Our Environmental Value Orientations Influence How We Respond to Climate Change

People variably respond to global change in their beliefs, behaviors, and grief (associated with losses incurred). People that are less likely to believe in climate change, adopt pro-environmental behaviors, or report ecological grief are assumed to have different psycho-cultural orientations, and do not perceive changes in environmental condition or any impact upon themselves. We test these assumptions within the context of the Great Barrier Reef (GBR), a region currently experiencing significant climate change impacts in the form of coral reef bleaching and increasingly severe cyclones. We develop knowledge of environmental cultural services with the Environmental Schwartz Value Survey (ESVS) into four human value orientations that can explain individuals’ environmental beliefs and behaviors: biospheric (i.e., concern for environment), altruistic (i.e., concern for others, and intrinsic values), egoistic (i.e., concern for personal resources) and hedonic values (i.e., concern for pleasure, comfort, esthetic, and spirituality). Using face-to-face quantitative survey techniques, where 1,934 residents were asked to agree or disagree with a range of statements on a scale of 1–10, we investigate people’s (i) environmental values and value orientations, (ii) perceptions of environmental condition, and (iii) perceptions of impact on self. We show how they relate to the following climate change responses; (i) beliefs at a global and local scale, (ii) participation in pro-environmental behaviors, and (iii) levels of grief associated with ecological change, as measured by respective single survey questions. Results suggest that biospheric and altruistic values influenced all climate change responses. Egoistic values were only influential on grief responses. Perception of environmental change was important in influencing beliefs and grief, and perceptions of impact on self were only important in influencing beliefs. These results suggest that environmental managers could use people’s environmental value orientations to more effectively influence climate change responses toward environmental stewardship and sustainability. Communications that target or encourage altruism (through understanding and empathy), biospherism (through information on climate change impacts on the environment), and egoism (through emphasizing the benefits, health and wellbeing derived from a natural resource in good condition), could work.

Rapid survey protocol that provides dynamic information on reef condition to managers of the Great Barrier Reef

Managing to support coral reef resilience as the climate changes requires strategic and responsive actions that reduce anthropogenic stress. Managers can only target and tailor these actions if they regularly receive information on system condition and impact severity. In large coral reef areas like the Great Barrier Reef Marine Park (GBRMP), acquiring condition and impact data with good spatial and temporal coverage requires using a large network of observers. Here, we describe the result of ~10 years of evolving and refining participatory monitoring programs used in the GBR that have rangers, tourism operators and members of the public as observers. Participants complete Reef Health and Impact Surveys (RHIS) using a protocol that meets coral reef managers' needs for up-to-date information on the following: benthic community composition, reef condition and impacts including coral diseases, damage, predation and the presence of rubbish. Training programs ensure that the information gathered is sufficiently precise to inform management decisions. Participants regularly report because the demands of the survey methodology have been matched to their time availability. Undertaking the RHIS protocol we describe involves three ~20 min surveys at each site. Participants enter data into an online data management system that can create reports for managers and participants within minutes of data being submitted. Since 2009, 211 participants have completed a total of more than 10,415 surveys at more than 625 different reefs. The two-way exchange of information between managers and participants increases the capacity to manage reefs adaptively, meets education and outreach objectives and can increase stewardship. The general approach used and the survey methodology are both sufficiently adaptable to be used in all reef regions.

Liquid injection atomic layer deposition of silver nanoparticles

Silver nanoparticles are being developed for applications in plasmonics, catalysts and analytical methods, amongst others. Herein, we demonstrate the growth of silver nanoparticles using an atomic layer deposition (ALD) process for the first time. The silver was deposited from pulses of the organometallic precursor (hfac)Ag(1,5-COD) ((hexafluoroacetylacetonato)silver(I)(1,5-cyclooctadiene)) dissolved in a 0.1 M toluene solution. Catalytic oxidative dehydrogenation of the silver was achieved using intermittent pulses of propanol. The effect of substrate temperature on the size and distribution of nanoparticles has been investigated over the temperature range 110-150 degrees C. Transmission electron microscopy reveals that the nanoparticles consist of face centred cubic, facetted silver crystallites. The localized surface plasmon modes of the nanoparticles have been investigated using electron energy loss spectroscopy mapping. The distributions of plasmons within the ALD nanoparticles are comparable to those grown by solution methods. Both dipolar and quadrupolar resonant modes are observed, which is consistent with previous discrete dipole approximation models. Energy loss mapping of a loss feature at 8.1 eV reveals that it correlates with the bulk or volume region of the silver nanoparticles investigated here.

A strategic framework for responding to coral bleaching events in a changing climate

The frequency and severity of mass coral bleaching events are predicted to increase as sea temperatures continue to warm under a global regime of rising ocean temperatures. Bleaching events can be disastrous for coral reef ecosystems and, given the number of other stressors to reefs that result from human activities, there is widespread concern about their future. This article provides a strategic framework from the Great Barrier Reef to prepare for and respond to mass bleaching events. The framework presented has two main inter-related components: an early warning system and assessment and monitoring. Both include the need to proactively and consistently communicate information on environmental conditions and the level of bleaching severity to senior decision-makers, stakeholders, and the public. Managers, being the most timely and credible source of information on bleaching events, can facilitate the implementation of strategies that can give reefs the best chance to recover from bleaching and to withstand future disturbances. The proposed framework is readily transferable to other coral reef regions, and can easily be adapted by managers to local financial, technical, and human resources.

