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仔犬通常是指从出生至45日龄的犬,这一阶段,仔犬刚刚从母体中娩出,周围环境发生了很大的变化,生活能力差,抵抗能力低,各系统器官,特别是 相似文献
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Tolga Guvenc Mustafa Yavuz Gulbahar Murat Yarim Yonca Betil Kabak Onder Karayigit Mahmut Sozmen 《Journal of veterinary science (Suw?n-si, Korea)》2012,13(1):39-42
The aim of this study was to evaluate prognostic and/or diagnostic factors of canine mammary tumors by immunohistochemically analyzing the expression of alpha basic crystallin (αB-c). For this, formalin-fixed, paraffin-embedded blocks of 51 naturally-occurring canine mammary tumors (11 benign and 40 malignant) were used. Tissue from eight normal canine mammary glands were served as a control. Immunohistochemically, in the control mammary tissues, a few luminal epithelial cells were αB-c positive but myoepithelial cells were negative. In benign or simple type malignant tumors, αB-c expression was observed in luminal epithelial cells while the myoepithelial basal cells were negative. In benign or complex type malign tumors, positive staining was predominantly found in the cytoplasm of epithelial cells. Immunoreactivity of αB-c was also observed in neoplastic myoepithelial cells. Statistically, the number of cells immunolabeled with αB-c was found to be significantly different among tissues from normal canine mammary glands, benign lesions, and malignant tumors (p < 0.05). αB-c immunoreactivity was higher in malignant tumors than the control mammary tissues (p < 0.001). Data obtained in the current study revealed a strong association between high expression levels of αB-c and primary mammary gland tumors in canines. 相似文献
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衔取科目的训练是整个训练的关键,也是培养犬依恋性的体现。衔取这一科目在实际应用中使用的范围很广,它可为以后训练、鉴别、追踪、搜索、扑咬等科目打下良好的基础。 相似文献
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火圈制作:需长度为150cm×50cm×20cm木板一块。做法为如图所示:这样做火圈,移动比较方便,中间的横杆可以搭木板。一般的训练方法是把火圈的高度从低到高进行调整,而我们的训练方法是“木板步步降低法”。训练方法如下:第一步将木板放置(1)号位置,如图所示:牵犬走上木板,犬第一 相似文献
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一、夏季影响犬追踪训练的因素
(一)气温升高影响犬的兴奋性。
气温超过25℃时,犬的呼吸和心跳会加快,神经和注意力都会分散,兴奋性就会下降,对训练的印象就无法加深。 相似文献
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不分年龄、性别或血型,任何犬都有可能患上隔离性焦虑。宾西法尼亚大学的教授伊丽莎白研究发现,患有隔离性焦虑的犬过度依赖主人。它 相似文献