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Han S, Lezaack MB, Pyka G, Netto N, Simar A, Wahab MA, Hannard F. On the Competition between Intergranular and Transgranular Failure within 7xxx Al Alloys with Tailored Microstructures. Materials (Basel) 2023; 16:ma16103770. [PMID: 37241397 DOI: 10.3390/ma16103770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 04/25/2023] [Accepted: 05/09/2023] [Indexed: 05/28/2023]
Abstract
7xxx aluminium series reach exceptional strength compared to other industrial aluminium alloys. However, 7xxx aluminium series usually exhibit Precipitate-Free Zones (PFZs) along grain boundaries, which favour intergranular fracture and low ductility. In this study, the competition between intergranular and transgranular fracture is experimentally investigated in the 7075 Al alloy. This is of critical importance since it directly affects the formability and crashworthiness of thin Al sheets. Using Friction Stir Processing (FSP), microstructures with similar hardening precipitates and PFZs, but with very different grain structures and intermetallic (IM) particle size distribution, were generated and studied. Experimental results showed that the effect of microstructure on the failure mode was significantly different for tensile ductility compared to bending formability. While the tensile ductility was significantly improved for the microstructure with equiaxed grains and smaller IM particles (compared to elongated grains and larger particles), the opposite trend was observed in terms of formability.
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Affiliation(s)
- Sutao Han
- Institute of Mechanics, Materials and Civil Engineering, UCLouvain, 1348 Louvain-la-Neuve, Belgium
- Soete Laboratory, Department of Electrical Energy, Metals, Mechanical Constructions and Systems, Faculty of Engineering and Architecture, Ghent University, B-9052 Gent, Belgium
| | - Matthieu B Lezaack
- Institute of Mechanics, Materials and Civil Engineering, UCLouvain, 1348 Louvain-la-Neuve, Belgium
| | - Grzegorz Pyka
- Institute of Mechanics, Materials and Civil Engineering, UCLouvain, 1348 Louvain-la-Neuve, Belgium
| | - Nelson Netto
- Institute of Mechanics, Materials and Civil Engineering, UCLouvain, 1348 Louvain-la-Neuve, Belgium
| | - Aude Simar
- Institute of Mechanics, Materials and Civil Engineering, UCLouvain, 1348 Louvain-la-Neuve, Belgium
| | - Magd Abdel Wahab
- Soete Laboratory, Department of Electrical Energy, Metals, Mechanical Constructions and Systems, Faculty of Engineering and Architecture, Ghent University, B-9052 Gent, Belgium
| | - Florent Hannard
- Institute of Mechanics, Materials and Civil Engineering, UCLouvain, 1348 Louvain-la-Neuve, Belgium
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2
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Tran-Ngoc H, Le-Xuan T, Khatir S, De Roeck G, Bui-Tien T, Abdel Wahab M. A promising approach using Fibonacci sequence-based optimization algorithms and advanced computing. Sci Rep 2023; 13:3405. [PMID: 36854757 PMCID: PMC9974976 DOI: 10.1038/s41598-023-28367-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Accepted: 01/17/2023] [Indexed: 03/03/2023] Open
Abstract
In this paper, the feasibility of Structural Health Monitoring (SHM) employing a novel Fibonacy Sequence (FS)-based Optimization Algorithms (OAs) and up-to-date computing techniques is investigated for a large-scale railway bridge. During recent decades, numerous metaheuristic intelligent OAs have been proposed and immediately gained a lot of momentum. However, the major concern is how to employ OAs to deal with real-world problems, especially the SHM of large-scale structures. In addition to the requirement of high accuracy, a high computational cost is putting up a major barrier to the real application of OAs. Therefore, this article aims at addressing these two aforementioned issues. First, we propose employing the optimal ability of the golden ratio formulated by the well-known FS to remedy the shortcomings and improve the accuracy of OAs, specifically, a recently proposed new algorithm, namely Salp Swarm Algorithm (SSA). On the other hand, to deal with the high computational cost problems of OAs, we propose employing an up-to-date computing technique, termed superscalar processor to conduct a series of iterations in parallel. Moreover, in this work, the vectorization technique is also applied to reduce the size of the data. The obtained results show that the proposed approach is highly potential to apply for SHM of real large-scale structures.
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Affiliation(s)
- H. Tran-Ngoc
- grid.444929.60000 0004 0566 7437Department of Bridge and Tunnel Engineering, Faculty of Civil Engineering, University of Transport and Communications, Hanoi, Vietnam
| | - T. Le-Xuan
- grid.444929.60000 0004 0566 7437Department of Bridge and Tunnel Engineering, Faculty of Civil Engineering, University of Transport and Communications, Hanoi, Vietnam
| | - S. Khatir
- grid.445116.30000 0004 6020 788XFaculty of Civil Engineering, Ho Chi Minh City Open University, Ho Chi Minh City, Vietnam
| | - G. De Roeck
- grid.5596.f0000 0001 0668 7884Department of Civil Engineering, KU Leuven, 3001 Leuven, Belgium
| | - T. Bui-Tien
- grid.444929.60000 0004 0566 7437Department of Bridge and Tunnel Engineering, Faculty of Civil Engineering, University of Transport and Communications, Hanoi, Vietnam
| | - Magd Abdel Wahab
- Soete Laboratory, Department of Electrical Energy, Metals, Mechanical Constructions, and Systems, Faculty of Engineering and Architecture, Ghent University, 9000, Gent, Belgium.
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3
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Sang-To T, Hoang-Le M, Wahab MA, Cuong-Le T. An efficient Planet Optimization Algorithm for solving engineering problems. Sci Rep 2022; 12:8362. [PMID: 35589748 PMCID: PMC9120492 DOI: 10.1038/s41598-022-12030-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Accepted: 05/04/2022] [Indexed: 11/09/2022] Open
Abstract
In this study, a meta-heuristic algorithm, named The Planet Optimization Algorithm (POA), inspired by Newton's gravitational law is proposed. POA simulates the motion of planets in the solar system. The Sun plays the key role in the algorithm as at the heart of search space. Two main phases, local and global search, are adopted for increasing accuracy and expanding searching space simultaneously. A Gauss distribution function is employed as a technique to enhance the accuracy of this algorithm. POA is evaluated using 23 well-known test functions, 38 IEEE CEC benchmark test functions (CEC 2017, CEC 2019) and three real engineering problems. The statistical results of the benchmark functions show that POA can provide very competitive and promising results. Not only does POA require a relatively short computational time for solving problems, but also it shows superior accuracy in terms of exploiting the optimum.
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Affiliation(s)
- Thanh Sang-To
- Laboratory Soete, Department of Electromechanical, Systems and Metal Engineering, Ghent University, Technologiepark Zwijnaarde 903, 9052, Zwijnaarde, Belgium.,Faculty of Civil Engineering, Ho Chi Minh City Open University, Ho Chi Minh City, Vietnam
| | - Minh Hoang-Le
- Laboratory Soete, Department of Electromechanical, Systems and Metal Engineering, Ghent University, Technologiepark Zwijnaarde 903, 9052, Zwijnaarde, Belgium.,Faculty of Civil Engineering, Ho Chi Minh City Open University, Ho Chi Minh City, Vietnam
| | - Magd Abdel Wahab
- Faculty of Mechanical - Electrical and Computer Engineering, School of Engineering and Technology, Van Lang University, Ho Chi Minh City, Vietnam.
| | - Thanh Cuong-Le
- Faculty of Civil Engineering, Ho Chi Minh City Open University, Ho Chi Minh City, Vietnam.
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4
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Aijaz MO, Karim MR, Omar NMA, Othman MHD, Wahab MA, Akhtar Uzzaman M, Alharbi HM, Wazeer I. Recent Progress, Challenges, and Opportunities of Membrane Distillation for Heavy Metals Removal. CHEM REC 2022; 22:e202100323. [PMID: 35258163 DOI: 10.1002/tcr.202100323] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 02/20/2022] [Accepted: 02/22/2022] [Indexed: 11/08/2022]
Abstract
Water is essential for the presence of life on this earth. However, water contamination due to the presence of heavy/toxic metals is one of the serious environmental issues for living beings. Several methods have been devoted to separating or removing those heavy metals from wastewater. Among them, membrane distillation (MD) has become one of the most attractive approaches due to its higher rejection rate than processes driven by pressure, lower energy consumption than traditional distillation processes. MD has gained significant attention for removing heavy metals than other techniques like ion exchange and adsorption in the last two decades. This review provides insight knowledge to the reader and focuses on how heavy metals impact humans and the environment, sources of heavy metals, current and especially removal methods using the MD method. Moreover, recent studies, challenges, and opportunities on MD membrane modules and heavy metal removal systems are discussed. More importantly, in this review, we have identified the gaps and opportunities that are required for enhancing the MD approach and its practical suitability for heavy metal removals. MD module and system showed high performance, proving their possible applications to remove heavy metal ions in water/wastewater treatment.
