nghiên cứu ứng dụng chitosan nhằm hạn chế sự biến đổi chất lượng và hao hụt trọng lượng trong sản xuất sản phẩm tôm he chân trắng đông IQF

! " # ! " $

/1 5 6

" " " 0 < =

> ( "4? @A = B> B C "; D% E 3 F , 1 ! " "4? @A-" "G H " " " * I '

> J%K "C "P Q 70 ,+ %1 ,2 "L )R'

> S"T " # $% "+ B % "% " L "U + V " # $% W0 )0 E L

G I% - + "%1 6 U NF X /%( ! " "3 " + I '

9K6 ) M AN+ / => AF O9K6 ) O9:O )9 P Q>

e'Y' q D `[ V W _V •[ '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''c•e'e' SW‚kV SW S V W _V •[''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''cYe'e'Y' S"4< F"(F 8 A%''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''cYe'e'e' S"4< F"(F F" ƒ " "„ "G , ( ; " ( "… #% '''''''''''''''''''''''''''''''''cYe'e'h' }† K )* +% "3 " + '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''cee'e'c' B< Q " # $% @3 - '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''ce

e'e'y' B< Q 7* ƒ "ƒ " + j /%( ''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''che'e'‡' * ƒ "ƒ " + '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''cc

j , ) " ,1 j )* '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''yhh'c'e' s " "4f & "O 70 /%0 , Q P " ) )3 7

j & ''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''y“h'c'h' s " "4f & "O 70 /%0 , Q P " ) )3 7

j & ''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''ygh'c'c' s " "4f & "O 70 /%0 , Q P " ) )3 7

j & ” ) ''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''‡•h'c'y' s " "4f & "O 70 /%0 , Q P " ) )3 7

j & ''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''‡eh'c'‡' s " "4f & "O 70 /%0 , Q P " ) )3 7

w’V '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''‡“

82 9 7 : D5 )

Y' 0 Y'Y= B0 46 , ( ; % # " ? '''''''''''''''''''''''''''''''''''''''' ce' 0 Y'e= B0 46 ( % "ƒ " # " ? ''''''''''''''''''''''''''''''''' yh' 0 Y'h= " " F"C " ( "G & P )* '''''''''''''''''''''''''''''''''''''''''' ‡c' 0 Y'c= B0 46 % "› " ™ f " % bR '''''''''''''''''''''''''''''''''' gy' 0 Y'y= B0 46 , ( ; %8 -"{% & + V ''''''''''''''''''''''''''''' —

‡' 0 h'Y= m /%0 F" ƒ " )3 7 j '''''''''''''''''''''''''''''''''''''''' yg

g' 0 h'h= " F"ƒ )< 7P % # ,1 +% H "N Y- "› " ™ ''''''' '“—

—' 0 h'c= ƒ " )< 7P " +% /%0 L -" )† @œ @% @; " " ) YUy•) % c "( 70 /%0 ''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' g•

82 9 7 : 9E 9 AF 3G +9H

Y' W! " Y'Y= 8% L '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''‡e' W! " Y'e= ( ; %8 -"{% L " ) ,? „ "% '''''''''''''''''''''''''—h' W! " Y'h= "$ 8% L & " ) '''''''''''''''''''''''''''''''''''''''''''''''''''''''''''ecc' W! " h'Y= m /%0 " # $% "2 @T 0 " "4f P FW & @% @; "

" ) "8 46 0 /% & "› " ™ '''''''''''''''''''''''''''''''''''cgy' W! " h'e= s " "4f & Q P " ) , "O 70 /%0 )3 7 j "8 46 0 /% & "› " ™ '''''''''''''''''''''''''''''''''''''yY

"8 46 " "& )0 4? ' + )† @œ ( "8 F"œ ,A T C "4

3 F"( U " % < )f -" "G U , "3 E " I% " + "L ? " "

"& )0 + V ' W1% /%0 & ! " L # E "H " + , C% , i 2Y——yU " I% -"( " " E F" ,I ! " L " % "œ G 46 U -"

N "8 46 , „ "8 L L " "4 " 7P U 4? U \ >\ 7< , i " ' + "L "< T „ 0 - L "4 "!U " "dF " ,

-"{% "%z )0 7; " + "L " I% +% [B @ " 7; Q G , % ƒ & "&)0 L " + V 7; )œ 0 # "; 4O " ? hy¡U ‡•¡'

C% , -"( # -" & )0 F"{ 7; "L F"{ 8F "8 46 )¦ 0 (

" " )0 F"{ ž ,? )3 " "œ -"* 46 )0 F"{ /%( ! " 70 /%0)¦ " + "L 8 ? 6 "%1 ( @ " " +F # 8 C " # $%

I " " " „ "H " # $% $ @œ ( < ,; )0 %8 - "

