https://padlet.com/james09/fhn8hpgw3cfb en-us 2017-04-17 18:27:52 UTC 2017-04-17 18:48:07 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Alarmclock.png james09 https://padlet.com/james09/fhn8hpgw3cfb/wish/166609699 The term food preservation refers to any one of a number of techniques used to prevent food from spoiling. It includes methods such as canning, pickling, drying and freeze-drying, irradiation, pasteurization , smoking, and the addition of chemical additives.  Food spoilage can be defined as a disagreeable change in a food's normal state. Such changes can be detected by smell, taste, touch, or sight. These changes are due to a number of reasons -- air and oxygen, moisture, light, microbial growth, and temperature.]]> 2017-04-17 18:33:22 UTC https://padlet.com/james09/fhn8hpgw3cfb/wish/166609699