Paradoxical Leadership and Employee Task Performance: A Sense-Making Perspective.

Paradoxical leadership has received increasing research attention in recent years. Yet, questions remain as to why and when paradoxical leadership is effective in promoting employee work outcomes. Drawing upon the sense-making perspective, we propose that paradoxical leadership enhances employee task performance by increasing employees' adaptability, and paradoxical leadership is more effective when employees have higher levels of Zhong Yong thinking and organizational identification. To test our hypotheses, we conducted a multi-source and multi-wave survey study among 235 employees and their supervisors in southern China. The results of the regression analyses fully support our hypotheses. In general, our findings shed light on the underlying mechanisms, as well as the boundary conditions, of the effect of paradoxical leadership. The theoretical and practical implications of these findings are discussed.

Walnut Oil Prevents Scopolamine-Induced Memory Dysfunction in a Mouse Model.

For thousands of years, it has been widely believed that walnut is a kind of nut that has benefits for the human body. Walnut oil, accounting for about 70% of walnut, mainly consists of polyunsaturated fatty acids. To investigate the effect of walnut oil on memory impairment in mice, scopolamine (3 mg/kg body weight/d) was used to establish the animal model during Morris Water Maze (MWM) tests. Walnut oil was administrated orally at 10 mL/kg body weight/d for 8 consecutive weeks. The results showed that walnut oil treatment ameliorated the behavior of the memory-impaired mice in the MWM test. Additionally, walnut oil obviously inhibited acetylcholinesterase activity (1.26 ± 0.12 U/mg prot) (p = 0.013) and increased choline acetyltransferase activity (129.75 ± 6.76 U/mg tissue wet weight) in the brains of scopolamine-treated mice (p = 0.024), suggesting that walnut oil could prevent cholinergic function damage in mice brains. Furthermore, walnut oil remarkably prevented the decrease in total superoxide dismutase activity (93.30 ± 5.50 U/mg prot) (p = 0.006) and glutathione content (110.45 ± 17.70 mg/g prot) (p = 0.047) and the increase of malondialdehyde content (13.79 ± 0.96 nmol/mg prot) (p = 0.001) in the brain of scopolamine-treated mice, indicating that walnut oil could inhibit oxidative stress in the brain of mice. Furthermore, walnut oil prevented histological changes of neurons in hippocampal CA1 and CA3 regions induced by scopolamine. These findings indicate that walnut oil could prevent memory impairment in mice, which might be a potential way for the prevention of memory dysfunctions.

Application of Protein Hydrolysates from Defatted Walnut Meal in High-Gravity Brewing to Improve Fermentation Performance of Lager Yeast.

Protein hydrolysates were prepared from an industrially defatted walnut meal (DWMPH) by enzymolysis employing Neutrase, Protamex, and Flavorzyme, respectively, with/without ultrasonic treatment. The effects of DWMPH supplementations on fermentation performance of lager yeast in high-gravity brewing were investigated. Results showed that ultrasonic-assisted enzymolysis simultaneous treatment (UAE) and ultrasonic pretreatment followed by enzymolysis (UPE) significantly increased degree of hydrolysis (DH) by 1.43 times and 0.71 times of traditional enzymolysis (TE) at least, respectively, Protamex treatment exhibited higher DH (13.3-32.8%) than Neutrase (9.2-25.3%) or Flavorzyme (11.8-28.7%). Compared with control, DWMPH supplementations prepared by UAE using Protamex (UAE-P), Neutrase (UAE-N), or Flavorzyme (UAE-F) significantly improved fermentation performance of lager yeast, especially for UAE-P with the highest major fractions of Mw < 1 kDa, increased wort fermentability and ethanol production by 15% and 17%, respectively, while UAE-F with the highest major fractions of Mw > 3 kDa obviously improved the foam stability of final beers. Furthermore, DWMPH supplementations significantly increased yeast growth and cell viability, promoted glycogen and trehalose accumulation, upregulated stress markers HSP12 and SSA3 expression in yeast cells, improved the formation of higher alcohols and esters, and increased the ratio of higher alcohol to ester indicating a better balanced taste of final beers.

Do emotional labour strategies influence emotional exhaustion and professional identity or vice versa? Evidence from new nurses.

AIMS: The aim was to examine the reciprocal relationships of emotional labour strategies with emotional exhaustion and professional identity. DESIGN: This study adopted a four-wave cross-lagged panel design. METHODS: Survey data were collected in 2018 from a sample of 171 newly hired nurses from 58 hospitals in 11 provinces of China. Nurses' emotional labour (i.e., deep acting and surface acting), emotional exhaustion and professional identity were repeatedly measured. Cross-lagged panel analyses were conducted to examine the reciprocal relationships we hypothesized. RESULTS: We found that emotional exhaustion was positively related to surface acting (but not vice versa); deep acting was negatively related to emotional exhaustion (but not vice versa); professional identity was positively related to deep acting (but not vice versa). CONCLUSION: Our findings suggest that deep acting and professional identity may decrease the level of emotional exhaustion, whereas emotionally exhausted nurses are more likely to employ surface acting strategies. IMPACT: This research finding will have an impact on the nursing management. Healthcare managers may consider workshops or training and development programs that promote nurses' professional identify to promote nurses' use of deep acting and consequently reduce their level of emotional exhaustion, which has been associated with a variety of negative consequences, such as low quality of patient service, high medical accidents, and turnover rate.

