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- A test of using RT-PCR means to distinguish the virulent and avirulent strains of NDV RT-PCR法快速鉴别新城疫强弱毒株的试验
- Rapid molecular differentiation of virulent and avirulent strains of Newcastle disease virus with RT-PCR technique 用反转录-聚合酶链反应快速鉴别新城疫病毒
- Differentiation of Virulent and Avirulent Strains of New Castle Disease Virus in Shandong Province by RT-PCR and Virology Method 应用RT-PCR和病毒学方法诊断山东省鸡新城疫感染的比较研究
- virulent and avirulent strains 强弱毒株
- Detection and identification of Mycoplasma galliseptlcum virulent and avirulent vaccine strains by multiplex polymerase chain reaction 多重聚合酶链反应快速检测鉴别鸡毒支原体强毒株和弱毒疫苗株的研究
- Such infections appear to be more virulent and more easily spread between people than earlier strains. 这类感染似乎比较早出现的菌种更恶毒，并更容易在人们之间蔓延。
- Still, this particularly virulent and infectious strain of the flu virus is thought to have killed as many as 40 million people around the world between 1918 and 1919. 即便如此，这株毒性特强、传染性甚高的流感病毒于1918~1919年肆虐全球，据信造成4000万人死亡。
- Luo K,Wang Z.Investigation on controlling of Bacterial wilt with antagonistic Pseudomonas spp and avirulent bacteriocinogenic strain of P.solanacearum[J].Acta Phytopathologica Sinica,1983,13(1):51-55. [1]罗宽;王庄.;利用拮抗的Pseudomonas spp和无致病力的P
- This paper deals with the transfer method and mechanism of hypovirulence factors; the mixed system of virulent and hypovirulent strains; the super microcosmic structure and physiological characters in the two kinds of hyphae. 本文阐述了弱毒因子的传递方式、理，强、毒菌系混合体系，两类菌丝的超微结构以及生理特性。
- AIthough the 359 bp fragment probe spans the sequence encoding the proteolytic clea-vage site of the Fo protein,it could not differentiate the genome RNA of virulentstrain from the one of avirulent strain. 试验结果表明：尽管该探钎含有编码Fo蛋白酶切位点序列的碱基顺序,但它还是不能把NDV的强、弱毒株区分开。
- The artificial infection experiment showed that 80 percent of strains (8/10) were highly virulent and the disease was easily reproduced by subcutaneous, intramuscular or webfoot injection. 人工感染试验表明，80%25（8/10）菌株毒力强，皮下、肌肉、足蹼3种途径均易复制该病；
- Because a variety of reasons are popularized hard,replace the new-style and avirulent product of benzene preparation. 替代苯制剂的新型无毒产品由于种种原因难以推广。
- Its advantage is construction convenient, integrated cost is low, time limit for a project is short, and avirulent environmental protection. 它的优点是施工方便、综合造价低，工期短，且无毒环保。
- This tasting for virescent cream account other people, neuter and avirulent, have protect a skin to defend change action. 本品为淡绿色膏状物,中性无毒,有护皮保革作用。
- I hit him fair and square on the jaw. 我不偏不倚打中他的下巴。
- Although the Haijibu that be braided with 100% quartz and becomes also won't release toxic gas and aerosol when be heated, have infallible but security and avirulent sex. 用100%25石英编织而成的海吉布即使在受热时也不会释放出有毒的气体和烟雾，具有绝对可靠可安全性和无毒性。
- It is a fact of life and you must face it. 这是严酷的现实，你必须面对它。
- The Antivirus Mechanism of Avirulent Strain CMV S52 毒疫苗CMV-S52的抗病毒机理
- She and I can't live under the same roof. 她和我不能住在一起。
- She had to scrimp and save to pay for her holiday. 她不得不为付假期的费用而苦苦攒钱。
