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Macroalgal deep genomics illuminate multiple paths to aquatic,photosynthetic multicellularity

Molecular Plant 2024年第5期17卷 747-771页

作者： David R.Nelson Alexandra Mystikou Ashish Jaiswal Cecilia Rad-Menendez Michael J.Preston Frederik De Boever Diana C.El Assal Sarah Daakour Michael W.Lomas Jean-Claude Twizere David H.Green William C.Ratcliff Kourosh salehi-Ashtiani Division of Science and Math New York University Abu DhabiAbu DhabiUAE Center for Genomics and Systems Biology(CGSB) New York University Abu DhabiAbu DhabiUAE Biotechnology Research Center Technology Innovation InstitutePO Box 9639Masdar CityAbu DhabiUAE Culture Collection of Algae and Protozoa Scottish Association for Marine ScienceObanScotlandUK National Center for Marine Algae and Microbiota Bigelow Laboratory for Ocean SciencesEast BoothbayMEUSA Laboratory of Viral Interactomes GIGA InstituteUniversity of LiegeLiegeBelgium School of Biological Sciences Georgia Institute of TechnologyAtlantaGAUSA

Macroalgae are multicellular,aquatic autotrophs that play vital roles in global climate maintenance and have diverse applications in biotechnology and eco-engineering,which are directly linked to their multicellularity ***,their genomic diversity and the evolutionary mechanisms underlying multicellularity in these organisms remain *** this study,we sequenced 110 macroalgal genomes from diverse climates and phyla,and identified key genomic features that distinguish them from their microalgal *** for cell adhesion,extracellular matrix formation,cell polarity,transport,and cell differentiation distinguish macroalgae from microalgae across all three major phyla,constituting conserved and unique gene sets supporting multicellular *** genes show phylum-and climate-specific expansions that may facilitate niche ***,our study reveals genetic determinants of convergent and divergent evolutionary trajectories that have shaped morphological diversity in macroalgae and provides genome-wide frameworks to understand photosynthetic multicellular evolution in aquatic environments.

关键词： macroalgae multicellularity comparative genomics evolution adhesome endogenous viral elements

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水中亚硒酸盐的氧化效能研究:氧化剂、动力学与影响因素

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环境科学学报 2024年

作者：吕金容 Ali Mashayekh-salehi 蒋才芳朱倩颖梁钟月张馨怡韦富存董慧峪谢婷刘绍刚广西民族大学化学化工学院林产化学与工程国家民委重点实验室广西林产化学与工程重点实验室广西林产化学与工程协同创新中心广西绿城水务股份有限公司中国科学院生态环境研究中心中国科学院饮用水科学与技术重点实验室

硒元素的多种价态中,亚硒酸盐(Se（Ⅳ）)毒性较高.本文对比研究了水中Se（Ⅳ）在自由氯（HOCl）、臭氧（O3）、高铁酸钾(Fe（Ⅵ）)和高锰酸钾(Mn（Ⅶ）)4种氧化剂作用下的氧化动力学以及其工艺因素(氧化剂投加量、pH值、天然有机物（NO... 详细信息

硒元素的多种价态中,亚硒酸盐(Se（Ⅳ）)毒性较高.本文对比研究了水中Se（Ⅳ）在自由氯（HOCl）、臭氧（O3）、高铁酸钾(Fe（Ⅵ）)和高锰酸钾(Mn（Ⅶ）)4种氧化剂作用下的氧化动力学以及其工艺因素(氧化剂投加量、pH值、天然有机物（NOM）、离子强度、共存离子)对其氧化效能的影响.结果表明,Se（Ⅳ）的氧化率随着氧化剂投加量增大而提升.在中性条件下,HOCl和Fe（Ⅵ）对Se（Ⅳ）氧化效果最好,氧化率分别为90.0%和70.0%,O3和Mn（Ⅶ）分别在碱性和酸性条件下对Se（Ⅳ）具有最佳氧化效能.NOM可抑制4种氧化剂对Se（Ⅳ）的氧化,而离子强度促进了HOCl、Fe（Ⅵ）和Mn（Ⅶ）氧化.Br-的存在促进了HOCl和O3氧化Se（Ⅳ）,而对Fe（Ⅵ）和Mn（Ⅶ）氧化无明显影响;SO42-、NO3-、Ca2+、Mg2+促进了O3和Fe（Ⅵ）氧化Se（Ⅳ）但抑制Mn（Ⅶ）氧化,其中Ca2+的抑制作用最大.此外,选取地表水、地下水和湖库水为水源水进行不同氧化剂对Se（Ⅳ）氧化效能的验证评价,研究结果可为含硒水体在氧化过程中的环境行为与毒性控制提供理论依据.

