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高锌含量铅锌氧化渣直接还原试验研究

中国有色冶金 2024年第3期53卷 57-63页

作者：欧阳坤苏飞豆志河刘永富深圳市中金岭南有色金属股份有限公司韶关冶炼厂广东韶关512000 东北大学冶金学院辽宁沈阳110819

铅锌氧化渣熔融还原是得到金属铅和锌的重要步骤,但氧化渣中锌含量升高和铅含量降低会导致熔化温度增加,使得还原工艺条件发生较大变化。本文对高锌含量铅锌渣(Zn≈25%)的还原工艺条件和渣型制度进行了研究,主要考察了还原煤量、还原温... 详细信息

铅锌氧化渣熔融还原是得到金属铅和锌的重要步骤,但氧化渣中锌含量升高和铅含量降低会导致熔化温度增加,使得还原工艺条件发生较大变化。本文对高锌含量铅锌渣(Zn≈25%)的还原工艺条件和渣型制度进行了研究,主要考察了还原煤量、还原温度、还原时间、Fe/SiO_(2)、CaO/SiO_(2)对铅锌氧化渣中Pb、Zn、Cu回收率的影响。试验结果表明,铅锌渣Pb、Zn、Cu金属回收率随着还原煤量、还原温度、还原时间的增加而增加,但过高的煤比和还原温度不利于Pb、Cu回收率的提高;铅锌渣Pb、Zn、Cu金属回收率随着Fe/SiO_(2)和CaO/SiO_(2)的增加而增加,但Fe/SiO_(2)增加至0.78,CaO/SiO_(2)增加至0.8时,继续增加Fe/SiO_(2)和CaO/SiO_(2)将降低Pb、Zn、Cu金属回收率。试验用铅锌渣的适宜还原条件为煤比1.2~1.4、还原温度1623~1673 K、还原时间90~120 min、Fe/SiO_(2)=0.78~1.17,CaO/SiO_(2)=0.5~0.8。在上述工艺条件下,铅锌氧化渣中Pb、Zn、Cu回收率分别可达84.01%、94.51%、85.8%以上。

关键词：铅锌混合矿高锌含量铅锌渣直接还原金属回收率还原工艺渣型制度

Thermodynamic analysis of liquid phase in situ hydrogenation of glycerol for 1,3-propanediol synthesis

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Frontiers of Chemical Science and Engineering 2011年第1期5卷 67-73页

作者： kun ouyang Yu HUANG Haoyi CHEN Tao LI Fahai CAO Dingye FANG School of Chemical Engineering East China University of Science and TechnologyShanghai 200237China

Based on the combination of the glycerol aqueous-phase reforming(APR)and catalytic hydrogenation of glycerol,a novel reaction system of liquid phase in situ hydrogenation of glycerol for the synthesis of 1,3-propanediol is proposed,in which hydrogen is produced from glycerol aqueous-phase reforming in the same *** this new system,the glycerol is the raw material of the aqueous-phase reforming reaction;the hydrogen generated from the APR of glycerol can be quickly transformed to the in situ hydrogenation of glycerol to produce 1,3-propanediol,which can improve the selectivity of hydrogen for the APR process of ***,thermodynamic calculation of the coupling processes was carried out,and standard molar enthalpies and equilibrium constants of foregoing reactions were *** above calculation results indicate that the combination process is feasible for 1,3-propanediol synthesis.

关键词： glycerol aqueous-phase reforming 1 3-propanediol in-situ reduction

Effects of Interaction between Axial and Radial Secondary Air and Reductive Intensity in Reduction Region on Combustion Characteristics and NO_(x) Emission of Coal Preheated by a Self-Preheating Burner

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Journal of Thermal Science 2024年第1期33卷 249-267页

作者： SU kun DING Hongliang ouyang Ziqu ZHANG Jinyang ZHU Shujun Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China School of Energy and Power Engineering Jiangsu UniversityZhenjiang 212013China

