卤原子作为保护基，代替末端炔发生碳-氢官能团化反应。
Halogen atom could activate the triple bond and as the directing group, the triple bond occurs the electrophilic addition reaction.
分析了不同的离去基团和不同的保护基策略对糖肽合成的影响。
The factors which affect the results of glycopeptide synthesis were analyzed.
在寡糖和复合糖的合成中作为糖的端位保护基也有过成功的应用。
It has been successfully used for protection of the anomeric centre against standard reaction conditions in the synthesis of oligosaccharides and glycoconjugates.
最常用的羟基保护基可归纳为三类：酯类、醚类和缩醛或缩酮类。
The hydroxyl groups can be changed into esters, ethers, acetals and ketals, etc.
综述了常用的氨基保护方法和保护基，并列举了大量实例说明其在有机合成中的应用。
In this paper, we show some general methods of amino protection and some protective groups, and also give a few examples to indicate their applications in organic synthesis.
本文介绍了用聚酰胺薄层层析的方法，分离和检定带保护基的核苷、核苷酸和低聚核苷酸。
A method of polyamide thin layer chromatography applicable to the separation and identification of blocked nucleosides, nucleotides and oligonucleotides is herewith described.
方法采用对硝基苯胺为原料，经还原、加保护基、甲酰化、氯化、环合、脱保护基六步反应法可进行化学合成。
Methods Apraclonidine was synthesized from P-Nitraniline by reaction with reduction, adding protection group, formylation, chlorination, cyclization, off-protecting group.
在最后一步脱保护基的研究中，我们分别采用了锌粉还原和钯碳氢化两种方法得到最终产品，并对其后处理的方法进行了改进。
In the last step, we developed two methods of deprotection employing zinc dust and catalytic hydrogenolysis respectively to give the final product, and improved the work-up as well.
对甲苯磺酰基酰胺和2-苯基-N，N'-二甲基苯并咪唑啉（PDMBI）之间的光诱导电子转移反应，为酰胺的保护基——对甲苯磺酰基的脱除反应，提供了一条有效途径。
The photoinduced electron transfer reaction between N-tosyl amides and 2-phenyl-N, N'-dimethyl benzimidazoline (PDMBI) provides an efficient approach for the deprotection of N-tosyl amides.
CCAMLR 的科学经理基思·里德表示，该组织寻求“在南大洋捕鱼的保护、保存和可持续性之间取得平衡”。
Keith Reid, a science manager at CCAMLR, said that the organization sought "a balance between protection, conservation and sustainable fishing in the Southern Ocean.
这个难题是：如何找到有利可图的利基市场并加以保护。
The difficult question is how to find that profitable niche and protect it.
击中奥克弗诺基国家野生动物保护区深处的蜜糖大草原的闪电，可能只会撂倒两三棵树而已。
The bolt that struck Honey Prairie, deep inside the Okefenokee National Wildlife Refuge, might have just knocked down a tree or two.
基恩清楚地知道，CNSC的工作不只是帮助解决问题，而要保护加拿大国民的安全。
Keen is clear that the job of the CNSC is not to help out but to protect Canadian citizens.
“不管是故意的还是无意的，排斥山达基的人，也排斥山达基的保护和利益，排斥山达基人的友谊，”哈伯德写道。
“Anyone who rejects Scientology also rejects, knowingly or unknowingly, the protection and benefits of Scientology and the companionship of Scientologists,” Hubbard writes.
基卡伦(Kilcullen)赞成英国指挥官推崇的做法，即保护有人居住的地方，而不是试图保障所有领土的安全。
Kilcullen supports the idea, pushed by British commanders, of protecting places where the population live rather than attempting to secure all territory.
以缅因州的一场绿色对绿色的纠纷为例，那里的环境保护论者就计划在基比山的荒地上扩建一座风力农场争论不休。
As an example of a green-on-green row, take one in Maine, where environmentalists squabble over plans to expand a wind farm on the wilderness of Kibby Mountain.
基思向他父亲道歉，因为他现在知道了帕默所做的一切只是为了保护他，使他避免背上谋杀乔治。菲拉格慕的罪名。
Keith apologizes to his father because he now knows that Palmer was only protecting him from being accused of George Ferragamo's murder.
莓类水果里含有的抗氧化剂，可以保护人体远离能破坏人体活细胞的自由基的伤害。
The antioxidants, found in berries help protect the body against free radicals that can cause damage to living cells.
格奥尔基·蒂姆科咒骂着，他想保护如此忠诚的手下，不过恐怕他们都得死在这里了，现在只有运气或守护天使能够拯救他们。
He wanted to protect such loyal men, but feared he'd already cost them their lives. Only luck or a guardian angel could save them all now.
大雪纷飞，夹杂着冻雨，连克罗诺茨基自然保护区的工作人员晚上休息时都要在火炉旁把身子烤的暖和一点。
It still often snows and rains, and the workers of the Kronotsky Nature Reserve have to use stoves to warm themselves at night.
作为抗氧化剂，番茄红素可以保护细胞结构和DNA远离自由基的影响——自由基是一种会破坏健康细胞、使癌细胞扩散的微粒。
As an antioxidant, lycopene protects cell structures and DNA against the nefarious effects of free radicals-small particles that damage healthy cells and allow tumor cells to develop.
远足的驴友可以沿着马拉自然保护区的铁路线一路走到喀呐约基瀑布。
Hikers can get to Kitsiputous Falls by following the trail that leads through the Malla Strict Nature Reserve.
他为基斯的右手缠上绷带加以保护，等到医生去处理。
He bandaged Keith's right hand to protect it until the doctors could set it.
如果仅是闪电而没有干旱，击中甜蜜大草原(位于奥克弗诺基国家动物保护区腹地)的闪电不过可能会撂倒两三棵树而已。
And had there been lightning and no drought, the bolt that struck Honey Prairie, deep inside the Okefenokee National Wildlife Refuge, might have just knocked down a tree or two.
重要提示：为了避免在网站启动期间对维基的故意破坏，我们保护用户编辑章节的各页面。
Important Note: To avoid wiki vandalism during the site launch, we're protecting the chapter pages from user edits.
不像美国，作为落基山脉的一小部分被保护在自然公园里，而坐落在加拿大部分的落基山脉本身就是公园。
Unlike here in the States, where only small fragments of the Rockies are protected in national parks, a large portion of the Canadian Rockies is held in reserve as parks.
想象下，几十个三明治塑料袋子贴着各种以城市命名的标签，拉斯维加斯、芝加哥、密尔沃基之类，里面装着泰勒为了保护搏击俱乐部各地分部而收集回来的蛋蛋。
Picture dozens of little plastic sandwich bags labeled with cities like Las Vegas and Chicago and Milwaukee where Tyler had to make good his threats to protect chapters of fight club.
这就是健康组织坚持建议人们多吃新鲜果蔬的原因：新鲜果蔬能够给你提供不间断的保护，来对抗自由基给你的动脉血管带来的损害。
This is the reason the health establishment is so insistent on people eating more fresh produce: It provides around-the-clock defenses against free-radical damage to your arteries.
基因变异的虫子向我们演示，自由基可以帮助触发身体的保护和修复机制。
The genetically modified worms demonstrated that the production of free radicals can help to trigger the body’s general protective and repair mechanisms.
基因变异的虫子向我们演示，自由基可以帮助触发身体的保护和修复机制。
The genetically modified worms demonstrated that the production of free radicals can help to trigger the body’s general protective and repair mechanisms.
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