Interaction with Endogenous Microorganisms, Comamonas testosteroni Enhanced the Degradation of Polycyclic Aromatic Hydrocarbon in Soil

2021 ◽  
Author(s):  
Xueting Sun ◽  
Xin Li ◽  
Yue Cui ◽  
Ziwei Jiang ◽  
Qiao Wang ◽  
...  
Keyword(s):  
Contaminated Soil ◽  
Structural Equation ◽  
Functional Role ◽  
Degradation Rate ◽  
Structural Equation Models ◽  
Low Molecular Weight ◽  
Comamonas Testosteroni ◽  
Functional Bacteria ◽  
Polycyclic Aromatic

Abstract This study was to explore the functional role of Comamonas testosteroni (Ct) on soil indigenous microorganisms, and analyze the effect of Ct on PAHs degradation in PAH-contaminated soil. Results showed that inoculation of Ct could degrade naphthalene (Nap), phenanthrene (Phe), and benzo [α] pyrene (BaP) significantly. The degradation rate of Nap, Phe and BaP was 81.18%, 63.38% and 37.98% on day 25, respectively, suggesting that the low molecular weight of Nap and Phe were easier to be degraded by microorganisms than BaP. Network analysis showed that inoculation of Ct significantly increased the bacteria closely related to PAHs. Structural equation models confirmed Steroidobacter as functional bacteria could affect the degradation of Nap and BaP. Inoculated Ct could effectively enhance the synergy among indigenous bacteria to degrade PAHs. This would be helpful to understand the function of inoculated strains in PAH-contaminated soil and identify functional microorganisms of PAHs remediation.

Suicidal Ideation Among International Students: The Role of Cultural, Academic, and Interpersonal Factors

2021 ◽  
pp. 001100002110024
Author(s):  
Andrés E. Pérez Rojas ◽  
Na-Yeun Choi ◽  
Minji Yang ◽  
Theodore T. Bartholomew ◽  
Giovanna M. Pérez
Keyword(s):  
International Students ◽  
Suicidal Ideation ◽  
Structural Equation ◽  
Structural Equation Models ◽  
The United States ◽  
Cross Cultural ◽  
Thwarted Belongingness ◽  
Perceived Burdensomeness ◽  
Using Data

We examined two structural equation models of international students’ suicidal ideation using data from 595 international students in two public universities in the United States. The models represented competing hypotheses about the relationships among discrimination, cross-cultural loss, academic distress, thwarted belongingness, perceived burdensomeness, and suicidal ideation. The findings indicated there were direct, positive links between discrimination, cross-cultural loss, and academic distress to perceived burdensomeness; a direct, positive link between perceived burdensomeness and suicidal ideation; and indirect, positive links between discrimination, cross-cultural loss, and academic distress to suicidal ideation via perceived burdensomeness. The only predictors that related to thwarted belongingness were cross-cultural loss and academic distress, and there were no indirect links to suicidal ideation via thwarted belongingness. In fact, with all other variables in the model, thwarted belongingness was unrelated to suicidal ideation. Finally, academic distress was directly related to suicidal ideation. We discuss implications of the findings.

Volition to transfer: mastering obstacles in training transfer

2017 ◽  
Vol 46 (4) ◽  
pp. 809-823 ◽  
Author(s):  
Christian Seiberling ◽  
Simone Kauffeld
Keyword(s):  
Structural Equation ◽  
Transfer Of Training ◽  
Structural Equation Models ◽  
Training Transfer ◽  
Bootstrap Analysis ◽  
Content Type ◽  
Confirmatory Factor ◽  
Motivation To Transfer ◽  
Practical Implications

