Search Results: 1 - 10 of 100 matches for " "
All listed articles are free for downloading (OA Articles)
Page 1 /100
Display every page Item
Effect of Putrescine Application on Post-Harvest Life and Physiology of Strawberry, Apricot, Peach and Sweet Cherry Fruits  [cached]
M. R. Zokaee Khosroshahi,M. Esna-Ashari
Journal of Science and Technology of Agriculture and Natural Resources , 2008,
Abstract: Effect of different exogenous putrescine concentrations on post-harvest life of strawberry, apricot, peach and sweet cherry fruit was separately studied using completely randomized designs in three replicates. Fruits were immerged in putrescine solutions (0.3, 0.5, 1 and 2 mM for 5 minutes in strawberries, and 0.5, 1, 2, 3 and 4 mM for 10 minutes in the other fruits) and also in distilled water as control. They were then transferred into the fridge. Post-harvest life of all fruits was increased by the use of putrescine. Ethylene production and water loss of the fruits were reduced by this compound. Putrescine also prevented softening of fruit's tissue during their storage period. Titratable acidity was reduced in untreated fruits while their pH was increased. These trends were also observed with the application of putrescine in all fruits, but at a much slower rate compared with the controls. Soluble solids content of sweet cherry fruits was increased by the use of putrescine while it was reduced in the other three fruits.
Shelf Life of Ten Guava Varieties under Different Post Harvest Treatments in on Season
Shamim Ara Begum,M.A.Rahim,M.A.Haider,M.A. Kader
Pakistan Journal of Biological Sciences , 2002,
Abstract: The experiment was carried out to study the shelf life of guava under different post harvest treatments. Qualities of fruits of different varieties decreased with the advancement of storage duration and most were found to lose their marketability at the later stage except Kazi and Swarupkathi. In case of wrapping materials, white and black perforated polythene bags were better in on season for retaining marketability of guava fruits as compared with other treatments. Considering combined effect of variety and wrapping materials, fruits of the Kazi showed the longer duration of marketability among 10 varieties with all treatments. Weight loss of different guava varieties increased with increasing storage duration. Variety Kazi showed the lowest percentage of weight loss. In case of wrapping materials, black and white perforated polythene bags gave minimum weight loss. Based on combined effect of variety and wrapping materials, the variety Kazi showed minimum weight loss among 10 varieties in all wrapping treatments.
Effect of Calcium Chloride Application on Firmness and Post Harvest Retention of Berry Grape ( Vitis vinifera L.) cv. Askari  [cached]
M. H. Farahi,K. Goodarzi
Journal of Science and Technology of Agriculture and Natural Resources , 2008,
Abstract: The aim of the study was to examine the effect of CaCl2 on the firmness and post harvest retention of Berry Grape (Vitis vinifera L.) cv. Askari. The experiment was carried out in 2006 in vineyard in the Sisakht region in a completely randomized design with 7 treatments. Experiment includes two parts: 1- spray with 3 levels 0.1, 0.25 and 0.5 %. (Two weeks before harvest and repeated one day before harvest); and 2- Dipping clusters in CaCl2 solution with 3 levels 1, 2.5 and 5 % post harvest. Grapes were stored at 0oc for 1 month in cold store room. Results showed that the effect of CaCl2 was significant on post harvest abscission berries percentage at 1% level. Minimum post harvest abscission of berries percentage was observed using 5% dipping and 0.25% spray after 30 days storage in cold storage room. Highest abscission of berries was observed in control. Effect of CaCl2 on decay berry was significant at 1% level after 30 days of storage. Minimum decay percentage was observed in 0.25 % spray and the highest decay percentage was obtained in control. Effect of CaCl2 on palatability (TSS/TA) was significant at 1%level.
