The paper discusses the experimental results pointing to the efficient channel of the CO vibrational to the C2 electronic energy-transfer. The radiation spectra of the d3Hg electronic state of C2 molecule are investig...The paper discusses the experimental results pointing to the efficient channel of the CO vibrational to the C2 electronic energy-transfer. The radiation spectra of the d3Hg electronic state of C2 molecule are investigated and the relation of their kinetics to a vibrational excitation of CO molecules in the He-CO-O2 plasma is discussed. The changes of CO VED （vibrational energy distribution） were imposed by an application of a laser resonator to the discharge tube under investigation. Strong correlation has been found in experiments between concentrations of vibrationally excited CO molecules and the electronically excited state d31qg of C2 molecule. Modulation of the intensity of lasing oscillation cased marked modulation of the intensity of the emission from d3Hg （Swan bands）. It was found that the vibrational levels 12 〈 w 〈 20 of the CO molecules most effect on the concentration of the C2 （d3flg）. The facts discussed above most probably point to the existence of efficient channel for the VE energy transfer： CO （w） ＋ C2 →CO ＋ C2 （d3II）. The efficiency of this channel increases with the growth of populations of high vibrational levels of CO （X1∑, w）.展开更多
目的探讨超声造影(contrast-enhanced ultrasound,CEUS)联合丝/苏氨酸特异性激酶(serine-threonine-threonine protein kinase,BRAF)基因V600E(BRAFV600E)突变检测对细胞学意义不明确类型结节的诊断价值。方法回顾性分析129个甲状腺超...目的探讨超声造影(contrast-enhanced ultrasound,CEUS)联合丝/苏氨酸特异性激酶(serine-threonine-threonine protein kinase,BRAF)基因V600E(BRAFV600E)突变检测对细胞学意义不明确类型结节的诊断价值。方法回顾性分析129个甲状腺超声引导下细针穿刺意义不明结节的常规超声检查、CEUS及BRAFV600E基因检测的资料,以BRAFV600E阳性和CEUS不均匀低增强等表现作为甲状腺结节恶性诊断标准,并与术后病理学结果做对照,绘制ROC曲线,比较CEUS、BRAFV600E基因检测及CEUS联合BRAFV600E基因检测对该类结节良恶性的鉴别诊断价值。结果CEUS、BRAFV600E基因检测对细针穿刺细胞学意义不明确结节诊断良恶性的敏感性、特异性、准确性分别为86.7%、83.3%、85.3%和72.0%、100%、83.7%。CEUS对细针穿刺细胞学意义不明确结节诊断良恶性的敏感性和准确性高于BRAFV600E基因检测,差异有统计学意义(均P<0.001),而其特异性低于BRAFV600E(P<0.001)。两种方法联合诊断该类结节良恶性的敏感性、特异性、准确性分别为94.7%、83.3%、89.9%,联合诊断效率最高,差异有统计学意义(P<0.001),其ROC曲线下面积(AUC)高于BRAFV600E基因检测及CEUS检查(0.951对0.860、0.901)。结论CEUS联合BRAFV600E基因检测有助于提高鉴别甲状腺超声引导下细针穿刺意义不明结节病灶良恶性的准确性。展开更多
文摘The paper discusses the experimental results pointing to the efficient channel of the CO vibrational to the C2 electronic energy-transfer. The radiation spectra of the d3Hg electronic state of C2 molecule are investigated and the relation of their kinetics to a vibrational excitation of CO molecules in the He-CO-O2 plasma is discussed. The changes of CO VED （vibrational energy distribution） were imposed by an application of a laser resonator to the discharge tube under investigation. Strong correlation has been found in experiments between concentrations of vibrationally excited CO molecules and the electronically excited state d31qg of C2 molecule. Modulation of the intensity of lasing oscillation cased marked modulation of the intensity of the emission from d3Hg （Swan bands）. It was found that the vibrational levels 12 〈 w 〈 20 of the CO molecules most effect on the concentration of the C2 （d3flg）. The facts discussed above most probably point to the existence of efficient channel for the VE energy transfer： CO （w） ＋ C2 →CO ＋ C2 （d3II）. The efficiency of this channel increases with the growth of populations of high vibrational levels of CO （X1∑, w）.
文摘目的探讨超声造影(contrast-enhanced ultrasound,CEUS)联合丝/苏氨酸特异性激酶(serine-threonine-threonine protein kinase,BRAF)基因V600E(BRAFV600E)突变检测对细胞学意义不明确类型结节的诊断价值。方法回顾性分析129个甲状腺超声引导下细针穿刺意义不明结节的常规超声检查、CEUS及BRAFV600E基因检测的资料,以BRAFV600E阳性和CEUS不均匀低增强等表现作为甲状腺结节恶性诊断标准,并与术后病理学结果做对照,绘制ROC曲线,比较CEUS、BRAFV600E基因检测及CEUS联合BRAFV600E基因检测对该类结节良恶性的鉴别诊断价值。结果CEUS、BRAFV600E基因检测对细针穿刺细胞学意义不明确结节诊断良恶性的敏感性、特异性、准确性分别为86.7%、83.3%、85.3%和72.0%、100%、83.7%。CEUS对细针穿刺细胞学意义不明确结节诊断良恶性的敏感性和准确性高于BRAFV600E基因检测,差异有统计学意义(均P<0.001),而其特异性低于BRAFV600E(P<0.001)。两种方法联合诊断该类结节良恶性的敏感性、特异性、准确性分别为94.7%、83.3%、89.9%,联合诊断效率最高,差异有统计学意义(P<0.001),其ROC曲线下面积(AUC)高于BRAFV600E基因检测及CEUS检查(0.951对0.860、0.901)。结论CEUS联合BRAFV600E基因检测有助于提高鉴别甲状腺超声引导下细针穿刺意义不明结节病灶良恶性的准确性。
