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Life Cycle Assessment of Internal Recycling Options of Steel Slag in Chinese Iron and Steel Industry

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Journal of Iron and Steel Research International 2011年第7期18卷 33-40页

作者： chen Bo YANG jian-xin OUYANG Zhi-yun State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of Sciences Beijing 100085 China

The internal recycling process of BOF slag which is one of the huge solid wastes from iron and steel indus try was emphasized. Based on the four scenarios of different internal recycling strategies for BOF slag, life cycle assessment （LCA） as a valuable tool for industrial solid waste management was applied to analyze the contribution to reducing environmental impacts and resources burdens for each scenario. The global warming potential （GWP） re- sults of the four scenarios show that the scenario which performs best in carbon reduction cuts off 14.2G of GWP impacts of the worst scenario. The results of this study show that the optimized internal recycling process of BOF slag can improve the environmental performance of crude steel. It is important to assess and choose an appropriate strategy to recycle BOF slag from LCA perspective to reduce the environmental impacts and resource burdens as much as possible.

关键词： life cycle assessment sustainable development close-loop recycling steel BOF slag

Effects of Consecutively Monocultured Rehmannia glutinosa *** Diversity of Fungal Community in Rhizospheric Soil

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Agricultural Sciences in China 2011年第9期10卷 1374-1384页

作者： ZHANG Zhong-yi LIN Wen-xiong YANG Yan-hui chen Hui chen xin-jian Engineering Research Center of Chinese Medicinal Materials Henan Agricultural University Zhengzhou 450002 P.R.China Institute of Agroecology Fujian Agriculture and Forestry University Fuzhou 350002 P.R. China

Continuous monoculture problems, or replanting diseases, are one of the key factors affecting productivity and quality of Chinese medicinal plants. The underlying mechanism is still being explored. Most of the studies on continuous monoculture ofRehmannia glutinosa L. are focused on plant nutritional physiology, root exudate, and its autotoxieity. However, the changes in the diversity of microflora in the rhizosphere mediated by the continuous monoculture pattern have been remained unknown. In this study, terminal restriction fragment length polymorphism （T-RFLP） technique was used for fingerprinting fungal diversity in the rhizosphere soil sampled from the fields ofR. glutinosa monocultured for 1 and 2 yr. The results showed that the structure of fungal community in consecutively moncultured rhizosphere soil was different from that in control soil （no cropping soil）, and varied with the consecutive monoeulture years （1 and 2 yr）. The comprehensive evaluation index （D） of fungal community estimated by principal component analysis of fragment number, peak area, Shannon-Weiner index, and Margalef index was higher in 1 yr monoculture soil than that in 2 yr monoculture soil, suggesting that consecutive monoculture of R. glutinosa could be a causative agent to decrease the diversity of fungal community in the rhizosphere soil.

关键词： biodiversity consecutive monoculture problem fungal community Rehmannia glutinosa rhizosphere soil T-RFLP

Investigation of Hole Mobility in GaInP/(In) GaAs/GaAs p-Type Modulation Doped Heterostructures

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Chinese Physics Letters 1999年第1期16卷 50-52页

作者： YANG Quan-kui LI Ai-zhen chen jian-xin State Key Laboratory of Functional Materials for Informatics Shanghai Institute of MetallurgyChinese Academy of SciencesShanghai 200050

Ga_(0.51)In_(0.49)P/(In)GaAs/GaAs heterostructure is regarded as an excellent candidate for two dimensional hole gas system as it has a large valence band offset *** this paper,we report the hole mobility in GaInP/GaAs and GaInP/In_(0.20)G_(0.80)As/GaAs p-type modulation doped heterostructures grown by gas source molecular beam epitaxy with different p-channels and doping *** influences of Be:GaAs cap layer,δ-doping,and strained InGaAs p-channel on hole mobility are discussed,and qualitatively explained by the ionized impurity scattering ***,it was shown that the improvement of hole mobility could be achieved by the δ-doping method combined with strained InGaAs channel.