Evaluation of vegetable extracts for control of the pathogenic fungi in banana and strawberry in post harvest storage Evaluación de extractos vegetales para manejo de hongos patógenos en banano y fresa almacenados
López Angélica,Vélez Mónica,Sánchez O Manuel Salvador,Bonilla Correa Carmen Rosa
Acta Agronómica , 2006,
Abstract: This study was carried out get knowledge about fungicidal properties of vegetable extracts to the control of the pathogenyc fungi (Colletotrichum musae and Botrytis cinerea) in banana (Musa sapientum) and strawberry (Fragaria sp) during the pos harvest storage, at the National University of Colombia headquarters in Palmira. Ethanolics extracts of the following vegetable species were evaluated: Plantago major L, Ruta graveolens L, Lippia alba (Mill) NE BROS), Pteridium aquilinum (Kaulf) Maxon. The extracts were obtained by the percolation method starting from the macerated material (100 g) and 1000 ml of solvent. The fungi was isolated from the strawberry (Fragaria sp) affected by B. cinerea and banana Gross mitchel affected by C. musae. To evaluate the control of the fungi C. musae and B. cinerea sixteen treatments were used (four extracts of plants, two extraction media, two dilutions and three repetitions). Three control treatments were added: absolute (PDA); solvent (PDA + ethanol or water); and chemical (PDA + chemical fungicide). The dilutions were prepared with the solvent used to obtain the extract. The evaluation in vitro was maid with ethanolics extracts diluted at 25%, because these presented the best results in the previous tests. The results indicate that the ethanolic solvent decreased the development of the fungi in 68%. The fruits in which the etanolic extract of ruda and pronto alivio was applied presented bigger incidence and grade of severity. Keys words: Vegetable extract; patogenic fungi; Colletotrichum musae; Botrytis cinérea; post harvest En la Universidad Nacional de Colombia -Sede Palmira, se obtuvieron extractos etanólicos (1.000 ml), macerados (100 g) de llantén (Plantago major L), ruda (Ruta graveolens L), pronto alivio [Lippia alba (Mill) NE BROS] y helecho marranero [Pteridium aquilinum (Kaulf) Maxon]. Para la evaluación del control de C. musae y B. cinerea se utilizaron dieciséis tratamientos (cuatro extractos de plantas, dos medios de extracción, dos diluciones y tres repeticiones).Se adicionaron tres testigos: absoluto (PDA); solvente (PDA + etanol o agua); y químico (PDA + fungicida químico). Las diluciones se realizaron con el solvente de obtención del extracto. La evaluación in vivo se realizó con extractos etanólicos diluidos al 25%. El solvente etanólico disminuyó el desarrollo de los hongos en 68%. Los frutos donde se aplicó el extracto de ruda y pronto alivio presentaron mayor incidencia y grado de severidad. Palabras claves: Plantago major; Ruta graveolens; Lippia alba; Pteridium aquilinum; Colletotrichum musae; B
Influence of Post Harvest Calcium Chloride Application, Ethylene Absorbent and Modified Atmosphere on Quality Characteristics and Shelf Life of Apricot (Prunus armeniaca L.) Fruit During Storage  [PDF]
Saira Ishaq,Habib Ahmed Rathore,Tariq Masud,Sartaj Ali
Pakistan Journal of Nutrition , 2009,
Abstract: The effect of different concentrations of CaCl2 (1, 2 and 3%) with the combination of oxidizing agent like Potassium permanganate (KMnO4) on storage life of apricot fruit packaged in sealed Polyethylene bags was investigated at ambient temperature (Relative humidity 60-63% and temperature 28-30oC) during storage. The quality characteristics such as weight loss, total soluble solids, titratable acidity, ascorbic acid and sensory parameters like color, texture, taste, flavour and overall acceptability were studied at an interval of 2 days (0, 2nd, 4th, 6th, 8th and 10th day) for a total period of 10 days during storage. All of the 9 treatments had shown a highly significant effect (p<0.05) on storage life and quality parameters of fruits. However, the treatment T4 (KMnO4 + 3% CaCl2 + Polyethylene bags) was most effective in the retention of higher contents of vitamin C (11.47 mg/100 g), total soluble solids (12.58%), titratable acidity (0.72%) and sensory parameters like colour (4.97), texture (6.23), taste (6.52), flavour (6.38) and the higher overall acceptability score (6.72) with minimum weight loss (3.66%) in T4. Compared to control fruit showed maximum weight loss (9.5%), lower vitamin C (9.55 mg/100 g), titratable acidity (0.67%), total soluble solids (10.58%) and lower quality score like colour (3.92), texture (4.83), taste (4.79), flavour (4.43) and the lower score (4.6) of overall acceptability during storage whereas the Treatment T3 (3% CaCl2+Polyethylene bags) was found better to all other treatments during storage. The treated apricot fruit have increased storage life up to 10 days as compared to control which was un acceptable after 6th day of the storage.
