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https://www.readbyqxmd.com/read/28231623/compassion-fatigue-in-nurses-a-metasynthesis
#1
Anna G W Nolte, Charlene Downing, Annie Temane, Marie Hastings-Tolsma
AIM: The purpose of this research was to interpret the body of qualitative work focusing on compassion fatigue to distill a common understanding that could then be applied to nursing care. BACKGROUND: Complex demands place extraordinary stress on nurses struggling to work in overburdened healthcare systems. The result can be the inability to care well for others, leading to compassion fatigue, burnout, and increased numbers leaving the profession. Meta-synthesis offers a means of more fully illuminating compassion fatigue and further understanding of practices which might reduce its negative consequences...
February 23, 2017: Journal of Clinical Nursing
https://www.readbyqxmd.com/read/28231556/compliant-support-surfaces-affect-sensory-reweighting-during-balance-control
#2
I M Schut, D Engelhart, J H Pasma, R G K M Aarts, A C Schouten
To maintain upright posture and prevent falling, balance control involves the complex interaction between nervous, muscular and sensory systems, such as sensory reweighting. When balance is impaired, compliant foam mats are used in training methods to improve balance control. However, the effect of the compliance of these foam mats on sensory reweighting remains unclear. In this study, eleven healthy subjects maintained standing balance with their eyes open while continuous support surface (SS) rotations disturbed the proprioception of the ankles...
February 9, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28231551/acute-effect-of-ozone-exposure-on-daily-mortality-in-seven-cities-of-jiangsu-province-china-no-clear-evidence-for-threshold
#3
Kai Chen, Lian Zhou, Xiaodong Chen, Jun Bi, Patrick L Kinney
BACKGROUND: Few multicity studies have addressed the health effects of ozone in China due to the scarcity of ozone monitoring data. A critical scientific and policy-relevant question is whether a threshold exists in the ozone-mortality relationship. METHODS: Using a generalized additive model and a univariate random-effects meta-analysis, this research evaluated the relationship between short-term ozone exposure and daily total mortality in seven cities of Jiangsu Province, China during 2013-2014...
February 20, 2017: Environmental Research
https://www.readbyqxmd.com/read/28231432/dismantling-the-red-wall-of-colloidal-perovskites-highly-luminescent-formamidinium-and-formamidinium-cesium-lead-iodide-nanocrystals
#4
Loredana Protesescu, Sergii Yakunin, Sudhir Kumar, Janine Bär, Federica Bertolotti, Norberto Masciocchi, Antonietta Guagliardi, Matthias Grotevent, Ivan Shorubalko, Maryna I Bodnarchuk, Chih-Jen Shih, Maksym V Kovalenko
Colloidal nanocrystals (NCs) of APbX3-type lead halide perovskites [A=Cs+, CH3NH3+ (methylammonium or MA+) or CH(NH2)2+ (formamidinium or FA+); X=Cl-, Br-, I-] have recently emerged as highly versatile photonic sources for applications ranging from simple photoluminescence down-conversion (e.g., for display backlighting) to light emitting diodes. From the perspective of spectral coverage, a formidable challenge facing the use of these materials is how to obtain stable emissions in the red and infrared spectral regions covered by the iodide-based compositions...
February 23, 2017: ACS Nano
https://www.readbyqxmd.com/read/28231404/express-or-repress-the-transcriptional-dilemma-of-damaged-chromatin
#5
Ilaria Capozzo, Fabio Iannelli, Sofia Francia, Fabrizio d'Adda di Fagagna
The fine modulation of transcriptional activity around DNA lesions is essential to carefully regulate the crosstalk between transcription, the DNA damage response, and DNA repair, particularly when the lesion occurs next to, or within, actively transcribed genes. Recently, several studies have been carried out to investigate how DNA lesions have an impact on local transcription, but the emerging model remains incomplete. Transcription of genes around damaged DNA is actively down-regulated by the DNA damage response through different mechanisms, which appear specific to the chromatin context, the type of DNA damage or its complexity...
