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Spatio-temporal suspended sediment fingerprinting under different land management practices

International Journal of Sediment Research 2023年第4期38卷 481-493页

作者： Maziar Mohammadi Abdulvahed Khaledi Darvishan nader Bahramifar Seyed Jalil Alavi Department of Watershed Management Engineering Faculty of Natural Resources Tarbiat Modares University Department of Geography University of Zurich Department of Environmental Science Faculty of Natural Resources Tarbiat Modares University Department of Forestry Faculty of Natural Resources Tarbiat Modares University

Understanding spatio-temporal suspended sediment dynamics is more important in large watersheds due to the decisive role of local source apportionment in sediment transport and yield. The Talar River with a large mountainous watershed in northern Iran, which plays a vital role in water supply for agriculture and drinking, recently has faced quality degradation. The current study explores the relative contribution of suspended sediment sources using geochemical tracers and fingerprinting techniques in high and low flow periods along this river. Soil samples were collected from four major land uses including rangeland, forest, rainfed agriculture, and irrigated agriculture, as well as riverbanks and riparian zones along the main river. Furthermore, suspended sediment was sampled at four sampling points along the main river in two seasons. Land use apportionment in suspended sediment yield was calculated using an unmixing model included in a newly developed package(Finger Pro) in high flow and low flow, separately. The fingerprinting results showed a highly spatio-temporal dynamic for sediment source contribution along the main river in high and low flow periods. Natural land uses(forest and rangeland) in upstream reaches and agricultural land uses and riverbank sources in downstream reaches showed higher contributions to suspended sediment yield. The mean contribution of various land uses for both high and low flow periods indicated substantial contributions from forest(34%-41%) and riverbanks(31%-33%). The significant difference in sediment geochemical properties for the two flow seasons highlights the important role of the prevailing climatic-hydrologic condition on river ***, this issue indicates that sediment source contributions and transfer mechanisms are highly dynamic in Talar River watershed. The current study outcomes provide essential knowledge to create a robust strategy for mitigation of river sediment pollution.

关键词： Land use River water quality Sediment fingerprinting Sustainability Unmixing model

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聚乙烯基吡啶高氯酸盐作为高效固体酸催化剂在无溶剂条件下催化醛化学选择性制备二乙酸盐(英文)

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催化学报 2014年第3期35卷 329-334页

作者： nader Ghaffari Khaligh House Research of Professor Reza Education Guilan

Poly(4-vinylpyridinium) perchlorate has been used as a supported,recyclable,environmentally-benign catalyst for the formation of acylals from aliphatic and aromatic aldehydes in good to excellent yields under solvent-free ***,the reaction conditions were tolerant of *** methodology offers several distinct advantages,including its operational simplicity and high product yield,as well as being green in terms of avoiding the use of toxic catalysts and ***,the catalyst can be recovered and reused several times without any loss in its activity.

关键词：固体酸催化剂无溶剂条件乙烯基吡啶二乙酸酯高氯酸盐芳香族醛化学选择性制备

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(Bbpy)(HSO_4)_2无卤素可重复使用 Brnsted 离子液体催化剂用于一锅法多组分合成非对称多氢喹啉衍生物（英文）

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催化学报 2014年第9期35卷 1497-1503页

作者： nader Ghaffari Khaligh Research House of Professor Reza Education GuilanRashtDistrict141569-17139Iran

1,1'‐Butylenebispyridinium hydrogen sulfate is an efficient, halogen‐free and reusable Brnsted ionic liquid catalyst for the synthesis of ethyl‐4‐aryl/heteryl‐hexahydro‐trimehtyl‐5‐ oxoquino‐line‐3‐carboxylates by the one‐pot condensation of dimedone, aryl/heteryl aldehydes, ethyl aceto‐acetate, and ammonium acetate under solvent‐free conditions. This method has the advantages of high yield, clean reaction, simple methodology, and short reaction time. The ionic liquid can be re‐cycled five times without significant loss of the catalytic activity.

关键词：离子液体催化剂可重复使用硫酸氢羧酸盐无卤素一锅法合成布朗

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3-甲基-1-磺酸咪唑鎓硫酸氢存在下四组分一锅法合成苯并[g]茚并[2,1-b]喹啉衍生物(英文)

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催化学报 2014年第11期35卷 1858-1863页

作者： nader Ghaffari Khaligh Research House of Professor Reza Education Guilan

A simple and facile synthesis of 12-arylbenzo[g]indeno[2,1-b]quinoline-6,11,13-trione deriv-atives was accomplished by the one-pot condensation of 2-hydroxynaphthalene-1,4-dione, aryl aldehydes, 2H-indene-1,3-dione, and ammonium acetate under solvent-free conditions in the presence of a Brnsted ionic liquid catalyst, namely 3-methyl-1-sulfonic acid imidazolium hydrogen sulfate.

