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Cao R.,China Agricultural University | Lin Q.,Shanghai Institute of Technology | Ren C.,Baicheng Academy of Agricultural Science | Li Z.,China Agricultural University
Nongye Gongcheng Xuebao/Transactions of the Chinese Society of Agricultural Engineering | Year: 2010

In order to choose the appropriate inactivation method, the effects of different enzyme inactivation treatments, which including hot air roasting, normal-pressure steaming, high-pressure steaming, infrared toasting and microwave heating, on flavor, whiteness, and pasting characteristics of oat flour were studied by electronic nose, sensory evaluation and rapid viscosity analysis. The results showed that PCA fingerprints of electronic nose distinguished different oat flour groups clearly from both two-dimensional and three-dimensional perspective. Sensory evaluation showed that the value of flavor followed the order from high to low: hot air roasting, infrared toasting, high-pressure steaming, normal-pressure steaming, and microwave heating. Whiteness measured by colormeter showed that with microwave treatment was the best, followed by infrared toasting, hot air roasting, high-pressure and normal-pressure steaming, respectively, which was generally in accordance with the results of sensory evaluation. Except pasting temperature, others of six rapid visco-analyser (RVA) characteristics were significantly different from each other. It was concluded that different enzyme inactivation treatments had quite different effects on oat flavor, color and starch gelatinization. According to different use, different inactivation methods should be chosen appropriately. Source

Islam M.R.,China Agricultural University | Islam M.R.,National Research Center for Intelligent Agricultural Equipments | Islam M.R.,University of Rajshahi | Xue X.,National Research Center for Intelligent Agricultural Equipments | And 6 more authors.
Journal of the Science of Food and Agriculture | Year: 2011

Background: Drought stress significantly limits oat (Avena sativa L.) growth and productivity. Thus an efficient management of soil moisture and study of metabolic changes in response to drought are important for improved production of oat. The objective was to gain a better understanding of drought tolerance mechanisms and improve soil water management strategies using water-saving superabsorbent polymer (SAP) at 60 kg ha-1 under three irrigation levels (adequate, moderate and deficit) using a new type of hydraulic pressure-controlled auto irrigator. Results: The results showed that the relative water content and leaf water potential (ψ1) were much higher in oats treated with SAP. Although the SAP had little effect on plant biomass accumulation under adequate and moderate irrigation, it significantly increased the biomass by 52.7% under deficit irrigation. Plants treated with SAP under deficit irrigation showed a significant decrease in superoxide dismutase, catalase, peroxidase, ascorbate peroxidase and glutathione reductase activities in leaves compared with control plants. Conclusion: Our results suggested that drought stress leads to production of oxygen radicals, which results in increased lipid peroxidation and oxidative stress in the plant, and the application of SAP could conserve soil water, making same available to plants for increased biomass accumulation and reduced oxidative stress especially under severe water stress. Copyright © 2010 Society of Chemical Industry. Source

Lin Y.,China Agricultural University | Zeng Z.,China Agricultural University | Ren C.,Baicheng Academy of Agricultural Science | Hu Y.,China Agricultural University
Procedia Engineering | Year: 2012

Water use efficiency (WUE) and some crop physiological responses were studied when oat (Avena nuda L.) was applied with alternate partial root-zone irrigation (APRI). A field experiment was carried out with two organic fertilizer levels (e.g. 0 and 240 kg hm-2) and three irrigation levels (i.e. 60, 90 and 120 mm). The irrigation methods included the conventional irrigation (CI) and APRI. Compared with CI, APRI under the moderate water stress reduced water consumption by 9.97-12.46%, and improved WUE by 0-9.09%, but the grain yield was slightly reduced by 2.1-12.76%. APRI under the severe water stress would significantly (P<0.05) reduce the plant height than CI. APRI with organic fertilizer could increase the root shoot ratio by 18.18-45.45% after the grain filling stage. Under the severe water stress APRI significantly reduced the net photosynthetic rate (Pn), and these treatments with organic fertilizer generally had much higher Pn than those without organic fertilizer. Our results indicate that APRI under the moderate water stress improves WUE and root shoot ratio, and slightly reduce grain yield and Pn with applied organic fertilizer. © 2012 Published by Elsevier Ltd. Source

Fan Y.,China Agricultural University | Ren C.-Z.,Baicheng Academy of Agricultural Science | Li P.-F.,China Agricultural University | Ren T.-S.,China Agricultural University
Chinese Journal of Applied Ecology | Year: 2011

This paper monitored the oat growth and cation absorption characteristics on a saline-alkali soil in the Baicheng region of Jilin Province under low, medium, and high levels of salt stress. No significant differences were observed in the shoot growth and yield components under the three levels of salt stress, but the root biomass and root/shoot ratio decreased significantly with increasing salt stress level. At maturing stage, the root/shoot ratio under medium and high salt stresses was 77.2% and 64.5% of that under low salt stress, respectively. Under the three levels of salt stress, the K+/Na+ and Ca2+/Na2+ ratios in oat plant had significant differences at trefoil stage, but no significant differences at heading stage. With the increase of salt stress level, the cation absorption selectivity coefficient of oat at filling stage decreased significantly, but the transportation selectivity coefficient had no significant difference under the three levels of stress. It was concluded that oat could adapt to the salt and alkali stress of soda-alkaline soil to some extent, and the adaptation capability decreased with the increasing level of stress. The decrease of oat root biomass and the stronger ion selective absorption capacity at heading stage under salt and alkali stress could benefit the shoot growth and yield components of oat. Source

Ban Y.,China Agricultural University | Qiu J.,Institute of Food and Nutrition Development | Ren C.,Baicheng Academy of Agricultural Science | Li Z.,China Agricultural University
Lipids in Health and Disease | Year: 2015

Background: The aim of present study is to investigate the influences of brewing and boiling on hypocholesterolemic effect of oatmeal in rats fed with a hypercholesterolemic diet. Methods: Fifty-six male Sprague-Dawley rats were divided into 5 groups of 8 rats each with similar mean body weights and serum cholesterol concentrations. Rats were fed with the experimental diets containing 10 % of oatmeal from two Chinese oat varieties which were brewed or boiled for 30 days. The lipids levels in serum, liver, and faeces were determined. Results: The effects of feeding boiled oatmeal on lowering lipid concentrations in plasma and liver were more significant than that of brewed oatmeal (P∈<∈0.05). Feeding boiled oatmeal was also more efficient in increasing fecal total lipids, cholesterol and bile acids as compared to feeding brewed oatmeal (P∈<∈0.05). Boiled oatmeal had higher apparent viscosity and soluble β-glucan content than the brewed oatmeal did (P∈<∈0.05). Conclusion: These results indicated that the capability of boiled oatmeal in improving cholesterol metabolism is better than that of brewed oatmeal, which is mainly attributed to its higher soluble β-glucan content and apparent viscosity. © 2015 Ban et al. Source

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