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https://www.readbyqxmd.com/read/28231007/molecular-dynamics-recrystallization-behavior-and-water-solubility-of-amorphous-anticancer-agent-bicalutamide-and-its-polyvinylpyrrolidone-mixtures
#1
Justyna Szczurek, Marzena Rams-Baron, Justyna Knapik-Kowalczuk, Agata Antosik, Joanna Szafraniec, Witold Jamroz, Mateusz Dulski, Renata Jachowicz, Marian Paluch
In this paper, we investigated the molecular mobility and physical stability of amorphous bicalutamide, a poorly water-soluble drug widely used in prostate cancer treatment. Our broadband dielectric spectroscopy measurements and differential scanning calorimetry studies revealed that amorphous BIC is a moderately fragile material with strong tendency to recrystallize from amorphous state. However, mixing the drug with polymer polyvinylpyrrolidone results in a substantial improvement of physical stability attributed to antiplasticizing effect governing by polymer additive...
February 23, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28228975/the-politics-of-global-public-health-in-fragile-states-and-ungoverned-territories
#2
Frederick M Burkle
The reasons for global health crises and how the world responds to them have dramatically changed over the last half century. Increasingly, natural disasters result in failure of public health and security systems leading to preventable conflict, unconventional war and unprecedented population migration. While scientific expertise exists to mitigate these failures in fragile states and ungoverned territories, inactions are mired by the lack of political will, international legal mandates, and capacity to strategically monitor multidisciplinary public health indicator failures...
January 9, 2017: PLoS Currents
https://www.readbyqxmd.com/read/28228025/variability-in-the-relaxation-behavior-of-glass-impact-of-thermal-history-fluctuations-and-fragility
#3
Qiuju Zheng, John C Mauro
Glasses are nonequilibrium materials that continuously relax toward the metastable supercooled liquid state. As such, the properties of a glass depend on both its composition and thermal history. When an initially cooled glass is subjected to additional thermal cycles, relaxation during the heat treatment is accelerated, leading to changes in the macroscopic properties of the glass. This relaxation behavior is intrinsic to the glassy state and of critical interest to the high-tech glass industry. In many practical cases, the magnitude of the relaxation is less important than the variability of the relaxation effects due to slight variations in the thermal history experienced by the glass...
February 21, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28218616/droplet-lasers-a-review-of-current-progress
#4
David McGloin
It is perhaps surprising that something as fragile as a microscopic droplet could possibly form a laser. In this article we will review some of the underpinning physics as to how this might be possible, and then examine the state of the art in the field. The technology to create and manipulate droplets will be examined, as will the different classes of droplet lasers. We will discuss the rapidly developing field of droplet biolasers and explore how droplet lasers could give rise to new bio and chemical sensing and analysis...
February 20, 2017: Reports on Progress in Physics
https://www.readbyqxmd.com/read/28211681/proton-coupled-electron-transfer-and-the-linear-approximation-for-coupling-to-the-donor-acceptor-distance-fluctuations
#5
Bridget Salna, Abdelkrim Benabbas, Paul M Champion
The often-used "linear approximation" for treating the coupling of donor-acceptor (D-A) distance fluctuations to proton-coupled electron transfer tunneling reactions, is systematically examined. The accuracy of this approximation is found to depend upon the potential energy surfaces that are used to describe both the tunneling particle vibrations and the D-A coordinate probability distribution. A harmonic treatment of both the tunneling particle and the D-A coordinates results in a significant breakdown of the linear approximation when the width of the D-A distribution exceeds ~0...
February 17, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28182980/bowling-alone-dying-together-the-role-of-social-capital-in-mitigating-the-drug-overdose-epidemic-in-the-united-states
#6
Michael J Zoorob, Jason L Salemi
BACKGROUND: Drug overdose deaths have risen precipitously over the last fifteen years. Substantial geographic variation, beyond a simple rural-urban dichotomy, exists in the concentration of overdose deaths, suggesting the existence of as-yet unidentified environmental variables that predict resilience (or vulnerability) to drug overdoses. Motivated by reports highlighting the role of community fragility in the opioid epidemic, we explore whether social capital attenuates overdose death rates...
January 25, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28154015/potential-ways-to-address-shortage-situations-of-mo-99-tc-99m
#7
Leah Filzen, Lacey Ellingson, Andrew Paulsen, Joseph Hung
: Technetium 99m (Tc-99m) is the most common radioisotope used in nuclear medicine, which is produced in a nuclear reactor from the decay of molybdenum-99 (Mo-99). There are only a few aging nuclear reactors around the world that produce Mo-99 and one of the major contributors, the NRU (National Research Universal, Canada), will cease production on October 31, 2016. The NRU produces approximately 40% of the world's Mo-99 supply, so with its impending shut down, shortages of Mo-99/Tc-99m are expected...
