EFICIENTA EXTRACTULUI APOS DE MIMOSA ASUPRA UNOR SPECII DIN GHANA MAI PUTIN UTILIZATE

Akwasi ASAMOAH
PhD Research Student - Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
Tel: 00233 51 60375. Fax: 00233 51 60375
E-mail: asamoah38@yahoo.com

Gifty ACQUAH
Teaching Assistant - Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
E-mail: gecquah@yahoo.com

Kwasi FRIMPONG-MENSAH
Prof.Dr. - Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
E-mail: frimpongmensah@yahoo.com

Charles ANTWI-BOASIAKO
Senior Lecturer Dr. - Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
E-mail: cantwiboas@yahoo.com

Rezumat:
Necesitatea de a utiliza specii din ce in ce mai diverse, de la cele traditionale, folosite in mod frecvent, la speciile mai putin utilizate, a fost intotdeauna o problema de interes. Din nefericie, cele mai multe dintre aceste specii nu sunt durabile, de aceea este necesara protectia lor inainte de utilizare. Cele mai multe substante de protectie se biodegradeaza foarte greu, in timp ce altele nu sunt biodegradabile reprezentand o amenintare pentru oameni, alte organisme si mediul lor de viata. Una dintre sursele de produse de protectie a lemnului care sunt biodegradabile rapid o reprezinta la ora actuala extractele pe baza de compusi organici din partile speciilor lemnoase durabile. Prin urmare, eficienta unui extract apos, produs denumit TANAC S.A Mimosa Leopard Solid Wattle, a fost testata pe doua specii din Ghana mai putin utilizate: Canarium schweinfufthii (Bediwonua) si Amphimas pterocarpoides (Yaya) conform standardului EN 252 modificat. Dupa o impregnare sub presiune cele doua specii au fost expuse in camp, in contact cu solul timp de 5 luni, fata de 5 ani cum prevede norma EN 252. Eficienta acestui extract a fost evaluata vizual prin notarea durabilitatii, pierderea procentuala de duritate si pierderea de masa a celor doua specii, dupa expunerea in cimp. Desi specia Amphimas pterocarpoides a retinut in lemn o doza mai mare de extract apos TANAC S.A Mimosa Leopard Solid Wattle, acesta nu a imbunatatit semnificativ durabilitatea speciilor Canarium schwenfurthii si Amphimas pterocarpoides. In ansamblu, se pare ca specia Amphimas pterocarpoides a fost mai durabila.

Cuvinte cheie:
biodegradabil, ecologic, protectie, pierderea procentuala de masa, pierderea procentuala a duritatii, evaluare vizuala a durabilitatii.

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