Levels and determinants of complementary feeding based on meal frequency among children of 6 to 23 months in Bangladesh
- Chowdhury, Mohammad, Rahman, Shafiur, Khan, Mobarak
- Authors: Chowdhury, Mohammad , Rahman, Shafiur , Khan, Mobarak
- Date: 2016
- Type: Text , Journal article
- Relation: BMC public health Vol. 16, no. 1 (2016), p. 944
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- Description: Information concerning complementary feeding (CF) practice during infancy and early childhood is still scarce in Bangladesh. Therefore, this study aimed to estimate the level of CF among children of 6-23 months and identify individual, household and community level determinants in Bangladesh.
- Authors: Chowdhury, Mohammad , Rahman, Shafiur , Khan, Mobarak
- Date: 2016
- Type: Text , Journal article
- Relation: BMC public health Vol. 16, no. 1 (2016), p. 944
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- Description: Information concerning complementary feeding (CF) practice during infancy and early childhood is still scarce in Bangladesh. Therefore, this study aimed to estimate the level of CF among children of 6-23 months and identify individual, household and community level determinants in Bangladesh.
Effects of brown coal fly ash on 30% monoethanolamine CO₂ capture systems
- Authors: Chowdhury, Mohammad
- Date: 2019
- Type: Text , Thesis , PhD
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- Description: Accumulation of fly ash during post-combustion capture (PCC) of CO2 is an emerging concern. This work assesses concerns that soluble ash components (e.g. Na, Ca, Mg) increase conductivity of amine systems increasing corrosion rates, and decreasing CO2 capture e ciency; slightly soluble metals ions (e.g. Fe) may catalyse amine oxidation; and insoluble ash components cause erosion and blockages in the PCC plants as well as providing catalytic surfaces. Loy Yang brown-coal y ashes (using XRD, SEM, EDS and ICP-MS) are rst characterised and separated into soluble, insoluble and char fractions. The e ect of each fraction on MEA oxidation (measured by UV-vis and organic acid formation) and corrosion is determined using lab-scale experiments in static and stirred pressurised reactors at simulated PCC stripper conditions. Fly ash was three times more soluble in severely oxidising conditions compared to mild 30% MEA extractions. Vantho te represents 10-20% of the y ash and was the main source of sodium, calcium and magnesium ions while Szmolnockite was a source of iron. Iron solubility was dependent on conditions, with 5% soluble in aqueous MEA and 10% in simulated desorber conditions. The soluble fraction was the only ash fraction to signi cantly promote MEA oxidation. Aged pall rings from a PCC pilot plant had severe grain boundary corrosion and chromiumoxide depletion. Grain boundary corrosion was less severe in pall rings under severely oxidising conditions. The e ects of soluble ash were unclear while organic acids promoted pitting. Fly ash is an important source of soluble sodium, calcium and iron into 30% MEA. The insoluble fraction had minimal impact on MEA oxidation and corrosion, suggesting that it was inert. Soluble ash fractions increased corrosion severity and promoted MEA oxidation. This work shows that deep y ash removal prior to PCC is particularly important for ashes with high solubility in the CO2 absorption system.
- Description: Doctor of Philosophy
- Authors: Chowdhury, Mohammad
- Date: 2019
- Type: Text , Thesis , PhD
- Full Text:
- Description: Accumulation of fly ash during post-combustion capture (PCC) of CO2 is an emerging concern. This work assesses concerns that soluble ash components (e.g. Na, Ca, Mg) increase conductivity of amine systems increasing corrosion rates, and decreasing CO2 capture e ciency; slightly soluble metals ions (e.g. Fe) may catalyse amine oxidation; and insoluble ash components cause erosion and blockages in the PCC plants as well as providing catalytic surfaces. Loy Yang brown-coal y ashes (using XRD, SEM, EDS and ICP-MS) are rst characterised and separated into soluble, insoluble and char fractions. The e ect of each fraction on MEA oxidation (measured by UV-vis and organic acid formation) and corrosion is determined using lab-scale experiments in static and stirred pressurised reactors at simulated PCC stripper conditions. Fly ash was three times more soluble in severely oxidising conditions compared to mild 30% MEA extractions. Vantho te represents 10-20% of the y ash and was the main source of sodium, calcium and magnesium ions while Szmolnockite was a source of iron. Iron solubility was dependent on conditions, with 5% soluble in aqueous MEA and 10% in simulated desorber conditions. The soluble fraction was the only ash fraction to signi cantly promote MEA oxidation. Aged pall rings from a PCC pilot plant had severe grain boundary corrosion and chromiumoxide depletion. Grain boundary corrosion was less severe in pall rings under severely oxidising conditions. The e ects of soluble ash were unclear while organic acids promoted pitting. Fly ash is an important source of soluble sodium, calcium and iron into 30% MEA. The insoluble fraction had minimal impact on MEA oxidation and corrosion, suggesting that it was inert. Soluble ash fractions increased corrosion severity and promoted MEA oxidation. This work shows that deep y ash removal prior to PCC is particularly important for ashes with high solubility in the CO2 absorption system.
