bluuebunny/crossref_metadata_2025_split huggingface dataset:
Investigation of depression, anxiety and stress levels of health-care students during COVID-19 pandemic
Authors: Al-Maraira Obay A. , Shennaq Sami Z. 
Published: February 2021

Purpose
This study aims to determine depression, anxiety and stress levels of health-care students during coronavirus (COVID-19) pandemic according to various socio-demographic variables.

Design/methodology/approach
This cross-sectional study was conducted with 933 students. Data were collected with an information form on COVID- 19 and an electronic self-report questionnaire based on depression, anxiety and stress scale.

Findings
Findings revealed that 58% of the students experienced moderate-to-extremely severe depression, 39.8% experienced moderate-to-extremely severe anxiety and 38% experienced moderate-to-extremely severe stress.

Practical implications
Educational administrators can help reduce long-term negative effects on students’ education and mental health by enabling online guidance, psychological counseling and webinars for students.

Originality/value
This paper is original and adds to existing knowledge that health-care students’ depression, anxiety and stress levels were affected because of many factors that are not yet fully understood. Therefore, psychological counseling is recommended to reduce the long-term negative effects on the mental health of university students.
Mental health outcomes among health-care workers during the COVID-19 outbreak in Iran
Authors: Zakeri Mohammad Ali , Dehghan Mahlagha , Ghaedi Heidari Fatemeh , Pakdaman Hassan , Mehdizadeh Mehdi , Ganjeh Hamid , Sanji Rafsanjani Mojtaba , Hossini Rafsanjanipoor Sayed Mortaza 
Published: February 2021

Purpose
The increasing prevalence of coronavirus disease (COVID-19) is a global crisis that leads to physical and psychological outcomes for health-care workers, so this study aims to investigate the mental health outcomes (including general health, generalized anxiety disorder and posttraumatic stress disorder) in health-care workers in Rafsanjan, Iran.

Design/methodology/approach
By using convenience sampling, this cross-sectional study was conducted on 332 health-care workers working in public hospitals in southern Iran. Data collection lasted from March to April 2020. General Health Questionnaire (GHQ-28), Generalized Anxiety Disorder 7-item (GAD-7) and Impact of Event Scale were used to collect data. The data were then analyzed by using SPSS 25 and descriptive and inferential statistics (chi-square and multivariate logistic regression).

Findings
In total 45.5% of the participants had psychological disorder according to GHQ. In addition, 25.3% of the participants had GAD and 31.6% had posttraumatic stress disorder (PTSD). The results using multivariate logistic regression showed that only income was significantly associated with psychological disorders (95% confidence interval for odds ratio: 1.32–6.45, P = 0.008).

Practical implications
According to the results, the incidence of GAD and PTSD was high among health-care workers. Therefore, it is recommended that the psychological skills of health-care workers be strengthened through counseling and training programs.

Originality/value
This paper provides a novel analysis of mental health in health-care workers in Iran.
Democratic leadership and organizational performance: the moderating effect of contingent reward
Authors: Hilton Sam Kris , Arkorful Helen , Martins Albert 
Published: February 2021

PurposeThe purpose of this study is to investigate the moderating effect of contingent reward on the relationship between democratic leadership and organizational performance.Design/methodology/approachExplanatory and cross-sectional survey designs were used. A quantitative research approach was also adopted to collect the data from 476 employees in the telecommunication industry. Using statistics package for social science, the data was analyzed via descriptive statistics, correlation and hierarchical regression techniques.FindingsThe results reveal that both democratic leadership and contingent reward have a significant positive relationship with organizational performance. Furthermore, contingent reward significantly augments and moderates the relationship between democratic leadership and organizational performance. Thus, the combination of democratic leadership and contingent reward would more likely produce higher organizational performance.Originality/valueThis study has made a significant contribution to leadership and organizational literature by establishing the effectiveness of contingent reward as a moderator on the relationship between democratic leadership and organizational performance in a telecommunication industry.
Theorising an organisational citizenship behaviour model for managerial decision-making: from history to contemporary application
Authors: Benuyenah Vic 
Published: February 2021

Purpose
This study aims to expand the theory of organisational citizenship behaviour (OCB) to include “exterior” behaviours. By advancing the work of Blake and Mouton (1964) and remapping the performance/OCB dimensions offered in the historical literature, a new holistic model of organisational performance is proposed. As a further step, a decision-making tool is proposed for managerial decision-making and to help predict employee performance.

Design/methodology/approach
The paper adopts a critical review and conceptual approach to explore historical OCB theories and task performance (TP) taxonomies. It then used Blake and Mouton’s managerial grid to construct a contemporary conceptual tool for managerial decision-making.

