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Our greeting cards are 5" x 7" in size and are produced on digital offset printers using 100 lb. paper stock. Each card is coated with a UV protectant on the outside surface which produces a semi-gloss finish. The inside of each card has a matte white finish and can be customized with your own message up to 500 characters in length. Each card comes with a white envelope for mailing or gift giving.
Color enhanced scanning electron micrograph (SEM) of pollen grains (green) from the common ragweed (Ambrosia artemisiifolia) covered in fine dust... more
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Color enhanced scanning electron micrograph (SEM) of pollen grains (green) from the common ragweed (Ambrosia artemisiifolia) covered in fine dust (brown). The grains have a spiked outer wall (exine), which may assist in their dispersal by improving their adherence to pollinating insects. The characteristic surface of pollen grains is used by botanists to recognise and classify plants. Each pollen grain contains a male gamete (reproductive cell) that is intended to fertilise an egg or ovule (female gamete), and initiate the formation of a seed for a new plant. These pollen grains are an allergen that may cause hay fever in susceptible individuals. Magnification x3400 when printed at 10 cm wide.
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