| 1. |
- Albo, Anton, 1991, et al.
(författare)
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A framework concept for data visualization and structuring in a complex production process
- 2019
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Ingår i: Procedia Manufacturing. - : Elsevier BV. - 2351-9789. ; 38, s. 1642-1651
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Konferensbidrag (refereegranskat)abstract
- This paper provides a concept study for a visual interface framework together with the software Sequence Planner for implementation on a complex industrial process for extracting process information in an efficient way and how to make use of a lot of data to visualize it in a standardized human machine interface for different user perspectives. The concept is tested and validated on a smaller simulation of a paint booth with several interconnected and supporting control systems to prove the functionality and usefulness in this kind of production system. The paper presents the resulting five abstraction levels in the framework concept, from a production top view down to the signal exchange between the different resources in one production cell, together with additional features. The simulation proves the setup with Sequence Planner and the visual interface to work by extract and present process data from a running sequence.
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| 2. |
- Bengtsson, Anton, 1979, et al.
(författare)
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Effects of thermal processing on the in vitro bioaccessibility and microstructure of beta-carotene in orange-fleshed sweet potato
- 2010
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Ingår i: Journal of Agricultural and Food Chemistry. - : American Chemical Society (ACS). - 0021-8561 .- 1520-5118. ; 58:20, s. 11090-11096
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Tidskriftsartikel (refereegranskat)abstract
- The effects of different preparation methods on the bioaccessibility of beta-carotene in orange-fleshed sweet potato (OFSP), an important food crop in sub-Saharan Africa, have been evaluated using an in vitro digestion procedure. The preparation methods included, on fresh roots, boiling followed by pureeing and oil addition (BOL) and homogenization followed by boiling and oil addition (HOM); on milled flour from freeze-dried fresh roots, cooking of porridge followed by oil addition (POA) and oil addition to flour followed by cooking of porridge (POB). The retention of all-trans-beta-carotene ranged from 58% (POB) to 72% (BOL). The presence of oil during heating resulted in a significantly higher formation of 13-cis-beta-carotene for the POB-treated samples than for the other samples. The efficiency of micellarization of all-trans-beta-carotene after in vitro digestion was 50% (HOM), 48% (POB), 31% (POA), and 16% (BOL). Brightfield microscopy of the cell structure after processing and in vitro digestion showed a high degree of cell-wall rupture for the HOM-treated samples, whereas cells appeared intact for the BOL samples. Also, coherent anti-Stokes Raman scattering (CARS) microscopy showed smaller beta-carotene bodies residing in the HOM samples than in the BOL samples after digestion. These results suggest that the in vitro bioaccessibility of beta-carotene in an OFSP meal can be improved by processing methods that promote cell-wall rupture.
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| 5. |
- Bengtsson, Anton, 1979
(författare)
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Improving vitamin A nutrition in low-income countries. In vitro bioaccessibility of provitamin A carotenoids in biofortified orange-fleshed sweet potato
- 2010
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Doktorsavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Vitamin A deficiency is a major nutritional disorder in a large number of low-income countries that is caused by an inadequate intake of preformed vitamin A and provitamin A carotenoids in the diet. The objective of the present thesis was to evaluate orange-fleshed sweet potato (OFSP) as a biofortified food source of provitamin A carotenoids with a potential to be included in a diet for alleviating vitamin A deficiency. The effects of various thermal processing and drying methods on the retention and in vitro bioaccessibility of β-carotene in OFSP were investigated using HPLC and an in vitro digestion model. The cell structure and β-carotene morphology in fresh and thermally processed OFSP were visualized by brightfield and coherent anti-Stokes Raman scattering microscopy. The interactive effects of simultaneous uptake of β-carotene from micelles and iron were studied using a Caco-2 cell model.Biofortified OFSP cultivars from Uganda contained high levels of all-trans-β-carotene ranging from 108 to 315 μg/g dry weight. Traditional preparation methods resulted in moderate losses of β-carotene with approximately 78% of the all-trans-β-carotene content retained, and the effects of boiling, steaming and deep-frying were similar. However, the degree of cell wall damage strongly influenced the in vitro bioaccessibility of β-carotene, which was clearly indicated by the 31% to 50% transfer of all-trans-β-carotene from the OFSP matrix to the micellar phase in samples that were homogenized prior to boiling, considerably higher than in samples that were thermally treated prior to homogenization (11% to 22%). These findings correlated qualitatively very well with the differences observed in size and number of β-carotene bodies in the in vitro digested samples. Furthermore, β-carotene bodies were co-located with starch granules in the OFSP matrix. The Caco-2 cell model showed that the uptake of β-carotene was reduced in the presence of physiological amounts of ferrous chloride, and this effect was concentration dependent. However, no evidence of an impact of β-carotene on iron uptake was observed.The results in the present thesis indicate that a meal supplemented with OFSP together with a small amount of fat would provide enough β-carotene to completely cover the daily vitamin A requirements for preschool-age children. In summary, the high content and in vitro bioaccessibility of β-carotene from thermally processed OFSP suggests that this food crop can be considered a promising food-based approach to prevent vitamin A deficiency in a sustainable manner.
