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C5-6、T12-L1、L4-5椎间盘与相邻椎体的压缩力学特性 被引量:9
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作者 李建军 张远石 +2 位作者 王溪源 赵宝林 马洪顺 《生物医学工程研究》 2010年第3期193-196,共4页
对比分析C5-6、T12-L1、L4-5椎间盘与相邻椎体的压缩力学性质,确定不同部位的椎间盘与相邻椎体是否具有不同的压缩力学性质。人死后1 h内解剖取出死者C1-S1脊柱标本,以线锯切取C5-6、T12-L1、L4-5椎间盘与相邻椎体标本各13个。在日本岛... 对比分析C5-6、T12-L1、L4-5椎间盘与相邻椎体的压缩力学性质,确定不同部位的椎间盘与相邻椎体是否具有不同的压缩力学性质。人死后1 h内解剖取出死者C1-S1脊柱标本,以线锯切取C5-6、T12-L1、L4-5椎间盘与相邻椎体标本各13个。在日本岛津电子万能实验机上进行实验。实验速度为5mm/min,以统计分析和t检验的方法处理实验数据。L4-5组椎间盘与相邻椎体最大载荷大于T12-L1和C5-6组,差异显著(P<0.01);C5-6组最大位移大于L4-5组和T12-L1组,差异显著(P<0.01);L4-5组椎间盘与相邻椎体最大应力大于C5-6和T12-L1组,差异显著(P<0.01);C5-6组椎间盘与相邻椎体最大应变大于L4-5和T12-L1组,差异显著(P<0.01)。C5-6、T12-L1、L4-5椎间盘与相邻椎体标本的压缩力学性质有一定区别。 展开更多
关键词 人脊柱 C5-6 T12-l1 L4-5 压缩 力学性质 对比分析
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CAS FGOALS-f3-L model dataset descriptions for CMIP6 DECK experiments
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作者 HE Bian YU Yongqiang +12 位作者 BAO Qing LIN Pengfei LIU Hailong LI Jinxiao WANG Lei LIU Yimin WU Guoxiong CHEN Kangjun GUO Yuyang ZHAO Shuwen ZHANG Xiaoqi SONG Mirong XIE Jinbo 《Atmospheric and Oceanic Science Letters》 CSCD 2020年第6期582-588,共7页
The datasets of the Chinese Academy of Sciences(CAS)Flexible Global Ocean–Atmosphere–Land System(FGOALS-f3-L)model for the baseline experiment of the fully coupled runs in the Diagnostic,Evaluation and Characterizat... The datasets of the Chinese Academy of Sciences(CAS)Flexible Global Ocean–Atmosphere–Land System(FGOALS-f3-L)model for the baseline experiment of the fully coupled runs in the Diagnostic,Evaluation and Characterization of Klima(DECK)common experiments of phase 6 of the Coupled Model Intercomparison Project(CMIP6)are described in this study.The CAS FGOALS-f3-L model team submitted the pi Control run with a near equilibrium ocean state for 561 model years,and 160-year integrations for three ensemble members of abrupt-4×CO2 and 1pct CO2,respectively.The ensemble members restart from the 600,650 and 700 model years in the pi Control run,respectively.The baseline performances of the model are validated in this article.The preliminary evaluation suggests that the CAS FGOALS-f3-L model can preserve the long-term stability well for a mean net radiation flux of 0.31 W m-2at the top of the atmosphere,and a limited decreasing trend of-0.03 W m-2/100 yr.The global annual mean SST is 16.45°C for the 561-year mean,with an increase of 0.03°C/100 yr.The model captures the basic spatial patterns of climate-mean SST and precipitation,but still underestimates the SST over the warm pool.The coupled model mitigates the precipitation bias in the ITCZ compared with the results from CMIP5.Moreover,the model’s climate sensitivity represented by the equilibrium climate sensitivity has been reduced from 4.5°C in CMIP5 to 3.0°C in CMIP6.All these datasets contribute to the benchmark of model behaviors for the desired continuity of CMIP. 展开更多
关键词 CMIP6 DECK FGOALS-f3-l piControl abrupt-4×CO2 1pctCO2 climate sensitivity
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短链脂肪酸通过ANGPTL4、ANGPTL6分子抑制3T3-L1前脂肪细胞分化成熟及脂肪储存 被引量:6
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作者 郭静 卢宗亮 +4 位作者 王贺 朱明星 吴长蓬 张梦媛 许红霞 《营养学报》 CAS CSCD 北大核心 2020年第1期49-55,67,共8页