- Description: Doctor of Philosophy
Bangladesh accountants and Continuing Professional Development : Views from a less developed country
- Halabi, Abdel, Chowdhury, Mohammad
- Authors: Halabi, Abdel , Chowdhury, Mohammad
- Date: 2018
- Type: Text , Journal article
- Relation: Journal of Accounting in Emerging Economies Vol. 8, no. 4 (2018), p. 514-526
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- Description: Purpose: The purpose of this paper is to examine professional accountant’s views on their satisfaction with Continuing Professional Development (CPD) offered by members of the Institute of Chartered Accountants of Bangladesh (ICAB). While there is a great deal of research on CPD and accountants in developed countries, less developing countries are absent from this literature, and there have been calls for this type of research. Design/methodology/approach: The present study employed a survey of members of the ICAB. Findings: Results show that accountants in Bangladesh are satisfied with the CPD provided by their profession, and when satisfaction is compared with more developed countries, Bangladesh is greater on a number of measures. ICAB members would like to also be provided with opportunities to undertake CPD in more ways than just face to face. Practical implications: The study has important implications not only for accountants from emerging economies such as Bangladesh, but also for the International Federation of Accountants and other less developed countries (LDCs). The results advance the understanding of professional accounting bodies from an international perspective. Originality/value: This is the first study of CPD and accounting professionals in LDCs. The information obtained can inform the development and practice of other professional accounting bodies in emerging economies.
Psychological distress among bangladeshi dental students during the covid-19 pandemic
- Sabrina, Farah, Chowdhury, Mohammad, Nath, Sujan, Imon, Ashik, Abdul Quader, S., Jahan, Md Shahed, Noor, Ashek, Podder, Clopa, Gainju, Unisha, Niroula, Rina, Rahman, Muhammad Aziz
- Authors: Sabrina, Farah , Chowdhury, Mohammad , Nath, Sujan , Imon, Ashik , Abdul Quader, S. , Jahan, Md Shahed , Noor, Ashek , Podder, Clopa , Gainju, Unisha , Niroula, Rina , Rahman, Muhammad Aziz
- Date: 2022
- Type: Text , Journal article
- Relation: International Journal of Environmental Research and Public Health Vol. 19, no. 1 (2022), p.
