Connected on 2014-09-10 23:30:00 from South Delhi, Delhi, India
- Bugscope Team Still setting up the presets.
- Bugscope Team Hello, K and Hannah!
- Teacher hello
- Teacher is all set, children are waiting!!
- Bugscope Team MBK you have control of the microscope.
- Bugscope Team you may click on any of the presets, to the left (on the lefthand screen), and the microscope will drive to the selected position.
- Bugscope Team the children may log in if there are computers for them, as students, or you may type questions they may have for us
- Bugscope Team this is a cucumber beetle
- Bugscope Team MBK you may also control the microscope directly, using the tools at the top of the viewing screen
- Bugscope Team do you see my messages?
- Teacher yes
- Bugscope Team this is the head of a leafhopper
- Teacher thanks for providing session
- Bugscope Team you can see its antennae, and you can see its eyes, although it is hard to recognize them
- Bugscope Team its mouthparts are down low in the current view
- Bugscope Team Good! You have control over the scope. You can move by clicking on the image (once, not double-clicking), you can change the mag etc. by clicking on +/- buttons, and you can go to a preset. To get to the presets, click on the leftwards pointing blue arrow, then select one from the given list.
- Teacher does it have eye?
Bugscope Team yes it has two eyes, and we can see them now
Bugscope Team the eyes are streamlined into the head
- Teacher how does an electron microscope differ from a normal microscope
Bugscope Team it uses electrons rather than light to produce images; the samples in this case at least must be coated with a conductive metal; it provides better resolution compared to light because electrons are so small compared to the wavelengths of visible light
- Bugscope Team the facets of teh eye are called ommatidia
- Bugscope Team the leafhopper has ommatidia as well, but in the case of the leafhopper they are streamlined and covered with brochosomes
- Bugscope Team this is the compound eye of a very small ant
Bugscope Team each of those bumps are called ommatidia
Bugscope Team each of these ommatidia help collect a part of the image
Bugscope Team this creates a sort of mosaic to create a complete image for the insect, in this case, an ant
Bugscope Team the number of ommatidia in different insect species varies. Within ants, ants eyes can have hundreds or thousands of ommatidia or less than ten. sometimes they have lost their eyes completely
- Bugscope Team insects and comparable arthropods have an exoskeleton, like a hard shell, or like armor
- Teacher what's that hair like strand on the leftern most ommatidia
Bugscope Team those are sensory setae that help the ant feel what might be touching its eye
Bugscope Team You'll find setae all over the place. I'm sure you'll see more on the other insects. Good work contolling the scope to isolate it.
- Bugscope Team some insects have, in addition to the two compound eyes they may or may not have, three other simple eyes called ocelli
- Teacher why does the ant need so many eyes?
Bugscope Team Technically the ant only has two "eyes". The ommatidia are individual units of the compound insect eye. The ant needs each ommatidia to help form the complete image that the ant sees.
Bugscope Team The moth head preset has an excellent view of an eye typical of many lepidoptera (butterflies and moths).
- Bugscope Team most ants and insects that spend a lot of time in the dark or underground and otherwise not have a great need for vision tend to have a reduced amount of ommatidia
Bugscope Team dragonflies on the other hand have lots of facets on their compound eye, since they rely heavily on vision to hunt
- Bugscope Team setae can be mechanosensory, chemosensory, and thermosensory
- Teacher Do insects sweat?
Bugscope Team they do not sweat, but they control the influx and efflux of liquids using their spiracles
- Teacher please reply bros
- Teacher Is that the eye that we are watching
Bugscope Team the eyes are on the sides of the head, next to the anntenae (one of them is broken off)
- Bugscope Team The antenna on the right side is broken off.
- Bugscope Team I think these pits are chemoreceptors.
- Teacher what is the size of a mite?
Bugscope Team This one is about 1mm. In the lower left of the image is a scale bar that helps you estimate sizes on the screen. Mites are often just a tiny fraction of the size of their hosts.
Bugscope Team Maybe 0.5mm.
Bugscope Team Not all mites are parasitic. Some free living mites, like the velvet mites, are large enough to see relatively clearly with the naked eye
Bugscope Team True true! Was focused on the parasitic ones we often see here. Thanks for that up!
- Bugscope Team Scott zoomed in on that. Very impatient. ADHD.
Bugscope Team Or caffeine.
- Bugscope Team Hamuli !
- Bugscope Team Ants do almost all of their communication via chemicals.
