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Phosphate removal from wastewater by model-La(Ⅲ)zeolite adsorbents

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Journal of Environmental Sciences 2008年第6期20卷 670-674页

作者： NING Ping BART Hans-Jorg li Bing LU xiwu ZHANG Yong Department of Environmental Science and Engineering Kunming University of Science and Technology Kunming 650093 China Lehrsmhl für Thermische Verfahrenstechnik TU Kaiserslautern D-67653 Kaiserslautern Germany Department of Environmental Engineering Southeast University Nanjing 210096 China

Phosphorus is one of the primary nutrients which leads to eutrophication and accelerates aging process in enclosed water bodies. Because of the poor phosphorus selectivity of other adsorbents, the novel La（Ⅲ）-modified zeolite adsorbent （LZA） was prepared by modifying 90 nm zeolite with lanthanide to selectively remove phosphate in the presence of various omnipresent anions, such as sulfates, bicarbonates, and chlorides. Through batch and fixed bed operation, the following optimum conditions were obtained： concentration of lanthanum chloride solution 0.05 mol/L; solid/liquor ratio 1/25; pH 10; calcination temperature 550℃; time 1 h. The value of the Freundlich model constants Kf and 1/n were found to be 16.76 mg/L and 0.2209, respectively. In addition, when calculated at pH 6.0, distribution coefficient KD could be as high as 36.6. Furthermore, in the alkaline pH range, solution of 0.8 mol/L NaCl was used to regenerate the saturated LZA, which could reach the high regeneration efficiency as high as 100%. Because of the good selectivity and regenerability of LZA, it might serve as a potential way for advanced phosphate removal from the sewage containing other anions.

关键词： phosphate adsorption zeolite regeneration distribution coefficient

High Quality Zinc Sulfide Epitaxial Layers Grown by Metalorganic Chemical Vapour Deposition

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Rare Metals 1989年第2期9卷 37-42页

作者： Fan, Guanghan liao, Qiwei Fan, xiwu Zhang, Zhishun li, Mei Zhang, Jiying Changchun Inst of Physics China

ZnS films were successfully grown by metallorganic chemical vapour deposition (MOCVD) at atmospheric pressure on (100) GaAs substrates. The deposition was carried out at a substrate temperature between 280 approximately 550°C with optimisation of reactor design and growth conditions. The gas phase prereaction is effectively restrained. These epilayers exhibit high crystallographic quality and reveal a mirror surface morphology. The peak halfwidths of X-ray diffraction patterns from their (400) faces are within 0.06 approximately 0.09°. The epilayers grown on (111) GaAs, (112¯0) Al2O3 and (100) Si have proven to be single crystalline feature. The optical and electrical characteristics of ZnS epilayers are measured by photoluminescence, cathodeluminescence, and the Van der Pauw method. The results indicate that there are not a large number of deep centers that could be detected both at 77K and at room temperature. A broad CL peak around 2.897eV and 2.672eV was observed only under very strong excitation. Their origin has not been examined. All epilayers present high resistivities up to 1013Ω·cm.

关键词： Crystals Epitaxial Growth Optical Properties Measurements Organometallics Chemical Vapor Deposition Semiconducting Gallium Arsenide Substrates Semiconducting Zinc Compounds

Exploration of the Existence Forms and Patterns of Dissolved Oxygen Molecules in Water

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Nano-Micro Letters 2024年第10期16卷 337-349页

作者： Hewei Yuan Yaozhong Zhang Xiaolu Huang xiwu Zhang Jinjin li Yufeng Huang Kun li Haotian Weng Yang Xu Yafei Zhang Key Laboratory of Thin Film and Microfabrication(Ministry of Education) Department of Micro/Nano ElectronicsSchool of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240People's Republic of China School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240People's Republic of China Jinduo Yuchen Water Environment Engineering Co. LtdShanghai 201702People's Republic of China