Purpose The purpose of this paper is to seek a better understanding of the role of volition in the learning transfer system beyond the well-established concept of motivation to transfer. Design/methodology/approach Participants of a two-day leadership training were asked to complete two online questionnaires (t1 directly after training, t2 eight weeks after training). In total, 891 managers answered the first questionnaire, 465 the second. Findings Confirmatory factor analysis suggests that motivation and volition to transfer are perceived as two different constructs. Hierarchical linear regression shows that additional variance in training transfer can be explained when volition to transfer is taken into account. Structural equation models and bootstrap analysis suggest that both motivation and volition to transfer mediate effects of supervisor support and trainer performance on training transfer. Research limitations/implications The results imply that besides motivation to transfer, volition to transfer may be a relevant construct in the transfer of training. It remains to be tested how far these findings can be generalized to other training settings beside leadership trainings. Practical implications Organizations aiming at improving training transfer should focus on enhancing the participants’ motivation and volition to transfer. Both trainers and supervisors seem to promote transfer of training by influencing a trainee’s motivation to transfer and volition to transfer. Originality/value To the authors’ knowledge, this is the first study to systematically examine the role of volition in training transfer.

scholarly journals Behavioral engagement and disaffection in school activities: Exploring a model of motivational facilitators and performance outcomes

2015 ◽  
Vol 31 (3) ◽  
pp. 869 ◽  
Author(s):  
Antonio González ◽  
Paola Verónica Paoloni
Keyword(s):  
Perceived Control ◽  
Structural Equation ◽  
Structural Equation Models ◽  
Performance Outcomes ◽  
Theory And Practice ◽  
Behavioral Engagement ◽  
School Activities ◽  
Structural Relationships ◽  
And Performance

Previous research has shown that perceived control, task value, behavioral engagement and disaffection are personal determinants of academic performance. However, little research has simultaneously examined these constructs in secondary education. The present study analyzed the structural relationships between these variables and the role of engagement and disaffection as mediators of control and value on performance. Participants were 446 students (51.3% girls) ranging in age from 12 to 16 years attending six Spanish compulsory secondary schools (from 7th to 10th grades). The variables were assessed over a nine-month period. Structural equation models results confirmed the hypotheses: control and value significantly predicted engagement, disaffection, and performance; engagement and disaffection predicted performance and partially mediated the effects from control and value on performance. Implications for psycho-educational theory and practice are discussed.

Understanding destination evangelism: a social media viewpoint

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Purvendu Sharma
Keyword(s):  
Social Media ◽  
Information Seeking ◽  
Structural Equation ◽  
Structural Equation Models ◽  
Critical Role ◽  
Content Type ◽  
Mediating Role ◽  
Information Seeking Behaviors ◽  
Role Of Information

PurposeThe present research aims to introduce and understand the promising nature of destination evangelism in the context of social media-based tourism communities (SMTCs). Further, factors that influence evangelism and information-seeking behaviors on SMTCs are examined.Design/methodology/approachA conceptual model is developed that features an interplay of destination distinctiveness, destination evangelism, travel commitment and information-seeking engagement. Data were collected from 215 active users of SMTCs and analyzed using structural equation models.FindingsThe research findings indicate that destination distinctiveness and information-seeking positively lead to destination evangelism. Information-seeking is found to mediate the relationship between (1) destination evangelism and travel commitment and (2) destination evangelism and distinctiveness.Research limitations/implicationsThe research offers meaningful insights into exploring constituents of destination evangelism. The research also understands and highlights the critical role of information-seeking engagement about distinct destinations.Practical implicationsThis research highlights key areas to build, improve and inspire destination evangelism on SMTCs.Originality/valueThis study offers a fresh contribution to tourism literature by investigating destination evangelism and its drivers. This is explained by closely uniting vital research streams of evangelism, tourism and engagement. It further highlights the dual mediating role of information seeking, suggesting that these engagements are critical to evangelizing destinations.

scholarly journals Gender-specific patterns and determinants of spillover between work and family: The role of partner support in dual-earner couples

2020 ◽  
Vol 33 (1) ◽  
pp. 72-98
Author(s):  
Ayhan Adams ◽  
Katrin Golsch
Keyword(s):  
Structural Equation ◽  
Structural Equation Models ◽  
Work And Family ◽  
Partner Support ◽  
Full Time ◽  
Family Conflicts ◽  
Dual Earner ◽  
Different Types ◽  
Gender Specific