The study focused on the effects of the interaction between axial and radial secondary air and the reductive intensity in reduction region on combustion characteristics and NO_(x) emission in a 30 kW preheating combustion *** results revealed that the interaction and reductive intensity influenced the combustion in the down-fired combustor(DFC) and NO_(x) emission *** the temperature distribution,the interaction caused the position of the main combustion region to shift down as R_(2-12)(ratio of axial secondary air flow to radial secondary air flow) decreased or λ_(2)(total secondary air ratio) increased,and there was the interplay between both of their *** R_(3-12)(ratio of first-staged tertiary air flow to second-staged tertiary air flow)increased,the decrease in the reductive intensity also caused the above phenomenon,and the peak temperature increased in this *** the NO_(x) emission,the interaction affected the NO_(x) reduction adversely when λ_(2) or R_(2-12) was higher,and the range of this effect was larger,so that the NO_x emission increased obviously as they *** decrease in the reductive intensity caused the NO_(x) emission increased under the homogeneous reduction mechanism,while was unchanged at a high level under the heterogeneous reduction *** the combustion efficiency,the interaction improved the combustion efficiency as λ_(2) increased when R_(2-12) was lower,while reduced it as λ_(2) increased excessively when R_(2-12) was *** proper decrease in the reductive intensity caused the combustion efficiency increased obviously,while was hardly improved further when the intensity decreased *** this study,the lowest NO_(x) emission was only 41.75 mg/m^(3) without sacrificing the combustion efficiency by optimizing the interaction and reductive intensity.

关键词： self-preheating interaction of axial and radial secondary air reductive intensity combustion characteristic NO_(x)emission

饲粮中添加凉茶渣对白羽肉鸡生长性能、血清生化及肠道免疫指标的影响

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中国兽医学报 2024年第7期44卷 1534-1544页

作者：郭玥欧阳坤刘彬陈碧兰罗君谊孙加节习欠云张永亮陈婷华南农业大学动物科学学院广东省动物营养调控重点实验室/国家生猪种业工程中心/猪禽种业全国重点实验室

旨在研究饲粮中添加王老吉凉茶渣对白羽肉鸡生长性能、血清指标和肠道免疫指标的影响。选取1日龄体质量相近、健康状态良好的817白羽肉杂鸡280只，随机分为4组，每组5个重复，每个重复14只。Ⅰ组为对照组，饲喂基础饲粮，Ⅱ、Ⅲ、Ⅳ组... 详细信息

旨在研究饲粮中添加王老吉凉茶渣对白羽肉鸡生长性能、血清指标和肠道免疫指标的影响。选取1日龄体质量相近、健康状态良好的817白羽肉杂鸡280只，随机分为4组，每组5个重复，每个重复14只。Ⅰ组为对照组，饲喂基础饲粮，Ⅱ、Ⅲ、Ⅳ组分别在基础饲粮中添加2%、4%、6%的凉茶渣粉，试验期49 d,分1～21和22～49日龄2个阶段。结果显示：1)与Ⅰ组相比，Ⅲ组21、49日龄体质量均显著增加(P<0.05),22～49和1～49日龄的平均日采食量均显著上升(P<0.05),1～21、22～49和1～49日龄的平均日增重均显著增加(P<0.05)。2)与Ⅰ组相比，21日龄时，Ⅱ组血清总胆固醇(T-CHO)显著降低(P<0.05),Ⅱ、Ⅲ和Ⅳ组甘油三酯(TG)含量均显著减少(P<0.05),Ⅳ组低密度脂蛋白胆固醇(LDL-C)含量和谷草转氨酶(AST)活性均降低(P<0.05);49日龄时，Ⅱ组AST活性、Ⅲ组T-CHO含量和Ⅳ组LDL-C含量均降低(P<0.05),Ⅲ和Ⅳ组高密度脂蛋白胆固醇(HDL-C)含量均升高(P<0.05),谷丙转氨酶(ALT)活性均降低(P<0.05)。3)在十二指肠中，与Ⅰ组相比，21日龄时，Ⅱ组的TNF-α表达显著降低(P<0.05),49日龄时，Ⅱ组的IL-10表达升高(P<0.05),Ⅲ、Ⅳ组的IL-2表达显著降低(P<0.05);在空肠中，与Ⅰ组相比，49日龄时，Ⅱ组IL-10的表达上升(P<0.05),Ⅲ、Ⅳ组的IL-2表达显著降低(P<0.05)。结果表明，饲粮中添加凉茶渣在不影响白羽肉鸡正常生长性能的基础上，可调节血脂水平，同时增强肠道免疫。在本试验条件下，饲粮中添加2%～4%的凉茶渣效果较好。

