在纳米级化学模板上对定向病毒组合进行物理控制
Chin Li Cheung1, Sung-Wook Chung, Anju Chatterji
1Chemistry and Materials Science Directorate, Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94551, USA.
Journal of the American Chemical Society
|August 17, 2006
概括
研究人员使用现场强迫显微镜研究工程病毒如何组装成纳米级结构. 他们发现1D模板指导病毒组织,类似于原子系统,但具有体热力学,揭示了关键的组装原理.
科学领域:
- 纳米技术纳米技术
- 生物物理学的生物物理.
- 材料科学 材料科学 材料科学
背景情况:
- 病毒有潜力作为纳米级异构结构的构建块.
- 了解病毒定向组装的物理原理是有限的.
研究的目的:
- 在纳米级化学模板上研究工程 Cowpea 马赛克病毒 (CMV) 的组织和组装动力学.
- 阐明控制病毒自我组装在狭窄几何结构中的物理原理.
主要方法:
- 利用现场强力显微镜观察病毒组织.
- 工程化牛马赛克病毒用于特定的,可逆的结合到30nm以下的化学模板.
- 多样化的病毒流和病毒间潜力,以研究形态演变和组装动力学.
主要成果:
- 观察到的形态类似于原子尺度的表轴系统,热力学类似于局限的体系统.
- 证明1D模板直接引导初始集群形成,影响粘合概率,并促进1D/2D凝聚在临界体积分数以下.
- 确定了一种通过病毒缓慢扩散控制的t(1/2) 增长规律.
- 展示了诱导病毒群的横向扩张的聚乙烯糖醇 (PEG),突出了弱相互作用的作用.
结论:
- 1D纳米尺度模板可以有效指导病毒组装,克服低病毒度的局限性.
- 病毒组合表现出原子尺度表层和体系统在限制中的特征.
- 弱相互作用,例如涉及PEG的弱相互作用,在病毒集群形态和扩张中起着重要作用.
相关概念视频
Methods for Controlling Microbial Growth
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...
Physical Methods for Controlling Microbial Growth: Temperature
Heat is a widely used method to control microbial growth by targeting and denaturing cellular proteins, thereby killing or inactivating microbes. This method's effectiveness is quantified using parameters such as the thermal death point (TDP), thermal death time (TDT), and decimal reduction time (D value). TDP represents the lowest temperature at which all microorganisms in a liquid suspension are eliminated within 10 minutes, whereas TDT is the time necessary to achieve sterilization at a...
Physical Methods for Controlling Microbial Growth: Radiation and Filtration
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.
Chemical Agents for Microbial Control
Chemicals play important roles in controlling microbial growth by targeting microbial structures and functions as sanitizers, antiseptics, disinfectants, and sterilants.Alcohols are commonly used sanitizers, effectively disrupting lipid membranes, which compromises cell integrity. They are also used as antiseptics and disinfectants due to their rapid action and versatility.Phenols and their derivatives phenolics , known for denaturing proteins and disrupting cell membranes, are particularly...
Biological Methods for Microbial Control
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...


