Experimental and computational study of metal oxide nanoparticles for the photocatalytic degradation of organic pollutants: a review.

Photocatalysis is a more proficient technique that involves the breakdown or decomposition of different organic contaminants, various dyes, and harmful viruses and fungi using UV or visible light solar spectrum. Metal oxides are considered promising candidate photocatalysts owing to their low cost, efficiency, simple fabricating method, sufficient availability, and environment-friendliness for photocatalytic applications. Among metal oxides, TiO2 is the most studied photocatalyst and is highly applied in wastewater treatment and hydrogen production. However, TiO2 is relatively active only under ultraviolet light due to its wide bandgap, which limits its applicability because the production of ultraviolet is expensive. At present, the discovery of a photocatalyst of suitable bandgap with visible light or modification of the existing photocatalyst is becoming very attractive for photocatalysis technology. However, the major drawbacks of photocatalysts are the high recombination rate of photogenerated electron-hole pairs, the ultraviolet light activity limitations, and low surface coverage. In this review, the most commonly used synthesis method for metal oxide nanoparticles, photocatalytic applications of metal oxides, and applications and toxicity of different dyes are comprehensively highlighted. In addition, the challenges in the photocatalytic applications of metal oxides, strategies to suppress these challenges, and metal oxide studied by density functional theory for photocatalytic applications are described in detail.

Healthcare Waste Segregation Practice and Associated Factors among Healthcare Professionals Working in Public and Private Hospitals, Dire Dawa, Eastern Ethiopia.

Background: The key to the effective management of healthcare wastes is the segregation of the waste at the point of generation; no matter what final strategy for the treatment and disposal of wastes is selected, it is critical that waste streams are separated. Objective: The aim of the study is to assess the practice of healthcare waste segregation and associated factors among healthcare workers at public and private hospitals in Dire Dawa, Eastern Ethiopia. Methods: An institution-based cross-sectional study was conducted among 280 healthcare workers from public and private hospitals. Data were collected through self-administered structured questionnaires and observation checklists. Bivariate and multivariable logistic regression were used to identify factors associated with the practice of healthcare workers using SPSS (Statistical Package for Social Sciences) version 25. Results: This study showed that 56.4% (95% CI: 43.7-60.2) study participants had good healthcare waste segregation practices. Working in a public hospital (AOR = 0.09, 95% CI: (0.03-0.23)), working less than 40 hours a week (AOR = 4.28, 95% CI: (2.11-8.68)), adequate knowledge on healthcare waste management (AOR = 2.42, 95% CI: (1.27-4.61)), ever trained on waste management ((AOR = 2.74, 95% CI: (1.15-6.53)), the presence of guidelines, instructive posters on healthcare waste segregation ((AOR = 8.21, 95% CI: (3.84-17.55)), and availability of color-coded waste bins ((AOR = 9.53, 95% CI: (4.52-20.10)) were factors significantly associated with healthcare waste segregation practices. Conclusion: The study revealed that healthcare waste segregation practices were unacceptably poor. It is very crucial to address the identified factors through ongoing enforcement of healthcare waste management rules and regulations, by providing training, instructive posters around the work area, and making color-coded bins available.

Essential health services delivery status during COVID-19 pandemic in Ethiopia: A national mixed-methods survey of primary healthcare units

