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result sql = Evaluation of the stable reaction products of histidine with formaldehyde or with other carbonyl compounds in dairy products.
Evaluation of the stable reaction products of histidine with formaldehyde or with other carbonyl compounds in dairy products.
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char = ;code = 32
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char = p;code = 112
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char = e;code = 101
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char = ;code = 32
char = c;code = 99
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char = e;code = 101
char = e;code = 101
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char = ;code = 32
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char = h;code = 104
char = e;code = 101
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char = r;code = 114
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char = g;code = 103
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char = s;code = 115
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char = f;code = 102
char = ;code = 32
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char = i;code = 105
char = c;code = 99
char = h;code = 104
char = ;code = 32
char = w;code = 119
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char = r;code = 114
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char = ;code = 32
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char = t;code = 116
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char = e;code = 101
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char = m;code = 109
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char = r;code = 114
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char = ,;code = 44
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
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char = r;code = 114
char = d;code = 100
char = e;code = 101
char = r;code = 114
char = ;code = 32
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char = o;code = 111
char = ;code = 32
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char = i;code = 105
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char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
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char = 7;code = 55
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char = ;code = 32
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char = b;code = 98
char = l;code = 108
char = y;code = 121
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = v;code = 118
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = f;code = 102
char = r;code = 114
char = o;code = 111
char = m;code = 109
char = ;code = 32
char = b;code = 98
char = i;code = 105
char = o;code = 111
char = g;code = 103
char = e;code = 101
char = n;code = 110
char = i;code = 105
char = c;code = 99
char = ;code = 32
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char = ,;code = 44
char = ;code = 32
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char = n;code = 110
char = d;code = 100
char = ;code = 32
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char = o;code = 111
char = ;code = 32
char = d;code = 100
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char = t;code = 116
char = e;code = 101
char = c;code = 99
char = t;code = 116
char = ;code = 32
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char = h;code = 104
char = e;code = 101
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = r;code = 114
char = ;code = 32
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char = A;code = 65
char = ;code = 32
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char = a;code = 97
char = s;code = 115
char = ;code = 32
char = u;code = 117
char = s;code = 115
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = o;code = 111
char = c;code = 99
char = e;code = 101
char = s;code = 115
char = s;code = 115
char = i;code = 105
char = n;code = 110
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result sql = Combined formaldehyde (FA) can be evaluated in cheese and other dairy products by determining spinacine (6-carboxy-1,2,3,4-tetrahydroimidazopyridine), an imino acid arising from the reaction of FA with the alpha-amino group of histidine. Other carbonyl compounds usually produced by fermentations can react themselves with histidine, forming molecules which interfere with the determination of spinacine. A sensitive (minimum detectable amount, 5 fmol spinacine) and interference-free HPLC method, with precolumn derivatization with o-phtalaldehyde (OPA) and 9-fluorenylmethylchloroformate (FMOC), to evaluate these histidine reaction-compounds in dairy products is described. The clean-up of the FMOC-derivatized sample has been performed for the first time with solid-phase extraction (SPE) on an amino cartridge. The method was applied to samples of casein and differently ripened cheese, the origins of which were either known or commercial, in order to quantify the natural level of spinacine (0.7-2.7 ppm) probably deriving from biogenic FA, and to detect whether FA was used in processing.

Publication: Z Lebensm Unters Forsch 1996 Jan ;202(1)::66-71.
Publication Date: 1996 Jan
Study Author(s): Pellegrino, L;Resmini, P;
Institution: Milk Centre of National Research Council, Milan, Italy.
Shortcut link to this study:
Combined formaldehyde (FA) can be evaluated in cheese and other dairy products by determining spinacine (6-carboxy-1,2,3,4-tetrahydroimidazopyridine), an imino acid arising from the reaction of FA with the alpha-amino group of histidine. Other carbonyl compounds usually produced by fermentations can react themselves with histidine, forming molecules which interfere with the determination of spinacine. A sensitive (minimum detectable amount, 5 fmol spinacine) and interference-free HPLC method, with precolumn derivatization with o-phtalaldehyde (OPA) and 9-fluorenylmethylchloroformate (FMOC), to evaluate these histidine reaction-compounds in dairy products is described. The clean-up of the FMOC-derivatized sample has been performed for the first time with solid-phase extraction (SPE) on an amino cartridge. The method was applied to samples of casein and differently ripened cheese, the origins of which were either known or commercial, in order to quantify the natural level of spinacine (0.7-2.7 ppm) probably deriving from biogenic FA, and to detect whether FA was used in processing.
PMID: 8717097

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