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Alam K, Srivastava S, Singh B, EmptyYN Y S, Kumar R, Kumar R, Sakhahari DS. Cryopreservation of bovine semen using extract of Cinnamomum zeylanicum. Cryo Letters 2024; 45:168-176. [PMID: 38709188] [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] [Subscribe] [Scholar Register] [Indexed: 05/07/2024]
Abstract
BACKGROUND Antioxidants minimise oxidative stress and enhance sperm quality in the process of cryopreservation. OBJECTIVE To assess the impact of Cinnamomum zeylanicum extract as an additive during the post-dilution and post-thaw stages of Murrah buffalo semen cryopreservation. MATERIALS AND METHODS The semen sample was diluted using Tris-Egg-Yolk-Citric-Acid-Fructose-Glycerol extender and subsequently divided into three groups: Group 1, TEYCAFG without any additives or controls (C); Group 2, TEYCAFG fortified with a 50 ug/mL aqueous extract of cinnamon (T1); and Group 3, TEYCAFG fortified with a 50 ug/mL ethanolic extract of cinnamon (T2). The evaluation included an assessment of progressive motility, live spermatozoa, sperm abnormalities, HOST, CMPT, and enzyme leakage (GOT and GPT) at both the post-dilution and post-thaw stages. RESULTS The groups that received cinnamon supplementation demonstrated statistically significant improvements (p<0.05) in various parameters, including an increase in the progressive motility, live spermatozoa, and HOS-positive spermatozoa, as well as greater distance traveled by vanguard spermatozoa compared to the control group. Furthermore, the cinnamon-added groups exhibited a significant decrease (p<0.05) in the percentage of sperm abnormalities and lower enzyme leakage (GOT and GPT) in post-thawed semen. CONCLUSION Aqueous extract of C. zeylanicum at a concentration of 50 µg/mL provides superior protection of sperm structures and functions as compared to both the ethanolic extract of C. zeylanicum at the same concentration and the control group. Doi.org/10.54680/fr24310110712.
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Affiliation(s)
- K Alam
- Department of Veterinary Gynaecology and Obstetrics, College of Veterinary Science and Animal Husbandry, Acharya Narendra Deva University of Agriculture and Technology Kumarganj, Ayodhya, UP-224229, India
| | - S Srivastava
- Department of Veterinary Gynaecology and Obstetrics, College of Veterinary Science and Animal Husbandry, Acharya Narendra Deva University of Agriculture and Technology Kumarganj, Ayodhya, UP-224229, India
| | - B Singh
- Department of Veterinary Gynaecology and Obstetrics, College of Veterinary Science and Animal Husbandry, Acharya Narendra Deva University of Agriculture and Technology Kumarganj, Ayodhya, UP-224229, India
| | - Saurabh EmptyYN Y
- Department of Veterinary Gynaecology and Obstetrics, College of Veterinary Science and Animal Husbandry, Acharya Narendra Deva University of Agriculture and Technology Kumarganj, Ayodhya, UP-224229, India
| | - R Kumar
- Department of Veterinary Gynaecology and Obstetrics, College of Veterinary Science and Animal Husbandry, Acharya Narendra Deva University of Agriculture and Technology Kumarganj, Ayodhya, UP-224229, India.
| | - R Kumar
- Department of Veterinary Gynaecology and Obstetrics, College of Veterinary Science and Animal Husbandry, Acharya Narendra Deva University of Agriculture and Technology Kumarganj, Ayodhya, UP-224229, India
| | - D S Sakhahari
- Department of Veterinary Gynaecology and Obstetrics, College of Veterinary Science and Animal Husbandry, Acharya Narendra Deva University of Agriculture and Technology Kumarganj, Ayodhya, UP-224229, India
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Iqbal M, MORSHED R, Ershad S, Ahsan Z, Ishraq M, Choudhury S, Malik F, Ahmed M, Alam K, Rahman M, Hassan M, Alam S, Adhikary D, Hassan M, Arslan M. WCN23-1235 STATUS OF ANTIBODY AGAINST SEVERE ACUTE RESPIRATORY SYNDROME CORONAVIRUS 2: PRELIMINARY REPORTS ON SEROPREVALENCE OF COVID 19 IN AMONG HEALTH CARE WORKERS. Kidney Int Rep 2023. [PMCID: PMC10025674 DOI: 10.1016/j.ekir.2023.02.1041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2023] Open
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Arora R, Alam F, Zaka-Ur-Rab A, Maheshwari V, Alam K. 32P Neutrophil to lymphocyte ratio (NLR) as a surrogate clinical marker for Ki-67 in breast cancer. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.03.047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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Khatun M, Akter P, Yunus S, Alam K, Pedersen C, Byrskog U, Erlandsson K. Challenges to implement evidence-based midwifery care in Bangladesh. An interview study with medical doctors mentoring health care providers. Sex Reprod Healthc 2021; 31:100692. [PMID: 34990978 DOI: 10.1016/j.srhc.2021.100692] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 12/05/2021] [Accepted: 12/17/2021] [Indexed: 11/19/2022]
Abstract
BACKGROUND In 2013 the first midwives in Bangladesh to be educated according to international standards completed their course and were awarded a diploma. Sixty percent of their training took place in clinical placement sites. In order to achieve appropriate mentor support while in clinical practice, a mentorship programme was initiated whereby local doctors were appointed by Save the Children. The aim of this study is to describe the mentors' purpose and the actions they took to improve midwifery care at clinical placement sites. Their appointment was intended to support local Health Care Providers (HCPs) at clinical placement sites meant for educating midwifery students in evidence-based midwifery care. METHODS An open-ended interview study with 14 mentors. The data was analysed using content analysis. RESULTS The main category, the theme that emerged from the analysis was "Creating commitment". "Creating commitment" describe how the mentors; the medical doctors employed by Save the Children, "Motivate", "Educate", "Mentor", "Advocate" and "Communicate" (subcategories) to creating commitment for quality midwifery care "In the organization of care" and "In clinical care practices" (categories). As intended, they enabled HCPs, midwifery students, and newly graduated midwives to provide quality midwifery care. CONCLUSIONS Using medical doctors' status and power to support the development of a newly emerging midwifery cadre in a country where midwifery is just emerging as a profession is because midwives integrated in the health system will improve the birthing process, improve life chances for newborns, and reduce morbidity and mortality in Bangladesh. It is recommended for implementation in other similar national contexts.
