Laser-based-technique-3D-micron-scaled-structuresBu sefer Viyana Teknoloji Üniversitesi’nden araştırmacıların bir çalışması üzerine yazıyoruz: 3 boyutlu, komplike sensörlerin, hatta biyolojik sistemlerin temelini oluşturabilecek şekilde istenen kimyasal ve biyolojik özelliklerde, mikron ölçekli yapılar. 

3D photografting olarak bilinen sistem, odaklı bir lazeri boya fırçası gibi kullanarak kimyasal sinyalleri oluşturuyor ve malzeme parçası içinde istenen bileşenlere ya da hücrelere bu sinyalleri gönderiyor. Çalışma, üniversitenin Prof Jürgen Stampfl liderliğinde malzeme bilimi bölümü ve  Prof Robert Liska liderliğinde makromoleküler kimya araştırma gruplarının işbirliğinde yürütülüyor.

 

Teknik, 3D printingle ilgili bir teknik değil, ama daha önce polimer yüzeyinde modifikasyon yapmak için kullanılan bir yöntemin gelişmiş hali. Çalışma, çok düşük yoğunluklu, açık kafes ve büyük gözenekli makromoleküler bir hidrojel ile başlamış. Bu yapıyı, aromatik azit molekülleri ile tohumlamış, sonra hidrojeli 4µm karşısından bir noktaya odaklanmış lazer ışığına maruz bırakmışlar. Işık, azit moleküllerini, bazı bileşenleri seri şekilde bağlanacağı şekilde, reaktif hale getirmiş.

Üniversitenin açıklamasından araştırmacı Aleksandr Ovsianikov, çalışmanın sonucunu ‘Tuval üzerinde belli noktalara renkleri yerleştirerek çalışan bir ressam gibi, biz de hidrojel üzerine mplekülleri yerleştirebiliyoruz, hem de yüksek hassasiyette ve 3 boyutlu olarak’ şeklinde anlatıyor. 

 

Lazer, kafes içinde kimyasal grupların yerleştirilmesi ve hücrelerin istenen pozisyonlara yerleşmesini sağlamak üzere gerekli kimyasal sinyallerin gönderilmesinde kullanılıyor ve kılcal damat gibi yapılar şeklinde büyütülebiliyor. Bu yöntemin kullanım alanlarından biri, hidrojeli bir iskele gibi kullanarak biyolojik dokuların büyümesini sağlamak olabilir.

 

Alternatif bir kullanım alanı da 3 boyutlu “chip üzerinde laboratuvar” şeklinde olabilir. Yani bileşenlerin doğru şekilde pozisyonlanması ile hidrojel, kimyasal bir sensör ya da analiz cihazı gibi kullanılabilir. Bu şekliyle de araştırmacılara göre uyuşturucu taramaları gibi alanlarda da kullanımı mümkün.

 


Adaptasyon: http://www.theengineer.co.uk/laser-based-technique-builds-3d-micron-scaled-structures/1013695.article#ixzz24wPFLElc

 

