共查询到20条相似文献，搜索用时 234 毫秒
1.
应用生化分析方法对达赉湖的主要野生鱼鲇鱼肌肉中的蛋白质、脂肪、灰分、水分以及氨基酸进行定量分析。结果显示:鲇鱼肌肉中(干物质)蛋白质含量为83.46%,脂肪含量为4.83%,水分含量为76.66%,18种氨基酸总量为83.36%。必需氨基酸和鲜味氨基酸分别占氨基酸总量的40.82%和39.30%. 相似文献
2.
3.
4.
温度和频率对鱼糜介电特性的影响 总被引：2，自引：0，他引：2
采用同轴探针方法分别测定了30～80℃，频率320～2960MHz内罗非鱼鱼糜和阿拉斯加狭鳕鱼糜的介电常数和介电损失率。频率一定时，两种鱼糜的介电常数随温度升高而降低；在相同的温度下，频率增加，鱼糜的介电常数反而减小。频率升高使两种鱼糜的介电损失率先减少后增加，分别在890MHz(罗非鱼鱼糜)和1350MHz(狭鳕鱼糜)出现拐点。温度与介电损失率的相关性与频率有关，拐点频率之前，温度与介电损失率成正相关性，而大于拐点频率时，则成负相关性。本研究提出了两种鱼糜的介电常数和介电损大率关于温度和频率的预测方程，预测值与实验值具有良好的一致性。两种鱼糜的穿透深度在915MHz随温度升高而减小，在2450MHz时则正好相反。鱼种的差异对鱼糜介电特性和穿透深度有较大影响。SPSS软件可以对鱼糜的介电特性进行有效预测。 相似文献
5.
《渔业现代化》2020,(3)
应用近红外光谱技术建立仿刺参3种组分的快速定量模型,收集475个仿刺参(Apostichopus japonicus)样品,以蛋白质、锌和硒3种成分指标为代表,采用便携式NIR光谱仪MicroNIR1700(JDSU,USA)扫描得到仿刺参个体干样3种成分的近红外光谱数据,在全光谱区间建立PLS定量分析模型。结果显示:蛋白质模型的预测决定系数(Rp~2)、相对分析误差(RPD)分别为0.904、3.22,模型可用于大量样品快速检测应用。锌、硒模型的Rp~2分别为0.498和0.526,RPD分别为1.41和1.96,表明锌、硒模型效果不理想,需要进一步优化。本研究初步建立了仿刺参干样样品蛋白质、锌、硒定量分析模型,进行了仿刺参干样多种品质相关指标同时快速测定方法的探索,可为仿刺参养殖品质性状筛选和仿刺参消费市场产品质量管控提供方法和依据。 相似文献
6.
7.
以酪蛋白为蛋白源,配制蛋白质含量为19 80%～40 50%的6种精饲料,采用室内循环水养殖系统,在饱食投喂和(27±1)℃水温条件下对吉富品系尼罗罗非鱼幼鱼进行8周的饲养实验,比较其在淡水和海水中的生长及蛋白质需求。结果显示:尼罗罗非鱼在淡水和海水中生长良好,存活率分别为100%和87%～100%;随着饲料蛋白质含量增加,实验鱼的平均终重、增重率和日增重率呈线性增加,饲料系数呈线性下降,蛋白质效率也呈下降趋势。在相同的饲料蛋白水平下,上述指标在淡水鱼和海水鱼之间均无显著差异蛋白质适宜需要量为28%～32%。 相似文献
8.
9.
