scholarly journals Effects of postharvest application of UV-C radiation on the control of microorganisms and maintenance of quality in strawberries

2019 ◽  
Author(s):  
Gabriel Palma Petrielli ◽  
Franciane Colares Souza Usberti ◽  
Raysa Maduro Alves
Keyword(s):  
Fruits And Vegetables ◽  
Low Cost ◽  
Storage Conditions ◽  
Postharvest Diseases ◽  
Toxic Compounds ◽  
Postharvest Application ◽  
And Storage ◽  
Uv C ◽  
Different Doses ◽  
High Metabolic Activity

Because it is a highly perishable fruit, due to its high metabolic activity and water content, the strawberry has a shelf life limited by weight loss, texture alteration and microbiological deterioration. Such susceptibility to proliferation of microorganisms and the occurrence of postharvest diseases, especially some rot, stimulates the study of alternative sanitizing treatments that aims at the maintenance of fruit quality such as ultraviolet radiation, which it exhibits germicidal properties in the region UV-C (200-280nm). The non-formation of residual toxic compounds on the surface of the product, a low cost and the fact of being odorless are advantages of its use in fruits and vegetables.¹ In the present study the objective was to evaluate the efficacy and effects of UV-C radiation in strawberries by applying 0.0 (T1), 1.25 (T2), 2.50 (T3), 3.75 (T4) and 5.0 (T5) kJ/m² and storage at 5.37 ± 0.74 ºC and 53.38 ± 6.84% RH after irradiation. The experiment was conducted in a completely randomized blocks design with three replicates per treatment. In the results, it was not possible to observe some benefits of UV-C in strawberries in relation to their non-use, suggesting it needs further studies with different doses and storage conditions.

Understanding the Role of Chlorine and Ozone to Control Postharvest Diseases in Fruit and Vegetables: A Review

2020 ◽  
Vol 16 (4) ◽  
pp. 455-461
Author(s):  
Gabriela M. Baia ◽  
Otniel Freitas-Silva ◽  
Murillo F. Junior
Keyword(s):  
Chlorine Dioxide ◽  
Broad Spectrum ◽  
Fruits And Vegetables ◽  
Low Cost ◽  
Residual Effects ◽  
Pathogenic Microorganisms ◽  
Postharvest Diseases ◽  
Post Harvest ◽  
By Products

Fruits and vegetables are foods that come into contact with various types of microorganisms from planting to their consumption. A lack or poor sanitation of these products after harvest can cause high losses due to deterioration and/ or pathogenic microorganisms. There are practically no post-harvest fungicides or bactericides with a broad spectrum of action that have no toxic residual effects and are safe. However, to minimize such problems, the use of sanitizers is an efficient device against these microorganisms. Chlorine is the most prevalent sanitizing agent because of its broad spectrum, low cost and well-established practices. However, the inevitable formation of disinfection by-products, such as trihalomethanes (THMs) and haloacetic acids (HAAs), is considered one of the main threats to food safety. Alternative sanitizers, such as chlorine dioxide (ClO2) and ozone, are becoming popular as a substitute for traditional post-harvest treatments. Thus, this review addresses the use of chlorine, chlorine dioxide and ozone emphasizing aspects, such as usage, safe application, spectrum of action and legislation. In order to ensure the quality and safety of final products, the adoption of well-prepared sanitation and sanitation programs for post-harvest fruits and vegetables is essential.

scholarly journals DETERMINATION OF BTEX IN ENVIRONMENTAL SAMPLES: DEVELOPMENT AND PROTECTION OF TECHNOLOGIES AND ANALYTICAL METHODS

2019 ◽  
Vol 16 (31) ◽  
pp. 431-439
Author(s):  
Helilma de Andréa PINHEIRO ◽  
Ana Paula Mota FERREIRA ◽  
Ismael Carlos Braga ALVES ◽  
Antônio Fernandes SANTOS JÚNIOR ◽  
Raquel Bezerra dos Santos SAWCZUK ◽  
...  
Keyword(s):  
Petroleum Hydrocarbons ◽  
Environmental Samples ◽  
Low Cost ◽  
The United States ◽  
Operational Control ◽  
Toxic Compounds ◽  
Chromatographic Techniques ◽  
Benzene Toluene ◽  
And Storage

The contamination of water and soil by petroleum hydrocarbons is reported quite frequently, mainly due to accidents involving transport and storage of fuels. Among the most toxic compounds the most volatile benzene, toluene, ethylbenzene and xylene (BTEX). Residues of these compounds can cause serious environmental and public health troubles. Thus, more sensitive, selective and low-cost techniques, focused on the analysis and monitoring of these contaminants are being developed in order to establish operational control and to comply with local laws, but the intellectual property of such technologies is still unknown. The present study shows the panorama about patents, thesis and dissertations which have been already published on this theme. Together, the United States and China hold the largest number of patents, and most of thesis/dissertations describe methodologies for BTEX detection in water, although numerous environmental problems caused by oils in the soil had been reported. Also, the methods based on chromatographic techniques stand out in relation to the other techniques. It was possible to verify important advances in the field of sensors, especially the electrochemical ones, in order to solve the analytical gaps.

