转移到奶牛牛奶:一个修订后的生物动力学模型
Brit Salbu1, Juan C Mora2, Jordi Vives I Batlle3
1Norwegian University of Life Sciences, Centre of Excellence for Environmental Radioactivity (CERAD CoE), Faculty of Environmental Sciences and Natural Resource Management, P.O. Box 5003, Ås 1432, Norway.
乳牛中的新生物动力学模型显示,菜蛋糕饮食减少了的保留和牛奶的转移. 这突显了牛和人类因原性物质而存在的潜在缺乏风险.
科学领域:
- 动物科学动物科学
- 环境科学 环境科学
- 生物动力学 生物动力学
背景情况:
- 奶牛的代谢对于动物健康和食品安全至关重要.
- 现有的生物动力学模型往往忽略了诸如唾液和甲状腺等关键部分.
- 料中含有的质性物质,如菜蛋糕,可以显著影响代谢.
研究的目的:
- 开发和验证乳牛中的新生物动力学模型.
- 为了研究油菜蛋糕对大豆粉对代谢的影响.
- 确定导致模型不确定性的因素,并评估对缺乏和放射性转移的影响.
主要方法:
- 一个4x4的因数养实验,用经过反切割的奶牛.
- 放射性 (131I) 的静脉和内注射.
- 开发一种新的生物动力学模型,包括唾液和甲状腺区,适应实验数据.
主要成果:
- 与大豆食相比,菜蛋糕饮食导致I保留率降低,牛奶转移减少,尿液分泌量增加.
- 这种新模型与实验数据相匹配.
- 敏感性分析表明,牛奶,血液和肝脏的途径是模型不确定性的主要贡献者.
结论:
- 开发的生物动力学模型准确地描述了奶牛的代谢.
- 菜蛋糕的消费可以增加缺乏症的风险,因为的保留率较低.
- 该模型可以为优化牛奶和减轻乳制品中放射性污染的战略提供信息.
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