60 research outputs found
Alchemical Transformation: Consciousness and matter, form and information
There has grown up, relatively recently, a nucleus of interests called ìconsciousness studiesî in which physicists and mathematicians, as well as neuroscientists and psychologists, attempt to discover the origins of ìconsciousnessî within the brain. A variety of approaches are employed, some based upon neural networks, others that argue that consciousness must have a quantum mechanical basis, or involve self-organization arising out of non-linearity. A common thread is a certain sense of optimism that ìthe question of consciousnessî will yield its secrets in the same way as, for example, the genetic code or sub-atomic matter. I must confess that I find none of the approaches or arguments particularly convincing. It could be soî, I find myself thinking, but it could equally be otherwise.î My greatest concern is that old habits of thinking and ways of seeing, which could, in part, be termed mechanistic or reductionist abound in this new field, a field, I believe, that is radically different from anything science has hitherto explored. There are deep philosophical problems still to be debated, issues involving questions of identity, the role of the observer, the movement from object to process, the role of the subtle and the transformation of matter by what may lie beyond. We must move cautiously. The issue is informed from several different sources. There is the subjective, which can be perfectly rational and, in a cer tain sense, scientific. The subjective includes knowledge and approaches from the personal, the psychotherapeutic and various meditative and mystical traditions. Then there is our increasing scientific knowledge of the brain\u27s structure and chemistry, as well as the similarity of certain neurotransmitters to molecules employed by the immune system, which, distributed throughout the body, may well be as complex and equally subtle as the brain itself. Speculations about consciousness, non-locality, subtle levels of matter and active information also come from theoretical physics. Such an influx of creativity, from the theoretical sciences, is to be welcomed yet there is a danger of a certain naivetÈ capable of glossing over much deeper issues. To this list of sources I would add the philosophical tradition, of West and East, instruments of investigation that are sometimes ignored by scientists working in the field. Anyone speaking about consciousness , for example, should be cautioned by Wittgenstein\u27s writings on language games. Indeed, language is one of the key issues in our whole venture. Having had the privilege of discussions with Native American elders who speak the Algonquin family of languagesóall strongly verb-basedóI realize how deeply conditioned is our thinking by noun-based Indo- European languages. Our acts of speech incline us to perceive a world of objects and of concepts. The creation of the concept, placing a boundary around thoughts, ordering them into classes, and classes of classes, seems inevitable to us and the very basis of our logical thought. It is therefore salutary to realize that an equally rational and deeply philosophical people do not involve themselves with the creation of concepts but base their thinking on process, transformation and flux. Were a Blackfoot to write an essay on the subject of ìconsciousness (of course this concept itself would never arise) many of the problems that currently face us-would never arise; a different set of difficulties could, to us, be particularly illuminating. in particular, since group consciousness, shared dreams, constant transformation, and participation in a world of ìenergies or ìspirits,î seems perfectly natural, Blackfoot philosophers may be less interested in ìcollective mindî that in speculating as how such a thing as an individual consciousness and a fixed ego could ever emerge out of such a flux. In engaging in these investigations we should keep Niels Bohrís maxim before us, ìWe are suspended in language in such a way that we cannot say what is up and what is down. We must never forget that ìrealityî too is a human word just like ìwave\u27 or ìconsciousnessî. Our task is to learn to use these words correctly.
