Nickel seminal concentrations in various animals and correlation to spermatozoa quality     

Zemanová J  Lukác N  Massányi P  Trandzík J  Burócziová M  Nad P  Capcarová M  Stawarz R  Skalická M  Toman R  Koréneková B  Jakabová D 《Journal of veterinary medicine. A, Physiology, pathology, clinical medicine》2007,54(6):281-286

In this study, the concentration of nickel in stallion, bull, ram, boar and fox semen, and its relation with spermatozoa quality was analyzed. The concentration of nickel in semen was 0.20 mg kg(-1) in stallion, 0.12 mg kg(-1) in bull, 0.31 mg kg(-1) in ram, 0.06 mg kg(-1) in boar and 0.36 mg kg(-1) in fox. Seminal nickel concentration was significantly higher (P < 0.05) in foxes than that in bulls and significantly higher (P < 0.01) in rams and foxes in comparison with boars. Evaluation of total pathological spermatozoa revealed the highest number in stallions followed by rams, bulls, boars and foxes. In bull, ram and boar semen, separated flagellum, flagellum torso and knob-twisted flagellum were predominant. Knob-twisted flagellum, separated flagellum and flagellum torso were found in increased number in stallion semen and broken flagellum in fox semen. Correlation analysis in bulls indicated a high positive correlation between seminal nickel and separated flagellum (r = 0.76) and medium positive correlation between nickel and flagellum torso (r = 0.62), and in rams a high positive correlation between nickel and separated flagellum (r = 0.77). Medium positive correlation was found between nickel and separated flagellum (r = 0.43) and between nickel and other pathological spermatozoa (r = 0.45) in boars.  相似文献   

新疆生产建设兵团节水灌溉工程分     

朱蓉  杨依群  杨文泽c 《中国农村水利水电》2007,(5):65-67

从地形、气候、作物种类、水源条件四个方面进行分析，对兵团的节水灌溉进行节水灌溉工程分区，将兵团的节水灌溉工程划分为六大区域，为各地、师（局）、团场探求一个相对科学合理的节水灌溉工程形式，并指出节水灌溉发展方向。  相似文献   

小型水电站机组综合自动化装置研     

刘宝忠  郑应霞c=h 《中国农村水利水电》2006,(7):119-121

针对目前国内小型水电站设备陈旧、技术落后、运行安全性差等实际情况，提出了一种集控制、保护、操作、通信于一体的综合自动控制装置方案。这种控制装置结构简洁、高可靠、易维护，有效地提高电站运行效率，确保安全，减少运行维护成本，实现了小水电站“无人值班”和“信息化管理”。该控制装置的问世将改变我国小水电现有运行现状,对提高电厂的经济运行具有特别重要的意义，有利于推动我国农村小水电的自动化水平。  相似文献   

韶关市区饮用地表水源地水质分析     

梁瑞英  黄小兰c 《中国农村水利水电》2006,(10):38-39

采用GB38388-2002作为评价标准和实测资料,对韶关市区主要地表达饮用水源地水质的年平均值随年份变化趋势进行分析,较为全面地阐述了水质现状,变化趋势及成因,得出水源地未达到2类保护目标和砷已对水源地构成安全隐患的结论.提出保护好水源地的一些建议,为当地政府决策部门的决策提供依据,同时也让更多的市民从中了解当地水源地的情况,提高市民对保护用水源地重要性的认识,达成人人参与共同保护的共识.  相似文献   

超长引水隧洞水电站大波动过渡过     

付亮杨建东  王建伟c 《中国农村水利水电》2006,(9):112-114

通过数值计算的方法，以锦屏二级水电站为例分析了超长引水隧洞水电站在大波动过渡过程方面的特点。计算结果表明:超长引水隧洞水电站由于调压室波动周期长、衰减慢、振幅大，因此一般情况下其上游管线最大、最小压力分布均受到上游调压室最高、最低涌浪的控制；同时对于该类水电站来说需要考虑波动叠加所带来的不利影响。  相似文献   

Natural infection with two genotypes of Cryptosporidium in red squirrels (Sciurus vulgaris) in Italy     

Kvác M  Hofmannová L  Bertolino S  Wauters L  Tosi G  Modrý D 《Folia parasitologica》2008,55(2):95-99