基于近红外光谱技术的鱼肉新鲜度评价方法的建立 总被引：1，自引：0，他引：1
采用近红外光谱技术和化学计量学方法,测定鳙(Aristichthys nobilis)、鲢(Hypophthalmichthys molitrix)和草鱼(Ctenopharyngodon idellus)等3种鱼肉不同新鲜度样品的挥发性盐基氮(TVB-N)、硫代巴比妥酸(TBA)值、K值和pH值,并同时采集其近红外光谱,以建立基于近红外光谱技术的鱼肉新鲜度的评价方法。结果表明,3种鱼鱼肉样品的新鲜度指标测量值覆盖范围均较大,满足建模要求。根据内部交互验证标准差确定了3种鱼鱼肉新鲜度指标的光谱预处理方法,采用偏最小二乘法(PLS)分别建立了鳙、鲢、草鱼鱼肉新鲜度的近红外定量分析模型。所建模型除鳙鱼肉TVB-N和TBA值模型的预测相关系数(Rp)较小外,其他指标模型的校正相关系数(Rc)和预测相关系数(Rp)均大于0.85,具有较好的拟合度和预测能力,能为鱼肉新鲜度的评价提供一种快速、简便的检测方法。 相似文献
10.
随着淡水渔业的发展和人民生活水平的提高,利用淡水鱼糜制作的模拟食品越来越受到人们的欢迎。将鲢、草、鲤等淡水鱼洗净,去骨、皮、鳞、内脏后,制成鱼糜,再加入低温保护剂和其他原料混合后,可制成多种模拟食品。鱼糜制品营养丰富,风味独特,食用方便,深受消费者欢迎。现将其加工制作技术介绍如下: 相似文献
11.
Lei Liu Yongling Song Huixing Shen Hui Hong 《Journal Of Aquatic Food Product Technology》2013,22(1):36-46
Gel properties of blends of surimi from silver carp and white croaker set for a range of times and at different temperatures were evaluated for breaking force, breaking distance, and whiteness. Total protein content was 12% in all samples, and the concentration of white croaker surimi protein in the blends was designed at 0, 10, 20, 30, and 40%. The blended surimi had greater gel strength than either of the two types of surimi alone. Breaking force and breaking distance after setting were also significantly higher than that of the blended surimi cooked directly without setting. The blended surimi exhibited less modori than either of the two types of surimi alone heated to 50°C. The whiteness values of the blended surimi were significantly higher than that of white croaker alone. These results indicate there are advantages to be gained in utilizing surimi from freshwater silver carp in blends with surimi from marine captured white croaker which is becoming limited in supply. 相似文献
12.
Seyed Ali Jafarpour Bahareh Shabnpour Sadegh Shirvani Filabadi Ali Shabani 《Journal Of Aquatic Food Product Technology》2013,22(3):291-302
Textural characteristics of silver carp surimi gel prepared from acid- and alkali-produced protein isolates were investigated and compared to the surimi gels derived by conventional methods. The acid-aided method showed the most efficiency to recover proteins (86.2%) in comparison to the alkaline-aided (79.8%) and conventional (76.7%) methods. In the washing of fish mince, every step resulted in reduction of sarcoplasmic protein, and consequently the myofibrillar fraction became more concentrated, as shown by the protein patterns in wash water. Some myofibrillar proteins (mainly actin and myosin) were removed along with sarcoplasmic proteins during washing, reducing yield efficiency during the conventional method of making surimi. During the pH shifting process, myosin heavy chain (MHC) was degraded during low (2.5) pH solubilization, whereas there was only a minimal loss of MHC by either hydrolysis or proteolysis during alkaline solubilization. The breaking force and breaking distance of surimi gel prepared in the pH-shifting processes were significantly (p < 0.05) greater than those of surimi gel made by conventional methods, as were expressible moisture, cohesiveness, and springiness. In conclusion, the pH-shifting technique can be considered as an efficient alternative process in recovery of greater quantities of functional protein from silver carp fillet. 相似文献
13.