@ "U ( ; 6 "%1 : "4 % ƒ "8 46 )0 F"{ "& )0 "( @ " " +F "& )0 4? ' 0 /% < 70 ,I K & 4O #%

@ž ,I "8 46 , ,+ ) " "3 F"{ "%z )0 f 4? '

l "O H " + L U ( @ " " +F 4? : "4 # " ? E)† @œ " I% L "„ "8 U "8 F"œ "¢ 0 /% ( ,8 I ,I "L "

);< /+ , (

"( ! " 4< •,ž 7 H F"ƒ bR D "–' "› " ™ F"7* "& % f ,ž 4? ,› 7O F"ƒ "( ! " 4< 5 7 H F"ƒ ™ S# % 7 H F"ƒ V b#" U Ÿ 7 + F" 7* 1F % f ,ž 7 H ,› 7O &

" " F"C " ( "G & F"œ "%P , U "O ( " 7™ ,,ž % U " " F"C " ( "G & P )* Y•¡U Yh¡U hy¡ 46 "

( " # $% ,I Ÿ H ) " "G , F" L & "› " ™ "

.% & " "œ 4? f " % bR' "i 2 Y——gU f " % bR „ Ye /%*

% "› " ™ U " )0 46 & "N -" 0 "< —•• )0 46

C U 46 "%C " ( , % " I% L ( 4? " % "4 "(

D U > > #> > U % J%* , ,ž E " "j D ' bP )* ; F"4< f % J%* E "› " ™ * 46 "ƒ " " " " "› %

"& % 7* ® F"œ ,œ " "I % " L '

"! •) % )N–U T f " % bRU "› " ™ )* P ‡•¡' B0 46 % f

" % bR "4 ) %=

( Ÿ " "! L " " F"C ? U "ž , -" " 8

%8 -"{% + V ' V"i ( ; œ "HU 46 "H " + @4? 7 H% Q ) %=

e••Y

e••e

e••h

e••c

e••y

"8F @A " I% -"( " " , „ ( %8 -"{% "< ) ,? P )* 4? -"(-"% ,3 '

I < 8% Ÿ " %8 -"{% " "8 U % "4 4? %8 -"{%

"ž U£' H @L ( Ÿ " %8 -"{% & 4? U " + U "› " ™ E 46 "%C " ( , % L 4? U 74? C% " - /%0 8 -"0 /% '

W + U "› " ™ f 4? 46 %8 -"{% "& % ) "; 4O V"1

%8 -"{%' ? "i 4% H ,I ( " "U -ƒ " X U Q I%U "8 46

"%P ' V„ )3 3 "G " C% & " I% † " L /%* ' "› @37( " "8 U , + "› " ™ " " )N "* © " "; 4O #% "œV"1 0 I% " „ "H 0 ' V2 e••‡U 46 "1F -"{% "› "

0 ( @œ & , -"%{

B % -" " U \ S , ( "6F "8 „ # /% 7; F" 0 @4?( @œ & ( › š › P ) "' B3 F" 0 \ S " " @› ) › @ F" )F" ›

•\ S–U @› ) › F" )F" › •\bS–U ) › F" )F" › • bS–U ) ›

\bS

\ S

\ S

± —' m" T )* U "+ › š „ ( @œ F" 0 "$ 2 ' B % -"

" U "N ,A F œ " L P , F" 0 ( "8 < "H U "4OF" 0 F › ' /%( ! " F" 0 ( "8 U 8% N < "; ( "4O 7

W + 46 7 ¥ %8 " + -" 7; 7 "8 U 4< "* " Ÿ -"4< 7; " + U F N ,? U - I " Ÿ 46%£'' < " 7 ¥ f "4) %=

V4? " F"C < "H "%z )0 U -" 0 g••' L Q L &4? "3 F"{ „ 0 " "4f 8 ? ? /%( ! " " 7 , 70 /%0 "3F"{ ' %9 "› $ P # - & 4? "& )0 U 4O F" 7 + "

V4? 3 @ 4? Q L f L "( 3 @ U -" # - ,? < "8 -"(, „ „ ! " "8 C "4 4? "4O U „ " 46 ( "8 -"( U , < ,

"i% <U Ÿ f • , ) f C Y•• U @ª ( " -"¥ ( 7¢ F"4<F"(F < "G " "4O ' V4? 3 @ 46 " " " h L ) %=

"$ @% H -"% " ( ( "8 /% " " 7 ' m" ( " 4? % @ž( dF " "4O -" dF 46 C F"0 „ ( "N L " , Ÿ 7 + U %-" )¦ F"( ,X 8% N '

V4? 3 @ > 8% N = 4? "% H P 3 @ /% ( M "* & L 8%

N ' „U ( " L 4? 3 @ 8% N 46 7¢ ( "N "4O '

V4? @ƒ " 4? = ?F 4? @ƒ " )( # 7I Ÿ & % # +% ) % -" †

L 7¢ 4? )L "' D?F 4? : „ 0 " "4f /%( ! " " 7 "%z)0 "4 F"< -" U L "U U£ , /%( ! " ( ; " G 46 "%z)0 '

V.% / ° >h• ³ >g• U " "H ( )¦ 8 " I% , "% ª •Y• ± Y••µ –V.% / µ >g• U "8 ¥ f @L "%z " "H

& )3 F" 7* " "H ( „ )3 " L /% "G -"( " %' V.% -ƒ " "4?

