By Sunil Bhardwaj

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Bulkier particles of zinc oxide and titanium dioxide have been used in sunscreens for decades to reflect or absorb cancer-causing ultraviolet light. The reason traditional sunscreens look white when you rub them onto your skin is because particles of this size reflect visible light. But when these sunscreen ingredients are manufactured into nanoparticles - usually 25 to 50 nanometres wide – they behave differently.

Despite clumping together when mixed into sunscreen, nanoparticles of titanium dioxide and zinc oxide not only retain their highly effective UV light-absorbing capacity, but also absorb and scatter visible light, rendering them transparent on the skin. And in comparison to other UV filters, they are more stable – requiring less reapplication – and are low irritant and low allergen materials.

So in the fight against skin cancer, nanoparticle formulations are onto a winner. You are more likely to slather yourself in it, better protecting your skin from sun damage.

MCQ on Nanomaterials from Engineering Chemistry
Prof. Gianfranco Coletti

Shared publicly - 2019-08-23 00:00:00

Don’t want your columns to simply stack in some grid tiers? Use a combination of different classes for each tier as needed. See the example below for a better idea of how it all works.

Prof. Maheshwar Sharon

Shared publicly - 2019-08-24 00:00:00

For grids that are the same from the smallest of devices to the largest, use the .col and .col-* classes. Specify a numbered class when you need a particularly sized column; otherwise, feel free to stick to

sunil

Shared publicly - 2023-02-28 11:09:52

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Shared publicly - 2023-02-28 10:48:10

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