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The Microcosmos Around Us

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The Microcosmos Around Us The rom on Vigyanotsav 2019 University of Hyderabad, 9 February, 2019 Science Education Group TIFR Centre for Interdisciplinary Sciences Gopanpally, Hyderabad 1 Sci in ya l The scientific method begins with an observation that leads to a question about the observed phenomena. 2 Observing the unobserved Antonie van Leeuwenhoek (1632-1723) Microscopic section of ash tree wood drawn by Leeuwenhoek Infusoria-1674 (Protozoa observed by Leeuwenhoek) 3 How did Leeuwenhoek do it? Leeuwenhoek’s microscope Source: https://en.wikipedia.org/wiki/Antonie_van_Leeuwenhoek 4 The secret of Leeuwenhoek’s microscope C.L. Stong (1957) Preparing the Objective lens Glass sphere microscope Source: http://www.funsci.com/fun3_en/usph/usph.htm 5 Today’s techniques ● Micro-scale plastic molding ● Centerless ball grinding Medical endoscope Optical fibre coupler Phone camera Hairpin microscope A lens for 15 Rupees!!! 6 Source: https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0098781 Two biomechanical engineers Manu Prakash Jim Cybulski 7 Some common microscopes Compound microscope Dynam mini microscope Foldscope Magnification: 60X Cost: Rs. 549/- Magnification: 130X Cost: Rs. 120/- Magnification: 150X-400X Cost: Rs. 2000/- 8 A microscope for all !! Sample observation through Foldscope at Manikpur Ashramshala Foldscope session with middle school children, Ashramshala, Dhanora TSWREIS students folding the TSWREIS students with their 9 Foldscopes during Workshop Foldscopes Students observe, draw and question 10 Images / videos under Foldscope Garlic peel Spider Lily lower Lower epidermis: Cheek cells (stained Onion peel epidermis Birds of Paradise with methylene leaves blue) Search : TIFR microcosmos 11 Science in the kitchen Are tomatoes alive? 12 Are tomatoes alive? Tomato pulp (Pericarp) cells Source: http://saurabhg.com/microscopy/tomato-cells-microscope/ 13 Are tomatoes alive? Image Source: https://www.researchgate.net/publicat ion/262055762 Image Source: https://www.gardeners.com/how-to/se lecting-the-right-tomato-variety/5259 .html 14 Observing cells on leaf surface Stomata 15 Observing onion cells Onion tunic under Tunic of onion Foldscope Outer peel Inner peel Inner epidermis of onion scale 16 How are onions similar to leaves? Outer peel Inner peel Outer peel of onion (Lower epidermis) 17 What grows on onions? Spores eject out under water Outer skin peeled to show Conidiophore on the edge of the dry the fungus onion skin 18 Fungus on onions https://youtu.be/h8IaEGWnMzA Cornell’s Speedy Bio Aspergillus niger 19 Spots on curry leaves Curry leaves with brown spots Brown spot observed under Foldscope 20 Source: https://microcosmos.foldscope.com/?p=64059 What is that? Head Abdomen Entire body Source: https://microcosmos.foldscope.com/?p=38117 21 Patthar phool / Kalpasi Source: https://microcosmos.foldscope.com/?p=114384 22 Water samples Filamentous algae-Oedogonium Pedestal pond Puddle formed by Manjeera pipe leakage Rainwater pool Moss and Moss on rainwater concrete mixed in a tank vial 23 Communicate your methods and findings 24 25 26 27 28 You too can do it! Begin with observations Ask questions Connect the macro with the micro Connect textbook facts with reality Make sense of observations Communicate you learning! 29 You may use microscopes in your school lab Or foldscopes 30 Ways of getting Foldscopes From foldscope.com: classroom kit (20) + import duty -- Rs.150/- Sponsored by Department of Biotechnology From Flipkart or Amazon -- more expensive 31 Thank you! Presentation by: Debashree, Ashalatha, Jayashree 32.
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