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Thread: What are you working as guys? do you like your jobs?

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    #51
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    BecomingJulie's Avatar
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    While we're vaguely on subject, FUBAR, how long after using permethrin before the room is safe for cats?

    Spook has gone and picked up some little unwanted guests. I've not had any bites myself, but I've got to spray the carpets upstairs and the furniture to kill off any eggs that may be waiting to hatch.

    What I don't want is to poison him .....
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    #52
    Bluelighter F.U.B.A.R.'s Avatar
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    Quote Originally Posted by BecomingJulie View Post
    While we're vaguely on subject, FUBAR, how long after using permethrin before the room is safe for cats?

    Spook has gone and picked up some little unwanted guests. I've not had any bites myself, but I've got to spray the carpets upstairs and the furniture to kill off any eggs that may be waiting to hatch.

    What I don't want is to poison him .....
    Are we talking dry powder or liquid formulation?

    Either way, permethrin will not kill the eggs, only the adult stage of the life cycle.

    First you need to give your moggy a good going over with a flea comb outside to remove as many eggs from the fur as possible.

    Unfortunately, an adult female flea can lay up to 50 eggs per day and many drop off onto carpets, furnishings, clothing and bedding.

    You need to hoover the fuck out of everything that won't fit in the washing machine. Throw the bag away, then hoover again and again.

    The good news is that flea eggs don't survive temperatures over 60?C, so boil wash your clothing, bedding, cushion covers etc. then tumble dry on high heat setting if possible.

    As for the permethrin, don't let your cat come into contact with the dry powder or wet spray. For some reason, cats are more susceptible to permethrin toxicity than many other mammals, though if using a liquid spray, it's much safer once dried and the residue is still effective as an insecticide.

    Permethrin is a synthetic pyrethrin - the organic equivalent is pyrethrum (obtained from the chrysanthemum flower). Organic pyrethrins are safer for cats than permethrin, so you could consider using that as an alternative.

    Repeated applications of the insecticide will be required at 2 - 3 week intervals to treat any adults arising from eggs you may have missed during vacuuming and washing.

    The bad news is that fleas can lie dormant during the pupal phase for months until conditions are right for the adult to emerge.

    Might be easier to just get rid of your cat
    Last edited by F.U.B.A.R.; 22-05-2018 at 20:27.
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    #53
    LOL blondin. Did something like that with potassium. it involved a fish tank and a large chunk of K, which exploded violently, somehow the tank itself survived without being shattered into tiny pieces, and its propelling the big blob of molten potassium up onto the ceiling, with a terrific CRACK!, where it stuck, and began to rain down molten blobs of metallic potassium back down into the tank of water, exploding in a chain of staccato thumps.

    Everybody else diving under the lab bench for cover, teacher and classroom assistant turning pale and looking somewhat traumatized.

    Sodium can make a fair old bang, but its nothing like what happens after a (pretty large) chunk of potassium metal goes into a fish tank. Watching the portion of the K that hadn't immediately exploded violently on contact with the water in the tank dripping back down like rain off the ceiling and back down into the water again repeatedly, that was absolutely hilarious. Sounded like a machinegun firing, after an initial large explosion. I wonder if there is still a burn mark on the roof of my old special-ed school's lab. Everybody else, pupils and teachers both looked like they just about shit their britches, whilst I was doubled over laughing my arse off.
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    #54
    Loginnotsecure-might not have a formal job, but I'm creative enough, and I am certainly not without resources.

    And as for making furniture; never made any tables, chairs etc. since I haven't had the need to. But just finished building this yesterday, I needed a test-tube rack, so I went and built this:












    And currently turning this: (a saturated solution of sodium bromide in H2O, passing Cl2 through it to convert the bromide to elemental bromine. Starting out just light orange as the first Br2 was liberated and went into solution, as bromine water)



    To this: (after using a mixture of potassium permanganate and hydrochloric acid to generate more chlorine, see how much darker it has become, almost completely opaque [photo doesn't show it well, but on top of the Dimroth condenser, there is a vigreaux plugged in to ensure the bromine doesn't start vaporizing away into the air, the flask is immersed in an ice-water bath and the condenser is circulating ice water through its central coil also]



    Should be ready for distillation after one more round of gassing (with Cl2)
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    #55
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