The effectiveness of chlorine dioxide gas in portable personal disinfectants to inhibit bacterial growth.

Disinfectants, especially air disinfectants, are necessary to prevent the potential spread of pathogens (bacteria and viruses) in the pandemic era and minimize the spread of pathogens. Some of the commercial disinfectant products that are often used generally contain chlorine dioxide (ClO2) gas. This study tested the effectiveness of two different commercial disinfectants, a liquid stick disinfectant and a powder disinfection card, to carry out the disinfection of pathogenic bacteria in the environment. These two disinfectants were used as a medium for releasing chlorine dioxide gas which has a much stronger bactericidal effect. In the form of liquid stick, ClO2 is more effective in the disinfection process rather than in the form of powder. The effectiveness of the liquid disinfectant in inhibiting the growth of pathogenic bacteria is influenced by the temperature and the area of the open space covered. Considering that the release from both disinfectants used is very small (0.002 ppmv/h), it takes a small area to ensure that the disinfection process runs effectively.

Super-Hydrophilic Leaflike Sn4P3 on the Porous Seamless Graphene-Carbon Nanotube Heterostructure as an Efficient Electrocatalyst for Solar-Driven Overall Water Splitting.

Water splitting using renewable energy resources is an economic and green approach that is immensely enviable for the production of high-purity hydrogen fuel to resolve the currently alarming energy and environmental crisis. One of the effective routes to produce green fuel with the help of an integrated solar system is to develop a cost-effective, robust, and bifunctional electrocatalyst by complete water splitting. Herein, we report a superhydrophilic layered leaflike Sn4P3 on a graphene-carbon nanotube matrix which shows outstanding electrochemical performance in terms of low overpotential (hydrogen evolution reaction (HER), 62 mV@10 mA/cm2, and oxygen evolution reaction (OER), 169 mV@20 mA/cm2). The outstanding stability of HER at least for 15 days at a high applied current density of 400 mA/cm2 with a minimum loss of potential (1%) in acid medium infers its potential compatibility toward the industrial sector. Theoretical calculations indicate that the decoration of Sn4P3 on carbon nanotubes modulates the electronic structure by creating a higher density of state near Fermi energy. The catalyst also reveals an admirable overall water splitting performance by generating a low cell voltage of 1.482 V@10 mA/cm2 with a stability of at least 65 h without obvious degradation of potential in 1 M KOH. It exhibited unassisted solar energy-driven water splitting when coupled with a silicon solar cell by extracting a high stable photocurrent density of 8.89 mA/cm2 at least for 90 h with 100% retention that demonstrates a high solar-to-hydrogen conversion efficiency of ∼10.82%. The catalyst unveils a footprint for pure renewable fuel production toward carbon-free future green energy innovation.

Effect of size variation on microbubble mass transfer coefficient in flotation and aeration processes.

Microbubble technology dramatically raises the efficiency of the flotation and aeration processes of water treatment plants (WTPs), which see extensive use in developed countries. A local institution, Indonesia Water Institute, has tried to investigate microbubble technology intended for lab-scale WTP. However, the current reactor system does not yet meet the microbubble criteria, especially as it has had few investigations of its abilities in flotation and aeration. This study aims to analyze the effect of size variations that affect the rising velocity and mass transfer coefficient (kLa) of aeration contact time. Three local spargers were used to produce microbubbles. Bubble diameters were measured optically and analyzed using ImageJ software. The dissolved oxygen (DO) concentration was measured every minute using an automated sensor so that the kLa could be determined. Of the three spargers, the smallest bubble size was produced by the vortex type with an average bubble diameter of 89 µm and the slowest rising velocity of 17.67 m/h. It also yielded the highest kLa of 0.297/min, which gave an aeration contact time of 3.64 minutes. The experimental uses of three local spargers revealed that the smaller the microbubble diameter, the higher the mass transfer coefficient in flotation and aeration processes. This research can be the basis for developing microbubble technology for WTP in Indonesia.

Urethrocutaneous fistula: a rare presentation of penile tuberculosis.

A man in his 50s presented with two urethrocutaneous fistulae with intermittent dribbling of urine from the opening of fistula on the surface of glans penis. A skin biopsy from indurated margin of fistula was suggestive of fibrosing granulomatous reaction. Anti-tubercular therapy was given with a diagnosis of penile tuberculosis and there was 50% improvement within two months of treatment.

A 35-year old woman with productive cough and breathlessness.

A 35-year-old lady was seen in the outpatient clinic owing to fever, cough with mucopurulent expectoration, and breathlessness for the duration of 1 month. She had history of similar episodes treated with antibiotics four times during last 2 years. There was no history of recurrent sinusitis, diarrhea, and skin or soft tissue infection. She had no history of diabetes mellitus or steroid intake. She denied any history of facial trauma or dental infection in the past. There was no history of tuberculosis in her or in the family. Radiograph and CT scan of the chest revealed right upper lobe consolidation. Flexible fibreoptic bronchoscopy revealed multiple nodules at opening of right upper lobe bronchus. This clinicopathological conference describes the details of differential diagnoses, difficulties in achieving the final diagnosis and management of such patient.

HIV-related stigma in rural and tribal communities of Maharashtra, India.

Stigma is a recognized barrier to early detection of HIV and causes great suffering for those affected. This paper examines HIV-related stigma in rural and tribal communities of Maharashtra, an area of relatively high HIV prevalence in India. The study used a mix of qualitative and quantitative methods to compare adult women and adolescents in a rural area, women in a rural area, and women in a tribal area. The respondents included 494 married women and 186 adolescents in a rural community and 49 married women in six tribal villages. HIV-related stigma was prevalent in all communities and was the highest among tribal and older respondents. High-risk behaviour was reported in both areas, accompanied with denial of personal risk. Our findings suggest that HIV may be spreading silently in these communities. To our knowledge, this is the first community-based study to make an in-depth assessment of HIV-related stigma in rural and tribal areas of India. By situating our findings within the broader discourse on stigma in the national and state-level data, this study helps explain the nature and persistence of stigma and how to address it more effectively among subcultural groups in India.

HIV-related stigma among South Asians in Toronto.

OBJECTIVES: This paper explores the nature of HIV-related stigma among South Asians in Toronto, its consequences for people living with it and its role in determining access to HIV services. DESIGN: The study is based on data from four focus group discussions with members of an HIV outreach organization, HIV-positive men and women, and women of different ages from the mainstream South Asian community. The questions were adapted from the Explanatory Model Interview Catalog that has been widely used to assess health-related stigma. RESULTS: HIV-related stigma was found to be high in Toronto's South Asian community. Respondents perceived it to be greater among South Asians than in other Canadian communities. South Asian families were said to harbor the most stigma, often rejecting HIV-positive members. Differences were noted between first- and second-generation South Asian migrants in knowledge about, and stigma toward, HIV. Women living with HIV were found to be particularly disadvantaged and stigmatized. Because of stigma, many people living with HIV concealed their illness and avoided HIV-related services. CONCLUSION: Major gaps in knowledge about HIV among Canadian South Asians, and a considerable amount of stigma against people living with HIV, were found. The implications of stigma were highly problematic for people living with HIV, impeding access to services and social support. The paper concludes with recommendations to address stigma, based on suggestions from the study's participants.