China Grain Reserves Corporation

Beijing, China

China Grain Reserves Corporation

Beijing, China
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Yuan X.,China Grain Reserves Corporation
Journal of Chinese Institute of Food Science and Technology | Year: 2013

Ferulic acid sugar esters showed noticeable biological activities, such as antioxidant activity, reducing blood sugar, and improving the micro environment in intestinal tract, which deserve further research. The distribution and structure of ferulic acid sugar esters were introduced in this paper. The preparation methods and nutritional values of ferulic acid sugar esters were presented. The application prospects in medicine, food, and cosmetics were analyzed.


Li Y.,Shanghai JiaoTong University | Li H.F.,Shanghai JiaoTong University | Dai Y.J.,Shanghai JiaoTong University | Gao S.F.,China Grain Reserves Corporation | And 4 more authors.
Applied Thermal Engineering | Year: 2011

Solar powered drying is an environment-friendly technique utilized to dry grain. A novel in-store drying system composed of flat-plate air collectors, a heat pump, fans, air ducts, and grain stirrer is proposed to make full use of solar energy and to reduce the consumption of electricity. A demonstration system was built and tested in Kunming, China. The experimental data was compared with the results derived from a mathematical simulation. The experimental and simulated data demonstrate that the solar assisted heat pump drying system improved the performance of the in-store drying process. An average temperature rise of 8.9 °C for the granary inlet air was achieved. The drying rate was increased and the uniformity of grain moisture content was improved. In addition, the grain was maintained in good quality and the level of power consumption was reduced. © 2011 Elsevier Ltd. All rights reserved.


Yuan X.,Beijing Technology and Business University | Yuan X.,China Grain Reserves Corporation | Wang J.,Beijing Technology and Business University | Shang Y.,Beijing Grain andOil and Food Inspection Institute | Sun B.,Beijing Technology and Business University
Journal of the Science of Food and Agriculture | Year: 2014

BACKGROUND: Cadmium in the human diet constitutes a potential chronic hazard to health. The objective of this study was to make a health risk assessment of dietary cadmium intake by adults in the 31 provinces (excluding Hong Kong, Taiwan and Macau) of China. RESULTS: The cadmium levels in a total of 2629 individual food samples ranged from not detected (below the limit of detection) to 17.32 mg kg-1, with the highest concentration being found in an offal sample. The food group 'meat' showed the highest mean level of 0.129 mg kg-1, while the lowest concentration of 8.0×10-4 mg kg-1 was measured in the food group 'fruit'. The mean cadmium intakes, hazard quotients and annual excess lifetime cancer risks for national, northern and southern adult populations in China were 3.67 μg kg-1 body weight (BW) week-1, 0.52 and 4.56×10-5 a-1, 2.63 μg kg-1 BW week-1, 0.38 and 3.27×10-5 a-1 and 4.56 μg kg-1 BW week-1, 0.65 and 5.67×10-5 a-1 respectively. CONCLUSION: The results of risk characterization for the national adult population were lower than safety risk levels of hazard quotient (1) and annual excess lifetime cancer risk (5×10-5 a-1). The mean annual excess lifetime cancer risk for the southern adult population was higher than the safety risk level. Therefore the carcinogenic risk for the southern population is of concern. © 2013 Society of Chemical Industry.


Li H.,Shanghai JiaoTong University | Li Y.,Shanghai JiaoTong University | Dai Y.,Shanghai JiaoTong University | Gao S.,China Grain Reserves Corporation | And 2 more authors.
Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery | Year: 2010

A hybrid solar drying system assisted by heat pump for grain in-store drying was developed. The system is composed of solar air collector, heat pump and stir machine for grain. The experimental study was conducted for maize drying. The results indicated that average thermal efficiency of the air collector is up to 63% and COP of the heat pump can reach 5.4. The combined system can supply adequate and stable thermal energy. The effect of drying is obvious. Drying time is reduced and energy consumption is low. Besides, the uniformity of moist content is improved. Utilized for maize in-store drying, the system can reduce the moisture content of maize in the granary with the characteristics of safety, energy saving and better effect.


Li H.,Shanghai JiaoTong University | Dai Y.,Shanghai JiaoTong University | Dai J.,Shanghai JiaoTong University | Wang X.,China Grain Reserves Corporation | Wei L.,Henan Weilai Machine Engineering Co.
Frontiers of Energy and Power Engineering in China | Year: 2010

For grain in-store drying, a solar assisted drying process has been developed, which consists of a set including a solar-assisted heat pump, a ventilation system, a grain stirrer, etc. In this way, low power consumption, short cycle time and water content uniformity can be achieved in comparison with the conventional method. A solar-assisted heat pump drying system has been designed and manufactured for a practical granary, and the energy consumption performance of the unit is analyzed. The analysis result shows that the solar fraction of the unit is higher than 20%, the coefficient of performance about system (COPS) is 5.19, and the specific moisture extraction rate (SMER) can reach 3.05 kg/kWh. © 2010 Higher Education Press and Springer Berlin Heidelberg.


