MODULE 2 REV STS Flashcards
What is Nanotechnology?
Convergence of science, technology and engineering.
scale of nanotechnology
less than 100 nanometers
1 nanometer equals
10 negative nine squared
how small is nano-small?
one nanometer is one-billionth of a meter
how to view Nanomaterials
light microscope, scanning electron microscope , transmission electron microsscope
Nanotechnology is already making today’s products
Lighter,stronger, faster, smaller , more durable
Carbon nanotubes (CNTs)
4nm smaller than DNA
100 time stronger
Top down approach
Bulk materials are broken down intro smaller and smaller particles
Bottom-up approach
Nanoparticles are built up an atom/molecule
Indium tin Oxide (ITO)
CRTS, Photographic films , Touch screens
Magnetic recording tapes
Audiocassettes, Videocassettes, Data storage tapes, floppy disks , hard disks
Sunscreen
UVB exposure, UVA exposure
Nanoplex biomarker detection
Silicia - coated Surface Enhanced Raman Scattering (SERS)
Photocatalysis
nanocrystals/films
propellants
nanoscale AI powder have higher burn rates
drug delivery and disease treatment
Potential to revolutionize cancer treatment
What is Biodiversity?
Variability in life forms within and between species in an ecosystem
Main types of Biodiversity
Species
Genetic
Ecosystem
Ecosystem Biodiversity
Tropical rainforest
Arctic Tundra
Desert
Species Biodiversity
Variety of species in a particular area, 1.7 million species
Genetic Biodiversity
Variety of genes among individuals of the same species
example dog
Amazon Rainforest
complex ecosystems , huge mix of species
Variation of biodiversity
Biodiversity place to place
Higher biodiversity equatorial region
Polar region have low biodiversity
Threats to biodiversity
Climate change
Land use changes
Pollution
Resources exploitation
Exotic Species
Genes
Carried on a chromosome
Heridity
DNA - RNA - proteins