- Bugscope Team the spiracles are tiny pores on the sides of each body segment that the insets can open and close
Bugscope Team these spiracles is how air gets in and the oxygen is then brought directly to each cell
Bugscope Team The air travels through the spiracles into ducts called tracheae, which eventually thin out into smaller ducts called tracheoles, which eventually supply oxygen directly to the cells
Bugscope Team unlike vertebrates, which use their blood to transport oxygen to cells, insects use their spiracles and tracheae to do so
- Teacher what is a spiracle??
Bugscope Team They are openings to the insects respiratory system. Insects do not use their blood to transport oxygen, but instead have a series of ducts called tracheae which provide oxygen directly to the cells. The openings to these ducts are called spiracles
- Teacher what is a hamuli?
Bugscope Team In the order hymenoptera (ants, bees and wasps), the front and hind pairs of wings are linked together by a series of microscopic hooks called hamuli. This allows these insects to flap their two pairs of wings simultaneously, which allows them to manipulate more easily when they fly and to fly faster. Many more advanced insect groups have evolved so that they only use one pair of wings for flight, or so that their two pairs of wings are linked. some moths also have their two pairs of wings linked, but using a more primitive mechanism.
Bugscope Team in moths they are called frenulum and retinaculum, it's a bristle and a hook, respectively.
Bugscope Team Thanks Joe, I always forget what they are called in moths
- Bugscope Team We did not see any spiracles while we were setting up the session.
Bugscope Team Spiracles are typically located on the sides of insect abdomens and thoraxes. Since most of these insects appear to be laying on their backs, it may be difficult to see them
- Bugscope Team Scott is tweaking the focus for you to save time.
- Teacher what is a palp?
Bugscope Team A palp is one of the insects mouth parts. They are typically used to taste and manipulate food items, and are effectively the "tongues of insects". Insects usually have two pairs of palps, the labial and maxillary palps
- Teacher Thanks
Bugscope Team No problem :)
- Bugscope Team MBK, these are on the leafhopper.
- Teacher what are brochosomes?
- Bugscope Team Brochosomes are nanoparticles that are produced by leafhoppers, in the Malpighian tubules.
- Bugscope Team Leafhoppers spread them on their bodies in what is called an anointing behavior.
- Bugscope Team Sometimes they are ovoid.
- Bugscope Team Brochosomes are sometimes thought to help preserve eggs from desiccation.
Bugscope Team Are brochosomes unique to leafhoppers or do other insects produce them as well?
Bugscope Team They are thought to be unique to leafhoppers.
Bugscope Team I don't think I've ever heard of them before. I guess I learned something today!
- Teacher is this maximum focus?
- Bugscope Team In our experience they are usually 250 to 400 nm in diameter.
- Bugscope Team We are pushing the limits of resolution at this working distance.
- Bugscope Team This is the inside of the specimen chamber.
- Bugscope Team It is under vacuum.
- Bugscope Team This is one of the leafhopper's compound eyes.
- Teacher wow!! how cool is that!
- Bugscope Team Do the students have any questions?
- Bugscope Team This is a huge wasp that we found in the parking garage.
- Bugscope Team These are the palps.
- Bugscope Team You can see the compound eye on the left.
- Bugscope Team See the tiny hexagons.
- Bugscope Team You can see there are some mechanosensory setae like the ones you found on the ant's eye.
- Bugscope Team When we operate the scanning electron microscope for research, we use a shorter working distance and thus get better resolution. The trade-off is that at a shorter working distance, we cannot go to a very low magnification, which allows us to see more of each insect.
- Bugscope Team 5 o'clock shadow forming...
- Bugscope Team It is about time for us to shut down. Do you have any questions for us?
- Bugscope Team This is the wasp claw. The central portion we see now helps it adhere to surfaces.
- Bugscope Team This is the wasp claw. The central portion we see now helps it adhere to surfaces.
- Bugscope Team Oops. How did that happen?
- Bugscope Team Totally cool photos!
- Bugscope Team Thanks for the photos! We LOVE getting feedback like that from classrooms. Hello everybody!!!!
- Bugscope Team I see you are using Ubuntu! Linux users, UNITE!
- Bugscope Team Nice image, nice control of the microscope!
- Bugscope Team and not a cat.
- Bugscope Team Nice ants.
- Bugscope Team time for us to go...
- Bugscope Team Raghav we have enjoyed working with you and your class -- this is the inaugural Bugscope session of the season!
- Bugscope Team Thank you all so much for participating! You did an excellent job! I hope everyone had fun and learned some things. :)
- Bugscope Team this is a transcript of your session: http://bugscope.beckman.illinois.edu/members/2014-061
- Bugscope Team Goodbye, Everyone!
- Bugscope Team Thank you!