关键词：饮用水处理亚硒酸盐氧化动力学天然有机物共存离子

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Application of diffusive transport model for better insight into retardation mechanisms involved in ion-imprinted membrane transport

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Chinese Journal of Chemical Engineering 2016年第9期24卷 1161-1165页

作者： Ehsan salehi Department of Chemical Engineering Faculty of Engineering Arak University

Heavy metal removal from water is a great concern for environmentalists and engineers. Ion-imprinted membranes are among the state of the art technologies for selective adsorption of heavy metals from aqueous environment. Dialysis permeation of nickel ions through Ni(II)-imprinted membranes has been thermodynamically studied in our prior work. In current study, the diffusive transport model was developed and then applied for better insight into the retardation mechanisms involved in the ion-imprinted membrane transport. The Sips isotherm model was coupled with the transport model to obtain the governing equation. Chemisorption and physical interactions(bulk diffusion and pore-clogging) were the most probable retardation mechanisms according to the modeling results. Relative retardation factor(η) was also defined as; transport-rate controlled by chemical adsorption to that controlled by physical interactions. With the help of the retardation factor, it was understood that the membrane behavior gradually changes from chemisorption to facilitated transport during permeation time. Effect of important operating parameters such as time, temperature and concentration on transport behavior was also investigated. Results indicated that chemisorption rate is rather higher at lower concentrations, early permeation times and reduced temperatures. In addition, η tabulated greater values for Ni(II) compared to Co(II) due to the imprinting effect.

关键词： Ion-imprinted membrane Mathematical modeling Chemisorption Retardation mechanism

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Optimal fuzzy switch placement to increase automation level of electric distribution network considering asset management principles

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Journal of Central South University 2019年第7期26卷 1897-1909页

作者： POUYA Salyani JAVAD salehi Department of Electrical Engineering Azarbaijan Shahid Madani University

Since distribution sector is inherent into high amount of failures, distribution companies (DISCOs) are responsible of attaining an acceptable value for the reliability indices and otherwise they will face up to complaints. So they are usually obligated by regulators to invest on reliability improvement of network. But this investment on reliability is usually from the DISCO’s viewpoint and is also irrespective of customer satisfaction level. In other words, customers are not at the same level of sensitivity to interruptions but DISCO improves the reliability of network without considering the differences in importance degree of loads and their level of reliability requirement. On the other hand DISCOs attempt to reduce their investment costs as much as possible. This paper introduces a novel approach in the field of joint switch placement that can reduce the switch cost from the perspective of asset management policies. To this end, two switch placement plannings in different types of strategies are performed to compare their results. Firstly as witch placement is performed based on reducing the total energy not supplied (ENS) of the system. Then by revising the strategy, a fuzzy switch placement is performed from the DISCO’s point of view which just considers the total ENS of load points most sensitive to interruptions known as important or critical loads. Furthermore, by meeting the related constraints, the reliability of low sensitive customers is disregarded. This is a load importance based planning which can result in switch cost reduction relative to the amount achieved in previous strategy and implies the management of risks associated with reliability and respective constraint. Fuzzy method and new switching mechanism in fuzzy environment of network are implemented to modeling and controlling the risks associated to ENS of critical loads and also the ENS of system.

