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排序方式: 共有200条查询结果,搜索用时 78 毫秒
131.
Angsumita Pramanick Abhiram Kanneganti Jing Lin Jeslyn Wong Sarah Weiling Li Pooja Sharma Dimri Aniza Puteri Mahyuddin Sailesh Kumar Sebastian Enrique Illanes Jerry Kok Yen Chan Lin Lin Su Arijit Biswas Paul Anantharajah Tambyah Ruby Yun-Ju Huang Citra Nurfarah Zaini Mattar Mahesh Choolani 《黑龙江环境通报》2021,41(8):1018-1035
There are over 50 SARS-CoV-2 candidate vaccines undergoing Phase II and III clinical trials. Several vaccines have been approved by regulatory authorities and rolled out for use in different countries. Due to concerns of potential teratogenicity or adverse effect on maternal physiology, pregnancy has been a specific exclusion criterion for most vaccine trials with only two trials not excluding pregnant women. Thus, other than limited animal studies, gradually emerging development and reproductive toxicity data, and observational data from vaccine registries, there is a paucity of reliable information to guide recommendations for the safe vaccination of pregnant women. Pregnancy is a risk factor for severe COVID-19, especially in women with comorbidities, resulting in increased rates of preterm birth and maternal morbidity. We discuss the major SARS-CoV-2 vaccines, their mechanisms of action, efficacy, safety profile and possible benefits to the maternal-fetal dyad to create a rational approach towards maternal vaccination while anticipating and mitigating vaccine-related complications. Pregnant women with high exposure risks or co-morbidities predisposing to severe COVID-19 infection should be prioritised for vaccination. Those with risk factors for adverse effects should be counselled accordingly. It is essential to support patient autonomy by shared decision-making involving a risk-benefit discussion with the pregnant woman. 相似文献
132.
We explore the topic of restorative justice in organizations. The tradition of restorative justice directs attention to the aftermath of wrongdoing. We highlight three ways offenders (making amends), victims (extending forgiveness), and organizations (fostering reintegration) restore justice in the workplace. Our paper concludes with questions for future research and inquiry. Copyright © 2009 John Wiley & Sons, Ltd. 相似文献
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A number of agricultural and engineering uses for fixated flue gas desulfurization (FGD) material exist; however, the potential for leaching of hazardous elements has limited widespread application and the processes controlling the leaching of this material are poorly understood. In this study, a flow-through rotating-disk system was applied to elucidate the relative importance of bulk diffusion, pore diffusion, and surface chemical reaction in controlling the leaching of fixated FGD material under pH conditions ranging from 2.2 to 6.8. Changing the hydrodynamics in the rotating disk system did not affect the leaching kinetics at both pH 2.2 and 6.8, indicating that bulk diffusion was not the kinetic-limiting step. Application of the shrinking core model (SCM) to the data suggested a surface reaction-controlled mechanism, rather than a pore diffusion mechanism. The leaching of fixated FGD material increased with decreasing pH, suggesting it can be described by a combination of an intrinsic hydration reaction and a proton-promoted dissolution reaction. X-ray diffraction (XRD) and elemental composition analyses before and after leaching suggests that for most elements a number of solid phases controlled the leaching process. 相似文献
135.
