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  1. 2019New_Mesh_Tree_Hierarchy.txt 
    https://www.nlm.nih.gov/.../download/2019New_Mesh_Tree_Hierarchy.txt
    ... 578.725.500.800 Talc D01.578.750 Silicon Dioxide D01.578.750.300 Diatomaceous Earth D01.578. ... 550.750.950 Tetraoxanes D01.650.550.825 Silicon Dioxide D01.650.550.825.400 Diatomaceous Earth D01. ...
  2. pdf2017MeshTreesWithChangesShown.pdf 
    https://www.nlm.nih.gov/.../2017MeshTreesWithChangesShown.pdf
    ... Serpentine Magnesium Silicates Asbestos, Amosite Asbestos, Serpentine Talc Silicon Dioxide Diatomaceous Earth Quartz Nitrogen Compounds Ammonia Ammonium Compounds ...
  3. pdf2016MeshTree.pdf 
    https://www.nlm.nih.gov/mesh/2016/download/2016MeshTree.pdf
    ... 578.725.500.800...........................................Talc D01.578.750...........................................Silicon Dioxide D01.578.750.300...........................................Diatomaceous Earth D01.578. ...
  4. Emergency Preparedness and Response: Resources - Glossary 
    https://www.nlm.nih.gov/hmd/preservation/glossary.html
    ... from collection items using hydroscopic materials such as silica gel or molecular sieves. -Diverter: Large canopy or ... artwork . -Glass: A substance, made of about 75% silica, that tends to be a transparent solid. It ...
  5. pdfNLM Technical Bulletin, no.201-212 
    https://www.nlm.nih.gov/.../nlmarchives/techbull/201-212-1986.pdf
    ... Rain or Ozone ASBESTOS Asbestos or Asbestosis or Silica or Silicosis or Brown and Lung or Black ...
  6. Emergency Preparedness and Response: Collection Recovery Methods: Metals 
    https://www.nlm.nih.gov/hmd/preservation/metalsglass.html
    ... re-house objects with a desiccant (e.g. silica gel), if available. Freezing Procedures Do not freeze ...
  7. Emergency Preparedness and Response: Collection Recovery Methods: Wet Natural History Collections 
    https://www.nlm.nih.gov/hmd/preservation/wetnatural.html
    ... storage trays is preferred. Use desiccant (e.g. silica gel) when drying large quantities. If mold is ...