Linseed oil inclusion in sea bream diets: effect on muscle quality and shelf life          下载免费PDF全文

Pedro L Castro  María J Caballero  Rafael Ginés  Juan C Penedo  Daniel Montero  María T Lastilla  Marisol Izquierdo 《Aquaculture Research》2015,46(1):75-85

Dietary lipid source in aquaculture has become a central topic in research whilst natural resources availability diminishes. Hence, to weigh up and forecast consumers impressions, the impact of partial (70%) and complete (100%) dietary replacement of fish oil (FO) by linseed oil (LO) on sensory and quality attributes was studied during the edible shelf life of gilthead sea bream (Sparus aurata). Physico‐chemical parameters (pH, torrymeter, total volatile basic nitrogen, thiobarbituric acid reactive substances and texture), and sensory analysis, both in cooked and raw fish were carried out during 17 days of ice storage. Throughout ice storage, feeding with LO diets, TBARS values remained lower on muscle than those found when feeding FO control diet. On freshly caught fish (day 0 of ice storage), statistically significant dietary texture variations were recorded on cooked fillet fed FO diet. No sensory differences on Quality Index Method, sensory profile or Torry scheme were found with partial or total LO replacement diets.  相似文献   

Treatment of Culicoides hypersensitive horses with high-dose n-3 fatty acids: a double-blinded crossover study   总被引：1，自引：0，他引：1  

Friberg  & Logas 《Veterinary dermatology》1999,10(2):117-122

In this double-blinded crossover study the clinical efficacy of high dose α-linolenic acid (linseed oil) for the treatment of Culicoides spp. hypersensitivity was evaluated. Seventeen privately owned horses from north Florida, USA completed the 18-week study. Criteria for inclusion included negative dermatophyte cultures, negative skin scrapes, failure to respond to ivermectin treatment, compatible clinical signs, positive skin test to Culicoides spp.antigen and a history of seasonal pruritus consistent with Culicoides spp. hypersensitivity. Horses were randomized and each horse's feed was supplemented with 200 mL of linseed oil (n-3 source) or 200 mL of corn oil (n-6 source) per day for a 6-week period. After a 6-week washout period, each horse was crossed over to the other supplement for an additional 6 weeks. Horses were evaluated every 3 weeks. The level of pruritus was determined by counting pruritic acts in a 30-min period. Total lesional surface area was determined by computerized evaluation of scanned photographs and documented physical examination findings. There was no significant change in level of pruritus observed between the groups ( P  = 0.89). Additionally, lesional surface area was not significantly different between the groups ( P  = 0.06). However, most owners stated that horses improved while supplemented with linseed oil.  相似文献   

Growth response and fatty acid composition of juvenile red claw crayfish (Cherax quadricarinatus) fed different sources of dietary lipid     

K.R. THOMPSON  T.J. BAILEY  L.S. METTS  Y.J. BRADY  C.D. WEBSTER 《Aquaculture Nutrition》2010,16(6):604-615

A study was conducted to determine the effects of different sources of dietary lipid that differ in fatty acid (FA) composition on growth, feed conversion ratio (FCR), survival, and whole‐body proximate and FA composition of juvenile red claw. Juvenile red claw (0.55 ± 0.02 g) were reared over a 12‐week period. Five practical diets were supplemented with 70 g kg^?1 oil (by weight) from either linseed oil (LO), canola oil (CAO), corn oil (CO), beef tallow (BT) or menhaden oil (MO) and formulated to contain 400 g kg^?1 crude protein. Red claw were fed three times daily (800, 1200 and 1600) to controlled excess. At the conclusion of the experimental period, there were no significant differences (P > 0.05) found in percentage survival and FCR among dietary treatments and values averaged 85.4% and 3.4, respectively. However, final mean weight and specific growth rate of red claw fed Diet 1 (LO) was significantly higher (16.44 g and 3.95% day^?1, respectively) compared with that of red claw fed Diet 4 (BT; 12.24 g and 3.43% day^?1, respectively), but not different from red claw fed the other three diets. Likewise, red claw fed Diets 1 (LO) and 2 (CAO) had significantly higher percentage weight gain (2990 and 2880%, respectively) compared with the BT diet (2124%), but not different from red claw fed Diets 3 (CO) and 5 (MO). Whole‐body fat and ash composition was significantly affected (P < 0.05) by source of added lipid, but no differences were found in whole‐body moisture and protein. Moreover, whole‐body FA composition showed differences among the varying oil sources and primarily reflected the FA in the diets. Results of the present study indicate that plant oils LO, CAO and CO rich in linolenic acid (18:3n‐3), linoleic acid (18:2n‐6) and oleic acid (18:1n‐9) perform as well as MO containing high levels of n‐3 highly unsaturated fatty acids eicosapentanoic acid (20:5n‐3) and docosahexaenoic acid (22:6n‐3) for juvenile red claw crayfish grown indoors lacking natural food items. Further, red claw fed a diet containing BT, which has a high percentage of saturated FA, performed poorly compared with LO and CO in regards to weight gain. It appears that juvenile red claw can be fed diets containing less expensive plant‐based oils with high levels of 18‐carbon unsaturated fatty acids. This could reduce diet costs for producers and allow for profitability.  相似文献   