Standardization of a Method To Determine the Efficacy of Sanitizers in Inactivating Human Pathogenic Microorganisms on Raw Fruits and Vegetables

2001 ◽  
Vol 64 (7) ◽  
pp. 1079-1084 ◽  
Author(s):  
LARRY R. BEUCHAT ◽  
JEFFREY M. FARBER ◽  
EDITH H. GARRETT ◽  
LINDA J. HARRIS ◽  
MICKEY E. PARISH ◽  
...  
Keyword(s):  
Standard Method ◽  
Fruits And Vegetables ◽  
Storage Conditions ◽  
Basic Method ◽  
Pathogenic Microorganisms ◽  
Wide Range ◽  
Survival And Growth ◽  
And Storage ◽  
Reference Strains ◽  
Basic Standard

The efficacy of sanitizers in killing human pathogenic microorganisms on a wide range of whole and fresh-cut fruits and vegetables has been studied extensively. Numerous challenge studies to determine the effects of storage conditions on survival and growth of pathogens on raw produce have also been reported. Results of these studies are often difficult to assess because of the lack of sufficient reporting of methods or, comparatively, because of variations in procedures for preparing and applying inocula to produce, conditions for treatment and storage, and procedures for enumerating pathogens. There is a need for a standard method to accurately determine the presence and populations of pathogenic microorganisms on produce. The adoption of standard, well-characterized reference strains would benefit a comparative assessment of a basic method among laboratories. A single protocol will not be suitable for all fruits and vegetables. Modifications of a basic method will be necessary to achieve maximum recovery of pathogens on various types of produce subjected to different sanitizer or storage treatments. This article discusses parameters that must be considered in the course of developing a basic standard method against which these modifications could be made.

scholarly journals A simulation model to investigate impacts of facilitating quality data within organic fresh food supply chains

2019 ◽  
Author(s):  
Magdalena Leithner ◽  
Christian Fikar
Keyword(s):  
Supply Chain ◽  
Fruits And Vegetables ◽  
Organic Food ◽  
Storage Conditions ◽  
Quality Data ◽  
Food Supply Chains ◽  
Fresh Food ◽  
Simulation Based ◽  
And Storage ◽  
Rural Production

Abstract Demand for and production of organic fresh food play an increasing role worldwide. As a result, a growing amount of fresh fruits and vegetables has to be transported from predominantly rural production regions to customers mostly located in urban ones. Specific handling and storage conditions need to be respected along the entire supply chain to maintain high quality and product value. To support organic food logistics operations, this work investigates benefits of facilitating real-time product data along delivery and storage processes. By the development of a simulation-based decision support system, sustainable deliveries of organic food from farms to retail stores are investigated. Generic keeping quality models are integrated to observe impacts of varying storage temperatures on food quality and losses over time. Computational experiments study a regional supply chain of organic strawberries in Lower Austria and Vienna. Results indicate that the consideration of shelf life data in supply chain decisions allow one to reduce food losses and further enables shifting surplus inventory to alternative distribution channels.

scholarly journals A COMBINED METHOD OF POST-HARVEST HANDLING OF SWEET CHERRY FRUIT VERSUS FRUIT STORABILITY

2021 ◽  
Vol 20 (4) ◽  
pp. 29-41
Author(s):  
Anna Zieniewicz-Bajkowska ◽  
Robert Rosa ◽  
Jolanta Franczuk ◽  
Maja Molska ◽  
Małgorzata Kowalska
Keyword(s):  
Sweet Cherry ◽  
Storage Temperature ◽  
Treatment Method ◽  
Storage Conditions ◽  
Total Phenolic ◽  
Physical Factors ◽  
Postharvest Treatment ◽  
Postharvest Handling ◽  
And Storage ◽  
Uv C

The objective of the research was to determine an optimum method of postharvest handling of sweet cherry fruits which may contribute to prolonged shelf-life. The following physical factors were examined – storage temperature: 2–4°C, 6–8°C, 18–20°C; postharvest fruit packaging and treatment: Xtend® CH-49 bags + no exposure to UV-C, Xtend® + exposure to UV-C for 120 s or 600 s, no bagging + no exposure to UV-C, no bagging + UV-C for 120 s or 600 s. UV-C irradiation, regardless of the duration and storage conditions, prolonged the storage life of sweet cherry fruit. During the 14-day period of storage, the smallest weight loss as well as the highest number of fruits suitable for consumption were found after exposure to UV-C for 600 s in both Xtend® bags and flat, exposed polyethylene containers. After 28 days, higher amount of fruits suitable for consumption were found after storage at 2–4°C than at 6–8ºC. The most advantageous postharvest treatment method was placing fruits in containers and irradiating them with UV-C for 600 s. However, statistically similar results were obtained also after packing the fruits in Xtend® bags and irradiating them with UV-C for 600 s as well as placing them in containers and irradiation with UV-C for 120 s. In addition, UV-C irradiated fruits for 120 s and 600 s contained significantly more reducing sugars than non-irradiated fruits after 14 days of storage. UV-C irradiated fruits for 600 s also contained the greatest amount of flavonoids. After 28 days of storage, the highest content of flavonoids and phenols was determined in UV-C exposed fruits stored in containers. In addition, it emerged that storing sweet cherry fruit at 2–4°C without bagging contributed to increased total phenolic content compared with fruit stored in Xtend® bags. Packaging cherry fruit in Xtend® bags is the most reasonable when it stored at 6–8°C and at room temperature.

