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What's the REAL SPF of that sunscreen?
.... why it can differ from lab tests and for different sun elevation angles.
Jun 13
•
Richard McKenzie
1
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What's the REAL SPF of that sunscreen?
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When bad news is good news
Like a good joke, it's all in the timing ...
Jun 3
•
Richard McKenzie
1
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When bad news is good news
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Rule-of-thumb for UV blocking by clouds
They equivalent SPF is less than 5.
Jun 3
•
Richard McKenzie
3
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Rule-of-thumb for UV blocking by clouds
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2
May 2025
UV blocking by clothing
Just keep your shirt (and trousers) on
May 23
•
Richard McKenzie
3
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UV blocking by clothing
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9
Sunscreen heresy
Why are the SPFs of sunscreens so high these days? Is it a good thing?
May 13
•
Richard McKenzie
2
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Sunscreen heresy
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7
A guide to sunscreen use
How high, how much and how often?
May 2
•
Richard McKenzie
6
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A guide to sunscreen use
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2
April 2025
Scaling UV damage to human skin
... is 10 x 1 always the same as 1 x 10?
Apr 22
•
Richard McKenzie
2
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Scaling UV damage to human skin
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9
UV tRumped
More pressing problems to ponder ...
Apr 8
•
Richard McKenzie
2
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UV tRumped
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28
March 2025
A Brave new world for UV research (and more)
There won't be enough Indians, but at least there'll be fewer chiefs ...
Mar 27
•
Richard McKenzie
4
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A Brave new world for UV research (and more)
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2
A deepening data desert
It's now drying up in the air above us
Mar 18
•
Richard McKenzie
1
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A deepening data desert
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A roadmap to improving our woeful rates of skin cancer
Saving money as well as lives ...
Mar 11
•
Richard McKenzie
1
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A roadmap to improving our woeful rates of skin cancer
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6
February 2025
Glacial retreat (and UV risk)
Not quite a case of every cloud having a silver lining ...
Feb 28
•
Richard McKenzie
2
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Glacial retreat (and UV risk)
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