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Ging vin hng dn: Th.s Dng Nht LinhSinh vin thc hin:

Vy Ngc Bo Trm 0853010994Bi Th Thu Hng 0853010337Nguyn Th Hng Vin 0853011087Nguyn Hong Tun Duy 0853010118Nguyn Th Thin Trang 0853010972

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I. GII THIU SN PHM Thch da l mt mn n trong sut,

dai v rt ngon.

Trong thch da c hm lng chtx cao tt cho tiu ha, cung cp nnglng v khng cha cholesterol.

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Thch da c bn cht l

polysaccharide ngoi bo nn c khnng ng dng vo nhiu lnh vckhc nhau.Nghin cu ch bin thnh nhng sn

phm ko, jelly, cc sn phm giikht.

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II. CU TRC THCH DA

L mt mng polymer sinh hc, ckh nng gi nc ln.

Thnh phn monosaccharide chnh

ca thch da l socboza nm dng L-socboza, thng cha trongvi khun ln men dch tri cy. Cng

thc cu to ca L-socboza l:CH

2OH-CO-HOCH-HCOH-HOCH-CH

2OH.

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III.THNH PHN NC DA

Da l cy thuc h Palmas, bSpadiciflorales.

Cy da thng ra hoa t nm 7 12tui sau khi trng. T th phn nkhi tri chn l 12 -13 thng. Khi chntri da nng 1.2 2 kg.

Nc da cha vitamin, khong vcc axit amin.

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IV.QUYTRNH SN XUT

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1. Chun b ging sn xut

Ging Acetobacter xylinum cnui trong mi trng thch nghing.

Cy ging, 3- 4 ngy.

Tin hnh nhn ging. Thnh phnmi trng nhn ging l mi trng

dch th. Cy ging theo t l 10%.Lc hay sc kh trong thi gian 18- 20gi. Sau ging c a vo sn

xut.

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2. Chun b mi trng Nc da gi thnh phn gm: ng,

protein,du bo, khong, vitaminhotan v mt s tp cht khc.

Dng vi lc loi b tp cht.

B sung dinh dng: SA, DAP, ngglucose, khong.

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Mi trng c thanh trng tiu

dit cc vi sinh vt. Sau lm nguicho vo acid acetic 40% , nhit 28-32C.

C 3 loi mi trng:Mi trng sn xut

Mi trng nhn gingMi trng gi ging

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3. Ln men v thu nhn thch da

Cy ging theo t l 1:10. y thau,chu bng vi mng hoc giy.

Gi nhit 28-32oC (trnh khuyng mi trng trong thi gian ).

Sau khong 7 ngy dng vt vtkhi cellulose ra khi dch ln men.

Ra khi cellulose bng nc lnh.

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V.QUY TRNH CH BIN THCH

DA

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VI. VI KHUN ACETOBACTER

Ging vi khun Acetobacterthuc hPseudomonadieae.

Phn b rng ri trong t nhin. C khong 20 loi thuc ging

Acetobacter c phn lp v mt, trong c nhiu loi c nghakinh t.

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1. c im Acetobacter

Dng hnh que, tu iu kin nui cy.

Kch thc thay i tu loi (0.3-0.6 x

1.0-8.0m). Khng sinh bo t.

Hiu kh bt buc.

Chu c acid cao.

T bo ng ring l hoc kt thnh tng

chui.

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2. Vi khun Acetobacter xylinum Acetobacter xylinum thuc: lp

Schizommycetes, b Pseudomonadales, hPseudomonadieae.

A.xylinum di khong 2m, ng ring lhoc xp thnh chui, c kh nng to vnghemicellulose kh dy, bt mu vi thuc

nhum Iod. A.xylinum sinh trng pH < 5, nhit

28-32oC v c th tch ly 4.5% acid acetic.

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A.xylinum hp th ng glucose t

mi trng nui cy. Trong t bo vikhun, glucose ny s kt hp vi acidbo to thnh mt tin cht nm trn

mng t bo. K n c thot rangoi t bo cng vi mt enzyme.

Enzyme ny c th polyme ho glucose

thnh cellulose.

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VII. DIN TIN TRONG LN MEN

Acetobacter xylinum l mt lai chu acidnn mi trng c iu chnh v pH3.5-4.