The Influence of Transactive Memory System on Individual Career Resilience: The Role of Taking Charge and Self-Promotion.

The transactive memory system is known as an effective group cognitive system as well as a knowledge-sharing structure for organizations to keep competitive advantages in today's dynamic and knowledge-based business environment. However, its influence at the individual level remains vague. The purpose of this study is to explore the influence of a transactive memory system (TMS) on individual career resilience through the theoretical perspective of conservation of resources theory (COR). This research proposes and examines a moderated mediation model that elaborates how a transactive memory system affects individual career resilience. A two-stage empirical study was conducted among 328 employees from companies in China. The findings suggest that a transactive memory system significantly influences individual career resilience positively, and employee taking-charge behavior plays a mediating role in that relationship. Furthermore, the results supported our moderated mediation model, which indicates that individuals with high self-promotion motives are more likely to engage in taking-charge behavior than those with low self-promotion motives, and the former reported higher career resilience than the latter eventually. Theoretical and practical implications are also provided in the discussion section.

A Study of the Mechanism of the Congruence of Leader-Follower Power Distance Orientation on Employees' Task Performance.

Based on implicit leadership theory, we examine the congruence effect of leader-follower power distance orientation (PDO) on follower trust in supervisor and work engagement, which in turn influences employees' task performance. Results of polynomial regressions on 526 dyads supported the congruence effect hypothesis. The results show that (1) the congruence of leader-follower PDO leads to better performance; (2) under the condition of congruence, subordinate task performance is higher when leader-follower PDO matching in low-low ratings congruence than it is in high-high ratings congruence; (3) under the condition of asymmetrical incongruence, the follower had higher task performance when a leader's PDO is lower than a follower's PDO; (4) trust in supervisor and the work engagement mediate the effect of congruence of leader-follower PDO on employees' task performance; (5) trust in supervisor also mediates the effect of congruence of leader-follower PDO on employees' work engagement.

Walnut Protein Hydrolysates Play a Protective Role on Neurotoxicity Induced by d-Galactose and Aluminum Chloride in Mice.

In recent years, with an increase in the aging population, neurodegenerative diseases have attracted more and more attention. This study aimed to investigate the potential neuroprotective effect of defatted walnut meal protein hydrolysates (DWMPH) on neurotoxicity induced by d-galactose (d-gal) and aluminum chloride (AlCl3) in mice. The animal models were established by combining treatments with d-gal (200 mg/kg/day, subcutaneously) and AlCl3 (100 mg/kg in drinking water) for 90 days. During the 90 days, 1 g/kg of DWMPH was administrated orally every day. The results indicated that DWMPH treatment alleviated oxidative stress, reversed cholinergic dysfunction, and suppressed the release of proinflammatory cytokines in the brains of d-gal + AlCl3-treated mice, and thus improving the learning and memory functions of these mice, which was closely correlated with the strong antioxidant activity of DWMPH. This finding suggests that DWMPH might be a promising dietary supplement in improving neuronal dysfunctions of the brain.

Perceived Insider Status and Feedback Reactions: A Dual Path of Feedback Motivation Attribution.

Many studies have evaluated how the characteristics of feedback receiver, feedback deliverer and feedback information influence psychological feedback reactions of the feedback receiver while largely neglecting that feedback intervention is a kind of social interaction process. To address this issue, this study proposes that employees' perceived insider status (PIS), as a kind of employee-organization relationship, could also influence employees' reactions to supervisory feedback. In particular, this study investigates the influence of PIS focusing on affective and cognitive feedback reactions, namely feedback satisfaction and feedback utility. Surveys were conducted in a machinery manufacturing company in the Guangdong province of China. Samples were collected from 192 employees. Data analysis demonstrated that PIS and feedback utility possessed a U-shaped relationship, whereas PIS and feedback satisfaction exhibited positively linear relationships. The analysis identified two kinds of mediating mechanisms related to feedback satisfaction and feedback utility. Internal feedback motivation attribution partially mediated the relationship between PIS and feedback satisfaction but failed to do the same with respect to the relationship between PIS and feedback utility. In contrast, external feedback motivation attribution partially mediated the relationship between PIS and feedback utility while failing to mediate the relationship between PIS and feedback satisfaction. Theoretical contributions and practical implications of the findings are discussed at the end of the paper.