bluuebunny/crossref_metadata_2025 huggingface dataset:
The Equivalent Effect of Initial Condition Coupling on the Laminar Burning Velocity of Natural Gas Diluted by CO2
Authors: Wu Xueshun , Wang Peng , Zhu Zhennan , Qian Yunshou , Yu Wenbin , Han Zhiqiang
Published: February 2021

Initial temperature has a promoting effect on laminar burning velocity, while initial pressure and dilution rate have an inhibitory effect on laminar burning velocity. Equal laminar burning velocities can be obtained by initial condition coupling with different temperatures, pressures and dilution rates. This paper analysed the equivalent distribution pattern of laminar burning velocity and the variation pattern of an equal weight curve using the coupling effect of the initial pressure (0.1–0.3 MPa), initial temperature (323–423 K) and dilution rate (0–16%). The results show that, as the initial temperature increases, the initial pressure decreases and the dilution rate decreases, the rate of change in laminar burning velocity increases. The equivalent effect of initial condition coupling can obtain equal laminar burning velocity with an dilution rate increase (or decrease) of 2% and an initial temperature increase (or decrease) of 29 K. Moreover, the increase in equivalence ratio leads to the rate of change in laminar burning velocity first increasing and then decreasing, while the increases in dilution rate and initial pressure make the rate of change in laminar burning velocity gradually decrease and the increase in initial temperature makes the rate of change in laminar burning velocity gradually increase. The area of the region, where the initial temperature influence weight is larger, gradually decreases as the dilution rate increases, and the rate of decrease gradually decreases.
Diffuser Total Efficiency Using Generalized Actuator Disc Model and Its Maximization Method
Authors: Yoshida Shigeo , Motoyama Masataka , Jamieson Peter , Matsuoka Koij
Published: February 2021

The diffuser total efficiency was formulated and defined based on the generalized actuator disc model for the index of the efficiency of the diffuser-alone of the diffuser-augmented wind turbines. An optimization method to maximize the diffuser total efficiency was developed using a genetic algorithm and axisymmetric computational fluid dynamics. A case study was conducted for a 10% chord-to-diameter ratio, 2% thickness-to-chord plate, and the crest position at 50% chord of the diffuser. The optimal result showed a diffuser total efficiency of 1.087. Furthermore, 1392 (=48 population × 29 generations) simulation cases of the optimization process showed that high diffuser total efficiency appears at a low-drag coefficient, high-lift coefficient, and 15–25% low diffuser height-to-chord ratio.
Laurel Wilt: Current and Potential Impacts and Possibilities for Prevention and Management
Authors: Olatinwo Rabiu O. , Fraedrich Stephen W. , Mayfield Albert E.
Published: February 2021

In recent years, outbreaks of nonnative invasive insects and pathogens have caused significant levels of tree mortality and disturbance in various forest ecosystems throughout the United States. Laurel wilt, caused by the pathogen Raffaelea lauricola (T.C. Harr., Fraedrich and Aghayeva) and the primary vector, the redbay ambrosia beetle (Xyleborus glabratus Eichhoff), is a nonnative pest-disease complex first reported in the southeastern United States in 2002. Since then, it has spread across eleven southeastern states to date, killing hundreds of millions of trees in the plant family Lauraceae. Here, we examine the impacts of laurel wilt on selected vulnerable Lauraceae in the United States and discuss management methods for limiting geographic expansion and reducing impact. Although about 13 species belonging to the Lauraceae are indigenous to the United States, the highly susceptible members of the family to laurel wilt are the large tree species including redbay (Persea borbonia (L.) Spreng) and sassafras (Sassafras albidum (Nutt.) Nees), with a significant economic impact on the commercial production of avocado (Persea americana Mill.), an important species native to Central America grown in the United States. Preventing new introductions and mitigating the impact of previously introduced nonnative species are critically important to decelerate losses of forest habitat, genetic diversity, and overall ecosystem value.
Research Professors’ Self-Assessment of Competencies
Authors: Torres Delgado Gabriela , Hernández-Gress Neil
Published: February 2021

Research professors develop scientific products that impact and benefit society, but their competencies in doing so are rarely evaluated. Therefore, by employing a mixed two-stage sequential design, this study developed a self-assessment model of research professors’ competencies with four domains, seven competencies, and 30 competency elements. Next, we conducted descriptive statistical analysis of those elements. In the first year, 320 respondents rated themselves on four levels: initial, basic, autonomous, and consolidated. In the assessment model’s second year, we compared 30 respondents’ results with those of their initial self-assessment. The main developmental challenge was Originality and Innovation, which remained at the initial level. Both Training of Researchers and Transformation of Society were at the basic level, and Digital Competency was at the autonomous level. Both Teaching Competence and Ethics and Citizenship attained the consolidated level. This information helps establish priorities for accelerating researchers’ training and the quality of their research.
Natural β-Carotene Production by Blakeslea trispora Cultivated in Spanish-Style Green Olive Processing Wastewaters
Authors: Papadaki Eugenia , Mantzouridou Fani Th
Published: February 2021