Wang J.,Beijing Technology and Business University | Yuan X.,China Grain Reserves Corporation | Sun B.,Beijing Technology and Business University | Cao Y.,Beijing Technology and Business University
Food Technology and Biotechnology | Year: 2011

Wheat bran, an important by-product of the cereal industry, is rich in potentially health-promoting phenolic compounds. The phenolics are mainly esterified to the cell wall polysaccharides. In our previous paper, wheat bran was destarched and deproteinated by α-amylase, protease and amyloglucosidase successively and further hydrolyzed using Bacillus subtilis xylanases, and the enzymatic hydrolysates from wheat bran (EHWB) showed good scavenging activity in vitro. The aim of this study is to further characterize the antioxidant potential of EHWB against various systems, both ex vivo and in vivo, namely, rat liver microsomal lipid peroxidation systems induced by Fe2+/H2O2 and Fe3+-adenosine diphosphate (ADP)/dihydronicotinamide adenine dinucleotide phosphate (NADPH), copper- and 2,2′-azo-bis(2-amidinopropane) dihydrochloride (AAPH)-induced human low-density lipoprotein (LDL) oxidation systems, and alloxan-induced in vivo lipid peroxidation in mice. EHWB inhibited lipid peroxidation in rat liver microsomes induced by Fe2+/H2O2 and Fe3+-ADP/NADPH in a concentration-dependent manner with 90.3 and 87 % inhibition of lipid peroxidation at 50 mg/L, respectively, which were similar to that of butylated hydroxytoluene (BHT) at 20 mg/L. The antioxidant potential of EHWB at a concentration ranging from 10 to 20 mg/L in the nonenzymatic system was more effective than in the enzymatic system. EHWB strongly inhibited in vitro copper- and AAPH-mediated oxidation of LDL in a concentration- and time-dependent manner with 52.41 and 63.03 % inhibition at 20 mg/L, respectively, which were similar to that of ascorbate at 10 mg/L. EHWB significantly decreased the level of thiobarbituric acid reactive substances (TBARS) and increased the activities of glutathione peroxidase (GSH-Px), catalase (CAT) and superoxide dismutase (SOD) in serum and liver of alloxan-treated mice compared with the control. These results demonstrated that EHWB might be efficient in the protection of food products and humans against free radical-induced oxidative damage.


Huang K.,China Agricultural University | Wang X.,China Agricultural University | Liu X.,China Agricultural University | Wang X.,China Grain Reserves Corporation | Yang D.,China Agricultural University
Drying Technology | Year: 2013

In order to construct a 3D pore network reflecting the real pore structure of bulk grain, a series of 2D section images are obtained and used to reconstruct 3D images using MATLAB. The parameters of the 3D pore network are extracted by the maximal ball method. A stochastic 3D pore network with a random size is generated, but some throats are lost in generation. The parameter deviation between the original model and the generated model decreases with an increase in volume. There is almost no deviation when the space size is up to meter level. The image resolution of 0.5 mm is enough to extract parameters of the bulk grain. © 2013 Copyright Taylor and Francis Group, LLC.


Wang X.,China Grain Reserves Corporation | Hu Q.,China Agricultural University | Xiao B.,China Agricultural University | Yang D.,China Agricultural University | Liu X.,China Agricultural University
Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | Year: 2013

In order to reveal the mechanism of combined convective and infrared radiation in rice drying process and analyze heat and mass transfer characteristics, a mathematical model of combined convective and infrared radiation was established. The heat and mass transfer process in rice drying was simulated. According to the drying conditions in numerical simulation, the test rig of combined convective and infrared radiation was built up to analyze the influence of the drying process under the different operating conditions. The results showed that there was high relativity between the numerical model curves and the experimental curves.


Yue H.,University of Sichuan | Yue H.,China Grain Reserves Co. | He J.,University of Sichuan | He J.,Chengdu Drainage Co. | And 2 more authors.
Analytical Methods | Year: 2013

A simple and low-cost hydrogen peroxide (H2O2) biosensor has been developed using a Yucca filamentosa plant leaf membrane in conjunction with an oxygen (O2) sensor. The leaf membrane contains hydrogen peroxidase which can catalytically decompose H2O2 to produce O2. The response rate was faster for a Yucca membrane (t90 response time is ≈14 s) than a Yucca membrane with the O 2-permeable membrane (t90 response time is ≈200 s) and the sensitivity was much improved. The biosensor exhibited an excellent linear calibration range from 85 μM to 3.75 mM H2O2 (correlation coefficient r = 0.9999) with a detection limit of 15.1 μM; repeatability (1.024%, n = 10). The effects of pH and temperature on the response of the H2O2 biosensor have been studied in detail. The working life-time of the biosensor was good as it retains 86.7% of its initial sensitivity at 25 °C even after 2350 determinations of H 2O2 sample solutions. It has been successfully applied to the determination of H2O2 concentration in some commercial samples. © 2013 The Royal Society of Chemistry.


Han J.H.,Jiangsu University | Wu Q.F.,Jiangsu University | Xu B.,Jiangsu University | Zhou S.L.,China Grain Reserves Corporation | Ding F.,Jiangsu University
Quality Assurance and Safety of Crops and Foods | Year: 2016

Subcritical butane extraction (SBE) was used to extract oil from soybean germ and was compared with conventional n-hexane extraction (CHE) and supercritical CO2 extraction (SC-CO2E) methods. By analysing the extraction yield, composition of fatty acids and characteristic functional contents such as tocopherol, phytosterols and phospholipids in soybean germ oil (SGO), the selective extraction characteristics of subcritical butane were evaluated. The results indicate that compared to CHE and SC-CO2E, SBE had no significant difference on oil yield, fatty acid compositions, acid value and peroxide value of SGO. However, the contents of phytosterol and tocopherol in the oil extracted by SBE (2,772.9 and 188.9 mg/100 g) were evidently higher than those extracted by CHE (1,437.2 and 171.3 mg/100 g), with both being lower than those of supercritical CO2 extracted oil (3,982.4 and 227.6 mg/100 g). And, the content of phospholipids in SGO extracted by SBE (23.92 mg/g) was lower than that extracted CHE (38.47 mg/g). In conclusion, SBE was able to retain the bioactive compounds in SGO when compared with CHE. © 2015 Wageningen Academic Publishers.

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