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Precipitation transformation of rare earth sulfate into chloride with p-dodecylphenoxy carboxylic acids

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Journal of Rare Earths 2019年第12期37卷 1326-1333页

作者： Yanliang wang Jia Su Xiangguang guo jianguo Cui Yan Bai Fujian Li Xiaoqi Sun CAS Key Laboratory of Design and Assembly of Functional Nanostructures and Fujian Key Laboratory of NanomaterialsFujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China University of Chinese Academy of Sciences Beijing 100039China Baotou Research Institute of Rare Earths Baotou 014010China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Ganzhou Rare Earth Group Co. Ltd.Ganzhou 34WOOChina

Methods for transforming rare earth(RE)sulfate into chloride mainly include extraction process with organophosphonic mono-acids or aliphatic acids and precipitation process with ammonium bicarbonate(NH4 HCO3).In this paper,alkylphenoxy carboxylic acids(HAs)ofp-dodecylphenoxy acetic acid(HA-Ⅰ),pdodecylphenoxypropanoic acid(HA-Ⅱ)and p-dodecylphenoxybutyric acid(HA-Ⅲ),which were liquid at room temperature were synthesized and *** precipitation mechanisms of RE elements with the HAs were investigated and the HA/RE molar ratios of the solid complexes were determined as3:1 by equi-molar series method which accord with the principle of charge *** of HAs for the transformation of RE sulfate from concentrated sulfuric acid roasted RE concentrate into chloride via precipitation method was discussed.100%HA-Ⅱwas selected as the liquid organic precipitant without dilution of volatile solvent soracceleration of phase separation by *** RE sulfate solution can be precipitated by HA-Ⅱafter neutralization with liquid NaOH and stripped with concentrated HCl at room *** concentration of RE chloride of 218.1 g/L with low residue of sulfate radical of 0.536 g/L was *** residual organic precipitant in the raffinate solution was tested to be lower than 8 mg/L at 25℃and the chemical oxygen demand(COD)in wastewater was less than 50 mg/L.

关键词： Rare earth Dodecylphenoxycarboxylic acid Recovery Precipitation Transformation

Calcium/calmodulin modulates salt responses by binding a novel interacting protein SAMS1 in peanut(Arachis hypogaea L.)

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作物学报：英文版 2023年第1期11卷 21-32页

作者： Sha yang jianguo wang Zhaohui Tang Yan Li Jialei Zhang Feng guo Jingjing Meng Feng Cui Xinguo Li Shubo Wan Institute of Crop Germplasm Resources Shandong Academy of Agricultural SciencesJinan 250100ShandongChina Institute of Agricultural Resources and Environment Shandong Academy of Agricultural SciencesJinan 250100ShandongChina Shandong Academy of Agricultural Sciences/Shandong Provincial Key Laboratory of Crop Genetic Improvement Ecology and PhysiologyJinan 250100ShandongChina

The Ca^(2+)/CaM signal transduction pathway helps plants adapt to environmental stress. However, our knowledge on the functional proteins of C^(2+)/CaM pathway in peanut(Arachis hypogeae L.) remains limited. In the present study, a novel calmodulin 4(CaM4)-binding protein S-adenosyl-methionine synthetase 1(SAMS1) in peanut was identified using a yeast two-hybrid assay. Expression of AhSAMS1was induced by Ca^(2+), ABA, and salt stress. To elucidate the function of AhSAMS1, physiological and phenotypic analyses were performed with wild-type and transgenic materials. Overexpression of AhSAMS1increased spermidine and spermidine synthesis while decreased the contents of ethylene, thereby eliminating excessive reactive oxygen species(ROS) in transgenic lines under salt stress. AhSAMS1 reduced uptake of Na+and leakage of K+from mesophyll cells, and was less sensitive to salt stress during early seedling growth, in agreement with the induction of SOS and NHX genes Transcriptomics combined with epigenetic regulation uncovered relationships between differentially expressed genes and differentially methylated regions, which raised the salt tolerance and plants growth. Our findings support a model in which the role of AhSAMS1 in the ROS-dependent regulation of ion homeostasis was enhanced by Ca^(2+)/CaM while AhSAMS1-induced methylation was regulated by CaM, thus providing a new strategy for increasing the tolerance of plants to salt stress.

