Treatment of industrial wastewater contaminated with recalcitrant metal working fluids by the photo-Fenton process as post-treatment for DAF

Mohammad Mehdi Amin,Mohammad Mehdi Golbini Mofrad,Hamidreza Pourzamani,Seyed Mohammad Sebaradar,Karim Ebrahim 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.45 No.-

Post-treatment of the industrial wastewater polluted by metalworkingfluids (MWFs) was performedusing the photo-Fenton process in following of the chemical addition-dissolved airflotation (CA-DAF)unit. Prior to this study, the CA-DAF was operated as full-scale by trial and error. For the photo-Fentonprocess as a pilot-scale batch reactor, initial pH value, FeSO4, and H2O2 concentrations were considered tostudy the effect of different operating conditions on chemical oxygen demand (COD) and total petroleumhydrocarbon (TPH) removals. This hybrid approach revealed removal efficiencies of 99.85% and 98.9% forCOD and TPH in the optimized photo-Fenton process as pH 3, FeSO4: 100 mg/l, and H2O2: 17.8 g/l. The CODdegradation results for the photo-Fenton system indicated that it could be wellfit using a pseudofirstorderkinetic model. By the GC–MS analysis of DAF and applied photo-Fenton effluents, a 73% removalrate of mono(2-ethylhexyl) phthalate was detected. It is likely favorable to increase the biodegradability. The cost analysis of this process for the consumed energy (6 kWh) and chemicals (0.01818 kg FeSO4 and17.15 kg H2O2) was estimated at approximately 26 $ per 1 m3 of DAF effluent. Generally, these resultsimply that the CA-DAF unit followed by photo-Fenton is an effective and practical method for treatingMWFs wastewater.

The Mediating Role of Organizational Learning in the Relationship of Organizational Intelligence and Organizational Agility

Mohammad Amin Bahrami,Mohammad Mehdi Kiani,Raziye Montazeralfaraj,Hossein Fallah Zadeh,Morteza Mohammad Zadeh 질병관리본부 2016 Osong Public Health and Research Persptectives Vol.7 No.3

Objectives: Organizational learning is defined as creating, absorbing, retaining, transferring, and application of knowledge within an organization. This article aims to examine the mediating role of organizational learning in the relationship of organizational intelligence and organizational agility. Methods: This analytical and cross-sectional study was conducted in 2015 at four teaching hospitals of Yazd city, Iran. A total of 370 administrative and medical staff contributed to the study. We used stratified-random method for sampling. Required data were gathered using three valid questionnaires including Alberkht (2003) organizational intelligence, Neefe (2001) organizational learning, and Sharifi and Zhang (1999) organizational agility questionnaires. Data analysis was done through R and SPSS 18 statistical software. Results: The results showed that organizational learning acts as a mediator in the relationship of organizational intelligence and organizational agility (path coefficient = 0.943). Also, organizational learning has a statistical relationship with organizational agility (path coefficient = 0.382). Conclusion: Our findings suggest that the improvement of organizational learning abilities can affect an organization’s agility which is crucial for its survival.

Free vibration analysis of sandwich FGM shells using isogeometric B spline finite strip method

Mohammad Amin Shahmohammadi,Mojtaba Azhari,Mohammad Mehdi Saadatpour 국제구조공학회 2020 Steel and Composite Structures, An International J Vol.34 No.3

This paper presents a free vibration analysis of shell panels made of functionally graded material (FGM) in the form of the ordinary and sandwich FGM and laminated shells using the isogeometric B3-spline finite strip method (IG-SFSM). B3-spline and Lagrangian interpolation are employed along the longitudinal and transverse directions respectively in this type of finite strip. The introduced finite strip formulation is based on the degenerated shell method, which provides variable thickness, arbitrary geometries, and analysis of thin or thick shells. Validity of the obtained natural frequencies by IG-SFSM is checked by comparison with results extracted from references for similar cases in different examples. These examples incorporate several geometries, materials, boundary conditions, and continuous thickness variation. A comparison of these two kinds of results and their proximity showed that the introduced IG-SFSM is a reliable tool which can be used in analysis of shells with the aforementioned properties.