Findings
Despite the performance literature not lacking in quantity, a few of such research have led to a pragmatic managerial tool. The review reveals several confusions regarding the accurate classification of what actually constitutes OCB and what constitutes TP – this gap is filled by the introduction of the OCB model for managerial decision-making (OMMD).

Research limitations/implications
The current work expands our thinking on OCBs that can occur outside the organisation. These exterior behaviours can influence the organisation’s performance and must be managed just like any other performance metric. The OMMD, primarily based on OCB and TP, provides an initial framework for exploring different typologies of employees. Despite being based on several cogent performance literatures, the proposals have not been tested empirically.

Practical implications
Like the Blake and Mouton model, the new OMMD can be useful in estimating the proportions of employee OCBs and TP.

Social implications
Culture and social exchange theory can be seen as playing a role in separating TP from OCB.

Originality/value
This study extends the work of Bateman and Organ (1983) by suggesting that some work behaviours can occur outside the organisation. Besides, a decision-making proposal is offered based on the managerial grid framework (Blake and Mouton, 1964).
Antioxidants, nutritional, antinutrients and functional characteristics of black turtle bean (Phaseolus vulgaris): synergistic and antagonistic interrelationship of epigeal germination periods
Authors: Chima Judith Uchenna , Fasuan Temitope Omolayo 
Published: February 2021

Purpose
Black turtle bean has nutritional potentials in the human diet and could provide a significant amount of food in developing countries. Low consumption of black beans has been attributed partly to the hard-to-cook phenomenon which requires a long time of cooking. Germination improves nutritional, functional, bioactive compounds, reduces anti-nutrients and cooking time. Germinated black turtle bean can contribute to efforts geared towards the production of functional foods and the fight against protein malnutrition. This study aims to investigate the changes in the nutritional, antioxidants and functional properties of black turtle bean due to different epigeal germination times to increase its utilization in food systems.

Design/methodology/approach
Black turtle bean seeds (Phaseolus vulgaris) were cleaned, winnowed, washed, soaked for 16 h, drained and subjected to epigeal germinated at ambient temperature for 0, 24, 48, 72 and 96 h, respectively. The germinated seeds were dried, dehulled, milled and sieved. Proximate, antioxidant properties and activity, anti-nutrients, mineral (calcium, phosphorus, iron, sodium, manganese, copper, potassium, zinc and magnesium) and functional properties (water absorption capacity, oil absorption, bulk density, swelling index, water solubility index and gelling concentration) of the germinated black turtle bean (GTB) flour (0GTB, 24GTB, 48GTB, 72GTB and 96GTB) were determined using standard procedures.

Findings
The ash, protein, fat and fibre contents of the black turtle bean were significantly increased through germination. Germination resulted in changes in the antioxidant activity of the black turtle bean samples. The mineral content of the black bean samples was improved significantly by germination and as well altered the functional properties (p < 0.01). Oxalate and phytate were significantly reduced with increased germination time (p < 0.01). In total, 96 h germination (96GTB) had better antioxidant activity, mineral and proximate composition with lower anti-nutrients.

Originality/value
Germination for 96 h proved to be the optimum time for improved mineral content, increased protein, ash, fibre, antioxidant activity and property with reduced antinutrients. Germination represents an attractive, inexpensive means of improving the nutritional profile and enhancing the bio-functionality of the black turtle bean. The epigeal germinated turtle bean could find applied as a functional ingredient in food formulation.
“Look on the bright side”: CEO optimism and firms' market valuation
Authors: Alshorman Salah , Shanahan Martin 
Published: February 2021

Purpose
Previous research suggests that a CEO’s attitude can impact a firm’s performance. More particularly, there appears to be a link between the CEO’s revealed level of optimism and firm’s market value. The purpose of this paper is to measure the level of optimism revealed by Australian CEOs in their shareholder letters and compares this with their firms’ current and future valuations.

Design/methodology/approach
This study assesses the CEO’s level of optimism using text analysis of the annual letters to shareholders in 180 Australian-based firms from 2010 to 2013. The market valuation of their companies over the same period is calculated using Tobin’s Q, and the results compared with the level of CEO optimism.

Findings
Comparing the level of revealed optimism with their firms’ valuations over four years, CEO optimism is positively correlated, both currently and prospectively with firm valuation. Given the period under study immediately followed the global financial crisis (GFC), the results suggest CEO optimism may be an important factor in adding to firm’s market resilience.

Research limitations/implications
The study examines the link between revealed CEO optimism and firm valuation over a turbulent period of the business cycle. While the sample period follows the GFC, and Tobin’s Q has some known deficiencies, the results imply that further research should be undertaken to examine the importance of CEOs tone and communicated attitudes on their firms’ financial outcomes.

Practical implications
The link between CEO optimism and the firm’s valuation suggest that shareholders and boards should pay particular attention to the values, cognitions and psychological and demographic characteristics of top executives when selecting CEOs. In particular, the results suggest that given two otherwise similar CEOs the one whose record of communication is optimistic should be preferred over a similarly qualified but less sanguine individual.

