Chinese Journal of Tissue Engineering Research ›› 2023, Vol. 27 ›› Issue (30): 4817-4823.doi: 10.12307/2023.546
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Lu Tian1, 2, Tao Yuan3, Yang Tuo1, 2, Sun Lulu2, Pei Xinyang1, Zhao Liang1, 2, Li Wenbin1, 4
Received:
2022-07-25
Accepted:
2022-09-21
Online:
2023-10-28
Published:
2023-04-03
Contact:
Li Wenbin, Chief physician, Professor, Doctoral supervisor, Department of Cardiothoracic Surgery, The Third Affiliated Hospital of Xinxiang Medical University, Xinxiang 453003, Henan Province, China; Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
Zhao Liang, Associate professor, Master’s supervisor, Department of Cardiothoracic Surgery, The Third Affiliated Hospital of Xinxiang Medical University, Xinxiang 453003, Henan Province, China; College of Life Science and Technology, Xinxiang Medical University Xinxiang 453003, Henan Province, China
About author:
Lu Tian, Master candidate, Department of Cardiothoracic Surgery, The Third Affiliated Hospital of Xinxiang Medical University, Xinxiang 453003, Henan Province, China; College of Life Science and Technology, Xinxiang Medical University, Xinxiang 453003, Henan Province, China
Supported by:
CLC Number:
Lu Tian, Tao Yuan, Yang Tuo, Sun Lulu, Pei Xinyang, Zhao Liang, Li Wenbin. Optimization of specific adsorption conditions for hemoglobin in blood by graphite-phase carbon nitride[J]. Chinese Journal of Tissue Engineering Research, 2023, 27(30): 4817-4823.
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2.6.2 模型建立 利用Design-Expert.8.0.6软件对实验结果进行多元拟合,得到pH值(A)、石墨相氮化碳∶血样(B)、反应温度(C)、反应时间(D)的多项回归方程:吸附效率=33.24+0.93A+1.79B+1.70C+15.65D+0.43AB+0.67AC-0.10AD-0.14BC+1.66BD+1.66CD。 2.6.3 方差分析 利用Design-Expert.8.0.6软件对实验结果进行多元回归分析,具体结果见表3。方差分析表明,以全血中游离血红蛋白吸附效率为响应值建立的回归模型是显著的,同时误差项不显著,说明建立的回归方程与实际情况吻合度较好,确定系数R2=0.990 6,R2Adj=0.985 4。基于R2及R2Adj接近于1的数值,可用该模型回归方程代替真实实验点对实验结果进行分析。模型中为多元一次项,表明选定的4个因素对全血中游离血红蛋白吸附效率的影响是线性关系。影响全血中游离血红蛋白吸附效率的因素按主次顺序排列为:反应时间(D)>pH值(A)>反应温度(C)>石墨相氮化碳∶血样(B)。"
通过Design-Expert.8.0.6软件计算本实验的多元回归方程,可以得到4个因素的最佳作用值。利用软件分析得全血中游离血红蛋白吸附效率最高的实验条件为:pH=7.5,石墨相氮化碳∶血样为6.00 mg∶1 mL,反应温度为36.5 ℃,反应时间为60 min,石墨相氮化碳对全血中游离血红蛋白的吸附效率为54.34%。为了验证验证响应面分析法的可靠性,用得到的最佳吸附条件对全血中的游离血红蛋白吸附效率进行验证实验,5次平行实验得到的实际平均吸附效率为54.29%,与理论值相差0.05%。基于理论值和实际值微小的差别可得出结论:响应面分析法对全血中游离血红蛋白吸附效率的优化是可行的,得到的吸附效率提取条件有实际应用价值以及可行性。 2.7 SDS-聚丙烯酰胺凝胶电泳分析结果 SDS-聚丙烯酰胺凝胶电泳条带结果如图7所示,稀释的全血样品在5-100 kD范围内存在明显的条带,表明全血中存在白蛋白、球蛋白、细胞色素C以及血红蛋白等多种蛋白质(泳道1,8),经过石墨相氮化碳吸附后这些蛋白条带仍存在,表明石墨相氮化碳实现了对血红蛋白的特异性吸附(泳道2,7),洗脱液中只有一条明显的条带(泳道3,6),其条带和血红蛋白标准溶液条带吻合(泳道4,5),实验结果表明,石墨相氮化碳对可以从人全血样品中特异性地吸附血红蛋白。"
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