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  • SELECT `a`.`id`,`a`.`title`,`a`.`catid`,`a`.`language`, CASE WHEN CHAR_LENGTH(`a`.`alias`) != 0 THEN CONCAT_WS(':', `a`.`id`, `a`.`alias`) ELSE a.id END AS `slug`, CASE WHEN CHAR_LENGTH(`cc`.`alias`) != 0 THEN CONCAT_WS(':', `cc`.`id`, `cc`.`alias`) ELSE cc.id END AS `catslug` FROM `josdm_content` AS `a` LEFT JOIN `josdm_categories` AS `cc` ON `cc`.`id` = `a`.`catid` WHERE `a`.`catid` = :catid AND `a`.`state` = :state AND `a`.`access` IN (:preparedArray1,:preparedArray2) AND (`publish_up` IS NULL OR `publish_up` <= :nowDate1) AND (`publish_down` IS NULL OR `publish_down` >= :nowDate2) ORDER BY CASE WHEN `a`.`publish_up` IS NULL THEN `a`.`created` ELSE `a`.`publish_up` END DESC661μs2.47KBParams/plugins/content/pagenavigation/src/Extension/PageNavigation.php:205Copy
  • SELECT `c`.`id`,`c`.`asset_id`,`c`.`access`,`c`.`alias`,`c`.`checked_out`,`c`.`checked_out_time`,`c`.`created_time`,`c`.`created_user_id`,`c`.`description`,`c`.`extension`,`c`.`hits`,`c`.`language`,`c`.`level`,`c`.`lft`,`c`.`metadata`,`c`.`metadesc`,`c`.`metakey`,`c`.`modified_time`,`c`.`note`,`c`.`params`,`c`.`parent_id`,`c`.`path`,`c`.`published`,`c`.`rgt`,`c`.`title`,`c`.`modified_user_id`,`c`.`version`, CASE WHEN CHAR_LENGTH(`c`.`alias`) != 0 THEN CONCAT_WS(':', `c`.`id`, `c`.`alias`) ELSE `c`.`id` END as `slug` FROM `josdm_categories` AS `s` INNER JOIN `josdm_categories` AS `c` ON (`s`.`lft` <= `c`.`lft` AND `c`.`lft` < `s`.`rgt`) OR (`c`.`lft` < `s`.`lft` AND `s`.`rgt` < `c`.`rgt`) WHERE (`c`.`extension` = :extension OR `c`.`extension` = 'system') AND `c`.`access` IN (:preparedArray1,:preparedArray2) AND `c`.`published` = 1 AND `s`.`id` = :id ORDER BY `c`.`lft`416μs3.94KBParams/libraries/src/Categories/Categories.php:375Copy
  • SELECT `m`.`id`,`m`.`title`,`m`.`module`,`m`.`position`,`m`.`content`,`m`.`showtitle`,`m`.`params`,`mm`.`menuid` FROM `josdm_modules` AS `m` LEFT JOIN `josdm_modules_menu` AS `mm` ON `mm`.`moduleid` = `m`.`id` LEFT JOIN `josdm_extensions` AS `e` ON `e`.`element` = `m`.`module` AND `e`.`client_id` = `m`.`client_id` WHERE ( ( (`m`.`published` = 1 AND `e`.`enabled` = 1 AND `m`.`client_id` = :clientId AND `m`.`access` IN (:preparedArray1,:preparedArray2)) AND (`m`.`publish_up` IS NULL OR `m`.`publish_up` <= :publishUp)) AND (`m`.`publish_down` IS NULL OR `m`.`publish_down` >= :publishDown)) AND (`mm`.`menuid` = :itemId OR `mm`.`menuid` <= 0) ORDER BY `m`.`position`,`m`.`ordering`1ms18KBParams/libraries/src/Cache/Controller/CallbackController.php:51Copy
  • SELECT `a`.`id`,`a`.`title`,`a`.`alias`,`a`.`introtext`,`a`.`fulltext`,`a`.`checked_out`,`a`.`checked_out_time`,`a`.`catid`,`a`.`created`,`a`.`created_by`,`a`.`created_by_alias`,`a`.`modified`,`a`.`modified_by`,CASE WHEN `a`.`publish_up` IS NULL THEN `a`.`created` ELSE `a`.`publish_up` END AS `publish_up`,`a`.`publish_down`,`a`.`images`,`a`.`urls`,`a`.`attribs`,`a`.`metadata`,`a`.`metakey`,`a`.`metadesc`,`a`.`access`,`a`.`hits`,`a`.`featured`,`a`.`language`,LENGTH(`a`.`fulltext`) AS `readmore`,`a`.`ordering`,`fp`.`featured_up`,`fp`.`featured_down`,CASE WHEN `c`.`published` = 2 AND `a`.`state` > 0 THEN 2 WHEN `c`.`published` != 1 THEN 0 ELSE `a`.`state` END AS `state`,`c`.`title` AS `category_title`,`c`.`path` AS `category_route`,`c`.