February 2, 2017: Journal of Nuclear Medicine Technology
https://www.readbyqxmd.com/read/28150950/force-dependent-folding-and-unfolding-kinetics-in-dna-hairpins-reveals-transition-state-displacements-along-a-single-pathway
#8
Anna Alemany, Felix Ritort
Biomolecules diffusively explore their energy landscape overcoming energy barriers via thermally activated processes to reach the biologically relevant conformation. Mechanically induced unfolding and folding reactions offer an excellent playground to feature these processes at the single-molecule level by monitoring changes in the molecular extension. Here we investigate two-state DNA hairpins designed to have the transition states at different locations. We use optical tweezers to characterize the force-dependent behavior of the kinetic barrier from nonequilibrium pulling experiments by using the continuous effective barrier approach (CEBA)...
February 9, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28146626/ferroelectric-alignment-of-organic-cations-inhibits-nonradiative-electron-hole-recombination-in-hybrid-perovskites-ab-initio-nonadiabatic-molecular-dynamics
#9
Joanna Jankowska, Oleg V Prezhdo
Hybrid organic-inorganic perovskites show impressive potential for photovoltaic applications and currently give rise to one of the most vibrant research areas in the field. Until recently, the electrostatic interactions between their organic and inorganic components were considered mostly for stabilization of the fragile perovskite structure. We study the effect of local interactions of polar C-N bonds in the organic layer on the nonradiative electron-hole recombination in the recently reported room-temperature ferroelectric hybrid perovskite, (benzylammonium)2PbCl4...
February 6, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28142148/role-of-the-common-fragile-sites-in-cancers-with-a-human-papillomavirus-etiology
#10
Ge Gao, David I Smith
High-risk human papillomaviruses (HPVs) are known to be associated with different anogenital cancers including cervical, anal, penile, and vaginal cancers. They are also found to be responsible for the dramatic increases in oropharyngeal squamous cell carcinoma (OPSCC) observed in the United States and Europe. The model for how high-risk HPVs induce cancer formation comes from studies of cervical cancer which usually involves integration of the HPV into the human genome and subsequent changes due to induced chromosomal instability...
February 1, 2017: Cytogenetic and Genome Research
https://www.readbyqxmd.com/read/28130282/rumpel-leede-phenomenon-in-a-patient-with-adult-onset-still-s-disease
#11
Jacob Trygve Lambdin, Catherine Mackenzie
Rumpel-Leede phenomenon (RLP), also known as acute capillary rupture syndrome (ACRS), is a rare occurrence where distal dermal capillaries rupture in response to a proximal compressive force, such as a blood pressure cuff or tourniquet. This phenomenon has been reported to occur in states of vascular fragility such as long-term steroid use, hypertension or diabetes mellitus. Here, we provide a report of RLP occurring secondary to tourniquet application in a 26-year-old woman with adult-onset Still's disease (AOSD) and a recent drug rash...
January 27, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28123120/-drug-selection-and-treatment-goal-in-osteoporosis-therapy
#12
Mika Yamauchi, Toshitsugu Sugimoto
The goal of treatment for osteoporosis is to reduce the risk of fracture. Achieving effective reductions in the risk of fracture requires evidence-based drug selection and careful consideration of patient background, including concomitant diseases and drug adherence. Selective estrogen receptor modulators(SERM)and active vitamin D3 such as eldecalcitol are well indicated in early menopausal women with no history of fragility fractures. Moreover, elderly individuals with a history of fragility fractures are at high risk of vertebral and hip fractures, so bisphosphonates, denosumab and teriparatide are well indicated in these patients...
2017: Clinical Calcium
https://www.readbyqxmd.com/read/28102824/investigation-of-valley-resolved-transmission-through-gate-defined-graphene-carrier-guiders
#13
Shimin Cao, Jiaojiao Zhou, Xuan Wei, Shu-Guang Cheng
Massless charge carriers in gate potential modulate graphene quantum well transport in a same way that electromagnetic wave propagates in optical fibers. Recent experiment by Kim {\it et al} (Nat. Phys. 12 1022) reports the valley symmetry preserved transport in graphene carrier guider. Based on a tight-binding model, the valley resolved transport coefficients are calculated with the method of scattering matrix theory. For a straight potential well, valley resolved conductance is quantized with value $2n+1$ multiply $2e^2/h$ with integer $n$...
January 19, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28089912/hiding-clinical-information-in-medical-images-a-new-high-capacity-and-reversible-data-hiding-technique
#14
Shabir A Parah, Farhana Ahad, Javaid A Sheikh, G M Bhat
A new high capacity and reversible data hiding scheme for e-healthcare applications has been presented in this paper. Pixel to Block (PTB) conversion technique has been used as an effective and computationally efficient alternative to interpolation for the cover image generation to ensure reversibility of medical images. A fragile watermark and Block Checksum (computed for each 4 × 4 block) have been embedded in the cover image for facilitating tamper detection and tamper localization, and hence content authentication at receiver...
