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https://www.readbyqxmd.com/read/28441032/observation-of-intermolecular-hydrogen-bonding-interactions-in-biosynthesized-and-biodegradable-poly-r-3-hydroxybutyrate-co-r-3-hydroxyhexanoate-in-chloroform-and-1-1-1-3-3-3-hexafluoro-2-propanol-hfip
#1
Brian J Sobieski, Isao Noda, John F Rabolt, D Bruce Chase
In this work, we describe polymer-solvent interactions in biosynthesized and biodegradable poly[(R)-3-hydroxybutyrate- co-(R)-3-hydroxyhexanoate] (PHBHx) and the atactic homopolymer, poly(3-hydroxybutyrate) (a-PHB), which were studied both as neat polymers and in solutions of chloroform and 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP). Specifically, infrared frequency shifts of the carbonyl band were observed in semi-crystalline PHBHx, but not in a-PHB, because it cannot form the helical conformation required for crystallization...
January 1, 2017: Applied Spectroscopy
https://www.readbyqxmd.com/read/28441022/a-low-valent-lead-hydride-and-its-extreme-low-field-1h-nmr-chemical-shift
#2
Julia Schneider, Christian Patrick Sindlinger, Klaus Eichele, Hartmut Schubert, Lars Wesemann
Although hydrides of the group 14 elements are well known as versatile starting materials in many chemical transformations, a hydride of lead in oxidation state II is so far unknown. In this work we finally complete the jigsaw puzzle by reporting the isolation of the first low valent organolead hydride. The thermolabile dimeric organolead hydride was synthesized at low temperature and fea-tures a hydride 1H NMR signal (in solution 35.61 ppm; in the solid state 31.1 ppm) at the lowest field observed so far for a diamagnetic compound in agreement with quantum chemical predictions...
April 25, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28441020/general-c-h-arylation-strategy-for-the-synthesis-of-tunable-visible-light-emitting-high-stokes-shift-benzo-a-imidazo-2-1-5-c-d-indolizine-fluorophores
#3
Éric Lévesque, William Schulz Bechara, Léa Constantineau-Forget, Guillaume Pelletier, Natalie M Rachel, Joelle N Pelletier, André B Charette
Herein we report the discovery of the benzo[a]imidazo[2,1,5-c,d]indolizine motif displaying tunable emission covering most of the visible spectrum. The polycyclic core is obtained from readily available amides via a chemoselective process involving Tf2O-mediated amide cyclodehydration followed by intramolecular C-H arylation. Additionally, these fluorescent heterocycles are easily functionalized using electrophilic reagents, enabling divergent access to varied substitution. The effects of said substitution on the compounds' photophysical properties were rationalized by DFT calculations...
April 25, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28440717/serum-carotenoid-interactions-in-premenopausal-women-reveal-%C3%AE-carotene-is-negatively-impacted-by-body-fat
#4
Emily Taylor Nuss, Ashley R Valentine, Zhumin Zhang, HuiChuan Jennifer Lai, Sherry A Tanumihardjo
Increasing body mass indices (BMIs) across the globe reflect pandemic shifts towards habitual positive energy imbalances. Excess body fat in individuals is often associated with high-energy and high-fat diets scanty in fresh produce. Carotenoids are fat-soluble pigments plentiful in many fruits and vegetables. They are well-known for provitamin A and antioxidant functions, but little research has been done related to carotenoid-body mass interactions. Serum carotenoids were analyzed relative to body fat to determine correlations between major serum carotenoids, retinol, BMI, fat mass, and lean mass...
January 1, 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28440543/registered-nurses-perceptions-regarding-nurse-led-antiretroviral-therapy-initiation-in-hhohho-region-swaziland
#5
A H Mavhandu-Mudzusi, P T Sandy, A Hettema
BACKGROUND: Swaziland has the highest HIV prevalence globally. It faces a critical shortage of health workers for addressing the HIV pandemic. To curb this human resource challenge, Swaziland adopted a nurse-driven model for antiretroviral therapy delivery in line with the recommendations of the World Health Organization on task shifting. OBJECTIVE: The study explored the perceptions of registered nurses on the nurse-led antiretroviral therapy initiation programme in the Hhohho region of Swaziland (NARTIS)...
