Hydroxyl ions are a significant kind of negative ion in the atmosphere and they’re known to be good because they react with and clean out pollutants like methane
https://en.wikipedia.org/wiki/Hydroxyl_radical
https://earthobservatory.nasa.gov/images/144358/detergent-li...
HA ⇌ H+ + A-
TIL that Hydroxyl ions bind to methane and thereby clean the air?
Air ioniser: https://en.wikipedia.org/wiki/Air_ioniser :
> A 2018 review found that negative air ions are highly effective in removing particulate matter from air. [6]
But the Ozone. Ozone sanitizes and freshens, but is bad for the lungs at high concentrations.
Ozone concentrations as low as 70ppb are hazardous when you're exposed to it for several hours [1]. Estimates for Ozone's olfactory threshold aren't trustworthy, since you go nose-blind to it pretty quickly [2], but it seems like it's probably around 20-40ppb before olfactory fatigue sets in [3,4].
My takeaway is that Ozone generators for rooms/basements/etc are definitely a bad idea. The best-cited olfactory thresholds are all in the same order of magnitude as that 8-hour hazard threshold, and with nose-blindness being a significant factor, you just don't want to mess around with that.
Inside a fridge, though? As long as you don't actually smell any ozone when you open the fridge, and you don't just shove your head in the fridge for hours on end, I'd think you're probably fine.
[1]: https://ozonewatch.gsfc.nasa.gov/facts/SH.html [2]: https://www.ecfr.gov/current/title-21/chapter-I/subchapter-H... [3]: https://www.cabidigitallibrary.org/doi/full/10.5555/19602703... [4]: https://spartanwatertreatment.com/ozone-safety/
https://jamanetwork.com/journals/jama/article-abstract/20579...
edit: I am fully aware that not washing leads to less oil build up over time, but I have tried and doctors have tried and that boat has sailed.
Also sex is a different thing from dating.
Also, the smell of sweat of someone attractive turns me on really hard.
> Babe I love it how you naturally smell
> That's great but I just bought a new generic cherry shampoo
some of us live in hot climates where a cold shower genuinely feels amazing and cools the body down.
some of us enjoy showering daily, because the bed sheets get less dirty that way, which means less laundry to do, and reduces my stress.
some of us are married to a lady and want a happy home life (lol).
a sample size of 1 (you) does not mean it’s true for everyone. Just saying. :)
Yes, that’s correct. You’ve cracked the code. People don’t want to smell you, that’s why we shower regularly.
I’d suspect there are other parts of your life where you could combine that keen perceptive wit with these revelations to perhaps elucidate other social mysteries and dilemmas you’ve faced.
Having said that, I absolutely love the moments when I'm talking to someone and the other person tells me something that is indeed valuable. That's why I do put effort into maintaining friendships with people who aren't NPCs.
> I want to be right
Ok, well, this is only right if you don't benefit from others not being viscerally disgusted by being near you. This is almost never actually the case for anyone. Social benefit is also a health benefit.
I'm wondering if you have its informed consent.
Related: This article shows an interesting study but it’s hard for me to interpret what does this translate to? I think we should minimize very complex and synthetic products to our bodies. Although sometimes it’s necessary when we harm our body (e.g. long sun bathing sessions)
>Enable JavaScript and cookies to continue
Turning on JS and doing the captchas just results in more captchas, forever, with no end. I have emailed science.org about this in the past but they only fixed it on the blogs, not the main site.
I guess maybe my CGNAT IP is reasonably well trusted and that's the difference?
(No problems with accessing this site without JS. You just need to make your client look like one of the officially-sanctioned browsers.)
This week I wanted to download some old HN front pages on the command lines and only got "403 sorry"
although I do not get that now
Zinc oxide and titanium dioxide are basically crushed rocks that absorb UV and are used in sunscreens.
“If we buy a sofa from major furniture company, it’s tested for harmful emissions before being put on sale. However, when we sit on the sofa, we naturally transform some of these emissions because of the oxidation field we generate,” said lead author Jonathan Williams, who heads the study of organic reactive species at the Max Planck Institute for Chemistry. “This can create many additional compounds in our breathing zone whose properties are not well known or studied. Interestingly, body lotion and perfume both seem to dampen down this effect.”
