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https://www.readbyqxmd.com/read/28807799/the-influence-of-yttrium-segregation-dependent-phase-partitioning-and-residual-stresses-on-the-aging-and-fracture-behaviour-of-3y-tzp-ceramics
#1
Dušan Bučevac, Tomaž Kosmač, Andraž Kocjan
The yttrium-segregation-dependent phase partitioning and residual stress development that influence both the aging and the fracture behaviour in 3Y-TZP bioceramics were studied by sintering alumina-free 3Y-TZP, varying the sintering temperature and the time, to yield ceramics with identical grain size distributions, but with different phase compositions. The structure and stability of the resulting tetragonal phases, in the form of transformable, yttria-lean t-ZrO2 (YLZ) and non-transformable, yttria-rich t"-ZrO2 and/or t'-ZrO2 (YRZ), were studied by X-ray diffraction (XRD) and focused ion beam scanning electron microscopy (FIB-SEM)...
August 11, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28797948/a-scanning-probe-mounted-on-a-field-effect-transistor-characterization-of-ion-damage-in-si
#2
Kumjae Shin, Hoontaek Lee, Min Sung, Sang Hoon Lee, Hyunjung Shin, Wonkyu Moon
We have examined the capabilities of a Tip-On-Gate of Field-Effect Transistor (ToGoFET) probe for characterization of FIB-induced damage in Si surface. A ToGoFET probe is the SPM probe which the Field Effect Transistor(FET) is embedded at the end of a cantilever and a Pt tip was mounted at the gate of FET. The ToGoFET probe can detect the surface electrical properties by measuring source-drain current directly modulated by the charge on the tip. In this study, a Si specimen whose surface was processed with Ga+ ion beam was prepared...
July 24, 2017: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/28772763/a-comparison-of-microscale-techniques-for-determining-fracture-toughness-of-limn%C3%A2-o%C3%A2-particles
#3
Muhammad Zeeshan Mughal, Hugues-Yanis Amanieu, Riccardo Moscatelli, Marco Sebastiani
Accurate estimation of fracture behavior of commercial LiMn₂O₄ particles is of great importance to predict the performance and lifetime of a battery. The present study compares two different microscale techniques to quantify the fracture toughness of LiMn₂O₄ particles embedded in an epoxy matrix. The first technique uses focused ion beam (FIB) milled micro pillars that are subsequently tested using the nanoindentation technique. The pillar geometry, critical load at pillar failure, and cohesive FEM simulations are then used to compute the fracture toughness...
April 12, 2017: Materials
https://www.readbyqxmd.com/read/28768482/comparative-genomic-analysis-and-characterization-of-incompatibility-group-fib-plasmid-encoded-virulence-factors-of-salmonella-enterica-isolated-from-food-sources
#4
Bijay K Khajanchi, Nur A Hasan, Seon Young Choi, Jing Han, Shaohua Zhao, Rita R Colwell, Carl E Cerniglia, Steven L Foley
BACKGROUND: The degree to which the chromosomal mediated iron acquisition system contributes to virulence of many bacterial pathogens is well defined. However, the functional roles of plasmid encoded iron acquisition systems, specifically Sit and aerobactin, have yet to be determined for Salmonella spp. In a recent study, Salmonella enterica strains isolated from different food sources were sequenced on the Illumina MiSeq platform and found to harbor the incompatibility group (Inc) FIB plasmid...
August 2, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28765691/fibrinogen-deficiency-suppresses-the-development-of-early-and-delayed-radiation-enteropathy
#5
Junru Wang, Rupak Pathak, Sarita Garg, Martin Hauer-Jensen
AIM: To determine the mechanistic role of fibrinogen, a key regulator of inflammation and fibrosis, in early and delayed radiation enteropathy. METHODS: Fibrinogen wild-type (Fib(+/+)), fibrinogen heterozygous (Fib(+/-)), and fibrinogen knockout (Fib(-/-)) mice were exposed to localized intestinal irradiation and assessed for early and delayed structural changes in the intestinal tissue. A 5-cm segment of ileum of mice was exteriorized and exposed to 18.5 Gy of x-irradiation...