Objective: The study investigates how partner support affects different types of work-to-family and family-to-work conflicts in dual-earner couples divided by gender and parenthood. Background: In Germany, as in other Western Countries, interrole conflicts between work and family increase, especially within dual-earner couples. Only few studies focused on the effects of partner support on different types of these conflicts. Method: We use longitudinal data deriving from waves 6 to 10 of the German Family Panel (pairfam) to uncover the extent to which the perception of having a supportive partner reduces time- and strain-based work-to-family and family-to-work conflicts. We conduct longitudinal structural equation models based on information of 1,252 persons, which are full-time employed and live in a dual-earner relationship. Results: Whereas for men partner support helps reduce stress-based work-to-family conflicts, for women perceived partner support is not beneficial. Within a subsample of parents, the experience of work-to-family conflicts is likely irrespective of partner support. Overall, women’s family-to-work conflicts appear to be reduced by their partners’ support whereas for men this detrimental effect only applies in the case of stress-based family-to-work conflicts. Conclusion: To sum up the findings, the differences for men and women in the effect of partner support on different types of interrole conflicts indicate a still existing impact of traditional gender norms that connect femininity to house work and masculinity to employed work.

Dynamic capabilities: antecedents and implications for firms' performance

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ricardo Jorge Correia ◽  
Mário Sérgio Teixeira ◽  
José G. Dias
Keyword(s):  
Structural Equation ◽  
Dynamic Capabilities ◽  
Structural Equation Models ◽  
Causal Link ◽  
Competitive Advantages ◽  
Content Type ◽  
Mediating Role ◽  
Strategic Orientations ◽  
The Relationship

PurposeThis paper aims to explore a new causal link between learning, market and entrepreneurial orientations and firms' performance by introducing dynamic capabilities and competitive advantages as mediator variables.Design/methodology/approachThe mediating role of dynamic capabilities and competitive advantages is tested using a sample of 1,190 Portuguese firms, and structural equation models.FindingsIt is shown that dynamic capabilities mediate the relationship between the three orientations–learning, market and entrepreneurial–and competitive advantages of differentiation and cost leadership, and both competitive advantages lead to firm's performance. It is also shown that learning orientation is an antecedent of market orientation and entrepreneurial orientation.Practical implicationsThis research shows that firm's performance depends on the capacity of firms to learn, innovate, be proactive, take risks and collect the best market data. Indeed, by optimizing the internal management and knowledge dissemination, firms will develop a set of capabilities and competitive advantages that lead to an appropriate response to market challenges.Originality/valueThis study tests the relationship between strategic orientations and firm's performance by taking the mediating effects of dynamic capabilities and competitive advantages into account. This research was conducted in Portugal.

scholarly journals Multimorbidity, inflammation, and disability: a longitudinal mediational analysis

2018 ◽  
Vol 10 ◽  
pp. 204062231880684 ◽  
Author(s):  
Elliot M. Friedman ◽  
Daniel K. Mroczek ◽  
Sharon L. Christ
Keyword(s):  
Chronic Conditions ◽  
Structural Equation ◽  
Structural Equation Models ◽  
Functional Limitations ◽  
The United States ◽  
C Reactive Protein ◽  
Reactive Protein ◽  
Mediational Analysis

Background: Using longitudinal data from the Survey of Mid-Life Development in the United States, this study examined the role of systemic inflammation in mediating the link between multimorbidity and increases in and onset of functional limitations over a 17–19 year follow-up period. Methods: Participants completed questionnaire assessments of chronic conditions and functional limitations. Interleukin-6, C-reactive protein, and fibrinogen were assayed in serum. Structural equation models were used to predict increases in and onset of functional limitations associated with baseline multimorbidity status; mediation by inflammation was also determined. Results: Multimorbidity ( versus 0–1 conditions) predicted more functional limitations and greater odds of onset of limitations over time. Significant indirect effects showed that inflammation partially mediated the link between multimorbidity and changes in, but not onset of, limitations. Discussion: These results show that inflammation, a nonspecific marker of multiple disease conditions, explains in part the degree to which multimorbidity is disabling.