Saccharomyces cerevisiae samples stained with FUN-1 dye can be stored at ?20�C for later observation

FUN-1, a fluorescent vital dye, has been observed to form cylindrical intravacuolar structures within the vacuoles of metabolically active yeast cells. FUN-1 staining, which begins as a diffuse pool of fluorescent cytoplasmic stain, uses an unknown endogenous biochemical processing mechanism to compact and form orange-red cylindrical intravacuolar structures within the cell vacuole. In the clinical setting, FUN-1 is primarily used for identification of fungal infection. FUN-1 is utilized in the laboratory to distinguish between metabolically active and dead fungal cells. Although this stain is useful for distinguishing between live and dead fungal dead cells, few studies have utilized this chemical. This lack of use in the scientific community may be due to the requirement that cells are visualized directly after staining. Thus, it would be of interest to be able to stain cells and store them for later use. Our lab examined the longevity of cylindrical intravacuolar structures in two strains of Saccharomyces cerevisiae stained with FUN-1 and stored at -20 degrees C. We found that cylindrical intravacuolar structures could be reliably observed and imaged utilizing differential interference contrast microscopy and fluorescence microscopy for 21 days. We also observed that cells stained with FUN-1 would resume propagation on yeast extract, peptone, dextrose (YPD) plates after being frozen at -20 degrees C for 21 days. These modifications to the published procedure for FUN-1 dye staining should allow for a more prevalent and less time sensitive use of this important biological tool.

Comparing bleaching and mortality responses of hard corals between southern Kenya and the Great Barrier Reef, Australia

We compared the bleaching and mortality response (BMI) of 19 common scleractinian corals to an anomalous warm-water event in 1998 to determine the degree of variation between depths, sites, and regions. Mombasa corals experienced a greater temperature anomaly than those on the Great Barrier Reef (GBR) sites and this was reflected in the greater BMI response of most taxa. Comparing coral taxa in different sites at the same depth produced high correlation coefficients in the bleaching response in Kenya at 2 m (r=0.86) and GBR at 6 m depth sites (r=0.80) but less in the GBR for shallow 2 m sites (r=0.49). The pattern of taxa susceptibility was remarkably consistent between the regions. Coral taxa explained 52% of the variation in the response of colonies to bleaching between these two regions (Kenya BMI=0.90 GBR BMI+26; F(1,19) - 18.3; p < 0.001; r2 = 0.52). Stylophora and Pocillopora were consistently susceptible while Cyphastrea, Goniopora Galaxea and Pavona were resistant in both regions. Three taxa behaved differently between the two regions; Acropora, and branching Porites were both moderately affected on the GBR but were highly affected in Kenya while the opposite was true for Pavona. These results suggest that a colonies response to bleaching is phylogenetically constrained, emphasizing the importance of features of the host's physiology or morphology in determining the response to thermal stress.

Detection of high levels of congenital transmission of Toxoplasma gondii in natural urban populations of Mus domesticus

The relative importance of different transmission routes of Toxoplasma gondii has been a matter for debate. This ubiquitous parasite is generally thought to be transmitted by infective oocysts excreted by the definitive host, the cat. Ingestion of undercooked meat has also been considered an important route of transmission in many mammals while congenital transmission has generally been considered relatively rare. Experimental studies demonstrate the ability of T. gondii to be transmitted congenitally, but few studies have investigated the frequency of this transmission route in natural populations. We use PCR amplification of the SAG1 gene to investigate the frequency of congenital transmission in a wild population of mice (Mus domesticus) and show that congenital transmission is occurring in 75% of pregnancies in this population. Furthermore, for infected pregnant mice, transmission occurs to at least one foetus in 100% of cases while variable penetrance of congenital infection is observed. These high levels of congenital transmission in this wild population of mice, taken together with other recent data on congenital transmission in sheep, suggests that this phenomenon might be more widespread than previously thought.

Ethical challenges in community-based research

Investigators in population-based studies confront unique ethical challenges due to the community context of their research, their methods of inquiry, and the implications of their findings for social groups. Issues surrounding requirements for informed consent, the protection of privacy and confidentiality, and relationships between investigators and participants take on greater complexity and have significance beyond the individual research subject. In this paper, ethical challenges associated with community-based epidemiological research are briefly examined. We argue that ethically responsible population-based studies must seriously consider community needs and priorities and that researchers should work collaboratively with local populations to implement study goals. Strategies that promote respect for populations in community-based studies are outlined. These include community participation in research development, implementation and interpretation; adequate provision of information about study objectives to community members; and systematic feedback of study results.

