Ninety honey samples of five different floral origins （chestnut, eucalyptus, citrus, multifloral and sulla） from nine areas of southern Italy, were screened to evaluate the polyphenol content by spectrphotometric me...Ninety honey samples of five different floral origins （chestnut, eucalyptus, citrus, multifloral and sulla） from nine areas of southern Italy, were screened to evaluate the polyphenol content by spectrphotometric methods, the antioxidant activity by ABTS （2,2＇ -azino-bis-（3-ethylbenzothiazoline-6-sulfonic acid？ diamonium salt, FRAP （ferric reducing antioxidant power） and DPPH （I,I-diphenyl-2-picrylhydrazyl） assays, and the colorimetric characteristics by spectrophotometric and CIE （Commission Internationale de I＇Eclairage） L ＊a＊b＊ methods. Moreover, the correlations between the analysed parameters were studied. Overall, the results showed that all the honey samples presented high total phenolic and flavonoid contents （12.23 mg gallic acid equivalent/lOOg honey and 8.16 mg quercetin equivalent/lOOg honey, respectively）, and a high antioxidant activity （59.17%, 66.50% and 349.11 11M Fe （II） for ABTS, DPPH and FRAP assays, respectively）, but those results differ widely according to the honey types, suggesting that honey composition has been influenced by its floral and geographical origin. In particular, the darkest honeys, such as chestnut honey （L ＊ = 59.94; 1.26 AU）, showed the highest polyphenol content and the highest antioxidant activity. Honeys from the areas with major anthropogenic activities and high population density presented the highest antioxidant activity. Correlations between the analysed parameters were statistically significant （P 〈 0.05）, suggesting that the polyphenol content is correlated with the antioxidant activity and colour of honey.展开更多
O432.3 97052832低亮度条件下CRT的颜色复制研究=Colour reproductionresearch on CRT under low luminancecondition[刊,中]/徐红,朱正芳(北京理工大学.北京(100081)),周丰昆,陈淑芳(中科院长春光机所应用光学国家重点实验室.吉林,长春...O432.3 97052832低亮度条件下CRT的颜色复制研究=Colour reproductionresearch on CRT under low luminancecondition[刊,中]/徐红,朱正芳(北京理工大学.北京(100081)),周丰昆,陈淑芳(中科院长春光机所应用光学国家重点实验室.吉林,长春(130022))∥光学技术.—1996,(4).—35—38通过三刺激值测量及数学校正方法,对低亮度条件下CRT的色度特性作了分析,发现该条件下CRT仍然具有通道独立性和色坐标一致性。因此,采用了适用中高亮度条件的数学模型,对低亮度条件下CRT的颜色复制进行预测并得到了与中亮度条件下相当的预测精度。表7参2(方舟)展开更多
O432．3 2005064013 数字彩色扩印系统的色空间变换和色域研究=Study of color space conversion and gamut calculation of digital col or paper printer[刊,中]/徐艳芳(天津大学精密仪器与光 电子工程学院,光电信息技术科学教育部重...O432．3 2005064013 数字彩色扩印系统的色空间变换和色域研究=Study of color space conversion and gamut calculation of digital col or paper printer[刊,中]/徐艳芳(天津大学精密仪器与光 电子工程学院,光电信息技术科学教育部重点实验室.天 津(300072)),刘文耀∥照明工程学报．-2004,15(3).-5-9 提出了一种用于数字彩色扩印系统的色空间变换和 色域边界面确定方法。展开更多
O432.3 97052830CRT颜色再现中的"黑点"对CRT色度特性的影响=Influence of black point on colorimetric characterizationwhen producing desired colors onCRT monitors[刊,中]/黄丽琼(西安西北光电仪器厂.陕西,西安(710043...O432.3 97052830CRT颜色再现中的"黑点"对CRT色度特性的影响=Influence of black point on colorimetric characterizationwhen producing desired colors onCRT monitors[刊,中]/黄丽琼(西安西北光电仪器厂.陕西,西安(710043)),汤顺青(北京理工大学.北京(100081))//光学技术.—1996,(5).—12—14,20利用高精度的PRICHART MODEL 1980B光谱辐射计,对SONY公司的PVM—1442QM彩色监视器进行大量色度测试,并在测量过程中对PR1980B光谱辐射计的测量条件进行了选择,以提高信噪比。在此基础上,引入了"黑点"概念,依靠大量的实验数据,提出了低信号电平时,色品坐标恒定性、枪的独立性仍成立的观点。图1表4参4(方舟)展开更多