Which, if you're worried about the effects of unstudied compounds, lotion will help protect you against.
The science is definitely still out, but I don't think it's unreasonable to think that inhibiting this reaction might be beneficial.
“a fragrance-free body lotion containing linoleic acid (Neutral, Unilever body lotion for sensitive skin; 0% colorants and 0% perfume)”
Sounds like they blame the phenoxyethanol? Which serves a preservative kind of role?
They might not be perfect, of course, and they're always improving
https://taenk.dk/system/files/2022-01/Whats-that-smell-repor...
https://health.osu.edu/health/general-health/how-fragrances-...
We saw a clear correlation between richer consumers and a preference for subtler scents or even no scent.
This even applied across countries: third-world consumers liked aggressive floral scents, but in Northern Europe and North America, the scents are way less concentrated and tend to be more toward subtle alpine or linen.
All this was 15-20 years ago; today I notice that no soap in my house smells like anything at all.
Helan vetiver and rum, don't know if it's available in usa. Has a rum note as well as moss, I've definitely heard people around me saying it smells like forest, to me it's more of a mossy scent
Erbolario Periplo, but it's more Mediterranean bushes
Dsquared original wood
Maybe lalique encre Noire or encre Noire sport
I'd suggest to try them before buying them
It turns out a few of the customers douse their dollars with their personal scents to remind everyone who's spending money with them, and I suppose to see where it might be circulating.
It could also be because we’re using more products. If my face moisturizer and sunscreen had different scents, that would be unfortunate. It would limit my options to those that went together.
I don’t normally want my face to smell like anything (again, cologne) but if I did I would choose only one product that’s scented. Probably beard oil.
Same here, and all ja e store branded products certified allergy friendly.
That itself is a big change that took a while.
But really, I wouldn't worry about the result of this study _at all_ in daily life. It's quite surprising to me that this would be the top HN article at the time of this comment.
All that aside, it’s an interesting thing to think about but it’s not a basis for any kind of personal health recommendation and the authors state that. I have relevant expertise and this is a very complicated area that people routinely want to be boiled down into black and white simple advice. What this article seems to say is that lotion can affect the oxidation chemistry nearby it, but it’s not yet known if that is an effect with consequences that are on the whole negative or positive.
I would criticize the authors for their use of the word disrupt, because of the negative connotation carried by that word when talking about human biological systems. They use a softer, more neutral word, perturb, to express the same idea later in the article, which I think better expresses the idea without an emotional tinge to it.
Personal health recommendation: You'd be better off rubbing down with olive oil or sunflower oil than with that concoction, most likely. The ancient Greeks got some things right.
What evidence can you point to that supports this "most likely" assertion that isn't purely naturalistic fallacy?
> The ancient Greeks got some things right.
The pantheon of capricious gods living on mount olympus? Harvesting the sweat of wrestlers to use as treatment for genital warts?
The effects of ritual bathing (soap, scrubbing with washcloths, etc.) on the skin may also be "poorly understood". Many people also wear regularly-washed clothing.
When I look at the laundry-list of chemicals in personal-care products (soaps, shampoos) (and in foods ... sometimes, wow!) I often wonder how much effort goes into testing all of this gunk.
A lot of effort
> A lot of effort
Into testing the long-term biochemical and environmental consequences? lol no absolutely not. Source: I work in this field.
Globally, PCP usage is widespread
Skimmed the article at first, and this made me chuckle. I wonder if that was deliberate.
Which would be of no value.
There is no mechanism - no pathway - for ingested or applied "antioxidant" delivery into the cell where we believe we see oxidation or damage due to free radicals, etc.
... and even if there were it would probably have a terrible impact because it appears that the oxidation and free-radicals are an essential cell signaling mechanism which triggers apoptosis.
Which is a fancy way of saying: cells use these tools to kill themselves when they are performing badly. You would not want to interrupt this process.[1]
I am not a researcher, but I have a simple evolutionary theory that soap was invented in the last few thousand years and became a mass-market product after the beginning of industrialization.
If we survived and evolved without the use of something in the last few million years, then why is that thing needed?
flint•6h ago