目的调查维持性血液透析(Maintenance hemodialysis,MHD)患者不同慢性肾脏病-矿物质和骨代谢异常(Chronic kidney disease-mineral and bone disorder,CKD-MBD)亚型间的人体成分参数,及其与健康相关生活质量评分的关系,为测定MHD患者营...目的调查维持性血液透析(Maintenance hemodialysis,MHD)患者不同慢性肾脏病-矿物质和骨代谢异常(Chronic kidney disease-mineral and bone disorder,CKD-MBD)亚型间的人体成分参数,及其与健康相关生活质量评分的关系,为测定MHD患者营养状态、提高生活质量提供可靠方法及依据。方法采用横断面调查的方法,纳入27种CKD-MBD表型中例数大于10的组别进行统计分析,共纳入分析246例患者。同时对受试者采用生物电阻抗法(Bioelectrical impedance analysis,BIA)进行非同日2次测定人体成分,使用肾脏疾病生活质量专用量表(Kidney disease quality of life short form,KDQOL-SFTM1.3)进行生活质量评分。根据肌肉组织指数(Lean tissue indices,LTI)、脂肪组织指数(Fat tissue indices,FTI)的三分位数分别分为3组进行统计分析。结果第16组LTI、FTI均数分别为(14.68±2.10)kg/m2、(11.63±3.69)kg/m2,LTI高于其余各组,FTI比较差异无统计学意义;L1组生活质量评分最低,L3组生活质量评分最高,FTI各组间生活质量评分差异无统计学意义;LTI、FTI与生活质量评分相关性分析提示有相关性。结论CKD-MBD表型对人体成分参数LTI有影响;LTI、FTI与生活质量评分存在相关性,最佳范围有待进一步研究证实。展开更多
群落净生产力(Net Community Production,NCP)代表了总初级生产力与群落呼吸的差值,是衡量生物活动对上层海洋碳循环影响的重要指标。O_(2)/Ar比值消除了物理过程对海水中溶解氧(O_(2))饱和度的影响,因此基于生物氧饱和度(ΔO_(2)/Ar)...群落净生产力(Net Community Production,NCP)代表了总初级生产力与群落呼吸的差值,是衡量生物活动对上层海洋碳循环影响的重要指标。O_(2)/Ar比值消除了物理过程对海水中溶解氧(O_(2))饱和度的影响,因此基于生物氧饱和度(ΔO_(2)/Ar)可以估算海洋混合层群落净生产力。本研究于2015年10月,首次利用膜进样质谱法走航获取了黄东海表层海水中高分辨率O_(2)/Ar数据,并估算了其NCP,探讨了其分布特征及影响因素。本航次观测到的Δ(O_(2)/Ar)范围为-30.21%~44.38%,平均值为(0.32±8.29)%,低值主要出现在长江口北侧,而长江口(11.75±13.75)%和浙闽沿岸(5.42±5.21)%的Δ(O_(2)/Ar)明显高于南黄海(-2.62±5.96)%和东海陆架区(-0.79±5.02)%。南黄海和东海陆架区平均NCP为(-9.24±23.15)和(-4.04±18.68)mmol·m^(-2)·d^(-1),总体表现为异养状态,而长江口和浙闽近岸NCP均值分别为(24.49±35.74)和(10.85±12.17)mmol·m^(-2)·d^(-1)。东、黄海NCP的空间分布格局主要受到陆源输入和水团混合的影响,营养盐和光照也是秋季影响NCP分布的重要因素。本研究有助于深入认识高度动态的东、黄海碳循环过程及控制机制。展开更多
The experimental results reveal that solubility of cucurbiturils is related with acidity of solution and metal ions. In hydrochloric acid, cucurbituril is the most soluble one, and cucurbituril is the least soluble on...The experimental results reveal that solubility of cucurbiturils is related with acidity of solution and metal ions. In hydrochloric acid, cucurbituril is the most soluble one, and cucurbituril is the least soluble one. There is no significant influence of alkaline metal ion on the solubility of cucurbiturils. The solubility of cucurbituril increases greatly in a SrCl2 solution. However, increase of weight of cucurbiturils suggest that cucurbiturils can catch Ba2+in a solution.展开更多