BACKGROUND: Essential health services are a package of services critical to improve health outcomes. COVID-19 pandemic disrupts essential health services. However, the level of essential health service disruption due to COVID-19 in Ethiopia is not clear. This study aimed at measuring the status of delivery of essential health services in Ethiopia during COVID-19. METHODS: A national mixed-methods cross-sectional survey was conducted. It was undertaken in Amhara (10 districts), Oromia (eight districts), Sidama (six districts), Southern Nations, Nationalities, and People's Region (16 districts), and Dire Dawa City Administration. A total of 452 health facilities were surveyed. Data were collected using face-to-face interview. Descriptive analysis was undertaken. Qualitative data was analyzed thematically. RESULTS: The woredas (districts) and health facilities which adopted essential health services before the COVID-19 pandemic were 81.4% and 51.2%, respectively. Nearly all health centers provided antenatal care services. Blood pressure measuring apparatus and delivery set were available in all health centers. However, only 50% of health centers had radiant warmer. Malnutrition services were provided by 47% of rural health centers. Moreover, a functional incinerator was available in only 41% of health centers. The provision of cardiovascular disease management was at 27.2%. Furthermore, HIV/AIDS treatment was provided by 43.5% of health facilities. CONCLUSION: The adoption of lists of essential health services was optimal. The status of delivery of essential health services was high for maternal healthcare. Neonatal care at birth, malnutrition treatment, and cardiovascular disease management were low. The district health system should strive more to maintain essential health services.

Communicable and Non-communicable Diseases Diagnosis and Treatment Service Availability at Primary Health Care Units During COVID-19 Outbreak in Ethiopia.

Background: Non-communicable diseases (NCDs) pose a substantial global health challenge, resulting in an annual death toll of over 15 million individuals aged 30 to 69. Ethiopia, categorized as COVID-19 vulnerable, grapples with NCD treatment challenges. This study aims to assess disease service availability at primary health units in Ethiopia during the pandemic. Methods: A facility-based cross-sectional study was conducted from October to December 2021 across regions, encompassing 452 facilities: 92 health centers, 16 primary hospitals, 344 health posts, and 43 districts. Facility selection, based on consultation with regional health bureaus, included high, medium, and low performing establishments. The study employed the WHO tool for COVID-19 capacity assessment and evaluated services for various diseases using descriptive analysis. Results: Results reveal service disruptions in the past year: hospitals (55.6%), health centers (21.7%), districts (30.2%), and health posts (17.4%). Main reasons were equipment shortages (42%), lack of skilled personnel (24%), and insufficient infection prevention supplies (18.8%). While tuberculosis treatment was fully available in 23% of health posts and malaria services in 65.7%, some health centers lacked HIV/AIDS, cardiovascular, mental health, and cervical cancer services. Most communicable and non-communicable disease diagnoses and treatments were fully accessible at primary hospitals, except for cervical cancer (56.3%) and mental health (62.5%) services. Conclusion: Significant gaps exist in expected services at primary health units. Improving disease care accessibility necessitates strengthening the supply chain, resource management, capacity building, and monitoring systems.

Barriers Towards Obstetric Care Service Utilization in Ethiopia: An Explorative Qualitative Study.

Background: Obstetric care has been at the center of both global and national agendas. More than 50% of pregnant mothers are still preferring to give birth at home with some even after having full antenatal care. However, a few literatures looked at contributing factors for this problem but they are not conclusive and do not consider different sociocultural context of Ethiopia and different health service related barriers. Hence, the aim of this study was to explore barriers to obstetric care service utilization in Ethiopia using the socio-ecological model. Methods: Explorative qualitative study was employed involving key-informant interviews, in-depth interviews, and focus group discussions between October and December 2021; Individual, community, health system, and contextual barriers were explored. Atlas ti. Version 9 was used for analysis. Result: Lack of awareness, unfavorable perception, lack of partner involvement, cultural barrier, shortage of supplies, poor infrastructure, provider-related factors, poor monitoring, and evaluation system, challenging topography, and conflict were the major barriers that hinder mothers from receiving obstetrics service in Ethiopia. Conclusion: Lack of awareness, unfavorable perception, conflict, problems with health system structure and process, and cultural and geographical conditions were major barriers in Ethiopia. Therefore, packages of intervention is important to avail essential equipment, strengthening follow up system, create awareness, and increase access to health facilities is very important for service improvement by the government and non-governmental organizations. Additionally, implementing conflict resolution mechanism is important for addressing better obstetric service.

Essential Health Services Delivery Status During COVID-19 Pandemic in Ethiopia: A National Mixed-Methods Survey of Primary Healthcare Units.

