目的探讨慢性肾脏病患者饮食磷摄入情况,并分析饮食中磷摄入量对血营养指标及钙磷代谢相关指标的影响。方法以2018年12月至2019年11月成都市某医院诊治的慢性肾脏病患者为研究对象,进行基本资料收集、3 d 24 h膳食调查、营养状态评估及...目的探讨慢性肾脏病患者饮食磷摄入情况,并分析饮食中磷摄入量对血营养指标及钙磷代谢相关指标的影响。方法以2018年12月至2019年11月成都市某医院诊治的慢性肾脏病患者为研究对象,进行基本资料收集、3 d 24 h膳食调查、营养状态评估及血生化指标检测,采用描述流行病学分析方法对慢性肾脏病患者饮食磷摄入量进行分析。结果共对151例慢性肾脏病患者进行研究,患者年龄25~75岁,以60~75岁为主,占64.9%,男女性别比为1.25∶1,疾病分期以3期为主,占49.0%,原发病以肾小球肾炎为主,占70.9%,主观营养评估(SGA)法评定结果以B级(可疑营养不良)为主,占86.1%。饮食磷摄入量以中等水平(600~800 mg/d)为主,占58.6%,其次是高水平(>800 mg/d),占23.6%,摄入量低水平(<600 mg/d)的占17.8%。不同饮食磷摄入量的慢性肾脏病患者白蛋白、前白蛋白、血磷、血磷钙乘积指标差异均有统计学意义(均P<0.01),转铁蛋白、血钙水平在不同饮食磷摄入量慢性肾脏病患者中的差异均无统计学意义(均P>0.05)。血磷及血钙磷乘积与饮食磷摄入量呈正相关(rs=0.736、0.809,均P<0.05)。结论饮食磷摄入量对慢性肾脏病患者的营养状况和磷代谢有一定影响,慢性肾脏病患者应注意按营养师的指导注意挑选钾含量较低的食物,在保证机体生理需求前提下,有效控制磷的摄入量,预防高磷血症的发生。展开更多
This paper describes a time series experiment examining the nitrogen and phosphorus intake of natural phytoplankton communities by a microcosms approach.Seawater samples containing natural phytoplankton communities we...This paper describes a time series experiment examining the nitrogen and phosphorus intake of natural phytoplankton communities by a microcosms approach.Seawater samples containing natural phytoplankton communities were collected from waters around Baozhu Islet in inner Xiamen Bay and around Qingyu Islet in the outer bay.The goal was to elucidate the relationship between phytoplankton population enhancement,the biological removal of nitrogen and phosphorus from the seawater,and the phytoplankton nitrogen and phosphorus intake ratio based on nitrogen and phosphorus removal from seawater by phytoplankton,to provide a basis for detecting prewarning conditions for red tide and the assessment of red tide events.Two key results were obtained:1.During the experiment,the nitrogen and phosphorus seawater concentrations in samples from these two sites were negatively and closely correlated to the logarithm of the phytoplankton cell concentration and to the value of the apparent oxygen increment.The ratio of the intake coefficients was 3.5:1 for phosphorus and 1.1:1 for nitrogen for the phytoplankton between these samples from around Baozhu Islet and Qingyu Islet,respectively.This indicates that the intake capabilities of phytoplankton for nitrogen in the two waters are essentially identical.However,for phosphorus,the capability was much higher in the Baozhu Islet waters than the Qingyu Islet waters.In other words,the phytoplankton in Qingyu Islet waters produced more biomass while consuming the same amount of phosphorus as the other waters;2.The phytoplankton nitrogen and phosphorus intake ratio from the Baozhu Islet and Qingyu Islet waters was 20:1 and 36:1,respectively.The latter waters had a significantly higher ratio than the former and both were higher than the Redfield Ratio.These results indicate that nitrogen and phosphorus intake ratios by phytoplankton can vary significantly from region to region.展开更多
基金Supported by the Commonweal Program for the Institute (No. 2004DIB3J084)908 Project (No. 02-02-01 special subject)the Program of Chinese Marine Chemistry Investigation and Research (No. 908-ZC-I-03)
文摘This paper describes a time series experiment examining the nitrogen and phosphorus intake of natural phytoplankton communities by a microcosms approach.Seawater samples containing natural phytoplankton communities were collected from waters around Baozhu Islet in inner Xiamen Bay and around Qingyu Islet in the outer bay.The goal was to elucidate the relationship between phytoplankton population enhancement,the biological removal of nitrogen and phosphorus from the seawater,and the phytoplankton nitrogen and phosphorus intake ratio based on nitrogen and phosphorus removal from seawater by phytoplankton,to provide a basis for detecting prewarning conditions for red tide and the assessment of red tide events.Two key results were obtained:1.During the experiment,the nitrogen and phosphorus seawater concentrations in samples from these two sites were negatively and closely correlated to the logarithm of the phytoplankton cell concentration and to the value of the apparent oxygen increment.The ratio of the intake coefficients was 3.5:1 for phosphorus and 1.1:1 for nitrogen for the phytoplankton between these samples from around Baozhu Islet and Qingyu Islet,respectively.This indicates that the intake capabilities of phytoplankton for nitrogen in the two waters are essentially identical.However,for phosphorus,the capability was much higher in the Baozhu Islet waters than the Qingyu Islet waters.In other words,the phytoplankton in Qingyu Islet waters produced more biomass while consuming the same amount of phosphorus as the other waters;2.The phytoplankton nitrogen and phosphorus intake ratio from the Baozhu Islet and Qingyu Islet waters was 20:1 and 36:1,respectively.The latter waters had a significantly higher ratio than the former and both were higher than the Redfield Ratio.These results indicate that nitrogen and phosphorus intake ratios by phytoplankton can vary significantly from region to region.
