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https://www.readbyqxmd.com/read/28102680/ionicity-of-protic-ionic-liquid-quantitative-measurement-by-spectroscopic-methods
#1
Minming Shen, Yuyang Zhang, Kaizhou Chen, Siying Che, Jia Yao, Haoran Li
The ionicity value, which is a key property of protic ionic liquids, was obtained by the attenuated total reflection Fourier transform infrared spectroscopy and nuclear magnetic resonance respectively for a protic ionic liquid: n-propylammonium acetate. The method of potentiometric titration is found not suitable for such kind of ionic liquid as the ∆pKa of the compositing acid and base is relatively small. In the IR spectrum, molecular species can be directly observed in the range 1200-1800 cm-1, and the ratio of ionic and molecular species can be quantitatively calculated by the area of characteristic absorption peaks calibrated by standard curve from NaAc/HAc solutions...
January 19, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28089185/joint-replacement-volume-positively-correlates-with-improved-hospital-performance-on-centers-for-medicare-and-medicaid-services-quality-metrics
#2
Rachel A Sibley, Vanessa Charubhumi, Lorraine H Hutzler, Albit R Paoli, Joseph A Bosco
BACKGROUND: The Center for Medicare and Medicaid Services (CMS) is transitioning Medicare from a fee-for-service program into a value-based pay-for-performance program. In order to accomplish this goal, CMS initiated 3 programs that attempt to define quality and seek to reward high-performing hospitals and penalize poor-performing hospitals. These programs include (1) penalties for hospital-acquired conditions (HACs), (2) penalties for excess readmissions for certain conditions, and (3) performance on value-based purchasing (VBP)...
December 21, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28081490/mesoporous-activated-carbon-prepared-from-naoh-activation-of-rattan-lacosperma-secundiflorum-hydrochar-for-methylene-blue-removal
#3
Md Azharul Islam, M J Ahmed, W A Khanday, M Asif, B H Hameed
Hydrothermal carbonization of biomass wastes presents a promising step in the production of cost-effective activated carbon. In the present work, mesoporous activated carbon (HAC) was prepared by the hydrothermal carbonization of rattan furniture wastes followed by NaOH activation. The textural and morphological characteristics, along with adsorption performance of prepared HAC toward methylene blue (MB) dye, were evaluated. The effects of common adsorption variables on performance resulted in a removal efficiency of 96% for the MB sample at initial concentration of 25mg/L, solution pH of 7, 30°C, and 8h...
January 9, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28059442/hydroxyapatite-cement-cranioplasty-following-translabyrinthine-approach-long-term-study-of-369-cases
#4
Peter G Volsky, Todd A Hillman, Kellen J Stromberg, Farrel J Buchinsky, Douglas A Chen, Neal M Jackson, Moisés A Arriaga
OBJECTIVE: To report the authors' experience with hydroxyapatite cement (HAC) cranioplasty and analyze the material's long-term safety and efficacy in repairing translabyrinthine skull-base defects by examining adverse events, specifically cerebrospinal fluid (CSF) leaks and surgical site infections. STUDY DESIGN: Retrospective case-control study (primary study arm); prospective cross-sectional study of patients not examined within the last 5 years (secondary arm)...
January 6, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28052216/pattern-of-hydroxyapatite-crystal-growth-on-bleached-enamel-following-the-application-of-two-antioxidants-an-atomic-force-microscope-study
#5
Chitra P Bhusari, Divya S Sharma
OBJECTIVES: This study observed the topographical pattern of hydroxyapatite deposition and growth (D&G) on bleached enamel following application of two antioxidants (sodium ascorbate and catalase) using atomic force microscope. STUDY DESIGN: Twenty enamel specimens (4×3×2mm), prepared from extracted impacted third molars, were mounted in self-cure acrylic and randomly grouped as: Group I-untreated; Group II- 35%H2O2; Group III- 35%H2O2 + artificial saliva; Group IV- 35%H2O2 + catalase+ artificial saliva; Group V- 35%H2O2 + sodium ascorbate+ artificial saliva...