`access` AS `category_access`,`c`.`alias` AS `category_alias`,`c`.`language` AS `category_language`,`c`.`published`,`c`.`published` AS `parents_published`,`c`.`lft`,CASE WHEN `a`.`created_by_alias` > ' ' THEN `a`.`created_by_alias` ELSE `ua`.`name` END AS `author`,`ua`.`email` AS `author_email`,`uam`.`name` AS `modified_by_name`,`parent`.`title` AS `parent_title`,`parent`.`id` AS `parent_id`,`parent`.`path` AS `parent_route`,`parent`.`alias` AS `parent_alias`,`parent`.`language` AS `parent_language` FROM `josdm_content` AS `a` LEFT JOIN `josdm_categories` AS `c` ON `c`.`id` = `a`.`catid` LEFT JOIN `josdm_users` AS `ua` ON `ua`.`id` = `a`.`created_by` LEFT JOIN `josdm_users` AS `uam` ON `uam`.`id` = `a`.`modified_by` LEFT JOIN `josdm_categories` AS `parent` ON `parent`.`id` = `c`.`parent_id` LEFT JOIN `josdm_content_frontpage` AS `fp` ON `fp`.`content_id` = `a`.`id` WHERE `a`.`access` IN (:preparedArray1,:preparedArray2) AND `c`.`access` IN (:preparedArray3,:preparedArray4) AND `c`.`published` = 1 AND `a`.`state` = :condition AND `a`.`id` <> :articleId AND `a`.`catid` IN (:preparedArray5) AND (`a`.`publish_up` IS NULL OR `a`.`publish_up` <= :publishUp) AND (`a`.`publish_down` IS NULL OR `a`.`publish_down` >= :publishDown) ORDER BY a.ordering DESC LIMIT 5513μs39.02KBParams/libraries/src/MVC/Model/BaseDatabaseModel.php:164Copy
  • SELECT `c`.`id`,`c`.`asset_id`,`c`.`access`,`c`.`alias`,`c`.`checked_out`,`c`.`checked_out_time`,`c`.`created_time`,`c`.`created_user_id`,`c`.`description`,`c`.`extension`,`c`.`hits`,`c`.`language`,`c`.`level`,`c`.`lft`,`c`.`metadata`,`c`.`metadesc`,`c`.`metakey`,`c`.`modified_time`,`c`.`note`,`c`.`params`,`c`.`parent_id`,`c`.`path`,`c`.`published`,`c`.`rgt`,`c`.`title`,`c`.`modified_user_id`,`c`.`version`, CASE WHEN CHAR_LENGTH(`c`.`alias`) != 0 THEN CONCAT_WS(':', `c`.`id`, `c`.`alias`) ELSE `c`.`id` END as `slug` FROM `josdm_categories` AS `s` INNER JOIN `josdm_categories` AS `c` ON (`s`.`lft` <= `c`.`lft` AND `c`.`lft` < `s`.`rgt`) OR (`c`.`lft` < `s`.`lft` AND `s`.`rgt` < `c`.`rgt`) WHERE (`c`.`extension` = :extension OR `c`.`extension` = 'system') AND `c`.`access` IN (:preparedArray1,:preparedArray2) AND `c`.`published` = 1 AND `s`.`id` = :id ORDER BY `c`.`lft`394μs3.95KBParams/libraries/src/Categories/Categories.php:375Copy
  • SELECT DISTINCT a.id, a.title, a.name, a.checked_out, a.checked_out_time, a.note, a.state, a.access, a.created_time, a.created_user_id, a.ordering, a.language, a.fieldparams, a.params, a.type, a.default_value, a.context, a.group_id, a.label, a.description, a.required, a.only_use_in_subform,l.title AS language_title, l.image AS language_image,uc.name AS editor,ag.title AS access_level,ua.name AS author_name,g.title AS group_title, g.access as group_access, g.state AS group_state, g.note as group_note FROM josdm_fields AS a LEFT JOIN `josdm_languages` AS l ON l.lang_code = a.language LEFT JOIN josdm_users AS uc ON uc.id=a.checked_out LEFT JOIN josdm_viewlevels AS ag ON ag.id = a.access LEFT JOIN josdm_users AS ua ON ua.id = a.created_user_id LEFT JOIN josdm_fields_groups AS g ON g.id = a.group_id WHERE ( (`a`.`context` = :context AND `a`.`access` IN (:preparedArray1,:preparedArray2)) AND (`a`.`group_id` = 0 OR `g`.`access` IN (:preparedArray3,:preparedArray4)) AND `a`.`state` = :state) AND (`a`.`group_id` = 0 OR `g`.`state` = :gstate) AND `a`.`only_use_in_subform` = :only_use_in_subform ORDER BY a.ordering ASC560μs4.06KBParams/libraries/src/MVC/Model/BaseDatabaseModel.php:164Copy
