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Retinal blood vessels that are similar to cerebral blood vessels maintain the inner blood-ocular barrier. This physiological barrier comprises a single layer of non-fenestrated endothelial cells, which have tight junctions. These junctions are impervious to tracer, so many substances can affect the metabolism of the eyeball.
Access to the full-text pdfs of non-open access publications require either a subscription (to the specific journal rather than to the whole database) or per-article/book payment. Subscriptions to the overall content hosted on ScienceDirect, rather than to specific titles, are usually acquired through what is called a big deal .
Self-archiving by authors is permitted under green OA. Independently from publication by a publisher, the author also posts the work to a website controlled by the author, the research institution that funded or hosted the work, or to an independent central open repository, where people can download the work without paying.
Postsecondary science textbooks published by academic publishers are often excellent secondary sources, though they may need to be supplemented with more recent research. If a book has students as its declared target audience, it may not be as complete as a monograph or chapter in a book intended for professionals or postgraduates.
He plagiarized as many as 60 papers in the field of cancer research, many with non-existent co-authors. [ 11 ] [ 12 ] [ 13 ] Werner Bezwoda (South Africa), formerly of the University of Witwatersrand , admitted to scientific misconduct in trials on high-dose chemotherapy on breast cancer , stating that he had "committed a serious breach of ...
In plant biology, the perforations in a perforate leaf are also described as fenestrae, and the leaf is called a fenestrate leaf. The leaf window is also known as a fenestra, [5] and is a translucent structure that transmits light, as in Fenestraria.
The Meaning of It All: Thoughts of a Citizen Scientist is a non-fiction book by the Nobel Prize-winning physicist Richard Feynman. It is a collection of three previously unpublished public lectures given by Feynman in 1963. [1] The book was first published in hardcover in 1998, ten years after Feynman's death, by Addison–Wesley.
An intercellular cleft is a channel between two cells through which molecules may travel and gap junctions and tight junctions may be present. Most notably, intercellular clefts are often found between epithelial cells and the endothelium of blood vessels and lymphatic vessels, also helping to form the blood-nerve barrier surrounding nerves.