Cooperative learning emerging as the leading new approach to classroom instruction abroad over the past decades has been studied by many researchers from all aspects.This paper mainly focuses on the basics of cooperat...Cooperative learning emerging as the leading new approach to classroom instruction abroad over the past decades has been studied by many researchers from all aspects.This paper mainly focuses on the basics of cooperative learning and tries to answer the question that if the use of cooperative learning produce higher achievement than the traditional methods in college English reading class through experimental study.The analysis contributes to better college English teaching and learning.A conclusion is drawn that cooperative learning is very effective in improving college students reading ability.展开更多
目的研究姜黄素与高脂饮食小鼠胆囊胆固醇性结石关系及可能参与调控过程的因子。方法将C57BL6小鼠50只随机分为5组,其中一组予普通饲料,其余四组予高脂饮食饲料,同时灌喂不同剂量姜黄素[0、200、500、1 000 mg/(kg·d)],共4周。计...目的研究姜黄素与高脂饮食小鼠胆囊胆固醇性结石关系及可能参与调控过程的因子。方法将C57BL6小鼠50只随机分为5组,其中一组予普通饲料,其余四组予高脂饮食饲料,同时灌喂不同剂量姜黄素[0、200、500、1 000 mg/(kg·d)],共4周。计算小鼠胆囊结石成石率,收集小鼠血液、胆囊胆汁、胆囊、肝脏以及小肠。计算胆囊容积,称量肝脏质量,检测血液及胆汁胆固醇、甘油三酯等生化指标。用Realtime PCR及Western blotting方法分别检测小鼠小肠上皮NPC1L1及SREBP2 m RNA及蛋白表达。结果姜黄素能够降低小鼠胆囊结石的发生,大剂量姜黄素可降低胆囊结石发生率达60%,同时降低肝脏脂肪变性程度,降低小鼠血液胆固醇饱和度。同时,姜黄素可以抑制高脂饮食所致的NPC1L1 m RNA表达上调[(2.65±0.04)vs(2.06±0.07),(1.69±0.06),(1.33±0.05),P<0.01],且呈现剂量依赖关系,降低高脂饮食所致的NPC1L1蛋白高表达。姜黄素还可以抑制高脂饮食所致的SREBP2 m RNA表达上调[(1.34±0.08)vs(1.39±0.03),(1.19±0.01),(1.06±0.03),P<0.05],且呈现剂量依赖关系,降低高脂饮食所致的SREBP2蛋白表达上调。结论姜黄素能够降低高脂饮食小鼠胆囊结石的形成,NPC1L1和SREBP2可能参与了这个过程。展开更多
文摘Cooperative learning emerging as the leading new approach to classroom instruction abroad over the past decades has been studied by many researchers from all aspects.This paper mainly focuses on the basics of cooperative learning and tries to answer the question that if the use of cooperative learning produce higher achievement than the traditional methods in college English reading class through experimental study.The analysis contributes to better college English teaching and learning.A conclusion is drawn that cooperative learning is very effective in improving college students reading ability.
文摘目的研究姜黄素与高脂饮食小鼠胆囊胆固醇性结石关系及可能参与调控过程的因子。方法将C57BL6小鼠50只随机分为5组,其中一组予普通饲料,其余四组予高脂饮食饲料,同时灌喂不同剂量姜黄素[0、200、500、1 000 mg/(kg·d)],共4周。计算小鼠胆囊结石成石率,收集小鼠血液、胆囊胆汁、胆囊、肝脏以及小肠。计算胆囊容积,称量肝脏质量,检测血液及胆汁胆固醇、甘油三酯等生化指标。用Realtime PCR及Western blotting方法分别检测小鼠小肠上皮NPC1L1及SREBP2 m RNA及蛋白表达。结果姜黄素能够降低小鼠胆囊结石的发生,大剂量姜黄素可降低胆囊结石发生率达60%,同时降低肝脏脂肪变性程度,降低小鼠血液胆固醇饱和度。同时,姜黄素可以抑制高脂饮食所致的NPC1L1 m RNA表达上调[(2.65±0.04)vs(2.06±0.07),(1.69±0.06),(1.33±0.05),P<0.01],且呈现剂量依赖关系,降低高脂饮食所致的NPC1L1蛋白高表达。姜黄素还可以抑制高脂饮食所致的SREBP2 m RNA表达上调[(1.34±0.08)vs(1.39±0.03),(1.19±0.01),(1.06±0.03),P<0.05],且呈现剂量依赖关系,降低高脂饮食所致的SREBP2蛋白表达上调。结论姜黄素能够降低高脂饮食小鼠胆囊结石的形成,NPC1L1和SREBP2可能参与了这个过程。
