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| 1 | Effect of Fouling Organisms on Food Uptake and Nutrient Release of Scallop (Chlamys nobilis, Reeve) Cultured in Daya Bay显示文摘Biofouling is an important factor that affects the bivalve farming industry. Fouling organisms may reduce growth and survival rate of the cultured species. Fouler are often filter feeders, so they are potential competitors for food resource with the cul- tured species. The present study was conducted to measure the impact of fouling on food uptake and nutrient release in April and June, 2006 in Daya Bay near Guangzhou, China. Results showed that fouling organisms had significant effect on food uptake and nutrient release. The chlorophyll a uptake rate of fouled scallops was 7.53 Lh-1 ± 1.416 Lh-1 and 11.94 Lh-1± 2.497 Lh-1 in April and June, respectively, significantly higher than those of cleaned scallops, i.e., 4.23 Lh-1 ± 2.744 Lh-1 and 2.57 Lh-1 ± 1.832 Lh-1 respectively. The consumption of total particulate matter by fouled scallops in April and June was 5.52 Lh-1 ± 0.818 Lh-1 and 3.07 Lh-1 ± 0.971 Lh-1, respectively; the corresponding results for cleaned scallops are 2.49 Lh-1 ± 0.614 Lh-1 and 2.37 ± 1.214 Lh-1, respectively. Fouling in- creased ammonia release significantly. The ammonia release rate of fouled scallops was 33.81 Lh-1±7.699 Lh-1 and 76.39 Lh-1 ± 9.251 Lh-1 in April and June, while cleaned scallops released 2.46 Lh-1 ± 0.511 Lh-1 and 7.23 Lh-1 ± 1.026 Lh-1 ammonia, respectively. Phos- phate release of fouled scallops was 22.72 Lh-1 ± 9.978 Lh-1 in June and cleaned scallops released phosphate 6.01 Lh-1 ± 0.876 Lh-1 in April. Therefore, fouling contributed much to food reduction and concentration increase of ammonia and phosphate in water. | SU Zhenxia XIAO Hui YAN Yan HUANG Liangmin | 2008 | Journal of Ocean University of China2008，7，1： | 3 |
| 2 | In Vitro Anti- bacterial Effect of Chinese Herbal Medicine against Aeromonas hydrophila 显示文摘 | Zhenxia Su Hui Xiao Liehuan Chen | 2012 | Information Technology and Agricultural Engineering2012，，134： | 1 |
| 3 | The effect of different substrates on pearl oyster Pinctada martensii(Dunker) larvae settlement 显示文摘 | Su Zhenxia Huang Liangmin Yan Yan | 2007 | Aquaculture2007，271，： | 1 |
| 4 | Research of Wavelet Modulation for Single-Phase Three-Level Inverter显示文摘The single-phase three-level voltage source inverter based on wavelet modulation(WM) is proposed.The WM technique is based on constructing a nondyadic-type multi-resolution analysis(MRA),which supports sampling continuous-time sinusoidal signals in a nonuniform recurrent manner,and then reconstructing it by using inverter switching actions. In order to further improve the output voltage waveform and reduce harmonic distortion,the wavelet modulation is used to three-level inverter. The high magnitude of fundamental component and significantly reduced harmonic contents of the inverter output voltage can be achieved by using WM in the single-phase three-level voltage source inverter. Furthermore,the WM algorithm is implemented by using only one element government(EV) in DSP. The simulated and experimental results prove the accuracy and feasibility of the WM scheme for single-phase three-level voltage source inverter. | Hongchen Liu Guolei Fan Zhenxia Su | 2017 | Journal of Harbin Institute of Technology(New Series)2017，24，1： | 0 |
| 5 | Cellular Spacing Selection of Cu-Mn Alloy under Ultrahigh Temperature Gradient and Rapid Solidification Condition显示文摘Cellular spacing selection of Cu-27.3 wt pct Mn alloy has been investigated by laser surface rapid resolidification experiments. The experimental results show that there exists a wide distribution range in cellular spacing under ultra-high temperature gradient and rapid solidification conditions and the average spacing decrease with increase of the growth rate. The experimental results are compared with the current KGT model for rapid cellular/dendritic growth, and a reasonable agreement is found. | Sen YANG Yunpeng SU Zhenxia LIU Weidong HUANG and Yaohe ZHOU State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China | 2001 | Journal of Materials Science & Technology2001，17，1： | 0 |
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