【抗菌剂】

B

A

Introduced by adjusting the reaction temperature, reaction time, antimicrobial agents silver and zinc ion content of antimicrobial silver zinc zeolite stability and anti-tarnish resistance, and its anti-tarnish properties and antibacterial properties were tested and analyzed. Silver zinc zeolite obtained the best preparation for the use of environment 0.1mol / L of the AgNO3 solution and 2mol / L of ZnSO4 solution was mixed in the mixing pot 70 ℃ water bath for 3 hours. This article also inhibitory rate by inhibition zone and the best experimental conditions for preparation of silver zinc coated zeolite antibacterial antibacterial agents antibacterial properties of wrapping paper and physical properties were determined and research. The results showed that the reduction of silver zeolite antimicrobial agent in the zinc content of silver ions to increase the zinc content of the antimicrobial properties of antimicrobial little change in the sample, and anti-tarnish performance there is much improvement.
Prepared using the method of antimicrobial silver zinc zeolite stability is good, dark storage time is longer, better bactericidal properties, excellent resistance to discoloration, silver zeolite is an ideal substitute.
Key words: antibacterial materials; containing silver-zinc zeolite; inhibition zone test; Antibacterial Pape

解题思路：A、三氯生中不含有氧分子，它是一种纯净物；
B、三氯生由碳、氢、氧、氯四种元素组成的；
C、三氯生中含有碳元素，属于有机物；
D、每个三氯生分子中含有24个原子．

A、三氯生分子中含有氧原子，不含有氧分子．故选项错误；
B、三氯生由碳、氢、氧、氯四种元素组成．说法正确；
C、三氯生中含有碳元素，属于有机物；说法正确；
D、每个三氯生分子中含有24个原子．说法正确；．
故选A．

点评：
本题考点： 分子、原子、离子、元素与物质之间的关系；有机物与无机物的区别；化学式的书写及意义；有关化学式的计算和推断．

考点点评： 本题主要考查化学式的含义，解答时要注意理解宏观组成和微观构成的区别．

This topic to Nisin,(Nisin) as the agent that fight bacterium Nisin antimicrobial coating film and preparation of Florida modified atmosphere packaging,Nisin antimicrobial coating film research fruit modified atmosphere packaging of the feasibility and superiority.Will the preparation of qualified Nisin antibacterial coating film packaging of strawberry,and the establishment of ordinary PE film to strawberry packing and packaging of strawberry as no deal with the control,in room temperature environment conditions storage,preservation of strawberry every 24 hours each index method.Comprehensive analysis of experimental results:Nisin antimicrobial coating of modified atmosphere packaging strawberry thin store process has antibacterial,reduce the strawberry breathing effect,prolong the strawberry last period.In the strawberry effective during the last period,the antimicrobial coating film packaging Nisin strawberry decay rate up to 30%,weightlessness rate was 12%,the respiration intensity for 53 mg/kg,h,no packaging processing in the control group,than the decay rate of strawberry and weightlessness rate was reduced by 40% and 23%,respectively,at the same time,to a certain extent of strawberry was reduced respiration,reduce respiration to strawberry accumulated inside body of the consumption of nutrients,will be the last period extended to effective strawberry 4 days,compared with controls extended the two to three days.This topic for Nisin antimicrobial coating film modified atmosphere packaging fruit in the practical application of the feasibility and superiority provides experiment basis.