Feedback environment: A meta‐analysis

Enterocin LD3 from Enterococcus hirae LD3 Inhibits the Growth of Salmonella enterica subsp. enterica serovar Typhimurium ATCC 13311 in Fruit Juice

In order to prevent the growth of pathogens in food, bacteriocins produced by various probiotic lactic acid bacteria have been recognized as potential substitutes of chemical preservatives. In this study, enterocin LD3 was purified from the cell-free supernatant of a food isolate, Enterococcus hirae LD3 using multistep chromatography. In the fruit juice, lethal concentration (LC50) of enterocin LD3 was found to be 260 µg/mL against Salmonella enterica subsp. enterica serovar Typhimurium ATCC 13311. The cells treated with enterocin LD3 were red colour indicating dead cells after propidium iodide staining, while untreated cells were found blue after staining with 4', 6-diamidino-2-phenylindole. The mechanism of cell killing was analyzed using infrared spectrum of cells treated with enterocin LD3 which was found altered in the range of 1,094.30 and 1,451.82 cm-1 corresponding to nucleic acids and phospholipids, respectively. The morphology of target cells were severely ruptured and lysed as observed under electron microscopy. Thus, the present study suggested that enterocin LD3 showed bactericidal activity against Salm. enterica subsp. enterica serovar Typhimurium ATCC 13311 and may be applied as a bio-preservative for the safety of fruit juices.

Fostering Learning Goals at Work: The Interplay of Dispositional and Workplace Learning Goal Orientation and Supervisor Appraisal Behavior

A workplace that emphasizes personal learning and task mastery fosters employee development and performance. However, it is yet unclear which specific factors support such a learning goal-oriented workplace. Based on research in the educational domain, we investigated the reciprocal effects of dispositional learning goal orientation, supervisor's appraisal behavior, and a learning goal-oriented workplace. In a study with a repeated measurement design (N = 144 employees), we did not find support for an effect of supervisor's appraisal behavior (operationalized by the perceived use of self-reference norms and constructive handling of errors by employees) on workplace learning goal orientation over time. However, we found that a dispositional learning goal orientation of employees supports a learning goal-oriented work environment. Furthermore, workplace learning goal orientation had a cross-lagged effect on dispositional learning goal orientation and supervisor's appraisal behavior. By comparing our results from work to findings from the educational context, our results convey important theoretical implications about the construct of workplace goal orientation and suggest practical applications to foster a learning goal-oriented workplace in terms of personnel development and performance management.

The role of the feedback environment in expatriate adjustment

Purpose

The purpose of the present study is to examine the role of the feedback environment in expatriate adjustment and subsequent performance. Based on newcomer adaptation and sensemaking theories, the authors proposed that the supervisor and coworker feedback environments would serve as informational resources, reducing the ambiguity associated with the expatriate's new setting.

Design/methodology/approach

This study was conducted with a broad sample of assigned expatriates (N = 95) originating from 33 different countries and currently working in 35 different host countries. Mediation analysis using a bootstrapping methodology was conducted to test the hypotheses.

Findings

The authors found that the supervisor feedback environment and coworker feedback environment were both related to expatriate adjustment through role clarity. The authors also found that the supervisor feedback environment was indirectly related to expatriate job performance and intent to leave the international assignment through both role clarity and adjustment.

Originality/value

This study examines the extent to which the supervisor and coworker feedback environments enable expatriates on an international assignment. Expatriates face challenges that may be ameliorated by constructive feedback practices. The authors discuss how organizations can improve expatriate sensemaking and adjustment through improved feedback practices.