The electronic structures of N,N′ bis[(1 phenyl 3 methyl 5 oxo 4 pyrazolinyl) α furylmethylidyne]ethylendii mine (and o phenylendiimine), and their complexes of transition metals M (M=Ni, Cu, Co, Pd, Pt) have been c...The electronic structures of N,N′ bis[(1 phenyl 3 methyl 5 oxo 4 pyrazolinyl) α furylmethylidyne]ethylendii mine (and o phenylendiimine), and their complexes of transition metals M (M=Ni, Cu, Co, Pd, Pt) have been calculated by B3LYP method of DFT. Their geometries and bonding characters are discussed, and the relationship between their bioactivities and electronic structures are also discussed from the calculated results of electronic populations and frontier orbital energies.展开更多
文摘目的调查维持性血液透析(Maintenance hemodialysis,MHD)患者不同慢性肾脏病-矿物质和骨代谢异常(Chronic kidney disease-mineral and bone disorder,CKD-MBD)亚型间的人体成分参数,及其与健康相关生活质量评分的关系,为测定MHD患者营养状态、提高生活质量提供可靠方法及依据。方法采用横断面调查的方法,纳入27种CKD-MBD表型中例数大于10的组别进行统计分析,共纳入分析246例患者。同时对受试者采用生物电阻抗法(Bioelectrical impedance analysis,BIA)进行非同日2次测定人体成分,使用肾脏疾病生活质量专用量表(Kidney disease quality of life short form,KDQOL-SFTM1.3)进行生活质量评分。根据肌肉组织指数(Lean tissue indices,LTI)、脂肪组织指数(Fat tissue indices,FTI)的三分位数分别分为3组进行统计分析。结果第16组LTI、FTI均数分别为(14.68±2.10)kg/m2、(11.63±3.69)kg/m2,LTI高于其余各组,FTI比较差异无统计学意义;L1组生活质量评分最低,L3组生活质量评分最高,FTI各组间生活质量评分差异无统计学意义;LTI、FTI与生活质量评分相关性分析提示有相关性。结论CKD-MBD表型对人体成分参数LTI有影响;LTI、FTI与生活质量评分存在相关性,最佳范围有待进一步研究证实。
文摘群落净生产力(Net Community Production,NCP)代表了总初级生产力与群落呼吸的差值,是衡量生物活动对上层海洋碳循环影响的重要指标。O_(2)/Ar比值消除了物理过程对海水中溶解氧(O_(2))饱和度的影响,因此基于生物氧饱和度(ΔO_(2)/Ar)可以估算海洋混合层群落净生产力。本研究于2015年10月,首次利用膜进样质谱法走航获取了黄东海表层海水中高分辨率O_(2)/Ar数据,并估算了其NCP,探讨了其分布特征及影响因素。本航次观测到的Δ(O_(2)/Ar)范围为-30.21%~44.38%,平均值为(0.32±8.29)%,低值主要出现在长江口北侧,而长江口(11.75±13.75)%和浙闽沿岸(5.42±5.21)%的Δ(O_(2)/Ar)明显高于南黄海(-2.62±5.96)%和东海陆架区(-0.79±5.02)%。南黄海和东海陆架区平均NCP为(-9.24±23.15)和(-4.04±18.68)mmol·m^(-2)·d^(-1),总体表现为异养状态,而长江口和浙闽近岸NCP均值分别为(24.49±35.74)和(10.85±12.17)mmol·m^(-2)·d^(-1)。东、黄海NCP的空间分布格局主要受到陆源输入和水团混合的影响,营养盐和光照也是秋季影响NCP分布的重要因素。本研究有助于深入认识高度动态的东、黄海碳循环过程及控制机制。
文摘The experimental results reveal that solubility of cucurbiturils is related with acidity of solution and metal ions. In hydrochloric acid, cucurbituril is the most soluble one, and cucurbituril is the least soluble one. There is no significant influence of alkaline metal ion on the solubility of cucurbiturils. The solubility of cucurbituril increases greatly in a SrCl2 solution. However, increase of weight of cucurbiturils suggest that cucurbiturils can catch Ba2+in a solution.
文摘The electronic structures of N,N′ bis[(1 phenyl 3 methyl 5 oxo 4 pyrazolinyl) α furylmethylidyne]ethylendii mine (and o phenylendiimine), and their complexes of transition metals M (M=Ni, Cu, Co, Pd, Pt) have been calculated by B3LYP method of DFT. Their geometries and bonding characters are discussed, and the relationship between their bioactivities and electronic structures are also discussed from the calculated results of electronic populations and frontier orbital energies.
