In the liver, ammonia is converted to urea through the urea cycle.
在肝脏，氨通过尿素循环转换成尿素。
This is an X-linked deficiency of one of the enzymes in the urea cycle.
这是一个X染色体缺陷导致的尿素循环酶缺乏症之一。
Arginase catalyzes the conversion of arginine to ornithine and urea, completing the last step in the urea cycle.
精氨酸酶催化精氨酸转化成鸟氨酸和尿素，且是尿素循环的最后一步。
Elevation NH3 occurs as the toxic metabolite inhibits the carbomyl phosphate synthase I, preventing the incorporation of NH3 into the urea cycle.
增多的氨作为毒性代谢物抑制了氨甲酰磷酸合成酶，并阻止氨进入尿素循环。
Introduce the main technical features and process flow of heat-cycle urea process. Also put forward some Suggestions for the expansion of heat-cycle urea plant.
该文介绍了热循环尿素工艺的主要技术特点及工艺流程，并就该工艺的特点对水溶液全循环法尿素生产装置的增产节能改造提出了参考意见。
Introduce the main technical features and process flow of heat-cycle urea process. Also put forward some Suggestions for the expansion of heat-cycle urea plant.
该文介绍了热循环尿素工艺的主要技术特点及工艺流程，并就该工艺的特点对水溶液全循环法尿素生产装置的增产节能改造提出了参考意见。
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