Search results for "adaptation"
showing 10 items of 1775 documents
Cultural fusion theory : An alternative to acculturation
2016
ABSTRACTThis article lays out a theoretical framework for cultural fusion theory. This theory borrows from various theoretical frameworks to provide a more realistic description of the immigrant experience. Specifically, cultural fusion theory describes how newcomers acculturate into the dominant culture and maintain aspects of their minority culture, while at the same time the dominant or host culture also fuses aspects off the newcomer’s culture into the dominant culture to create a fused intercultural identity. Boundary conditions, assumptions, axioms, and theorems are presented to define cultural fusion theory.
Tourism and climate change: impacts, adaptation and mitigation
2014
In recent years, climate change has caused a set of disasters and economic troubles for the globalized economy. This book presents a clear diagnosis of the climate change dilemma for industrial and...
WISING UP: THE EVOLUTION OF NATURAL THEOLOGY
2012
This essay is in response to Professor Celia Deane-Drummond's 2012 Boyle lectures. The first part calls attention to the value and significance of her “sophianic theo-drama hypothesis” for the contemporary engagement between Christian theology and evolutionary science. In a sense, her proposal itself is a religious “adaptation” to changes within an international, interdisciplinary academic environment. The second part of the essay explores the rapidly shrinking “niche” of Christian natural theology and briefly summarizes an alternative set of hypotheses from the biocultural sciences of religion.
‘Don’t ever mix God with sports’: Christian religion in athletes’ stories of life transitions
2019
Sport psychology researchers have increasingly recognized the need to adopt a holistic perspective when seeking to understand athletes’ adaptation to life transitions. The present study sought to understand how religion influences athletes’ journeys in sport and experiences of life transitions. Two Christian elite athletes participated in life story interviews which we analyzed via narrative analysis. Although the participants narratively separated religious belief from sport, religion, as a source of basic world assumptions and values, provided a broader framework of meaning and continuity in their sport lives. Yet, both stories involved a growing distance to institutional religious practi…
Differential expression of Cryptosporidium parvum genes encoding sporozoite surface antigens in infected HCT-8 host cells.
2006
Intracellular replication of Cryptosporidium parvum (Apicomplexa) involves the generation of several asexual and sexual forms of the parasite. During the stage conversions, complex mechanisms lead to differential structural and functional properties of the parasite. These require a well tuned gene transcription machinery. For the first time the gene expression of four surface proteins of C. parvum sporozoites, CP15, CP17, P23, and GP900 were analysed in parallel by reverse transcription polymerase chain reaction. In addition, CP17 and P23 antigens were detected in infected host cells by immunofluorescence using antisera raised against recombinant forms of the proteins. The results show that…
The Diapause Lipidomes of Three Closely Related Beetle Species Reveal Mechanisms for Tolerating Energetic and Cold Stress in High-Latitude Seasonal E…
2020
During winter insects face energetic stress driven by lack of food, and thermal stress due to sub-optimal and even lethal temperatures. To survive, most insects living in seasonal environments such as high latitudes, enter diapause, a deep resting stage characterized by a cessation of development, metabolic suppression and increased stress tolerance. The current study explores physiological adaptations related to diapause in three beetle species at high latitudes in Europe. From an ecological perspective, the comparison is interesting since one species (Leptinotarsa decemlineata) is an invasive pest that has recently expanded its range into northern Europe, where a retardation in range expa…
Preservation of genetic and regulatory robustness in ancient gene duplicates of Saccharomyces cerevisiae
2014
[EN] Biological systems remain robust against certain genetic and environmental challenges. Robustness allows the exploration of ecological adaptations. It is unclear what factors contribute to increasing robustness. Gene duplication has been considered to increase genetic robustness through functional redundancy, accelerating the evolution of novel functions. However, recent findings have questioned the link between duplication and robustness. In particular, it remains elusive whether ancient duplicates still bear potential for innovation through preserved redundancy and robustness. Here we have investigated this question by evolving the yeast Saccharomyces cerevisiae for 2200 generations …
The Physcomitrella genome reveals evolutionary insights into the conquest of land by plants
2008
We report the draft genome sequence of the model moss Physcomitrella patens and compare its features with those of flowering plants, from which it is separated by more than 400 million years, and unicellular aquatic algae. This comparison reveals genomic changes concomitant with the evolutionary movement to land, including a general increase in gene family complexity; loss of genes associated with aquatic environments (e.g., flagellar arms); acquisition of genes for tolerating terrestrial stresses (e.g., variation in temperature and water availability); and the development of the auxin and abscisic acid signaling pathways for coordinating multicellular growth and dehydration response. The …
Checkpoint adaptation in repair-deficient cells drives aneuploidy and resistance to genotoxic agents
2018
AbstractHuman cancers frequently harbour mutations in DNA repair genes, rendering the use of DNA damaging agents as an effective therapeutic intervention. As therapy-resistant cells often arise, it is important to better understand the molecular pathways that drive resistance in order to facilitate the eventual targeting of such processes. We employ repair-defective diploid yeast as a model to demonstrate that, in response to genotoxic challenges, nearly all cells eventually undergo checkpoint adaptation, resulting in the generation of aneuploid cells with whole chromosome losses that have acquired resistance to the initial genotoxic challenge. We demonstrate that adaptation inhibition, eit…
Fitness drift of an atrazine-degrading population under atrazine selection pressure.
2008
International audience; Pseudomonas sp. ADP harbouring the atrazine catabolic plasmid ADP1 was subcultured in liquid medium containing atrazine as sole source of nitrogen. After approximately 320 generations, a new population evolved which replaced the initial population. This newly evolved population grew faster and degraded atrazine more rapidly than the initial population. Plasmid profiles and Southern blot analyses revealed that the evolved strain, unlike the ancestral strain, presented a tandem duplication of the atzB gene encoding the second enzyme of the atrazine catabolic pathway responsible for the transformation of hydroxyatrazine to N-isopropylammelide. This duplication resulted …