{"refrec":{"BRefID":11543,"RR":"<b>Vyncke, W.</b> (1965). De brekingsindex van het oogvocht als objektieve kwaliteitsmethode voor vis. <i>Meded. Rijksfac. Landbouwwet. Gent 30(4)</i>: 2027-2035","BEntID":11543,"PublicFlag":1,"CheckedFlag":0,"wosflag":null,"vabbflag":null,"RefStringPartII":". <i>Meded. Rijksfac. Landbouwwet. Gent 30(4)</i>: 2027-2035","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Vyncke, W.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Vyncke, W.","Englishabstract":"The  possibilities of the refractive  index  (RI )  of the  eye fluid as a freshness test for fish were investigated. Procedure details  were studied in order  to improve the usefulness of the method. The  following fishes were used : cod  (<i>Gadus morhua</i> L), plaice  (<i>Pleuronectes platessa</i> L), redfish   (<i>Sebastes  marinus</i>  L)  and   blue  ling (<i>Molva byrkelange</i>).It  appears necessary  to  extract nearly the whole  quantity  of  eye fluid. Checking the RI  of  left and  right  eye can  be omitted. Centrifuging the eye fluid is not  absolutely required but  improves readability. Filtration has  no  practical value.  Keeping the eye fluid during 24 hrs at  I ° C results  only  in a very slight increase  in  RI  : if necessary,  determinations can  be  postponed  without harm. The  temperature of the refractometer must  be maintained at  20° C  ±  1,5o C. At fairly  constant room temperature, no thermostat is required  for routine analyses. A handrefractometer appears to be of little  use.With  redfish  and  blue  ling,  no satisfactory results  are  obtained.  Spoilage curves  of cod  and  plaice  on  the  other  hand  agree  fairly  well with organoleptic judgment. The  RI  seems to be a useful freshness test with  those species. Quality gradings are  proposed.Advantages and  limitations of the  method were  investigated. The  RI  can be  determined very  quickly  with  simple  apparatus and  by non  specialised  personnel.  However, no determination is possible on  beheaded of proccssed fish or on fish with  very  small  eyes.  As variations among individuals can  be  large,  a sufficient  number of fishes should  always  be taken  for analysis.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"De brekingsindex van het oogvocht als objektieve kwaliteitsmethode voor vis","OrigTitleLangCode":"nl","OrigTitleLangCodeExtended":"dut","OrigTitleLangID":41,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":1965,"MonPub":null,"DateUpdate":"2012-09-28","DateCreate":"2001-06-18","SecASFANote":null,"ConfID":null,"PeerRev":0,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":1},"refs":null,"anarec":{"AnaID":11543,"PubliDate":1965,"Pagination":"2027-2035","XtraPublOfAnaID":null,"ISBN":null,"Volume":"30","Issue":"4","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":45042,"SerRR":"Mededelingen van de Rijksfaculteit Landbouwwetenschappen te Gent. 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