Ethical challenges in community-based research

Investigators in population-based studies confront unique ethical challenges due to the community context of their research, their methods of inquiry, and the implications of their findings for social groups. Issues surrounding requirements for informed consent, the protection of privacy and confidentiality, and relationships between investigators and participants take on greater complexity and have significance beyond the individual research subject. In this paper, ethical challenges associated with community-based epidemiological research are briefly examined. We argue that ethically responsible population-based studies must seriously consider community needs and priorities and that researchers should work collaboratively with local populations to implement study goals. Strategies that promote respect for populations in community-based studies are outlined. These include community participation in research development, implementation and interpretation; adequate provision of information about study objectives to community members; and systematic feedback of study results.

The difference that culture can make in end-of-life decisionmaking

Cultural difference has been largely ignored within bioethics, particularly within the end-of-life discourses and practices that have developed over the past two decades in the U.S. healthcare system. Yet how should culture—specifically cultural differences as reflected among groups defined as ethnically or racially different—be taken into account?

Teaching anthropology in the medical curriculum

Practicing medicine well requires recognizing the breadth of human experience and attending to the psychological and sociocultural dimensions of patients as well as their physical needs. Central to the concerns of anthropology are the shared beliefs and values expressed in social practices and traditions that give meaning to everyday life. The relevance of anthropology for biomedical practice and research is grounded in the discipline's emphasis on contextual meaning and its unique strategies for data gathering. In this article, we briefly review the field of anthropology and the discipline of medical anthropology. We argue for incorporating anthropological concepts and methods in medical training, and summarize anthropology's role in medical education over the past century. Finally, we present ideas for including anthropology in the medical curriculum, proposing curricular goals and content, and teaching settings and techniques. An anthropological orientation can foster trainee self-awareness, help trainees prepare for the diverse perspectives they will encounter in our pluralistic society, and facilitate critical analysis of biomedicine and its systems of care.

Neonatal viability in the 1990s: held hostage by technology

The emergence of new obstetrical and neonatal technologies, as well as more aggressive clinical management, has significantly improved the survival of extremely low birth weight (ELBW) infants. This development has heightened concerns about the limits of viability. ELBW infants, weighing less than 1,000 grams and no larger than the palm of one's hand, are often described as “miracles” of late twentieth century technology. Improved survivability of ELBW infants has provided opportunities for long-term follow-up. Information on their physical and emotional development contributes to developing standards of practice regarding their care.

Cultural and psychological dimensions of human organ transplantation

Human organ transplantation is practiced in local cultural worlds that shape beliefs about appropriate conduct for its development and application. The psychological response of individuals to the transplant experience mediate and condition its life-changing force in the context of family and community. In this paper, three cases are examined to illustrate the impact of cultural and psychological influences on human organ replacement therapies. First, we explore brain death and its implications for the definition of death and the procurement of organs. A case example from Japan provides the framework for addressing the cultural foundations that contribute to perceptions of personhood and the treatment of the body. Second, we examine marketing incentives for organ donation using a case from India where, until recently, explicit forms of financial incentives have played a role in the development of renal transplantation involving non-related living donors. Third, we focus on the psychological remifications of organ transplantation using a case that demonstrates the profound experience of being the recipient of the "gift of life". Resolution of scientific and ethical challenges in the field of organ transplantation must consider the complex and significant impact of cultural and psychological factors on organ replacement therapies.

Method optimization: determination of histamine in fish by capillary zone electrophoresis

Capillary zone electrophoretic (CZE) methods are gradually gaining acceptance for quantitative analyses in testing laboratories. However, some procedures are often instrument and operator dependent. Modifications to a published procedure for the routine determination of histamine in fish by CZE in our laboratory were necessary to compensate for a different instrument design and set of operating conditions. The major change was to add an internal standard (imidazole) and to use this to assist in peak identification and quantification. The instrument repeatability data for area calculation and migration time variation (CV for area calculation 2.9%, n = 20; CV for migration time variation 0.2%, n = 20) for a fish containing 100 mg/kg histamine were acceptable when the internal standard parameters were factored into the calculations. The levels of histamine in fish were in good agreement with the fluorimetric method currently used in our laboratory. A limit of reporting of 10 mg/kg was achieved by maximizing the sample size/capillary column internal diameter (i.d.) and optimizing instrumental operating parameters.

Redox-sensitive homodimerization of Pex11p: a proposed mechanism to regulate peroxisomal division

Pex11p (formerly Pmp27) has been implicated in peroxisomal proliferation (Erdmann, R., and G. Blobel. 1995. J. Cell Biol. 128; 509-523; Marshall, P.A., Y.I. Krimkevich, R.H. Lark, J.M. Dyer, M. Veenhuis, and J.M. Goodman, 1995. J. Cell Biol. 129; 345-355). In its absence, peroxisomes in Saccharomyces cerevisiae fail to proliferate in response to oleic acid; instead, one or two large peroxisomes are formed. Conversely, overproduction of Pex11p causes an increase in peroxisomal number. In this report, we confirm the function of Pex11p in organelle proliferation by demonstrating that this protein can cause fragmentation in vivo of large peroxisomes into smaller organelles. Pex11p is on the inner surface of the peroxisomal membrane. It can form homodimers, and this species is more abundant in mature peroxisomes than in proliferating organelles. Removing one of the three cysteines in the protein inhibits homodimerization. This cysteine 3-->alanine mutation leads to an increase in number and a decrease in peroxisomal density, compared with the wild-type protein, in response to oleic acid. We propose that the active species is the "monomeric" form, and that the increasing oxidative metabolism within maturing peroxisomes causes dimer formation and inhibition of further organelle division.

