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81.
In this study, we investigated team‐based community service projects as action learning initiatives designed to facilitate two learning outcomes: community learning (knowledge of social, cultural, or economic issues) and personal learning (self‐awareness of managerial attitudes and abilities). We developed hypotheses to predict critical input conditions for action learning that promote community and personal learning. We tested these hypotheses with data collected from 381 MBA students and their team leaders who participated in a variety of community service projects. Results demonstrated that design conditions (task characteristics, social interactions, and affective responses) influenced community and personal learning differently. We supplemented survey results with interview and observational data from a subset of participants and conclude with a discussion of the theoretical implications for action learning and practical recommendations for designing community service programs. Copyright © 2001 John Wiley & Sons, Ltd. 相似文献
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Bigliardi Ana Paula Fernandes Caroline Lopes Feijo Pinto Edlaine Acosta dos Santos Marina Garcia Edariane Menestrino Baisch Paulo Roberto Martins Soares Maria Cristina Flores Muccillo-Baisch Ana Luíza da Silva Júnior Flavio Manoel Rodrigues 《Environmental science and pollution research international》2021,28(2):1409-1416
Environmental Science and Pollution Research - Coal extraction and processing generate environmental contamination, which has several negative impacts on human health. Hematological and biochemical... 相似文献
84.
Linley Chiwona-Karltun Franklin Amuakwa-Mensah Caroline Wamala-Larsson Salome Amuakwa-Mensah Assem Abu Hatab Nolwandle Made Nathan Kanuma Taremwa Lemayon Melyoki Lettice Kinunda Rutashobya Thulisile Madonsela Marna Lourens Wendy Stone Alfred R. Bizoza 《Ambio》2021,50(4):794
Like the rest of the world, African countries are reeling from the health, economic and social effects of COVID-19. The continent’s governments have responded by imposing rigorous lockdowns to limit the spread of the virus. The various lockdown measures are undermining food security, because stay at home orders have among others, threatened food production for a continent that relies heavily on agriculture as the bedrock of the economy. This article draws on quantitative data collected by the GeoPoll, and, from these data, assesses the effect of concern about the local spread and economic impact of COVID-19 on food worries. Qualitative data comprising 12 countries south of the Sahara reveal that lockdowns have created anxiety over food security as a health, economic and human rights/well-being issue. By applying a probit model, we find that concern about the local spread of COVID-19 and economic impact of the virus increases the probability of food worries. Governments have responded with various efforts to support the neediest. By evaluating the various policies rolled out we advocate for a feminist economics approach that necessitates greater use of data analytics to predict the likely impacts of intended regulatory relief responses during the recovery process and post-COVID-19. 相似文献
85.
Koenigbauer Josefine Theresia Henrich Wolfgang Girschick Gundula Entezami Michael Weichert Alexander Gabrysch Caroline Fangmann Laura Chaoui Rabih Gabriel Heinz-Peter 《黑龙江环境通报》2023,43(3):284-287
SMPD4 loss is a rare neurodevelopmental disorder that leads to severe mental and physical disability and early death in infancy. Most cases of this genetic condition have been diagnosed postnatally. This article focuses on the prenatal findings of affected fetuses. The phenotypes can include growth restriction, arthrogryposis (clenched hands, foot deformity), as well as cerebral abnormalities (simplified gyral pattern/lissencephaly, cerebellar hypoplasia, corpus callosum deformity). SMPD4 loss is detectable via exome sequencing. Here, two fetuses displayed a homozygotic pathogen variant in the SMPD4 gene, encoding for the enzyme Sphingomyelinase-4. Both parents were heterozygous carriers of the pathogenic variant. On detection of the above mentioned signs exome sequencing is indicated, with focus on the SMPD4 gene. 相似文献
86.
Schaffner U Ridenour WM Wolf VC Bassett T Müller C Müller-Schärer H Sutherland S Lortie CJ Callaway RM 《Ecology》2011,92(4):829-835
One commonly accepted mechanism for biological invasions is that species, after introduction to a new region, leave behind their natural enemies and therefore increase in distribution and abundance. However, which enemies are escaped remains unclear. Escape from specialist invertebrate herbivores has been examined in detail, but despite the profound effects of generalist herbivores in natural communities their potential to control invasive species is poorly understood. We carried out parallel laboratory feeding bioassays with generalist invertebrate herbivores from the native (Europe) and from the introduced (North America) range using native and nonnative tetraploid populations of the invasive spotted knapweed, Centaurea stoebe. We found that the growth of North American generalist herbivores was far lower when feeding on C. stoebe than the growth of European generalists. In contrast, North American and European generalists grew equally well on European and North American tetraploid C. stoebe plants, lending no support for an evolutionary change in resistance of North American tetraploid C. stoebe populations against generalist herbivores. These results suggest that biogeographical differences in the response of generalist herbivores to novel plant species have the potential to affect plant invasions. 相似文献
87.
Nicholas E. C. Fleming Jonathan D. R. Houghton Caroline L. Magill Chris Harrod 《Marine Biology》2011,158(9):2141-2146
Jellyfish are increasingly topical within studies of marine food webs. Stable isotope analysis represents a valuable technique
to unravel the complex trophic role of these long-overlooked species. In other taxa, sample preservation has been shown to
alter the isotopic values of species under consideration, potentially leading to misinterpretation of trophic ecology. To
identify potential preservation effects in jellyfish, we collected Aurelia aurita from Strangford Lough (54o22′44.73″N, 5o32′53.44″W) during May 2009 and processed them using three different methods prior to isotopic analysis (unpreserved, frozen
and preserved in ethanol). A distinct preservation effect was found on δ15N values: furthermore, preservation also influenced the positive allometric relationship between individual size and δ15N values. Conversely, δ13C values remained consistent between the three preservation methods, conflicting with previous findings for other invertebrate,
fish and mammalian species. These findings have implications for incorporation of jellyfish into marine food webs and remote
sampling regimes where preservation of samples is unavoidable. 相似文献
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Many organisms show differences between males and females in growth rate and crucial life history parameters, such as longevity.
Considering this, we may expect levels of toxic metabolic by-products of the respiratory chain, such as reactive oxygen species
(ROS), to vary with age and sex. Here, we analyse ROS levels in female Australian painted dragon lizards (Ctenophorus pictus) and their offspring using fluorescent probes and flow cytometry. Basal level of four ROS species (singlet oxygen, peroxynitrite,
superoxide and H2O2) measured with a combined marker, and superoxide measured specifically, varied significantly among families but not between
the sexes. When blood cells from offspring were chemically encouraged to accelerate the electron transport chain by mitochondrial
uncoupling, net superoxide levels were three times higher in daughters than sons (resulting in levels outside of the normal
ROS range) and varied among mothers depending on offspring sex (significant interaction between maternal identity and offspring
sex). In offspring, there were depressive effects on ROS of size-controlled relative clutch size, which relies directly on
circulating levels of vitellogenin, a confirmed antioxidant in some species. Thus, levels of reactive oxygen species varies
among females, offspring and in relation to reproductive investment in a manner that makes its regulatory processes likely
targets of selection. 相似文献