查询词典 N

Trifluoromethyl-3-heptadfluoroisopropyl-2-perfluoropentene-4-(N',N'-dimethylamino propyl) imino was prepared by the reaction of hexafluoropropene timer with N,N-dimethyl propanediamine in the molar ratio 1:1.0 at room temperature for 8h, and the structures of VIII were identified by IR and NMR spectra.

以六氟丙烯三聚体与N，N-二甲基丙二胺为原料合成叔胺2-三氟甲基-3-七氟异丙基-2-全氟戊烯-4-(N'，N'-二甲胺丙基)亚胺，利用红外光谱和核磁共振确定其结构，并通过对合成条件的考察得其最佳合成条件：乙醚为溶剂，碳酸钠为缚酸剂，摩尔投料比为1：1.0，在室温下反应8小时。

The sludge settling characteristic is satisfying with SV varying from 22 to 30 and SVI varying from 58 to 80ml/g.The sludge bulking problem has been avoided successfully. The excess sludge can be thickened to 3%-4 %. The alkalinity remains equilibrious between the nitrification and denitrification in SBR-BAF system. The COD and TP loading of SBR are 2.08kgCOD/kgMLSS·d and 41.68gTP/kgMLSS·d, respectively. The NH4+-N loading of BAF is 1.16kgNH_4~+-N/m~3.d. The total HRT is about 10 hours which is only about half of suspended growth process for simultaneous phosphorous and nitrogen removal. Under the above mentioned high loadings and short HRT, the mean removal efficiency of COD, TP, NH4+-N, TN is 96%, 98%, 93%, and 84%, respectively. The mean effluent concentration of COD, TP, NH4+-N, TN, SS is 20mg/L, 0.23 mg/L, 3.24 mg/L, 7.68 mg/L, 5 mg/L respectively, which means every index can meet the first class of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant.

最后，以上述最佳运行参数控制SBR-BAF系统运行，长期运行结果表明：系统中悬浮污泥的絮凝、沉降性能良好，SV值为22~30，SVI值为58~80，不再有污泥膨胀之虞，而且可以对剩余污泥进行重力浓缩，浓缩后污泥浓度可以达到3~4%；短程硝化和反硝化使得系统可以维持碱度平衡，无需额外补充碱度；系统在高负荷(SBR反应器COD负荷为2.08kgCOD/kgMLSS.d，TP负荷为41.68gTP/kgMLSS.d，BAF反应器NH4+-N负荷为1.16kgNH_4~+-N/m~3.d)、低水力停留时间(SBR反应器9h，BAF反应器1h，总计10h，约为同步脱氮除磷悬浮污泥工艺的一半)下稳定高效运行，对COD(不计BAF加入的外碳源)、TP、NH_4~+-N、TN的平均去除率为96%、98%、93%、84%，出水COD、TP、NH4+-N、TN、SS的平均浓度为20mg/L、0.23 mg/L、3.24 mg/L、7.68 mg/L、5 mg/L，各项水质指标均达到《城镇污水处理厂污染物排放标准》(GB 18918-2002 )一级标准的A标准的要求。

The effect of different factors was investigated and the main process conditions were obtained: addition temperature120~140℃,esterify temperature:160~175℃,n:n=3~4:1mol:mol）,n(DCPD:n =0.6~0.8:1mol:mol）,the amount of catalyst is

双环戊二烯的含量低于80%，研究了各种影响因素，得出主要工艺条件：加成温度为120~140℃，酯化温度为160~175℃，n：n=3~4：1，n：n=0.6~0.8：1，催化剂用量为0.1~0.2%，树脂收率达

Reticulatum has higher ability to remove N and P in eutropic water bodies and treated sewage waste water; and the highest removal rates are 67.3% and 91% respectively during 6 days treatment.The removal amount of N or P per wet weight increases with increased N or P concentration under N and P contents between 4.2-50.4 mg/L and 0.186-2.232 mg/L. In op...

在含4.2－50.4mg／LN、0.18oh2.232mg／LP条件下，单位湿重的水网藻对N、P的去除能力随N、P浓度的增加而增加温度对水网藻N、P去除能力的影响与生长一致，生长越旺盛，去除能力越强水网藻对门扶乏的自然水体中的N、P去除能力也较强，去除率分别为70％和50％以上；而添加P，对TN、TP的去除率也增加因此，使用水网藻作为富营养化治理植物具有一定的可行性

The precipitation only has faintish negative correlations with N concentrations （p〉 0.05）, but the NH^＋ 4-N has significant positive correlations with NO^- 3-N and TON （p〈 0.05）, and they might have homologue.

