• Reduce text
  • Restore text size
  • Increase the text
  • Print

Detecting enzymatic activity: a test in full colour…

A patented device for the detection of enzymatic activity has been developed.  It is based on the colours specific to the nanometric scale in biopolymer films.  Rapid, simple and sensitive, this test could be miniaturised to enable its inclusion in high-throughout screening systems for applications in metagenomics, white biotechnologies, etc.

détection d'activité enzymatique. © inra
Updated on 04/22/2013
Published on 04/12/2013

The principle of the test: the use of colour without staining
Although most of the colours we observe in nature are linked to the presence of coloured pigments in different objects, others only exist through a particular organisation of matter and its interaction with light.  These are referred to as "structural colours".  This is notably the case of the feathers of certain parrots, or the wings of butterflies or beetles, etc.  
Scientists in the Research Unit on Biopolymers – Interactions and Assemblies (BIA) have exploited these structural colours in biopolymer films at a nanometric scale to develop a patented detector for enzymatic activity. They applied biopolymer films about 100 nanometres thick on a reflective substrate (silicon), knowing that at thicknesses between 70 and 200 nm a colour would appear due to interference phenomena. Some of the incident rays are reflected onto the air/film interface, while the remainder are transmitted through the layer and reflected off the second film/substrate interface.  Because the reflected rays have different optical pathways, they are in phase shift and interfere with each other, causing the appearance of a colour.  When the thickness of the film changes (for example, if it is placed in contact with an enzyme capable of degrading the biopolymer), the colour is modulated.

Rapid, simple and sensitive detection
The first step in this test thus consists in applying the nanocomponents in successive coats so as to closely control the thickness of the layers and hence the colour, and to modulate the sensitivity of the device.  The film is then placed in contact with the test solution for a few minutes, after which it is rinsed and dried.  Immediately, and without the need for reading apparatus, the verdict is clear: if the colour is modified, enzymatic activity has indeed occurred.  
Another not inconsiderable advantage of this method is its sensitivity.  Compared with a standard colorimetric technique, the detector thus developed is 50 times more sensitive in the case of cellulose/xyloglucan layers and up to 200 times more sensitive with other biopolymers tested (pectins, xylans, proteins, etc.).

Towards new, high-throughput screening tests 
The aim is now to work in collaboration with teams specialised in microsystems in order to develop miniaturisation of the devices and their inclusion in 96-well test plates, the format most frequently used for the automated screening of genomic databanks and compatible with all commercial systems.  Use of this method will enable the rapid and sensitive screening of the numerous cell banks that are growing up, notably because of the development of metagenomics and the challenges linked to white biotechnologies.

Contact(s)
Scientific contact(s):

Associated Division(s):
Attribute Type Value
node_id string 101371
parent_node_id string 232
main_node_id string 101371
contentobject_id string 94833
contentobject_version string 76
contentobject_is_published string 1
depth string 3
sort_field string 1
sort_order string 1
priority string 1
modified_subnode string 1511276009
path_string string '/1/2/232/101371/'
path_identification_string string 'sitedept/deptunite23'
remote_id string 'c26c322a977694c26e49bd0a5862eada'
is_hidden string 0
is_invisible string 0
name string 'Science for Food and Bioproduct Engineering'
data_map array Array(33)
>seo object[eZContentObjectAttribute] Object
>title object[eZContentObjectAttribute] Object
>bloc_xml_introduction object[eZContentObjectAttribute] Object
>bloc_xml_presentation object[eZContentObjectAttribute] Object
>shortchapo object[eZContentObjectAttribute] Object
>zoom_news object[eZContentObjectAttribute] Object
>url object[eZContentObjectAttribute] Object
>mail_contact object[eZContentObjectAttribute] Object
>contact object[eZContentObjectAttribute] Object
