Rokaia Sultana

Purdue University West Lafayette

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Shahnaz Sultana

University of Sydney

Md. Ripaj Uddin

Bangladesh Council of Scientific and Industrial Research

Shamim Ahmed

Bangladesh Council of Scientific and Industrial Research

Robert V. Stahelin

Purdue University West Lafayette

Shakila Akter

Bangladesh Council of Scientific and Industrial Research

AHM Shofiul Islam Molla Jamal

Bangladesh Council of Scientific and Industrial Research

Aarif Jamal

Bangladesh Council of Scientific and Industrial Research

Muhammad Manjurul Karim

University of Dhaka

Mehedi Hasan

Bangabandhu Sheikh Mujibur Rahman Agricultural University

Aynun Nahar

Noakhali Science and Technology University

Cooperative Institutions

Bangladesh Council of Scientific and Industrial Research

University of Dhaka

Primeasia University

Purdue University West Lafayette

Bangabandhu Sheikh Mujibur Rahman Agricultural University

University of Malaya

University of Chicago

Chicago Institute for Psychoanalysis

Argonne National Laboratory

Bangladesh University of Professionals

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Quality Assessment of Bottled and Unbottled Drinking Water in Bangladesh

Water (2021)

Md. Ripaj Uddin Mayeen Uddin Khandaker Md. Jainal Abedin Nahida Akter AHM Shofiul Islam Molla Jamal

The demand for bottled drinking water in Bangladesh is becoming popular due to the lack of safe drinking water sources. The present study was carried out to assess the water quality and public health impacts of local brands of bottled drinking water and tube-well water, compared to the imported ones. Several state-of-the-art techniques were employed to determine the contents of pH, EC, salinity, chloride, nitrates, nitrites, fluoride, sulfates, phosphates, bicarbonate, turbidity, color, total hardness, and total dissolved solids in the studied water samples. The measured data show that the level of dissolved minerals in the local branded bottled water is very low (with an exception for sample codes D1 and D8), while imported brands, Zamzam water, and tube-well water contain satisfactory level of minerals and fulfill Dietary Reference Intake requirements. Total coliform, fecal coliform, and E. coli were found to be absent in local brands of bottled water and tube-well water. On the other hand, concentrations of some radionuclides 40K, 238U, 226Ra, 210Pb, 210Po, 222Rn, 137Cs, and 232Th in local bottled water and tube-well water were found to be less than the permissible level given by WHO (2011). The results reveal that local bottled drinking water manufacturing companies may not be following standard guidelines and quality control steps properly. Thus, improvement in their standard operating process is urgently needed to ensure strict compliance with guidelines set by Bangladesh standards and testing institutions.

Bottled water

Turbidity

Maximum Contaminant Level

10.3390/w13152026

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Citations (17)

Physicochemical and Microbiological Quality of Potable Water Supplied by DWASA in Dhaka City of Bangladesh

American Journal of Biological and Environmental Statistics (2020)

Aarif Jamal Md. Aminul Ahsan Shamim Ahmed Shakila Akter Rokaia Sultana

Dhaka is the largest and fastest-growing urban city in Bangladesh with a population density of 44,500/km². Dhaka Water Supply and Sewerage Authority (DWASA) is the sole legal entity to develop and maintain a water supply system for city people. 78% DWASA water comes from underground—which leads to incremental depletion of groundwater. In this condition, reducing groundwater dependence and switching to surface water is the only way forward. Growing and increasingly wealthier population, climate change and the urbanization process deteriorate the Shitalakshya River which is the surface water source of DWASA. The purpose of this study was to investigate the DWASA supplied water quality around Dhaka city. Physicochemical and microbiological Parameters were analyzed by American Public Health Association (APHA) standard methods. The measured pH value (6.58-7.03) and Dissolved Oxygen (DO) value (6.10-7.50 mg/L) of samples indicate safe potable water. Calcium and Magnesium were found at a significant level. Both of these elements are essential for the human body. There were no heavy metals contamination in water supplied by DWASA. Total Coliforms and Fecal Coliforms of all samples showed less than 0.2 MPN/mL (most probable number <0.2 indicates absence of test organism in 1 mL). Total Viable Count (TVC) of all samples were less than 100 cfu/mL. The observed result was compared to acceptable limit of drinking water of Bangladesh Standards and Testing Institution (BSTI) and Environment Conservation Rules, 1997, Bangladesh guideline. This study demonstrated that in general the potable water quality status of Dhaka city ranged from excellent to good.

