四品种黄牛正常牛体细胞染色体畸变分析

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     

23种广东常见阔叶树材的耐磨性质

本文报导23种广东常见阔叶树材的耐磨性试验结果,并对耐磨性与木材密度、硬度的关系及木材耐磨性各向异性问题作了讨论。     

水飞蓟对动物机体免疫功能的影响研究

将小鼠分为四组，分别饲喂１０％水飞蓟、２０％水飞蓟、环磷酰胺（０．０１ｇ／ｋｇ）和空白对照（常规饲料），研究对小鼠免疫功能的影响。实验结果证明，水飞蓟各剂量组能增高小鼠外周血白细胞数目（Ｐ＜０．０１、０．００１）；提高小鼠腹腔巨噬细胞的吞噬率（Ｐ＜０．００１，０．００１）及吞噬指数（Ｐ＜０．０５、０．００１）并随剂量加大有增强的趋势；能促进小鼠淋巴细胞转化，提高淋巴细胞转化百分率（Ｐ＜０．０１、０     

中国黄牛（OX）前肢脚部动脉的研究

对２４例成黄牛的前肢脚部动脉采用解剖，铸型和动脉造影等方法进行研究。结果：１。中国黄牛前脚部掌侧动脉主干为正中动脉，指掌侧第Ⅱ总动脉，在近指节骨远端指掌侧第Ⅲ总动脉分为第Ⅲ，Ⅳ指掌侧固有轴动脉，经远指节骨轴孔入骨质管。２．指掌侧第Ⅲ总动脉在掌骨远端分出拽第Ⅱ总动脉，在近指节骨远端指掌侧第Ⅲ总动脉，分出背侧支和掌侧支，后者分别与指掌侧第Ⅱ，Ⅳ总动脉吻合形居近指节深弓，在掌侧支稍下方，指掌侧第２，Ⅳ指     

貂,貉,犬多种免疫球蛋白的研究与应用

利用犬温热，细小病毒性肠炎，犬传染性肝炎，狂犬病等弱毒株，以香菇多糖和动物的核糖，多肽做为免疫增强剂，对异源动物羊，猪，犊牛，家兔进行了免疫应答，筛选出了猪做为异源免疫动物。在免疫增强剂的参与下，完成了多次免疫应答，达到了理想的免疫球蛋白（ＩｇＧ），通过试验摸清了该制剂的免疫程序，确定了生产工艺，经重复性试验，稳定性试验及含量测定，以及临床应用试验和现志应用试验均达以了预期效果，该制剂经冷冻干燥后     

金针菇品种比较试验

１９９１年１０月至１９９３年７月，笔者用Ｃｏ－２７等１２个菌株做了四批十二次金针菇品种比较试验，菌株Ｃｏ－２７比优良品种三明一号，Ｆ９０８分别增产１４．２６％和１２．３９％，差异显著性测验表明，它们之间的差异均达到了显著程度；Ｃｏ－２６，Ｃｏ－１４，Ｃｏ－２３，Ｃｏ－１５，Ｃｏ－２４，Ｃｏ－１３等菌株与两个对照品种相比，其产量都有不同程度的提高，除Ｃｏ－２５之外，各菌株之间菌丝生长速度没有表现出显     

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

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.     

影响奶牛初乳产量的因素探讨

奶牛初乳是指母牛分娩后7天内所分泌的乳汁。初乳中不仅含丰富的营养物质，而且含有大量的免疫因子，因此具有促进生长发育、改善胃肠道功能、增进免疫调节、延缓衰老、抵御疾病等作用，是人类功能性保健食品的重要基料。初乳及其制品被誉为天然、完美、完全、廉价的“21世纪保健食品”。我国有奶牛和改良牛426.5万头(1998)，初乳资源十分丰富，但迄今对初乳产量及其影响因素尚未见有报道，于是对此问题我们在新疆乌鲁木齐五一奶牛场进行了初步探讨。1材料收集整理原始产奶记录和产犊记录取自该场1965年至1997年资料，全都为舍饲中国荷斯坦…