scholarly journals Effect of Transport and Storage on the Weight and Moisture Loss of Exotic Fruits

2019 ◽  
Vol 49 (1) ◽  
pp. 120-126
Author(s):  
Надежда Величко ◽  
Nadezhda Velichko ◽  
Елизавета Рыгалова ◽  
Elizaveta Rygalova ◽  
Лидия Шароглазова ◽  
...  
Keyword(s):  
Weight Loss ◽  
Fruits And Vegetables ◽  
Storage Conditions ◽  
Moisture Loss ◽  
Winter Period ◽  
Flight Duration ◽  
The Russian Federation ◽  
Loss Of Mass ◽  
Exotic Fruits ◽  
And Storage

Every year, hundreds of thousands of tons of fruits and vegetables are supplied to the territory of the Russian Federation by exporting producers from different countries. During transportation and storage, the supplied fruits and vegetables undergo various physical and biochemical changes, leading to weight loss and changes in quality indicators. Loss of moisture during transportation is one of the main causes of damage to fruits and vegetables. The relevance of the research topic is determined by the need to minimize the loss of mass and moisture of exotic fruits during transportation and storage in warehouse conditions.Objective: to establish the rates of loss of 10 samples of exotic fruits. The samples included Thai pineapple, Thai watermelon, guava, cantaloupe melon, carambola, Thai mango, papaya of Holland variety, green papaya, passionflower (passion fruit, pitaya). The fruits were transported by air from Thailand (Bangkok) to Krasnoyarsk. The flight duration was 8 hours, flight altitude – 10,000 m. The storage conditions were as follows: temperature – 5–8°C, humidity – 47%, storage time – 10 days in winter period. The paper presents the results obtained for the dynamics of mass and humidity during transportation by air of samples of exotic fruits and during storage in warehouse conditions. It was established that the loss of mass and moisture of exotic fruits in the process of transportation and storage occurred in all samples. The highest percentage of weight loss was observed in Thai mango and amounted to 2.93%. The greatest loss of moisture during storage in warehouses was observed in Thai watermelon (3.5%), the smallest – in Thai pineapple (0.5%). The largest weight loss was set for guava (4.6%), the smallest – for Thai watermelon (0.5%).

scholarly journals Bacillus Spp.: Efficient Biotic Strategy to Control Postharvest Diseases of Fruits and Vegetables

Plants ◽  
2019 ◽  
Vol 8 (4) ◽  
pp. 97 ◽  
Author(s):  
Lastochkina ◽  
Seifikalhor ◽  
Aliniaeifard ◽  
Baymiev ◽  
Pusenkova ◽  
...  
Keyword(s):  
Fruits And Vegetables ◽  
Systemic Resistance ◽  
Postharvest Diseases ◽  
Safe Alternative ◽  
Scientific Databases ◽  
Food Industries ◽  
Storage Losses ◽  
Bacillus Spp ◽  
And Storage ◽  
Storage Type

: Postharvest diseases significantly reduce the shelf-life of harvested fruits/vegetables worldwide. Bacillus spp. are considered to be an eco-friendly and bio-safe alternative to traditional chemical fungicides/bactericides due to their intrinsic ability to induce native anti-stress pathways in plants. This review compiles information from multiple scientific databases (Scopus, ScienceDirect, GoogleScholar, ResearchGate, etc.) using the keywords “postharvest diseases”, “Bacillus”, “Bacillus subtilis”, “biocontrol”, “storage”, “losses”, and “fruits/vegetables”. To date, numerous examples of successful Bacillus spp. application in controlling various postharvest-emerged pathogens of different fruits/vegetables during handling, transportation, and storage have been described in the literature. The mechanism/s of such action is/are still largely unknown; however, it is suggested that they include: i) competition for space/nutrients with pathogens; ii) production of various bio-active substances with antibiotic activity and cell wall-degrading compounds; and iii) induction of systemic resistance. With that, Bacillus efficiency may depend on various factors including strain characteristics (epiphytes or endophytes), application methods (before or after harvest/storage), type of pathogens/hosts, etc. Endophytic B. subtilis-based products can be more effective because they colonize internal plant tissues and are less dependent on external environmental factors while protecting cells inside. Nevertheless, the mechanism/s of Bacillus action on harvested fruits/vegetables is largely unknown and requires further detailed investigations to fully realize their potential in agricultural/food industries.

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