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https://www.readbyqxmd.com/read/28738626/elimination-of-interference-from-water-in-kbr-disk-ft-ir-spectra-of-solid-biomaterials-by-chemometrics-solved-with-kinetic-modeling
#1
Sherald H Gordon, Rogers E Harry-O'kuru, Abdellatif A Mohamed
Infrared analysis of proteins and polysaccharides by the well known KBr disk technique is notoriously frustrated and defeated by absorbed water interference in the important amide and hydroxyl regions of spectra. This interference has too often been overlooked or ignored even when the resulting distortion is critical or even fatal, as in quantitative analyses of protein secondary structure, because the water has been impossible to measure or eliminate. Therefore, a new chemometric method was devised that corrects spectra of materials in KBr disks by mathematically eliminating the water interference...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738594/optical-sensor-for-fluoride-determination-in-tea-sample-based-on-evanescent-wave-interaction-and-fiber-optic-integration
#2
Yan Xiong, Jiayi Wu, Qing Wang, Jing Xu, Shenwen Fang, Jie Chen, Ming Duan
In this work, a miniaturized optical sensor was developed for fluoride determination in tea samples to evaluate their specific risks of fluorosis for public health based on evanescent-wave interaction. The sensor design was integrated on the optical fiber by utilizing the evanescent wave produced on the fiber surface to react with sensing reagents. According to the absorption change at 575nm, fluoride could be determined by colorimetric method and evaluated by Beer's law. With improved performances of small detection volume (1...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738578/a-simple-method-for-the-multi-elemental-analysis-of-beer-using-total-reflection-x-ray-fluorescence
#3
Ednilton M Gama, Clésia C Nascentes, Roberta P Matos, Gabrielle de C Rodrigues, Guilherme D Rodrigues
A method of direct analysis for quantification of 15 inorganic elements (P, S, Cl, K, Ca, Mn, Fe, Ni, Cu, Zn, Br, As, Rb, Sr and Pb) in beers by Total Reflection X-Ray Fluorescence (TXRF) was developed. The experimental conditions were optimized. Direct analysis was compared with the acid digestion procedure to evaluate the effect matrix and the results were satisfactory. The evaluation of the accuracy and precision was realized by analysis of two certified reference materials of natural and waste water. For the majority of the elements, good agreement was achieved between the certified value and the value measured in the CRM´s...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28736603/effects-of-different-kinds-of-beers-on-the-surface-roughness-of-glazed-and-polished-methacrylate-and-silorane-based-composites-a-1-month-study
#4
Ugur Erdemir, Murat Tiryaki, Gunce Saygi, Taner Yücel, Sevda Ozel Yildiz, Esra Yıldız
BACKGROUND: The aim of this in vitro study was to evaluate the effect of different kind of beers on the surface roughness of glazed and polished methacrylate- and Silorane-based resin composites after different immersion periods. METHODS: Methacrylate-based resin composites (Tetric N-Ceram, Ceram-X) and a Silorane-based resin composite (Filtek Silorane) were tested in the study. A total of 126 specimens (n=42 for each composite) were fabricated using a cylindrical custom metal mould...
January 2017: Annali di Stomatologia
https://www.readbyqxmd.com/read/28736322/clinical-outcomes-of-chemotherapy-na%C3%A3-ve-men-with-metastatic-castration-resistant-prostate-cancer-and-low-baseline-psa-treated-with-enzalutamide-vs-placebo
#5
Mary-Ellen Taplin, Andrew J Armstrong, Ping Lin, Andrew Krivoshik, De Phung, Teresa Parli, Bertrand Tombal, Tomasz M Beer
PURPOSE: Metastatic castration-resistant prostate cancer with low baseline prostate-specific antigen represents an early stage in the natural history of castration-resistant prostate cancer disease progression (low-volume disease), low prostate-specific antigen-producing disease, or disease less dependent on androgen receptor biology (high-volume disease). We analyzed outcomes in men with low prostate-specific antigen and high disease burden who received the oral androgen-receptor inhibitor enzalutamide in the PREVAIL study...
