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result sql = On the 'discovery' of vitamin A.
On the 'discovery' of vitamin A.
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char = b;code = 98
char = s;code = 115
char = t;code = 116
char = a;code = 97
char = n;code = 110
char = c;code = 99
char = e;code = 101
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char = i;code = 105
char = n;code = 110
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char = m;code = 109
char = i;code = 105
char = l;code = 108
char = k;code = 107
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char = w;code = 119
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = f;code = 102
char = a;code = 97
char = t;code = 116
char = ;code = 32
char = s;code = 115
char = o;code = 111
char = l;code = 108
char = u;code = 117
char = b;code = 98
char = l;code = 108
char = e;code = 101
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = f;code = 102
char = o;code = 111
char = l;code = 108
char = l;code = 108
char = o;code = 111
char = w;code = 119
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = y;code = 121
char = e;code = 101
char = a;code = 97
char = r;code = 114
char = ,;code = 44
char = ;code = 32
char = H;code = 72
char = o;code = 111
char = p;code = 112
char = k;code = 107
char = i;code = 105
char = n;code = 110
char = s;code = 115
char = ;code = 32
char = s;code = 115
char = h;code = 104
char = o;code = 111
char = w;code = 119
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = a;code = 97
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char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = ';code = 39
char = a;code = 97
char = c;code = 99
char = c;code = 99
char = e;code = 101
char = s;code = 115
char = s;code = 115
char = o;code = 111
char = r;code = 114
char = y;code = 121
char = ;code = 32
char = f;code = 102
char = a;code = 97
char = c;code = 99
char = t;code = 116
char = o;code = 111
char = r;code = 114
char = s;code = 115
char = ';code = 39
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = e;code = 101
char = s;code = 115
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char = t;code = 116
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char = i;code = 105
char = n;code = 110
char = ;code = 32
char = ';code = 39
char = a;code = 97
char = s;code = 115
char = t;code = 116
char = o;code = 111
char = n;code = 110
char = i;code = 105
char = s;code = 115
char = h;code = 104
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = l;code = 108
char = y;code = 121
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char = s;code = 115
char = m;code = 109
char = a;code = 97
char = l;code = 108
char = l;code = 108
char = ;code = 32
char = a;code = 97
char = m;code = 109
char = o;code = 111
char = u;code = 117
char = n;code = 110
char = t;code = 116
char = s;code = 115
char = ';code = 39
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = m;code = 109
char = i;code = 105
char = l;code = 108
char = k;code = 107
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = a;code = 97
char = t;code = 116
char = ;code = 32
char = s;code = 115
char = u;code = 117
char = p;code = 112
char = p;code = 112
char = o;code = 111
char = r;code = 114
char = t;code = 116
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = l;code = 108
char = i;code = 105
char = f;code = 102
char = e;code = 101
char = .;code = 46
char = ;code = 32
char = C;code = 67
char = o;code = 111
char = n;code = 110
char = t;code = 116
char = r;code = 114
char = a;code = 97
char = r;code = 114
char = y;code = 121
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char = t;code = 116
char = o;code = 111
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = d;code = 100
char = o;code = 111
char = g;code = 103
char = m;code = 109
char = a;code = 97
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = a;code = 97
char = t;code = 116
char = ;code = 32
char = a;code = 97
char = l;code = 108
char = l;code = 108
char = ;code = 32
char = f;code = 102
char = a;code = 97
char = t;code = 116
char = s;code = 115
char = ;code = 32
char = h;code = 104
char = a;code = 97
char = d;code = 100
char = ;code = 32
char = s;code = 115
char = i;code = 105
char = m;code = 109
char = i;code = 105
char = l;code = 108
char = a;code = 97
char = r;code = 114
char = ;code = 32
char = n;code = 110
char = u;code = 117
char = t;code = 116
char = r;code = 114
char = i;code = 105
char = t;code = 116
char = i;code = 105
char = o;code = 111
char = n;code = 110
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = v;code = 118
char = a;code = 97
char = l;code = 108
char = u;code = 117
char = e;code = 101
char = ,;code = 44
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = 1;code = 49
char = 9;code = 57
char = 1;code = 49
char = 3;code = 51
char = ,;code = 44
char = ;code = 32
char = E;code = 69
char = l;code = 108
char = m;code = 109
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = M;code = 77
char = c;code = 99
char = C;code = 67
char = o;code = 111
char = l;code = 108
char = l;code = 108
char = u;code = 117
char = m;code = 109
char = ;code = 32
char = a;code = 97
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char = d;code = 100
char = ;code = 32
char = M;code = 77
char = a;code = 97
char = r;code = 114
char = g;code = 103
char = u;code = 117
char = e;code = 101
char = r;code = 114
char = i;code = 105
char = t;code = 116
char = e;code = 101
char = ;code = 32
char = D;code = 68
char = a;code = 97
char = v;code = 118
char = i;code = 105
char = s;code = 115
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char = a;code = 97
char = t;code = 116
char = ;code = 32
char = W;code = 87
char = i;code = 105
char = s;code = 115
char = c;code = 99
char = o;code = 111
char = n;code = 110
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char = i;code = 105
char = n;code = 110
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char = a;code = 97
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char = d;code = 100
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = o;code = 111
char = m;code = 109
