonation process increased in both acidic and alkaline media. The toxicity decreased after the ozonation process, suggesting that the byproducts are less toxic than the parental compound.

Charlo H.C.O.,Instituto Federal Of Educacao Ciencia E Tecnologia Do Triangulo Mineiro
Acta Horticulturae | Year: 2012

Endive (Cichorium intybus) is one of the vegetables least studied in Brazil with respect to the behavior of the most commercialized cultivars, but it is known that the number of plants per area is one of the factors that most influences the productivity of various crops. Thus, the objective of this work was to evaluate the behavior of endive using four spacings between rows and five spacings between plants, in the region of Jaboticabal-SP. The experiment was conducted in the field in the period of August 12, 2008 to November 6, 2008, in the experimental area of the Sector of Vegetable Crops and Aromatic-Medicinal Plants, Department of Crop Sciences, School of Agricultural and Veterinary Sciences - UNESP-FCAV. The experimental design utilized was a randomized block design with a 4 × 5 factorial scheme, i.e., four spacings between rows (0.15, 0.20, 0.25 and 0.30 m) and five spacings between plants (0.10, 0.15, 0.20, 0.25 and 0.30 m), with three repetitions. The endive cultivar studied was 'Pão-de-Acucar', obtained from the company Tecnoseed. Seedlings were established utilizing the sowing system in 200-cell Styrofoam trays containing the substrate Plantmax Vegetables® HA. The seedlings were transplanted at 37 days after planting. After harvesting, the following characteristics were determined: height (cm), diameter of the plant in rows (cm), diameter of the plant in between rows (cm), number of leaves, fresh weight (g) and total estimated productivity (t/ha). There were no interactions between the factors studied. Based on the data, we conclude that spacings of 0.15 m between rows and of 0.15 m between plants produce plants of higher quality and with greater productivity.

Charlo H.C.O.,Instituto Federal Of Educacao Ciencia E Tecnologia Do Triangulo Mineiro
Acta Horticulturae | Year: 2012

The planting of lettuce in greenhouses, as well as covering beds with a polyethylene sheet, is a viable technology, promoting improvements in microclimatic conditions of the environment. In view of the little information on mini-lettuce, the aim of this work was to evaluate the performance of three cultivars of crisp minilettuce ('Green Frizzly', 'Red Frizzly no. 1' and 'Red Frizzly no. 2') with and without ground cover, under different spacings (20 × 15 cm and 20 × 20 cm), in three planting times (1: November 16, 2004; 2: December 17, 2004; and 3: January 20, 2005). The study was conducted in a greenhouse at UNESP-FCAV, Jaboticabal-SP. The experiments were carried out using a randomized block design, following a 3 × 2 × 2 factorial scheme with 12 treatments and three repetitions. The characteristics evaluated were plant height (cm), head diameter (cm), fresh weight (g) and number of leaves per plant. Planting time 3 was shown to be favorable for all the characteristics analyzed. 'Red Frizzly no. 2' was found to be the most suited to planting time 1, and for planting times 2 and 3, this cultivar did not differ from 'Red Frizzly no. 1'. The factor ground cover was not found to affect the characteristics evaluated, and therefore, cultivation without ground cover is recommended. The spacing 20 × 15 cm was shown to be favorable, resulting in cultivation with the highest populations, thereby increasing productivity. Based on the results obtained and for the conditions in which the experiment was conducted, it can be concluded that: planting time 3 (January 20, 2005) was the most favorable; the cultivars 'Red Frizzly no. 2' and 'Red Frizzly no. 1' are adapted to all the planting times; and cultivation without ground cover using a spacing of 20 × 15 cm was the most suitable.

Leitao R.A.,Instituto Federal Of Educacao Ciencia E Tecnologia Do Triangulo Mineiro | Leandro N.S.M.,Federal University of Goais | Stringhini J.H.,Federal University of Goais | Cafe M.B.,Federal University of Goais | Andrade M.A.,Federal University of Goais
Acta Scientiarum - Animal Sciences | Year: 2010

This work aimed to evaluate the supplementation of different carbohydrates and form of inoculation in low-weight eggs. Hatchery parameters, biometry of intestinal tract, intestinal morphometry and performance of broiler chicks were evaluated. The experimental design used was randomized blocks with five treatments and 120 replications for hatching eggs and four treatments and ten replications for the others parameters. The treatments were designed as follows: whole egg; inoculation on allantoidal cavity through air cell; inoculation on allantoidal cavity with solution of maltose, or glucose or sucrose. The data were analyzed using ANOVA, Tukey test and chi-square test. The results showed that the inoculation through air cell caused increase of embryo mortality and decrease of hatchability. Chicks from eggs inoculated with carbohydrates were born heavier than those not inoculated, but this extra weight was not maintained on the first day. The supplementation of carbohydrates in ovo did not increase the intestinal development and did not affect the initial performance of broiler chicks.

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