full2010.pdf - page 1307

1269
P27
„µ¦‡ª‡»¤‡»–£µ¡®¨´Š„µ¦Á„ȝÁ„¸É¥ª °ŠÁŠµ³¡´œ›»ræŠÁ¦¸ ¥œ
×¥„µ¦Á‡¨º°Ÿ·ª—oª¥Å‡Ã˜Žµœ
Maintenance Postharvest Quality on Rambutan Fruit (Nappelium lappaceum Linn.) by cv.
Rongrien by Coating of Chitosan
°—· ¦ ªµ¦¸—Š1 ¨³¤´‡¦ „oª»„Š2*
Adisorn Wareedong1and Samak Kaewsuksaeng2*
š‡´—¥n °
„µ¦«¹„¬µ‡»–£µ¡®¨´ Š„µ¦Á„ȝÁ„¸É¥ªÂ¨³„µ¦‡ª‡» ¤‡»–£µ¡®¨´Š„µ¦Á„È Á„¸É¥ª °ŠÁŠµ³¡´œ›»ræŠÁ¦¸ ¥œœ°„
§—¼„µ¨Ã—¥„µ¦Á‡¨º °Ÿ·ª—oª¥Å‡Ã˜Žµœœ·— Medium molecular weight (MMW) š¸É ‡ªµ¤Á o¤ oœ¦o°¥¨³ 0.5 ¨³ 1.0
Áž°¦rÁŽÈœ˜r Á„ȝ¦´ „¬µš¸É°»–®£¼¤· 13 °Š«µÁŽ¨ÁŽ¸¥‡ªµ¤ºÊ œ´¤¡´ š›r¦o°¥¨³ 95 ¡ªn µŸ¨ÁŠµ³š¸ÉÁ‡¨º°Ÿ·ª—oª¥Å‡Ã˜
Žµœœ·— MMW µ¤µ¦™³¨°„µ¦Áž¨¸É¥œÂž¨Š®¨´Š„µ¦Á„ȝÁ„¸É ¥ªÅ—o„n „µ¦¼Á¸¥œÊ宜´„ ž¦· ¤µ–„¦—š´ÊŠ®¤—š¸É
ŘÁ˜¦šÅ—o ž¦·¤µ– °ŠÂ È Šš´ÊŠ®¤—š¸É¨³¨µ¥œÊεŗo ‡ªµ¤ÂœnœÁœºÊ ° „µ¦Á„·—¸œÊÎ µ˜µ¨ °Š œÂ¨³„µ¦Á„·—¸œÊÎ µ˜µ¨ °Š
Áž¨º°„ÁŠµ³Å—o—¸š¸É „ªnµÁ¤ºÉ°Áž¦¸¥Áš¸¥„´» —‡ª‡»¤ ×¥Ÿ¨ÁŠµ³Äœ»—‡ª‡» ¤Â¨³Á‡¨º°Ÿ·ª—oª¥Å‡Ã˜Žµœœ·—
MMW š¸É‡ªµ¤Á o¤ oœ¦o°¥¨³ 0.5 ¨³ 1.0 Áž°¦rÁŽÈœ˜r ¤¸°µ¥»„µ¦Á„È ¦´„¬µÁšnµ„´ 10.67 13.33 ¨³ 13.56 ª´œ
˜µ¤¨Îµ—´
‡ÎµÎµ‡´: ÁŠµ³ Ň؎µœ „µ¦Á‡¨º°Ÿ·ªÅ‡Ã˜Žµœ
Abstract
Postharvest quality control of rambutan (Nappelium lappaceum Linn.) on off-season by coating with
0.2% and 1.0% medium molecular weight (MMW) of chitosan at 13° C and 95% relative humidity was
determined. It was found that MMW of chitosan remarkably reduced weight loss, firmness, spintern browning
and changes of peel color. Consequent to the reduction of total soluble solids (TSS) and titratable acidity (TA)
was higher than control. Moreover, 1.0% and 0.5% MMW of chitosan maintained postharvest quality with the
most effective to prolong storage for 13.56 and 13.33 days respectively.
Keywords: Chitosan, Longkong, Browning, Postharvest quality
1œ· ·˜ µ µª·µÁš‡ÃœÃ¨¥¸„µ¦Á„¬˜¦ ‡–³Áš‡ÃœÃ¨¥¸Â¨³„µ¦¡´ •œµ»¤œ ¤®µª·š¥µ¨´¥š´„¬·– ¡´š¨»Š 93110
2°µ‹µ¦¥r µ µª·µÁš‡ÃœÃ¨¥¸„µ¦Á„¬˜¦ ‡–³Áš‡ÃœÃ¨¥¸Â¨³„µ¦¡´•œµ»¤œ ¤®µª·š¥µ¨´¥š´„¬·– ¡´š¨»Š 93110
* Corresponding author: Ú¦«´¡šr/Ú¦µ¦ 074-693996Email-samak@tsu.ac.th