Potable water

10.11648/j.ajbes.20200601.11

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Citations (19)

Potential role of Zinc supplement in CVD and COVID-19 co-morbidity

Muhammad Manjurul Karim Shahnaz Sultana Rokaia Sultana Mohammad Tariqur Rahman

As far as the comorbidity is concerned, cardiovascular diseases (CVD) appear to be accounted for the highest prevalence, severity, and fatality among COVID 19 patients. A wide array of causal links connecting CVD and COVID-19 baffle the overall prognosis as well as the efficacy of the given therapeutic interventions. At the centre of this puzzle lies ACE2 that works as a receptor for the SARS-CoV-2 and functional expression of which is also needed to minimize vasoconstriction otherwise would lead to high blood pressure. Furthermore, SARS-CoV-2 infection seems to reduce the functional expression of ACE2. Given these circumstances, it might be advisable to consider a treatment plan for COVID-19 patients with CVD in an approach that would neither aggravate the vasodeleterious arm of RAAS nor compromise the vasoprotective arm of RAAS but is effective to minimize or if possible, inhibit the viral replication. A zinc supplement to the selective treatment plan, to be decided by the clinicians depending on the cardiovascular conditions of the patients, is hereafter proposed that might greatly enhance the therapeutic outcome. Notably, ACE2 is a zinc metalloenzyme and zinc is also known to inhibit viral replication.

Case fatality rate

10.14293/s2199-1006.1.sor-.pp3zkdj.v1

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Citations (1)

An industrially potent rhamnolipid-like biosurfactant produced from a novel oil-degrading bacterium, Bacillus velezensis S2

RSC Advances (2024)

Shahnaz Sultana Rokaia Sultana Md. Abdullah Al-Mansur Md. Ahedul Akbor Nasrin Akter Bhuiyan

An oil-degrading bacteria, Bacillus velezensis S2, was found to produce rhamnolipid-like biosurfactant which showed significant emulsification and foaming activity while reducing the surface tension remarkably. This offers more ecological sustainability than the toxic chemical surfactants.

Rhamnolipid

10.1039/d4ra02572e

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Possible Benefits of Zinc supplement in CVD and COVID-19 Comorbidity

Journal of Infection and Public Health (2021)

Muhammad Manjurul Karim Shahnaz Sultana Rokaia Sultana Mohammad Tariqur Rahman

As far as comorbidity is concerned, cardiovascular diseases (CVD) appear to be accounted for the highest prevalence, severity, and fatality among COVID 19 patients. A wide array of causal links connecting CVD and COVID-19 baffle the overall prognosis as well as the efficacy of the given therapeutic interventions. At the centre of this puzzle lies ACE2 that works as a receptor for the SARS-CoV-2, and functional expression of which is also needed to minimize vasoconstriction otherwise would lead to high blood pressure. Furthermore, SARS-CoV-2 infection seems to reduce the functional expression of ACE2. Given these circumstances, it might be advisable to consider a treatment plan for COVID-19 patients with CVD in an approach that would neither aggravate the vasodeleterious arm of the renin-angiotensinogen-aldosterone system (RAAS) nor compromise the vasoprotective arm of RAAS but is effective to minimize or if possible, inhibit the viral replication. Given the immune modulatory role of Zn in both CVD and COVID-19 pathogenesis, zinc supplement to the selective treatment plan for CVD and COVID-19 comorbid conditions, to be decided by the clinicians depending on the cardiovascular conditions of the patients, might greatly improve the therapeutic outcome. Notably, ACE2 is a zinc metalloenzyme and zinc is also known to inhibit viral replication.