关键词： AhCaM4 AhSAMS1 Protein interaction Polyamines Salt tolerance

Quality evaluation of glutenite reservoirs of intergranular-secondary dissolution pore type using a quantitative method

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Energy Geoscience 2022年第2期3卷 126-133页

作者： Juanjuan guo Yu Huang Yanjun wang jianguo Pan Linjun Huang Northwest Branch Institute Research Institute of Petroleum Exploration&DevelopmentPetroChinaLanzhouGansu730020China

Glutenite(coarse-grained clastic)reservoirs of intergranularesecondary dissolution pore type are dominated by residual intergranular pores and secondary dissolution pores,and characterized by low porosity,low permeability,strong heterogeneity,and highly variable physical *** is difficult to conduct a quantitative quality assessment of these reservoirs while their primary control factors remain *** this paper,experimental core data and drilling,logging and seismic data are used to assess the effect of sedimentary facies on reservoir *** sedimentary facies zones are identified by analyzing the characteristics of glutenite reservoirs,which includes investigating rock components and their effects on reservoir *** matrix content and rigid particle content are identified as the primary control factors for these *** curves sensitive to reservoir quality are selected and examined to continuously characterize the physical parameters of the *** establishes a calculation model of reservoir assessment parameters through multivariate regression and determines the quantitative assessment parameter *** quality of the glutenite reservoirs is defined using conventional logging *** study also predicts the plane distribution of high-quality reservoirs through geostatistical inversion of the reservoir assessment parameters based on conventional wave impedance inversion,thus providing insight and guidance for quantitative assessment and quality prediction of glutenite reservoirs of the intergranular-secondary dissolution pore *** application of this method to well deployment based on qualitative evaluation of the glutenite reservoirs in oilfields yielded favorable results.

关键词： Glutenite Reservoir quality Reservoir assessment parameter Geostatistical simulation and inversion Mahu Sag Junggar basin

The origin of bedding-parallel fibrous calcite veins in the Lower Permian Chihsia Formation in western Hubei Province,South China

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Science Bulletin 2015年第20期60卷 1778-1786页

作者： Hao Yu Xiqiang Zhou jianguo wang Chuan guo Hengye Wei Daizhao Chen Key Laboratory of Orogenic Belts and Crustal Evolution Ministry of Education Peking University Key Laboratory of Petroleum Resources Research Institute of Geology and Geophysics Chinese Academy of Sciences College of Earth Science East China Institute of Technology

Bedding-parallel fibrous veins occurring as lenticular to flattened intercalations were found in the organic-rich marlstone/calcareous shale of the upper Lower Permian Chihsia Formation in western Hubei Province, South China. They dominantly consist of fibrous calcite crystals with smooth and tight boundaries, forming fence- like inward, syntaxial growth clusters toward the vein center along which a median suture line generally occurs. Petrographic evidence indicates that these veins may form at relatively shallow burial depth, where fluid overpres- sures would have incrementally created the bed-parallel vein space, resulting in displacive growth of fibrous calcite. On the other hand, the C, O and S isotopic data across the vein reveal slightly depleted δ13Ccarb values （-3.32 ‰ to ＋0.19‰ VPDB） and moderately depleted δSOcarb values （--9.6 ‰ to --7.3 ‰ VPDB） with respect to those of coeval seawaters and slightly heavier δ34Spyrite values （--7.88 ‰ CDT） with respect to those of ambient rocks. Stable isotope evidence consistently suggests significant contribution of bacterial sulfate reduction （BSR） to the formation of the fibrous calcite cements in the vein. The BSR could have been intensive with the availabilities of residual sulfate and abundant organic matters in the Chihsia sediments during shallow burial, increasing the alkalinity of pore waters and further promoting carbonate precipitation. Thus, the bedding-parallel fibrous calcite vein in the upper Lower Permian Chihsia Formation is an important time-specific petrographic capsule, providing clues for understanding the diagenetic process in organic- rich sediments.

