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Top Tip: live sperm in the classroom

This is a guest post by Deb Barnett who was the lab tech at the first school to order live boar semen.  This post puts Deb in the running to win our t-shirt competition.

The kids love it!!

It gave us a relevant and interesting resource for the unit. We even had the most disengaged student managing the microscope and getting the best view of the goings on the slide.

The sample maintained viability through the week even though the ice brick had defrosted on arrival and it was warmer than the suggested 15-20 degC in the esky. Arrival time was approx. 12.10pm Monday. I followed the recommended storage conditions throughout.

Just a few notes on how the prac was run here….  A small vial and dropping pipette (1 for each class) was placed in the incubator at 38degC until required. When the class had set up the ‘scopes and warmed their slide between their hands, I aliquoted approx 1mL into a vial and took it straight to class where the teacher kept it warm in their hand whilst walking around the lab putting 1 drop directly on the slide for each group. No “lab accidents”

So, thanks again – a good time was had by all.

Good luck with the business, you’ve certainly hit the spot with it!

 

 

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Cheryl Hayashi: The magnificence of spider silk on TED

Huntsman spider
Cylon 2012 - the Huntsman spider that has decided to live in our bathroom this year

My spidey sense is really tingling this week.  I had downloaded this TED podcast of Cheryl Hayashi talking about spider silk, where it comes from and all it’s amazing properties.  I listened to it in the car this week and it was so good I’ve tracked down the video for you to have a look at.

Cheryl talks about dissecting an orb weaving spider, which I’ve never done.  But, now that she has put the idea into my head, I’m really keen to have a go.  To be honest I wouldn’t really know where to start, but if I find a dead orb weaver around the property I might see what I can do.

We’ve also had a visit from a pretty magnificent Huntsman spider in the house this week.  She’s taken up residence in the bathroom near the nightlight to hunt.  The photo really doesn’t do her size and hairiness justice.  She’s so big I can see her two rows of shiny eyes without my glasses on – which is really saying something, believe me.

We usually get a couple of Huntsmans a year come into the house to hunt and breed.  We don’t mind and we usually christen them Cylon while they are visiting, but they are very messy eaters and the carnage on the floor in the mornings is a bit much.  One night Mr Vivi looked up at the living room ceiling and hundreds of tiny Huntsmans were coming out between the ceiling boards to say hello.  I think he took a photo.  I’ll ask him to post it here if he has it.

Miss Vivi

 

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Anatomy of a spiderweb

If you’ve ever stood and looked at a spiderweb for any length of time you can’t help but be impressed by the work that goes into it.  We have a lot of orb spiders here and there is one in particular that builds a web across the driveway that is over a metre in diameter.  If we knock a bit of it down on our way out to the shed in the dark then it is usually repaired by the time we come back.  It’s a pretty amazing piece of architecture, even if you do have eight hands to hang on to all the strings.

The parts of the web of an orb spider

Image from brisbaneinsects.com

I’ve never thought about the ‘anatomy’ of a spider web before but, now that I’ve seen this diagram on brisbaneinsects.com via the ABC Science Facebook page, I realise that if you’re going to study something the first thing you need to do is name the parts so you can discuss it intelligently.

So, just for a bit of fun here is the Anatomy of a Spider Web.  In case you ever find yourself on my driveway with not much else to talk about!

Miss Vivi

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Happy New Year!

So, here we are at the beginning of Term 1 for 2012 and we’re all about to dive into the Australian National Curriculum for classes up to Yr 10.

Here at Dissection Connection we’re starting the year with a new price list.  It’s over there on the right under Downloads –>  It’s in a slightly different format, hopefully organised to make it easier to use.   Feel free to have a squeal if you have any comments about it.

There are some new dissection specimens worth squealing about so look out for a newsletter in your inbox soon.

We hope you’ve had some great times over Christmas and New Year.  We’re looking forward to hearing from you very soon.

Miss Vivi

and

Mr Vivi