Background: Essential health services are a package of services critical to improve health outcomes. COVID-19 pandemic disrupts essential health services. However, the level of essential health service disruption due to COVID-19 in Ethiopia is not clear. This study aimed at measuring the status of delivery of essential health services in Ethiopia during COVID-19. Methods: A national mixed-methods cross-sectional survey was conducted. It was undertaken in Amhara (10 districts), Oromia (eight districts), Sidama (six districts), Southern Nations, Nationalities, and People's Region (16 districts), and Dire Dawa City Administration. A total of 452 health facilities were surveyed. Data were collected using face-to-face interview. Descriptive analysis was undertaken. Qualitative data was analyzed thematically. Results: The woredas (districts) and health facilities which adopted essential health services before the COVID-19 pandemic were 81.4% and 51.2%, respectively. Nearly all health centers provided antenatal care services. Blood pressure measuring apparatus and delivery set were available in all health centers. However, only 50% of health centers had radiant warmer. Malnutrition services were provided by 47% of rural health centers. Moreover, a functional incinerator was available in only 41% of health centers. The provision of cardiovascular disease management was at 27.2%. Furthermore, HIV/AIDS treatment was provided by 43.5% of health facilities. Conclusion: The adoption of lists of essential health services was optimal. The status of delivery of essential health services was high for maternal healthcare. Neonatal care at birth, malnutrition treatment, and cardiovascular disease management were low. The district health system should strive more to maintain essential health services.

COVID-19 Infection Prevention Preparedness, Practices and Case Management in the Primary Health Care Units in Ethiopia.

Background: COVID-19 as pandemic declared by WHO on March 11, 2020 and first case detected in Ethiopia on March 13/2020. The COVID-19 caused a global crisis, including millions of lives lost, public health systems in shock and economic and social disruption. Strategies depend on how an existing health system is organized. Even though public health emergency operation centers of the Ethiopia switched to emergency response, there is no national evidence about infection prevention and control. Therefore, this project aimed to assess the level of infection prevention and control and management of COVID- 19 in Ethiopia, 2021. Methods: The cross-sectional study conducted at four regions and one city (Amhara, Oromia, SNNPR, Sidama Region, and Dire Dawa). Being with zonal health departments and woredas health offices, primary health care units were selected. The data were collected electronically through Kobocollect software from November 08-28/2021. Descriptive analysis like frequency and percentage was conducted by SPSS software version 25 and the results were presented by tables, figures and narration. Results: Data were collected from 16 hospitals, 92 health centers, and 344 health posts. All hospitals have designated COVID-19 focal person. There were significant number of woredas and PHCUs who didn't have IPC guidelines and protocols. About 11 woredas had no any type of diagnostic tests for COVID-19. Conclusions: The study revealed that there were significant gaps on Infection prevention and control practice, shortage of personal protective equipment, isolation and specimen transportation problem, lack of call centers. We recommend concerned bodies to fill the identified gaps.

Availability of Maternal, Newborn care and Child Health Services at Primary Health Care Unit during COVID-19 Outbreak in Ethiopia.

Background: The COVID-19 pandemic is putting a pressure on global health systems. The disruption of essential health services (EHS) has an impact on the health of mothers, neonate and children in developing countries. Therefore, the main aim of this study was assessing the availability of Maternal, Newborn care and Child health (MNCHS) services at primary health care unit during COVID-19 outbreak. Methods: A cross-sectional survey was conducted in five regions of Ethiopia in 2021. Descriptive analyses were undertaken using STATA 16 software and the results presented using tables and different graphs. A continuity of EHS assessment tool adopted from WHO was used for data collection. Result: During COVID -19 pandemic, 30 (69.8%) of woreda health offices, 52 (56.5%) of health centers (HCs), 7 (44.4%) of hospitals, and 165 (48%) of health posts (HPs) had a defined list of EHS. In comparison with other EHS, family planning is the least available service in all regions. At HPs level care for sick children and antenatal care (ANC) were available at 59.1 and 58.82% respectively. Except immunization services at SNNP, all other maternal, newborn, and child health EHS were not available to all HPs at full scale. Conclusion: Immunization services were most available, while ANC and care for sick children were least available during COVID-19 at the HPs level. There was regional variation in MNCH EHS service availability at all levels.

