循环风空气消毒机在门诊采血室中的空气消毒效果

目的探讨循环风空气消毒机在门诊采血室中的空气消毒效果.方法选取2022年6月我院的某个门诊采血室,分别给予循环风空气消毒机消毒和紫外线灯消毒,对比两种消毒方法的效果.结果工作4h、6h后,循环风空气消毒机消毒效果明显优于紫外线灯(P<0.05).循环风空气消毒机静止状态消毒后的空气平均菌落数比紫外线灯少(P<0.05).消毒1h后,紫外线灯在物体表面的消毒效果合格率为93.3%,比循环风空气消毒机(100.0%)低(P<0.05).结论相较于紫外线灯消毒,循环风空气消毒机效果更佳,可以提高消毒合格率,降低空气中的平均菌落数,且可以持续应用,不会导致患者、医护人员损伤,值得推广应用.     

GCXD-1000型床单位消毒器消毒方法的应用

介绍了GCXD－1000型床位单位消毒器臭氧消毒方法，并用GCXD－1000型床位单位消毒器和紫外线灯对两间病房同时进行消毒对比。结果说明两种方法在物体表面消毒效果中无明显差异；在病房空气消毒中，前者略优于后者；在物体各面消毒效果中，前者明显胜于后者。结论：臭氧杀菌范围比紫外线更为广泛，更适用于病房消毒。     

医院感染与臭氧消毒的应用

目的为加深对医院感染工作重要性的认识,了解医院感染的现状和医院卧具微生物污染情况,对床单进行曝晒消毒、紫外线消毒、臭氧消毒的效果比较.结论臭氧气体穿透力强,具有广谱杀灭微生物的作用,床单位臭氧消毒器用于床单位内部和表面消毒效果均好.     

制药用水系统的消毒与灭菌方法

以消毒与灭菌的概念为切入点,围绕制药用水系统,介绍了巴氏消毒、紫外线杀菌、臭氧杀菌、纯蒸汽杀菌与过热水杀菌5种制药用水系统的消毒与灭菌技术。     

城市饮用水消毒技术的研究进展

综述了当前饮用水消毒技术的研究现状,包括臭氧、紫外线、氯化、二氧化氯、膜等,然后展望了消毒技术的发展方向,指出二氧化氯消毒和组合消毒工艺值得推广应用,同时应大力开发新的消毒技术和消毒剂。     

医药洁净厂房消毒灭菌方式的探讨及相关验证

着重介绍了紫外线消毒灭菌、甲醛熏蒸灭菌和臭氧消毒灭菌的特点,并对相应的灭菌效果进行了验证,以保证医药洁净厂房的灭菌效果。     

臭氧消毒闭环控制系统的实现

为了精确控制臭氧消毒浓度,保证在规定的浓度及作用时间下达到可控、准确、安全的消毒目的,现将闭环控制技术与消毒工艺相结合,通过空间臭氧浓度传感器把检测到的信号值反馈给PLC控制系统,对臭氧发生器进行自动控制调节,消毒过程实现自动化运行,消毒结果满足工艺需求,保证臭氧消毒浓度及作用时间的精确性。     

臭氧消毒流感疫苗生产用鸡胚表面方法研究

目的:建立臭氧消毒流感疫苗生产用鸡胚表面方法。方法:通过比较消毒前后鸡胚表面微生物限度,研究臭氧消毒浓度及时间,从而建立臭氧消毒鸡胚表面方法。结论:使用臭氧对鸡胚表面进行消毒的方法可行。     

洛阳铁路分局游泳馆水处理工艺设计探讨

本文结合工程设计，对游泳池传统臭氧消毒和直接臭氧消毒法理论进行了探讨，并对直接臭氧消毒法进行了较深入的分析研究。     

通风空调系统中紫外线辐射消毒的应用

通风空调中的空气过滤组合以及紫外线的消毒装置结合起来,发挥的作用是十分巨大的,在进行紫外线辐射消毒装置的安装上有一些注意事项,例如要注意安装在空气处理机组内的盘管的出口侧上等。本文对提高通风空调系统中紫外线辐射消毒能力以及技术应用展开了论述。     

用于医疗器械快速灭菌的低温等离子体装置研究

现有低温等离子体技术存在放电范围小、放电电压高等局限性,不适用于大尺寸医疗器械的消毒灭菌。 本文研制了一 种灭菌装置,在较低击穿电压下(大气压氦气 325 V,大气压空气 585 V)产生了大面积等离子体,且创新性地在印刷电路板上实 现了气体放电。 通过 COMSOL 等离子体仿真以及实际放电实验,同时实现了低气压与大气压环境下的均匀辉光放电,放电实 验结果表明:相对气压在-70~ -50 kPa 范围内,击穿电压值最低。 通过灭菌实验,验证了此灭菌装置产生等离子体的灭菌效 能,并对影响灭菌效果的因素进行了探究,灭菌实验结果表明:电源频率是影响灭菌效果的最关键因素,灭菌时间其次,氦气气 压对灭菌效果影响最小。 对于一定浓度的大肠杆菌,6 min 即可达到完全灭菌。     

Field and laboratory emission cell automation and control system for investigating surface chemistry reactions

