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更新時(shí)間：2025.04.26
無花果葉形性狀的SCAR分子標(biāo)記

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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.

圓弧線葉形三葉羅茨風(fēng)機(jī)的流量特性

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給出了圓弧線葉形三葉羅茨風(fēng)機(jī)的面積利用系數(shù)的計(jì)算,并且對(duì)理論流量、實(shí)際流量和容積效率進(jìn)行了分析。算例說明,當(dāng)徑距比在1.35～1.6的范圍內(nèi)取值時(shí),可獲得較大的面積利用系數(shù);當(dāng)面積利用系數(shù)λ>0.322時(shí),風(fēng)機(jī)的容積效率η>0.85,有較好的流量特性。

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