不同因子对夜蛾黑卵蜂子代性比的影响

目的:探索夜蛾黑卵蜂(Telenomus remus Nixon)雌蜂的最佳饲养方案,以期提高夜蛾黑卵蜂规模化扩繁效率,为草地贪夜蛾的生物防治和田间应用提供科学依据。方法:通过设置不同因子处理(寄生蜂交配、龄期、密度、营养、寄主密度和卵龄)测定对夜蛾黑卵蜂子代性比的影响。结果:寄生蜂交配与否直接影响其子代性比;子代雌蜂率随寄生蜂日龄增加逐渐降低,1日龄夜蛾黑卵蜂寄生后子代雌蜂率为79.05%;子代雌蜂率随寄生蜂密度增大而降低,而羽化率随寄生蜂密度增大而升高;饲喂不同浓度蜂蜜水对子代雌蜂率无明显影响;随着寄主卵粒数增加,寄生率和羽化率都呈现先升后降的趋势,当卵粒数为50时,子代雌蜂率最高达86.82%;寄主卵粒龄期为12 h时,子代雌蜂率最高,但寄主卵粒龄期为24 h时,羽化率显著高于其他处理组,为92.74%。结论:推荐1日龄寄生蜂2头寄生100粒24 h寄主卵,饲喂15%蜂蜜水,可在夜蛾黑卵蜂人工扩繁种群中获得更高比例的雌蜂。该研究结果为夜蛾黑卵蜂的规模化扩繁和应用提供技术支撑。

高血压病258例临床观察

我们运用中西医结合的方法,对高血压病的治疗进行临床研究,现报告如下. 临床资料 1、诊断标准:按1978年世界卫生组织建议使用的高血压病诊断标准:收缩压160mmHg(21.4kPa)或以上;舒张压95mmHg(12.6kPa).并有心、脏、肾等症状. 2、年龄与性别:45岁～65岁.男性146例,女性112例,共258例.病史均在3年以上.有吸烟史者76人;有饮酒史者120人;同时有吸烟和饮酒史者196人.喜咸食者224例.

100例青少年脑萎缩的临床研究

有关青少年脑萎缩的病因、诊断及治疗,国内外尚未见系统报道。笔者自1988年10月至1991年11月收集100例有临床症状并经头部CT证实的青少年脑萎缩,就其病因、诊断、防治及预后进行探讨: 一、诊断标准:(1)影像学诊断,依据吴恩惠所著《头部CT诊断学》所列标准;(2)临床:(A)既往健康,逐渐出现进行性加重的智力、生活、学习能力下降;(B)

Facile synthesis of 3D nanoporous Pd/Co_2O_3 composites with enhanced catalytic performance for methanol oxidation

To simultaneously reduce noble metal Pd usage and enhance electrocatalytic performance for methanol oxidation,Pd/Co2O3 composites with ultrafine three-dimensional(3D)nanoporous structures were designed and synthesized by simple one-step dealloying of a melt-spun Al-Pd-Co alloy with an alkaline solution.Their electrocatalytic activity in alkaline media was determined by a Versa-STAT MC workstation.The results indicate that the typical sizes of the ligaments and pores of the composites were approximately 8-9 nm.The Co2O3 was uniformly distributed on the Pd ligament surface.Among the as-prepared samples,the nanoporous Pd/Co2O3 composite generated from dealloying of the Al84.5Pd15Co0.5 alloy had the best electrocatalytic activity,and its activity was enhanced by approximately 230%compared with the nanoporous Pd from dealloying of Al85Pd15.The improvement of the electrocatalytic performance was mainly attributed to the electronic modification effect between Pd and Co as well as the bifunctional mechanism between Pd and Co2O3.

家族性成人型异染性脑白质营养不良

目的探讨家族性成人型异染性脑白质营养不良（ＭＬＤ）的临床特点及遗传方式。方法报告３例成人型ＭＬＤ具有家族性、遗传性特点的患者，并采用甲苯胺蓝染色进行腓肠神经活检，结果发现患者与散发的ＭＬＤ患者，无论从发病年龄还是临床表现来看基本相同，均为成年后起病，表现为进行性痴呆，反应差，计算力下降，理解力减退，言语含糊不清，锥体束征阳性，肢体运动功能下降。活检可见周围神经雪旺氏细胞浆内异染物质沉积，并见典型硫脂包涵体。结论从家族系谱分析，本病为常染色体隐性遗传。