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Affiliation(s)
- M O Aijaz
- Center of Excellence for Research in Engineering Materials (CEREM), Deanship of Scientific Research (DSR), King Saud University, Riyadh, 11421, Saudi Arabia.,Advanced Membrane Technology Research Centre (AMTEC), School of Chemical and Energy Engineering (SCEE), Faculty of Engineering, Universiti Teknologi Malaysia, 81310 UTM, Skudai, Johor, Malaysia
| | - M R Karim
- Center of Excellence for Research in Engineering Materials (CEREM), Deanship of Scientific Research (DSR), King Saud University, Riyadh, 11421, Saudi Arabia.,K.A.CARE Energy Research and Innovation Center, King Saud University, Riyadh, Saudi Arabia
| | - N M A Omar
- Advanced Membrane Technology Research Centre (AMTEC), School of Chemical and Energy Engineering (SCEE), Faculty of Engineering, Universiti Teknologi Malaysia, 81310 UTM, Skudai, Johor, Malaysia
| | - M H D Othman
- Advanced Membrane Technology Research Centre (AMTEC), School of Chemical and Energy Engineering (SCEE), Faculty of Engineering, Universiti Teknologi Malaysia, 81310 UTM, Skudai, Johor, Malaysia
| | - M A Wahab
- Institute for Advanced Study, Chengdu University, Chengdu, 610106, China.,School of Mechanical, Medical and Process Engineering, Faculty of Engineering, Queensland University of Technology, 2 George St Brisbane, GPO Box 2434, Brisbane, Queensland, Australia, 4001
| | - M Akhtar Uzzaman
- Solar Energy Research Institute (SERI), Universiti Kebangsaan Malaysia, UKM, Bangi, 43600, Selangor, Malaysia
| | - H M Alharbi
- Center of Excellence for Research in Engineering Materials (CEREM), Deanship of Scientific Research (DSR), King Saud University, Riyadh, 11421, Saudi Arabia.,Mechanical Engineering Department, College of Engineering, King Saud University, Riyadh, 11421, Saudi Arabia
| | - I Wazeer
- Chemical Engineering Department, King Saud University, P.O. Box: 800, Riyadh, 11421, Saudi Arabia.,Chemical Engineering Department, University of Malaya, Kuala Lumpur, Malaysia
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Bhuiyan AS, Bari MA, Aditya G, Chowdhury UW, Wahab MA, Rahman MM, Islam MS, Rahman MM, Sharker MA, Rahman MS, Hossain M. Prevalence and Pattern of Dyslipidemia in Diabetes Mellitus Patients Admitted in the Department of Cardiology, Mymensingh Medical College Hospital, Mymensingh, Bangladesh. Mymensingh Med J 2021; 30:21-27. [PMID: 33397846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Patients with Diabetes Mellitus are at high risk of cardiovascular events because of abnormal lipid metabolism. Dyslipidemia is common in patients with Diabetes Mellitus (DM). However; in Bangladesh this issue is not yet properly addressed. The aim of this study is to determine the prevalence and patterns of dyslipidaemia in patients with DM in a divisional city Mymensingh. This cross-sectional study was conducted in randomly selected eligible patients from the indoor registry of the Department of Cardiology, Mymensingh Medical College Hospital (MMCH), Bangladesh from April 2012 to March 2013. A well structured questionnaire and blood investigation for lipid profile and blood sugar were the tools of data collection from 120 randomly selected DM patients registered in the department of cardiology, MMCH. Out of 120 enrolled participants the prevalence of dyslipidemia in DM patients was 86.0%, prevalence of dyslipidemia in males was 88.0% while in females was 85.0% but the difference was not significant (p=0.42). Regarding age group, BMI and duration of DM, there is no significant association exists with dyslipidemia. About half of the studied DM patients have high serum total cholesterol level (50.83%), while 22.5% had low serum HDL-C levels and 35.0% had high serum LDC-C level, most of patients had serum triglyceride levels above normal range (67.5%) and so the common patterns of dyslipidemia in this study were serum triglyceride level followed by total cholesterol. High prevalence of dyslipidemia among diabetes mellitus in Mymensingh city were observed and so the common patterns of dyslipidemia is triglyceride followed by total cholesterol. This study emphasizes the importance of screening of lipid profile as these abnormalities may lead to development of cardiovascular diseases.
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Affiliation(s)
- A S Bhuiyan
- Dr Mohammad Abdus Sattar Bhuiyan, Assistant Professor, Department of Cardiology, Mymensingh Medical College (MMC), Mymensingh, Bangladesh; E-mail:
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Wahab MA, Kamal SB, Shahin MR, Siddique RU, Hassan MR, Hassan BS, Kumar SB, Haque AR, Nandi AK, Das PK. Efficacy of Itraconazole in the Prevention of Recurrence of Tinea Versicolor: A Three Year Follow Up. Mymensingh Med J 2020; 29:351-356. [PMID: 32506089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Pityriasis versicolor (PV) also known as tinea versicolor, which is chronic and superficial fungal skin disease caused by Malassezia yeasts. A permanent cure may difficult to achieve and this may explain the long-term nature of the disease. Consequently, a preventive treatment regimen may help to prevent the recurrence of pityriasis versicolor. Whether, the recurrence of tinea versicolor could be prevented by monthly itraconazole treatment regimen after a short course of itraconazole therapy. Open treatment followed by a randomized, single blind placebo control trial. Multi-center trial was characterized by an open, active treatment phase with itraconazole followed by a randomized placebo controlled treatment for prevention of recurrence. A total 200 patients (150 male and 50 female) were included in this study and was given 200mg itraconazole daily for 7 days (treatment phase). Patients in whom tinea versicolor was mycologically cured divided into Group A and Group B. Active open treatment was followed by preventive itraconazole treatment 200mg twice daily in Group A and placebo in Group B monthly for 6 consecutive months. The patients were diagnosed clinically and confirmed by Wood's lamp examination and KOH microscopy. Clinical improvement in 90%, negative Wood's lamp examination in 86.5% and Mycological cure in 85.5% were found at the end of open treatment. The mycological cure, 171 subjects were taken into this study for preventive treatment phase and divided into two groups- Group A & Group B. Preventive treatment was given in Group A and placebo in Group B. After the preventive treatment, the end point (After 6 months), clinical improvement, negative Wood's lamp examination and mycological cure were found in 81(90%), 76(84.4%) and 75(83.3%) in Group A and 44(55%), 41(51.3%) and 42(52.5%) in Group B respectively. In preventive treatment phase, 1 patient in Group A did not complete the study. No patient experienced any serious adverse effects. Prevention of recurrence of Pityriasis versicolor with itraconazole is as effective as treatment.
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Affiliation(s)
- M A Wahab
- Professor Lt Col Md Abdul Wahab, Professor, Department of Dermatology and Venereology, Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka, Bangladesh; E-mail:
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7
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Islam MS, Islam MN, Kundu SK, Islam MZ, Bhuiyan AS, Haque MM, Malek MS, Paul PK, Shaha B, Thakur AK, Wahab MA, Chowdhury UW, Bhowmick K. Serum Albumin Level and In-Hospital Outcome of Patients with First Attack Acute Myocardial Infarction. Mymensingh Med J 2019; 28:744-751. [PMID: 31599236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Acute myocardial infarction (AMI) patients constitute a large proportion of admissions in coronary care unit and their management and risk stratification is of immense importance. A decrease in serum albumin concentration might be associated with an increased risk in the incident of both cardiovascular diseases and worse hospital outcome. We assessed whether serum albumin levels at admission was associated with in-hospital adverse outcome in patients with first attack of acute myocardial infarction (AMI). The aim of the study was to evaluate association of serum albumin level with in-hospital outcome in patients with first attack of acute myocardial infarction. This cross-sectional analytical study was conducted in the department of cardiology in Mymensingh Medical College Hospital, Mymensingh, Bangladesh from March 2017 to February 2018. Total 374 patients of first attack of acute myocardial infarction included considering inclusion and exclusion criteria. The sample population was divided into two groups: Group I (Patients with acute myocardial infarction with serum albumin <3.5gm/dl) and. Group II (Patients with acute myocardial infarction with serum albumin ≥3.5gm/dl). Serum albumin level was measured within 24 hours of admission and the incidence of in-hospital major cardiac outcomes was observed. In this study mean±SD serum albumin level of Group I, Group II were 3.02±0.12gm/dl, 4.48±0.50gm/dl respectively. In Group I patient, 52(59.80%), 7(8.00%), 10(11.50%), developed heart failure, cardiogenic shock, arrhythmias respectively and 8(9.20%) died and in Group II patient 20(7.90%), 7(2.80%), 8(3.20%) developed heart failure, cardiogenic shock, arrhythmias respectively and 4(1.60%) died out of them and all of these outcome were statistically significant. Mean±SD duration of hospital stay of the study population according serum albumin level, in Group I, 5.76±1.83 days, in Group II, 4.40±1.22 days which was statistically significant (p<0.05). In conclusion, patient with first attack of acute myocardial infarction serum albumin level below 3.50gm/dl increased the risk of worse in-hospital outcome.
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Affiliation(s)
- M S Islam
- Dr Md Saiful Islam, MD Cardiology, Thesis Part Student, Mymensingh Medical College (MMC), Mymensingh, Bangladesh
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Wahab MA, Shehta A, Elshoubary M, Yassen AM, Elmorshedi M, Salah T, Sultan AM, Fathy O, Elsarraf WR, Shiha U, Zalata K, Elghawalby AN, Eldesoky M, Monier A, Said R, Elsabagh AM, Ali M, Kandeel A, Abdalla U, Aboelella M, Elsadany M, Abdel-Khalek EE, Marwan A, ElMorsi FM, Adly R. Living-Donor Liver Transplantation in Hepatitis C Virus Era: A Report of 500 Consecutive Cases in a Single Center. Transplant Proc 2018; 50:1396-1406. [PMID: 29880362 DOI: 10.1016/j.transproceed.2018.02.085] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2017] [Revised: 01/28/2018] [Accepted: 02/17/2018] [Indexed: 12/11/2022]
Abstract
BACKGROUND Living donor liver transplantation (LDLT) is considered a safe alternative to deceased donor liver transplantation (DDLT). In Egypt, DDLT program is still awaited, making LDLT the only hope for patients with end-stage liver disease, mainly due to chronic hepatitis C virus (HCV) infection. The current study is conducted to evaluate our experience of LDLT and discuss the lessons learned from 500 consecutive cases in HCV area. METHODS We reviewed the data of patients who underwent LDLT at Gastrointestinal Surgery Center, Mansoura University during the period between May 2004 and March 2017. RESULTS During the study period, 500 cases underwent LDLT at our unit. The median age was 51 years, and most of our cases were males (446, 89.2%) and had HCV infection (453, 90.6%). The median MELD score was 15. Median ICU stay was 5 days, and hospital stay was 22 days. Postoperative morbidities occurred in 220 cases (44%). Early mortality occurred in 69 patients (13.8%), and late mortality occurred in 45 patients (9%). The 1-, 3-, 5-, and 7-year overall survival rates of all cases were 80.9%, 78.2%, 75.7%, and 75%, respectively. Preoperative creatinine, worm ischemia, blood transfusion, ICU stay, postoperative morbidities, and small for size syndrome were independent predictors for overall survival. CONCLUSIONS In countries lacking DDLT, LDLT is the only effective alternative. LDLT requires a teamwork to achieve successful outcomes. LDLT should only be performed in centers with the adequate experience to avoid and decrease the hazards related to this procedure.
