Assessment of the Carbon Footprint and VOCs Emissions Caused by the Manufacturing Process of the Footwear Industry in Bangladesh

Every industry has an impact on the environment, either good or bad, and leather and footwear industries are no exception. For the footwear industry, the main environmental impacts are the releasing of volatile organic compounds (VOCs) and solid wastes. The pressure of reducing harm to the environment is coming from both the consumers and the legislation. CO2 and VOCs are hazardous to human health and also trigger serious environment problems, such as ozone layer depletion, offensive odour, photochemical smog, acid rain and many others. Adhesives, finishing products and cleaners contribute to VOCs emissions in the footwear manufacturing industry. VOCs emission may also arise from primers, separating agents, printing inks or finishing pastes. Some most commonly produced VOCs in the footwear manufacturing industry are benzene, toluene, styrene, ethylene, xylene, acetaldehyde, formaldehyde, methyl ethyl ketone, chlorobenzene, phenol etc. All of these cause severe health problems in humans and have an adverse effect on the environment. An increasing number of footwear factories adversely affects the environment and human health. One of the largest environmental impacts of shoe industry comes from the manufacturing stages of the shoe’s life cycle. This study was carried out to measure the carbon footprint and VOCs emissions among ten selected footwear factories. The results revealed that the total energy footprint for one pair of shoes is 18.004826 MJ, the water footprint is 8.37167 litres and the carbon footprint is 9.174979 kg CO2 eq. The highest impact in terms of the carbon footprint lies in the shoe manufacturing process with a 5.85109 eq. CO2 (kg). The total VOCs consumption for a fashion shoe is around 36.5 g/pair on average. There should be an initiative taken with the aim of adjusting the choice of methods, materials, machines and the monitoring systems as well as the safety policy for the workers and the environment

Infection and co-infection patterns of common upper respiratory tract viruses in patients with flu-like symptoms attending a fever clinic of a tertiary care hospital during the COVID-19 pandemic

Background: More than 200 viruses can cause respiratory tract infections. It is clinically indistinguishable to differentiate SARS-CoV-2 viral infections from other viruses that cause flu-like symptoms. This study was done to determine the infection and co-infection patterns of common respiratory tract viruses in patients with flu-like symptoms attending a fever clinic during the COVID-19 pandemic. Methods: A total of 288 participants attending the Fever Clinic of Bangabandhu Sheikh Mujib Medical University having respiratory symptoms were enrolled in this cross-sectional study done from November 2021 to March 2022. Nasopharyngeal swabs were obtained for molecular detection of selected respiratory viruses by multiplex polymerase chain reaction. Results: The study participants were aged 18 to 72 (mean 33.2) years. SARS-CoV-2 infection was 16.7% among the participants, while other respiratory viruses were 24.3% that included rhinovirus (14.6%) followed by adenovirus (5.6%) and parainfluenza viruses (3.5%). SARS CoV-2 and rhinovirus (29.4%), adenovirus and rhinovirus (23.5%), and rhinovirus and parainfluenza virus (17.6%) were the most common co-infections among them (n = 17). Conclusion: Nearly 17% infections were caused by SARS-CoV-2. Rhinovirus infection was the second most common of other  upper respiratory viral infections. There is also evidence of co-infections between SARS-CoV-2 and other common upper respiratory tract viruses

Finite Element Analysis of Steel Fiber Reinforced Concrete (SFRC): Validation of Experimental Shear Capacities of Beams

AbstractFinite element models are analyzed and validated with the experimental shear capacities of steel fiber reinforced concrete (SFRC) as well as plain concretes. In this work, steel fibers with low aspect ratio which are commonly available in Bangladesh are used and sufficient capacity enhancements are attained. Two different aggregate types are used to make the SFRC and plain concrete beam specimens, i.e. stone and brick, and also modelled in the finite element (FE) platform of ANSYS 10.0 with SOLID65 element. The experimental plan intended to investigate the shear capacity enhancement of three different types of beam specimens, i.e. single shear, double shear and flexural shear. All the specimens are tested in the 1000kN capacity digital universal testing machine (UTM) and the strain data are obtained from digital image correlation technique (DICT) using high definition (HD) images and high speed video clips. Test results showed the increase in shear capacity of about 30% to 170% of beams made of SFRC with an indication of increase in ductility. FE models are analyzed extensively and validated with the experimental stress-strain behaviours by optimizing the Poisson's ratio, modulus of elasticity, tensile capacity and stress-strain behaviours. FE models showed the same structural response and failure modes as found in experimental investigation. This paper can contribute to the construction industry of Bangladesh about SFRC with reliable experimental data and FE analyses

Neuro-ophthalmologic manifestations of corona virus disease (COVID-19): A case series

Manifold neuro-ophthalmological signs & symptoms have been described in association with corona virus disease 19 (COVID-19). These presenting manifestations probably due to the result of a range of pathophysiological mechanisms throughout the course from acute illness to recovery phase & late recovery phase. Optic nerve dysfunction like optic neuropathy is associated with post COVID-19 infection. In this case series we want to highlight about the course, sequelae & association of optic neuropathy in COVID-19 patients. BSMMU J 2021; 14 (COVID -19 Supplement): 42-4