Post harvest of pink ginger floral stems treated with silver thiosulphate, sucrose, and calcium
Silva, Antonio Tarciso C da;Ferreira, Vilma M;Graciano, érika SA;Souza, Renan C de;Araújo Neto, Jo?o C de;Loges, Vivian;
Horticultura Brasileira , 2009, DOI: 10.1590/S0102-05362009000300018
Abstract: the brazilian market of tropical flowers has been growing broadly with a strong participation of the northeast region, where the state of alagoas stands out. among the exporting tropical cut flowers, pink ginger (alpinia purpurata (vieill) k. schum) has been one of the most promising species. aiming at delaying senescence in floral stems of pink ginger, two laboratory experiments were carried out at the agricultural science center of the federal university of alagoas. in the first experiment, three different exposure periods (30; 60, and 120 minutes) to silver thiosulphate 1 mm were tested, followed or not by pulsing in a 20% sucrose solution, for 12 hours. in the second experiment, we evaluated the effect of adding calcium sulphate 50 and 100 mm, sodium silicate 1.25 and 2.5 mm, and the combination of calcium sulphate 50mm + sodium silicate 1.25mm on the hydric status and longevity of floral stems. in both experiments, the control treatment consisted of keeping stems in distilled water. fresh biomass and quality of floral stems were determined every other day. silver thiosulphate applied in pulsing for 60 minutes or more led to stem dehydration, whereas calcium sulphate improved both stem hydration and commercial durability.
Effect of Calcium Chloride and Salicylic Acid Treatments on Quality Characteristics of Kiwifruit (Actinidia deliciosa cv. Hayward) During Storage  [PDF]
M. Kazemi,M. Aran,S. Zamani
American Journal of Plant Physiology , 2011,
Abstract: Kiwifruit texture can deteriorate during cold storage, resulting in softness and mealiness. The purpose of this work was to estimate shelf-life and to study the behavior of Actinidia deliciosa cv. Hayward kiwifruit kept at 1C in a normal atmosphere. The effects of postharvest calcium chloride and salicylic acid applications on shelf-life and quality attributes of kiwifruits (Actinidia deliciosa cv. Hayward) after harvest or cold storage up to 60 days were determined. The experiment was started in season 2010-2011 and fruit weight losses, fruit firmness, total soluble solids (TSS), titratable acidity (TA), Peroxidase activity (POD) and ascorbic acid content (Vitamin C) were measured at 15, 30 and 60th days of postharvest life. The fruits were immersed in deionised water or at three calcium concentrations (0, 2 and 4% (W/V) and three salicylic acid concentrations (0, 2 and 4 mM). Results showed that fruit weight loss significantly decreased in combined treatment (calcium+salicylic acid) in comparison to control. Also, results showed that combined treatment (calcium+salicylic acid) increase fruit firmness and Peroxidase activity, while decreasing weight losses percentages and fruit decay percentage during cold storage at 1C for 60 days (p=0.05). Results showed that postharvest calcium chloride dips did not effect TA % in kiwifruit in during storage, while the fruits treated in SA solution for 5 min had higher TA and lower TSS than fruits that treated in control and Ca (p=0.05). Furthermore, significant changes were observed in browning index and relative electrical conductivity during storage in all treatments (p=0.05). The results showed that combined treatment (calcium+salicylic acid) application was influenced on Vitamin C value in comparison to control. In general, this experiment showed that post-harvest Salicylic acid (SA) and Ca treatments prevented fruit softening and decreased weight losses. This treatment can be easily used to improve of apple fruits during.