关键词：喹啉衍生物一锅合成硫酸氢咪唑磺酸四组分离子液体催化剂苯

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微空心阴极维持放电的实验研究

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光谱学与光谱分析 2011年第1期31卷 21-24页

作者：夏广庆 nader Sadeghi 大连理工大学工业装备结构分析国家重点实验室运载工程与力学学部航空航天学院辽宁大连116024 约瑟夫·傅里叶大学&法国国家科学研究中心光谱物理实验室

为在高气压下形成大体积均匀等离子体,将微空心阴极放电(MHCD)作为等离子体阴极,引入另一阳极而设计为微空心阴极维持放电(MCSD)的发生装置。实验研究了MCSD的产生放电条件,通过在氩气中添加少量氮气,分析氮分子第一正带系发射光谱的方... 详细信息

为在高气压下形成大体积均匀等离子体,将微空心阴极放电(MHCD)作为等离子体阴极,引入另一阳极而设计为微空心阴极维持放电(MCSD)的发生装置。实验研究了MCSD的产生放电条件,通过在氩气中添加少量氮气,分析氮分子第一正带系发射光谱的方法测量了MCSD中羽流区不同位置的气体温度。研究表明,当等离子体阴极电流增加到一个临界值(约为0.5～1mA)以后,在等离子体阴极与诱导阳极之间才会出现大体积辉光放电,羽流区气体温度在实验条件下约为500K。MCSD减缓了辉光向弧光的转变,在高气压下可产生稳定的大体积辉光放电。

关键词：微空心阴极维持放电气体温度高气压辉光放电光学发射光谱

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光学发射光谱法测量氩气微空心阴极放电中特性参数

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光谱学与光谱分析 2010年第7期30卷 1952-1955页

作者：夏广庆 nader Sadeghi 大连理工大学工业装备结构分析国家重点实验室运载工程与力学学部航空航天学院辽宁大连116024 光谱物理实验室约瑟夫·傅里叶大学&法国国家科学研究中心

针对微空心阴极放电(MHCD)装置,通过在氩气中添加少量氮气,分析氮分子第一正带系N2(B3ΠgA3u+)发射光谱的方法测量了MHCD中的气体温度,通过氩气中混有的少量氢气,分析Hβ谱线Stark加宽得到电子数密度。研究表明,MHCD在极小的体积和很高... 详细信息

针对微空心阴极放电(MHCD)装置,通过在氩气中添加少量氮气,分析氮分子第一正带系N2(B3ΠgA3u+)发射光谱的方法测量了MHCD中的气体温度,通过氩气中混有的少量氢气,分析Hβ谱线Stark加宽得到电子数密度。研究表明,MHCD在极小的体积和很高的功率密度下维持放电,致使发生了明显的气体加热现象,气体温度可高于700 K,并且随着放电室压强和放电电流呈有规律的变化,具有较好的可控性,电子数密度的量级为1014～1015cm-3。通过对不同条件下等离子体特性参数的诊断和分析,得到了其量级和变化规律,对MHCD的广泛研究和应用提供了重要的实验数据和技术支持。

关键词：微空心阴极放电转动温度气体温度电子数密度光学发射光谱

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无溶剂条件下N-磺酸琥珀酰亚胺催化乙酰化反应(英文)

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催化学报 2013年第4期34卷 695-703页

作者： Farhad SHIRINI nader Ghaffari KHALIGH Department of Chemistry Faculty of Sciences University of Guilan

A small amount of succinimide-N-sulfonic acid efficiently catalyzed the acetylation of a variety alcohols, phenols, thiols, amines and aldehydes with acetic anhydride at room temperature under solvent free conditions. This catalyst has the advantages of excellent yields and short reaction times and the reaction can be carried out on a large scale, which makes it potentially useful for industrial applications.