关键词： GaAs/Ga scattering mobility

Study on Plant Regeneration of Wheat Mature Embryos Under Endosperm-Supported Culture

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Agricultural Sciences in China 2006年第8期5卷 572-578页

作者： chen Jun-ying YUE Run-qing XU Hai-xian chen xin-jian Department of Agronomy Henan Agricultural University Zhengzhou 450002 P.R.China

To reveal the suitability of using mature embryos as an explant source in wheat tissue culture, mature embryos from eight common wheat cultivars （Triticum aestivum L. cv.） were cultured with or without endosperm to test their efficiency of callus induction and plant regeneration. When embryos were cultured together with endosperm （endosperm-supported culture, ES）, the percentage of callus induction was significantly lower than that when embryos were cultured in the absence of endosperm （non-endosperm-supported culture, NES）. This pattern was evident in most genotypes, regardless of whether 2 or 8 mg L^-1 2,4-D was added in the NES culture. However, in ES culture, more induced calli were differentiated into distinct green spots and they further developed into plantlets. Thus, more plants were regenerated in ES culture than in the NES treatment. Most of the eight tested genotypes showed a significant difference in callus induction rate and plantlet regeneration in both ES and NES cultures. In addition, the enzymatic activity of oxalate oxidase in the callus of ES culture condition was obviously higher than that in the callus of NES culture condition, suggesting that the activity of oxalate oxidase may be a parameter for selection of calli with potential for plantlet regeneration. These results indicate that wheat mature embryos are valuable explants for highly efficient callus induction and plant regeneration, if proper treatment and medium are used.

关键词： mature wheat embryo tissue culture endosperm-supported plant regeneration oxalate oxidase activity

High Current Gain In_(0.49)Ga_(0.51)P/GaAs Heterojunction Bipolar Transistors with Double Spacers Grown by Gas Source Molecular Beam Epitaxy

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Chinese Physics Letters 2000年第12期17卷 915-917页

作者： chen Xiao-Jie chen jian-xin chen Yi-Qiao PENG Peng YANG Quan-Kui LI Ai-Zhen State Key Laboratory of Functional Materials for Informatics Shanghai Institute of MetallurgyChinese Academy of SciencesShanghai 200050

This paper reports the improved performance of the lattice-matched N-p^(+)-n In_(0.49)Ga_(0.51)P/GaAs heterojunction bipolar transistors(HBTs)with undoped spacers grown by the gas source molecular beam epitaxy.A 600ÅGaAs base doped with beryllium at 3 × 1019cm^(-3) and a 1000Å In_(0.49)Ga_(0.51)P emitter doped with silicon at 3 × 1017cm^(-3) have been *** both sides of the base,the 50Åundoped GaAs spacers were *** with emitter area of 100× 100μm^(2) were fabricated by using selective wet chemical etching *** measured results of HBTs reveal cood junction characteristics,and the common-emitter current gain reaches 320 at the collector current density of 280 A/cm^(2).

关键词： technique. emitter heterojunction

InAlAs/InGaAs Quantum Well Infrared Photodetectors with 3-5μm Band Grown by Gas Source Molecular Beam Epitaxy

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Chinese Physics Letters 1997年第6期14卷 443-445页

作者： ZHANG Yong-gang LI Ai-zhen chen jian-xin REN Yao-cheng State Key Laboratory of FUnctional Materials for Informatics Shanghai Institute of MetallurgyChinese Academy of SciencesShanghai 200050

The relationship between well width and subband energy as well as response wavelength of the InAlAs/InGaAs multi-quantum well structures have been calculated for the design of the devices by using Kronig-Penney *** using gas source molecular beam epitaxy grown InAlAs/InGaAs quantum well infrared photodetector(QWIP)materials have been used to fabricate QWIP devices with 3-5μm band.Ⅰ-Ⅴ characteristics and response spectra of the devices have been *** show that the devices have peak response at 4.0μm with full width of half maximum of about 29.5meV.

关键词： InAlAs/InGaAs Epitaxy Infrared

Analysis of Dynamic Accumulation of Three Types of Glutenin Subunits and Their Content in Relation to Sedimentation Value in Common Wheat

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Agricultural Sciences in China 2006年第2期5卷 155-160页

作者： HAO Jun-jie chen Jun-ying chen xin-jian CUI Dang-qun chenG Xi-yong College of Agronomy Henan Agricultural University Zhengzhou 450002 P.R.China Institute of Plant Protection Henan Academy of Agricultural Sciences Zhengzhou 450002 P.R. China

The biosynthetic time and accumulations of A-, B-, and C-type glutenin subunits in 7 winter wheat cultivars with different quality （strong, medium, weak gluten） were analyzed by SDS-PAGE. The results showed that no glutenin subunit was observed within 8 d after anthesis. Parts or all A-, B-, and C-type subunits appeared around day 12 in different cultivars. Other A-, B-, and C-type subunits appeared gradually. The accumulation of A-, B-, and C-type subunits fluctuated before maturity. The results of analysis of correlation between the ratios of A/T （total content of glutenin subunits）, A/C, AJ （B＋C）, （A＋B）/C, and （A＋B）/T and SDS-sedimentation value suggested that they were more significant. The negative correlation between the ratio of （B＋C）/T and SDS-sedimentation value was more significant, and the correlations between the ratio C/T and the SDS-sedimentation value were significantly negative.