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- Description: Background: Psychological sufferings are observed among dental students during their academic years, which had been intensified during the COVID-19 pandemic. Objectives: This study assessed the levels and identified factors associated with psychological distress, fear and coping experienced by dental undergraduate students in Bangladesh. Methods: A cross sectional online survey was conducted during October-November, 2021. The Kessler Psychological Distress Scale (K-10), Fear of COVID-19 Scale (FCV-19S) and Brief Resilient Coping Scale (BRCS) were used in order to assess psychological distress, fear and coping strategies, respectively. Results: A total of 327 students participated; the majority (72%) were 19–23 years old and females (75%). One in five participants were infected with COVID-19 and 15% reported contact with COVID-19 cases. Negative financial impact (AOR 3.72, 95% CIs 1.28–10.8), recent or past COVID-19 infection, and contact with COVID-19 cases were associated with higher levels of psychological distress; but being a third year student (0.14, 0.04–0.55) and being satisfied about current social life (0.11, 0.03–0.33) were associated with lower levels of psychological distress. Being a third year (0.17, 0.08–0.39) and a fourth year student (0.29, 0.12–0.71) were associated with lower levels of fear. Health care service use and feeling positive about life were associated with medium to high resilience coping. Conclusions: This study identified dental students in Bangladesh who were at higher risk of psychological distress, fear and coping during the ongoing pandemic. Development of a mental health support system within dental institutions should be considered in addition to the academic and clinical teaching. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
- Authors: Sabrina, Farah , Chowdhury, Mohammad , Nath, Sujan , Imon, Ashik , Abdul Quader, S. , Jahan, Md Shahed , Noor, Ashek , Podder, Clopa , Gainju, Unisha , Niroula, Rina , Rahman, Muhammad Aziz
- Date: 2022
- Type: Text , Journal article
- Relation: International Journal of Environmental Research and Public Health Vol. 19, no. 1 (2022), p.
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- Reviewed:
- Description: Background: Psychological sufferings are observed among dental students during their academic years, which had been intensified during the COVID-19 pandemic. Objectives: This study assessed the levels and identified factors associated with psychological distress, fear and coping experienced by dental undergraduate students in Bangladesh. Methods: A cross sectional online survey was conducted during October-November, 2021. The Kessler Psychological Distress Scale (K-10), Fear of COVID-19 Scale (FCV-19S) and Brief Resilient Coping Scale (BRCS) were used in order to assess psychological distress, fear and coping strategies, respectively. Results: A total of 327 students participated; the majority (72%) were 19–23 years old and females (75%). One in five participants were infected with COVID-19 and 15% reported contact with COVID-19 cases. Negative financial impact (AOR 3.72, 95% CIs 1.28–10.8), recent or past COVID-19 infection, and contact with COVID-19 cases were associated with higher levels of psychological distress; but being a third year student (0.14, 0.04–0.55) and being satisfied about current social life (0.11, 0.03–0.33) were associated with lower levels of psychological distress. Being a third year (0.17, 0.08–0.39) and a fourth year student (0.29, 0.12–0.71) were associated with lower levels of fear. Health care service use and feeling positive about life were associated with medium to high resilience coping. Conclusions: This study identified dental students in Bangladesh who were at higher risk of psychological distress, fear and coping during the ongoing pandemic. Development of a mental health support system within dental institutions should be considered in addition to the academic and clinical teaching. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
A study on the corrosion characteristics of internal combustion engine materials in second-generation jatropha curcas biodiesel
- Shahabuddin, M., Mofijur, M., Shuvho, Md Bengir, Chowdhury, M., Kalam, Md Abul, Masjuki, Haji, Chowdhury, Mohammad
- Authors: Shahabuddin, M. , Mofijur, M. , Shuvho, Md Bengir , Chowdhury, M. , Kalam, Md Abul , Masjuki, Haji , Chowdhury, Mohammad
- Date: 2021
- Type: Text , Journal article
- Relation: Energies Vol. 14, no. 14 (2021), p.
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- Description: The corrosiveness of biodiesel affects the fuel processing infrastructure and different parts of an internal combustion (IC) engine. The present study investigates the corrosion behaviour of automotive materials such as stainless steel, aluminium, cast iron, and copper in 20% (B20) and 30% (B30) by volume second-generation Jatropha biodiesel using an immersion test. The results were compared with petro-diesel (B0). Various fuel properties such as the viscosity, density, water con-tent, total acid number (TAN), and oxidation stability were investigated after the immersion test using ASTM D341, ASTM D975, ASTM D445, and ASTM D6751 standards. The morphology of the corroded materials was investigated using optical microscopy and scanning electron microscopy SEM), whereas the elemental analysis was carried out using energy-dispersive X-ray spectroscopy (EDS). The highest corrosion using biodiesel was detected in copper, while the lowest was detected in stainless steel. Using B20, the rate of corrosion in copper and stainless steel was 17% and 14% higher than when using diesel, which further increased to 206% and 86% using B30. After the immersion test, the viscosity, water content, and TAN of biodiesel were increased markedly compared to petro-diesel. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
- Authors: Shahabuddin, M. , Mofijur, M. , Shuvho, Md Bengir , Chowdhury, M. , Kalam, Md Abul , Masjuki, Haji , Chowdhury, Mohammad
- Date: 2021
- Type: Text , Journal article
- Relation: Energies Vol. 14, no. 14 (2021), p.