复配亚麻籽油和辅酶Q10乳液的制备及表征   总被引：1，自引：1，他引：0  

黄娟  王云娟  白华  宋育聪  吕奕文  潘挺  潘芳 《农业工程学报》2020,36(6):292-299

亚麻籽油和辅酶Q10都具有水中溶解度低、稳定性差、生物利用度低等缺点。将亚麻籽油和辅酶Q10(coenzyme Q10,CoQ10)同时负载于乳液中,可解决两者的应用瓶颈。使用阿拉伯胶为乳化剂,采用高压均质法制备复配亚麻籽油和CoQ10乳液。采用动态光散射、透射电子显微镜、体外模拟消化、体外释放、稀释稳定性、冻融稳定性、离子强度稳定性、光稳定性和加速氧化稳定性方法对所制备乳液的理化性质进行表征。结果显示,制备的乳液平均粒径为(284±5.6) nm,多分散指数(polydispersity index,PDI)为0.112±0.025,为均匀分散的球形液滴。制备的乳液在模拟小肠液中消化,和亚麻籽油、CoQ10混悬液相比,乳化后亚麻籽油的消化速率和CoQ10的生物可给率明显提高。乳液中CoQ10的释放表现出缓释效果。制备的乳液具有较好的稀释和冻融稳定性。Na^+和Ca^2+会造成乳液Zeta电位的下降,对乳液稳定性影响较大。乳液载体化后CoQ10的光稳定性得到了提高。CoQ10对亚麻籽油具有较好的保护作用。  相似文献   

饲粮油脂对蛋鸡生产性能、血清脂质含量和蛋黄脂肪酸组成的影响   总被引：3，自引：2，他引：3  

夏中生  陈继新  谢梅冬  邹彩霞  卢洁 《广西农业生物科学》2003,22(3):171-177

选用90只50周龄海蓝褐壳蛋鸡,随机分成5组。5组饲粮中分别添加使用2%棕榈油(对照组,2%PO)、2%亚麻油(2%LO)、4%亚麻油(4%LO)、4%鱼油(4%FO)、4%火麻仁油(4%HO),研究不同油脂对蛋鸡生产性能、蛋黄中脂肪酸组成和血清胆固醇等脂质含量的影响。结果表明:(1)4%亚麻油组鸡产蛋率较对照组提高,差异显著(P<0.05),4%鱼油组和2%亚麻油组产蛋率与对照组差异不显著(P>0.05)。(2)与对照组比较,随着饲粮亚麻油用量的增加,蛋黄中α亚麻酸(ALA)、二十碳五烯酸(EPA)和二十二碳六烯酸(DHA)的含量增加(P<0.05);4%鱼油组蛋黄中EPA和DHA含量增加(P<0.05);4%火麻仁油组蛋黄中亚油酸(LA)和ALA的含量增加(P<0.05)。(3)饲粮中不同油脂影响蛋黄中n6/n3多不饱和脂肪酸(PUFA)比值,亚麻油、鱼油、火麻仁油能降低n6/n3PUFA比值(P<0.05)。(4)不同油脂对血清脂质含量无显著的影响(P>0.05),但亚麻油、鱼油、火麻仁油有降低血清总胆固醇、低密度脂蛋白胆固醇和甘油三酯的含量,提高高密度脂蛋白胆固醇浓度的趋势。  相似文献   

Replacement of a large portion of fish oil by vegetable oils does not affect lipogenesis, lipid transport and tissue lipid uptake in European seabass (Dicentrarchus labrax L.)     