Evaluation of the role of TAX, HBZ, and HTLV-1 proviral load on the survival of ATLL patients

Mohammad Mehdi Akbarin,Abbas Shirdel,Alireza Bari,Seyedeh Tahereh Mohaddes,Houshang Rafatpanah,Ehsan Ghayour Karimani,Kobra Etminani,Amin Golabpour,Reza Torshizi 대한혈액학회 2017 Blood Research Vol.52 No.2

Background: Adult T-cell leukemia/lymphoma (ATLL) is an aggressive malignancy with very poor prog-nosis and short survival, caused by the human T-lymphotropic virus type-1 (HTLV-1). The HTLV-1 biomarkers trans-activator x (TAX) and HTLV-1 basic leucine zipper factor (HBZ) are main oncogenes and life-threatening elements. This study aimed to assess the role of the TAX and HBZ genes and HTLV-1 proviral load (PVL) in the survival of patients with ATLL. Methods: Forty-three HTLV-1-infected individuals, including 18 asymptomatic carriers (AC) and 25 ATLL patients (ATLL), were evaluated between 2011 and 2015. The mRNA expression of TAX and HBZ and the HTLV-1 PVL were measured by quantitative PCR. Results: Significant differences in the mean expression levels of TAX and HBZ were observed be-tween the two study groups (ATLL and AC, P=0.014 and P=0.000, respectively). In addi-tion, the ATLL group showed a significantly higher PVL than AC (P=0.000). There was a significant negative relationship between PVL and survival among all study groups (P=0.047). Conclusion: The HTLV-1 PVL and expression of TAX and HBZ were higher in the ATLL group than in the AC group. Moreover, a higher PVL was associated with shorter survival time among all ATLL subjects. Therefore, measurement of PVL, TAX, and HBZ may be beneficial for monitoring and predicting HTLV-1-infection outcomes, and PVL may be useful for prog-nosis assessment of ATLL patients. This research demonstrates the possible correlation between these virological markers and survival in ATLL patients.

Free vibration analysis of thick cylindrical MEE composite shells reinforced CNTs with temperature-dependent properties resting on viscoelastic foundation

Mehdi Mohammadimehr,Ehsan Arshid,Seyed Mohammad Amin Rasti Alhosseini,Saeed Amir,Mohammad Reza Ghorbanpour Arani 국제구조공학회 2019 Structural Engineering and Mechanics, An Int'l Jou Vol.70 No.6

The present study aims to analyze the magneto-electro-elastic (MEE) vibration of a functionally graded carbon nanotubes reinforced composites (FG-CNTRC) cylindrical shell. Electro-magnetic loads are applied to the structure and it is located on an elastic foundation which is simulated by visco-Pasternak type. The properties of the nano-composite shell are assumed to be varied by temperature changes. The third-order shear deformation shells theory is used to describe the displacement components and Hamilton’s principle is employed to derive the motion differential equations. To obtain the results, Navier’s method is used as an analytical solution for simply supported boundary condition and the effect of different parameters such as temperature variations, orientation angle, volume fraction of CNTs, different types of elastic foundation and other prominent parameters on the natural frequencies of the structure are considered and discussed in details. Design more functional structures subjected to multi-physical fields is of applications of this study results.

Evaluation of the role of TAX, HBZ, and HTLV-1 proviral load on the survival of ATLL patients

Mohammad Mehdi Akbarin,Abbas Shirdel,Alireza Bari,Seyedeh Tahereh Mohaddes,Houshang Rafatpanah,Ehsan Ghayour Karimani,Kobra Etminani,Amin Golabpour,Reza Torshizi 대한혈액학회 2017 Blood Research Vol.51 No.2

