共查询到17条相似文献，搜索用时 156 毫秒
1.
2.
运用亚细胞分级方法分析羊栖菜亚细胞组分中6种必需元素Cu、Fe、Mn、Zn、Mg、Ca以及有害元素cd、Pb、Al、As的含量,以揭示羊栖菜中不同微量元素的亚细胞分区分布特征,探讨其特异性富集砷的特性。研究结果表明,Cu、Fe、Mn、Zn、Ca、Mg等必需微量元素主要储存在细胞壁中,而在胞液和细胞器中的分布特征不同。对于Al、Cd和Pb,细胞壁中的浓度远高于细胞器和胞液,但是对于As,胞液是最主要的储存部位,分布比例约为58％,其次为细胞壁（约为26％～27％）,最后为细胞器（约为15％～16％）。通过本研究推断胞液对As的区隔化作用很可能是羊栖菜特异性富集As和解毒As的重要原因。 相似文献
3.
泥鳅和大鳞副泥鳅营养成分分析 总被引：24，自引：3，他引：21
对泥鳅和大鳞副鳅肌肉的营养成分进行测定。泥鳅的水分,灰分,脂肪,蛋白质的含量分别为７８．２１％、１．１２％、２．３１％、１７．５５％;大鳞副泥鳅的分别为７８．８０％、１．１３％、２．５７％、１７．４０％。它们的１７种氨基酸含量分别为１６．１１％和１３．７８％,其中９种必需氨基酸含量分别为７．０２％和６．２９％。,经比较分析,两种泥鳅营养丰富,其中,泥鳅的营养价值要高于大鳞副泥鳅。 相似文献
4.
利用常规肌肉营养分析方法测定了四倍体泥鳅、二倍体泥鳅和大鳞副泥鳅的肌肉营养成分.结果表明:四倍体泥鳅、二倍体泥鳅和大鳞副泥鳅肌肉中蛋白质含量(鲜重)分别为18.68%、18.69%和18.20%;脂肪含量分别为0.796%、0.106%和1.203%;水分含量分别为79.81%、79.52%和78.40%;灰分含量分别为0.951%、1.188%和1.162%.3种泥鳅肌肉中都含有常见的17种氨基酸,其中包括9种人体必需氨基酸.氨基酸总量(占鲜重)分别为17.57%、18.11%和17.47%;必需氨基酸总量分别为7.84%、7.98%和7.76%,必需氨基酸的构成比例符合FAO/WHO的标准.鲜味氨基酸含量分别为6.98%、7.33%和6.95%.经比较分析,四倍体泥鳅和二倍体泥鳅肌肉中蛋白质含量、17种氨基酸含量、氨基酸总量和必需氨基酸总量均很接近,但都明显高于大鳞副泥鳅. 相似文献
5.
为研究稻虾综合种养对稻田土壤肥力和金属元素含量的影响,对潜江市稻虾综合种养田(渔沟以TRC表示、田面以PRC表示)和水稻单作田(以RM表示,作为对照)土壤不同土层(0～10 cm、10～20 cm和20～30 cm)的主要肥力指标和金属元素含量进行了对比。结果显示,各土层总氮、速效磷和总磷含量均表现出PRC RM TRC的趋势,有机质(20～30 cm土层除外)、氨氮含量表现出RM PRC TRC的趋势,硝态氮含量表现出TRC PRC RM的趋势。各土层的Cu、As、Mg和Mn含量均表现出TRC PRCRM的趋势,而Cd、Pb、Fe和Ca含量的变化趋势与之相反;除0～10 cm土层外,Cr、Zn和Ni含量在TRC、PRC和RM之间均无显著差异。根据《GB 15618—2018》中的污染风险筛选值,各土层的Cr、Cd、Pb、Zn、Ni、As含量均未超标,而Cu含量普遍超标,超标率的范围为14%～46%。研究表明,稻虾综合种养可能会促进田面土壤中氮磷的积累、降低渔沟土壤氮磷的含量,也可能引起土壤中Cu、As、Mg、Mn的积累及Cd、Pb、Fe和Ca的减少。 相似文献
6.
