Influence of Different Drying Methods and Cold Storage Treatments on the Postharvest Quality and Nutritional Properties of P. ostreatus Mushroom

Dates are subjected to postharvest losses in quality and quantity caused by water loss, fermentation, insect infestation, and microbial spoilage during storage. Cold storage is the main element in the postharvest quality management used for fruit preservation. Although cold storage is used for dates, precision control of the relative humidity (RH) using ultrasonic applications is not used thus far, or it is applied to other fruits on a small scale. Therefore, we designed and constructed an ultrasonic humidifier (DUH) for RH control in the cold storage room (CSR) of dates. The optimum air velocity of 3 m s−1 at the outlets of the DUH ducts produced a mist amount of 6.8 kg h-1 with an average droplet diameter of 4.26 ± 1.43 µm at the applied voltage of 48 V and frequency of 2600 kHz of the transducers. The experimental validation was carried out by comparing a CSR controlled with the DUH with two conventional CSRs. The three tested CSRs were similar in dimensions, cooling system, and amount of stored dates. The time required for cooling 800 kg of dates in the controlled CSR from 25 °C to the target temperature of 5 °C was approximately 48 h. The DUH precisely controlled the RH at the maximum RH set point of 80% in the tested CSR at 5 °C. The controlled RH at 80% has a positive impact on the physicochemical characteristics of the stored dates. It significantly reduced the weight loss of the fruits and preserved fruit mass, moisture content, water activity, firmness, and color parameters. However, no significant effect was observed on fruit dimensions, sphericity, and aspect ratio. The microbial loads of mesophilic aerobic bacteria, molds, and yeasts fell within the acceptable limits in all tested CSRs. Both stored date fruits and artificially infested dates showed no signs of insect activity in the controlled CSR at the temperature of 5 °C and RH of 80%. The DUH proved to be a promising technology for postharvest quality management for dates during cold storage.

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Drying Characteristics and Physical and Nutritional Properties of Shrimp Meat as Affected by Different Traditional Drying Techniques

International Journal of Food Science ◽

10.1155/2016/7879097 ◽

2016 ◽

Vol 2016 ◽

pp. 1-5 ◽

Cited By ~ 29

Author(s):

P. T. Akonor ◽

H. Ofori ◽

N. T. Dziedzoave ◽

N. K. Kortei

Keyword(s):

Ash Content ◽

Moisture Loss ◽

Drying Methods ◽

Moisture Removal ◽

Solar Drying ◽

Nutritional Properties ◽

Drying Characteristics ◽

Red Color ◽

Drying Techniques

The influence of different drying methods on physical and nutritional properties of shrimp meat was investigated in this study. Peeled shrimps were dried separately using an air-oven dryer and a tunnel solar dryer. The drying profile of shrimp meat was determined in the two drying systems by monitoring moisture loss over the drying period. Changes in color, proximate composition, and rehydration capacity were assessed. The rate of moisture removal during solar drying was faster than the air-oven drying. The development of red color during drying was comparable among the two methods, but solar-dried shrimps appeared darker (L⁎=47.4) than the air-oven-dried (L⁎=49.0). Chemical analysis indicated that protein and fat made up nearly 20% and 2% (wb) of the shrimp meat, respectively. Protein and ash content of shrimp meat dried under the two dryer types were comparable but fat was significantly (p<0.05) higher in oven-dried meat (2.1%), compared to solar-dried meat (1.5%). Although rehydration behavior of shrimp from the two drying systems followed a similar pattern, solar-dried shrimp absorbed moisture more rapidly. The results have demonstrated that different approaches to drying may affect the physical and nutritional quality of shrimp meat differently.

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Estimation of Postharvest Quality of “Red Delicious” Apple Fruits Based on Fruit Nutrient Elements Composition

Journal of Agricultural Science ◽

10.5539/jas.v9n1p164 ◽

2016 ◽

Vol 9 (1) ◽

pp. 164

Author(s):

Mahshid Doryanizadeh ◽

Mahmood Ghasemnezhad ◽

Atefeh Sabouri

Keyword(s):

