Conservação de sementes de maracujá-amarelo (Passiflora edulis Sims f. flavicarpa Deg.): interferências do teor de água das sementes e da temperatura do ambiente.

Fonseca, Samara Camargo Lopes

doi:10.11606/t.11.2004.tde-27102004-155457

Cited by 4 publications

(4 citation statements)

References 7 publications

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“…The viability of the seeds and, consequently, their greater or lesser longevity depends on the interaction between several factors, among them the moisture content, which occupies a prominent place (Peske et al, 2012). Fonseca (2004) reports that for storage, the combination of 7% moisture content with a temperature of 10 °C favors the maintenance of the physiological potential of the seeds of Passiflora edulis Sims f. flavicarpa Deg.…”

Section: Introductionmentioning

confidence: 99%

Drying kinetics of passion fruit seeds

Santos¹,

Rodovalho

Silva

et al. 2018

Científica

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After the extraction, passion fruit seeds present moisture content around 30% w.b., making their storage unviable. Thus, drying becomes an important tool for the safe storage of these seeds. Based on the study of the drying process, it is possible to obtain information regarding the phenomenon of heat and mass transfer between the product and the drying element, atmospheric air, heated or not. The objective of this work was to evaluate the drying kinetics of passion fruit seeds exposed to three drying conditions: full sun, half shade and shade (laboratory), as well as to determine their thermodynamic properties. The temperature was measured by means of a chemical thermometer (wet and dry bulb). For the validation of the drying equations, analysis of nonlinear regression of the mathematical models of drying to the experimental data was performed, the parameters of the models being related to the drying air temperature. The values of the coefficient of determination (R 2), mean relative error (P), estimated mean error (SE), and chi-square (X 2) were used as criteria to verify the fitting degree of the mathematical models studied. The Wang and Singh model was the model that best fit the experimental data, with R 2 values closer to the magnitude, X 2 and SE closer to 0 and smaller P. The sun drying condition obtained a greater efficiency in the water removal of passion fruit seeds.

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Section: Introductionmentioning

confidence: 99%

Drying kinetics of passion fruit seeds

Santos¹,

Rodovalho

Silva

et al. 2018

Científica

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“…Esses resultados demonstram a possibilidade de conservação por mais de 12 meses em ambiente de câmara fria. Fonseca (2004) armazenou sementes de maracujá-amarelo a 10 o C durante 365 dias e obteve 99% de germinação. Nakagawa et al (1991) obtiveram para TABELA 1 -Teor de água (%) proveniente de sementes do maracujá-doce armazenadas em condições de ambiente não controlado, câmara fria e câmara seca.…”

Section: Methodsunclassified

“…A propagação do maracujazeiro no Brasil é, predominantemente, sexuada e, dessa maneira, o armazenamento das sementes participa do processo produtivo de suas espécies. A esse respeito, tem sido a espécie Passiflora edulis Sims f. flavicarpa Deg (maracujá-amarelo) mais pesquisada, havendo indicações de que a manutenção da germinação é favorecida em ambientes controlados (Geraldi Júnior, 1974;Thai, 1977;Almeida, 1985;Nakagawa et al, 1991;Fonseca, 2004) e voltados à conservação de sementes ortodoxas (Becwer et al,1983).…”

Section: Introductionunclassified

Avaliação da potencialidade fisiológica de sementes de maracujá-doce (Passiflora alata Dryander) submetidas ao armazenamento

Osipi

Nakagawa

2005

Rev. Bras. Frutic.

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Averiguou-se a influência de três condições ambientais na capacidade de armazenamento da semente do maracujá-doce (Passiflora alata Dryander): ambiente não controlado (embaladas em saco de papel), câmara seca (embaladas em saco de papel) e câmara fria (embaladas em saco de polietileno). Nesses tratamentos, avaliaram-se o teor de água e as porcentagens de germinação, de plântulas anormais, de sementes dormentes e a de mortas, no decorrer de seis meses e após um ano. A germinação não diferiu entre os ambientes de conservação durante os seis meses iniciais de armazenamento. Após doze meses, contudo, a conservação favoreceu as sementes com grau de umidade próximo a 10%, embaladas em sacos de polietileno e mantidas a 10 º C.

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“…4-Management and treatment: in Portugal, just on 2008 a governmental decree-law was published to rule over the C&DW streams, since it is still common to find abandoned C&DW without any treatment near roads or in private properties. The estimates also indicate that about 95% of the generated C&DW is disposed in landfills or collected by non-licensed companies [6]. 5-Recycled materials: in Portugal, the use of recycled aggregates as building materials has not been easy to implement, namely due to the difficulty in obtain large quantities, the variability in the produced recycled aggregates and the availability of natural aggregates at much lower prices.…”

Section: Introductionmentioning

confidence: 99%

Quality Improvement of Recycled Aggregates from a Construction and Demolition Waste Recycling Pilot Plant

Algarvio

Lima

Cunha

2012

MSF

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The construction and demolition wastes (C&DW) frequently are abandoned in private properties, roads, and landfills or collected by non-licensed companies. In Portugal they are few recycling plants operating with this residue, and this work makes the bridge between the mechanical recycling process developed on semi-industrial scale, and the recycling products characterization process developed on laboratorial scale. The main goal of the present work is the quality improvement of the recycled aggregates produced by a construction and demolition waste recycling pilot plant with 50 ton/h located in Montemor-o-Novo. Process operations are the hammer mill comminution, magnetic separation and sieving (bar sieves: 0-4mm, 4-8mm and 8-12mm; and square sieves: 12-22mm, 22-31mm and above 31mm). In order to improve the magnetic separation process, several tests with different distances between the magnet and the conveyor belt were made (21-31cm). On the other hand, to improve the quality of the produced aggregates, the bar screen size fractions were analyzed, according to the Portuguese Standard (NP EN 933-1 2000). The most efficient distances for the magnetic separation process were identified as between 21 and 27cm, with efficiency between 85% and 90% respectively. According to the histograms, the more frequent red aggregate from 0-4mm size fraction are +0.425-0.850; +0.850-1.7 and +1.7-3.35. From the 4-8mm red aggregates, the more frequent size fractions are +4.75-6.7 and +6.7-9.95. Finally, from the 8-12mm red aggregates, the more frequent new size fractions are +6.7-9.50 and +9.50-13.20. Sieving results obtained from cumulative curves for red aggregate showed an decrease in the mass % amount for the size fractions: 0-4mm: 97%, 4-8mm:76% and 8-12mm: 56%. The results from cumulative curves for grey aggregate showed a light decreased in the amount mass % for the size fractions: 0-4mm: 90%, 4-8mm:56% and 8-12mm: 60%.

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Conservação de sementes de maracujá-amarelo (Passiflora edulis Sims f. flavicarpa Deg.): interferências do teor de água das sementes e da temperatura do ambiente.

Cited by 4 publications

References 7 publications

Drying kinetics of passion fruit seeds

Drying kinetics of passion fruit seeds

Avaliação da potencialidade fisiológica de sementes de maracujá-doce (Passiflora alata Dryander) submetidas ao armazenamento

Quality Improvement of Recycled Aggregates from a Construction and Demolition Waste Recycling Pilot Plant

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