为了解鄱阳湖短颌鲚体内矿物元素的分布状况,以评价其食用卫生质量以及为丰富短颌鲚研究提供基础性资料,采用火焰发射法和石墨炉原子吸收光谱法,测定了鄱阳湖短颌鲚全鱼中的常量元素(Na、K、Mg、Ca)和微量元素(Fe、Mn、Cu、Zn),以及微量重金属元素(Pb、Cd、Cr)的含量,分析了矿物元素在鱼体内的富集状况,并与刀鲚、湖鲚、凤鲚体内的矿物元素含量进行比较分析。结果表明:鄱阳湖短颌鲚体内所含的11种元素中,常量元素中K的含量最高,微量元素中Cu的含量最低。总体上,鄱阳湖短颌鲚含有丰富的矿物元素且符合我国规定的限量标准,属于可安全食用范围。 相似文献
7.
四倍体泥鳅、二倍体泥鳅和大鳞副泥鳅营养成分分析 总被引：3，自引：0，他引：3
利用常规肌肉营养分析方法测定了四倍体泥鳅、二倍体泥鳅和大鳞副泥鳅的肌肉营养成分。结果表明：四倍体泥鳅、二倍体泥鳅和大鳞副泥鳅肌肉中（鲜重）蛋白质含量分别为18．68％、18．69％和18．20％;脂肪含量分别为0．796％、0．106％和1．203％;水分含量分别为79．81％、79．52％和78．40％;灰分含量分别为0．951％、1．188％和1．162％。三种泥鳅肌肉中都含有常见的17种氨基酸,其中包括9种人体必需氨基酸;氨基酸总量（占鲜重）分别为17．57％、18．11％和17．47％;必需氨基酸总量分别为7．84％、7．98％和7．76％;必需氨基酸的构成比例符合FAO／WHO的标准。鲜味氨基酸含量分别为6．98％、7．33％和6．95％。经比较分析,四倍体泥鳅和二倍体泥鳅肌肉中蛋白质含量、17种氨基酸含量、氨基酸总量和必需氨基酸总量均很接近,但都明显高于大鳞副泥鳅。 相似文献
8.
长江流域泥鳅与大鳞副泥鳅种质资源调查与研究 总被引：2，自引：1，他引：1
对长江流域泥鳅和大鳞副泥鳅野生群体进行了系统资源调查,结果显示,二倍体泥鳅(2n)与多倍体泥鳅(3n,4n,5n)在长江流域均有分布,其中二倍体泥鳅数目占有绝对优势,少量多倍体泥鳅集中分布于长江流域中游地区及若干湖泊。此外,显著性分析表明,泥鳅和大鳞副泥鳅的雌性个体都显著大于雄性个体,两物种间个体大小无显著性差异。二倍体泥鳅的体长与体质量明显小于三倍体泥鳅及四倍体泥鳅,而三倍体泥鳅与四倍体泥鳅间无显著性差异。野生群体中,泥鳅雌性个体所占比例从上游到下游逐渐减少,大鳞副泥鳅无明显变化。相关性分析显示,泥鳅体质量与地域经度呈负相关,大鳞副泥鳅体质量与地域经度无显著相关性。研究表明,长江流域多倍体泥鳅和大鳞副泥鳅物种资源丰富。 相似文献
9.
利用常规肌肉营养分析方法测定了四倍体泥鳅、二倍体泥鳅和大鳞副泥鳅的肌肉营养成分。结果表明: 四倍体泥鳅、二倍体泥鳅和大鳞副泥鳅肌肉中蛋白质含量(鲜重) 分别为18. 68%、18. 69%和18. 20%; 脂肪含量分别为0. 796%、0. 106%和1. 203%; 水分含量分别为79. 81%、79. 52%和78. 40%; 灰分含量分别为0. 951%、11188%和1. 162%。3种泥鳅肌肉中都含有常见的17种氨基酸, 其中包括9种人体必需氨基酸。氨基酸总量(占鲜重)分别为17. 57%、18. 11%和17. 47%; 必需氨基酸总量分别为7. 84%、7. 98% 和7. 76%, 必需氨基酸的构成比例符合FAO /WHO 的标准。鲜味氨基酸含量分别为6. 98%、7. 33%和6. 95%。经比较分析, 四倍体泥鳅和二倍体泥鳅肌肉中蛋白质含量、17种氨基酸含量、氨基酸总量和必需氨基酸总量均很接近, 但都明显高于大鳞副泥鳅。 相似文献
10.