July 20, 2017: Journal of Urology
https://www.readbyqxmd.com/read/28736131/variation-in-organization-of-transient-ischemic-attack-care-in-the-netherlands-a-nationwide-survey-study
#6
Fenna Floortje Muller, Frank de Beer, Marieke Christine Visser
BACKGROUND: Previous research has shown the importance of urgent initiation of antiplatelet therapy after transient ischemic attack (TIA) to reduce the risk of stroke. Many hospitals in the Netherlands have therefore implemented rapid pathways for assessment of patients with TIA. Dutch stroke guidelines lack clear directives for organization of TIA assessment and thus allow for variation. The aim of this study was to investigate variation in organization of TIA assessment in Dutch hospitals...
July 20, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28735890/prognostic-validation-of-sky92-and-its-combination-with-iss-in-an-independent-cohort-of-patients-with-multiple-myeloma
#7
Erik H van Beers, Martin H van Vliet, Rowan Kuiper, Leonie de Best, Kenneth C Anderson, Ajai Chari, Sundar Jagannath, Andrzej Jakubowiak, Shaji K Kumar, Joan B Levy, Daniel Auclair, Sagar Lonial, Donna Reece, Paul Richardson, David S Siegel, A Keith Stewart, Suzanne Trudel, Ravi Vij, Todd M Zimmerman, Rafael Fonseca
BACKGROUND: High risk and low risk multiple myeloma patients follow a very different clinical course as reflected in their PFS and OS. To be clinically useful, methodologies used to identify high and low risk disease must be validated in representative independent clinical data and available so that patients can be managed appropriately. A recent analysis has indicated that SKY92 combined with the International Staging System (ISS) identifies patients with different risk disease with high sensitivity...
July 4, 2017: Clinical Lymphoma, Myeloma & Leukemia
https://www.readbyqxmd.com/read/28735452/characterization-of-polymeric-substance-classes-in-cereal-based-beverages-using-asymmetrical-flow-field-flow-fractionation-with-a-multi-detection-system
#8
Georg Krebs, Thomas Becker, Martina Gastl
Cereal-based beverages contain a complex mixture of various polymeric macromolecules including polysaccharides, peptides, and polyphenols. The molar mass of polymers and their degradation products affect different technological and especially sensory parameters of beverages. Asymmetrical flow field-flow fractionation (AF4) coupled with multi-angle light scattering (MALS) and refractive index detection (dRI) or UV detection (UV) is a technique for structure and molar mass distribution analysis of macromolecules commonly used for pure compound solutions...
July 22, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28731564/alcohol-related-knowledge-and-alcohol-related-norms-in-four-to-six-year-olds-evidence-from-the-dutch-electronic-appropriate-beverage-task
#9
Carmen Voogt, Roy Otten, Marloes Kleinjan, Rutger Engels, Emmanuel Kuntsche
BACKGROUND: Limited research is available on children's alcohol-related knowledge and alcohol-related norms, yet a better comprehension of these factors may be crucial in explaining alcohol use later in life. This study provides insights into alcohol-related knowledge and alcohol-related norms in four- to six-year-olds. METHODS: Participating children (N=329; 48.9% boys) were shown, on a tablet, 18 drawings depicting 72 male and female adults and/or children in various situations and were asked to indicate what the depicted persons drank by touching one of 12 depicted beverages (four alcoholic; eight non-alcoholic)...
July 21, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28731509/keeping-safe-continuous-glucose-monitoring-cgm-in-persons-with-type-1-diabetes-and-impaired-awareness-of-hypoglycaemia-a-qualitative-study
#10
A F Vloemans, C A J van Beers, M de Wit, W Cleijne, S M Rondags, P H Geelhoed-Duijvestijn, M H H Kramer, E H Serné, F J Snoek
AIM: To further our understanding of individual use and experience of continuous glucose monitoring (CGM) in adults with Type 1 diabetes and impaired awareness of hypoglycaemia, we conducted a qualitative study supplementary to a randomized controlled trial, using semi-structured interviews. METHODS: Twenty-three participants of the IN CONTROL trial were interviewed within 4 weeks after the last study visit. The interview centred around experiences of CGM, taking into account the person's expectations prior to the trial...