>address object[eZContentObjectAttribute] Object
>robots object[eZContentObjectAttribute] Object
>metadescription object[eZContentObjectAttribute] Object
>centercode object[eZContentObjectAttribute] Object
>pathprefix object[eZContentObjectAttribute] Object
>display_twitterbar object[eZContentObjectAttribute] Object
>url_communitylink1 object[eZContentObjectAttribute] Object
>logo_communitylink1 object[eZContentObjectAttribute] Object
>url_communitylink2 object[eZContentObjectAttribute] Object
>logo_communitylink2 object[eZContentObjectAttribute] Object
>url_communitylink3 object[eZContentObjectAttribute] Object
>logo_communitylink3 object[eZContentObjectAttribute] Object
>url_communitylink4 object[eZContentObjectAttribute] Object
>logo_communitylink4 object[eZContentObjectAttribute] Object
>bloc_edito_intro object[eZContentObjectAttribute] Object
>bloc_edito_presentation object[eZContentObjectAttribute] Object
>jobdisplay object[eZContentObjectAttribute] Object
>visual object[eZContentObjectAttribute] Object
>credits object[eZContentObjectAttribute] Object
>mentions object[eZContentObjectAttribute] Object
>arborh object[eZContentObjectAttribute] Object
>extranet_link object[eZContentObjectAttribute] Object
>jobteaser object[eZContentObjectAttribute] Object
>urlteaser object[eZContentObjectAttribute] Object
object object[eZContentObject] Object
>id string 94833
>section_id string 1
>owner_id string 14
>contentclass_id string 50
>name string 'Science for Food and Bioproduct Engineering'
>published string 1358170199
>modified string 1507642404
>current_version string 76
>status string 1
>remote_id string 'c620494800b25e79a632d8080941f9c6'
>language_mask string 6
>initial_language_id string 2
>current object[eZContentObjectVersion] Object
>versions array Array(10)
>author_array array Array(2)
>class_name string 'Département : Site'
>content_class object[eZContentClass] Object
>contentobject_attributes array Array(33)
>owner object[eZContentObject] Object
>related_contentobject_array array Array(0)
>related_contentobject_count string 0
>reverse_related_contentobject_array array Array(0)
>reverse_related_contentobject_count string 1
>linked_contentobject_array array Array(0)
>linked_contentobject_count string 0
>reverse_linked_contentobject_array array Array(0)
>reverse_linked_contentobject_count string 1
>embedded_contentobject_array array Array(0)
>embedded_contentobject_count string 0
>reverse_embedded_contentobject_array array Array(0)
>reverse_embedded_contentobject_count string 0
>can_read boolean true
>can_pdf boolean true
>can_diff boolean false
>can_create boolean false
>can_create_class_list array Array(0)
>can_edit boolean false
>can_translate boolean false
>can_remove boolean false
>can_move boolean false
>can_move_from boolean false
>can_view_embed boolean false
>data_map array Array(33)
>grouped_data_map array Array(1)
>main_parent_node_id string 232
>assigned_nodes array Array(1)
>parent_nodes array Array(1)
>main_node_id string 101371
>main_node object[eZContentObjectTreeNode] Object
>default_language string 'eng-GB'
>content_action_list boolean false
>class_identifier string 'inra_departement'
>class_group_id_list array Array(1)
>match_ingroup_id_list boolean false
>current_language string 'eng-GB'
>current_language_object object[eZContentLanguage] Object
>initial_language object[eZContentLanguage] Object
>initial_language_code string 'fre-FR'
>available_languages array Array(1)
>language_codes array Array(1)
>language_js_array string '[{"locale":"eng-GB","name":"English (United Kingdom)"}]'
>languages array Array(1)
>all_languages array Array(2)
>can_edit_languages array Array(0)
>can_create_languages array Array(0)
>always_available integer 0
>allowed_assign_section_list array Array(1)
>allowed_assign_state_id_list array Array(1)
>allowed_assign_state_list array Array(0)
>state_id_array array Array(1)
>state_identifier_array array Array(1)
subtree array Array(145)
>0 object[eZContentObjectTreeNode] Object
>1 object[eZContentObjectTreeNode] Object
>2 object[eZContentObjectTreeNode] Object
>3 object[eZContentObjectTreeNode] Object
>4 object[eZContentObjectTreeNode] Object
>5 object[eZContentObjectTreeNode] Object
>6 object[eZContentObjectTreeNode] Object
>7 object[eZContentObjectTreeNode] Object
>8 object[eZContentObjectTreeNode] Object
>9 object[eZContentObjectTreeNode] Object
>10 object[eZContentObjectTreeNode] Object
