Type II DNA topoisomerase activity is required to change DNA topology. It is important in the relaxation of DNA supercoils generated by cellular processes, such as transcription and replication, and it is essential for the condensation of chromosomes and their segregation during mitosis. In mammals this activity is derived from at least two isoforms, termed DNA topoisomerase IIα and β. The α isoform is involved in chromosome condensation and segregation, whereas the role of the β isoform is not yet clear. (...) DNA topoisomerase IIβ was first reported in 1987. Here we review the research on DNA topoisomerase IIβ over the last 10 years. BioEssays 20:215–226, 1998.© 1998 John Wiley & Sons, Inc. (shrink)

Hesperides Press are republishing these classic works in affordable, high quality, modern editions, using the original text and artwork.

Discussion about whether adolescents ought to be able to consent for their own vaccines long predates the COVID-19 pandemic. Providers have been counseling self-identified vaccine skeptics for year...

The ArgumentIt is often observed by historians of postwar American art that painters and sculptors of the 1960s sought a more mechanized “look” for their art. I argue that the changes reflected in the art have their source in a deeper shift – a shift at the level of production, expressed in new studio practices as well as in the space of the artworks themselves.In the period immediately before, during, and after World War II, the dominant topos of the American (...) artist was that of a solitary genius, alone in his studio, sole witness to the miraculous creation of his art. I demonstrate that artists of the 1960s, against this backdrop of heroic modernism, engaged in a different rhetoric and practice, one based on the models of industry and business. The studio of Andy Warhol, named the “Factory,” is viewed as apodictic of this great change, with its rudimentary assembly line and highly social mode of production.The change in practice instantiated in Warhol's Factory is significant in and of itself, but I argue further that it expressed itself in the “place of knowledge” – the space within Warhol's paintings and objects, and the newly social space in which they signify. The context for that signification thus becomes crucial to our understanding of the “Warhol phenomenon” celebrated in popular and arthistorical texts. The ambivalencies embedded in Warhol's Factory, where the artist's role oscillated between manager and proletarian worker, are seen as a function of their context. Conflicting signals are also broadcast by the works of art, which speak in the dialect of mass production with the accent of the irreplaceably unique. (shrink)

Corporate reputation is decisive for stakeholders’ supporting or repelling behavior and, therefore, one of firms’ most valuable intangible resources. Drawing on signaling theory, this paper focuses on the usefulness of voluntarily provided corporate reputation disclosures (CRDs) and examines their impact on stakeholders’ attitudinal and behavioral outcomes. Our experimental vignette studies reveal that CRDs reduce stakeholders’ information asymmetries, which positively affects perceived organizational performance and corporate reputation as well as stakeholders’ purchase, investment, and employment intentions. The relationships between CRDs and stakeholders’ (...) behavioral intentions are sequentially mediated by changes in the perceived organizational performance and corporate reputation. This implies that stakeholders use the signals transmitted by CRDs to adjust their perceptions of a firm’s organizational performance and corporate reputation, which ultimately induces their behavioral outcomes. Overall, our empirical results show the usefulness of CRDs for firms in effectively developing stakeholder relationships and, thereby, contributing to assure their going concern. For stakeholders, CRDs improve efficiency in evaluating a firm’s future development. (shrink)

Experience offers a reading experience like no other. A heat-sensitive cover by Olafur Eliasson reveals words, colors, and a drawing when touched by human hands. Endpapers designed by Carsten Holler are printed in ink containing carefully calibrated quantities of the synthesized human pheromones estratetraenol and androstadienone, evoking the suggestibility of human desire. The margins and edges of the book are designed by Tauba Auerbach in complementary colors that create a dynamically shifting effect when the book is shifted or closed. When (...) the book is opened, bookmarks cascade from the center, emerging from spider web prints by Tomas Saraceno. Experience produces experience while bringing the concept itself into relief as an object of contemplation. The sensory experience of the book as a physical object resonates with the intellectual experience of the book as a container of ideas. Experience convenes a conversation with artists, musicians, philosophers, anthropologists, historians, and neuroscientists, each of whom explores aspects of sensorial and cultural realms of experience. The texts include new essays written for this volume and classic texts by such figures as William James and Michel Foucault -- Provided by the publisher. (shrink)

Recent literature on J. G. Fichte's ethical philosophy has tended to focus on a handful of interpretive issues while simultaneously emphasizing his under-appreciated relevance to contemporary moral theory. In this regard, Kosch's book on Fichte's ethics is similar to other recent publications. In almost every other way, however, it is unique. Kosch uses her talent for clear argumentation to propose several theses that have little precedent in Fichte scholarship.Her book's goal is two-fold: first, to fill a "yawning gap" in Fichte (...) scholarship by addressing aspects of Fichte's ethical system that have been misinterpreted or overlooked, and second, to present Fichte's ethical work to philosophers "who would be... (shrink)

Fichte’s Ethical Thought follows a format familiar to those who have read Allen Wood’s books on the ethical thought of Immanuel Kant and G. W. F. Hegel: Wood integrates Johann Gottlieb Fichte’s work into topical chapters, each discussing an important component of Fichte’s ethical system. The text he focuses on, of course, is Fichte’s 1798 System of Ethics, but Fichte scholars will likely be pleased to find that Wood discusses a wide range of Fichte’s Jena-era writings. Wood makes use of (...) Addresses to the German Nation, The Closed Commercial State, and earlier works such as Some Lectures Concerning the Scholar’s Vocation, especially in the final two chapters, which cover Fichte’s thought on public life, the... (shrink)

