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- 검색키워드
- 저자 : Leonardo Ferreira Lopes (검색결과 2 건)
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Jaqueline Barbosa Dutra,Luiz Eduardo Bassay Blum,Leonardo Ferreira Lopes,André Freire Cruz,Carlos Hidemi Uesugi 한국원예학회 2018 Horticulture, Environment, and Biotechnology Vol.59 No.6
This research aimed to evaluate the eff ectiveness of hot water (43–53 °C · 5 min −1 ; 47 °C · 2–6 min −1 ), 1-methylcyclopropene(1-MCP) at 50–300 nL L −1 and a combination of hot water (47/49 °C · 5 min −1 ) and phosphite (40% P 2 O 5 + 20% K 2 O; 40%P 2 O 5 + 10% Zn) in anthracnose control and the eff ect on fruit quality [fresh weight loss (FWL—%); pH, total soluble solids(TSS—°Brix), and titratable acidity (TA = % citric acid (CA)] of passion fruit ( Passifl ora edulis f. fl avicarpa ) at the postharveststage. When the fruits were in the stage of 0% dehydration and fully yellow peels, they were disinfested and inoculatedwith Colletotrichum gloeosporioides . They were then subjected to the above mentioned treatments; this was followedby incubation for 120 h. The diameter of the disease lesions was monitored daily. After the incubation, a physico-chemicalanalysis was performed. Hot-water treatment resulted in disease reduction at 47 and 49 °C for 4 and 5 min. The combinationof hot-water treatment at 47 °C (4 or 5 min) and application of the phosphite of K or Zn signifi cantly reduced diseaseseverity in fruits. The 1-MCP treatment reduced anthracnose severity in passion fruit mainly at 200 nL L −1 · 24 h −1 . None ofthe treatments signifi cantly changed the physico-chemical characteristics of the fruit [FWL (2.6–4.1%); pH (3.2–3.5), TSS(8.9–10.9 °Brix), and TA (1.8–2.5% CA)].
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Heliene Leite Ribeiro Porto,Antonio Carlos Leal de Castro,James Werllen de Jesus Azevedo,Leonardo Silva Soares,Cássia Fernanda Chagas Ferreira,Marcelo Henrique Lopes Silva,Helen Roberta Silva Ferreira 한국화학공학회 2017 Korean Journal of Chemical Engineering Vol.34 No.7
Concentrations of calcium, iron, potassium, magnesium, phosphorus, zinc, copper, selenium and nickel were determined in the muscle tissue of seven species of fish (Plagioscion squamosissimus, Geophagus surinamensis, Prochilodus lacustres, Curimata sp., Schizodon dissimilis, Ageneiosus ucayalensis and Hypostomus plecostomus) collected from the lower course of the Itapecuru River in the state of Maranhão, Brazil. The samples were digested in a nitricperchloric solution and analyzed using an inductively coupled plasma atomic emission spectrometer, with the construction of specific calibration curves for each element. The highest concentrations of constituent minerals were found for phosphorus, potassium, nickel and magnesium (399.83, 144.60, 90.20 and 29.49mg 100 g−1, respectively) in G. surinamensi, P. lacustres and Curimata sp. The lowest concentrations were found for copper, zinc, iron and selenium (0.12, 0.51, 1.05 and 8.31mg 100 g−1, respectively) in Curimata sp., S. dissimilis, A. ucayalensis and P. squamosissimus. The concentrations of all minerals can be considered low and are below the maximum limit established by Brazilian legislation for the human ingestion of fish meat. A comparison of the seven species of fish investigated revealed no statistically significant differences regarding the concentrations of minerals, suggesting that size and different dietary habits do not exert an influence on absorption. The low concentrations of metals, such as Fe, Cu, Zn and Ni, may be related to the environmental conditions of the mouth of the river, which receives ocean inputs that produce particular tide cycles with a strong dispersion capacity, thereby diminishing residence time in the water column and reducing the availability of these metals to species of fish.
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