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = O;code = 79
char = s;code = 115
char = b;code = 98
char = o;code = 111
char = r;code = 114
char = n;code = 110
char = e;code = 101
char = ;code = 32
char = a;code = 97
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char = d;code = 100
char = ;code = 32
char = L;code = 76
char = a;code = 97
char = f;code = 102
char = a;code = 97
char = y;code = 121
char = e;code = 101
char = t;code = 116
char = t;code = 116
char = e;code = 101
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char = M;code = 77
char = e;code = 101
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char = d;code = 100
char = e;code = 101
char = l;code = 108
char = ;code = 32
char = a;code = 97
char = t;code = 116
char = ;code = 32
char = Y;code = 89
char = a;code = 97
char = l;code = 108
char = e;code = 101
char = ;code = 32
char = s;code = 115
char = h;code = 104
char = o;code = 111
char = w;code = 119
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = b;code = 98
char = u;code = 117
char = t;code = 116
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = e;code = 101
char = g;code = 103
char = g;code = 103
char = ;code = 32
char = y;code = 121
char = o;code = 111
char = l;code = 108
char = k;code = 107
char = ;code = 32
char = w;code = 119
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = ;code = 32
char = n;code = 110
char = o;code = 111
char = t;code = 116
char = ;code = 32
char = e;code = 101
char = q;code = 113
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char = i;code = 105
char = v;code = 118
char = a;code = 97
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char = e;code = 101
char = n;code = 110
char = t;code = 116
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char = t;code = 116
char = o;code = 111
char = ;code = 32
char = l;code = 108
char = a;code = 97
char = r;code = 114
char = d;code = 100
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char = a;code = 97
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char = d;code = 100
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char = o;code = 111
char = l;code = 108
char = i;code = 105
char = v;code = 118
char = e;code = 101
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char = o;code = 111
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char = l;code = 108
char = ;code = 32
char = i;code = 105
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char = s;code = 115
char = u;code = 117
char = p;code = 112
char = p;code = 112
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char = r;code = 114
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char = n;code = 110
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char = t;code = 116
char = h;code = 104
char = e;code = 101
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char = g;code = 103
char = r;code = 114
char = o;code = 111
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char = t;code = 116
char = h;code = 104
char = ;code = 32
char = a;code = 97
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char = r;code = 114
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char = i;code = 105
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char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = s;code = 115
char = .;code = 46
char = ;code = 32
char = T;code = 84
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = g;code = 103
char = r;code = 114
char = o;code = 111
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char = t;code = 116
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char = -;code = 45
char = s;code = 115
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char = p;code = 112
char = p;code = 112
char = o;code = 111
char = r;code = 114
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char = i;code = 105
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char = ;code = 32
char = ';code = 39
char = a;code = 97
char = c;code = 99
char = c;code = 99
char = e;code = 101
char = s;code = 115
char = s;code = 115
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char = y;code = 121
char = ;code = 32
char = f;code = 102
char = a;code = 97
char = c;code = 99
char = t;code = 116
char = o;code = 111
char = r;code = 114
char = ';code = 39
char = ;code = 32
char = b;code = 98
char = e;code = 101
char = c;code = 99
char = a;code = 97
char = m;code = 109
char = e;code = 101
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char = k;code = 107
char = n;code = 110
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char = n;code = 110
char = ;code = 32
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = ';code = 39
char = f;code = 102
char = a;code = 97
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char = s;code = 115
char = o;code = 111
char = l;code = 108
char = u;code = 117
char = b;code = 98
char = l;code = 108
char = e;code = 101
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char = A;code = 65
char = ';code = 39
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = 1;code = 49
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char = 1;code = 49
char = 8;code = 56
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char = a;code = 97
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char = d;code = 100
char = ;code = 32
char = t;code = 116
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char = e;code = 101
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char = ';code = 39
char = v;code = 118
char = i;code = 105
char = t;code = 116
char = a;code = 97
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char = i;code = 105
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char = A;code = 65
char = ';code = 39
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = 1;code = 49
char = 9;code = 57
char = 2;code = 50
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char = .;code = 46
char = ;code = 32
char = P;code = 80
char = a;code = 97
char = u;code = 117
char = l;code = 108
char = ;code = 32
char = K;code = 75
char = a;code = 97
char = r;code = 114
char = r;code = 114
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = d;code = 100