The ethics of caring for conjoined twins. The Lakeberg twins

In June 1993, conjoined twin Amy and Angela Lakeberg became the focus of national attention. They shared a complex six-chambered heart and one liver; only one could survive separation surgery; and even her chances were slim. The medical challenge was great and the ethical challenges were even greater.

Marketing human organs: the autonomy paradox

The severe shortage of organs for transplantation and the continual reluctance of the public to voluntarily donate has prompted consideration of alternative strategies for organ procurement. This paper explores the development of market approaches for procuring human organs for transplantation and considers the social and moral implications of organ donation as both a "gift of life" and a "commodity exchange." The problematic and paradoxical articulation of individual autonomy in relation to property rights and marketing human body parts is addressed. We argue that beliefs about proprietorship over human body parts and the capacity to provide consent for organ donation are culturally constructed. We contend that the political and economic framework of biomedicine, in western and non-western nations, influences access to transplantation technology and shapes the form and development of specific market approaches. Finally, we suggest that marketing approaches for organ procurement are and will be negotiated within cultural parameters constrained by several factors: beliefs about the physical body and personhood, religious traditions, economic conditions, and the availability of technological resources.

The Candida boidinii peroxisomal membrane protein Pmp30 has a role in peroxisomal proliferation and is functionally homologous to Pmp27 from Saccharomyces cerevisiae

The mechanism of peroxisome proliferation is poorly understood. Candida boidinii is a methylotrophic yeast that undergoes rapid and massive peroxisome proliferation and serves as a good model system for this process. Pmp30A and Pmp30B (formerly designated Pmp31 and Pmp32, respectively) are two closely related proteins in a polyploid strain of this yeast that are strongly induced by diverse peroxisome proliferators such as methanol, oleate, and D-alanine. The function of these proteins is not understood. To study this issue, we used a recently described haploid strain (S2) of C. boidinii that can be manipulated genetically. We now report that strain S2 contains a single PMP30 gene very similar in sequence (greater than 93% identity at the DNA level) to PMP30A and PMP30B. When PMP30 was disrupted, cell growth on methanol was greatly inhibited, and cells grown in both methanol and oleate had fewer, larger, and more spherical peroxisomes than wild-type cells. A similar phenotype was recently described for Saccharomyces cerevisiae cultured on oleate in which PMP27, which encodes a protein of related sequence that is important for peroxisome proliferation, was disrupted. To determine whether Pmp27 is a functional homolog of Pmp30, gentle complementation was performed. PMP30A was expressed in the PMP27 disruptant of S. cerevisiae, and PMP27 was expressed in the PMP30 disruptant of C. boidinii S2. Complementation, in terms of both cell growth and organelle size, shape, and number, was successful in both directions, although reversion to a wild-type phenotype was only partial for the PMP30 disruptant. We conclude that these proteins are functional homologs and that both Pmp30 and Pmp27 have a direct role in proliferation and organelle size rather than a role in a specific peroxisomal metabolic pathway of substrate utilization.

Pmp27 promotes peroxisomal proliferation

Peroxisomes perform many essential functions in eukaryotic cells. The weight of evidence indicates that these organelles divide by budding from preexisting peroxisomes. This process is not understood at the molecular level. Peroxisomal proliferation can be induced in Saccharomyces cerevisiae by oleate. This growth substrate is metabolized by peroxisomal enzymes. We have identified a protein, Pmp27, that promotes peroxisomal proliferation. This protein, previously termed Pmp24, was purified from peroxisomal membranes, and the corresponding gene, PMP27, was isolated and sequenced. Pmp27 shares sequence similarity with the Pmp30 family in Candida boidinii. Pmp27 is a hydrophobic peroxisomal membrane protein but it can be extracted by high pH, suggesting that it does not fully span the bilayer. Its expression is regulated by oleate. The function of Pmp27 was probed by observing the phenotype of strains in which the protein was eliminated by gene disruption or overproduced by expression from a multicopy plasmid. The strain containing the disruption (3B) was able to grow on all carbon sources tested, including oleate, although growth on oleate, glycerol, and acetate was slower than wild type. Strain 3B contained peroxisomes with all of the enzymes of beta-oxidation. However, in addition to the presence of a few modestly sized peroxisomes seen in a typical thin section of a cell growing on oleate-containing medium, cells of strain 3B also contained one or two very large peroxisomes. In contrast, cells in a strain in which Pmp27 was overexpressed contained an increased number of normal-sized peroxisomes. We suggest that Pmp27 promotes peroxisomal proliferation by participating in peroxisomal elongation or fission.

Cross-cultural considerations in clinical ethics consultations

Cross-cultural encounters between patients and physicians are now commonplace. Although increasing attention has been given to cultural issues in clinical medicine, there has been little discussion of cultural differences presenting as ethical dilemmas. We report four cases in which such differences led to requests for ethics consultations. In analyzing these cases, we identify four elements that are essential for successful resolution of such dilemmas: (1) an ability to communicate effectively with patients and their families; (2) a sufficient understanding of the patient's cultural background; (3) identification of culturally relevant value conflicts; and (4) a willingness to pursue discussion of the ethical dilemma until a compromise is reached or an otherwise satisfactory resolution of the problem is achieved. We conclude with several practical guidelines for clinicians facing ethical dilemmas in cross-cultural interactions with patients.

