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https://www.readbyqxmd.com/read/28393876/origin-of-reduced-magnetization-and-domain-formation-in-small-magnetite-nanoparticles
#1
Zlatko Nedelkoski, Demie Kepaptsoglou, Leonardo Lari, Tianlong Wen, Ryan A Booth, Samuel D Oberdick, Pedro L Galindo, Quentin M Ramasse, Richard F L Evans, Sara Majetich, Vlado K Lazarov
The structural, chemical, and magnetic properties of magnetite nanoparticles are compared. Aberration corrected scanning transmission electron microscopy reveals the prevalence of antiphase boundaries in nanoparticles that have significantly reduced magnetization, relative to the bulk. Atomistic magnetic modelling of nanoparticles with and without these defects reveals the origin of the reduced moment. Strong antiferromagnetic interactions across antiphase boundaries support multiple magnetic domains even in particles as small as 12-14 nm...
April 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28334667/redox-controlled-release-dynamics-of-thallium-in-periodically-flooded-arable-soil
#2
Svetlana Antić-Mladenović, Tina Frohne, Mirjana Kresović, Hans-Joachim Stärk, Dubravka Savić, Vlado Ličina, Jörg Rinklebe
To our knowledge, this is the first work to mechanistically study the impact of the redox potential (EH) and principal factors, such as pH, iron (Fe), manganese (Mn), dissolved organic carbon (DOC), dissolved inorganic carbon (DIC), chlorides (Cl(-)) and sulfates (SO4(2-)), on the release dynamics of thallium (Tl) in periodically flooded soil. We simulated flooding using an automated biogeochemical microcosm system that allows for systematical control of pre-defined redox windows. The EH value was increased mechanistically at intervals of approximately 100 mV from reducing (-211 mV) to oxidizing (475 mV) conditions...
March 16, 2017: Chemosphere
https://www.readbyqxmd.com/read/28327978/a-dataset-of-images-and-morphological-profiles-of-30-000-small-molecule-treatments-using-the-cell-painting-assay
#3
Mark-Anthony Bray, Sigrun M Gustafsdottir, Vebjorn Ljosa, Shantanu Singh, Katherine L Sokolnicki, Joshua A Bittker, Nicole E Bodycombe, Vlado Dancík, Thomas P Hasaka, C Suk-Yee Hon, Melissa M Kemp, Kejie Li, Deepika Walpita, Mathias J Wawer, Todd R Golub, Stuart L Schreiber, Paul A Clemons, Alykhan F Shamji, Anne E Carpenter
Background: Large-scale image sets acquired by automated microscopy of perturbed samples enable a detailed comparison of cell states induced by each perturbation, such as a small molecule from a diverse library. Highly multiplexed measurements of cellular morphology can be extracted from each image and subsequently mined for a number of applications. Findings: This microscopy data set includes 919,874 five-channel fields of view representing 30,616 tested compounds, available at 'The Cell Image Library' repository...
January 7, 2017: GigaScience
https://www.readbyqxmd.com/read/28315055/determination-of-heavy-metals-in-muscle-tissue-of-six-fish-species-with-different-feeding-habits-from-the-danube-river-belgrade-public-health-and-environmental-risk-assessment
#4
Dragoljub A Jovanović, Radmila V Marković, Vlado B Teodorović, Dragan S Šefer, Milena P Krstić, Stamen B Radulović, Jelena S Ivanović Ćirić, Jelena M Janjić, Milan Ž Baltić
The aim of this study was to investigate the presence of heavy metals/metalloids (Pb, Cd, Hg, Cu, Fe, Zn, As) in the muscle tissue of fish from the Danube River (two locations: Zemun and Grocka). For the purpose of heavy metal determination in fish muscle, 120 samples of six different fish species, Prussian carp, barbel, bream, carp, pike perch, and catfish were collected. For determining heavy metals, we used microwave oven digestion and atomic absorption spectrometer methods. The highest average content of Pb (0...
March 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28293748/assessing-trace-metal-contamination-and-organic-matter-in-the-brackish-lakes-as-the-major-source-of-potable-water
#5
Vlado Cuculić, Neven Cukrov, Željko Kwokal, Slađana Strmečki, Marta Plavšić
On small and medium karstic coastal islands in the Adriatic Sea, brackish lakes are often the only source of freshwater. Therefore, it is important to adequately evaluate the biogeochemical processes occurring in these complex water systems, as well as to determine the origin of contaminants present. In this study, the distribution and origin of trace metals (Tl, Hg, Cd, Pb, Cu, Zn, Ni, Co) and organic matter in the water column, sediment, and surrounding soil of the brackish lakes on Mljet Island, South Adriatic Sea, Croatia, were evaluated...