鲢、狭鳕鱼糜微波加热凝胶形成的动力学分析 总被引：3，自引：0，他引：3
以鲢（Hypophthalmichthys mollitrix）和狭鳕（Theragra chalcogramma）鱼糜为对象,在微波、水浴两种加热条件下,对鱼糜及鱼糜大豆蛋白复合素材试样的凝胶特性——破断力值加以测定,进而考察不同加热方式下两种鱼糜的凝胶形成速度以及微波加热所需的活化能,并对试样能量吸收值进行了比较。结果表明：（1）鲢、狭鳕鱼糜微波加热凝胶形成速度比传统水浴加热高两个数量级,不同鱼种的鱼麋微波加热凝胶形成速度有一定的差异性（P〉0．05）。（2）微波加热下,欲达到相同的破断力值,鲢需要高于狭鳕1倍的活化能,两者对应的复合素材的活化能均小于相应的单一鱼糜试样。（3）与水浴加热相比,在能量吸收值相同的情况下,微波加热试样能达到更高凝胶破断力值。 相似文献
14.
Tong Chang Chenjie Wang Shanbai Xiong Youming Liu Ru Liu 《Journal Of Aquatic Food Product Technology》2017,26(1):103-114
In this study, gelation characteristics of bighead carp (Aristichthys nobilis) protein isolates prepared by pH shift processing were investigated as compared with those of surimi prepared by conventional wash processing. Results showed that the gel from alkali-aided protein isolate exhibited a higher breaking force than that from conventional washed surimi (p < 0.05). However, the gel from conventional washed surimi had higher whiteness (p < 0.05) and lower expressible moisture (p < 0.05). The rheological study showed that protein isolates exhibited different storage modulus and loss tangent patterns from conventional washed surimi during heating. Acid-aided processing could lead to higher denaturation and dissociation for fish muscle myosin and a coarser gel network from the sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) pattern and the scanning electron microscopy (SEM). Overall, there is a potential to apply pH shift processing, especially alkali-aided processing, to extract more proteins from bighead carp muscle for the production of surimi-based food. 相似文献
15.
《Journal Of Aquatic Food Product Technology》2013,22(1):57-78
ABSTRACT Five types of aquatic food industry waste products (carp offal, carp roe, fish frames, trout offal and surimi processing waste) together with fish meal were evaluated for their suitability as potential fish meal replacements, partially or wholly, in diets for three species (rainbow trout, Murray cod and shortfin eel) cultured in Australia, using a number of criteria. The proximate composition of the ingredients on a dry matter basis including protein content, lipid and ash, varied considerably. The essential amino acid (EAA) contents of the waste products and fish meal decreased in the order: carp roe > fish meal > carp offal > ‘surimi’ processing waste > fish frames > trout offal. The results of cluster analysis of A/E ratios of waste products and fish whole body fell within three clusters. The EAAI of whole body tissue of Murray cod, rainbow trout and Australian shortfin eel however, were closest to fish meal, followed by fish frame waste and/or ‘surimi’ waste. The results on A/E ratios and EAAI did not conform to the raw data on TAA and EAA. Therefore, the study emphasizes the need to have a multi-prong approach to determine the suitability of ingredients for incorporation into fish feeds. 相似文献
16.
在2 450 MHz频率的微波处理条件下,为了考察添加鲢鱼糜对小麦粉面团糊化的影响,将小麦粉、鲢鱼糜、NaCl和去离子水按比例混合制成鲢鱼糜面团,面团中鲢鱼糜含量分别为0%,10%,20%和30%(w/w,质量百分比),对样品面团中淀粉的介电特性和糊化特性进行研究。结果表明,对于相同尺寸的面团样品,添加鲢鱼糜可改善面团样品在电磁场中的加热均匀性。随着温度的升高,面团的介电常数和介电损失率分别在20~23和9~12内波动并呈下降趋势,微波的穿透深度因淀粉的糊化略有上升。淀粉的糊化速率随温度的升高而下降。降低样品中淀粉的含量,会使面团糊化活化能由113.54 kJ/mol下降至59.96 kJ/mol。 相似文献
17.
