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https://www.readbyqxmd.com/read/28396270/structural-thermal-and-rheological-properties-of-starches-isolated-from-indian-quinoa-varieties
#1
Khan Nadiya Jan, P S Panesar, J C Rana, Sukhcharn Singh
In this study starches isolated from Indian quinoa varieties were examined for physicochemical, morphological, thermal and rheological properties. Among isolated starches V1 showed higher starch yield and lower purity (48.45% and 98.32%) than V2 (41.28 and 98.53%). The amylose content was higher for V1 (12.10%) than V2 (9.46%). Swelling powers and solubility of the starches increased with increasing temperature. Peak viscosity (386.4 RVU) was higher for V1. In contrast V2 showed higher pasting temperature (72...
April 8, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28386266/increased-night-temperature-negatively-affects-grain-yield-biomass-and-grain-number-in-chilean-quinoa
#2
Jurka Lesjak, Daniel F Calderini
Quinoa high nutritive value increases interest worldwide, especially as a crop that could potentially feature in different cropping systems, however, climate change, particularly rising temperatures, challenges this and other crop species. Currently, only limited knowledge exists regarding the grain yield and other key traits response to higher temperatures of this crop, especially to increased night temperatures. In this context, the main objective of this study was to evaluate the effect of increased night temperature on quinoa yield, grain number, individual grain weight and processes involved in crop growth under the environmental conditions (control treatment) and night thermal increase at two phases: flowering (T1) and grain filling (T2) in southern Chile...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28372225/carotenoid-and-color-changes-in-traditionally-flaked-and-extruded-products
#3
Mario Cueto, Abel Farroni, Regine Schoenlechner, Gerhard Schleining, Pilar Buera
The objective of this study was to evaluate the impact of process and formulation on individual carotenoid loss in traditionally prepared cornflakes and those prepared by extrusion. The first step in the traditional process (maize grits cooking) promoted a 60% lutein content reduction and 40% in zeaxanthin loss, showing lutein more susceptibility to isomerization and decomposition. After toasting, the last step, the total loss averaged 80% for both compounds. The extruded maize in a plain formulation showed a 35% lutein and zeaxanthin reduction...
August 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28370110/steady-dynamic-and-structural-deformation-three-interval-thixotropy-test-characteristics-of-gluten-free-tarhana-soup-prepared-with-different-concentrations-of-quinoa-flour
#4
M Kürşat Demir, Gözde Kutlu, Mustafa T Yilmaz
Celiac disease is among the most important health problems and the most important feature of this disease is its being the only lifelong food allergy. To overcome this problem, some gluten-free and starch based food products have been generally introduced to the market; however, these products are starch based with low nutritive value. Therefore, it is important to enrich such products for individuals who are obliged to be nourished by gluten-free diet. In this study, wheat flour was replaced with quinoa flour (QF) in the production of tarhana...
April 2017: Journal of Texture Studies
https://www.readbyqxmd.com/read/28347301/does-social-distinction-contribute-to-socioeconomic-inequalities-in-diet-the-case-of-superfoods-consumption
#5
Joost Oude Groeniger, Frank J van Lenthe, Mariëlle A Beenackers, Carlijn B M Kamphuis
BACKGROUND: The key mechanisms underlying socioeconomic inequalities in dietary intake are still poorly understood, hampering the development of interventions. An important, but sparsely mentioned mechanism is that of 'social distinction', whereby those in a higher socioeconomic position adopt dietary patterns by which they can distinguish themselves from lower socioeconomic groups. We investigated the importance of distinction as a mechanism, by testing the socioeconomic gradient in the consumption of so-called 'superfoods' and the contribution of a well-established indicator of distinction, cultural participation...