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Affiliation(s)
- M A Wahab
- Department of Surgery, Gastrointestinal Surgery Center, College of Medicine, Mansoura University, Mansoura, Egypt
| | - A Shehta
- Department of Surgery, Gastrointestinal Surgery Center, College of Medicine, Mansoura University, Mansoura, Egypt.
| | - M Elshoubary
- Department of Surgery, Gastrointestinal Surgery Center, College of Medicine, Mansoura University, Mansoura, Egypt
| | - A M Yassen
- Department of Anesthesia and Intensive Care, Gastrointestinal Surgery Center, College of Medicine, Mansoura University, Mansoura, Egypt
| | - M Elmorshedi
- Department of Anesthesia and Intensive Care, Gastrointestinal Surgery Center, College of Medicine, Mansoura University, Mansoura, Egypt
| | - T Salah
- Department of Surgery, Gastrointestinal Surgery Center, College of Medicine, Mansoura University, Mansoura, Egypt
| | - A M Sultan
- Department of Surgery, Gastrointestinal Surgery Center, College of Medicine, Mansoura University, Mansoura, Egypt
| | - O Fathy
- Department of Surgery, Gastrointestinal Surgery Center, College of Medicine, Mansoura University, Mansoura, Egypt
| | - W R Elsarraf
- Department of Anesthesia and Intensive Care, Gastrointestinal Surgery Center, College of Medicine, Mansoura University, Mansoura, Egypt
| | - U Shiha
- Diagnostic and Interventional Radiology Department, Gastrointestinal Surgery Center, College of Medicine, Mansoura University, Mansoura, Egypt
| | - K Zalata
- Department of Pathology, Gastrointestinal Surgery Center, College of Medicine, Mansoura University, Mansoura, Egypt
| | - A N Elghawalby
- Department of Surgery, Gastrointestinal Surgery Center, College of Medicine, Mansoura University, Mansoura, Egypt
| | - M Eldesoky
- Department of Surgery, Gastrointestinal Surgery Center, College of Medicine, Mansoura University, Mansoura, Egypt
| | - A Monier
- Department of Surgery, Gastrointestinal Surgery Center, College of Medicine, Mansoura University, Mansoura, Egypt
| | - R Said
- Department of Surgery, Gastrointestinal Surgery Center, College of Medicine, Mansoura University, Mansoura, Egypt
| | - A M Elsabagh
- Department of Surgery, Gastrointestinal Surgery Center, College of Medicine, Mansoura University, Mansoura, Egypt
| | - M Ali
- Department of Surgery, Gastrointestinal Surgery Center, College of Medicine, Mansoura University, Mansoura, Egypt
| | - A Kandeel
- Department of Anesthesia and Intensive Care, Gastrointestinal Surgery Center, College of Medicine, Mansoura University, Mansoura, Egypt
| | - U Abdalla
- Department of Anesthesia and Intensive Care, Gastrointestinal Surgery Center, College of Medicine, Mansoura University, Mansoura, Egypt
| | - M Aboelella
- Department of Anesthesia and Intensive Care, Gastrointestinal Surgery Center, College of Medicine, Mansoura University, Mansoura, Egypt
| | - M Elsadany
- Department of Hepatology, Gastrointestinal Surgery Center, College of Medicine, Mansoura University, Mansoura, Egypt
| | - E E Abdel-Khalek
- Department of Hepatology, Gastrointestinal Surgery Center, College of Medicine, Mansoura University, Mansoura, Egypt
| | - A Marwan
- Department of Hepatology, Gastrointestinal Surgery Center, College of Medicine, Mansoura University, Mansoura, Egypt
| | - F M ElMorsi
- Department of Hepatology, Gastrointestinal Surgery Center, College of Medicine, Mansoura University, Mansoura, Egypt
| | - R Adly
- Department of Hepatology, Gastrointestinal Surgery Center, College of Medicine, Mansoura University, Mansoura, Egypt
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9
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Alali H, Braeckman L, Van Hecke T, De Clercq B, Janssens H, Wahab MA. Relationship between non-standard work arrangements and work-related accident absence in Belgium. J Occup Health 2017; 59:177-186. [PMID: 28111414 PMCID: PMC5478515 DOI: 10.1539/joh.16-0119-oa] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Objectives: The main objective of this study is to examine the relationship between indicators of non-standard work arrangements, including precarious contract, long working hours, multiple jobs, shift work, and work-related accident absence, using a representative Belgian sample and considering several socio-demographic and work characteristics. Methods: This study was based on the data of the fifth European Working Conditions Survey (EWCS). For the analysis, the sample was restricted to 3343 respondents from Belgium who were all employed workers. The associations between non-standard work arrangements and work-related accident absence were studied with multivariate logistic regression modeling techniques while adjusting for several confounders. Results: During the last 12 months, about 11.7% of workers were absent from work because of work-related accident. A multivariate regression model showed an increased injury risk for those performing shift work (OR 1.546, 95% CI 1.074-2.224). The relationship between contract type and occupational injuries was not significant (OR 1.163, 95% CI 0.739-1.831). Furthermore, no statistically significant differences were observed for those performing long working hours (OR 1.217, 95% CI 0.638-2.321) and those performing multiple jobs (OR 1.361, 95% CI 0.827-2.240) in relation to work-related accident absence. Those who rated their health as bad, low educated workers, workers from the construction sector, and those exposed to biomechanical exposure (BM) were more frequent victims of work-related accident absence. No significant gender difference was observed. Conclusion: Indicators of non-standard work arrangements under this study, except shift work, were not significantly associated with work-related accident absence. To reduce the burden of occupational injuries, not only risk reduction strategies and interventions are needed but also policy efforts are to be undertaken to limit shift work. In general, preventive measures and more training on the job are needed to ensure the safety and well-being of all workers.
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Affiliation(s)
- Hanan Alali
- Department of Electrical Energy, Systems and Automation, Faculty of Engineering and Architecture, Ghent University
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10
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Yue T, Abdel Wahab M. A Numerical Study on the Effect of Debris Layer on Fretting Wear. Materials (Basel) 2016; 9:ma9070597. [PMID: 28773719 PMCID: PMC5456884 DOI: 10.3390/ma9070597] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Revised: 06/25/2016] [Accepted: 07/14/2016] [Indexed: 11/22/2022]
Abstract
Fretting wear is the material damage of two contact surfaces caused by micro relative displacement. Its characteristic is that debris is trapped on the contact surfaces. Depending on the material properties, the shapes of the debris, and the dominant wear mechanisms, debris can play different roles that either protect or harm interfaces. Due to the micro scale of the debris, it is difficult to obtain instantaneous information and investigate debris behavior in experiments. The Finite Element Method (FEM) has been used to model the process of fretting wear and calculate contact variables, such as contact stress and relative slip during the fretting wear process. In this research, a 2D fretting wear model with a debris layer was developed to investigate the influence of debris on fretting wear. Effects of different factors such as thickness of the debris layer, Young’s modulus of the debris layer, and the time of importing the layer into the FE model were considered in this study. Based on FE results, here we report that: (a) the effect of Young’s modulus of the debris layer on the contact pressure is not significant; (b) the contact pressure between the debris layer and the flat specimen decreases with increasing thickness of the layer and (c) by importing the debris layer in different fretting wear cycles, the debris layer shows different roles in the wear process. At the beginning of the wear cycle, the debris layer protects the contact surfaces of the first bodies (cylindrical pad and flat specimen). However, in the final cycle, the wear volumes of the debris layers exhibit slightly higher damage compared to the model without the debris layer in all considered cases.
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Affiliation(s)
- Tongyan Yue
- Department of Electrical Energy, Systems and Automation, Faculty of Engineering and Architecture, Ghent University, Zwijnaarde B-9052, Belgium.
| | - Magd Abdel Wahab
- Division of Computational Mechanics, Ton Duc Thang University, Ho Chi Minh City, Vietnam.
- Faculty of Civil Engineering, Ton Duc Thang University, Ho Chi Minh City, Vietnam.
- Soete Laboratory, Faculty of Engineering and Architecture, Ghent University, Technologiepark Zwijnaarde 903, Zwijnaarde B-9052, Belgium.
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Alali H, Abdel Wahab M, Van Hecke T, Braeckman L. Work accident victims: a comparison between non-standard and standard workers in Belgium. Int J Occup Environ Health 2016; 22:99-106. [PMID: 27092408 DOI: 10.1080/10773525.2016.1168588] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
BACKGROUND The fast growth of non-standard employment in developed countries highlights the importance of studying the influence of contract type on worker's safety and health. OBJECTIVE The main purpose of our study is to investigate whether non-standard workers are more injured than standard workers or not. Additionally, other risk factors for occupational accidents are investigated. METHODS Data from the Belgian surveys on work ability in 2009 and 2011 are used. During their annual occupational health examination, workers were asked to fill in a self-administered questionnaire. In total, 1886 complete responses are collected and analyzed using logistic regression. RESULTS Temporary workers did not have higher injury rates than permanent workers [OR 0.5, 95% confidence interval 0.2-1.2]. Low-educated, less-experienced workers and those exposed to dangerous conditions are more frequent victims of occupational accidents. CONCLUSION The present data do not support the hypothesis that non-standard workers have more injuries than standard workers. Our results about occupational accidents derived from a non-representative sample of the Belgian workforce and cannot be generalized due to the heterogeneity in job organization and labor regulations between countries. Further research is needed to extend our findings and to seek other factors that may be associated with work accidents.