2017: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28039852/pathway-from-delirium-to-death-potential-in-hospital-mediators-of-excess-mortality
#6
Kumar Dharmarajan, Sunil Swami, Ray Y Gou, Richard N Jones, Sharon K Inouye
OBJECTIVES: (1) To determine the relationship of incident delirium during hospitalization with 90-day mortality; (2) to identify potential in-hospital mediators through which delirium increases 90-day mortality. DESIGN: Analysis of data from Project Recovery, a controlled clinical trial of a delirium prevention intervention from 1995 to 1998 with follow-up through 2000. SETTING: Large academic hospital. PARTICIPANTS: Patients ≥70 years old without delirium at hospital admission who were at intermediate-to-high risk of developing delirium and received usual care only...
December 30, 2016: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/28030782/a-comprehensive-review-of-group-level-model-performance-in-the-presence-of-heteroscedasticity-can-a-single-model-control-type-i-errors-in-the-presence-of-outliers
#7
Jeanette A Mumford
Even after thorough preprocessing and a careful time series analysis of functional magnetic resonance imaging (fMRI) data, artifact and other issues can lead to violations of the assumption that the variance is constant across subjects in the group level model. This is especially concerning when modeling a continuous covariate at the group level, as the slope is easily biased by outliers. Various models have been proposed to deal with outliers including models that use the first level variance or that use the group level residual magnitude to differentially weight subjects...
December 25, 2016: NeuroImage
https://www.readbyqxmd.com/read/28013335/hydroxyapatite-ceramic-implants-for-cranioplasty-in-children-a-single-center-experience
#8
Laura Zaccaria, Sasha Job Tharakan, Stefan Altermatt
PURPOSE: The use of hydroxyapatite ceramic (HAC) implants for the treatment of skull defects in pediatric patients started 2010 at our institution. Ceramic implants facilitate osteoblast migration and therefore optimize osteointegration with the host bone. The purpose of this study is to report a single-center experience with this treatment modality. METHODS: A retrospective review of all patients from July 2010 through June 2014 undergoing a cranioplasty using hydroxyapatite ceramic implant and managed at a single institution was performed...
December 24, 2016: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/27988487/separation-and-sensitive-detection-of-lanthanides-by-capillary-electrophoresis-and-contactless-conductivity-detection
#9
H Ecem Yelkenci, Nevin Öztekin
A rapid and sensitive capillary zone electrophoresis method for the simultaneous separation and determination of lanthanide ions, combined with capacitively coupled contactless conductivity detection (C(4)D), is reported. The influence of experimental parameters on separation was investigated. The optimal separation conditions were obtained when 4.5 mM 2-hydroxyisobutyric acid and 1 mM acetic acid (HAc) at pH 4.5 were used as buffer solution. Under these conditions, complete separation of all 14 lanthanide ions was achieved in 6 min...
December 17, 2016: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/27980064/efficient-size-independent-chromosome-delivery-from-yeast-to-cultured-cell-lines
#10
David M Brown, Yujia A Chan, Prashant J Desai, Peter Grzesik, Lauren M Oldfield, Sanjay Vashee, Jeffrey C Way, Pamela A Silver, John I Glass
The delivery of large DNA vectors (>100 000 bp) remains a limiting step in the engineering of mammalian cells and the development of human artificial chromosomes (HACs). Yeast is commonly used to assemble genetic constructs in the megabase size range, and has previously been used to transfer constructs directly into cultured cells. We improved this method to efficiently deliver large (1.1 Mb) synthetic yeast centromeric plasmids (YCps) to cultured cell lines at rates similar to that of 12 kb YCps. Synchronizing cells in mitosis improved the delivery efficiency by 10-fold and a statistical design of experiments approach was employed to boost the vector delivery rate by nearly 300-fold from 1/250 000 to 1/840 cells, and subsequently optimize the delivery process for multiple mammalian, avian, and insect cell lines...
