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Lu Q.,Northeast Forestry University | Zhu M.,Heilongjiang Vocational Institute of Ecological Engineering | Zu Y.,Northeast Forestry University | Liu W.,Northeast Forestry University | And 5 more authors.
Food Chemistry | Year: 2012

Nowadays, lignin antioxidant study is a hot spot. But some properties of lignin make it hard for a wide range of application. To improve lignin antioxidant activity, we employed supercritical antisolvent (SAS) method for preparation of nanoscale lignin (0.144 ± 0.03 μm) using acetone as a solvent and supercritical carbon dioxide as an antisolvent. The nanoscale lignin was characterised by Scanning Electron Microscopy (SEM), Fourier-Transform Infrared Spectroscopy (FTIR) and X-ray Diffraction (XRD). The results showed that SAS process did not result in lignin degradation or chemical structure change. Due to solubility increase, many antioxidant parameters of the nanoscale lignin were obviously enhanced, including DPPH radical scavenging activity, superoxide radical scavenging activity and reducing power. As an antioxidant, the nanoscale lignin was a better material than the non-nanoscale lignin. Our study was to promote the lignin application in animal husbandry, pharmaceutical and food processing industries. © 2012 Elsevier Ltd. All rights reserved.

Huang S.,Northeast Forestry University | Huang S.,Heilongjiang Vocational Institute of Ecological Engineering | Sun X.,Northeast Forestry University | Zhang Y.,Northeast Forestry University | And 2 more authors.
Journal of Forestry Research | Year: 2016

Nutrient retranslocation in trees is important in nutrient budgets and energy flows in forest ecosystems. We investigated nutrient retranslocation in the fine roots of a Manchurian Ash (Fraxinus mandshurica) and a Larch (Larix olgensis) plantation in northeastern China. Nutrient retranslocation in the fine roots was investigated using three methods, specifically, nutrient concentration, the ratio of Ca to other elements (Ca/other elements ratio) and nutrient content. The method based on nutrient content proved most suitable when investigating nutrient retranslocation from fine roots of the two species. The nutrient-content-based method showed that there were retranslocations of N, P, K and Mg from the fine roots of Manchurian Ash, with retranslocation efficiencies of 13, 25, 65, and 38 %, respectively, whereas there were no Ca retranslocations. There were retranslocations of N, P, K, Ca and Mg from the fine roots of Larch, with retranslocation efficiencies of 31, 40, 52, 23 and 25 %, respectively. © 2016 Northeast Forestry University and Springer-Verlag Berlin Heidelberg

Zhang J.-J.,Harbin University of Commerce | Li W.-L.,Harbin University of Commerce | Ding Z.-D.,Heilongjiang Vocational Institute of Ecological Engineering | Zang B.-S.,Harbin University of Commerce | Zhu F.-F.,Harbin University of Commerce
Chinese Journal of New Drugs | Year: 2013

Metabonomics, a newly developed branch of genomics, has been becoming an important component in researching the material foundation for the effectiveness of traditional Chinese medicine. Metabonomics is one of the important platforms in this research field. It can be directly applied to wholly understand the physiological and biochemical states by its "metabolome profile". Especially, it is of important theoretical significance and application value in studies of toxicology, diagnosis, traditional Chinese medicine and plants including natural medicines. Metabonomics will extend research ideas on material basis of the traditional Chinese medicine compounds.

Dai M.,Shenzhen University | Wang P.,University of Sydney | Zhang S.,Shenzhen University | Chen B.,Shenzhen University | And 3 more authors.
Transactions on Emerging Telecommunications Technologies | Year: 2014

Cooperative communication has the potential of providing better throughput and reliability to wireless systems when compared with direct communication. To realise the potential gain, it is important to design cooperative strategies for some representative scenarios. This survey deals with three basic wireless relay channels, namely, the parallel relay channel, the multiple-access relay channel and the broadcast relay channel. For the first channel, which models a single unicast connection, various forwarding strategies are studied. For the second and third channels, which model, respectively, the uplink and downlink scenarios with multiple unicast connections; network codes that exploit the possibility of coding among the connections are studied. The common aim pertaining to the studies of all these three channels is to use the limited radio resource in the most efficient way. Beside the aforementioned conventional works, studies that have state-of-the-art assumptions for relay networks, including outdated channel state information at the transmitter, full duplex relay and practical rateless-coded cooperation, are also extensively reviewed. Copyright © 2014 John Wiley & Sons, Ltd.

Hu Y.,Northeast Forestry University | Wang S.,Northeast Forestry University | Li R.,Heilongjiang Vocational Institute of Ecological Engineering
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | Year: 2011

In order to find the reasonable logistics distribution timing and optimun material processing method, this paper starts researching various desert shrub's water ratios by kinds of processing methods on the basis of a lot of measurements, analytical and statistical work and aims at giving a reference and a feasible method to biomass generation plants, which pursue the goal of reducing generation cost and improving their market competitiveness.

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