Abstract Fresh vegetables and fruits need oxygen (O2) to carry out their metabolic activities, particularly respiration. The procedure where the actively respiring commodity is sealed in film packages made of polymer to change the CO2 and O2 levels of concentration inside the package environment required to increase shelf-life and preserve freshness is referred to as modified atmosphere packaging (MAP). To affect the product's metabolism being packaged or the activity of organisms that cause degradation to extend the time of preservation, it is frequently desired to create an environment high in CO2 and low in O2. MAP changes the environment and increases moisture preservation that has a bigger impact on quality preservation. Moreover, packing separates the product from the surrounding environment, assisting in the creation of circumstances that, if not hygienic, at the very least minimize exposure to infections and pollutants, as well as physiological damage. MAP is a dynamic mechanism that occurs concurrently throughout permeation and respiration. As a result, MAP design necessitates the assessment of the product's intrinsic features, such as film permeability, optimal O2 and CO2 gas concentrations, and respiration rate. The goal of MAP design is to specify parameters that will provide the greatest feasible environment within the package for increasing the product's shelf-life in the quickest possible time. This is accomplished by synchronizing the packed produce's respiration rate with O2 and CO2 gas penetration rate through the film. The current study contains a detailed discussion of all of these elements of MAP.

Abstract Aiming at the problem that it is difficult to achieve rapid and accurate detection of pesticide residues, the artificial neural network method is used to separate the mixed fluorescence spectra in the measurement of acetamiprid pesticide residues, and a fluorescence spectrum that can quickly detect the pesticide residues of acetamiprid on solid surfaces is designed. According to the back-propagation algorithm, the three-layer artificial neural network principle is used to detect the acetamiprid residue in the mixed system of acetamiprid and filter paper with severely overlapping fluorescence spectra. In the range of 340nm~400nm, using the fluorescence intensity values at 20 characteristic wavelengths as the characteristic network parameters, after network training and testing, the recovery rates of acetamiprid concentrations of 40mg/kg and 90mg/kg are 102% and 97%, respectively. The relative standard deviations of the determination results were 1.4% and 1.9%, respectively. The experimental results show that the BP neural network-assisted fluorescence spectroscopy method for the determination of acetamiprid pesticide residues on filter paper has the characteristics of fast network training, short detection period, and high measurement accuracy.

Abstract Fermentation is a popular food preservation process that improves nutritional and organoleptic qualities, shelf life, and food safety. Fermented fish is produced and consumed in many regions of the world, and it is an integral element of many cuisine traditions. Fermented fish is also a substantial industry in several countries and a rich source of intriguing bacteria. Most of the end product quality of wine and meat, including taste, texture, and nutritional content, is determined by the main and secondary microbial metabolism formed during fermentation. A standard procedure in the food industry is the addition of salt to thermally processed meat and fish products in order to avoid weight loss that may otherwise have occurred due to the decreased water retaining capability caused by heat treatment. This article aims to bring you up-to-date on the different varieties of fermented fish and their production processes around the world. As a result, new methods that focus on limiting or accelerating fish products' heating are essential. Alternative heat transfer technology, such as combi-steamers or water baths, is used in both situations to increase heat transfer, allowing for faster heating and minimizing excessively heavy heat loads on parts of the product.

Abstract Propylene glycol (PG) is a substance commonly used in many cosmetic products or as an additive in foods. Food officials in the United States and Europe have stated that oral consumption of this substance is generally safe. However, there is a lot of discussion about PG. Reports of PG poisoning are mostly related to inappropriate intravenous use or accidental overuse by children. Because of its low risk of food poisoning, it is recognized by the Food and Drug Administration (FDA) as a relatively safe substance as a food additive such as frozen desserts, ice cream and frozen foods. This article examines what is oral propylene glycol and why is it used? Also, in the current study, it was tried to answer this question: Is it dangerous for the body or not? It’s found that while there have been incidents of intoxication from this material due to the usage of extremely high doses, it is not regarded a harmful or poisonous substance in general.