WJEC Level 3 Diploma In Food Science And Nutrition

50 6LPLODU FKDQJHV KDSSHQ ZLWK ʐVK DQG VHDIRRG DOWKRXJK WKHVH KDYH OHVV FRQQHFWLYH WLVVXH VR GHQDWXUDWLRQ KDSSHQV DW ORZHU WHPSHUDWXUHV DQG LQ D VKRUWHU SHULRG RI WLPH WKDQ LQ PHDW DQG SRXOWU\ Exposure to acid ⦁ 6RPH DPLQR DFLGV LQ SURWHLQ PROHFXOHV KDYH QHJDWLYHO\ DQG SRVLWLYHO\ FKDUJHG VLGHV WR WKHLU PROHFXOHV ⦁ 1HJDWLYHO\ FKDUJHG VLGHV ZLOO DWWUDFW SRVLWLYHO\ FKDUJHG ions: DQ LRQ LV D SRVLWLYHO\ RU QHJDWLYHO\ FKDUJHG DWRP RU PROHFXOH ⦁ $FLGV SURGXFH SRVLWLYHO\ FKDUJHG K\GURJHQ LRQV + ZKHQ GLVVROYHG LQ ZDWHU DQG DUH DWWUDFWHG WR WKH QHJDWLYHO\ FKDUJHG VLGHV RI DPLQR DFLGV ⦁ 7KLV FDXVHV WKH DPLQR DFLG WR FKDQJH DQG WKHUHIRUH WKH SURWHLQ WR GHQDWXUH ⦁ ,Q DGGLWLRQ K\GURJHQ ERQGV WKDW KROG FRPSDFW SURWHLQ PROHFXOHV LQ WKHLU IROGHG VKDSH ZLOO EUHDN ZKHQ H[SRVHG WR DFLG FDXVLQJ WKH FRPSDFW PROHFXOHV WR XQUDYHO GHQDWXUH ⦁ $FLGV DUH XVHG WR GHQDWXUH SURWHLQV LQ IRRG SURGXFWLRQ DV GHVFULEHG LQ WKH IROORZLQJ H[DPSOHV Fish ⦁ 7KH FLWULF DFLG DQG RWKHU QDWXUDO DFLGV LQ HLWKHU OHPRQ RU OLPH MXLFH LV XVHG WR PDNH D GLVK FDOOHG ceviche ⦁ 6NLQOHVV UDZ XVXDOO\ ZKLWH ʐVK LV FXW LQWR VPDOO FXEHV RU WKLQ VOLFHV WKHQ PL[HG ZLWK OHPRQ DQG RU OLPH MXLFH DQG OHIW LQ D GLVK LQ D FRRO SODFH IRU XS WR KDOI DQ KRXU ⦁ ([SRVXUH WR WKH FLWULF DFLG ZLOO GHQDWXUH WKH SURWHLQV ⦁ 7KH VHQVRU\ FKDUDFWHULVWLFV RI WKH UDZ ʐVK ZLOO FKDQJH VR WKDW WKH flHVK RI ZKLWH ʐVK ZLOO EHFRPH RSDTXH LQ DSSHDUDQFH DQG ʐUP LQ WH[WXUH VLPLODU WR ZKDW LW GRHV ZKHQ KHDW LV DSSOLHG WR FRRN ʐVK Dairy foods (milk and milk products) 7KH PDLQ W\SH RI SURWHLQ LQ GDLU\ PLON LV casein &DVHLQ PROHFXOHV VWD\ LQ VXVSHQVLRQ LQ PLON EHFDXVH WKH\ DUH LQ WKH IRUP RI WLQ\ GURSOHWV FDOOHG micelles 0LFHOOHV KDYH hydrophilic ZDWHU ORYLQJ ŞWKUHDGVş RI SURWHLQ PROHFXOHV FRYHULQJ WKHLU VXUIDFH VXUURXQGLQJ PDQ\ WLQ\ FOXVWHUV RI FDOFLXP SKRVSKDWH LQ WKH FHQWUH DV VKRZQ LQ WKLV GLDJUDP calcium phosphate peptide chains Chapter 5: The scientific properties of food Unit 3: Experimenting to solve food production problems (LO2)

RkJQdWJsaXNoZXIy Nzc1OTg=