>11 object[eZContentObjectTreeNode] Object
>12 object[eZContentObjectTreeNode] Object
>13 object[eZContentObjectTreeNode] Object
>14 object[eZContentObjectTreeNode] Object
>15 object[eZContentObjectTreeNode] Object
>16 object[eZContentObjectTreeNode] Object
>17 object[eZContentObjectTreeNode] Object
>18 object[eZContentObjectTreeNode] Object
>19 object[eZContentObjectTreeNode] Object
>20 object[eZContentObjectTreeNode] Object
>21 object[eZContentObjectTreeNode] Object
>22 object[eZContentObjectTreeNode] Object
>23 object[eZContentObjectTreeNode] Object
>24 object[eZContentObjectTreeNode] Object
>25 object[eZContentObjectTreeNode] Object
>26 object[eZContentObjectTreeNode] Object
>27 object[eZContentObjectTreeNode] Object
>28 object[eZContentObjectTreeNode] Object
>29 object[eZContentObjectTreeNode] Object
>30 object[eZContentObjectTreeNode] Object
>31 object[eZContentObjectTreeNode] Object
>32 object[eZContentObjectTreeNode] Object
>33 object[eZContentObjectTreeNode] Object
>34 object[eZContentObjectTreeNode] Object
>35 object[eZContentObjectTreeNode] Object
>36 object[eZContentObjectTreeNode] Object
>37 object[eZContentObjectTreeNode] Object
>38 object[eZContentObjectTreeNode] Object
>39 object[eZContentObjectTreeNode] Object
>40 object[eZContentObjectTreeNode] Object
>41 object[eZContentObjectTreeNode] Object
>42 object[eZContentObjectTreeNode] Object
>43 object[eZContentObjectTreeNode] Object
>44 object[eZContentObjectTreeNode] Object
>45 object[eZContentObjectTreeNode] Object
>46 object[eZContentObjectTreeNode] Object
>47 object[eZContentObjectTreeNode] Object
>48 object[eZContentObjectTreeNode] Object
>49 object[eZContentObjectTreeNode] Object
>50 object[eZContentObjectTreeNode] Object
>51 object[eZContentObjectTreeNode] Object
>52 object[eZContentObjectTreeNode] Object
>53 object[eZContentObjectTreeNode] Object
>54 object[eZContentObjectTreeNode] Object
>55 object[eZContentObjectTreeNode] Object
>56 object[eZContentObjectTreeNode] Object
>57 object[eZContentObjectTreeNode] Object
>58 object[eZContentObjectTreeNode] Object
>59 object[eZContentObjectTreeNode] Object
>60 object[eZContentObjectTreeNode] Object
>61 object[eZContentObjectTreeNode] Object
>62 object[eZContentObjectTreeNode] Object
>63 object[eZContentObjectTreeNode] Object
>64 object[eZContentObjectTreeNode] Object
>65 object[eZContentObjectTreeNode] Object
>66 object[eZContentObjectTreeNode] Object
>67 object[eZContentObjectTreeNode] Object
>68 object[eZContentObjectTreeNode] Object
>69 object[eZContentObjectTreeNode] Object
>70 object[eZContentObjectTreeNode] Object
>71 object[eZContentObjectTreeNode] Object
>72 object[eZContentObjectTreeNode] Object
>73 object[eZContentObjectTreeNode] Object
>74 object[eZContentObjectTreeNode] Object
>75 object[eZContentObjectTreeNode] Object
>76 object[eZContentObjectTreeNode] Object
>77 object[eZContentObjectTreeNode] Object
>78 object[eZContentObjectTreeNode] Object
>79 object[eZContentObjectTreeNode] Object
>80 object[eZContentObjectTreeNode] Object
>81 object[eZContentObjectTreeNode] Object
>82 object[eZContentObjectTreeNode] Object
>83 object[eZContentObjectTreeNode] Object
>84 object[eZContentObjectTreeNode] Object
>85 object[eZContentObjectTreeNode] Object
>86 object[eZContentObjectTreeNode] Object
>87 object[eZContentObjectTreeNode] Object
>88 object[eZContentObjectTreeNode] Object
>89 object[eZContentObjectTreeNode] Object
>90 object[eZContentObjectTreeNode] Object
>91 object[eZContentObjectTreeNode] Object
>92 object[eZContentObjectTreeNode] Object
>93 object[eZContentObjectTreeNode] Object
>94 object[eZContentObjectTreeNode] Object
>95 object[eZContentObjectTreeNode] Object
>96 object[eZContentObjectTreeNode] Object
>97 object[eZContentObjectTreeNode] Object
>98 object[eZContentObjectTreeNode] Object
>99 object[eZContentObjectTreeNode] Object
>100 object[eZContentObjectTreeNode] Object
>101 object[eZContentObjectTreeNode] Object
>102 object[eZContentObjectTreeNode] Object
>103 object[eZContentObjectTreeNode] Object
>104 object[eZContentObjectTreeNode] Object
>105 object[eZContentObjectTreeNode] Object
>106 object[eZContentObjectTreeNode] Object
>107 object[eZContentObjectTreeNode] Object
>108 object[eZContentObjectTreeNode] Object
>109 object[eZContentObjectTreeNode] Object
>110 object[eZContentObjectTreeNode] Object
>111 object[eZContentObjectTreeNode] Object
>112 object[eZContentObjectTreeNode] Object
>113 object[eZContentObjectTreeNode] Object