& " "H ( "¥ , Q I% "! % )™ & )0 F"{ C * % )™ 7C% & „' V.% -ƒ " "4? " "H ? U )™ , -" Q I% "! " )0F"{ „ % œ , )A "< Y¡U e—¡U hy¡'

"< ) ,? -"% ,3 "4 - "' m" „U 4? 8% N "3 F"{ )¦

@; " "% H U 5 "i ,; ƒ -"„ - " "i ,; ƒ @ª - " "< Y¡U Yc¡U hy¡' m" 72 U H F"œ "Q L "( & )0 F"{ U P F"C 4? )¦

"N f L ,; ƒ 7 C% & "N F"C ? )¦ 7; "0 5 ( " "H ( ,

" ( " "œ G 46 & )0 F"{ ' V.% " "U $ P

" "œ G 46 & )0 F"{ )¦ "8F "< "1 ' V U )3 84? & )0 F"{ T @ )3 7* "< 4? ' W + 46 T %9 "%P , (

-" -"ƒ , I% - + ,1 " " ( ' + 7 „ )0 F"{ -" )¦ -"™F"œ F"C " + 46 U % " # U % 7 „ -" "Ÿ U G 46 )0F"{ ,A 7; " "œ @ )3 7* "< 7I Ÿ 7# ?F 7 „ ,A @ ª '

/%( ! " L " U „ )3 7 j ( " " F"C " ( "G "4

"& % )3 7 ƒ " F › U 7 j % @U ( , , "8 -" ( '

/%( ! " „ )3 7 ƒ " F › ' l -" 0 " + P >Y³ >

y U F › 7; 7 ƒ " Ÿ 7 + š 7; - & ' l I% - + 7! " "4O U (F" † F › " % - "6F ,? F" † 4? f L "( @% @; "' m"4? - "U "N ( " -"¥ # - ,? F › " F › 7; " j ,I

Ÿ 8% N U F › "% H ,I L "( ,„ , - & Y¡U Yg¡U hy¡' V"4,1 U )3 7 ƒ " F › " F"œ "%P , $ P ( " 4? /%( ! "- "' V.% "O L " -d @ "! F › 7; 7 ƒ "U "O

72 & 4? ( " ,X 7 , ) " ,1 U )3 7 ƒ " F › & % #) " "8 ' B* T L )* )„ )¦ "% H , L "( -" " L P @ -" 4?

„ 72 /%( ! " j "8 -" "3 " + 46 '

7I Ÿ " "H ( ,? (F )%8 # F"C & "< 4? -" -"ƒ F N

% /% " ' B3 "2 " )¦ @ ª L " -" „ @T " + "1F 5, -" U " + P -" -" j ; "U P { -" "8F , * P -"-"ƒ -" ? '

/%( ! " i U * P 7 j "„ "G & )0 F"{ 7; -! "E 8

" I% @ 4? „ 72 C " , " + P 8 "8F' ! ,1 ( 7 j "„ "G

"4 F"0 $ "„ "„ "G & F @ 0 ,? * P "8F'

V"i 7 j "& % & )0 F"{ "i 7 j @ ( @œ & (

L › š › „ -"0 2 ";% 46 L "' V"4 F"C 4? E „ U " + P "8F-! "E 8 L " "4 -" "8 @$ 46 " L P & › š › @ ,1 @ž

* ,? U % F"C ,¥ "( L " )¦ 7 %U # ,¥ %8 " + "i * ™

B3 8 4? "( L " @ ª "4 )3 "2 " & ( " "H ( • "4

E ! " 7 f # –' B3 "2 " & ( " "H ( L ( ?F *F M LI% - + " -" -"ƒ "1F , )0 F"{ # "i 7 j -"

"%1 "; " ,I ž U ,;U % )™ U L "( , ( ƒ " "8 -"( & )0 F"{ 'W1% /%0 )0 F"{ 7; -" ( U @ U % 8%U 8 ž ,; "< -" 8%

H ( " 46 " + 46 C „ 7 + F"(F ( " )0 F"{ ,? 4O -" -"ƒ % /% "U i " + P , P { -" -"ƒ -" j ; "U

; " ƒ " " ) '

, ?* ? = @% @; " " ) „ "H " "Q " 7P H "Q ,0 'V„ „ ( @œ )6 < 7I U ; U 7„ ®FU * ; " "! " U ";% 46 @ ,

( " -" "G "%P m" 46 > L "G ^ 46 S' WQ "ƒ b " E

" ) Y—¡U cg¡U ‡•¡'

"* " ª ž U "* 8 4? U 2 -"0 2 ( L @ , Ÿ 7 + -" ,.