不同开口饵料对克氏原螯虾幼虾发育及消化酶活性的影响 总被引：3，自引：0，他引：3
实验采用丰年虫无节幼体、草鱼鱼糜、水蚯蚓、1号人工配合饲料和2号人工配合饲料为克氏原螯虾的开口饵料,观察幼虾存活率和生长情况。经过40d的培育,对幼虾的胃蛋白酶、胰蛋白酶、淀粉酶和脂肪酶的活力进行测定。结果表明：投喂丰年虫无节幼体的实验组幼虾存活率最高,为75,增重率和增长率也最大,分别为4746.00和171.00。幼虾的胃蛋白酶活性与投喂的饵料密切相关,投喂丰年虫无节幼体组幼虾的胃蛋白酶和胰蛋白酶活性分别为2.18U/mgprot和0.96U/mgprot,极显著高于投喂草鱼鱼糜实验组。实验的5种开口饵料中,丰年虫无节幼体是克氏原螯虾幼虾的最佳开口饵料。摄食丰年虫无节幼体可能提高了主要消化酶的活性,从而促进了克氏原螯虾幼体的生长。 相似文献
18.
本研究以鲟鱼(Acipenser sinensis)肉为原料,通过正交实验对鲟鱼鱼糜的漂洗工艺进行了优化,对鱼糜漂洗前后的蛋白质含量及其组成、水分分布、凝胶性能等进行了研究。结果显示,鲟鱼鱼糜的最佳漂洗工艺为：水漂洗1次,盐水漂洗1次,盐的质量分数为0.25%,漂洗时间为1 min。鲟鱼鱼糜经漂洗后,其盐溶性蛋白比例显著升高(P<0.01);鱼糜中的水分受到的束缚力增加,自由度减小,形成了更为致密的凝胶网状结构;破断力、凹陷距离、凝胶强度、持水力、白度等表征凝胶性能和鱼糜品质的指标明显提升。研究表明,采用恰当的漂洗工艺可显著提高鲟鱼鱼糜的品质。 相似文献
19.
圆苞车前子壳粉(psyllium husk powder, PHP)是一种富含膳食纤维的食品亲水胶体。为了解其在鱼糜制品中的作用,本实验以冷冻鲢鱼糜为研究对象,以凝胶强度和持水性(water holding capacity, WHC)为考察指标,研究了PHP的添加量、凝胶化温度和凝胶化时间3个因素对鱼糜凝胶特性的影响。在单因素试验的基础上,进行了三因素三水平的正交试验和验证试验。正交试验结果得到最佳工艺条件:PHP添加量0.1%,凝胶化温度45°C,凝胶化时间2 h。单因素试验结果表明,添加适量PHP (0.1%～0.3%)能够增加鱼糜凝胶的硬度和WHC,但对破断距离有不利影响;根据验证试验中蒸煮损失率、SDS-聚丙烯酰胺凝胶电泳(SDS-polyacrylamide gel electrophoresis, SDS-PAGE)和扫描电镜(scanning electron microscopy, SEM)分析,PHP的添加降低了较高凝胶化温度时凝胶的蒸煮损失,PHP或许可以促进肌球蛋白重链(myosin heavy chain, MHC)分子间交联,减缓蛋白质降解,形成更加致密的凝胶结构。本研究对PHP作为一种新型食品原料应用于开发优质健康鱼糜制品进行了初步的探究,以期为丰富亲水胶在影响鱼糜凝胶特性中的应用研究提供一定的参考。 相似文献
20.
几种淡水鱼内脏油脂提取的工艺条件 总被引：10，自引：1，他引：10
以草鱼、鳊、鲢三种高产的淡水鱼内脏的提取油脂原料，着重研究内脏油脂的提取工艺条件。研究中采用隔水蒸煮法提取油脂，以出油率和油脂的质量指标为评价依据，通过正交试验初步确立时间、温度和加碱量等主要影响因素，优选出较佳的提取淡水鱼内脏油脂的工艺条件，从而为扩大试验提供论据。 相似文献