共查询到19条相似文献,搜索用时 882 毫秒
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目的:为促进青海地区亚麻籽及其加工副产物的高值化利用。方法:以青海省20种不同产地、品种亚麻籽为原料,采用反相高效液相色谱法测定其木脂素开环异落叶松酚葡萄糖苷和开环异落叶松脂素含量,并以 DPPH自由基和ABTS自由基清除能力评价其抗氧化活性。结果:青海省不同产地、品种的亚麻籽中木脂素含量差异显著(P<0.05),开环异落叶松酚葡萄糖苷和开环异落叶松脂素含量分别为7.53~23.33,0.85~2.55 mg/g;开环异落叶松酚葡萄糖苷和开环异落叶松脂素均具有清除DPPH自由基和ABTS自由基的能力,且差异显著(P<0.05)。结论:青海省不同产地、品种的亚麻籽中木脂素含量不同,均具有良好的抗氧化能力。 相似文献
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以5个品种亚麻籽为原料,分析和研究不同品种亚麻籽油的基本理化指标、脂肪酸分布、甘三酯组成,测定了亚麻籽及油中木脂素含量以及亚麻籽油中维生素E含量。结果表明:亚麻籽中粗脂肪质量分数为45%左右,油中不饱和脂肪酸含量较高,主要为亚麻酸(C18∶3/Ln),相对质量分数为49.20%~55.43%,其次是油酸(C18∶1/O),相对质量分数18.69%~28.21%,亚油酸(C18∶2/L)相对质量分数为10.85%~16.73%,总不饱和脂肪酸质量分数达到88%以上;亚麻籽油中主要的甘三酯为OLn Ln(17.27%~20.50%)和Ln Ln Ln(11.91%~17.02%);高效液相色谱法测定亚麻籽油中维生素E含量均达到6.59 mg/100 g以上;采用紫外可见分光光度计法分析测定亚麻籽和亚麻籽油中木脂素(SDG)的质量分数,分别为1.53%~3.69%和0.03%~0.22%。 相似文献
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目的:研究不同亚麻籽品种氨基酸含量及基于氨基酸含量的品质差异。方法:以6个产地的12个亚麻籽品种为研究对象,测定其氨基酸含量,并以17种氨基酸含量为评价指标进行主成分分析和聚类分析,研究不同品种亚麻籽氨基酸含量及基于氨基酸含量的品质差异。结果:亚麻籽品种对不同氨基酸含量的影响顺序为Met>Cys>Phe>Tyr>Arg>Glu>Pro>His>Asp>Ser>Lys>Gly>Thr>Ala>Ile>Val>Leu。主成分分析提取出3个主成分,其累计方差贡献率达86.695%,Ala、Arg、Thr、Leu和Cys可以作为12个亚麻籽品种基于氨基酸含量的品质综合评价指标。隶属函数法评价得出12个亚麻籽品种基于氨基酸含量的品质优劣顺序为晋亚7>晋亚8>轮选2>坝亚9>伊亚3>轮选1>宁亚16>宁亚17>伊亚4>陇亚8>坝亚11>陇亚10。结论:综合品质最佳亚麻籽品种为晋亚7,最差亚麻籽品种为陇亚10,综合评价将12个亚麻籽品种划分为四大类。 相似文献
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《食品科技》2014,(7)
研究了温和的碱水解条件对亚麻籽中木脂素(SDG)提取效率的影响。采用响应面法优化并确定了最佳的提取分离条件,并比较了我国不同产地亚麻籽中SDG的含量。研究结果表明,当碱度为3~20 mmol/L时,经足够长的时间水解,均能有效解离SDG聚合物。利用Box-Behnken中心组合设计试验,预测并经验证的最优碱水解条件为:碱浓度13 mmol/L、水解温度53℃、水解时间340.5 min。宁夏和内蒙古产的红色亚麻籽中SDG含量较高,分别为16.29±0.70 mg/g、15.41±0.78 mg/g,河北产的红色亚麻籽中SDG含量为13.13±0.63 mg/g,而河北产的黄色亚麻籽中SDG含量最低,为7.05±0.16 mg/g。研究获得的最优碱水解条件为评估亚麻籽资源品质、高效提取亚麻籽中木脂素及对木脂素进行准确定量等提供了重要的技术支持。 相似文献
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这项研究报道了加拿大植物基因资源中搜集的世界上多份亚麻材料和在加拿大登记的19个亚麻品种所进行的对比。亚麻品种差异用形态特征和含油量来体现,其比较是建立在单一性状基础上,另一项差异比较是建立在由库帕和丹尼斯建立的种内分类基础上,结果表明加拿大栽培品种属于28个植物变种中的2个变种。这项研究阐述了农业植物特性和基因库的收集对种植的益处。 相似文献
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Partial least squares (PLS) and artificial neural network (ANN) regression models were calibrated for predicting the content of secoisolariciresinol diglucoside (SDG) in six flaxseed cultivars, defatted flaxseed meal and flax hulls extracts. The SDG was quantified by HPLC after microwave-assisted extraction (MAE) from flaxseed; the data were used in conjunction with the light absorption of the extracts measured after Folin–Ciocalteu’s assay at 289, 298, 343 and 765 nm, in order to calibrate the predictive PLS and ANN models. The accuracy and the predictive ability of the models ranged from good to excellent as indicated by RPD values (the ratio of the standard deviation of the reference values to the standard error of prediction) of 5.03–13.7. The PLS and ANN predictive models are useful to the flaxseed processing industry for rapidly and accurately predicting the SDG contents of various flaxseed samples based on their UV–Vis light absorption. 相似文献
