Effect of post-ripening nitrogen atmosphere storage on banana shelf life, visual appearance and aroma

2002 ◽  
Vol 25 (1) ◽  
pp. 15-24 ◽  
Author(s):  
A Klieber ◽  
N Bagnato ◽  
R Barrett ◽  
M Sedgley
HortScience ◽  
2000 ◽  
Vol 35 (3) ◽  
pp. 484B-484
Author(s):  
G. Hong ◽  
M.I. Cantwell

Minimal processing of green onions (Allium cepa × A. fistulosum) involves trimming and removing damaged leaves, cutting of roots, and removal of the compressed stem. If the stem tissue is completely removed with the roots, the white inner leaf bases may extend, or “telescope,” during storage. Storage at 0 °C greatly retards extension growth, but storage at 5 °C results in unacceptable extension rates. To maintain high quality and to extend the shelf life of intact and minimally processed green onions, the potential benefits of heat treatments and controlled atmosphere storage were evaluated. Atmospheres of 0.1% to 0.2% O2 or 0.1% to 0.2% O2 containing 7.5% to 9.0% CO2 at 5 °C were the CA conditions that best maintained visual appearance and prolonged shelf life to more than 2 weeks in both intact and cut onions. No CA treatment completely controlled “telescoping” at 5 °C. Several heat treatment combinations (52.5 and 55 °C water for 4 and 2 min, respectively) of the white inner leaf bases were effective in controlling “telescoping” of cut green onions stored at 5 °C. The effective heat treatments resulted in higher average respiration rates during 12 days, but did not affect the visual quality or shelf life of the cut green onions. Total soluble sugars decreased in intact or cut green onions, but concentrations were maintained in heat -treated onions. Thiosulfinate concentrations did not vary importantly during 14 days at 5 °C, except for a reduction in heat-treated onions not stored under CA.


1994 ◽  
Vol 57 (12) ◽  
pp. 1088-1093 ◽  
Author(s):  
R. A. HOLLEY ◽  
P. DELAQUIS ◽  
N. RODRIGUE ◽  
G. DOYON ◽  
J. GAGNON ◽  
...  

Fresh pork loin slices were packaged under three different anoxic atmospheres (100% N2, 100% CO2 and 50% N2 + 50% CO2) and kept at two storage temperatures (−1°C and 4°C) and two pressures (1.0 and 1.2 atm.) in reusable, gas impermeable metal boxes. A gas headspace to meat weight ratio of >31 per kg was maintained. Carbon dioxide concentrations were unchanged (controlled) during storage. Microbiological, biochemical and physical measurements were made during the 3-week storage period. While atmospheric pressure did not have a significant impact on shelf-life, samples stored at −1°C were satisfactory at 21 days in both CO2 treatments. Samples under N2 did not fare so well, showing higher levels of psychrotrophic bacteria after 18 days at −1°C and 14 days at 4°C. Samples kept in N2 at 4°C were spoiled within 2 weeks. Bacterial growth was slowest under 100% CO2, but samples stored under 50%–50% N2–CO2 at 4°C were also observed to be in good microbiological condition at 21 days of storage. Use of CO2-containing atmospheres provided more than 7 extra days of shelf-life at 4°C over that attainable under 100% N2. Shelf-life at −1°C was improved by 3 to 4 days over that at 4°C. Except for the length of time in storage, treatments had only a minor effect on pH, color, water holding capacity and shear force. These physicochemical characteristics were not factors which limited shelf-life.


2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Jeong-Eun Hyun ◽  
Ji-Yeon Kim ◽  
Eun-Mi Kim ◽  
Jong-Chan Kim ◽  
Sun-Young Lee

This study was conducted to investigate the microbiological, physicochemical, and visual quality of dried persimmons (Diospyros kaki Thunb. cv. Cheongdo-Bansi) during storage at various temperatures in order to determine the shelf-life. Two commercial dried persimmon samples were evaluated for changes in weight, moisture content, color, texture (hardness and gumminess), and microbial populations during storage at different temperatures (−20, 5, 12, and 25°C) for 70 days. Overall, dried persimmon-2 showed lower levels of total mesophilic bacteria, Escherichia coli, coliforms, yeasts, and molds than dried persimmon-1. Among the physicochemical qualities, significant differences were observed in color parameters such as L∗, a∗, and b∗ of the dried persimmons. However, no significant differences in weight, moisture content, and texture were observed in dried persimmons during storage for 70 days. Thus, changes in visual appearance and color index such as chroma value and browning index can be used as indicators for determining the shelf-life of dried persimmons.


2021 ◽  
Vol 9 (1A) ◽  
Author(s):  
Valter Arthur ◽  
Andressa Maria Simas Albano

The irradiation of fresh post-harvest foods has as main interests: inhibit sprouting, increase shelf life, reduce or delay damage caused by insects and diseases. This work is a preliminary study on the use of gamma radiation in fresh peas grains (Pisum sativum L.) in order to evaluate its effects on the inhibition of sprout and its increase in shelf life. The peas were submitted to 4 treatments: 0 (control), 0.15, 0.30 and 0.45 kGy, in a 60 Co research irradiator, after irradiation stored at 8 °C, being evaluated at 1, 7, 14 and 21 days after irradiation, for the following analyzes: assessments of visual appearance, total soluble solids, titratable total acidity, ratio, fresh weight loss, coloring, texture, pH, water content and ash. By visual evaluation it was observed that the irradiation did not significantly change the shelf life of the grains. The visual appearance, coloring and pH had interference due to the natural process of grain maturation. The doses of gamma radiation did not influence the content of ash, water and texture during storage and that dose of 0.45 kGy was not sufficient to inhibit the sprouting of the peas. It is possible to conclude that, with this work, a recommendation that, for the later works, in which one wishes to define the shelf life or to inhibit sprouting pea, initiate the irradiation of its samples with values above 0.45 kGy. 


2013 ◽  
pp. 925-932
Author(s):  
G.B. Martínez-Hernández ◽  
A.C. Formica ◽  
N. Falagán ◽  
F. Artés ◽  
F. Artés-Hernández ◽  
...  

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