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Affiliation(s)
| | | | - Samiha Yunus
- Save the Children Bangladesh, House No-CWN(A)35, House No-43; Gulshan-2, Dhaka, Bangladesh
| | - Khairul Alam
- Save the Children Bangladesh, House No-CWN(A)35, House No-43; Gulshan-2, Dhaka, Bangladesh
| | - Christina Pedersen
- School of Education, Health and Social Studies, Dalarna University, 791 88 Falun, Sweden
| | - Ulrika Byrskog
- School of Education, Health and Social Studies, Dalarna University, 791 88 Falun, Sweden
| | - Kerstin Erlandsson
- School of Education, Health and Social Studies, Dalarna University, 791 88 Falun, Sweden. https://twitter.com/erlandsson_kerstin
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Y. El-Sayed M, S. Refat M, Altalhi T, H. Eldaroti H, Alam K. Preparation, spectroscopic, thermal and molecular docking studies of covid-19 protease on the manganese(II), iron(III), chromium(III) and cobalt(II) creatinine complexes. B CHEM SOC ETHIOPIA 2021. [DOI: 10.4314/bcse.v35i2.13] [Citation(s) in RCA: 1] [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: 11/17/2022] Open
Abstract
ABSTRACT. Creatinine biomolecule has three different coordination modes through the (exocyclic O(5) and ring N(1)), (imine N(2) and ring N(1)) or as monodentate ligand via exocyclic O(1)). The FTIR and electronic spectra of the synthesized manganese(II), iron(III), chromium(III), and cobalt(II) complexes consistent with the coordinated behavioral derived from the structural analyses. Thermogravimetric data agree with the stoichiometry and proposed formulas [Mn(C4H7N3O)2(Cl)2]4H2O, [Fe(C4H7N3O)2(Cl)2]Cl.6H2O, [Cr(C4H7N3O)2(Cl)2]Cl.6H2O, and [Co(C4H7N3O)2(Cl)2]6H2O. Four new transition metal complexes derived from the reaction of creatinine chelate and metal salt (MnCl2.4H2O, FeCl3.6H2O, CrCl3.6H2O, and CoCl2.6H2O), were prepared with 1:2 (metal: ligand) stoichiometry, isolated and well characterized by a different spectral and analytical techniques including FTIR, UV/Vis, magnetic susceptibility, molar conductance, elemental analysis, and TGA/DrTGA/DTA. The solid complexes were formed with the binding of the creatinine ligand through exocyclic O(5) and ring N(1) and presented as an octahedral geometry. In addition molecular docking calculations have been performed between complexes of manganese(II), iron(III), chromium(III) and cobalt(II) with creatinine biomolecule ligand with the Covid-19 protease (6LU7) to determine the best binding site and its inhibitory effect.
KEY WORDS: Creatinine, Coordination, Transition metals, TGA/DTA, Octahedral geometry
Bull. Chem. Soc. Ethiop. 2021, 35(2), 399-412.
DOI: https://dx.doi.org/10.4314/bcse.v35i2.13
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Kashem TS, Begum NAS, Sayed A, Arefin S, Alam K, Amin R, Rashid HU. An unusual and late presentation of urinary leak post-kidney transplantation requiring ureteroureterostomy at the single tertiary center of Bangladesh: a case report. Korean Journal of Transplantation 2021. [DOI: 10.4285/atw2021.or-1196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Affiliation(s)
| | - NAS Begum
- Department of Nephrology, Kidney Foundation Hospital, Dhaka, Bangladesh
| | - A Sayed
- Department of Nephrology, Kidney Foundation Hospital, Dhaka, Bangladesh
| | - S Arefin
- Department of Nephrology, Kidney Foundation Hospital, Dhaka, Bangladesh
| | - K Alam
- Department of Nephrology, Kidney Foundation Hospital, Dhaka, Bangladesh
| | - R Amin
- Department of Nephrology, Kidney Foundation Hospital, Dhaka, Bangladesh
| | - HU Rashid
- Department of Nephrology, Kidney Foundation Hospital, Dhaka, Bangladesh
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Pakhchanian H, Raiker R, Alam K, Hou A, Patel V. 335 Trends in dermatological prescribing patterns during the COVID pandemic. J Invest Dermatol 2021. [PMCID: PMC8053924 DOI: 10.1016/j.jid.2021.02.357] [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: 11/15/2022]
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Eboreime O, Ali M, Alam K, Sarvestani A, Jenson S. Novel cross-flow electrostatic precipitator: Numerical and experimental study. J Air Waste Manag Assoc 2021; 71:447-461. [PMID: 33198597 DOI: 10.1080/10962247.2020.1850544] [Citation(s) in RCA: 1] [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: 07/27/2020] [Revised: 10/18/2020] [Accepted: 11/02/2020] [Indexed: 06/11/2023]
Abstract
Electrostatic precipitators (ESP) are used extensively for removing particulates from a gas flow by charging the particles and then removing them in the presence of an electric field. Traditional ESP designs use the walls of the flow channel as the grounded collection surface. The objective of this present study is to evaluate a novel ESP configuration, recently patented by Ohio University's Electrostatic Laboratory, in which an array of vertical surfaces of cylindrical geometry are placed in a crossflow configuration and used as grounded collection surfaces. A numerical approach was adopted by developing and implementing User-Defined Functions (UDFs) in ANSYS Fluent computational fluid dynamics (CFD) software to build a two-dimensional cross-flow ESP model, for the first time, for the gas flow and particulate capture. The two-dimensional numerical models proved useful in shedding light on the basics of the collection process in the novel cross-flow ESP. In the studied configuration, the collection of the particles on the collector surface was limited to the anterior and posterior surfaces of the first and second collection rows, respectively. The collection at the posterior surface of the second row presented interesting behavior, with the particles becoming entrained in the wake of the collectors and the electric field from the discharge electrode located downstream that was opposite to the fluid flow direction. The output of the simulation underestimated the experimental data. The lower efficiency prediction of the model could have been due to the vibration of the collection electrodes, collection by the mist formed in the wet system, and particle agglomeration in the experiments. The results of this study provide critical information in improving the particulate efficiency of novel cross-flow ESP and other similar cross-flow ESP systems.Implications: A novel Electrostatic precipitator (ESP) configuration (recently patented) was evaluated. A numerical approach was adopted to build a cross-flow ESP model, for the first time, for the gas flow and particulate capture. The collection of the particles on the collector surface was limited to the anterior and posterior surfaces of the first and second collection rows. Also, the particles were entrained in the wake of the collectors. The output of the simulation underestimated the experimental data. The results of this study provide critical information in improving the particulate efficiency of novel cross-flow ESP and other similar cross-flow systems.