char = e;code = 101
char = s;code = 115
char = c;code = 99
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char = i;code = 105
char = b;code = 98
char = e;code = 101
char = d;code = 100
char = ;code = 32
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char = h;code = 104
char = e;code = 101
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char = c;code = 99
char = h;code = 104
char = e;code = 101
char = m;code = 109
char = i;code = 105
char = c;code = 99
char = a;code = 97
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char = ;code = 32
char = s;code = 115
char = t;code = 116
char = r;code = 114
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char = c;code = 99
char = t;code = 116
char = u;code = 117
char = r;code = 114
char = e;code = 101
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char = o;code = 111
char = f;code = 102
char = ;code = 32
char = v;code = 118
char = i;code = 105
char = t;code = 116
char = a;code = 97
char = m;code = 109
char = i;code = 105
char = n;code = 110
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char = A;code = 65
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = 1;code = 49
char = 9;code = 57
char = 3;code = 51
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char = .;code = 46
char = ;code = 32
char = H;code = 72
char = a;code = 97
char = r;code = 114
char = r;code = 114
char = y;code = 121
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char = o;code = 111
char = l;code = 108
char = m;code = 109
char = e;code = 101
char = s;code = 115
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char = a;code = 97
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char = R;code = 82
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char = t;code = 116
char = h;code = 104
char = ;code = 32
char = C;code = 67
char = o;code = 111
char = r;code = 114
char = b;code = 98
char = e;code = 101
char = t;code = 116
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char = s;code = 115
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char = a;code = 97
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char = A;code = 65
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char = i;code = 105
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char = 1;code = 49
char = 9;code = 57
char = 3;code = 51
char = 7;code = 55
char = .;code = 46
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char = M;code = 77
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char = h;code = 104
char = o;code = 111
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char = s;code = 115
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char = f;code = 102
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char = t;code = 116
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char = f;code = 102
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char = t;code = 116
char = a;code = 97
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char = i;code = 105
char = n;code = 110
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char = A;code = 65
char = ;code = 32
char = c;code = 99
char = a;code = 97
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char = e;code = 101
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char = w;code = 119
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char = t;code = 116
char = h;code = 104
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char = t;code = 116
char = h;code = 104
char = e;code = 101
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char = w;code = 119
char = o;code = 111
char = r;code = 114
char = k;code = 107
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char = o;code = 111
char = f;code = 102
char = ;code = 32
char = D;code = 68
char = a;code = 97
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char = r;code = 114
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char = a;code = 97
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char = n;code = 110
char = ;code = 32
char = v;code = 118
char = a;code = 97
char = n;code = 110
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char = D;code = 68
char = o;code = 111
char = r;code = 114
char = p;code = 112
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char = a;code = 97
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char = d;code = 100
char = ;code = 32
char = J;code = 74
char = o;code = 111
char = z;code = 122
char = e;code = 101
char = f;code = 102
char = ;code = 32
char = F;code = 70
char = e;code = 101
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char = n;code = 110
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char = d;code = 100
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char = A;code = 65
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char = n;code = 110
char = s;code = 115
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char = i;code = 105
char = n;code = 110
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char = 1;code = 49
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char = 4;code = 52
char = 6;code = 54
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char = a;code = 97
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char = d;code = 100
char = ;code = 32
char = O;code = 79
char = t;code = 116
char = t;code = 116
char = o;code = 111
char = ;code = 32
char = I;code = 73
char = s;code = 115
char = l;code = 108
char = e;code = 101
char = r;code = 114
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char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = c;code = 99
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char = l;code = 108
char = e;code = 101
char = a;code = 97
char = g;code = 103
char = u;code = 117
char = e;code = 101
char = s;code = 115
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char = i;code = 105
char = n;code = 110
char = ;code = 32
char = 1;code = 49
char = 9;code = 57
char = 4;code = 52
char = 7;code = 55
char = .;code = 46
char = ;code = 32
char = F;code = 70
char = u;code = 117
char = r;code = 114
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = r;code = 114
