RELATIONSHIP OF CHIPPING QUALITY OF POTATOES TO MATURITY AND STORAGE TEMPERATURE

1969 ◽  
Vol 49 (4) ◽  
pp. 453-458 ◽  
Author(s):  
Charles Walkof ◽  
B. B. Chubey

Acceptable chip quality based on chip color was obtained in five potato cultivars freshly harvested in August, September and October. Placing the tubers in 5 °C storage severely impaired chip quality. Reconditioning the tubers at 21 °C for 2 weeks improved chip quality in the cultivar Kennebec harvested in October and in two experimental cultivars, F5208 and F5889 harvested in September and October. Tubers of the cultivars Warba and Irish Cobbler from all harvests failed to become reconditioned satisfactorily. Preconditioning tubers at 21 °C before storing them at 5 °C and then reconditioning at 21 °C improved chip color in all cultivars. The color improved to an acceptable level in tubers of Kennebec harvested in October and of the experimental cultivars harvested in September and October. In these also, preconditioning produced good chip color when tubers were chipped directly from 5 °C storage. Tubers from all harvests of the experimental cultivar F5889, including those harvested when immature in August, chipped well from storage at 5 °C after 5 weeks of preconditioning at 21 °C.

2005 ◽  
Vol 11 (2) ◽  
pp. 99-105 ◽  
Author(s):  
M. G. Lobo ◽  
M. González ◽  
A. Peña ◽  
A. Marrero

The effects of ethylene exposure temperature, ethylene concentration and post-exposure storage temperature on the ripening processes of bananas were studied. Mature-green bananas were treated for 24h with different ethylene concentrations (5, 50, 500 and 5,000 L/L) at three temperatures (12, 15 and 20°C) and subsequently stored at either 15 or 20°C. No major differences were found among the four ethylene concentrations used, except in the case of the 12°C exposure temperature where the 5 L/L treatment showed little or no effect on ripening. In general, exposure to ethylene at 12°C in all cases resulted in uneven ripening of the fruits. Exposure to ethylene at 15°C (storage temperature 20°C) extended shelf life one or three days (storage temperature 15°C) more than ethylene exposure at 20°C. These differences were accompanied by changes in the respiration pattern of the bananas, their quality parameters (TSS, peel and pulp firmness) and their soluble sugars and organic acids composition. Shelf life of ethylene-treated bananas could reliably be modulated within the range of 6 to 12 days, without any decrease in fruit quality, just by adjusting exposure to ethylene and storage temperature.


2021 ◽  
pp. 10-19
Author(s):  
Asnawi Asnawi ◽  
Maskur Maskur ◽  
Adji Santoso Dradjat

The purpose of this study were to compare the quality of spermatozoa stored at 26⁰C, 5⁰C using diluents of NaCl, 10% glucose and 5% glucose. The spermatozoa of a rooster was collected and divided into 6 parts, each 2 tubes diluted in a ratio of 1:1 using NaCl, Glucose5% and Glucose 10%, then each 3 tubes with different diluents were stored at 26⁰C and 5⁰C. Observations of motility, viability and abnormalities of spermatozoa were carried out half an hour, 1 hour after dilution, followed every 2 hours until the ninth hours. The results showed that spermatozoa stored for 9 hours at a temperature of 26⁰C with a physiological diluent of NaCl, 10% Glucose and 5% Glucose each were different (P, < 0.05) with motility 50 ± 0.0%, 42 ± 10.95. % and 34±8.94%, respectively. At storage temperature of 5⁰C for 9 hours, physiological NaCl, 10% glucose and 5% glucose were significantly different (P<0.05) with motility 58.00±10.95%, 46.00±8.94% and 38.00±, respectively. 10.95% in a row. The viability of spermatozoa at 26⁰C storage with 5% glucose diluent was better than 10% glucose and physiological NaCl (P<0.05), 58.93±1.27%, 42.93±1.48% and 33.43±1.27% , while the physiological NaCl diluent and 10% glucose were not significantly different (P>0.05). At 5⁰C storage the viability of spermatozoa in the three diluents was not significantly different, with values of Glucose 10%, Glucose 5% and physiological NaCl 52.57±5.15%, 52.21±5.02% and 48.14±8.09%, respectively. Spermatozoa abnormalities at storage temperature 26⁰C and 5⁰C for 9 hours using physiological NaCl diluent, 5% glucose and 10% glucose, were not significantly different and varied between 5 to 10%. Finally, it can be concluded that at room temperature storage less than 4 hours the quality of spermatozoa was better with 5% glucose diluent, while for cold storage beyond 4 hours the quality of spermatozoa with NaCl diluent was higher


