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Physico-Chemical and Microbiological Quality Assessment of Supply Water around Dhaka City, Bangladesh

Journal of Water Resource and Protection 2019年第3期11卷 280-295页

作者： md. Shamimuzzaman Rashed Hasan Nayeem Nargis Ara md. Masuder Rahman md. iqbal kabir jahid md. Nazmul Hasan Department of Microbiology Faculty of Biological Science and Technology Jessore University of Science and Technology Jessore Bangladesh Biotechnology and Genetic Engineering Discipline School of Life Sciences Khulna University Khulna Bangladesh Department of Pharmacy University of Development Alternative Dhaka Bangladesh Department of Biotechnology and Genetic Engineering Mawlana Bhashani Science and Technology University Tangail Bangladesh Department of Genetic Engineering and Biotechnology Faculty of Biological Science and Technology Jessore University of Science and Technology Jessore Bangladesh

Dhaka is one of the most densely-populated megacities in the world. Water supply problem is acute in this city, but the quality of drinking water has tremendous importance as potability. This study was aimed at comparing various physicochemical and microbiological parameters which are very much relevant for the drinking water quality of Dhaka city of Bangladesh. A total of 80 samples from 11 collection point of different places were collected over ten months. After that, the samples were examined by a different measuring device for physicochemical parameter testing. Considering physicochemical parameters, all water samples were within the limit for pH. However, 53.75% water had unsatisfactory for chlorine level. Total Dissolve Solid (TDS), hardness, iron, and alkalinity based unsatisfactory were 28.75%, 15.0%, 8.75%, and 3.75% respectively. Five parameters had taken into consideration to measure the microbiological quality. The cultural and biochemical methods showed that 80 water samples have a different range of contamination. The total aerobic count was unsatisfactory for 53.75% samples. Sixty-one samples were found coliform contaminated that is 76.25% of the total samples and 58.75% sample was carried fecal substances. E. coli and Vibrio was unsatisfactory as 61.25% and13.75% respectively. This study revealed that how much safe is supplied water of a municipal water supplier.

关键词： Water Quality Microbial Assay Coliform Fecal Coliform Chlorination Potability Physicochemical Properties of Water Pathogen

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Nipah Virus Unveiled: A Review Article

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Advances in Bioscience and Biotechnology 2024年第3期15卷 161-173页

作者： Munama Magdum md. Abir Tazim Chowdhury Mahmuda Khandaker Razdip Datta md. Naheed Rayhan md. Siffat Uddin md. Junayed Imam Bhuiyan md. Ahaduzzaman md. Abdullah Al-Mahammud kabir Mohammad Zishan Uddin md. Estiak Ullah Sahid Subrata Saha Department of Community Medicine Shaheed Monsur Ali Medical College Dhaka Bangladesh Department of Cardiothoracic and Vascular Surgery Evercare Hospital Dhaka Bangladesh Department of Microbiology Shaheed Monsur Ali Medical College Dhaka Bangladesh Department of Anesthesia Dhaka Dental College & Hospital Dhaka Bangladesh Department of Cardiothoracic Anesthesia Evercare Hospital Dhaka Bangladesh Department of Medicine Times Multicare Hospital Ltd. Dhaka Bangladesh Barking Havering and Redbridge University Hospitals NHS Trust Romford UK

Nipah virus (NiV) is a highly infectious zoonotic pathogen that poses a significant threat to human and animal health. First identified in Malaysia in 1998, NiV has since caused several outbreaks in Southeast Asia, with sporadic cases reported in Bangladesh and India. The virus is primarily transmitted to humans through direct contact with infected animals, primarily fruit bats, or through the consumption of contaminated fruits and their juices. NiV infection presents a wide spectrum of clinical features, ranging from mild respiratory illness to severe encephalitis, with a high case fatality rate. The incubation period typically ranges from 4 to 14 days, during which patients develop fever, headache, myalgia, and respiratory symptoms such as cough and sore throat. As the disease progresses, neurological signs become prominent, including altered consciousness, seizures, and focal deficits. Severe cases may exhibit acute respiratory distress syndrome and multi organ failure. Laboratory findings often include lymphocytopenia, thrombocytopenia, and elevated liver enzymes. Diagnosis of NiV infection requires specialized laboratory testing, including reverse transcription-polymerase chain reaction (RT-PCR) and serological assays. Currently, no specific antiviral treatment exists for NiV infection, and management primarily focuses on supportive care. Prevention and control strategies encompass public health interventions, surveillance, and raising awareness among healthcare providers and the general population. The emergence and re-emergence of NiV highlight the urgent need for continued research, improved diagnostic capabilities, and the development of effective vaccines and therapeutics to mitigate the impact of this deadly virus.

