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91.
The more I want,the less I have left to give: The moderating role of psychological entitlement on the relationship between psychological contract violation,depressive mood states,and citizenship behavior
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Research has emphasized the negative effects of organizations' broken promises and failed obligations on employee attitudes and behaviors. However, not all employees respond in the same manner. This paper integrates research on psychological contracts and psychological entitlement to examine how individuals with exceedingly high demands and expectations react to a perceived letdown by the organization. Drawing on conservation of resources theory, we argue that a psychological contract violation is associated with employee depressive mood states, which, in turn, influence the amount of citizenship behavior displayed. We further posit that psychological entitlement moderates the link between contract violation and depressive mood states. Using Hayes' PROCESS macro to assess a moderated mediation model, findings from a multi‐source field study support our predictions. This research contributes to the work on psychological contracts and psychological entitlement on multiple fronts. Suggestions for future research and practical implications for managers are discussed. Copyright © 2016 John Wiley & Sons, Ltd. 相似文献
92.
Evaluation of different electrochemical methods on the oxidation and degradation of Reactive Blue 4 in aqueous solution 总被引:5,自引:0,他引:5
The oxidation of a reactive dye, Reactive Blue 4, RB4, (C.I. 61205), widely used in the textile industries to color natural fibers, was studied by electrochemical techniques. The oxidation on glassy carbon electrode and reticulated vitreous carbon electrode occurs in only one step at 2.0 < pH < 12 involving a two-electron transfer to the amine group leading to the imide derivative. Dye solution was not decolorized effectively in this electrolysis process. Nevertheless, the oxidation of this dye on Ti/SnO2/SbO(x) (3% mol)/RuO2 (1% mol) electrode showed 100% of decolorization and 60% of total organic carbon removal in Na2SO4 0.2 M at pH 2.2 and potential of +2.4V. Experiments on degradation photoelectrocatalytic were also carried out for RB4 degradation in Na2SO4 0.1 M, pH 12, using a Ti/TiO2 photoanode biased at +1.0 V and UV light. After 1h of electrolysis the results indicated total color removal and 37% of mineralization. 相似文献
93.
Rossini-Oliva Sabina Abreu Maria Manuela Leidi Eduardo Oscar 《Environmental geochemistry and health》2021,43(4):1523-1535
Environmental Geochemistry and Health - The effect of exposure to high Mn concentration was studied in a metallophyte species, Erica andevalensis, using hydroponic cultures with a range of Mn... 相似文献
94.
Giuseppe?BoncoraglioEmail author Manuela?Caprioli Nicola?Saino 《Behavioral ecology and sociobiology》2012,66(4):539-546
Reproduction entails parental decisions over allocation of limiting resources. ‘Begging’ solicitation displays by the offspring
have been hypothesised to evolve as reliable indicators of quality, allowing parents to adopt optimal allocation strategies.
To function as such, however, begging signals must covary with offspring traits that affect viability. Here we tested whether
oxidative damage of nestling barn swallows predicts begging bout duration, call amplitude and intensity of postural displays
both under normal food provisioning and under food shortage. Oxidative damage as determined by normal metabolism, pathological
conditions and functioning of the immune system can serve as a comprehensive indicator of offspring condition because it can
profoundly affect viability, senescence and reproduction. Begging bout duration was negatively predicted by oxidative damage
but only after food deprivation. Postural begging negatively covaried with oxidative damage, at least when nestlings were
confronted with related nest mates. Plasma antioxidant capacity did not predict begging behaviour. Thus, we show for the first
time that behavioural begging covaries with a comprehensive index of chick condition, lending support to reliability of such
begging traits also as signals of quality rather than need or hunger only. Future studies are candidate to decouple the effect
of hunger state and individual condition on behavioural begging. 相似文献
95.
Diego Rubolini Roberto Ambrosini Maria Romano Manuela Caprioli Mauro Fasola Andrea Bonisoli-Alquati Nicola Saino 《Behavioral ecology and sociobiology》2009,63(12):1809-1819
Non-random sex allocation may occur whenever the expected reproductive value of sons and daughters differs, as is the case when the sexes differ in susceptibility to environmental conditions or maternal effects (e.g. egg size and hatch order). Under such circumstances, covariation between egg and clutch characteristics and egg sex may be expected, and this covariation should vary with maternal state or ecological conditions. In this 2-year study (2007–2008), we examined sex allocation in relation to egg and clutch traits in the yellow-legged gull Larus michahellis, a species where male chicks are larger and more susceptible to harsh rearing conditions than female ones. In 2008, eggs were more likely male early in the season in two- but not three-egg clutches, and large eggs were more likely males late in the season. No egg/clutch traits predicted egg sex in 2007. Within-clutch egg mass asymmetry (the difference in egg mass between the first- and last-laid eggs) predicted sex in both years. In 2007, clutches with smaller egg mass variation were more likely to contain males, while in 2008 this relationship held for the last-laid egg and was reversed for the preceding egg(s). Laying order and sex of the previous egg did not predict egg sex, providing no evidence of sex-specific oocyte clustering. Thus, the relationships between egg sex and egg/clutch traits differed among years, suggesting a phenotypically plastic response of females to extrinsic conditions, and involved within-clutch egg mass asymmetry, a trait likely reflecting variation in maternal quality and/or reproductive tactics, which has been largely neglected in previous studies of sex allocation. 相似文献
96.