Originality/value
The paper represents the first study demonstrating the link between CEO’s communicated optimism and Australian firms’ valuations. The study uses three different measures of optimism to improve the robustness of its conclusions, and a comprehensive measure of firm value – Tobin’s Q. It is the first to quantify the association between CEO optimism and firm value shortly after a period of financial upheaval (the GFC). The findings indicate that CEO optimism contributes significantly to firm value. The study also tests whether “excessive” optimism negatively impacts firm performance and conclude there is no evidence of this in the sample period. The study suggests that more research should be done to examine the contribution of positive business attitudes to periods of economic stress.
A fresh look at the inflation-hedging attributes of residential property investments in emerging markets: evidence from Nigeria
Authors: Ekemode Benjamin Gbolahan 
Published: February 2021

PurposeThis study reinvestigates the short-run and long-run inflation-hedging attributes of residential property assets in the Nigerian property market, based on variations in property types and location.Design/methodology/approachData used for this study comprised the holding period returns of three residential property types, namely bungalow, block of flats and detached house during 1999–2018. These were obtained from property practitioners in Lagos, Abuja and Port Harcourt, respectively. The inflation values obtained from the National Bureau of Statistics were split into actual, expected and unexpected components. Fama and Schwert’s (1977) ordered least square (OLS) regression was used to assess the short-term inflation hedging efficacy. Afterwards, the long-run link between residential property and inflation was examined using the Johansen and Juselius cointegration test.FindingsThe results showed that despite the variations in hedging behaviour across property types in the three locations, residential property assets significantly provided protection over actual, expected and unexpected inflation in the short run based on the OLS regression analysis. The result of the Johansen and Juselius cointegration test also established a long-term link between the residential property assets and actual inflation. However, mixed results were found on the link between residential property and expected and unexpected inflation, as some of the assets did not effectively hedge these inflation components in the long run.Practical implicationsThe study implied that the differences in property types and geographic locations are crucial in establishing the short-run and long-run inflation-hedging attributes of residential property assets and should be factored into consideration.Originality/valueThe paper complements the existing body of knowledge on the inflation-hedging attributes of residential property in emerging markets by determining the effects of variation in house types and geographic differences on the analysis.
The sharing economy and the transformation of work: evidence from Foodora
Authors: Geissinger Andrea , Laurell Christofer , Öberg Christina , Sandström Christian , Suseno Yuliani 
Published: February 2021

PurposeThis article explores the various stakeholders' perceptions of the ways digital work is organised within the sharing economy and the social implications of the transformation of work.Design/methodology/approachApplying social media analytics (SMA) concerning the sharing economy platform Foodora, a total of 3,251 user-generated content was collected and organised throughout the social media landscape in Sweden over 12 months, and 18 stakeholder groups were identified, discussing digital work within seven thematic categories.FindingsThe results show that the stakeholder groups in the Swedish context primarily expressed negative views of Foodora's way of organising digital work. The social media posts outlined the distributive and procedural justice related to the working conditions, boycott and protests and critical incidents, as well as the collective bargaining of Foodora.Originality/valueBy utilising a novel SMA method, this study contributes to the extant literature on the sharing economy by providing a systematic assessment concerning the impact of the sharing economy platform on the transformation of work and the associated social consequences.
Keep your mouth shut until I feel good: testing the moderated mediation model of leader's threat to competence, self-defense tactics, and voice rejection
Authors: Popelnukha Anastasiia , Almeida Shamika , Obaid Asfia , Sarwar Naukhez , Atamba Cynthia , Tariq Hussain , Weng Qingxiong (Derek) 
Published: February 2021