March 14, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28274703/spines-of-the-porcupine-fish-structure-composition-and-mechanical-properties
#6
Frances Y Su, Eric A Bushong, Thomas J Deerinck, Kyungah Seo, Steven Herrera, Olivia A Graeve, David Kisailus, Vlado A Lubarda, Joanna McKittrick
This paper explores the structure, composition, and mechanical properties of porcupine fish spines for the first time. The spine was found to be composed of nanocrystalline hydroxyapatite, protein (collagen), and water using X-ray diffraction, energy-dispersive X-ray spectroscopy, and thermogravimetric analysis. Microstructures have mineralized fibrillar sheets in the longitudinal direction and in a radial orientation in the transverse direction that were observed using light and electron microscopy. Based on the images, the hierarchical structure of the spine shows both concentric and radial reinforcement...
February 28, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28244644/optimizing-the-analysis-strategy-for-the-canvas-program-a-prespecified-plan-for-the-integrated-analyses-of-the-canvas-and-canvas-r-trials
#7
Bruce Neal, Vlado Perkovic, Kenneth W Mahaffey, Greg Fulcher, Ngozi Erondu, Mehul Desai, Wayne Shaw, Gordon Law, Marc K Walton, Norm Rosenthal, Dick de Zeeuw, David R Matthews
Two large cardiovascular outcome trials of canagliflozin, comprising the CANVAS Program, will complete in early 2017: the CANagliflozin cardioVascular Assessment Study (CANVAS) and the CANagliflozin cardioVascular Assessment Study-Renal (CANVAS-R). Accruing data for the sodium glucose co-transporter 2 (SGLT2) inhibitor class has identified questions and opportunities that were not apparent when the trials were designed. Accordingly, a series of modifications have been made to the planned analyses. These updates will ensure that the data from the CANVAS Program will maximize advances in scientific knowledge and patient care...
February 28, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/28238223/glucose-lowering-agents-for-treating-pre-existing-and-new-onset-diabetes-in-kidney-transplant-recipients
#8
REVIEW
Clement Lo, Min Jun, Sunil V Badve, Helen Pilmore, Sarah L White, Carmel Hawley, Alan Cass, Vlado Perkovic, Sophia Zoungas
BACKGROUND: Kidney transplantation is the preferred form of kidney replacement therapy for patients with end-stage kidney disease (ESKD) and is often complicated by worsening or new-onset diabetes. Management of hyperglycaemia is important to reduce post-transplant and diabetes-related complications. The safety and efficacy of glucose-lowering agents after kidney transplantation is largely unknown. OBJECTIVES: To evaluate the efficacy and safety of pharmacological interventions for lowering glucose levels in patients who have undergone kidney transplantation and have diabetes...
February 27, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28169881/side-effects-and-tolerability-of-combination-blood-pressure-lowering-according-to-blood-pressure-levels-an-analysis-of-the-perindopril-protection-against-recurrent-stroke-study-and-action-in-diabetes-and-vascular-disease-preterax-and-diamicron-mr-controlled
#9
Emily R Atkins, Yoichiro Hirakawa, Abdul Salam, Mark Woodward, Mark Cooper, Pavel Hamet, Stephen Harrap, Kennedy Lees, Lisheng Liu, Giuseppe Mancia, Michel Marre, Vlado Perkovic, Neil Poulter, Bryan Williams, John Chalmers, Anthony Rodgers
OBJECTIVE: To measure the placebo-controlled effects of combination therapy on hypotension, treatment discontinuation, and major renal outcomes, according to baseline blood pressure. METHODS: We conducted an analysis of the action in diabetes and vascular disease: preterax and diamicron-MR controlled evaluation and perindopril protection against recurrent stroke study trials, including 14 684 participants allocated combination therapy or placebo. The mean age was 65 years, 61% were men, and 64% were receiving background blood pressure lowering (BPL) therapy...
February 6, 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28151412/a-trial-of-extending-hemodialysis-hours-and-quality-of-life
#10
Meg J Jardine, Li Zuo, Nicholas A Gray, Janak R de Zoysa, Christopher T Chan, Martin P Gallagher, Helen Monaghan, Stuart M Grieve, Rajesh Puranik, Hongli Lin, Josette M Eris, Ling Zhang, Jinsheng Xu, Kirsten Howard, Serigne Lo, Alan Cass, Vlado Perkovic
The relationship between increased hemodialysis hours and patient outcomes remains unclear. We randomized (1:1) 200 adult recipients of standard maintenance hemodialysis from in-center and home-based hemodialysis programs to extended weekly (≥24 hours) or standard (target 12-15 hours, maximum 18 hours) hemodialysis hours for 12 months. The primary outcome was change in quality of life from baseline assessed by the EuroQol 5 dimension instrument (3 level) (EQ-5D). Secondary outcomes included medication usage, clinical laboratory values, vascular access events, and change in left ventricular mass index...