Medical students' first-person narratives of a patients story of AIDS

Fourth year U.S. medical students' first-person narratives of a patient's experience of AIDS are analyzed using a conceptual framework that builds on the interactive model of narrative critique. Relational and affective convergence and, conversely, relational and affective dissonance, reveal imaginative reconstructions of emotional and interactional themes depicted in the patient's original story. Attention is focused on representations of isolation, contamination, shame and fear. Elements of indeterminacy and openness in the patient's description of his experience with AIDS provided students with opportunities to create an imagined response to HIV infection in their own narratives. The narratives describe social interaction that is tainted and constrained by the presence of infection and its associated stigma. The emotional content of the student narratives portrays an affective landscape that resonates. elaborates and, in some cases, distorts the feelings expressed in the patient's story. The narratives call attention to the way in which individual meanings are externalized, objectified and projected onto a socially and morally salient 'other'. Using the first-person narrative approach in the seminar on AIDS proved to be an effective method of sensitizing students to the experience of living with HIV infection. The challenge for medical educators lies in creating opportunities for students to develop increased empathy toward individuals with AIDS.

Pharmacy computer prescription databases: methodologic issues of access and confidentiality

OBJECTIVE

To examine methodologic issues of access and confidentiality regarding the use of pharmacy computer prescription databases (PCPDs) for participant selection to receive mailed, self-administered, hypertensive quality-of-life survey outside a primary-care setting.

DESIGN

Two separate PCPD searches by pharmacist owners for patients prescribed at least one of 130 potential antihypertensive medications. The first PCPD used a nonrandom sample of all patients (n = 635); the second PCPD used a random sample (n = 100) of three specific antihypertensive drug groups. Research protocol was approved by the investigators' institutional review board.

SETTING

Two independent, privately owned PCPDs.

PATIENTS OR OTHER PARTICIPANTS

Individuals prescribed at least 1 of 130 PCPD medications potentially used in antihypertensive treatment.

INTERVENTIONS

Individually addressed cover letter on pharmacy letterhead signed by a pharmacist requesting voluntary completion of the enclosed, self-administered, opinion survey on quality of life.

MAIN OUTCOME MEASURE

Anonymous survey return to off-site post office box in envelope provided.

RESULTS

Favorable or no opposition to PCPD methodology from pharmacist or participants. Ethical opposition was encountered when incorporating PCPD sampling technique into grant proposal.

CONCLUSIONS

The American Pharmaceutical Association Code of Ethics is used as a basis to provide recommendations to examine and justify PCPD investigative use. Increasing availability of PCPD technology encourages more efficient and easier methods of research strategy. PCPD use, however, demands identical stringent guidelines used in traditional research and raises potential issues regarding pharmacist-patient confidentiality as well as the right of PCPD use by others.

Role of xanthine dehydrogenase and oxidase in focal cerebral ischemic injury to rat

The role of xanthine dehydrogenase and oxidase as a source of free radicals contributing to focal cerebral ischemic injury was evaluated in Long-Evans rats after the middle cerebral artery was permanently occluded and both carotid arteries were clamped for 90 min. The fraction of xanthine dehydrogenase present as the free radical producing oxidase increased slightly from 22% in control cortex to 30% in the ischemic right cortex during the first 3 h of reperfusion and then remained relatively unchanged over the next 24 h. This increase may in part be due to entrapped plasma, which contained 4.5 +/- 0.8 nmol.min-1.ml-1 xanthine oxidase entirely in the free radical-producing form. Infarct volume was unaffected by pretreatment with 50 mg allopurinol/kg per day over 3 days before surgery but was decreased by 8% with 100 mg/kg and 24% with 150 mg/kg of allopurinol (P less than 0.05). However, inhibition of xanthine oxidase by dietary depletion of the essential molybdenum cofactor increased infarct volume by 19%, suggesting that protection by allopurinol at higher dosages was independent of xanthine oxidase inhibition. Neither xanthine oxidase present in rat brain nor circulating in plasma appears to be the primary source of oxygen radicals that contributes to infarction in focal cerebral ischemia.

Temperature-sensitive mutations at the carboxy terminus of the alpha subunit of the Escherichia coli F1F0 ATP synthase

Mutations were constructed in the a subunit of the F1F0 ATP synthase from Escherichia coli. Truncated forms of this subunit showed a temperature sensitivity phenotype. We conclude that the carboxy terminus of the a subunit is not involved directly with proton translocation but that it has an important structural role.

Cultural influences on perceived quality of life

Cross-cultural investigations of quality of life will provide a more well-rounded picture of the multidimensional aspects of life satisfaction and personal well-being. Careful attention must be given to the nuances of language and sociocultural context in the translation of questionnaires and the implementation of cross-national research. Future explorations of the concept of quality of life should incorporate qualitative and ethnographic data to insure an adequate representation of the social and emotional context surrounding perceptions of well-being and life satisfaction. A meaning-centered approach to the examination of quality of life will facilitate understanding of the nature of wellness and the impact of illness on individuals and families of every cultural background.