July 21, 2017: Diabetic Medicine: a Journal of the British Diabetic Association
https://www.readbyqxmd.com/read/28731350/gastric-and-duodenal-ethanol-concentrations-after-intake-of-alcoholic-beverages-in-postprandial-conditions
#11
Jari Rubbens, Danny Riethorst, Joachim Brouwers, Kris Wolfs, Erwin Adams, Jan Tack, Patrick Augustijns
INTRODUCTION: This study determined intraluminal ethanol concentrations (stomach and duodenum) in fed healthy volunteers after the consumption of common alcoholic beverages (beer, wine and whisky). The results of this study were compared with a previous study in fasted volunteers. MATERIALS AND METHODS: Five healthy volunteers were recruited in a cross-over study. The fed state was simulated by ingestion of 250 mL of Nutridrink Compact® Neutral. Volunteers subsequently consumed two standard units of beer (Stella Artois®, 500 mL, 5...
July 21, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28729512/hydraulic-control-of-tuna-fins-a-role-for-the-lymphatic-system-in-vertebrate-locomotion
#12
Vadim Pavlov, Benyamin Rosental, Nathaniel F Hansen, Jody M Beers, George Parish, Ian Rowbotham, Barbara A Block
The lymphatic system in teleost fish has genetic and developmental origins similar to those of the mammalian lymphatic system, which is involved in immune response and fluid homeostasis. Here, we show that the lymphatic system of tunas functions in swimming hydrodynamics. Specifically, a musculo-vascular complex, consisting of fin muscles, bones, and lymphatic vessels, is involved in the hydraulic control of median fins. This specialization of the lymphatic system is associated with fish in the family Scombridae and may have evolved in response to the demand for swimming and maneuvering control in these high-performance species...
July 21, 2017: Science
https://www.readbyqxmd.com/read/28729303/amotosalen-uva-pathogen-inactivation-technology-reduces-platelet-activatability-induces-apoptosis-and-accelerates-clearance
#13
Simona Stivala, Sara Gobbato, Laura Infanti, Martin F Reiner, Nicole Bonetti, Sara C Meyer, Giovanni G Camici, Thomas F Lüscher, Andreas Buser, Jürg H Beer
Amotosalen and ultraviolet A photochemical-based pathogen reduction using the InterceptTM Blood System is an effective and established technology for platelet and plasma components, which is adopted in more than 40 countries worldwide. Several reports point towards a reduced platelet function after Amotosalen/UVA exposure. The current study was undertaken to identify the mechanisms responsible for the early impairment of platelet function by the InterceptTM Blood System. Twenty-five platelet apheresis units were collected from healthy volunteers following standard procedures and split into 2 components, one untreated and the other treated with Amotosalen/UVA...
July 20, 2017: Haematologica
https://www.readbyqxmd.com/read/28727912/multivariate-analysis-for-quantification-of-plutonium-iv-in-nitric-acid-based-on-absorption-spectra
#14
Amanda M Lines, Susan R Adami, Sergey I Sinkov, Gregg J Lumetta, Samuel A Bryan
Development of more effective, reliable, and fast methods for monitoring process streams is a growing opportunity for analytical applications. Many fields can benefit from on-line monitoring, including the nuclear fuel cycle where improved methods for monitoring radioactive materials will facilitate maintenance of proper safeguards and ensure safe and efficient processing of materials. On-line process monitoring with a focus on optical spectroscopy can provide a fast, non-destructive method for monitoring chemical species...
July 20, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28727743/effect-of-depth-information-on-multiple-object-tracking-in-three-dimensions-a-probabilistic-perspective
#15
James R H Cooke, Arjan C Ter Horst, Robert J van Beers, W Pieter Medendorp
Many daily situations require us to track multiple objects and people. This ability has traditionally been investigated in observers tracking objects in a plane. This simplification of reality does not address how observers track objects when targets move in three dimensions. Here, we study how observers track multiple objects in 2D and 3D while manipulating the average speed of the objects and the average distance between them. We show that performance declines as speed increases and distance decreases and that overall tracking accuracy is always higher in 3D than in 2D...
July 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28726932/cationic-all-halogen-bonding-rotaxanes-for-halide-anion-recognition
#16
Xiaoxiong Li, Jason Y C Lim, Paul D Beer
A family of cationic halogen bonding [2]rotaxanes have been synthesised via an active-metal template synthetic strategy. (1)H NMR spectroscopic anion titration investigations reveal these interlocked host systems recognize halides selectively over oxoanions in aqueous-organic solvent media. Furthermore, systematically modulating the rigidity and size of the rotaxanes' anion binding cavities via metal complexation, as well as by varying the number of halogen bond-donor groups in the axle component, was found to dramatically influence halide anion selectivity...