Nadège Richard  Sadasivam Kaushik 《Aquaculture (Amsterdam, Netherlands)》2006,261(3):1077-1087

In order to investigate the impact of dietary lipid sources on mechanisms involved in lipid deposition, three groups of European seabass fingerlings with average initial body weight of 5.2 ± 1.0 g were fed three diets differing only by lipid source. These diets were: 100% anchovy oil (diet A), 40% anchovy oil-60% mix of vegetable oils (35% linseed, 15% palm, 10% rapeseed) (diet B) and 40% anchovy oil-60% mix of vegetable oils (24% linseed, 12% palm, 24% rapeseed) (diet C). After 64 weeks of rearing, when seabass reached the size of 160 g, the activity of lipogenic enzymes (fatty acid synthetase, glucose-6-phosphate dehydrogenase and malic enzyme) in liver and of lipoprotein lipase (LPL) in perivisceral adipose tissue, liver and white muscle were measured. Transport of lipid by lipoproteins was examined by determining plasma lipid composition and lipoprotein classes. Dietary oil source did not modify growth performance or lipid content of flesh and liver of seabass. Replacement of 60% of fish oil by the two mixtures of vegetable oils had no significant effect on hepatic lipogenesis and activity of LPL in liver and adipose tissue. Activity of LPL in white muscle was decreased in fish fed diet C compared to those fed diets A and B. Diets containing the mixture of vegetable oils led to lowered plasma, VLDL and LDL cholesterol levels compared to diet A.It is concluded that replacing 60% of fish oil by the two mixtures of vegetable oils in the feeds of European seabass fingerlings until they reach the size of 160 g has no marked effect on growth performance, lipogenesis and tissue lipid uptake but has a hypocholesterolemic effect.  相似文献   

Modification of the lipid profile and antioxidant status of the blood plasma of turkey hens fed mixtures with raw or extruded linseed          下载免费PDF全文

A. Czech  K. Ognik  M. Laszewska  E. Cholewińska  A. Stępniowska 《Journal of animal physiology and animal nutrition》2018,102(1):e270-e278

The aim of the study was to determine the most beneficial proportion of raw linseed in complete feed mixtures for turkey hens on the basis of lipid and redox indicators in the blood. In experiment 1, the turkey hens received the complete mixture with 2%, 4% or 6% linseed. On the basis of the results obtained in experiment 1, we selected the most effective proportion of linseed, which was given to the birds in the group receiving a 4% linseed additive. In experiment 2, the birds were fed mixtures with a 4% addition of raw or extruded linseed. The use of 4% raw linseed was found to improve production effects (improvement of weight gain, and lower feed conversion ratios), while extruded linseed in the diet of turkey hens did not affect growth performance. The use of linseed (4% and 6%) as a feed component for turkey hens led to an increase in indicators of antioxidant potential, that is the total antioxidant potential of the plasma, vitamins E and C, bilirubin and creatinine. A benefit resulting from the use of linseed, particularly in the amounts of 2% and 4% was a marked improvement in lipid indicators in the blood. The reduced percentage of unsaturated fatty acids (n‐3) following the use of extruded linseed resulted in a decrease in lipid peroxidation (lower content of malondialdehyde, superoxide and vitamins C and E in the blood). The most effective dose and form of linseed in the diet of turkey hens is 4% raw linseed.  相似文献   

Influence of phosphorus application on yield,yield components,and quality of linseed     

Kassu Tadesse Kassaye  Almaz Admassu Tirfe  Wubengeda Admasu Yilm  Dawit Habte Haile  Asrat Mekonnen Teto  Amare Tadesse Weldegebriel 《Journal of plant nutrition》2013,36(19):2525-2535