关键词： Nipah Virus Zoonotic Pathogen Outbreaks Surveillance

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Structural Style and Hydrocarbon Prospectivity of the Growth Faults Related Structures in the Bengal Basin

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Journal of Geoscience and Environment Protection 2024年第8期12卷 197-218页

作者： md. Fazle Rabbi Joy md. Mostafizur Rahman S. M. Mainul kabir Tamanna Binte Arfan Farhad Hsossain Department of Geology University of Dhaka Dhaka Bangladesh

The structural and tectonic evolution of the Bengal Basin is characterized by a complex interplay of factors, including sedimentation, the rise of the Himalayan Mountains, and the movements of Jurassic syn-rift faults. This study aims to comprehend the progression of growth faults inside the basin by examining fault geometry, basin development, and structural relief patterns. We used high-quality 2D seismic lines from the PK-MY-8403, classical seismic interpretation techniques and modeling were carried out to reveal the plate tectonic conditions, stratigraphy, and sedimentation history of the basin. The break-up unconformity, Paleocene and Eocene submerged conditions, and crucial geological formations including the Sylhet Limestone, Barail Group, and Surma Group were among the notable features recognized in seismic section. With an emphasis on growth strata and pre-growth strata, significant variations in layer thickness and relief were remarked in different stratigraphic levels. Basin development events like the evolution of the Miocene remnant ocean basin, sedimentation in Oligocene, Eocene Himalayan collision, and the Pliocene reverse fault development are analyzed. In the early the Pliocene compressional forces outpaced sedimentation rates and syn-depositional normal faults of Oligocene time began to move in opposite direction. Syn-depositional growth faults may have formed in the Bengal Basin as a result of this reversal. This research provides a detailed comprehensive knowledge of growth fault development in the Bengal Basin following the seismic interpretation, modelling, and thickness/relief analysis. The outcomes point to a substantial hydrocarbon potential, especially in regions like the Eocene Hinge Zone, where the prospectivity of the area is enhanced by carbonate reefs and Jalangi shale. However, the existence of petroleum four-way closure in the investigated region requires further investigation.

关键词： Plate Tectonic Subsidence History Structural Relief Syn-Depositional Model Growth Fault Petroleum System

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Multi-species probiotics enhance survival,growth,intestinal microbiota and disease resistance of rohu(Labeo rohita)larvae

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Water Biology and Security 2024年第1期3卷 71-79页

作者： Zannatul Ferdous md.kabir Hossain md.Hadiuzzaman SMRafiquzzaman KM Abdul Halim Tanvir Rahman md.Ali Reza Faruk Zulhisyam Abdul Kari md.Shahjahan Laboratory of Fish Ecophysiology Department of Fisheries ManagementBangladesh Agricultural UniversityMymensingh2202Bangladesh Department of Aquaculture Bangladesh Agricultural UniversityMymensingh2202Bangladesh Department of Fisheries Matshoy BhabanDhakaBangladesh Department of Fisheries Biology&Aquatic Environment Bangabandhu Sheikh Mujibur Rahman Agricultural UniversityGazipur1706Bangladesh Department of Agricultural Sciences Faculty of Agro-Based IndustryUniversiti Malaysia KelantanJeli Campus17600JeliKelantanMalaysia

Multi-strain probiotics provide the most dependable approaches to improve health,immune response,and disease resistance in farmed *** the present study,we examined the effects of multi-species probiotics on the survival,growth,immune response,and disease resistance of rohu(Labeo rohita)*** hatched larvae from the day of first feeding(average weight of 0.003 g)were reared with multi-species probiotics having a combination of Bacillus subtilis(109 colony forming units(cfu)/mL)and Lactobacillus spp.(Lactobacillus plantarum,Lactobacillus buchneri-1011 cfu/mL)in water containing doses of 0(control-C),0.5 mL/L(treatment 1-T1),and 1.0 mL/L(treatment 2-T2)in triplicates for 90 *** the experiment,a challenge test was performed to assess the fish's resistance to pathogenic Aeromonas *** higher survival was recorded in larvae of treated groups(87%in T2 and 79%in T1)compared to the control(62%).Significantly higher growth performance(weight gain and specific growth rate—SGR)was shown by the probiotic-treated larval groups compared to the *** supplementation resulted in significantly higher counts of total viable colony(TVC)and lactic acid bacteria(LAB)in the *** immunological parameters(mucosal fold fattening,goblet cell abundance,expansion of lamina propria and enterocytes)of the gut were significantly better in probiotic-treated *** liver of treated fish showed irregular shape nuclei turning into regular shape and reducing spaces between the hepatic ***-treated fish had the highest post-challenge survival rate(90%)against *** *** erythrocytes of challenged fish treated with probiotics had significantly lower frequencies of various nuclear and cellular *** findings suggest that multi-species probiotic supplements could improve the survival,growth,health status,and immune response of rohu in the early stages of its development.

