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| Leaf of E. canadensis in water |
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| Leaf of E. canadensis with added solution of 2M NaCl. |
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| Onion peel (Allium cepa) in water. |
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| Onion peel (Allium cepa) with added solution of 2M NaCl. |
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| Untreated potato. |
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| Untreated paprica. |
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| Potato treated with Lugol solution. |
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| Paprica treated with Lugol solution. |
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| Leaf of E. canadensis treated with Lugol solution. |
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| Calcium oxylate crystals from outer scales of onions (Allium cepa). |
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| Tobacco leaves under microscope. No crystals visible. |
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| Untreated petal of Pelargonium flower. |
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| Petal of Pelargonium in a solution of 2M NaCl. |
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| Untreated petal of Petunia flower. |
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| Petal of Petunia flower in a solution of 2M NaCl. |
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| Calcium oxidate crystals from leaf of Tobacco plant treated with Ethanole. |
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| Top left) Pelargonium grown in sucrose Lower left) Pelargonium grown in water Top right) Tobacco leaves grown under light + dark Lower right) Tobacco leaves grown indark |
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