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Seasonal changes in Tc and WSOc and their ^13c isotope ratios in Northeast Asian aerosols： land surface–biosphere–atmosphere interactions

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Acta Geochimica 2017年第3期36卷 355-358页

作者： chandra mouli Pavuluri Kimitaka Kawamura Institute of Surface-Earth System Science Tianjin University Tianjin 300072 China Institute of Low Temperature Science Hokkaido UniversitySapporo 060-0819 Japan chubu Institute for Advanced Studies Chubu University Kasugai 487-8501 Japan

In order to understand the relative importance of anthropogenic and biological sources of carbonaceous aerosols in Northeast Asia,we measured total carbon(Tc)and water-soluble organic carbon(WSOc)and their stable carbon isotope ratios(d^(13)c)in total suspended particulates collected from Sapporo,northern Japan(43.07°N,141.36°E)over a 1-year period(during 2 September 2009and 5 October 2010).Temporal variations of Tc showed a gradual decrease from mid-autumn to winter followed by a gradual increase to growing season with a peak in early *** d^(13)c_(Tc)and d^(13)c_(WSOc)showed very similar temporal trends with a gradual enrichment of^(13)c from mid-autumn to winter followed by a depletion in the^(13)c to early summer and thereafter it remained stable,except for few *** on the results obtained together with the air mass trajectories,we found that biogenic emissions including biological particles(e.g.,pollen)and secondary organic aerosol formation from biogenic volatile organic compounds are the important sources of carbonaceous aerosols in spring/summer whereas fungal spores from soil and biomass burning and enhanced fossil fuel combustion contribute significantly in autumn/winter and in winter,respectively,in Northeast Asia.

关键词： carbonaceous aerosols Stable carbon isotope ratios Sources Northeast Asia

conformal and continuous deposition of bifunctional cobalt phosphide layers on p-silicon nanowire arrays for improved solar hydrogen evolution

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Nano Research 2018年第9期11卷 4823-4835页

作者： Sitaramanjaneva mouli Thalluri Jerome Borme Kang Yu Junyuan Xu Isilda Amorim Joao Gaspar Liang Qiao Paulo Ferreira Pedro Alpuim Lifeng Liu International Iberian Nanotechnology Laboratory (INL) Av. Mestre. Jose Veiga Braga 4715-330 Portugal Materials Science and Engineering Program University of Texas at Austin Austin TX78712 USA Deportment of chemistry State Key Laboratory of Molecular Engineering of Polymers and Institute of Biomedical Sciences Fudon University Shanghai 200433 China Mechanical Engineering Department and IDMEc Instituto Superior Tdcnico University of Lisbon Av. Rovisco Pais Lisboa 1049-007 Portugal center of Physics University of Minho Braga 4710-057 Portugal

Vertically aligned p-silicon nanowire （SiNW） arrays have been extensively investigated in recent years as promising photocathodes for solar-driven hydrogen evolution. However, the fabrication of SiNW photocathodes with both high photoelectrocatalytic activity and long-term operational stability using a simple and affordable approach is a challenging task. Herein, we report conformal and continuous deposition of a di-cobalt phosphide （c02P） layer on lithography- patterned highly ordered SiNW arrays via a cost-effective drop-casting method followed by a low-temperature phosphorization treatment. The as-deposited c02P layer consists of crystalline nanoparticles and has an intimate contact with SiNWs, forming a well-defined SiNW@co2P core/shell nanostructure. The conformal and continuous co2P layer functions as a highly efficient catalyst capable of substantially improving the photoelectrocatalytic activity for the hydrogen evolution reaction （HER） and effectively passivates the SiNWs to protect them from photo-oxidation, thus prolonging the lifetime of the electrode. As a consequence, the SiNW@co2P photocathode with an optimized c02P layer thickness exhibits a high photocurrent density of -21.9 mA·cm^-2 at 0 V versus reversible hydrogen electrode and excellent operational stability up to 20 h for solar-driven hydrogen evolution, outperforming many nanostructured silicon photocathodes reported in the literature. The combination of passivation and catalytic functions in a single continuous layer represents a promising strategy for designing high-performance semiconductor photoelectrodes for use in solar-driven water splitting, which may simplify fabrication procedures and potentially reduce production costs.

