类似物

Compared with the unsubstituted zinc phthalocyanine, these di-a-substituted analogues have a red-shifted Q band (at 689 vs. 670 nm) and exhibit a relatively weaker uorescence emission and a higher efciency at generating singlet oxygen.

与unsubstituted锌酞菁，这些娣给取代类似物有红移Q带（在689与670 nm ）和展览相对弱uorescence排放和更高efciency产生单线态氧。

Times. Benzyl alcohol could enhance Lip production as veratryl alcohol. At its optimal concentration of 5. 0mM, Lip activity was almost twice higher than that without addition of benzyl alcohol.

用藜芦醇的类似物苯甲醇可以代替藜芦醇作诱导剂强化木素过氧化物酶的合成，加入最佳浓度5.0mM的苯甲醇可以提高木素过氧化物酶的活力近一倍。

Yuanfuliite is the Fe3+-dominant analogue of warwickite.

袁复礼石为硼钛镁石的富Fe3+类似物。

It is the cellular homolog to the retroviral oncogene viral akt.

它也是病毒癌基因的表达产物在细胞内的同源类似物。

Objective To detect and analysis epidermal growth factor receptor and phosphatase and tensin homolog deleted on chromosome ten in different malignancy brain tumors, and to evaluate their prognostic significance.

目的 探讨表皮生长因子受体和抑癌基因―人10号染色体上缺失的磷酸酶和张力蛋白类似物在常见恶性脑肿瘤中的表达及与脑肿瘤预后的关系。

Methods 414 patients who underwent ERCP were divided at random into 3 groups; group A (n=158) receiving perioperative intravenous cimetidine, 800mg/day for 3 days; group B (n=147) having hypodermic octreotide, 0.1mg, 30 minutes before and 4 hours after ERCP; group C (n=109) being given boluses of placebo.

方法将414例患者随机分为A、B、C三组，A组(158例)分别于术前一日、当日及术后一日给予西咪替丁(800mg/d，静脉滴注)，B组(147例)分别于术前30min及术后4h内给予生长抑素类似物奥曲肽0.1mg皮下注射，C组(109例)给予安慰剂。

PNA hybridizes with DNA or RNA by means of Waston Cricks base pairs complementary with high stability, affinity and selectivity. PNA not only regulates DNA replication, but also adjusts DNA transcription and translation. Many applications have been explored as a new kind of molecular biological tool and a gene targeting strategy.

肽核酸是一类人工合成的核酸类似物，PNA与核酸链以 Waston- Crick碱基配对方式稳定互补结合，具有高度的亲合性、稳定性、特异性特征，PNA能调节基因的表达作用，包括调节基因的复制、转录、翻译过程，因此 PNA有着广泛的分子生物学效应，显示出作为基因调节药物的应用潜力

The specific inhibitor of DNA methylation that is available currently is 5-Aza-2'-deoxycytidine (5Aza-dc), which forms a covalent bond with the DNA methyltransferase, thus, limiting the number of free DMT molecules for methylating DNA and then decreasing its biology activity.

目前研究较多的甲基化抑制剂是胞苷类似物5-氮杂-2'-脱氧胞苷(5-Aza-2'-deoxycytidine， 5Aza-dc)。5Aza-dc的作用机制是与DNA甲基转移酶共价结合，降低酶的生物活性。

Taking Eremothecium ashbyii (abbreviated as Eaw95. 1) as the original strain, after Υ-ray mutation, tubercidin and 8--azaguaniae (8--AG) resistant tests, a strain labeled as T〓 capable of overproducing riboflavin was obtained and its genetic stability was analyzed. Compared with Eaw95. 1, the riboflavin productivity was improved about 40% by flask--shaking tests.

以Eremothecium ashbyii为出发菌（间称Eaw95.1），通过Υ-射线诱变，杀结核菌素和8-氮杂鸟嘌呤等结构类似物的的抗性筛选，获得了一株核黄素高产菌T〓，并对菌株的遗传稳定性进行了研究，获得了较好的效果，与出发菌株相比，核黄素的摇瓶发酵产量提高了近40％。

Guanosine overproducing mutant was derived from Bacillus subtilis T1001 by using ultraviolet and diethyl sulfate. The mutant was selected directionally and step wisely on the agar plates containing methionine sulfoxide and 8 azaguanine(8 AG).

以枯草芽孢杆菌T1 0 0 1为出发菌株，经紫外线、硫酸二乙酯逐级诱变处理，选育出腺嘌呤缺陷型菌株，然后经蛋氨酸亚砜、8 氮鸟嘌呤( 8 AG)结构类似物平板定向筛选，获得鸟苷高产菌株TA2 0 8。

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。