Author(s):  
Huynh Nguyen Duy Bao ◽  
Sigurjón Arason ◽  
Kristín Anna Þórarinsdóttir

The influence of different cooling techniques (dry ice/ice packs) and storage temperature (-2°C/3°C) to prolong the shelf life of Arctic charr (Salvelinus alpinus) fillets were evaluated by sensory analysis, physical methods, chemical and microbial analysis. The effects of storage temperature were stronger than of different cooling agents. Superchilling (-2°C) of fillets packed with dry ice resulted in 6 days extension of shelf life compared to chilling (3°C). The use of dry ice parallel to superchilling prolonged shelf life for 1 day compared to fillets stored with ice packs. No negative effects on quality of the fillets where detected that could be linked to cell destruction caused by partial freezing or to sour taste, caused by absorption of CO2 gas in fish flesh.


2021 ◽  
Vol 27 (3) ◽  
pp. 167-171
Author(s):  
Shareef Muhammed ◽  
Chitra Rajeswary ◽  
Anil Chandran

Eugenia roxburghii is an evergreen graceful shrub with a tremendous potential as garden plant. As a part of ex-situ conservation and popularization of the species, seed longevity was studied by understanding the relationship of seed viability with respect to different moisture contents and storage temperature. Seeds are recognized as recalcitrant, being desiccation as well as chilling sensitive. During hermetic storage, seeds stored at 300C/70%RH retained viability for about 5 months and 4 months in 200C/20% RH. Seeds can be best stored for five months in laboratory conditions.


2016 ◽  
Vol 23 (2) ◽  
pp. 73-78
Author(s):  
T. Sabu ◽  
P.S. Shameer ◽  
Chitra Rajeswary ◽  
N. Mohanan ◽  
C. Anilkumar

Seeds of Garcinia talbotii remained viable hardly for two weeks in open room conditions. As part of ex-situ conservation of Garcinia talbotii, seeds longevity was studied since seeds are the main propagule. For this, the relationship of seed viability with respect to different moisture content and storage temperature were analyzed. Seed storage behaviour is also investigated. Being recalcitrant, seeds are desiccation sensitive as well as chilling sensitive. During hermetic storage of seeds at 300C /70 % RH seeds retained viability about 6 months.


LWT ◽  
2020 ◽  
Vol 121 ◽  
pp. 108926 ◽  
Author(s):  
Supaporn Klaykruayat ◽  
Busarakorn Mahayothee ◽  
Pramote Khuwijitjaru ◽  
Marcus Nagle ◽  
Joachim Müller

1965 ◽  
Vol 42 (1) ◽  
pp. 7-14 ◽  
Author(s):  
C. O. Davis ◽  
Ora Smith

1948 ◽  
Vol 26f (3) ◽  
pp. 160-167
Author(s):  
D. MacDougall

Irish moss (Chondrus crispus) from Canada's east coast was used to study possible improvements in the production and storage of gelose. The optimum pH for the extraction of gelose from Irish moss was between 6 and 7. Fine leaf particles, which prevent rapid filtration, were readily removed by supercentrifuging. Comparison of drum drying and drying from the frozen state showed that the former caused a marked lowering of viscosity but had little effect on suspending power or jelly strength. The logarithm of the viscosity determined by means of a MacMichael viscosimeter was related directly to the concentration; therefore, viscosity measurements can be corrected for the moisture content of the samples. The effect of storage temperature on deterioration was greater than the effect of relative humidity. Samples stored at 0° and 40° F. for 12 weeks showed no significant changes in viscosity or suspending power, whereas those stored at 80° and 120° F. deteriorated very rapidly. Material was vacuum ice-dried to 2% moisture without damage but the quality decreased when the extracts were stored at high temperatures.


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