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Chinese Chemical Letters 2011年第11期22卷 1281-1284页

作者： reza heydari Batool Tahamipour Department of Chemistry The University of Sistan and Baluchestan P.O.Box 98135-674ZahedanIran

1,10-Phenanthrolinium N-ylides,can react with malonitrile and aromatic aldehydes via a domino-Knoevenagel cyclization to afford a new class of trihydropyrrolo[1,2-a][l,10]phenanthroline derivatives as stable helical c... 详细信息

关键词： 1 10-Phenanthrolinium N-ylide Domino-Knoevenagel-cyclization Trihydropyrrolo[1 2-a][1 10]phenanthrolines Multicomponent reaction

An efficient method for synthesis of organophosphorus compounds in aqueous media

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Chinese Chemical Letters 2009年第10期20卷 1175-1178页

作者： reza heydari Malek Taher Maghsoodlou Razieh Nejat Yami Department of Chemistry The University of Sistan and BaluchestanP.O.Box 98135-674 ZahedanIran

A convenient and facile one-pot synthesis of stable phosphorus ylides and 1,4-diionic organophosphorus compounds is reported by the reaction of triphenylphosphine, dialkylacetylenedicarboxylates and N-H, C-H or S-H acids in the presence of polyethyleneglycol （PEG）, β-cyclodextrin （β-CD）, glycerine （Gly） or ethyleneglycol （EG） in water. This methodology is of interest due to the use of water as a solvent, thus minimizing the cost operational hazards, and environmental pollution.

关键词： Water Triphenylphosphine Acetylenic esters Stable phosphorus ylides Polyethyleneglycol β-Cyclodextrin Glycerine Ethyleneglycol

Theophylline as a new and green catalyst for the one-pot synthesis of spiro[benzo[α]pyrano[2,3-c]phenazine]and benzo[α]pyrano[2,3-c]phenazine derivatives under solvent-free conditions

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Chinese Chemical Letters 2017年第2期28卷 446-452页

作者： Afshin Yazdani-Elah-Abadi Malek-Taher Maghsoodlou Razieh Mohebat reza heydari Department of Chemistry Faculty of Science University of Sistan and Baluchestan P.O. Box 98135-674 Zahedan Iran Department of Chemistry Yazd Branch Islamic Azad University Yazd Iran

A green,convenient,high yielding and one-pot procedure for the synthesis of novel spiro[benzo[α]pyrano[2,3-c]phenazine]derivatives by domino multi-component condensation reaction between 2-hydroxynaphthalene-l,4-dione,benzene-l,2-diamines,ninhydrine,and malononitrile in the presence of a catalytic amount of 1,3-dimethyl-7H-purine-2,6-dione（theophylline） as an expedient,eco-friendly and reusable solid base catalyst under thermal,microwave irradiation and solvent-free *** procedure has also been applied successfully for the synthesis of benzo[α]pyrano[2,3-c]phenazines.

关键词： Multi-component domino reactions(MDRs) Green chemistry Theophylline Spiro[benzo[α]pyrano[2 3-c]phenazine] Benzo[α]pyrano[2 3-c]phenazine

糖尿病患者血清胱抑素C和急性反应指标与视网膜病变严重程度相关性研究(英文)

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国际眼科杂志 2018年第3期18卷 412-417页

作者： Joobin Khadamy Gholamhossein Yaghoobi Abbas Hosseini Rad Mahnaz Najafi Saeed reza heydari Pardis Khademi 伊朗医科大学 Rassoul Akram医院眼科研究中心伊朗德黑兰*** Birjand医科大学 Vali-e-Asr医院眼科伊朗南呼罗珊省*** 马什哈德医科大学眼视光科伊朗Razavi Khorasan***

目的:评估糖尿病视网膜病变(DR)严重程度与血清胱抑素C和急性时相反应指标的相关性,包括红细胞沉降率(ESR)和超敏C反应蛋白(hs-CRP)。方法:研究纳入了1mo内就诊的所有糖尿病视网膜病患者。患者均记录人口统计学数据。行眼科检查,同时检... 详细信息

