The Quiet Call: A Grounded Theory Exploration of Vocational Development and Introversion in College Students

Vocational development is the process of understanding one’s calling through various internal and external influences. While vocation is an increasingly popular research topic, research has not addressed how one’s personality shapes his or her vocational development. Therefore, the purpose of the research was to explore the vocational development of introverted college students. Using a two-part qualitative study, 101 participants provided online essays, and 9 participants participated in face-to-face interviews in order to understand the influences and process of introverts seeking to discover their vocation. Results suggested various external and internal influences of vocational development, as well as the perceived relationship between vocation and introversion. Based on the results of the study, the Vocational Development Model for Introverts was created to explain the process introverted college students undergo to discern their calling. Implications for university faculty and staff members are discussed to inform and advise introverts in their vocational development

Vocational Development of Introverted College Students

While vocation is an increasingly popular research topic, research has not addressed how one’s personality shapes his or her vocational development. Therefore, the purpose of the research is to explore the vocational development of introverted college students. Using a two-part qualitative study, 101 participants provided online essays and nine participants participated in face-to-face interviews to understand the influences and process of introverts seeking to discover their vocation. Results suggested various external and internal influences of vocational development, as well as the perceived relationship between vocation and introversion. Based on the results of the study, the Vocational Development Model for Introverts was created to explain the process introverted college students undergo to discern their calling. Implications for university faculty and staff members are discussed to inform and advise introverts in their vocational development

Detection of Mitochondrial COII DNA Sequences in Ant Guts as a Method for Assessing Termite Predation by Ants

Termites and ants contribute more to animal biomass in tropical rain forests than any other single group and perform vital ecosystem functions. Although ants prey on termites, at the community level the linkage between these groups is poorly understood. Thus, assessing the distribution and specificity of ant termitophagy is of considerable interest.We describe an approach for quantifying ant-termite food webs by sequencing termite DNA (cytochrome c oxidase subunit II, COII) from ant guts and apply this to a soil-dwelling ant community from tropical rain forest in Gabon. We extracted DNA from 215 ants from 15 species. Of these, 17.2% of individuals had termite DNA in their guts, with BLAST analysis confirming the identity of 34.1% of these termites to family level or better. Although ant species varied in detection of termite DNA, ranging from 63% (5/7; Camponotus sp. 1) to 0% (0/7; Ponera sp. 1), there was no evidence (with small sample sizes) for heterogeneity in termite consumption across ant taxa, and no evidence for species-specific ant-termite predation. In all three ant species with identifiable termite DNA in multiple individuals, multiple termite species were represented. Furthermore, the two termite species that were detected on multiple occasions in ant guts were in both cases found in multiple ant species, suggesting that anttermite food webs are not strongly compartmentalised. However, two ant species were found to consume only Anoplotermes-group termites, indicating possible predatory specialisation at a higher taxonomic level. Using a laboratory feeding test, we were able to detect termite COII sequences in ant guts up to 2 h after feeding, indicating that our method only detects recent feeding events. Our data provide tentative support for the hypothesis that unspecialised termite predation by ants is widespread and highlight the use of molecular approaches for future studies of ant-termite food webs

Purinergic mechanisms in the control of gastrointestinal motility

For many years, ATP and adenosine have been implicated in movement regulation of the gastrointestinal tract. They act through three major receptor subtypes: adenosine or P1 receptors, P2X receptors and P2Y receptors. Each of these major receptor types can be subdivided into several different classes and is widely distributed amongst various neurons, muscle types, glia and interstitial cells that regulate intestinal functions. Several key roles for the different receptors and their endogenous ligands have been identified in physiological and pharmacological studies. For example, adenosine acting at A1 receptors appears to inhibit intestinal motility in various pathological conditions. Similarly, ATP acting at P2Y receptors is an important component of inhibitory neuromuscular transmission, acting as a cotransmitter with nitric oxide. ATP acting at P2X and P2Y1 receptors is important for synaptic transmission in simple descending excitatory and inhibitory reflex pathways. Some P2Y receptor subtypes prefer uridine nucleotides over purine nucleotides. Thus, roles for UTP and UDP as enteric transmitters in place of ATP cannot be excluded. ATP also appears to be important for sensory transduction, especially in chemosensitive pathways that initiate local inhibitory reflexes. Despite this evidence, data are lacking about the roles of either adenosine or ATP in more complex motility patterns such as segmentation or the interdigestive migrating motor complex. Clarification of roles for purinergic transmission in these common, but understudied, motility patterns will depend on the use of subtype-specific antagonists that in some cases have not yet been developed