TOWARDS A PROCESS THEORY OF HEALING: ENERGY, ACTIVITY AND GLOBAL FORM
The paper begins with a discussion of the ideas of subtle energy and its circulation that appear common to many different healing cultures. These ideas are compared to and contrasted with notions of energy from within Western physics and it is suggested that some more subtle views, or paradigms, of energy are required within Western science. In particular, the implications of a process and verb-based world view are briefly explored, together with the possibility of a process-based mathematics. Within such a descriptive system notions of energy-process would be remarkably different. The paper then explores the extent to which such notions may be present, or have the potential for development within modern physics. These include such approaches as giving subtle forms to available energy, the activities of information and global correlations within systems and the notions of coherence whereby subtle correlations can produce powerful effects. In particular, the idea of non-logical and global correlation is discussed in the context of quantum theory and 50called Chaos Theory. Ideas of Gentle Action are also introduced and it is suggested how, through a field of global meaning (or nonlocal correlations), an active form of energy may circulate through the body and act to renew its functioning and bring the various organs into active balance. In this view, the various healing arts are designed to renew and foster the harmonious functioning of mind and body. Finally, in all appendix to this paper, a more technical account is presented of the sortS of Ilonlocal correlations that exist at the quantum level
Radical-induced hetero-nuclear mixing and low-field C relaxation in solid pyruvic acid
Radicals serve as a source of polarization in dynamic nuclear polarization, but may also act as polarization sink, in particular at low field. Additionally, if the couplings between the electron spins and different nuclear reservoirs are stronger than any of the reservoirs’ couplings to the lattice, radicals can mediate hetero-nuclear polarization transfer. Here, we report radical-enhanced C relaxation in pyruvic acid doped with trityl. Up to 40 K, we find a linear carbon field dependence between 5 mT and 2 T. We model the dependence quantitatively, and find that the presence of trityl accelerates direct hetero-nuclear polarization transfer at low fields, while at higher fields C relaxation is diffusion limited. Measurements of hetero-nuclear polarization transfer up to 600 mT confirm the predicted radical-mediated proton–carbon mixing
The discovery of potent, selective, and reversible inhibitors of the house dust mite peptidase allergen Der p 1: an innovative approach to the treatment of allergic asthma.
Blocking the bioactivity of allergens is conceptually attractive as a small-molecule therapy for allergic diseases but has not been attempted previously. Group 1 allergens of house dust mites (HDM) are meaningful targets in this quest because they are globally prevalent and clinically important triggers of allergic asthma. Group 1 HDM allergens are cysteine peptidases whose proteolytic activity triggers essential steps in the allergy cascade. Using the HDM allergen Der p 1 as an archetype for structure-based drug discovery, we have identified a series of novel, reversible inhibitors. Potency and selectivity were manipulated by optimizing drug interactions with enzyme binding pockets, while variation of terminal groups conferred the physicochemical and pharmacokinetic attributes required for inhaled delivery. Studies in animals challenged with the gamut of HDM allergens showed an attenuation of allergic responses by targeting just a single component, namely, Der p 1. Our findings suggest that these inhibitors may be used as novel therapies for allergic asthma
Radical-Induced Low-Field 1H Relaxation in Solid Pyruvic Acid Doped with Trityl-OX063
In dynamic nuclear polarization (DNP), radicals such as trityl provide a source for high nuclear spin polarization. Conversely, during the low-field transfer of hyperpolarized solids, the radicals’ dipolar or Non-Zeeman reservoir may act as a powerful nuclear polarization sink. Here, we report the low-temperature proton spin relaxation in pyruvic acid doped with trityl, for fields from 5 mT to 2 T. We estimate the heat capacity of the radical Non-Zeeman reservoir experimentally and show that a recent formalism by Wenckebach yields a parameter-free, yet quantitative model for the entire field range
Exercise therapy, manual therapy, or both, for osteoarthritis of the hip or knee: a factorial randomised controlled trial protocol