In the current research, the potential of Spanish-style green olive processing wastewaters (lye and washing waters) exploitation toward natural β-carotene production by Blakeslea trispora was tested for the first time. Mating culture generated by the joint cultivation of the heterothallic fungal strains ATCC 14271 and 14272 in the non-sterile lye and washing waters was able to grow, achieving the phytotoxic hydroxytyrosol degradation by 57.3% and 66.8%, respectively. However, the low sugar and nitrogen content of the streams did not favor carotenogenesis. Alternatively, in the nutrient-enriched effluents, a notable quantity of β-carotene was produced, accounted for 61.2 mg/L (lye) and 64.1 mg/L (washing waters) (82–88% of total carotenoid content). Above all, enriched streams had a noteworthy stimulating effect on the β-carotene synthesis, because both the maximum β-carotene yield per volume of enriched effluents and specific β-carotene production rate were higher when compared with the respective values obtained from trials with synthetic reference medium without added effluents. Hydroxytyrosol and tyrosol showed high stability during the non-sterile process for β-carotene production by B. trispora grown in the enriched effluents. This finding strengthens the potential toward the generation of multiple high-value products, which could lower the natural β-carotene production costs.
The Effects of the Combination of Buckwheat D-Fagomine and Fish Omega-3 Fatty Acids on Oxidative Stress and Related Risk Factors in Pre-Obese Rats
Authors: Miralles-Pérez Bernat , Nogués Maria Rosa , Sánchez-Martos Vanessa , Taltavull Núria , Méndez Lucía , Medina Isabel , Ramos-Romero Sara , Torres Josep L. , Romeu Marta
Published: February 2021

The combined supplementation of buckwheat D-fagomine (FG) and fish omega-3 polyunsaturated fatty acids (ω-3 PUFA) attenuates the development of insulin resistance in rats fed a high-fat (HF) diet. This study aimed to examine the effects of combined supplementation with FG and ω-3 PUFA on dyslipidemia, transaminases, interleukin-6, and oxidative stress. Forty-five male Sprague-Dawley rats were fed a standard diet, an HF diet, an HF diet supplemented with FG, an HF diet supplemented with ω-3 PUFA, or an HF diet supplemented with FG and ω-3 PUFA for 21 weeks. Triacylglycerol, cholesterol, aspartate aminotransferase, alanine aminotransferase, and interleukin-6 were measured. The assessment of oxidative stress included plasma antioxidant capacity, antioxidant enzyme activities, glutathione content, lipid peroxidation, and protein carbonylation. The combined supplementation with FG and ω-3 PUFA did not attenuate the slight accumulation of liver cholesterol induced by the HF diet but normalized the plasma alanine aminotransferase activity. Rats fed the HF diet supplemented with the combination showed a lower amount of plasma interleukin-6 than those fed a standard diet. The combination attenuated oxidative damage induced by the HF diet, decreased antioxidant enzyme activities, and enhanced glutathione status. The beneficial effects of the combination of FG and ω-3 PUFA on oxidative stress and related risk factors in pre-obese rats were mainly modulated by ω-3 PUFA.
Identification and Functional Analysis of ThADH1 and ThADH4 Genes Involved in Tolerance to Waterlogging Stress in Taxodium hybrid ‘Zhongshanshan 406’
Authors: Xuan Lei , Hua Jianfeng , Zhang Fan , Wang Zhiquan , Pei Xiaoxiao , Yang Ying , Yin Yunlong , Creech David L.
Published: February 2021

The Taxodium hybrid ‘Zhongshanshan 406’ (T. hybrid ‘Zhongshanshan 406’) [Taxodium mucronatum Tenore × Taxodium distichum (L.). Rich] has an outstanding advantage in flooding tolerance and thus has been widely used in wetland afforestation in China. Alcohol dehydrogenase genes (ADHs) played key roles in ethanol metabolism to maintain energy supply for plants in low-oxygen conditions. Two ADH genes were isolated and characterized—ThADH1 and ThADH4 (GenBank ID: AWL83216 and AWL83217—basing on the transcriptome data of T. hybrid ‘Zhongshanshan 406’ grown under waterlogging stress. Then the functions of these two genes were investigated through transient expression and overexpression. The results showed that the ThADH1 and ThADH4 proteins both fall under ADH III subfamily. ThADH1 was localized in the cytoplasm and nucleus, whereas ThADH4 was only localized in the cytoplasm. The expression of the two genes was stimulated by waterlogging and the expression level in roots was significantly higher than those in stems and leaves. The respective overexpression of ThADH1 and ThADH4 in Populus caused the opposite phenotype, while waterlogging tolerance of the two transgenic Populus significantly improved. Collectively, these results indicated that genes ThADH1 and ThADH4 were involved in the tolerance and adaptation to anaerobic conditions in T. hybrid ‘Zhongshanshan 406’.
Phenotypic Response to Light Versus Shade Associated with DNA Methylation Changes in Snapdragon Plants (Antirrhinum majus)
Authors: Mouginot Pierick , Luviano Aparicio Nelia , Gourcilleau Delphine , Latutrie Mathieu , Marin Sara , Hemptinne Jean-Louis , Grunau Christoph , Pujol Benoit
Published: February 2021