February 1, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28120497/rationale-design-and-baseline-characteristics-of-the-canagliflozin-cardiovascular-assessment-study-renal-canvas-r-a-randomized-placebo-controlled-trial
#11
Bruce Neal, Vlado Perkovic, David R Matthews, Kenneth W Mahaffey, Greg Fulcher, Gary Meininger, Ngozi Erondu, Mehul Desai, Wayne Shaw, Frank Vercruysse, Jacqueline Yee, Hsiaowei Deng, Dick de Zeeuw
AIMS: The primary aim of the CANagliflozin cardioVascular Assessment Study-Renal (CANVAS-R) is to determine whether the favourable effects of inhibition of the sodium glucose co-transporter 2 (SGLT2) on blood glucose, blood pressure and body weight are accompanied by protection against adverse renal outcomes. MATERIALS AND METHODS: CANVAS-R is a prospective, randomized, double-blind, placebo-controlled trial in patients with type 2 diabetes with a history or high risk of cardiovascular events...
March 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/28118112/development-of-a-novel-murine-model-of-combined-radiation-and-peripheral-tissue-trauma-injuries
#12
Vlado Antonic, Isabel L Jackson, Gurung Ganga, Terez Shea-Donohue, Zeljko Vujaskovic
Detonation of a 10-kiloton nuclear bomb in an urban setting would result in >1 million casualties, the majority of which would present with combined injuries. Combined injuries, such as peripheral tissue trauma and radiation exposure, trigger inflammatory events that lead to multiple organ dysfunction (MOD) and death, with gastrointestinal (GI) and pulmonary involvement playing crucial roles. The objective of this study was to develop an animal model of combined injuries, peripheral tissue trauma (TBX animal model) combined with total body irradiation with 5% bone marrow shielding (TBI/BM5) to investigate if peripheral tissue trauma contributes to reduced survival...
February 2017: Radiation Research
https://www.readbyqxmd.com/read/28108364/from-natalizumab-to-fingolimod-in-eight-weeks-immunological-clinical-and-radiological-data-in-quest-of-the-optimal-switch
#13
Andrea Harrer, Georg Pilz, Katrin Oppermann, Marlene Sageder, Shahrzad Afazel, Elisabeth Haschke-Becher, Theo Rispens, Annick de Vries, Mark McCoy, Vlado Stevanovic, Wolfgang Hitzl, Eugen Trinka, Jörg Kraus, Johann Sellner, Peter Wipfler
Natalizumab (NZB) discontinuation during a treatment change is associated with recurrence of disease activity in a significant proportion of multiple sclerosis (MS) patients. The immunological basis why disease reactivation occurs in selected patients is unresolved. In search of a prognostic biomarker for a safe and effective transition from NZB to fingolimod, we monitored five parameters related to pharmacokinetic and pharmacodynamic effects of the two drugs in 12 MS patients until six months on fingolimod...
March 2017: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/28069513/structure-and-mechanical-implications-of-the-pectoral-fin-skeleton-in-the-longnose-skate-chondrichthyes-batoidea
#14
Wei Huang, Watcharapong Hongjamrassilp, Jae-Young Jung, Philip A Hastings, Vlado A Lubarda, Joanna McKittrick
Animal propulsion systems are believed to show high energy and mechanical efficiency in assisting movement compared to artificial designs. As an example, batoid fishes have very light cartilaginous skeletons that facilitate their elegant swimming via enlarged wing-like pectoral fins. The aim of this work is to illustrate the hierarchical structure of the pectoral fin of a representative batoid, the Longnose Skate (Raja rhina), and explain the mechanical implications of its structural design. At the macro level, the pectoral fins are comprised of radially oriented fin rays, formed by staggered mineralized skeletal elements stacked end-to-end...
January 6, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28019071/the-effects-of-atrasentan-on-urinary-metabolites-in-patients-with-type-2-diabetes-and-nephropathy
#15
Michelle J Pena, Dick de Zeeuw, Dennis Andress, John J Brennan, Ricardo Correa-Rotter, Blai Coll, Donald E Kohan, Hirofumi Makino, Vlado Perkovic, Giuseppe Remuzzi, Sheldon W Tobe, Robert Toto, Hans-Henrik Parving, Shoba Sharma, Tom Corringham, Kumar Sharma, Hiddo J L Heerspink
We assessed the effect of atrasentan therapy on a pre-specified panel of 13 urinary metabolites known to reflect mitochondrial function in patients with diabetic kidney disease. This post-hoc analysis was performed using urine samples collected during the RADAR study which was a randomized, double-blind, placebo-controlled trial that tested the effects of atrasentan on albuminuria reduction in patients with type 2 diabetes and nephropathy. At baseline, 4 of the 13 metabolites, quantified by gas-chromatography mass spectrometry, were below detectable levels, and 6 were reduced in patients with eGFR < 60 mL/min/1...