Background: Adult T-cell leukemia/lymphoma (ATLL) is an aggressive malignancy with very poor prog-nosis and short survival, caused by the human T-lymphotropic virus type-1 (HTLV-1). The HTLV-1 biomarkers trans-activator x (TAX) and HTLV-1 basic leucine zipper factor (HBZ) are main oncogenes and life-threatening elements. This study aimed to assess the role of the TAX and HBZ genes and HTLV-1 proviral load (PVL) in the survival of patients with ATLL. Methods: Forty-three HTLV-1-infected individuals, including 18 asymptomatic carriers (AC) and 25 ATLL patients (ATLL), were evaluated between 2011 and 2015. The mRNA expression of TAX and HBZ and the HTLV-1 PVL were measured by quantitative PCR. Results: Significant differences in the mean expression levels of TAX and HBZ were observed be-tween the two study groups (ATLL and AC, P=0.014 and P=0.000, respectively). In addi-tion, the ATLL group showed a significantly higher PVL than AC (P=0.000). There was a significant negative relationship between PVL and survival among all study groups (P=0.047). Conclusion: The HTLV-1 PVL and expression of TAX and HBZ were higher in the ATLL group than in the AC group. Moreover, a higher PVL was associated with shorter survival time among all ATLL subjects. Therefore, measurement of PVL, TAX, and HBZ may be beneficial for monitoring and predicting HTLV-1-infection outcomes, and PVL may be useful for prog-nosis assessment of ATLL patients. This research demonstrates the possible correlation between these virological markers and survival in ATLL patients.

Stereological Comparison of the Effects of Pentoxifylline, Captopril, Simvastatin, and Tamoxifen on Kidney and Bladder Structure After Partial Urethral Obstruction in Rats

Mehdi Shirazi,Mohammad-Reza Soltani,Zahra Jahanabadi,Mohammad Amin Abdollahifar,Nader Tanideh,Ali Noorafshan 대한비뇨의학회 2014 Investigative and Clinical Urology Vol.55 No.11

Purpose: Limited studies have shown antifibrotic effects of pentoxifylline, captopril,simvastatin, and tamoxifen. No comparisons are available of the effects of these drugson prevention of renal and bladder changes in partial urethral obstruction (PUO). Materials and Methods: The rats were divided into six groups (n=7). The sham-operatedrats (group I) only underwent laparotomy and did not receive any treatments. The PUOgroups (group II–VI) received normal saline (PUO+NS), pentoxifylline (100 mg/kg/d;PUO+PEN), captopril (35 mg/kg/d; PUO+CAP), simvastatin (15 mg/kg/d; PUO+SIM),or tamoxifen (10 mg/kg/d; PUO+TAM) by gavage for 28 days. Then, the volume and/orlength of the kidney components (tubules, vessels, and fibrous tissue) and the bladdercomponents (epithelial and muscular layers, fibrous tissue, fibroblast and fibrocytenumber) were quantitatively evaluated on the microscopic sections by use of stereologicaltechniques. Results: The volume of renal and bladder fibrosis was significantly ameliorated in thePUO+PEN group, followed by the PUO+CAP, PUO+SIM, and PUO+TAM groups. Also,the volume and length of the renal tubules and vessels and bladder layers were moresignificantly protected in the PUO+PEN group, followed by the PUO+CAP, PUO+SIM,and PUO+TAM groups. Conclusions: Treatment of PUO with PEN was more effective in the prevention of renaland bladder fibrosis and in the preservation of renal and bladder structures.

A Novel Sliding Mode Based UPQC Controller for Power Quality Improvement in Micro-Grids

Heidari Mohammad Amin,Nafar Mehdi,Niknam Taher 대한전기학회 2022 Journal of Electrical Engineering & Technology Vol.17 No.1