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Affiliation(s)
- Ohioma Eboreime
- Department of Mechanical Engineering, Ohio University, Athens, OH, USA
| | - Muhammad Ali
- Department of Mechanical Engineering, Ohio University, Athens, OH, USA
- Center of Advanced Materials and Processing, Ohio University, Athens, OH, USA
| | - Khairul Alam
- Center of Advanced Materials and Processing, Ohio University, Athens, OH, USA
| | - Alireza Sarvestani
- Department of Mechanical Engineering, Mercer University, Atlanta, GA, USA
| | - Sean Jenson
- Department of Mechanical Engineering, Ohio University, Athens, OH, USA
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Alam K, Kabusure KM, Asamoah BO, Nuutinen T, Baah M, Mohamed S, Matikainen A, Heikkinen J, Rekola H, Roussey M, Kuittinen M, Hakala TK. Double resonant plasmonic lattices for Raman studies. Nanoscale 2020; 12:23166-23172. [PMID: 33200163 DOI: 10.1039/d0nr05255h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We demonstrate radiation induced enhancement of both the in coupling of Raman excitation wavelength and Raman signal in plasmonic nanoparticle lattices. Rectangular nanoparticle lattices show two independently controllable lattice resonances, which we tune to be resonant with both the Raman excitation wavelength and the Raman transitions of rhodamine 6G molecules. We demonstrate that these narrow and intense resonances produced by the nanoparticle lattices allow for Raman transition specific enhancements. The system allows for independent tuning of both resonance conditions, enabling an efficient and versatile platform for Raman studies of various molecules.
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Affiliation(s)
- Khairul Alam
- Department of Physics and Mathematics, University of Eastern Finland, Yliopistokatu 2, P.O Box 111, FI-80101, Joensuu, Finland.
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Li P, Alam K, Partanen H, Kuittinen M, Kang G, Turunen J. Large-angle beaming from asymmetric nanoslit-corrugation structures. Nanotechnology 2020; 31:145204. [PMID: 31887725 DOI: 10.1088/1361-6528/ab662e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The beaming effect in single apertures surrounded by periodic corrugations and the manipulation of beaming directions from such structures has gained considerable attention since discovery. Different materials and structural profiles have been studied in this context but directional beaming at angles larger than 45° has not been achieved. We design and demonstrate nanoslits in a gold film flanked by corrugations, which give rise to beaming angles ranging from 45° to 60°. While the previous designs are based on achieving constructive interference at the aimed beaming angle, our approach complements such constructive interference with destructive interference at 0° and, as a result, enhances the directional beaming effect at angles larger than 45°. The structures are fabricated by electron beam lithography with two consecutive lift-off processes. The experimental far-field intensity distributions agree well with the designs.
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Affiliation(s)
- Peng Li
- School of Optics and Photonics, Beijing Institute of Technology, 100081 Beijing, People's Republic of China. Department of Physics and Mathematics, University of Eastern Finland, PO Box 111, FI-80101 Joensuu, Finland
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Siraj MM, Khondokar NN, Alam K, Talukder A, Khanal A, Habib SA, Shakil SS, Rahman F. Successful Multi-vessel Percutaneous Coronary Intervention for Recent Myocardial Infarction in a Patient with Dextrocardia and Situs Inversus. Mymensingh Med J 2020; 29:464-468. [PMID: 32506107] [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
Dextrocardia with situs inversus is a state which is characterized by abnormal positioning of the heart and other internal organs. It is a rare congenital anomaly and the exact cause is not known. More than 60 recognized genes are significant for the proper positioning and patterning of the organs in the body. However, a specific genetic cause of dextrocardia with situs inversus has not been identified and inheritance prototypes have not been established in the majority cases. There are partial available case reports of successful percutaneous coronary intervention (PCI) in these patients who have atherosclerotic coronary artery disease, especially when presenting with myocardial infarction. PCI is technically difficult because of dextrocardia. We hereby describe a 51-year-old male, who had a recent inferior wall myocardial infarction and underwent successful coronary angiography and PCI at a tertiary level hospital in Dhaka, Bangladesh.
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Affiliation(s)
- M M Siraj
- Dr Mohamed Mausool Siraj, MD Cardiology Phase B Student, University Cardiac Centre, Bangabandhu Sheikh Mujib Medical University (BSMMU), Dhaka, Bangladesh; E-mail:
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Dutta A, Alam K, Nuutinen T, Hulkko E, Karvinen P, Kuittinen M, Toppari JJ, Vartiainen EM. Influence of Fano resonance on SERS enhancement in Fano-plasmonic oligomers. Opt Express 2019; 27:30031-30043. [PMID: 31684257 DOI: 10.1364/oe.27.030031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 09/13/2019] [Indexed: 06/10/2023]
Abstract
Plasmonic oligomers can provide profound Fano resonance in their scattering responses. The sub-radiant mode of Fano resonance can result in significant near-field enhancement due to its light trapping capability into the so-called hotspots. Appearance of these highly localized hotspots at the excitation and/or Stokes wavelengths of the analytes makes such oligomers promising SERS active substrates. In this work, we numerically and experimentally investigate optical properties of two disk-type gold oligomers, which have different strength and origin of Fano resonance. Raman analysis of rhodamine 6G and adenine with the presence of the fabricated oligomers clearly indicates that an increment in the strength of Fano resonance can improve the Raman enhancement of an oligomer significantly. Therefore, by suitable engineering of Fano lineshape, one can achieve efficient SERS active substrates with spatially localized hotspots.
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Ali M, Hedrick C, Lutfullaeva A, Alam K. Performance evaluation of novel wet vibrational precipitator. J Air Waste Manag Assoc 2019; 69:743-751. [PMID: 30698502 DOI: 10.1080/10962247.2019.1576555] [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: 06/06/2018] [Accepted: 01/28/2019] [Indexed: 06/09/2023]
Abstract
This study reports the development, construction, and initial testing of a novel vibrational precipitator (VP), patented at Ohio University in 2016, that uses vibrating metal cables with water running over them to capture particulate matter in an exhaust stream. Unlike traditional electrostatic precipitators relying on electric energy to capture particles, this new system uses the concept of vortex shedding to produce vibrations in vertical cables running perpendicular to an exhaust stream. Collisions between particles in the exhaust stream and these vibrating cables cause the particles to land onto a thin film of flowing water around the cables, which carries the particles downward for collection and removal. Initial tests with air containing particulates of 3 micron average particle size show capture efficiencies up to 54% using U.S. Environmental Protection Agency (EPA) Method 5 to measure the particulate concentrations at the upstream and downstream of a VP comprising 8 cells. These results show that this system, without consuming any electric energy, has a significant potential to be a simple and cost-effective way to treat particle-laden exhaust gases. Implications: In this work, for the first time, a novel precipitator is investigated that captures particles without using any particle charging and (hence) any electricity. The capture mechanism is governed by vibrations of collection electrodes, which are vertical steel cables wetted through continuous flow of water. Without any discharge electrodes, electrode suspension mechanism, and ability of the system to be installed in existing ducts, the novel precipitator becomes a simple chamber housing containing multiple collection electrode cells. The preliminary results show that this new technology can achieve net particulate matter capture efficiency of 54%. This paves a pathway forward for reducing capital and operating cost of air pollution control systems.
