{"id":1758,"date":"2016-12-30T05:09:52","date_gmt":"2016-12-30T05:09:52","guid":{"rendered":"http:\/\/astan.lk\/al_virtualclassroom\/wp-content\/uploads\/2016\/12\/6053305_orig.jpg"},"modified":"2016-12-30T05:11:00","modified_gmt":"2016-12-30T05:11:00","slug":"light-micrograph-of-radial-and-pennate-diatoms-under-darkfield-illumination","status":"inherit","type":"attachment","link":"https:\/\/astan.lk\/al_virtualclassroom\/ta\/kingdom-protista\/light-micrograph-of-radial-and-pennate-diatoms-under-darkfield-illumination\/","title":{"rendered":"Light micrograph of radial and pennate diatoms under darkfield illumination"},"author":842,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0},"class_list":["post-1758","attachment","type-attachment","status-inherit","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Light micrograph of radial and pennate diatoms under darkfield illumination - Learning &amp; 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Diatoms are protists which have shells sculpted out of silicon oxide.  After the living protist has perished the shells remain.  These clear shells are comprised of two halves called valves.  Diatom shells and their corresponding patterns respond to beautifully and artfully to a variety of colorful microscopic illumination techniques.  Many are so intricately detailed that they have long been used as test objects for microscope objectives.\r\rThere are two major classes of diatoms: centric and pennate.  Centric diatoms have patterns arranged radially, around a central point, known as radial symmetry. Pennate diatoms have bilateral symmetry, left and right matching halves, and are generally needle or boat shaped.\r\rWhen alive, diatoms are brownish green in color a live almost everywhere, from open waters to quiet shallows.  They may live alone or in colonies.  \r\rIn the mid to late 19th century Victorian era mounters created patterns of them on microscope slides using micro manipulators. Diatoms are a favorite of microscopists for their beauty.  Originally they were used for testing the resolving power of objectives. These are highly sought after.\r\rKingdom: Protists, Phylum: Bacillariophyta\r\r\rPhotomicroscope I on Ektachrome Tungsten 35mm color film, with various  illuminations and colors at 80X, 160x on a 4x6 inch print.","created_timestamp":"0","copyright":"(C) 2013 Kent Wood ALL RIGHTS RESERVED","focal_length":"0","iso":"0","shutter_speed":"0","title":"Light micrograph of radial and pennate diatoms under darkfield illumination","orientation":"0","keywords":["diatom","diatoms","diatomacae","protozoa","protozoology","zoology","protists","micrograph","light micrograph","microscopy","microscopist","microscopic","micro-life","microorganisms","photomicrograph","diatomaceous earth","radial","pinnate","brightfield","darkfield","phase contrast","Rheinberg","DIC","differential interference contrast","Nomarski","Kent Wood","Kent Wood Photography"]}},"post":368,"source_url":"https:\/\/astan.lk\/al_virtualclassroom\/wp-content\/uploads\/2016\/12\/6053305_orig.jpg","_links":{"self":[{"href":"https:\/\/astan.lk\/al_virtualclassroom\/wp-json\/wp\/v2\/media\/1758","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/astan.lk\/al_virtualclassroom\/wp-json\/wp\/v2\/media"}],"about":[{"href":"https:\/\/astan.lk\/al_virtualclassroom\/wp-json\/wp\/v2\/types\/attachment"}],"author":[{"embeddable":true,"href":"https:\/\/astan.lk\/al_virtualclassroom\/wp-json\/wp\/v2\/users\/842"}],"replies":[{"embeddable":true,"href":"https:\/\/astan.lk\/al_virtualclassroom\/wp-json\/wp\/v2\/comments?post=1758"}],"wp:attached-to":[{"embeddable":true,"post_type":"post","id":368,"href":"https:\/\/astan.lk\/al_virtualclassroom\/wp-json\/wp\/v2\/posts\/368"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}