Analysis of the association between Epstein Barr virus infection and Hodgkin lymphoma

Epstein Barr virus plays an important role in the pathogenesis of Hodgkin lymphoma. However, the frequency of its association in Bangladeshi people has not been widely studied. The aim of this study was to determine the association of Epstein Barr virus association in Hodgkin Lymphoma through detection of Latent Membrane Protein 1 by immunohistochemistry and serum Epstein Barr virus viral capsid antigen IgG antibody titer by serology. This was a cross-sectional study in purposively selected 45 histologically diagnosed cases of Hodgkin lymphoma at Bangabandhu Sheikh Mujib Medical University, Dhaka, during the period of March 2017 to December 2018. Latent membrane protein 1 was positive in 71.1% of cases of Hodgkin lymphoma. Among these positive cases, 96% of cases had significantly raised titer of serum Epstein Barr virus viral capsid antigen IgG antibody (P<0.0001 obtained by Fisher’s Exact test), which had a male predominance. Mixed cellularity classical Hodgkin lymphoma showed the highest positivity. Bangabandhu Sheikh Mujib Medical University Journal 2022;15(4):32-3

Experience in establishing a high-risk biocontainment facility in response to COVID-19 pandemic under resource constrain settings

The health care systems in resource limited countries are facing major challenges in dealing with Coronavirus disease (COVID-19). In Bangladesh, a steady increase in the number of COVID-19 cases since its first report on March 8, 2020, has led to an increased demand for COVID-19 detection facilities throughout the country. The detection of severe acute respiratory syndrome (SARS-CoV-2), the causative organism of COVID-19 and a highly infectious group 3(three) organism, requires a high biocontainment laboratory with a certain standard prerequisite infrastructure. This study describes the necessary steps for establishing and running a COVID-19 laboratory under resource constraint settings. Our experience indicates that, with collaborative efforts, funding, and technical support from locally available expertise, it is feasible to set up an optimally functional biocontainment facility with an acceptable quality performance despite several short comings. BSMMU J 2021; 14 (COVID -19 Supplement): 45-5

Drinking Water Insecurity in Southwest Coastal Bangladesh: How Far to SDG 6.1?

Substantial progress has been seen in the drinking water supply as per the Millennium Development Goals (MDG), but achieving the Sustainable Development Goals (SDG), particularly SGD 6.1 regarding safely managed drinking water with much more stringent targets, is considered as a development challenge. The problem is more acute in low-income water-scarce hard-to-reach areas such as the southwest coastal region of Bangladesh, where complex hydrogeological conditions and adverse water quality contribute to a highly vulnerable and insecure water environment. Following the background, this study investigated the challenges and potential solutions to drinking water insecurity in a water-scarce area of southwest coastal Bangladesh using a mixed-methods approach. The findings revealed that water insecurity arises from unimproved, deteriorated, unaffordable, and unreliable sources that have significant time and distance burdens. High rates of technical dysfunction of the existing water infrastructure contribute to water insecurity as well. Consequently, safely managed water services are accessible to only 12% of the population, whereas 64% of the population does not have basic water. To reach the SDG 6.1 target, this underserved community needs well-functioning readily accessible water infrastructure with formal institutional arrangement rather than self-governance, which seems unsuccessful in this low-income context. This study will help the government and its development partners in implementing SDG action plans around investments to a reliable supply of safe water to the people living in water-scarce hard-to-reach coastal areas

SARS-CoV-2 vaccination modelling for safe surgery to save lives: data from an international prospective cohort study

Background: Preoperative SARS-CoV-2 vaccination could support safer elective surgery. Vaccine numbers are limited so this study aimed to inform their prioritization by modelling. Methods: The primary outcome was the number needed to vaccinate (NNV) to prevent one COVID-19-related death in 1 year. NNVs were based on postoperative SARS-CoV-2 rates and mortality in an international cohort study (surgical patients), and community SARS-CoV-2 incidence and case fatality data (general population). NNV estimates were stratified by age (18-49, 50-69, 70 or more years) and type of surgery. Best- and worst-case scenarios were used to describe uncertainty. Results: NNVs were more favourable in surgical patients than the general population. The most favourable NNVs were in patients aged 70 years or more needing cancer surgery (351; best case 196, worst case 816) or non-cancer surgery (733; best case 407, worst case 1664). Both exceeded the NNV in the general population (1840; best case 1196, worst case 3066). NNVs for surgical patients remained favourable at a range of SARS-CoV-2 incidence rates in sensitivity analysis modelling. Globally, prioritizing preoperative vaccination of patients needing elective surgery ahead of the general population could prevent an additional 58 687 (best case 115 007, worst case 20 177) COVID-19-related deaths in 1 year. Conclusion: As global roll out of SARS-CoV-2 vaccination proceeds, patients needing elective surgery should be prioritized ahead of the general population