Einfluß der Prozeßparameter auf die Tocopherolbilanz bei der Gewinnung von pflanzlichen Ölen

Willner, T.; Jeß, U.; Weber, K.

doi:10.1002/lipi.19970990407

Cited by 11 publications

(4 citation statements)

References 3 publications

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“…It is evident that there is a considerable decrease in R total with increasing deodorization temperature. As far as the tocopherol retention is concerned, in spite of having been evaluated from the industrial experiments performed with the different deodorizer design, our plant-scale results appear to be in reasonable agreement with those of Willner et al [5] and Gogolewski et al [6]. Retentions of a-, gand d-tocopherol (R a , R g and R d , respectively) were calculated in a similar way as the ratio between the contents of the respective tocopherol homologue in deodorized and bleached oils, expressed in %.…”

Section: Figuresupporting

confidence: 88%

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Tocopherol retention in physically refined rapeseed oil as a function of deodorization temperature

Čmolík

Pokorný

Réblová

et al. 2008

Euro J Lipid Sci & Tech

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The effect of deodorization temperature (between 220 and 270 7C) on tocopherol retention in physically refined rapeseed oil during deodorization in a plant-scale semi-continuous tray-type deodorizer was investigated. Among the three tocopherol homologues detected in the samples of rapeseed oils under study, the a-and g-tocopherol homologues, with the latter predominating, constituted the most abundant part of total tocopherols, accompanied by a small amount of d-tocopherol. The retention values calculated for both total and individual tocopherols decreased linearly with increasing deodorization temperature. The retention of total tocopherols decreased considerably from 91.5% at 220 7C to 54.7% at 270 7C, approaching a value of about 80% in the main area of concern between 230 and 240 7C. The retention values of individual tocopherols as well as the slopes resulting from the equations relating these retentions to deodorization temperature were observed to decrease in the same order as their molecular weights. Since the retention of a-tocopherol is slightly higher than that of g-tocopherol, the average proportion of atocopherol during deodorization slightly increases at the expense of g-tocopherol.

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Section: Figuresupporting

confidence: 88%

“…Moreover, extrapolation of these models to other deodorizer designs is only possible in a relative way. Willner et al [5] investigated the influence of process parameters on the balance of tocopherols in rapeseed oil. Deodorizing was found to be the most important refining step.…”

Section: Introductionmentioning

confidence: 99%

Tocopherol retention in physically refined rapeseed oil as a function of deodorization temperature

Čmolík

Pokorný

Réblová

et al. 2008

Euro J Lipid Sci & Tech

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“…The content of tocopherols in oils is also affected by the processing conditions [5,25]. According to Murkovic [26], g-tocopherol in pumpkin seeds was in the range of 41-620 mg/kg.…”

Section: Resultsmentioning

confidence: 99%

Chemical characteristics of oils from naked and husk seeds of Cucurbita pepo L.

Nakić

Rade

Škevin

et al. 2006

Eur. J. Lipid Sci. Technol.

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Chemical characteristics of oils from naked and husk seeds of Cucurbita pepo L.Pumpkin seed oils from naked and husk pumpkin seeds, produced by an industrial process and by laboratory extraction, were evaluated for fatty acid composition, tocopherol, sterol and squalene content. The major fatty acids in the oils from both varieties were oleic, linoleic and palmitic acid, followed by stearic acid. The ratios of monounsaturated to polyunsaturated fatty acids for husk and naked seed oils were about 0.60 and 0.75, respectively. Analysis of tocopherols in industrially pressed and laboratory-extracted oils showed that husk seed oils had higher amounts of total tocopherols than naked seed oils. Oils extracted in the laboratory had higher amounts of tocopherols than industrial oils. Pumpkin seed oil, in general, had a high level of squalene, which was higher in husk seed oils than in naked seed oils and in extracted than in pressed oils. The total amount of sterols was higher in husk than in naked seed oils and in extracted oil samples. The main sterols were D7-sterols and their content was similar in all samples, but the content of D5-sterols was higher in oil samples of husk pumpkin seed and in extracted than in pressed oils.

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“…Tocopherols are sensitive to heat, light, alkali, and oil storage/processing conditions, they can oxidize to form tocoquinones, which no longer have antioxidant activities in oils . In comparison to the effect of canola oil extraction method on tocopherol amount, solvent‐extracted oil contains higher contents of tocopherols than cold‐pressed oil …”

Section: Attempts To Improve the Rapeseed Valuementioning

confidence: 99%

Current Research Developments on the Processing and Improvement of the Nutritional Quality of Rapeseed (Brassica napus L.)

Beszterda

Nogala‐Kałucka

2019

Euro J Lipid Sci & Tech

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Brassica napus is cultivated largely as a winter or semi‐winter form in Europe and Asia, respectively, whereas spring‐sown rape types are more adapted to the climatic conditions in Canada, northern Europe, and Australia. This plant, the third most important oil crop in the world after maize and oil palm, has had a unique history among those crops that have been targets of breeding and genetic modification. Although agronomy and genetic manipulations of B. napus plants to create seed with substantially no erucic acid content in the seed oil and meal largely free from aliphatic glucosinolates were major breakthroughs, opportunities for further advances in the reduction of antinutritive compounds/enhancement of bioactive compounds, in oil and meal health safety and quality, as well as in agronomic performance and pest resistance, are still greater today than they have ever been. Understanding and application of genetic control for key agronomic traits in B. napus, such as seed oil composition and concentration as well as their environmental interactions, are the main targets, which will underpin the development of the crop for cultivation in an extensive range of environments. It is also needed to improve phytochemical content through traditional breeding programs or through bioengineering of the phenylpropanoid pathway, leading to desirable secondary metabolite accumulation. This paper is a review of modifications (in the field of biotechnology, agronomy, and processing) that have been applied to improve the nutritional value of B. napus L. Practical Applications: This paper has value for people starting their scientific work in the field related to the B. napus biotechnology and nutritional value of vegetable oils. In addition, it is a current compedium of knowledge for people working professionally in the oil industry. Moreover, this article is a cross‐section of the current achievements of genetic engineering in improving the composition of rapeseed and indicates key publications on this subject. Brassica napus L., the third most important oil crop in the world after maize and oil palm, has a unique history among those crops that are targets of breeding and genetic modification. Effective tools of processing, biotechnology, and agronomy are essential to produce rapeseed oil with a high amount of bioactive compounds and continue to be employed in strengthening the product versatility.

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Einfluß der Prozeßparameter auf die Tocopherolbilanz bei der Gewinnung von pflanzlichen Ölen

Cited by 11 publications

References 3 publications

Tocopherol retention in physically refined rapeseed oil as a function of deodorization temperature

Tocopherol retention in physically refined rapeseed oil as a function of deodorization temperature

Chemical characteristics of oils from naked and husk seeds of Cucurbita pepo L.

Current Research Developments on the Processing and Improvement of the Nutritional Quality of Rapeseed (Brassica napus L.)

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