  • SELECT `c`.`id`,`c`.`asset_id`,`c`.`access`,`c`.`alias`,`c`.`checked_out`,`c`.`checked_out_time`,`c`.`created_time`,`c`.`created_user_id`,`c`.`description`,`c`.`extension`,`c`.`hits`,`c`.`language`,`c`.`level`,`c`.`lft`,`c`.`metadata`,`c`.`metadesc`,`c`.`metakey`,`c`.`modified_time`,`c`.`note`,`c`.`params`,`c`.`parent_id`,`c`.`path`,`c`.`published`,`c`.`rgt`,`c`.`title`,`c`.`modified_user_id`,`c`.`version`, CASE WHEN CHAR_LENGTH(`c`.`alias`) != 0 THEN CONCAT_WS(':', `c`.`id`, `c`.`alias`) ELSE `c`.`id` END as `slug` FROM `josdm_categories` AS `s` INNER JOIN `josdm_categories` AS `c` ON (`s`.`lft` <= `c`.`lft` AND `c`.`lft` < `s`.`rgt`) OR (`c`.`lft` < `s`.`lft` AND `s`.`rgt` < `c`.`rgt`) WHERE (`c`.`extension` = :extension OR `c`.`extension` = 'system') AND `c`.`access` IN (:preparedArray1,:preparedArray2) AND `c`.`published` = 1 AND `s`.`id` = :id ORDER BY `c`.`lft`338μs3.95KBParams/libraries/src/Categories/Categories.php:375Copy
  • SELECT DISTINCT a.id, a.title, a.name, a.checked_out, a.checked_out_time, a.note, a.state, a.access, a.created_time, a.created_user_id, a.ordering, a.language, a.fieldparams, a.params, a.type, a.default_value, a.context, a.group_id, a.label, a.description, a.required, a.only_use_in_subform,l.title AS language_title, l.image AS language_image,uc.name AS editor,ag.title AS access_level,ua.name AS author_name,g.title AS group_title, g.access as group_access, g.state AS group_state, g.note as group_note FROM josdm_fields AS a LEFT JOIN `josdm_languages` AS l ON l.lang_code = a.language LEFT JOIN josdm_users AS uc ON uc.id=a.checked_out LEFT JOIN josdm_viewlevels AS ag ON ag.id = a.access LEFT JOIN josdm_users AS ua ON ua.id = a.created_user_id LEFT JOIN josdm_fields_groups AS g ON g.id = a.group_id LEFT JOIN `josdm_fields_categories` AS fc ON fc.field_id = a.id WHERE ( (`a`.`context` = :context AND (`fc`.`category_id` IS NULL OR `fc`.`category_id` IN (:preparedArray1,:preparedArray2,:preparedArray3,:preparedArray4,:preparedArray5)) AND `a`.`access` IN (:preparedArray6,:preparedArray7)) AND (`a`.`group_id` = 0 OR `g`.`access` IN (:preparedArray8,:preparedArray9)) AND `a`.`state` = :state) AND (`a`.`group_id` = 0 OR `g`.`state` = :gstate) AND `a`.`only_use_in_subform` = :only_use_in_subform ORDER BY a.ordering ASC451μs4.81KBParams/libraries/src/MVC/Model/BaseDatabaseModel.php:164Copy
  • SELECT `alias`,`catid` FROM josdm_content WHERE `id` = :key114μs1.37KBParams/libraries/src/Component/Router/Rules/PreprocessRules.php:123Copy
  • SELECT SUM(CASE WHEN `a`.`next_execution` <= :now THEN 1 ELSE 0 END) AS due_count,SUM(CASE WHEN `a`.`locked` IS NULL THEN 0 ELSE 1 END) AS locked_count FROM `josdm_scheduler_tasks` AS `a` WHERE `a`.`state` = 1179μs1.37KBParams/administrator/components/com_scheduler/src/Model/TasksModel.php:517Copy
  • SELECT `session_id` FROM `josdm_session` WHERE `session_id` = ?101μs3.5KBParams/libraries/vendor/joomla/session/src/Handler/DatabaseHandler.php:277Copy
  • UPDATE `josdm_session` SET `data` = ? , `time` = ? WHERE `session_id` = ?275μs592BParams/libraries/vendor/joomla/session/src/Handler/DatabaseHandler.php:301Copy