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In mechanised harvesting, processing may also begin as part of the actual harvest process, with initial cleaning and sorting performed by the harvesting machinery. Initial post-harvest storage conditions are critical to maintaining quality. Each crop has an optimum range of storage temperature and humidity.
Preserving fruit by turning it into jam, for example, involves boiling (to reduce the fruit's moisture content and to kill bacteria, etc.), sugaring (to prevent their re-growth) and sealing within an airtight jar (to prevent recontamination). Different food preservation methods have different impacts on the quality of the food and food systems.
Post-harvest losses of vegetables and fruits occur at all points in the value chain from production in the field to the food being placed on a plate for consumption. Post-harvest activities include harvesting , handling, storage , processing , packaging , transportation and marketing .
Curing is a technique for preservation of (usually edible) vegetable material. It involves storing the material in a prescribed condition immediately after harvest. It involves storing the material in a prescribed condition immediately after harvest.
Post-harvest losses occur between harvest and the moment of human consumption. They include on-farm losses, such as when grain is threshed , winnowed , and dried. Other on-farm losses include inadequate harvesting time, climatic conditions, practices applied at harvest and handling, and challenges in marketing produce.
Additionally, the hurdle effect of food preservation, such as by adding lactic acid bacteria and salt to a food product, is illustrated and described. [ 11 ] [ 12 ] [ 13 ] This figure illustrates the pathway of food preservation followed by lactic acid bacteria involving nisin , as well as the pathway of food preservation followed by salt.
Following Dr. Esselen's tenure, Frederick Jack Francis became the head of the Department of Food Science. Dr. Francis had an array of research interests including food pigments and colorimetry, thermal processing, post-harvest physiology of fruits and vegetables and technical methods for increasing the food supply. Francis was a passionate ...
A paper-lined kangina, opened to access the grapes stored inside Closed kangina. Kangina [a] (Dari: کنگینه, lit. 'treasure', Dari pronunciation: [kʌn'ɡiːnɜ]) [1] [2] is the traditional Afghan technique of preserving fresh fruit, particularly grapes, in airtight discs (also called kangina) formed from mud and straw.