关键词：凉茶渣白羽肉鸡生长性能血清指标肠道免疫指标

Polyphenol-based hydrogels: Pyramid evolution from crosslinked structures to biomedical applications and the reverse design

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Bioactive Materials 2022年第11期7卷 49-70页

作者： Zimu Li Zhidong Chen Hongzhong Chen Kebing Chen Wei Tao Xiao-kun ouyang Lin Mei Xiaowei Zeng Institute of Pharmaceutics School of Pharmaceutical Sciences(Shenzhen)Sun Yat-sen UniversityShenzhen518107China Department of Spine Surgery Center for Orthopaedic SurgeryThe Sixth Affiliated Hospital of Sun Yat-sen UniversityGuangzhou510655China Center for Nanomedicine Brigham and Women’s HospitalHarvard Medical SchoolBostonMA02115United States School of Food and Pharmacy Zhejiang Ocean UniversityZhoushan316022China

As a kind of nature-derived bioactive materials, polyphenol-based hydrogels possess many unique and outstanding properties such as adhesion, toughness, and self-healing due to their specific crosslinking structures, which have been widely used in biomedical fields including wound healing, antitumor, treatment of motor system injury, digestive system disease, oculopathy, and bioelectronics. In this review, starting with the classi-fication of common polyphenol-based hydrogels, the pyramid evolution process of polyphenol-based hydrogels from crosslinking structures to derived properties and then to biomedical applications is elaborated, as well as the efficient reverse design considerations of polyphenol-based hydrogel systems are proposed. Finally, the existing problems and development prospects of these hydrogel materials are discussed. It is hoped that the unique perspective of the review can promote further innovation and breakthroughs of polyphenol-based hydrogels in the future.

关键词： Biomaterials Adhesive hydrogels Polyphenol Disease treatment Reverse design

复合改性SBA-15的制备及其在含吡啶农药废水处理中的应用研究

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湖南有色金属 2024年第3期40卷 103-108页

作者：陈焕宇邓嫔胡遥胡涛王兵欧阳坤袁翠玉湖南有色金属研究院有限责任公司湖南长沙410100 昆明理工大学云南昆明650500

文章以某农药厂生产废水为研究对象,针对其特征污染物吡啶和4-氨基吡啶,开展了吸附处理试验研究。对比了三种常见的吸附材料,确定了SBA-15为最优吸附材料,并进一步对其改性制备得到Fe-Ni/C@SBA-15吸附材料。结果显示,改性材料对农药废... 详细信息

文章以某农药厂生产废水为研究对象,针对其特征污染物吡啶和4-氨基吡啶,开展了吸附处理试验研究。对比了三种常见的吸附材料,确定了SBA-15为最优吸附材料,并进一步对其改性制备得到Fe-Ni/C@SBA-15吸附材料。结果显示,改性材料对农药废水中吡啶和4-氨基吡啶的最大吸附量分别为34.24 mg/g和240.40 mg/g。试验表明,吸附过程最优pH值为7,在室温下进行即可。吸附材料再生试验表明,经过3次重复试验,吸附容量为初始容量的80%左右,表明其具有一定的再生性能并可循环利用。

关键词：农药废水吡啶 4-氨基吡啶吸附材料

Isolation and sequence analysis of a Dof protein gene(PtDof1) in Populus

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Forestry Studies in China 2009年第2期11卷 93-98页

作者： XIN Bei CHEN Xiao-yang ouyang kun-xi PIAN Rui-qi LI Wei Key Laboratory for Genetics and Breeding of Forest Trees and Ornamental Plants of Ministry of Education Beijing Forestry University Beijing 100083 P. R. China College of Forestry South China Agricultural University Guangzhou 200064 P. R. China

