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Related Concept Videos

Introduction to Virus01:28

Introduction to Virus

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Viruses are unique biological entities that blur the boundary between living and non-living systems. Although they lack cellular structure and metabolic processes, they can exhibit characteristics of life when infecting a host. Their defining feature is a nucleic acid core, composed of either DNA or RNA, encapsulated within a protein coat called a capsid. This simple structure allows them to invade host cells and use their machinery for replication efficiently.Viral Structure and...
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Viruses are extraordinarily diverse in shape and size, but they all have several structural features in common. All viruses have a core that contains a DNA- or RNA-based genome. The core is surrounded by a protective coat of proteins called the capsid. The capsid is composed of subunits called capsomeres. The capsid and genome-containing core are together known as the nucleocapsid.
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Subviral agents are infectious entities that resemble viruses but lack one or more viral components, such as a capsid or essential replication machinery. These agents include viroids, prions, and satellites, each possessing distinct structural and functional characteristics that influence their mode of infection and replication.Viroids are the simplest subviral agents, consisting of circular, single-stranded RNA molecules without a protein coat. They exclusively infect plants, relying entirely...
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Promising Nanostructured Materials against Enveloped Virus.

Gabriel G DE Toledo1, Victor H Toledo1, Alexandre J C Lanfredi2

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Developing self-disinfectant materials is crucial for infection control. Copper alloys, nanostructured semiconductors, and graphene oxide show promise in inactivating viruses on surfaces, aiding in the creation of protective devices.

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Area of Science:

  • Materials Science
  • Infectious Disease Control
  • Nanotechnology

Background:

  • Viral infections, including coronaviruses (SARS, MERS, COVID-19), pose significant global health threats.
  • Surface contamination is a major pathway for virus transmission.
  • Effective strategies are needed to prevent and control the spread of viruses via contaminated surfaces.

Purpose of the Study:

  • To review advanced materials with self-disinfectant properties.
  • To explore the potential of these materials in preventing viral infections.
  • To provide insights for developing new self-disinfectant devices.

Main Methods:

  • Review of existing literature on self-disinfectant materials.
  • Analysis of virucidal mechanisms of various materials, including copper alloys, nanostructured semiconductors (TiO2, Co3O4, CuO, NiO), and silver nanoparticles.
  • Investigation of graphene oxide's antiviral capabilities.
  • Consideration of enhancing virucidal properties through photosensitizer functionalization.

Main Results:

  • Copper alloys generate reactive species that rapidly eliminate viruses.
  • Nanostructured materials (semiconductors, silver nanoparticles) reduce virus viability on surfaces, especially with light exposure.
  • Graphene oxide effectively inactivates viruses by damaging their envelope and capsid.
  • Functionalization with photosensitizers can boost the virucidal efficacy of these materials.

Conclusions:

  • Advanced self-disinfectant materials offer a promising approach to combat viral infections.
  • These materials can be integrated into everyday devices like masks and gloves.
  • Further development in this area is essential for public health protection against viruses.