O432.3 2001031532光源相关色温计算方法的讨论=Discussion on calculationmethod for correlated color temperatureof light Sources[刊,中]/代彩红,于家琳(中国计量科学研究院.北京(100013))∥计量学报.-2000,
文摘Ninety honey samples of five different floral origins （chestnut, eucalyptus, citrus, multifloral and sulla） from nine areas of southern Italy, were screened to evaluate the polyphenol content by spectrphotometric methods, the antioxidant activity by ABTS （2,2＇ -azino-bis-（3-ethylbenzothiazoline-6-sulfonic acid？ diamonium salt, FRAP （ferric reducing antioxidant power） and DPPH （I,I-diphenyl-2-picrylhydrazyl） assays, and the colorimetric characteristics by spectrophotometric and CIE （Commission Internationale de I＇Eclairage） L ＊a＊b＊ methods. Moreover, the correlations between the analysed parameters were studied. Overall, the results showed that all the honey samples presented high total phenolic and flavonoid contents （12.23 mg gallic acid equivalent/lOOg honey and 8.16 mg quercetin equivalent/lOOg honey, respectively）, and a high antioxidant activity （59.17%, 66.50% and 349.11 11M Fe （II） for ABTS, DPPH and FRAP assays, respectively）, but those results differ widely according to the honey types, suggesting that honey composition has been influenced by its floral and geographical origin. In particular, the darkest honeys, such as chestnut honey （L ＊ = 59.94; 1.26 AU）, showed the highest polyphenol content and the highest antioxidant activity. Honeys from the areas with major anthropogenic activities and high population density presented the highest antioxidant activity. Correlations between the analysed parameters were statistically significant （P 〈 0.05）, suggesting that the polyphenol content is correlated with the antioxidant activity and colour of honey.
文摘O432.3 97052832低亮度条件下CRT的颜色复制研究=Colour reproductionresearch on CRT under low luminancecondition[刊,中]/徐红,朱正芳(北京理工大学.北京(100081)),周丰昆,陈淑芳(中科院长春光机所应用光学国家重点实验室.吉林,长春(130022))∥光学技术.—1996,(4).—35—38通过三刺激值测量及数学校正方法,对低亮度条件下CRT的色度特性作了分析,发现该条件下CRT仍然具有通道独立性和色坐标一致性。因此,采用了适用中高亮度条件的数学模型,对低亮度条件下CRT的颜色复制进行预测并得到了与中亮度条件下相当的预测精度。表7参2(方舟)
文摘O432．3 2005064013 数字彩色扩印系统的色空间变换和色域研究=Study of color space conversion and gamut calculation of digital col or paper printer[刊,中]/徐艳芳(天津大学精密仪器与光 电子工程学院,光电信息技术科学教育部重点实验室.天 津(300072)),刘文耀∥照明工程学报．-2004,15(3).-5-9 提出了一种用于数字彩色扩印系统的色空间变换和 色域边界面确定方法。
文摘O432.3 97052830CRT颜色再现中的"黑点"对CRT色度特性的影响=Influence of black point on colorimetric characterizationwhen producing desired colors onCRT monitors[刊,中]/黄丽琼(西安西北光电仪器厂.陕西,西安(710043)),汤顺青(北京理工大学.北京(100081))//光学技术.—1996,(5).—12—14,20利用高精度的PRICHART MODEL 1980B光谱辐射计,对SONY公司的PVM—1442QM彩色监视器进行大量色度测试,并在测量过程中对PR1980B光谱辐射计的测量条件进行了选择,以提高信噪比。在此基础上,引入了"黑点"概念,依靠大量的实验数据,提出了低信号电平时,色品坐标恒定性、枪的独立性仍成立的观点。图1表4参4(方舟)
文摘O432.3 2001031532光源相关色温计算方法的讨论=Discussion on calculationmethod for correlated color temperatureof light Sources[刊,中]/代彩红,于家琳(中国计量科学研究院.北京(100013))∥计量学报.-2000,