>114 object[eZContentObjectTreeNode] Object
>115 object[eZContentObjectTreeNode] Object
>116 object[eZContentObjectTreeNode] Object
>117 object[eZContentObjectTreeNode] Object
>118 object[eZContentObjectTreeNode] Object
>119 object[eZContentObjectTreeNode] Object
>120 object[eZContentObjectTreeNode] Object
>121 object[eZContentObjectTreeNode] Object
>122 object[eZContentObjectTreeNode] Object
>123 object[eZContentObjectTreeNode] Object
>124 object[eZContentObjectTreeNode] Object
>125 object[eZContentObjectTreeNode] Object
>126 object[eZContentObjectTreeNode] Object
>127 object[eZContentObjectTreeNode] Object
>128 object[eZContentObjectTreeNode] Object
>129 object[eZContentObjectTreeNode] Object
>130 object[eZContentObjectTreeNode] Object
>131 object[eZContentObjectTreeNode] Object
>132 object[eZContentObjectTreeNode] Object
>133 object[eZContentObjectTreeNode] Object
>134 object[eZContentObjectTreeNode] Object
>135 object[eZContentObjectTreeNode] Object
>136 object[eZContentObjectTreeNode] Object
>137 object[eZContentObjectTreeNode] Object
>138 object[eZContentObjectTreeNode] Object
>139 object[eZContentObjectTreeNode] Object
>140 object[eZContentObjectTreeNode] Object
>141 object[eZContentObjectTreeNode] Object
>142 object[eZContentObjectTreeNode] Object
>143 object[eZContentObjectTreeNode] Object
>144 object[eZContentObjectTreeNode] Object
children array Array(9)
>0 object[eZContentObjectTreeNode] Object
>1 object[eZContentObjectTreeNode] Object
>2 object[eZContentObjectTreeNode] Object
>3 object[eZContentObjectTreeNode] Object
>4 object[eZContentObjectTreeNode] Object
>5 object[eZContentObjectTreeNode] Object
>6 object[eZContentObjectTreeNode] Object
>7 object[eZContentObjectTreeNode] Object
>8 object[eZContentObjectTreeNode] Object
children_count string 9
view_count integer 0
contentobject_version_object object[eZContentObjectVersion] Object
>id string 448043
>contentobject_id string 94833
>creator_id string 111629
>version string 76
>status string 1
>created string 1507641776
>modified string 1507642402
>workflow_event_pos string 0
>user_id string 0
>language_mask string 7
>initial_language_id string 4
>creator object[eZContentObject] Object
>name string 'Caractérisation et élaboration des produits issus de l’agriculture'
>version_name string 'Science for Food and Bioproduct Engineering'
>main_parent_node_id string 232
>contentobject_attributes array Array(33)
>related_contentobject_array array Array(0)
>reverse_related_object_list array Array(0)
>parent_nodes array Array(1)
>can_read boolean false
>can_remove boolean false
>data_map array Array(33)
>node_assignments array Array(1)
>contentobject object[eZContentObject] Object
>initial_language object[eZContentLanguage] Object
>language_list array Array(2)
>translation boolean false
>translation_list array Array(2)
>complete_translation_list array Array(2)
>temp_main_node object[eZContentObjectTreeNode] Object
sort_array array Array(1)
>0 array Array(2)
can_read boolean true
can_pdf boolean true
can_create boolean false
can_edit boolean false
can_hide boolean false
can_remove boolean false
can_move boolean false
can_move_from boolean false
can_add_location boolean false
can_remove_location boolean false
can_view_embed boolean false
is_main boolean true
creator object[eZContentObject] Object
>id string 111629
>section_id string 2
>owner_id string 2339
>contentclass_id string 4
>name string 'Manchado-Sarni Pascale'
>published string 1362733294
>modified string 1479294604
>current_version string 2
>status string 1
>remote_id string '2c2834c1f7ce86b973f0aa1a579ed87e'
>language_mask string 3
>initial_language_id string 2
>current object[eZContentObjectVersion] Object
>versions array Array(2)
>author_array array Array(2)
>class_name string 'User'
>content_class object[eZContentClass] Object
>contentobject_attributes array Array(5)
>owner object[eZContentObject] Object
>related_contentobject_array array Array(0)
>related_contentobject_count string 0
>reverse_related_contentobject_array array Array(0)
>reverse_related_contentobject_count string 0
>linked_contentobject_array array Array(0)
>linked_contentobject_count string 0
>reverse_linked_contentobject_array array Array(0)
>reverse_linked_contentobject_count string 0
>embedded_contentobject_array array Array(0)
>embedded_contentobject_count string 0
>reverse_embedded_contentobject_array array Array(0)
>reverse_embedded_contentobject_count string 0