Trong 4 ngy u pH tng dn t 3.78 n3.91. Sau gim dn n ngy th 7 tht gi tr 3.35.

Nu ngun C khng c vi khun sdng ht th c th c s tch ly acid hu

c.

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VIII. BO QUN THCH DA

c ch vi khun v nm men bngcch s dng nng ng cao.

S dng mui natribenzoate: Vinng mui s dng khong 0.05 -0.1%, sn phm thch da c th gi

c phm cht ban u sau 4 thng.

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IX.CCYU T NH HNG

1. nh hng ca (NH4)2SO42. nh hng ca (NH4)2PO4

3. nh hng ca cc loi ng4. nh hng ca nng cht kh5. nh hng ca nhit

6. nh hng ca pH

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1. nh hng ca (NH4)2SO4

L nhn t quan trng cung cp ngun nitcho t bo pht trin.

Nit c mt trong nhiu thnh phn cu tonh acid nucleic, phospholipid, mt scoenzyme quan trng nh ATP, ADP,

NADP, FAD v mt s vitamin tham giavo qu trnh to thnh hemicellulose.

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2.nh hng ca (NH4)2PO4

(NH4)2PO4 va l ngun cung cp nit,va l ngun cung cp phospho cho qutrnh sinh trng v pht trin ca vikhun Acertobacter xylinum.

S nh hng ca (NH4)2PO4 tng t

nh nh hng ca (NH4)2 SO4.

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3. nh hng ca cc loi ng

Acetobacter xylinum c th s dngglucose, sucrose, lactose, maltose,

dextrin v galactose do ng vi milai ng khc nhau m ta s dng scho ra thch da c trng thi khc

nhau.

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nh hng ca cc loi ng khc nhau n s

hnh thnh thch da trong nc da pH = 5.0

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4.nh hng ca nng cht kh

Nu nng cht kh cao qu ,VSV cth khng s dng ht gy lng ph ngthi c th gy c ch hat ng VSV.

Nu nng cht kh qu thp s khng cung cp cho qu trnh sng ca

VSV.

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5.nh hng ca nhit

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6.nh hng ca pH

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X.Hoch ton kinh t cho sn phm :

Chng ta bit thch da trthnh mt loi thc phm ph bin

trong khong 5 nm tr li y. Vn nhim mi trng, mt hngthch da gi km cht lng vmang nhiu c t nh hng xun xu hng tiu dng loi thcphm ny.

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Mc tiu :

Marketing c o, gii thiu, gio dcc sn phm mi.

To sn phm mi c bin tu, hon ton

tt cho sc khe. To lng tin cho khch hng, to thng

hiu cho sn phm.

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Gi s ta to c thch da nh yu cu:

-Nghin cu th trng v pht trin thm vsn phm ca th trng.

-Nghin cu sn phm.

-C mng li bun bn t hiu qu, tokhc bit v sn phm v dch v.

-ng thi ta phi nh gi chnh xc v mc

hp dn v mt kinh doanh.-Xc nh gi thnh v gi d kin.

-Kim tra ngun nguyn liu.

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Tnh ton chi ph sn phm:

Marketing cho sn phm. Li ch, cng dng ca sn phm.

Tnh ni bt ca sn phm, bn,

thi gian, bo qun. Kho st 1 sn phm thch da hon

chnh c gi bao nhiu?

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Nguyn liu sn xut thch daSTT Nguyn liu S lng n v Gi thnh

(VN)1 Nc da 100 lt 400002 ng Saccharose 3 Kg 150003 Amone Sulphate 1.2 Kg 40000

4 Diamone Sulphate 0.3 Kg 200005 Acid Acetic 750 ml 180006 NaHSO3 1 Kg 20000

7 Acid Citric 1 Kg 200008 Natribenzoat 0.5 Kg 150009 Bao b 45 Ci 20000

10 Chi ph khc 100000Tng: 308000

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S lng sn phm to thnh: 13Kg

Gi thnh sn xut 1Kg: 23700 VN Gi mt bch thch da 300g : 8000 VN

Gi d kin bn ra th trng: 17600 VN

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XI. Kt lun

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Cm n c v cc bn

lng nghe!