Exposure of man to chemical agents can occur intentionally, as in the treatment of disease, or inadvertently because the environment contains a wide range of synthetic or naturally occurring chemicals. The alkylating agents are a diverse group of compounds (Fig. 1) and comprise a good example of such xenobiotics, since much is known about their occurrence, and their biological effects include carcinogenicity, mutagenicity, toxicity and teratogenicity.Exposure to potentially carcinogenic alkylating agents such as nitrosamines may occur occupationally, from cigarette smoke, from (...) certain foodstuffs and even endogenously through the ingestion of the appropriate precursor chemicals.1 At the other extreme, the cytotoxic effects of agents such as the chloroethylating nitrosamides or mustards have been exploited in the design of certain antitumour drugs.2 The effectiveness of antitumour agents and the other, mostly adverse, biological effects of alkylating agents have been ascribed to their ability to damage cellular macromolecules, in particular DNA. This review concentrates on investigations carried out over the past two years on the role of DNA damage in carcinogenesis, but we shall see how recent advances in this area of research have also led to a better understanding of the mechanisms of the cytotoxic effects of alkylating antitumour agents. (shrink)

In Chapter 2 of the Philosophical Fragments, Søren Kierkegaard’s pseudonym Johannes Climacus poetises about a “king who loved a maiden.” Climacus concludes this venture with a bold claim: what he has just described is “so different from any human poem” that it should not be regarded as a poem at all, but as “the wonder” [Vidunderet] which leads one to exclaim in adoration that “[t]his thought did not arise in my own heart!” In the subsequent chapter of Philosophical Fragments, Climacus (...) proceeds to offer a number of arguments against demonstrations of God’s existence, leading many scholars to conclude that he represents an unequivocally anti-rationalist perspective. Against such interpretations, this paper will seek to highlight how Climacus’ claims track those of the seventeenth century Dutch lens-grinder and rationalist philosopher, Baruch Spinoza. From this, it will be argued that “the wonder” in Climacus’ thought takes the form of an indirect, ethico-existentialist argument for the truth of Christianity’s incarnate God. (shrink)

At the end of the prayer with which he begins Works of Love (1847), Søren Kierkegaard notes that while ‘works of love’ might normally be viewed as a subset of worthwhile human endeavours or ‘works’, from heaven's perspective no work can be pleasing unless it is a work of love. From this arises the question—which Kierkegaard himself moves swiftly to address—of what distinguishes a work of ‘love’ from other, non-loving works? In this article, and with particular reference to Jacob Boehme (...) (1575–1624), I highlight how Kierkegaard's answer to this question draws upon the theological tradition that Bernard McGinn has called ‘the mysticism of the ground’. (shrink)

IntroductionBisphenol A is highly debated and studied in relation to a variety of health outcomes. This large variation in the literature makes BPA a topic that is prone to selective use of literature, in order to underpin one’s own findings and opinion. Over time, selective use of literature, by means of citations, can lead to a skewed knowledge development and a biased scientific consensus. In this study, we assess which factors drive citation and whether this results in the overrepresentation of (...) harmful health effects of BPA.MethodsA citation network analysis was performed to test various determinants of citation. A systematic search identified all relevant publications on the human health effect of BPA. Data were extracted on potential determinants of selective citation, such as study outcome, study design, sample size, journal impact factor, authority of the author, self-citation, and funding source. We applied random effect logistic regression to assess whether these determinants influence the likelihood of citation.ResultsOne hundred sixty-nine publications on BPA were identified, with 12,432 potential citation pathways of which 808 citations occurred. The network consisted of 63 cross-sectional studies, 34 cohort studies, 29 case-control studies, 35 narrative reviews, and 8 systematic reviews. Positive studies have a 1.5 times greater chance of being cited compared to negative studies. Additionally, the authority of the author and self-citation are consistently found to be positively associated with the likelihood of being cited. Overall, the network seems to be highly influenced by two highly cited publications, whereas 60 out of 169 publications received no citations.ConclusionIn the literature on BPA, citation is mostly driven by positive study outcome and author-related factors, such as high authority within the network. Interpreting the impact of these factors and the big influence of a few highly cited publications, it can be questioned to which extent the knowledge development in human literature on BPA is actually evidence-based. (shrink)

