查询词典 free radical

Objective To investigate the therapeutic effects of SOD as a free radical scavenger on experimental acute pancreatitis.

目的 探讨超氧化物歧化酶(superoxide dismutase， SOD)对急性胰腺炎的作用机制及治疗效应。

The effect of some oxygen free radical scavengers, Superoxide Dismutase and Sodium Selenate, on Ouabain induced toxicity of isolated heart were studied by the Langendorff apparatus.

用Langendorff离体心脏灌流制备，研究氧自由基清除剂：超氧化物歧化酶和亚硒酸钠对哇巴因所致心脏毒性的影响。

The results show that the semilethal temperature decreased.The activity of SOD、POX and the content of Vc increased,leading to increasing of the ability of the membrane protective of scavenging free radical.

结果表明，低温半致死温度降低的同时，SOD、POX活性增强，Vc含量增加，使膜保护系统清除自由基的能力加强，O。

During these years (1997-2000) in the research area of annonaceous acetogenins 5 natural products and a number of chiral-pure analogs of annonaceous acetogenins have been synthesized using sugars as the starting materials. Their high activity and selectivity against cell line of colon tumor and a relationship between activity and configuration have been found too. In the respect of inhibitor of sialidase two new methodologies for the synthesis of chiral-pure 3-deoxy-ulosonic acid using hetero-Diels-Alder reaction or asymmetric propargylation as the key reaction were developed. On the topic of anti-leukemia marine natural product clavulactone a synthetic method based on the free radical cyclization and starting from sugar has been developed. In other title of PKC inhibited agent sphingosine a new synthetic route with SN2' as the key reaction has also been disclosed.

项目期间（1997-2000）在番荔枝内酯方面从糖出发合成了五个天然产物和一批手性纯的类似物，它们对肠癌细胞有很高的活性和选择性，并与构型有关；在唾液酸酶抑制剂方面发展了二类全新手性纯高碳糖的合成方法－杂原子D－A反应或丙炔基不对称加成为关键的反应；抗白血病海洋天然产物群柱虫内酯方面研究了由糖出发和自由基环化反应的合成方法；对PKC 起抑制作用的鞘氨醇方面也开创了新的合成途径－由糖出发并以SN2'反应为关键反应。

Poly (N-isopropylacrylamide) macromonomer with a styrol end group was prepared by free radical polymerization of NIPAAm.

用链转移自由基聚合和端基置换反应，合成了聚N-异丙基丙烯酰胺热敏性大分子单体。

This research suggests that free radical may increase in pneumonia and diarrhea that wastes the sulfhydryl substances.

提示腹泻和肺炎时自由基产生可能增加，从而消耗了巯基物质。

Prevent premature ageing caused by overexposure to the sun with this daily SPF30+ face lotion. Encapsulated sunscreen helps protect sunscreen-sensitive while natural antioxidant green tea extract helps protect the skin against free-radical damage.

Kosmea保湿防晒乳液SPF 30+防止过度的日晒对皮肤造成的过早老化，密封的防晒剂有助于保护敏感的天然抗氧化剂，而绿茶提取物可保护皮肤免于自由基的伤害。

For one, superoxide is only one of several free radical species in the body.

其一，超氧化物只是人体中众多自由基中的一种。

And meanwhile, capacity of scavenging OH and O2(superscript -)free radical in vitro was investigated.

同时还研究了体外条件下对OH和O2自由基的清除效果。

Milk Thistle has protective effect on cell membranes due to its strong antioxidant and free radical scavenging action.

牛奶蓟有防护作用在细胞膜由于它强的抗氧化和自由基换气行动。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。