- Full Text:
- Reviewed:
- Description: The corrosiveness of biodiesel affects the fuel processing infrastructure and different parts of an internal combustion (IC) engine. The present study investigates the corrosion behaviour of automotive materials such as stainless steel, aluminium, cast iron, and copper in 20% (B20) and 30% (B30) by volume second-generation Jatropha biodiesel using an immersion test. The results were compared with petro-diesel (B0). Various fuel properties such as the viscosity, density, water con-tent, total acid number (TAN), and oxidation stability were investigated after the immersion test using ASTM D341, ASTM D975, ASTM D445, and ASTM D6751 standards. The morphology of the corroded materials was investigated using optical microscopy and scanning electron microscopy SEM), whereas the elemental analysis was carried out using energy-dispersive X-ray spectroscopy (EDS). The highest corrosion using biodiesel was detected in copper, while the lowest was detected in stainless steel. Using B20, the rate of corrosion in copper and stainless steel was 17% and 14% higher than when using diesel, which further increased to 206% and 86% using B30. After the immersion test, the viscosity, water content, and TAN of biodiesel were increased markedly compared to petro-diesel. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
Knowledge, attitudes and practices of COVID-19 in rural Bangladesh : a cross-sectional study
- Siddiquea, Bodrun, Afroz, Afsana, Chowdhury, Mohammad, Savira, Feby, Alif, Sheikh, Bhattacharya, Oashe, Hossain, Md Nassif, Ali, Liaquat, Chowdhury, Hasina, Shetty, Aishwarya, Islam, Md Shariful, Billah, Baki
- Authors: Siddiquea, Bodrun , Afroz, Afsana , Chowdhury, Mohammad , Savira, Feby , Alif, Sheikh , Bhattacharya, Oashe , Hossain, Md Nassif , Ali, Liaquat , Chowdhury, Hasina , Shetty, Aishwarya , Islam, Md Shariful , Billah, Baki
- Date: 2023
- Type: Text , Journal article
- Relation: BMJ Open Vol. 13, no. 2 (2023), p.
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- Description: Objectives Understanding the knowledge, attitudes and practices (KAP) of COVID-19 within distinct populations may aid further public health messaging. This study's aims were to explore KAP towards COVID-19 in rural Bangladesh and identify any potential links to sociodemographics, existing clinical conditions and sources of information. Design Cross-sectional community-based study. Setting Participants were recruited from 18 villages using multistage cluster random sampling. Methods Data were collected through face-to-face interviews, from June to November 2021, using a structured questionnaire. Data included sociodemographics, clinical conditions, sources of information and KAP of COVID-19 questions.
- Authors: Siddiquea, Bodrun , Afroz, Afsana , Chowdhury, Mohammad , Savira, Feby , Alif, Sheikh , Bhattacharya, Oashe , Hossain, Md Nassif , Ali, Liaquat , Chowdhury, Hasina , Shetty, Aishwarya , Islam, Md Shariful , Billah, Baki
- Date: 2023
- Type: Text , Journal article
- Relation: BMJ Open Vol. 13, no. 2 (2023), p.
- Full Text:
- Reviewed:
- Description: Objectives Understanding the knowledge, attitudes and practices (KAP) of COVID-19 within distinct populations may aid further public health messaging. This study's aims were to explore KAP towards COVID-19 in rural Bangladesh and identify any potential links to sociodemographics, existing clinical conditions and sources of information. Design Cross-sectional community-based study. Setting Participants were recruited from 18 villages using multistage cluster random sampling. Methods Data were collected through face-to-face interviews, from June to November 2021, using a structured questionnaire. Data included sociodemographics, clinical conditions, sources of information and KAP of COVID-19 questions.
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