氮平衡

基于DSS的1978-2005年中国区域农田生态系统氮平衡

Nitrogen balance in agro-ecosystem in China from 1978 to 2005 based on DSS

A组的氮平衡明显优于B组，肾功能明显差于B组。

The nitrogen balance of group A was better than that of group B , while the renal function of group B was better than that of group A.

试验采用氮平衡试验研究产蛋高峰期罗曼公、母鸡的氮维持需要量（Nm），并分析公、母鸡氮代谢的变化规律。

The nitrogen requirement for maintenance ( Nm ) was determined by nitrogen balance .

在血清白蛋白、血红蛋白及氮平衡方面则明显优于肠外营养组（P均＜0.05）。

With regard to albumin and hemoglobin levels and nitrogen equilibrium , enteral nutrition group was superior to parenteral nutrition group ( all P < 0 05 ) .

本试验采用氮平衡试验法和无氮日粮法研究了绍鸭的氮维持需要（Nm）。

The nitrogen requirement for maintenance ( N m ) was determined by nitrogen balance trial and nitrogen-free experiment respectively .

结果MCT组肌肉利用脂肪乳的能力明显提高，氮平衡也有所改善，且术后体重减轻较少。

Results Muscle utilization was significantly improved with MCT administration .

结果提示：术后三组平均每天的负氮平衡分别为：A组-12.34g；B组-6.59g；

The results showed that the average negative nitrogen balance in group A , B , C was respectively -12.34 g / d , -6.59 g / d and -4.84 g / d after operation .

氮平衡试验表明，IL可提高干物质消化率和氮利用效率。

From the N balance trials , it can be inferred that broiler reared under IL have improved DM digestibility andefficancy of dietal N retention .

NS组手术后体重、血清蛋白回升较NT组明显提前，由负氮平衡向正氮平衡恢复所需时间较NT组明显缩短。

The recovery of body weight , level of plasma albumen and nitrogen balance in NS group was faster than that of NT group .

目的研究20S蛋白酶在烧伤后负氮平衡形成机制中的作用。

Objective To study the role of20S protease in the formation of negative nitrogen balance after burn injury .

SPAC系统中氮平衡及其模拟模型

Nitrogen Balance in SPAC System and the Simulative Model

氮平衡明显改善，与常规TPN组相比差异显著（P<0.01）；

Nitrogen balance was better in glutamine-supplemented TPN group , there were significantly difference ( P < 0.01 ) .

目的研究含不同脂肪乳剂（fatemulsion，FE）的肠外营养（Parenteralnutrition，PN）对肝移植大鼠脂代谢及氮平衡影响。

Objective To study the influence of parenteral nutrition ( PN ) containing different kinds of fat emulsion ( FE ) on nitrogen balance and lipid metabolism in rats after liver transplantation .

结论：根治性胃大部切除术后短期PN支持并不延迟病人残胃排空的恢复，而且能减轻术后负氮平衡状况。

Conclusions : Short period PN after radical distal subtotal gastrectomy will not delay the recovery of gastric stump emptying and it can improve the nutritional status of patients obviously .

结果显示：（1）rGH促进正氮平衡恢复，提高了血浆白蛋白水平；

RGH accelerated regaining of the positive nitrogen equilibrium , improved plasma albumin level .

结果：EN组氮平衡高于TPN组，机械通气时间、临床费用低于TPN组，组间差异均有显著性（P0.05）。

Results : As compared with TPN group , nitrogen balance was increased and mechanical ventilation time and treatment cost were decreased in EN group ( P 0.05 ) .

结果：A组患者治疗后血清白蛋白和氮平衡明显升高（P<0.01），24h尿氮明显降低（P<0.01）。

Results : The serum albumen and nitrogen balance increased significantly ( P < 0.01 ), and urine nitrogen in 24 hours decreased significantly ( P < 0.01 ) .