We investigated the genotypes of Cryptosporidium infecting red squirrels (Sciurus vulgaris L.) in two areas of the Western Alps in Italy. Examination of 141 faecal samples from 70 red squirrels revealed oocysts of Cryptosporidium in 17 animals (24.3%). Based on 18S rRNA gene sequencing, two genotypes of Cryptosporidium species were found: 15 squirrels were positive for the Cryptosporidium ferret genotype and 2 for the Cryptosporidium chipmunk genotype I. The occurrence and intensity of Cryptosporidium infection did not differ between the study areas or sex. More than 85% of the positive animals were adults; however no difference was found between Cryptosporidium infection in the juvenile and adult age groups. Oocysts of the Cryptosporidium ferret genotype measured 5.5 +/- 0.3 x 5.2 +/- 0.2 microm (shape index 1.06) and the Cryptosporidium chipmunk genotype I 5.8 +/- 0.3 x 5.4 +/- 0.3 microm (shape index 1.07). Neonatal and adult CD1 and BABL/c mice inoculated with 1 x 10(3) fresh oocysts of both genotypes did not produce detectable infection.  相似文献   

一株药用植物根际放线菌的分离鉴定及其生物活性初探     

袁丽杰  朱丽华  张玉琴  余利岩  张月琴 《安徽农业科学》2011,39(30):18424-18427,18462

[目的]对来源于药用植物根际的一株放线菌进行鉴定。[方法]采用从表型、基因型、系统发育3个层次进行的多项分类研究方法,对菌株发酵液进行生物活性检测。[结果]菌株发酵产物具有抗金黄色葡萄球菌及白介素-1β转移酶抑制活性。菌株形态特征、生理生化特性、化学分类特征、分子分类特征均符合Catenulispora属的特征。[结论]放线菌I06-01088属于Catenulispora属的一个菌株。  相似文献   

小清河干流济南城区段主河槽河岸     

窦实  曹升乐  王好芳c 《中国农村水利水电》2008,(3):112-114

以具体工程小清河济南城区段为例,研究水库型河道在确定主河槽河岸设计高程应考虑的影响因素。提出对于既有景观功能又有防洪要求的河道,主河槽河岸设计高程应分汛期与非汛期进行考虑,综合防洪要求及景观效果确定所需高程。  相似文献   

DNMT1表达与乳腺癌临床预后相关性研究     

梁松鹤  杨昕光  高春艳  袁丽杰  张萍  王麟 《黑龙江八一农垦大学学报》2019,31(4)

为分析原发性乳腺癌中DNA甲基转移酶1(DNA methyltransferase 1, DNMT1)表达水平与临床预后的相关性。收集97例临床资料完整的乳腺癌手术切除标本,采用免疫组化SP法检测DNMT1、ERα、PR、HER-2、P53、ki-67在乳腺癌中的表达,将DNMT1表达水平与临床病理参数及随访生存状况进行相关性分析。结果发现:原发性乳腺癌组织中,DNMT1表达水平与Ki-67呈正相关,与其他临床病理参数未见相关性;低临床分期组、无淋巴结转移组、ER阳性组、DNMT1低表达组的5年总生存率和无病生存率均显著高于相应对照组,Ki-67低表达组仅5年总生存率高于相应对照组,HER-2阴性组仅5年无病生存率高于相应对照组;Cox风险比例模型分析显示:只有临床分期和DNMT1表达水平是影响总生存期(Overall survival, OS)和无病生存期(Disease free survival, DFS)的独立风险因素。表明原发性乳腺癌中DNMT1表达水平与肿瘤细胞恶性表型及患者生存时间有关,可能成为判断乳腺癌预后的一个重要指标。  相似文献   

The effect of Rhizobium spp. inoculation on seed quality of bean in Turkey     

Kücük C  Kivanç M 《Pakistan journal of biological sciences: PJBS》2008,11(14):1856-1859

Rhizobium spp. (local isolate) was used to inoculate three bean (Phaseolus vulgaris L.) varieties; Akman 98, G?ynük 98 and Sehirali 90, in a factorial field experiment. The objective of the experiment was to study effect of inoculation on seed yield, protein range, seed weight, non-soaker capacity and hydration index. Rhizobium spp. inoculation and nitrogen fertilizer significantly increased characters tested. This study revealed that inoculation with Rhizobium spp. improved seed quality.  相似文献