关键词： solar-driven hydrogenevolution silicon nanowire cobalt phosphide photoelectrochemical water splitting drop-casting

天津市PM_(2.5)中氮含量及同位素的昼夜及季节变化

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中国环境科学 2021年第3期41卷 1014-1023页

作者：董志超徐占杰王爽李培森赵雪琰傅平青刘丛强 chandra mouli Pavuluri 天津大学地球系统科学学院表层地球系统科学研究院天津300072

为研究天津市大气气溶胶中氮的来源,分析了2016年夏、冬两季昼夜采集的细颗粒物气溶胶(PM_(2.5))中无机离子浓度和氮同位素组成(δ^(15)N).结果显示:天津市冬季平均PM_(2.5)质量浓度(207μg/m^(3))远高于夏季(40.1μg/m^(3)),冬季PM_(2... 详细信息

为研究天津市大气气溶胶中氮的来源,分析了2016年夏、冬两季昼夜采集的细颗粒物气溶胶(PM_(2.5))中无机离子浓度和氮同位素组成(δ^(15)N).结果显示:天津市冬季平均PM_(2.5)质量浓度(207μg/m^(3))远高于夏季(40.1μg/m^(3)),冬季PM_(2.5)的δ^(15)N值(+5.1‰)低于夏季(+10.7‰),即夏季PM_(2.5)较冬季更富集15N;夏季PM_(2.5)中NH^(4+)的平均浓度高于c(NO_(3)^(–)),但是冬季NO_(3)^(–)浓度最高,其次是c(NH^(4+))>c(SO_(4)^(2–));此外,通过对比昼夜样品,夏季PM_(2.5)中氮含量和氮同位素组成在昼夜均表现出明显差异,而冬季不明显.结果表明,天津市夏季气溶胶中含氮化合物在昼夜受海陆风的影响,即白天受海洋气溶胶影响较大而夜间则为陆源气溶胶物质影响,然而冬季受东亚季风的影响削弱了海陆风对海陆间大气气溶胶的交换作用,且在冬季化石燃料燃烧源氮贡献较大.

关键词：大气气溶胶氮氮同位素海陆风天津

放射性碳同位素技术在碳质气溶胶源解析中的应用研究进展

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地球科学与环境学报 2022年第4期44卷 685-698页

作者：赵雪琰徐占杰董志超李培森赵晓麦傅平青 chandra mouli PAVULURI 天津大学地球系统科学学院/表层地球系统科学研究院天津300072 天津大学天津市环渤海地球关键带科学与可持续发展重点实验室天津300072

碳质气溶胶是大气气溶胶的重要组成部分,能够影响太阳辐射在大气层中的正常传播,与气候变化、空气污染和人类健康等关乎人类可持续发展的重要问题密切相关。大气环境中的碳质气溶胶主要包含有机碳和元素碳,其中有机碳可分为水溶性有机... 详细信息

碳质气溶胶是大气气溶胶的重要组成部分,能够影响太阳辐射在大气层中的正常传播,与气候变化、空气污染和人类健康等关乎人类可持续发展的重要问题密切相关。大气环境中的碳质气溶胶主要包含有机碳和元素碳,其中有机碳可分为水溶性有机碳和非水溶性有机碳。碳质气溶胶的来源及其形成转化过程是目前大气环境科学领域最为重要的研究方向之一。放射性碳同位素比值(Δ^(14)c)在碳质气溶胶源解析上具有优势,是目前唯一可以量化化石源和生物源在不同类别碳质组分中贡献大小的手段。在系统总结国内外放射性碳同位素技术在碳质气溶胶源解析上的最新研究进展的基础上,详细阐述了放射性碳同位素比值在碳质气溶胶源解析上的应用原理,深入探究了放射性碳同位素比值在碳质组分中的研究进展,重点分析了单体分子放射性碳同位素分析在碳质气溶胶中的发展和应用。最后,对放射性碳同位素比值与稳定碳同位素比值(δ^(13)c)联用,以及单体分子标志物的放射性碳同位素比值研究进行了展望,为碳质气溶胶的来源解析和气溶胶化学过程研究提供参考依据。

