keyword
MENU ▼
Read by QxMD icon Read
search

X-Ray

keyword
https://www.readbyqxmd.com/read/28340529/effects-of-rapid-thermal-annealing-and-different-oxidants-on-the-properties-of-laxalyo-nanolaminate-films-deposited-by-atomic-layer-deposition
#1
Chenxi Fei, Hongxia Liu, Xing Wang, Lu Zhao, Dongdong Zhao, Xingyao Feng
A comparative study of different sequences of two metal precursors [trimethylaluminum (TMA) and Tris(isopropylcyclopentadienyl) lanthanum (La((i)PrCp)3)] for atomic layer deposition (ALD) lanthanum aluminum oxide (LaxAlyO) films is carried out. The percentage compositions of C and N impurity of LaxAlyO films were investigated using in situ X-ray photoelectron spectroscopy (XPS). The effects of different oxidants on the physical and chemical properties and electrical characteristics of LaxAlyO films are studied before and after annealing...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28340521/stable-and-controllable-synthesis-of-silver-nanowires-for-transparent-conducting-film
#2
Bitao Liu, Hengqing Yan, Shanyong Chen, Youwei Guan, Guoguo Wu, Rong Jin, Lu Li
Silver nanowires without particles are synthesized by a solvothermal method at temperature 150 °C. Silver nanowires are prepared via a reducing agent of glycerol and a capping agent of polyvinylpyrrolidone (M w  ≈ 1,300,000). Both of them can improve the purity of the as-prepared silver nanowires. With controllable shapes and sizes, silver nanowires are grown continuously up to 10-20 μm in length with 40-50 nm in diameter. To improve the yield of silver nanowires, the different concentrations of AgNO3 synthesis silver nanowires are discussed...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28340456/macroscopic-and-microscopic-investigation-of-adsorption-and-precipitation-of-zn-on-%C3%AE-alumina-in-the-absence-and-presence-of-as
#3
Yu-Jun Wang, Ting-Ting Fan, Cun Liu, Wei Li, Meng-Qiang Zhu, Jian-Xin Fan, Hua Gong, Dong-Mei Zhou, Donald L Sparks
Contaminants zinc (Zn) and arsenate (As) often coexist in soils. However, little is known concerning the impacts of coexisting As on Zn adsorption and precipitation on soil minerals. In the present study, adsorption and precipitation of Zn on γ-alumina in the absence and presence of arsenate was investigated employing batch experiments and Extended X-ray Absorption Fine Structure (EXAFS) spectroscopy. Results indicated that Zn formed edge-sharing tetrahedral surface complexes at pH 5.5 and Zn-Al LDH-like (layered double hydroxide) precipitates at pH 7...
March 21, 2017: Chemosphere
https://www.readbyqxmd.com/read/28340368/synthesis-molecular-docking-antimycobacterial-and-antimicrobial-evaluation-of-new-pyrrolo-3-2-c-pyridine-mannich-bases
#4
Gilish Jose, Tholappanavara H Suresha Kumara, Haliwana B V Sowmya, Dharmarajan Sriram, Tayur N Guru Row, Amar A Hosamani, Sunil S More, Bhavya Janardhan, B G Harish, Sandeep Telkar, Yalegara Siddappa Ravikumar
In this report, we describe the synthesis and biological evaluation of a new series of pyrrolo[3,2-c]pyridine Mannich bases (7a-v). The Mannich bases were obtained in good yields by one-pot three component condensation of pyrrolo[3,2-c]pyridine scaffold (6a-c) with secondary amines and excess of formaldehyde solution in AcOH. The chemical structures of the compounds were characterized by (1)H NMR, (13)C NMR, LC/MS and elemental analysis. Single crystal X-ray diffraction has been recorded for compound 7k ([C23H29ClN4](+2), H2O)...
March 16, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28340337/structural-basis-of-rna-polymerase-i-transcription-initiation
#5
Christoph Engel, Tobias Gubbey, Simon Neyer, Sarah Sainsbury, Christiane Oberthuer, Carlo Baejen, Carrie Bernecky, Patrick Cramer
Transcription initiation at the ribosomal RNA promoter requires RNA polymerase (Pol) I and the initiation factors Rrn3 and core factor (CF). Here, we combine X-ray crystallography and cryo-electron microscopy (cryo-EM) to obtain a molecular model for basal Pol I initiation. The three-subunit CF binds upstream promoter DNA, docks to the Pol I-Rrn3 complex, and loads DNA into the expanded active center cleft of the polymerase. DNA unwinding between the Pol I protrusion and clamp domains enables cleft contraction, resulting in an active Pol I conformation and RNA synthesis...