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Affiliation(s)
- M Ali
- a Electrostatic Precipitator Laboratory, Center for Advanced Materials and Processing, Mechanical Engineering Department , Ohio University , Athens , OH , USA
| | - C Hedrick
- a Electrostatic Precipitator Laboratory, Center for Advanced Materials and Processing, Mechanical Engineering Department , Ohio University , Athens , OH , USA
| | - A Lutfullaeva
- a Electrostatic Precipitator Laboratory, Center for Advanced Materials and Processing, Mechanical Engineering Department , Ohio University , Athens , OH , USA
| | - K Alam
- a Electrostatic Precipitator Laboratory, Center for Advanced Materials and Processing, Mechanical Engineering Department , Ohio University , Athens , OH , USA
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Ali M, Al-Majali YTA, Kennedy M, Alam K. Integration of novel hybrid composite discharge electrode with semi-pilot novel cross-flow electrostatic precipitator. J Air Waste Manag Assoc 2018; 68:1346-1356. [PMID: 30095364 DOI: 10.1080/10962247.2018.1509807] [Citation(s) in RCA: 1] [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: 05/06/2018] [Revised: 07/10/2018] [Accepted: 08/05/2018] [Indexed: 06/08/2023]
Abstract
Wet electrostatic precipitators (WESPs) are modern-era pollution control systems specifically designed to capture ultrafine particles as well as acid mist, highly resistive and sticky particles; however, this requires the use of expensive corrosion-resistant metal alloys. The work presented here is part of a continuing study at Ohio University aimed at reducing the cost of WESPs by using a novel combination of a polymer collector surfaces with a hybrid composite discharge electrode. In this study, a hybrid composite discharge electrode was tested, for the first time, inside a semi-pilot-scale experimental setup, with collection surfaces consists of a vertical array of strands. Particle laden gases were passed through this array of polymer ropes, which were kept wet by a small flow of water. The discharge electrodes were composite laminates of carbon fibers in a polymer matrix enclosing a metal mesh. The preliminary results showed that this new integrated system of composite discharge electrode and polymer collector surfaces can match or exceed the performance of a conventional metal alloy electrostatic precipitator (ESP) with metal discharge electrodes. There are additional advantages due to the system being compact, lightweight, and highly corrosion resistant. Implications: This study focused on integrating and assessing performance of a novel hybrid composite electrode (HCE) inside semi-pilot novel cross-flow electrostatic precipitator at conditions typically observed in coal-fired power plant exhausts. The results were collected for particulate collection efficiencies and were compared with a rigid metal electrode. The HCE outperformed metal electrode by showing higher particulate collection efficiency. This result showcases substantial potential for these two new technologies (HCE and cross-flow system) as a substitute for conventional metal based wet ESPs.
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Affiliation(s)
- M Ali
- a Electrostatic Precipitator Laboratory, Mechanical Engineering Department , Ohio University , Athens , OH , USA
| | - Y T A Al-Majali
- a Electrostatic Precipitator Laboratory, Mechanical Engineering Department , Ohio University , Athens , OH , USA
| | - M Kennedy
- a Electrostatic Precipitator Laboratory, Mechanical Engineering Department , Ohio University , Athens , OH , USA
| | - K Alam
- a Electrostatic Precipitator Laboratory, Mechanical Engineering Department , Ohio University , Athens , OH , USA
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Chowdhury M, Iqbal M, Roy D, Alam K, Faroque M, Shaha M, Hossain RM, Islam S, Iqbal S. SP313PREVALENCE OF CARDIO-RENAL RISK FACTORS IN URBAN & RURAL POPULATION - FINDINGS FROM A SCREENING PROGRAM IN BANGLADESH (BAN-CARE). Nephrol Dial Transplant 2018. [DOI: 10.1093/ndt/gfy104.sp313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
| | - M Iqbal
- Nephrology, SSMC, Dhaka, Bangladesh
| | - D Roy
- Nephrology, NIKDU, Dhaka, Bangladesh
| | - K Alam
- Nephrology, NIKDU, Dhaka, Bangladesh
| | - M Faroque
- Nephrology, BSMMU, Dhaka, Bangladesh
| | - M Shaha
- Nephrology, NIKDU, Dhaka, Bangladesh
| | | | - S Islam
- Nephrology, BSMMU, Dhaka, Bangladesh
| | - S Iqbal
- Nephrology, BIRDEM, Dhaka, Bangladesh
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Khanam A, Nessa A, Alam K, Nasreen S, Sultana R, Islam F, Tajkia T, Naznin R. Study on Hemoglobin Concentration in Patient with Chronic Kidney Disease. Mymensingh Med J 2018; 27:1-5. [PMID: 29459584] [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: 06/08/2023]
Abstract
In the present study hemoglobin concentration were estimated in chronic kidney diseased patient to observe the frequency of low hemoglobin level in chronic kidney diseased (CKD) patient and to assess the incidence of anaemia. This cross sectional study was carried out in the department of Physiology of Mymensingh Medical College, Mymensingh, Bangladesh from July 2014 to June 2015. For this purpose, total 200 subjects with age ranged from 25 to 60 years were selected and divided into100 healthy persons as control group and 100 CKD patients as study group. Both control and study group were further divided into 50 male and 50 female. Hemoglobin concentration was evaluated by the Cyanmethemoglobin (CMG) method. Statistical analysis of data was done by unpaired student's 't' test. The results showed that hemoglobin levels decreased significantly in chronic kidney diseased patients than the normal healthy persons. The decreasing frequency of hemoglobin level in CKD may predispose the patients to anemia and increasing the other complications.
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Affiliation(s)
- A Khanam
- Dr Aklima Khanam, Assistant Professor, City Medical College, Gazipur, Bangladesh
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Nasreen S, Nessa A, Islam F, Khanam A, Sultana R, Alam K, Naznin R, Tajkia T, Rahman R, Hossain M, Sultana MA, Kamal ST. Interaction between Hypertension and Asthma in Adult. Mymensingh Med J 2018; 27:34-40. [PMID: 29459589] [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: 06/08/2023]
Abstract
Asthma has been defined as a chronic inflammatory disorder of the airways that is associated with recruitment of inflammatory cells and the clinical development of wheezing, shortness of breath, chest tightness, and cough. The prevalence of asthma increased steadily over the latter part of the last century, first in the developed and then in the developing world. Current estimates suggest that asthma affects 300 million people worldwide, with a predicted additional 100 million people affected by 2025. This cross sectional study was conducted from January 1999 to August 1999 on 5642 Bangladeshi people and another same study carried out from November 2009 to April 2010 on 8088 subjects. In 1999 the prevalence of asthma was 6.9% whereas in 2010 it is 6.96%. Both asthma and hypertension are spastic disorders of smooth muscle, there is the similarities between these two diseases may predispose the individuals with one disease to the other. This descriptive type of cross-sectional study was done to find the Interaction between hypertension and asthma in adult and carried out in the Department of Physiology, Mymensingh Medical College, Mymensingh, Bangladesh from July 2014 to January 2016. Fifty (50) male and fifty (50) female adult asthmatic patients aged 18-60 years were included in the study group. They are enrolled from the Department of Medicine, Mymensingh Medical College, Mymensingh and also from locality. For comparison age matched 50 male and 50 female apparently healthy persons were also studied as control. Blood pressure was estimated by auscultatory method by sphygmomanometer. For statistical analysis unpaired student's 't' test was used. Mean blood pressure were significantly increased in study group in comparison to control group and the result was statistically significant (p<0.001). The study findings showed a high prevalence of hypertension among asthmatic patients than non asthmatic healthy persons. From this study, it may be concluded that hypertension and asthma are closely connected.