April 25, 2017: International Nursing Review
https://www.readbyqxmd.com/read/28440083/systems-metabolomics-for-prediction-of-metabolic-syndrome
#6
Estelle Pujos-Guillot, Marion Brandolini, Mélanie Pétéra, Dhouha Grissa, Charlotte Joly, Bernard Lyan, Eléonore Herquelot, Sébastien Czernichow, Marie Zins, Marcel Goldberg, Blandine Comte
The evolution of human health is a continuum of transitions, involving multifaceted processes at multiple levels and there is an urgent need for integrative biomarkers that can characterize and predict progression towards disease development. The objective of this work was to perform a systems metabolomics approach to predict metabolic syndrome (MetS) development. A case-control design was used within the French occupational GAZEL cohort (n=112 males: discovery study; n=94: replication/validation study). Our integrative strategy was to combine untargeted metabolomics with clinical, sociodemographic and food habit parameters to describe early phenotypes and build multidimensional predictive models...
April 25, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28439990/explaining-the-declining-rates-of-past-year-cannabis-use-in-australia-a-first-pass
#7
Alison Ritter, Oluwadamisola Sotade
INTRODUCTION AND AIMS: Cannabis use rates in Australia have declined since 2001. No research to date has examined possible reasons, despite evident policy interest in understanding such a positive public health outcome. In a 'first pass' examination, five possible reasons are explored: (i) attitudinal shifts regarding the acceptability of cannabis use; (ii) regulatory or policy changes; (iii) supply/market changes; (iv) changes in other drug use that may operate as substitutes or complements to cannabis; and (v) socio-cultural factors...
April 24, 2017: Drug and Alcohol Review
https://www.readbyqxmd.com/read/28439923/immunosuppressive-drugs-in-whole-blood-validation-of-a-commercially-available-lc-ms-ms-kit-and-comparison-with-immunochemical-assays
#8
Elisa Polledri, Rosa Mercadante, Chiara Ferris Fusarin, Rita Maiavacca, Silvia Fustinoni
RATIONALE: In the determination of immunosuppressive drugs cyclosporine A (CSA), tacrolimus (TARO), sirolimus (SIRO), and everolimus (EVE) in whole blood there is an open debate about which is the best assay between immunochemistry and liquid chromatography-tandem mass spectrometry (LC-MS/MS). This work is aimed to explore this topic, focusing on the use of updated assays and the analysis of a large number of samples. METHOD: A certified in vitro diagnostic kit coupled with a medical device LC-MS/MS was validated and applied to the analysis of 1192 blood samples of patients treated with immunosuppressive drugs...
April 24, 2017: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/28439913/workplace-culture-in-psychiatric-nursing-described-by-nurses
#9
K Kurjenluoma, A Rantanen, B McCormack, P Slater, N Hahtela, T Suominen
AIM: This study looks to describe the workplace culture from the viewpoints of stress, job satisfaction and practice environment. METHODS: Data were collected from nurses (n = 109) using a web-based survey, The Person-Centred Nursing Index, from two purposefully selected hospital districts in Finland. Data were statistically analysed. RESULTS: Nurses described their workplace culture in slightly positive terms. Nurses only occasionally experienced stress (mean = 2...
April 24, 2017: Scandinavian Journal of Caring Sciences
https://www.readbyqxmd.com/read/28439362/use-of-a-90-minute-admission-window-and-front-fill-system-to-reduce-work-compression-on-a-general-medicine-inpatient-teaching-service
#10
Youngjee Choi, Daniel Kim, Hyemi Chong, Christopher Mallow, Jason Bill, Anthony T Fojo, Melvin Blanchard
BACKGROUND: Duty hour limits have shortened intern shifts without concurrent reductions in workload, creating work compression. Multiple admissions during shortened shifts can result in poor training experience and patient care. OBJECTIVE: To relieve work compression, improve resident satisfaction, and improve duty hour compliance in an academic internal medicine program. METHODS: In 2014, interns on general ward services were allotted 90 minutes per admission from 3 pm to 7 pm, when the rate of admissions was high...
