尿素
- 名urea;carbamide
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[carbamide;urea] 一种极易溶的结晶含氮化合物CO(NH 2 ) 2 ,在自然界中由蛋白质分解形成,工业上通常由氨和二氧化碳在加压下加热而合成,是人和其他哺乳动物的尿的主要固体成分。用于各种化学合成、肥料以及动物饲料中
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添加皮革蛋白粉对血液尿素氮无显著影响(P>0.05)。
Leather protein meal supplementation had no significant effect on blood urea nitrogen ( P0.05 ) .
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尿素包接法预浓缩α-维生素E的试验研究
Preconcentration of α - Vitamin E Using Urea Inclusion Method
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斯塔米卡邦CO2汽提尿素工艺新改进
New improvement of stamicarbon 's co_2 stripping urea process
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CO2汽提法尿素生产应注意的问题
Problems to be Attentive in Urea Production with CO _ 2 Stripping Method
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饲喂尿素饲料,瘤胃液PH值在正常生理范围内变动(6.29-7.46)。
The PH values in the rumen liquid were within the normal physiological range ( 6.29-7.46 ) .
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CO2汽提法与NH3汽提法尿素装置汽提塔的分析比较
Analyzing of CO_2 Stripper and NH3 Stripper in Urea Plant
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研究了温度和pH值对酶活性的影响及过氧化氢和尿素对固定化酶的抑制作用。
It was investigated that the immobilized catalase was affected by temperature and pH and inhibited by hydrogen peroxide .
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浅谈对尿素合成塔CO2转化率的认识&高压液气(汽)管式快速反应器的应用研究
Discussion on Ratio of Carbon Dioxide Conversion in Urea Reactor : Research on Application of HP Liquid-Gas Tube Reactor
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尿素冷凝液中NH3和CO2分析方法探讨
On the Determination of NH_3 and CO_2 in Urea Condensed Fluid by Conductimetric Titration
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控释尿素与等氮量普通尿素相比,番茄的还原性糖的含量和维生素C含量分别提高了20.5%、62.4%;番茄果实的总酸度降低了24.2%;
Compared with NU with the equal nitrogen application , CRU increased candy and vitamin c content of tomato by 20.5 % and 62.4 % respectively .
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结论13C-尿素呼气试验检测Hp是一种较为简单可靠的方法。
Conclusion 13 C urea breath test is a good kind of method to detect Hp .
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尿素生产中Hydro流化床造粒工艺及其粉尘处理
Hydro Fluidized Bed Urea Granulation Process and Its Dust Control
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~(14)C&尿素呼气试验筛选抗Hp治疗对象
~ ( 14 ) C-urea breath test , a simple method to screen patients needing anti - HP therapy
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一种新型高效脱硫脱碳添加剂(HS)在尿素生产中的应用
Application of a New Type HS Additive to Producing Urea
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尿素颗粒水解及其产生的NH3-NH4+平衡移动是肥斑内土壤水分和pH变化的主要原因。
Hydrolysis of urea granules and shift in the balance of NH3 - were the main reasons that water content of soil and pH value changed .
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其中,与单施尿素相比,两种抑制剂配合使用处理的肥料N总回收率高16.78%,小麦回收高5.96%。
In comparison with applying urea alone , a combined application of hydroquinone and dicyandiamide induced a 16.78 % higher total recovery and 5.96 % higher plant recovery .
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分析了过程中氨基磺酸和尿素用量、反应温度等因素对AES的影响。
Effect of the dosage of aminosulfonic acid and urea and the temperature , etc. on AES was analyzed .
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叙述了利用尿素制NPK尿基复合肥料生产工艺。
A technological process is described for the manufacture of urea-based NPK compound fertilizers .
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而且主观体力感觉等级、肌肉酸痛程度、CK、血尿素及血红蛋白可以作为反映古典摔跤大强度训练的有效指标。
Secondly , RPE , muscle soreness , CK , blood urine and hemoglobin are effective index to reflect Greco-roman wrestlers'exercise .
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7S大豆蛋白尿素变性后在硬木上有较好的湿润性。
7S soy protein modified with urea had the better wettability on hardwood .
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尿素的水解和硝化在14d以前完成。
Urea hydrolysis and nitrification completed within 14 days .
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用凝胶过滤和SDS-PAGE对不同年龄人透明晶状体水溶性蛋白、尿素溶蛋白及纤维细胞膜内在蛋白进行了分析。
Changes of water-soluble , urea-soluble and intrinsic membrane proteins of clear human lenses with ageing were studied by gel filtration and SDS-PAGE .
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以饱和尿素溶液水解工艺制备TiO2煅烧前驱体,在前驱体中引入掺杂氮源,于400~700℃的空气气氛下煅烧2h,制得淡黄色的掺氮TiO2光催化剂;
N-doped TiO2 photocatalysts were prepared by calcinations of the hydrolysis product of tetrabutyl titanate with saturated urea solutions in ambient atmosphere at different temperature .
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土壤施肥对NR的影响表明:追施尿素可以维持叶片较高的NR活性水平,提高叶片对NO3-的同化能力。
Fertilization in soil showed urea could maintain the higher NR activity in leaves and increased the ability of assimilation NO - _3 .
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精料比例达到30%时,血浆尿素氮水平显著降低(P0.05),但均处于正常生理范围内;
When the diet containing 30 % concentrate is fed , the concentration of plasma urea nitrogen begin to reduce , and all numeric values were in the normal physiological range ;
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采用Warthin-Starry染色、快速尿素酶试验或C14尿素呼气试验检测HP的感染情况;
H.pylori was determined with the rapid urease test , Warthin-Starry method or 14C urease breath test ;
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~(14)C-尿素呼吸试验(UBT)评价HP根除效果,DU者重复胃镜检查。
~ ( 14 ) C-urea breath test ( UBT ) was used to evaluate H. pylori eradication . Sixty-two patients were followed up .
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观察两组尿中尿素氮(UUN)、血清蛋白及生长激素(GH)、术后疲倦综合征(POFS)记分。
The urine UN , blood albumin and GH , body weight and arm circumference , and POFS score in the two groups were observed .
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方法十二指肠球部溃疡并幽门梗阻用TTS气囊扩张,Hp感染用尿素酶、组织学和血抗体测定,根除Hp用14C尿素呼气试验。
Methods Twenty-one patients underwent through-the-scope balloon dilation for pyloric stenosis , and H.pylori infection was determined using the rapid urease test , histology and serology .
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综合碱性中和法和缓冲法的优点,优化了云母钛珠光颜料的制备工艺,并分别以尿素和氢氧化钠作为pH值稳定剂进行实验。
Combined the advantages of basic neutralizing method and buffer method , the preparation technology of titanium-mica pearlescent pigments was improved , and the experiments were carried out using ( NH_2 ) _2CO and NaOH as neutralization matter .