Blueberry supply chain: Critical steps impacting fruit quality and application of a boosted regression tree model to predict weight loss
زنجیره تأمین زغال اخته: مراحل مهم تأثیر بر کیفیت میوه و استفاده از مدل درخت رگرسیون تقویت شده برای پیش بینی کاهش وزن-2021
Blueberries have increased in popularity in recent years due to their nutritional benefits and sensory characteristics. However, to preserve quality and extend shelf-life, they need to be maintained at refrigerated temperatures and high relative humidity, conditions that are not routinely met along the supply chain. Poor temperature management leads to quality deterioration, increasing waste/losses along the supply chain. This study examined the impact of each step along the supply chain on the physicochemical quality and shelf-life of blueberries, identifying the most critical steps from field to consumption. The following steps were identified acritical in the blueberry supply chain: shipping to distribution centre (DC) (72 h at 5 ◦C), store display (48 h at15 ◦C), and consumer (48 h at 20 ◦C). Given the economic importance of weight loss and its link to fruit quality and shelf-life, a boosted regression tree (BRT) model was built to predict weight loss using the post-harvest environmental conditions of a simulated supply chain applying different temperature-time scenarios. The model explained 84 % of the variance on the test set and highlighted the interactions of supply chain conditions on weight loss.
Keywords: Cold chain | Shelf-life | Machine learning | Biochemical properties | Post-harvest storage
Comparative life cycle analysis of a biodegradable multilayer film and a conventional multilayer film for fresh meat modified atmosphere packaging – and effectively accounting for shelf-life
تجزیه و تحلیل چرخه زندگی مقایسهای یک فیلم چند لایه زیست تخریبپذیر و یک فیلم چند لایه معمولی برای بستهبندی با اتمسفر اصلاحشده گوشت تازه - و به طور موثری برای محاسبه مدت ماندگاری-2021
Life cycle analyses of novel food packaging materials do not often account for the environmental impact of a change in shelf-life, which can result in misleading comparisons. This paper established a methodology for comparative life cycle analyses, whereby the direct effects of the lidding films were compared whilst ensuring the indirect effects of the wasted food portion remained stable. Global warming potential and non-renewable energy use were analysed for a conventional (low-density polyethylene/ethylene vinyl alcohol) versus a biodegradable (polyhydroxyalkanoate/butenediol vinyl alcohol) multilayer lidding film for modified atmosphere packaging of minced beef. Two methodologies were investigated. The first (metric one) changed the barrier layer thickness in the biodegradable film to match the carbon dioxide transmission rate with that of a conventional film. The second (metric two) changed the barrier layer thickness to match a carbon dioxide transmission rate predicted by a mathematical model to ensure the same shelf-life as the conventional film. Using metric two over metric one resulted in 1) a thinner film 2) 2.3 times lower global warming potential. When using sugar beet as the biopolymer feedstock and the current UK disposal system, the biodegradable film had 135% higher global warming potential than the conventional film. By incorporating waste products and better farming practices, the global warming potential of the biodegradable film could be up to 92% lower than that of the conventional film. This work demonstrates how shelf-life can be incorporated into life cycle analyses and the importance of ac- counting for it, in particular when evaluating biodegradables which often have higher permeabilities.
keywords: تجزیه و تحلیل چرخه زندگی | لایه مانع | فیلم لجن | بسته بندی گوشت | عمر مفید | زباله های مواد غذایی | Life cycle analysis | Barrier layer | Lidding film | Meat packaging | Shelf-life | Food waste
Applying CS and WSN methods for improving efficiency of frozen and chilled aquatic products monitoring system in cold chain logistics
استفاده از روش CS و WSN برای بهبود بهره وری از سیستم نظارت محصولات ابزی منجمد و سرد در تدارکات زنجیره سرد-2016
Wireless Sensor Network (WSN) is applied widely in food cold chain logistics. However, traditional monitoring systems require signiﬁcant real-time sensor data transmission which will result in heavy data trafﬁc and communication systems overloading, and thus reduce the data collection and transmission efﬁciency. This research aims to develop a temperature Monitoring System for Frozen and Chilled Aquatic Products (MS-FCAP) based on WSN integrated with Compressed Sending (CS) to improve the efﬁciency of MS-FCAP. Through understanding the temperature and related information requirements of frozen and chilled aquatic products cold chain logistics, this paper illustrates the design of the CS model which consists of sparse sampling and data reconstruction, and shelf-life prediction. The system was imple- mented and evaluated in cold chain logistics between Hainan and Beijing in China. The evaluation result suggests that MS-FCAP has a high accuracy in reconstructing temperature data under variable temper- ature condition as well as under constant temperature condition. The result shows that MS-FCAP is capable of recovering the sampled sensor data accurately and efﬁciently, reﬂecting the real-time tem- perature change in the refrigerated truck during cold chain logistics, and providing effective decision support traceability for quality and safety assurance of frozen and chilled aquatic products.© 2015 Elsevier Ltd. All rights reserved.
Food safety and traceability | Cold chain logistics | Monitoring system | Wireless sensor network | Compressed sensing
Food traceability: New trends and recent advances: A review
قابلیت ردیابی مواد غذایی: گرایش های جدید و پیشرفت های اخیر: بازنگری-2015
Current traceability systems are characterized by the inability to link food chains records, inaccuracy and errors in records and delays in obtaining essential data, which are fundamental in case of food outbreak disease; these systems should address the recall and withdraw of non-consumable products. The present paper provides a review of the various latest technological advancements such as innovative imple- mentations of RFID that can make to increase the sales of wheat ﬂour, or allowing the consumer to know the full record of the IV range products through the smartphone; knowing the food authenticity with an isotope analysis or by analysing the DNA sequences. There are also presented some conceptual ad- vancements in the ﬁeld of food traceability such as the development of a common framework towards unifying the present technical regulations, the interconnectivity between agents, environment loggers and products, all of them in the form of Internet of things system as well as the development of intel- ligent traceability, where it is possible to retrieve the temperature of a product or its remaining shelf-life.These new techniques and concepts provide new opportunities for enhancing the efﬁciency and compatibility of the present traceability systems.© 2015 Elsevier Ltd. All rights reserved.
Keywords: Food traceability | Food control | Traceability systems | Internet of things