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Affiliation(s)
- S Nasreen
- Dr Shamima Nasreen, Assistant Professor, Department of Physiology, TMSS Medical College, Bogra, Bangladesh; E-mail:
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Ali M, Alam K, Al-Majali YTA, Kennedy M. Novel hybrid composite discharge electrode for electrostatic precipitator. J Air Waste Manag Assoc 2017; 67:1036-1045. [PMID: 28541833 DOI: 10.1080/10962247.2017.1334718] [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] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Revised: 05/08/2017] [Accepted: 05/09/2017] [Indexed: 06/07/2023]
Abstract
UNLABELLED Over the last few decades, electrostatic precipitators (ESPs) have emerged as effective air pollution control devices for treating coal-fired power plant exhausts. Among the components of the ESP, the discharge electrodes are extremely important in determining the collection efficiency of the ESP. Typically, in wet ESPs, the discharge electrodes used must be made of corrosion-resistant alloys, which makes them extremely expensive and heavy. Hybrid composite discharge electrodes have the potential to be lightweight and corrosion-resistant substitute for traditional metal alloy electrodes used in wet ESPs. In this experimental study, a novel hybrid composite electrode (recently patented at Ohio University) is presented as a substitute for traditional metal electrodes in wet ESPs. The samples of hybrid electrodes were fabricated by using carbon fiber composites, combined with metal mesh, in the shape of a long and thin tape. The electrode's electrical response was evaluated in open atmospheric conditions, while connected to a transformer-rectifier unit to generate a corona current at voltages exceeding 50 kV. Results of these hybrid electrodes were compared with traditional metal electrodes. The hybrid composite discharge electrode produced a uniform corona at comparable power levels to that of metal electrodes, with additional advantages of being compact, lightweight, and highly corrosion resistant. In addition, hybrid composite electrodes exhibited lower corona onset voltage as compared with metal electrodes. The preliminary experimental data are encouraging and show significant potential for this new inexpensive hybrid electrode to replace metal electrodes in wet ESPs, providing comparable (and in some cases exceeding) collection efficiencies with lower ozone generation. IMPLICATIONS The newly invented hybrid composite electrode (HCE) performance was evaluated through experimentation with conventional metal electrodes. The HCE performance was comparable to the metal electrodes. The HCE also exhibited uniform corona fields and steady power while maintaining similar and in some cases superior electrical performance as compared with metal electrodes and thus shows a significant potential to substitute metal electrodes in wet ESP systems.
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Affiliation(s)
- M Ali
- a Electrostatic Precipitator Laboratory, Department of Mechanical Engineering , Ohio University , Athens , OH , USA
| | - K Alam
- a Electrostatic Precipitator Laboratory, Department of Mechanical Engineering , Ohio University , Athens , OH , USA
| | - Y T A Al-Majali
- a Electrostatic Precipitator Laboratory, Department of Mechanical Engineering , Ohio University , Athens , OH , USA
| | - M Kennedy
- a Electrostatic Precipitator Laboratory, Department of Mechanical Engineering , Ohio University , Athens , OH , USA
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Salahin N, Alam K, Mondol ATMAI, Islam MS, Rashid MH, Hoque MA. Effect of Tillage and Residue Retention on Soil Properties and Crop Yields in Wheat-Mungbean-Rice Crop Rotation under Subtropical Humid Climate. ACTA ACUST UNITED AC 2017. [DOI: 10.4236/ojss.2017.71001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Ali M, Pasic H, Alam K, Tiji SAN, Mannella N, Silva T, Liu T. Experimental study of cross-flow wet electrostatic precipitator. J Air Waste Manag Assoc 2016; 66:1237-1244. [PMID: 27723417 DOI: 10.1080/10962247.2016.1209258] [Citation(s) in RCA: 2] [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: 03/23/2016] [Accepted: 06/17/2016] [Indexed: 06/06/2023]
Abstract
UNLABELLED This paper reports development and testing of a novel cross-flow wet electrostatic precipitator (WESP), recently patented at Ohio University, that utilizes vertical columns of permeable material in the form of polypropylene ropes placed in a cross-flow configuration within a flue gas stream. The cross-flow design has large surface area, which provides scrubbing action; therefore, it has the potential for removing multiple pollutants, including particulates, gases, vapors, and mists. In this new method, the ropes are kept wet by the liquid (water) introduced from the top of the cells running downward on the ropes by capillary action, making the permeable materials act as the ground electrode for capturing particles from the flue gas. Preliminary testing has shown an efficiency of well above 80% using two cells and three sets of discharge electrodes. Since the material of construction is primarily corrosion-resistant polymeric material, both weight and cost reductions are expected from this new design. IMPLICATIONS The newly invented cross-flow WESP exhibit particulate collection efficiency of well above 80% when introduced in particulate-laden exhaust flow. This value was obtained using a two cells and three discharge electrodes configuration. The electric field strength has a substantial effect on the collection efficiency. Also, the pressure drop test results indicate that there is a potential to increase the collection area, which, in turn, will increase the collection efficiency further.
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Affiliation(s)
- M Ali
- a Department of Mechanical Engineering , Ohio University , Athens , OH , USA
| | - H Pasic
- a Department of Mechanical Engineering , Ohio University , Athens , OH , USA
| | - K Alam
- a Department of Mechanical Engineering , Ohio University , Athens , OH , USA
| | - S A N Tiji
- a Department of Mechanical Engineering , Ohio University , Athens , OH , USA
| | - N Mannella
- a Department of Mechanical Engineering , Ohio University , Athens , OH , USA
| | - T Silva
- b The Babcock and Wilcox Company , Barberton , OH , USA
| | - T Liu
- b The Babcock and Wilcox Company , Barberton , OH , USA
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Abstract
BACKGROUND Drilling of bone is widely performed in orthopaedics for repair and reconstruction of bone. Current paper is focused on the efforts to minimize force generation during the drilling process. Ultrasonically Assisted Drilling (UAD) is a possible option to replace Conventional Drilling (CD) in bone surgical procedures. OBJECTIVE The purpose of this study was to investigate and analyze the effect of drilling parameters and ultrasonic parameters on the level of drilling thrust force in the presence of water irrigation. METHODS Drilling tests were performed on young bovine femoral bone using different parameters such as spindle speeds, feed rates, coolant flow rates, frequency and amplitudes of vibrations. RESULTS The drilling force was significantly dropped with increase in drill rotation speed in both types of drilling. Increase in feed rate was more influential in raising the drilling force in CD compared to UAD. The force was significantly dropped when ultrasonic vibrations up to 10 kHz were imposed on the drill. The drill force was found to be unaffected by the range of amplitudes and the amount of water supplied to the drilling region in UAD. CONCLUSIONS Low frequency vibrations with irrigation can be successfully used for safe and efficient drilling in bone.