关键词：放射性碳同位素稳定碳同位素源解析化石源生物源单体分子放射性碳同位素分析分子标志物碳质气溶胶

Induced Monocytes-Derived HScs (cD34+) with LPS Accelerated Homing Rat Bone Marrow-Mesenchymal Stem cell (BM-MScs, cD105) in Injured Pancreas

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Journal of Biomedical Science and Engineering 2015年第5期8卷 333-344页

作者： Fedik A. Rantam Purwati Budi Setiawan Sony Wibisono Ferdiansyah Joni Wahyuhadi Edward mouli Dwikora N. Utomo Heri Suroto candra Bumi Stem cell Laboratory Institute of Tropical Disease Airlangga University Surabaya Indonesia Virology and Immunology Laboratory Department of Microbiology Faculty of Veterinary Medicine Airlangga University Surabaya Indonesia Tropic and Infection Division of Internal Medicine School of Medicine Airlangga University Surabaya Indonesia Animal Surgery Animal Hospital Faculty of Veterinary Medicine Airlangga University Surabaya Indonesia Regenerative Medicine Department of Orthopedic Dr. Soetomo Teaching Hospital/School of Medicine Airlangga University Surabaya Indonesia Department of Neurosurgery Dr. Soetomo Teaching Hospital/School of Medicine Airlangga University Surabaya Indonesia

Investigating the function of combining induced rat monocytes-derived bone marrow-haemopoietic stem cell (rat BM-HScs) with LPS and rat bone marrow-mesenchymal stem cell (rat BM-MScs) was to analyze the acceleration of homing process mechanism in injured pancreas. Mononucleated stem cells were isolated from aspirated whole rat BM using ficoll and cultured in α-MEM complete growth medium in 10 cm petridish. After two days, adherent cells after washing twice in petridish were added α-MEM growth medium and then mesenchymal cells were characterized using cD105 marker in third passage and labeled PKH26. Then haemopoietic stem cells (HScs) were isolated with magnetic beads cD34+ and differentiated in vitro, and then induced monocytes with LPS. Animal experiment used 28 male Wistar rats, and divided them into 4 groups. After transplantation combined, both cells between monocyte derived HSc (mHScs) and rat BM-MSc were analyzed expression of pair box gen 4 (Pax4), pancreatic and duodenal homeobox (Pdx1), c-peptide using immunohistochemistry, then secretion of insulin and c-peptide analyzed using indirect ELISA. Results showed that the expressions of Pax4, Pdx1, c-peptide found in the surface membrane cell of pancreatic cell, and secreted c-peptide and insulin were shown significant (P combined cells more dominant than non-combined cells. conclusions suggested that combining of induced monocytes-derived HScs and rat BM-MScs has accelerated homing MScs into injured pancreatic tissue.

关键词： Induced Monocyte Derived HScs Rat BM-MScs Homing Injured Pancreas

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人OPG与肿瘤坏死因子族蛋白的结合研究

军医进修学院学报 2004年第4期25卷 311-313页

作者：步荣发 christopher W Borysenko 李亚男 Sara E kalla Harry c Blair 解放军总医院口腔科 Departments of Pathology and cell Biology & Physiology University of PittsburghSchool of Medicine and Veteran's Affairs Medical Center Pittsburgh PA 15243USA

目的 :检测OPG与TNF家族蛋白的结合及探索它们相互作用机制。方法 :免疫沉淀分析加Western印迹 ,酶联免疫吸附测定方法 ,偶联剂交叉链接 ,表面胞质团共振。结果 :OPG与RANKL ,TRAIL和TNFα用不同方法检测均有结合。OPG与TNFα的结合由Bi... 详细信息

目的 :检测OPG与TNF家族蛋白的结合及探索它们相互作用机制。方法 :免疫沉淀分析加Western印迹 ,酶联免疫吸附测定方法 ,偶联剂交叉链接 ,表面胞质团共振。结果 :OPG与RANKL ,TRAIL和TNFα用不同方法检测均有结合。OPG与TNFα的结合由Biacore进一步证实 ,在 pH为 7.4 ,温度在 2 0℃时 ,其离解系数为7.0nmol/L ,同OPG TRAIL亲和力。偶联剂交叉链接显示OPG TNFα结合的比例为 1∶1。结论 :TNFα能与OPG结合 ,物理条件影响其结合。

关键词： OPG 肿瘤坏死因子族蛋白相互作用免疫电泳技术检测