Mamta Bhatia* and Alka Sharma
International Journal of Pharmaceutical Sciences and Research , 2012,
Abstract: In present study, eugenol (major functional component of essential oil of Syzygium aromaticum (clove), at 2% level (v/v) was incorporated in peanut oil based coating to get antimicrobial emulsion. Eugenol emulsion thus prepared was applied on grapes and strawberries. After applying emulsion, reference fruits were kept in corrugated fiber boxes for 8 days for shelf life studies under ambient conditions (temperature 24-27°C; Relative Humidity 55±5%). Fruit samples were checked for their visible microbiological growth every day and sensory evaluation of the coated samples was done up to the day of initiation of visible microbial growth. Results revealed that eugenol emulsions did not produced desirable effect on the shelf life of grapes and strawberries.
Post-harvest conservation of organic strawberries coated with cassava starch and chitosan
Campos, Raquel P;Kwiatkowski, Angela;Clemente, Edmar;
Revista Ceres , 2011, DOI: 10.1590/S0034-737X2011000500004
Abstract: the strawberry is as non-climacteric fruit, but has a high post-harvest respiration rate, which leads to a rapid deterioration at room temperature. this study aimed to evaluate the application of biodegradable coating on postharvest conservation of organic strawberries, cv. camarosa, packed in plastic hinged boxes and stored at 10oc. the treatments consisted of: a) control; b) 2% cassava starch; c) 1% chitosan; and d) 2% cassava starch + 1% chitosan. physical and chemical characteristics of fruits were evaluated at 3, 6 and 9 days of storage, and microbiological and sensory analyses were carried out at the end of the storage period. the treatments influenced positively the post-harvest quality of organic strawberries. the coating cassava starch + chitosan provided the best results, with less than 6% of loss in fruit mass, lower counts of yeast and psychrophilic microorganisms and the best appearance according to the sensory analysis.
Post Harvest and Cold Storage Losses in Apple of Balochistan  [PDF]
Nisar Ali Shah,Shahjahan Khan,Manzoor Ahmad Kasi,S. M. Khair
Asian Journal of Plant Sciences , 2002,
Abstract: The apple of the province is famous for its distant and quality. Where as the significant quantity of apple produced traded to other provinces mainly Punjab and Sindh. Balochistan is the largest province of the country but have the poorest communication and infrastructure development which results in higher post harvest storage and transportation losses. To increase the shelf-life and maintain the quality of perishable produce cool temperature can play an important role. In Balochistan there are two cold stores with the capacity of 700 tones. On an average in cold storage 17 percent damaged apples were found in a crate, the basic reason for this damage was uneven grading and tight package in wooden crates, as mostly the farmer put, the bold apples on top, while the immature and infected apples at the bottom. Out of these 12 percent were not consumed. Furthermore, in a wooden crates there is an additional cost on waste product of apple in the form of packing, transportation, labor, commission, storage, etc. During March 70% of apple were "Shin Kulu" and the rest were other varieties i.e. Tore kulu, Kashmiri, Mashadi, and Gaja. in Quetta market. The grade wise distribution of apple in a crate of `Tor Kulu` were 10 and 4 kgs with price tag of Rs. 30/ and 16 for A and B grade. It accounts for almost 35 percent of apples produced in Balochistan. Almost, similar trend were reported in `Shin Kulu` the apple texture is firm which gives it longer shelf life compared to other varieties. The grade wise distribution of apple in `Shin Kulu` were 8,5 and 2 kgs. with a price tag of Rs. 24, 12 and 8 for A, B and C grade within the crate, respectively. In other apple varieties i.e., `Amri` and `Mashadi` grade wise distribution were 5,7,3 and 7,5,1 kgs. Balochistan marketing channel constitute of producers, contractors, commission agents, ladanwala, whole salers and retailers
Page 1 /100
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.