关键词： fuzzy switch placement asset management distribution company reliability load importance based planning

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Long-term impact of municipal sewage irrigation on treated soil and black locust trees in a semi-arid suburban area of Iran

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Journal of Environmental Sciences 2009年第10期21卷 1438-1445页

作者： Masoud Tabari Azadeh salehi Department of Forestry Faculty of Natural Resources and Marine Sciences Tarbiat Modares University

The effects of municipal sewage irrigation on the soil and black locust （Robinia pseudoacacia L.） tree were studied. For this purpose, two artificial black locust stands under irrigation of municipal sewage and well water were selected in south of Tehran, Iran. Data were collected using technique of systematic random sampling with 4 replicates in each stand. It was found that the growth of black locust tree, as indicated by diameter at breast height, total height, crown length, average crown diameter, basal area and volume, in sewage irrigation stand was much higher than that of well water irrigation stand （P 〈 0.01）. Plant analysis indicated that concentrations of leaf nutrients （N, E K, Ca, Mg, Na, Fe, Mn, Cu and Zn） were greater in sewage-irrigated trees, without toxicity to the minerals of tree leaf, than those of well waterirrigated trees, and positively correlated with their respective value in soil. Ni, Cr and Pb were not detected in leaf samples. Application of sewage resulted in a 1.5-fold increase in the concentrations of soil nutrients, Ni, Cr and Pb. Among these minerals only Pb and Ni in some soil samples exceeded the toxicity limit. The increase in pH, electrical conductivity （EC） and organic carbon of soil was also observed in sewage irrigation. Results confirm that besides the use as irrigation water, municipal sewages are also a potential source of plant nutrients. However, significant accumulation of heavy metals such as Pb and Ni in soil needs to be monitored.

关键词： afforestation irrigation municipal sewage black locust nutrient heavy metal

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Characteristics of a heavy water photoneutron source in boron neutron capture therapy

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Chinese Physics C 2013年第7期37卷 88-92页

作者： Danial salehi Dariush Sardari M. salehi Jozani Department of Radiological and Nuclear Engineering Science and Research Branch Islamic Azad University Department of Electrical Engineering Islamic Azad University South Tehran Branch

Bremsstrahlung photon beams produced by medical linear accelerators are currently the most commonly used method of radiation therapy for cancerous tumors. Photons with energies greater than 8-10 MeV potentially generate neutrons through photonuclear interactions in the accelerator＇s treatment head, patient＇s body, and treat- ment room ambient. Electrons impinging on a heavy target generate a cascade shower of bremsstrahlung photons, the energy spectrum of which shows an end point equal to the electron beam energy. By varying the target thickness, an optimum thickness exists for which, at the given electron energy, maximum photon flux is achievable. If a source of high-energy photons i.e. bremsstrahlung, is conveniently directed to a suitable D20 target, a novel approach for production of an acceptable flux of filterable photoneturons for boron neutron capture therapy （BNCT） application is possible. This study consists of two parts. 1. Comparison and assessment of deuterium photonuclear cross section data. 2. Evaluation of the heavy water photonuclear source.

关键词： BNCT photoneutron source linac heavy water

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Extended adsorption transport models for permeation of copper ions through nanocomposite chitosan/polyvinyl alcohol thin affinity membranes

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Chinese Journal of Chemical Engineering 2016年第11期24卷 1527-1532页

作者： Ehsan salehi Leila Bakhtiari Mahdi Askari Department of Chemical Engineering Faculty of EngineeringArak University Membrane Research Center Department of Chemical EngineeringRazi University

Transport of copper ions through nanocomposite chitosan/polyvinyl alcohol thin adsorptive membranes has been mathematically investigated in the current study. Unsteady-state diffusive transport model was coupled with the Freundlich isotherm to predict the concentration of the ions in dialysis permeation operation. Pristine model was not successful in predicting the experimental data based upon its low coefficients of determination（0.1

关键词： Modeling Chitosan Nanocomposite membrane adsorbents Copper ion Dialysis

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A comparison between powder flow property testers

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Particuology 2017年第3期15卷 10-20页

作者： Hamid salehi Diego Barletta Massimo Poletto Dipartimento di lngegneria lndustriale Universita degli Studi di Salerno Via Giovanni Paolo II 132 84084 Fisciano SA Italy