关键词： Fibrous calcite vein C-O-S isotope Diagenesis Chihsia Formation

Evaluation of the weakening behavior of gas on the coal strength and its quantitative influence on the coal deformation

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International Journal of Mining Science and Technology 2021年第3期31卷 451-462页

作者： Haijun guo Kai wang Yuchen Wu Hanlu Tang jianguo Wu Lianhe Guan Chenyang Chang Chao Xu Beijing Key Laboratory for Precise Mining of Intergrown Energy and Resources China University of Mining and Technology-BeijingBeijing 100083China School of Emergency Management and Safety Engineering China University of Mining and Technology-BeijingBeijing 100083China State Key Laboratory of Coal Resources and Safe Mining China University of Mining and Technology-BeijingBeijing 100083China Kailuan(Group)Co. Ltd.Tangshan 063018China

The coal strength and deformation properties are key factors affecting safe coal mining and highefficiency coalbed methane(CBM)*** this paper,reconstituted coal samples are chosen to investigate the weakening behavior of gas on coal strength,meanwhile,its effects on coal deformation are quantitatively *** results indicate that the weakening degree of gas on coal strength is closely related to the confining stress and gas *** with non-gas-saturated coals,the maximum weakening ratios of adsorbed gas to coal strength are 10.58%,18.12%,8.55%and 14.65%under the conditions of confining stress CS=3 MPa and gas pressure GP=1 MPa,CS=3 MPa and GP=2 MPa,CS=4 MPa and GP=1 MPa,and CS=4 MPa and GP=2 MPa,***,the maximum weakening ratios of free gas to coal strength are 18.27%,36.54%,14.79%and 29.58%,respectively,under above four *** maximum coal bulk strain decreases as particle sizes of coal powders increase,and it has a maximum value of 0.0227 and a minimum value of 0.0191 in particle size ranges of 0.01–0.041 and 0.5–1 *** the same conditions,the coal bulk strain increases with increasing gas pressure,revealing that coal deformation properties can be enhanced by gas.

关键词： Gas-saturated coal Coal strength Weakening effect Coal deformation Quantitative evaluation Mechanical loading

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盐碱地花生高产栽培研究进展及面临的挑战

山东农业科学 2024年第9期56卷 142-148页

作者：高华鑫张佳蕾王建国慈敦伟杨莎唐朝辉郭峰刘珂珂万书波山东省农业科学院农作物种质资源研究所山东济南250100 山东省花生研究所山东青岛266100 山东省农业科学院山东济南250100

盐碱地是我国宝贵的后备耕地资源,进一步挖掘盐碱地作物产量是我国农业生产的重要任务。花生是我国主要的经济和油料作物,开发利用盐碱化耕地进行花生栽培促高产,对于盐碱地农业增效、农民增收和保障食用油安全意义重大。本文简述了盐... 详细信息

盐碱地是我国宝贵的后备耕地资源,进一步挖掘盐碱地作物产量是我国农业生产的重要任务。花生是我国主要的经济和油料作物,开发利用盐碱化耕地进行花生栽培促高产,对于盐碱地农业增效、农民增收和保障食用油安全意义重大。本文简述了盐碱地改良的科学原理,结合山东省农业科学院花生课题组开展的一系列试验,从花生抗盐胁迫分子调控机理、物理和化学改良措施及农艺治理措施等方面概述了盐碱地条件下缓解花生盐碱胁迫及促进高产的研究进展,并进一步指出提升盐碱地花生绿色生产所面临的挑战。本研究可为盐碱地花生绿色高效生产提供有力的理论依据与技术支撑,对于保障国家粮油安全和改善盐碱区域农业生态环境具有重要的参考意义。

关键词：花生盐碱地高产栽培产量挑战

基于生信分析放射性肺损伤核心基因及靶向中药筛选

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安徽大学学报（自然科学版） 2024年第3期48卷 102-108页

作者：李建华郭婷婷王志鹏侯彦婕秦秀军李建国中国辐射防护研究院放射医学与环境医学研究所山西太原030006 山西省中医药研究院中药方剂研究所山西太原030012

为了探索放射性肺损伤发病机制及预测潜在靶向治疗的中药,利用生物信息学方法分析放射性肺损伤与正常肺组织的表达差异基因,从GEO数据库选取GSE202586数据集,通过GEO_(2)R分析得出表达差异基因,对表达差异基因进行GO功能富集分析及KEGG... 详细信息