The phenotypic plasticity of plants in response to change in their light environment, and in particularly, to shade is a schoolbook example of ecologically relevant phenotypic plasticity with evolutionary adaptive implications. Epigenetic variation is known to potentially underlie plant phenotypic plasticity. Yet, little is known about its role in ecologically and evolutionary relevant mechanisms shaping the diversity of plant populations in nature. Here we used a reference-free reduced representation bisulfite sequencing method for non-model organisms (epiGBS) to investigate changes in DNA methylation patterns across the genome in snapdragon plants (Antirrhinum majus L.). We exposed plants to sunlight versus artificially induced shade in four highly inbred lines to exclude genetic confounding effects. Our results showed that phenotypic plasticity in response to light versus shade shaped vegetative traits. They also showed that DNA methylation patterns were modified under light versus shade, with a trend towards global effects over the genome but with large effects found on a restricted portion. We also detected the existence of a correlation between phenotypic and epigenetic variation that neither supported nor rejected its potential role in plasticity. While our findings imply epigenetic changes in response to light versus shade environments in snapdragon plants, whether these changes are directly involved in the phenotypic plastic response of plants remains to be investigated. Our approach contributed to this new finding but illustrates the limits in terms of sample size and statistical power of population epigenetic approaches in non-model organisms. Pushing this boundary will be necessary before the relationship between environmentally induced epigenetic changes and phenotypic plasticity is clarified for ecologically relevant mechanisms with evolutionary implications.
Proton Therapy for Mandibula Plate Phantom
Authors: Senirkentli Güler Burcu , Ekinci Fatih , Bostanci Erkan , Güzel Mehmet Serdar , Dağli Özlem , Karim Ahmad M. , Mishra Alok
Published: February 2021

Purpose: In this study, the required dose rates for optimal treatment of tumoral tissues when using proton therapy in the treatment of defective tumours seen in mandibles has been calculated. We aimed to protect the surrounding soft and hard tissues from unnecessary radiation as well as to prevent complications of radiation. Bragg curves of therapeutic energized protons for two different mandible (molar and premolar) plate phantoms were computed and compared with similar calculations in the literature. The results were found to be within acceptable deviation values. Methods: In this study, mandibular tooth plate phantoms were modelled for the molar and premolar areas and then a Monte Carlo simulation was used to calculate the Bragg curve, lateral straggle/range and recoil values of protons remaining in the therapeutic energy ranges. The mass and atomic densities of all the jawbone layers were selected and the effect of layer type and thickness on the Bragg curve, lateral straggle/range and the recoil were investigated. As protons move through different layers of density, lateral straggle and increases in the range were observed. A range of energies was used for the treatment of tumours at different depths in the mandible phantom. Results: Simulations revealed that as the cortical bone thickness increased, Bragg peak position decreased between 0.47–3.3%. An increase in the number of layers results in a decrease in the Bragg peak position. Finally, as the proton energy increased, the amplitude of the second peak and its effect on Bragg peak position decreased. Conclusion: These findings should guide the selection of appropriate energy levels in the treatment of tumour structures without damaging surrounding tissues.
Looking Ahead: Health Impact Assessment of Front-of-Pack Nutrition Labelling Schema as a Public Health Measure
Authors: Feteira-Santos Rodrigo , Alarcão Violeta , Santos Osvaldo , Virgolino Ana , Fernandes João , Vieira Carlota Pacheco , João Gregório Maria , Nogueira Paulo , Costa Andreia , Graça Pedro
Published: February 2021

This study aimed to describe the underlying process, used methods and major recommendations emerging from a comprehensive and prospective health impact assessment of the endorsement of a front-of-pack nutrition labelling (FOP-NL) system by the Portuguese health authorities. A mixed-methods approach was used to gather information on the impact of four FOP-NL schemes on consumers’ selection of food products according to the perception of their nutritional quality, combining a systematic literature review, focus groups (FG), in-depth individual interviews, and an open-label crossover randomized controlled study. The relevance of FOP-NL as a public health promotion policy has emerged as a consensual idea among either FGs’ participants (i.e., consumers and experts), or interviewed stakeholders. Although all of the evaluated FOP-NLs result better than no system on promoting the choice of the healthiest product, the effectiveness of easy-to-interpret FOP-NL among vulnerable groups raised concerns related to the need of integrating specific nutritional information to promote a better self-management of chronic diseases, and related to the level of literacy of consumers, which could impair the usage of FOP-NL. Educational campaigns addressing skills to use FOP-NL is recommended. Furthermore, a monitoring strategy should be considered to evaluate the long-term effectiveness of this policy in promoting healthier food choices, and in reducing diet-related non-communicable diseases burden.
A Systematic Review of the Prevalence of Gestational Diabetes in Norway
Authors: Behboudi-Gandevani Samira , Parajuli Ranjan , Vaismoradi Mojtaba
Published: February 2021

