为了获得鸡热休克蛋白70(heat shock protein 70,HSP70)基因启动子区CpG岛的甲基化状态,初步探索HSP70基因在肌肉组织生长发育中的作用,试验以文昌鸡和北京油鸡为试验材料,采用MassArray质谱法检测鸡胸肌中HSP70基因启动子区CpG岛的甲...为了获得鸡热休克蛋白70(heat shock protein 70,HSP70)基因启动子区CpG岛的甲基化状态,初步探索HSP70基因在肌肉组织生长发育中的作用,试验以文昌鸡和北京油鸡为试验材料,采用MassArray质谱法检测鸡胸肌中HSP70基因启动子区CpG岛的甲基化水平,比较分析文昌鸡和北京油鸡HSP70基因的甲基化差异。结果表明:在HSP70基因启动子中共检测到65个CpG位点的甲基化水平;文昌鸡胸肌生长发育过程中有8个CpG位点甲基化水平发生明显改变,其甲基化密度从第30天到第120天基本呈下降趋势;北京油鸡胸肌生长发育过程中只有3个CpG位点甲基化水平发生明显改变,其甲基化密度从第30天到第120天基本呈升高趋势,第120天时甲基化水平达到最高。说明文昌鸡与北京油鸡HSP70基因启动子区CpG岛的甲基化模式和水平不同,这可能导致两种鸡对应激反应产生不同的耐受程度。展开更多
随着安徽电力事业的发展,电网逐步形成巨大的互联系统,短路电流水平日渐增大,因此对故障电流限制措施的研究具有十分重要的意义。文章研究了一种串联补偿型故障限流器(fault current limiter,FCL),采用脉冲宽度调制(pulse width modulat...随着安徽电力事业的发展,电网逐步形成巨大的互联系统,短路电流水平日渐增大,因此对故障电流限制措施的研究具有十分重要的意义。文章研究了一种串联补偿型故障限流器(fault current limiter,FCL),采用脉冲宽度调制(pulse width modulation,PWM)控制双向换流开关,减小因开关装置所引起的低次谐波。在合肥电网局部短路电流超标线路进行含FCL的计算分析,得出FCL在合肥电网中最优安装方案。在合肥电网肥西母线等值系统中对该故障限流器进行仿真分析,验证了该装置的限流作用。展开更多
目的探索非转移性前列腺癌根治术后发生第二原发癌(secondary primary malignancies,SPM)的危险因素。方法从监测、流行病学和最终结果(Surveillance,Epidemiology,and End Results,SEER)数据库筛选2010年-2015年诊断为T1-4N0M0的前列...目的探索非转移性前列腺癌根治术后发生第二原发癌(secondary primary malignancies,SPM)的危险因素。方法从监测、流行病学和最终结果(Surveillance,Epidemiology,and End Results,SEER)数据库筛选2010年-2015年诊断为T1-4N0M0的前列腺癌患者的临床资料。根据治疗方式分为单纯手术组、手术加放射治疗(以下简称放疗)组和手术加化学药物治疗(以下简称化疗)组,比较不同治疗方式下SPM的发生率及常见部位。结果本研究共纳入患者243094例,发生SPM者19344例(8.0%),发生SPM的中位时间为36个月。发生SPM最常见的前五个部位分别为肺和支气管、膀胱、皮肤、肾和肾盂、结直肠。Logistic回归分析显示,种族、年龄、化疗、放疗为SPM的独立影响因素。手术加化疗组SPM发生率(19.7%)显著高于单纯手术组(6.4%)和手术加放疗组(8.3%),差异有统计学意义,但3组SPM累及的系统差异无统计学意义,前四位均为消化系统、泌尿系统、免疫系统和呼吸系统。结论前列腺癌患者行手术加放疗和化疗的情况下,SPM发生率增加,尤其是手术加化疗组;不同治疗方案中SPM主要发生部位类似,放疗患者的SPM更容易出现在消化系统。对前列腺癌患者采用不同治疗方式后,除了警惕前列腺癌复发和转移外,还应关注SPM的发生。展开更多
Duck tembusu virus disease is one of the most serious infectious diseases endangering duck industry. A strain of virus was isolated from a dead duck,and performed PCR identification and sequence analysis. The results ...Duck tembusu virus disease is one of the most serious infectious diseases endangering duck industry. A strain of virus was isolated from a dead duck,and performed PCR identification and sequence analysis. The results showed that the sequence of the isolate shared above 99% homology with duck tembusu virus( DTMUV) sequence on Gen Bank. The result indicated that the isolated virus was DTMUV.展开更多
The paper was to explore the preventive effects of five drugs on mycoplasma pneumonia of swine （MPS） and to provide reference for clinical medication of pig farms in Hainan Province. A total of 444 health piglets we...The paper was to explore the preventive effects of five drugs on mycoplasma pneumonia of swine （MPS） and to provide reference for clinical medication of pig farms in Hainan Province. A total of 444 health piglets were randomly divided into 6 groups, including five medication groups （72 piglets in group A, 74 pig- lets in group B, 72 piglets in group C, 76 piglets in group D, 76 piglets in group E） and one control group （74 piglets）. The piglets in experimental groups were treated drugs once a day for successive 5 days at 30, 60, 90, 120 and 150 of age. The piglets in control group were free of medication. At 70 and 140 days of age, 15 piglets of each group were randomly selected to collect their blood sermn. The Mycoplasma