After systematic investigation and research on the bamboo pests in fujian bamboo production areas, the bamboo pests in fujian province was classified as 97 species, 15 of which was shoot pests, 53 of which was leaf pests, 5 of which was harmful acarids, 17 of which was stem pests, and 7 of which was rhizome pests
When the moment made by material on turning plate is greater than that of heavy hammer and rocker, the disc will open adown to discharge
We gave them the opportunity to express their feelings, to affirm themselves.
Aileron servo pull rod should be vertical to the shaft of aileron basically
Newcastle disease virus ( ndv ) strain 695, a thermostable nature avirulent strain, were replicated in embryonated chicken eggsand its rna was extracted from allantoic fluid. referred to the reported sequence of f gene, a pair of primers were designed and synthesized. f gene of ndv b95 strain was amplified by rt - pcr, the pcr products were checked by agrose gel electrophoresis and purified by agrose gel fracion method
利用從國外引進的新城疫熱穩定性天然弱毒b _ （ 95 ）株接種spf雞胚繁殖病毒，經處理后提取病毒的基因組rna ，參考國內外發表的ndv融合蛋白基因序列，設計一對特異性引物，經反轉錄聚合酶鏈式反應（ rt - pcr ）擴增出約1700bp大小的特異性片段，將此片段回收純化后，利用t - a克隆技術將其克隆到pgem - t - easy克隆載體中，再轉化大腸桿菌jm109感受態細胞，轉化后經分子量比較、 pcr鑒定和酶切分析篩選陽性克隆。