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Affiliation(s)
- Hanan Alali
- a Faculty of Engineering and Architecture , Ghent University , Gent , Belgium
| | - Magd Abdel Wahab
- a Faculty of Engineering and Architecture , Ghent University , Gent , Belgium
| | - Tanja Van Hecke
- b Department of Industrial Technology and Construction , Ghent University , Ghent , Belgium
| | - Lutgart Braeckman
- c Department of Public Health, Faculty of Medicine and Health Sciences , Ghent University , Gent , Belgium
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Alali H, Wahab MA, Van Hecke T, De Clercq B, Janssens H, Braeckman L. Relationships between irregular work arrangements and occupational injuries in EU 27. Findings from the fifth European working condition survey. Arch Public Health 2015. [PMCID: PMC4582352 DOI: 10.1186/2049-3258-73-s1-p20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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13
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Wang C, Sun Q, Wahab MA, Zhang X, Xu L. Regression modeling and prediction of road sweeping brush load characteristics from finite element analysis and experimental results. Waste Manag 2015; 43:19-27. [PMID: 26123978 DOI: 10.1016/j.wasman.2015.06.027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Revised: 04/25/2015] [Accepted: 06/18/2015] [Indexed: 06/04/2023]
Abstract
Rotary cup brushes mounted on each side of a road sweeper undertake heavy debris removal tasks but the characteristics have not been well known until recently. A Finite Element (FE) model that can analyze brush deformation and predict brush characteristics have been developed to investigate the sweeping efficiency and to assist the controller design. However, the FE model requires large amount of CPU time to simulate each brush design and operating scenario, which may affect its applications in a real-time system. This study develops a mathematical regression model to summarize the FE modeled results. The complex brush load characteristic curves were statistically analyzed to quantify the effects of cross-section, length, mounting angle, displacement and rotational speed etc. The data were then fitted by a multiple variable regression model using the maximum likelihood method. The fitted results showed good agreement with the FE analysis results and experimental results, suggesting that the mathematical regression model may be directly used in a real-time system to predict characteristics of different brushes under varying operating conditions. The methodology may also be used in the design and optimization of rotary brush tools.
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Affiliation(s)
- Chong Wang
- School of Mechanical and Automotive Engineering, Liaocheng University, China.
| | - Qun Sun
- School of Mechanical and Automotive Engineering, Liaocheng University, China
| | - Magd Abdel Wahab
- Department of Mechanical Construction and Production, Ghent University, Belgium
| | - Xingyu Zhang
- School of Mechanical & Electrical Engineering, Beijing Information & Science Technology University, China
| | - Limin Xu
- School of International Education, Liaocheng University, China
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Hasmuddin M, Singh P, Shkir M, Abdullah MM, Vijayan N, Bhagavannarayana G, Wahab MA. Structural, spectroscopic, optical, dielectric and mechanical study of pure and l-Proline doped ammonium dihydrogen phosphate single crystals. Spectrochim Acta A Mol Biomol Spectrosc 2014; 123:376-384. [PMID: 24412791 DOI: 10.1016/j.saa.2013.12.038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Revised: 11/30/2013] [Accepted: 12/04/2013] [Indexed: 06/03/2023]
Abstract
Single crystals of pure and l-Proline (LP) C5H9NO2 doped ammonium dihydrogen phosphate (ADP) (NH4) H2PO4 were grown by slow evaporation solution technique (SEST) at ambient conditions. Powder X-ray diffraction (PXRD) analysis was carried out to confirm the crystal structure and no additional phase was observed due to doping except a systematic variation in peak intensities. FT-Raman analysis also confirms that there is no additional phase formation due to doping. Fourier transform infrared spectral analysis was done to examine the presence of various functional groups in the grown crystals. UV-VIS-NIR spectroscopic analysis was carried out to see the change in optical transparency of pure ADP and crystals due to LP with different doping concentrations. The high-resolution X-ray diffraction (HRXRD) analysis was carried out to examine the crystalline perfection and observed reasonable changes with LP doping. Second harmonic generation (SHG) efficiency measurement was done to examine the enhancement in the nonlinear optical characteristics of the grown crystals. The dielectric behavior of the samples shows that the dielectric constant decreased with increase the value of frequency. The effect of LP dopant on crystal morphology, mechanical properties of ADP has also been presented in this paper. The above studies reveal the effect of incorporation of LP into the lattice of ADP crystals.
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Affiliation(s)
- Mohd Hasmuddin
- Crystal Growth Laboratory, Dept. of Physics, Jamia Millia Islamia, New Delhi 110 025, India
| | - Preeti Singh
- Crystal Growth Laboratory, Dept. of Physics, Jamia Millia Islamia, New Delhi 110 025, India
| | - Mohd Shkir
- Crystal Growth Laboratory, Dept. of Physics, Jamia Millia Islamia, New Delhi 110 025, India; Department of Physics, School of Science, King Khalid University, P.O. Box. 9004, Abha 61413, Saudi Arabia
| | - M M Abdullah
- Crystal Growth Laboratory, Dept. of Physics, Jamia Millia Islamia, New Delhi 110 025, India; Promising Centre for Sensors and Electronic Devices (PCSED), Department of Physics, College of Science and Arts, Najran University, P.O. Box 1988, Najran 11001, Saudi Arabia
| | - N Vijayan
- CSIR-National Physical Laboratory, Dr. K.S. Krishnan Road, New Delhi 110 012, India
| | - G Bhagavannarayana
- CSIR-National Physical Laboratory, Dr. K.S. Krishnan Road, New Delhi 110 012, India
| | - M A Wahab
- Crystal Growth Laboratory, Dept. of Physics, Jamia Millia Islamia, New Delhi 110 025, India.
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Murshed H, Islam M, Wahab MA, Al-Azad MAS. Effect of Preoperative Bolus Supplemental Fluid on Postoperative Nausea and Vomiting - A Prospective Study. ACTA ACUST UNITED AC 2013. [DOI: 10.3329/jafmc.v8i2.16342] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
DOI: http://dx.doi.org/10.3329/jafmc.v8i2.16342 JAFMC Vol.8(2) 2012 pp.16-21
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Rani N, Vijayan N, Thukral K, Maurya KK, Haranath D, Bhagavannarayana G, Verma S, Wahab MA. Crystalline perfection, optical and third harmonic generation analyses of non-linear optical single crystal of L-lysine acetate. Spectrochim Acta A Mol Biomol Spectrosc 2013; 105:192-199. [PMID: 23305871 DOI: 10.1016/j.saa.2012.12.030] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2012] [Revised: 12/07/2012] [Accepted: 12/10/2012] [Indexed: 06/01/2023]
Abstract
The potential organic non-linear optical single crystal of L-lysine acetate has been grown by slow evaporation solution growth technique (SEST) at room temperature. It crystallizes in the monoclinic system with space group of P2(1). The crystalline perfection of the grown single crystal has been examined by high resolution X-ray diffraction analysis (HRXRD). The functional groups of the synthesized compound have been identified by (13)C NMR, (1)H NMR and FTIR analyses. The optical absorption studies show that the crystal is transparent in the entire visible region with a cut-off wavelength of 236 nm. The optical band gap is found to be 5.29 eV. The steady-state PL spectra was recorded for pure L-lysine acetate crystal at room temperature. The third harmonic generation efficiency of the crystal has been evaluated by Z-scan technique and its non-linear optical coefficient has been calculated. Birefringence measurement has been carried out in order to see the optical homogeneity of the grown specimen. Its electrical properties has been assessed by dielectric measurement at different temperatures. The calculated optical band gap is 5.29 eV. Its thermal parameters like thermal diffusivity (α), thermal effusivity (e), thermal conductivity (k) and heat capacity (C(p)) have been determined by photopyroelectric technique. Vickers micro hardness studies were carried out using a Vickers hardness tester equipped with a diamond square indenter. The piezoelectric measurement for L-lysine acetate has been also been carried at ambient condition.
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Affiliation(s)
- Neelam Rani
- CSIR-National Physical Laboratory, New Delhi 110 012, India
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Shkir M, Ganesh V, Vijayan N, Riscob B, Kumar A, Rana DK, Shoeb Khan M, Hasmuddin M, Wahab MA, Ramesh Babu R, Bhagavannarayana G. Analysis on structural, SHG efficiency, optical and mechanical properties of KDP single crystals influenced by Glycine doping. Spectrochim Acta A Mol Biomol Spectrosc 2013; 103:199-204. [PMID: 23261614 DOI: 10.1016/j.saa.2012.10.061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2012] [Revised: 10/15/2012] [Accepted: 10/25/2012] [Indexed: 06/01/2023]
Abstract
Good quality single crystals of potassium dihydrogen orthophosphate (KDP) were grown with different doping concentration of Glycine by conventional solution technique in aqueous solution. X-ray diffraction study has been carried out in order to see the effect of dopant on the structural parameters of KDP. There is no additional phase was observed which was further confirmed by Raman spectroscopic analysis. The second harmonic generation efficiency was measured by using Kurtz powder technique. The relative second harmonic generation (SHG) efficiency of the grown crystals was found to be increased with doping concentration up to 2.5 mol%. Optical transmission study also revealed the same behaviour with enhancement up to 2.5 mol% concentration and later decreased but still higher than pure KDP. The mechanical strength was found to increase with increasing the doping concentration.
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Affiliation(s)
- Mohd Shkir
- Department of Physics, Atma Ram Sanatan Dharma College, University of Delhi, New Delhi 110 021, India.