July 14, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28759595/hbv-infection-in-untreated-hiv-infected-adults-in-maputo-mozambique
#6
Lúcia Mabalane Chambal, Eduardo Samo Gudo, Awa Carimo, Rita Corte Real, Nédio Mabunda, Cremildo Maueia, Adolfo Vubil, Ana Flora Zicai, Nilesh Bhatt, Francisco Antunes
BACKGROUND: HIV/ HBV coinfected patients are at high risk of developing chronic HBV infection, liver cirrhosis and hepatocellular carcinoma. In Mozambique, where HIV prevalence is one of the highest in the world, HIV-infected patients are scarcely characterized in terms of HBV coinfection and 3TC-resistance mutations profile. METHODS: To characterize ART-naïve HIV-infected adults, with and without HBV coinfection, a cross-sectional study was conducted between May and November 2012 in two health centers from Maputo city, Mozambique...
2017: PloS One
https://www.readbyqxmd.com/read/28753012/identification-of-urinary-food-intake-biomarkers-for-milk-cheese-and-soy-based-drink-by-untargeted-gc-ms-and-nmr-in-healthy-humans
#7
Linda H Münger, Alessia Trimigno, Gianfranco Picone, Carola Freiburghaus, Grégory Pimentel, Kathryn J Burton, François P Pralong, Nathalie Vionnet, Francesco Capozzi, René Badertscher, Guy Vergères
The measurement of food intake biomarkers (FIBs) in biofluids represents an objective tool for dietary assessment. FIBs of milk and cheese still need more investigation due to the absence of candidate markers. Thus, an acute intervention study has been performed to sensitively and specifically identify candidate FIBs. Eleven healthy male and female volunteers participated in the randomised, controlled crossover study that tested a single intake of milk and cheese as test products, and soy based drink as a control...
July 28, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/28752524/serial-combination-of-non-invasive-tools-improves-the-diagnostic-accuracy-of-severe-liver-fibrosis-in-patients-with-nafld
#8
S Petta, V W-S Wong, C Cammà, J-B Hiriart, G L-H Wong, J Vergniol, A W-H Chan, V Di Marco, W Merrouche, H L-Y Chan, F Marra, B Le-Bail, U Arena, A Craxì, V de Ledinghen
BACKGROUND: The accuracy of available non-invasive tools for staging severe fibrosis in patients with nonalcoholic fatty liver disease (NAFLD) is still limited. AIM: To assess the diagnostic performance of paired or serial combination of non-invasive tools in NAFLD patients. METHODS: We analysed data from 741 patients with a histological diagnosis of NAFLD. The GGT/PLT, APRI, AST/ALT, BARD, FIB-4, and NAFLD Fibrosis Score (NFS) scores were calculated according to published algorithms...
July 27, 2017: Alimentary Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/28745782/effects-of-heparin-catheter-sealing-solution-for-implantable-venous-access-ports-on-d-dimer-levels-in-older-cancer-patients
#9
X-M Gao, R He, J-F Guan, L Tian
OBJECTIVE: To investigate the effects of different concentrations of heparin catheter-sealing solution for implantable venous access ports (VAPs) on D-dimers (D-D) in older cancer patients. PATIENTS AND METHODS: A total of 208 older cancer patients who received intravenous chemotherapy for the first time were randomly divided into four groups: the normal saline group, the low concentration heparin group (25 U/ml), the medium concentration heparin group (50 U/ml), and the high concentration heparin group (75 U/ml), with 52 patients in each group...
July 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28735336/acoustic-radiation-force-impulse-arfi-elastography-and-serological-markers-in-assessment-of-liver-fibrosis-and-free-portal-pressure-in-patients-with-hepatitis-b
#10
Jun Li, Jie Yu, Xin-Yu Peng, Ting-Ting Du, Jia-Jia Wang, Jin Tong, Gui-Lin Lu, Xiang-Wei Wu
BACKGROUND The aim of this study was to investigate the feasibility of using acoustic radiation force impulse (ARFI) elastography, AST-to-platelet ratio index (APRI), and FIB-4 in assessing liver fibrosis and free portal pressure in patients with hepatitis B. MATERIAL AND METHODS We enrolled 126 patients with hepatitis B who underwent liver surgery at the General Surgery Department of the First Affiliated Hospital of Shihezi University Medical School from February 2013 to August 2015. Preoperatively, shear wave velocity (SWV) of the liver was measured with the Siemens S2000 ultrasound system to reflect liver stiffness...
