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- The Boc protected phenylalanine (Boc-Phe-OH) reacted with phenylalanine amide to give the first dipeptide Boc-Phe-Phe-NH_2 in 86% yield. 以叔丁氧羰酰基(Boc)作为苯丙氨酸的氨基保护基，先制备苯丙氨酸酰胺三氟乙酸盐，再用叔丁氧羰酰基(Boc)保护的苯丙氨酸与其缩合得二肽片段Boc-Phe-Phe-NH_2，产率86%25。
- Synthesis technology of aspartame from L aspartic acid and L phenylalanine was studied in this paper.At first,each step of the synthesis was investigated separately. 探讨了以天冬氨酸和苯丙氨酸为原料制备甜味剂阿斯巴甜的合成工艺。
- In the enzyme L phenylalanine process,there are many impurity components in reaction liquid,such as mycelium and its fragment,enzymes,and bio macromolecule. 酶法生产L-苯丙氨酸的工艺中,反应液中含有大量的菌体及其碎片、酶和生物大分子等杂质。
- Four kinds of methods for preparation of L phenylalanine are reviewed.The new development of asymmetric synthesis of L phenylalanine is also introduced. 对目前国内外L苯丙氨酸制备方法的研究进展进行了综述,并介绍了L苯丙氨酸不对称合成的最新研究进展。
- Keywords L Phenylalanine;Immobilized cell;Rhodotorula glutinis; 苯丙氨酸;固定化细胞;粘红酵母;
- Keywords L aspartyl L phenylalanine methyl ester;synthesis;advance; 天门冬氨酰-L-苯丙氨酸甲酯;合成;进展;
- He drank off the flagon of wine amid their cheers. 在他们的喝彩声中他喝了一大瓶酒。
- He sat down amid deafening applause. 他在震耳欲聋的掌声中就坐。
- Keywords Rhodotorula giutinis;L phenylalanine;L phenylalanine ammonia lyase; 粘红酵母;L-苯丙氨酸;苯丙氨酸解氨酶;
- He kept calm amid all these excitements. 他在这些使人激动的事件中保持镇静。
- She left amid a swarm of photographers. 她离开时一群摄影记者围着她。
- He drank off the wine amid the cheers. 他在一片喝采声中把酒一饮而尽。
- He drank off a glass of beer amid their cheers. 在他们的欢呼声中，他把杯子里的啤酒一饮而尽。
- He felt strange amid so many people. 和这么多人在一起，他感到不自在。
- Keywords Rhodotorula glutinis;L phenylalanine;ammonia lyase（PAL）;L phenylalanine medium optimization.; 粘红酵母;L-苯丙氨酸解氨酶（PAL）;L-苯丙氨酸;培养基优化;
- He drank up the wine amid the cheers. 他在一片喝采声中把酒一饮而尽。
- London is spelt with a capital L'. London一字中L是大写的。
- Amid all the fumes and hurtling missiles we kept our heads. 虽在烟雾弥漫，弹片横飞之中，而我们还是镇定不乱。
- A church stands amid skyscrapers. 摩天大楼之间耸立著一座教堂。
- We lost our companions amid the storm and the darkness. 在暴风雨和黑暗中,我们失去了伙伴。
