{"id":201,"date":"2011-01-02T18:37:04","date_gmt":"2011-01-02T09:37:04","guid":{"rendered":"http:\/\/www.lookingatnothing.com\/?p=201"},"modified":"2011-01-04T17:04:32","modified_gmt":"2011-01-04T08:04:32","slug":"notes-on-guinier","status":"publish","type":"post","link":"https:\/\/lookingatnothing.com\/index.php\/archives\/201","title":{"rendered":"Notes on Guinier"},"content":{"rendered":"<p>&#8230;well, his famous SAXS analysis method.<br \/>\nThis document<a href='http:\/\/www.lookingatnothing.com\/wp-content\/uploads\/2010\/12\/Guinier_short.pdf'>Guinier_short, copyright Brian Pauw<\/a><br \/>\ngives a short description and review of the applicability of the Guinier method to polydisperse systems. <\/p>\n<p>It also shows, through analysis of simulated data, what q-range should be measured for the Guinier method to be valid. In short, the rule of qmax=1.3\/Rg still holds, but Rg in polydisperse systems is the volume-squared weighted Rg of the distribution. <\/p>\n<p>This then implies that the Guinier method for polydisperse systems quickly becomes unusable as the required qmax cannot be reached with anything but USAXS systems for polydisperse samples.<\/p>\n<p>This text (the linked PDF) is released under copyright (copyright by Brian R. Pauw, 2011) as I may want to include some of this in a later publication. I hope you understand&#8230;<\/p>\n","protected":false},"excerpt":{"rendered":"<div class=\"mh-excerpt\"><p>&#8230;well, his famous SAXS analysis method. This documentGuinier_short, copyright Brian Pauw gives a short description and review of the applicability of the Guinier method to <a class=\"mh-excerpt-more\" href=\"https:\/\/lookingatnothing.com\/index.php\/archives\/201\" title=\"Notes on Guinier\">[&#8230;]<\/a><\/p>\n<\/div>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"activitypub_content_warning":"","activitypub_content_visibility":"","activitypub_max_image_attachments":4,"activitypub_interaction_policy_quote":"anyone","activitypub_status":"","footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[1,55,54,53],"tags":[18,22,20,17,21,56,238,19,31,57],"class_list":["post-201","post","type-post","status-publish","format-standard","hentry","category-uncategorized","category-preteach","category-review","category-software-2","tag-analysis","tag-applicability","tag-code","tag-guinier","tag-polydispersity","tag-presentations","tag-review","tag-simulation","tag-software","tag-teaching"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p1gZ2v-3f","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/lookingatnothing.com\/index.php\/wp-json\/wp\/v2\/posts\/201","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lookingatnothing.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lookingatnothing.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lookingatnothing.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lookingatnothing.com\/index.php\/wp-json\/wp\/v2\/comments?post=201"}],"version-history":[{"count":6,"href":"https:\/\/lookingatnothing.com\/index.php\/wp-json\/wp\/v2\/posts\/201\/revisions"}],"predecessor-version":[{"id":285,"href":"https:\/\/lookingatnothing.com\/index.php\/wp-json\/wp\/v2\/posts\/201\/revisions\/285"}],"wp:attachment":[{"href":"https:\/\/lookingatnothing.com\/index.php\/wp-json\/wp\/v2\/media?parent=201"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lookingatnothing.com\/index.php\/wp-json\/wp\/v2\/categories?post=201"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lookingatnothing.com\/index.php\/wp-json\/wp\/v2\/tags?post=201"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}