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  1. Peter Sigsworth

    How long do bunsen burners last?

    They can last indefinitely but 1960 was coal gas, so may not be compatible with natural gas - I do remember gas appliances having to be adapted to burn natural gas when we stopped using coal gas. I know that we have a third kind LPG - our LPG burners are different from the natural gas ones (they...
  2. Peter Sigsworth

    Who told them about algal balls!

    My pump is old and they don't make them anymore but a fluval Q2 would suffice in the 5L demijohn. The bigger your vessel the stronger the pump as it has to push against the increased pressure of larger volumes of water
  3. Peter Sigsworth

    Who told them about algal balls!

    As long as the solutions is being stirred up vigorously. This is mine in a 5L demijohn
  4. Peter Sigsworth

    Respiration Experiments

    follow this thread https://community.preproom.org/index.php?threads/maggots-and-respiration-stop-those-critters-causing-mayhem.4275/
  5. Peter Sigsworth

    Respiration Experiments

    I bag the creatures up in little party bags from ebay - so the other little creatures don't lose them on the floor or down someone's neck I then use a bung of cotton wool to separate from the soda lime
  6. Peter Sigsworth

    Magnesium Hydroxide Alternative for Neutralisation?

    OK, we do that one - it's good to know alternatives though- Magnesium Hydroxide would work also
  7. Peter Sigsworth

    Magnesium Hydroxide Alternative for Neutralisation?

    Is it Edexcel 'CC8d1 Investigating Neutralisation'? As the whole idea is that the Calcium Hydroxide power is almost insoluble in water so they measure the reaction by if it all dissolves in the acid - once the amount added reaches neutral it no longer dissolves. and they note the mass they have...
  8. Peter Sigsworth

    Appraisals - are they worth the time and effort

    Ever since my line manager changed from the Head of Science to the Bursar who knows nothing about my role (for goodness sake) 3 years ago, I haven't had an appraisal, nor do I want one, so I'll keep quiet.
  9. Peter Sigsworth

    Dusting off my Labcoat

    I think there's a good chance you'd be doing all three sciences, Nick
  10. Peter Sigsworth

    Who told them about algal balls!

    Yes to all your questions. Just a few drops of baby bio. Make sure you keep the solution well mixed with strong bubbling through an airstone
  11. Peter Sigsworth

    Mobile Fume Cupboard

    Ours is 3 years old and just had it's first new carbon filter which was just over £300 - seems not a bad price.
  12. Peter Sigsworth

    Mobile Fume Cupboard

    No it's plumbed into the main drain through the docking station
  13. Peter Sigsworth

    Mobile Fume Cupboard

    We bought a SAFELAB Airone - 1000RS with docking stations in the labs.- about three years ago and it's been great with regular servicing by them. Several suppliers sell them but I went direct to the manufacturers (British). They did me a great deal several hundred less than suppliers - they...
  14. Peter Sigsworth

    Removing wax from copper electrodes

    Apparently vegetable oil will dissolve candle wax then use soapy water the remove the oil - so I'm told. Petrol might work also.
  15. Peter Sigsworth

    labels and sticky residue on bottles

    Soak in hot water and remove the paper part the either IDA or white spirit soaked onto paper towel
  16. Peter Sigsworth

    Hi All I am a Senior technician for over 30 years and have never been told to trial experiments. My HoD is telling me to trial all experients to m

    If there are three of you - then you should split the trialling with the specialisms - you do your specialism (I guess not chemistry) and they do theirs
  17. Peter Sigsworth

    Hi All I am a Senior technician for over 30 years and have never been told to trial experiments. My HoD is telling me to trial all experients to m

    Oh - I didn't get the alert - in fact quite a few didn't show as an alert evn though I was 'watching' the thread
  18. Peter Sigsworth

    Hi All I am a Senior technician for over 30 years and have never been told to trial experiments. My HoD is telling me to trial all experients to m

    The original post says 'never been told to trial experiments' - that is why my first response was worded like it was (below) Unfortunately this threat has had a lot of responses but nothing further from the originator @saintcecilia03 ?
  19. Peter Sigsworth

    Hi All I am a Senior technician for over 30 years and have never been told to trial experiments. My HoD is telling me to trial all experients to m

    I can't help thinking there is more to this post than meets the eye - There must be something that has happened which has led the HoD to instruct the senior technician to trial experiments........... It could be that the school is not doing any class practicals and so the HoD is looking for...
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