华南乡土树种在松杉林下生长及林下植物多样性研究

研究了11种华南乡土阔叶树种幼树在广东增城市林科所松杉人工林林下的生长表现,结果表明:4种壳斗科植物黎蒴、米锥、甜锥和槟榔青冈在移植后5 a均具有较高的树高和冠幅生长量,可作为人工林改造优良树种;香椿在前期生长表现良好,而移植后45 a生长速度有所下降,反映该树种随着年龄增长,其需光性加强,该树种仅适用于低密度人工林的改造;石笔木生长虽然稍慢,但其耐荫性较强,在林下生长良好,可作为次生林改造树种;樟树、枫香和火力楠等树种在林下生长不良.样方调查结果表明:松杉林下植物以耐荫性和鸟播植物为主.     

中国美利奴羊育种信息管理系统开发

以提高育种资料管理和利用效率为目的,提出基于Visual FoxPro6.0软件开发中国美利奴羊育种信息管理系统的设计思路,阐述了系统的结构和所具备的基本功能.     

青海不同产区大黄的X-射线衍射图谱研究（摘要）

[目的]为区分不同产地大黄药材的质量及鉴别提供依据。[方法]将供试材料青海玉树掌叶大黄（样品1）、青海海南唐古特大黄（样品2）与青海果洛唐古特大黄（样品3）分别粉碎成粉末,过100目筛,即可供X射线衍射试验用。设定管压30 kV,管流20 mA,2θ扫描范围3°～90°,扫描速度0.06°/s,每种样时间0.5 s,获得3种不同产区大黄的X-射线衍射图谱。试验数据以晶面间距d与特征峰相对强度L/Io表示,记为d/（I/Io）。将试验数据导入中药指纹图谱相似度计算软件,经选峰,设定匹配模板,将谱峰自动匹配,然后设定标准模板,进行谱峰差异性评价和整体相似性评价。[结果]样品1中所含的化学成分与样品2相同,但峰的强度（I/Io）不同,表明相同成分在两种样品中的含量不相等。同样把样品3的图谱与其他两个样品进行比较,也会得到相同的衍射峰值。表明不同产区的大黄中各化学成分的含量有差异,但其衍射图谱及衍射峰值具有一定的指纹特征。[结论]X-射线衍射法是鉴别不同产区的大黄及其他中药材的一种快捷有效的方法。     

Multiple ventricular bands and the associated trabecula septomarginalis dextra in the right ventricle of the domestic dog (Canis familiaris)

Ventricular bands are strand‐like intraventricular structures extending between adjacent papillary muscles; a papillary muscle and the ventricular wall or the interventricular septum and ventricular wall. Examination of the domestic dog right ventricle documented six ventricular band types. Eighty‐five of the 89 examined hearts had at least one right ventricular band. In the current study, the right ventricle of the 85 dog hearts was re‐examined for more than one ventricular band type. Seven patterns of multiple different bands were identified in the 24 dog hearts. The patterns (i.e., combinations) of different ventricular bands were grouped into three categories. Category 1 had five different patterns of bands. Each pattern had two different band types. Category 2 had one combination of three different bands. Category 3 had one combination of four different bands. The presence of right ventricular bands around the trabecula septomarginalis dextra was also documented. All 24 dog hearts with multiple ventricular bands had a trabecula septomarginalis dextra. The main goal of this study was documentation of multiple right ventricular band patterns. A secondary goal was documentation of the combined presence of these bands and a trabecula septomarginalis dextra. In the dog, the ventricular bands and trabecula are both thin, strand‐like intraventricular structures with variable branching patterns before blending into the ventricular wall. The gross similarity of these structures and lack of information on their combined presence could precipitate their misidentification.     

17种报春苣苔属植物的组培苗移栽季节研究

探讨不同季节对报春苣苔属植物组培苗移栽成活的影响,为其今后组培苗工厂化、规模化生产提供技术支持。以17种报春苣台属植物的组培生根苗为材料,研究季节对移栽成活的影响,分析不同物种间在同一季节的移栽成活差异以及同一物种在4个不同季节的移栽成活差异。大部分种类在春季移栽具有较高的成活率;成活率最高与最低的种类为三苞报春苣苔和粗茎报春苣苔,成活率分别为100.0%、51.3%;适宜春季移栽的种类是：贵港报春苣苔、硬叶报春苣苔、永福报春苣苔、紫花报春苣苔、三苞报春苣苔、阳朔小花苣苔、褐纹报春苣苔、柳江报春苣苔、尖萼报春苣苔、大根报春苣苔。17个种类在夏季移栽具有较低的成活率;成活率最高与最低的种类为大根报春苣苔和漓江报春苣苔,成活率分别为68.7%、15.3%。在17个种类中,超过一半的种类在秋季、冬季移栽具有较高的成活率。秋季移栽成活率最高为桂海报春苣苔、那坡报春苣苔,均为100.0%,成活率最低为褐纹报春苣苔,为20.0%;适宜秋季移栽的种类是：桂海报春苣苔、粗茎报春苣苔、那坡报春苣苔。冬季移栽以冬花报春苣苔的成活率最高,为100.0%,永福报春苣苔的成活率最低,为32.7%;适宜冬季移栽的种类是：桂中报春苣苔、紫萼报春苣苔、冬花报春苣苔、漓江报春苣苔。17个种类的移栽季节以春季的最好,夏季最差,秋季和冬季介于春季和夏季之间。不同季节不同种类移栽成活率不同,不同种类其适宜移栽的季节不同,应根据季节移栽合适的种类以保证其获得较高的成活率。     

Comparison of media used for the primary isolation of Mycobacteriurm bovis by veterinary and medical diagnostic laboratories

Veterinary and medical laboratories engaged in the cultural diagnosis of bovine or human tuberculosis were requested to supply samples of the media that they routinely use for the primary isolation of M. bovis. Fourteen laboratories supplied 7 basic media types; these were Lowenstein-Jensen, Stonebrink's, modified Middlebrook 7H11 agar, tuberculosis bovine blood agar, egg yolk agar, Gerloff's egg and Herrold's egg yolk. Two strains of M. bovis were used to test the media, strain AN5, a glycerol-tolerant laboratory strain and M86/90 a glycerol-sensitive wildtype strain. AN5 grew well on all media with the exception of Herrold's and strain M86/90 did not grow on media containing glycerol and grew poorly on Herrold's medium. It is recommended that Lowenstein-Jensen with pyruvate (but without glycerol), Stonebrink's, modified Middlebrook 7H11 and tuberculosis bovine blood agar should be considered the media of choice for the primary isolation of M. bovis. Egg yolk agar also proved adequate for this purpose in the trial. This medium may be suitable for routine use but to date experience with its use is limited.