Carla da Silva Carneiro Eliane Teixeira Mársico Edgar Francisco Oliveira de Jesus Roberta de Oliveira Resende Ribeiro Renata de Faria Barbosa 《Chemistry and Ecology》2013,29(1):1-8
Trace elements were determined in fish and oysters from Sepetiba Bay, Brazil, by total reflection Xray fluorescence using synchrotron radiation (SRTXRF). Cr, Mn, Fe, Ni, Cu, Zn and Se were determined in fish muscles and organs and in oyster soft tissue. SRTXRF was shown to be a good tool for the analysis of trace elements from biological tissue samples. Overall, the levels of the analysed metals were higher in oysters than in the fish samples. Metals were not uniformly distributed throughout the body of the analysed fish. The detected concentrations of Cr, Zn and Se were very high in some samples, surpassing the maximum limits established by Brazilian legislation. 相似文献
97.
Gabi Drochioiu Karin Popa Doina Humelnicu Manuela Murariu Ion Sandu Alexandru Cecal 《毒物与环境化学》2013,95(2):221-235
A simple approach was carried out to study the effects of various parameters on high performance liquid chromatography (HPLC) performance of microcystin-LR (MC-LR) analysis in samples from some reservoirs and rivers in Taiwan under simulation conditions. Nature of column and its packing affected the instrument sensitivity. Varied column length indicated the longer column enhanced (C18, 5 μm, 4.6 × 150 mm) HPLC performance. Studies on mobile phase found that ratio and concentration of the mobile phase gradient greatly influenced the peak shape, retention time, and optimal conditions of mobile phase were set at acetonitrile and 0.01M ammonium acetate (30:70). Different compounds were added to mobile phase and their contribution to HPLC spectra was reported. Detection limits were carefully measured and reported. These investigations provide simple and important information that may be applied to HPLC performance for microcystin analysis from natural water systems. 相似文献
98.
Heavy metal content of edible plants collected close to an area of intense mining activity (southern Portugal) 总被引:2,自引:0,他引:2
Fernando H. Reboredo João Pelica Fernando C. Lidon José C. Ramalho Maria F. Pessoa Teresa Calvão Manuela Simões Mauro Guerra 《Environmental monitoring and assessment》2018,190(8):484
The Neves-Corvo mining complex (MC) situated in southern Portugal exploits one of the most world’s important copper deposits. Agricultural soils surrounding the MC, used by the inhabitants for crop production, contain excessive amounts of As, Cu, Pb, and Zn. Thus, a potential risk to human consumption exists if edible plants grow on these substrata. Arsenic and Pb were not detected in edible samples collected near the MC and 5 km away, but in the leaves—structural or adsorbed onto the surface. In general, Zn was the most mobile element in both contaminated and reference areas as seen by the bioaccumulation factors (BAF). The tolerable upper intake (TUI) values for Cu are a reason of concern, since in 57.1% of the cases, the TUI values are above the recommended upper limit of 5 mg/day, in the case of Ficus carica, Cucurbita pepo, and Phaseolus vulgaris, whereas in 28.6% of the cases, the TUI values are near this limit (C. pepo and Citrus x sinensis). The consumption of such vegetables from these areas must be banned or strongly reduced, since long-term accumulation of Cu can cause a chronic toxicity in humans. 相似文献
99.
Graziele Aparecida Fernandes da Cruz Débora de Jesus Pires Luiz Artur Mendes Bataus Rassan Dyego Romão Silva Mônica Santiago Barbosa Raylane Pereira Gomes Carla Afonso Silva Bitencourt Braga Lilian Carla Carneiro 《Environmental monitoring and assessment》2018,190(10):616
The objective of this study was to identify Z. indianus in PEJC and PESCAN. Listed are the following methods: to isolate bacteria from the integument of the Z. indianus species collected and to check the resistance of microorganisms to antibiotics. Collections of Z. indianus were performed in four seasons of the two parks. The results obtained suggest that the low amount of Z. indianus collected can be justified by environmental factors such as high average temperature and low average humidity. It is noted that there is a predominance of bacteria of the Enterobacteriaceae family found in both the PEJC and the PESCAN. The antibiogram performed for the isolated PEJC bacteria shows statistical significance when comparing the edge and inside values of the park. Studies with fungi were also carried out, and it was evidenced that Trichophyton spp. was the genus that most inhabited the two environments studied. The ability of fluconazole and ketoconazole to inhibit fungal growth was also investigated, and considering the concentration tested may suggest that they have good action spectra. Plasmid profile data show that 60% of antibiotic-resistant bacteria have plasmids. The values found show that Z. indianus can act as vectors of microorganisms that affect the healthy animals and humans and that these organisms may be influenced by seasons. 相似文献
100.
Francisco?Ríos Alejandro?Fernández-ArteagaEmail author Manuela?Lechuga Encarnación?Jurado Mercedes?Fernández-Serrano 《Environmental science and pollution research international》2016,23(9):8286-8293
This paper reports a study of the anaerobic biodegradation of non-ionic surfactants alkyl polyglucosides applying the method by measurement of the biogas production in digested sludge. Three alkyl polyglucosides with different length alkyl chain and degree of polymerization of the glucose units were tested. The influence of their structural parameters was evaluated, and the characteristics parameters of the anaerobic biodegradation were determined. Results show that alkyl polyglucosides, at the standard initial concentration of 100 mgC L?1, are not completely biodegradable in anaerobic conditions because they inhibit the biogas production. The alkyl polyglucoside having the shortest alkyl chain showed the fastest biodegradability and reached the higher percentage of final mineralization. The anaerobic process was well adjusted to a pseudo first-order equation using the carbon produced as gas during the test; also, kinetics parameters and a global rate constant for all the involved metabolic process were determined. This modeling is helpful to evaluate the biodegradation or the persistence of alkyl polyglucosides under anaerobic conditions in the environment and in the wastewater treatment. 相似文献