This paper presents a novel State Observer Based Sliding Mode controller for UPQC inverters to enhance the power quality in microgrids. In the proposed control scheme, Enhanced extended state observer was applied on a standard sliding mode controller to boost its disturbance rejection capability. The controller was designed to be robust against parameteric and external uncertainties. Further, aff ordable UPQC-grid integration scheme suggested where the photovoltaeek system could be connected to the network via UPQC inverters. Using the suggested confi guration the active and reactive power injection capability was added to UPQC along with its commonly known advantages. Extensive MATLAB Simulink-based theoretical and experimental studies were conducted in diff erent scenarios to verify the effi ciency of the proposed method in improving the power quality indices. Using UPQC with the proposed control scheme shows the better performance than the current traditional UPQC controllers in voltage sag reduction and Harmonics minimization. The main feature of the proposed controller included its accuracy and fast tracking response

MiR-4492, a New Potential MicroRNA for Cancer Diagnosis and Treatment: A Mini Review

Aida Alizamir,Mohammad Amin Amini,Ashkan Karbasi,Mehdi Beyrami 전남대학교 의과학연구소 2024 전남의대학술지 Vol.60 No.1

There is no doubt that the incidence of cancer sufferers is rising in the world, and it is estimated that in the next several decades, the number of people suffering from malignancies or the cancer rate will double. Diagnostic and therapeutic targeting of noncoding RNAs (ncRNAs), especially microRNAs (miRNAs) and long noncoding RNAs (lncRNAs), represent an excellent approach for cancer diagnosis and treatment, as well as many other diseases. One of the latest miRNAs is miR-4492, upregulating some genes in tumor tissues including ROMO1, HLA-G, NKIRAS2, FOXK1, and UBE2C. It represents an attractant example of a miRNA acting at multiple levels to affect the same malignancy hallmark. Based on the studies, miR-4492 plays a key role in several cancers such as, breast cancer, bladder cancer, osteosarcoma, glioblastoma multiforme, hepatocellular carcinoma, colorectal cancer, and ovarian cancer. Putting it all together, identifying the precise mechanisms of miR-4492 in the pathogenesis of cancer, could pave the way to find better diagnostic and therapeutic strategies for cancer sufferers. For this reason, it might be a novel potential diagnostic biomarker and therapeutic target for neoplasms.

The Effect of the Combination of Ginseng, Tribulus Terrestris, and L-arginine on the Sexual Performance of Men with Erectile Dysfunction: a randomized, double-blind, parallel, and placebo-controlled clinical trial

Reza Tahvilian,Mohammad Amin Golesorkhi,Farajollah Parhoudeh,Fatemeh Heydarpour,Hossein Hosseini,Hojjat Baghshahi,Hossein Akbari,Mohammad Reza Memarzadeh,Mehdi Mehran,Hosna Bagheri KOREAN PHARMACOPUNCTURE INSTITUTE 2024 Journal of pharmacopuncture Vol.27 No.2

Objectives: Nitric oxide is the most important mediator of penile erection after the onset of sexual excitement. It activates cyclic guanosine monophosphate (cGMP), increasing penile blood flow. Most pharmaceutical medications prevent enzyme phosphodiesterase type 5 (PDE-5) from breaking down cGMP, thus keeping its level high. However, due to the adverse effects of pharmacological therapies, herbal drugs that improve sexual function have gained attention recently. This study aimed to investigate the combined effects of ginseng, Tribulus terrestris, and L-arginine amino acid on the sexual performance of individuals with erectile dysfunction (ED) using the 5-item version of the International Index of Erectile Function (IIEF-5) questionnaire. Methods: Over three months, 98 men with erectile dysfunction were randomly assigned to receive either 500 mg of herbal supplements or placebo pills. Each herbal tablet contained 100 mg of protodioscin, 35 mg of ginsenosides, and 250 mg of L-arginine. Results: The results showed that the changes in the average scores of ILEF-5 within each group before and after the intervention indicated that all parameters related to the improvement of sexual function in patients with erectile dysfunction improved in the herbal treatment group (p < 0.001). The herbal group significantly improved IIEF-5 scores in nondiabetics (p < 0.05). However, there was no significant difference in the changes of IIEF-5 scores between the two intervention and control groups in diabetic patients. Conclusion: In conclusion, ginseng, Tribulus terrestris, and L-arginine have properties that increase energy and strengthen sexual function, making them suitable for patients with sexual disorders.