Gestational diabetes mellitus (GDM) is a major public health problem and a threat to maternal and child health. There is a lack of integrated and systematically synthesized knowledge about the prevalence GDM in Norway. Therefore, this systemic review aimed to present the best available peer-reviewed published evidence from the past 20 years about the prevalence of GDM in Norway. A comprehensive literature search was performed on online databases consisting of PubMed (including Medline), Web of Science, and Scopus to retrieve original research articles published on the prevalence of GDM up to August 2020. Also, databases of Norart and SveMed+ in the Norwegian language were searched to enhance the search coverage. Data were extracted using a standardized protocol and data collection form and were presented narratively. A total of 11 studies were selected to include for data analysis and synthesis with the total sample size of 2,314,191 pregnant women. The studies included heterogenous populations and mostly reported the prevalence of GDM in healthy mothers with singleton pregnancies. The prevalence of GDM in population registered-based studies in Norway was reported to be lower than 2%, using the World Health Organization (WHO) 1999 criteria. However, studies on high-risk populations such as the non-European ethnicity reported prevalence rates ranging from 8% to 15%. Given the evidence from available literature that reported trends in the prevalence of GDM, an increase in the prevalence of GDM across most racial/ethnic groups studied in Norway was observed. Overall, the prevalence of GDM in the low risk population of Norway is fairly low, but the available literature supports the perspective that the prevalence of GDM has shown an increasing trend in recent decades. This finding is very important for health service planning and evaluation, policy development, and research in Norway. Large-scale prospective studies, using the national data, are warranted to provide firm evidence over coming years. Our review findings can help policy makers devise appropriate strategies for improving women’s reproductive health.
Bite Force in Elderly with Full Natural Dentition and Different Rehabilitation Prosthesis
Authors: Manzon Licia , Vozza Iole , Poli Ottavia
Published: February 2021

(1) Background: This study aimed to investigate maximum bite force (MBF) in elderly patients with natural full dentition (FD), patients rehabilitated with Traditional Complete Dentures (CD), with overdentures (IRO) and edentulous patients (ED). We also tested whether MBF changes are associated with gender, age of the patients and body mass index (BMI) as result of altered food; (2) Methods: Three hundred and sixty-eight geriatric patients were included. We studied two types of prostheses: (a) IRO with telescopic attachments. (b) CD (heat polymerized polymethyl methacrylate resin). The MBF was measured using a digital dynamometer with a bite fork; (3) Results: We found that MBF is higher in males than females, regardless of teeth presence or absence (p < 0.01). In patients with CD or IRO, there are no differences between males and females; prostheses improve MBF compared to edentulous patients (p < 0.0001) and this effect is greater with IRO prostheses (p < 0.0001); the chewing force of FD subjects remains greater (p < 0.0001); there are no differences among chewing strength based on different BMI categories, although FD subjects have a reduced incidence of obesity; there is a significant negative correlation between MBF and age (p = 0.038; R = 0.145), and no correlation between MBF and BMI; (4) Conclusions: This study showed that MBF improves more in patients using IRO prostheses, although not reaching the MBF of FD subjects. MBF does not correlate with BMI, although we found increased percentages of obesity in edentulous subjects or those with prostheses. Thus, old people wearing prostheses require special attention by a nutritionist to avoid risk of malnutrition.
Ecological Network Optimization in Urban Central District Based on Complex Network Theory: A Case Study with the Urban Central District of Harbin
Authors: Song Shuang , Xu Dawei , Hu Shanshan , Shi Mengxi
Published: February 2021

Habitat destruction and declining ecosystem service levels caused by urban expansion have led to increased ecological risks in cities, and ecological network optimization has become the main way to resolve this contradiction. Here, we used landscape patterns, meteorological and hydrological data as data sources, applied the complex network theory, landscape ecology, and spatial analysis technology, a quantitative analysis of the current state of landscape pattern characteristics in the central district of Harbin was conducted. The minimum cumulative resistance was used to extract the ecological network of the study area. Optimized the ecological network by edge-adding of the complex network theory, compared the optimizing effects of different edge-adding strategies by using robustness analysis, and put forward an effective way to optimize the ecological network of the study area. The results demonstrate that: The ecological patches of Daowai, Xiangfang, Nangang, and other old districts in the study area are small in size, fewer in number, strongly fragmented, with a single external morphology, and high internal porosity. While the ecological patches in the new districts of Songbei, Hulan, and Acheng have a relatively good foundation. And ecological network connectivity in the study area is generally poor, the ecological corridors are relatively sparse and scattered, the connections between various ecological sources of the corridors are not close. Comparing different edge-adding strategies of complex network theory, the low-degree-first strategy has the most outstanding performance in the robustness test. The low-degree-first strategy was used to optimize the ecological network of the study area, 43 ecological corridors are added. After the optimization, the large and the small ecological corridors are evenly distributed to form a complete network, the optimized ecological network will be significantly more connected, resilient, and resistant to interference, the ecological flow transmission will be more efficient.
Opinions towards Key Operational Aspects for the Implementation of HIV Self-Testing in Spain: A Comparison between Stakeholders and Potential Users
Authors: Hoyos Juan , Guerras Juan-Miguel , Maté Tomás , Agustí Cristina , Fernández-López Laura , Fuente Luis de la , Belza María-José
Published: February 2021