July 23, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28708426/phenotypic-characteristics-and-genetic-diversity-of-salmonella-enterica-serotype-derby-isolated-from-human-patients-and-foods-of-animal-origin
#11
Chenggang Xu, Xingxing Ren, Zhou Feng, Ying Fu, Yanfen Hong, Zujie Shen, Lina Zhang, Ming Liao, Xuebin Xu, Jianmin Zhang
Salmonella enterica serotype Derby is among the three most common serotypes of nontyphoidal Salmonella isolated from patients with diarrhea in China. In this study, 133 Salmonella Derby isolates from human patients (n = 74) and foods of animal origin (n = 59) in Shanghai, China, between September 2013 and December 2014, were selected to study its phenotypic characteristics and genetic diversity. The isolates were subjected to antimicrobial susceptibility testing, plasmid replicon typing, virulence profile determination, and molecular subtyping by pulsed-field gel electrophoresis (PFGE)...
July 14, 2017: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/28696351/nanoporous-structure-formation-in-gasb-insb-and-ge-by-ion-beam-irradiation-under-controlled-point-defect-creation-conditions
#12
Yusuke Yanagida, Tomoya Oishi, Takashi Miyaji, Chiaki Watanabe, Noriko Nitta
Ion beam irradiation-induced nanoporous structure formation was investigated on GaSb, InSb, and Ge surfaces via controlled point defect creation using a focused ion beam (FIB). ‎This paper compares the nanoporous structure formation under the same extent of point defect creation while changing the accelerating voltage and ion dose. Although the same number of point defects were created in each case, different structures were formed on the different surfaces. The depth direction density of the point defects was an important factor in this trend...
July 11, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28693326/multiscale-morphology-of-nanoporous-copper-made-from-intermetallic-phases
#13
Tobias Egle, Cédric Barroo, Nare Janvelyan, Andreas C Baumgaertel, Austin J Akey, Monika M Biener, Cynthia M Friend, David C Bell, Juergen Biener
Many application-relevant properties of nanoporous metals critically depend on their multiscale architecture. For example, the intrinsically high step-edge density of curved surfaces at the nanoscale provides highly reactive sites for catalysis, whereas the macroscale pore and grain morphology determines the macroscopic properties, such as mass transport, electrical conductivity, or mechanical properties. In this work, we systematically study the effects of alloy composition and dealloying conditions on the multiscale morphology of nanoporous copper (np-Cu) made from various commercial Zn-Cu precursor alloys...
July 19, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28692443/a-single-test-combining-blood-markers-and-elastography-is-more-accurate-than-other-fibrosis-tests-in-the-main-causes-of-chronic-liver-diseases
#14
Alexandra Ducancelle, Vincent Leroy, Julien Vergniol, Nathalie Sturm, Brigitte Le Bail, Jean Pierre Zarski, Eric Nguyen Khac, Dominique Salmon, Victor de Ledinghen, Paul Calès
BACKGROUND AND GOAL: International guidelines suggest combining a blood test and liver stiffness measurement (LSM) to stage liver fibrosis in chronic hepatitis C (CHC) and non-alcoholic fatty liver disease (NAFLD). Therefore, we compared the accuracies of these tests between the main etiologies of chronic liver diseases. STUDY: Overall, 1968 patients were included in 5 etiologies: CHC: 698, chronic hepatitis B: 152, human immunodeficiency virus/CHC: 628, NAFLD: 225, and alcoholic liver disease (ALD): 265...
August 2017: Journal of Clinical Gastroenterology
https://www.readbyqxmd.com/read/28692287/quantifying-the-structure-and-composition-of-flocculated-suspended-particulate-matter-using-focused-ion-beam-nanotomography
#15
Jonathan A T Wheatland, Andrew J Bushby, Kate L Spencer
Suspended particulate matter (SPM) is present in the natural aquatic environment as loosely bound aggregates or "flocs" and is responsible for the transport and fate of sediment, carbon, nutrients, pollutants, pathogens and manufactured nanoparticles from catchment to coast. Accurate prediction of SPM hydrodynamics requires the quantification of 3D floc properties (size, shape, density and porosity) that span several spatial scales. Yet, current techniques (video camera systems, optical microscopy and transmission electron microscopy, TEM) can only provide 2D simplifications of size and shape with a spatial resolution gap between the "gross" (>100s μm) and nanoscale (<1 μm)...
July 24, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28691926/low-temperature-solid-state-wetting-and-formation-of-nanowelds-in-silver-nanowires
#16
Vuk V Radmilovic, Manuela Göbelt, Colin Ophus, Silke H Christiansen, Erdmann Spiecker, Velimir R Radmilovic
This article focuses on the microscopic mechanism of thermally induced nanoweld formation between silver nanowires (AgNWs) which is a key process for improving electrical conductivity in NW networks employed for transparent electrodes. Focused ion beam (FIB) sectioning and transmission electron microscopy (TEM) were applied in order to elucidate the atomic structure of welded NW including measurement of the wetting contact angle and characterization of defect structure with atomic accuracy, which provides fundamental information on the welding mechanism...