scholarly journals Behavioral barriers of tuberculosis notification in private health sector: policy implication and practice

2020 ◽  
Vol 25 (4) ◽  
pp. 307-318
Author(s):  
Ayat Ahmadi ◽  
Leila Doshmangir ◽  
Vladimir Sergeevich Gordeev ◽  
Bahareh Yazdizadeh ◽  
Reza Majdzadeh
Keyword(s):  
Private Sector ◽  
Structural Equation ◽  
Structural Equation Models ◽  
Behavioral Control ◽  
Health Sector ◽  
Perceived Behavioral Control ◽  
Cross Sectional ◽  
Content Type ◽  
Behavioral Determinants

PurposeUnderreporting of new tuberculosis (TB) cases is one of the main problems in TB control, particularly in countries with high incidence and dominating role of a private sector in TB cases diagnosing. The purpose of this paper was to explore behavioral determinants of underreporting of new TB cases among private sector physicians in Iran.Design/methodology/approachThe authors conducted a population-based, cross-sectional study of physicians working in private clinics. The data collection tool was designed using the theory of planned behavior (TPB). The authors used structural equation models with maximum likelihood estimation to examine attitude toward the notification behavior.FindingsOf 519 physicians, 433 physicians completed the questionnaire. Attitude toward notification had the highest score (mean score = 87.65; sd = 6.79; range: 0–100). The effect of perceived behavioral controls on the notification behavior ((β^) = 0.13; CI: 0.01–0.25) was stronger than the total effect of attitude ((β^) = 0.06; CI: 0.00–0.12) and subjective norms ((β^) = 0.01; CI: −0.00–0.03) on the behavior. However, the attitude was the main predictor of intention and justified 46% of the intention variance. Intention had a significant effect on the behavior ((ß^) = 0.09; CI: 0.1–0.16).Practical implicationsConsidering stronger effect of perceived behavioral control on the behavior, interventions aiming at facilitating notification process would be more effective than those aiming at changing the attitude or enhancing intention among physicians.Originality/valueTo the best of our knowledge, no other study previously explored determinants of underreporting from the behavioral and cognitive perspective. Specifically, the authors explored the role of the TPB constructs in predicting intention to notify new TB cases.

scholarly journals Does Motivation and Trust Important for Tourists’ Loyalties? A Quantitative Perspective from Golf Tourism in Bali of Indonesia

2019 ◽  
pp. 88
Author(s):  
Panudiana Kuhn ◽  
Komang Gde Bendesa ◽  
Agung Suryawan Wiranatha
Keyword(s):  
Intrinsic Motivation ◽  
Causal Relationship ◽  
Structural Equation ◽  
Extrinsic Motivation ◽  
Structural Equation Models ◽  
Vital Role ◽  
Tourist Attractions ◽  
Level Of Satisfaction ◽  
Sport Activities

Golf is one of several sport tourist attractions that are increasingly demanding by domestic and foreign tourists during their visit to Bali. Unlike the others type of tourist attractions, golf tourism could be classified as a quality attraction. Tourists who play golf spend more money than other sport activities. Refers to this fact, golf tourism could be an alternative to realizing the establishment of quality tourism in Bali. This work aims to study the significance of the determinants of tourists' satisfaction as well as their loyalty in visiting Bali as a destination that offers golf attractions. Intrinsic motivation and extrinsic motivation from golfers are positioned as the antecedent of the level of satisfaction with their trust to the golf providers acts as the mediation of the causal relationship occured. Using 5-scale Likert questionnaire, the opinions of 113 foreign tourists who played golf in Bali were used to examine the structural equation models that were built. The results of the analysis show that both types of motivation have positive influences on tourist trust in golf operators, and through the trust mediation, these motivations positively influence the level of tourist loyalties. The results of the analysis also showed that tourists’ trust to the golf operators had a significant effect on tourist loyalty. The main findings of this research conclude the vital role of tourists’ trust to the golf operators in Bali in increasing their loyalty to play golf while visiting Bali. Keywords : golf, trust, satisfaction, loyalties, motivation, SEM.

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