Patients' fear of contracting the acquired immunodeficiency syndrome from physicians

This study investigates patients' concern about the human immunodeficiency virus transmission from their physician during the course of routine medical care. We examined patients' fear of acquired immunodeficiency syndrome (AIDS), knowledge of human immunodeficiency virus transmission, level of comfort with medical procedures performed by a physician suspected of having AIDS, perceived risk of AIDS transmission in physician-patient interactions, and the desire to be informed of the human immunodeficiency virus status of physicians. Three hundred fifty patients attending a university-based outpatient center in a large midwestern city were surveyed. Findings show that, as fear of AIDS increases, so does reported level of discomfort with procedures conducted by a physician suspected of having AIDS. Fear of AIDS was inversely correlated with knowledge. Patient concerns regarding susceptibility to the human immunodeficiency virus infection in routine care call attention to the need for education about transmission of AIDS in the health care context.

Apparent hydroxyl radical production by peroxynitrite: implications for endothelial injury from nitric oxide and superoxide

Superoxide dismutase reduces injury in many disease processes, implicating superoxide anion radical (O2-.) as a toxic species in vivo. A critical target of superoxide may be nitric oxide (NO.) produced by endothelium, macrophages, neutrophils, and brain synaptosomes. Superoxide and NO. are known to rapidly react to form the stable peroxynitrite anion (ONOO-). We have shown that peroxynitrite has a pKa of 7.49 +/- 0.06 at 37 degrees C and rapidly decomposes once protonated with a half-life of 1.9 sec at pH 7.4. Peroxynitrite decomposition generates a strong oxidant with reactivity similar to hydroxyl radical, as assessed by the oxidation of deoxyribose or dimethyl sulfoxide. Product yields indicative of hydroxyl radical were 5.1 +/- 0.1% and 24.3 +/- 1.0%, respectively, of added peroxynitrite. Product formation was not affected by the metal chelator diethyltriaminepentaacetic acid, suggesting that iron was not required to catalyze oxidation. In contrast, desferrioxamine was a potent, competitive inhibitor of peroxynitrite-initiated oxidation because of a direct reaction between desferrioxamine and peroxynitrite rather than by iron chelation. We propose that superoxide dismutase may protect vascular tissue stimulated to produce superoxide and NO. under pathological conditions by preventing the formation of peroxynitrite.

Response of microbial adhesives and biofilm matrix polymers to chemical treatments as determined by interference reflection microscopy and light section microscopy

The polymers involved in the adhesion of Pseudomonas fluorescens H2S to solid surfaces were investigated to determine whether differences between cell surface adhesives and biofilm matrix polymers could be detected. Two optical techniques, i.e., interference reflection microscopy (IRM) and light section microscopy (LSM), were used to compare the responses of the two types of polymer to treatment with electrolytes, dimethyl sulfoxide (DMSO), and Tween 20. To evaluate initial adhesive polymers, P. fluorescens H2S cells were allowed to attach to glass cover slip surfaces and were immediately examined with IRM, and their response to chemical solutions was tested. With IRM, changes in cell-substratum separation distance between 0 and ca. 100 nm are detectable as changes in relative light intensity of the image; a contraction of the polymer would be detected as a darkening of the image, whereas expansion would appear as image brightening. To evaluate the intercellular polymer matrix in biofilms, 3-day-old biofilms were exposed to similar solutions, and the resultant change in biofilm thickness was measured with LSM, which measures film thicknesses between 10 and 1,000 microns. The initial adhesive and biofilm polymers were similar in that both appeared to contract when treated with electrolytes and to expand when treated with Tween 20. However, with DMSO treatment, the initial adhesive polymer appeared to contract, whereas there was no change in thickness of the biofilm polymer. These results indicate that both polymers bear acidic groups and thus act electrostatically with cations and are able to enter into hydrophobic interactions.(ABSTRACT TRUNCATED AT 250 WORDS)

Accumulation of collagen and altered fiber-type ratios as indicators of abnormal muscle gene expression in the mdx dystrophic mouse

The growth and development of the X-linked muscular dystrophy mutant mouse (mdx) was compared with a control group from 3 weeks to 1 year old. Quantitative cytological analysis of the soleus muscle revealed cycles of degeneration, regeneration, and hypertrophy, and at any one time it was difficult to assess the extent of the disease based on muscle fiber size. One noticeable difference even in the youngest muscles studied was the reduced numbers of slow oxidative fibers and the increased number of fast glycolytic fibers in the mdx soleus muscles. The collagen of the connective tissue components of selectively stained sections was determined by computerized image analysis. Marked accumulation of collagen was found in both the endomysium and perimysium of the dystrophic muscles as compared with age-matched controls. Since the mdx mouse is a result of the same type of genetic defect as in human Duchenne muscular dystrophy, this model could thus be used to assess the effectiveness of various therapeutic approaches, including gene therapy using muscle fibrosis and fiber type proportions as the indicators.