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Affiliation(s)
- K Alam
- Department of Mechanical and Industrial Engineering, College of Engineering, Sultan Qaboos University, P.O. Box 33, Al-Khoud 123, Sultanate of Oman
| | - Edris Hassan
- Department of Mechanical and Industrial Engineering, College of Engineering, Sultan Qaboos University, P.O. Box 33, Al-Khoud 123, Sultanate of Oman
| | - Syed Husain Imran
- School of Mechanical and Manufacturing Engineering, National University of Sciences and Technology, Islamabad, 44000, Pakistan
| | - Mushtaq Khan
- School of Mechanical and Manufacturing Engineering, National University of Sciences and Technology, Islamabad, 44000, Pakistan
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Abu El Asrar A, De Hertogh G, van den Eynde K, Alam K, Van Raemdonck K, Opdenakker G, Van Damme J, Geboes K, Struyf S. Myofibroblasts in proliferative diabetic retinopathy can originate from infiltrating fibrocytes and through endothelial-to-mesenchymal transition (EndoMT). Acta Ophthalmol 2015. [DOI: 10.1111/j.1755-3768.2015.1290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- A. Abu El Asrar
- Ophthalmology; King Abdulaziz University Hospital; Riyadh Saudi Arabia
| | - G. De Hertogh
- Laboratory of Histochemistry and Cytochemistry; University of Leuven; Leuven Belgium
| | - K. van den Eynde
- Laboratory of Histochemistry and Cytochemistry; University of Leuven; Leuven Belgium
| | - K. Alam
- Ophthalmology; King Saud University; Riyadh Saudi Arabia
| | - K. Van Raemdonck
- Department of Microbiology and Immunology; Rega Institute for Medical Research; University of Leuven; Leuven Belgium
| | - G. Opdenakker
- Department of Microbiology and Immunology; Rega Institute for Medical Research; University of Leuven; Leuven Belgium
| | - J. Van Damme
- Department of Microbiology and Immunology; Rega Institute for Medical Research; University of Leuven; Leuven Belgium
| | - K. Geboes
- Laboratory of Histochemistry and Cytochemistry; University of Leuven; Leuven Belgium
| | - S. Struyf
- Department of Microbiology and Immunology; Rega Institute for Medical Research; University of Leuven; Leuven Belgium
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Abu El Asrar A, De Hertogh G, van den Eynde K, Alam K, Van Raemdonck K, Opdenakker G, Van Damme J, Geboes K, Struyf S. Myofibroblasts in proliferative diabetic retinopathy can originate from infiltrating fibrocytes and through endothelial-to-mesenchymal transition (EndoMT). Acta Ophthalmol 2015. [DOI: 10.1111/j.1755-3768.2015.0290] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- A. Abu El Asrar
- Ophthalmology; King Abdulaziz University Hospital; Riyadh Saudi Arabia
| | - G. De Hertogh
- Laboratory of Histochemistry and Cytochemistry; University of Leuven; Leuven Belgium
| | - K. van den Eynde
- Laboratory of Histochemistry and Cytochemistry; University of Leuven; Leuven Belgium
| | - K. Alam
- Ophthalmology; King Saud University; Riyadh Saudi Arabia
| | - K. Van Raemdonck
- Deparment of Microbiology and Immunology; Rega Institute for Medical Research; University of Leuven; Leuven Belgium
| | - G. Opdenakker
- Deparment of Microbiology and Immunology; Rega Institute for Medical Research; University of Leuven; Leuven Belgium
| | - J. Van Damme
- Deparment of Microbiology and Immunology; Rega Institute for Medical Research; University of Leuven; Leuven Belgium
| | - K. Geboes
- Laboratory of Histochemistry and Cytochemistry; University of Leuven; Leuven Belgium
| | - S. Struyf
- Deparment of Microbiology and Immunology; Rega Institute for Medical Research; University of Leuven; Leuven Belgium
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Banday M, Alam K, Mir M. P0098 Association of special dietary habits with aberrant methylation of p16, E-cadherin, and hMLH1 genes in gastric carcinoma in Kashmir valley, India. Eur J Cancer 2015. [DOI: 10.1016/j.ejca.2015.06.059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Anderson S, Daly G, O'Sullivan C, Subish P, MI MI, Mishra P, Alam K, Poudel A, Khanal S, Norris R, Lee SG, Galbraith K, Kong DCM. Letters to the Editor. Journal of Pharmacy Practice and Research 2015. [DOI: 10.1002/j.2055-2335.2008.tb00400.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | | | | | - P Subish
- Department of Hospital and Clinical Pharmacy/Pharmacology, Manipal Teaching Hospital/Manipal College of Medical Sciences
| | - Mohamed Izham MI
- Discipline of Social and Administrative Pharmacy, School of Pharmaceutical Sciences; Universiti Sains Malaysia
| | - P Mishra
- Department of Hospital and Clinical Pharmacy/Pharmacology
| | - K Alam
- Department of Hospital and Clinical Pharmacy/Pharmacology
| | - A Poudel
- Department of Hospital and Clinical Pharmacy, Manipal Teaching Hospital/Manipal College of Medical Sciences; Pokhara Nepal
| | - S Khanal
- Department of Hospital and Clinical Pharmacy, Manipal Teaching Hospital/Manipal College of Medical Sciences; Pokhara Nepal
| | - Ross Norris
- Australian Centre for Paediatric Pharmacokinetics & Therapeutic Advisory Service, Mater Pharmacy Services; South Brisbane Qld 4101
| | - Su-Gil Lee
- Occupational Hygienist & Laboratory Manager OEH Consulting, Discipline of Public Health School of Population Health & Clinical Practice; University of Adelaide; Thebarton SA 5031
| | - Kirstie Galbraith
- Department of Pharmacy Practice; Monash University, and Senior Pharmacist, Research and Education, Royal Melbourne Hospital; Parkville Vic. 3050
| | - David CM Kong
- Department of Pharmacy Practice, Centre for Medicine Use and Safety, Faculty of Pharmacy and Pharmaceutical Sciences; Monash University; Parkville Vic. 3052
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Alam K, Silberschmidt VV. Analysis of temperature in conventional and ultrasonically-assisted drilling of cortical bone with infrared thermography. Technol Health Care 2015; 22:243-52. [PMID: 24837054 DOI: 10.3233/thc-140813] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Bone drilling is widely used in orthopaedics, dental and neurosurgeries for repair and fixation purposes. One of the major concerns in drilling of bone is thermal necrosis that may seriously affect healing at interfaces with fixtures and implants. Ultrasonically-assisted drilling (UAD) is recently introduced as alternative to conventional drilling (CD) to minimize invasiveness of the procedure. OBJECTIVE This paper studies temperature rise in bovine cortical bone drilled with CD and UAD techniques and their comparison using infrared thermography. METHODS A parametric investigation was carried out to evaluate effects of drilling conditions (drilling speed and feed rate) and parameters of ultrasonic vibration (frequency and amplitude) on the temperature elevation in bone. RESULTS Higher levels of the drilling speed and feed rate were found responsible for generating temperatures above a thermal threshold level in both types of drilling. UAD with frequency below 20 kHz resulted in lower temperature compared to CD with the same drilling parameters. The temperatures generated in cases with vibration frequency exceeding 20 kHz were significantly higher than those in CD for the range of drilling speeds and feed rates. The amplitude of vibration was found to have no significant effect on bone temperature. CONCLUSIONS UAD may be investigated further to explore its benefits over the existing CD techniques.
