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Food preservation involves treating and handling food with the idea to greatly slow or stop spoilage that caused or accelerated by micro-organisms. Preservation normally involves preventing the development of fungi, bacteria along with other micro-organisms, along with the oxidation of fats which the cause rancidity. However, many ways of preservation actually use benign fungi, yeasts or bacteria to preserve food and add specific qualities, by way of example wines or cheeses. It may also include processes which inhibit aging and discoloration that occur during cooking, much like the enzymatic browning (oxidation) in apples when they are cut. Some food has to be sealed after treatment to avoid recontamination with microbes while others, including drying, mean food can be stored without special containment. There are many methods of preserving food including freezing, freeze drying, spray drying, food irradiation, sugar crystallization, adding preservatives, preserving in syrup, canning an d vacuum-packing. Shark! Shark! is surely an adult party games that's exciting. Divide your attendees into couples. Give each couple a really large sheet of craft or butcher's paper; four feet square is successful. It does not matter if different couple's sheets overlap initially. Tell the pairs that they are with a small boat in the ocean with sharks throughout them. Little by little the sharks are biting over outside the raft. In order to stay alive they must stay on the raft (their sheet of paper). The couple starts standing on the whole piece of paper, and therefore the games leader folds everyone's paper in half, then in fourth and so forth. The couple has to stand closer and closer since the paper raft gets smaller and smaller. The first couple to belong to the river by stumbling off of the raft has run out of the game (since they just got eaten from the sharks!). The last couple standing on the paper wins. They will have to become ?.extremely close together to deal with this. Particulate air pollution is really a combination of solid and liquid particles which are suspended up which you breathe. It is best to classify air particles through the aerodynamic properties since these properties determine removing them through the air, and where they deposit in your the respiratory system.