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Evaluation of water management on arsenic methylation and volatilization in arsenic-contaminated soils strengthened by bioaugmentation and biostimulation

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Journal of Environmental Sciences 2024年第3期137卷 515-526页

作者： Peng Chen Yi Liu guo-Xin Sun State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical GardenChinese Academy of SciencesWuhan 430074China University of Chinese Academy of Sciences Beijing 100049China

Arsenic(As) fate in paddy fields has been one of the most significant current issues due to the strong As accumulation potential of rice plants under fooded conditions. However,no attempt was done to explore As methylation and volatilization under non-fooded conditions. Herein, we investigated the effects of water management on As methylation and volatilization in three arsenic-contaminated soils enhanced by biostimulation with strawderived organic matter and bioaugmentation with genetic engineered Pseudomonas putida KT2440(GE P. putida). Under fooded conditions, the application of biochar(BC), rice straw(RS)and their combination(BC+RS) increased total As in porewater. However, these effects were greatly attenuated under non-fooded conditions. Compared with RS amendment alone, the combination of GE P. putida and RS further promoted the As methylation and volatilization,and the promotion percentage under non-fooded conditions were significantly higher than that under fooded conditions. The combined GE P. putida and RS showed the highest efficiency in As methylation(88 μg/L) and volatilization(415.4 μg/(kg·year)) in the non-fooded soil with moderate As contamination. Finally, stepwise multiple linear regression analysis presented that methylated As, DOC and p H in porewater were the most important factors contributing to As volatilization. Overall, our findings suggest that combination of bioaugmentation with GE P. putida and biostimulation with RS/BC+RS is a potential strategy for bioremediation of arsenic-contaminated soils by enhancing As methylation and volatilization under non-fooded conditions.

关键词： Arsenic methylation Arsenic volatilization Water management Straw incorporation Bioaugmentation

A Deep Learning Method for Computing Eigenvalues of the Fractional Schrödinger Operator

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Journal of Systems Science & Complexity 2024年第2期37卷 391-412页

作者： guo Yixiao MING Pingbing LSEC Institute of Computational Mathematics and Scientific/Engineering ComputingAcademy of Mathematics and Systems ScienceChinese Academy of SciencesBeijing 100190China School of Mathematical Sciences University of Chinese Academy of SciencesBeijing 100049China

The authors present a novel deep learning method for computing eigenvalues of the fractional Schrödinger operator.The proposed approach combines a newly developed loss function with an innovative neural network architecture that incorporates prior knowledge of the problem.These improvements enable the proposed method to handle both high-dimensional problems and problems posed on irregular bounded domains.The authors successfully compute up to the first 30 eigenvalues for various fractional Schrödinger operators.As an application,the authors share a conjecture to the fractional order isospectral problem that has not yet been studied.

关键词： Eigenvalue problem deep learning fractional Schrödinger operator isospectral problem

Thermodynamic and experimental study of high-temperature roasting of blast furnace gas ash for recovery of metallic zinc and iron

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Journal of Iron and Steel Research(International) 2024年第1期31卷 108-120页

作者： Zi-han Wang Jing guo Han-jie guo Bin Li School of Metallurgical Engineering University of Science and Technology BeijingBeijing100083China School of Metallurgical Engineering Xi’an University of Architecture and TechnologyXi’an710055ShaanxiChina

A high-temperature reduction roasting method was used to achieve metallic iron and zinc recovery from blast furnace gas ash(BFA).The reduction processes for Zn-containing and Fe-containing oxides were analyzed in detail by using ther-modynamic equilibrium calculation and the principle of minimum free energy.The results showed that the main reaction in the system is the reduction of ZnFe_(2)_(4)and iron oxides.Over the full temperature range,iron oxides were more easily reduced than zinc oxides.Regardless of the amount of CO contained in the system,the reduction of ZnO to Zn was difficult to proceed below the boiling point(906℃)of Zn.When the reduction temperature is below 906℃,the reduction process of zinc ferrate was ZnFe_(2)_(4)→ZnO;when the reduction temperature is above 906℃,its reduction process becomed ZnFe_(2)_(4)→ZnO→Zn(g).The metallization and dezincification rates of the BFA gradually increased with increasing reaction temperature.As the C/O ratio increased,the metallization and dezincification rates first increased and then decreased.The effect of reduction time on BFA reduction was similar to that of reaction temperature.