March 23, 2017: Cell
https://www.readbyqxmd.com/read/28340311/early-clinical-efficacy-comparison-study-of-gamma3-nail-percutaneous-compression-plate-pccp-and-femoral-head-replacement-fhr-treatment-on-senile-unstable-intertrochanteric-fractures
#6
Shaofeng Yang, Yanan Liu, Tongqi Yang, Jun Zou, Huilin Yang
PURPOSE: This study aimed to analyze the early clinical efficacy of Gamma 3 nail, percutaneous compression plate (PCCP) and femoral head replacement (FHR) treatments on senile unstable intertrochanteric fractures. MATERIALS AND METHODS: Totally 116 patients were included to perform an retrospective study, which involved analysis of the operation time, intraoperative blood loss, and hemoglobin reduction on the first postoperative day compared with preoperative levels, fracture gap, neck shaft angle and tip apex distance on the first postoperative X-ray, hospital stay, time from surgery to mobilization, Harris hip scores and Barthel index six months after operation, and complications postoperative meanwhile were evaluated respectively among three groups...
February 10, 2017: Journal of Investigative Surgery: the Official Journal of the Academy of Surgical Research
https://www.readbyqxmd.com/read/28340308/a-preliminary-investigation-on-the-effect-of-extracorporeal-shock-wave-therapy-as-a-treatment-for-neurogenic-heterotopic-ossification-following-traumatic-brain-injury-part-i-effects-on-pain
#7
J E Reznik, E Biros, A C Lamont, Y Sacher, O Kibrik, S Milanese, S Gordon, M P Galea
INTRODUCTION: Neurogenic heterotopic ossification (NHO) is a complication of a neurological injury following traumatic brain injury (TBI) and may be present around major synovial joints. It is often accompanied by severe pain, which may lead to limitation in activities of daily living. Currently, a common intervention for NHO is surgery, which has been reported to carry many additional risks. This study was designed to assess the effect of extracorporeal shock wave therapy (ESWT) on pain in patients with TBI with chronic NHO...
March 24, 2017: Brain Injury: [BI]
https://www.readbyqxmd.com/read/28340297/atomic-scale-snapshots-of-the-formation-and-growth-of-hollow-ptni-c-nanocatalysts
#8
Raphael Chattot, Tristan Asset, Jakub Drnec, Pierre Bordet, Jaysen Nelayah, Laetitia Dubau, Frédéric Maillard
Determining the formation and growth mechanism of bimetallic nanoparticles (NPs) with atomic detail is fundamental to synthesize efficient 'catalysts by design'. However, the understanding of the elementary steps, which take place during their synthesis remains elusive. Herein, we have exploited scanning transmission electron microscopy coupled to energy dispersive X-ray spectroscopy, operando wide angle and small angle X-ray scattering and electrochemistry to unveil the formation and growth mechanism of hollow PtNi/C NPs...
March 24, 2017: Nano Letters
https://www.readbyqxmd.com/read/28340294/a-well-defined-osmium-cupin-complex-hyperstable-artificial-osmium-peroxygenase
#9
Nobutaka Fujieda, Takumi Nakano, Yuki Taniguchi, Haruna Ichihashi, Hideki Sugimoto, Yuma Morimoto, Yosuke Nishikawa, Genji Kurisu, Shinobu Itoh
Thermally stable TM1459 cupin superfamily protein from Thermotoga maritima was repurposed as an osmium (Os) peroxygenase by metal-substitution strategy employing the metal-binding promiscuity. This novel artificial metalloenzyme bears a datively bound Os ion supported by the 4-histidine motif. The well-defined Os center is responsible for not only the catalytic activity but also the thermodynamic stability of the protein folding, leading to the robust biocatalyst (Tm ≈ 120 °C). The spectroscopic analysis and atomic resolution X-ray crystal structures of Os-bound TM1459 revealed two types of donor sets to Os center with octahedral coordination geometry...
March 24, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28340293/functional-paper-based-platform-for-rapid-capture-and-detection-of-ceo2-nanoparticles
#10
Ali Othman, Daniel Andreescu, Dinusha P Karunaratne, Suryadevara V Babu, Silvana Andreescu
Development of systems for capture, sequestration and tracking of nanoparticles (NPs) is becoming a significant focus in many aspects of nanotechnology and environmental research. These systems enable a broad range of applications for evaluating concentration, distribution and effects of NPs for environmental, clinical, epidemiological and occupational exposure studies. Herein, we describe the first example of a ligand-graft multifunctional platform for capture and detection of cerium oxide (CeO2 or ceria) NPs...
March 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28340212/accelerated-senescence-in-skin-in-a-murine-model-of-radiation-induced-multi-organ-injury
#11
Elizabeth A McCart, Rajesh L Thangapazham, Eric D Lombardini, Steven R Mog, Ronald Allan M Panganiban, Kelley M Dickson, Rihab A Mansur, Vitaly Nagy, Sung-Yop Kim, Reed Selwyn, Michael R Landauer, Thomas N Darling, Regina M Day
Accidental high-dose radiation exposures can lead to multi-organ injuries, including radiation dermatitis. The types of cellular damage leading to radiation dermatitis are not completely understood. To identify the cellular mechanisms that underlie radiation-induced skin injury in vivo, we evaluated the time-course of cellular effects of radiation (14, 16 or 17 Gy X-rays; 0.5 Gy/min) in the skin of C57BL/6 mice. Irradiation of 14 Gy induced mild inflammation, observed histologically, but no visible hair loss or erythema...