Assessment of Availability of Tracer Drugs and Basic Diagnostics at Public Primary Health Care Facilities in Ethiopia During COVID-19 Pandemic.

Background: The emergence of COVID-19 pandemic has disrupted the supply chain and stock of medicines and drugs across the globe. Tracer drugs are essential medicines that address the population's priority health problems. Thus, this study aimed to assess availability of tracer drugs and basic diagnostics at public primary health care facilities in Ethiopia. Methods: Facility based cross-sectional study was employed in four regions and one city administration. The primary health care units (PHCUs) were purposively selected in consultation with respective regional health bureaus. Finally, 16 hospitals, 92 health centers and 344 health posts were included. This study adopted WHO's tool that was being used to rapidly assess the capacity of health facilities to maintain the provision of essential health services during the COVID-19. Descriptive analysis was done using frequency and percentage, and results were presented. Results: The overall mean availability of tracer drugs in PHCUs was 77.6%. Only 2.8% of PHCUs have all tracer drugs. The mean availability of basic diagnostic at national level was 86.6% in PHUs except health posts where it was less. Health facilities with all basic diagnostic services was 53.7%. Of the total 344 health posts assessed, 71% were providing diagnostic testing for malaria using either laboratory equipment or rapid diagnostic test (RDT) while 43% provide urine test for the pregnancy. Conclusion: This study shows availability of all tracer drugs in PHCUs in Ethiopia was extremely low. There was regional variation in availability of tracer drugs and basic diagnostics. It is very crucial to increase availability of tracer drugs and diagnostics. Drugs and diagnostic materials should be supplied according to the capacity and location of health facilities.

Identifying surface degradation, mechanical failure, and thermal instability phenomena of high energy density Ni-rich NCM cathode materials for lithium-ion batteries: a review.

Among the existing commercial cathodes, Ni-rich NCM are the most promising candidates for next-generation LIBs because of their high energy density, relatively good rate capability, and reasonable cycling performance. However, the surface degradation, mechanical failure and thermal instability of these materials are the major causes of cell performance decay and rapid capacity fading. This is a huge challenge to commercializing these materials widely for use in LIBs. In particular, the thermal instability of Ni-rich NCM cathode active materials is the main issue of LIBs safety hazards. Hence, this review will recapitulate the current progress in this research direction by including widely recognized research outputs and recent findings. Moreover, with an extensive collection of detailed mechanisms on atomic, molecular and micrometer scales, this review work can complement the previous failure, degradation and thermal instability studies of Ni-rich NMC. Finally, this review will summarize recent research focus and recommend future research directions for nickel-rich NCM cathodes.

Preparedness toward COVID-19 pandemics and associated factors among health care workers in Dire Dawa Hospitals, Eastern Ethiopia: A facility-based cross-sectional study.