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Rani N, Vijayan N, Maurya KK, Haranath D, Saini P, Rathi B, Wahab MA, Bhagavanarayana G. Studies on the effect of polymer coating on solution grown hygroscopic non-linear optical single crystal of L-lysine monohydrochloride. Spectrochim Acta A Mol Biomol Spectrosc 2012; 97:871-875. [PMID: 22902930 DOI: 10.1016/j.saa.2012.07.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2011] [Revised: 06/29/2012] [Accepted: 07/10/2012] [Indexed: 06/01/2023]
Abstract
Nonlinear optical single crystals are getting attention because of its enormous applications in the area of fiber optic communication and optical signal processing. In this article, we are reporting the single crystal growth of l-lysine monohydrochloride by slow evaporation solution growth technique, by using double distilled water as the solvent. We found that the grown single crystal is bulk in size and fairly transparent. But after a period of time, due to its hygroscopic nature, the transparency is completely vanished and became opaque. Then we have attempted to coat the poly methyl methacrylate (PMMA) polymer on the surface of l-lysine monohydrochloride (l-LMHCL) single crystal by dip coating method. This polymer coating is giving resistance to hygroscopic nature and also acting as thin protective covering layer without affecting the other properties. Then we have systematically studied the different properties of bare, polymer coated and hygroscopic l-LMCHL single crystals. Its crystalline perfection was examined by high resolution X-ray diffractometer and found major differences in crystalline quality. Its structural and optical behavior was assessed by powder X-ray diffraction, UV-vis and luminescence analyses.
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Affiliation(s)
- Neelam Rani
- CSIR-National Physical Laboratory, New Delhi 110012, India
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Chowdhury WK, Wahab MA, Khondker L, Khan MSI, Shirajul IK. Efficacy and Safety of Hydroquinone, Kojic Acid and Glycolic Acid Combination in the Treatment of Melasma. Bangladesh J Med Sci 2012. [DOI: 10.3329/bjms.v11i3.11720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Background & Methodology: It was an opened clinical trial. The study was carried out from March 2009 to February 2011, in the outpatient department of Dermatology and Venereology, Bangabandhu Sheikh Mujib Medical University (BSMMU) Dhaka, Bangladesh to evaluate the efficacy and side effects of the combination therapy of hydroquinone(HQ), kojic acid(KA) and glycolic acid(GA) for the treatment of melasma. Patients suffering from melasma were selected as study population. Within the period of data collection, thirty patients of melasma were assigned purposively. The efficacy was evaluated using Melasma Area and Severity Index (MASI) Score. The severity of melasma of each of the four regions (forehead, right malar region, left malar region and chin) are assessed based on three variables, percentage of the total area involved (A), darkness (D) and homogenicity (H).Results:The study showed that majority (30%) of the cases were between 20 to 25 years, majority (77%) of patients were female, (50%) patients were housewives, (50%) were in graduation level of education, (50%) of patients was found as upper class and negative family history was present in majority (80%) of cases. It was seen that highest (93%) number of patients were malar type and 7% were centro-facial type. The study showed the change in MASI Score after treatment with combination therapy (GA 2%, HQ 2% and KA 1%). After 12 weeks of treatment, the average MASI score was decreased by 24.20% indicating mild reduction of the severity of melasma and 18%, 18%, 9% and 55% patients developed side -effects like itching, burning sensation, scaling, and erythema respectively. Conclusion: Combination therapy (GA 2%, HQ 2% and KA 1%) has a few lightening effect on melasma, with no remarkable side effects. Further study should be conducted with large number of sample and longer follow up. DOI: http://dx.doi.org/10.3329/bjms.v11i3.11720 Bangladesh Journal of Medical Science Vol. 11 No. 03 July12
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Abstract
Background: Seborrheic dermatitis is a common papulosquamous dermatosis and occurring in 2% to 5% of the population. The prevalence of seborrheic dermatitis among HIV-positive and AIDS patients between 34% and 83%. The anti-inflammatory activity of oral itraconazole and efficacy on Malessezia suggests that itraconazole capsule will be the first oral treatment option in future in seborrheic dermatitis. Unfortunately there is no data base study with the efficacy of oral itraconazole for the treatment of seborrheic dermatitis over Bangladeshi people.Objectives: To evaluate the efficacy of itraconazole in the treatment of Seborrheic dermatitis.Methods: This was an interventional type of study and total thirty seven patients of seborrheic dermatitis from department of Dermatology and Venereology, Bangabandhu Sheikh Mujib Medical University (BSMMU) was enrolled. The study was carried out for a period of two years from January 2008 to December 2009 and purposive type non-probability sampling technique was followed in this study.Results: The scoring of seborrhea was 6.33±1.15 before treatment and 4.33 ±3.21 after treatment, scoring of itching was 6.66 ±1.49 before treatment and 3.61 ±2.70 after treatment and scoring of greasy crust was 7.12 ±2.70 before treatment and 4.00 ±3.16 after treatment. It was observed that before treatment, erythema was severe in 43.2% cases, moderate in 51.4% cases and mild type erythema was present in 5.4% cases. And after treatment, 29.7% had severe type erythema, no patient had moderate type erythema, only 43.2% had mild type and 27% cases had no erythema at all. Before treatment, papular eruption was severe in 27% cases, moderate in 54.1% cases and only 18.9% had mild type papular eruption. But after treatment, 10.8% had severe type, 18.9% had moderate, 51.4% had mild and 18.9% had no papular eruption at all. It was observed that before treatment, squamation was severe in 37.8% cases and moderate in 62.2% cases. But after treatment, 18.9% had severe type squamation, 10.8% had moderate, 45.9% had mild and 24.3% had no squamation. Improvement was shown in 26(70.27%) cases and 11(29.73%) cases shown no improvement at all.Conclusion: The study suggests that oral itraconazole has significant efficacy profile for treatment option of seborrheic dermatitis. DOI: http://dx.doi.org/10.3329/jbcps.v29i4.11326 J Bangladesh Coll Phys Surg 2011; 29: 201-206
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Vijayan N, Rani N, Bhagavannarayana G, Haranath D, Jayabharathi J, Wahab MA, Das S. Optical, elemental and structural analyses of acetoacetanilide single crystals for nonlinear optical applications. Spectrochim Acta A Mol Biomol Spectrosc 2012; 93:75-80. [PMID: 22465771 DOI: 10.1016/j.saa.2012.02.077] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2011] [Accepted: 02/22/2012] [Indexed: 05/31/2023]
Abstract
Single crystals of acetoacetanilide have been successfully grown by slow evaporation solution growth method at room temperature. The grown crystal belongs to orthorhombic crystal system having the lattice dimensions of a=8.686Å, b=11.104Å, c=19.232Å. Its crystalline perfection was examined by home-made high resolution X-ray diffractometer (HRXRD), and found that that the quality of the specimen is reasonable. The presence of carbon, hydrogen and nitrogen were experimentally determined by elemental analysis and that are in good agreement with the theoretically calculated values. Its laser damage threshold, phase matching and second harmonic generation efficiency were determined by using Nd:YAG laser as a source. Optical behavior of acetoacetanilide was examined by using photoluminescence studies. Its hyerpolarizability and HOMO-LUMO energies were calculated by using density functional theory (DFT).
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Affiliation(s)
- N Vijayan
- CSIR-National Physical Laboratory, New Delhi 110 012, India.
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Khondker L, Wahab MA, Khan SI. Efficacy of topical application of Pimecrolimus cream in the treatment of discoid lupus erythematosus. Mymensingh Med J 2012; 21:259-264. [PMID: 22561768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The interventional type of study to assess the efficacy of Pimecrolimus cream in the treatment of patient of localized discoid lupus erythematosus (DLE) was carried out for a period of July 2008 to June 2009. It was observed that before treatment, erythema was severe in 43.2% cases, moderate in 51.4% cases and mild type erythema was present in 5.4% cases. The post- treatment revealed, 29.7% severe type erythema, none evidenced moderate type erythema, only 43.2% had mild type and 27% cases no erythema at all. Before treatment, infiltration was severe in 27% cases, moderate in 54.1% cases and only 18.9% had mild type infiltration. But after treatment, 10.8% had severe type infiltration, 18.9% had moderate, 51.4% had mild and 18.9% had no infiltration at all. Similar response to treatment was noticed with squamation which exhibited a drop from 37.8% to 18.9% in severe cases and from 62.2% to 10.8% in moderate cases. There was a 45.9% mild case and 24.3% had no squamation. The scoring result of photosensitivity, itching, disfigurement evidenced analogously score reduction of 2.0, 3.05 and 3.12 respectively. In conclusion, it was interpreted that score of patients of DLE, before treatment was 6.83 ± 1.30 and after treatment was 3.83 ± 1.18. Unpaired 't' test was found statistically significant (p<0.05) between before and after treatment by drug. Improvement was shown in 26(70.27%) cases and 11(29.73%) cases shown no improvement at all. Marked improvement observed on the 2nd follow up visit at the end of 12 weeks. Response was good in 23(88.46%) cases, fair 2(7.69%) and poor 1(3.85%) cases. The study suggests that pimecrolimus 1% cream has significant efficacy profile for treatment option of cutaneous lupus erythematosus.
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Affiliation(s)
- L Khondker
- Department of Dermatology and Venereology, Bangabandhu Sheikh Mujib Medical University, Shahbagh, Dhaka, Bangladesh
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Khatun AA, Latif SA, Uddin MM, Wahab MA. Nonspirometric aspects of pulmonary function in subjects with dust industries. Mymensingh Med J 2011; 20:591-594. [PMID: 22081175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Bangladesh is a developing country. Many workers are involved in different industries which are polluted with dust e.g. saw mill, rice mill, jarda factory etc. The present study may give a preliminary idea about the lung function status of those workers. The study has been designed to analyze the lung function status of those workers by measuring TCO2 aiming to recommend necessary steps to improved the quality of life of workers of dust industry in our socioeconomic context. This study was to evaluate pulmonary functional status of those workers who are exposed to dust in industries like saw mill 26.00 mmol/l, rice mill 31.10 mmol/l and jarda factory 22.11 mmol/l. In all groups p values were >0.1 which was not significant except jarda factory worker in which p value was <0.001 and it was highly significant. This study was carried out to increase the awareness of the workers and to reduce the cost of employment.
