39 research outputs found

    NMR联用HILIC-UPLC-MS/MS测定TNBS诱导的结肠炎大鼠尿液和血浆代谢物变化

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    目的基于非靶标和靶标代谢组学技术,探讨三硝基苯磺酸(TNBS)诱导的结肠炎模型大鼠尿液以及血浆中内源性代谢物的变化。方法16只雄性SD大鼠随机分成对照组和模型组,每组8只,对模型组大鼠给予TNBS灌肠以建立实验性大鼠结肠炎模型。利用核磁共振氢谱(1H NMR)检测两组大鼠尿液代谢物,同时联用HILIC模式超高效液相色谱串联三重四级杆质谱(HILIC-UPLC-MS/MS)测定以上大鼠尿液以及血浆中氨基酸水平,并通过多元变量统计方法对代谢组学数据进行分析。结果同对照组相比,1H NMR结果表明模型组大鼠尿液代谢轮廓发生明显改变,其中丙酮酸、甲酸、甲胺与柠檬酸水平升高,氧化三甲胺和丙二酸水平降低(均P < 0.05);HILIC-UPLC-MS/MS结果显示模型组大鼠尿液中苯丙氨酸、组氨酸水平显著上升,血浆中赖氨酸、精氨酸、苯丙氨酸、亮氨酸、甘氨酸、色氨酸、脯氨酸、组氨酸和酪氨酸水平显著升高,但谷氨酰胺、缬氨酸、丙氨酸和异亮氨酸水平明显降低(均P < 0.05)。结论经TNBS诱导的结肠炎模型大鼠,其能量代谢、胺类代谢以及氨基酸代谢通路受到影响;采用的1H NMR与HILIC-UPLC-MS/MS联用的多元代谢组学方法,揭示了结肠炎大鼠尿液及血浆代谢物的变化,为炎症性肠病的机制研究与相关生物标志物的探索提供了新的思路

    Reaction of p-Chloronitrobenzene Adsorbed on Silver Nanoparticles

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    Corresponding author. Email: [email protected]; Tel: +86-592-2189023[中文文摘]表面增强拉曼光谱(SERS)具有极高的检测灵敏度,通过检测吸附分子的SERS信号,可以获得表面吸附分子的结构以及可能发生的反应.在拉曼激发光源的辐射下,在碱性溶液中,银纳米粒子表面吸附的对氯硝基苯(PCNB)的SERS光谱与其固体的常规拉曼光谱相比,出现异常SERS谱.通过采用密度泛函理论(DFT)计算,对PCNB以及可能的偶联产物p,p′-二氯偶氮苯(DCAB)进行理论分析以及谱峰归属,发现这些异常峰来自其偶联产物DCAB的偶氮C-N=N-C基团的基频振动. [英文文摘]Surface-enhanced Raman spectroscopy (SERS) on silver nanoparticles is highly sensitive because of surface plasmon resonance. We have studied the structures and photoinduced chemical reactions of p-chloronitrobenzene (PCNB) molecules adsorbed on silver nanoparticles using a combination of SERS and density functional theory (DFT) calculations. When the PCNB molecules are adsorbed to the surface of silver nanoparticles in alkaline solution, the SERS spectra are very different from the normal Raman spectra of PCNB. Comparison of the DFT simulated Raman spectra of PCNB and p,p-dichloroazobenzene (DCAB) indicates that the new peaks in the SERS spectrum of PCNB adsorbed on silver nanoparticles arise from the azo (C-N=N-C) group of DCAB.国家自然科学基金(20973143, 91027009, 21021002);国家重点基础研究发展规划项目(973)(2009CB930703);厦门大学(2010121020

    Comparative Research on Student' s Physical Function Changes in Minority Traditional Sports and Modern Sports Teaching

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    依循体育教学的“教育目标”和民族院校体育特色教学的实际 ,运用运动心理实验研究方法 ,试图探讨少数民族传统体育纳入学校体育教学可行性与现代体育相结合教学实验研究 ,以揭示学生学习过程中手的动作稳定性 ,动作技能迁移和记忆灵敏度及意志力的培养与体育教学的内在关系 ,为全面改革高校体育教学提供心理学依据。 We owe social progress and development to Chinese continual reforms and achievement s , which depend on their theoretical basis .It is in view of the national higher education reforms and position of sports that this thesis deals with the ef fect and possibility of minorty traditional sport s becoming one of the sports courses in colleges and universities , traditional and mordern sports teaching , check of students′constitution , sport s psychology , sport s physiology , sports biochemistry and changes of functions .The purpose is to enable sports teaching to meet the needs of the high -technology society

    高校短跑教学中跑的放松技术

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    专业短跑运动员掌握跑的放松技术是提高成绩的关键之一,在普通高校的短跑教学中,同样也起重要作用,它不但需要掌握完整的技术概念,而且也要有力量、速度、协调性等素质

    民族传统体育在民族院校体育教学中的地位和作用

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    本文就少数民族传统体育在民族院校体育教学中的地位和作用进行了阐述,认为把少数民族传统体育以其简便易学、强身益智、防病治病、休闲娱乐、不受场地器材限制的特点,纳入教学大纲,很受大学生的欢迎和喜

    壮族传统体育活动特征与发展趋向

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    本文重点对壮族传统体育活动的特征及面向新世纪的发展趋向进行阐述与研究

    论龙舟竞渡在《全民健身计划》中的地位和作用

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    龙舟竞渡是我国各民族喜闻乐见的传统体育项目,历时几千年延续不断,它含蕴着中华民族深刻的文化内涵,它深刻地反映着中华民族合力拼搏,奋发图强的群众意识,凝集着中华民族的科学、艺术、文学、体育的聪明和智慧。在二十一世纪即将来临之际,全国将要进行规模宏大的全民健身计划,以体育来提高全民族的素质,此举不仅对中华民族的发展有着深刻的意义,而且对促进整个人类素质也有着重要的意义。本文旨在论少数民族传统体育的龙舟竞渡在《全民健身计划》实施中地位和作用,并就开展龙舟竞渡弘扬中华民族的优秀文化,振奋民族精神,促进体育事业和国民经济发展进行初步探讨

    Development of Dragon-boat Regatta and Its Skill in Point of the Sixth Traditional Chinese Sports Games

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    通过对 1999年第 6届全国“民运会”龙舟赛的研究 ,分析龙舟运动技术的发展模式。对运动员的选材、训练的结构模式、划桨技术进行了深入探讨.Trough studies on the Sixth National Dragon-boat Regatta 1999, an analysis of the developing pattern of dragon-boat skill is made with a further exploration of the selections of athletes, structural patterns of training and oaring skill

    Study of Dragon Boat Sporters'Certain Physiological Characteristics

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    通过测定龙舟运动员的身体形态机能、生理和生化等指标。结果显示 :龙舟运动能增强运动员心脏机能 ,肺活量和上肢、腰腹力量。旨为我国龙舟运动科学选材、训练及技术发展 ,提供理论参考依据。The author has surveyed the Dragon Boat sporters'certain physiological characteristics and the key element of the athletic level's improvement by ten years't raining summing up the experience of three times'internal and international Dragon Boat race.The result showed that Dragon Boat sport increased physical function and strength.The study provides valuable reference basis for the development of Dragon Boat sport
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