April 2017: Journal of Graduate Medical Education
https://www.readbyqxmd.com/read/28438276/integrating-yoga-into-psychotherapy-the-ethics-of-moving-from-the-mind-to-the-mat
#11
Jaclyn M Kamradt
Given the rise in attention to client preferences in medical treatment and the shift in focus toward health promotion, it is not surprising that the use of complementary health approaches have increased in the past several years. Yoga is among the most prominent complementary health approaches. Recently, both qualitative and quantitative work has emerged supporting its use for a variety of medical and psychological disorders. However, there is a critical gap in knowledge regarding how to most optimally and ethically integrate complementary therapies (i...
May 2017: Complementary Therapies in Clinical Practice
https://www.readbyqxmd.com/read/28437955/cyclic-coding-for-brillouin-optical-time-domain-analyzers-using-probe-dithering
#12
Haritz Iribas, Alayn Loayssa, Florian Sauser, Miguel Llera, Sébastien Le Floch
We study the performance limits of mono-color cyclic coding applied to Brillouin optical time-domain analysis (BOTDA) sensors that use probe wave dithering. BOTDA analyzers with dithering of the probe use a dual-probe-sideband setup in which an optical frequency modulation of the probe waves along the fiber is introduced. This avoids non-local effects while keeping the Brillouin threshold at its highest level, thus preventing the spontaneous Brillouin scattering from generating noise in the deployed sensing fiber...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437617/electrostatic-origin-of-red-solvatochromic-shift-of-dfhbdi-in-rna-spinach
#13
Samik Bose, Suman Chakrabarty, Debashree Ghosh
Interactions with environment tune the spectral properties of biological chromophores, e.g. fluorescent proteins. Understanding of the relative contribution of the various types of non-covalent interactions in the spectral shifts can provide rational design principles towards developing new fluorescent probes. In this work, we investigate the origin of the red-shift in the absorption spectra of difluoro hydroxybenzylidene dimethyl imidazolinone (DFHBDI) chromophore in RNA Spinach as compared to the aqueous solution...
April 24, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28437294/sleep-detriments-associated-with-quick-returns-in-rotating-shift-work-a-diary-study
#14
Øystein Vedaa, Erik Mørland, Marit Larsen, Anette Harris, Eilin Erevik, Børge Sivertsen, Bjørn Bjorvatn, Siri Waage, Ståle Pallesen
OBJECTIVE: We aimed to compared sleep characteristics associated with quick returns (QRs, <11 hours between shift intervals) with those associated with other common shift transitions. METHODS: Sixty-seven nurses completed a 2-week work and sleep diary (94.0% female, mean age 47.7 years). A multilevel fixed effects model was used to examine the sleep in QRs compared with two consecutive night shifts, two consecutive evening shifts, and two consecutive day shifts, respectively...
April 21, 2017: Journal of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/28437103/ion-pair-oligomerization-of-chromogenic-triangulenium-cations-with-cyanostar-modified-anions-that-controls-emission-in-hierarchical-materials
#15
Bo Qiao, Brandon E Hirsch, Semin Lee, Maren Pink, Chun-Hsing Chen, Bo W Laursen, Amar H Flood
The hierarchical assembly of colored cationic molecules with receptor-modified counteranions can be used to control optical properties in materials. However, our knowledge of when the optical properties emerge in the hierarchical organization and the variety of cation-anion salts that are available to create these materials is limited. In this work, we extend the salts from small halides to large inorganic anions and determine how the structure coevolves with the emission properties using solution assemblies...
