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Oxalis corymbosa is an important medicinal and edible perennial herb widely distributed throughout the world. The aim of this study was to evaluate the phenolic contents and antioxidant activities of O. corymbosa in different plant parts and seasons. We found that different parts of the plant could be sorted in the following order, shoots > leaves > stems in terms of total phenolic content (TPC) and total flavonoid content (TFC) in four seasons. The highest TPC and TFC appear in shoots during winter, which were 76.63 ± 4.32 mg GAE/g and 71.22 ± 3.61 mg RE/g, respectively. Notably, 2, 2-diphenyl-1-picryl-hydrazine (DPPH) and ferric reducing antioxidant power (FRAP) were also different among different parts in four seasons, specifically, in the order of shoots > leaves > stems. And the supreme antioxidant activities [(the half maximal inhibitory concentration (IC50)] of DPPH and FRAP were 0.07 ± 0.00 mg/mL and 0.08 ± 0.00 mg/mL in shoots, respectively. We found that a good antioxidant potential of neutralization OH radical was higher in shoots and stems, with IC50 of 2.89 mg/mL and 2.59 mg/mL on average, respectively. In addition, the highest protection factor using the Rancimat method was 1.43 ± 0.01 in leaves. To the best of our knowledge, we are the first to report such finding in the extracts of Oxalidaceae. Moreover, a strong correlation between TPC, TFC and antioxidant activities was found, which indicated that phenolic compounds were the main components responsible for the antioxidant behavior of O. corymbosa. Consequently, we conclude that the shoots of O. corymbosa may have good oxidation resistance during winter due to its high TPC and TFC. This study demonstrates that O. corymbosa possessed potent antioxidant properties, and could be a valuable natural source of antioxidants used in both medicinal and food industries.

The paper has studied the impact of interference traffic on transmission performance in IEEE 802.16 Mesh network. A new routing algorithm based on minimum interference traffic is proposed. Based on the routing tree a corresponding collision-free scheduling procedure is discussed. Because the impact of interference traffic can be controlled effectively, the system throughput has improved greatly. Simulation results show the effectiveness of the proposed algorithm.

In recent years, due to the scarcity of non-renewable resources, many researchers started to pay more attention to the exploitation of new energy plants and plant biomass as a renewable resource. Salt-tolerant and high-oil plants which can grow well on large areas of saline and alkaline land, such as coastal land, are becoming potential energy resources, since it is not possible to grow energy plants on limited fertile soil land. For instance, the mangrove and many associated plants, which are important in coastal ecosystems, could be considered as potential candidates as energy plants. The application of mangrove as energy plants is very feasible and promising. In this paper, we summarized the investigation of the typical salt-tolerant plants–mangroves and mangrove associates to demonstrate their capacity to become the resources of biomass energy.