منابع مشابه
A rediscovery of Alfred Russel Wallace ’ s fern collection from Borneo at the Cambridge University
Alfred Russel Wallace spent eight years in South-East Asia studying the biodiversity of the region in the course of visits to Malaysia, Singapore and Indonesia. His collections, extensively and scrupulously acquired in the Malay Archipelago, include zoological specimens such as insects, birds, reptiles and mammals. In addition, Wallace collected botanical and ethnological material. The bulk of ...
متن کاملA rediscovery of Alfred Russel Wallace ’ s fern collection from Borneo at the Cambridge University Herbarium
Alfred Russel Wallace spent eight years in South-East Asia studying the biodiversity of the region in the course of visits to Malaysia, Singapore and Indonesia. His collections, extensively and scrupulously acquired in the Malay Archipelago, include zoological specimens such as insects, birds, reptiles and mammals. In addition, Wallace collected botanical and ethnological material. The bulk of ...
متن کاملManganese minerals in geodes from Chihuahua, Mexico
Seven manganese minerals have been observed in geodes from Chihuahua, Mexico. Ramsdellite occurs in a number of different habits, but the morphology and precession X-ray patterns suggest that it is pseudomorphous after groutite. Pyrolusite is found only in association with ramsdellite and is believed to be an alteration product of that mineral. Todorokite generally occurs as a late-stage fibrou...
متن کاملUnusual Flavanones from a Rare American Fern
Notholaena fendleri, Polypodiaceae, Farinose Exudate, Novel Flavanone Notholaena fendleri is a rare representative of the genus, growing mainly in Colorado/USA. The white farinose exudate on the lower surface of its pinnules is composed partly of waxy material and partly of flavonoid aglycones. The flavonoid moiety consists mainly of methyl derivatives of the flavanones naringenin and eriodicty...
متن کاملNarcolepsy in a hypocretin/orexin-deficient chihuahua.
A two-year-old male chihuahua suffered attacks of muscle weakness and immobility, although it had no family history of paroxysmal attacks. No neurological or blood biochemical abnormalities were recorded when it was first examined. The attacks were typically elicited by stimulation, such as feeding, and a case of sporadic narcolepsy-cataplexy was therefore suspected. Treatment orally three time...
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ژورنال
عنوان ژورنال: American Fern Journal
سال: 1942
ISSN: 0002-8444
DOI: 10.2307/1545217