February 23, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28231331/mesenchymal-stromal-cells-mscs-induce-ex-vivo-proliferation-and-erythroid-commitment-of-cord-blood-haematopoietic-stem-cells-cb-cd34-cells
#6
Simone Perucca, Andrea Di Palma, Pier Paolo Piccaluga, Claudia Gemelli, Elisa Zoratti, Giulio Bassi, Edoardo Giacopuzzi, Andrea Lojacono, Giuseppe Borsani, Enrico Tagliafico, Maria Teresa Scupoli, Simona Bernardi, Camilla Zanaglio, Federica Cattina, Valeria Cancelli, Michele Malagola, Mauro Krampera, Mirella Marini, Camillo Almici, Sergio Ferrari, Domenico Russo
A human bone marrow-derived mesenchymal stromal cell (MSCs) and cord blood-derived CD34+ stem cell co-culture system was set up in order to evaluate the proliferative and differentiative effects induced by MSCs on CD34+ stem cells, and the reciprocal influences on gene expression profiles. After 10 days of co-culture, non-adherent (SN-fraction) and adherent (AD-fraction) CD34+ stem cells were collected and analysed separately. In the presence of MSCs, a significant increase in CD34+ cell number was observed (fold increase = 14...
2017: PloS One
https://www.readbyqxmd.com/read/28231329/changes-in-field-workability-and-drought-risk-from-projected-climate-change-drive-spatially-variable-risks-in-illinois-cropping-systems
#7
Bradley J Tomasek, Martin M Williams, Adam S Davis
As weather patterns become more volatile and extreme, risks introduced by weather variability will become more critical to agricultural production. The availability of days suitable for field work is driven by soil temperature and moisture, both of which may be altered by climate change. We projected changes in Illinois season length, spring field workability, and summer drought risk under three different emissions scenarios (B1, A1B, and A2) down to the crop district scale. Across all scenarios, thermal time units increased in parallel with a longer frost-free season...
2017: PloS One
https://www.readbyqxmd.com/read/28231144/effects-of-two-step-transamidation-of-wheat-semolina-on-the-technological-properties-of-gluten
#8
Salvatore Moscaritolo, Lucia Treppiccione, Antonio Ottombrino, Mauro Rossi
Celiac disease (CD) is an immune-mediated disorder caused by the ingestion of wheat gluten. A lifelong, gluten-free diet is required to alleviate symptoms and to normalize the intestinal mucosa. We previously found that transamidation reaction by microbial transglutaminase (mTG) was effective in down-regulating the gliadin-specific immune response in CD patients. In this study, the two-step transamidation protocol was adopted to treat commercial wheat semolina on a pilot scale. The effectiveness of the enzymatic reaction was tested by means of consolidated biochemical and immunological methods on isolated prolamins...
June 29, 2016: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28231093/identification-of-the-geographic-origin-of-parmigiano-reggiano-p-d-o-cheeses-deploying-non-targeted-mass-spectrometry-and-chemometrics
#9
Bert Popping, Emiliano De Dominicis, Mario Dante, Marco Nocetti
Parmigiano Reggiano is an Italian product with a protected designation of origin (P.D.O.). It is an aged hard cheese made from raw milk. P.D.O. products are protected by European regulations. Approximately 3 million wheels are produced each year, and the product attracts a relevant premium price due to its quality and all around the world well known typicity. Due to the high demand that exceeds the production, several fraudulent products can be found on the market. The rate of fraud is estimated between 20% and 40%, the latter predominantly in the grated form...
February 16, 2017: Foods (Basel, Switzerland)
https://www.readbyqxmd.com/read/28231049/original-research-paper-hydrazinyldiene-chroman-2-4-diones-in-inducing-growth-arrest-and-apoptosis-in-breast-cancer-cells-synergism-with-doxorubicin-and-correlation-with-physicochemical-properties
#10
Lulzime Ballazhi, Faik Imeri, Ahmed Jashari, Emil Popovski, Goran Stojković, Aleksandar J Dimovski, Bozhana Mikhova, Kristina Mladenovska
This study evaluates the effects of previously synthesized hydrazinyldiene-chroman-2,4-diones on cell proliferation and apoptosis, cell cycle distribution and migration capacity of MCF-7 breast cancer cells in synergy with doxorubicin. Physicochemical properties of the synthesized compounds were correlated with their structure and activity. Significant cell viability decrease in comparison with the effect of doxorubicin alone and the reference 4-hydroxycoumarin was observed when combination treatment comprising doxorubicin and the title compounds was applied...
