Natural Science Review is an open access journal. All articles are freely and immediately available to readers without subscription, registration, or access fees. Users may read, download, copy, distribute, print, search the articles, link to their full texts, crawl them for indexing, pass them as data to software, or use the materials for any other lawful purpose in accordance with the Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0). Commercial use of the materials, including the reproduction of text, tables, figures, or other elements of an article in books, journals, or other publications issued by commercial publishers, requires the prior written consent of the authors.