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Affiliation(s)
- A A Khatun
- Department of Physiology, Mymensingh Medical College, Mymensingh, Bangladesh
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Wahab MA, Rahman MH, Khondker L, Hawlader AR, Ali A, Hafiz MA, Ansari NP. Minor criteria for atopic dermatitis in children. Mymensingh Med J 2011; 20:419-424. [PMID: 21804505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Atopic dermatitis (AD) is a common pruritic, eczematous skin disorder that runs a chronic and relapsing course. Major and minor criteria exist as guideline for arriving at a diagnosis of AD. Minor features vary with ethnicity and genetic background and can be used to aid diagnosis. A descriptive study was conducted including 210 patients of 1-12 years age who had concurrent or past history of AD according to criteria of Hanifin and Rajka. This study was conducted in the department of Dermatology of three different Hospitals of Bangladesh. Out of 33 sub-criteria of Hanifin and Rajka, 20 of which were examined encompassed tendency towards cutaneous infection, environmental factor, high IgE level, intolerance of wool, xerosis, infra-orbital fold, ichthyosis, early age of onset, itch on sweating, palmer hyperlinearity, food hypersensitivity, keratosis pilaris, pityriasis alba, facial erythema, cheilitis, hand eczema, foot eczema, intolerance of lipid solvent, scalp scaling and infra-auricular fissure. Out of 20 examined minor criteria, most common was cutaneous infection in 168(80.0%) patients followed by coursed influenced by environmental factor in 140(66.7%), high IgE level in 126(60.0%), intolerance of wool in 105(50.0%), xerosis in 92(43.8%), infra-orbital fold in 83(39.5%), ichthyosis in 72(34.3%), early age of onset in 65(31.0%), itch on sweating in 56(26.7%), palmary hyperlinearity in 52(24.8%), food hypersensitivity in 40(19.0%), keratosis pilaris in 31(14.8%), pityriasis alba in 30(14.3%), facial erythema in 25(1.9%), cheilitis in 22(10.5%), hand eczema in 19(9.0%), foot eczema in 16(7.6%), intolerance of lipid solvent in 14(6.7% ), scalp scaling in 11(5.2%) and infra-auricular fissure in 10(4.8%). These features were present singly or in combination. The result evidenced that minor criteria are many a times important for the diagnosis where major criteria are uncertain.
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Affiliation(s)
- M A Wahab
- Department of Dermatology and Venereology, Bangabandhu Sheikh Mujib Medical University, Shahbagh, Dhaka, Bangladesh
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Riscob B, Shakir M, Sundar JK, Natarajan S, Wahab MA, Bhagavannarayana G. Synthesis, growth, crystal structure and characterization of a new organic material: glycine glutaric acid. Spectrochim Acta A Mol Biomol Spectrosc 2011; 78:543-548. [PMID: 21163691 DOI: 10.1016/j.saa.2010.11.026] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2010] [Accepted: 11/19/2010] [Indexed: 05/30/2023]
Abstract
Glycine glutaric acid, a new organic compound has been synthesized and good quality single crystals were grown by slow evaporation technique. The structure of the grown crystal was elucidated by using single crystal XRD. The presence of the functional groups was confirmed by using FT-IR spectroscopy. The optical transparency was studied by using UV-vis spectrophotometer and it was found that the crystal is having high optical transparency. The thermal stability of the crystal was studied by using thermo-gravimetric and differential thermal analyses and found that it is stable up to 150°C. The room temperature dielectric studies were also carried out over the wide frequency range: 10 mHz to 10 MHz.
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Affiliation(s)
- B Riscob
- National Physical Laboratory (CSIR), Dr. K.S. Krishnan Road, New Delhi 110 012, India
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Khondker L, Wahab MA, Khan SI. Profile of lichen planus in Bangladesh. Mymensingh Med J 2010; 19:250-253. [PMID: 20395921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Lichen planus is one of the common inflammatory disorders of skin, mucous membrane, nail and hair characterized by violaceous, polish, pruritic, polygonal, flat-topped papules usually distributed bilaterally symmetrically over the extremities. Our objectives in this study were to explore the prevalence of lichen planus in large area of Dhaka in Bangladesh and to establish the clinical characteristics of lichen planus. This descriptive type of cross sectional study was carried out from September 2006 to August 2008 in the Department of Dermatology and Venereology of Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka Medical College Hospital (DMCH) and Combined Military Hospital (CMH) in Dhaka. Patients suffering from lichen planus were selected as study population. By face to face interview and clinical observations, data were collected from sample. A total 120 patients of lichen planus were selected, on the basis of age, 30(25%) were 10-30 years of age, 75(62.56%) were 30-50 years and 16(13.33%) were over 50 years of age. The mean age of the patient was 40+/-4 years. Out of 120 patients, 80(66.66%) were male and 60(33.33%) were female and eight patients (6.67%) had positive family history among highest age group (30 to 50 years). In case of duration of disease, highest percentage (68%) of cases was 15 days to 6 months and considering clinical sign, koebnerization was present 45(37.5%) cases and Wickhams striae 22(18.33%) cases. Regarding site of onset of lesion, lesions were highest 100(83.33%) in upper limbs, next lower limbs, trunk, oral mucosa etc. The distribution of clinical pattern of lichen planus showing classic pattern (68.33%) was the most common type, followed by hypertrophic, actinic, ashy dermatoses, lichen plano-pilaris, erosive or ulcerative etc. This clinico-epidemiological study of lichen planus attending in the different hospital in Dhaka, Bangladesh has shown that lichen planus is usually associated with 30 to 50 years of age group, with higher male prevalence than female, 15 days to 6 months are mainly duration of disease, koebnerization and Wickhams striae are common clinical signs, upper limbs is mainly the site of onset of lesion, and classic pattern is the most common clinical type in lichen planus.
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Affiliation(s)
- L Khondker
- Department of Medical Statistics, Bangabandhu Sheikh Mujib Medical University, Department of Dermatology and Venereology, Combined Military Hospital, Dhaka Cantonment, Dhaka, Bangladesh
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Halim KS, Khondker L, Wahab MA, Nargis F, Khan SI. Various factors of attempted suicide in a selected area of Naogaon district. Mymensingh Med J 2010; 19:244-249. [PMID: 20395920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
This descriptive type of study was carried out to determine the various factors of attempted suicide in a selected area at Patnitala and Dhamuirhat upazilla health complex of Naogaon district. All reported alive cases of attempted suicide (self poisoning, hanging, self burning or immolation, drowning etc) during the period from March to June 2003 were interviewed purposely. Data were collected by face to face interview and also from hospital records. Of the interviewed cases, the mean age was 21.4 years. Household workers, day labours, students and agricultural workers (42.6%, 23.9%, 15.5% and 11.3% respectively) were the major victims and nearly 60% had nuclear family. The highest number (77.5%) used organophosphorus compound. Highest number (25.4%) mentioned that husband mainly provoked for suicidal attempt, followed by mother and father. It was evident that 71.8% of suicidal attempt was due to their emotional stress, followed by family violence, disturbed family, social deprivation, stressful events and health problems (50.7%, 49.3%, 36.6%, 25.4%, and 8.5% respectively). It was evident that attempted suicide is proportionately higher among adolescents of unmarried, with early age at marriage, with higher income and with nuclear family compared with adult. Emotional stress, disturbed family, social deprivation, health related problems are appeared to be important reasons for attempted suicide among adolescents whereas family violence in adults.
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Affiliation(s)
- K S Halim
- Department of Epidemiology, National Institute of Preventive and Social Medicine (NIPSOM), Mohakhali, Dhaka, Bangladesh.
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Wahab MA, Ali ME, Rahman MH, Chowdhury SA, Monamie NS, Sultana N, Khondoker L. Single dose (400 mg) versus 7 day (200 mg) daily dose itraconazole in the treatment of tinea versicolor: a randomized clinical trial. Mymensingh Med J 2010; 19:72-76. [PMID: 20046175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Tinea (pityriasis) versicolor is a superficial fungal infection and one of the most commonly found pigmentary disorders of skin caused by the yeast Malassezia. Multiple topical as well as systemic therapies are available for treatment. Systemic therapies are used for extensive disease, frequent relapse or where topical agents have failed. The aim that translates the rationale of the study was to compare the efficacy, safety, tolerability and cost effectiveness of single dose 400mg versus 7 day 200 mg daily dose of itraconazole in the treatment of tinea versicolor. A clinical study was done to compare the efficacy of single dose (400 mg) of itraconazole and 7 day 200 mg daily dose of itraconazole in the treatment of extensive tinea versicolor. Total 60 patients (aged 18-50 years) were selected for the study during the period of June 2007 to May 2008 in the department of Dermatology of three different hospitals in Bangladesh. Cases having with extensive involvement, diagnosed clinically and confirmed by wood's lamp and KOH microscopy were taken. Patients were randomly allocated into equal groups. Group A was given single dose 400 mg itraconazole and Group B was given 7 day 200 mg daily itraconazole. Fifty three (88%) male and 7(12%) female were included in the study. The mean age of group A was 32.37+/-9 years and in group B 33.23+/-8 years. The mean duration of the disease in group A was 2.63+/-2 months and 2.76+/-2 months in group B. In group A clinical responders was found cure 22(73.33%) and improvement 5(16.33%) and in group B it was found cure 24(79.99%) and improvement 4(13.33%). The measure at the End point (EP1) equals to 90% response and in-group B it was found cure 24 (79.99%) and improvement 4(13.33%). (Here the End point EP2) equals to 93.33%. The EP clinical analysis however shows 91.66% response. Both single dose and 7 day daily dose of itraconazole can be effective in the treatment of tinea versicolor with extensive involvement but single dose appears to be better for improving compliance and decreasing the cost of treatment.