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char = w;code = 119
char = o;code = 111
char = r;code = 114
char = k;code = 107
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char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
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char = r;code = 114
char = o;code = 111
char = l;code = 108
char = e;code = 101
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char = o;code = 111
char = f;code = 102
char = ;code = 32
char = v;code = 118
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char = t;code = 116
char = a;code = 97
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char = i;code = 105
char = n;code = 110
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char = A;code = 65
char = ;code = 32
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char = i;code = 105
char = m;code = 109
char = m;code = 109
char = u;code = 117
char = n;code = 110
char = i;code = 105
char = t;code = 116
char = y;code = 121
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = c;code = 99
char = h;code = 104
char = i;code = 105
char = l;code = 108
char = d;code = 100
char = ;code = 32
char = s;code = 115
char = u;code = 117
char = r;code = 114
char = v;code = 118
char = i;code = 105
char = v;code = 118
char = a;code = 97
char = l;code = 108
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
char = t;code = 116
char = i;code = 105
char = n;code = 110
char = u;code = 117
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = u;code = 117
char = n;code = 110
char = t;code = 116
char = i;code = 105
char = l;code = 108
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = r;code = 114
char = o;code = 111
char = u;code = 117
char = g;code = 103
char = h;code = 104
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = 1;code = 49
char = 9;code = 57
char = 9;code = 57
char = 0;code = 48
char = s;code = 115
char = .;code = 46
char = <;code = 60
char = b;code = 98
char = r;code = 114
char = /;code = 47
char = >;code = 62
result sql = Vitamin A is essential for normal growth, reproduction, immunity, and vision. The characterization of vitamin A spanned a period of about 130 years. During this long, incremental process, there is no single event that can be called the 'discovery' of vitamin A. The physiologist François Magendie conducted nutritional deprivation experiments with dogs in 1816 that resulted in corneal ulcers and high mortality - a finding similar to the common clinical situation in poorly fed, abandoned infants in Paris. In the 1880s, Nicolai Lunin showed that there was an unknown substance in milk that was essential for nutrition. Carl Socin suggested that an unknown substance for growth in egg yolk was fat soluble. Frederick Gowland Hopkins proposed in 1906 that there were 'unsuspected dietetic factors' that were necessary for life. In 1911, Wilhelm Stepp demonstrated that this essential substance in milk was fat soluble. The following year, Hopkins showed that there were 'accessory factors' present in 'astonishingly small amounts' in milk that supported life. Contrary to the dogma that all fats had similar nutritional value, in 1913, Elmer McCollum and Marguerite Davis at Wisconsin and Thomas Osborne and Lafayette Mendel at Yale showed butter and egg yolk were not equivalent to lard and olive oil in supporting the growth and survival of rats. The growth-supporting 'accessory factor' became known as 'fat-soluble A' in 1918 and then 'vitamin A' in 1920. Paul Karrer described the chemical structure of vitamin A in 1932. Harry Holmes and Ruth Corbet isolated and crystallized vitamin A in 1937. Methods for the synthesis of vitamin A came with the work of David Adriaan van Dorp and Jozef Ferdinand Arens in 1946 and Otto Isler and colleagues in 1947. Further work on the role of vitamin A in immunity and child survival continued until through the 1990s.

Publication: Ann. Nutr. Metab. 2012 ;61(3)::192-8. :doi: 10.1159/000343124.
Publication Date: 2012
Study Author(s): Semba, Richard D;
Institution: Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA. rdsemba @ jhmi.edu
Shortcut link to this study:
Vitamin A is essential for normal growth, reproduction, immunity, and vision. The characterization of vitamin A spanned a period of about 130 years. During this long, incremental process, there is no single event that can be called the 'discovery' of vitamin A. The physiologist François Magendie conducted nutritional deprivation experiments with dogs in 1816 that resulted in corneal ulcers and high mortality - a finding similar to the common clinical situation in poorly fed, abandoned infants in Paris. In the 1880s, Nicolai Lunin showed that there was an unknown substance in milk that was essential for nutrition. Carl Socin suggested that an unknown substance for growth in egg yolk was fat soluble. Frederick Gowland Hopkins proposed in 1906 that there were 'unsuspected dietetic factors' that were necessary for life. In 1911, Wilhelm Stepp demonstrated that this essential substance in milk was fat soluble. The following year, Hopkins showed that there were 'accessory factors' present in 'astonishingly small amounts' in milk that supported life. Contrary to the dogma that all fats had similar nutritional value, in 1913, Elmer McCollum and Marguerite Davis at Wisconsin and Thomas Osborne and Lafayette Mendel at Yale showed butter and egg yolk were not equivalent to lard and olive oil in supporting the growth and survival of rats. The growth-supporting 'accessory factor' became known as 'fat-soluble A' in 1918 and then 'vitamin A' in 1920. Paul Karrer described the chemical structure of vitamin A in 1932. Harry Holmes and Ruth Corbet isolated and crystallized vitamin A in 1937. Methods for the synthesis of vitamin A came with the work of David Adriaan van Dorp and Jozef Ferdinand Arens in 1946 and Otto Isler and colleagues in 1947. Further work on the role of vitamin A in immunity and child survival continued until through the 1990s.
PMID: 23183288

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