Quality Changes in Chum Salmon (Oncorhynchus keta) Caviar (ikura) Affected by Thermal Pasteurization,Storage Time,and Packaging Material     

Mahmoudreza Ovissipour  Chen Liu  Gülhan Ünlü  Barbara Rasco  Juming Tang  Shyam S Sablani 《Journal Of Aquatic Food Product Technology》2018,27(2):200-210

Changes in quality parameters including pH, water activity, texture, and lipid oxidation were studied in pasteurized chum salmon (Oncorhynchus keta) ikura samples packaged using two films with different oxygen transmission rates (OTR) (40 and 62 cm³·m^?2·day^?1; F-40 and F-62), during 60 days storage at 4°C. No significant differences in pH and water activity (a_w) were observed between ikura packaged using two different films with different OTR (P > 0.05). However, compared to the first day of study, water activity decreased significantly in ikura (P < 0.05). Ikura thiobarbituric reactive substance (TBARS) in the pouches significantly increased during the storage at 4°C (P < 0.05). Both pouches showed similar trends in TBARS until day 29, while after day 29, ikura packaged in F-62 (OTR = 62 cm³·m^?2·day^?1) showed a significant increase in TBARS compared to F-40 with less OTR (P < 0.05). The texture of ikura became softer compared to the first day; however, no significant difference was observed between the ikura samples in two pouches (P < 0.05). The quality changes of ikura measured during storage indicate that packaging ikura in a lower OTR film would provide greater quality retention than one with higher OTR.  相似文献   

催产素受体在雌性山羊腹腔肠系膜前神经节的分布     

任妮  吴卫妮  明佳  徐永平  王志豪  范洁  贾俊杨 《畜牧兽医学报》2012,43(6):985-990

本研究旨在探讨催产素(OT)是否可以影响雌性山羊腹腔肠系膜前神经节的活动。采用免疫组化SP法观察催产素受体(OTR)在雌性山羊腹腔肠系膜前神经节的分布特点。结果显示,催产素受体在腹腔肠系膜前神经节分布广泛,节内的神经细胞、支持细胞和过路纤维均有OTR免疫阳性产物分布;OTR主要在神经细胞中表达,相对表达量与其他非神经结构相比差异性极显著(P<0.01);在神经细胞中,OTR免疫阳性产物主要存在于胞膜和胞质,核不着色。雌性山羊腹腔肠系膜前神经节神经元对OT具有反应性,提示OT可能通过影响腹腔肠系膜前神经节神经元的活动,从而经其发出的交感节后神经这一途径调节胃肠的生理活动。  相似文献   

13种哺乳动物OTR密码子使用偏性及其聚类分析     

张之一  陈蕾  薛慧良  徐金会  徐来祥 《吉林林学院学报》2012,(1):44-48

目的研究13种哺乳动物催产素受体基因（OTR）密码子使用偏性,并探讨其影响因素;通过对偏性情况进行聚类分析,研究其与系统发育的关系．方法计算RSCU,CBI,ENC等密码子偏性指标,与可能的几种影响因素做相关性分析,采用SPASS15．0软件,以相对同义密码子使用度为变量对偏性情况进行聚类分析．结果与结论1）CUG,GUG,GCC,UUC,AUC,CGC为哺乳动物OTR使用频率较高的密码子;2）密码子第3位碱基的GC含量是影响哺乳动物OTR密码子偏性的主要因素,基因的GC含量次之,而芳香族氨基酸的含量和蛋白疏水水平对其密码子使用偏性的影响不大;3）对于功能相同的基因,亲缘关系相近的物种密码子使用偏性指标较接近,但某些物种仍有一定差异．  相似文献   

催产素受体在雌性山羊颈胸神经节的分布     

任妮  王志豪  吴卫妮  陈文东  范洁  徐永平 《中国兽医学报》2013,33(6)

为探讨催产素(OT)是否可以影响雌性山羊颈胸神经节的活动.采用免疫组化SP法观察催产素受体在雌性山 羊颈胸神经节的分布特点.催产素受体在颈胸神经节分布广泛,节内的神经细胞、卫星细胞和过路纤维均有OTR 免疫阳性产物分布;OTR主要在神经细胞中表达,相对表达量与其他非神经结构相比差异性显著(P＜0.05);在神经 细胞中,OTR免疫阳性产物主要存在于胞膜、胞质、核仁,核膜不着色.雌性山羊颈胸神经节神经元对OT具有反应 性,提示OT可能通过影响颈胸神经节神经元的活动,从而经其发出的交感节后神经这一途径调节其所支配的靶器 官如心血管、汗腺、呼吸等的生理活动.  相似文献