Hydrothermal Synthesis and Characterization of One-dimensional Ceria Nanorod for Chromium Ion Removal from Wastewater

Remediation of wastewater contaminated with Cr(VI) species by ceria particles has received considerable attention in recent years. The main objectives of the present study were to investigate the adsorption of Cr(VI) species on the one-dimensional (1-D) ceria nanorod (CeNR). In where, CeNR has 20–40 nm in diameter and 200–300 nm in length, as confirmed through FE-SEM and TEM images. Higher surface area of CeNR is insisted to the remediation of Cr(VI)-contaminated wastewaters. This work exemplifies the utilization of XAS and BET to reveal the speciation of CeNR for further understands of the very complex adsorption process. It is also very clear that decontamination of Cr species in wastewater via the in-situ remediation with CeNR permeable reactive barriers would be environmentally attractive in the near future. Keywords: Cr(VI)-contaminant, One-dimensional Ceria, Wastewater treatment; XANES/EXAFS

Oral Health Behavior and Dental Caries status: A comparative study between rural and urban school-going children in Dhaka Division

Introduction: The importance of oral health in children is paramount. Proper techniques of brushing and the influence of fermentable carbohydrates in dental caries should be taught at the early childhood stage. Objective: To estimate the mean deft, DMFT, Oral health-related behavior, and practice among the selected rural and urban school-going children in Bangladesh. Materials and Methods: This was a cross-sectional study carried out among 593 (152 rural and 441 urban children) school children using the purposive sampling technique. Data were collected from 3 urban schools and 1 rural school, using an interview-based structured questionnaire and oral examination. Consent was taken both from the college authority and participants before data collection. Descriptive analysis was performed. Results and Discussion: The study was carried out among 593 school children with an age range between below 5 years to above 15 years old. The majority of the students at urban schools brush their teeth twice daily while most rural school children brush their teeth once daily. Most of the students use toothbrushes and toothpaste as cleaning aids, however, the majority of them usually brush before meals. In addition, the majority of the students at rural and urban schools do not brush their teeth after taking sweet foods. Mean deft in deciduous teeth is high among rural school children (2.07) while mean DMFT in permanent teeth is high among urban schools. Conclusion: Organized and systemic community oral health promotion should be strengthened and a prevention-oriented oral health system is needed for promoting future oral self-care practices among school children

Self-Reported Side Effects of Different COVID-19 Vaccines in Bangladesh- A Vaccine Recipient Survey

Background: COVID-19 (Corona Virus disease 2019) is a newly discovered disease that originated in China and quickly spread throughout the world, killing millions of people and infecting many more. People have a new hope due to newly discovered vaccines for this fatal disease. However, the vaccines showed a number of side effects on the people receiving them. Nonetheless, it has proven to be helpful in providing protection against the fatal infection. Purpose: To analyze the probable side effects of the vaccines experienced by vaccine recipient and their belief regarding vaccine. Method: An online survey was conducted through different social media platforms and Email from 11 July’2021 to 16 July’2021. Ethical permission and consent was taken prior to the survey and data collections. Occurance and the extent of vaccine side effects were analyzed using descriptive and logistic regression analysis. Result: Among 175 vaccine recipients, 92 (52.58%) received one dose and 83 (47.42%) received two doses, with 93 (53.1) receiving SinoPharm vaccine, 78 (44.6) receiving AstraZeneca vaccine, and 4 (2.3%) receiving Pfizer vaccine. More than half of the respondents experienced side effects among which headaches (50.3%) and drowsiness (45.71%) were common followed by fever (36%) and muscle ache (32%). Female (P=0.000) and vaccine concerned group (P=0.033) experienced more side effects. Headache (68.8%), fever (40.9%) and drowsiness (50.5%) were more common among Sinopharm recipients. Fever (50%) and muscle ache (50%) were more common among Pfizer recipients while muscle ache (43.5%) and drowsiness (42.3%) were common among AstraZaneca recipients group. Conclusion: Headache, fever, muscular discomfort, soreness at the injection site, drowsiness, nausea, and other adverse effects are common with the COVID vaccination. Females are more susceptible to side effects than males, and the probability of experiencing them increases with the second dose. AstraZeneca vaccine recipient experiencing more side effects than other types of vaccine recipients

Exploring the knowledge, awareness and practices of COVID-19 among dentists in Bangladesh: A Cross-sectional Investigation

Background: COVID-19 pandemic has caused an unpre-cedented strike on humanity around the world . The scenario in Bangladesh is getting worse day by day, and every aspect of the society is observing its impact. Health care professionals are at a greater risk of contracting the disease while caring for patients. Objective: The research objective is to explore knowledge, awareness, and practices of registered dentists regarding COVID-19 epidemiology and transmission during the rapid outbreak of this highly contagious virus in Bangladesh. Material and Methods: A cross-sectional web-based survey was conducted among the dentists who were enrolled with their valid unique Bangladesh Medical and Dental Council (BMDC) registration number. A structured questionnaire was distributed among the dentists through different social media platforms. A total of 184 dentists participated in the survey between March and April 2020. Both descriptive analysis and multivariable logistic regression analysis was performed. Results: The dentists' mean age was 31.75 years, with a standard deviation of 6.5 years. About 29.3% of dentists completed their postgraduate qualification, and 76% of them were engaged in private practice at the time of data collection. Compared to the dentists with undergraduate education, the dentists with a postgraduate education are three times (OR=3.1, 95%CI 1.2-7.9 and over 5 times (OR=5.3, 95% CI: 1.2-23.3) more likely to have) better knowledge and practices toward COVID-19 respectively. Dentists aged 26-30 years are less likely to have good practices than the younger dentists (OR: .1; 95% CI: .01-.5). However, dentists with less than five years experience are 10.3 (1.6-68.9) times more likely to have good practices compared to the dentists with more experience. Conclusion: Majority of the dentists from Bangladesh have shown good knowledge, awareness, and practice regarding COVID-19. We recommend that the healthcare authorities, professional organizations, and hospitals coordinate, and conduct mandatory advanced infectious disease training for all the practicing dentists in the country

COVID-19 Vaccination Intent and Willingness to Pay in Bangladesh: A Cross-Sectional Study.

This article reports the intent to receive a SARS-COV-2 vaccine, its predictors and willingness to pay in Bangladesh. We carried out an online cross-sectional survey of 697 adults from the general population of Bangladesh in January 2021. A structured questionnaire was used to assess vaccination intent. The questionnaire included sociodemographic variables and health belief model constructs which may predict vaccination intent. Among the participants, 26% demonstrated a definite intent, 43% probable intent, 24% probable negative, and 7% a definite negative intention. Multivariable logistic regression analyses suggest an association between definite intent and previous COVID-19 infection (OR: 2.86; 95% CI: 1.71-4.78), perceiving COVID-19 as serious (OR: 1.93; 1.04-3.59), the belief that vaccination would make them feel less worried about catching COVID-19 (OR: 4.42; 2.25-8.68), and concerns about vaccine affordability (OR: 1.51; 1.01-2.25). Individuals afraid of the side effects (OR: 0.34; 0.21-0.53) and those who would take the vaccine if the vaccine were taken by many others (OR: 0.44; 0.29-0.67) are less likely to have a definite intent. A definite negative intent is associated with the concern that the vaccine may not be halal (OR: 2.03; 1.04-3.96). Furthermore, 68.4% are willing to pay for the vaccine. The median amount that they are willing to pay is USD 7.08. The study findings reveal that the definite intent to receive the SARS-CoV-2 vaccination among the general population varies depending on their COVID-19-related health beliefs and no significant association was found with sociodemographic variables