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| 6. |
- Bengtsson, Anton, 1979, et al.
(författare)
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In vitro bioaccessibility of beta-carotene from heat-processed orange-fleshed sweet potato
- 2009
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Ingår i: Journal of Agricultural and Food Chemistry. - : American Chemical Society (ACS). - 0021-8561 .- 1520-5118. ; 57:20, s. 9693-9698
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Tidskriftsartikel (refereegranskat)abstract
- Orange-fleshed sweet potato (OFSP) is currently promoted in parts of sub-Saharan Africa as a biofortified staple food with large potential to provide considerable amounts of provitamin A carotenoids. However, the bioaccessibility of provitamin A carotenoids from OFSP has not been widely investigated, especially not as an effect of different preparation methods. In this study, we used an in vitro digestion model to assess the bioaccessibility of beta-carotene from differently heat-processed OFSP. The fraction of carotenoids transferred from the food matrix to a micellar phase obtained after microfiltration and to a supernatant obtained after low-speed centrifugation was investigated. The percentage of accessible all-trans-beta-carotene in the micellar phase varied between 0.5 and 1.1% in the heat-processed OFSP without fat and between 11 and 22% with the addition of 2.5% (w/w) cooking oil. In comparison with the micellar phase, the percentage of accessible all-trans-beta-carotene in the supernatant phase was significantly higher (P
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| 7. |
- Bengtsson, Anton, 1979
(författare)
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Provitamin A Carotenoids in Orange-Fleshed Sweet Potato
- 2008
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Licentiatavhandling (övrigt vetenskapligt/konstnärligt)abstract
- Vitamin A deficiency is a major nutritional disorder in a large number of developing countries. The disorder is mainly caused by an inadequate intake of preformed vitamin A and provitamin A carotenoids from the diet. It is also recognized that vitamin A deficiency and iron deficiency tend to coexist in many population groups. On the other hand, recent studies have indicated that vitamin A and β-carotene might have a positive effect on iron absorption. The aim of the present thesis was to evaluate orange-fleshed sweet potato (OFSP) as a food source of provitamin A carotenoids and to study the interactive effects between β-carotene and iron on their respective uptake in an in vitro model. The effects of various processing and drying methods on the retention of all-trans-β-carotene in OFSP were investigated with a high-performance liquid chromatography (HPLC) method. The interactive effects of a simultaneous uptake of β-carotene from micelles and iron were studied using a Caco-2 cell model.Results showed that OFSP contains considerable amounts of all-trans-β-carotene (108-315 μg/g dry matter) and that the amount is highly dependent on the variety. Traditional preparation methods resulted in moderate losses of all-trans-β-carotene (approximately 78% of the all-trans-β-carotene content was retained) and the effects of boiling, steaming, and deep-frying were similar. These results demonstrate that one 100 g ready-to-eat portion of four out of the seven OFSP varieties in the present study would provide enough all-trans-β-carotene to completely cover the daily vitamin A requirements for preschool children.The in vitro model using Caco-2 cells showed that the uptake of β-carotene was significantly reduced (p
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| 8. |
- Brackmann, Christian, 1973, et al.
(författare)
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Visualization of β-carotene and starch granules in plant cells using CARS and SHG microscopy
- 2010
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Ingår i: Journal of Raman Spectroscopy. - : Wiley. - 0377-0486 .- 1097-4555. ; 42:4, s. 586-592
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Tidskriftsartikel (refereegranskat)abstract
- Information on the content and bioavailability of provitamin A carotenoids, such as beta-carotene, in plant foods is of great interest due to the widespread vitamin A deficiency in developing countries. While the amount of beta-carotene can readily be quantified with analytical techniques, there is limited information on beta-carotene morphology in native plant materials. Here, we introduce nonlinear microscopy for three-dimensional, label-free imaging of carotenoids in fresh and thermally treated plant tissues, providing quantitative information at single-aggregate level and detailed insight into their distribution. Carotenoids in orange-fleshed sweet potato (OFSP), carrot, and mango were visualized by coherent anti-Stokes Raman scattering (CARS) microscopy and, in the case of OFSP, related to the plant-matrix morphology by simultaneous second-harmonic generation (SHG) microscopy of starch granules. Sizes, shapes, densities, and location of different types of carotenoid bodies were quantified. While OFSP and carrot showed heterogeneous rod-shaped bodies with high carotenoid densities indicated by higher CARS signals, the carotenoid-filled lipid droplets in mango appeared as homogeneous low-density aggregates of rounded shape. In addition, beta-carotene densities and morphologies in OFSP were studied after thermal processing, showing that the bodies remain intact despite significant changes of the surrounding starch granules.
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