The structure of liquid water is primarily composed of three-dimensional networks of water clusters formed by hydrogen bonds,and dis-solved oxygen is one of the most important indicators for assessing water *** this work,distilled water with different concentration of dissolved oxygen were prepared,and a clear negative correlation between the size of water clus-ters and dissolved oxygen concentration was ***,a phenomenon of rapid absorption and release of oxygen at the water interfaces was unveiled,suggesting that oxygen molecules predominantly exist at the interfaces of water *** molecules can move rapidly through the interfaces among water clusters,allowing dissolved oxygen to quickly reach a saturation level at certain partial pressure of oxygen and *** exploration into the mechanism by molecular dynamics simulations of oxygen and water clusters found that oxygen molecules can only exist stably at the interfaces among water clusters.A semi-empirical formula relating the average number of water molecules in a cluster(n)to ^(17)O NMR half-peak width(W)was summarized:n=0.1 W+*** findings provide a foundation for exploring the structure and properties of water.

关键词： Water clusters Dissolved oxygen ^(17)O NMR Molecular dynamics simulation

Early Embryo and Larval Development of Inviable Intergeneric Hybrids Derived from Crassostrea angulata and Saccostrea cucullata

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Journal of Ocean University of China 2016年第3期15卷 515-522页

作者： SU Jiaqi WANG Zhaoping ZHANG Yuehuan YAN xiwu li Qiongzhen YU Ruihai Key Laboratory of Mariculture of Ministry of Education Fisheries College Ocean University of China Key Laboratory of Tropical Marine Biological Resources and Ecology South China Sea Institute of OceanologyChinese Academy of Sciences Engineering Research Center of Shellfish Culture and Breeding of liaoning Province College of Fisheries and Life Science Dalian Ocean University Key Laboratory of Mariculture Guangxi Academy of Fishery Science

To detect the intergeneric hybridization between the oyster Crassostrea angulata and Saccostrea cucullata coexisting along the southern coast of China, reciprocal crosses were conducted between the two species. Barriers for sperm recognizing, binding, penetrating the egg, and forming the pronucleus were detected by fluorescence staining. From the results, although fertilization success was observed in hybrid crosses, the overall fertilization rate was lower than that of intraspecific crosses. A large number of hybrid larvae died at 6–8 d after hatching, and those survived could not complete metamorphosis. C. angulata ♀× S. cucullata ♂ larvae had a growth rate similar to that of the maternal species, whereas S. cucullata ♀× C. angulata ♂ larvae grew the slowest among all crosses. Molecular genetics analysis revealed that hybrid progeny were amphimixis hybrids. This study demonstrated that hybrid embryos generated by crossing C. angulata and S. cucullata could develop normally to the larval state, but could not complete metamorphosis and then develop to the spat stage. Thus, there is a post-reproductive isolation between C. angulata and S. cucullata.

关键词： Crassostrea angulata Saccostrea cucullata intergeneric hybridization hybrid inviability reproductive isolation

Growth Performance of Larval and Juvenile Manila Clam(Ruditapes philippinarum) from Divergently Selected Individuals of a Full-Sib Family

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Journal of Ocean University of China 2016年第6期15卷 1046-1050页

作者： HUO Zhongming li Xiaotong SUN Qian li Yongren ZHANG Xuekai YAN xiwu YANG Feng College of Fisheries and life Science Dalian Ocean University Engineering Research Center of Shellfish Culture and Breeding in liaoning Province Dalian Ocean University School of graduates Dalian Ocean University Key Laboratory for Aquatic Ecology and Aquaculture of Tianjin Department of Fisheries Science Tianjin Agricultural University

Abstract In this study, the method of divergent selection was employed to test the larval and juvenile growth performance within a full-sib family of Manila clam Ruditapes philippinarum. The 10% largest and 10% smallest clam individuals （on the basis of shell length） of a full-sib family were selected as parents for the fast and slow growing lines, respectively. The difference in shell length was significant among the three lines （fast, control, and slow） tested. The sequence of shell length were fast line 〉 control line 〉 slow line. The responses to selection, realized heritability, and genetic gain were 0.06%-0.81%, 0.04%-0.47% and 0.58%-18.89% in the fast direction, respectively; and were 0.14%-1.27%, 0.08%-0.73%, and 0.31%-49.03% in the slow direction, respectively. The re- suits suggested that there was a large portion of additive genetic variance affecting the growth in the full-sib family. Selection in the fast direction within the full-sib family would greatly improve the growth ofR. philippinarum.