关键词： Aquaculture Disease resistance Immunity Labeo rohita Probiotics

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Pattern of Eye Diseases among Tea Workers

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Open Journal of Ophthalmology 2024年第2期14卷 117-127页

作者： Rifat Binth Rezayee md. Showkat kabir Mohammed Moinul Hoque Nirupam Chowdhury Mohammad Shish Rahman Nawreen Binte Anwar Shah-Noor Hassan Department of Community Ophthalmology Bangabandhu Sheikh Mujib Medical University Dhaka Bangladesh Department of Ophthalmology Bangabandhu Sheikh Mujib Medical University Dhaka Bangladesh

Background: Bangladesh’s tea industry is essential to the country’s economic expansion. Since tea workers in Bangladesh are marginalized within our community, they have limited access to comprehensive eye care services. Productivity and well-being are cornerstones of comprehensive health care strategy. Ocular disorders are influenced by life expectancy, sociodemographic status, and the epidemiological transition. In this context, the state of ocular health and the many eye illnesses remain to be significantly addressed. Purpose: To evaluate the pattern of eye diseases among tea workers in a tea estate of Bangladesh. Methods: This cross-sectional observational study was carried out in Halda Valley Tea Estate, Nazirhat, Fatickchari, Chattogram, Bangladesh, under the supervision of the Department of Community Ophthalmology, BSMMU, following ethical clearance and approval by the IRB board of BSMMU. With informed written consent and approval from the authority of the tea estate, a total of 110 tea workers were recruited. Socio-demographic characteristics, ocular findings, and patterns of eye diseases were determined and recorded. Results: The mean age of the study participants was 39.60 ± 11.63 years. The maximum (58.1%) study participants were 31 - 50 years old, female (64.5%), illiterate (82.7%), and tribal (71.8%) indigenes. Eye diseases were found in 94.5% of workers. Presbyopia (28.2%), cataracts (27.3%), and refractive error (26.4%) were the most common. Tea workers with eye diseases were significantly older than those who did not have any eye diseases (40.20 ± 11.57 vs. 29.17 ± 7.31 years, p Conclusion: A significant number of tea workers had eye diseases, of which presbyopia, cataracts, and refractive error were the most common.

关键词： Tea Workers Eye Diseases Presbyopia Cataract Refractive Errors

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Comparative Antibiotic Sensitivity Pattern of Hospital and Community Acquired <i>Staphylococcus aureus</i>Isolates of Jessore, Bangladesh

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Journal of Biosciences and Medicines 2015年第10期3卷 17-23页

作者： Pravas Chandra Roy md. Shaheduzzaman Nigarin Sultana iqbal kabir jahid Department of Microbiology Jessore University of Science and Technology Jessore Bangladesh

Staphylococcus aureus has emerged over the past several decades as a leading cause of hospital acquired infections, which are more commonly termed as nosocomial infections. In recent years, strains of this bacterium which are resistant against several types of antibiotics have evolved and their prevalence is becoming a potential epidemiological threat. As there are limited data available on antibiotic resistance patterns of S. aureus that are isolated from hospital, the study was undertaken. The study was conducted by collecting swab samples from the hospital environment & volunteers and then identified them by standard methods. In case of hospital isolates, highest percentage of resistance was shown against Erythromycin (88.89%) and Ampicillin (83.33%). Significant resistance was also observed in cases of Ciprofloxacin (33.33%) and Tetracycline (33.33%). Lowest percentage of resistance was shown against Streptomycin (11.11%) and Vancomycin shows only intermediate resistant pattern (11.11%). On the other hand, community isolates were 100% sensitive against four antibiotics except Ampicillin (60% resistant) and Vancomycin (20% resistant). From the result it is easily discernable that, there are significant differences in the resistance pattern among hospital environment isolates and community acquired isolates. Samples were collected from different locations of hospital surgery room e.g. floor, wall, operating bed, trolley, sitting tool, cabinet etc. As anticipated, highest number of isolates showing resistance against these antibiotics were from the tool used for sitting.

关键词： Staphylococcus aureus Nosocomial Infection Antibiotic Resistant

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Temperature Effect on Stabilizing TiO2/Ag Composite Nanoparticles on Polyester Fabric for the Enhancement of Antibacterial Durability

Temperature Effect on Stabilizing TiO2/Ag Composite Nanopart...