INTRODUCTION: Health care workers are at the frontline of the response against the COVID-19 outbreak. Poor preparedness and infection prevention practices among health care workers compound the hazard and occurrence of COVID-19 hospital transmission. Thus, the study aimed to assess preparedness toward COVID-19 pandemics and associated factors among health care workers in Hospitals of Eastern Ethiopia. METHODS: Facility-based cross-sectional study was conducted from 20 June to July 10 2020. A simple random sampling technique was used to select 423 health care workers. Data were collected using a structured self-administered questionnaire and analyzed using SPSS Version 23. Bivariate and multivariable logistic regression was conducted to identify factors associated with the outcome variable, and statistical significance was declared at a p-value less than 0.05. RESULTS: This study revealed that the proportion of health care workers' preparedness toward the COVID-19 pandemic was 40.9% (95% CI: 36.2-45.9). Working in a public hospital (AOR = 2.7, 95% CI: 1.6-4.3), being unafraid of transmitting COVID-19 to patients (Adjusted odds ratio/AOR = 4.6, 95% CI: 2.2-10.0), feeling safe at the workplace (AOR = 3.3, 95% CI: 1.7-6.4)), satisfied with the infection control policy (AOR = 6.0, 95% CI: 2.3-15.0), and not feeling anxious about the likelihood of COVID-19 spread (AOR = 2.1, 95% CI: 1.3-3.4) were significantly associated with COVID-19 preparedness. CONCLUSION: The majority of the health care workers were not prepared for COVID-19 pandemics. Feeling safe at the workplace scared of transmitting COVID-19 to patients, satisfied with the infection control policy, and feeling anxious concerning the likelihood of COVID-19 were factors associated with health care workers' preparedness to COVID-19. The current awareness creation training, including motivational and psychological preparation for all health care workers, is mandatory, regardless of their profession or working place.

Yield Response and Nutrient Use Efficiencies under Different Fertilizer Applications in Maize (Zea mays L.) In Contrasting Agro Ecosystems.

Variability in crop response and nutrient use efficiencies to fertilizer application is quite common under varying soil and climatic conditions. Understanding such variability is vital to develop farm- and area- specific soil nutrient management and fertilizer recommendations. Hence the objectives of this study were to assess maize grain yield response to nutrient applications for identifying yield-limiting nutrients and to understand the magnitude of nutrient use efficiencies under varying soil and rainfall conditions. A total of 150 on-farm nutrient omission trials (NOTs) were conducted on farmers' field in high rainfall and moisture stress areas. The treatments were control, PK, NK, NP, NPK and NPK+ secondary and micronutrients. Maize grain yield, nutrient uptake, agronomic and recovery efficiencies of N and P differed between fertilizer treatments and between the contrasting agro-ecologies. The AEN ranged from 24.8 to 32.5 kg grain kg-1 N in Jimma area and from 1.0 kg grain kg-1 N (NK treatment) to 10.2 kg grain kg-1 N (NPK treatment) at Adami Tullu and from 0.1 kg grain kg-1 N (NK treatment) to 8.3 kg grain kg-1 N (NPK treatment) at Bulbula. The differing parameters between the agro-ecologies were related to difference in rainfall amount and not to soil factors. Grain yield response to N application and agronomic efficiencies of N and P were higher in the high rainfall area than in the moisture stress areas. Grain yield responded the most to nitrogen (N) application than to any other nutrients at most of the experimental sites. Owing to the magnificent yield response to N fertilizer in the current study, proper management of nitrogen is very essential for intensification of maize productivity in most maize growing areas of Ethiopia.

Effects of thermal annealing on Pt-shell/MgO-core nanowires.

We have reported the preparation of Pt-coated MgO nanowires and investigated changes in the structural and photoluminescence (PL) characteristics resulting from application of a thermal annealing process. Scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM), and energy-dispersive X-ray spectroscopy (EDX) have been used to characterize the samples. The shell layer was transformed to Pt nanoparticles by thermal annealing at 800 degrees C. We have studied the effects of Pt-coating and thermal annealing on the PL emission of the products. This approach will offer a potentially useful and novel route for the fabrication of a variety of metal nanoparticles on core nanowires.

Fabrication of gold nanotubes from removable MgO nanowires templates.

We have prepared MgO/Au core-shell nanowires, subsequently demonstrating the fabrication of Au nanotubes by using MgO nanowires as a sacrificial template. The samples were characterized by scanning electron microscopy, X-ray diffraction, transmission electron microscopy, and energy-dispersive X-ray spectroscopy. MgO nanowires were coated with a conformal layer of Au via sputtering. By etching away the MgO core in aqueous (NH3)2SO4 solution, hollow nanotube-like structures of Au were readily obtained. This approach offers a potentially useful route for the fabrication of a variety of hollow metallic structures.