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41.
To optimize the hydrolysis conditions to prepare hydrolysates of jellyfish umbrella collagen with the highest hydroxyl radical scavenging activity, collagen extracted from jellyfish umbrella was hydrolyzed with trypsin, and response surface methodology (RSM) was applied. The optimum conditions obtained from experiments were pH 7.75, temperature (7) 48.77 ℃, and enzyme-to-substrate ratio ([E]/[S]) 3.50%. The analysis of variance in RSM showed that pH and [E]/[S] were important factors that significantly affected the process (P<0.05 and P<0.01, respectively). The hydrolysates of jellyfish umbrella collagen were fractionated by high performance liquid chromatography (HPLC), and three fractions (HF-1>3000 Da, 1000 Da相似文献
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胶原—磷酸钙复合物是最重要的人工骨框架材料。植入体内的材料结构对材料的生物降解、诱导新骨的生长具有重要的影响.通过透射电镜、扫描电镜、能谱分析等方法,研究了胶原—磷酸钙复合物结构随时间的变化关系,分析了复合物在静止状态和搅拌状态下结构变化的成因. 相似文献
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川芎嗪对糖尿病大鼠骨质疏松的保护作用 总被引：2，自引：0，他引：2
探讨川芎嗪对糖尿病大鼠骨质疏松的保护作用.选择健康SD大鼠,随机分为正常对照组、糖尿病(DM)模型组和治疗组.一次性腹腔注射链脲佐菌素60mg/kg诱发糖尿病.HE染色观察股骨头结构变化;VanGieson氏染色法观察骨胶原纤维;紫外分光光度法测定醛糖还原酶(AR)、骨羟脯氨酸(B-HYP)和甲状旁腺激素(PTH)的含量.结果,DM模型组大鼠AR和PTH含量显著增高(P<0.01).B-HYP含量显著降低(P<0.01).胶原纤维减少,川芎嗪可逆转上述改变(P<0.01).结果表明,川芎嗪对糖尿病大鼠骨质疏松有一定的治疗作用. 相似文献
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Nalini Ganesan Hariprasad Chegu A. N. Chandrasekaran 《Indian journal of clinical biochemistry : IJCB》2003,18(2):216-222
Adjuvant induced arthritis (AIA) is a model widely used to study Rheumatoid arthritis (RA). In the present study, lipid peroxides
level in spleen and thymus of AIA rats was observed to be significantly high compared to normal rats. A significant decrease
in ascorbic acid (ASA), reduced glutathione (GSH), superoxide dismutase activity (SOD) was also observed in spleen and thymus
of AIA rats compared to normal rats. There was also a steady increase in the circulating immune complex level (CIC) throughout
the experimental period in serum of AIA rats. In the present investigation, it was decided to study the effect of pre and
post treatment with TYPE II collagen on the antioxidant status and the circulating immune complex level in AIA rats. The results
from the present work indicates that the pretreatment with TYPE II collagen was effective in bringing significant changes
on all the parameters studied in AIA rats. The post treatment with TYPE II collagen was effective in bringing significant
changes on the CIC immune complex level and GSH content in the thymus tissue of AIA rats. The present work suggests that the
pre treatment with TYPE II collagen was more effective in suppressing the disease than the post treatment. 相似文献
45.