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作者： Shawon md. Rashidul kabir 浙江理工大学

学位级别：硕士

Metal nanoparticles（MNPs）are recognized as a class of antimicrobial reagent for textile ***,their weak adhesion on polymeric fibers will cause unwanted loss of MNPs,resulting in an unsatisfied antibacterial durability,and even serious impact on the environment and human *** enhance the stability of the MNPs immobilized on fabrics,several approaches have been investigated by the other researchers so far,but achievement of stable immobilization and antibacterial durability still remain *** such as Cu,Fe,Ag,TiO2,Zn,and Ag are highly used in the textile sector for antibacterial *** these NPs have poor washing durability without ***,we propose a heating process for stabilizing TiO2 and Ag NPs on a plasma-treated polyester fabric without using any *** fabric was fabricated by dipping in solution followed by one step heat pressing and reduction using sodium *** polyester fabric is functionalized using cold plasma treatment for enhancing the adhesion and stabilizing of Titanium and Silver Nano *** process was repeated until the significant amounts of the TiO2-Ag NPs were *** temperature effect on the immobilization of the inorganic particles was *** surface morphology of the coated fabric samples was analyzed using Field Emission Scanning Electron Microscope,as well as the elemental analysis was achieved using X-ray powder diffraction,Fourier-transform infrared spectroscopy *** results showed that the surface of the fabric after plasma modification,the fiber surface was highly loaded with Ag-TiO2 *** adhesion and fixation of the NPs were significantly improved the increasing the *** higher temperature range showed higher fixation of the NPs inside the *** found that the heating process could endow the finishing fabric with superior antibacterial ability and durability when the temperature was higher than 150℃,as the bacterial reduction

关键词： OxygenPlasma heat-press antibacterial performance washingdurability nanoparticles

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Influence of Electrolytes on the Micellar Growth of Amphiphilic Drug Chlorpromazine Hydrochloride

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物理化学学报 2008年第3期24卷 411-415页

作者： ALAM md. Sayem kabir-UD-DIN Department of Chemistry Aligarh Muslim University Aligarh-202002 UP India

The effect of electrolytes on the micellar behavior of an amphiphilic drug, chlorpromazine (CPZ) hydrochloride, was studied using cloud point (CP) and dye solubilization techniques. In the presence of KBr, increase in pH led to decrease in the CP of 50 mmol·L-1 drug solution (prepared in 10 mmol·L-1 sodium phosphate (SP) buffer) because of deprotonation of drug molecules at high pH. The visible absorbance increased (due to dye solubilization) with the increase in pH from 6.5 to 6.9, which indicated micellar growth. At fixed pH (6.7), addition of inorganic salts (KF, KCl, and KBr) to drug solutions (50 mmol·L-1) caused an increase in the CP as well as in the visible absorbance, with effectiveness being in the order: F-Na+ >K+, which was explained by considering cognizance of their hydrated radii. Compared with anions, their effect was small. Increase in [CPZ] caused micellar growth and hence the CP as well as the visible absorbance increased. The overall behavior was discussed in terms of electrostatic interactions and micellar growth.

关键词：电解质胶束生长两性分子药物氯丙嗪氯化氢浊点染色增溶作用

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Molecular methods for detection of pathogenic viruses of respiratory tract——A review

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Asian Pacific Journal of Tropical Biomedicine 2018年第5期8卷 237-244页

作者： md.Shahidul kabir Department of Microbiology Institutional Quality Assurance Cell Stamford University

Human respiratory system is harbored by a vast array of transient and normal microbial flora.A number of pathogenic viruses were diagnosed from samples in different occasions from mild to severe infections of respiratory *** methods were developed for detection of these viruses during last two *** acid amplification methods were introduced for rapid and accurate diagnosis of pathogenic *** detection systems were employed to identify a panel of pathogenic viruses,which requires specialized kits and instruments in some *** review summarizes different types of molecular approaches which were developed with time and applied for the detection of pathogenic viruses associated with infections of the respiratory system.

关键词： Respiratory system Virus Molecular method Detection

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Investigating the Prospect of Small-Scale Wind Turbines Based on Regional Wind Velocities in Bangladesh

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Journal of Power and Energy Engineering 2022年第10期10卷 13-42页

作者： md. Sabbir Alam Sabbir Hossain md. jahid Hasan Mahajabin Binte Mohsin Department of Mathematics Jahangirnagar University Savar Dhaka

The wind turbine has the advantage of operating uninterruptedly, which ensures a constant source of electricity. This investigation includes a clear overview of the wind velocity, the flow direction;the amount of energy reserved, suitable regions for wind turbine installation, etc. The feasibility and possibility of installing a wind energy conversion system for several locations in Bangladesh are analyzed. A brief study of wind characteristics in different locations in Bangladesh is reported. Wind data obtained from the Bangladesh Meteorological Department (Bmd. for Mongla, Patuakhali, Kutubdia, and Bhola stations are analyzed through wind rose, frequency distribution, and average wind velocity. The performance of suitable small-scale wind turbines will be assessed in order to confirm the prospect of wind turbines in Bangladesh.

关键词： Wind Velocity Flow Direction Wind Turbine Power

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