传统的热狗使用的是一种叫硝酸钠的人工合成的添加剂，而天然或有机型的热狗则是用香芹粉或香芹汁来为产品防腐。
Conventional hot dogs use sodium nitrite, the synthetic version of the additive, while natural and organic versions use celery powder or celery juice to preserve their product.
为了研究熊胆的防癌作用，进行了亚硝酸钠清除实验和对二甲基亚硝胺合成阻断实验。
To study the effects of bear bile on cancer prevention, the experiment of cleaning nitrite and blocking synthesis of dimethylnitrosamine in vitro was carried out.
四种天然植物成分清除亚硝酸钠和阻断亚硝胺合成的速度趋势各不相同。
The speed trend of cleaning nitrite and blocking synthesis of nitrosamine by four natural plant compositions were different each other.
方法：用比色法及紫外光解法测定了榛叶提取物对二甲基亚硝胺(N DMA)体外合成的阻断作用及对亚硝酸钠的清除作用。
Methods: Effect on NDMA and scavenging rate sodium nitrite was tested by colorimetric analysis and ultraviolet irradiation and decomposition.
方法：用比色法及紫外光解法测定了榛叶提取物对二甲基亚硝胺(N DMA)体外合成的阻断作用及对亚硝酸钠的清除作用。
Methods: Effect on NDMA and scavenging rate sodium nitrite was tested by colorimetric analysis and ultraviolet irradiation and decomposition.
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