Respiration Rate ◽

Cold Storage ◽

Ethylene Production ◽

Storage Time ◽

Postharvest Quality ◽

Mineral Nutrient ◽

Nutrient Elements ◽

Total Anthocyanin ◽

Positive Significant Correlation ◽

Apple Fruits

<p>Fruit nutrient elements content during harvest could considerably effect on postharvest life of apples. In this study, apple fruits cultivar Red Delicious were harvested at the commercial maturity stage at 20 commercial orchards. Fruits were divided into three groups according to peel color; dark red, medium and light red. The mineral elements nutrient content such as nitrogen, phosphorus, potassium, calcium and magnesium and their ratios were measured in the harvested fruits. Thereafter, fruits were places in the cold storage at 0 °C and relative humidity of 90% for 4 months. The characteristics such as fruits weight loss, firmness, TSS, dry matter, total anthocyanin content, antioxidant activity, respiration rate and ethylene production were measured at the end of storage. The results showed a positive significant correlation between fruit firmness at the end of storage time with N+K:Ca, K+Mg:Ca, K:Ca and Mg:Ca ratios. Furthermore, a negative significant correlation was found between total anthocyanin with Nitrogen content, Mg:Ca and N:Ca ratios. The results also showed a positive significant correlation between fruit respiration rate and Nitrogen, N+K:Ca and N:Ca ratios. The analysis of regression based on mean values of three red apple groups showed a significant negative correlation between total anthocyanin with fruit ethylene production at the storage time and Mg:Ca ratio. The relationship between these two variables and Anthocyanin was expressed by the equation of regression: Anthocyanin = 100.22–1.651 Ethylene–43.963 Mg:Ca. Overall, the results confirm that measurement of fruit mineral composition during harvest time could be a strategy for predicting postharvest behaviors of apple fruits at the cold storage. Also the results showed that a relationship between mineral nutrient composition and the characteristics such as firmness, anthocyanin, respiratory rate in apple fruits.</p>

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Ascorbic acid incorporated with walnut green husk extract for preserving the postharvest quality of cold storage fresh walnut kernels

Scientia Horticulturae ◽

10.1016/j.scienta.2018.10.022 ◽

2019 ◽

Vol 245 ◽

pp. 193-199 ◽

Cited By ~ 4

Author(s):

Asaad Habibie ◽

Navid Yazdani ◽

Mahmoud Koushesh Saba ◽

Kourosh Vahdati

Keyword(s):

Ascorbic Acid ◽

Cold Storage ◽

Postharvest Quality

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Postharvest quality of essential oil treated roses

Ornamental Horticulture ◽

10.14295/oh.v23i2.993 ◽

2017 ◽

Vol 23 (2) ◽

pp. 192 ◽

Cited By ~ 1

Author(s):

Guilherme Mariano Manfredini ◽

Patrícia Duarte de Oliveira Paiva ◽

Elka Fabiana Aparecida Almeida ◽

Ângela Maria Pereira Do Nascimento ◽

Thaís Silva Sales ◽

...

Keyword(s):

Essential Oil ◽

Essential Oils ◽

Cold Storage ◽

Production Costs ◽

Postharvest Quality ◽

Vase Life ◽

Pot Life ◽

Low Toxicity ◽

Flower Quality ◽

Cold Chamber

The loss of commercial quality during storage and transportation of roses is one of the factors that reflect on production costs, leading producers to preventively apply harmful chemicals, mainly to hamper Botrytis cinerea development and reduce further losses. An alternative to increase flower longevity without contaminating the environment with harmful chemicals is the use of natural products, such as essential oils, which have fungistatic and insecticide properties, as well as low toxicity. The objective of this study was to evaluate the effect of essential oils on the vase life of Rosa cv. Avalanche: 12 treatments were tested, resulting from the combination of 5 types of essential oils plus the control in two cold storage periods (2 to 6 days) at 1 °C, 90-95% RH. The essential oils tested were eucalyptus, cinnamon, lemongrass and peppermint (1%), clove (0.1%), plus a control with distilled water. Application was made by spraying the flower buds. After storage at low temperatures, the flower stems were kept in a room (16 °C, 70% RH) during 10 days for evaluation. Flower stems stored for 2 days in a cold chamber showed better means for darkening, turgor and bent neck, as well as a lower weight loss by the stems. The application of lemongrass essential oil at 1% caused burns on the petals, compromising quality and pot life. The essential oils of peppermint and eucalyptus allowed flower quality maintenance until the 10th day of evaluation. It is possible to conclude that post-harvest spraying with peppermint or eucalyptus essential oil at 1%, combined with cold storage for 2 days, provided greater longevity and quality for cv. Avalanche roses.