hyopneumoniae （M-Hyo） antibodies in serum were measured by en- zyme-linked immunosorbent assay （ELISA）. During the experiment, the incidence rates of respiratory disease, lung lesion, feed conversion rate, average daily gain （ADG）, and mortality rate of pigs were also observed and recorded. The results showed that the five drugs had significant difference in preventative effects. Group C （Zhiyuanjing group） received the best preventive effect and the highest economic benefits. Compared with control group, the ADG and feed conversion rate in group C were increased by 7.53% and 9.09%, respectively; the incidence rate of respiratory disease was reduced by 13.44% and lung lesion was alleviated by 81.43% ; and the earnings of each pig could rise by 132.70 yuan. The preventative effect and economic benefit of the drugs was sequenced by Chansu Kechuanling and Bingchan Kechuanwang. Wante Feilin and amoxicillin had weaker preventive effects against MPS but greatly influenced growth performance of pigs, so they should be used alternatively with other drugs.展开更多
Porcine reproductive and respiratory syndrome( PRRS) is one of viral diseases with severe reproductive obstacle of pregnant sows and respiratory tract symptoms and higher mortality of piglets as characteristics,which ...Porcine reproductive and respiratory syndrome( PRRS) is one of viral diseases with severe reproductive obstacle of pregnant sows and respiratory tract symptoms and higher mortality of piglets as characteristics,which is caused by porcine reproductive and respiratory syndrome virus( PRRSV). PRRS has brought great threats to swine industry in the world. The advances of studies on the viral proteins of PRRSV were reviewed from the genome,non-structural proteins and structural proteins of PRRSV.展开更多
文摘为了获得鸡热休克蛋白70(heat shock protein 70,HSP70)基因启动子区CpG岛的甲基化状态,初步探索HSP70基因在肌肉组织生长发育中的作用,试验以文昌鸡和北京油鸡为试验材料,采用MassArray质谱法检测鸡胸肌中HSP70基因启动子区CpG岛的甲基化水平,比较分析文昌鸡和北京油鸡HSP70基因的甲基化差异。结果表明:在HSP70基因启动子中共检测到65个CpG位点的甲基化水平;文昌鸡胸肌生长发育过程中有8个CpG位点甲基化水平发生明显改变,其甲基化密度从第30天到第120天基本呈下降趋势;北京油鸡胸肌生长发育过程中只有3个CpG位点甲基化水平发生明显改变,其甲基化密度从第30天到第120天基本呈升高趋势,第120天时甲基化水平达到最高。说明文昌鸡与北京油鸡HSP70基因启动子区CpG岛的甲基化模式和水平不同,这可能导致两种鸡对应激反应产生不同的耐受程度。
文摘随着安徽电力事业的发展,电网逐步形成巨大的互联系统,短路电流水平日渐增大,因此对故障电流限制措施的研究具有十分重要的意义。文章研究了一种串联补偿型故障限流器(fault current limiter,FCL),采用脉冲宽度调制(pulse width modulation,PWM)控制双向换流开关,减小因开关装置所引起的低次谐波。在合肥电网局部短路电流超标线路进行含FCL的计算分析,得出FCL在合肥电网中最优安装方案。在合肥电网肥西母线等值系统中对该故障限流器进行仿真分析,验证了该装置的限流作用。
文摘目的探索非转移性前列腺癌根治术后发生第二原发癌(secondary primary malignancies,SPM)的危险因素。方法从监测、流行病学和最终结果(Surveillance,Epidemiology,and End Results,SEER)数据库筛选2010年-2015年诊断为T1-4N0M0的前列腺癌患者的临床资料。根据治疗方式分为单纯手术组、手术加放射治疗(以下简称放疗)组和手术加化学药物治疗(以下简称化疗)组,比较不同治疗方式下SPM的发生率及常见部位。结果本研究共纳入患者243094例,发生SPM者19344例(8.0%),发生SPM的中位时间为36个月。发生SPM最常见的前五个部位分别为肺和支气管、膀胱、皮肤、肾和肾盂、结直肠。Logistic回归分析显示,种族、年龄、化疗、放疗为SPM的独立影响因素。手术加化疗组SPM发生率(19.7%)显著高于单纯手术组(6.4%)和手术加放疗组(8.3%),差异有统计学意义,但3组SPM累及的系统差异无统计学意义,前四位均为消化系统、泌尿系统、免疫系统和呼吸系统。结论前列腺癌患者行手术加放疗和化疗的情况下,SPM发生率增加,尤其是手术加化疗组;不同治疗方案中SPM主要发生部位类似,放疗患者的SPM更容易出现在消化系统。对前列腺癌患者采用不同治疗方式后,除了警惕前列腺癌复发和转移外,还应关注SPM的发生。
基金Supported by National Natural Science Foundation of China(31402224)Key Research & Development Project of Hainan Province(ZDYF2017029)Agricultural Science and Technology Innovation Project of Hainan Academy of Agricultural Sciences(CXZX201413)
