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onistic bacteria were cultured for two days, their culture exerted外露的 obvious inhibition抑制 on pathogenic fungi of Slash pine damping-- such as Rhizoctonia solani丝核菌 and Alternaria alternata链格孢菌．But C23 did not show any inhibition on Fusarium sp镰刀菌．In the indoor experiment，C23 showed certain control effects．But outdoor, C23 did not show any prevention effect. Strain C23 could be colonized in Slash pine root湿地松根部定殖. But the distribution of C23 in different parts of the root showed no rules. In the process of colonization, the number of C23 kept rising with the time passing. Forty days later, there was the most amount of C23 within the root，then gradually reduced．
(洋葱伯克霍尔德菌C23是一株从湿地松根部分离到的拮抗细菌。在培养2d后，其培养物对丝核菌(Rhizoctonia solani)和链格孢菌( Ahemaria alternata)均表现出明显抑制效果，但对镰刀菌(Fusarium sp)几乎没有抑制作用。在室内防病试验时，C23表现出一定的防病效果，但在室外，没有表现出防病效果。菌株C23可在湿地松根部定殖，但是在根部不同部位的分布并没有规律循。在定殖过程中，C23菌株在松苗根部的菌量随着时间的增长而增加。接种后40d， 菌量达到峰值，而后数量逐渐减少。) 
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即概述性摘要或简介性摘要,多用于理论性较强的论文,如专论、评论、综述、数学计算、理论推导等,主要概括论文的主要论点、分析过程和结论。该类摘要很少传递具体数据,而只告诉读者本文采用了什么方法，讨论了什么问题，得出了什么结论。它缺少实质性和具体内容，文字上高度概括、简练。篇幅较短，字数一般为50-100字。如综述、评述和单个专题的研究论文适于用指示性摘要。一些研究论文所涉及的知识分散、庞大，论文的主要内容不系统，用报道性摘要不能用200-300字概括全，而又必须对这类文献进行高度概括，故适合写作指示性摘要。
例1Abstract: Pentostatin喷司他丁 was a kind of purine analog拟嘌呤类物质 which was originally isolated from the species of bacteria Streptomycin 链霉素菌antibiotics. Pentostatin is used to treat hairy cell leukemia毛细胞白血病 and chronic lymphocytic leukemia慢性淋巴细胞白血病. In this paper, the total synthesis of Pentostatin was reviewed and each synthetic route was analyzed. Both merits and limitations of synthetic method were discussed．
(喷司他丁是从链霉素菌发酵产生的发酵液中分离出来的拟嘌呤类物质。对毛细胞白血病、慢性淋巴细胞白血病等具有特殊疗效。综述了喷司他丁的合成方法研究进展，分析了其合成路线，并讨论了各合成方法的优缺点。)

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Plant cells encase themselves within a complex polysaccharide多糖 wall, which const本论文由英语论文网提供整理，提供论文代写，英语论文代写，代写论文，代写英语论文，代写留学生论文，代写英文论文，留学生论文代写相关核心关键词搜索。