关键词： Blast furnace gas ash Thermodynamics Zinc removal Iron reduction High-temperature reduction roasting Integrated utilization

Thermogravimetric characteristics of corn straw and bituminous coal copyrolysis based the ilmenite oxygen carriers

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Chinese Journal of Chemical Engineering 2024年第4期68卷 8-15页

作者： Pengxing Yuan Xiude Hu Jingjing Ma Tuo guo Qingjie guo College of Chemical Engineering Qingdao University of Science&TechnologyQingdao 266042China State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering Ningxia UniversityYinchuan 750021China

Herein,the co-pyrolysis reaction characteristics of corn straw(CS)and bituminous coal in the presence of ilmenite oxygen carriers(OCs)are investigated via thermogravimetry coupled with mass spectrometry.The results reveal that the participation of OCs weakens the devolatilization intensity of co-pyrolysis.When the CS blending ratio isting results according to the Coats-Redfern integral method show that the solidesolid interaction between OCs and coke changes the reaction kinetics,enhancing the co-pyrolysis reactivity at the high-temperature zone(750e950C).The synergistic effect is most prominent at a 30%CS blending ratio,with copyrolysis activation energy in the range of 26.35-40.57 kJ·mol^(-1).

关键词： Oxygen carrier Co-pyrolysis Biomass Coal

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绝经年龄影响因素研究进展

中国科学：生命科学 2024年第1期54卷 136-146页

作者：李玮琳郭婷秦莹莹山东大学生殖医学研究中心(山东大学附属生殖医院) 济南250012 生殖医学与子代健康全国重点实验室济南250012 生殖内分泌教育部重点实验室(山东大学) 济南250012 国家辅助生殖与优生工程技术研究中心济南250012 山东省生殖健康临床医学研究中心济南250012

绝经是卵巢储备耗竭的表现.绝经年龄提前提示了女性生殖寿命缩短,生育机会降低,影响出生人口数量;同时伴随性激素水平的改变,增加心血管疾病、骨质疏松、神经退行性变及肿瘤等疾病的发生风险,严重影响女性身心健康和生活质量.如何延缓... 详细信息

绝经是卵巢储备耗竭的表现.绝经年龄提前提示了女性生殖寿命缩短,生育机会降低,影响出生人口数量;同时伴随性激素水平的改变,增加心血管疾病、骨质疏松、神经退行性变及肿瘤等疾病的发生风险,严重影响女性身心健康和生活质量.如何延缓卵巢衰老,进而保持和提高生育力已成为生殖医学研究的热点问题.全面认识绝经年龄的影响因素,对于实现女性生育力保护,尤其是对早绝经高风险女性的早期干预和综合管理具有重要意义.本文将系统综述遗传、营养代谢、环境暴露等绝经年龄相关因素,为女性生殖健康管理提供科学依据.

关键词：绝经年龄遗传代谢性疾病医源性因素环境污染物

Proof of Two Supercongruences of Truncated Hypergeometric Series_(4)F_(3)

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Acta Mathematica Sinica,English Series 2024年第4期40卷 1015-1028页

作者： guo Shuai MAO Department of Mathematics Nanjing University of Information Science and TechnologyNanjing 210044P.R.China

In this paper,we prove two supercongruences conjectured by Z.-W.Sun via the Wilf-Zeilberger method.One of them is,for any prime p>3,4F3[7/6 1/2 1/2 1/2 1/6 1 1]-1/8]-1/2≡p(-2/p)+p^(3)/4(2/p)Ep-3 (mod p^(4))where(·/p... 详细信息

关键词： Supercongruence truncated hypergeometric series Wilf–Zeilberger method Euler numbers Legendre symbol

基于斑马鱼模型和网络药理学研究四方木皮的抗炎作用及其机制

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中国中药杂志 2024年第11期49卷 3070-3080页

作者：陈柳燕吴传梅梁潘韦金凤蓝婷婷郭敏李永华汝梅广西中医药大学药学院广西南宁530200 广西中医药大学广西高校中药民族药资源保护与利用重点实验室广西南宁530200 梧州市人民医院广西梧州543000

通过网络药理学-分子对接的方法,探讨四方木皮抗炎的作用机制,并用斑马鱼炎症模型进行验证。利用网络药理学预测四方木皮抗炎的有效成分、潜在核心靶点和信号通路。用脂多糖(LPS)诱导斑马鱼炎症模型,以细胞凋亡率和活性氧(ROS)生成率等... 详细信息

