吡啶

The dosages of additives were determined as 5 mg/L K4Fe6, 5 mg/L2, 2'-dipyridyl, 10 mg/L L-arginine, and 5 mg/L 2,2'-dipyridyl +10 mg/L L-arginine.

添加剂最佳使用量分别为：5 mg/L亚铁氰化钾；5 mg/L2，2'-联吡啶；10 mg/L L-精氨酸以及二元复合添加剂5 mg/L2， 2'-联吡啶＋10 mg/LL-精氨酸。

In this paper, the host-guest relationship between a general cucurbit [n=7] uril (Q[7]) or a new ellipsoid-host-symmetric tetramethyl-cucurbituril (TMeQ[6]) with hydrochloride salts of 4,4'-dipyridyl (44) or N,N'-dimethyl-4,4'-dipyridyl(dm44) was examined for confirming the interaction between cucurbituril (Q[6]) and these guests.

以七元瓜环(Q[7])和新型椭圆型改性瓜环―对称四甲基取代六元瓜环(TMeQ[6])为主体，4，4'-联吡啶的盐酸盐(44)以及N，N'-二甲基4，4'-联吡啶的盐酸盐(dm44)为客体的主客体相互作用进行了考察。

Two novel A-it-A' type benzothiazole-based derivatives with benzothiazolyl, phenyl-acetyl or pyridine cation groups as π electron acceptor, diethenylphenyl as π conjugated bridge: 4-(2-benzothiazolyl) ethenylchalcone (1) and 4-{4-[2-(benzothiazole-2-yl) ethenyl] styryl}-N-methylpyridinium iodide (2) were synthesized.

以苯并噻唑、苯乙酰基和吡啶阳离子为电子受体，二乙烯基苯为共扼桥，合成了两个新的A-π-A'型苯并噻唑衍生物：4-（2-苯并噻唑）－乙烯基查尔酮(1)和4-｛4-［2-乙烯基］苯乙烯基｝－N-甲基吡啶碘盐(2)。

Two novel A-π-A′ type benzothiazole-based derivatives with benzothiazolyl,phenyl-acetyl or pyridine cation groups as π electron acceptor,diethenylphenyl as π conjugated bridge: 4-(2-benzothiazolyl)ethenylchalcone(1) and 4-{4-[2-(benzothiazole-2-yl)ethenyl]styryl}-N-methylpyridinium iodide(2) were synthesized.

以苯并噻唑、苯乙酰基和吡啶阳离子为电子受体，二乙烯基苯为共轭桥，合成了两个新的A-π-A′型苯并噻唑衍生物：4-(2-苯并噻唑)-乙烯基查尔酮(1)和4-{4-[2-乙烯基]苯乙烯基}-N-甲基吡啶碘盐(2)。

In this work , 1,8-octodiol, the starting material, reacted with 40% hydrobromic acid to produce 8-bromooctan-1-ol, with the catalytic action of PPTs, its hydroxyl group was protected by 2,3-dihydropyran. Then it coupled with 1-heptaalkyne, by means of P-2 nickel as catalyst, stereoselectivity catalysis hydrogenated, with the catalytic action of acid to take off extremital 2, 3-dihydropyran which protected hydroxy group, then used PCC to oxidize alcohol into corresponding aldehyde.

以1，8-辛二醇为原料，与40%氢溴酸进行单溴代反应，得到8-溴-1-辛醇，在对甲苯磺酸吡啶盐的催化下与2，3-二氢吡喃反应，保护分子中的羟基，再与1-庚炔进行偶联，以P-2镍为催化剂立体选择性催化加氢，酸性条件下脱末端的2，3-二氢吡喃对羟基的保护，使用氯铬酸吡啶盐将醇氧化成醛。

The key intermediate 3-methylaminopiperidine was synthesized from 3-methylaminopyridine by two methods,formylation and lithium aluminium hydride reduction or condensation with triethyl orthoformate and sodium borohydride reduction,and then hydr...

以3-氨基吡啶为原料，分别通过甲酰化反应、氢化铝锂还原和原甲酸三乙酯缩合、硼氢化钠还原两种方法得到3-甲胺基吡啶，最后经催化氢化得到中间体3-甲胺基哌啶。

The key intermediate 3- methylaminopiperidine was synthesized from 3-methylaminopyridine by two methods, formylation and lithium aluminium hydride reduction or condensation with triethyl orthoformate and sodium borohydride reduction, and then hydrolysis.

以3-氨基吡啶为原料，分别通过甲酰化反应、氢化铝锂还原和原甲酸三乙酯缩合、硼氢化钠还原两种方法得到3-甲胺基吡啶，最后经催化氢化得到中间体3-甲胺基哌啶。

OBJECTIVE:To study the effects of nifedipine and the interaction of nifedipine and glibenclamide on the plasma glucose levels in the fasted and adrenaline hydrochloride-induced hyperglycemic rat.

目的：研究硝苯吡啶以及硝苯吡啶与格列本脲合用对空腹大鼠和肾上腺素诱发高血糖大鼠血糖水平的影响。

In contrast to S- and O-heterocyclic compounds, increasing ionic strength reduced the sorption of ionizable N-heterocyclic compounds (pyridine, 2-methylpyridine, quinoline, 2-methylquinoline, and isoquinoline), due to increased electrostatic competition by cations.

对比硫和氧类杂环物质，提高离子强度会减少杂环化合物的吸收（吡啶、2甲基吡啶、喹啉、2甲基喹啉和异喹啉）这主要是由于阳离子的静电竞争。

Using copper sulfate as catalyst, pyridine-3, 4-dicarboxylic acid was synthesized by oxidizing isoquinoline with concentrated nitric acid at high temperature, and the yield was 71.4%.

在钼酸铵存在下，采用固相烘焙法，2，3-吡啶二甲酸和3，4-吡啶二甲酸分别与尿素和氯化亚铜作用得到了氮杂铜酞菁。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了