文献 | 量子荧光|微型光纤光谱仪-ag贵宾会

batesian and aggressive mimics are considered to be under selective pressure to resemble their models, whereas signal receivers are under selection to discriminate between mimics and models. however, the perceptual ability of signal receivers to discriminate between mimics and models is rarely studied. here we examined 15 model–mimic coral reef fish pairs using nonsubjective methods to judge the accuracy of mimics in terms of color and luminance. we then investigated the potential ability of fish with various visual systems to discriminate between model and mimic colors using theoretical vision models. we found the majority of mimics closely resembled models in terms of color and luminance from a nonsubjective perspective. however, fish that have potentially trichromatic (3 distinct cone photoreceptors) visual systems with ultraviolet sensitivity had a much better capacity to discriminate between models and mimics compared with fish with midrange sensitivity or dichromatic (2 cone photoreceptors) fish. the spectral reflectance of color patches reflected by models and mimics became more similar with an increase in depth, indicating that signal receivers may be more likely to distinguish mimics from models in habitats located closer to the surface. there was no such change in luminance contrast with depth. the selection pressure on mimics to accurately resemble their model is therefore predicted to vary depending on the visual system of the signal receiver and the light environment. key words: aggressive mimicry, animal signaling, batesian, color vision, signal accuracy. [behav ecol 20:459–468 (2009)]

光致荧光技术及荧光光谱成像技术以其实时、微创或无创、副作用小及灵敏度高等特点，在肿瘤疾病的诊断上够得到了广泛地应用。癌症也称恶性肿瘤，是指机体在各种致瘤因素作用下，局部组织细胞异常增生而形成的局部肿块。恶性肿瘤可以破坏组织、器官的结构和功能，患者最终可能由于器官功能衰竭而死亡。因此对恶性肿瘤的早期诊断就显得尤为重要。

动脉血气分析是监测气体交换和代谢的重要手段，尤其是呼吸衰竭等危重病人及手术麻醉期间。但是传统的血气分析须要间断采集血样，送实验室用血气分析仪分析，检验报告滞后，对于需要长期监测血气的危重病人，则需要反复多次抽血，极为不便，且易发生医源性感染。

尝试利用漫反射光谱检测鲜红斑痣皮肤的氧含量, 并用于监测光动力治疗中鲜红斑痣皮肤氧含量的变化?采用ocean optics 公司生产的usb2000 微型光纤光谱仪采集pws 皮肤的漫反射光谱, 根据氧合血红蛋白与还原血红蛋白(皮肤中两种主要的吸光基团)吸收光谱的差异, 分析病变皮肤氧含量及治疗中氧含量的变化趋势。对14 例pws 患者进行治疗中皮肤漫反射光谱的监测。结果显示, 治疗前不同类型pws 皮肤氧含量不同, 光动力治疗中大部分p4、p5 型pws 皮肤氧含量没有显著降低, p6 型pws 皮肤氧含量降低明显，表明现有的漫反射光谱法可定性监测pws 皮肤氧含量的变化趋势?通过进一步提高仪器的灵敏度并建立相应的光谱分析方法, 有望更准确地测量pws 皮肤中的氧含量变化。