关键词： wheat glutenin subunits dynamic accumulation quality

Hydrothermal Synthesis,Crystal Structure and Fluorescent Property of a Novel Mo(V) Phosphate [Zn(Mo^v_6P_4O_(31)H_(10))_2(C_4H_(14)N_3)_2]·2C_4H_(13)N_3·8H_2O

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Chinese Journal of Structural Chemistry 2006年第9期25卷 1071-1077页

作者： WEI Chun-Xia chen jian-xin ZHANG Zhi-Chun LANTing-Yan HUANG Yuan-Biao LI Zhong-Shui ZHANG Wen-Jie College of Chemistry and Materials Science Fujian Normal University Fuzhou 350007 China

A new molybdenum phosphate [Zn（Mo^v6P4O31H10）2（C4H144N3）2].2C4H13N3.8H2O 1 （C4H13N3 = diethylenetriamine） has been synthesized under hydrothermal condition. Single-crystal X-ray diffraction reveals that compound 1 crystallizes in the monoclinic, space group P21/n, a = 13.1679（3）, b = 22.1240（6）, c = 13.6146（3） A, β= 103.4847（7）°, V = 3856.95（16） A^3, C16H90N12O70P8ZnMo12, Mr = 3035.41, Z = 2, Dc = 2.614 g/cm^3, μ = 2.483 mm^-1, F（000） = 2968, S = 1.014, the final R = 0.0196 and wR = 0.0506 for 7486 observed reflections （1 〉 2σ（I））. Compound 1 consists of two identical rings of six edge-sharing MoOt, octahedra interconnected by one ZnO6 octahedron, whereas the PO4 tetrahedra which share their apices with the MoO6, octahedra are only located on one side of each Mo6, ring. The 2-charge of polyanion [Zn（Mo^v6P4O31H10）2]^2- unit is compensated in the crystal by two mono-protonated diethylenetriamines （C4H14N3）^＋. By hydrogen bonding interactions the polyanion of compound 1 is interconnected to form pseudo threedimensional molybdophosphate. Other characterizations by elemental analyses, IR spectrum and fluorescent spectrum are also described.

关键词： molybdenum(V) phosphate hydrothermal synthesis crystal structure fluorescent property

Inguinal and subinguinal micro-varicocelectomy, the optimal surgical management of varicocele： a meta-analysis

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Asian Journal of Andrology 2015年第1期17卷 74-80,I0008页

作者： Jun Wang Shu-Jie Xia Zhi-Hong Liu Le Tao Ji-Fu Ge chen-Min Xu jian-xin Qiu Department of Urology Shanghai First People's Hospital Medical College of Shanghai Jiao Tong University Shanghai China.

Conventional meta-analyses have shown inconsistent results for the efficacy of various treatments of varicoceles. Therefore, we performed a multiple-treatment meta-analysis to assess the effectiveness and safety of 10 methods of varicocelectomy and embolization/sclerotherapy. We systematically reviewed 35 randomized controlled trials and observational studies, from 1966 to August 5, 2013, which compared any of the following treatments for varococeles： laparoscopic, retroperitoneal, open inguinal and subinguinal varicocelectomy, microsurgical subinguinal and inguinal varicocelectomy, percutaneous venous embolization, Tauber antegrade sclerotherapy, retrograde sclerotherapy and expectant therapy （no treatment）. Inguinal and subinguinal microsurgery, open inguinal, laparoscopic varicocelectomy showed a significant advantage over expectant therapy in terms of pregnancy rates （odds ratio （OR）： 3.48, 2.68, 2.92 and 2.90, respectively）. Compared with retroperitoneal open surgery, inguinal microsurgery showed an improvement of sperm density （mean difference （MD）： 10.60, 95% confidence interval （Cl）： 1.92-19.60） and sperm motility （MD： 9.09, 95% Cl. 4.88-13.30）. Subinguinal and inguinal microsurgery outperformed retroperitoneal open surgery in terms of recurrence （OR： 0.05, 0.06 respectively）. Tauber antegrade sclerotherapy and subinguinal microsurgery were associated with the lowest risk of hydrocele formation. The odds of overall complication, compared with retroperitoneal open varicocelectomy, were lowest for inguinal microsurgery （OR = 0.07, 95% Ch 0.02-0.19）, followed by subinguinal microsurgery （OR = 0.09, 95% CI. 0.02-0.19）. Inguinal and subinguinal micro-varicocelectomy had the highest pregnancy rates, significant increases in sperm parameters, with low odds of complication. These results warrant additional properly conducted randomized controlled clinical studies with larger sample sizes.

关键词： meta-analysis varicocele varicocelectomy