December 25, 2016: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/27998624/warfarin-initiation-atrial-fibrillation-and-kidney-function-%C3%A2-comparative-effectiveness-and-safety-of%C3%A2-warfarin%C3%A2-in%C3%A2-older%C3%A2-adults%C3%A2-with-newly-diagnosed-atrial%C3%A2-fibrillation
#16
Min Jun, Matthew T James, Zhihai Ma, Jianguo Zhang, Marcello Tonelli, Finlay A McAlister, Braden J Manns, Pietro Ravani, Robert R Quinn, Natasha Wiebe, Vlado Perkovic, Stephen B Wilton, Wolfgang C Winkelmayer, Brenda R Hemmelgarn
BACKGROUND: The effectiveness and safety of warfarin use among patients with atrial fibrillation (AF) and reduced kidney function are uncertain. STUDY DESIGN: Community-based retrospective cohort study (May 1, 2003, to March 31, 2012) using province-wide laboratory and administrative data in Alberta, Canada. SETTING & PARTICIPANTS: 14,892 adults 66 years or older with new AF and a measurement of kidney function. Long-term dialysis patients or kidney transplant recipients were excluded...
December 17, 2016: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/27992927/review-revascularization-and-medical-treatment-may-be-similar-in-atherosclerotic-renal-artery-stenosis
#17
Vlado Perkovic
No abstract text is available yet for this article.
December 20, 2016: Annals of Internal Medicine
https://www.readbyqxmd.com/read/27981738/comparison-of-exposure-response-relationship-of-atrasentan-between-north-american-and-asian-populations
#18
Hiddo J L Heerspink, Hirofumi Makino, Dennis Andress, John J Brennan, Ricardo Correa-Rotter, Blai Coll, Justin W Davis, Ken Idler, Donald E Kohan, Mohan Liu, Vlado Perkovic, Giuseppe Remuzzi, Sheldon W Tobe, Robert Toto, Hans-Henrik Parving, Dick de Zeeuw
AIMS: The selective endothelin (ET) A receptor antagonist atrasentan has been shown to lower albuminuria in North American and Asian patients with type 2 diabetes and nephropathy. As drug responses to many drugs may differ between North American and Asian populations, we assessed the influence of geographical region on the albuminuria and fluid retention response to atrasentan. MATERIALS AND METHODS: Two 12-week double-blind randomised controlled trials were performed with atrasentan 0...
December 15, 2016: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/27904416/adsorption-characteristics-of-different-adsorbents-and-iron-iii-salt-for-removing-as-v-from-water
#19
Josip Ćurko, Marin Matošić, Vlado Crnek, Višnja Stulić, Ivan Mijatović
The aim of this study is to determine the adsorption performance of three types of adsorbents for removal of As(V) from water: Bayoxide(®) E33 (granular iron(III) oxide), Titansorb(®) (granular titanium oxide) and a suspension of precipitated iron(III) hydroxide. Results of As(V) adsorption stoichiometry of two commercial adsorbents and precipitated iron(III) hydroxide in tap and demineralized water were fitted to Freundlich and Langmuir adsorption isotherm equations, from which adsorption constants and adsorption capacity were calculated...
June 2016: Food Technology and Biotechnology
https://www.readbyqxmd.com/read/27884312/management-of-patients-with-diabetes-and-ckd-%C3%A2-conclusions-from-a-kidney-disease-improving-global-outcomes-kdigo-controversies-conference
#20
Vlado Perkovic, Rajiv Agarwal, Paola Fioretto, Brenda R Hemmelgarn, Adeera Levin, Merlin C Thomas, Christoph Wanner, Bertram L Kasiske, David C Wheeler, Per-Henrik Groop
The prevalence of diabetes around the world has reached epidemic proportions and is projected to increase to 642 million people by 2040. Diabetes is already the leading cause of end-stage kidney disease (ESKD) in most developed countries, and the growth in the number of people with ESKD around the world parallels the increase in diabetes. The presence of kidney disease is associated with a markedly elevated risk of cardiovascular disease and death in people with diabetes. Several new therapies and novel investigational agents targeting chronic kidney disease patients with diabetes are now under development...
December 2016: Kidney International
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