通过网络药理学-分子对接的方法,探讨四方木皮抗炎的作用机制,并用斑马鱼炎症模型进行验证。利用网络药理学预测四方木皮抗炎的有效成分、潜在核心靶点和信号通路。用脂多糖(LPS)诱导斑马鱼炎症模型,以细胞凋亡率和活性氧(ROS)生成率等指标来评价四方木皮水提物和70%乙醇提取物的抗炎活性,用q PCR验证预测的主要靶点。预测发现,四方木皮的潜在抗炎靶点有121个,PPI分析显示,四方木皮抗炎主要作用于信号传导和转录激活因子3 (signal transducer and activator of transcription 3,STAT3)、血管内皮生长因子A (vascular endothelial growth factor A,VEGFA)、表皮生长因子(epidermal growth factor,EGF)、肿瘤坏死因子(tumor necrosis factor,TNF)、肿瘤蛋白p53(tumor protein p53,TP53)、基质金属蛋白酶9(matrix metalloprotein 9,MMP9)、c-fos原癌蛋白(c-fos proto-oncogene protein,FOS)、环状素受体1(estrogen receptor 1,ESR1)、趋化因子8(c-x-c motif chemokine ligand 8,CXCL8)、白细胞分化抗原8(cluster of differentiation 8,CD8)等靶点;基因本体(Gene Ontology,GO)分析显示,生物过程主要作用于抑制细胞凋亡过程、基因表达的正调控、细胞增殖的正向调节;京都基因和基因组百科全书(Kyoto Encyclopedia of Genes and Genomes,KEGG)分析表明,MAPK信号通路、PI3K-Akt信号途径、HIF-1信号通路等可能在四方木皮抗炎中起关键作用;分子对接显示,5种关键成分与核心靶点均具有较强的结合力。斑马鱼动物实验表明,四方木皮可显著抑制炎症导致的ROS形成,降低幼鱼体内细胞死亡,抑制了组织中炎症反应的增强。此外,与空白组相比,模型组中核因子(nuclear factor,NF)-κB、TP53、FOS、衔接蛋白复合物-1(adaptor protein complex-1,AP-1)、丝裂原活化蛋白激酶P38(mitogen-activated protein kinases P38,P38)的转录水平显著上调;与模型组相比,四方木皮水提物和70%乙醇提取物组的斑马鱼组织中NF-κB、TP53、FOS、AP-1、P38的m RNA表达明显下调。四方木皮通过多成分、多靶点发挥抗炎作用,且其抗炎作用可能与抑制MAPK信号通路有关。

关键词：四方木皮抗炎斑马鱼网络药理学分子对接

Impacts of pancreatic exocrine insufficiency on gut microbiota

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2024年第4期25卷 271-279页

作者： Yulin guo Feng CAO Fei LI Department of General Surgery Xuanwu Hospital of Capital Medical UniversityBeijing 100053China Acute Pancreatitis Clinical Center of Capital Medical University Beijing 100053China

Pancreatic exocrine insufficiency(PEI)can be induced by various kinds of diseases,including chronic pancreatitis,acute pancreatitis,and post-pancreatectomy.The main pathogenetic mechanism of PEI involves the decline of trypsin synthesis,disorder of pancreatic fluid flow,and imbalance of secretion feedback.Animal studies have shown that PEI could induce gut bacterial overgrowth and dysbiosis,with the abundance of Lactobacillus and Bifidobacterium increasing the most,which could be partially reversed by pancreatic enzyme replacement therapy.Clinical studies have also confirmed the association between PEI and the dysbiosis of gut microbiota.Pancreatic exocrine secretions and changes in duodenal p H as well as bile salt malabsorption brought about by PEI may affect and shape the abundance and composition of gut microbiota.In turn,the gut microbiota may impact the pancreatic exocrine acinus through potential bidirectional crosstalk.Going forward,more and higher-quality studies are needed that focus on the mechanism underlying the impact of PEI on the gut microbiota.

关键词： Pancreatic exocrine insufficiency Gut microbiota Gut microbiome Pancreatic enzyme replacement therapy

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种植体周炎临床治疗研究进展

中国实用口腔科杂志 2024年第3期17卷 348-353页

作者：周婷慧欧国敏口腔疾病防治全国重点实验室国家口腔医学中心国家口腔疾病临床医学研究中心四川大学华西口腔医院种植科四川成都610041

种植修复是治疗牙列缺失和牙列缺损的主要方式之一,而种植体周炎可导致种植失败。种植体周炎的临床治疗方法分为非手术治疗和手术治疗,但目前缺乏较为完善统一的治疗方案和治疗成功标准,且不断出现新的治疗理念和治疗思路。文章就近年... 详细信息

种植修复是治疗牙列缺失和牙列缺损的主要方式之一,而种植体周炎可导致种植失败。种植体周炎的临床治疗方法分为非手术治疗和手术治疗,但目前缺乏较为完善统一的治疗方案和治疗成功标准,且不断出现新的治疗理念和治疗思路。文章就近年来种植体周炎临床治疗的研究进展做一综述,以期为其临床治疗提供参考,并为其进一步研究提供思路。

关键词：种植体周炎非手术治疗手术治疗