目的:评估糖尿病视网膜病变(DR)严重程度与血清胱抑素C和急性时相反应指标的相关性,包括红细胞沉降率(ESR)和超敏C反应蛋白(hs-CRP)。方法:研究纳入了1mo内就诊的所有糖尿病视网膜病患者。患者均记录人口统计学数据。行眼科检查,同时检测糖化血红蛋白(Hb A1c)、ESR、hs-CRP和血清胱抑素C水平。结果:研究包括67例糖尿病患者,其中19例(28.3%)无视网膜病变患者,22例(32.8%)非增殖型视网膜病变患者和26例(38.8%)增殖型视网膜病变患者。三组间平均年龄、性别分布、平均糖尿病病程、高血压和血脂异常患病率、吸烟状况以及Hb A1c水平无明显差异。随着视网膜病变发展,平均血清胱抑素C水平显著提高,三组分别为1.1±0.48,1.22±0.38,1.71±0.92(P=0.007)。在多元回归分析中,仅血清胱抑素C与糖尿病视网膜病变严重程度有关(P=0.025)。结论:研究表明,在独立于急性时相反应指标,血清胱抑素C水平随DR加重升高。因此,该结论可作为初级医护人员区分高危患者的标志。

关键词：血清胱抑素C 红细胞沉降率超敏C反应蛋白糖尿病视网膜病变炎症反应标志物急性时相反应物

Assessment of electrostatic discharge sensitivity of nitrogen-rich heterocyclic energetic compounds and their salts as high energy-density dangerous compounds:A study of structural variables

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Defence Technology（防务技术） 2024年第9期39卷 15-22页

作者： Mohammad Hossein Keshavarz Sedigheh heydari Bani reza Bakhtiari Seyyed Hesamodin Hosseini Faculty of Applied Sciences Malek Ashtar University of TechnologyIsfahan 177415875Iran

Nitrogen-rich heterocyclic energetic compounds(NRHECs)and their salts have witnessed widespread synthesis in recent *** substantial energy-density content within these compounds can lead to potentially dangerous explosive reactions when subjected to external stimuli such as electrical ***,developing a reliable model for predicting their electrostatic discharge sensitivity(ESD)becomes *** study proposes a novel and straightforward model based on the presence of specific groups(-NH_(2) or-NH-,-N=N^(+)-O^(-)and-NNO_(2),-ONO_(2) or-NO_(2))under certain conditions to assess the ESD of NRHECs and their salts,employing interpretable structural *** a comprehensive dataset comprising 54 ESD measurements of NRHECs and their salts,divided into 49/5 training/test sets,the model achieves promising *** Root Mean Square Error(RMSE),Mean Absolute Error(MAE),and Maximum Error for the training set are reported as 0.16 J,0.12 J,and 0.5 J,***,the ratios RMSE(training)/RMSE(test),MAE(training)/MAE(test),and Max Error(training)/Max Error(test)are all greater than 1.0,indicating the robust predictive capabilities of the *** presented model demonstrates its efficacy in providing a reliable assessment of ESD for the targeted NRHECs and their salts,without the need for intricate computer codes or expert involvement.

关键词： Electrostatic discharge sensitivity Heterocyclic energetic compounds containing azole compound Interpretable structural parameter Safety

Prioritizing woody species for the rehabilitation of arid lands in western Iran based on soil properties and carbon sequestration

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Journal of Arid Land 2020年第4期12卷 640-652页

作者： Masoud BAZGIR reza OMIDIPOUR Mehdi heydari Nasim ZAINALI Masoud HAMIDI Daniel C DEY Department of Water and Soil Engineering Faculty of AgricultureIlam UniversityIlam ***Iran Department of Range and Watershed Management Faculty of Natural Resource and Earth ScienceShahrekord UniversityShahrekord ***Iran Department of Forestry Faculty of AgricultureIlam UniversityIlam ***Iran US Forest Service Northern Research StationColumbiaOM 65211USA