采用电感耦合等等子体发射光谱仪对花鳗、欧鳗和日本鳗肌肉无机元素组成进行了测定。结果表明:花鳗肌肉中Ca含量最高,P含量次之。欧鳗和日本鳗肌肉中P含量最高,Ca含量次之。三种鳗鲡肌肉中Na、Mg、K含量相近且高低顺序相同,花鳗肌肉中常量元素和Zn、Fe、Mn的含量均高于欧鳗和日本鳗。三种鳗鲡肌肉中均含人体不可缺少的微量元素Zn。据此可认为花鳗营养价值最高。 相似文献
11.
The concentrations of 14 mineral elements (Na, K, Ca, P, Mg, Fe, Zn, Cu, Mn, Co, Cr, Ni, Cd and Pb), together with pH, moisture, ash and NaCl content, were determined in 38 feeds commonly available in Europe for trout (starter, fingerling, grower, brood), salmon (starter, fingerling, grower), eel (grower), and larval fishes.Large differences in the mineral composition, particularly the trace elements Fe, Zn, Cu, Mn, Co and Pb, exist within and between the different feed categories tested. The results obtained are discussed in the context of available information on the dietary mineral requirements of these fish species. 相似文献
12.
Mineral contents of the muscle tissue and the digestive gland of Octopus vulgaris during short‐term starvation 
下载免费PDF全文
下载免费PDF全文 We used spectrometry to study variation in the contents of minor (B, Cu, Fe, Mn and Zn) and major essential elements (Ca, K, Mg, Na and P) in the muscle tissue and digestive glands of Octopus vulgaris after 1, 2, 4 or 8 days of starvation and in fed controls. The contents of the major essential elements remained constant during 8 days of starvation. Na was the principal element found in both tissues, followed by K, P and Mg. The contents of the minor essential elements were higher in the digestive gland than in the muscle tissue, with increased contents of Fe, Mn and Zn (p < .05) during starvation, confirming the high capacity of this organ to accumulate trace minerals. In muscle tissues, B, Fe and Mn contents were lower and Cu and Zn contents higher, in starved animals than in fed animals (p < .05). Significant negative correlations between the digestive gland index and the contents of Cu, Fe and Zn suggested that the loss of weight of the digestive gland during starvation is responsible for this increase in mineral concentration. This and further information on variation in mineral content will help to optimize performance of diets formulated for the octopus. 相似文献
13.
Mineral Requirements of Penaeus vannamei: A Preliminary Examination of the Dietary Essentiality for Thirteen Minerals 总被引：2，自引：0，他引：2
D. Allen Davis Addison L. Lawrence Delbert M. Gatlin III 《Journal of the World Aquaculture Society》1992,23(1):8-14
Diets containing a complete mineral premix or mineral premixes from which Ca, P, Na, CI, K, Mg, Mn, Fe, Zn, Cu, I, Se, or Cr were individually deleted were fed to juvenile Penaeus vunnamei (mean initial weight 79.5 mg) over a 4-week experimental period. Final mean percent weight gain ranged from 1,472 (Cu-free mineral premix) to 1,991% (Na-free mineral premix) with an average of 1,812% for all treatments. Survival during the first two week period and the second two week period was greater than 92% and 88%, respectively. There were no significant differences observed among treatments for growth and survival data.
