The extensive use of Schott BG3 glass filters in auroral physics demands an accurate characterization of the filter performance when observing actual auroral structures. We present observations from two identical Ando...The extensive use of Schott BG3 glass filters in auroral physics demands an accurate characterization of the filter performance when observing actual auroral structures. We present observations from two identical Andor DU-888 imagers operated side-by-side, one equipped with a BG3 glass filter and the other one unfiltered, observing the same auroral structures. The BG3 glass filter decreased the overall signal levels, increasing the relative intensity variations of the fast pulsating aurora by a few percent. This, however, also produced a slightly decreased signal-to-noise ratio, making it more difficult to quantify the rapidly varying auroral structures. This comparison shows that BG3 glass filters can be useful in reducing the overall signal levels which is important in dynamic, bright, substorm onset aurora, where EMCCD imager saturation has been known to occur. Consequently their use does not significantly affect the observation of the dynamics within the aurora but it also does not enhance the ability to quantify the features of rapidly varying auroral structures.展开更多
本研究在资源库中发现了一个大粒品种,暂被命名为big grain 3(bg3)。该品种的千粒重明显高于常规水稻品种。通过遗传分析表明该大粒性状为数量性状。与R28相比,bg3的籽粒长和宽分别增加了36.45%和25.81%,呈极显著增加。利用F2代群体中与...本研究在资源库中发现了一个大粒品种,暂被命名为big grain 3(bg3)。该品种的千粒重明显高于常规水稻品种。通过遗传分析表明该大粒性状为数量性状。与R28相比,bg3的籽粒长和宽分别增加了36.45%和25.81%,呈极显著增加。利用F2代群体中与R28相同粒型的植株提取DNA用于定位主效基因BG3,最终将BG3定位于第二染色体长臂的SSR引物RM1342和RM6之间,其遗传距离分别为0.027 c M和0.033 c M。通过测序比对发现,Os02g47280的第二个外显子有两个碱基的变化,使得BG3的编码提前终止。该结果为后续的研究提供了依据。展开更多
文摘The extensive use of Schott BG3 glass filters in auroral physics demands an accurate characterization of the filter performance when observing actual auroral structures. We present observations from two identical Andor DU-888 imagers operated side-by-side, one equipped with a BG3 glass filter and the other one unfiltered, observing the same auroral structures. The BG3 glass filter decreased the overall signal levels, increasing the relative intensity variations of the fast pulsating aurora by a few percent. This, however, also produced a slightly decreased signal-to-noise ratio, making it more difficult to quantify the rapidly varying auroral structures. This comparison shows that BG3 glass filters can be useful in reducing the overall signal levels which is important in dynamic, bright, substorm onset aurora, where EMCCD imager saturation has been known to occur. Consequently their use does not significantly affect the observation of the dynamics within the aurora but it also does not enhance the ability to quantify the features of rapidly varying auroral structures.
文摘本研究在资源库中发现了一个大粒品种,暂被命名为big grain 3(bg3)。该品种的千粒重明显高于常规水稻品种。通过遗传分析表明该大粒性状为数量性状。与R28相比,bg3的籽粒长和宽分别增加了36.45%和25.81%,呈极显著增加。利用F2代群体中与R28相同粒型的植株提取DNA用于定位主效基因BG3,最终将BG3定位于第二染色体长臂的SSR引物RM1342和RM6之间,其遗传距离分别为0.027 c M和0.033 c M。通过测序比对发现,Os02g47280的第二个外显子有两个碱基的变化,使得BG3的编码提前终止。该结果为后续的研究提供了依据。