March 1, 2017: Acta Pharmaceutica
https://www.readbyqxmd.com/read/28231000/ion-gated-gas-separation-through-porous-graphene
#11
Ziqi Tian, Shannon M Mahurin, Sheng Dai, De-En Jiang
Porous graphene holds great promise as a one-atom-thin, high-permeance membrane for gas separation, but to precisely control the pore size down to three to five angstroms proves challenging. Here we propose an ion-gated graphene membrane comprising a monolayer of ionic liquid coated porous graphene to dynamically modulate the pore size to achieve selective gas separation. This approach enables the otherwise non-selective large pores on the order of 1 nm in size to be selective for gases whose diameters range from three to four angstroms...
February 23, 2017: Nano Letters
https://www.readbyqxmd.com/read/28230994/artifact-free-and-detection-profile-independent-higher-order-fluorescence-correlation-spectroscopy-for-microsecond-resolved-kinetics-1-multi-detector-and-sub-binning-approach
#12
Farshad Abdollah-Nia, Martin P Gelfand, Alan K Van Orden
Fluorescence correlation spectroscopy (FCS) is a powerful tool in the time-resolved analysis of non-reacting or reacting molecules in solution, based on fluorescence intensity fluctuations. However, conventional (second-order) FCS alone is insufficient to measure all parameters needed to describe a reaction or mixture, including concentrations, fluorescence brightnesses, and forward and reverse rate constants. For this purpose, correlations of higher powers of fluorescence intensity fluctuations can be calculated to yield additional information from the single-photon data stream collected in an FCS experiment...
February 23, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28230989/development-of-the-first-generation-of-disulfide-based-subtype-selective-and-potent-covalent-pyruvate-dehydrogenase-kinase-1-pdk1-inhibitors
#13
Yifu Liu, Zuoquan Xie, Dan Zhao, Jin Zhu, Fei Mao, Shuai Tang, Hui Xu, Cheng Luo, Mei-Yu Geng, Min Huang, Jian Li
Pyruvate dehydrogenase kinases (PDKs) are overexpressed in most cancer cells and are responsible for aberrant glucose metabolism. We previously described Bis(4-morpholinyl thiocarbonyl)-disulfide (JX06, 16) as the first covalent inhibitor of PDK1. Here, based on the scaffold of 16, we identify two novel types of disulfide-based PDK1 inhibitors. The most potent analog, 3a, effectively inhibits PDK1 both at the molecular (kinact/Ki = 4.17×103M-1s-1) and the cellular level (down to 0.1 μM). In contrast to 16, 3a is a potent and subtype-selective inhibitor of PDK1 with >40-fold selectivity for PDK2-4...
February 23, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28230981/high-potency-phenylquinoxalinone-cystic-fibrosis-transmembrane-conductance-regulator-cftr-activators
#14
Jung-Ho Son, Jie S Zhu, Puay-Wah Phuan, Onur Cil, Andrew P Teuthorn, Colton K Ku, Sujin Lee, Alan S Verkman, Mark J Kurth
We previously identified phenylquinoxalinone CFTRact-J027 (4) as a cystic fibrosis transmembrane conductance regulator (CFTR) activator with an EC50 of ~200 nM, and demonstrated its therapeutic efficacy in mouse models of constipation. Here, structure-activity studies were done on 36 synthesized phenylquinoxalinone analogs to identify compounds with improved potency and altered metabolic stability. Synthesis of the phenylquinoxalinone core was generally accomplished by condensation of 1,2-phenylenediamines with substituted phenyloxoacetates...
February 23, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28230910/adhesives-for-bonded-molar-tubes-during-fixed-brace-treatment
#15
REVIEW
Declan T Millett, Nicky A Mandall, Rye Cr Mattick, Joy Hickman, Anne-Marie Glenny
BACKGROUND: Orthodontic treatment involves using fixed or removable appliances (dental braces) to correct the positions of teeth. The success of a fixed appliance depends partly on the metal attachments (brackets and bands) being glued to the teeth so that they do not become detached during treatment. Brackets (metal squares) are usually attached to teeth other than molars, where bands (metal rings that go round each tooth) are more commonly used. Orthodontic tubes (stainless steel tubes that allow wires to pass through them), are typically welded to bands but they may also be glued directly (bonded) to molars...