Upon termination of the growth trial, the hepatopancreas and carapace were dissected from the shrimp and evaluated for ash, Ca, P, Na, K, Mg, Mn, Fe, Zn and Cu content. Of the minerals analyzed, the individual deletion of Mg, Mn, Fe, Zn and Cu from the mineral supplement resulted in reduced tissue mineralization in P. vannamei whereas, the deletion of Ca and P from the mineral mix did not produce significant responses. Deletion of Se from the mineral premix resulted in a significant increase in the ash content of the carapace. Based on the information provided by this and other studies, further investigation of the dietary requirements of P. vannamei for Ca, P, Fe, Mg, Mn, Zn, Cu and Se is recommended. 相似文献
Upon termination of the growth trial, the hepatopancreas and carapace were dissected from the shrimp and evaluated for ash, Ca, P, Na, K, Mg, Mn, Fe, Zn and Cu content. Of the minerals analyzed, the individual deletion of Mg, Mn, Fe, Zn and Cu from the mineral supplement resulted in reduced tissue mineralization in P. vannamei whereas, the deletion of Ca and P from the mineral mix did not produce significant responses. Deletion of Se from the mineral premix resulted in a significant increase in the ash content of the carapace. Based on the information provided by this and other studies, further investigation of the dietary requirements of P. vannamei for Ca, P, Fe, Mg, Mn, Zn, Cu and Se is recommended. 相似文献
14.
Effects of conventional and organic feed on the mineral composition of cultured European sea bass (Dicentrarchus labrax) 下载免费PDF全文
下载免费PDF全文 F. Siano S. Bilotto M. Nazzaro G.L. Russo M. Di Stasio M.G. Volpe 《Aquaculture Nutrition》2017,23(4):796-804
European sea bass (Dicentrarchus labrax) is a widely consumed marine fish in Mediterranean areas, and different farming techniques are applied for fish culturing to satisfy the growing demand for seafood. The aim of this study was to investigate the effects of conventional and organic feed on the quality of cultured European sea bass (Dicentrarchus labrax) collected during the growth period. The concentrations of ash, moisture, essential macro‐elements (Ca, K, Mg, Na and P), micro‐elements (Co, Cr, Cu, Fe, Mn, Ni and Zn) and toxic elements (As, Cd, and Pb) were determined in feeds and in fillets of cultured fish. The results were compared to those obtained from wild sea bass. Results showed that the differences between organic diet‐fed and conventional diet‐fed sea basses varied in relation to the specific element measured and the growth period. The former showed higher concentration of Fe, Mg and Cr, and lower Na content. The amount of P, Na, Fe, Cu and Cr in wild sea bass was significantly (P ≤ 0.05) higher than that found in farmed fish. The levels of toxic elements in cultured sea bass were always within the allowed limit for fishery products. Wild samples had significantly (P ≤ 0.05) higher content of arsenic and lead than farmed sea bass. Cultured fish represent a valuable dietary source of essential macro‐ and micro‐elements. Controlled rearing systems and feedings were related to a decrease in the presence of some toxic metals in cultured fish compared with wild fish. 相似文献
15.
16.
17.
舟山群岛大鳞副泥鳅与台湾泥鳅的形态差异性分析 总被引：1，自引：0，他引：1
台湾泥鳅(Misgurnus anguillicaudatus)是台湾地区选育的泥鳅新品种,虽具有明显优于大鳞副泥鳅(Paramisgurnus dabryanus)的养殖性状,但在实际生产过程中往往会将这2种泥鳅混淆,为了科学识别形态特征相似的台湾泥鳅和舟山群岛大鳞副泥鳅,采用单因素方差分析、主成分分析和判别分析等多元分析方法定量比较舟山群岛大鳞副泥鳅与台湾泥鳅人工养殖群体的形态特征差异。结果显示:(1)2种泥鳅在本研究所涉24项形态评价指标中存在显著差异的达8项,两者在形态特征上具较好的区分度;(2)经主成分分析,提取到5个特征值均大于1的主成分,累计贡献率达75.463%,其中第1主成分为以营养生理状况、体型匀称程度为主导的体质强壮因子,第2主成分为以头部大小和胸鳍长短为主导的觅食运动功能因子,后3个主成分是与眼睛发达程度为主导的视野功能因子;(3)采用逐步判别法,以判别贡献率较大的8项形态评价指标为自变量,建立分类函数方程组。大鳞副泥鳅:func_1=-681.190+4.992x1+498.305x2+1778.188x3;台湾泥鳅:func2=-860.382+5.373x1+650.034x2+1894.839x3;所建判别函数可清晰区分舟山群岛大鳞副泥鳅与台湾泥鳅人工养殖群体,且判别准确率为100%。研究表明,虽然台湾泥鳅和大鳞副泥鳅形态特征相似,但能利用形态指标建立判别函数对两者进行科学、快速的判别。 相似文献