"4< " -" H L )® Y“¡U ‡•¡'

, + ; 7¥ U - /%0 " "8 U " ) „ ( @œ ½ ) " › • "/% " 46 " @ F – " " , L "'

7 " "%* "* 7d F"! , I% ; -"?F 5 ,¥ E " " ' bP "„( " -" "G & + E " # $%U )0 %8 e )0 F"{ "%* " š

"i 7d F"! , %) , "% # Ÿ ; " ( " ( -"?F' 0 " )0 F"{ "%*

"( ‡ 2 e••y' B % "< " "( 4% " "U "! e L "%* E 46

0 4O #% @ž „ "1 , ( " ( -"( Y“¡U y‡¡U ‡•¡'

"& )0 > + " # $% 4O "%z )0 eU£ „U ( - /%0 7*

YU••–, G 46 F" † •h•U—•U , Ye• - – , + 70 /%0 ( "Q cc¡'

" ) P F"4< F"(F „ " +% /%0 H @% ! "8 46 & ( "% -" E

bP " # $% 4< 3 & DÁ F›š> 7 › , P )3 •e••y– : " ¢ -" )† @œ 7 " ) * ,? )0 F"{ "0 ( % : -! "E)3 "4 "¥ & )0 F"{ y•¡' V U -" "# 7P " ) , "0 ( L F"$

"6F " ) > › 2 P @¬ @ U P ; , "L /%( ! " "4 "¥ & )0F"{ '

V"! "% U " ) „ -"0 2 -"( -"%{ L " "< -"( 8 • )

@ ( ( 0 e••e–' V"i " # $% C ,I " L P -"( L , ) " ,1

& " ) , ( › & "N E F"( " + ¢ U " ) „ -"0 2

"L " )3 F"( H , ) " ,1 " +% /%0 "< ( › •[ " @ , P )3Y—g—¹ ¼› , P )3 e••Y–' V U ( " # $% I% " "1 ¢ U " +% /%0-"( , ) " ,1 & " ) , ( › & "N F"œ "%P , G

7 " @ ›U F › U "8 7d U ( -" ( U , U %* , ( " " F"C -"( –, " I% " " F"C „ 4< ( ,? " ) , 0 " Ÿ 2 " L

P -"( L , ) " ,1 & " ) ' C U ›, › "› › , P )3 •e••c– E

" # $% " I% ,I 0 " "4f & ( " " F"C "3 F"{ -"( " % " +%/%0 -"( ,), & " ) • "4 " 7P U F › U @C%U %* –' ( " # $% "

" % •ch - U ° —c•¹ ••U •U••y• , •U•Y•– , "# , 5 " " F"C

"3 F"{ = " 7P •••UY•Uh••–U @; " F › & )i •••U Y•UY••–U @C% "4?

@4< •••U Y•U Y••– , %* •••U•Uy•Ue•–' m /%0U " 7P U F › & )i U

" # $% & › U › , Â ›) •Y——g– •U•g Y•>h³hYU•“ Y•>hU Ve ••'•eg

-" U @ U " ) " )0 46 • 6 "%1 – 2 5 —UY>eeU“• ) ,? A%

-HU 46 ) )( " ,? ( A% * "$ • L 72 72 4? " -" U @e• , A% -" L 72 – yy¡U ‡•¡'

I " +% /%0 "* " ( F U ( ( 0 E 7¢ F"4< F"(F &D› •Y—“y– " "8 U A% L 72 " ) Y• YUh "8F "< " I% ) ,? (

, % "' V " # $% & • " % " , P )3 •Y——YU Y——e – ,I 0 "

"4f & @% @; " " ) •Y•U YUy• " @% @; " @ W •UeyV– "8 46 , /%( ! " "4 "¥ & " 4< 70 /%0 f Yh ' "› - /%0

/%K • " › , " %e••‡¹ " › , P )3 e••“ –U •m % e••Y¹ " ›

@œ 0 * P " "8F , )0 F"{ › " › ›U "L " 46 )3 "4 "¥ & %/%0U „ -"0 2 -"( -"%{ Ÿ 7 + ,? 8 * U ,! ,1 U i 4< (

"4 ) %=