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char = g;code = 103
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char = o;code = 111
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char = t;code = 116
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char = d;code = 100
char = e;code = 101
char = r;code = 114
char = .;code = 46
result sql = Bull semen in vitro fertility after cryopreservation using egg yolk LDL: a comparison with Optidyl, a commercial egg yolk extender.
Bull semen in vitro fertility after cryopreservation using egg yolk LDL: a comparison with Optidyl, a commercial egg yolk extender.
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char = o;code = 111
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char = i;code = 105
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char = s;code = 115
char = ;code = 32
char = (;code = 40
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char = a;code = 97
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char = o;code = 111
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char = ;code = 32
char = y;code = 121
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char = k;code = 107
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char = T;code = 84
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char = e;code = 101
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char = f;code = 102
char = e;code = 101
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char = L;code = 76
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char = p;code = 112
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char = r;code = 114
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char = ;code = 32
char = m;code = 109
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char = e;code = 101
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char = L;code = 76
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char = r;code = 114
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char = s;code = 115
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char = ;code = 32
char = (;code = 40
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char = ;code = 32
char = <;code = 60
char = ;code = 32
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char = .;code = 46
char = 0;code = 48
char = 5;code = 53
char = );code = 41
char = .;code = 46
char = ;code = 32
char = N;code = 78
char = o;code = 111
char = ;code = 32
char = s;code = 115
char = i;code = 105
char = g;code = 103
char = n;code = 110
char = i;code = 105
char = f;code = 102
char = i;code = 105
char = c;code = 99
char = a;code = 97
char = n;code = 110
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char = i;code = 105
char = f;code = 102
char = f;code = 102
char = e;code = 101
char = r;code = 114
char = e;code = 101
char = n;code = 110
char = c;code = 99
char = e;code = 101
char = ;code = 32
char = w;code = 119
char = a;code = 97
char = s;code = 115
char = ;code = 32
char = o;code = 111
char = b;code = 98
char = s;code = 115
char = e;code = 101
char = r;code = 114
char = v;code = 118
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = o;code = 111
char = n;code = 110
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = b;code = 98
char = l;code = 108
char = a;code = 97
char = s;code = 115
char = t;code = 116
char = o;code = 111
char = c;code = 99
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char = s;code = 115
char = t;code = 116
char = ;code = 32
char = r;code = 114
char = a;code = 97
char = t;code = 116
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = f;code = 102
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = v;code = 118
char = i;code = 105
char = t;code = 116
char = r;code = 114
char = o;code = 111
char = ;code = 32
char = c;code = 99
char = u;code = 117
char = l;code = 108
char = t;code = 116
char = u;code = 117
char = r;code = 114
char = e;code = 101
char = .;code = 46
char = ;code = 32
char = I;code = 73
char = n;code = 110
char = t;code = 116
char = e;code = 101
char = g;code = 103
char = r;code = 114
char = i;code = 105
char = t;code = 116
char = y;code = 121
char = ;code = 32
char = o;code = 111
char = f;code = 102
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = c;code = 99
char = r;code = 114
char = o;code = 111
char = s;code = 115
char = o;code = 111
char = m;code = 109
char = e;code = 101
char = ;code = 32
char = a;code = 97
char = n;code = 110
char = d;code = 100
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = p;code = 112
char = l;code = 108
char = a;code = 97
char = s;code = 115
char = m;code = 109
char = a;code = 97
char = ;code = 32
char = m;code = 109
char = e;code = 101
char = m;code = 109
char = b;code = 98
char = r;code = 114
char = a;code = 97
char = n;code = 110
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 = m;code = 109
char = a;code = 97
char = i;code = 105
char = n;code = 110
char = t;code = 116
char = a;code = 97
char = i;code = 105
char = n;code = 110
char = e;code = 101
char = d;code = 100
char = ;code = 32
char = i;code = 105
char = n;code = 110
char = ;code = 32
char = b;code = 98
char = o;code = 111
char = t;code = 116
char = h;code = 104
char = ;code = 32
char = e;code = 101
char = x;code = 120
char = t;code = 116
char = e;code = 101
char = n;code = 110
char = d;code = 100
char = e;code = 101
char = r;code = 114
char = s;code = 115
char = .;code = 46
char = ;code = 32
char = I;code = 73
char = n;code = 110
char = ;code = 32
char = c;code = 99
