User talk:Membrane expert

July 2015
Hello, I'm Velella. I wanted to let you know that I undid one or more of your recent contributions to Membrane technology because they appeared to be promotional. Advertising and using Wikipedia as a "soapbox" are against Wikipedia policy and not permitted. Take a look at the welcome page to learn more about Wikipedia. ''Promoting published papers from a particular author is a form of link spam and is deprecated on Wikipedia. In any case Wikipedia requires secondary or tertiary sources and not primary sources.''  Velella  Velella Talk 20:20, 30 July 2015 (UTC)

Please do not add inappropriate external links to Wikipedia. Wikipedia is not a collection of links, nor should it be used for advertising or promotion. Inappropriate links include, but are not limited to, links to personal websites, links to websites with which you are affiliated (whether as a link in article text, or a citation in an article), and links that attract visitors to a website or promote a product. See the external links guideline and spam guideline for further explanations. Because Wikipedia uses the nofollow attribute value, its external links are disregarded by most search engines. If you feel the link should be added to the page, please discuss it on the associated talk page rather than re-adding it. See WP:Refspam. Neøn (talk) 06:08, 31 July 2015 (UTC)