We assessed previous knowledge about the existence of HIV self-testing of stakeholders in Spain, as well as their personal position towards this methodology. We also assessed their views on potential users’ (PU) opinions towards several key operational aspects surrounding self-testing, and compared them to those expressed by a sample of PU comprised of men who have sex with men. In 2017, we recruited three types of stakeholders: public health professionals and policy makers (PHPPM) (n = 33), clinical providers (n = 290) and community-based/non-governmental organization (CBO/NGO) workers (n = 55). Data on PU (n = 3537) were collected in 2016. Previous knowledge about the existence of self-testing was higher in stakeholders than in PU, but being in favor was less frequent. PUs’ willingness to pay 25–30 euros for a self-test was higher than that which stakeholders considered. According to clinical providers and PHPPM, pharmacies would be PUs’ preferred place to obtain a self-test, which was in line with PUs’ actual choice. CBO/NGO workers on the other hand thought it would be CBO/NGOs. PHPPM and clinical providers considered primary care as PUs’ preferred setting to confirm a reactive self-test and CBO/NGO chose CBO/NGOs, but PUs preferred an HIV/STI testing service or clinic. Stakeholders’ opinions significantly differed from those of PUs. This divergence needs to be brought up to stakeholders as it could vary their position towards self-testing as well as the actions taken in the implementation of a testing option with the potential of increasing testing frequency.
Attitudes of Undergraduate Nursing Students towards Patient Safety: A Quasi-Experimental Study
Authors: Cantero-López Nuria , González-Chordá Víctor M. , Valero-Chillerón María Jesús , Mena-Tudela Desirée , Andreu-Pejó Laura , Vila-Candel Rafael , Cervera-Gasch Águeda
Published: February 2021

Improving nursing students’ attitudes towards patient safety is a current and relevant topic. This study aims to evaluate the effectiveness of an educational intervention based on critical incident and root cause analysis (RCA) techniques regarding attitudes towards patient safety in nursing students. A quasi-experimental before and after study was developed between January 2018 and December 2019 in a sample of 100 nursing students at Universitat Jaume I (Spain). The intervention was developed in two phases. Phase I was at university, where students applied the RCA technique in a real case. Phase II took place during clinical practice. Students used critical incidents to identify a risk situation for the patients and applied RCA to detect its root causes. The measurement of attitudes was performed with the Attitudes to Patient Safety Questionnaire (APSQ-III). The global score of the questionnaire in the baseline measurement was 3.911 (±0.335), in the intermediate measurement it was 4.031 (±0.337) and in the final measurement it was 4.052 (±0.335), with significant differences (p = 0.03). However, intra-group differences were observed in the final measurement (p = 0.021). The teamwork dimension had the highest mean score on all three measures and the notification dimension had the lowest mean scores. An educational intervention combining critical incident and RCA techniques can improves nursing students’ attitudes toward patient safety.
Moderating Effects of Structural Empowerment and Resilience in the Relationship between Nurses’ Workplace Bullying and Work Outcomes: A Cross-Sectional Correlational Study
Authors: Kang Heiyoung , Han Kihye
Published: February 2021

This cross-sectional correlational study aimed to evaluate the moderating effects of structural empowerment and resilience in the relationship between workplace bullying and nursing work outcomes. Data were collected from 435 nurses and nurse managers working at a tertiary hospital in Seoul, South Korea. The moderating effects were examined using stepwise hierarchical multiple regression models. The bootstrapping method was utilized to verify the magnitude and significance of the moderating effects. Structural empowerment showed a moderating effect in the relationship between workplace bullying and nursing work outcomes: for the conditional values above the average level of structural empowerment, workplace bullying was significantly associated with nursing work outcomes, while work outcomes were low regardless of workplace bullying for the conditional values less than average. However, resilience had no moderating effect. To improve work outcomes, bullying must be reduced and structural empowerment and resilience increased.
Impact of the COVID-19 Pandemic on the Mental Health of Healthcare Workers
Authors: Chatzittofis Andreas , Karanikola Maria , Michailidou Kyriaki , Constantinidou Anastasia
Published: February 2021

The coronavirus disease 2019 (COVID-19) has a great impact on healthcare workers (HCWs) that includes negative mental health outcomes, such as post-traumatic stress, anxiety and depressive symptoms. In this cross-sectional study, we report on mental health outcomes among HCWs in Cyprus. Data were collected between 3 May and 27 May 2020, with the use of an online questionnaire that included demographics (sex, age, occupation, education, work sector, years of work experience), the 9-item Patient Health Questionnaire (PHQ-9) which assesses depressive symptoms, the Impact of Events Scale Revised (IES-R), which measures post-traumatic stress disorder (PTSD) symptoms, and the-10 item Perceived Stress Scale (PSS-10) which quantifies stress responses. Participants (42% physicians, 24% nurses, 18% physiotherapists, 16% classified as “other”) were 58% of female gender and aged 21–76. A total of 79 (18.6%) and 62 HCWs (14.6%) reported clinically significant depressive (PHQ-9 ≥ 10) and post-traumatic stress (IES-R > 33) symptoms respectively. Nurses were more likely than physicians to suffer from depression (adjusted prevalence ratio 1.7 (1.06–2.73); p = 0.035) and PTSD (adjusted prevalence ratio 2.51 (1.49–4.23); p = 0.001). Even in a country with a rather low spread of the COVID-19, such as Cyprus, HCWs reported a substantial mental health burden, with nurses reporting increased depressive and PTSD symptoms compared to other HCWs.
Aerial Transmission of the SARS-CoV-2 Virus through Environmental E-Cigarette Aerosols: Implications for Public Policies
Authors: Sussman Roberto A. , Golberstein Eliana , Polosa Riccardo
Published: February 2021

