Welcome to Massey Research Online

Massey Research Online is an open access digital archive of the research and scholarship of Massey University and is jointly managed by the University Library and Information Technology Services.

Massey Research Online contains research theses and research outputs including published work by Massey University students and academic staff as well as peer-reviewed material not published elsewhere. In the case of previously published research outputs all requirements of copyright owners are observed.

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Organizational citizenship behavior in civil society workplaces
(John Wiley and Sons Inc., 2024-02-01) Langdon S; Fletcher RB; Carr SC
Organizational citizenship behavior is argued to be particularly important to civil society organizations (Akhtar, Hakeem, & Naeem, 2017). However, organizational citizenship behavior needs further theoretically driven research in the civil society sector, which is the overarching aim of this study which compared two competing models of organizational citizenship behavior within the New Zealand's civil society sector: Organ (1988) and Williams and Anderson (1991) models. Participants were N = 442 employees from 217 civil society organizations in New Zealand. Confirmatory factor analysis tested these two competing measurement models of organizational citizenship behavior. Results suggested employees of civil society organizations tended to perform citizenship behavior in accordance with Organ (1988) structured five-factor model, independent of their organization. Results are discussed, with a focus on why employees working in New Zealand's civil society sector seem to be more likely to perform Organ (1988) model of organizational citizenship behavior, and practical implications presented.
Examining the structure validity of the Pittsburgh Sleep Quality Index among female workers during New Zealand's initial COVID-19 lockdown.
(Springer Nature, 2024-04) Helles M; Fletcher R; Münch M; Gibson R
Sleep is important for good physical and mental health. The COVID-19 pandemic lockdown created a unique context that impacted psychological and social drivers for sleeping well. The Pittsburgh Sleep Quality Index (PSQI) is a widely used measurement tool assessing subjective sleep quality. The traditional model of the PSQI (a one-factor model), whilst validated and used across different populations, has also been questioned with regards to data fit and representativeness of its global score in different social and work-related circumstances. Examination of the structure validity of the PSQI in the unique context of the pandemic has been scarce. This study determined the PSQI structure validity amongst employed women considered to experience increased stressors during the pandemic lockdown. The subjectively reported PSQI data from 498 female workers (mean age 44.6 years) collected during New Zealand's first national COVID-19 lockdown (April, 2020) was used. Confirmatory factor analyses compared the original one-factor model of the PSQI with the two- and three-factor models used by Jia et al. (2019) within this pandemic context. Results showed that the two-factor model provided a superior fit of the PSQI data compared to the original one-factor or a three-factor model. These findings suggest that a sub-score of the PSQI with two factors appears to be better at describing the sleep quality of healthy working women during the constrained situation of the pandemic lockdown compared to a single global sleep quality score. This indicates the importance of considering the validity of subjective sleep measures when used within unique social contexts and stressors.
The Effect of the Liposomal Encapsulated Saffron Extract on the Physicochemical Properties of a Functional Ricotta Cheese
(MDPI (Basel, Switzerland), 2022-01) Siyar Z; Motamedzadegan A; Mohammadzadeh Milani J; Rashidinejad A; Omri A
In this study, the encapsulation of saffron extract (SE) was examined at four various concentrations of soy lecithin (0.5%-4% w/v) and constant concentration of SE (0.25% w/v). Particle size and zeta potential of liposomes were in the range of 155.9-208.1 nm and -34.6-43.4 mV, respectively. Encapsulation efficiency was in the range of 50.73%-67.02%, with the stability of nanoliposomes in all treatments being >90%. Encapsulated SE (2% lecithin) was added to ricotta cheese at different concentrations (0%, 0.125%, 1%, and 2% w/v), and physicochemical and textural properties of the cheese were examined. Lecithin concentration significantly (p ≤ 0.05) affected the particle size, zeta potential, stability, and encapsulation efficiency of the manufactured liposomes. In terms of chemical composition and color of the functional cheese, the highest difference was observed between the control cheese and the cheese enriched with 2% liposomal encapsulated SE. Hardness and chewiness increased significantly (p ≤ 0.05) in the cheeses containing encapsulated SE compared to the control cheese. However, there was no significant difference in the case of adhesiveness, cohesiveness, and gumminess among different cheeses. Overall, based on the findings of this research, liposomal encapsulation was an efficient method for the delivery of SE in ricotta cheese as a novel functional food.
Technical trading rules, loss avoidance, and the business cycle
(Elsevier B V, 2023-12) Ergun L; Molchanov A; Stork P
We show that simple technical trading rule (TTR) strategies substantially reduce investment left tail risk. An investor following a TTR strategy can also avoid a high percentage of extremely negative returns. This percentage increases substantially during recessions. Interestingly, tail risk reduction does not come at a cost of lower performance – risk adjusted returns of TTR strategies are in fact higher than those of a buy-and-hold strategy. Our findings are robust to changes in trading strategy specifications. They hold in 38 international equity markets, as well as in a large sample of individual US stocks, and survive a reality check bootstrap.
The direct and indirect effects of bioactive compounds against coronavirus
(John Wiley and Sons Australia, Ltd and Nanchang University, Northwest University, Jiangsu University, Zhejiang University, Fujian Agriculture and Forestry University, 2022-03-16) Tomas M; Capanoglu E; Bahrami A; Hosseini H; Akbari-Alavijeh S; Shaddel R; Rehman A; Rezaei A; Rashidinejad A; Garavand F; Goudarzi M; Jafari SM
Emerging viruses are known to pose a threat to humans in the world. COVID-19, a newly emerging viral respiratory disease, can spread quickly from people to people via respiratory droplets, cough, sneeze, or exhale. Up to now, there are no specific therapies found for the treatment of COVID-19. In this sense, the rising demand for effective antiviral drugs is stressed. The main goal of the present study is to cover the current literature about bioactive compounds (e.g., polyphenols, glucosinolates, carotenoids, minerals, vitamins, oligosaccharides, bioactive peptides, essential oils, and probiotics) with potential efficiency against COVID-19, showing antiviral activities via the inhibition of coronavirus entry into the host cell, coronavirus enzymes, as well as the virus replication in human cells. In turn, these compounds can boost the immune system, helping fight against COVID-19. Overall, it can be concluded that bioactives and the functional foods containing these compounds can be natural alternatives for boosting the immune system and defeating coronavirus.