四品种黄牛正常牛体细胞染色体畸变分析   总被引：4，自引：0，他引：4  

陈宏  邱怀 《中国牛业科学》1994,20(4):1-2,38

通过淋巴细胞培养对４个黄牛品种共６３头正常牛体细胞染色体的畸变类型和频率进行了观察统计分析。结果表明，蒙古牛，岭南牛和西镇年多倍体细胞出现率分别为４．１２％，４．５７％和５．２１％，平均为４．８７％。多倍体包括三倍体，四倍体和六倍体。结构变异有缺失，染色单体裂隙，染色单体断裂，染色体间隙，染色体断裂和断片几种类型。蒙古牛，秦川牛，岭南牛和西镇牛总的结构变异率分别为２．８７％，２．６５％，１．９４和  相似文献   

原发性纵隔肿瘤及囊肿71例分析(附1例罕见胸腺瘤并发症)     

胡新荣  邹世海  黄书伟  董瀚基 《湛江医学院学报》1992,(3)

71例原发于纵隔的肿瘤及囊肿,其中胸腺瘤占35.2％,畸胎瘤占23.9％,神经源性肿瘤占18.2％,其他肿瘤占22.7％。三类常见肿瘤中,以胸腺瘤恶性率最高(32％),神经源性肿瘤次之(15.4％),畸胎瘤无1例恶性。术前正确诊断25例,未能分类25例,误诊21例。本文分析了误诊原因。此外,报道1例罕见的胸腺瘤并发症。  相似文献   

空中核爆炸对水稻的损伤及其恢复     

赵文虎  裘同才 《作物学报》1992,18(1):23-30

在空中核爆炸的情况下,光辐射是损毁水稻的主要因素,光辐射可使三叶期、分蘖期水稻的叶片烧损、株高降低,其损毁程度随着距爆心距离的加大而减弱,叶片受到烧损仍然存活的植株,爆后可迅速恢复生长,叶片数、株高在较短时间内即可达对照水平,分蘖能力也不受影响。收获时大部分受损水稻的穗长、穗粒数、千粒重、平均单株分蘖数、  相似文献   

汽车运材费用的多因素分析   总被引：1，自引：1，他引：0  

邱荣祖  张世添 《福建林学院学报》1994,14(3):243-246

本文应用多元统计分析方法对汽车运材费用进行分析，影响运材费用的主要因素按其对单位成本影响的贡献大小排序，依次是单位养路费、单位燃润费、单位保修费和单位大修费．  相似文献   

华夏慈姑种质资源及其研究(上)   总被引：2，自引：0，他引：2  

黄新芳  孔庆东  柯卫东  彭静  王海洋 《长江蔬菜》1998,(11)

介绍了华夏慈姑种质资源的分布、植物学和园艺学分类、生物学特性及生长规律、营养成分，对华夏慈姑的细胞生物学、植物学、栽培学以及病虫害防治等方面的研究进展作了概述，提出了华夏慈姑种质资源研究的基本思路。  相似文献   

畜产品中氯霉素的放射免疫测定   总被引：2，自引：0，他引：2  

黄世乐  陈祖义 《南京农业大学学报》1991,14(3):109-113

本文将氯霉素与牛血清白蛋白连接成复合物,制得特异性强、亲和力高的兔抗氯霉素抗血清,建立氯霉素的放射免疫测定法。其最小检测量为20pg/管,可测范围为50～3200pg,回收率为95.5％±8.7％,批内和批间变异系数分别为4.1％和8.9％。样品制备简单,整个测定可在10h内完成。  相似文献   

Investigation of Cervical Patency and Uterine Appearance in Domestic Cats by Fluoroscopy and Scintigraphy     

K Chatdarong  N Kampa  E Axnr  C Linde‐Forsberg 《Reproduction in domestic animals》2002,37(5):275-281

The cervical patency of six domestic female cats was monitored under sedation by infusion of contrast medium (Omnipaque) into the cranial vagina during early oestrus, mid‐oestrus, late oestrus and interoestrus or a radiopharmaceutical (^99mTc‐HSA) during mid‐ and interoestrus in a non‐ovulatory oestrous cycle. The transport of the contrast medium or the radiopharmaceutical through the cervix and within the uterine horns was observed under fluoroscopy and with the aid of scintigraphy. In three of the queens, transcervical transport of contrast medium was demonstrated in all stages of oestrus, in one queen during mid‐oestrus, late oestrus and 1 day after oestrus, and in two queens only during late oestrus. The relations between the cervical patency to the contrast medium and the oestrous behaviour, cornification of the vaginal cells and the serum oestradiol‐17β concentration were evaluated, and a relationship was found between the cervical patency and the degree of vaginal cornification. Transcervical transport of the radiopharmaceutical was observed in three queens during mid‐oestrus. When the cervix was open, hysterography under a fluoroscope and hysteroscintigraphy were performed. The fluoroscopic and scintigraphic recordings revealed the patterns of the uterine contractions during oestrus in both ascending and descending directions, and the movement of the uterine contents back and forth between the uterine horns. The hysterograms were classified according to the shape of the uterine horns and the appearance of the endometrial lining. Spiral‐shaped uterine horns with a smooth inner contour were observed in two queens, and a corkscrew appearance with irregular filling defects in the uterine lumen was shown in two queens that had developed subclinical cystic endometrial hyperplasia. These findings demonstrated that fluids or particles deposited in the cranial vagina of the cat can be transported into the uterus during some stages of the oestrous cycle. The fluoroscopic and scintigraphic techniques developed in this study may be further modified to permit more detailed studies of uterine contractile patterns and sperm transport in the feline female reproductive tract. Hysterography proved useful to diagnose uterine disease. The information on cervical patency is of value also for the development of techniques for artificial insemination in this species, and should be studied also in the ovulatory cycle.  相似文献   

鸵鸟传染性喉气管炎病毒的分离鉴定   总被引：2，自引：0，他引：2  

曾元根  刘振湘  唐晓玲 《中国家禽》2001,23(24):11-12

经临床症状、病理变化观察、琼脂扩散试验、病毒分离以及人工接种试验确诊为鸵鸟传染性喉气管炎。并通过自制组织灭活菌，紧急预防接种等综合防制措施控制了疫情。  相似文献   

极具开发价值的百合产品     

黄力 《中国果菜》2005,(3):37-37

百合精粉的制作可以采用自然干燥后，粉碎、旋风分离而制成，但该产品色泽焦黄，脱离了百合原有本色；如果采用鲜百合打浆，均质后喷雾干燥的方法，产品色白偏黄，保持了百合的原色，且粒度较细，保持了百合原有的营养成分。百合粉可以直接饮用，做成纯天然保健饮品；可以将百合精粉掺在面粉里，制成各类精美的百合面包、饼干、面条及其他各式糕点；用于制作高档百合软糖、淀粉糖糖果、果冻等等，用途广泛。  相似文献   

不同条件下蒙古冰草种子产量及产量构成因子的分析     

海棠  韩国栋 《内蒙古农业大学学报(自然科学版)》2004,25(1):109-113

在西苏旗对蒙古冰草的种子产量及产量构成因子进行了分析得出结果为冰草的实际种子产量与潜在种子产量差别很大，蒙古冰草种子产量的主要限制因子为抽穗率和结实率。  相似文献