We discuss the implications of possible contagion of COVID-19 through e-cigarette aerosol (ECA) for prevention and mitigation strategies during the current pandemic. This is a relevant issue when millions of vapers (and smokers) must remain under indoor confinement and/or share public outdoor spaces with non-users. The fact that the respiratory flow associated with vaping is visible (as opposed to other respiratory activities) clearly delineates a safety distance of 1–2 m along the exhaled jet to prevent direct exposure. Vaping is a relatively infrequent and intermittent respiratory activity for which we infer a mean emission rate of 79.82 droplets per puff (6–200, standard deviation 74.66) comparable to mouth breathing, it adds into shared indoor spaces (home and restaurant scenarios) a 1% extra risk of indirect COVID-19 contagion with respect to a “control case” of existing unavoidable risk from continuous breathing. As a comparative reference, this added relative risk increases to 44–176% for speaking 6–24 min per hour and 260% for coughing every 2 min. Mechanical ventilation decreases absolute emission levels but keeps the same relative risks. As long as direct exposure to the visible exhaled jet is avoided, wearing of face masks effectively protects bystanders and keeps risk estimates very low. As a consequence, protection from possible COVID-19 contagion through vaping emissions does not require extra interventions besides the standard recommendations to the general population: keeping a social separation distance of 2 m and wearing of face masks.
Correction: Doum, D., et al. Dengue Seroprevalence and Seroconversion in Urban and Rural Populations in Northeastern Thailand and Southern Laos. Int. J. Environ. Res. Public Health 2020, 17, 9134
Authors: Doum Dyna , Overgaard Hans J. , Mayxay Mayfong , Suttiprapa Sutas , Saichua Prasert , Ekalaksananan Tipaya , Tongchai Panwad , Rahman Md. Siddikur , Haque Ubydul , Phommachanh Sysavanh , Pongvongsa Tiengkham , Rocklöv Joacim , Paul Richard , Pientong Chamsai
Published: February 2021

There was an error in the original article [...]
Can Circumstances Be Softened? Self-Efficacy, Post-Migratory Stressors, and Mental Health among Refugees
Authors: van Heemstra Henriëtte E. , Scholte Willem F. , Nickerson Angela , Boelen Paul A.
Published: February 2021

Post-migratory stressors (PS) are a risk factor for mental health problems among resettled refugees. There is a need to identify factors which can reduce this burden. Self-efficacy (SE) is associated with refugees’ mental health. The current study examined whether SE can protect this group from the impact of PS on mental wellbeing. Higher levels of PS were expected to be associated with higher levels of mental health problems. In addition, we expected this linkage to be moderated by lower SE. Questionnaires were administered to a non-clinical refugee sample (N = 114, 46% female, average age 35 SD = 10.42 years) with various backgrounds. The following questionnaires were used: the Self-Reporting Questionnaire-20 (SRQ-20) to assess mental health problems, the General Self-Efficacy Scale (SGES) to measure SE, and an adapted version of the Post-Migration Living Difficulties Checklist (PMLD) to measure PS. Bivariate correlations and multiple linear regression analysis were performed. No significant contribution was found for SE or the interaction of SE and daily stressors, above and beyond the significant contribution of daily stressors to mental health problems. The findings reinforce that PS affects mental health and suggest that SE had a limited impact on mental health in this non-clinical sample of refugees.
Effect of Carbohydrate-Electrolyte Solution Including Bicarbonate Ion Ad Libitum Ingestion on Urine Bicarbonate Retention during Mountain Trekking: A Randomized, Controlled Pilot Study
Authors: Horiuchi Masahiro , Hasegawa Tatsuya , Nose Hiroshi
Published: February 2021

We investigated whether bicarbonate ion (HCO3−) in a carbohydrate-electrolyte solution (CE+HCO3) ingested during climbing to 3000 m on Mount Fuji could increase urine HCO3− retention. This study was a randomized, controlled pilot study. Sixteen healthy lowlander adults were divided into two groups (six males and two females for each): a tap water (TW) group (0 kcal with no energy) and a CE+HCO3 group. The allocation to TW or CE+HCO3 was double blind. The CE solution contains 10 kcal energy, including Na+ (115 mg), K+ (78 mg), HCO3− (51 mg) per 100 mL. After collecting baseline urine and measuring body weight, participants started climbing while energy expenditure (EE) and heart rate (HR) were recorded every min with a portable calorimeter. After reaching a hut at approximately 3000 m, we collected urine and measured body weight again. The HCO3− balance during climbing, measured by subtracting the amount of urine excreted from the amount of fluid ingested, was −0.37 ± 0.77 mmol in the CE+HCO3, which was significantly higher than in the TW (−2.23 ± 0.96 mmol, p < 0.001). These results indicate that CE containing HCO3− supplementation may increase the bicarbonate buffering system during mountain trekking up to ~3000 m, suggesting a useful solution, at least, in the population of the present study on Mount Fuji.
Polycystic Ovary Syndrome and Endometriosis as Reasons for Women’s Admission to Outpatient Specialist Care in Poland—A Retrospective Analysis
Authors: Rzońca Ewa , Kosowski Arkadiusz , Bień Agnieszka , Gotlib Joanna , Wejnarski Arkadiusz , Jarzębowska Marta , Gałązkowski Robert , Rzońca Patryk
Published: February 2021

