氨的

But, this kind of condition would only occurred when a great deal of nitrobacteria are added into the water.

1去氨硝化菌能将鱼类所排放的氨转成毒性较小的亚硝酸盐，而去亚硝酸硝化菌则负责将亚硝酸盐再转成毒性更小的硝酸盐，硝酸盐必须由换水的方式移除，像硝化细菌这类的细菌再作用时需要消耗水中的氧气所以也称好氧菌。

Short chain fatty acid, propyl alcohol, methionine and dimethylamide are the possible precursors for spiramycin formation. Addition of 0.6% propyl alcohol into fermentation medium increases the spiramycin productivity by 24%, while addition of short chain fatty acids, methionine, or dimethylamide has a repression effect on spiramycin production.

合成螺旋霉素的前体物质可能有短链脂肪酸、丙醇、蛋氨酸和二甲胺等，在发酵培养基中加入0.6％的丙醇可以使螺旋霉素的发酵单位提高24％，而短链脂肪酸、蛋氨酸和二甲胺对菌体生长和螺旋霉素的生物合成有不同程度的抑制作用。

The effects of temperature on the mycelial growth of Rhizoctonia solani AG-l-IA and on its infection in maize were also studied.

本文从四个方面进行了研究：(1)研究了苯丙氨酸解氨酶生理病理变化及其与抗病性的关系；(2)在人工控温条件下，研究温度对玉米纹枯病菌菌丝生长、菌核萌发和侵染的影响；(3)建立人工病圃，系统监测玉米纹枯病的田间发生动态；(4)采用人工接种方法对一批玉米材料进行抗纹枯病的鉴定和评价，继续寻找新的抗源和抗性评价指标。

Serum level of TNF-α was measured by unsaturation assay; Serum level of IL-2、IL-6、 IL-10 were measured by radioimmunoassay.

采用非饱和法测定肿瘤坏死因子α的水平；采用放射免疫法测定白介素-2(IL-2)、白介素-6(IL-6)和白介素-10(IL-10)的水平；采用酶联免疫吸附法测定肌钙蛋白Ⅰ的水平；采用速率法测定丙氨酸转换酶的水平；采用肌氨酸氧化酶法测定肌酐的水平。

The copper atom is in a planar coordination site of [N_2O_2] and it devites from the mean plane by only 0.80 pm. Byπ-πstacking interactions, a alabastrine structure was obtained.(2)Schiff-base complex [Cu(H_2O)]·H_2O, where H3GS is the 3-carboxyl -salicylidene glycine, was synthesized and characterized by elemental analysis, IR spectra and single-crystal analysis. The crystal belongs to monoclinic system, space group P2(1)/c, a=848.46(3)pm, b=681.54(3)pm, c=1967.16(8)pm,β=95.8210(10)°, Z=4, R_1=0.0279, wR_2=0.0724. The copper atom is in a square-pyramidal field with the base

结果表明该晶系属单斜晶系，空间群P2(1)/c，晶胞参数：a=848.46(3)pm，b=681.54(3)pm，c=1967.16(8)pm，α=90°，β=95.8210(10)°，γ=90°，Z=4，R_1=0.0279，wR_2=0.0724，Cu原子位于轻微变形的四方锥场底心，底面被氮原子、酚氧原子、甘氨酸羧基的一个氧原子和一个水分子氧原子占据，而甘氨酸羧基的另一个氧原子占据相邻分子的锥顶，因而形成一维链状结构；合成了单核双聚配合物Na_2[Cu_2_2]·2H_2O ，铜三核配合物Cu_3_2·5H_2O和铜锌异三核配合物ZnCu_2_2·5H_2O，并用元素分析，IR光谱，电子光谱和磁化率测定对配合物的组

According to the results of quantum chemistry calculation and the present research status in the relationship between the structures and the functions of DT, the El 54 in DT catalyzing domain was mutated to aspartic acid and arginine in order to study the effects of the alteration on the biological activities.

在量子化学计算的基础上，结合目前关于白喉毒素结构与功能的研究状况，选择把白喉毒素催化区的第154位谷氨酸分别突变为天冬氨酸和精氨酸，研究此处电荷性质的改变对生物活性的影响。

It revealed high inhibition specificity toward serine proteinases (bovine trypsin, bovine chymotrypsin, and porcine trypsin). It did not exert any inhibitory activity toward cystein proteases and aspartyl proteinases.

丝氨酸蛋白酶抑制剂对丝氨酸蛋白酶家族中的牛胰凝乳蛋白酶、牛胰蛋白酶、猪胰蛋白酶三种蛋白酶的活性均有强烈的抑制作用；而对半胱氨酸蛋白酶家族中的木瓜蛋白酶及天冬氨酸蛋白酶家族中的牛胃蛋白酶几乎没有作用。

Experimental results showed that the relative average error of the proposed method, the hydrazine hydrate gravimetry and the ammonium chloroplatinate gravimetry is -0.14%~+0.13%,-0.21%~+0.21% and -0.13%~+0.14%, respectively, and the relative standard deviation of three methods is 0.05%~0.08%, 0.11%~0.14% and 0.08%~0.09%, respectively, for Pt content from 37% to 65%. Therefore, the accuracy and precision of the proposed method are almost the same with hydrazine hydrate gravimetry, and are a little better than ammonium chloroplatinate gravimetry. But it is rapid, economic, secure, easy to operate and environmental friendly.

结果表明：测定37%~65%的Pt含量，本法、氯铂酸氨重量法、水合肼还原重量法的相对平均误差分别为-0.14%~+0.13%、-0.21%~+0.21%、-0.13%~+0.14%，相对标准偏差分别为0.05%~0.08%、0.11%~0.14%、0.08%~0.09%，故本法的准确度和精密度与水合肼还原重量法的基本一致，较氯铂酸氨重量法的略好；但本法消解快速、节能、安全，操作简便，对环境污染程度小，适宜推广运用。

The baseline-sensitivity of Cladosporium fulvum to azoxystrobin was established,the present resistance situation of C.fulvum in different areas to Azoxystrobin was studied,and the resistant risk of C.fulvum to azoxystrobin was also assessed in laboratory.Resistance mechanism of C.fulvum to azoxystrobin was studied preliminarily.The results are shown as follows.

本试验建立了番茄叶霉病菌对嘧菌酯的敏感性基线：研究了目前不同地区的番茄叶霉病菌对嘧菌酯的抗药性现状；进行了番茄叶霉病菌对嘧菌酯的室内抗药性风险评估；对番茄叶霉病菌对嘧菌酯的抗性与苯丙氨酸解氨酶的活性进行了初步探讨，获得了如下研究结果： 1。

The paper studied the physiological characteristics of the leaves of Cotinus coggygria Royal Purple with different colors in autumn. Three kinds of leaf colors were selected to measure the contents of chlorophyll, anthocyanin, phenylalanin ammo-nialyase activity and the water content in the leaves. The results showed that the leaves exhibited red if it had lower chlorophyll content, higher activities of PAL and higher content of anthocyanin. The green leaves had higher chlorophyll content, lower activity of PAL, less content of anthocyanin.

本研究以美国红栌秋季叶片为试材，选取红色，中间色、绿色三种颜色的叶片，测定其叶绿素、花色素苷、苯丙氨酸解氨酶活性及叶片组织中的含水量，讨论其对美国红栌秋季叶片着色的影响，结果表明：美国红栌秋季叶片中，红色叶片叶绿素含量较低，PAL酶活性较高，花青素苷的含量较高，所以叶色呈现红色；绿色叶片中叶绿素含量较高，PAL酶活性较低，花青素苷的含量较少，所以呈现绿色。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。