结果表明，各形态氮月均浓度之间差别较大，具有明显的季节性，原因主要与人类活动、降水强度及频次、风向、地理位置以及氮氧化物自然排放有关；湿沉降的TN组成以TIN为主（51.38％-98.96％），TIN又以NH^＋ 4-N和NO^- 3-N特别是NH^＋ 4-N为主，降水天气系统的路径在很大程度上影响着降水中各形态氮的组成；降水量与各形态氮浓度均呈较弱的负相关（P〉0.05），而NH^＋ 4-N与NO^- 3-N、TON均呈显著正相关（P〈0.05），它们可能具有同源性。

Most of fluorenyl cardo polyimides exhibited excellent solubility in common organic solvents such as m-cresol,chloroform(CHCl_3), tetrahydrofuran,N-methyl-2-pyrrolidinone,N,N-dimethylacetamideetc and intrinsic viscosity in N,N-dimethylacetamideranged from 0.31-1.00dL/g.

大部分芴基Cardo型聚酰亚胺可以溶解在间甲酚，氯仿(CHCl_3)，四氢呋喃，N—甲基吡咯烷酮，N，N—二甲基乙酰胺等有机溶剂内，在DMAc内的特性粘度范围为0.31～1.00dL/g。

Three series of donor-acceptorπ-conjugated molecules 1, 2, and 3 have been designed and synthesized with a N, N-dimethylamino, Julolidine group (2,3,6,7-tetrahydro-1H, 5H-pyrido[3, 2, 1-ij]quinolinyl), or N, N-diphenylamino group as the donor moiety, a phenylvinyl or thienylvinyl unit as the bridge, and a bromide or aldehyde group as the acceptor moiety.

本文设计并合成了1、2、3三个系列的D-π-A型化合物(Donor-Acceptorπ-conjugated compounds)，在化合物分子中引入久洛尼啶基团(2，3，6，7-tetrahydro-1H，5H-pyrido-[3，2，1-ij]quinolinyl)，N，N-二甲基氨基，或N，N-二苯基氨基为供电子基团，以苯乙烯基或噻吩乙烯基为桥链，以溴原子或醛基为吸电子基团。

Three single crystals of N-nitrobenzene, N-acyl dehydroabietic hydrazine 7c single water compounds, N, N-acyl dehydroabietic hydrazine 7l and 2,5 - dehydroabietic-1, 3,4 - oxadiazole 8g were obtained for the first time. X-ray diffraction analysis of these crystals showed dehydroabietic acid skeletons were contained in these crystal molecules.

首次得到N-去氢枞基，N-对硝基苯基双酰肼7c一水化合物、N，N-二去氢枞基双酰肼7l和2，5-二去氢枞基-1，3，4-噁二唑8g 3个单晶，并用X射线单晶衍射进行了解析，晶体中均含有去氢枞酸分子骨架。

Through condensing o-aminobenzoic acid, ethyl oxalyl chloride and ethylenediamine(or 1,2-propylenediamine), two new ligands N-benzoato-N′-(2- aminoethyl)oxamido(H3oxbe) and N-benzoato-N-(2-amino-2-methylethyl)oxamido(H3oxbt) have been synthesized. Their mononuclear complexes Na·1.5H2O and Na·1.5H2O have also been obtained.

2以邻氨基苯甲酸、草酸乙酯酰氯和乙二胺(或1，2-丙二胺)缩合制得了两种具有不对称草酰胺结构配体N-(2-苯甲酰基)-N&-(2-氨乙基)草酰胺(H3oxbe)和N-(2-苯甲酰基)-N&-(2-氨丙基)草酰胺(H3oxbt)，并得到了它们的单核配合物：Na·1.5H2O和Na·1.5H2O。

METHODS:(1)The bile-pancreatic ducts of rats were ligated,the catheters were inserted into right jugular vein and jejunum and the acute pancreatitis model was established.Forty pancreatitic rats were divided into four groups and were given simple parenteral nutrition(PN,n=10),early enteral nutrition(EEN,n=10), median enteral nutrition(MEN,n=10),and late enteral nutrition(LEN,n=10) respectively.

(1)结扎大鼠胆胰管，经右颈静脉及空肠插管建立大鼠急性胰腺炎营养支持模型。40只急性胰腺炎大鼠分别给予：单纯肠外营养(PN组，n=10)，早期肠内营养(EEN组，n=10)，中期肠内营养(MEN组，n=10)，晚期肠内营养(LEN组，n=10)。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。