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Rapeseed

About: Rapeseed is a research topic. Over the lifetime, 2945 publications have been published within this topic receiving 51790 citations. The topic is also known as: Brassica napus & rape.


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Journal ArticleDOI
TL;DR: In this paper, the effect of solvent polarity and temperature of the extraction process on the antioxidant capacity (AC) and total phenolics content (TPC) in meal rapeseed extracts was evaluated.
Abstract: Response surface methodology (RSM) was used to evaluate the quantitative effects of two independent variables: solvent polarity and temperature of the extraction process on the antioxidant capacity (AC) and total phenolics content (TPC) in meal rapeseed extracts. The mean AC and TPC results for meal ranged between 1181-9974 μmol TE/100 g and 73.8-814 mg sinapic acid/100 g of meal. The experimental results of AC and TPC were close to the predicted values calculated from the polynomial response surface models equations (R 2 = 0.9758 and 0.9603, respectively). The effect of solvent polarity on AC and TPC in the examined extracts was about 3.6 and 2.6 times greater, respectively, than the effect of processing temperature. The predicted optimum solvent polarity of e = 78.3 and 63.8, and temperature of 89.4 and 74.2°C resulted in an AC of 10 014 μmol TE/100 g and TPC of 863 mg SAE/100 g meal, respectively. The phenolic profile of rapeseed meal was determined by an HPLC method. The main phenolics in rapeseed meal were sinapine and sinapic acid. Refined rapeseed oils were fortified with an extract - rich in polyphenols - obtained from rapeseed meal. The supplemented rapeseed oil had higher AC and TPC than the refined oil without addition of meal extracts. However, AC and TPC in the enriched oils decreased during storage. The TPC in the studied meal extracts and rapeseed oils correlated significantly (p<0.0000001) positively with their AC (R 2 = 0.9387). Practical applications: Many bioactive compounds extracted from rapeseed meal provide health benefits and have antioxidative properties. Therefore, it seems worth to consider the application of antioxidants extracted from the rapeseed meal for the production of rapeseed oils with potent AC. Moreover, antioxidants extracted from the rapeseed meal were added to refined rapeseed oil in order to enhance its AC. AC was then tested by FRAP assay. FRAP method is based on the reduction of the ferric tripyridyltriazine (Fe 3+ -TPTZ) complex to the ferrous tripyridyltriazine (Fe 2+ -TPTZ), and it is simple, fast, low cost, and robust method. FRAP method does not require specialized equipment and can be performed using automated, semi-automatic, or manual methods. Therefore the proposed FRAP method can be employed by the fat industry laboratories to asses the AC of rapeseed oils and meal.

34 citations

Book ChapterDOI
01 Jan 1990
TL;DR: Rapeseed is a good source of high-quality protein, but its use for both human food and animal feed is limited by the presence of high fiber and antinutritional factors such as glucosinolates, polyphenols, and phytic acid (PA) as discussed by the authors.
Abstract: Rapeseed is a good source of high-quality protein. However, its use for both human food and animal feed is limited by the presence of high fiber and antinutritional factors such as glucosinolates, polyphenols, and phytic acid (PA). Much work has been done to solve the fiber, glucosinolate, and phenolic problems, and these are discussed elsewhere in the book. Since PA can bind with minerals and proteins and is thought to reduce their bioavailability, studies have also been done to understand its reactions, nutritional effect, processing changes, and removal from rapeseed. This chapter provides an overview of such research.

34 citations

Journal ArticleDOI
TL;DR: In this article, the authors reported the average value of 68.45±0.92 C with a range of 67.10 to 69.29 C for rapeseed oil extracted from different Canadian varieties.
Abstract: Crismer Values of rapeseed oil extracted from different Canadian varieties are reported. Seventeen samples of oil containing up to 4.1% erucic acid gave an average value of 68.45±0.92 C with a range of 67.10 to 69.29. Crismer Values of high erucic acid oils (20~45% erucic acid) ranged from 76 to 82 C.

34 citations

Journal ArticleDOI
TL;DR: Results indicate that it is efficient to obtain transgenic plant of rapeseed using this protocol, and several essential factors that would affect the transformation efficiency, such as Agrobacterium strains, selection marker genes, and genotypes of rapeeed.
Abstract: Rapeseed (Brassica napus) is an important oil crop that supplies a considerable amount of global vegetable oil production. Genetic transformation system is important to gene functional analysis and molecular breeding. Here, an efficient Agrobacterium-mediated transformation protocol using hypocotyl of rapeseed as explants is described. To develop this protocol, we compared several essential factors that would affect the transformation efficiency, such as Agrobacterium strains, selection marker genes, and genotypes of rapeseed. Comparison of different Agrobacterium strains showed that the GV3101 had higher transformation efficiency than that of C58C1 and EHA105. HPTII, NPTII, and RePAT were used as selection marker genes in tissue culture. The results showed that the transformation efficiency was 3.7–4.8%, 2.2–22.5%, and 1.6–5.9% when the hypocotyl of Westar was infected by GV3101 and screened under hygromycin, kanamycin, and basta, respectively. The transformation efficiency of Westar was the highest and ZS11 was the lowest when five different genotypes of rapeseed (Westar, ZS9, ZS11, GY284, and WH3417) were infected by GV3101. Using this protocol, it will take 8–10 weeks to obtain transgenic plants. This protocol has been used to study gene function in several genotypes of rapeseed in our laboratory. These results indicate that it is efficient to obtain transgenic plant of rapeseed using this protocol.

34 citations

Journal ArticleDOI
01 Sep 1975-Lipids
TL;DR: Cardiac lipid analysis confirmed that erucic acid accumulation was proportional to the concentration of this acid in the diet, and cardiopathogenic properties appear to be associated with the triglycerides of the oil, and not to nontriglyceride components present in fully refined rapeseed oil.
Abstract: Rapeseed oils low in erucic acid caused myocardial lesions when fed to weanling male rats for 16 weeks. The cardiopathogenic properties appear to be associated with the triglycerides of the oil, and not to nontriglyceride components present in fully refined rapeseed oil. Cardiac lipid analysis confirmed that erucic acid accumulation was proportional to the concentration of this acid in the diet.

34 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20241
2023384
2022870
2021101
2020140
2019123