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| 2. |
- Alander, B., et al.
(författare)
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A facile way of making inexpensive rigid and soft protein biofoams with rapid liquid absorption
- 2018
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Ingår i: Industrial crops and products (Print). - : Elsevier. - 0926-6690 .- 1872-633X. ; 119, s. 41-48
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Tidskriftsartikel (refereegranskat)abstract
- A novel and facile method to produce inexpensive protein biofoams suitable for sponge applications is presented. The protein used in the study was wheat gluten (WG), readily available as a by/co-product, but the method is expected to work for other cross-linkable proteins. The foams were obtained by high-speed stirring of pristine WG powder in water at room temperature followed by drying. Glutaraldehyde was used to crosslink the foam material in order to stabilize the dispersion, reduce its tackiness and improve the strength of the final foam. The foams were of medium to high density and absorbed readily both hydrophobic and hydrophilic liquids. The foam structure, consisting primarily of an open pore/channel system, led to a remarkably fast capillary-driven (pore-filling only) uptake of a hydrophobic liquid (limonene). Essentially all uptake occurred within the first second (to ca. 90% of the dry weight). In a polar liquid (water), the rapid pore-filling occurred in parallel with a more time-dependent swelling of the foam matrix material. Further improvement in the foam strength was achieved by making a denser foam or adding TEMPO-oxidized cellulose nanofibres. Soft foams were obtained by adding glycerol.
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| 3. |
- Andersson, Staffan, et al.
(författare)
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Carotenoid content and composition in rose hips (Rosa spp.) during ripening, determination of suitable maturity marker and implications for health promoting food products
- 2011
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Ingår i: Food Chemistry. - : Elsevier BV. - 0308-8146 .- 1873-7072. ; 128, s. 689-696
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Tidskriftsartikel (refereegranskat)abstract
- Carotenoids are important antioxidants and valuable bioactive compounds contributing to the health benefits of different foods, and rose hips are known for high bioactive content. This study investigated the content of carotenoids and chlorophylls in hips from four rose species during the ripening period. Carotenoid content varied greatly between harvesting times, although species and year, and interactions between factors, also played an important role. Some carotenoids were identified only in hips of specific rose species. Some of the investigated compounds decreased (chlorophyll a) or increased (lycopene) consistently over the ripening period and could therefore be useful as maturity markers. An optimal content of total or specific carotenoids, e.g. for food products containing rose hips, might be obtained by proper choice of harvesting time and rose species. (C) 2011 Elsevier Ltd. All rights reserved.
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| 5. |
- Andersson, Staffan, et al.
(författare)
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Effect of storage time and temperature on stability of bioactive compounds in aseptically packed beverages prepared from rose hips and sea buckthorn berries
- 2015
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Ingår i: Agricultural and Food Science. - 1795-1895 .- 1459-6067. ; 24:4, s. 273-288
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Tidskriftsartikel (refereegranskat)abstract
- Rose hips and sea buckthorn berries contain high amounts of beneficial bioactive compounds. In this study the content and stability of natural vitamins and antioxidants were investigated in two fruit beverages made from rose hip powder, sea buckthorn berry puree and white grape juice concentrate, and wheat germ oil in one of the beverages. Beverages were formulated, pasteurised and filled aseptically in Tetra Brik packages and stored up to 35 days at 4 degrees C or 22 degrees C. Samples were analysed for the content of ascorbic acid, carotenoids, major phenolics, tocochromanols, total phenols and total antioxidant capacity as ferric reducing ability. The largest changes occurred during the first 5 days of storage, thereafter mainly ascorbic acid decreased. In the wheat germ oil supplemented beverage, alpha-tocopherol was more rapidly degraded. Negative correlations between the decrease of some carotenoids and tocochromanols, and the increase of some phenolics, suggest relationships of redox reactions specific to the amount of oil supplemented. From the present study we can conclude that additions of oil to beverages should be carefully selected to avoid oxidations of bioactive compounds. Furthermore, packaging of the beverages should be carried out at higher temperatures and thereafter it should be stored at low temperatures (4 degrees C), which decreased oxidation of all bioactive compounds except ascorbic acid.
