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A novel Ga(Ⅲ)coordination complex as an efficient sensitizer for enhancing photocatalytic activity of TiO_(2)/rGO nanocomposite

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Journal of Rare Earths 2023年第7期41卷 1004-1013,I0002页

作者： amir hossein Cheshme Khavar Neda Khedri Rubén Rizo Juan Miguel Feliu Martínez Ali Reza Mahjoub Masoumeh Doolabi Ehsan Aghayani Department of Chemistry Farhangian UniversityTehranIran Department of Chemistry Faculty of Basic SciencesTarbiat Modares UniversityTehranIran Instituto de Electroquímica y Departamento de Química Física Universidad de Alicante03080AlicanteSpain Research Center for Environmental Contaminants Abadan University of Medical SciencesAbadanIran Department of Environmental Health Engineering Abadan University of Medical SciencesAbadanIran

Narrow solar-light response range and rapid charges recombination are the main technical barriers in TiO_(2) photocatalysis *** overcome these restrictions,in this work we synthesized a novel binuclear gadolinium(Ⅲ) coordination complex,[Gd_(2)(DPDB)_6(DMF)_6(H_(2)O_()2)](DPDB=[(4-dimethylamino)phenyldiazenyl] benzenesulfonate),which was used as an inorganic sensitizer for boosting the visible light-harvesting and quantum efficiency of TiO_(2) supported-reduced graphene oxide(rGO) *** structure of [Gd_(2)(DPDB)_6(DMF)_6(H_(2)O)_(2)](Gd-CMP) was determined from single-crystal X-ray diffraction data,which indicates three-dimensional(3D) supramolecular architecture through hydrogen bonding and CH…π_(ph) *** prepared nanohybrid(Gd-CMP/TG) reveals significantly enhanced visible-light-induced photocatalytic activity for degradation of acetaminophen(ACT).The complete removal of 10 mg/L ACT is achieved over Gd-CMP/TG,and the corresponding rate constant of ACT degradation of nanohybrid is 40-fold higher than that of bare TiO_(2).In prepared ternary nanohybrid,metal-coordination sensitizer(Gd-CMP) acts as an electron donor,and at the same time,rGO serves as an electron acceptor,and the synergistic effect between them efficiently enhances charges separation and inhibits e/h pair recombination in the hybridized *** radical scavenger tests indicate that the photo-induced O_(2)^(-·) radicals dominate ACT *** the basis of the experimental results and calculated energy of electronic levels,a possible mechanism for the improved photocatalytic activity is discussed.

关键词： Gadolinium Coordination complex Sensitizer Photocatalytic Light-harvesting Rare earths

Numerical study on cavitation in a globe control valve with different numbers of anti-cavitation trims

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Journal of Central South University 2018年第11期25卷 2677-2687页

作者： Hamidreza YAGHOUBI Seyed amir hossein MADANI Mansour ALIZADEH Department of Mechanical Engineering Iran University of Science and TechnologyTehran 16846-13114Iran

Cavitation is a destructive phenomenon in control *** order to delay cavitation,a multi-series of perforated cylindrical plates,called trims,are ***,the effects of orifice diameter and different types of trims have been *** this study,by numerical analysis,a globe control valve was investigated by employing four different cases(without trim,with one trim,with two and three trims)and the impact of the number of these trims on the intensity,formation region and the initiation point of cavitation was *** was found that the addition of one stage or two stages of trims reduces the intensity and delays the onset of cavitation,relative to the valve without ***,no significant differences in terms of intensity and initiation point of cavitation were observed in the cases where two or three trims were ***,due to the high cost of producing the trims,and the severe drop in flow coefficient,it is not economically and technically justified to increase the number of trims to more than three.

关键词： numerical analysis anti-cavitation trim globe control valve

Therapeutic effects of acupuncture on blood glucose level among patients with type-2 diabetes mellitus: A randomized clinical trial

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Journal of Traditional Chinese Medical Sciences 2019年第1期6卷 101-107页

作者： amir Hooman Kazemi Wei Wang Yanping Wang Faezeh Khodaie hossein Rezaeizadeh School of Persian Medicine Tehran University of Medical SciencesTehranIran School of Chinese Medicine Beijing University of Chinese MedicineBeijing 100029China School of Acupuncture Moxibustion and TuinaBeijing University of Chinese MedicineBeijing 100029China

Objective:To compare the therapeutic effects of acupuncture with sham acupuncture on levels of fasting plasma glucose (FPG) and glycated hemoglobin (HbA1c) among patients with type-2 diabetes mellitus (T2DM) under treatment with ***:Eighty participants with T2DM were allocated randomly to treatment (n =40) and control (n =40) *** addition to metformin therapy,patients in the acupuncture group received acupoint stimulation with even manipulation at 15 acupoints,and needles were retained for 20 *** sham-acupuncture group was treated with very small needles inserted at a very shallow depth (3-5 mm) without manipulation at non-acupoints 1 cm around the actual acupuncture *** groups were treated for 14 sessions during 10 weeks of *** FPG level was measured before treatment as well as after 1,2,4,6 and 12 weeks of *** HbA1c percentage was assessed once before treatment and once 12 weeks after treatment ***:Levels of FPG and HbA1c in both groups were reduced significantly in comparison with baseline measurements (both P <.01).However,acupuncture treatment led to a significant reduction in the FPG level as compared with sham acupuncture after 4 weeks or 10 sessions of treatment [mean difference (MD) =10.18,95% confidence interval (CI) =1.74 to 18.6,P =.019],after 6 weeks or 12 sessions of treatment (MD =10.53,95% CI =2.22 to 18.83,P =.014) and after 12-week follow-up (MD =8.8,95% Cl =0.66 to 16.94,P =.034).Acupuncture treatment reduced the HbA1c level significantly in comparison with that in the shamacupuncture group (MD =0.27,95%Cl =0.08 to 0.47,P =.007).Conclusion:Our study revealed that acupuncture (as a type of Chinese therapy) combined with metformin (as a conventional hypoglycemic medication) had a greater effect on glycemic control than that elicited in the placebo control ***,acupuncture could be used as adjuvant therapy among patients with T2DM.

关键词： Diabetes mellitus type 2 Acupuncture Glycated hemoglobin

Enhanced Sensitivity and Stability in Gelatin-Based Fricke gel Dosimeters:Impact of Benzoic Acid on Low-Dose Radiation Measurements

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Instrumentation 2024年第3期11卷 23-29页

作者： Seyed amir Saeedi-Sini Sedigheh Sina Mohammad hossein Sadeghi Ebrahim Farajzadeh Nuclear Engineering Department School of Mechanical EngineeringShiraz UniversityShirazIran Radiation Research Center School of Mechanical EngineeringShiraz UniversityShirazIran Secondary Standard Dosimetry Laboratory(SSDL) Pars Isotope Co.KarajIran

Fricke gel dosimetry is a critical technique for accurate radiation dose measurement, leveraging the radiation-induced oxidation of ferrous to ferric ions within a hydrogel matrix. This study aimed to advance the field by preparing and evaluating seventy-one Fricke gel dosimeter(FGD) samples with varying chemical compositions, focusing on the incorporation of benzoic acid. Two gelatin-based samples demonstrated superior sensitivity, particularly for low-dose measurements. Our findings indicated that the sample without benzoic acid exhibited a 1.75 times higher sensitivity compared to the sample containing benzoic acid, with lower limits of detection at 0.04 Gy and 0.1 Gy, respectively. Stability tests revealed temperature-dependent responses, with better performance observed under refrigerated conditions. Reproducibility was confirmed through consistent calibration curves across multiple trials. Additionally, the dosimeters' responses varied with different radiation types, underscoring the need for specific calibrations. The study concludes that while benzoic acid slightly reduces sensitivity, it provides consistent responses across various radiation energies, suggesting its potential as a beneficial additive in diverse clinical scenarios. This research contributes to the ongoing optimization of FGDs for precise radiation dose assessment.

关键词： chemical dosimeter freak dosimeter benzoic acid

How much do you know about the methods for determining onset of asphaltene precipitation?

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Petroleum 2017年第3期3卷 287-291页

作者： Mohammad Mahdi Shadman amir hossein Saeedi Dehaghani Mohammad Hasan Badizad Faculty of Chemical Engineering Tarbiat Modares UniversityP.O.Box:14155-4838TehranIran

One of the major problems in all area of petroleum industry,including production,operation,storage and transportation,is formation of heavy organic compounds,e.g.,asphaltene and wax,and their consequent deposition in equipment and *** in crude oil composition,temperature and pressure leads to asphaltene ***,it is of vital importance to determine onset of asphaltene precipitation during oil *** this regard,various techniques have been suggested in literature,each with its own pros and ***,from practical point of view,one needs to decide which method serves to be proper *** this end,present study gives a comprehensive critical review for different techniques serve to determine onset of asphaltene precipitation along with comparing their advantages and *** each method presents its own definition for onset,such as onset of precipitation,clustering and deposition;it is necessary to distinguish their difference based on underlying physical *** was concluded that mechanism of asphaltene precipitation for determining onset of asphaltene precipitation plays a substantial role.

关键词： Asphaltene Precipitation Flocculation Clustering Deposition

A review on source,occurrence,and impacts of microplastics in freshwater aquaculture systems in China

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Water Biology and Security 2022年第3期1卷 1-9页

作者： Chenxi Wu Xiong Xiong amir hossein Hamidian Yulan Zhang Xiangrong Xu State Key Laboratory of Freshwater Ecology and Biotechnology Institute of HydrobiologyChinese Academy of SciencesWuhan430072China Department of Environmental Science and Engineering Faculty of Natural ResourcesUniversity of Tehran31587-77878Iran State Key Laboratory of Cryospheric Science Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou730000China CAS Key Laboratory of Tropical Marine Bio-resources and Ecology Guangdong Provincial Key Laboratory of Applied Marine BiologySouth China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou510301China

Microplastic pollution has become an increasingly important environmental issue worldwide in recent years because of its ubiquitous presence in different environmental media and its potential to affect the health of organisms and *** contributes significantly to the world's food production and nutritional supply,especially in developing *** occurrence of microplastics in aquaculture systems has raised great concern regarding aquaculture production and food safety issues of aquaculture *** is a world leader in aquaculture production,with freshwater aquaculture accounting for 59.1%of total aquaculture production of the world in ***,this review mainly focuses on recent research progress related to microplastic pollution in freshwater aquaculture systems in *** from the literature show that microplastics are present in freshwater aquaculture systems at abundances comparable to natural waterbodies in *** can be ingested and remain in the body of aquaculture *** to microplastics can adversely affect the health of aquatic organisms and aquatic ecosystem ***,risks of microplastics in real world environment remain *** of freshwater aquaculture products is not a major pathway for human exposure to *** provide scientific guidance for governmental decision-making and pollution control,future work should focus on progress in toxicological methodology and understanding the impacts of microplastics at community and ecosystem levels.

关键词： Pond aquaculture Pollution characteristics Aquatic product Exposure risks Microplastics

Vienna Talks for the Removal of Sanctions

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Beijing Review 2021年第50期64卷 20-21页

作者： hossein amir-Abdollahian Foreign Affairs of the Islamic Republic of Iran

Iran is serious,acts in good faith and considers the practical and tangible result to be the removal of *** path traveled The path taken during six rounds of intensive negotiations in Vienna did not lead to success due to the excessive demands and unrealistic stances on the part of the United *** we are starting a new round of talks.

关键词： travel starting Vienna

Effects of Eriobotrya japonica(Lindl.) flower extracts on mercuric chloride-induced hepatotoxicity in rats

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Chinese Science Bulletin 2012年第30期57卷 3891-3897页

作者： ESMAEILI amir hossein KHAVARI-NEJAD Ramazan Ali HAJIZADEH MOGHADDAM Akbar CHAICHI Mohammad Javad EBRAHIMZADEH Mohammad Ali Department of Biology Science and Research BranchIslamic Azad UniversityBox 14515-775TehranIran Faculty of Basic Science University of MazandaranBox 47416-95448BabolsarIran Faculty of Chemistry University of MazandaranBox 47416-95447BabolsarIran Pharmaceutical Sciences Research Center School of PharmacyMazandaran University of Medical SciencesSari 48189Iran

Mercury(II) is an important factor in hepatotoxicity that can enter the body through marine diets and *** the present study,the protective effect of the Eriobotrya japonica flower extract(EJFE) on HgCl 2-induced hepatotoxicity was *** mg/kg of mercuric chloride in drinking water was given to rats either with saline or EJFE(100 and 200 mg/kg as intraperitoneal(IP)) for 30 *** mercury levels in different groups of liver tissues of the rats were measured with flameless atomic absorption spectroscopy(F-AAS).Also,mercury accumulation in the liver of the rats was modeled by using a parallel chemical kinetic *** results showed that HgCl 2-induced oxidative damage led to a significant decrease in glutathione(GSH) and the total antioxidant capacity(TAC) levels,and to a significant increase in lipid peroxidation *** mercury was 14.47% more in the livers of the stress groups than in those of the control groups(P<0.001),whereas the amount of Hg was adjusted to 13.49% and 13.93% in groups treated with 100 and 200 mg/kg of EJFE respectively,as compared with stress groups(P<0.001).HPLC analysis of EJFE revealed that hesperetin and gallic acid are the major antioxidants in *** demonstrate that flowers of the Eriobotrya japonica cause a significant protection against HgCl 2 induced hepatotoxicity in all diagnostic parameters by strengthening the antioxidant defense mechanisms and they may have a therapeutic function in free radical mediated diseases.

关键词：氯化汞大鼠肝提取物枇杷诱导火焰原子吸收光谱法总抗氧化能力化学动力学模型

绿色可磁性分离二氧化硅包裹镍铁尖晶石负载硫酸氢铁纳米粒子催化剂用于合成1,8-二氧十氢吖啶合成(英文)

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催化学报 2014年第3期35卷 376-382页

作者： amir Khojastehnezhad Mohammad Rahimizadeh hossein Eshghi Farid Moeinpour Mehdi Bakavoli Department of Chemistry Faculty of Sciences Ferdowsi University of Mashhad Mashhad Iran Department of Chemistry Islamic Azad University-Bandar Abbas Branch Bandar Abbas *** Iran

A new magnetically separable catalyst consisting of ferric hydrogen sulfate supported on silica-coated nickel ferrite nanoparticles was *** synthesized catalyst was characterized using vibrating sample magnetometry,X-ray diffraction,transmission electron microscopy,scanning electron microscopy,and Fourier transform infrared *** new magnetic catalyst was shown to be an efficient heterogeneous catalyst for the synthesis of 1,8- dioxodecahydroacridines under solvent-free *** catalyst is readily recovered by simple magnetic decantation and can be recycled several times with no significant loss of catalytic activity.

关键词：催化剂包镍铁氧体硫酸氢磁性分离纳米粒子二氧化硅合成铁素体