查询词典 photosensitizer

Photosensitizer rose bengal reacts with O 2 to generate singlet oxygen ( 1O 2) under illumination .

光敏剂RB在光照射下与O2反应产生1O2，1O2与组氨酸或咪唑反应的中间产物使RNO发生氧化，导致RNO在440nm处吸光度减小，此即为RNO脱色反应。

Because metal naphthalocyanine has larger conjugate system than MPc does, and its main absorption peaks shift to 750～850nm region, which is optimal for light penetrating tissue. That would endow MNc with strong photodynamic effect and weak phototoxic by-effect. And it would be a new and practical PDT photosensitizer.

本文考虑到比金属酞菁具有更大共轭体系的金属萘酞菁配合物（Metal Naphthalocyanines，简称MNc）其电子吸收光谱Q带主吸收峰比金属酞菁红移100—150nm，达到750—850nm范围，位于人体最佳透射波段的近红外区，这既可使之具有较高的激发效率和较强的肿瘤细胞杀伤效应，又可更进一步降低可见光引起的光毒副作用，可望成为新一类有应用前景的抗癌光敏剂。

Using acetone as a photosensitizer,and N3· as an oxidant by pulse radiolysis method,the induced oxidation of cyclic-Phe-His in aqueous solution has been also reported in this paper,results similar to the photoionization of cyclic-Phe-His have been found.

而具有亲电子性的丙酮能在该环肽的苯丙氨酸残基的苯环上抽取电子，形成320nm和410nm的特征吸收峰，求出了自由基的有关动力学参数，并用脉冲辐解动态吸收光谱法印证了上述结果。

METHODS: 40 cases were classified stage IV with lumen obstruction after they failed all other treatment regimens. PDT was performed witn 630nm light delivered through cylinder diffusing tip quartz fibers passed through the biopsy channel of a flexible endoscope 48h after intravenous injection of the photosensitizer photofrin. PDT endoscopy was repeated and necrotic tissue was mechanically removed and, if necessary, that site or other new sites were treated after 48 hours. Two days after this another endoscopy was performed and the necrotic tissue was mechanically removed. Endoscopy was repeated one month after PDT and periodically thereafter as needed to re-treat symptomatic residual tumor.

40例肿瘤患者均属于IV期，所有患者都经过化疗、放疗或其他方法治疗无法解除腔道梗阻或不完全梗阻，部分完全梗阻患者结合其他治疗手段解除梗阻，光敏剂为photofrin，按2mg/kg体重静脉滴注，48小时后经内镜导入光导纤维给以630nm（DIOMED半导体激光治疗机）的激光照射，2天后经内镜清除坏死组织并对原有病灶和新发现病灶给以复照，之后根据具体情况给患者的病灶部位清除坏死组织。

Methods Two lines of human pancreatic carcinoma cell P3 and SW1990 were studied to investigate the killing role of PDT with hematoporphyrin derivative as photosensitizer and sodium lamp as light source. The cultured cells were treated with serial concentrations of HPD followed by irradiation of different dosages of visible light, then MTT colorometric assay was applied to measure the relative inhibitory rate of PDT for the cells.

以2株人胰腺癌细胞系P3和SW1990为研究对象，采用血卟啉衍生物作为光敏剂，用高压钠灯（功率密度25 mW/cm2为光源，以系列浓度的HPD经不同剂量的光照后，用MTT法测定PDT对胰腺癌细胞的相对抑制率。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。