结果：用自制匀浆膳2周后病人均达到正氮平衡，GCS评分为（13.7±3.4）；

Results : All patients who received homogenate diet reached positive nitrogen balance 2 weeks later . The score of GCS is ( 13.7 ± 3.4 ).

其和Gln具有相同的维持血浆Gln正常水平、改善氮平衡及小肠粘膜形态的作用。

It has the same role as glutamine of preserving normal glutamine level , improving nitrogen balance and shape of small intestinal mucosa .

AAM组术后可达到氮平衡，而PRH组为负平衡。

In AAM series a nitrogen equilibrium was reached while in PRH series was a negative equilibrium .

阐述了固定床煤气化炉采用富氧连续气化技术的进展情况，并作了技术经济分析。术后吸氧72h及TPN支持以恢复正氮平衡。

The paper elaborates the development of the fix bed gasifier use rich oxygen continuous gasification , the advantages and disadvantages , techno economic analysis . 〔

分别在静脉营养治疗的前1d、治疗后第4、7、14d测定氮平衡、营养指标、免疫功能指标和患者耐受性指标。

Nitrogen balance , nutrition , immune functions and patient tolerance parameters were determined at pre treatment and 4th , 7th , 14th days after treatment .

结果在上臂肌围和三头肌皮皱厚度、Alb、Hb及氮平衡方面，EN组与PN组的差别均无显著性意义（均P0.05）。

Results No difference was observed between the two groups in the muscular perimeter of the upperarm and the thickness of derma-wrinkles of musculus triceps brachii , serum albumin , hemoglobin and nitrogen equilibrium .

实施EEN和TPN的第14天，两组均达到了正氮平衡，EEN组在第21天体重指数高于TPN组。

Both group achieved the positive nitrogen balance at day 14 , BMI of EEN at day 21 was higher than that of TPN ( P0.05 ) .

肠内营养组患者的累积氮平衡为＋70±7mg／kg，胃肠内营养组优于肠外营养组（P＜0.05）。

Cumulative nitrogen balance was - 82 ± 51mg · kg-1 / d in the parenteral nutrition group vs + 70 ± 7mg · kg-1 / d in the enteral nutrition group ( P < 0.05 ) .

我们应用腹腔感染诱发多器官衰竭（MOF）的动物模型观察不同热量全肠外营养（TPN）对MOF兔的器官功能、氮平衡和蛋白质分解代谢的影响。

Rabbits with MOF induced by intraab-dominal sepsis were used to observe the effect of TPN with different amount of calorie on organ function , nitrogen balance and protein catabolism .

于PN后1、4、7d收集标本，检测氮平衡、血脂、肝组织脂类的变化。

The specimen of blood , urine , and liver tissues were obtained at days 1,4 and 7 after PN for determining changes of nitrogen balance , blood fat and liver tissue lipid .

结论TNFα对烧伤后大鼠骨骼肌中26S蛋白酶复合体系统的激活具有重要作用，从而加强蛋白质的分解代谢，这可能与烧伤后负氮平衡的发生密切相关。

Conclusion TNF α activates the 26S proteasome system in skeletal muscle , thus it enhances the degradation of protein , which is associated with the development of negative nitrogen balance following scalding .

结果：TEN组血清清蛋白、血红蛋白、氮平衡方面明显优于TPN组（P0.05）。机械通气时间和临床费用低于TPN组（P0.05）。

Results : with regard to albumin and hemoglobin levels and nitrogen equilibrium TEN group was superior to parenteral nutrition group ( P 0.05 ), Mechanical ventilation time and treatment cost were decreased in TEN group ( P 0.05 ) .

利用OECD表观氮平衡模型框架，建立了中国表观氮磷平衡核算的框架、方法和数据库。

By applying OECD surface soil nitrogen balance methodology , the framework , methodology and database for nutrient balance budget in China are established to evaluate the impact of nutrient balance on agricultural production and water environment .