They then calculated the eutrophication potential of each food group and compared these farm-to-table nitrogen footprints to carbon footprints, using data from a well-known 2008 study Environ. Sci.
然后，他们计算了每组食品的潜在富营养化状态，用2008年一项著名研究的数据，对这些食物从农场到餐桌的氮足迹与碳足迹加以比较(环境。科学。技术。，2008,42,3508)。
Cytosine organic compound of the pyrimidine family often called a base consisting of a single ring containing both nitrogen and carbon atoms and an amino group.
胞嘧啶：嘧啶族的有机化合物。常被称为基，包含一个单环，内有氮原子和碳原子，还有氨群。
Guanine: organic compound of the purine family often called a base consisting of two rings each containing both nitrogen and carbon atoms and an amino group.
鸟嘌呤：嘌呤类的有机化合物，常称为碱基，包含二个环，各含氮原子和碳原子，还有一个氨群。
There was no obvious changes of urea nitrogen content in each group (P > 0.05).
各实验组小鼠的尿素氮含量未见明显变化（P>0.05）。
Introducing into air drilling, nitrogen drilling and air percussion drilling were applied in Puguang upper continental facies stratum; moreover, drilled successfully into Xujiahe group stratum.
引进空气钻井、氮气钻井、空气锤冲击钻井在普光气田上部陆相地层试验和应用，并成功拓展到须家河组地层。
Nitramines are substances which contain a nitro group bonded to nitrogen.
含有与氮原子相连的硝基的物质称为硝胺。
Nitramines are substances which contain a nitro group bonded to nitrogen .
含有与氮原子相连的硝基的物质称为硝胺。
The recovery of body weight, level of plasma albumen and nitrogen balance in NS group was faster than that of NT group.
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。
All of these from the group one and two through the group five and six elements, but what about elements, what about molecules like hydrogen, or nitrogen, or maybe oxygen?
所有的这些都是来自于第一主族和第二组主族，到第五主族和第六组主族的悬殊，那么元素呢，比如氢气，氮气或氧气那样的分子呢？
In this paper, the genesis, distribution, group composition, shortcomings of nitrogen compounds in the crude oil and the products were discussed.
介绍了石油及产品中氮化合物的起源、分布、分类、危害及各类氮化物的浓缩、分离、鉴定的各种方法。
The meso carbon atom of the methine linkage of the dye is attached to the nitrogen atom of an amino group.
该染料的甲川链上的中位碳原子与氨基的氮原子相连。
The change of ammonia nitrogen concn . in the waterbody had no significant difference from that of the control group.
对于水体中氨氮的浓度，罗非鱼的影响则不明显。
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：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（P <0 .0 5 ）。
Results:Renal function improved in the two groups after treatment, Creatinine and blood urea nitrogen in combination group after treatment were all significantly lower than PD group(all P<0.05).
结果：两组治疗后肾功能均得到改善，联合组肌酐、尿素氮均低于腹透组，差异均有统计学意义（均P<0.05）；
In the two sides of nitrogen bridge, the degree of conjugation of one double bond with one formyl polyenic group is about equal to two aromatic cycles.
在氮桥的二边，一个双键及一个烯醛基共轭程度大致与二个芳稠环相当。
The meso carbon atom of the methine linkage of the dye is attached to the nitrogen atom of a group which forms an enamine with the methine linkage of the dye .
该染料甲川链上的碳原子与氨基的氮原子相连，而该氮原子又与染料的甲川链形成烯胺。
The time of swimming was significantly longer but levels of serum urea nitrogen and blood lactic acid markedly lower in beer-administered group than in the control ( P <0.05).
保健啤酒组小鼠游泳时间明显长于对照组，血清尿素氮、血乳酸明显低于对照组。
Four concentrate were supplemented with soybean and different proportional urea respectively to attain the same nitrogen level, control group with the basal diet.
所饲喂的四种日粮均由混合精料和粗料两部分组成，四种精料分别加入豆粕和不同比例的尿素达到等能等氮水平。
The experimental result also shows that the nitrogen element on the surface of contact black surface may be mainly in forms of amino group and nitro group.
此外，实验分析了接触法炭黑表面氮元素的组成，结果表明主要是以氨基和硝基的形式存在。
Rats in the PVL model group were subjected to the ligation of right carotid artery, and then they were kept in a box with 6% oxygen and 94% nitrogen for 4 hours to establish the PVL animal model.
假手术组仅进行右侧颈总动脉分离术而不作结扎及缺氧处理。PVL模型组大鼠行右侧颈总动脉结扎后吸入含6％氧气和94％氮气的氧氮混合气体，处理4小时，建立新生大鼠PVL模型。
A chemical group comprising nitrogen bound to two hydrogen atoms.
由氮原子与两个氢原子结合形成的化学基团。
The two genotypes winter wheat group water use efficiency increased under nitrogen treatment, and Xiaoyan 22 are higher than Xiaoyan6.4.
就两个基因型品种而言，小偃22的水氮利用效率显著高于小偃6号。
The elements of group V A include three nonmetals — nitrogen, phosphorus, and arsenic—and two metals — antimony and bismuth.
集团外语由一个非金属、碳、两个非金属等、硅和锗，和两个金属、锡、铅。
Nitrogen intake in HM group was the highest, and extremely significantly higher than that in other groups (P<0.01);
水貂食入氮以HM组最高，极显著高于其他各组（P<0.01）；
Water injection is always difficult in low permeability reservoirs, to improve the working degree of this reservoir, Wei42 14 well group was selected to conduct the nitrogen gas flooding pilot test.
低渗透油藏的注水往往存在很大困难，为提高此类油藏的动用程度，选择卫4 2 14井组实施了氮气驱先导试验。
Liquid nitrogen was spurted until freeze-thaw status in group A, and the ramnant skin lesion needed for other treatments, but no more than 3 times.
A组用液氮点喷的方法，以冻融为度，未完全消除者可重复治疗，直至全部脱落，经过3次治疗未能完全消除者停止治疗。
The nitrogen monoxidum enzyme activity of cyprinoid cerebellum was significantly different between anesthesia group and the non-narcotic group.
对鱼深麻后小脑一氧化氮酶活性麻醉组与非麻醉组之间差异显著。
Thymine: Organic compound of the pyrimidine family, often called a Base, consisting of a ring containing Both nitrogen and carbon atoms, and a methyl group.
胸腺嘧啶：一种嘧啶类有机化合物，通常叫做基底，由含有氮和碳原子以及甲基的环形物组成。
Thymine: Organic compound of the pyrimidine family, often called a Base, consisting of a ring containing Both nitrogen and carbon atoms, and a methyl group.
胸腺嘧啶：一种嘧啶类有机化合物，通常叫做基底，由含有氮和碳原子以及甲基的环形物组成。
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