cncb thỊt & thỦy sẢn - 15 tiet - 09dtp
TRANSCRIPT
CNCB THT & THY SN
Nguyn Th Thu H Khoa Cng ngh Thc phm Trng H K thut Cng ngh
Chng 3
CNCB CC SN PHM THT & THY SNOctober 11 Nguyn Th Thu H - HUTECH 2
3.1 Ch bin nh tng tht
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1. H nh tng Phn loi Du/nc Nc/du
Kch thc: 0.1m
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S n nh h nh tng
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Cht nh ha
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2. Nh tng tht H rn/lng Kch thc 1.0 m
Bt nho
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October 11
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HLB = 14October 11 Nguyn Th Thu H - HUTECH 9
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2. Nh tng thtPha lin tc Nc Mui, phosphat, ng, hng liu Protein t c ha tan
Pha gin on
Huyn ph -Protein t do ca mng tng c; -Nhng on si tht -M lin kt -Tinh bt, gia v -T bo cht bo Nh tng - Cht bo t do - Ht m - protein Bt khNguyn Th Thu H - HUTECH 11
October 11
3. Ch bin nh tng tht 2 dng sn phm Mn Th
2 giai on Giai
on 1: ct nh v ha tan protein Giai on 2: nh ha
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3. Ch bin nh tng tht 3 phng php xay/trn Xay
nc trc Xay m trc xx Bavarian Xay cng lc S dng du thay m
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3. Ch bin nh tng thtThit b Phng php gin on: cutter
Phng php lin tc ThitOctober 11
b trn + b phn nh haNguyn Th Thu H - HUTECH 14
Nguyn liu chnh
Ph gia
Th t ct & nhit ct
Thnh phn khc
Quan st
1
Nh tng da
Tht nc Cht mu Mui gia v polyphosphate
2 3 4 56
Nghin th nu tc ct chm hoc tht nhiu gn Ha tan trc Dng kh Cho vo khi tht hydrate ha mt phnLng trng trng, Thng dng ng lnh plasma, lactalbumin Cht to nh dng Cho vo trc hay cng bt, dung dch lc vi cc yu t lm t protein Nh tng cht bo
Nc/
7 8
M
9 10 Cht chng oxy ha ng Tinh btOctober 11
11 12
Acid ascorbic hay ascorbate Na (vi gluconodelta-lacton)
Nguyn Th Thu H - HUTECHKt thc 12 14o C
15
4. Cc yu t nh hng n n nh h nh tng tht
Stokes Law:
V = D2(de-di) k vis
D = ng knh cu bo de = t trng pha lin tc di = t trng pha phn tn k = khng i vis = nhtOctober 11 Nguyn Th Thu H - HUTECH 16
4. Cc yu t nh hng n n nh h nh tng tht Thc t:V = D2 vis
Kch thc ht cu bo nht
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4. Cc yu t nh hng n n nh h nh tng tht Cht lng tht
Hm lng v chc nng ca protein c Kh
nng gi nc Kh nng lin kt vi bo PSE
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4. Cc yu t nh hng n n nh h nh tng tht K thut sn xut
lng mui: ti u 4 5% frankfurter
Hm
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4. Cc yu t nh hng n n nh h nh tng tht K thut sn xut iu
khin nhit : nc lnh/
Kh nng ha tan v trng n ca protein Tng thi gian xay/trn Tng nht Tht nc + mui + nc: 0 4o C M heo: ~ 13o C M b: ~ 18o C M gia cm: ~ 7o C S dng Nit Th Thu H - HUTECH October 11 Nguyn
20
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4. Cc yu t nh hng n n nh h nh tng tht K thut sn xut Xay
trn
Ha tan & lm trng n (1-5%) protein c Ph v t bo m v phn tn cc ht cu bo vo dung dch Mc xay Tc xay, bn ca li dao, khong cch gia dao vo cho
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4. Cc yu t nh hng n n nh h nh tng tht K thut sn xut pH
Mi quan h pH WHC Trng thi trc co cng sau co cng
Phosphate
p mui
Chn
khng
Tng kh nng nh ha v n inh h nh tng Mu scOctober 11 Nguyn Th Thu H - HUTECH 24
4. Cc yu t nh hng n n nh h nh tng tht Hm lng cc ph gia Cht
nh ha Cht h tr lin kt Cht lm c
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4. Cc yu t nh hng n n nh h nh tng tht Nhi X l nhit
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Cc vn quan trng Chn nguyn liu tht (pH 5.7) & m C th s dng tht & m ng lnh
Xay th tht & m Cc ph gia h tr to nh nh mui, phosphate &
protein cho vo u qu trnh Cc ph gia kt dnh, lm c cho vo giai on sau iu khin nhit v thi gian xay C th s dng N2, nn thc hin di iu kin chn khngOctober 11 Nguyn Th Thu H - HUTECH 27
May xay tho (Mincer)
May xay tho
Truc vt cua may xay tho
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My xay nhuyn (Cutter)
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3.2. p mui 1. Mc ch- Bo qun - Ch bin
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Tc dng bo qun ca mui Vi sinh vt mt nc, rch mng t bo VSV Cl- kt hp vi protein lin kt peptid
VSV s dng c protid Oxy ha tan t VSV hiu kh b nh hng Km hm qu trnh t phn gii
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2. C ch Khuch tn:
Trong 1 phm vi nht nh, cc phn t cht tan di ng t ni c nng cao sang ni c ng thp. nh lut Fick: dQ = - DS dc/dxdtQ:lng cht KT; S:din tch KT; t: thi gian KT; dc/dx: gradien nng ; D: h s KT, D ph thuc mi trng v bn cht cht KTOctober 11 Nguyn Th Thu H - HUTECH 32
2. C ch Thm thu
Qu trnh di chuyn t ng ca dung mi phi khc phc tr lc ca mng bn thm i t dung dch c nng thp dn ni c nng cao.nh lut Van-Hp: Po = i RTC Po: p sut th thu ca dg dch; C: nng cht tan; T: nhit tuyt i; R: hng s kh l tng, i l hng s ng trng, vi NaCl i = 2; CaCl2 i = 3 October 11 Nguyn Th Thu H - HUTECH 33
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3. Phng phpA. p mui thy sn p mui nhit thng p
mui kh p mui t p mui hn hp p mui nhit thp
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p mui kh u Nhc
Kch thc nh
Hm lng m thp (< 5%)
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p mui t u Nhc
p mui hn hpOctober 11 Nguyn Th Thu H - HUTECH 37
p mui nhit thp p lnh (5-10oC) p ng (