July 20, 2017: Faraday Discussions
https://www.readbyqxmd.com/read/28726083/exploring-factors-associated-with-declining-hiv-diagnoses-among-african-american-females
#17
Donna Hubbard McCree, William L Jeffries, Linda Beer, Zanetta Gant, Kimberlee Elmore, Madeline Sutton
HIV diagnoses among females in the USA declined 40% during 2005-2014 with the largest decline (42%) among Black/African Americans. African American females remain disproportionately affected. We explored contributions of STD rates and sexual risk behaviors among African American females, HIV diagnoses among potential male partners, and sexual risk behaviors and viral suppression rates among HIV-positive potential male partners to declining rates of HIV diagnoses among African American females. Results suggest temporal trends in the factors that increase HIV infectiousness and transmissibility within sexual networks, i...
July 19, 2017: Journal of Racial and Ethnic Health Disparities
https://www.readbyqxmd.com/read/28725447/anti-saccharomyces-cerevisiae-antibodies-asca-are-associated-with-body-fat-mass-and-systemic-inflammation-but-not-with-dietary-yeast-consumption-a-cross-sectional-study
#18
Anne Stine Kvehaugen, Martin Aasbrenn, Per G Farup
BACKGROUND: Baker's/brewer's yeast, Saccharomyces cerevisiae, has been used as an alternative to antibiotic growth promoters to improve growth performance in animals. In humans, Saccharomyces cerevisiae is among the most commonly detected fungi in fecal samples and likely originates from food. Recently, an association between anti-Saccharomyces cerevisiae antibodies (ASCA) and obesity in humans was suggested, but the cause of the elevated ASCA levels is not clear. Our aim was to study ASCA in morbidly obese subjects and explore potential associations with anthropometrics, diet, co-morbidities and biomarkers of inflammation and gut permeability...
2017: BMC Obesity
https://www.readbyqxmd.com/read/28724384/deficiency-of-pi3-kinase-catalytic-isoforms-p110%C3%AE-and-p110%C3%AE-in-mice-enhances-the-il-17-g-csf-axis-and-induces-neutrophilia
#19
Kirsten Bucher, Fee Schmitt, Benedikt Mothes, Carolin Blumendeller, Daniel Schäll, Roland Piekorz, Emilio Hirsch, Bernd Nürnberg, Sandra Beer-Hammer
BACKGROUND: Phosphoinositide 3-kinase γ (PI3Kγ) and PI3Kδ are second messenger-generating enzymes with key roles in proliferation, differentiation, survival, and function of leukocytes. Deficiency of the catalytic subunits p110γ and p110δ of PI3Kγ and PI3Kδ in p110γ/δ(-/-) mice leads to defective B- and T-cell homeostasis. Here we examined the role of p110γ and p110δ in the homeostasis of neutrophils by analyzing p110γ(-/-), p110δ(-/-) and p110γ/δ(-/-) mice. METHODS: Neutrophils and T cells in leukocyte suspensions from the bone marrow (BM), blood, spleen and lung were analyzed by flow cytometry...
July 19, 2017: Cell Communication and Signaling: CCS
https://www.readbyqxmd.com/read/28723508/targeting-adaptive-pathways-in-metastatic-treatment-resistant-prostate-cancer-update-on-the-stand-up-2-cancer-prostate-cancer-foundation-supported-west-coast-prostate-cancer-dream-team
#20
Rahul Aggarwal, Tomasz M Beer, Martin Gleave, Joshua M Stuart, Matthew Rettig, Christopher P Evans, Jack Youngren, Joshi J Alumkal, Jiaoti Huang, George Thomas, Owen Witte, Eric J Small
The Stand Up 2 Cancer/Prostate Cancer Foundation-funded West Coast Dream Team project is a prospective multi-institutional study focused on acquiring metastatic castration-resistant prostate cancer (mCRPC) biopsy tissue at the time of resistance to abiraterone or enzalutamide. It is the first large-scale study designed to analyze mCRPC tissue specifically in this patient population. Study accrual is on target, with 261 out of a planned 300 metastatic tumor biopsies performed by August 2016. Paired biopsies have been completed in 42 patients, with paired genomic data before and after therapy obtained in 26 cases...
December 2016: European Urology Focus
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