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The epidermal layers are removed by cutting the onion and peeling them off (they are the membrane-like sheaths between each onion layer). For advanced microscopy, such as fluorescence microscopy, the layers halfway between the outside and the centre of the onion are best. Light microscopes are typically used for observing onion cells.
Red onions (also known as purple or bluehi onions in some mainland European countries) are cultivars of the onion (Allium cepa), and have purplish-red skin and white flesh tinged with red. They are most commonly used in cooking, but the skin has also been used as a dye .
Allium hollandicum, the Persian onion [1] [2] or Dutch garlic, [3] is a species of flowering plant native to Iran and Kyrgyzstan [4] but widely cultivated as an ornamental because of its umbels of attractive purple flowers. [5] [6] [7] It is reportedly naturalized in Saint Louis County, Minnesota. [8] [9] [10]
An onion (Allium cepa L., from Latin cepa meaning "onion"), also known as the bulb onion or common onion, is a vegetable that is the most widely cultivated species of the genus Allium. The shallot is a botanical variety of the onion which was classified as a separate species until 2011.
Antonie van Leeuwenhoek (1632–1723). The field of microscopy (optical microscopy) dates back to at least the 17th-century.Earlier microscopes, single lens magnifying glasses with limited magnification, date at least as far back as the wide spread use of lenses in eyeglasses in the 13th century [2] but more advanced compound microscopes first appeared in Europe around 1620 [3] [4] The ...
Among the data that prior scientists had gathered, but not studied, was a link between creatine and brain health. There were signs that creatine supplementation, in clinical settings, might ease ...
Toluidine blue stain in a vasculitic peripheral neuropathy. Toluidine blue is a basic thiazine metachromatic dye with high affinity for acidic tissue components. [2] It stains nucleic acids blue and polysaccharides purple and also increases the sharpness of histology slide images.
Discover the standout moments of March 2024 through USA TODAY's photo collection, showcasing the month’s most impactful events and images.