char = o;code = 111
char = n;code = 110
char = c;code = 99
char = l;code = 108
char = u;code = 117
char = s;code = 115
char = i;code = 105
char = o;code = 111
char = n;code = 110
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char = ;code = 32
char = L;code = 76
char = D;code = 68
char = L;code = 76
char = ;code = 32
char = p;code = 112
char = r;code = 114
char = e;code = 101
char = s;code = 115
char = e;code = 101
char = r;code = 114
char = v;code = 118
char = e;code = 101
char = ;code = 32
char = b;code = 98
char = u;code = 117
char = l;code = 108
char = l;code = 108
char = ;code = 32
char = s;code = 115
char = e;code = 101
char = m;code = 109
char = e;code = 101
char = n;code = 110
char = ;code = 32
char = q;code = 113
char = u;code = 117
char = a;code = 97
char = l;code = 108
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 = f;code = 102
char = e;code = 101
char = r;code = 114
char = t;code = 116
char = i;code = 105
char = l;code = 108
char = i;code = 105
char = z;code = 122
char = i;code = 105
char = n;code = 110
char = g;code = 103
char = ;code = 32
char = a;code = 97
char = b;code = 98
char = i;code = 105
char = l;code = 108
char = i;code = 105
char = t;code = 116
char = y;code = 121
char = ,;code = 44
char = ;code = 32
char = a;code = 97
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 = a;code = 97
char = l;code = 108
char = s;code = 115
char = o;code = 111
char = ;code = 32
char = b;code = 98
char = e;code = 101
char = t;code = 116
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = s;code = 115
char = e;code = 101
char = m;code = 109
char = e;code = 101
char = n;code = 110
char = ;code = 32
char = m;code = 109
char = o;code = 111
char = t;code = 116
char = i;code = 105
char = l;code = 108
char = i;code = 105
char = t;code = 116
char = y;code = 121
char = ,;code = 44
char = ;code = 32
char = a;code = 97
char = f;code = 102
char = t;code = 116
char = e;code = 101
char = r;code = 114
char = ;code = 32
char = t;code = 116
char = h;code = 104
char = e;code = 101
char = ;code = 32
char = f;code = 102
char = r;code = 114
char = e;code = 101
char = e;code = 101
char = z;code = 122
char = e;code = 101
char = -;code = 45
char = t;code = 116
char = h;code = 104
char = a;code = 97
char = w;code = 119
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
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char = .;code = 46
char = <;code = 60
char = b;code = 98
char = r;code = 114
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char = >;code = 62
result sql = Low-density lipoproteins (LDL) have been previously isolated and identified as the cryoprotective fraction of yolk. The effect of LDL on sperm motility after freezing-thawing has been reported, but no study has been made to assess the effect of LDL on bull semen fertility. The aim of this study was to evaluate the fertility of bull semen cryopreserved in the presence of LDL. Motility of semen cryopreserved in LDL was analyzed and compared to semen cryopreserved with Optidyl, a commercial extender containing egg yolk. To evaluate the fertilizing ability of semen, we used in vitro fertilization test, whereas acrosome and plasma membrane integrity were also evaluated. The percentage of motile spermatozoa was two fold higher after freezing in LDL than in Optidyl 54.4% versus 30.2% (P < 0.05). The cleavage rate was significantly higher after fertilization with semen frozen in LDL than with Optidyl 63.0% versus 54.8% (P < 0.05). No significant difference was observed on the blastocyst rate after in vitro culture. Integrity of the acrosome and the plasma membrane were maintained in both extenders. In conclusion, LDL preserve bull semen quality and fertilizing ability, allowing also better semen motility, after the freeze-thaw process.

Publication: Theriogenology 2004 Apr 1 ;61(5)::895-907.
Publication Date: 2004 Apr 1
Study Author(s): Amirat, Lamia;Tainturier, Daniel;Jeanneau, Laëtitia;Thorin, Chantal;Gérard, Olivier;Courtens, Jean Luc;Anton, Marc;
Institution: Laboratory of Biotechnology and Pathology of Reproduction, National Veterinary School of Nantes, Nantes, France.
Shortcut link to this study:
Low-density lipoproteins (LDL) have been previously isolated and identified as the cryoprotective fraction of yolk. The effect of LDL on sperm motility after freezing-thawing has been reported, but no study has been made to assess the effect of LDL on bull semen fertility. The aim of this study was to evaluate the fertility of bull semen cryopreserved in the presence of LDL. Motility of semen cryopreserved in LDL was analyzed and compared to semen cryopreserved with Optidyl, a commercial extender containing egg yolk. To evaluate the fertilizing ability of semen, we used in vitro fertilization test, whereas acrosome and plasma membrane integrity were also evaluated. The percentage of motile spermatozoa was two fold higher after freezing in LDL than in Optidyl 54.4% versus 30.2% (P < 0.05). The cleavage rate was significantly higher after fertilization with semen frozen in LDL than with Optidyl 63.0% versus 54.8% (P < 0.05). No significant difference was observed on the blastocyst rate after in vitro culture. Integrity of the acrosome and the plasma membrane were maintained in both extenders. In conclusion, LDL preserve bull semen quality and fertilizing ability, allowing also better semen motility, after the freeze-thaw process.
PMID: 14757475

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