岳阳市城区藤本植物的应用现状

藤本植物的应用是增加城市绿化面积的有效措施,文章对岳阳市城区藤本植物的应用现状进行调查分析,举例介绍了应用中存在的问题并提出建议,以期在城市绿化中更科学地应用藤本植物.     

淫羊藿对肾阳虚雄性大鼠肾脏BMP-7表达的影响

目的 观察淫羊藿对肾阳虚雄性SD大鼠肾脏骨形态发生蛋白-7(BMP-7)表达的影响.方法 3月龄雄性SD大鼠24只,随机分为正常组、肾阳虚模型组、淫羊藿组,灌胃给药90d后,RT-PCR检测肾脏BMP-7 mRNA表达,免疫组化检测肾脏BMP-7的表达.结果 正常组和淫羊藿组BMP-7mRNA和蛋白显著高于肾阳虚模型组(灰度比值:0.990±0.103和1.054:t:0.097vs0.619±0.106,P＜0.01;免疫组化:0、1、0、4和0、0、0、4vs1、2、2、0,P＜0.01).结论 淫羊藿可提高肾脏中BMP-7的表达而保护肾脏.     

芒果去皮机的设计及其控制研究

芒果的外皮比较厚硬,富含纤维素,通常在加工前都必须去皮。与其它水果一样,由于芒果的品种不同,形状不同,成熟度不同,则去皮的难易程度就不同,不同的去皮方法所去皮层上的带肉率也不同。目前,芒果去皮的机械化程度较低,为提高芒果去皮的机械化程度及效率,介绍了一种新型的芒果去皮方法,对基于液压系统对芒果去皮过程的运动及控制进行了研究。     

西藏马铃薯育种现状、存在问题及发展方向

马铃薯是我区仅次于青稞、小麦、油菜之后的第四大作物，近年来，我区马铃薯生产发展迅速，种植面积逐年增加，各类马铃薯生产加工企业不断兴起。与此同时，生产中品种用途单一，专用品种缺乏的矛盾也逐步显露，这些都对我区马铃薯育种工作提出新的要求。     

水稻白叶枯病抗性杂种优势

 本试验采用双列式杂交方法,观察了以IR₂₆、IR₃₆等为代表的抗性品种的杂交优势。结果表明:杂交组合F₁代在分蘖末期抗性无优势,穗期抗性优势明显;F₂代两期鉴定正负向均有优势;F₁和F₂代均表现出正负向完全显性,部份显性,少数组合无显性。其中大都属于部份显性。优势指数分析也证明,对抗性亲本,优势指数d ≥ 1;对感病亲本,优势指数d<1。抗感品种杂交,其子代的抗性一般界于双亲值之间。这种优势可依亲本的抗性进行预测。     

有机硒对种公牛精子活力、免疫力和血液生化指标的影响

试验选用5头成年种公牛作试验牛，采用分期试验，试验前期饲喂基础日粮，试验中期和后期添加一定量的有机硒，试验期采集种公牛的精液进行精子活力的检测，并分别采取血样进行血常规检测和免疫球蛋白G（IgG）的测定.试验结果表明：在种公牛日粮中添加一定量的有机硒能显著提高种公牛的精子活力和免疫力（P〈0.05），但对血常规主要指标无显著的影响。     

Effects of antibiotic treatment on the inflammatory mediator expression in peritoneum and the peritoneal transport function in the rat with acute bacterial peritonitis

AIM: To observe the effect of antibiotic treatment on the inflammatory mediator expression in peritoneum and the peritoneal transport function in rats with acute peritonitis, and explore its mechanisms. METHODS: Eighty-six SD rats were randomly divided into three groups. Control group (n=28) were treated with PBS (ip), peritonitis group (n=28) and treatment group (n=28) were challenged with the E.coli (ip), but at 3 h and 9 h gentamicin was given (ip) in treatment group. Seven rats of every group were randomly sacrificed at 24 h, 48 h, 72 h and 7 d. Peritoneal equilibration test (PET) was did before they were killed. Leukocyte count, pathological changes and the expression of CD45, NF-κB， IL-1β， TNF-α in peritoneum were examined. RESULTS: (1)The blood leukocytes in peritonitis group decreased strikingly, but did not change obviously in other two groups. The peritoneal fluid leukocytes in peritonitis group increased significantly from 24 h to 72 h, while in treatment group, it enhanced more strikingly than peritonitis group at 24 h, and recovered earlier. (2) Both in peritonitis group and treatment group, the expression of activated NF-κB, IL-1β, TNF-α and CD45 increased significantly, but the treatment group was lower than model group at 48 h and 72 h. The mRNA level of IL-1β and TNF-α had the same trend as their protein expression. (3) Compared with the control group, UF and D/D0 Glu decreased significantly in model group and treatment group, and D/PTP increased dramatically. The D/P TP in treatment group lowered obviously compared with peritonitis group, while the net UF and D/D0 Glu had not significant difference between treatment group and model group. CONCLUSION: Antibiotic treatment can partly decrease the expression of inflammatory mediators in peritoneum of rats with acute peritonitis and also can improve the protein transport ability to some extent, but can not improve the peritoneal ultrafiltration and the glucose transport function.     

1999年四川省小麦条锈病大流行原因分析及治理对策

11999年小麦条锈病流行特点　　1)见病早，侵染时间长。秋苗上病害始见期早于常年，一般提早10d到3个月。　　2)扩散蔓延速度快。1月4日统计全省发病面积为3.0万hm2，到1月底即发展到6.7万hm2。3月3日达16.7万hm2，3月底增至38万hm2，4月23日为58.5万hm2。其扩散蔓延速度之快实属历史罕见。　　3)病害垂直扩散迅速，病情严重。乐至县3月初调查，病田率为64.3％，病株率平均11.9％，病叶率平均3.85％，分别较1周前上升2.0倍、20.0倍、24.7倍。3月23日调查，病株率又上升1.6倍，病叶率上升3.6倍，平均严重程度达21.8％。　　4)流行区域大，所…     

美国优良牧草引种及其利用初探

本文论述从美国俄勒岗淋巴恩布莱格公司引进３６个优良牧草品种，并在福建省上杭县试种筛选的过程。探索在本地区栽培管理这批优良牧草技术及预测在我国南方利用发展前景。