【目的】建立液相色谱-串联质谱法同时测定蛋黄中4种类胡萝卜素着色剂(角黄素、柑橘皮类胡萝卜素、β-阿朴-8'-胡萝卜素酸乙酯和β-阿朴-8'-胡萝卜素醛)的方法。【方法】蛋黄经乙腈提取,采用Waters Xterra MS C18色谱柱分离;质...【目的】建立液相色谱-串联质谱法同时测定蛋黄中4种类胡萝卜素着色剂(角黄素、柑橘皮类胡萝卜素、β-阿朴-8'-胡萝卜素酸乙酯和β-阿朴-8'-胡萝卜素醛)的方法。【方法】蛋黄经乙腈提取,采用Waters Xterra MS C18色谱柱分离;质谱采用电喷雾正离子电离模式和多反应扫描监测模式进行测定,以外标法定量。【结果】4种类胡萝卜素着色剂的检出限均为2.5 ng/g;在2.5~200ng/g范围内线性关系良好,相关系数r>0.99;回收率在82.24%~109.2%之间,相对标准偏差为1.0%~3.0%(n=6)。【结论】本方法灵敏度高、准确性好,适用于蛋黄中4种类胡萝卜素着色剂的检测。展开更多
A laboratory colony of Coleomegilla maculata (DeGeer), ye, selected for a pigmentation deficiency, was restored to near wild type cuticle coloration by adding crushed heads and wings of the red colored parental strain...A laboratory colony of Coleomegilla maculata (DeGeer), ye, selected for a pigmentation deficiency, was restored to near wild type cuticle coloration by adding crushed heads and wings of the red colored parental strain to the diet. While the wings and other colored portions of the cuticle re-gained the red color, the eyes of the pigmentation deficient insects were not changed from the pale mutant form. Plant derived carotenes lycopene and beta-carotene did not restore the mutant beetles to a visibly distinguishable red color. An additional pigmentation deficient mutant strain, gold, partially recovered red cuticle color when provided with diet containing pigmented insect particles. This work represents the first rescue of a color phenotype in a lady beetle.展开更多
A laboratory colony of <i>Coleomegilla maculata</i> (DeGeer), ye, selected for a pigmentation deficiency, was restored to near wild type cuticle coloration by adding crushed heads and wings of the red colo...A laboratory colony of <i>Coleomegilla maculata</i> (DeGeer), ye, selected for a pigmentation deficiency, was restored to near wild type cuticle coloration by adding crushed heads and wings of the red colored parental strain to the diet. While the wings and other colored portions of the cuticle re-gained the red color, the eyes of the pigmentation deficient insects were not changed from the pale mutant form. Plant derived carotenes lycopene and beta-carotene did not restore the mutant beetles to a visibly distinguishable red color. An additional pigmentation deficient mutant strain, gold, partially recovered red cuticle color when provided with diet containing pigmented insect particles. This work represents the first rescue of a color phenotype in a lady beetle.展开更多
文摘【目的】建立液相色谱-串联质谱法同时测定蛋黄中4种类胡萝卜素着色剂(角黄素、柑橘皮类胡萝卜素、β-阿朴-8'-胡萝卜素酸乙酯和β-阿朴-8'-胡萝卜素醛)的方法。【方法】蛋黄经乙腈提取,采用Waters Xterra MS C18色谱柱分离;质谱采用电喷雾正离子电离模式和多反应扫描监测模式进行测定,以外标法定量。【结果】4种类胡萝卜素着色剂的检出限均为2.5 ng/g;在2.5~200ng/g范围内线性关系良好,相关系数r>0.99;回收率在82.24%~109.2%之间,相对标准偏差为1.0%~3.0%(n=6)。【结论】本方法灵敏度高、准确性好,适用于蛋黄中4种类胡萝卜素着色剂的检测。
文摘A laboratory colony of Coleomegilla maculata (DeGeer), ye, selected for a pigmentation deficiency, was restored to near wild type cuticle coloration by adding crushed heads and wings of the red colored parental strain to the diet. While the wings and other colored portions of the cuticle re-gained the red color, the eyes of the pigmentation deficient insects were not changed from the pale mutant form. Plant derived carotenes lycopene and beta-carotene did not restore the mutant beetles to a visibly distinguishable red color. An additional pigmentation deficient mutant strain, gold, partially recovered red cuticle color when provided with diet containing pigmented insect particles. This work represents the first rescue of a color phenotype in a lady beetle.
文摘A laboratory colony of <i>Coleomegilla maculata</i> (DeGeer), ye, selected for a pigmentation deficiency, was restored to near wild type cuticle coloration by adding crushed heads and wings of the red colored parental strain to the diet. While the wings and other colored portions of the cuticle re-gained the red color, the eyes of the pigmentation deficient insects were not changed from the pale mutant form. Plant derived carotenes lycopene and beta-carotene did not restore the mutant beetles to a visibly distinguishable red color. An additional pigmentation deficient mutant strain, gold, partially recovered red cuticle color when provided with diet containing pigmented insect particles. This work represents the first rescue of a color phenotype in a lady beetle.
