Review

66 KKU Science Journal Volume 39 Number 1 Review
√à“ß°“¬¡πÿ…¬å°àÕπ∂Ÿ°‡ª≈’ˬπ‡ªìπ°ä“´§“√å∫Õπ‰¥ÕÕ°‰´¥å
·≈–πÈ”‚¥¬°“√ºà“π«—Ø®—°√°√¥´‘∑√‘° (citric acid
cycle) ¢≥–°√¥·≈§µ‘°π‘¥¥’´÷Ë߇ªìπº≈‘µ¿—≥±å∑’ˇ°‘¥¢÷Èπ
®“°°“√ ≈“¬µ—«¢ÕßæÕ≈‘¥’·Õ≈-·≈§µ‘°·Õ´‘¥ ·≈–
æÕ≈‘¥’-·≈§µ‘°·Õ´‘¥ ®–∂Ÿ°°”®—¥ÕÕ°®“°√à“ß°“¬‚¥¬
µ√ß∑“ßªí “«– (Yuehuei, 2000) °“√ ≈“¬µ—«®–‡°‘¥
¢÷Èπ„π à«π∑’ˇªìπÕ —≥∞“π°àÕπ à«π∑’ˇªìπº≈÷°¢Õß
æÕ≈‘·≈§µ‘°·Õ´‘¥ (Cai et al., 1996) ´÷Ë߬◊π¬—π‰¥â
®“°°“√∑’ËæÕ≈‘·Õ≈-·≈§µ‘°·Õ´‘¥¡’√–¥—∫§«“¡‡ªìπ
º≈÷°‡æ‘Ë¡¡“°¢÷Èπ ‡¡◊ËÕ√–¬–‡«≈“„π°“√ ≈“¬µ—«¡“°¢÷Èπ
(Cam et al., 1995) ‚¥¬Õ—µ√“°“√ ≈“¬µ—«¢Õß
æÕ≈‘·≈§µ‘°·Õ´‘¥®–·ª√º°º—π°—∫πÈ”Àπ—°‚¡‡≈°ÿ≈
·≈–√–¥—∫§«“¡‡ªìπº≈÷°¢ÕßæÕ≈‘·≈§µ‘°·Õ´‘¥ (Li
et al., 1990) ¥—ßπ—ÈπæÕ≈‘¥’·Õ≈-·≈§µ‘°·Õ´‘¥®– ≈“¬
µ—«‰¥â‡√Á«°«à“æÕ≈‘·Õ≈-·≈§µ‘°·Õ´‘¥ ·≈–æÕ≈‘¥’-·≈§µ‘°
·Õ´‘¥ ‚¥¬æƒµ‘°√√¡°“√ ≈“¬µ—«¢ÕßæÕ≈‘ ·≈§µ‘°
·Õ´‘¥ “¡“√∂«‘‡§√“–À剥⮓° ¡∫—µ‘µà“ßÊ ∑’ˇª≈’ˬπ-
·ª≈߉ª ‰¥â·°à πÈ”Àπ—°∑’ËÀ“¬‰ª (weight loss)
πÈ”Àπ—°‚¡‡≈°ÿ≈ (molecular weight) °“√°√–®“¬¢Õß
πÈ”Àπ—°‚¡‡≈°ÿ≈ (molecular weight distribution)
—≥∞“π«‘∑¬“¢Õßæ◊Èπº‘« (surface morphology) ¡∫—µ‘
∑“ߧ«“¡√âÕπ (thermal properties) √–¥—∫§«“¡‡ªìπ
º≈÷° (degree of crystallinity) ·≈–°“√ª≈¥ª≈àÕ¬
‚Õ≈‘‚°‡¡Õ√å∑’ˇ°‘¥®“°°“√ ≈“¬µ—«ÕÕ° Ÿà ‘Ëß·«¥≈âÕ¡
‡ªìπµâπ (Huang et al., 2004)
CH CH
O
3
O
3
O
O
O
O
CH 3 CH
O
3
O
n
+ H 2 O
CH CH
O
3
O
3
O
O
OH + HO
O
CH 3 CH
O
3
O
CH 3
O
H 2 O H 2 O H 2 O
HO
OH
lactic acid
√Ÿª∑’Ë 14 °“√ ≈“¬µ—«∑“ß’«¿“æ‚¥¬°√–∫«π°“√‰Œ‚¥√‰≈´’ ·∫∫ ÿà¡¢ÕßæÕ≈‘·≈§‰∑¥å (Maharana et al., 2009)