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相关概念视频

Methods of Sterilization II: Chemical Methods01:30

Methods of Sterilization II: Chemical Methods

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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,...
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Physical Methods for Controlling Microbial Growth: Radiation and Filtration01:26

Physical Methods for Controlling Microbial Growth: Radiation and Filtration

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Radiation and filtration are essential tools for microbial control, targeting microorganisms through distinct mechanisms. Radiation eliminates microbes by damaging their DNA, either killing them or inhibiting their growth. Based on wavelength, radiation is classified into two types: nonionizing and ionizing radiation.Non-ionizing radiation, such as UV radiation (200–400 nm), is absorbed by DNA, causing defects that effectively disinfect surfaces, air, and water, including safety cabinets.
218
Methods of Sterilization I: Physical Methods01:29

Methods of Sterilization I: Physical Methods

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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...
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Biological Methods for Microbial Control01:28

Biological Methods for Microbial Control

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Biological agents offer an effective means of controlling microbial growth by leveraging natural processes like predation, competition, and the secretion of antimicrobial substances.Predatory bacteria such as Bdellovibrio species target and kill pathogens like Salmonella and E. coli. They are widely used in poultry farms to control infections. Myxococcus species help combat plant-pathogenic fungi. These naturally occurring predators serve as eco-friendly alternatives to chemical pesticides and...
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Methods for Controlling Microbial Growth01:29

Methods for Controlling Microbial Growth

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Microbial growth control refers to various methods employed to inhibit, reduce, or eliminate microorganisms to ensure safety and hygiene across different settings. These methods are categorized based on the target environment and the level of microbial control required.Biocides are versatile agents designed to control microorganisms by either inhibiting their growth or outright killing them. These agents work through various physical, chemical, mechanical, or biological mechanisms. The...
486
Cleaning, Sterilization, and Disinfection01:30

Cleaning, Sterilization, and Disinfection

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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...
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Waste Water Derived Electroactive Microbial Biofilms: Growth, Maintenance, and Basic Characterization
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细菌驱动的生物电活性灭菌.

Mingming Qin1, Qiuping Qian1, Xiaoqing Gao1

  • 1Zhejiang Engineering Research Center for Tissue Repair Materials, Wenzhou Institute, University of Chinese Academy of Sciences Wenzhou 325001 P. R. China zhouyl@ucas.ac.cn qianqp@ucas.ac.cn.

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概括

这项研究引入了一种新的生物反应器,使用细菌减少的氧化石墨烯-铜生物混合体. 这种敏感的抗菌材料利用细菌的新陈代谢进行精确的灭菌,防止生物膜的形成和抗生素耐药性.

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科学领域:

  • 生物材料工程 生物材料工程
  • 抗菌材料科学 抗菌材料科学
  • 合成生物学 合成生物学

背景情况:

  • 过度使用抗生素需要开发新型响应良好的抗菌材料.
  • 目前的材料通常依赖于间接刺激 (pH,光,酶),使细菌代谢不足以用于有针对性的杀菌.
  • 开发具有内置抗微生物能力的自维持生物反应器是一个关键的挑战.

研究的目的:

  • 设计一种自给自足的生物反应器,利用细菌新陈代谢进行向的抗微生物活性.
  • 为了研究细菌减少的石墨烯氧化铜生物混合体 (BrGO-Cu) 在细菌自我消灭中的有效性.
  • 探索长期,无抗性抗微生物保护的潜力.

主要方法:

  • 制造细菌减少的氧化石墨烯-铜生物混合体 (BrGO-Cu).
  • 利用细菌细胞外电子转移 (BEET) 级联减少氧化石墨烯并将Cu2+转化为Cu+.
  • 评估杀菌活性,生物膜预防,细胞毒性和多通道的细菌耐药性.

主要成果:

  • BrGO-Cu生物反应器通过基 (̇OH) 产生,由细菌代谢触发,有效地杀死细菌.
  • 证明显著预防生物膜形成,可忽略的细胞毒性.
  • 在不诱导细菌耐药性的情况下,长达129个通道表现出持续的杀菌活性.

结论:

  • 开创了一个细菌细胞外电子转移 (BEET) 的重定向策略,用于响应性抗菌材料.
  • BrGO-Cu生物反应器通过代谢反循环提供病原体特异的长期抗微生物保护.
  • 这种方法为传统抗生素提供了一个有希望的替代品,可以缓解耐药性的发展.