January 12, 2017: Journal of Biomedical Informatics
https://www.readbyqxmd.com/read/28077848/the-economy-of-the-totalitarian-mind-the-case-of-the-immigrant-child
#15
Kathleen Kelley-Lainé
Immigration in early childhood can be considered as a traumatic situation. It often goes unrecognized since children adapt to most conditions and conform to their environment with astonishing agility. Inspired by the sensitive work of Sándor Ferenczi, and Donald Winnicott, regarding the psychic economy of maturational processes, the author explores the concept of totalitarian functioning and its obstruction of the growing psyche. Before birth we are all totalitarian, one with the mother; this symbiotic, invincible state of survival mode is prolonged as the immature newborn child ignores the requirements of reality and enjoys omnipotent pleasure through hallucination...
December 2016: American Journal of Psychoanalysis
https://www.readbyqxmd.com/read/28062692/urban-sustainability-in-an-age-of-enduring-inequalities-advancing-theory-and-ecometrics-for-the-21st-century-city
#16
Robert J Sampson
The environmental fragility of cities under advanced urbanization has motivated extensive efforts to promote the sustainability of urban ecosystems and physical infrastructures. Less attention has been devoted to neighborhood inequalities and fissures in the civic infrastructure that potentially challenge social sustainability and the capacity of cities to collectively address environmental challenges. This article draws on a program of research in three American cities-Boston, Chicago, and Los Angeles-to develop hypotheses and methodological strategies for assessing how the multidimensional and multilevel inequalities that characterize contemporary cities bear on sustainability...
January 6, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28049653/mechanisms-in-endocrinology-diabetes-mellitus-a-state-of-low-bone-turnover-a-systematic-review-and-meta-analysis
#17
REVIEW
Katrine Hygum, Jakob Starup-Linde, Torben Harsløf, Peter Vestergaard, Bente L Langdahl
OBJECTIVE: To investigate the differences in bone turnover between diabetic patients and controls. DESIGN: A systematic review and meta-analysis. METHODS: A literature search was conducted using the databases Medline at PubMed and EMBASE. The free text search terms 'diabetes mellitus' and 'bone turnover', 'sclerostin', 'RANKL', 'osteoprotegerin', 'tartrate-resistant acid' and 'TRAP' were used. Studies were eligible if they investigated bone turnover markers in patients with diabetes compared with controls...
March 2017: European Journal of Endocrinology
https://www.readbyqxmd.com/read/28049443/performance-of-edmonton-frail-scale-on-frailty-assessment-its-association-with-multi-dimensional-geriatric-conditions-assessed-with-specific-screening-tools
#18
Simone Perna, Matthew D'Arcy Francis, Chiara Bologna, Francesca Moncaglieri, Antonella Riva, Paolo Morazzoni, Pietro Allegrini, Antonio Isu, Beatrice Vigo, Fabio Guerriero, Mariangela Rondanelli
BACKGROUND: The aim of this study was to evaluate the performance of Edmonton Frail Scale (EFS) on frailty assessment in association with multi-dimensional conditions assessed with specific screening tools and to explore the prevalence of frailty by gender. METHODS: We enrolled 366 hospitalised patients (women\men: 251\115), mean age 81.5 years. The EFS was given to the patients to evaluate their frailty. Then we collected data concerning cognitive status through Mini-Mental State Examination (MMSE), health status (evaluated with the number of diseases), functional independence (Barthel Index and Activities Daily Living; BI, ADL, IADL), use of drugs (counting of drugs taken every day), Mini Nutritional Assessment (MNA), Geriatric Depression Scale (GDS), Skeletal Muscle Index of sarcopenia (SMI), osteoporosis and functionality (Handgrip strength)...
January 4, 2017: BMC Geriatrics
https://www.readbyqxmd.com/read/28048283/we-h-204-03-part-2-history-and-archives-resources-at-aip-for-aapm-and-its-members
#19
M Mueller
: "William D. Coolidge, Inventor of the Modern X-ray Tube" David J. Allard, M.S., CHP - Director, PA DEP Bureau of Radiation Protection William David Coolidge 1873-1975 was a research scientist and inventor of the modern X-ray tube. Besides Roentgen, with his 1895 discovery and subsequent studies of X-rays, perhaps no other individual contributed more to the advancement of X-ray technology than did Coolidge. He was born in Hudson, MA and received his Bachelor of Science degree from MIT in 1896...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047523/we-h-204-00-history-committee-symposium
#20
Michael Gossman
: "William D. Coolidge, Inventor of the Modern X-ray Tube" David J. Allard, M.S., CHP - Director, PA DEP Bureau of Radiation Protection William David Coolidge 1873-1975 was a research scientist and inventor of the modern X-ray tube. Besides Roentgen, with his 1895 discovery and subsequent studies of X-rays, perhaps no other individual contributed more to the advancement of X-ray technology than did Coolidge. He was born in Hudson, MA and received his Bachelor of Science degree from MIT in 1896...
June 2016: Medical Physics
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