A sensitive fluorometric assay for measuring xanthine dehydrogenase and oxidase in tissues

The conversion of xanthine dehydrogenase to a free radical producing oxidase is an important component of oxygen-mediated tissue injury. Current assays for these enzymes are of limited sensitivity, making it difficult to analyze activities in organ biopsies or cultured cells. The xanthine oxidase-catalyzed conversion of pterin (2-amino-4-hydroxypteridine) to isoxanthopterin provides the basis for a fluorometric assay which is 100-500 times more sensitive than the traditional spectrophotometric assay of urate formation from xanthine. Enzyme activity as low as 0.1 pmol min-1 ml-1 can be measured with the fluorometric pterin assay. Xanthine oxidase is assayed in the presence of pterin only, while combined xanthine dehydrogenase plus oxidase activity is determined with methylene blue which replaces NAD+ as an electron acceptor. The relative proportions and specific activities of xanthine oxidase and dehydrogenase determined by the fluorometric pterin assay are comparable with the spectrophotometric measurement of activities present in rat liver, intestine, kidney, and plasma. The assay has been successfully applied to brain, human kidney, and cultured mammalian cells, where xanthine dehydrogenase and oxidase activities are too low to detect spectrophotometrically.

Protein synthesis in tissues of fed and starved carp, acclimated to different temperatures

The temperature dependence of the rates of protein synthesis in the red and white skeletal muscle of the carp (Cyprinus carpio) was measured using a method which involved a single injection of tritiated phenylalanine. Plasma and muscle-free phenylalanine quickly reached a plateau level at all temperatures. During the plateau phase the incorporation of label into protein was liner. Muscle from fish previously acclimated to either a low temperature (8°C) or a high temperature (28°C), showed marked differences in the rates of protein synthesis. The results show that cold acclimation is associated with significantly higher rates of protein synthesis (p<0.001) in both red and white muscle. Arrhenius activation energies, derived from the rates of protein synthesis at the different experimental temperatures, were similar for both red and white muscle in fish acclimated to warm or cold temperatures. Measurements for both acclimated groups over the temperature range 8-34°C showed that the activation energy for the process of protein synthesis was 86.7 kJ/mol and 78.7 kJ/mol for the red and white muscle respectively.

Differentiation of muscle and the determination of ultimate tissue size

The factors that determine ultimate muscle size have been studied using a "model" that involves two strains of mice, which had been especially bred for "largeness" (QL) and for "smallness" (QS). The difference in muscle size was not found to be due to a difference in fibre size, but due to a difference in fibre number. The muscles from the "QL" mice contained about 30% more fibres. The reason for this increased fibre number was investigated. During early development, the fusion of mononucleated presumptive myoblasts to form multinucleated myotubes took place at the same time in both "QL" and "OS" mice, as indicated by the appearance and increase in activity of ATP: creatine phosphotransferase. At this stage fibre (and cell) number and size could be determined by measuring nuclear number and protein/DNA ratio respectively. No difference in fibre (and cell) size could be found in mice at 5 days before birth, newly born, or at 20 days of age. At these ages it was found that the muscles from the "QL" mice contained a greater number of nuclei (muscle cells). The amount of RNA/nucleus was used as an index of protein synthetic rate, and no difference could be found between the large mice and the small mice. It was concluded that, in the case of the "QL" mice, the increased fibre number was not brought about by: (i) a delay in time of fusion of presumptive myoblasts; (ii) a smaller number of myoblasts fusing to form myotubes; or (iii) extensive fibre formation after fusion. Differences in fibre number, and hence muscle size, must therefore, presumably be caused by initial differences in the rate of proliferation of myoblasts before fusion.

Locus of illness control: a cross-cultural study

A comparative study of rural Haitian and southern Appalachian health beliefs revealed significant differences both within and between groups regarding perceived control over illness. Data consisted of scores (N = 293) on the Locus of Illness Control Scale, a 15-item forced-choice instrument designed to include two subscales, one focused on illness prevention, the other on cure. Both cultural groups scored more externally on the cure dimension than they did on prevention. Group differences, however, were reversed for the subscales. While Appalachians apparently expect greater success in preventing illness, interestingly, Haitians show greater perceived ability to cure illness. The findings have implications for traditional views of "fatalistic" cultures, for the refinement of concepts related to health locus of control, and for the practical utility of standardized instruments among populations that vary in health problems and therapeutic resources.

Central nervous system active compounds. IX. Cinnolinylisobenzofuranones [1-(3-Phthalidyl)cinnolin-4(1H)-ones]

The synthesis and central nervous system activity of a number of cinnolinylisobenzofuranones are described. The compounds are prepared in moderate yield by the reaction of the sodium salt of a cinnolin-4-one with the appropriate 3-bromophthalide. 1H, 13C n.m.r., and infrared spectral evidence for the structure of the compounds is presented. The compounds cause a loss of muscular control in mice.