<p>Abstract</p> <p>Background</p> <p>Non-pharmacological, non-surgical interventions are recommended as the first line of treatment for osteoarthritis (OA) of the hip and knee. There is evidence that exercise therapy is effective for reducing pain and improving function in patients with knee OA, some evidence that exercise therapy is effective for hip OA, and early indications that manual therapy may be efficacious for hip and knee OA. There is little evidence as to which approach is more effective, if benefits endure, or if providing these therapies is cost-effective for the management of this disorder. The MOA Trial (Management of OsteoArthritis) aims to test the effectiveness of two physiotherapy interventions for improving disability and pain in adults with hip or knee OA in New Zealand. Specifically, our primary objectives are to investigate whether:</p> <p>1. Exercise therapy versus no exercise therapy improves disability at 12 months;</p> <p>2. Manual physiotherapy versus no manual therapy improves disability at 12 months;</p> <p>3. Providing physiotherapy programmes in addition to usual care is more cost-effective than usual care alone in the management of osteoarthritis at 24 months.</p> <p>Methods</p> <p>This is a 2 × 2 factorial randomised controlled trial. We plan to recruit 224 participants with hip or knee OA. Eligible participants will be randomly allocated to receive either: (a) a supervised multi-modal exercise therapy programme; (b) an individualised manual therapy programme; (c) both exercise therapy and manual therapy; or, (d) no trial physiotherapy. All participants will continue to receive usual medical care. The outcome assessors, orthopaedic surgeons, general medical practitioners, and statistician will be blind to group allocation until the statistical analysis is completed. The trial is funded by Health Research Council of New Zealand Project Grants (Project numbers 07/199, 07/200).</p> <p>Discussion</p> <p>The MOA Trial will be the first to investigate the effectiveness and cost-effectiveness of providing physiotherapy programmes of this kind, for the management of pain and disability in adults with hip or knee OA.</p> <p>Trial registration</p> <p>Australian New Zealand Clinical Trials Registry ref: ACTRN12608000130369.</p
Association between ultrasound-detected synovitis and knee pain: a population-based case-control study with both cross-sectional and follow-up data
Background: Recently an important role for synovial pathology in the initiation and progression of knee osteoarthritis (OA) has been emphasised. This study aimed to examine whether ultrasonographydetected synovial changes (USSCs) associate with knee pain (KP) in a community population.
Methods: A case-control study was conducted to compare people with early KP (n=298), established KP (n=100) or no KP (n=94) at baseline. Multinomial logistic regression was used to estimate odds ratio (OR) and 95% confidence interval (CI) between groups adjusted for radiographic osteoarthritis (ROA) severity and other confounding factors. After one year 255 participants with early and established KP completed the followup questionnaire for changes in KP. Logistic regression with adjustment was used to determine predictors of KP worsening.
Results: At baseline, effusion was associated with early (OR 2.64, 95%CI 1.57 to 4.45) and established KP (OR 5.07, 95%CI 2.74 to 9.38). Synovial hypertrophy was also associated with early (OR 5.43, 95%CI 2.12 to 13.92) and established KP (OR 13.27, 95%CI 4.97 to 35.43). The association with effusion diminished when adjusted for ROA. Power Doppler signal was uncommon (early KP 3%, established KP 2%, controls 0%). Baseline effusion predicted worsening of knee pain at one year (OR 1.95, 95% CI 1.05 to 3.64). However, after adjusting for ROA, the prediction was insignificant (aORs 0.95, 95%CI 0.44 to 2.02).
Conclusion: US effusion and synovial hypertrophy are associated with KP, but only effusion predicts KP worsening. However, the association/prediction are not independent from ROA. Power Doppler signal is uncommon in people with KP. Further study is needed to understand whether synovitis is directly involved in different types of KP
Structure of S. aureus HPPK and the Discovery of a New Substrate Site Inhibitor
The first structural and biophysical data on the folate biosynthesis pathway enzyme and drug target, 6-hydroxymethyl-7,8-dihydropterin pyrophosphokinase (SaHPPK), from the pathogen Staphylococcus aureus is presented. HPPK is the second essential enzyme in the pathway catalysing the pyrophosphoryl transfer from cofactor (ATP) to the substrate (6-hydroxymethyl-7,8-dihydropterin, HMDP). In-silico screening identified 8-mercaptoguanine which was shown to bind with an equilibrium dissociation constant, Kd, of ∼13 µM as measured by isothermal titration calorimetry (ITC) and surface plasmon resonance (SPR). An IC50 of ∼41 µM was determined by means of a luminescent kinase assay. In contrast to the biological substrate, the inhibitor has no requirement for magnesium or the ATP cofactor for competitive binding to the substrate site. The 1.65 Å resolution crystal structure of the inhibited complex showed that it binds in the pterin site and shares many of the key intermolecular interactions of the substrate. Chemical shift and 15N heteronuclear NMR measurements reveal that the fast motion of the pterin-binding loop (L2) is partially dampened in the SaHPPK/HMDP/α,β-methylene adenosine 5′-triphosphate (AMPCPP) ternary complex, but the ATP loop (L3) remains mobile on the µs-ms timescale. In contrast, for the SaHPPK/8-mercaptoguanine/AMPCPP ternary complex, the loop L2 becomes rigid on the fast timescale and the L3 loop also becomes more ordered – an observation that correlates with the large entropic penalty associated with inhibitor binding as revealed by ITC. NMR data, including 15N-1H residual dipolar coupling measurements, indicate that the sulfur atom in the inhibitor is important for stabilizing and restricting important motions of the L2 and L3 catalytic loops in the inhibited ternary complex. This work describes a comprehensive analysis of a new HPPK inhibitor, and may provide a foundation for the development of novel antimicrobials targeting the folate biosynthetic pathway
