Connected on 2012-05-01 16:00:00
from Alameda, California, United States
- 3:11 pm
- Bugscope Teamwe are almost there...
- Bugscope Teamwaiting for the vacuum
- 3:17 pm
- 3:23 pm
- 3:28 pm
- 3:34 pm
- Bugscope Teamcool spider
- Bugscope Teamyeah good job
- Bugscope Teamthis stuff I don't know, though; the 'lace things'
- Bugscope Teamyes dante's inferno
- 3:40 pm
- Bugscope TeamHello!
- Bugscope TeamWelcome to Bugscope!
- Bugscope Teamwe're still collecting presets for your session
- Bugscope Teamladybugs are not so cute when they're young
- 3:45 pm
- 3:51 pm
- Bugscope Teamwe are ready to roll
- 3:58 pm
- Bugscope Teamyou turned around and it appeared? (honeybees)
- Bugscope Teamhi!
- Bugscope TeamWelcome to Bugscope!
Bugscope Teamyou have control of the 'scope whenever you wish
- Bugscope Teamplease let us know if you have any trouble and when you have questions about anything
- Bugscope Teamthis, presently, is the ball and socket joint on the head of a wasp
- Bugscope TeamTeach you can select from any of the presets on the lefthand screen, by clicking on one.
- Bugscope TeamYou can also drive the 'scope directly: change mag, brightness, contrast, focus
- Bugscope Teamand you can click on the image itself to center a feature
- Bugscope Teamall of the images and the chat are saved to your member page
- Bugscope Teamspider!
- Bugscope Teamthis is the underside of the spider's jaws
- Bugscope Teamthis is a ladybug with a renegade aphid stuck to it
- 4:04 pm
- Bugscope Teamback to the spider, which may be a wolf spider, smaller and muscular
- Bugscope Teamthis is a big spider that one of our lab techs told me are sometimes kept as pets! (they aren't tarantula big)
- Bugscope Teamyou can see one of the poison ducts
- StudentWhy can't I click on an image?
Bugscope Teamum it looks like it's working, from here -- you just clicked on the pore, and it's on the screen; is it not working there?
- Bugscope TeamI should say Is it working for you now?
- Bugscope Teamnow you're on the fruitfly claw
- StudentI can't see it in a big view.
- Bugscope Teamif it's not working there you may have some web blocking software. Can you see it by refreshing your browser?
- Bugscope Teamwhen you go to the center screen, what do you see now?
- Bugscope Teamwe see the fruitfly claw
- 4:09 pm
- Bugscope Teamthese are all live images acquired from the microscope.
- Studentgreat I see it now.
- Bugscope Teamnow we are magnified in on the claw
- StudentHow do I move to a different picture? I would like to see the picture of the spider.
Bugscope Teamyou are actually driving a scanning electron microscope from your classroom, so you are seeing live images, as Cate said
- Bugscope Teamso if you go to the lefthand screen and click on the spider chelicers/fangs, the 'scope will drive to that place and the image will show up on the central screen
- Bugscope Teamthe little groups of tendrils are tenant setae, which are special hairs on the claw that help the fly walk on walls
- StudentWhat are those things on the claw of the fruitfly?
Bugscope Teamwe see some bristles, or setae, that help it sense when it is grasping something, and the smaller flower-like setae to the left are tenent setae, which help the fruitfly cling to surfaces
- Bugscope Teamsome of the fine stuff we see is dirt/debris
- Bugscope Teamlet us know if we can help with presets if they are not working as you wish
- 4:15 pm
- Bugscope Teamin the hour before you log on, we look over the stub for cool stuff and save the positions of those particular things as presets. when you click on the preset, the 'scope drives to that stored position
- Bugscope Teamsometimes the preset will not match the image we took because the specimen has drifted a bit since we saved the preset
- Bugscope Team20 microns is the same as 20 micrometers, or a 50th of a millimeter
- StudentCan we get a closer look at the spider fang
Bugscope Teamthere you are
- Bugscope Teamthere is where the venom comes out
- Bugscope Teamyou can see in the upper left on the bottom part of the fang there are even little serrations in the fang
- StudentWhat is the "stuff" around it?
Bugscope Teamsome of it is web -- silk
- Bugscope Teamsome of it is dried goo
- Studentis the string that runs across the fang web silk?