PurposeAlthough voice endorsement is essential for individuals, teams and organizational performance, leaders who consider followers' voice to be threatening are reluctant to implement followers' ideas. The authors, taking note of this phenomenon, investigate why leaders who feel a threat from followers' voice exhibit voice rejection at the workplace and when this detrimental tendency can be diminished. Thus, based on the self-defense tendency as per self-affirmation theory, the authors argue that those leaders who experience threat triggered by followers' voice, justify voice rejection through the self-defense tactics: message derogation and source derogation. In addition, the authors also propose that a leader's positive (negative) affect experienced before voice exposure may decrease (increase) self-defense and voice rejection.Design/methodology/approachTo test the authors’ moderated mediation model, they conducted two independent vignette studies (N = 269; N = 208). The purpose of the first vignette study was to test the simple mediation (i.e. the direct and indirect effects), whereas the second study aimed to test the moderated mediation model.FindingsIn Study 1, the authors found that the leader's perceived threat to competence provoked by followers' voice was positively related to voice rejection, and the relationship was partially mediated by message derogation and source derogation. In line with this, in Study 2, the authors tested the moderated mediation model and replicated the findings of Study 1. They found that the effects of leader's perceived threat to competence on voice rejection through self-defense tactics are weaker (stronger) at the high (low) values of a leader's positive affect. In contrast, the effects of a leader's perceived threat to competence on voice rejection through self-defense tactics are stronger (weaker) at the high (low) values of a leader's negative affect.Originality/valueThis study suggests that leaders who experience a threat to competence instigated by employee voice are more likely to think that ideas proposed by employees are non-constructive and employees who suggest those ideas are not credible, and these appraisals have a direct influence on voice rejection. However, if leaders are in a good mood vs. bad mood, they will be less likely to think negatively about employees and their ideas even when they experience psychological threats. The findings highlight several avenues for future researchers to extend the literature on employee voice management and leadership coaching by providing theoretical and managerial implications.
Adsorptive removal of congo red dye from aqueous solutions using Mo-doped CoFe2O4magnetic nanoparticles
Authors: Amar Ibrahim A. , Asser Jawaher O. , Mady Amina S. , Abdulqadir Mabroukah S. , Altohami Fatima A. , Sharif Abubaker A. , Abdalsamed Ihssin A. 
Published: February 2021

PurposeThe main purpose of this paper is to investigate the adsorption properties of CoFe1.9Mo0.1O4magnetic nanoparticles (CFMo MNPs) using, anionic dye “congo red (CR)” as a model of water pollutants.Design/methodology/approachThe magnetic nano-adsorbent was synthesized via sol-gel process. Different techniques including; Fourier transform infrared spectroscopy, point of zero charge, scanning electron microscope and X-ray powder diffraction were used to characterize the prepared adsorbent. Adsorption experiments were conducted in batch mode under various conditions (contact time, shaking speed, initial dye concentration, initial solution pH, solution temperature and adsorbent amount) to investigate the adsorption capability of CFMo MNPs for CR.FindingsThe results showed that, CFMo MNPs could successfully remove more than 90% of CR dye within 20 min. Adsorption kinetics and isotherms were better described using pseudo-second-order (PSO) and Langmuir models, respectively. The maximum adsorbed amount (qmax) of CR dye was 135.14 mg/g. The adsorption process was found to be endothermic and spontaneous in nature as demonstrated by the thermodynamics (ΔGo,ΔHoandΔSo).Practical implicationsThis study provided a good example of using an easily separated magnetic nano-adsorbent for fast removal of a very toxic organic pollutant, congo red, from the aquatic environmentOriginality/valueThe employment of Mo-doped cobalt ferrite for the first time for removing hazardous anionic dyes such as congo red from their aqueous solutions.
Synthesis of waterborne hydroxyl acrylate resins and its application in VOC-free waterborne coatings
Authors: Wang Yonggui , Zhang Zeng , Wang Jianfeng , Sang Rui , Zhang Weigang 
Published: February 2021

Purpose
A kind of the Z-6020/E-44 modified waterborne hydroxyl acrylate resin (Z-WEA) and its application in volatile organic compound-free waterborne coatings were prepared.

Design/methodology/approach
The Z-6020/E-44 modified waterborne hydroxyl acrylate resin (Z-WEA) was obtained dropwise by adding a mixed solution of methyl methacrylate, n-butyl acrylate, hydroxyethyl methacrylate, acrylic acid and an initiator into a pre-prepared solution of isopropyl alcohol and E-44 and by semi-continuous solution polymerization, and this chain was further extended with organosiloxane (Z-6020) through graft copolymer, which was then neutralized with organic base and dispersed with water, with waterborne amino resin curing agent to form a film, and the properties were tested.

Findings
The results showed that when the dosage of initiator was 2.5% accounts for the total acrylic monomer, the hydroxyl content was 10%; the dosage of E-44 was 16%; the dosage of Z-6020 was 6%; the mass ratio of hard and soft monomer was 2.0:1; the neutralization was 100%; Z-6020/E-44 modified waterborne hydroxyl acrylate resin (Z-WEA) had excellent dispersion performance in water and storage stability; water absorption of cured film was 7.8%; pencil hardness reached 5H; adhesive force was 1 level; and the film was uniform and endowed with remarkable heat resistance, high gloss and good fullness.

Practical implications
This paper established a method to synthesize Z-6020/E-44 modified waterborne hydroxyl acrylate resin (Z-WEA) with green surfactants that can be used in the coatings, adhesives, finishing agents and so on.

Originality/value
This paper provides a method of preparing Z-6020/E-44 modified waterborne hydroxyl acrylate resin (Z-WEA) and with waterborne amino resin curing agent to form a film, and the film is uniform and endowed with remarkable heat resistance, high gloss and good fullness and meets the requirements of high-grade paint.