This study aimed at presenting selected aspects of outpatient specialist care for women diagnosed with polycystic ovary syndrome (PCOS) or endometriosis. The study was carried out using a retrospective analysis of the services provided under Outpatient Specialist Care (AOS) for women, based on data from the National Health Fund (NFZ). The study included data on women with PCOS or endometriosis based on the International Statistical Classification of Diseases and Related Health Problems (ICD-10) in Poland from 2016 to 2018. The average age of women in the study group with PCOS was 25.31 (±7.02) years and, for those with endometriosis, 38.21 (±10.79). AOS patients with diagnosed PCOS most often made 2–3 visits (34.60%) to a specialist doctor, and those with diagnosed endometriosis most often made one visit (39.95%). Significant differences between patients with PCOS and endometriosis using AOS were found concerning the women’s age, the year, season, place of treatment, type of clinic, mode of admission, number of visits, and their place of residence or macroregion. With increasing age, women with PCOS made more visits to AOS, and women with endometriosis made fewer visits to the AOS specialist.
Perceived Preparedness of Dental Academic Institutions to Cope with the COVID-19 Pandemic: A Multi-Country Survey
Authors: Ammar Nour , Aly Nourhan M. , Folayan Morenike Oluwatoyin , Khader Yousef , Mohebbi Simin Z. , Attia Sameh , Howaldt Hans-Peter , Boettger Sebastian , Virtanen Jorma , Madi Marwa , Maharani Diah A. , Rahardjo Anton , Khan Imran , Al-Batayneh Ola B. , Rashwan Maher , Pavlic Verica , Cicmil Smiljka , Noritake Kanako , Galluccio Gabriella , Polimeni Antonella , Shamala Anas A. , Arheiam Arheiam , Mancino Davide , Phantumvanit Prathip , Kim Jin-Bom , Choi Youn-Hee , Dama Mai A. , Abdelsalam Maha M. , Castillo Jorge L. , Nyan Myat , Hussein Iyad , Joury Easter , Vukovic Ana P. , Iandolo Alfredo , Kemoli Arthur M. , El Tantawi Maha
Published: February 2021

Dental academic institutions are affected by COVID-19. We assessed the perceived COVID-19 preparedness of these institutions and the characteristics of institutions with greater perceived preparedness. An international cross-sectional survey of dental academics was conducted from March to August 2020 to assess academics’ and institutional attributes, perceived preparedness, and availability of infection prevention and control (IPC) equipment. Principal component analysis (PCA) identified perceived preparedness components. Multilevel linear regression analysis assessed the association between perceived preparedness and fixed effect factors (academics’ and institutions’ attributes) with countries as random effect variable. Of the 1820 dental academics from 28 countries, 78.4% worked in public institutions and 75.2% reported temporary closure. PCA showed five components: clinic apparel, measures before and after patient care, institutional policies, and availability of IPC equipment. Significantly less perceived preparedness was reported in lower-middle income (LMICs) (B = −1.31, p = 0.006) and upper-middle income (UMICs) (B = −0.98, p = 0.02) countries than in high-income countries (HICs), in teaching only (B = −0.55, p < 0.0001) and in research only (B = −1.22, p = 0.003) than teaching and research institutions and in institutions receiving ≤100 patients daily than those receiving >100 patients (B = −0.38, p < 0.0001). More perceived preparedness was reported by academics with administrative roles (B = 0.59, p < 0.0001). Academics from low-income countries (LICs) and LMICs reported less availability of clinic apparel, IPC equipment, measures before patient care, and institutional policies but more measures during patient care. There was greater perceived preparedness in HICs and institutions with greater involvement in teaching, research, and patient care.
Growth and Maturity Status of Female Soccer Players: A Narrative Review
Authors: Malina Robert M. , Martinho Diogo V. , Valente-dos-Santos João , Coelho-e-Silva Manuel J. , Kozieł Sławomir M.
Published: February 2021

Reported mean ages, heights and weights of female soccer players aged <19 years in 161 studies spanning the years 1992–2020 were extracted from the literature or calculated from data available to the authors; 35 studies spanning the years 1981–2020 also included an indicator of biological maturation. Heights and weights were plotted relative to U.S. reference data. Preece–Baines Model 1 was fitted to moving averages to estimate ages at peak velocity. Maturity indicators included skeletal age, pubertal status, age at menarche, percentage of predicted adult height and predicted maturity offset. Heights and weights showed negligible secular variation across the time interval. Heights were slightly above or approximated the reference medians through 14 years old and then varied between the medians and 75th percentiles through 18 years old. Weights were above the reference medians from 9 to 18 years old. Mean ages at menarche ranged from 12.7 to 13.0 years. The trend in heights and weights suggested the persistence and/or selection of taller and heavier players during adolescence, while estimated age at peak height velocity (PHV) and ages at menarche were within the range of mean ages in European and North American samples. Data for skeletal and sexual maturity status were limited; predicted maturity offset increased linearly with mean ages and heights at prediction.
Long-Term Benefits of Intermunicipal Cooperation for Small Municipalities in Waste Management Provision
Authors: Struk Michal , Bakoš Eduard
Published: February 2021