March 27, 2017: International Journal of Behavioral Nutrition and Physical Activity
https://www.readbyqxmd.com/read/28337209/transcriptional-responses-of-chilean-quinoa-chenopodium-quinoa-willd-under-water-deficit-conditions-uncovers-aba-independent-expression-patterns
#6
Andrea Morales, Andres Zurita-Silva, Jonathan Maldonado, Herman Silva
HIGHLIGHTS R49 genotype displayed best performance on selected physiological parameters and highest tolerance to drought.R49 drought over-represented transcripts has exhibited 19% of genes (306 contigs) that presented no homology to published databases.Expression pattern for canonical responses to drought such as ABA biosynthesis and other genes induced in response to drought were assessed by qPCR. Global freshwater shortage is one of the biggest challenges of our time, often associated to misuse, increased consumption demands and the effects of climate change, paralleled with the desertification of vast areas...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28325341/amylopectin-molecular-structure-in-relation-to-physicochemical-properties-of-quinoa-starch
#7
Guantian Li, Fan Zhu
Structure-function relationships of starch components remain a subject of research interest. Quinoa starch has very small granules (∼2μm) with unique properties. In this study, nine quinoa starches varied greatly in composition, structure, and physicochemical properties were selected for the analysis of structure-function relationships. Pearson correlation analysis revealed that the properties related to gelatinization such as swelling power, water solubility index, crystallinity, pasting, and thermal properties are much affected by the amylopectin chain profile and amylose content...
May 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28317736/evaluation-of-phenolic-profile-and-antioxidant-capacity-in-gluten-free-flours
#8
Gabriele Rocchetti, Giulia Chiodelli, Gianluca Giuberti, Francesco Masoero, Marco Trevisan, Luigi Lucini
The characterization of phenolic fingerprints in common gluten-free flours is still scarce. Total phenolic and anthocyanin contents, antioxidant capacity and the entire phenolic profile were investigated for extracts from chickpea, sorghum, quinoa, black rice, lentil, amaranth, brown rice, oat and white rice flours, using soft wheat flour as a comparison. The highest phenolic content was found in black rice, followed by quinoa extracts (147.9 and 87.2mg gallic acid equivalents 100g(-1), respectively). Consistently, antioxidant capacity was highest in black rice and quinoa flours (34mmol trolox equivalents 100g(-1)), while anthocyanins were highest in black rice flour...
August 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28289421/preliminary-studies-of-the-performance-of-quinoa-chenopodium-quinoa-willd-genotypes-under-irrigated-and-rainfed-conditions-of-central-malawi
#9
Moses F A Maliro, Veronica F Guwela, Jacinta Nyaika, Kevin M Murphy
The goal of sustainable intensification of agriculture in Malawi has led to the evaluation of innovative, regionally novel or under-utilized crop species. Quinoa (Chenopodium quinoa Willd.) has the potential to provide a drought tolerant, nutritious alternative to maize. We evaluated 11 diverse varieties of quinoa for their yield and agronomic performance at two locations, Bunda and Bembeke, in Malawi. The varieties originated from Ecuador, Chile and Bolivia in South America; the United States and Canada in North America; and, Denmark in Europe, and were chosen based on their variation in morphological and agronomic traits, and their potential for adaptation to the climate of Malawi...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28274868/chemical-characterization-antioxidant-immune-regulating-and-anticancer-activities-of-a-novel-bioactive-polysaccharide-from-chenopodium-quinoa-seeds
#10
Yichen Hu, Jinming Zhang, Liang Zou, Chaomei Fu, Peng Li, Gang Zhao
Chenopodium quinoa, a promising nutraceutical cereal, has attracted increasing research interest, yet its polysaccharides remains to get few systematic studies. In this study, we employed orthogonal experimental design to optimize the ultrasound-assisted extraction process for highest yield of C. quinoa polysaccharides. A novel C. quinoa polysaccharide (CQP) fraction with high content and low molecular weight (8852Da) was subsequently purified by column chromatography, constituted by galacturonic acid and glucose monosaccharides...