目的研究短链脂肪酸(short chain fatty acids,SCFAs)是否直接影响3T3-L1前脂肪细胞的分化成熟及脂肪储存,以及该过程中血管生成素样蛋白4(angioprotein-like protein 4,ANGPTL4)和血管生成素样蛋白6(angioprotein-like protein 6,ANGPT... 目的研究短链脂肪酸(short chain fatty acids,SCFAs)是否直接影响3T3-L1前脂肪细胞的分化成熟及脂肪储存,以及该过程中血管生成素样蛋白4(angioprotein-like protein 4,ANGPTL4)和血管生成素样蛋白6(angioprotein-like protein 6,ANGPTL6)分子mRNA和蛋白的表达变化,探讨SCFAs与脂肪细胞成熟及脂肪储存过程中ANGPTL4和ANGPTL6表达的相互关系。方法体外培养3T3-L1前脂肪细胞,光镜及油红O染色观察SCFAs(乙酸或丙酸)干预对脂肪细胞分化成熟及脂滴形成的影响;并在诱导过程中(第0、4、8、12日)分别采用Real-time PCR和Western blot检测ANGPTL4、ANGPTL6的mRNA和蛋白表达水平。si-RNA转染技术检测是否ANGPTL4参与了乙酸和丙酸对脂肪细胞分化成熟的作用。结果光镜及油红O染色显示2 mmol/L乙酸或4 mmol/L丙酸干预明显抑制3T3-L1细胞的分化成熟及脂滴形成;在3T3-L1细胞分化成熟过程中,ANGPTL4、ANGPTL6的mRNA及蛋白表达随细胞成熟逐步下调;乙酸和丙酸处理组,细胞第8日和12日时ANGPTL4及ANGPTL6 mRNA水平及蛋白水平较对照组均显著升高(P<0.05)。ANGPTL4 si-RNA转染削弱了乙酸及丙酸对前脂肪细胞分化成熟的抑制。结论乙酸和丙酸能抑制3T3-L1前脂肪细胞的分化成熟及脂肪储存,其机制可能经由ANGPTL4及ANGPTL6介导。 展开更多
关键词 短链脂肪酸 肥胖 ANGPTL4 ANGPTL6 3T3-l1细胞
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Flavonoids kaempferide and 4,2’-dihydroxy-4’,5’,6’-trimethoxychalcone inhibit mitotic clonal expansion and induce apoptosis during the early phase of adipogenesis in 3T3-L1 cells
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作者 Supakanya Kumkarnjana Rutt Suttisri +4 位作者 Ubonthip Nimmannit Apirada Sucontphunt Mattaka Khongkow Thongchai Koobkokkruad Nontima Vardhanabhuti 《Journal of Integrative Medicine》 SCIE CAS CSCD 2019年第4期288-295,共8页
Objective: Kaempferide and 4,2'-dihydroxy-4',5',6'-trimethoxychalcone (DTMC) are two major flavonoids found in Chromolaena odoraia Linn, leaf extract. The aim of this study was to elucidate the mechani... Objective: Kaempferide and 4,2'-dihydroxy-4',5',6'-trimethoxychalcone (DTMC) are two major flavonoids found in Chromolaena odoraia Linn, leaf extract. The aim of this study was to elucidate the mechanism by which these two flavonoids exerted their effect on adipogenesis. The inhibitory effect of kaempferide and DTMC on adipocyte differentiation and their mechanisms involving mitotic clonal expansion (MCE) and apoptosis during the early stage of adipogenesis were investigated. Methods: Confluent 3T3-L1 preadipocytes were induced to differentiate and exposed to the flavonoids during various phases of difTerentiaiion. Intracellular lipid accumulation, cell density and expression of the transcription factors peroxisome proliferator-activated receptor γ and CCAAT/enhancer-binding pro-teins a were assessed using AdipoRed, Oil red 0 and Western blot assays. Effects of both flavonoids on cell proliferation and apoptosis were also determined by carboxyfluorescein diacetate succinimidyl ester and annexin V-fluorescein isothiocyanate/propidium iodide-staining assays, respectively. Results: Kaempferide and DTMC showed significant, concentration-dependent anti-adipogenic activity and effect on cell density in the early phase of adipogenesis. The expression of the transcription factors seemed to be reduced when the treatment was prolonged or in the early phase of adipogenesis. These flavonoids interrupted MCE via inhibition of preadipocyte proliferation and induction of apoptosis. DTMC was nearly three times more potent than kaempferide in inducing apoptosis. Conclusion: Kaempferide and DTMC exerted their anti-adipogenic activity through inhibition of MCE, either by suppressing cell proliferation or by inducing apoptosis during the early phase of differentiation. 展开更多
关键词 Kaempferide 4 2'-Dihydroxy-4' 5' 6'-trimethoxychalcone MITOTIC CLONAL expansion Apoptosis Anti-adipogenic 3T3-l1 ADIPOCYTES
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