December 15, 2016: Nucleic Acids Research
https://www.readbyqxmd.com/read/27980047/practical-immunopet-radiotracer-design-considerations-for-human-immune-checkpoint-imaging
#11
Aaron Thomas Mayer, Arutselvan Natarajan, Sydney Gordon, Roy Maute, Melissa McCracken, Aaron Ring, Irving Weissman, Sam Sanjiv Gambhir
Immune checkpoint blockade has emerged as a promising cancer treatment paradigm. Unfortunately, there are still a large number of patients and malignancies that do not respond to therapy. A major barrier to validating biomarkers for the prediction and monitoring of responders to clinical checkpoint blockade has been the lack of imaging tools to accurately assess dynamic immune checkpoint expression. Here we sought to optimize noninvasive ImmunoPET (positron emission tomography) imaging of human PD-L1 expression, in a pre-clinical model, using a small high affinity engineered protein scaffold (HAC-PD1)...
December 15, 2016: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/27976468/molecular-fingerprint-comparison-of-closely-related-rose-varieties-based-on-uhplc-hrms-analysis-and-chemometrics
#12
Ludivine Riffault-Valois, Lucille Blanchot, Cyril Colas, Emilie Destandau, Laure Pasquier, Patrice André, Claire Elfakir
INTRODUCTION: The "Jardin de Granville" modern rose variety not only combines the morphological properties of its two parental cultivars, but also possesses better agronomic characteristics (abundant blooms, strong growth and vitality, high resistance to common rose diseases). In addition, it shows remarkable biological properties such as a high ability to decrease inflammatory and oxidative stress on skin cells. That is why Parfums Christian Dior selected this rose variety to be an active ingredient in luxury cosmetics...
January 2017: Phytochemical Analysis: PCA
https://www.readbyqxmd.com/read/27975091/structure-and-infrared-spectra-of-hydrocarbon-interstellar-dust-analogs
#13
Germán Molpeceres, Vicente Timón, Miguel Jiménez-Redondo, Rafael Escribano, Belén Maté, Isabel Tanarro, Víctor J Herrero
A theoretical study of the structure and mid infrared (IR) spectra of interstellar hydrocarbon dust analogs is presented, based on DFT calculations of amorphous solids. The basic molecular structures for these solids are taken from two competing literature models. The first model considers small aromatic units linked by aliphatic chains. The second one assumes a polyaromatic core with hydrogen and methyl substituents at the edges. The calculated spectra are in reasonably good agreement with those of aliphatic-rich and graphitic-rich samples of hydrogenated amorphous carbon (HAC) generated in our laboratory...
January 4, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27967226/use-of-a-computer-guided-glucose-management-system-to-improve-glycemic-control-and-address-national-quality-measures-a-7-year-retrospective-observational-study-at-a-tertiary-care-teaching-hospital
#14
Robert J Tanenberg, Sandra Hardee, Caitlin Rothermel, Almond J Drake
Objectives Inpatient hyperglycemia, hypoglycemia, and glucose variability are associated with increased mortality. The use of electronic Glucose Management Systems (eGMS) to guide intravenous (IV) insulin infusion have been found to significantly improve blood glucose (BG) control. This retrospective observational study evaluated the 7-year (1/2009-12/2015) impact of the EndoTool(®) eGMS in intensive and intermediate units at Vidant Medical Center, a 900-bed tertiary teaching hospital. Methods Patients assigned to eGMS had indications for IV insulin infusion, including uncontrolled diabetes, stress hyperglycemia, and/or post-operative BG levels >140 mg/dL...
December 14, 2016: Endocrine Practice
https://www.readbyqxmd.com/read/27934436/verdazyl-radical-a-building-block-for-a-six-spin-center-2p-3d-4f-single-molecule-magnet
#15
Ghénadie Novitchi, Sergiu Shova, Yanhua Lan, Wolfgang Wernsdorfer, Cyrille Train
The versatile verdazyl family provides a new member as its reduced form 1,5-dimethyl-3-[3'-(hydroxymethyl)-2'-pyridine]-6-oxotetrazane (H3vdpyCH2OH). Upon oxidation and deprotonation in the presence of the acetate salts of Co(II) and Dy(III), the vdpyCH2OH radical is able to self-assemble [(vdpyCH2O)2Co2Dy2ac8] (Hac = HO2CCH3), a 2p-3d-4f cluster displaying single-molecule-magnet properties.