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An optimized microwave-assisted extraction (MAE) method was evaluated through repeatability, recovery and efficiency testing.
The repeatability tests, performed by three users over time, were not significantly different. The recovery of lignan throughout
the extraction, preparation and analysis steps is 97.5% with a coefficient of variation <1%. The MAE method is efficient for
extracting lignans from the plant matrix, and it achieves significantly higher extraction yields than the two established
reference methods. The applicability of the MAE method was demonstrated by extracting lignans from a variety of plant samples.
The secoisolariciresinol diglucoside (SDG) content of seven flaxseed cultivars grown in Saint-Mathieu-de-Beloeil, QC, in 2009
ranged from 14.6 to 18.9 mg SDG per gram of seed. Flax hulls produced in Winchester, ON, in 2010 were very rich in lignan;
their SDG content was 40.0 mg/g of flax hull. Sesame seeds contained 0.18–1.89 mg SECO (aglycone of SDG) per gram of seed,
with significant differences among black, white and brown sesame seed. Chia seeds contained 0.99–1.29 mg SECO per gram of
seed, with significant differences among batches of seeds. Sunflower seeds had 0.046 mg SECO per gram of sample and almonds
had 0.029 mg SDG per gram of sample. The optimized and evaluated MAE method is recommended for the general analytical quantification
of lignans in plant samples. 相似文献
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Sergei Belopukhov Inna Dmitrevskaya Ekaterina Grishina Sergei Zaitsev 《Journal of Natural Fibers》2017,14(1):126-133
The effects of humic substances (HS) extracted from flax shives on the fiber and seed yield of fiber flax were examined during 3 years field experiment. HS from shives consists of humic acids—5.3 gL?1 and fulvic acids—0.7 gL?1 were applied (6·10–2 gL?1 concentration, with 300 Lha?1 of spraying liquid) in “herring-bone” stage (BBCH 13 growth stage). The HS action was evaluated in different climatic conditions and in three varieties. Application of HS on early stage of vegetation of flax plants increased fiber yield (exceeding control on 16.0–28.1%) and quality (5% of cellulose content), protein and oil content in seeds (up to 1.9–4.2% and 1.6–3.5%, respectively). Positive reply of flax plants on HS from flax shives in tested cultivars allows saying about prospects of this type of humic substances. 相似文献
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Yu-Fu Wang Cai-Sheng Qiu Elvyra Gruzdeviene Song-Hua Long Efthymia Alexopoulou 《Journal of Natural Fibers》2018,15(3):309-324