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Affiliation(s)
- M A Wahab
- Department of Dermatology and Venereology, Bangabandhu Sheikh Mujib Medical University, Shahbagh, Dhaka, Bangladesh
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Abstract
A consecutive series of 132 cases of reversal of sterilisation carried out in a teaching hospital in England between 1982 and 1995 was analysed. Follow-up data was obtained on 112 patients. The overall cumulative conception rate was 47% at 12 months and 55% at 24 months. Among the 71 pregnancies there were seven miscarriages (9%) and 11 ectopic pregnancies (15%). Factors affecting the outcome of surgery were examined. The pregnancy rate achieved with microsurgical techniques was significantly higher than the conventional (macrosurgical) techniques (61% v. 40%, P = 0.05). The method of sterilisation also has a significant impact on the outcome; Filshie clips 69%; Fallope ring 46%; Pomeroy technique 31% (P < 0.05). Age, associated infertility factors and the interval between sterilisation and reversal operation did not appear to have a significant impact on the outcome. When compared with IVF, reversal of sterilisation is associated with a higher ectopic rate, lower multiple pregnancy rate and a lower miscarriage rate. We conclude that reversal of sterilisation carries a higher overall success rate than IVF and is more cost effective when the method of sterilisation is by the clip or ring and when the reversal operation is carried out with microsurgical techniques.
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Affiliation(s)
- M A Wahab
- Jessop Hospital for Women, Sheffield, UK
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Coe TS, Hamilton PB, Griffiths AM, Hodgson DJ, Wahab MA, Tyler CR. Genetic variation in strains of zebrafish (Danio rerio) and the implications for ecotoxicology studies. Ecotoxicology 2009; 18:144-150. [PMID: 18795247 DOI: 10.1007/s10646-008-0267-0] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2008] [Accepted: 08/29/2008] [Indexed: 05/26/2023]
Abstract
There is substantial evidence that genetic variation, at both the level of the individual and population, has a significant effect on behaviour, fitness and response to toxicants. Using DNA microsatellites, we examined the genetic variation in samples of several commonly used laboratory strains of zebrafish, Danio rerio, a model species in toxicological studies. We compared the genetic variation to that found in a sample of wild fish from Bangladesh. Our findings show that the wild fish were significantly more variable than the laboratory strains for several measures of genetic variability, including allelic richness and expected heterozygosity. This lack of variation should be given due consideration for any study which attempts to extrapolate the results of ecotoxicological laboratory tests to wild populations.
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Affiliation(s)
- T S Coe
- Environmental and Molecular Fish Biology Group, University of Exeter, Exeter, UK
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Chowdhury MM, Rahman MH, Wahab MA. Efficacy of combination therapy for the management regime of Alopecia areata. Mymensingh Med J 2007; 16:S19-S22. [PMID: 17917625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Alopecia areata is a world wide cosmetic problem. Cases are seen in Bangladesh. Due to financial constraint and lack of modern facilities the patients of this country needs cheap, easily available and conveniently usable treatment modality. The present study revealed that the oral administration of prednisolone for 06 weeks followed by topical application of 02% minoxidil for another period of 14 weeks is noninvasive and could act as better remedy for alopecia areata. It is claimed that steroid could induce hair growth through immunosuppression rather than a direct effect on hair growth promotion. When applied together steroid it induced regrowing hair gave more encouraging result. The combination therapy indicated that the gradual loss of hair could be minimized and regrowth of hair could be made possible. To fulfill the demand for the best compliance of treatment modality further study should be directed and dictated amongst a large group of population.
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Affiliation(s)
- M M Chowdhury
- Department of Dermatology and Venereology, Combined Military Hospital, Dhaka, Bangladesh
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Wahab MA, Podd JV, Rapley BI, Rowland RE. Elevated sister chromatid exchange frequencies in dividing human peripheral blood lymphocytes exposed to 50 Hz magnetic fields. Bioelectromagnetics 2007; 28:281-8. [PMID: 17080456 DOI: 10.1002/bem.20289] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The in vitro cytomolecular technique, sister chromatid exchange (SCE), was applied to test the clastogenic potentiality of extremely low frequency (ELF) electromagnetic fields (EMFs) on human peripheral blood lymphocytes (HPBLs). SCE frequencies were scored in dividing peripheral blood lymphocytes (PBLs) from six healthy male blood donors in two rounds of experiments, R1 and R2, to determine reproducibility. Lymphocyte cultures in the eight experiments conducted in each round were exposed to 50 Hz sinusoidal (continuous or pulsed) or square (continuous or pulsed) MFs at field strengths of 1 microT or 1 mT for 72 h. A significant increase in the number of SCEs/cell in the grouped experimental conditions compared to the controls was observed in both rounds. The highest SCE frequency in R1 was 10.03 for a square continuous field, and 10.39 for a square continuous field was the second highest frequency in R2. DNA crosslinking at the replication fork is proposed as a model which could explain the mechanistic link between ELF EMF exposure and increased SCE frequency.
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Affiliation(s)
- M A Wahab
- Institute of Molecular BioSciences, Massey University, Palmerston North, New Zealand
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Ahmed N, Azad K, Rahman MM, Wahab MA, Haque MR, Mollah FH, Arslan MI. Role of cardiac troponin I in staging and prognosis of congestive heart failure subjects. Mymensingh Med J 2007; 16:12-6. [PMID: 17344772 DOI: 10.3329/mmj.v16i1.240] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Congestive heart failure is the one of the major cardiovascular disorder that is increasing in incidence and cause of death globally. Mortality rate has increased 40%-50% in advanced cardiac failure and 15%-25% in mild to moderate cardiac failure within one year of diagnosis. There is no established biochemical marker for the diagnosis, prognosis and staging of heart failure. Cardiac Troponin I may be a novel useful tool in identifying patients with Heart failure who are at increased risk for progressive ventricular dysfunction and death. Thirty six congestive heart failure cases and thirty six healthy controls were included in this study and serum cardiac troponin I and Ejection fraction were measured. All the study subjects were grouped according to the NYHA class they belong. Cardiac troponin I was significantly higher in CHF cases than the controls. Troponin I also significantly differed among groups. EF of cases was significantly lower than the controls and also differed among groups. A significant negative correlation between cardiac troponin I and progressive decline of ejection fraction was evident in this study. Cardiac troponin I increased progressively with progression of heart failure. Thus, Cardiac troponin I could be used to stratify patients undergoing heart failure in to high and low risk groups for future cardiac events. Cardiac troponin I could also be used as a very important marker for the prognosis of the patients with congestive heart failure.
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Affiliation(s)
- N Ahmed
- Department of Biochemistry, Rangpur Medical College, Rangpur
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Rahman MM, Azad K, Ahmed N, Haque MR, Wahab MA, Asad HB, Mollah FH, Arslan MI. Spot morning urine protein creatinine ratio and 24 hour urinary total protein excretion rate. Mymensingh Med J 2006; 15:146-9. [PMID: 16878094 DOI: 10.3329/mmj.v15i2.33] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Proteinuria helps to establish the diagnosis of most renal diseases and also to predict the outcome of such diseases. Proteinuria is biochemically represented by measuring the protein concentration in timed collection of 24 hour urine. But, 24-hour timed urine collection is time consuming, cumbersome and often unreliable due to collection errors and also results in undue delay on diagnostic process. An alternate approach avoiding arduous and inaccurate timed urine collection can be the measurement of protein creatinine ratio in spot morning urine. This study was aimed to evaluate whether the spot morning urine protein creatinine ratio can be a reliable alternative to 24-hour urinary total protein (UTP) estimation. The study was carried out in the department of Biochemistry, Bangabandhu Sheikh Mujib Medical University, Dhaka on 50 (fifty) non-diabetic Chronic Renal Disease (CRD) patients with an age ranging from 18 -70 years. The study subjects were grouped into mild, moderate and severe CRD on the basis of GFR. Urinary protein and creatinine concentrations were measured in spot morning urine samples and their ratios were calculated. Urinary protein measured in 24-hour timed collected urine samples gave the 24-hour UTP excretion rate. In our study, spot morning urine protein creatinine ratio significantly correlated with 24-hour UTP excretion rate in all CRD patients. Severe CRD patients gave significant positive correlation (p<0.05), whereas mild and moderate CRD patients gave very highly significant positive correlation (p<0.001). Therefore, it may be suggested that protein creatinine ratio in spot morning urine can be accepted as a reliable and alternative to 24-hour UTP excretion rate in non-diabetic chronic renal disease patients. This simple and inexpensive procedure will thus simplify the way of establishing the severity of renal disease along with its prognosis.
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Affiliation(s)
- M M Rahman
- Dept. of Biochemistry, BSMMU, Shahbag, Dhaka-1000
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Banu S, Mollah FH, Alam MK, Rahman MA, Hamid MA, Wahab MA, Arslan MI. Serum homocysteine concentration in patients with acute MI and chronic IHD. Mymensingh Med J 2005; 14:54-7. [PMID: 15695956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
This was an observational study carried out in the Department of Biochemistry, Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka; with the active co-operation of Coronary Care Unit (CCU) of BSMMU & National Institute of Cardiovascular Disease (NICVD), Dhaka. This study was carried out from March 2002 to January 2003. Total seventy (70) subjects were studied. Out of them 20 were of Acute MI, 20 were Chronic ischemic heart disease (CHD) and 30 were age and sex matched healthy controls. Hospitalized diagnosed patients were selected by taking history, clinical examination and several investigations like ECG. Echocardiogram, Angiogram and several enzymes assay. Several studies in many countries showed that serum homocysteine (Hcy) was elevated in IHD Patient. Cardiovascular disease is alarmingly increasing in Bangladesh. So our aim and objective of the study was to find out the association of serum Hcy with Acute MI and chronic ischemic heart disease (CHD) patients in our population. Mean Hcy level of Acute MI were 21.16 +/- 4.56 (micromol/l), 27.55 +/- 10.40 (micromol/l) and that of control was 13.03 +/- 10.51(micromol/l). Serum Hcy was significantly higher in both cases than control. But insignificant difference was found between AMI vs CHD (P> 0.05). Quantitative measurement of serum Hcy was measured by fluorescence polarization Immunoassay (FPIA) in IMX analyzer (Abbott-USA).
