目的评价冷常压等离子体(cold atmospheric plasma,CAP)对牙龈卟啉单胞菌(Porphyromonas gingivalis,P.g)的抗菌作用并观察其对P.g超微结构的影响。方法用CAP对接种在钛片表面的P.g进行处理,依据处理距离和处理时间将实验组分为5 mm 30 ...目的评价冷常压等离子体(cold atmospheric plasma,CAP)对牙龈卟啉单胞菌(Porphyromonas gingivalis,P.g)的抗菌作用并观察其对P.g超微结构的影响。方法用CAP对接种在钛片表面的P.g进行处理,依据处理距离和处理时间将实验组分为5 mm 30 s组、5 mm 60 s组、9 mm 30 s组和9 mm 60 s组,对照组不进行CAP处理。通过平板菌落计数法观察各组P.g数量的变化,场发射扫描电子显微镜(SEM)观察各组钛片表面P.g的形态和分布,并通过透射电镜(TEM)观察处理前后P.g超微结构的变化。结果 CAP处理时间和处理距离对各组菌落数均有显著影响,且各实验组菌落数与对照组相比,差异均有统计学意义(均P <0.05)。SEM观察可见,随着CAP处理时间和距离的变化,菌体受到不同程度的破坏;5 mm 60 s组和9 mm 60 s组细菌溶解、破碎,几乎观察不到完整的细菌形态;对照组仍为完整的短杆状菌体结构。TEM观察可见,通过CAP处理,P.g细胞膜断裂、模糊不清,细胞质外溢,可观察到扭曲和完全分离的膜结构;对照组P.g菌体超微结构未发生明显改变,细胞壁、细胞膜及细胞质结构清晰。结论 CAP对P.g有较好的杀灭作用,并可引起P.g超微结构的变化,在一定范围内增加处理时间、缩减处理距离有助于增强抗菌效果。展开更多
Innovation journey of P&G laundry product in China has been reviewed.Developing product that can improve the life of consumers is the key for P&G to grow in China.Examples on innovations in Tide,Ariel and Down...Innovation journey of P&G laundry product in China has been reviewed.Developing product that can improve the life of consumers is the key for P&G to grow in China.Examples on innovations in Tide,Ariel and Downy have been shared.With increasing multi-dimensional consumer need,the industry association,manufactures and government need to work together to develop standards and ensure high quality and sustainable growth of the industry.展开更多
文摘目的评价冷常压等离子体(cold atmospheric plasma,CAP)对牙龈卟啉单胞菌(Porphyromonas gingivalis,P.g)的抗菌作用并观察其对P.g超微结构的影响。方法用CAP对接种在钛片表面的P.g进行处理,依据处理距离和处理时间将实验组分为5 mm 30 s组、5 mm 60 s组、9 mm 30 s组和9 mm 60 s组,对照组不进行CAP处理。通过平板菌落计数法观察各组P.g数量的变化,场发射扫描电子显微镜(SEM)观察各组钛片表面P.g的形态和分布,并通过透射电镜(TEM)观察处理前后P.g超微结构的变化。结果 CAP处理时间和处理距离对各组菌落数均有显著影响,且各实验组菌落数与对照组相比,差异均有统计学意义(均P <0.05)。SEM观察可见,随着CAP处理时间和距离的变化,菌体受到不同程度的破坏;5 mm 60 s组和9 mm 60 s组细菌溶解、破碎,几乎观察不到完整的细菌形态;对照组仍为完整的短杆状菌体结构。TEM观察可见,通过CAP处理,P.g细胞膜断裂、模糊不清,细胞质外溢,可观察到扭曲和完全分离的膜结构;对照组P.g菌体超微结构未发生明显改变,细胞壁、细胞膜及细胞质结构清晰。结论 CAP对P.g有较好的杀灭作用,并可引起P.g超微结构的变化,在一定范围内增加处理时间、缩减处理距离有助于增强抗菌效果。
文摘Innovation journey of P&G laundry product in China has been reviewed.Developing product that can improve the life of consumers is the key for P&G to grow in China.Examples on innovations in Tide,Ariel and Downy have been shared.With increasing multi-dimensional consumer need,the industry association,manufactures and government need to work together to develop standards and ensure high quality and sustainable growth of the industry.