April 24, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28437069/a-new-look-at-the-structural-and-magnetic-properties-of-potassium-neptunate-k2npo4-combining-xrd-xanes-spectroscopy-and-low-temperature-heat-capacity
#16
Anna L Smith, Eric Colineau, Jean-Christophe Griveau, Karin Popa, Guilhem Kauric, Philippe Martin, Andreas C Scheinost, Anthony K Cheetham, Rudy J M Konings
The physicochemical properties of the potassium neptunate K2NpO4 have been investigated in this work using X-ray diffraction, X-ray absorption near edge structure (XANES) spectroscopy at the Np-L3 edge, and low-temperature heat capacity measurements. A Rietveld refinement of the crystal structure is reported for the first time. The Np(VI) valence state has been confirmed by the XANES data, and the absorption edge threshold of the XANES spectrum has been correlated to the Mössbauer isomer shift value reported in the literature...
April 24, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28436751/analysing-workplace-violence-towards-health-care-staff-in-public-hospitals-using-alternative-ordered-response-models-the-case-of-north-eastern-turkey
#17
Ali Kemal Çelik, Erkan Oktay, Kübranur Çebi
The main objective of this paper is to determine key factors that may have a significant effect on the verbal abuse, emotional abuse, and physical assault of health care workers in north-eastern Turkey. A self-administered survey was conducted to 450 health care workers in three well-established hospitals in Erzurum, Turkey. Due to the discrete and ordered nature of the dependent variable of the survey, the data were analysed using four distinctive ordered response models. Results revealed that several key variables were found to be a significant determinant of workplace violence such as the type of the health institution, occupational position, weekly working hours, weekly shift hours, the number of daily patient contacts, age group of the respondents, experience in the health sector, training against workplace violence, and the current policies of the hospitals and the Turkish Ministry of Health...
April 24, 2017: International Journal of Occupational Safety and Ergonomics: JOSE
https://www.readbyqxmd.com/read/28435685/quantification-and-physiological-significance-of-the-rightward-shift-of-the-v-slope-during-incremental-cardiopulmonary-exercise-testing
#18
Hirotaka Nishijima, Kazuo Kondo, Kazuya Yonezawa, Hiroki Hashimoto, Masayuki Sakurai
BACKGROUND: Ventilatory anaerobic threshold (VAT) is frequently used as a measure of exercise tolerance, with the V-slope method being the standard; however, this needs to be visually determined. Over the years, we have observed that the V-slope itself often appears to shift rightward before the appearance of the VAT (RtShift: rightward shift of V-slope). This phenomenon has long been known to occur during the first 1-2 min of steady-state exercise and disappears thereafter; it is attributed to CO2 storage, presumably in active muscle...
2017: BMC Sports Science, Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28435425/power-and-integrated-health-care-shifting-from-governance-to-governmentality
#19
André Janse van Rensburg, Asta Rau, Pieter Fourie, Piet Bracke
Integrated care occurs within micro, meso and macro levels of governance structures, which are shaped by complex power dynamics. Yet theoretically-led notions of power, and scrutiny of its meanings and its functioning, are neglected in the literature on integrated care. We explore an alternative approach. Following a discussion on governance, two streams of theorising power are presented: mainstream and second-stream. Mainstream concepts are based on the notion of power-as-capacity, of one agent having the capacity to influence another-so the overall idea is 'power over?'...
September 14, 2016: International Journal of Integrated Care
https://www.readbyqxmd.com/read/28435102/simultaneous-time-interleaved-multislice-stims-for-rapid-susceptibility-weighted-acquisition
#20
Berkin Bilgic, Huihui Ye, Lawrence L Wald, Kawin Setsompop
T2⁎ weighted 3D Gradient Echo (GRE) acquisition is the main sequence used for Susceptibility Weighted Imaging (SWI) and Quantitative Susceptibility Mapping (QSM). These applications require a long echo time (TE) to build up phase contrast, requiring a long repetition time (TR), and leading to excessively lengthy scans. The long TE acquisition creates a significant amount of unused time within each TR, which can be utilized for either multi-echo sampling or additional image encoding with the echo-shift technique...
April 20, 2017: NeuroImage
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