In this work, three different shear testers-the Jenike shear cell tester, the Schulze ring shear tester, and the Brookfield powder flow tester-were compared in terms of the raw shear stress time series, yield loci points, angle of internal friction, cohesion, and unconfined yield strength. The three different powders of dolomitic lime, calcium lactate, and calcium carbonate were used for these comparisons. These three powders were characterized into different flowability classes using the ]enike classification, wherein dolomitic lime falls into the cohesive range, calcium lactate falls into the free-flowing range, and calcium carbonate falls into the very cohesive range. Results showed that the best agreement between the testers was found with moderately cohesive powders such as dolomitic lime. Furthermore, the free-flowing material tends to produce more consistent data between the three testers in terms of shear stresses and yield loci. It should be noted that the pre-shear data of free-flowing powder obtained by the Jenike shear cell must be appropriately interpreted. The largest differences between the testers are found with calcium carbonate, which is a highly compressible powder. The ways in which a high powder compressibility can differently affect the results obtained with the different testers were discussed.

关键词： Powder flow property Shear tester Flowability Jenike tester Schulze tester Brookfield powder flow tester

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Validation of the Wiedemann–Franz law in a granular s-wave superconductor in the nanometer scale

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Chinese Physics B 2017年第3期26卷 506-514页

作者： A Yousefvand H salehi M Zargar Shoushtari Department of Physics Shahid Chamran University of Ahvaz Ahvaz Iran

The present study tries to evaluate the validity of the Wiedemann-Franz law in a granular s-wave superconductor in the presence of concentrated impurities. By using Green＇s function method and the Kubo formula technique, three distinct contributions of the Aslamazov-Larkin, the Maid-Thompson and, the density of states are calculated for both the electrical conductivity and the thermal conductivity in a granular s-wave superconductor. It is demonstrated that these different con- tributions to the fluctuation conductivity depend differently on the tunneling because of their different natures. This study examines the transport in a granular superconductor system in three dimensions in the limit of large tunneling conductance, which makes it possible to ignore all localization effects and the Coulomb interaction. We find that the tunneling is efficient near the critical temperature and that there is a crossover to the characteristic behavior of a homogeneous system. When it is far from the critical temperature, the tunneling is not effective and the system behaves as an ensemble of real zero-dimensional grains. The results show that the Wiedemann-Franz law is violated in both temperature regions.

关键词： granular superconductor s-wave impurity vertex fluctuation propagator

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One-pot Synthesis and Characterization of 13-Acetyl-9-methyl-11-oxo-8- oxa- 10,12-d iazatricyclo [7.3.1.0^2,7] trideca- 2,4,6- triene

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Chinese Journal of Chemical Physics 2006年第1期19卷 84-88页

作者： Hojatollah salehi Qian-rong Li Qing-xiang Guo Hefei National Laboratory for Physical Sciences at Microscale Department of Chemistry University of Science and Technology of China Hefei 230026 China Scholarship Department Ministry of Science Research and Technology P.O. Box Tehran 15875-6185 Iran

An efficient and environmentally friendly procedure for the one-pot synthesis of 13-acetyl-9-methyl-ll-oxo-8-oxa-10,12-diazatricyclo[7.***.1.0^2,7]trideca-2,4,6-triene from salicylaldehyde, acetylacetone and urea via Biginelli condensation and intramolecular Michael-addition by using magnesium bromide as an inexpensive and easily available catalyst in a solvent-free condition is described. The structural elucidation of the product is reported by ^1H- and ^13C NMR spectra. The product can also be identified by its EI TOF mass spectrometry based on the molecular ion at m/s 246（10%） and on the fragment ions in which two nitrogen atoms are remained. Three kinds of characteristic fragmentation pathways from the molecular ion were observed. One is the loss of the OH radical to form the dihydropyrimidinone cation at m/z 229（48%）, followed by elimination of a molecular methane forming the pyrimidinone cation at m/z 213（27%）. The second is the cleavage of the C6H4OH radical, and the formation of the dihydropyrimidinone cation at m/z 153（24%）. The third one is the loss of MeC-O radical to afford the oxygen-bridged fragment ion at m/z 203（33%）.

关键词： Oxygen-bridged dihydropyrimidinone Intramolecular Michael-addition One-pot solvent-free synthesis NMR EI-TOFMS

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