Although new theoretical models that are suggestive of how work design might be used to foster proactive motivation and proactive performance have been proposed, these models need further elaboration and testing if they are to be useful tools for contemporary organizations. Accordingly, we examine the extent to which feelings of responsibility for constructive change is a proactive psychological mechanism that explains how work design characteristics influence constructive change‐oriented behavior and proactive performance. Specifically, we examine job autonomy, position in the organizational hierarchy, access to resources, access to strategy‐related information, and role ambiguity as antecedents to felt responsibility for constructive change (FRCC). We also examine the extent to which feelings of responsibility for constructive change are positively related to voice behavior (i.e., constructive, change‐oriented communication) and continuous improvement (i.e., proactive role performance). Results indicate hierarchical position and access to resources are positively related to FRCC. Results also indicate proactive personality moderates the relationship between access to resources and FRCC and the relationship between access to strategy‐related information and FRCC. Plots of the interactions reveal that these relationships are enhanced for individuals with proactive personalities. The results also indicate that FRCC is positively related to voice behavior and continuous improvement. Perhaps more importantly, the results suggest that FRCC explains the psychological process by which structural and socio‐structural forces influence proactive behavior. The results are discussed as they pertain to updated work design theory and theories of high involvement work systems, job characteristics, and leadership prototypes. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献
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/ Norms are defined as evaluative standards regarding individual behavior or conditions in a given context. They define what behavior should be, rather than actual behavior. Norm prevalence refers to the proportion of individuals in a population who can articulate a norm in a given evaluation context. This paper empirically examines the prevalence of encounter norms in 56 evaluation contexts. Data for this comparative analysis were obtained from 30 studies that used a single-item question asking recreationists to indicate the highest number of encounters they would tolerate before the experience changed. Four predictor variables were examined: (1) type of resource, (2) type of activity, (3) type of encounter, and (4) question response format. As anticipated, norm prevalence varied by type of resource (backcountry or frontcountry), type of encounter (no conflict versus conflict), and question response format (two-category implicit, two-category explicit, and three-category). These three independent variables explained 64% of the variance in norm prevalence. Also as hypothesized, there was no relationship between type of activity (consumptive or nonconsumptive) and norm prevalence. Implications for future research and management are discussed; it is argued that prevalence is an important characteristic of social norms. 相似文献
138.
We explored relationships of water quality parameters with landscape pattern metrics (LPMs), land use-land cover (LULC) proportions, and the advanced very high resolution radiometer (AVHRR) normalized difference vegetation index (NDVI) or NDVI-derived metrics. Stream sites (271) in Nebraska, Kansas, and Missouri were sampled for water quality parameters, the index of biotic integrity, and a habitat index in either 1994 or 1995. Although a combination of LPMs (interspersion and juxtaposition index, patch density, and percent forest) within Ozark Highlands watersheds explained >60% of the variation in levels of nitrite-nitrate nitrogen and conductivity, in most cases the LPMs were not significantly correlated with the stream data. Several problems using landscape pattern metrics were noted: small watersheds having only one or two patches, collinearity with LULC data, and counterintuitive or inconsistent results that resulted from basic differences in land use-land cover patterns among ecoregions or from other factors determining water quality. The amount of variation explained in water quality parameters using multiple regression models that combined LULC and LPMs was generally lower than that from NDVI or vegetation phenology metrics derived from time-series NDVI data. A comparison of LPMs and NDVI indicated that NDVI had greater promise for monitoring landscapes for stream conditions within the study area. 相似文献
139.
Soluble reactive phosphorus (SRP) in northwestern Ohio river water has declined over the past 20 yr in response to decreased applications of fertilizer P. Our objective was to evaluate changes in soluble P (Bray-1 P) levels in the soil over time as influenced by fertilizer P management, cultivation practice, soil properties, and landscape factors. Because soil is the intermediary between added P and SRP measured in river water, we examined the relationship between fertilizer P, soluble soil P, and SRP. Using historical soil survey sample sites as a baseline for original soluble P concentrations (Por), we resampled Ap horizons to establish current levels of soluble P (Pcu). The Por baseline extended from 1953-1982 and Pcu from 1996-1998. Thirty percent of the Pcu values and 17% of the Por values were > or = 40 mg kg(-1). Log-transformed means for Pcu were significantly higher than for Por. The principal determining factors for Por were physiography, soil texture, and soil series. Current P is affected by present tillage practice and drainage class. Change in soluble P in the soil is not as responsive to fertilizer P sales as is SRP in river water. This suggests that as fertilizer P sales decline, a declining percentage of P added as fertilizer is annually dissolved and transported into the drainage system. Soluble P in soil is governed by a combination of fertilizer and tillage management, soil properties, and landscape factors interacting over time. 相似文献
140.