Plants are an important component in many natural ecosystems. They influence soil properties, especially in arid ecosystems. The selection of plant species based on their adaptations to site conditions is essential for rehabilitation of degraded sites and other construction sites such as check-dams. Other factors to be considered in species selection include their effects on soil properties and their abilities to meet other management objectives. The purpose of this study was to assess the effects of native(Populus euphratica Oliv. and Tamarix ramosissima Ledeb.) and introduced(Eucalyptus camaldulensis Dehnh. and Prosopis juliflora(Swartz) DC.) woody species on soil properties and carbon sequestration(CS) in an arid region of Iran. Soil sampling was collected at three soil depths(0–10, 10–20 and 20–30 cm) at the sites located under each woody species canopy and in an open area in 2017. Soil physical-chemical property was analyzed in the laboratory. The presence of a woody species changed soil characteristics and soil CS, compared with the open area. For example, the presence of a woody species caused a decrease in soil bulk density, of which the lowest value was observed under E. camaldulensis(1.38 g/cm^3) compared with the open area(1.59 g/cm^3). Also, all woody species significantly increased the contents of soil organic matter and total nitrogen, and introduced species had more significant effect than native species. The results showed that CS significantly increased under the canopy of all woody species in a decreasing order of P. euphratica(9.08 t/hm^2)>E. camaldulensis(8.37 t/hm^2)>P. juliflora(5.20 t/hm^2)>T. ramosissima(2.93 t/hm^2)>open area(1.33 t/hm^2), thus demonstrating the positive effect of a woody species on CS. Although the plantation of non-native species had some positive effects on soil properties, we recommend increasing species diversity in plantations of native and introduced woody species to provide more diversity for the increased ecosystem

关键词： arid ecosystem carbon sequestration degraded soil restoration reforestation soil management

Effects of nitric oxide on reproductive organs and related physiological processes

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Asian pacific Journal of Reproduction 2020年第4期9卷 159-165页

作者： Ayoob Rostamzadeh reza Ahmadi Mahdi heydari Amir Raoofi Student Research Committee Department of Anatomical SciencesFaculty of MedicineIran University of Medical SciencesTehranIran Clinical Biochemistry Research Center Basic Health Sciences InstituteShahrekord University of Medical SciencesShahrekordIran Leishmaniasis Research Center Department of AnatomySabzevar University of Medical SciencesSabzevarIran

Nitric oxide(NO),a member of the reactive nitrogen species family,plays a role in several physiologic processes,including vasculogenesis and angiogenesis,growth and puberty,and senescence and *** plays an important role in the production of ovarian steroids,ovulation,and follicular *** other words,increased activity of nitric oxide synthase(NOS)leads to an increased amount of NO,which triggers production of prostaglandins and inflammatory cascades which facilitate follicular rupture and *** concentration elevation inhibits steroid synthesis in luteal and granulosa *** NO is a major paracrine mediator of various biological processes,as well as a key factor in both the reproductive cycle and embryo implantation,oversynthesis of NO in the uterus results in toxicity and inflammation in epithelial cells and immunorejection of *** the male physiological system,NO synthesized by NOS plays a major role in erectile function and androgen secretion,as well as semen parameters,and oocyte junction to the ***,this supposedly simple molecule is involved in a number of other functions,such as germ cell evolution,connections between sertoli cells and germ cells in the blood-testis barrier,homodynamic contraction,and germ cell ***,NO is considered a key factor in male fertility due to its widespread distribution in both normal and diseased testis *** difference of expression level of NOS in normal and pathological states is a probable cause of fertility destructive processes.

关键词： Reproduction Nitric oxide Nitric oxide synthase Cell signaling Oxidants

Interaction between climate and management on beta diversity components of vegetation in relation to soil properties in arid and semi-arid oak forests, Iran

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Journal of Arid Land 2019年第1期11卷 43-57页

作者： heydari MEHDI Aazami FATEMEH Faramarzi MARZBAN Omidipour reza Bazgir MASOUD Pothier DAVID Prévosto BERNARD Department of Forest Science College of Agriculture Ilam University Department of Rangeland and Watershed Management College of Agriculture Ilam University Department of Rangeland and Watershed Management College of Natural Resources and Earth Sciences Shahrekord University Department of Soil Science College of Agriculture Ilam University Department of Wood and Forest Sciences Centre for Forest Research Laval University Irstea-National Research Institute of Science and Technology for Environment and Agriculture