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Affiliation(s)
- K Alam
- Department of Mechanical and Industrial Engineering, College of Engineering, Sultan Qaboos University, Al-Khoud, Sultanate of Oman
| | - Vadim V Silberschmidt
- Wolfson School of Mechanical and Manufacturing Engineering, Loughborough University, Loughborough, Leicestershire, UK
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Abstract
BACKGROUND Bone cutting is a well-known surgical procedure in orthopaedics and dentistry for fracture treatment and reconstruction. Common complications associated with the process are mechanical damage linked with excessive levels of penetration force. Larger forces may produce minor cracks in bone which may seriously affect strength of fixation and may delay the healing process. OBJECTIVE This paper investigates cracking behavior in the microstructure of cortical bone in cutting using experimental and numerical techniques. METHODS Experiments were performed on cortical bone to study the mechanics of crack propagation and evaluate the extent of crack with the drilling force and amount of penetration. Finite element (FE) simulations were performed to visualize the extension and arrest of the cracks in bone microstructure. RESULTS The length of crack was found to be strongly influenced by the drilling force and amount of drill penetration. Osteon were seen to deflect the cracks at their boundaries. Crack propagation in bone microstructure was observed to depend on anatomical direction. Numerical simulations predicted the direction of crack propagation and found osteon boundaries to act as barrier to the cracks. CONCLUSIONS Lower drilling force may be used in cutting the bone to avoid cracks in the bone tissue. A detailed FE model based on fracture data of cortical bone is to be produced to simulate cracking of bone microstructure.
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Affiliation(s)
- K Alam
- Department of Mechanical and Industrial Engineering, College of Engineering, Sultan Qaboos University, P.O. Box 33, Al-Khoud 123, Sultanate of Oman. Tel.: +968 24143751; Fax: +968 24141316; E-mail:
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Abstract
BACKGROUND Bone drilling is a well-known surgical procedure in orthopaedics and dentistry for fracture treatment and reconstruction. Advanced understanding of the mechanics of the drill-bone interaction is necessary to overcome challenges associated with the process and related postoperative complications. OBJECTIVE The aim of this study was to explore the benefits of a novel drilling technique, ultrasonically-assisted drilling (UAD), and its possible utilization in orthopaedic surgeries. METHODS The study was performed by conducting experiments to understand the basic mechanics of the drilling process using high speed filming of the drilling zone followed by measurements to quantify thrust force, surface roughness and cracking of the bone near the immediate vicinity of the hole with and without ultrasonic assistance. RESULTS Compared to the spiral chips produced during conventional drilling (CD), UAD was found to break the chips in small pieces which facilitated their fast evacuation from the cutting region. In UAD, lower drilling force and better surface roughness was measured in drilling in the radial and longitudinal axis of the bone. UAD produced crack-free holes which will enhance postoperative performance of fixative devices anchoring the bone. CONCLUSIONS UAD may be used as a possible substitute for CD in orthopaedic clinics.
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Affiliation(s)
- K Alam
- Department of Mechanical and Industrial Engineering, College of Engineering, Sultan Qaboos University, Sultanate of Oman
| | - Naseer Ahmed
- Department of Mechanical Engineering, College of Engineering, Taibah University, Al Madina Al Munawara, Kingdom of Saudi Arabia
| | - V V Silberschmidt
- Wolfson School of Mechanical and Manufacturing Engineering, Loughborough University, Loughborough, Leicestershire, UK
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Ahmad S, Moinuddin, Shahab U, Habib S, Salman Khan M, Alam K, Ali A. Glycoxidative damage to human DNA: Neo-antigenic epitopes on DNA molecule could be a possible reason for autoimmune response in type 1 diabetes. Glycobiology 2013; 24:281-91. [DOI: 10.1093/glycob/cwt109] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
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Abstract
The aims of pharmacovigilance are early recognition of previously unknown adverse drug reactions (ADRs), recognition of changes in frequency of known ADRs, identification of risk factors and mechanism of ADRs, quantitative analysis of benefit/risk ratio and dissemination of safety information for rational drug prescribing and regulation. The pharmacovigilance programme in Nepal is a recent development. The Department of Drug Administration (DDA) took the initiative to set up a pharmacovigilance program in 2002; however, it was initiated systematically only after two years. DDA acts as the National Pharmacovigilance Centre (NPC). It collects ADR case reports from the Regional Pharmacovigilance Centre (RPC). Currently there are six RPCs operating in the country. The current reporting trends suggest high under-reporting of suspected ADRs. This paper is a review of those studies which are focused on pharmacovigilance and healthcare professionals’ perspectives on ADR reporting in Nepal. It also recommends the possible ways to improve the ADR reporting based on the context of Nepal.DOI: http://dx.doi.org/10.3126/nje.v3i1.8286 Nepal Journal of Epidemiology 2013;3 (1): 230-235
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Alam K, Chakraborty T, Pramanik (Chaudhury) S, Sarddar D, Mal S. Measurement of Power Frequency with Higher Accuracy Using PIC Microcontroller. Procedia Technology 2013; 10:849-855. [DOI: 10.1016/j.protcy.2013.12.430] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/19/2023]
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Alam K, Mishra P, Angsulee N. Appropriateness of Antibiotic Use in Enteric Fever In-patients of Two Tertiary Care Hospitals in Western Nepal: A Cross-sectional Study. Res Social Adm Pharm 2012. [DOI: 10.1016/j.sapharm.2012.08.151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Kiatying-Angsulee N, Chai M, Alam K, Arparsrithongsagul S. Antimicrobial Resistance and Rational Use of Antibiotics. Res Social Adm Pharm 2012. [DOI: 10.1016/j.sapharm.2012.08.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Khan MA, Dixit K, Uddin M, Malik A, Alam K. Role of peroxynitrite-modified H2A histone in the induction and progression of rheumatoid arthritis. Scand J Rheumatol 2012; 41:426-33. [DOI: 10.3109/03009742.2012.698300] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Shankar PR, Subish P, Alam K. A research methodology workshop on ‘Social issues in use of medicines’ – cooperation between institutions and participant feedback. J Coll Med Sci-Nepal 2012. [DOI: 10.3126/jcmsn.v8i1.6829] [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: 11/18/2022] Open
Abstract