Intermunicipal cooperation offers an interesting alternative in cases when municipalities are too small to individually provide public services at an efficient cost level but are reluctant to form a municipal amalgamation in order to benefit from economies of scale. Forming a body consisting of multiple municipalities with a specific focus provides a way to reduce costs on service provision while maintaining municipal sovereignty in other areas. In our paper, we quantify the cost benefits of utilizing intermunicipal cooperation in the field of municipal solid waste management. We examine this using data from a 10-year period from municipalities in the South Moravian Region in the Czech Republic, where high municipal fragmentation results in many dominantly small municipalities that often are not able to provide public services at reasonable costs. This analysis contributes to the literature by conducting a long-term study of the effects of intermunicipal cooperation on public service provision costs. Our results suggest that municipalities participating in intermunicipal cooperation focused on waste management experienced annual cost savings of approximately 13.5% for provision of this service throughout the examined period of 2010–2019 when compared to municipalities that did not cooperate. These long-term results show how beneficial intermunicipal cooperation can be in reducing service costs. In addition to the direct financial benefits, municipal representatives stated that intermunicipal cooperation often brings other qualitative and non-financial benefits such as better service quality, the possibility to share infrastructure, and relief from administrative and managerial burdens through the utilization of professional management, which was especially appreciated by the smallest municipalities with limited administrative staff.
Neighborhood Environmental Factors and Physical Activity Status among Rural Older Adults in Japan
Authors: Okuyama Kenta , Abe Takafumi , Li Xinjun , Toyama Yuta , Sundquist Kristina , Nabika Toru
Published: February 2021

(1) Background: Although several neighborhood environmental factors have been identified to be associated with older adults’ physical activity, little research has been done in rural areas where the population is aging. This study aimed to investigate neighborhood environmental factors and the longitudinal change of physical activity status among rural older adults in Japan. (2) Methods: The study included 2211 older adults, aged over 60 years, residing in three municipalities in Shimane prefecture and participating at least twice in annual health checkups between 2010 and 2019. Physical activity was identified based on self-report. Hilliness, bus stop density, intersection density, residential density, and distance to a community center were calculated for each subject. Hazard ratios for the incidence of physical inactivity were estimated using Cox proportional hazards models. (3) Results: We found that 994 (45%) of the study subjects became physically inactive during the follow-up. Those living far from a community center had a lower risk of becoming physically inactive compared to those living close to a community center. When the analysis was stratified by residential municipality, this association remained in Ohnan town. Those living in hilly areas had a higher risk of becoming physically inactive in Okinoshima town. (4) Conclusions: The impact of neighborhood environmental factors on older adults’ physical activity status might differ by region possibly due to different terrain and local lifestyles.
Impact of Employment, Essential Work, and Risk Factors on Food Access during the COVID-19 Pandemic in New York State
Authors: Clay Lauren A. , Rogus Stephanie
Published: February 2021

The COVID-19 pandemic disrupted food systems and the economy in the U.S. and abroad. This cross-sectional study examined the direct and indirect impacts of COVID-19 on food access among low-income and Black, Indigenous, and people of color (BIPOC) in New York State. New York residents were recruited to complete a web-based survey through Qualtrics. The survey took place in May and June 2020 and asked participants about COVID-19 health impacts, risk factors, and food access. Chi-square analysis examined issues with food access experienced by demographic characteristics, work disruptions, health impacts, and household risk for contracting the virus and experiencing severe illness, and significant results were analyzed in a series of logistic regression models. After accounting for covariates, Hispanic respondents, those with likely Major Depressive Disorder, and essential workers were more likely to experience worse food access during COVID-19. Improved policies and services to address impacts on vulnerable populations such as BIPOC, those suffering from mental health disorders, and workers in lower-paying essential jobs can reduce the risk of food access issues at this time. Future research can identify how food access issues during the pandemic influenced diet quality, chronic disease risk and infection, and persistence of food access issues.
A National Memory Clinic Survey to Assess Provision for People from Diverse Ethnic Backgrounds in England and Wales
Authors: Brown Shovanne , Livingston Gill , Mukadam Naaheed
Published: February 2021

English national guidelines regarding dementia assessment and management recommend consideration of cultural and linguistic diversity when assessing people with cognitive complaints. To date there has been no assessment of adherence to these guidelines. We aimed to assess whether current services provided in memory assessment services (MAS) adhere to national policy, in their approach to the assessment and management of individuals with memory problems from minority ethnic backgrounds. We sent a survey to 213 memory services in England and Wales. Twenty MAS from seven regions responded to the survey. We found that 80% (16) provided translated resources, 70% (14) used cognitive assessment tools that are culturally sensitive and appropriate, and 65% (13) showed good use of sufficiently skilled and knowledgeable interpreters. Communication barriers, particularly language, were raised as a potential obstacle to diagnosing minority ethnic patients. Memory clinics appear to reflect national policy for the assessment and management of memory problems in minority ethnic patients. However, only a minority of services responded and they may be more engaged in considering these populations. We need wider knowledge of practice to explore how guidelines support healthcare professional’s assessment of patients from minority ethnic groups in memory service diagnostic procedures.