June 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28267866/lexicon-development-consumer-acceptance-and-drivers-of-liking-of-quinoa-varieties
#11
Geyang Wu, Carolyn F Ross, Craig F Morris, Kevin M Murphy
Quinoa is becoming increasingly popular, with an expanding number of commercially available varieties. To compare the sensory properties of these quinoa varieties, a common sensory lexicon needs to be developed. Thus, the objective of this study was to develop a lexicon of cooked quinoa and examine consumer acceptance of diverse varieties. A trained panel (n = 9) developed aroma, taste/flavor, texture, and color descriptors to describe the sensory properties of 21 quinoa varieties. In addition, texture of the cooked quinoa was determined using a texture analyzer...
April 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28239982/phytochemicals-in-quinoa-and-amaranth-grains-and-their-antioxidant-anti-inflammatory-and-potential-health-beneficial-effects-a-review
#12
REVIEW
Yao Tang, Rong Tsao
Quinoa (Chenopodium quinoa Willd.) and amaranth (Amaranthus cruentus L.) are pseudocereal grains rich in both macronutrients and micronutrients including vitamins and minerals. The proteins are particularly of high nutritional quality due to the outstanding balance of essential amino acids. However, recent research strongly suggests that nonessential nutrients such as phytochemicals of quinoa and amaranth may also have potential health beneficial effects. This review focuses on the phytochemical composition of quinoa and amaranth seeds, the antioxidant and anti-inflammatory activities of hydrophilic (e...
February 26, 2017: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/28231117/compositional-analysis-of-whole-grains-processed-grains-grain-co-products-and-other-carbohydrate-sources-with-applicability-to-pet-animal-nutrition
#13
Alison N Beloshapka, Preston R Buff, George C Fahey, Kelly S Swanson
Our objective was to measure the proximate, starch, amino acid, and mineral compositions of grains, grain co-products, and other carbohydrate sources with potential use in pet foods. Thirty-two samples from barley (barley flake, cut barley, ground pearled barley, malted barley, whole pearled barley, pearled barley flakes, and steamed rolled barley); oats (groats, ground oatmeal, ground steamed groats, instant oats, oat bran, oat fiber, oat flour, quick oats, regular rolled oats, steamed rolled oat groats, and steel cut groats); rice (brown rice, polished rice, defatted rice bran, and rice flour); and miscellaneous carbohydrate sources (canary grass seed, hulled millet, whole millet, quinoa, organic spelt hull pellets, potato flake, sorghum, whole wheat, and whole yellow corn) were analyzed...
March 25, 2016: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28221036/review-of-the-assignment-of-the-absolute-configuration-by-nmr-using-chiral-derivatizing-agents-a-practical-guide-the-assignment-of-the-absolute-configuration-by-nmr-using-chiral-derivatizing-agents-a-practical-guide-by-jos%C3%A3-m-seco-emilio-qui%C3%A3-o%C3%A3-and-ricardo
#14
https://www.readbyqxmd.com/read/28218804/detection-of-lunasin-in-quinoa-chenopodium-quinoa-willd-and-the-in-vitro-evaluation-of-its-antioxidant-and-anti-inflammatory-activities
#15
Guixing Ren, Yingying Zhu, Zhenxing Shi
BACKGROUND: Lunasin is a novel cancer preventive peptide that has been detected in various plants. However, the presence and bioactivity of lunasin in quinoa has not been demonstrated. RESULTS: Lunasin was detected in quinoa using UPLC-ESI-MS. The content in fifteen quinoa samples ranged from 1.01 × 10(-3) g kg(-1) dry seed to 4.89 × 10(-3) g kg(-1) dry seed. Significant differences (p<0.05) in lunasin content among different cultivars (yy22, xsg86, xsg59, yy30 and yy19) from the same area and the same cultivar from different areas (Hainan, Hebei and Shanxi provinces) were observed...
February 20, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28178235/genomics-keen-insights-from-quinoa
#16
Andrew H Paterson, Alan L Kolata
No abstract text is available yet for this article.