A research methodology workshop on social issues in use of medicines was conducted at Pokhara, Nepal from December 21st to 24th, 2008. The present study was conducted to obtain detailed participant feedback about the workshop and obtain suggestions for improvement. The participants’ knowledge was assessed at the start of the workshop and on the final day by noting their agreement with a set of 40 statements using a modified Likert-type scale. The areas of qualitative research, statistics, research methodology, drug use, pharmacovigilance, journal and general were covered. Certain statements were negative and their scores were reversed. The total score was calculated. The median total scores were compared among various subgroups of respondents. Session evaluation was done at the end of each session. A total of twenty-five participants attended the sessions. The workshop significantly improved the median total scores. Significant improvements were also seen in the subcategories Statistics and Journal. The scores of certain statements were low. The evaluation scores of certain sessions were low. The overall participant opinion about the workshop was positive. Occasional problems with accent of the facilitator and lack of internet access were major problems noted. Some participants felt the workshop was too hectic. Journal of College of Medical Sciences-Nepal,2012,Vol-8,No-1, 60-67 DOI: http://dx.doi.org/10.3126/jcmsn.v8i1.6829
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Cornejo S, Heilala M, McVinnie D, Suiter P, Schwartz S, Alam K. Abstract No. 437: Management of IVC filter related vena cava thrombosis. J Vasc Interv Radiol 2012. [DOI: 10.1016/j.jvir.2012.01.034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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Alam K, Tasneem S, Oliveras E. Retention of female volunteer community health workers in Dhaka urban slums: a case-control study. Health Policy Plan 2011; 27:477-86. [DOI: 10.1093/heapol/czr059] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Alam K, Mitrofanov A, Silberschmidt V. Experimental investigations of forces and torque in conventional and ultrasonically-assisted drilling of cortical bone. Med Eng Phys 2011; 33:234-9. [DOI: 10.1016/j.medengphy.2010.10.003] [Citation(s) in RCA: 140] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2009] [Revised: 09/24/2010] [Accepted: 10/05/2010] [Indexed: 11/29/2022]
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Abstract
A 81-year-old man presented with a 2-month history of swelling of the right angle of the jaw. On histopathological examination a diagnosis of Warthin's tumour with coexistent tuberculosis of the parotid gland was made. PCR for tuberculosis was positive. Tuberculosis of the parotid gland is very rare and coexistence with Warthin's tumour is extremely rare. This case is being reported for its rarity.
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Affiliation(s)
- V Maheshwari
- Department of Pathology, J N Medical College, Aligarh Muslim University, Aligarh, Uttar Pradesh, India
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Wallack MK, Berenji M, Alam K, Bartolucci AA. Ten-year analysis of vaccinia melanoma oncolysate (VMO) phase III trial. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e19031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Alam K, Mitrofanov A, Silberschmidt V. Thermal analysis of orthogonal cutting of cortical bone using finite element simulations. ACTA ACUST UNITED AC 2010. [DOI: 10.1504/ijecb.2010.035259] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Alam K, Nader K, Strouhal P. To assess image count density on skeletal scintigraphy with SPECT. Cancer Imaging 2010. [DOI: 10.1102/1470-7330.2010.9069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Nader K, Alam K, Strouhal P. A quality comparison study between two post processing algorithms for bone SPECT images. Cancer Imaging 2010. [DOI: 10.1102/1470-7330.2010.9071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Zaman F, Alam K, Buchholz N, Masood J. The UK nephrostomy audit. Can a voluntary registry produce robust performance data? Clin Radiol 2009; 64:847-8; author reply 848-9. [PMID: 19589426 DOI: 10.1016/j.crad.2009.04.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2009] [Revised: 04/01/2009] [Accepted: 04/22/2009] [Indexed: 11/15/2022]
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Alam K, Mitrofanov A, Silberschmidt V. Measurements of Surface Roughness in Conventional and Ultrasonically Assisted Bone Drilling. ACTA ACUST UNITED AC 2009. [DOI: 10.5099/aj090400312] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Abstract
The efforts of modern civilization to create an environment to meet human aspirations have successfully resulted in constant improvements of our lifestyle, but it has increased risks to human and ecological health. This situation has motivated many scientists throughout the world to analyze the environmental factors that can affect our health or ecology and to calculate the levels of risk. In Bangladesh development activities and utilization of the river pose a great threat to the health of the existing natural environmental system, particularly for the important river Buriganga of the capital city, Dhaka, due to the pollution of the river water. A study was carried out to observe the ecological health hazards of the Buriganga river and their risk to human health. Several random samples of water were collected from different spots on the river from September to December 2006. The samples were analyzed to determine water quality and associated environmental health risks. The study revealed that the water is high in biological oxygen demand (BOD), chemical oxygen demand (COD), phosphate (PO4 -3), ammonia, organic matters and nutrients, etc. It also revealed huge environmental health risks and possible ecological disruption of this river. Finally, the research recommends a sustainable policy framework on how the pollution could significantly be reduced by using different appropriate measures. Key words: Environmental health risk, ecological disruption, sustainable policy, water quality, Buriganga river, Bangladesh doi: 10.3126/hn.v3i0.1915 Hydro Nepal:Journal of Water, Energy and Environment Issue No. 3, July 2008. Page: 25-28
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Khan MA, Dixit K, Jabeen S, Moinuddin, Alam K. Impact of Peroxynitrite Modification on Structure and Immunogenicity of H2A Histone. Scand J Immunol 2009; 69:99-109. [DOI: 10.1111/j.1365-3083.2008.02200.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Alam K, Agua T, Maven H, Taie R, Rao KS, Burrows I, Huber ME, Rali T. Preliminary Screening of Seaweeds, Seagrass and Lemongrass Oil from Papua New Guinea for Antimicrobial and Antifungal Activity. ACTA ACUST UNITED AC 2008. [DOI: 10.3109/13880209409083022] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- K. Alam
- Departments of Chemistry and Biology, Papua, New Guinea
| | - T. Agua
- Departments of Chemistry and Biology, Papua, New Guinea
| | - H. Maven
- Departments of Chemistry and Biology, Papua, New Guinea
| | - R. Taie
- Departments of Chemistry and Biology, Papua, New Guinea
| | - K. S. Rao
- Departments of Chemistry and Biology, Papua, New Guinea
| | - I. Burrows
- University of Papua New Guinea, P.O. Box 320, Papua, New Guinea
| | - M. E. Huber
- University of Papua New Guinea, P.O. Box 320, Papua, New Guinea
| | - T. Rali
- Departments of Chemistry and Biology, Papua, New Guinea
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