紫外线-C辐射对具有不同表面结构的材料上的微生物无活化的有效性
Rafał L Górny1, Małgorzata Gołofit-Szymczak1, Andrzej Pawlak1
1Central Institute for Labour Protection - National Research Institute (CIOP-PIB), Warsaw, Poland.
Annals of agricultural and environmental medicine : AAEM
|June 28, 2024
概括
紫外线C (UV-C) 光有效地使各种表面上的微生物失活. 紫外线发射二极管 (LED) 比灯更有效,但随着距离UV-C源的距离的增加,效率下降.
科学领域:
- 微生物学 微生物学
- 环境科学 环境科学
- 公共卫生 公共卫生
背景情况:
- 紫外线C (UV-C) 辐射是一种已知的杀菌剂,用于绝育.
- 有效的消毒对于防止微生物在各种环境中传播至关重要.
- 了解不同表面的紫外线功效对于公共卫生和设备卫生至关重要.
研究的目的:
- 为了评估UV-C消毒装置在各种表面纹理上的微生物的有效性.
- 为了比较来自灯的UV-C光与发光二极管 (LED) 的杀菌性能.
- 评估距离UV-C源对微生物无活化的影响.
主要方法:
- 五种类型的微生物 (细菌,病毒,真菌) 被注射到金属,塑料和玻璃表面,具有光滑和粗的纹理.
- 在20分钟的时间里,样品被暴露在距离0.5米,1米和1.5米的灯和LED的UV-C辐射中.
- 辐射后确定了微生物生存率,以评估消毒的有效性.
主要成果:
- 这两种UV-C来源都在无活化微生物方面表现出有效性.
- 与灯相比,UV-C发射二极管 (LED) 的效率更高.
- 微生物的存活率与UV-C剂量成反比例,在较近距离 (0.5m) 存活率较高,在较远距离 (1.5m) 存活率较低.
结论:
- 紫外线-C辐射是一种可行的消毒方法,LED可提供卓越的性能.
- 表面材料 (玻璃和塑料显示更高的生存率) 和UV-C剂量 (取决于距离) 显著影响消毒结果.
- 这些发现对于优化材料类型和微生物污染的环境中的卫生协议至关重要.
相关概念视频
Methods of Sterilization I: Physical Methods
19.7K
As used in a healthcare facility, sterilization destroys all microorganisms through physical or chemical methods. The physical method includes steam, dry heat, boiling water, and radiation.
Steam sterilization uses non-toxic, low-cost moist heat in the form of saturated steam under pressure, which is fast, microbicidal, and sporicidal, and quickly warms and penetrates fabrics. Autoclaves, or steam sterilizers, expose each item to direct steam contact for a predetermined time at the necessary...
Steam sterilization uses non-toxic, low-cost moist heat in the form of saturated steam under pressure, which is fast, microbicidal, and sporicidal, and quickly warms and penetrates fabrics. Autoclaves, or steam sterilizers, expose each item to direct steam contact for a predetermined time at the necessary...
19.7K
Ultraviolet and Visible (UV–Vis) Spectroscopy: Overview
2.6K
Ultraviolet–visible (UV–visible or UV–Vis) spectroscopy is an analytical technique that investigates the interaction between matter and UV–Vis light within the electromagnetic spectrum. This method is widely used for its versatility, simplicity, and relatively quick data acquisition, making it valuable for both qualitative and quantitative analysis. When UV–Vis radiation passes through a material, molecules absorb light depending on the energy required for...
2.6K
Methods of Sterilization II: Chemical Methods
6.3K
In healthcare, the chemical method of sterilization uses chemical sterilants to treat surgical instruments and medical supplies to help prevent the transmission of infectious pathogens to patients. Due to heat sensitivity, most medical supplies and equipment should not be exposed to high temperatures. These parts include rubber, plastic, glass, and other similar elements.
Using chemical sterilization rather than heat to clean out equipment is recommended. It eradicates and removes all bacteria,...
Using chemical sterilization rather than heat to clean out equipment is recommended. It eradicates and removes all bacteria,...
6.3K
Cleaning, Sterilization, and Disinfection
6.7K
Cleaning, disinfection, and sterilization are the methods that help to break the infection chain and prevent disease.
Cleaning
The cleaning process usually involves using water with detergents or enzymatic cleaner and removing foreign material from objects and surfaces, including organic material such as body fluids or inorganic material like soil. Cleaning is performed before high-level disinfection and sterilization because foreign materials on the cover of the devices interfere with process...
Cleaning
The cleaning process usually involves using water with detergents or enzymatic cleaner and removing foreign material from objects and surfaces, including organic material such as body fluids or inorganic material like soil. Cleaning is performed before high-level disinfection and sterilization because foreign materials on the cover of the devices interfere with process...
6.7K
UV–Vis Spectrometers
1.3K
The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell.
1.3K
Mutations
36.3K
Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
36.3K


