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\hypersetup{pdftitle={Biodegradable Film from Wild Taro (\textit{Colocasia esculenta} (L.) Schott) Starch},pdfauthor={Alma De Leon, Joel Juvinal, Andres Tuates Jr., Monaliza Briones, Princess Jasmin, BEEJAY PAJARILLAGA},pdfsubject={Tropentag 2016: Abstract},pdfkeywords={Biodegradable film, environment	, glycerol, wild taro starch},pdfpagemode=None,colorlinks=true}
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\parbox[b]{13.4cm}{\centering \large{\textbf{Tropentag, September 18-21, 2016, Vienna, Austria}}\\[1ex] \Large{``Solidarity in a competing world ---\\fair use of resources''\\[2ex]}}
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\begin{center}
\Large{\textbf{Biodegradable Film from Wild Taro (\textit{Colocasia esculenta} (L.) Schott) Starch\footnote{\textbf{Contact Address:} Alma De Leon, Central Luzon State University, Dept. of Food Science and Technology, College of Home Science and Industry Clsu, 3120~Science City of Munoz, Philippines, \mbox{e-mail}: \email{almadeleon444@hotmail.com}}\\[0.8ex]}}
\normalsize{\textsc{Alma De Leon, Joel Juvinal, Andres Tuates Jr., Monaliza Briones, Princess Jasmin, BEEJAY PAJARILLAGA}}
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\begin{itemize*}
\item[]{\small{\textit{Central Luzon State University, Dept. of Food Science and Technology, Philippines}}}
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\index[author]{De Leon, Alma}
\index[author]{Juvinal, Joel}
\index[author]{Tuates Jr., Andres}
\index[author]{Briones, Monaliza}
\index[author]{Jasmin, Princess}
\index[author]{PAJARILLAGA, BEEJAY}
\begin{center}
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\textbf{Abstract}
\begin{abstract}
\normalsize{
An explosion of interest in recent years on the production of biodegradable films as packaging materials was triggered by ever increasing awareness of the public for environmental conservation and sustainability. One challenge that needs to be hurdled is the competition against food use of the raw materials (e.g. starch from maize or cassava). Thus, there is a need for a starch source that has a comparable performance with conventional biodegradable films but has little value to wildlife and limited economic and gastronomic importance.







This study aimed to produce and characterise biodegradable film from (\textit{Colocasia esculenta} (L.) Schott) starch. Starch was extracted from wild taro by manual peeling, chopping, grinding, filtering, settling and sun drying. Biodegradable films were produced from factorial combinations of 5g and 10g of taro starch with \mbox{2\,\%}, \mbox{3\,\%}, and \mbox{4\,\%}  glycerol. 







Results showed that taro films prepared with high level of starch and high level of glycerol (10g starch with \mbox{4\,\%} glycerol) had highest maximum stress (MPa) which is 9.51 MPa and thus considered the strongest sample. On the other hand, lower level of starch and lower level of glycerol (5g starch with \mbox{2\,\%} glycerol) had highest percent elongation and flexibility. At high level of plasticizer, the films elongation capacity increased while tensile strength decreased. The two factors (level of starch and level of glycerol) had significant positive effect ($p < 0.05$) on density, water absorption and thickness swelling. One of the treatment (T6) was examined positive for biodegradability after one week in the soil inoculated with Trichoderma harzianum. Therefore, wild taro is a good source of starch that can be used together with glycerol in the production of biodegradable films.



}

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\end{abstract}
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\noindent \textbf{Keywords:} Biodegradable film, environment	, glycerol, wild taro starch
\index[key]{Biodegradable film}
\index[key]{Environment	}
\index[key]{Glycerol}
\index[key]{Wild taro starch}
\end{document}
