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更新时间:2024.04.13
无花果叶形性状的SCAR分子标记

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A RAPD marker specific to leaf shape of fig(Ficus carica)was developed and converted into SCAR marker for germplasm identification.RAPD amplifications with random primers S_ 2082 produced a unique fragment linking to the non-cordate base leaf shape.The unique fragment was extracted,cloned and sequenced.Sequencing results indicated that the size of the fragment was 1 640 bp.Specific primers were designed based on its sequence and used in SCAR-PCR,and it was showed that the RAPD marker from S_ 2082-1640 was successfully converted into SCAR marker.

圆弧线叶形三叶罗茨风机的流量特性

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给出了圆弧线叶形三叶罗茨风机的面积利用系数的计算,并且对理论流量、实际流量和容积效率进行了分析。算例说明,当径距比在1.35~1.6的范围内取值时,可获得较大的面积利用系数;当面积利用系数λ>0.322时,风机的容积效率η>0.85,有较好的流量特性。

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