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  • dacarls commented on ericsnis's instructable Size Markings for Wrenches and Sockets2 months ago
    Size Markings for Wrenches and Sockets

    STUPID RONALD REAGAN. STUPID STUPID STUPID. We had this conversion to metric well underway, back when the USA had a machine tool industry. And a stupid cowboy actor ruined this industry forever and badly damaged America's impact on the world. The guy is dead now, and there was nothing constructive or positive about this one person's whim.

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  • dacarls commented on belsey's instructable Sun & bug lotion: one simple solution4 months ago
    Sun & bug lotion: one simple solution

    Research scientists determine actual chemical structures of mosquito repellents, then synthesize analogs (similar structures), then test them in legitimate bioassays against particular insects in controlled lab tests. This is called "discovery". And that is exactly what was done for DEET, ethylhexanediol, 6,12, and older repellents during World War II.. It was "discovery". Drugs are discovered the same way.

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  • dacarls commented on belsey's instructable Sun & bug lotion: one simple solution4 months ago
    Sun & bug lotion: one simple solution

    I was stating some scientific facts, not opinions. Scientific facts are sometimes at odds with opinion, but this does not change facts. Pregnant women and possibly pregnant women should protect themselves against mosquito bites. If people are out-of-doors and have been exposed to Aedes aegypti or Aedes albopictus mosquito bites there is a good chance they they are carrying the ZIka, dengue, orWest Nile virus. You or your loved one could get it. This is how epidemics occur. Do not allow this to happen.

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  • dacarls commented on belsey's instructable Sun & bug lotion: one simple solution4 months ago
    Sun & bug lotion: one simple solution

    I worked 40 years at USDA in the labs where mosquito repellents are discovered and tested for effectiveness and safety. DEET was found in 1954 by USDA entomologists and chemists (like me). There had been continuous testing of more than 25,000 compounds as effective repellents during WWII. DEET has been used safely in billions of doses since then. It is stinky and does melt some plastics but it is effective for 7 hours after a single treatment. Please do not put a quart on your baby: people have done that. DEET was adapted by the US Army because it was 100% effective for 7 hours. A recent publication by University of Florida confirmed these findings, showing again that natural light oils like lemongrass oil are effective for only about 30 minutes. DEET is excellent protection aga...see more »I worked 40 years at USDA in the labs where mosquito repellents are discovered and tested for effectiveness and safety. DEET was found in 1954 by USDA entomologists and chemists (like me). There had been continuous testing of more than 25,000 compounds as effective repellents during WWII. DEET has been used safely in billions of doses since then. It is stinky and does melt some plastics but it is effective for 7 hours after a single treatment. Please do not put a quart on your baby: people have done that. DEET was adapted by the US Army because it was 100% effective for 7 hours. A recent publication by University of Florida confirmed these findings, showing again that natural light oils like lemongrass oil are effective for only about 30 minutes. DEET is excellent protection against Zika vectors like Aedes species and Culex species and the Asian Tiger mosquito. Personally, I like using non-stinky 7% picardin, now available in North America. Please do NOT let potential Zika, dengue, or chikungunya vector mosquitoes bite you because you are too careless to use an effective repellent. Please protect your unborn children from horrible microcephaly: sadly, it lasts a very long lifetime.

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