Primary biodegradation experiment of 5 APGs with different chain lengths was carried out.
对5种不同碳链的APG初级生物降解性进行了研究。
At laboratory, the primary biodegradation of NP9EO in anaerobic or anoxic condition was done.
实验室里进行了聚合度为9的NP9EO在厌氧及缺氧条件下的生物降解实验。
The results show that hydrodynamic dispersion and indigenous biodegradation under mixed electron accepter conditions are primary mechanisms for the attenuation of ethanol and BTEX in porous media.
试验结果表明：水动力弥散和混合电子受体条件下的土著微生物降解是乙醇和单环芳香烃(BTEX)自然衰减的主要过程。
Reservoir temperature is the primary control on the degree of biodegradation but there is no simple liner relationship between them.
油藏温度是控制生物降解程度的重要因素，但降解程度与温度之间不是简单的线性关系。
No significant direct microbial or enzymatic attacking on PET could be observed up to now. The study of biodegradation of PET is still in the primary stage.
就现有的文献报道，表明国际上对PET的微生物或酶降解研究也属于刚刚起步。
On the basis of the origins of oil accumulations, the high-acidity oil can be divided into three types of primary-type, secondary biodegradation-type and mixed-type oils.
根据高酸值原油的成因，进一步划分出原生高酸值原油、次生生物降解型高酸值原油和混合型高酸值原油。
On the basis of the origins of oil accumulations, the high-acidity oil can be divided into three types of primary-type, secondary biodegradation-type and mixed-type oils.
根据高酸值原油的成因，进一步划分出原生高酸值原油、次生生物降解型高酸值原油和混合型高酸值原油。
应用推荐