February 23, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28230871/an-in-situ-tem-study-of-the-surface-oxidation-of-palladium-nanocrystals-assisted-by-electron-irradiation
#16
Dejiong Zhang, Chuanhong Jin, He Tian, Yalin Xiong, Hui Zhang, Peisheng Qiao, Jie Fan, Ze Zhang, Z Y Li, Jixue Li
The surface oxidation of palladium nanocrystals plays an important role in changing the active sites and subsequently influencing the catalytic reactivity. Such a microscopy study on surface oxidation, down to the atomic scale, is essential for understanding the structure-property correlations of palladium nanocrystal based catalysts. Herein, we present an in situ atomic scale study on the surface oxidation behavior of palladium nanocrystals, which is induced by electron beam irradiation under low oxygen partial pressure and at room temperature inside an environmental transmission electron microscope...
February 23, 2017: Nanoscale
https://www.readbyqxmd.com/read/28230853/mesenchymal-stromal-cells-inhibit-cd25-expression-via-the-mtor-pathway-to-potentiate-t-cell-suppression
#17
Hyun Seung Yoo, Kyuheon Lee, Kwangmin Na, Yong Xu Zhang, Hyun-Ja Lim, TacGhee Yi, Sun U Song, Myung-Shin Jeon
Mesenchymal stromal cells (MSCs) are known to suppress T-cell activation and proliferation. Several studies have reported that MSCs suppress CD25 expression in T cells. However, the molecular mechanism underlying MSC-mediated suppression of CD25 expression has not been fully examined. Here, we investigated the mTOR pathway, which is involved in CD25 expression in T cells. We showed that MSCs inhibited CD25 expression, which was restored in the presence of an inducible nitric oxide synthase (iNOS) inhibitor...
February 23, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28230817/common%C3%A2-chemical%C3%A2-inductors%C3%A2-of%C3%A2-replication%C3%A2-stress-%C3%A2-focus%C3%A2-on%C3%A2-cell-based%C3%A2-studies
#18
REVIEW
Eva Vesela, Katarina Chroma, Zsofia Turi, Martin Mistrik
DNA replication is a highly demanding process regarding the energy and material supply and must be precisely regulated, involving multiple cellular feedbacks. The slowing down or stalling of DNA synthesis and/or replication forks is referred to as replication stress (RS). Owing to the complexity and requirements of replication, a plethora of factors may interfere and challenge the genome stability, cell survival or affect the whole organism. This review outlines chemical compounds that are known inducers of RS and commonly used in laboratory research...
February 21, 2017: Biomolecules
https://www.readbyqxmd.com/read/28230744/s-allylmercaptocysteine%C3%A2-attenuates%C3%A2-cisplatin-induced%C3%A2-nephrotoxicity%C3%A2-through%C3%A2-suppression%C3%A2-of%C3%A2-apoptosis-%C3%A2-oxidative%C3%A2-stress-%C3%A2-and%C3%A2-inflammation
#19
Xiaosong Zhu, Xiaoyan Jiang, Ang Li, Zhongxi Zhao, Siying Li
Cisplatin is a potent chemotherapeutic agent, but its clinical usage is limited by nephrotoxicity. S-allylmercaptocysteine (SAMC), one of the water-soluble organosulfur garlic derivatives, has antioxidant and anti-inflammatory properties and plays an important role in protecting cells from apoptosis. This study aims to examine the protective effects of SAMC on cisplatin nephrotoxicity and to explore the mechanism of its renoprotection. Rats were treated with cisplatin with or without pre-treatment with SAMC...
February 20, 2017: Nutrients
https://www.readbyqxmd.com/read/28230535/gated-hall-effect-measurements-on-selectively-grown-ingaas-nanowires
#20
Fredrik Gustav Lindelöw, Cezar Zota, Erik Lind
InGaAs nanowires is one of the promising material systems of replacing silicon in future CMOS transistors, due to its high electron mobility, in combination with the excellent electrostatic control from the tri-gate geometry. In this article, we report on gated Hall measurements on single and multiple In0.85Ga0.15As nanowires, selectively grown in a Hall bridge geometry with nanowire widths down to 50 nm and thicknesses of 10 nm. The gated nanowires can be used as junctionless transistors, which allows for a simplified device processing as no regrowth of contact layer or ion implantation is needed, which is especially beneficial as transistor dimensions are scaled down...
February 23, 2017: Nanotechnology
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