The surface-enhanced Raman scattering(SERS) optical fiber probes were successfully prepared by self-assembling on polyelectrolyte multilayers. Gold nanorods(Au NRs) were used as SERS enhancement material to give excel...The surface-enhanced Raman scattering(SERS) optical fiber probes were successfully prepared by self-assembling on polyelectrolyte multilayers. Gold nanorods(Au NRs) were used as SERS enhancement material to give excellent biological affinity and stability to the SERS optical fiber probes. Au NRs were synthesized by seed growth method. The synergistic effect between AgNO_(3) and surfactant was investigated, and the highest yield was found when AgNO_(3) was 500 uL. Meanwhile, different SERS optical fiber probes were obtained by selecting silane coupling agent, polyelectrolyte multilayer and graphene oxide(GO) to treat quartz fiber. It was found that the SERS optical fiber probes obtained by the self-assembled on polyelectrolyte multilayers method performed better than those by other methods. In addition, Mapping was combined with finite element simulation to analyze the electromagnetic field distribution at the fiber end face.The electromagnetic field distribution of Au NRs was investigated, the difference of electromagnetic field intensity around the Au NRs with different arrangements was compared, the strongest signal was obtained when the Au NRs were head-to-head. Finally, sensitivity of the optimized SERS optical fiber probes could reach 10^(-9)mol/L, with excellent stability and repeatability.展开更多
目的初步验证一种肿瘤患者营养筛查工具(Malnutrition Screening Tool for Cancer patients,MSTC)对消化道恶性肿瘤患者进行营养风险筛查的适用性。方法对2020年7月至12月在我院采用不同治疗方式进行治疗的消化道肿瘤患者进行横断面调...目的初步验证一种肿瘤患者营养筛查工具(Malnutrition Screening Tool for Cancer patients,MSTC)对消化道恶性肿瘤患者进行营养风险筛查的适用性。方法对2020年7月至12月在我院采用不同治疗方式进行治疗的消化道肿瘤患者进行横断面调查研究,每名患者同时采用MSTC量表及营养风险筛查2002(NRS 2002)评分表进行营养风险筛查及评估。采用二分类交叉列表方式评价两种方法的相关性、灵敏度、特异度、阳性及阴性预测值等指标。结果共158例符合条件患者完成调查,根据NRS 2002评分有营养风险患者占55.1%;MSTC营养风险指数P临界值为0.7285时,MSTC模型灵敏度为98.9%,特异性为74.6%,阳性预测值和阴性预测值分别为82.7%、98.1%,与NRS2002评价结果高度一致(kappa值0.752,P<0.0001)。结论MSTC与NRS 2002在消化道肿瘤患者的营养风险筛查结果具有高度一致性。展开更多
基金Funded by National Natural Science Foundation of China (Nos.51372179, 51772224)the Open Projects Foundation of Yangtze Optical Fiber and Cable Joint Stock Limited Company (YOFC)(No.SKLD1705)。
文摘The surface-enhanced Raman scattering(SERS) optical fiber probes were successfully prepared by self-assembling on polyelectrolyte multilayers. Gold nanorods(Au NRs) were used as SERS enhancement material to give excellent biological affinity and stability to the SERS optical fiber probes. Au NRs were synthesized by seed growth method. The synergistic effect between AgNO_(3) and surfactant was investigated, and the highest yield was found when AgNO_(3) was 500 uL. Meanwhile, different SERS optical fiber probes were obtained by selecting silane coupling agent, polyelectrolyte multilayer and graphene oxide(GO) to treat quartz fiber. It was found that the SERS optical fiber probes obtained by the self-assembled on polyelectrolyte multilayers method performed better than those by other methods. In addition, Mapping was combined with finite element simulation to analyze the electromagnetic field distribution at the fiber end face.The electromagnetic field distribution of Au NRs was investigated, the difference of electromagnetic field intensity around the Au NRs with different arrangements was compared, the strongest signal was obtained when the Au NRs were head-to-head. Finally, sensitivity of the optimized SERS optical fiber probes could reach 10^(-9)mol/L, with excellent stability and repeatability.
文摘目的初步验证一种肿瘤患者营养筛查工具(Malnutrition Screening Tool for Cancer patients,MSTC)对消化道恶性肿瘤患者进行营养风险筛查的适用性。方法对2020年7月至12月在我院采用不同治疗方式进行治疗的消化道肿瘤患者进行横断面调查研究,每名患者同时采用MSTC量表及营养风险筛查2002(NRS 2002)评分表进行营养风险筛查及评估。采用二分类交叉列表方式评价两种方法的相关性、灵敏度、特异度、阳性及阴性预测值等指标。结果共158例符合条件患者完成调查,根据NRS 2002评分有营养风险患者占55.1%;MSTC营养风险指数P临界值为0.7285时,MSTC模型灵敏度为98.9%,特异性为74.6%,阳性预测值和阴性预测值分别为82.7%、98.1%,与NRS2002评价结果高度一致(kappa值0.752,P<0.0001)。结论MSTC与NRS 2002在消化道肿瘤患者的营养风险筛查结果具有高度一致性。