July 10, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28682889/femoral-nerve-block-versus-fascia-iliaca-block-for-pain-control-in-total-knee-and-hip-arthroplasty-a-meta-analysis-from-randomized-controlled-trials
#17
REVIEW
Xin Wang, Yuan Sun, Li Wang, Xuelian Hao
BACKGROUND: This meta-analysis aimed to perform a meta-analysis to compare the efficiency and safety between femoral nerve block (FNB) and fascia iliaca block (FIB) for postoperative pain control in patients undergoing total knee and hip arthroplasties. METHODS: A systematic search was performed in Medline (1966-2017.05), PubMed (1966-2017.05), Embase (1980-2017.05), ScienceDirect (1985-2017.05) and the Cochrane Library. Inclusion criteria (1) Participants: Only published articles enrolling adult participants that with a diagnosis of end-stage of osteoarthritis and prepared for unilateral TKA or THA; (2) Interventions: The intervention group received FIB for postoperative pain management; (3) Comparisons: The control group was received FNB for postoperative pain control; (4) Outcomes: Visual analogue scale (VAS) scores in different periods, opioids consumption, length of stay and postoperative complications; (5) Study design: clinical randomized control trials (RCTs) were regarded as eligible in our study...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28682058/revealing-the-cell-material-interface-with-nanometer-resolution-by-focused-ion-beam-scanning-electron-microscopy
#18
Francesca Santoro, Wenting Zhao, Lydia-Marie Joubert, Liting Duan, Jan Schnitker, Yoeri van de Burgt, Hsin-Ya Lou, Bofei Liu, Alberto Salleo, Lifeng Cui, Yi Cui, Bianxiao Cui
The interface between cells and nonbiological surfaces regulates cell attachment, chronic tissue responses, and ultimately the success of medical implants or biosensors. Clinical and laboratory studies show that topological features of the surface profoundly influence cellular responses; for example, titanium surfaces with nano- and microtopographical structures enhance osteoblast attachment and host-implant integration as compared to a smooth surface. To understand how cells and tissues respond to different topographical features, it is of critical importance to directly visualize the cell-material interface at the relevant nanometer length scale...
July 21, 2017: ACS Nano
https://www.readbyqxmd.com/read/28658094/multimorbidity-and-polypharmacy-in-diabetic-patients-with-nafld-implications-for-disease-severity-and-management
#19
Preya Janubhai Patel, Kelly Lee Hayward, Rathiga Rudra, Leigh Ula Horsfall, Fabrina Hossain, Suzanne Williams, Tracey Johnson, Nigel Neil Brown, Nivene Saad, Andrew Donald Clouston, Katherine Anne Stuart, Patricia Casarolli Valery, Katharine Margaret Irvine, Anthony William Russell, Elizabeth Ellen Powell
An observational study describing the number and type of chronic conditions and medications taken by diabetic patients with NAFLD and identifying characteristics that may impact liver disease severity or clinical management.Adults with type 2 diabetes have a high prevalence of nonalcoholic fatty liver disease (NAFLD) and increased risk of developing advanced liver disease. Appropriate management should consider the characteristics of the diabetic NAFLD population, as comorbid conditions and medications may increase the complexity of treatment strategies...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28650402/hiv-hbv-co-infection-is-a-significant-risk-factor-for-liver-fibrosis-in-tanzanian-hiv-infected-adults
#20
Claudia Hawkins, Beatrice Christian, Emanuel Fabian, Irene Macha, Cecilia Gawile, Shida Mpangala, Nzovu Ulenga, Chloe L Thio, Lauren Rose Ammerman, Ferdinand Mugusi, Wafaie Fawzi, Richard Green, Robert Murphy
BACKGROUND: In sub-Saharan Africa, the burden of liver disease associated with chronic hepatitis B (HBV) and HIV is unknown. We characterized liver disease using aspartate aminotransferase-to-platelet ratio index (APRI) and FIB-4 in patients with HIV, HBV, and HIV/HBV co-infection in Tanzania. METHODS: Using a cross sectional design, we compared the prevalence of liver fibrosis in treatment-naive HIV mono-infected, HBV mono-infected, and HIV/HBV co-infected adults enrolled at Management and Development for Health (MDH)-supported HIV treatment clinics in Dar es Salaam, Tanzania...
June 22, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
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