为了探索放射性肺损伤发病机制及预测潜在靶向治疗的中药,利用生物信息学方法分析放射性肺损伤与正常肺组织的表达差异基因,从GEO数据库选取GSE202586数据集,通过GEO_(2)R分析得出表达差异基因,对表达差异基因进行GO功能富集分析及KEGG信号通路分析,通过STRING数据库构建蛋白互作网络,利用Cytoscape获得核心基因,通过Coremine Medical预测靶向作用于核心基因的中药.结果共获得差异基因113个,其中88个基因表达上调,25个基因表达下调,主要涉及细胞过程、免疫过程及信号的调节,非跨膜蛋白酪氨酸激酶和信号受体的活性等生物过程;主要富集在免疫系统信号通路.蛋白互作分析筛选出8个核心基因包括CD19,CD22,CD52,CD86,LCP2,PAX5,SPN,TNFRSF13C.将筛选整合得到的8个核心基因通过数据库进行靶向中药的筛选,归纳总结3类相关治疗的中药,包括以赤芍、苦蘵、白花蛇钱草、白英为代表的清热解毒药,以槐角、姜黄、川牛膝为代表的凉血止血、活血化瘀药,以枳实、车前子、灵芝、野山药为代表的补气理气药.该研究利用生物信息学分析预测放射性肺损伤发生的作用机制及潜在治疗的中药,为进一步的科学研究与临床应用提供参考.

关键词：放射性肺损伤差异基因核心靶点靶向中药

Responses of rice growth to copper stress under free-air CO_2 enrichment (FACE)

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Chinese Science Bulletin 2007年第19期52卷 2636-2641页

作者： JIA HaiXia guo HongYan YIN Ying wang Qiang SUN Qin wang XiaoRong ZHU jianguo State Key Laboratory of Pollution Control and Resources Reuse School of Environment Nanjing University Nanjing 210093 China State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 China

The responses of rice to the second degree contamination of copper were studied by pot experiments under free-air CO2 enrichment (FACE) with 570 μmol·mol-1 of CO2. The results showed that the content of copper in rice leaves was reduced with the CO2 concentration reaching 570 μmol·mol-1 and this happened more significantly under the second degree contamination of copper. Under FACE, activities of superoxide dismutase (SOD) enzyme in rice leaves treated by copper contamination were induced, whereas the contents of glutathione (GSH) and glutathione disulfide (GSSG) had no significant difference from the control. In the presence of ambient CO2, activities of SOD enzyme treated by copper pollution were suppressed during the whole rice growth, however, the contents of GSH and GSSG were induced at tillering and jointing stages, and then restored to the control levels in later growth under the second degree contamination of copper. With the rice growing, the content of malondialdehyde (MDA) rises continuously, but there had been no significant difference between the treatments at the same growth stage. Further studies are needed on the response mechanism of rice to Cu stress under elevated CO2.

关键词：铜压力大米生长状态 CO2浓缩油污染

Glucocorticoid receptor–IRS-1 axis controls EMT and the metastasis of breast cancers

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Journal of Molecular Cell Biology 2019年第12期11卷 1042-1055页

作者： Weiwei Shi Dongmei wang Xinwang Yuan Yi Liu Xiaojie guo Jingsong Li jianguo Song State Key Laboratory of Cell Biology CAS Center for Excellence in Molecular Cell ScienceShanghai Institute of Biochemistry and Cell BiologyChinese Academy of SciencesUniversity of Chinese Academy of SciencesShanghai 200031China

Glucocorticoid receptor (GR) is involved in the transcriptional regulation of genes that are important for various biological functions, including tumor growth and metastatic progression. However, the cellular and biological effects of GR remain poorly understood. Here, we investigated the role of GR and its underlying mechanism in mediating breast cancer cell survival and metastasis. We observed that the GR levels were increased in drug-resistant breast cancer cells and in metastatic breast cancer samples. GR promoted tumor cell invasion and lung metastasis in vivo. The GR expression levels were negatively correlated with the survival rates of breast cancer patients. Both ectopic expression and knockdown of GR revealed that GR is a strong inducer of epithelial-to-mesenchymal transition (EMT), which is consistent with its effects on cell survival and metastasis. GR suppressed the expression of insulin receptor substrate 1 (IRS-1) by acting as an IRS-1 transcriptional repressor. In addition, GR has an opposite effect on the expression levels of IRS-2, indicating that GR is able to differentially regulate the IRS-1 and IRS-2 expression. The cellular and biological effects elicited by GR were consistent with the reduced levels of IRS-1 observed in cancer cells, and GR-mediated IRS-1 suppression activated the ERK2 MAP kinase pathway, which is required for GR-mediated EMT. Taken together, our results indicate that GR–IRS-1 signaling axis plays an essential role in regulating the survival, invasion, and metastasis of breast cancer cells.

关键词： metastasis breast invasion