Environmental philosophy: rivalry within

Environmental philosophy contains fractious elements, two of these being social ecology and deep ecology. This study highlights and elaborates upon the fact that social ecology and deep ecology actually have more in common than their respective proponents care to acknowledge, and identifies a major barrier between them which has been with environmental philosophy since its inception some 30 years ago and still persists to this day, namely the biocentric-anthropocentric divide

Review of \u3ci\u3eThe Nez Perces in the Indian Territory: Nimiipuu Survival.\u3c/i\u3e By J. Diane Pearson

The Nimiipuu are most associated with the Columbia Basin rather than the Great Plains. Yet some Nimiipuu groups and their western allies lived for a year or more in the Northern Plains during the early to mid-1800s. There they followed a bison-hunting life and linked the region to the Columbia River trading network. Nimiipuu were so much a part of the region that they were signatories to the United States\u27 1855 Treaty with the Blackfeet negotiated by Isaac I. Stevens. Nimiipuu knowledge of the northern Great Plains decided the escape route from their homelands that was the Nez Perce War of 1877, which is how readers will recognize them. Less well known are Chief Joseph\u27s and other leaders\u27 efforts to return to their homeland. Few people today know the story of the Nimiipuu\u27s 1877-85 sojourn through Hell-Eeikish Pah-in the Indian Territory and their return to the Northwest. Their deeply traumatic experience is little known even among today\u27s generation of Nimiipuu

Systematic Control of Aged Skeletal Muscle Following High-Intensity Stretch-Shortening Contraction Exercise Training: Epigenomic Regulation and Signaling Factors Underpinning Adaptation

Sarcopenia, the age-related decline in skeletal muscle mass, results in a loss of strength and functional capacity, which subsequently increases the risk of disease, disability, frailty, and all-cause mortality. Exercise is known to be an efficacious paradigm for improving health and attenuating or preventing many chronic diseases. For the previous two decades, our laboratory has established an in vivo rodent dynamometer model to explore the effects of various skeletal muscle training paradigms following stretch-shortening contractions (SSCs).The responses tohigh-intensity resistance-type exercise training (RTET) using this physiological model ranges from adaptation, characterized by enhanced skeletal muscle performance along with increased muscle mass, to maladaptation, defined as an absence or diminishment of skeletal muscle performance and no improvements in muscle mass. Utilizing a non-injurious SSC protocol, training-induced adaptation occurs in young rodents; this response is altered with age in which old rodents undergo maladaptation when exposed to this same chronic loading protocol. Additionally, with respect to chronologically advancing age, our previous work indicates an altered adaptive phenotype following SSC RTET occurs prior to complete biological development of the rodent – six months of age in the adult rat, which we believe may indicate the onset of a loss in homeostatic control leading to an age-specific biological departure from the adaptive response. However, recently we have shown that modifying the frequency of RTET from three to two days per week in older rodents (e.g. 30-31 months of age) attenuates age-dependent maladaptation and restores muscle quality to a younger phenotype. Despite the therapeutic potential of RTET, a fundamental basis for evidence-based exercise prescription is still largely undetermined because the molecular, cellular and integrated physiological pathways involved in exercise-induced muscle adaptation are not fully understood. Aging in-and-of-itself is a biological process associated with an altered phenotype, and emerging evidence suggests these changes are possibly linked to epigenomic processes. Excitingly, recent research has shown that exercise can influence changes in DNA methylation in skeletal muscle. However, it is currently unknown how exactly DNA methylation may be influencing the adaptation of skeletal muscle to high-intensity SSC RTET, which could be an important mechanism underlying the responsivity of the muscle to training in the context of aging. Traditionally, the term muscle memory has been defined as describing the capability of skeletal muscle to respond more quickly to an applied stimulus that has been encountered previously in spite of periods of inactivity. Recently, emerging evidence has pointed to the existence of a cellular foundation of skeletal muscle memory. Because environmental stimuli and stressors lead to modifications in gene expression, epigenetics/epigenomics are highly likely to form the underlying basis for this cellular memory. However, despite this collective knowledge, to date no studies have determined whether or not changes via DNA methylation that occur as a result of exposure to an adaptive exercise stimulus has a lasting influence on the adaptability of skeletal muscle upon reintroduction to the same stimulus at a later life. In order to examine these unresolved issues, the purpose of this dissertation followed three specific aims: 1) To determine the effects of aging and a reduced training frequency on the activation of molecular signaling pathways associated with the adaptation of skeletal muscle following one month of high-intensity SSC RTET in old rats; 2) to investigate whether DNA methylation influences the molecular signaling activity and adaptability of skeletal muscle following one month of high-intensity SSC RTET, and whether reducing the training frequency modifies the methylation profile of skeletal muscle in response to the training stimulus; 3) to examine if introducing high-intensity SSC RTET at an earlier relative age promotes changes in molecular signaling and DNA methylation that positively influences the ability of skeletal muscle to adapt upon re-exposure to the same paradigm at a later agepreviously shown to have the inability to go through the full adaptive response . The hypotheses for this research were that the ability of aged muscle to adapt to high-intensity SSC RTET would be compromised when exposed to an inappropriate stimulus (i.e., maladaptive) as a consequence of a dysregulated molecular signaling response which would be observable in distinct pathways crucial in muscle homeostasis and remodeling; furthermore, these potential age-related dysregulated events in gene activity would occur as a consequence to altered DNA methylation. Moreover, older animals exposed to a reduced frequency of high-intensity SSC RTET would respond favorably to the training stimulus and in an appropriate manner (i.e., adaptation) and would have a resemblance more like young rats in terms of the molecular signaling pathway and DNA methylation responses compared to age-matched counterparts exposed to a higher frequency that induces maladaptation. Additionally, training rodents at a younger relative age compared to where age-dependent maladaptation occurs would attenuate DNA methylation and therefore positively augment the adaptability of muscle to respond favorably to chronic SSC RTET at a later age following detraining. The results from this study could be vital in understanding the underlying performance, physiological, molecular, and environmental factors influencing the capability of aged skeletal muscle to undergo adaptation in response to RTET; and, thus have important ramifications in the attenuation and/or reversal of sarcopenia. Additionally, we sought to determine the therapeutic efficacy of a training-retraining paradigm using our in vivo high-intensity RTET paradigm by investigating whether or not training at an earlier age is able to prevent functional and physiological decrements of skeletal muscle during the later stages of life