Both cDNA and DNA clones of PtDof1 （GenBank Accession No. FJ402844 and FJ402845） were isolated from plants grown in tissue culture ofPopulus tornentosa. The DNA sequence is 1597 bp including two exons and one intron. The cDNA is 969 bp in length with a 765 bp open reading frame which is capable of encoding 255 amino acids. The deduced amino acids sequence of the PtDofl protein shares 65%, 56% and 55% identity with Vitis vinifera （CAO48618）, Nicotiana tabacum （CAA08755） and Glycine max （ABI 16022） Dof protein by blast analysis in GenBank. Phylogenic analysis suggests PtDof1 gene could belong to the Dofgene family. PtDofl protein contains an unusual conserved single zinc finger with the pattern of C-X2-C-X21-C-X2-C, which may play a functional role in tissue-specific expression and possibly the auxin response of endogenous plant genes.

关键词： Populus tomentosa Dof gene family PtDof1 cloning and sequencing

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木薯在家禽饲粮中应用的研究进展

饲料研究 2024年第8期47卷 161-164页

作者：郭琪琪魏立民刘宇航吴蔚欧阳坤薛琛璐孙瑞萍刘圈炜海南省农业科学院三亚研究院(海南省实验动物研究中心) 海南三亚572025 新疆农业大学动物医学学院新疆乌鲁木齐830052 海南省农业科学院畜牧兽医研究所海南省热带动物繁育与疫病研究重点实验室海南海口571100

随着我国集约化家禽养殖业的迅速发展,家禽饲料原料的需求量迅速增加。但谷物饲料的短缺及持续居高的价格使家禽饲料生产行业亟须探寻更为廉价的能量替代饲料。木薯具有产量高、富含淀粉和纤维、能值较高等特点,在家禽养殖中可替代玉米... 详细信息

随着我国集约化家禽养殖业的迅速发展,家禽饲料原料的需求量迅速增加。但谷物饲料的短缺及持续居高的价格使家禽饲料生产行业亟须探寻更为廉价的能量替代饲料。木薯具有产量高、富含淀粉和纤维、能值较高等特点,在家禽养殖中可替代玉米或其他能量饲料。木薯产品的有效利用已被证明可降低家禽生产中的饲料成本。但木薯的利用受许多因素的限制,如低蛋白质以及抗营养因子,使用正确的加工及科学的配方可以提高木薯在家禽饲粮中的添加水平。文章综述木薯的营养特性、饲料化利用方式及在家禽饲粮中的应用研究,为木薯在家禽饲粮中的应用提供参考。

关键词：木薯营养特性家禽饲粮

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Cloning of XET gene from Anthocephalus chinensis and its plant expression vector construction

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Forestry Studies in China 2010年第2期12卷 79-84页

作者： MA Sheng-jun ZHU Song-lin LI Wei ouyang kun-xi LI Na CHEN Xiao-yang Key Laboratory for Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education National Engineering Laboratory for Forest Tree Breeding Beijing Forestry University Beijing 100083 P. R. China State-owned Forest Administration of Lvliangshan Mountain Linfen 041000 P. R. China Forestry Research Institute of Hebei Province Shijiazhuang 050061 P. R. China College of Forestry South China Agricultural University Guangzhou 200064 P. R. China

A full-length cDNA sequence of xyloglucan endotransglycosylase gene （XET）, abundantly expressed in the cambium of Anthocephalus chinensis was cloned by conserved PCR, rapid-amplification of cDNA ends and by chromosome walking. Analytical results of the DNA sequence show that a 912 bp complete open reading frame （ORF） encoded a 303-amino acid protein was in the 1205 bp full cDNA sequence. The deduced amino acid sequence of AcXET, which contained the conserved specific EIDFE catalytic site sequence to XETs was homologous to the other known XET proteins. In order to study the gene function of AcXET and obtain transgenic plants, a plant expression vector pBIAcXET was constructed by recombinating the AcXET fragment from the cloning vector pMD19AcXET and the binary vector pBI121 between the XbaI and SmaI sites. The fragment ofAcXET gene was inserted between the CaMV 35S promotor and the coding region of the GUS gene in pBI121. The identification results show that the plant expression binary vector pBIAcXET was constructed successfully. These results lay the foundation for studying the molecular mechanism ofAcXET gene during wood formation.

关键词： cDNA cloning sequence analysis AcXET gene plant expression vector