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PubMedDate not supplied

Exploring a life history of HIV disease and self-caring: Alfredo's story.

Alfredo's story is part of a larger phenomenological study of nursing, self care, and HIV disease that incorporated the anthropological tradition of reconstructing a life-story in the person's own words. This exemplar emphasizes Alfredo's shifts perspective organized around three turnings, or shifts in perspective, which are illustrated with narrative text and discussed. The three turnings include becoming HIV-infected, becoming a positive force, and reclaiming self. Implications for nursing include the importance of story telling in life history, the value of knowing the patient as a person, the positive impact of negative events, and the educational impact of a paradigm case.

Adaptation, Psychological↗
PubMed1998

Conducting a narrative analysis.

This paper describes the process of narrative analysis as undertaken within a nursing study on scholars and scholarship. If follows an earlier paper titled: Theoretical perspectives on narrative inquiry that described the influencing ideas of Bruner (1987) and Roof (1994) upon the same study. Analysis procedures are described here in sufficient detail for other researchers wishing to implement a similar approach to do so. The process as described has two main components: (A) strategies of 'core story creation' and 'employment'; and (B) issues and dilemmas of narrative analysis, especially relating to rigour. The ideas of Polkinghorne (1988), Mishler (1986), and Labov (in Mishler 1986a) are introduced in so far as they impinge upon the analysis process. These relate especially to the development of key terms, and to the analysis strategies of core story creation and employment. Outcomes of the study in question are termed 'Signposting the lived-world of scholarship'.

Attitude of Health Personnel↗
PubMed2001

Forging the links between metabolism and carcinogenesis.

Metabolism plays important roles in chemical carcinogenesis, both good and bad. The process of carcinogen metabolism was first recognized in the first half of the twentieth century and developed extensively in the latter half. The activation of chemicals to reactive electrophiles that become covalently bound to DNA and protein was demonstrated by Miller and Miller [Cancer 47 (1981) 2327]. Today many of the DNA adducts formed by chemical carcinogens are known, and extensive information is available about pathways leading to the electrophilic intermediates. Some concepts about the stability and reactivity of electrophiles derived from carcinogens have changed over the years. Early work in the field demonstrated the ability of chemicals to modulate the metabolism of carcinogens, a phenomenon now described as enzyme induction. The cytochrome P450 enzymes play a prominent role in the metabolism of carcinogens, both in bioactivation and detoxication. The conjugating enzymes can also play both beneficial and detrimental roles. As an example of a case in which several enzymes affect the metabolism and carcinogenicity of a chemical, aflatoxin B1 (AFB1) research has revealed insight into the myriad of reaction chemistry that can occur even with a 1s half-life for a reactive electrophile. Further areas of investigation involve the consequences of enzyme variability in humans and include areas such as genomics, epidemiology, and chemoprevention.

Aflatoxin B1↗
PubMed2000

The origins of the back-mutation assay method: a personal recollection.

The back-mutation assay method for determining the mutagenicity of various treatments was first developed a little over 50 years ago and has been in continuous use ever since. Shortly after the method was first used it became evident that certain factors of cell density, composition of media, etc., had to be carefully controlled to preserve an acceptable reliability of the method. A factor of particular importance was the suppression of growth of back-mutant prototrophic cells by the large number of auxotrophic cells present, a phenomenon which later became known as the "Grigg Effect." This review describes the origins of the back-mutation method and of the confounding competitive suppression phenomenon, the cause of competitive suppression, methods of diagnosing whether it is likely to bias the interpretation of a particular back-mutation experiment, and an experimental design which removes it entirely as a possible source of error. A number of other phenomena, such as phenotypic lag and coincident mutation associated with back-mutation, are also discussed as possible sources of error.

Animals↗
PubMedDate not supplied

Tribute to Georgeanna and Howard Jones.

This tribute is divided into three sections. The first of these is a description of six weeks of research involving Georgeanna and Howard Jones and me over a few weeks in Johns Hopkins in 1965. Initially, it describes details of preliminary work and then completion of the maturation programme of the mature human oocyte and the first serious attempts at IVF. Scientific discoveries in those exciting weeks contributed to the earliest beginnings of IVF. A second section on knowledge of the human preimplantation embryo today concentrates on the problem of poor-quality embryos and how to overcome it, and on new knowledge on the regulation of human embryonic development. Lastly, the ethics of assisted conception are debated in relation to early practice and to some international features of modern ethical adjudication. A brief conclusion describes some of the friendships initiated in Johns Hopkins and still intact today.