Pathogenesis

Pandemic

10.1016/j.jiph.2021.09.022

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Citations (13)

Direct lipid interactions control SARS-CoV-2 M protein conformational dynamics and virus assembly

bioRxiv (Cold Spring Harbor Laboratory) (2024)

Mandira Dutta Kimberly A. Dolan Souad Amiar E.J. Bass Rokaia Sultana

Abstract M is the most abundant structural membrane protein in coronaviruses and is essential for the formation of infectious virus particles. SARS-CoV-2 M adopts two conformations, M short and M long , and regulated transition between states is hypothesized to coordinate viral assembly and budding. However, the factors that regulate M conformation and roles for each state are unknown. Here, we discover a direct M-sphingolipid interaction that controls M conformational dynamics and virus assembly. We show M binds Golgi-enriched anionic lipids including ceramide-1-phosphate (C1P). Molecular dynamics simulations show C1P interaction promotes a long to short transition and energetically stabilizes M short . Cryo-EM structures show C1P specifically binds M short at a conserved site bridging transmembrane and cytoplasmic regions. Disrupting M short -C1P interaction alters M subcellular localization, reduces interaction with Spike and E, and impairs subsequent virus-like particle cell entry. Together, these results show endogenous signaling lipids regulate M structure and support a model in which M short is stabilized in the early endomembrane system to organize other structural proteins prior to viral budding.

Dynamics

2019-20 coronavirus outbreak

Coronavirus

10.1101/2024.11.04.620124

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Citations (0)

Prevalence of Multi-drug Resistance Pattern of Escherichia coli in Different Ages and Gender of Urinary Tract Infected Patients

Microbiology Research Journal International (2018)

Rokaia Sultana Palash Sarkar Jakia Khan Suvamoy Datta

Multi drug resistant

10.9734/mrji/2018/41140

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Investigation of the Domestic Reservoirs of Diarrheagenic Escherichia coli in Diarrhea Case Households of Urban Bangladesh

Current Microbiology (2021)

Zenat Zebin Hossain Rokaia Sultana Anowara Begum Peter Kjær Mackie Jensen

Multilocus sequence typing

STX2

Food contaminant

10.1007/s00284-021-02506-9

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Citations (5)

Diabetic foot ulcer-a systematic review on relevant microbial etiology and antibiotic resistance in Asian countries

Diabetes & Metabolic Syndrome Clinical Research & Reviews (2023)

Rokaia Sultana Iftekhar Ahmed Sabera Saima Moushumi Tabassoom Salam Shahnaz Sultana

Interquartile range

Amikacin

Etiology

Linezolid

Colistin

10.1016/j.dsx.2023.102783

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Citations (11)

Spatial Variation of Rainwater Quality Parameters at Khulna City of Bangladesh

Journal of environment pollution and human health (2020)

Aarif Jamal Shamim Ahmed Shakila Akter Aynun Nahar Rokaia Sultana

In the present study, rainwater samples were collected from the Khulna city of Bangladesh during pre-monsoon season (March-May) and monsoon season (June-October) with standard rainwater collection instruments in the year 2017 to 2019 to evaluate their physical and chemical quality parameters properties. The following water quality parameters were determined: pH, EC, TDS, DO, alkalinity, acidity, hardness, Ca2+, Mg2+, SO42-, NO32-, Cl- and heavy metals. This study revealed that rain water quality was within the permissible drinking water standards limits prescribed by Environment Conservation Rule (ECR, 1997) of Bangladesh. Metal ions (As, Cd, Cr, Pd and Hg) were found in below the detection limit (BDL) of AAS for these collected rainwater samples. Rainwater quality during monsoon season was better than that of pre-monsoon season in Khulna city due to particle of dusts in the air. Atmospheric suspended particulate matter (SPM) including PM10 might be contributed some parameters; EC TSD, Ca2+, Mg2+, SO42-, NO32 and pH may be slightly changed due to present gaseous components (CO2, SO2 and NO2). If rainwater is properly harvested that will be a safe, cost effective and alternative to provide an access to safe drinking water in the saline coastal region of Khulna area.

Rainwater Harvesting

Alkalinity

Wet season

Dry season

Acid rain

10.12691/jephh-8-2-2

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Citations (5)