>can_read boolean false
>can_pdf boolean false
>can_diff boolean false
>can_create boolean false
>can_create_class_list array Array(0)
>can_edit boolean false
>can_translate boolean false
>can_remove boolean false
>can_move boolean false
>can_move_from boolean false
>can_view_embed boolean false
>data_map array Array(5)
>grouped_data_map array Array(1)
>main_parent_node_id string 312
>assigned_nodes array Array(2)
>parent_nodes array Array(2)
>main_node_id string 118313
>main_node object[eZContentObjectTreeNode] Object
>default_language string 'eng-GB'
>content_action_list boolean false
>class_identifier string 'user'
>class_group_id_list array Array(1)
>match_ingroup_id_list boolean false
>current_language string 'fre-FR'
>current_language_object object[eZContentLanguage] Object
>initial_language object[eZContentLanguage] Object
>initial_language_code string 'fre-FR'
>available_languages array Array(0)
>language_codes array Array(0)
>language_js_array boolean false
>languages array Array(0)
>all_languages array Array(1)
>can_edit_languages array Array(0)
>can_create_languages array Array(0)
>always_available integer 1
>allowed_assign_section_list array Array(1)
>allowed_assign_state_id_list array Array(1)
>allowed_assign_state_list array Array(0)
>state_id_array array Array(1)
>state_identifier_array array Array(1)
path_with_names string 'sitedept/deptunite23'
path array Array(2)
>0 object[eZContentObjectTreeNode] Object
>1 object[eZContentObjectTreeNode] Object
path_array array Array(4)
>0 integer 1
>1 integer 2
>2 integer 232
>3 integer 101371
parent object[eZContentObjectTreeNode] Object
>node_id string 232
>parent_node_id string 2
>main_node_id string 232
>contentobject_id string 219
>contentobject_version string 64
>contentobject_is_published string 1
>depth string 2
>sort_field string 9
>sort_order string 1
>priority string 2
>modified_subnode string 1511429961
>path_string string '/1/2/232/'
>path_identification_string string 'sitedept'
>remote_id string '702cee6c5bb3a0f2459eb4705cbf71aa'
>is_hidden string 0
>is_invisible string 0
>name string 'INRA Divisions'
>data_map array Array(23)
>object object[eZContentObject] Object
>subtree array Array(833)
>children array Array(17)
>children_count string 17
>view_count integer 0
>contentobject_version_object object[eZContentObjectVersion] Object
>sort_array array Array(1)
>can_read boolean true
>can_pdf boolean true
>can_create boolean false
>can_edit boolean false
>can_hide boolean false
>can_remove boolean false
>can_move boolean false
>can_move_from boolean false
>can_add_location boolean false
>can_remove_location boolean false
>can_view_embed boolean false
>is_main boolean true
>creator object[eZContentObject] Object
>path_with_names string 'sitedept'
>path array Array(1)
>path_array array Array(3)
>parent object[eZContentObjectTreeNode] Object
>url string 'sitedept'
>url_alias string 'sitedept'
>class_identifier string 'inra_site_departements'
>class_name string 'Départements : Dispatch'
>hidden_invisible_string string '-/-'
>hidden_status_string string 'Visible'
>classes_js_array string '[{"classID":57,"name":"Actualit\u00e9"},{"classID":131,"name":"Annuaire : Rubrique"},{"classID":16,"name":"Article"},{"classID":17,"name":"Article (main-page)"},{"classID":18,"name":"Article (sub-page)"},{"classID":42,"name":"Banner"},{"classID":19,"name":"Blog"},{"classID":81,"name":"Blog : Billet"},{"classID":101,"name":"Blog : Billet marque blanche"},{"classID":62,"name":"Blog : Blog"},{"classID":99,"name":"Blog : Blog marque blanche"},{"classID":82,"name":"Blog : Rubrique additionnelle"},{"classID":20,"name":"Blog post"},{"classID":127,"name":"Br\u00e8ve"},{"classID":60,"name":"Carrousel : Actu de carrousel"},{"classID":143,"name":"Carrousel : Diapositive autonome"},{"classID":168,"name":"Carrousels"},{"classID":56,"name":"Centre : Site"},{"classID":94,"name":"Centres : Dispatch"},{"classID":13,"name":"Comment"},{"classID":50,"name":"D\u00e9partement : Site"},{"classID":95,"name":"D\u00e9partements : Dispatch"},{"classID":71,"name":"Digital Asset (Media)"},{"classID":24,"name":"Documentation page"},{"classID":154,"name":"Dossier"},{"classID":116,"name":"Dossier 'Parutions'"},{"classID":76,"name":"Dossier 'Quizs'"},{"classID":169,"name":"Dossier actu secondaire"},{"classID":89,"name":"Ev\u00e9nement"},{"classID":88,"name":"Ev\u00e9nements : Racine"},{"classID":40,"name":"Event"},{"classID":41,"name":"Event calendar"},{"classID":22,"name":"Feedback form"},{"classID":28,"name":"File"},{"classID":29,"name":"Flash"},{"classID":1,"name":"Folder"},{"classID":37,"name":"Forum"},{"classID":39,"name":"Forum reply"},{"classID":38,"name":"Forum topic"},{"classID":43,"name":"Forums"},{"classID":23,"name":"Frontpage"},{"classID":35,"name":"Gallery"},{"classID":36,"name":"Geo Article"},{"classID":145,"name":"Glossaire : Mot"},{"classID":30,"name":"Image"},{"classID":25,"name":"Infobox"},{"classID":130,"name":"Instit : Fiche Annuaire"},{"classID":140,"name":"Instit : Nous trouver"},{"classID":48,"name":"Instit : Racine"},{"classID":133,"name":"Instit : Rubrique 'Actu'"},{"classID":139,"name":"Instit : Th\u00e8me 'Annuaire'"},{"classID":134,"name":"Instit : Th\u00e8me 'Missions'"},{"classID":137,"name":"Instit : Th\u00e8me 'Organisation'"},{"classID":135,"name":"Instit : Th\u00e8me 'Rep\u00e8res'"},{"classID":136,"name":"Instit : Th\u00e8me 'Strat\u00e9gie'"},{"classID":46,"name":"Kiosque : Racine"},{"classID":31,"name":"Link"},{"classID":201,"name":"Logo"},{"classID":72,"name":"Magazine"},{"classID":142,"name":"Mediath\u00e8que : Mot cl\u00e9"},{"classID":149,"name":"Mediath\u00e8que : Playlist"},{"classID":52,"name":"Mediath\u00e8que : Racine"},{"classID":150,"name":"Mediath\u00e8que : Rubrique 'Mots cl\u00e9s'"},{"classID":148,"name":"Mediath\u00e8que : Rubrique 'Playlist'"},{"classID":141,"name":"Mediath\u00e8que : Rubrique 'Zoom'"},{"classID":199,"name":"Mediath\u00e8que : Rubrique simple"},{"classID":121,"name":"M\u00e9taprogramme : Site"},{"classID":96,"name":"M\u00e9taprogrammes : Dispatch"},{"classID":161,"name":"Mon Compte"},{"classID":124,"name":"Mon Compte : Utilisateur Front"},{"classID":26,"name":"Multicalendar"},{"classID":119,"name":"Newsletter : Abonn\u00e9"},{"classID":104,"name":"Newsletter : Bloc s\u00e9l\u00e9ction"},{"classID":105,"name":"Newsletter : Bloc texte"},{"classID":103,"name":"Newsletter : Campagne simple"},{"classID":102,"name":"Newsletter : Campagne sp\u00e9ciale"},{"classID":120,"name":"Newsletter : Dossier 'Abonn\u00e9s'"},{"classID":122,"name":"Newsletter : Dossier 'D\u00e9sinscrits'"},{"classID":125,"name":"Newsletter : Dossier 'Entreprises'"},{"classID":126,"name":"Newsletter : Entreprise"},{"classID":100,"name":"Newsletter : Newsletter"},{"classID":92,"name":"Parution"},{"classID":27,"name":"Poll"},{"classID":47,"name":"Portail : Canal"},{"classID":45,"name":"Portail : Racine"},{"classID":53,"name":"Portail : Th\u00e8me"},{"classID":185,"name":"Portrait"},{"classID":163,"name":"Portrait Old"},{"classID":87,"name":"Presse : Accueil public"},{"classID":108,"name":"Presse : Biographie"},{"classID":91,"name":"Presse : Communiqu\u00e9"},{"classID":118,"name":"Presse : Dossier 'Biographies'"},{"classID":112,"name":"Presse : Dossier 'Communiqu\u00e9s'"},{"classID":115,"name":"Presse : Dossier 'Dossiers de presse'"},{"classID":203,"name":"Presse : Dossier 'Kits de presse'"},{"classID":107,"name":"Presse : Dossier de presse"},{"classID":63,"name":"Presse : Inscription"},{"classID":205,"name":"Presse : Kit de presse"},{"classID":51,"name":"Presse : Racine"},{"classID":21,"name":"Product"},{"classID":32,"name":"Quicktime"},{"classID":73,"name":"Quiz : Accueil"},{"classID":74,"name":"Quiz : Question"},{"classID":195,"name":"Quiz : question - r\u00e9ponse"},{"classID":75,"name":"Quiz : R\u00e9ponse"},{"classID":69,"name":"Racine"},{"classID":34,"name":"Real video"},{"classID":179,"name":"RH : Annonce permanente"},{"classID":176,"name":"RH : Annonce temporaire"},{"classID":181,"name":"RH : Article simple"},{"classID":172,"name":"RH : Campagne permanente"},{"classID":180,"name":"RH : Campagne temporaire"},{"classID":207,"name":"RH : Connexion Espagnole"},{"classID":187,"name":"RH : Discipline scientifique"},{"classID":193,"name":"RH : Domaine professionnel"},{"classID":165,"name":"RH : dossier 'Portraits'"},{"classID":177,"name":"RH : Dossier Reportages"},{"classID":183,"name":"RH : Fichier description"},{"classID":184,"name":"RH : Fichier inscription"},{"classID":178,"name":"RH : Folder annonces"},{"classID":197,"name":"RH : mobilit\u00e9 internationale"},{"classID":171,"name":"RH : Proc\u00e9dure"},{"classID":49,"name":"RH : Racine"},{"classID":175,"name":"RH : R\u00e9gion"},{"classID":167,"name":"RH : Rubrique"},{"classID":164,"name":"RH : Rubrique 'Actu'"},{"classID":170,"name":"RH : Rubrique emploi"},{"classID":174,"name":"RH : textes candidatures"},{"classID":189,"name":"RH : Type d'annonce"},{"classID":191,"name":"RH : Type nature de contrat"},{"classID":106,"name":"RSS : Flux"},{"classID":129,"name":"Rubrique texte simple"},{"classID":146,"name":"SEO : Robots txt"},{"classID":147,"name":"SEO : Sitemap xml"},{"classID":151,"name":"SEO : Valeurs par d\u00e9faut"},{"classID":44,"name":"Silverlight"},{"classID":166,"name":"Sites : Rubrique"},{"classID":33,"name":"Windows media"},{"classID":182,"name":"Xiti : Identifiants Home"}]'