关键词： Succinimde‐N‐sulfonic acid Protection Acetylation Chemoselective reaction Solvent‐free condition

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Anti-inflammatory, anti-oxidative and anti-apoptotic effects of Heracleum persicum L. extract on rats with gentamicin-induced nephrotoxicity

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Asian Pacific Journal of Tropical Biomedicine 2021年第2期11卷 47-58页

作者： Mohsen Akbaribazm nader Goodarzi Mohsen Rahimi Leila Naseri Mozafar Khazaei Students Research Committee Kermanshah University of Medical SciencesKermanshahIran Department of Basic Sciences and Pathobiology Faculty of Veterinary MedicineRazi UniversityKermanshahIran Department of Medical Parasitology and Mycology School of MedicineShahid Beheshti University of Medical SciencesTehranIran Fertility and Infertility Research Center Health Technology InstituteKermanshah University of Medical SciencesKermanshahIran

Objective:To evaluate the effect of Heracleum persicum *** gentamicin-induced nephrotoxicity in ***:Thirty-six Wistar rats were divided into 6 groups including control(normal saline),gentamicin(80 mg/kg/d for 10 d),Heracleum persicum(750 mg/kg/d),and gentamicin(10 d)+Heracleum persicum extract at three different doses(250,500,and 750 mg/kg/d for 40 d).Urine creatinine,urea,protein,and albumin levels were *** addition,serum urea,creatinine,sodium,potassium,cytokines(TNF-α,IL-1β,IL-6,and IL-10),glutathione peroxidase activity,total antioxidant capacity,kidney malondialdehyde,stereological parameters,and expressions of apoptosis-related genes(p53,Bax,Bcl-2,and caspase-3)were *** LD50 of Heracleum persicum extract was determined based on Lorke’s *** evaluation was also ***:In addition to decreased urine protein and albumin,and increased creatinine and urea,co-treatment with gentamicin and Heracleum persicum significantly reduced levels of creatinine and urea,and increased sodium and potassium in *** persicum treatment also improved stereological parameters and serum inflammatory *** was a significant increase in serum glutathione peroxidase activity and total antioxidant capacity as well as a reduction in malondialdehyde ***,treatment with Heracleum persicum extracts downregulated p53,caspase-3,and Bax and upregulated Bcl-2 *** histopathological evaluation,Heracleum persicum extracts showed protection against gentamicin-induced renal ***:Heracleum persicum exhibits protective effects against gentamicin-induced structural and functional renal impairments.

关键词： Kidney Heracleum persicum L. Gentamicin Stereology Apoptosis

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温和条件下丁二酰亚胺-N-磺酸催化合成双吲哚甲烷和香豆素衍生物(英文)

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催化学报 2013年第10期34卷 1890-1896页

作者： Farhad Shirini nader Ghaffari Khaligh Department of Chemistry Faculty of SciencesUniversity of Guilan

A mild and simple procedure is described for the synthesis of bis(indolyl)methane and coumarin derivatives using succinimide-N-sulfonic acid as an efficient,cheap,and reusable catalyst under mild conditions.

关键词： Succinimde-N-sulfonic acid Multi-component reaction Bis(indolyl)methane Coumarin Mild reaction condition

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Clayey soil stabilization using alkali-activated volcanic ash and slag

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Journal of Rock Mechanics and Geotechnical Engineering 2022年第2期14卷 576-591页

作者： Hania Miraki nader Shariatmadari Pooria Ghadir Soheil Jahandari Zhong Tao Rafat Siddique Department of Civil Engineering Iran University of Science and TechnologyTehranIran Centre for Infrastructure Engineering Western Sydney UniversityPenrithNSW2751Australia Thapar Institute of Engineering and Technology PatialaIndia

Lime and Portland cement are the most widely used binders in soil stabilization ***,due to the high carbon emission in cement production,research on soil stabilization by the use of more environmentally-friendly binders with lower carbon footprint has attracted much attention in recent *** research investigated the potential of using alkali-activated ground granulated blast furnace slag(GGBS)and volcanic ash(VA)as green binders in clayey soil stabilization projects,which has not been studied *** effects of different combinations of VA with GGBS,various liquid/solid ratios,different curing conditions,and different curing periods(i.e.7 d,28 d and 90 d)were *** strength and durability of specimens against wet-dry and freeze-thaw cycles were then studied through the use of mechanical and microstructural *** results demonstrated that the coexistence of GGBS and VA in geopolymerization process was more effective due to the synergic formation of N-A-S-H and C-(A)-S-H ***,although VA needs heat curing to become activated and develop strength,its partial replacement with GGBS made the binder suitable for application at ambient temperature and resulted in a remarkably superior resistance against wet-dry and freeze-thaw *** carbon embodied of the mixtures was also evaluated,and the results confirmed the low carbon footprints of the alkali-activated ***,it was concluded that the alkali-activated GGBS/VA could be promisingly used in clayey soil stabilization projects instead of conventional binders.

关键词： Soil stabilization Alkali-activated material Volcanic ash(VA) Ground granulated blast furnace slag(GGBS) Curing condition Durability

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