| 查看: 397 | 回复: 1 | |||
| 本帖产生 1 个 翻译EPI ，点击这里进行查看 | |||
shuoli金虫 (小有名气)
命名分辨
|
[求助]
求助翻译
|
||
|
Sodium hydroxide was dissolved in an appropriate amount of distilled water. This solution was heated in a water bath at 80–90◦C; agar agar was then slowly added to the hot alkali solution with stirring till a brown transparent viscous solution was obtained. This solution on cooling in ice gave a gel. The quantities of the three components, namely water–NaOH–agar agar, were varied to get different types of gels. Results are plotted on the triangular phase diagram. For the required GEBC a gel with the following composition was prepared: in 6 g of water 1 g of NaOH was dissolved with stirring. This solution was heated in a water bath at a temperature of about 80–90◦C; to this hot solution, 3 g of agar agar powder was slowly added while stirring the mixture homogeneously. The heating and stirring were continued till a translucent brown viscous solution was obtained, which on cooling in ice gave a hard solid gel which could be cut into pieces. To acrylonitrile (10 mmol), in the alcohol (20 ml) taken in excess, 10% NaOH-GEBC pieces (0.1 g) were added. The reaction mixture was stirred at the required temperature. For 1aand 1bthe reactions were moni-tored over GC by drawing samples from the reaction and analyzing them. In case of other alcohols, however, the reaction took at least 3 h. The solution was then filtered, the GEBC was washed with the alcohol used and the filtrate was analyzed by G.C. In the case of benzyl alcohol, the alcohol and acrylonitrile were taken in 1:1 mole ratio in 2-methylpropan-2-ol as solvent (5 ml) and the reaction was carried out at 50◦C. The identity of known cyanoethylated products of methanol, ethanol, cellosolve, and benzyl alcohol was established by their b.p.s and FT-IR spectra. The identity of unreported cyanoethylated products of 1-propanol and 2-methylpropan-1-ol was established with the help of 1H NMR spectra. |
回复此楼» 猜你喜欢
三无产品还有机会吗
已经有4人回复
-
投稿返修后收到这样的回复，还有希望吗
已经有7人回复
-
压汞仪和BET测气凝胶孔隙率
已经有4人回复
-
博士申请都是内定的吗？
已经有14人回复
-
谈谈两天一夜的“延安行”
已经有13人回复
-
氨基封端PDMS和HDI反应快速固化
已经有11人回复
-
之前让一硕士生水了7个发明专利，现在这7个获批发明专利的维护费可从哪儿支出哈？
已经有11人回复
-
论文投稿求助
已经有4人回复
-
Applied Surface Science 这个期刊。有哪位虫友投过的能把word模板发给我参考一下嘛
已经有3人回复
-
投稿精细化工
已经有6人回复
板凳匪徒
至尊木虫 (职业作家)
江北篮球学院MVP
- 翻译EPI: 63
- 应助: 31 (小学生)
- 金币: 11572.8
- 散金: 770
- 红花: 84
- 帖子: 3524
- 在线: 935.9小时
- 虫号: 1035135
- 注册: 2010-06-03
- 性别: GG
- 专业: 有机分子功能材料化学
【答案】应助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ ...
爱与雨下: 金币+2 2013-05-28 21:53:22
shuoli: 金币+50, 翻译EPI+1, ★★★很有帮助 2013-05-28 22:25:05
爱与雨下: 金币+2 2013-05-28 21:53:22
shuoli: 金币+50, 翻译EPI+1, ★★★很有帮助 2013-05-28 22:25:05
|
用适量的蒸馏水溶解氢氧化钠。将上述溶液置于80-90℃水浴中加热；然后将琼脂慢慢添加到热碱溶液中并搅拌直到变为棕色透明粘稠溶液。该溶液在冰中冷却后得到凝胶。这三个成分（即水、氢氧化钠、琼脂）的数量不同导致所得凝胶的类型不同。结果绘制在三角相图中。 所需的凝胶包埋碱催化剂凝胶由以下成分制备: 1g氢氧化钠在6g水中搅拌溶解。将该溶液置于80-90℃水浴中加热；将3g琼脂粉缓慢加入到该热溶液中，搅拌直到混合均匀。溶液持续加热并搅拌直到变为半透明的棕色粘稠溶液，在冰中冷却后得到可切成片的硬固体凝胶。 丙烯腈(10mmol)加入到过量的乙醇(20ml)中,再加入10%的NaOH-凝胶包埋碱催化剂片(0.1g)。反应物在所需温度下搅拌。1a和1b反应利用气相层析来检测，从反应中取样并分析它们。然而，对于其他醇类，反应至少要进行3h。溶液过滤，用乙醇洗涤凝胶包埋碱催化剂并用气相层析分析了滤液。 苯甲醇、乙醇和丙烯腈按照摩尔比1:1分别置于溶剂2-甲基丙烷-2-醇(5ml)中在50℃下进行反应。 已知标识的甲醇,乙醇,甲基纤维素和苄醇的氰乙基化产品通过其叔丁基二苯基硅烷基和傅里叶变换红外光谱加以证明。未知标识的2-甲基丙烷-1-醇和1-丙醇的氰乙基化产品通过核磁氢谱的辅助加以证明。 |
2楼2013-05-28 20:04:59