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你有没有发现,超市里买的鸡蛋上都没有屎?到底是谁洗掉了鸡蛋上的屎?为什么你在超市上买的鸡蛋就没有屎呢?要回答这个问题,首先要从鸡下蛋的过程说起。鸡蛋最初只是卵巢中的一颗卵母细胞,随着蛋黄物质在周围沉积,9-10天后卵母细胞就变成了成熟的卵黄,卵黄到达输卵管后,继续向前,边走边形成蛋白和蛋壳膜。鸡蛋到了子宫,钙质沉积完成,就有了蛋壳,从卵黄到一颗完整的蛋,大约要花24小时。图片来源
视觉中国、GettyImages、Wikipedia、NYtimes.
视频来源
1.A small footprint made smaller - Australian Eggs
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12.Cage Free Egg Production Systems for hens /Free Range Egg Farm - TEXHA Poultry Equipment Production
13.Vencomatic Group: Vencobelt - Vencomatic Group
14.Egg farmer support for the Sustainability Framework - Australian Eggs
15.Madelaine's amazing egg cleaning machine! - Hollyburton Farm
16.POACHED EGGS | how to poach an egg (perfectly) – Downshift ology
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18.The One Of Kind Egg Factory Chain | Cheddar Gadgets - Cheddar Gadgets
19.EGGS | How It's Made - Discovery UK
20.You've Been Storing Eggs Wrong Your Entire Life - Mashed
参考文献
1.Yamamoto, T., Juneja, L., Hatta, H. and Kim, M., 2018. Hen Eggs:Basic And Applied Science. Boca Raton: Chapman and Hall/CRC.
2.Wide Open Pets. 2018. Everything You Need To Know About How A Chicken Lays Eggs.
3.吕远蓉, 2011. 饲料生产与应用. 西南交通大学出版社.
4.Clerici, F., Casiraghi, E., Hidalgo, A., Rossi, M. (2006). Evaluation of eggshell quality characteristics in relation to the housing system of laying hens.
5.中国农村网. 2020. 一枚鸡蛋的“科技之旅”.
6.Department of Primary Industries, 2015. Egg Cleaning Procedures.
7.United States Department of Agriculture, n.d. Shell Egg Grades And Standards | Agricultural Marketing Service.
8.中国商务部, 2011. 中华人民共和国国内行业贸易标准-鲜鸡蛋、鲜鸭蛋分级.
9.中国农业部, 2009. 鲜蛋等级规格.
10.De Reu K, e., 2006. The Effect Of A Commercial UV Disinfection System On The Bacterial Load Of Shell Eggs.
11.Food And Agriculture Organization of The United Nations, 2003. Egg Marketing - A Guide For The Production And Sale Of Eggs.
12.中国营养学会, 2016. 《中国居民膳食指南》.
13.Mughini-Gras, L., Schaapveld, M., Kramers, J., Mooij, S., Neefjes-Borst, E. A., Pelt, W. V., Neefjes, J. (2018). Increased colon cancer risk after severe Salmonella infection. PloS one, 13(1), e0189721.
14.Khan, Samiullah Chousalkar, Kapil Roberts, J.R. Sexton, M May, D Kiermeier, A. (2013). Effects of egg shell quality and washing on Salmonella Infantis penetration. International journal of food microbiology.
15.U.S. Food and Drug Administration, 2018. What You Need To Know About Egg Safety.
背景音乐
Hopscotch - Philip Guyler John Stax
Happy Bones - Paul Mottram
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