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Effect of Gum Arabic and Starch-Based Coating and Different Polyliners on Postharvest Quality Attributes of Whole Pomegranate Fruit

Processes ◽

10.3390/pr10010164 ◽

2022 ◽

Vol 10 (1) ◽

pp. 164

Author(s):

Tatenda Gift Kawhena ◽

Umezuruike Linus Opara ◽

Olaniyi Amos Fawole

Keyword(s):

Weight Loss ◽

Effective Treatment ◽

Cold Storage ◽

High Density Polyethylene ◽

Gum Arabic ◽

Soluble Solids ◽

Postharvest Quality ◽

Respiration Rates ◽

Pomegranate Fruit

This study investigated the effect of gum Arabic and starch-based coating and two polyliners (Liner 1-micro-perforated Xtend® and Liner 2-macro-perforated high-density polyethylene) on whole ‘Wonderful’ pomegranate fruit during cold storage (5 ± 1 °C and 95 ± 2% RH). Uncoated (UC) and coated (GAMS) fruit were packaged into standard open top ventilated cartons (dimensions: 0.40 m long, 0.30 m wide and 0.12 m high) with (GAMS + Liner 1, GAMS + Liner 2, UC + Liner 1 and UC + Liner 2) or without (UC and GAMS) polyliners. After 42 d, treatment GAMS + Liner 1 recorded the least weight loss (4.82%), whilst GAMS recorded lower (8.77%) weight loss than UC + Liner 2 (10.07%). The highest (24.74 mLCO2 kg−1h−1) and lowest (13.14 mLCO2 kg−1h−1) respiration rates were detected in UC and GAMS + Liner 1, respectively. The highest and lowest total soluble solids were recorded for GAMS (16.87 °Brix), and GAMS + Liner 1 (15.60 °Brix) and UC + Liner 1 (15.60 °Brix), respectively. Overall, no decay was detected for coated fruit packaged with either Liner 1 or Liner 2. Therefore, the combination of GAMS with Xtend® polyliners proved to be an effective treatment to maintain the quality of ‘Wonderful’ pomegranates during storage.

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Gibberellin4+7, Benzyladenine, and Supplemental Light Improve Postharvest Leaf and Flower Quality of Cold-stored `Stargazer' Hybrid Lilies

Journal of the American Society for Horticultural Science ◽

10.21273/jashs.123.4.563 ◽

1998 ◽

Vol 123 (4) ◽

pp. 563-568 ◽

Cited By ~ 22

Author(s):

Anil P. Ranwala ◽

William B. Miller

Keyword(s):

Cold Storage ◽

Storage Temperature ◽

Postharvest Quality ◽

Flower Longevity ◽

Flower Bud ◽

Leaf Injury ◽

Leaf Chlorosis ◽

Bud Opening ◽

Flower Quality

Experiments were conducted to evaluate storage temperature, storage irradiance and prestorage foliar sprays of gibberellin, cytokinin or both on postharvest quality of Oriental hybrid lilies (Lilium sp. `Stargazer'). Cold storage of puffy bud stage plants at 4, 7, or 10 °C in dark for 2 weeks induced leaf chlorosis within 4 days in a simulated consumer environment, and resulted in 60% leaf chlorosis and 40% leaf abscission by 20 days. Cold storage also reduced the duration to flower bud opening (days from the end of cold storage till the last flower bud opened), inflorescence and flower longevity, and increased flower bud abortion. Storage at 1 °C resulted in severe leaf injury and 100% bud abortion. Providing light up to 40 μmol·m-2·s-1 during cold storage at 4 °C significantly delayed leaf chlorosis and abscission and increased the duration of flower bud opening, inflorescence and flower longevity, and reduced bud abortion. Application of hormone sprays before cold storage affected leaf and flower quality. ProVide (100 mg·L-1 GA4+7) and Promalin (100 mg·L-1 each GA4+7 and benzyladenine (BA)) effectively prevented leaf chlorosis and abscission at 4 °C while ProGibb (100 mg·L-1 GA3) and ABG-3062 (100 mg·L-1 BA) did not. Accel (10 mg·L-1 GA4+7 and 100 mg·L-1 BA) showed intermediate effects on leaf chlorosis. Flower longevity was increased and bud abortion was prevented by all hormone formulations except ProGibb. The combination of light (40 μmol·m-2·s-1) and Promalin (100 mg·L-1 each GA4+7 and BA) completely prevented cold storage induced leaf chlorosis and abscission.

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