Bugscope Teamyes it is!
- 4:20 pm
- Bugscope Teamwhat we see below is some juju that had dried onto the fang and then cracked off
- Studentcan we get a better look at the spider's head?
Bugscope Teamthis is the best we can do, DaddyO; it's mounted so we cannot see the eyes
- Bugscope Teamso here you can see its chelicers
- Studentcan we get a close up on the spiders legfs
- Bugscope Teamthis spider was definitely using these special hairs on its legs before it was captured. It was sitting on the wall
- 4:26 pm
- StudentOpps. I meant lefs
- Studentwhat is that circle on the leg
- Bugscope Teamthat is some kind of latex, I think
- Bugscope Teamhard to tell
- Bugscope Teami think scott it right. it doesn't look like a pollen grain or mold spore
- Studentso it's not part of the spider
Bugscope Teamno definitely not
- Bugscope Teamit is really cool that we can see all of those fine setae
- Studentcan we possibly take a look at it's eyes?
Bugscope Teamno I am sorry -- we had a choice between the chelicerae and the eyes, and we mounted it upside down
- 4:31 pm
- Bugscope Teamthis is as close as you can get
- Bugscope Teamyeah its head it very much stuck down right now. sometimes we can see a little bit of it, but not with this one
- StudentI am a student, what are those cirlces in the backround
Bugscope Teamthose are bubbles in the carbon doublestick tape, and they have silver paint on them
- StudentCan we see the part of the spider that spins the web?
Bugscope Teamthis is one of the spinnerets
- 4:37 pm
- Studenthow many spineretes are there
Bugscope Teamusually there are four
- Studentwhat exactly are we looking at?
Bugscope Teamthis is the tip of the abdomen
- Studentwhere are the spinneretts
Bugscope Teamit is kind of hard to see them with all the setae around them
- Bugscope Teamthis one is pointed to the left
- Bugscope Teamthis spider is very hairy
- Bugscope Teamyou can see some web
- Bugscope Teamand a whole lot of plumose (pine tree like) setae
- 4:42 pm
- Bugscope Teamthe things right in the center, smooth, are the spinnerets -- the parts that actually spit out silk
- Studentis this structure we see the spinnerete?
Bugscope Teamthis is one but you cannot see the tip, which is to the left and up
- StudentIs this a ladybug head?
- Studentdoes it use one spinnerete at a time
Bugscope TeamI am not sure. Some produce non sticky silk, and some produce sticky silk.
- 4:47 pm
- Bugscope Teamspider silk is made of protein. Sometimes when they get extra hungry they will eat their old webs
- Bugscope Teamthey are conscientious recyclers
- Studentare the spinneretes in differnet spots
Bugscope TeamI am not sure we are using the terminology correctly. There are usually four turret-like things at the tip of the abdomen, and there are a number of silk-producing spigot-like things in each one.
- Bugscope Teamrecently it was discovered that some spiders, I think tarantulas, can also exude silk from the tips of their legs.
- Bugscope Teamwe also know that many caterpillars, like the ladybug larva we see now, produce silk from organs on their head
- Bugscope TeamI believe that is where the silk comes from when caterpillars produce cocoons.
- 4:52 pm
- Bugscope Teamhere is a nice view of a moth eye
- Bugscope Teamyou can see the ommatidia -- the eye facets. and you can also see that there are setae sticking out from between some of the ommatidia.
- 4:58 pm
- TeacherIs it possible to see a whole spider?
Bugscope Teamtoday it is not. we made a sample with one spider on it and had to make a choice of how to position it. the sample is coated with gold-palladium, put inside the vacuum chamber, and pumped down so we can beam electrons at it in a vacuum.
- Bugscope Teamif we had a small spider and made a new sample you could see all of it, but you'd have to make a choice of what you wanted to see. because spiders are softbodied, they shrivel up when they dry, and it is hard to know what they're going to look like at high mag.
- TeacherWhat is an aphid Cornicle?
Bugscope Teamthey are attached to the abdomen of aphids where they exude a wax that helps protect them
- TeacherIt seems that we have reached the end of our time. Thank you for you time!
Bugscope Teamthanks for joining us today!
- Bugscope TeamThank you!