文摘Duck tembusu virus disease is one of the most serious infectious diseases endangering duck industry. A strain of virus was isolated from a dead duck,and performed PCR identification and sequence analysis. The results showed that the sequence of the isolate shared above 99% homology with duck tembusu virus( DTMUV) sequence on Gen Bank. The result indicated that the isolated virus was DTMUV.
基金National Natural Science Foundation of China(31560696)Special Project of Enterprises-Universities-Researches Integration of Hainan Province(cxy20150008)Special Project of Technology Development in Scientific Research Institutes of Hainan Province(KYYS-2014-32)
文摘The paper was to explore the preventive effects of five drugs on mycoplasma pneumonia of swine （MPS） and to provide reference for clinical medication of pig farms in Hainan Province. A total of 444 health piglets were randomly divided into 6 groups, including five medication groups （72 piglets in group A, 74 pig- lets in group B, 72 piglets in group C, 76 piglets in group D, 76 piglets in group E） and one control group （74 piglets）. The piglets in experimental groups were treated drugs once a day for successive 5 days at 30, 60, 90, 120 and 150 of age. The piglets in control group were free of medication. At 70 and 140 days of age, 15 piglets of each group were randomly selected to collect their blood sermn. The Mycoplasma hyopneumoniae （M-Hyo） antibodies in serum were measured by en- zyme-linked immunosorbent assay （ELISA）. During the experiment, the incidence rates of respiratory disease, lung lesion, feed conversion rate, average daily gain （ADG）, and mortality rate of pigs were also observed and recorded. The results showed that the five drugs had significant difference in preventative effects. Group C （Zhiyuanjing group） received the best preventive effect and the highest economic benefits. Compared with control group, the ADG and feed conversion rate in group C were increased by 7.53% and 9.09%, respectively; the incidence rate of respiratory disease was reduced by 13.44% and lung lesion was alleviated by 81.43% ; and the earnings of each pig could rise by 132.70 yuan. The preventative effect and economic benefit of the drugs was sequenced by Chansu Kechuanling and Bingchan Kechuanwang. Wante Feilin and amoxicillin had weaker preventive effects against MPS but greatly influenced growth performance of pigs, so they should be used alternatively with other drugs.
基金Supported by Program of National Natural Science Foundation of China(No.31272564)The Joint Fund of NSFC-Guangdong(U0931003)+1 种基金Special Program of Modern Agricultural Industry Technology System(CARS-36)Hainan Program of Scientific Operating Expenses(Qiong Cai Yu[2013]131)
文摘Porcine reproductive and respiratory syndrome( PRRS) is one of viral diseases with severe reproductive obstacle of pregnant sows and respiratory tract symptoms and higher mortality of piglets as characteristics,which is caused by porcine reproductive and respiratory syndrome virus( PRRSV). PRRS has brought great threats to swine industry in the world. The advances of studies on the viral proteins of PRRSV were reviewed from the genome,non-structural proteins and structural proteins of PRRSV.
