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魔芋软腐病拮抗菌A30的筛选、鉴定及其生防作用研究 被引量:2
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作者 吴涓 夏体渊 +7 位作者 任禛 王惜 牛莉莎 陈旭 何菁 樊聂 钟宇 李金荣 《西南农业学报》 北大核心 2025年第7期1460-1467,共8页
【目的】筛选拮抗魔芋软腐病的优良菌株,为魔芋软腐病的生物防治提供参考。【方法】从云南省魔芋种植基地采集魔芋根际土壤,通过平板对峙法筛选出一株对软腐果胶杆菌(Pectobacterium aroidearum)具有防治效果的生防菌株,命名为A30,对该... 【目的】筛选拮抗魔芋软腐病的优良菌株,为魔芋软腐病的生物防治提供参考。【方法】从云南省魔芋种植基地采集魔芋根际土壤,通过平板对峙法筛选出一株对软腐果胶杆菌(Pectobacterium aroidearum)具有防治效果的生防菌株,命名为A30,对该菌株进行形态学和分子生物学鉴定;采用魔芋球茎组织接种试验和防效盆栽试验验证菌株对魔芋软腐病的防效;对菌株的促生特性进行测定,并采用盆栽试验评估其对白菜生长的促进作用。【结果】经鉴定,菌株A30为地衣芽孢杆菌(Bacillus licheniformis),该菌株对P.aroidearum具有抑制作用,抑菌圈直径为(1.20±0.08)cm。拮抗试验表明,在魔芋球茎组织接种试验中加入软腐病菌液和A30菌液比例分别为1∶1、1∶2、1∶3的混合液20μL,魔芋球茎组织病情指数较单独接种软腐病菌液的分别降低6.96、14.90、23.57,能够有效减轻魔芋软腐病的发病情况,且浓度越高拮抗效果越好;在防效盆栽试验中加入A30菌悬液,魔芋球茎组织的病情指数较单独接种软腐病菌悬液的降低20.45,相对防效达28.58%。促生试验表明,菌株A30具有固氮、产铁载体和产吲哚乙酸(IAA)的能力,A30菌悬液对白菜幼苗生长具有明显的促进作用。【结论】从魔芋根际土壤中筛选出的地衣芽孢杆菌A30具有良好的拮抗效果和促生特性,具备防控魔芋软腐病能力和一定的促生潜力。 展开更多
关键词 魔芋 软腐病 根际促生菌 地衣芽孢杆菌 生防作用
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The Comparative Study on Two Models of Syndrome Differentiation of the Hand, Foot and Mouth Disease: An Investigation Analysis of the Signs and Symptoms on 2325 Cases 被引量:1
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作者 fan nie Ke Hong +6 位作者 Hui-juan Li Xiu-hui Li Shuang-jie Li Wei Zhang Qing-jing Zhu Lu-kun Zhang Guang nie 《国际感染病学(电子版)》 CAS 2014年第1期22-30,共9页
Objective To realize the characteristics of "zheng" differentiation-treatment for hand, foot and mouth disease(HFMD), a new methodology of syndrome differentiation for different stages of HFMD has been explo... Objective To realize the characteristics of "zheng" differentiation-treatment for hand, foot and mouth disease(HFMD), a new methodology of syndrome differentiation for different stages of HFMD has been explored. Methods Total of 2 325 cases with HFMD were recorded by distributing them into exterior syndrome stage, interior syndrome stage, severe syndrome stage and recovered syndrome stage, respectively, and the main symptoms and subsidiary symptoms of different stages of HFMD have been observed. The major and minor pathogenesis of HFMD in different stages were obtained, and compared with the "2010 Guideline for the Diagnosis and Treatment of HFMD". Results It was found that the major pathogenesis of exterior stage was defined as "the invation of the wenevil to the defender of the body with the collaterals got involved ", and the minor as "qi deficiency"; in interior stage, "the fury of Gan-Yang" was the main pathogenesis, and "qi in chaos and qi deficiency" was the minor; in severe syndrome stage, "the damage of heart, liver and lung" was the main pathogenesis, and "qi in chaos" was the minor; and the pathogenesis of recovered stage was "qi-yin deficiency". Compared with the "2010 Guideline for the Diagnosis and Treatment of HFMD", it showed that "the obstruction of the fei-pi qi by the mixture of shi-re evil" and "the mixture of shi-re" in vivo was quite difficult to be explained in completely different context in the general situation; in the severe stage, the TCM clinical characteristics of syndrome differentiation might lose; in the early acute severe cases, the phenomenon that xin-yang and fei-qi almost ran out was difficult to be observed, then, the line between the severe and the acute severe became vague.Conclusions The theory of syndrome differentiation by stages of HFMD was reasonable in the actual situation of clinical description on HFMD which was expected to be further tested and widely applied in the "zheng" differentiation-treatment of HFMD in the future. 展开更多
关键词 Hand foot and mouth disease(HFMD) Syndrome differentiation in classification Syndromes differentiation by types Syndrome factors
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The relationship between the distribution of HBcAg in liver cells and the pathological manifestations of the liver in 429 HBeAg-positive chronic HBV-infected individuals