Baltimore↗
PubMed1989

Autobiographical memory. Sensitivity to age and education of a standardized enquiry.

A structured enquiry for assessing autobiographical memory is proposed. It is made up of three standardized time-cued sets of questions focusing on three life periods: adolescence, early and late adulthood, with five questions for each life period. Standardized testing procedure, checking for veracity and scoring methods are described. Normative data from 157 healthy individuals aged over 55 are converted into 'equivalent scores' for use with the enquiry and for diagnostic purposes. Education and ageing, but not sex, appear to be significant factors in the efficiency of retrieval from the autobiographic repertoire.

Aged↗
PubMed2003

Autobiographical memory and theory of mind: evidence of a relationship in schizophrenia.

BACKGROUND: It has been proposed that inferences about the mental states of others are drawn after a referral to autobiographical memory. This study explored the relationship between autobiographical memory retrieval and performance on tests of theory of mind in people with schizophrenia. METHOD: Fifty-nine people with a DSM-IV diagnosis of schizophrenia and 44 healthy participants matched for age, sex and estimated IQ were given the Autobiographical Memory Interview (AMI), two measures of theory of mind (ToM) and a logical memory test. RESULTS: There was clear evidence that the people with schizophrenia were under-performing on all tasks. Within the schizophrenia sample, robust relationships existed between the total scores achieved on the AMI and the ToM tasks. Furthermore, there was evidence that the participants with schizophrenia had a tendency to recollect odd or negative events when prompted by the standard questions of the AMI. CONCLUSIONS: The results of this study indicate that when people with schizophrenia attempt to think about the beliefs and intentions of others they use analogical reasoning. Whether this approach is also adopted by other clinical and normal adult groups is a question for future research.

Adult↗
PubMed2006

Autobiographical memory in non-amnesic alcohol-dependent patients.

BACKGROUND: Chronic alcohol abuse is associated with a wide range of cognitive deficits. However, little is known about memory for real-life events (autobiographical memory) in non-amnesic alcoholic patients. The purpose of this study was to investigate (a) non-amnesic alcoholics' ability to recall specific autobiographical memories and (b) their subjective experience when they access specific memories. METHOD: Twenty non-amnesic (without Korsakoff syndrome) recently detoxified alcoholics and 20 healthy controls completed the Autobiographical Memory Test (AMT), which assesses the frequency of specific (versus general) memories recalled in response to cue words, and the Memory Characteristics Questionnaire (MCQ), which assesses subjective experience (e.g. the amount of sensory and contextual details experienced) when remembering specific events. RESULTS: Alcoholic patients recalled specific memories less frequently and general memories more frequently than healthy controls. Nevertheless, when a specific past event was accessed, alcoholic patients subjectively experienced as many sensory and contextual details as controls. CONCLUSIONS: These findings suggest that non-amnesic alcoholics have difficulties strategically accessing event-specific autobiographical knowledge, which might result from changes in frontal lobe function that are associated with alcoholism.

Adult↗
PubMed2006

A prospective study of dysfunctional thinking and the regulation of negative intrusive memories in bipolar 1 disorder: implications for affect regulation theory.

BACKGROUND: Cognitive behavioural therapy (CBT) has been implemented in bipolar (BP) disorder with varying degrees of success. The link between CBT for BP disorder and underlying theory is not clear. There have been attempts to identify a unique style of dysfunctional thinking in BP disorder analogous to that in unipolar (UP) disorder but this has suffered from a dearth of prospective studies controlling for mood and phase of illness. In this prospective study, we have examined whether dysfunctional thinking and the (dys)regulation of traumatic memories are trait vulnerability factors in BP versus UP mood disorders. METHOD: BP-1 and UP groups were followed-up from acute episode to recovery, and compared with a healthy control group. Measures of dysfunctional thinking and linked personality dimensions were taken, together with measures assessing autobiographical memory retrieval (AMT). The presence and control of intrusive memories of traumatic events in BP and UP disorder were assessed. RESULTS: Controlling for mood symptoms and phase of illness, the BP (but not the UP) group was largely indistinguishable from controls on dysfunctional thinking. Intrusive memories of traumatic events were present in 45% of the BP and 48% of the UP groups; and those without intrusions were more overgeneral on the AMT in all phases of illness. CONCLUSION: These findings are in line with the 'affect regulation' hypothesis for UP disorder and deliberate self-harm. This may help in understanding the mode of action of CBT in BP disorder and to further improve the therapy, primarily through the promotion of affective regulation, which is one component of the complex CBT intervention for BP disorder.

Adolescent↗