>is_container string 1
url string 'sitedept/deptunite23'
url_alias string 'sitedept/deptunite23'
class_identifier string 'inra_departement'
class_name string 'Département : Site'
hidden_invisible_string string '-/-'
hidden_status_string string 'Visible'
classes_js_array string '[{"classID":57,"name":"Actualit\u00e9"},{"classID":131,"name":"Annuaire : Rubrique"},{"classID":16,"name":"Article"},{"classID":17,"name":"Article (main-page)"},{"classID":18,"name":"Article (sub-page)"},{"classID":42,"name":"Banner"},{"classID":19,"name":"Blog"},{"classID":81,"name":"Blog : Billet"},{"classID":101,"name":"Blog : Billet marque blanche"},{"classID":62,"name":"Blog : Blog"},{"classID":99,"name":"Blog : Blog marque blanche"},{"classID":82,"name":"Blog : Rubrique additionnelle"},{"classID":20,"name":"Blog post"},{"classID":127,"name":"Br\u00e8ve"},{"classID":60,"name":"Carrousel : Actu de carrousel"},{"classID":143,"name":"Carrousel : Diapositive autonome"},{"classID":168,"name":"Carrousels"},{"classID":56,"name":"Centre : Site"},{"classID":94,"name":"Centres : Dispatch"},{"classID":13,"name":"Comment"},{"classID":50,"name":"D\u00e9partement : Site"},{"classID":95,"name":"D\u00e9partements : Dispatch"},{"classID":71,"name":"Digital Asset (Media)"},{"classID":24,"name":"Documentation page"},{"classID":154,"name":"Dossier"},{"classID":116,"name":"Dossier 'Parutions'"},{"classID":76,"name":"Dossier 'Quizs'"},{"classID":169,"name":"Dossier actu secondaire"},{"classID":89,"name":"Ev\u00e9nement"},{"classID":88,"name":"Ev\u00e9nements : Racine"},{"classID":40,"name":"Event"},{"classID":41,"name":"Event calendar"},{"classID":22,"name":"Feedback form"},{"classID":28,"name":"File"},{"classID":29,"name":"Flash"},{"classID":1,"name":"Folder"},{"classID":37,"name":"Forum"},{"classID":39,"name":"Forum reply"},{"classID":38,"name":"Forum topic"},{"classID":43,"name":"Forums"},{"classID":23,"name":"Frontpage"},{"classID":35,"name":"Gallery"},{"classID":36,"name":"Geo Article"},{"classID":145,"name":"Glossaire : Mot"},{"classID":30,"name":"Image"},{"classID":25,"name":"Infobox"},{"classID":130,"name":"Instit : Fiche Annuaire"},{"classID":140,"name":"Instit : Nous trouver"},{"classID":48,"name":"Instit : Racine"},{"classID":133,"name":"Instit : Rubrique 'Actu'"},{"classID":139,"name":"Instit : Th\u00e8me 'Annuaire'"},{"classID":134,"name":"Instit : Th\u00e8me 'Missions'"},{"classID":137,"name":"Instit : Th\u00e8me 'Organisation'"},{"classID":135,"name":"Instit : Th\u00e8me 'Rep\u00e8res'"},{"classID":136,"name":"Instit : Th\u00e8me 'Strat\u00e9gie'"},{"classID":46,"name":"Kiosque : Racine"},{"classID":31,"name":"Link"},{"classID":201,"name":"Logo"},{"classID":72,"name":"Magazine"},{"classID":142,"name":"Mediath\u00e8que : Mot cl\u00e9"},{"classID":149,"name":"Mediath\u00e8que : Playlist"},{"classID":52,"name":"Mediath\u00e8que : Racine"},{"classID":150,"name":"Mediath\u00e8que : Rubrique 'Mots cl\u00e9s'"},{"classID":148,"name":"Mediath\u00e8que : Rubrique 'Playlist'"},{"classID":141,"name":"Mediath\u00e8que : Rubrique 'Zoom'"},{"classID":199,"name":"Mediath\u00e8que : Rubrique simple"},{"classID":121,"name":"M\u00e9taprogramme : Site"},{"classID":96,"name":"M\u00e9taprogrammes : Dispatch"},{"classID":161,"name":"Mon Compte"},{"classID":124,"name":"Mon Compte : Utilisateur Front"},{"classID":26,"name":"Multicalendar"},{"classID":119,"name":"Newsletter : Abonn\u00e9"},{"classID":104,"name":"Newsletter : Bloc s\u00e9l\u00e9ction"},{"classID":105,"name":"Newsletter : Bloc texte"},{"classID":103,"name":"Newsletter : Campagne simple"},{"classID":102,"name":"Newsletter : Campagne sp\u00e9ciale"},{"classID":120,"name":"Newsletter : Dossier 'Abonn\u00e9s'"},{"classID":122,"name":"Newsletter : Dossier 'D\u00e9sinscrits'"},{"classID":125,"name":"Newsletter : Dossier 'Entreprises'"},{"classID":126,"name":"Newsletter : Entreprise"},{"classID":100,"name":"Newsletter : Newsletter"},{"classID":92,"name":"Parution"},{"classID":27,"name":"Poll"},{"classID":47,"name":"Portail : Canal"},{"classID":45,"name":"Portail : Racine"},{"classID":53,"name":"Portail : Th\u00e8me"},{"classID":185,"name":"Portrait"},{"classID":163,"name":"Portrait Old"},{"classID":87,"name":"Presse : Accueil public"},{"classID":108,"name":"Presse : Biographie"},{"classID":91,"name":"Presse : Communiqu\u00e9"},{"classID":118,"name":"Presse : Dossier 'Biographies'"},{"classID":112,"name":"Presse : Dossier 'Communiqu\u00e9s'"},{"classID":115,"name":"Presse : Dossier 'Dossiers de presse'"},{"classID":203,"name":"Presse : Dossier 'Kits de presse'"},{"classID":107,"name":"Presse : Dossier de presse"},{"classID":63,"name":"Presse : Inscription"},{"classID":205,"name":"Presse : Kit de presse"},{"classID":51,"name":"Presse : Racine"},{"classID":21,"name":"Product"},{"classID":32,"name":"Quicktime"},{"classID":73,"name":"Quiz : Accueil"},{"classID":74,"name":"Quiz : Question"},{"classID":195,"name":"Quiz : question - r\u00e9ponse"},{"classID":75,"name":"Quiz : R\u00e9ponse"},{"classID":69,"name":"Racine"},{"classID":34,"name":"Real video"},{"classID":179,"name":"RH : Annonce permanente"},{"classID":176,"name":"RH : Annonce temporaire"},{"classID":181,"name":"RH : Article simple"},{"classID":172,"name":"RH : Campagne permanente"},{"classID":180,"name":"RH : Campagne temporaire"},{"classID":207,"name":"RH : Connexion Espagnole"},{"classID":187,"name":"RH : Discipline scientifique"},{"classID":193,"name":"RH : Domaine professionnel"},{"classID":165,"name":"RH : dossier 'Portraits'"},{"classID":177,"name":"RH : Dossier Reportages"},{"classID":183,"name":"RH : Fichier description"},{"classID":184,"name":"RH : Fichier inscription"},{"classID":178,"name":"RH : Folder annonces"},{"classID":197,"name":"RH : mobilit\u00e9 internationale"},{"classID":171,"name":"RH : Proc\u00e9dure"},{"classID":49,"name":"RH : Racine"},{"classID":175,"name":"RH : R\u00e9gion"},{"classID":167,"name":"RH : Rubrique"},{"classID":164,"name":"RH : Rubrique 'Actu'"},{"classID":170,"name":"RH : Rubrique emploi"},{"classID":174,"name":"RH : textes candidatures"},{"classID":189,"name":"RH : Type d'annonce"},{"classID":191,"name":"RH : Type nature de contrat"},{"classID":106,"name":"RSS : Flux"},{"classID":129,"name":"Rubrique texte simple"},{"classID":146,"name":"SEO : Robots txt"},{"classID":147,"name":"SEO : Sitemap xml"},{"classID":151,"name":"SEO : Valeurs par d\u00e9faut"},{"classID":44,"name":"Silverlight"},{"classID":166,"name":"Sites : Rubrique"},{"classID":33,"name":"Windows media"},{"classID":182,"name":"Xiti : Identifiants Home"}]'
is_container string 1
Science for Food and Bioproduct Engineering
Associated Centre(s):
Angers-Nantes

Find out more

Patent: Méthode de détection d’activités enzymatiques hydrolytiques sans marquage à base de couches réflectives de biopolymères. Carole Cerclier, Bernard Cathala. Patent No. FR 1055529 dated 7 July 2010
This device is the subject of an ANR programme which started in 2011-2012 under the acronym of Reflex. It involves the Institut d'Electronique de Microélectronique et de Nanotechologie (IENM) in Lille, the LISBP in Toulouse (notably through the enzyme screening platform ICEO) and the INRA BIA Research Unit in Nantes (coordinator).

  • Photonic structures in biology, Vukusic, P.; Sambles, J. R. Nature, (424), (6950), 852-855, 2003.
  • Elaboration of Spin-coated Cellulose-Xyloglucan Multilayered Thin Films, Carole Cerclier, Fabrice Cousin, Hervé Bizot, Céline Moreau and Bernard Cathala, Langmuir, 26 (22), pp 17248–1725, 2010.
  • Cerclier C., Lack-Guyomard A., Moreau C., Cousin F., Beury N., Bonnin E, Jean B., Cathala B. (2011) Coloured Semi-reflective Thin Films for Biomass-hydrolyzing Enzyme Detection. Advanced Materials 23: 3791–3795
films nanométriques sont obtenus par dépôts successifs de cellulose et de xyloglucane.

On the subject of

Illustration: the nanometric films are obtained using successive coats of cellulose and xyloglucan. The growth of the film is linear, depending on the number of applications (n) and a colour appears after a few cycles.  The layers are subjected to the action of cellulase solutions endowed with different enzymatic activities.  After incubation for a few minutes, followed by washing and drying, the colour of the film is modified or disappears totally.