A proton magnetic resonance study of ligand exchange on Pentakis(N,N-diethylacetamide)dioxouranium(VI)

Pentakis(N,N-diethylacetamide)dioxouranium(VI) bisperchlorate, [UO2(AcNEt2)5] has been isolated. Proton N.M.R. spectroscopy shows that, in the presence of excess free ligand, [UO2- AcNEt2)5]2+ is the greatly predominant dioxouranium(V1) species in both CD2Cl2 and CD3CN solutions. The rate of ligand exchange is independent of free ligand concentration as shown by the rate law exchange rate = 5k1[UO2(AcNEt2)52+]where in CD2Cl2 solution k1(265 K) = 54.8 � 8.3 s-1, ΔH.‡ = 68.3 � 1.2 kJ mol-1 and ΔS‡ = 47.1 � 4.6 JK-1 mol-1. Somewhat different values for these parameters are obtained in CD3CN solution. These data are compared with similar data for other dioxouranium(VI) systems, and mechanistic comparisons are made.

Central nervous system active compounds. IV. Synthesis of 3-aminobenzylphthalides

Several 3-aminobenzylphthalides have been prepared by reactions of 3- (2-oxo-1-phenylpropyl)-phthalides with hydrazoic acid or by the Beckmann rearrangement. The corresponding reactions with 3-(2- oxoindanyl)phthalides showed limited success but led to a new synthesis of phthalide-isoquinoline alkaloids. Preliminary biological testing of some of these derivatives indicates that they only have weak central nervous system activity.

Hydroboration-Oxidation of Benzocycloalkenes

The products of the hydroboration-oxidation of the benzocycloalkenes (1 ; n = 1-5) with diborane and thexylborane have been studied. With indene, diborane yields 86% of indan-2-ol and thexylborane yields 99%. Each of the other benzocycloalkenes gives approximately 90% of the α-alcohol with diborane, and increasing amounts (10-38%) of the β-alcohol with thexylborane. Electronic factors are suggested to be paramount to explain the difference between indene and the other alkenes. A number of rearrangement reactions have been encountered during the synthesis of the alkenes.

The Reaction of Epoxy Benzocycloalkenes with Diborane

The epoxides formed from the following olefins have been treated with diborane and the products characterized: 1H-indene, 1,2-dihydronaphthalene, 6,7-dihydro-5H-benzocycloheptene, 5,6,7,8-tetra- hydrobenzocyclooctene, 6,7,8,9-tetrahydro-5H-benzocyclononene, 1- and 2-methyl-1H-indene, and 4-and 3-methyl-1,2-dihydronaphthalene. The major product from the unsubstituted epoxides is the β-hydroxy compound, but the proportion of the cehydroxy compound increases with increasing ring size. The methyl-substituted oxirans generally evolve hydrogen on treatment with diborane, and oxidation leads to diol products.

The reaction of some styrene oxides with diborane

Some factors which influence the reaction of styrene oxide and related epoxides with diborane in tetrahydrofuran at 25° have been studied. Styrene oxide (2-phenyloxiran) and o- and p-methyl-styrene oxide afford essentially the 2-arylethanol. (E)-1-Phenylpropene oxide (trans-2-methyl-3-phenyloxiran) yields 76% 1-phenylpropan-2-ol and 24% 1-phenylpropanol. Indene oxide and 1,2-dihydronaphthalene oxide are both cleanly reduced to indan-2-ol and 1,2,3,4-tetrahydronaphthalen-2-ol respectively. Reduction of 2-phenylpropene oxide afforded only 15% 2-phenylpropanol and 85% of an organoborane which gave 2-phenylpropane-1,3-diol on oxidation, and (E)-2-phenylbut-2-ene oxide gave almost exclusively the corresponding 2-phenylbutane-1,3-diol. The stereochemistry of the diol products is discussed, and it is suggested that the relative stability of incipient benzyl and alkyl carbonium ions influences the mode of reaction.

On the reaction of epoxides with diborane

The reaction of some sterically crowded styrene epoxides (phenyloxirans) with diborane has been investigated. (Z)-1-Phenylpropene oxide (cis-2-methyl-3-phenyloxiran) reacts with diborane in tetrahydrofuran at 20° to give, after oxidation, 1-phenylpropan-2-ol(53 %), 1-phenylpropanol (23 %) and 1-phenylpropane-1,3-diol(2%4 ). 2-Methyl-1-phenylpropene oxide (2,2-dimethyl-3-phenyloxiran) under similar conditions affords 2-methyl-1-phenylpropanol (7%) and 2-methyl-1-phenylpropane- 1,3-diol(84%), the major isomer of which was the threo. The epoxide of 2-methyl-3-phenylpropene gives a diol mixture (81%) consisting of the above diols plus 2-benzylpropane-1,3-diol, and 2-methyl- 3-phenylpropanol (3%). The reaction of 1-methyl-2-phenylcyclohexene oxide with diborane gave a complex mixture af products, three of which have been identified. The mechanism of the reaction is discussed with supporting evidence from the use of deuterated diborane.

Nuclear Explosions and Distant Earthquakes: A Search for Correlations

An apparent correlation between nuclear explosions and earthquakes has been reported for the events between September 1961 and September 1966. When data from the events between September 1966 and December 1968 are examined, this correlation disappears. No relationship between the size of the nuclear explosions and the number of distant earthquakes is apparent in the data.