February 16, 2017: Nature
https://www.readbyqxmd.com/read/28178233/the-genome-of-chenopodium-quinoa
#17
David E Jarvis, Yung Shwen Ho, Damien J Lightfoot, Sandra M Schmöckel, Bo Li, Theo J A Borm, Hajime Ohyanagi, Katsuhiko Mineta, Craig T Michell, Noha Saber, Najeh M Kharbatia, Ryan R Rupper, Aaron R Sharp, Nadine Dally, Berin A Boughton, Yong H Woo, Ge Gao, Elio G W M Schijlen, Xiujie Guo, Afaque A Momin, Sónia Negrão, Salim Al-Babili, Christoph Gehring, Ute Roessner, Christian Jung, Kevin Murphy, Stefan T Arold, Takashi Gojobori, C Gerard van der Linden, Eibertus N van Loo, Eric N Jellen, Peter J Maughan, Mark Tester
Chenopodium quinoa (quinoa) is a highly nutritious grain identified as an important crop to improve world food security. Unfortunately, few resources are available to facilitate its genetic improvement. Here we report the assembly of a high-quality, chromosome-scale reference genome sequence for quinoa, which was produced using single-molecule real-time sequencing in combination with optical, chromosome-contact and genetic maps. We also report the sequencing of two diploids from the ancestral gene pools of quinoa, which enables the identification of sub-genomes in quinoa, and reduced-coverage genome sequences for 22 other samples of the allotetraploid goosefoot complex...
February 16, 2017: Nature
https://www.readbyqxmd.com/read/28145738/influence-of-a-school-based-cooking-course-on-students-food-preferences-cooking-skills-and-confidence
#18
Rola Zahr, Lindiwe Sibeko
A quasi-experimental study was conducted to evaluate the influence of Project CHEF, a hands-on cooking and tasting program offered in Vancouver public schools, on students' food preferences, cooking skills, and confidence. Grade 4 and 5 students in an intervention group (n = 68) and a comparison group (n = 32) completed a survey at baseline and 2 to 3 weeks later. Students who participated in Project CHEF reported an increased familiarity and preference for the foods introduced through the program. This was statistically significant (P ≤ 0...
March 2017: Canadian Journal of Dietetic Practice and Research
https://www.readbyqxmd.com/read/28116242/molecular-characterization-of-endophytic-fungi-associated-with-the-roots-of-chenopodium-quinoa-inhabiting-the-atacama-desert-chile
#19
M González-Teuber, C Vilo, L Bascuñán-Godoy
Plant roots can be highly colonized by fungal endophytes. This seems to be of particular importance for the survival of plants inhabiting stressful habitats. This study focused on the Identification of the fungal endophytic community associated with the roots of quinoa plants (Chenopodium quinoa) growing near the salt lakes of the Atacama Desert, Chile. One hundred endophytic fungi were isolated from healthy quinoa roots, and the internal transcribed spacer (ITS) region was sequenced for phylogenetic and taxonomic analysis...
March 2017: Genomics Data
https://www.readbyqxmd.com/read/28109755/construction-of-agrobacterium-tumefaciens-mediated-tomato-black-ring-virus-infectious-cdna-clones
#20
Aleksandra Zarzyńska-Nowak, Inmaculada Ferriol, Bryce W Falk, Natasza Borodynko-Filas, Beata Hasiów-Jaroszewska
Tomato black ring virus (TBRV, genus Nepovirus) infects a wide range of economically important plants such as tomato, potato, tobacco and cucumber. Here, a successful construction of infectious full-length cDNA clones of the TBRV genomic RNAs (RNA1 and RNA2) is reported for the first time. The engineered constructs consisting of PCR-amplified DNAs were cloned into binary vector pJL89 immediately downstream of a double cauliflower mosaic virus (CaMV) 35S promoter, and upstream of the hepatitis delta virus (HDV) ribozyme and nopaline synthase terminator (NOS)...
January 18, 2017: Virus Research
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