This study aimed to investigate the interaction between regions with different climatic conditions(arid vs. semi-arid) and management(protected vs. unprotected) on the turnover and nestedness of vegetation in relation to physical, chemical and biological properties of soils in the Ilam Province of Iran. In each of the two regions, we sampled 8 sites(4 managed and 4 unmanaged sites) within each of which we established 4 circular plots(1000 m^2) that were used to investigate woody species, while two micro-plots(1 m×1 m) were established in each 1000-m^2 plot to analyze herbaceous species. In each sample unit, we also extracted three soil samples(0–20 cm depth) for measuring soil properties. The results indicated that the interaction between region and conservational management significantly affected the percent of canopy cover of Persian oak(Quercus brantii Linddl), soil respiration, substrate-induced respiration, as well as beta and gamma diversities and turnover of plant species. The percent of oak canopy cover was positively correlated with soil silt, electrical conductivity, available potassium, and alpha diversity, whereas it was negatively correlated with plant turnover. In addition, plant turnover was positively related to available phosphorus, while nestedness of species was positively related to organic carbon and total nitrogen. According to these results, we concluded that physical, chemical, and biological characteristics of limited ecological niche generally influenced plant diversity. Also, this study demonstrated the major contribution of the beta diversity on gamma diversity, especially in semi-arid region, because of the higher heterogeneity of vegetation in this area.

关键词： climatic conditions conservation management beta diversity oak forests physical-chemical property semi-arid region

Serendipity in Recommender Systems:A Systematic Literature Review

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Journal of Computer Science & Technology 2021年第2期36卷 375-396页

作者： reza Jafari Ziarani reza Ravanmehr Department of Computer Engineering Central Tehran BranchIslamic Azad UniversityTehran ***Iran

A recommender system is employed to accurately recommend items,which are expected to attract the user's *** over-emphasis on the accuracy of the recommendations can cause information over-specialization and make recommendations boring and even *** and diversity are two partly useful solutions to these ***,novel and diverse recommendations cannot merely ensure that users are attracted since such recommendations may not be relevant to the user's ***,it is necessary to consider other criteria,such as unexpectedness and *** is a criterion for making appealing and useful *** usefulness of serendipitous recommendations is the main superiority of this criterion over novelty and *** bulk of studies of recommender systems have focused on serendipity in recent ***,a systematic literature review is conducted in this paper on previous studies of serendipity-oriented recommender ***,this paper focuses on the contextual convergence of serendipity definitions,datasets,serendipitous recommendation methods,and their evaluation ***,the trends and existing potentials of the serendipity-oriented recommender systems are discussed for future *** results of the systematic literature review present that the quality and the quantity of articles in the serendipity-oriented recommender systems are progressing.

关键词： systematic literature review recommender system serendipity evaluation metric evaluation method

Cooperative Neuro Adaptive Control of Leader Following Uncertain Multi-Agent Systems with Unknown Hysteresis and Dead-Zone

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Journal of Systems Science & Complexity 2020年第2期33卷 312-332页

作者： SHAHNAZI reza Department of Electrical Engineering Faculty of EngineeringUniversity of GuilanRasht ***Iran

In this paper,a cooperative adaptive control of leader-following uncertain nonlinear multiagent systems is *** communication network is weighted undirected graph with fixed *** uncertain nonlinear model for each agent is a higher-order integrator with unknown nonlinear functions,unknown disturbances and unknown input ***,the gains of input actuators are unknown nonlinear functions with unknown *** most common behaviors of input actuators in practical applications are hysteresis and *** this paper,backlash-like hysteresis and dead-zone are used to model the input *** universal approximation theorem proved for neural networks,the unknown nonlinear functions are *** unknown weights of neural networks are derived by proposing appropriate adaptive *** cope with modeling errors and disturbances an adaptive robust structure is *** Lyapunov synthesis approach not only all the adaptive laws are derived but also it is proved that the closed-loop network is cooperatively semi-globally uniformly ultimately bounded(CSUUB).In order to investigate the effectiveness of the proposed method,it is applied to agents modeled with highly nonlinear mathematical equations and inverted *** results demonstrate the effectiveness and applicability of the proposed method in dealing with both numerical and practical multi-agent systems.

关键词： Adaptive neural network backlash-like hysteresis dead-zone leader-following multi-agent systems weighted undirected graph