关键词： divergent selection full-sib family Manila clam

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2D70铝合金成分优化

金属世界 2009年第2期 21-24页

作者：王国军熊柏青吕新宇李锡武刘科研王强北京有色金属研究总院有色金属材料制备加工国家重点实验室北京100088 东北轻合金有限责任公司黑龙江哈尔滨150060

为优化航空器用铝合金2D70的化学成分,采用常温力学性能、硬度检测、高温性能、电导率、抗应力腐蚀等各项理化检测等研究手段,研究了Cu、Mg、Si、Fe和Ni等元素在该合金中的作用,得出了各元素在该合金中的最佳范围。试验结论是Fe、Ni含... 详细信息

为优化航空器用铝合金2D70的化学成分,采用常温力学性能、硬度检测、高温性能、电导率、抗应力腐蚀等各项理化检测等研究手段,研究了Cu、Mg、Si、Fe和Ni等元素在该合金中的作用,得出了各元素在该合金中的最佳范围。试验结论是Fe、Ni含量应控制在1.0%(wt%)左右,Si含量应作为杂质控制在0.15%～0.25%范围之间,Cu含量控制在中下限,Mg含量控制在中上限。

关键词： 2D70铝合金成分优化 Al-Cu-Mg-Fe-Ni系性能指标

Interspecific Hybridization Between Crassostrea angulata and C. ariakensis

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Journal of Ocean University of China 2015年第4期14卷 710-716页

作者： YAO Tuo ZHANG Yuehuan YAN xiwu WANG Zhaoping li Dongchun SU Jiaqi YU Ruihai Fisheries College Ocean University of China Key Laboratory of Tropical Marine Bio-resources and Ecology South China Sea Institute of Oceanology Chinese Academy of Sciences Engineering Research Center of Shellfish Culture and Breeding of liaoning Province College of Fisheries and Life Science Dalian Ocean University

lnterspecific hybridization can generate heterosis, which is proven to be a useful tool in selective breeding programs for oyster culture. Crassostrea angulata and C. ariakensis are two important economic shellfish species in China. We conducted 2 × 2 reciprocal crosses to determine whether these two species can cross-fertilize and their hybrids can hatch, survive and perform hetero- sis. Fertilization was found symmetrical without delay. The rate of fertilization success of C. angulata ♀× C. ariakensis ♂ was lower than that of C. ariakensis ♀ x C. angulata ♂, and the success rate of both hybridizations was lower than that of two intraspecific crosses each. During the planktonic period, survival rate of the progeny was lower in the hybrid crosses than in the intraspecific crosses. On day 360, mean shell height of the progeny of C. angulata ♀ x C. angulata ♂ was highest, which was followed by that of C. angulata ♀ × C. ariakensis ♂, C. ariakensis ♀x C. ariakensis ♂ and C. ariakensis ♀× C. angulata ♂ in a descending order. Mor- phology of adults produced by the hybrid crosses was similar to that of C. angulata. Both hybrids underwent normal gonad devel- opment and produced mature gametes in the mating season. This study provided new insights into the quantitative traits in interspeci- fic crosses of Crassostrea species, thus being of guidance value for selective breeding of oyster.