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| 6. |
- Andersson, Staffan, et al.
(författare)
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New Resistance Sources to Russian Wheat Aphid (Diuraphis noxia) in Swedish Wheat Substitution and Translocation Lines with Rye (Secale cereale) and Leymus mollis
- 2015
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Ingår i: Czech Journal of Genetics and Plant Breeding. - 1212-1975. ; 51, s. 162-165
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Tidskriftsartikel (refereegranskat)abstract
- Russian wheat aphid is an important pest in many wheat growing countries of the world. Different resistance genes to the pest have previously been identified. However, some biotypes of the pest are virulent to most of these genes. Swedish wheat-rye and wheat-Leymus, consisting of 235 accessions with substitutions and translocations, were investigated for resistance to the aphid. A total of 86 accessions were shown to be either resistant or moderately resistant. Resistance was found particularly in accessions having substitutions of 1R instead of 1D [1R(1D) or 1R(1D) + 6R(6D)], in translocations to 3D or 5A (3DL.3RS and 5AL.5RS) and in accessions with introgressions of Leymus mollis. Resistances to Russian wheat aphid obtained from the hereby reported chromosomes and combinations have not previously been reported. These rye and Leymus genes can thus be useful for widening the pool of resistance genes for future breeding of cultivars resistant to Russian wheat aphid.
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| 7. |
- Andersson, Staffan, et al.
(författare)
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Nya resistensgener för framtidens vete
- 2016
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Ingår i: LTV-fakultetens faktablad.
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Annan publikation (populärvet., debatt m.m.)abstract
- Det mest effektiva och miljövänliga alternativ som finns tillgängligt för att motverka skadegörare i odling är att använda resistensgener direkt i växten. Men det pågår en ständig kamp mellan skadegörarnas evolution som övervinner resistensen i växten och tillgängliga gener med resistent verkan. I detta projekt har vi därför undersökt ett vetematerial med inkorsade kromosomer från råg och strandråg. Resultaten visar hög förekomst av resistens för olika utvalda svampsjukdomar i det undersökta materialet och att resistensgenerna finns fördelade på många av de främmande kromosomerna. Slutsatsen från dessa undersökningar är att råg- och strandrågsmaterialet har en stor potential att tillföra nytt genetiskt material av resistensgener till veteförädlingen för att motverka många aggressiva svampsjukdomar.
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| 8. |
- Antonio, Capezza, et al.
(författare)
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Advances in the use of protein-based materials: towards sustainable naturally sourced absorbent materials
- 2019
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Ingår i: American Chemical Society Symposium Series (ACS). - : American Chemical Society (ACS). - 0097-6156 .- 1947-5918. ; 7:5
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Tidskriftsartikel (refereegranskat)abstract
- Superabsorbent polymers (SAPs) are important in the health-care and personal care industries. Products like bed pads and diapers improve the comfort and sanitary conditions for people all over the world, with SAPs reaching yearly production volumes of ca. 2 million tons. However, recent sustainability issues have questioned the high negative footprint of polymers from nonrenewable resources. Biomacromolecules, especially when functionalized, have properties that make them an attractive alternative for the production of biobased SAPs. Proteins are a particularly interesting alternative due to their high variability and because of their relatively low price, being available as side streams from the agricultural industries. Due to the harsh extraction conditions, these side stream proteins are not competing with the food industry and alternative source-effective uses are advantageous in a circular bioeconomy. As the properties of a SAP material come from a combination of neutralized functional groups to promote polar liquid uptake and intermolecular cross-links to prevent dissolution, proteins offer unique opportunities due to their variability in polymerization. An increased understanding of the protein characteristics and how these can be tuned through functionalization is therefore a prerequisite for the successful development of a commercial biobased SAP that utilizes industrial and nontoxic wastes toward more sustainable products. This review focuses on proteins as biomacromolecules with relevant characteristics for superabsorbent functions, and discusses the opportunities that they may offer toward sustainable SAPs utilizing nontoxic chemicals and following the green chemistry principles.