The writings of English poet and mystic Thomas Traherne (1626–1674) remain a relatively underexplored reservoir. Traherne's technological context includes the invention of the telescope (1608) as well as the microscope (c. 1590). As will become evident in this article, Traherne's expositions on creation display an imagination that is adept at placing itself behind both types of lenses. This article focuses on Traherne's treatment of two types of insects—the fly and the ant—in order to extrapolate some of the insights that can (...) be gleaned from Traherne's writings for the ontological status of all nonhuman animals. (shrink)

Background. Informed consent (IC) is not only a regulatory but also an ethical requirement to participate in any clinical trial. It is essential to determine that research participants understand what they consent to. Studies that evaluate participants’ understanding of IC conclude that recall and understanding of IC is often low, and researchers recommend that interactive multimedia interventions should be implemented to optimise understanding. Objectives. To assess participants’ understanding of IC of the research trial that they agreed to participate in.Methods. A (...) descriptive survey design, within a quantitative research approach, was used to conduct the study at two government hospitals in the Eastern Cape Province. A semi-structured, self-administered questionnaire was used to collect information from 170 participants in research studies. Descriptive statistics were used to analyse the results.Results. Participants were recruited from among women who enrolled in any of the three studies that were ongoing at the two sites during the recruitment period. The study participants had a mean age of 25.9 years. Nearly one-third (30%) could not recall the purpose of the original trial that they consented to. The concept of randomisation was not understood by any of the participants.Conclusion. Regardless of extensive efforts to ensure that participants understood their participation, this study unveiled poor recall of essential information on IC. It is proposed that IC should be short and only address essential components such as purpose, procedure, possible risks or benefits, alternative options if not participating and explaining the concept of voluntary participation. (shrink)

This chapter provides a summary of the lessons that the Austrian theory of capital holds for the field of development economics. It provides an introduction to the concepts of the structure of production and time preference and a brief overview of how the rate of time preference limits both the available pool of savings and the extent of capital formation. The implications that this uniquely Austrian insight holds for the theory of economic growth are spelled out, in particular the fact (...) that what constrains the growth of developing countries is not the availability of technology but the availability of savings to undertake investment. The chapter also provides a brief exposition of the concept of capital heterogeneity and its implications for the impossibility of economic calculation under a system of central planning. A critique of some popular models that advocate planning as a means of economic development is also provided. (shrink)

The development of a content-full Christian bioethics requires an analysis of the particular contents and traditions which different Christians bring to morality. For Hauerwas, the content of Christian ethics is the speech and practices of the community. For Engelhardt, only a content-full tradition, such as the Orthodox tradition, will be able to arrive at closure on the moral issues presented by the contemporary practice of medicine. Capaldi calls, in contrast, for a Kantian society of autonomous self-legislators whose responsible freedom is (...) grounded in a cosmic order that must be explicated and retrieved in particular practices. The manner in which we view our own traditions and the shortcomings of modernity determine the content that Christianity brings to bioethics. (shrink)

In this first volume of original essays on rhetorical criticism to appear in many years, the authors stress active engagement in the critical process. Bearing in mind the complaint frequently leveled at rhetorical criticism—that method as method has taken precedence over understanding and appreciation—the editors encouraged innovation, and the contributors responded by moving beyond the merely theoretical to explore implications through implied criticism, participating in the activity rather than merely talking about it. Consequently, these essays avoid further lamentation over the (...) current state of the art and concentrate instead on constructive presentations. Not only do the essays add significantly to knowledge about rhetorical criticism, but they also serve liberal education by helping to bring understanding, discrimination, and appreciation to the entire process of human communication. (shrink)

G. P. Meredith; XIII—Words as Instruments, Proceedings of the Aristotelian Society, Volume 62, Issue 1, 1 June 1962, Pages 241–260, https://doi.org/10.1093/aris.

Plotinus (204/5–270 CE) was the first and greatest of Neoplatonic philosophers. His writings were edited by his disciple Porphyry, who published them sometime between 301 and 305 CE in six sets of nine treatises each (Enneads), with a biography of his master in which he also explains his editorial principles.

I Want to talk about a strong sense of the terms ‘predict’, ‘prediction’, ‘predictability’, and so on; to take up the question whether a social science may aspire to predict in the strong sense; and to consider some bearings of this question on the free-will problem.