Abstract

Soil fertility depletion coupled with improper fertilization is one of the major constraints limiting linseed production in Ethiopia. Experiment was conducted in 2014/2015 on Nitisol in southeastern Ethiopian highlands to study the effect of phosphorus (P) fertilizer rate on yield, yield components, and oil content of linseed. It comprised of six levels of P fertilizer (0, 5, 10, 15, 20, and 25?kg?P?ha^?1) arranged in randomized complete block design with three replications. Results revealed that P fertilization brought significant effect on biomass yield, harvest index, plant height, number of capsules per plant, and kernel size. However, it didn’t significantly increase seed yield and oil content on linseed. Considering its influence on increasing biomass yield and improving yield components, application of 5?kg?P?ha^?1 has been recommended for replenishing the extracted P, maintaining soil fertility and improving linseed production on Nitisols of southeastern Ethiopian highlands and other similar agro-ecologies.  相似文献   

亚麻油对育肥猪肉品质及脂肪组织脂肪酸组成的影响   总被引：1，自引：0，他引：1  

蔡传江  车向荣  赵克斌  王立贤  颜华  程笃学  武晶 《畜牧兽医学报》2009,40(12)

本试验旨在研究饲料添加亚麻油(linseed oil,LO)对育肥猪胴体指标、肉质及脂肪组织脂肪酸组成的影响.选用平均体质量为63 kg左右的健康大白猪84头(其中21头阉公猪),按体质量相近、性别比例一致原则随机分为3组,每组设4个重复,每个重复7头猪(1或2头阉公猪).3个处理口粮为玉米-豆粕型日粮,分别添加0%、1.5%和3.0%LO,饲养试验时间为50 d.结果显示,与对照组相比,日粮中添加LO对猪胴体和肉晶质指标均没有显著影响(P＞0.05);日粮中添加LO显著提高皮下脂肪的α-亚麻酸(ALA)(P＜0.01)、EPA(P＜0.01)、DPA(P＜0.05)含量,以及多不饱和脂肪酸(PUFA)(P＜0.05)和n-3PUFA(P＜0.01)总含量,同时显著降低花生四烯酸(P＜0.01)和二十二碳四烯酸(P＜0.01)含量,而对n-6PUFA总含量无显著影响(P＞0.05).结果表明,猪不但可以直接沉积α-亚麻酸,而且能将其进行进一步延长和脱饱和;饲料中添加1. 5% LO可将猪皮下脂肪n-6:n-3PUFA比值降至4.1:1,接近人类健康饮食推荐水平,而日粮中添加3.0%LO则能降低皮下脂肪n-6:n-3PUFA比值至2.5:1,大大增加了猪脂肪组织的保健价值.  相似文献   

添加亚麻油对肉鸡脂肪沉积影响的研究     

刘利晓  李和平  李绍钰  王琳皴  魏凤仙  徐彬  赵晓青  郝国庆 《中国畜牧兽医》2009,36(3):27-31

试验旨在研究在日粮中添加3%、5%亚麻油对血清甘油三酯、总胆固醇、高密度脂蛋白胆固醇和低密度脂蛋白胆固醇的含量及对肝脏脂肪酸合成酶、腹脂脂蛋白脂酶活性和肉鸡腹脂沉积的影响。选择216只21日龄罗斯308商品代肉用母雏,随机分为3组,每组6个重复,每个重复12只。3组分别饲喂基础日粮（对照组）、添加3%亚麻油和5%亚麻油日粮,试验期3周。试验结果表明,血清甘油三酯水平在各组之间差异不显著（P>0.05）,与对照组相比,3%、5%亚麻油组总胆固醇水平上升（P>0.05）,高密度脂蛋白胆固醇水平下降（P>0.05）,3%亚麻油组显著提高了血清低密度脂蛋白胆固醇水平（P<0.05）。各处理组降低了肝脏脂肪酸合成酶和腹脂脂蛋白脂酶活性（P>0.05）,但与腹脂沉积的趋势并不一致。  相似文献