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作者 fan nie Chang-Chun Zeng +4 位作者 Guang-Dong Tong Mu-Min Shao Xiao-Hua Le Xin Deng Da-Qiao Zhou 《Gastroenterology & Hepatology Research》 2024年第3期10-15,共6页
Background:The natural history of chronic HBV infection is typically characterized by four stages:the immune tolerance period,the immune clearance period,the immune control period,and the immune escape period.These st... Background:The natural history of chronic HBV infection is typically characterized by four stages:the immune tolerance period,the immune clearance period,the immune control period,and the immune escape period.These stages are associated with the distribution of HBcAg in liver cells;however,this relationship remains a topic of broad debate within the field of liver disease.To objectively and quantitatively measure the intracellular distribution of HBcAg,this paper aims to design a method referred to as the“layered evaluation method”and to examine its validation.Methods:The distribution of HBcAg in liver cells is assessed using Image Pro Plus image processing software,along with calculations of cytoplasmic and nuclear positive staining rates.Results:The findings indicate that the highest proportion of patients exhibited a positive cytoplasmic expression rate ranging from 0-2.5%.More than 40% of the total sample was categorized within the 0-2.5% positive nuclear expression range.The HBcAg cytoplasmic positive staining rates were classified into five levels:a cytoplasmic HBcAg positive staining rate of less than 0.05% is designated as level 0,indicating negative expression;a staining rate between 0.05% and 5% is classified as level 1;a rate from 5% to less than 10% is classified as level 2;a rate from 10% to less than 20% is classified as level 3;and a nuclear positivity rate exceeding 20% is classified as level 4.Conclusion:The inflammatory activity grade in these patients was positively correlated with the cytoplasmic distribution of HBcAg.Furthermore,the nuclear distribution rate of HBcAg was significantly higher in the G3 group compared to the other groups. 展开更多
关键词 distribution of HBcAg pathological manifestations of the liver positive staining rate
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AR:An Efficient Alliance Root Service with Decentralized Trust
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作者 Bin Zhang Yu Zhang +3 位作者 Yu-Ming Feng Wei-Zhe Zhang Dong-Cen Ji fan nie 《Journal of Computer Science & Technology》 2025年第4期1138-1154,共17页
The domain name system(DNS)provides essential services for translations between human-readable do-main names and IP addresses,which runs under global DNS roots.DNS roots face security vulnerabilities and trust risks d... The domain name system(DNS)provides essential services for translations between human-readable do-main names and IP addresses,which runs under global DNS roots.DNS roots face security vulnerabilities and trust risks due to the centralized management architecture.Several related schemes have been proposed to mitigate the security vul-nerabilities and trust risks.However,most methods on trust risks focus on verifying their mechanisms.The comparison of the actual operational effectiveness of these methods and the existing DNS is rarely disclosed.In this paper,we present a trustworthy decentralized DNS root management architecture called AR based on blockchain.Instead of all top level do-mains(TLDs)authorized by an institution,the root owner in AR has the authority over its TLDs.Our proposed AR can work with the global roots without influencing the operation of the existing DNS.A cross-national and cross-regional re-search testbed is constructed on the Internet to verify the feasibility and practicality of our proposed AR. 展开更多
关键词 domain name system(DNS) network measurement internet root security blockchain DNS
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