A novel system [field and laboratory emission cell (FLEC) automation and control system] has been developed to deliver ozone to a surface utilizing the FLEC to simulate indoor surface chemistry. Ozone, humidity, and air flow rate to the surface were continuously monitored using an ultraviolet ozone monitor, humidity, and flow sensors. Data from these sensors were used as feedback for system control to maintain predetermined experimental parameters. The system was used to investigate the chemistry of ozone with alpha-terpineol on a vinyl surface over 72 h. Keeping all other experimental parameters the same, volatile organic compound emissions from the vinyl tile with alpha-terpineol were collected from both zero and 100 ppb (parts per 10(9)) ozone exposures. System stability profiles collected from sensor data indicated experimental parameters were maintained to within a few percent of initial settings. Ozone data from eight experiments at 100 ppb (over 339 h) provided a pooled standard deviation of 1.65 ppb and a 95% tolerance of 3.3 ppb. Humidity data from 17 experiments at 50% relative humidity (over 664 h) provided a pooled standard deviation of 1.38% and a 95% tolerance of 2.77%. Data of the flow rate of air flowing through the FLEC from 14 experiments at 300 ml/min (over 548 h) provided a pooled standard deviation of 3.02 ml/min and a 95% tolerance range of 6.03 ml/min. Initial experimental results yielded long term emissions of ozone/alpha-terpineol reaction products, suggesting that surface chemistry could play an important role in indoor environments.     

A comparative study of mechanical behavior of ABS material based on UVC sterilization for medical usage

This study aims to examine the mechanical properties of acrylonitrile butadiene styrene specimens using ASTM 638, 695, and 790. UVC radiation was also used as a sterilizing method. The fused deposition modeling of 3D-printed polymerize with 30% filling was used to manufacture 30 specimens for tensile, compression, and bending. Half of the specimens were treated with UVC, whereas the other half were not. The chosen dosage of 13.5 J/cm² with an exposure time of 48 min corresponds to 3650 sterilization treatments or 10 years of sterilization. The average ultimate stress in the tensile test, compression test, and bending test was 34.5 ± 7.4, 25.4 ± 0.5, and 24.5 ± 2.1 Mpa, respectively. The analysis of variance test shows that UVC radiation has a demonstrable influence on tensile specimens, with a P-value of 0.012, which is less than the significance threshold of 0.05. Thus, the null hypothesis is rejected.

     

基于灭菌效果监测的真空压力蒸汽灭菌器最优参数选取方法

为提升真空压力蒸汽灭菌器灭菌效果,提出基于灭菌效果监测的真空压力蒸汽灭菌器最优参数选取方法。该方法使用温度压力测定仪、敷料型PCD灭菌包、恒温培养箱等设备,利用不同循环方式通过调整压力变化速率在合格条件与不合格条件下,从不同脉动深度、真空速率、密封时间、脉动正压值和脉动真空值等方面检测空压力蒸汽灭菌器灭菌效果,从检测结果中选取真空压力蒸汽灭菌器最优参数。实验结果表明:真空压力蒸汽灭菌器温度、时间参数分别为130℃、2.8min条件下,抽空深度分别为5kpa、20kpa时,最优脉冲次数分别为5次、10次;密封时间为400min时,脉动正压值和脉动真空值最优参数为-0.095mpa和0.09mpa,此时灭菌合格率达到100%;循环方式分别为低大气压、高大气压时,空气注入量最优参数分别为300 mL和400 mL。     

Disinfection and surface changes of gutta‐percha cones after immersion in sodium hypochlorite solution containing surfactant

In this study, we evaluated the effectiveness of 1 and 5.25% NaOCl solutions, with or without surfactant, in disinfecting gutta‐percha cones. Surface changes of the gutta‐percha cones after disinfection were also assessed under scanning electron microscopy (SEM). One‐hundred and eight gutta‐percha cones previously contaminated with Enterococcus faecalis were left in contact for 30 s or 1 min with the following solutions (n = 12): 1% NaOCl; 1% NaOCl + 2% cetrimide; 5.25% NaOCl; 5.25% NaOCl + 2% cetrimide. Positive control group was composed by the remaining contaminated cones (n = 12), and the negative control group by noncontaminated cones (n = 12). The cones were kept in Eppendorf tubes containing Trypticase Soy Broth at 37°C for 24 hr, and then, the presence of turbidity was analyzed. Ten additional cones (n = 2) were observed under SEM to evaluate surface changes after 1 min of disinfection. The data analysis (Kruskal–Wallis test, α = 5%) demonstrated that regardless the presence of surfactant, the NaOCl solutions used were effective in the disinfection when cones were immersed for 1 min. However, at the 30‐s period, only the 5.25% NaOCl solution was effective. SEM analysis demonstrated that NaOCl solutions promoted the formation of sodium chloride crystals on cones surface, less visible when the 1% NaOCl associated to surfactant was used. The addition of surfactant did not affect the disinfection capacity of NaOCl solutions. However, the surfactant has apparently inhibited the sodium chloride crystals deposition on the cones surface when associated to 1% NaOCl solution.     

浅析空调净化系统的日常维护

在查看国内外文献、读书和实践的基础上,对空调净化系统各个部分的清洁消毒和维护进行讨论,包括高、中、初效过滤器的清洁更换、管道的清洁、仪表的校验、阀门的检查以及整个系统的消毒灭菌等,着重阐述其清洁消毒和维护的重要性,期望能够得到企业的重视。     

基于光纤布拉格光栅的压力蒸汽灭菌器气体质量监测

基于光纤布拉格光栅(Fiber Bragg Grating,FBG)的灭菌全过程物理参数实时动态监测系统,提出基于聚酰亚胺涂覆的FBG(Polyimide-Coated FBG,PI-FBG)对灭菌器气体的质量进行监测,研究其可行性和监测方法.评估PI-FBG的温度稳定性及温度灵敏度,通过考查合格灭菌器排气期和干燥期传...     

自动空气杀菌消毒机设计与控制实现

通过对空气杀菌消毒方案的选择分析,设计一种能够实现对生活办公环境空气进行自动、往复、高效杀菌消毒的自动化仪器,并提出了具体的设计方案和自动控制电路的实现.