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     NET, and also make a detailed exposition of key technology.
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     The histological observation of the skin on snakehead mullet Ophiocephalus maculata Laep
     斑皮肤的组织学观察
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     Study on the Food Composition of Channa asiatica
     月食性的初步研究
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     Biological Characteristics and Culture of Channa asiatica
     月的生物学特性及其养殖
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Day and Bhimachar studied the skeletal system of Ophicephalus striatus Bloch.Gregory,Berg,Matsubara and other ichthyoligists proposed their views on the classification of Ophicephalidae according to the characters of the skeleton.But further study has not been made on its

本文比较了乌鳢和月鳢的骨骼特征。通过对两种标本的X射线摄影研究,乌鳢具有发育完好的腰带与腹鳍,而月鳢既无腰带也无腹鳍的痕迹,在脊柱和肋骨的形态及数目上也明显不同。对头骨和肩带的整体以及分离骨片所作的解剖观察表明,无论在外形上,犬牙分布上以及许多分离骨片的形态上,都有重要的差异。鳢类各个种通常都是根据鳞片、鳍条以及斑纹等特征来分类的,属的划分主要是根据腹鳍的有无。究竟为两属或为一属,学者意见尚不一致。通过对骨骼系统的研究,乌鳢和月鳢具有许多重要的差异,把它们作为一个属是否合适,值得商榷。

The histopathological changes of various organs(brain,eye,gill,heart,head kidney,liver,hepato-pancreas,spleen,kidney,intestine and ovary) in rickettsia-like organisms(RLOs) infected fish,Ophiocephalus argus C.have been reported,and the pathological mechanism has been discussed in this paper.The gross pathological characteristics were that cream-coloured nodules,a chronic granulomatous inflammation under microscopy,were observed on internal organs of infected fish,which had diagnostic significance. Because of...

The histopathological changes of various organs(brain,eye,gill,heart,head kidney,liver,hepato-pancreas,spleen,kidney,intestine and ovary) in rickettsia-like organisms(RLOs) infected fish,Ophiocephalus argus C.have been reported,and the pathological mechanism has been discussed in this paper.The gross pathological characteristics were that cream-coloured nodules,a chronic granulomatous inflammation under microscopy,were observed on internal organs of infected fish,which had diagnostic significance. Because of extensive tissue necrosis and marked fibroblast proliferation,5—10 giant sarcoma-like bodies with a distinctive boundary were seen on the surface of severe infected kidney.The blood vessels of internal organs showed fibrin thrombi,mixed thrombi and disseminated intravascular coagulation(DIC),and larger areas of tissue and cells showed severe degeneration,necrosis and extensive lysis.Eosinophilic intracytoplasmic inclusion-laden cells,which were mainly epithelial cells and phagocytic cells,situated mostly in the epithelium of gill,the endothelium of blood vessels and the connective tissue near to the blood vessels of gill and internal organs.The intracytoplasmic inclusions could result in swelling and rupturing of endothelial cells of blood vessels.The histopathological changes of various organs observed in experimentally infected fish with abundant RLOs were similar to those in naturally infected fish.The marked necrosis and larger granulomas were found in brain tissue,fibrin thrombi were also observed in blood vessels of brain membrane.The central necrotic area of granulomas in eye was larger.The gill lamellae were swollen and ruptured,epithelial cells showed necrosis and sloughed.The myocarditis and pericarditis were seen in heart.The severe changes were noted in the kidney.The kidney changes were characterized by the replacement of normal haematopoietic tissue with a large number of granulomas in different size.The renal tubules showed widespread degeneration.The renal corpuscles swelled,the glomerlus congested.The cavities of renal capsule were enlarged in which there were a large number of sloughing epithelial cells.The periphery tissue of kidney showed marked necrosis and extensive lysis.Though the pathological changes in the head kidney were light to those of the kidney,marked granulomas were seen.The granulomas in liver were mainly situated at the periphery of organ and the pathological lesion was mainly fatty degeneration.The epithelial cells in hepato-pancreas were swollen,the acinar cavities of pancreas disappeared.Spleen lesions were similar to those of the kidney.The intestine mucosa thickened,larger granulomas were observed in tunica muscularis with a distinctive boundary and thinner fibrosa.The connective tissue in ovary proliferated,and marked granulomas were also seen in ovary.

本文系统报道了养殖乌鳢类立克次体(Rickettsia-like organism,RLO)感染的各器官(脑、眼、鳃、心脏、头肾、肝、胰腺组织、脾、肾、肠和卵巢)的组织病理变化,探讨了炎症发展的基本规律。感染乌鳢病理解剖学特征和最具病理诊断意义的是体内各器官普遍出现的白色结节。这些结节的显微结构为肉芽肿炎症即一种慢性增生性炎症。在严重病变的肾脏,由于组织坏死区域较大和周围明显的细胞增生形成了境界较为清楚的巨大“肉瘤”状肿物。内脏器官的血管(特别是造血器官的血管)出现明显纤维素性血栓、混合血栓、弥散性血管内凝血(disseminated intravascu-lar coagulation,DIC)和组织细胞大范围的变性或坏死、溶解。大多数器官的组织细胞主要是上皮性细胞、吞噬性细胞,胞质内富含嗜酸性包涵体(eosinophilic intracytoplasmic inclusion),这种细胞多位于鳃上皮处、鳃部和体内器官血管内皮及血管周边结缔组织。血管内皮细胞及周边细胞内大量包涵体的出现导致血管内皮细胞的肿胀和破坏。

 
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