Boputsoa bo manganga
Glucose ke motsoako oa lik'hemik'hale o ajoang haholo lefatšeng la lintho tse phelang. Ho hakanngoa hore limela li hlahisa lithane tse ka bang limilione tse likete tse 100 tsa eona ka selemo ka photosynthesis!
Limolek'hule tsa glucose le tsona ke karolo ea metsoako e mengata, joalo ka sucrose, starch, cellulose. Glucose ka tharollo ea metsi e ka sebopeho sa selikalikoe (li-isomers tse peli tse fapaneng ka tlhophiso) ka motsoako o monyane oa sebopeho sa ketane. Mefuta e 'meli ea mehele e fetoloa ka mokhoa oa ketane - ketsahalo ena e bitsoa phetoho (ho tloha lat. Fetola = fetoha).
Boemong ba tekano, likahare tsa mefuta eohle ea molek'hule ea tsoekere ke tse latelang (bakeng sa ho hlaka, liathomo tsa khabone tse nang le palo e tsamaellanang ea liathomo tsa haedrojene li siiloe mateanong a li-bond):
Likahare tse tlase tsa mofuta oa ketane li baka karabelo e ikhethang ea tsoekere (kamora ho sebelisoa, e khutlisoa ho tsoa mefuteng ea mehele), mohlala, liteko tsa Trommer le Tollens. Empa tsena hase tsona feela lintho tse mebala-bala tse amang motsoako ona.
Tekong re tla sebelisa tsoekere, sodium hydroxide, NaOH le dae e putsoa ea methylene (senepe 1), e sebelisitsoeng, har'a lintho tse ling, e le ho lokisetsa aquarium. Kenya tharollo ea NaOH (senepe 2) ea mahloriso a tšoanang le marotholi a seng makae a dae (senepe 3). Lintho tse ka har'a botlolo li fetoha boputsoa (senepe 4), empa e nyamela kapele (foto 5 le 6). Ka mor'a ho sisinyeha, tharollo e fetoha e putsoa hape (foto 7 le 8), ebe o fetoha mmala hape ka mora nakwana. Mokhoa ona o ka phetoa ka makhetlo a 'maloa.
E etsahala nakong ea teko oxidation ea tsoekere ho gluconic acid (sehlopha sa aldehyde sa mofuta oa ketane -CHO e fetoha sehlopha sa carboxyl -COOH), ka ho toba, ka letsoai la sodium ea acid ena, e entsoeng ka mokhoa o matla oa alkaline reaction medium. Glucose oxidation e hlahisoa ke methylene blue, mofuta oa oxidized o oxidized ho tloha ka mokhoa o fokolitsoeng (leukoprinciples, gr. leukemia = bosoeu), bo fapane ka 'mala:
Ts'ebetso ea hona joale e ka hlalosoa ka tsela e latelang:
mofuta oa tsoekere + oxidized oa dae ® gluconic acid + mofuta o fokolitsoeng oa dae
Boitšoaro bo ka holimo bo ikarabella bakeng sa ho nyamela ha 'mala o moputsoa oa tharollo. Ka mor'a ho sisinya lintho tse ka har'a botlolo, oksijene e qhibilihang ka metsing moeeng e ntša oxidize mofuta o fokotsehileng oa dae, ka lebaka leo 'mala o moputsoa o hlahang hape. Ts'ebetso e phetoa ho fihlela glucose e felile. Kahoo, methylene blue e sebetsa e le sesosa sa karabelo.
Shebella boiphihlelo videong:
