Catalytic performance of hematite nanostructures prepared by N2 glow discharge plasma in heterogeneous Fenton-like process for acid red 17 degradation

Alireza Khataee,Peyman Gholami,Behrouz Vahid 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.50 No.-

Plasma-treated hematite (PTH) nanostructures were produced from natural hematite (NH) using N2plasma considering its cleaning and sputtering effects which lead to larger surface area. The NH and PTHwere characterized by XRD, FT-IR, SEM, EDX, XPS, and BET methods. The catalytic activity of the PTH inheterogeneous Fenton-like process was higher than the NH for degradation of Acid Red 17. The GC–Masstechnique was used to recognize some of the intermediates and a possible degradation pathway wasproposed. Environment-friendly preparation of the catalyst, insignificant leaked iron concentration andsuccessive usages at milder pH were the substantial advantages of the PTH.

On the generalized principally injective modules

Fatemeh Gholami,Zohreh Habibi,Alireza Najafizadeh 대한수학회 2024 대한수학회보 Vol.61 No.2

Some results are generalized from principally injective rings to principally injective modules. Moreover, it is proved that the results are valid to some other extended injectivity conditions which may be defined over modules. The influence of such injectivity conditions are studied for both the trace and the reject submodules of some modules over commutative rings. Finally, a correction is given to a paper related to the subject.

Preparation of nanostructured pyrite with N₂ glow discharge plasma and the study of its catalytic performance in the heterogeneous Fenton process

Khataee, Alireza,Gholami, Peyman,Sheydaei, Mohsen,Khorram, Sirous,Joo, Sang Woo CNRS 2016 NEW JOURNAL OF CHEMISTRY Vol.40 No.6

<P>Pyrite nanostructures were prepared from pyrite ore particles using a simple and practical plasma treatment process based on the N-2 sputtering technique. The nanostructures were characterized using different techniques, such as XRD, FT-IR, SEM, EDX, XPS, and BET analysis. The performance of the plasma-treated pyrite (PTP) was investigated as a new efficient catalyst for the decolorization of reactive orange 29 (RO29) by the heterogeneous Fenton process in a batch system. 97.6% decolorization was observed in the PTP/H2O2 process, which was higher than the 38.4% decolorization efficiency of the untreated pyrite/H2O2 process. The effects of the operational parameters on the decolorization efficiency were examined, and the 97.6% decolorization efficiency was obtained with an initial RO29 concentration of 20 mg L-1, H2O2 concentration of 3 mM, catalyst dosage of 2 g L-1, pH 5, and reaction time of 90 min. The result obtained from the successive application of PTP in the heterogeneous Fenton processes improved the stability of the catalyst in long-term applications. A plausible degradation pathway of RO29 is proposed based on gas chromatography-mass spectroscopy analysis to explain the improved degradation of RO29 through the PTP/H2O2 process.</P>

Complications and Carcinogenic Effects of Mustard Gas - a Systematic Review and Meta-Analysis in Iran

Panahi, Yunes,Gholami, Nasrin,Ghojazadeh, Morteza,Moslemi, Farnaz,Naghavi-Behzad, Mohammad,Azami-Aghdash, Saber,Ghaffari, Alireza,Piri, Reza Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.17

Background: Catastrophic effects of mustard gas as a chemical warfare agent have always been a major problem for those exposed to this agent. In this meta-analysis it was tried to evaluate carcinogenesis, ocular, cutaneous and respiratory complications of mustard gas exposure among Iranians who had been exposed to this agent during the Iran-Iraq war. Materials and Methods: In this meta-analysis, the required data were collected using keywords "mustard gas", "sulfur mustard", "cancer", "neoplasm", "respiratory complications", "ocular complications", "lung disease", "chronic complication", "eye", "skin", "cutaneous complication", "carcinogenesis" and their combination with keywords "Iran", "Iranian", "prevalence", "mortality" and their Farsi equivalent terms from the databases of SID, Iranmedex, Magiran, Pubmed, Science Direct, Google Search engine, Gray Literature and Reference of References. To determine the prevalence of each complication and perform meta-analysis, CMA: 2 (Comprehensive Meta-Analysis) software with a randomized model was used. Results: Of the 542 articles found, 7 national articles, consistent with the aims of this study were selected. Meta-analysis of seven papers revealed that cancer risk, especially cancer of the respiratory system was elevated, so that the relative risk (RR) of cancer role of mustard gas was inconsistent from 2/1 to 4 in this survey. Also prevalence of delayed skin disorders due to sulfur mustard was 94.6%, pulmonary complications 94.5% and ocular complications 89.9%. The incidence of various cancers in victims exposed to mustard gas was 1.7% worldwide where the rate was 2.2% in Iranian victims of the Iraq-Iran war. Conclusions: Based on present study the prevalence of delayed mustard gas related cutaneous, pulmonary and ocular complications is above 90% and risk of carcinogenesis is higher in comparison to worldwide statistics. This may suggest need for long-term and persistent follow-up and rehabilitation procedures for populations exposed to this agent.

Natural Infection with Rabies Virus: A Histopathological and Immunohistochemical Study of Human Brains

Firouzeh Farahtaj,Amir Ghaemi,Alireza Gholami,Alireza Tahamtan,Sadegh Shirian,Maryam Fazeli,Amir Sasan Mozaffari Nejad,Ali Gorji,Hamid Mahmoudzadeh-Niknam,Leila Alizadeh 질병관리본부 2019 Osong Public Health and Research Persptectives Vol.10 No.1

Objectives: Despite all the efforts and increased knowledge of rabies, the exact mechanisms of infection and mortality from the rabies virus are not well understood. To understand the mechanisms underlying the pathogenicity of rabies virus infection, it is crucial to study the tissue that the rabies virus naturally infects in humans. Methods: Cerebellum brain tissue from 9 human post mortem cases from Iran, who had been infected with rabies virus, were examined histopathologically and immunohistochemically to evaluate the innate immune responses against the rabies virus. Results: Histopathological examination revealed inflammation of the infected cerebellum and immunohistochemical analyses showed an increased immunoreactivity of heat shock protein 70, interleukin-6, interleukin-1, tumor necrosis factor-alpha, caspase-3, caspase-9, toll-like receptor3 and toll-like receptor4 in the infected brain tissue. Conclusion: These results indicated the involvement of innate immunity in rabies infected human brain tissue, which may aggravate the progression of this deadly disease.

Ki-67/MIB-1 as a Prognostic Marker in Cervical Cancer - a Systematic Review with Meta-Analysis

Piri, Reza,Ghaffari, Alireza,Gholami, Nasrin,Azami-Aghdash, Saber,PourAli-Akbar, Yasmin,Saleh, Parviz,Naghavi-Behzad, Mohammad Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.16

Background: In cervical cancer patients it has been reported that there in a significant Ki-67/MIB-1 expression is correlated with survival in cervical cancer patients. However, the prognostic value is still not well understood. Materials and Methods: In the present meta-analysis the prognostic value of Ki-67/MIB-1 with regard to overall survival (OS) and disease-free survival (DFS) in cervical cancer was investigated. The databases of PubMed, ISI Web of Science, Cochrane Central Register of Controlled Trials, EMBASE, Science Direct and Wiley Online Library were used to identify appropriate literature. Results: In order to explore the relationship between Ki-67/MIB-1 and cervical cancer, we have included 13 studies covering 894 patients in the current meta-analysis. The effect of Ki-67/MIB-1 on OS for pooled random effects HR estimate was 1.63 (95%confidence interval (CI) 1.09-2.45; P<0.05). The pooled HR for DFS was 1.26 (95%CI 0.58-2.73; P>0.05) and the subgroup analysis indicated Ki-67/MIB1 was associated with DFS (HR=3.67, 95%CI 2.65-5.09) in Asians. Conclusions: According to this meta-analysis, Ki-67/MIB-1 has prognostic value for OS in patients suffering from cervical cancer. For better evaluation of the prognostic role of Ki-67/MIB-1 on DFS, studies with larger numbers of patients are needed to validate present findings in the future.

Caffeine attenuates spermatogenic disorders in mice with induced chronic scrotal hyperthermia

Amir Raoofi,Omid Gholami,Hossein Mokhtari,Fatemeh Bagheri,Auob Rustamzadeh,Davood Nasiry,Alireza Ghaemi The Korean Society for Reproductive Medicine 2024 Clinical and Experimental Reproductive Medicine Vol.51 No.1

Objective: Chronic scrotal hyperthermia (SHT) can lead to serious disorders of the male reproductive system, with oxidative stress playing a key role in the onset of these dysfunctions. Thus, we evaluated the impact of caffeine, a potent antioxidant, on cellular and tissue disorders in mice with chronic SHT. Methods: In this experimental study, 56 adult male NMRI mice were allocated into seven equal groups. Apart from the non-treated control group, all were exposed to heat stress. Two groups, termed "preventive" and "curative," were orally administered caffeine. The preventive mice began receiving caffeine immediately prior to heat exposure, while for the curative group, a caffeine regimen was initiated 15 consecutive days following cessation of heat exposure. Each treated group was subdivided based on pairing with a positive control (Pre/ curative [Cur]+PC) or a vehicle (Pre/Cur+vehicle). Upon conclusion of the study, we assessed sperm characteristics, testosterone levels, stereological parameters, apoptosis, antioxidant and oxidant levels, and molecular markers. Results: Sperm parameters, testosterone levels, stereological parameters, biochemical factors (excluding malondialdehyde [MDA]), and c-kit gene expression were significantly elevated in the preventive and curative groups, especially the former, relative to the other groups. Conversely, expression levels of the heat shock protein 72 (HSP72) and nuclear factor kappa beta (NF-κβ) genes, MDA levels, and apoptotic cell density were markedly lower in both caffeine-treated groups relative to the other groups, with more pronounced differences observed in the preventive group. Conclusion: Overall, caffeine attenuated cellular and molecular abnormalities induced by heat stress in the testis, particularly in the mice treated under the preventive condition.

Shape-controlled synthesis of zinc nanostructures mediating macromolecules for biomedical applications

Seyyed Mojtaba Mousavi,Gity Behbudi,Ahmad Gholami,Seyyed Alireza Hashemi,Zohre Mousavi Nejad,Sonia Bahrani,Wei-Hung Chiang,Lai Chin Wei,Navid Omidifar 한국생체재료학회 2022 생체재료학회지 Vol.26 No.1

Zinc nanostructures (ZnONSs) have attracted much attention due to their morphological, physicochemical, and electrical properties, which were entailed for various biomedical applications such as cancer and diabetes treatment, anti-inflammatory activity, drug delivery. ZnONS play an important role in inducing cellular apoptosis, triggering excess reactive oxygen species (ROS) production, and releasing zinc ions due to their inherent nature and specific shape. Therefore, several new synthetic organometallic method has been developed to prepare ZnO crystalline nanostructures with controlled size and shape. Zinc oxide nanostructures’ crystal size and shape can be controlled by simply changing the physical synthesis condition such as microwave irradiation time, reaction temperature, and TEA concentration at reflux. Physicochemical properties which are determined by the shape and size of ZnO nanostructures, directly affect their biological applications. These nanostructures can decompose the cell membrane and accumulate in the cytoplasm, which leads to apoptosis or cell death. In this study, we reviewed the various synthesis methods which affect the nano shapes of zinc particles, and physicochemical properties of zinc nanostructures that determined the shape of zinc nanomaterials. Also, we mentioned some macromolecules that controlled their physicochemical properties in a green and biological approaches. In addition, we present the recent progress of ZnONSs in the biomedical fields, which will help centralize biomedical fields and assist their future research development.