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| 9. |
- Ashraf, Rimsha, et al.
(författare)
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Identification of a Small Translocation from 6R Possessing Stripe Rust Resistance to Wheat
- 2023
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Ingår i: Plant Disease. - 0191-2917 .- 1943-7692. ; 107, s. 720-729
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Tidskriftsartikel (refereegranskat)abstract
- Wheat stripe rust, caused by Puccinia striiformis f. sp. tritici Eriks. & E. Henn, is the most devastating fungal disease of bread wheat. Here, a wheat-rye multiple disomic substitution line, SLU126 4R (4D), 5R (5D), and 6R (7D), possessing resistance against 25 races of P. striiformis f. sp. tritici, was used and crossed with Chinese Spring ph1b to induce homeologous recombination to produce introgressions with a reduced rye chromosome segment. Seedling assays confirmed that the stripe rust resistance from SLU126 was retained over multiple generations. Through genotyping-by-sequencing (GBS) platforms and aligning the putative GBS-single-nucleotide polymorphism (SNPs) to the full-length annotated rye nucleotide-binding leucine-rich repeat (NLR) genes in the parental lines (CS ph1b, SLU126, CSA, and SLU820), we identified the physical position of 26, 13, and 9 NLR genes on chromosomes 6R, 4R, and 5R, respectively. The physical positions of 25 NLR genes on chromosome 6R were identified from 568,460,437 bp to 879,958,268 bp in the 6RL chromosome segment. Based on these NLR positions on the 6RL chromosome segment, the three linked SNPs (868,123,650 to 873,285,112 bp) were validated through kompetitive allele-specific PCR (KASP) assays in SLU126 and resistance plants in the family 29-N3-5. Using these KASP markers, we identified a small piece of the rye translocation (i.e., as a possible 6DS.6DL.6RL.6DL) containing the stripe resistance gene, temporary designated YrSLU, within the 6RL segment. This new stripe rust resistance gene provides an additional asset for wheat improvement to mitigate yield losses caused by stripe rust.
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| 10. |
- Berger Ceresino, Elaine, et al.
(författare)
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Morphological and structural heterogeneity of solid gliadin food foams modified with transglutaminase and food grade dispersants.
- 2020
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Ingår i: Food Hydrocolloids. - : Elsevier BV. - 0268-005X .- 1873-7137. ; 108
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Tidskriftsartikel (refereegranskat)abstract
- We show in this study the impact of transglutaminase (SB6), glycerol (Gly) and linoleic acid (LA) on the development of gliadin (Glia) solid edible foams. Two concentrations of SB6 were tested, 0.58 U/g and 1.17 U/g, and sufficiently high concentration of SB6 was found essential to crosslink the gliadins. Greater cross-linking in foam prepared with gliadin and 1.17 U/g of SB6 (2-TG-Glia) was followed by an increase of the size of the bubbles as well as improved bubble spatial homogeneity when compared to the non-treated gliadin foam (0-Glia). The inclusion of Gly had little effect on the periodic morphology of 2-TG-Glia, and the formed bubbles decreased in size. The 3D images of 2-TG-Glia revealed that the boundaries of the foams were less defined as observed by x-ray tomography. Nanomorphology studied by SAXS indicated that Gly impared the unfolding ofgliadin in the foam. The addition of linoleic acid (LA) in the foams caused formation of the discontinous Glia network with large and spaced bubbles as revealed by x-ray tomograms. The synergistic interactions of Glia and LA led to the formation of lamellar phases in the foams as observed by SAXS. The results from this study show gliadin as a promising resource to create diverse new aerated foods and contribute to achieve the demand for plant proteins with great foaming functionality. The addition of food-grade dispersants such as, glycerol andlinoleic acid, show a versatility and suitability of gliadin for new food applications such as breakfast cereals and snacks.
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