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Affiliation(s)
- S Banu
- Dept. of Biochemistry, Shahabuddin Medical Collage, Gulsan, Dhaka
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Islam MA, Shameem IA, Ahasan DN, Choudhury GM, Wahab MA. Necessity of antibiotics prophylaxis during extracorporeal shock wave lithotripsy. Mymensingh Med J 2005; 14:58-60. [PMID: 15695957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
A total of 360 patients with renal and ureteral calculi who had sterile urine before extracorporeal shock wave lithotripsy (ESWL) and did not have any increased risk of infection received Tab. Ciprfloxacin (500 mg) 12 hourly for the next 5 days or no prophylaxis were included in this prospective study. Patients were followed by urinalysis and culture together with clinical evaluations. In antibiotic prophylactic group 10 (6.4%) had post ESWL urine culture positive while in without prophylaxis 13 (8.8%) had positive urine culture. The incidence of urinary tract infection after ESWL is extremely low, provided that patients have sterile urine before the procedure.
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Affiliation(s)
- M A Islam
- Department of Urology, BSMMU, Dhaka, Bangladesh
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Rashid HU, Khanam A, Wahab MA, Iqbal KM. Renal transplantation in Bangladesh: experience with conventional therapy. Transplant Proc 2003; 35:158. [PMID: 12591347 DOI: 10.1016/s0041-1345(02)03833-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- H U Rashid
- Department of Nephrology and Urology, Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh
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Affiliation(s)
- H U Rashid
- Department of Nephrology, Bangabandhu Sheikh Mujib Medical University, Dhaka, Bangladesh.
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Wahab MA, Karantzis P, Eccersley PS, Russell IF, Thompson JW, Lindow SW. A randomised, controlled study of uterine exteriorisation and repair at caesarean section. Br J Obstet Gynaecol 1999; 106:913-6. [PMID: 10492101 DOI: 10.1111/j.1471-0528.1999.tb08429.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
OBJECTIVE To determine the surgical and anaesthetic benefits and problems associated with the practice of routine exteriorisation of the uterus to facilitate repair at caesarean section. DESIGN A randomised controlled study of women undergoing caesarean section. After establishment of anaesthesia, women were randomised to either exteriorisation and uterine repair or suture of the uterus in the abdomen. SETTING A maternity hospital in the United Kingdom. MAIN OUTCOME MEASURES Peri-operative haemoglobin change, duration of operation, maternal morbidity and length of hospital stay. Intra-operative pain, nausea, vomiting, pulling or tugging sensations were secondary outcome measures. RESULTS Three hundred and sixteen women were randomised, of whom 288 were subsequently analysed (139 women in whom the uterus was exteriorised and 149 where the uterus was not exteriorised). Exteriorisation of the uterus, an elective caesarean section and a spinal or general anaesthesia each had a statistically significant association with reduced blood loss (P < 0.05). There were no statistically significant differences between the two groups with regard to intra-operative complications or pain, nor were there any statistically significant difference in post-operative wound sepsis, pyrexia, deep vein thrombosis, blood transfusion or length of hospital stay. CONCLUSION With effective anaesthesia, exteriorisation of the uterus for repair following caesarean delivery is not associated with significant problems and is associated with less blood loss.
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Affiliation(s)
- M A Wahab
- Department of Obstetrics and Gynaecology, Hull Maternity Hospital
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Subei IM, Abdelazim A, Bayoumi A, Wahab MA, El Deriny S. The effect of different types of intragastric balloons with and without a behavior modification program in morbid obesity. Saudi J Gastroenterol 1996; 2:63-8. [PMID: 19864829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/09/2023] Open
Abstract
Two consecutive and matched groups of morbidly obese patients, i.e. group (1) and (2) were selected to be treated with Garren-Edward Bubble (18 patients) and the Danish-Ballobe (10 patients), respectively, and according to the American FDA criteria. All patients were put on 1000-1200 K. cal diet and given the choice to enroll in the behavior modification program (BMP) or not; (15) patients enrolled in it (group A) and (13) patients refused (group B). At the end of the treatment period (i.e. 3 months group 1; 4 months group 2) the mean loss in the body mass index (BMI) for group (1) and (2) were 5.46 +/- 4.6 kg/m(2), and 3.98 +/- 5.5 kg/m(2) respectively. With insignificant statistical difference (P>1.0). While the mean loss in the BMI was 7.17 +/- 4.54 kg/m(2) and 1.85 +/- 0.92 kg/m(2) for group A & B respectively. With a very significant statistical difference (P< 0.01). No major complication was noticed except that in two patients (group 1) and four patients (group 2), the ballon had to be removed within the first week of insertion due to intolerance. In conclusion, although both balloons are safe, they are weakly effective and the main effect could be attributed to the BMP.
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Affiliation(s)
- I M Subei
- Department of Medicine and Clinical Psychology-Psychiatry, Erfan General Hospital, Jeddah, Saudi Arabia
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Rashid HU, Rahman M, Wahab MA, Kibria G, Iqbal KM. Renal transplantation in Bangladesh. Transplant Proc 1995; 27:1461-2. [PMID: 7878942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- H U Rashid
- Department of Nephrology and Urology, Institute of Postgraduate Medicine and Research, Dhaka, Bangladesh
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Rashid HU, Rahman M, Wahab MA, Kibria G, Rahman S, Jinnat S. Living-related kidney transplantation using low-dose triple immunosuppression. Transplant Proc 1994; 26:2089. [PMID: 8066680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- H U Rashid
- Department of Nephrology, Institute of Postgraduate Medicine and Research, Dhaka, Bangladesh, India
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Rahman M, Wahab MA, Rashid HU, Kibria SG, Rahman S, Khan MF. Short-term cyclosporine conversion in living related donor renal transplantation--preliminary observations. Transplant Proc 1992; 24:1696-7. [PMID: 1412801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- M Rahman
- Department of Nephrology and Urology, Institute of Postgraduate Medicine and Research, Dhaka, Bangladesh
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Rashid HU, Rasul G, Rahman M, Jinnat S, Wahab MA. Experience of kidney transplantation in Bangladesh. Transplant Proc 1992; 24:1831. [PMID: 1412868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- H U Rashid
- Department of Nephrology and Urology, Institute of Postgraduate Medicine and Research, Dhaka, Bangladesh
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Hlady WG, Islam MN, Wahab MA, Johnson SD, Waiz A, Krawczynski KZ. Enterically transmitted non-A, non-B hepatitis associated with an outbreak in Dhaka: epidemiology and public health implications. Trop Doct 1990; 20:15-7. [PMID: 2106181 DOI: 10.1177/004947559002000105] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Investigation of an outbreak of hepatitis in Dhaka implicated enterically transmitted non-A, non-B (ET-NANB) hepatitis as the etiologic agent. This observation was made by exclusion in 17 of 19 patients, and confirmed serologically in one randomly selected patient by a fluorescent antibody blocking assay specific for ET-NANB hepatitis. These findings reinforce earlier suspicions that ET-NANB may be an important cause of acute hepatitis in Bangladesh. The epidemiology of ET-NANB hepatitis is discussed, and public health recommendations are made.
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Affiliation(s)
- W G Hlady
- Epidemiology Department, International Centre for Diarrhoeal Disease Research, Dhaka, Bangladesh
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46
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Abstract
(J Bangladesh Coll Phys Surg 2006; 24 : 110-113)
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47
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Fahmida A, Wahab MA, Rahman MM. Pattern of psychiatric morbidity among the patients admitted in a private psychiatric clinic. Bangladesh J Med Sci 1970. [DOI: 10.3329/bjms.v8i1.3186] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Background: Mental health problem is a major public health issue in the world across the developed and developing countries. However, data in most of the developing countries including Bangladesh are scarce. In Bangladesh, socio-political situation is insecure and unstable with poverty and vulnerable to natural disaster which causes psychiatric morbidity. The pattern of psychiatric morbidity in private clinic is quite different from that in government hospital. Objective: This study was aimed to assess the diagnostic pattern of psychiatric morbidity among the admitted patients in a private psychiatric clinic. Methodology: The study was carried out in a 20 bedded private psychiatric clinic in the heart of Dhaka city. All the information including longitudinal histories of patients was recorded in files and the diagnosis was confirmed by psychiatrist. Admission and discharge notes were recorded in register. Socio-demographic parameters and family history of mental illness were collected from the record file of individual patient. Results: Among 304 patients 184 (60.53%) were males and 120 (36.47%) were females. More than 50% of patients were in the age group of 18 to 37 years. Most common psychiatric disorders were schizophrenia and other psychotic disorders (39.4%), mood disorder (18.75%), borderline personality disorder (3.6%), conduct disorder (2.3), somatoform disorder (1.6%), anxiety disorder (0.7%), organic psychiatric disorder (2%), impulse control disorder (1.3%) and adjustment disorder (0.7%). Conclusion: Major forms of psychiatric disorders are common both in urban and rural areas of Bangladesh. Keywords: Psychiatric morbidity doi: 10.3329/bjms.v8i1.3186 Bangladesh Journal of Medical Science Vol.8 No. 1-2; 2009 23-28
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