In Western Europe fiber flax breeding was started in the Netherlands in 1816, and pedigree selection was introduced in 1900 in the Netherlands also. Therefore, the commercial breeding of fiber flax started at the end of the 19th century. Flax breeding in other European countries started in the early 20th century. Before Western European variety became available, European varieties seeds were imported from Russia. In China, breeding work on fiber flax began at 1950s. After the end of the 20th century, flax breeding technologies developed more rapidly. The flax breeding methods now include hybridization, induced mutation, interspecific hybridization, utilization of male-sterility, ploidy breeding, tissue culture, gene transformation, marker assisted selection, etc. Despite of new breeding methods, the cross breeding is still the main breeding method for fiber flax. The history of flax breeding, germplasm collection, breeding goals, breeding programs, breeding methods, and new varieties are presented in the article. Some problems about flax breeding were analyzed, and some suggestions were presented. 相似文献
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《Journal of Natural Fibers》2013,10(4):17-36
Abstract The paper presents the main goals, trends, and methods of flax and linseed breeding carried out in the Czech Republic. The list of registered flax and linseed varieties accompanied by their agronomical characteristics is presented. The breeding method of the last registered flax variety Venica, as well as its agronomical properties, are described. 相似文献
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Yixin Wu Hong Wang Yufu Wang Charles Stephen Brennan Margaret Anne Brennan Caisheng Qiu Xinbo Guo 《International Journal of Food Science & Technology》2021,56(1):196-204
The study aimed to evaluate the biosynthesis and accumulation of lignans, phenolic acids and also the antioxidant activities in 15 varieties of flax sprouts. The differential contents of lignans (13.30–8987 μg g−1) and phenolic acids (72.55–597.1 μg g−1) among 15 varieties of flax sprouts were observed. The total antioxidant activities ranged from 147.2 to 332.8 μmol TE g−1 in the flax sprouts. The expression levels of five genes in the lignin synthetic pathway were analysed using RT-qPCR, and the results showed dramatical differences among different flax sprouts. Relatively dispersed analysis was showed by principal component analysis (PCA), and 15 flax sprouts were grouped by hierarchical cluster analysis (HCA) based on their phenolic acids, lignan compounds, length, gene expression and antioxidants after germination, primarily in relation to variety specificity. Present results would be instructive guidance for bio-fortification breeding and functional foods innovation in flaxseeds. 相似文献
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亚麻曾是黑龙江省的资源优势,种植面积和纺织产业在全国占有举足轻重的地位。面对目前亚麻种植面积大幅减少,导致亚麻原料严重不足的形势,本文从推广新品种、建设种子基地、建设原料基地等方面,提出和论述了发展黑龙江省亚麻原料生产的主要对策。 相似文献
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不同提取方法及因素对亚麻蛋白功能性质的影响 总被引:1,自引:0,他引:1
通过单因素和正交试验优化高速剪切、超声酶解两步水解黄精工艺,并用黄精水解液和糯米混合发酵酿制新型黄精黄酒。结果表明,黄精原料高速剪切工艺参数为剪切时间50 min、剪切pH 2、剪切速率14 000 r/min、料液比1∶50(g∶mL);黄精滤渣水解工艺参数为纤维素酶添加量2%、超声功率200 W、料液比1∶20(g∶mL)、超声时间60 min。在此优化条件下,黄精多糖溶出率达52.5%,水解率为81.3%。黄精水解液与糯米结合发酵的新型黄精黄酒呈淡黄色、清亮透明、酸甜适中,具有黄精中药原有的特殊香味;其中,经检测新型黄精黄酒多糖含量为5.01 mg/mL,远高于传统黄精黄酒、传统黄酒。 相似文献