December 5, 2016: Inorganic Chemistry
https://www.readbyqxmd.com/read/27930503/ppv-and-the-psis-hac-measures
#16
Bradford D Winters, Peter J Pronovost
No abstract text is available yet for this article.
January 2017: Medical Care
https://www.readbyqxmd.com/read/27922910/impact-of-medicare-s-nonpayment-program-on-hospital-acquired-conditions
#17
Caroline P Thirukumaran, Laurent G Glance, Helena Temkin-Greener, Meredith B Rosenthal, Yue Li
BACKGROUND: Medicare's Nonpayment Program of 2008 (hereafter called Program) withholds hospital reimbursement for costs related to hospital-acquired conditions (HACs). Little is known whether a hospital's Medicare patient load [quantified by the hospital's Medicare utilization ratio (MUR), which is the proportion of inpatient days financed by Medicare] influences its response to the Program. OBJECTIVE: To determine whether the Program was associated with changes in HAC incidence, and whether this association varies across hospitals with differential Medicare patient load...
December 5, 2016: Medical Care
https://www.readbyqxmd.com/read/27911011/fragment-based-design-synthesis-and-biological-evaluation-of-1-substituted-indole-2-carboxylic-acids-as-selective-mcl-1-inhibitors
#18
Ziqian Wang, Wenjie Xu, Ting Song, Zongwei Guo, Lu Liu, Yudan Fan, Anhui Wang, Zhichao Zhang
Based on a known selective Mcl-1 inhibitor, 6-chloro-3-(3-(4-chloro-3,5-dimethylphenoxy)propyl)-1H-indole-2-carboxylic acid, we applied a fragment-based approach to obtain new molecules that extended into the p1 pocket of the BH3 groove and then exhibited binding selectivity for the Mcl-1 over the Bcl-2 protein. After we deconstructed the 1H-indole-2-carboxylic acid from the parental molecule, a benzenesulfonyl was substituted at the 1-position to adopt a geometry preferred for accessing the p1 pocket according to the binding mode of the parental molecule identified by X-ray crystallography...
December 2, 2016: Archiv der Pharmazie
https://www.readbyqxmd.com/read/27861869/s100b%C3%A2-%C3%A2-a1-celisa-a-novel-potency-assay-and-screening-tool-for-redifferentiation-stimuli-of-human-articular-chondrocytes
#19
Jose Diaz-Romero, Sibylle Kürsener, Sandro Kohl, Dobrila Nesic
During monolayer expansion, a necessary step in autologous chondrocyte implantation, human articular chondrocytes (HAC) dedifferentiate and lose their capacity to produce stable hyaline cartilage. Determining HAC potency and learning how to trigger their redifferentiation would improve cell-based cartilage regeneration therapies. We previously identified S100B and S100A1 proteins as markers of HAC redifferentiation potential. Here, we aimed to: (i) demonstrate a correlation between S100B + A1-positive HAC in monolayer culture and their neochondrogenesis capacity in pellet culture; (ii) develop an S100B + A1 cell-based ELISA, and (iii) prove that S100B + A1 induction in HAC increases their chondrogenic capacity...
November 11, 2016: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/27848006/clinical-fracture-risk-evaluated-by-hierarchical-agglomerative-clustering
#20
C Kruse, P Eiken, P Vestergaard
: Clustering analysis can identify subgroups of patients based on similarities of traits. From data on 10,775 subjects, we document nine patient clusters of different fracture risks. Differences emerged after age 60 and treatment compliance differed by hip and lumbar spine bone mineral density profiles. INTRODUCTION: The purposes of this study were to establish and quantify patient clusters of high, average and low fracture risk using an unsupervised machine learning algorithm...
November 16, 2016: Osteoporosis International
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