Several studies have demonstrated that individuals’ ability to perceive a speech sound contrast is related to the production of that contrast in their native language. The theoretical account for this relationship is that speech perception and production have a shared multimodal representation in relevant sensory spaces. This gives rise to a prediction that individuals with more narrowly defined targets will produce greater separation between contrasting sounds, as well as lower variability in the production of each sound. However, empirical studies that (...) tested this hypothesis, particularly with regard to variability, have reported mixed outcomes. The current study investigates the relationship between perceptual ability and production ability, focusing on the auditory domain. We examined whether individuals’ categorical labeling consistency for the American English /ε/–/æ/ contrast, measured using a perceptual identification task, is related to distance between the centroids of vowel categories in acoustic space and to two measures of production variability: the overall distribution of repeated tokens for the vowels and the proportional within-trial decrease in variability as defined as the magnitude of self-correction to the initial acoustic variation of each token. No significant associations were found between categorical labeling consistency and vowel contrast distance, between categorical labeling consistency and area of the ellipse, or between categorical labeling consistency and centering ratio. These null results suggest that the perception-production relation may not be as robust as suggested by a widely adopted theoretical framing in terms of the size of auditory target regions. However, the present results may also be attributable to choices in implementation that should be subject to further investigation. (shrink)

We define an easily verifiable notion of an atomic formula having uniformly bounded arrays in a structure M. We prove that if T is a complete L-theory, then T is mutually algebraic if and only if there is some model M of T for which every atomic formula has uniformly bounded arrays. Moreover, an incomplete theory T is mutually algebraic if and only if every atomic formula has uniformly bounded arrays in every model M of T.

Clinical ethics consultants face a wide range of ethical dilemmas that require broad knowledge and skills. Although there is considerable overlap with the approach to adult consultation, ethics consultants must be aware of differences when they work with infant, pediatric, and adolescent cases. This article addresses unique considerations in the pediatric setting, reviews foundational theories on parental authority, suggests practical approaches to pediatric consultation, and outlines current available resources for clinical ethics consultants who wish to deepen their skills in this (...) area. (shrink)

The content of dreams and changes to the self were investigated in students moving to University. In study 1, 20 participants completed dream diaries and memory tasks before and after they had left home and moved to university, and generated self images, “I am…” statements , reflective of their current self. Changes in “I ams” were observed, indicating a newly-formed ‘university’ self. These self, images and related autobiographical knowledge were found to be incorporated into recent dreams but not into dreams (...) from other periods. Study 2 replicated these findings in a different sample . We suggest that these data reflect a period of self-consolidation in which new experiences and self images are incorporated into autobiographical memory knowledge structures representing personal goals during sleep. (shrink)

This article reviews the phenomena of disordered discourse often manifested in schizophrenia. It argues that the Structure Building Framework, a model of the general cognitive processes and mechanisms underlying discourse, can be used to account for these phenomena. According to the Structure Building Framework, the goal of comprehension is to build coherent mental representations or structures. Building a mental structure involves several component subprocesses: laying a foundation, mapping relevant information onto that foundation, and shifting to initiate a new substructure. Building (...) a mental structure also involves at least two general cognitive mechanisms: enhancement of relevant activation and suppression of irrelevant or inappropriate activation. We suggest that schizophrenics who exhibit verbose disordered discourse have inefficient suppression mechanisms, are impaired in laying a foundation, and tend to shift too often. We also speculate that schizophrenics who exhibit impoverished disordered discourse have inefficient enhancement mechanisms and are impaired with the cognitive process of mapping. (shrink)

Results: We analyzed 1,402 surveys and 15 in-depth interviews. Many (32%) CL participants reported greater difficulty refilling medications and a minority (14%) reported greater difficulty accessing HIV care during the pandemic. Most (99%) Opt4Mamas participants reported no difficulty refilling medications or accessing HIV/pregnancy care. Among the CL participants, older women were less likely (aOR = 0.95, 95% CI: 0.92–0.98) and women with more children were more likely (aOR = 1.13, 95% CI: 1.00–1.28) to report difficulty refilling medications. Only 2% of (...) CL participants reported greater difficulty managing FP and most (95%) reported no change in likelihood of using FP or desire to get pregnant. Qualitative analysis revealed three major themes: (1) adverse organizational/economic implications of the pandemic, (2) increased importance of pregnancy prevention during the pandemic, and (3) fear of contracting COVID-19. (shrink)

Learning a novel environment involves integrating first-person perceptual and motoric experiences with developing knowledge about the overall structure of the surroundings. The present experiments provide insights into the parallel development of these egocentric and allocentric memories by intentionally conflicting body- and world-centered frames of reference during learning, and measuring outcomes via online and offline measures. Results of two experiments demonstrate faster learning and increased memory flexibility following route perspective reading (Experiment 1) and virtual navigation (Experiment 2) when participants begin exploring (...) the environment on a northward (vs. any other direction) allocentric heading. We suggest that learning advantages due to aligning body-centered (left/right/forward/back) with world-centered (NSEW) reference frames are indicative of three features of spatial memory development and representation. First, memories for egocentric and allocentric information develop in parallel during novel environment learning. Second, cognitive maps have a preferred orientation relative to world-centered coordinates. Finally, this preferred orientation corresponds to traditional orientation of physical maps (i.e., north is upward), suggesting strong associations between daily perceptual and motor experiences and the manner in which we preferentially represent spatial knowledge. (shrink)