关键词： Crassostrea angulata Crassostrea ariakensis interspecific hybridization gonad development heterosis

Loss of ARID1A Promotes Hepatocellular Carcinoma Progression via Up-regulation of MYC Transcription

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Journal of Clinical and Translational Hepatology 2021年第4期9卷 528-536页

作者： Yao Xiao Guodong liu xiwu Ouyang Denggao Zai Jixiang Zhou Xiaoli li Qi Zhang Jie Zhao Department of General Surgery Xiangya HospitalCentral South UniversityChangshaHunanChina National Clinical Research Center for Geriatric Disorders Xiangya HospitalCentral South UniversityChangshaHunanChina International Joint Research Center of Minimally Invasive Endoscopic Technology Equipment&Standards ChangshaHunanChina Department of General Surgery Sir Run Run Shaw HospitalSchool of MedicineZhejiang UniversityHangzhouZhejiangChina

Background and Aims:AT-rich interactive domain-containing protein 1A(ARID1A)is frequently mutated or deficient in hepatocellular carcinoma(HCC).However,the role of ARID1A in HCC remains ***,the biological role of ARID1A in HCC was evaluated and a potential mechanism was ***:Arid1a was knocked out in the livers of mice using the CRISPR/Cas9 system delivered by hydrodynamic tail vein *** development of HCC was observed in different mouse *** correlation of ARID1A and prognosis in patients with HCC was analyzed using *** effect of ARID1A on cell proliferation was assessed by MTT assay following the manipulation of candidate ***:ARID1A deficiency alone did not cause HCC in mice,but knockout of ARID1A accelerated liver tumorigenesis in response to diethylnitrosamine(DEN)or when a combination knockout of phosphatase and tensin homolog(Pten)plus tumor protein P53(p53)was ***1A mutations were associated with a poorer prognosis in HCC *** mRNA level of MYC was significantly higher in patients with an ARID1A mutation compared to those without a *** expression of ARID1A inhibited HCC cell ***1A knockout increased HCC cell growth and resulted in disruptions to DNA damage repair and apoptosis following radiation ***,mechanistic studies revealed that ARID1A inhibited the proliferation of HCC cells via transcriptional down-regulation of ***:These results describe ARID1A as a tumor suppressor in the liver.A deficiency in ARID1A predicts worse survival in HCC patients and promotes HCC progression via up-regulation of MYC transcription.

关键词： ARID1A Hepatocellular carcinoma MYC

Effect of Substrate Component on the Growth and Survival of Juvenile Sunray Surf Clam(Mactra chinensis Philippi)

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Journal of Ocean University of China 2016年第4期15卷 676-680页

作者： ZHANG Xuekai li Zhuang HUO Zhongming YAN xiwu YANG Feng liU Hui ZHANG Xingzhi Provincial Engineering Research Center of Shellfish Culture and Breeding of liaoning Key Laboratory of Mariculture and Stock Enhancement in North China's Sea of Ministry of Agriculture College of Fisheries and Life ScienceDalian Ocean University Dalian 116023 P. R. China

Substrate is a critical environmental factor affecting the activity of bivalves. To examine the effect of the substrate component on the growth and survival of juvenile sunray surf clam(Mactra chinensis Philippi), a series of short-term experiments were conducted using a variety of substrates with different ratios of sand to mud. The experimental group cultured without substrate showed poor survival, with all juveniles died after day 20. The juveniles cultured in mud without sand showed a lower survival rate(25.54% ± 0.40% on day 45) than those in other groups. The juveniles cultured in sand without mud, or the mixtures of sand and mud with a ratio of 1:1 and 2:1, respectively, exhibited modest survival at day 45. Maximal weight gain rate(WGR), shell length growth rate(LGR), and specific growth rate(SGR) were observed when the sand concentration was 61.97%, 77.69%, and 64.64%, respectively. As the fast growth and high survival were observed when the sand to mud ratio was 1:1(50% sand) and 2:1(67% sand), a sand concentration of more than 50% is optimal. The optimal concentration of sand in the substrate for rearing juvenile sunray surf clams was 67% which resulted in the fastest growth and highest survival. These results can be used to developing a nursery/farming technique of improving the yield of sunray surf clams.

关键词： juvenile Substrate cultured larvae modest fastest farming length affecting Meretrix