The impact of transposable element activity on therapeutically relevant human stem cells
Human stem cells harbor significant potential for basic and clinical translational research as well as regenerative
medicine. Currently ~ 3000 adult and ~ 30 pluripotent stem cell-based, interventional clinical trials are ongoing
worldwide, and numbers are increasing continuously. Although stem cells are promising cell sources to treat a
wide range of human diseases, there are also concerns regarding potential risks associated with their clinical use,
including genomic instability and tumorigenesis concerns. Thus, a deeper understanding of the factors and
molecular mechanisms contributing to stem cell genome stability are a prerequisite to harnessing their therapeutic
potential for degenerative diseases. Chemical and physical factors are known to influence the stability of stem cell
genomes, together with random mutations and Copy Number Variants (CNVs) that accumulated in cultured human
stem cells. Here we review the activity of endogenous transposable elements (TEs) in human multipotent and
pluripotent stem cells, and the consequences of their mobility for genomic integrity and host gene expression. We
describe transcriptional and post-transcriptional mechanisms antagonizing the spread of TEs in the human genome,
and highlight those that are more prevalent in multipotent and pluripotent stem cells. Notably, TEs do not only
represent a source of mutations/CNVs in genomes, but are also often harnessed as tools to engineer the stem cell
genome; thus, we also describe and discuss the most widely applied transposon-based tools and highlight the
most relevant areas of their biomedical applications in stem cells. Taken together, this review will contribute to the
assessment of the risk that endogenous TE activity and the application of genetically engineered TEs constitute for
the biosafety of stem cells to be used for substitutive and regenerative cell therapiesS.R.H. and P.T.R. are funded by the Government of Spain (MINECO, RYC-2016-
21395 and SAF2015–71589-P [S.R.H.]; PEJ-2014-A-31985 and SAF2015–71589-
P [P.T.R.]). GGS is supported by a grant from the Ministry of Health of the
Federal Republic of Germany (FKZ2518FSB403)
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Towards advancing scientific knowledge of climate change impacts on short-duration rainfall extremes
A large number of recent studies have aimed at understanding short-duration rainfall extremes, due to their impacts on flash floods, landslides and debris flows and potential for these to worsen with global warming. This has been led in a concerted international effort by the INTENSE Crosscutting Project of the GEWEX (Global Energy and Water Exchanges) Hydroclimatology Panel. Here, we summarize the main findings so far and suggest future directions for research, including: the benefits of convection-permitting climate modelling; towards understanding mechanisms of change; the usefulness of temperature-scaling relations; towards detecting and attributing extreme rainfall change; and the need for international coordination and collaboration. Evidence suggests that the intensity of long-duration (1 day+) heavy precipitation increases with climate warming close to the Clausius–Clapeyron (CC) rate (6–7% K−1), although large-scale circulation changes affect this response regionally. However, rare events can scale at higher rates, and localized heavy short-duration (hourly and sub-hourly) intensities can respond more strongly (e.g. 2 × CC instead of CC). Day-to-day scaling of short-duration intensities supports a higher scaling, with mechanisms proposed for this related to local-scale dynamics of convective storms, but its relevance to climate change is not clear. Uncertainty in changes to precipitation extremes remains and is influenced by many factors, including large-scale circulation, convective storm dynamics andstratification. Despite this, recent research has increased confidence in both the detectability and understanding of changes in various aspects of intense short-duration rainfall. To make further progress, the international coordination of datasets, model experiments and evaluations will be required, with consistent and standardized comparison methods and metrics, and recommendations are made for these frameworks
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