Stacked-ring electrostatic ion guide

In 1969 Bahr, Gerlich, and Teloy introduced an rf device that consisted of a stack of ring electrodes, with charge sign alternation between neighboring rings, to store or transport ions. Here we propose to operate such a device with electrostatic potentials rather than rf potentials: ions that move axially along the center of the guide are thereby subjected to an oscillating electrical potential similar to the sinusoidal rf potential in familiar rf-only multipole ion guides. The oscillating potential of the stacked-ring static ion guide focuses ions by exerting a field gradient force on the ions so as to push ions toward the central axis where the field is weakest. The stacked-ring ion guide produces an effectively static “pseudopotential” that is much steeper at the edge (potential varies as er) compared to a quadrupole or octupole guide (for which the potential varies as r2 or r6, where r is radial position) and that is much flatter near the center of the guide (for potentially higher ion flux). Advantages of the new ion guide include static rather than rf potential, low electrical noise, a large field-free region near the central axis of the guide, and simple mechanical construction. A disadvantage of the stacked-ring ion guide is that high ion axial kinetic energy is required; ions with axial kinetic energy that is too low may be trapped in the shallow pseudopotential well between adjacent ring electrodes

Does having highly educated adult children reduce mortality risks for parents with low educational attainment in Europe?

This work was supported by the ESRC Centre for Population Change (grant number ES/K007394/1); and the University of St Andrews.It is known that the education of significant others may affect an individual’s mortality. This paper extends an emerging body of research by investigating the effect of having highly educated adult children on the longevity of older parents in Europe, especially parents with low educational attainment. Using a sample of 15,015 individuals (6,620 fathers and 8,395 mothers) aged 50 and above, with 1,847 recorded deaths, over a mean follow-up period of 10.9 years from the Survey of Health, Ageing and Retirement in Europe (SHARE), we examine whether the well-established socioeconomic gradient in mortality among parents is modified when their adult children have higher educational attainment than their parents. We find that having highly educated adult children is associated with reduced mortality risks for fathers and mothers with low educational attainment, compared to their counterparts whose adult children have only compulsory education. The association is stronger in early older age (ages 50 to 74) than in later older age (ages 75 and over). Part of the association appears to be explained by health behaviours (physical (in)activity) and health status (self-rated health). Our findings suggest that the socioeconomic-mortality gradient among older parents might be better captured using an intergenerational approach that recognises the advantage of having highly educated adult children, especially for fathers and mothers with only compulsory education.Publisher PDFPeer reviewe

Property Rights and the Duty to Extend Human Life

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