March 18, 2017: Journal of Radiation Research
https://www.readbyqxmd.com/read/28340152/sarcopenia-and-relationships-between-muscle-mass-measured-glomerular-filtration-rate-and-physical-function-in-patients-with-chronic-kidney-disease-stages-3-5
#12
Yunan Zhou, Matthias Hellberg, Philippa Svensson, Peter Höglund, Naomi Clyne
Background.: Sarcopenia and poor physical function are common in patients with chronic kidney disease (CKD). Our aim was to investigate the relationships between muscle mass and measured glomerular filtration rate (GFR) and between muscle mass and strength and balance, respectively, in patients with CKD stages 3-5. Methods.: This is a baseline data analysis of a randomized controlled clinical trial. A total of 148 adult patients with an estimated GFR <30 mL/min/1...
March 1, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28340008/pre-treatment-interleukin-6-levels-strongly-affect-bone-erosion-progression-and-repair-detected-by-magnetic-resonance-imaging-in-rheumatoid-arthritis-patients
#13
Yasushi Kondo, Yuko Kaneko, Hiroaki Sugiura, Shunsuke Matsumoto, Naoshi Nishina, Masataka Kuwana, Masahiro Jinzaki, Tsutomu Takeuchi
Objective.: To examine the relationship between MRI structural damage and repair and plasma inflammatory cytokines in patients with RA. Methods.: A total of 88 newly diagnosed, untreated RA patients were enrolled. Contrast MRI of the dominant hand and X-rays of the hands and feet were performed at baseline and 1 year later. MR images were evaluated using RA MRI scoring, and X-ray. were assessed by the modified total Sharp score. Erosion progression was defined as changes in RA MRI scoring erosion or modified total Sharp score erosion of >0...
March 8, 2017: Rheumatology
https://www.readbyqxmd.com/read/28339950/improving-the-quality-of-radiological-examinations-effectiveness-of-an-internal-participatory-approach
#14
Francisco Manuel Batista Mamede, Zenewton André da Silva Gama, Pedro Jesus Saturno-Hernández
Quality problem or issue: To assess the quality of radiological examinations (REs) and to evaluate the effectiveness of a participatory continuous improvement approach to ensure best practices in a Portuguese hospital imaging department. Initial assessment: At baseline, we found 232 (10.2%) non-compliances, mostly related to the criteria image centering and framing in chest radiography (CXR), proper use of radiological protection equipment in other conventional RE (CR) and X-ray beam collimation (CXR/CR)...
March 2, 2017: International Journal for Quality in Health Care
https://www.readbyqxmd.com/read/28339664/adult-paget-s-disease-of-bone-a-review
#15
Stephen Paul Tuck, Robert Layfield, Julie Walker, Babitha Mekkayil, Roger Francis
Adult PD of bone is the second commonest metabolic bone condition after osteoporosis. The condition is characterized by increased bone cell activity, with bone-resorbing osteoclasts often larger and containing more nuclei than normal, and osteoblasts producing increased amounts of disorganized bone. This leads to expanded bone of poor quality possessing both sclerotic and lytic areas. PD of bone has a strong genetic element, with a family history being noted in 10-20% of cases. A number of genetic defects have been found to be associated with the condition...
February 17, 2017: Rheumatology
https://www.readbyqxmd.com/read/28339360/critical-role-of-stir-mri-in-early-detection-of-post-streptococcal-periostitis-with-dysproteinaemia-goldbloom-s-syndrome
#16
Riccardo Papa, Alessandro Consolaro, Francesca Minoia, Roberta Caorsi, Gianmichele Magnano, Marco Gattorno, Angelo Ravelli, Paolo Picco
OBJECTIVES: In 1966, Goldbloom et al. described two children who developed a peculiar clinical picture characterized by intermittent daily bone pain in the lower limbs, fever spikes, increased acute phase reactants and dysproteinaemia. The syndrome occurred two weeks after a group A β-haemolytic streptococcus infection. So far, only a few cases have been reported in the medical literature in English. METHODS: We report two further cases of Goldbloom's syndrome with a review of the literature in English...
March 23, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28339356/diagnostic-accuracy-of-musculoskeletal-ultrasound-and-conventional-radiography-in-the-assessment-of-the-wrist-triangular-fibrocartilage-complex-in-patients-with-definite-diagnosis-of-calcium-pyrophosphate-dihydrate-deposition-disease
#17
Andrea Di Matteo, Emilio Filippucci, Fausto Salaffi, Marina Carotti, Davide Carboni, Eleonora Di Donato, Walter Grassi
OBJECTIVES: To compare the diagnostic accuracy of musculoskeletal ultrasound (MSUS) and x-ray in evaluating wrist triangular fibrocartilage complex (TFCC) in patients with calcium pyrophosphate dihydrate deposition disease (CPPD) and to investigate the agreement between the extent of the calcium pyrophosphate dihydrate (CPP) crystal deposits assessed by MSUS and the radiographic findings. METHODS: We enrolled 84 patients: 36 patients with "definite" CPPD and 48 controls...
March 23, 2017: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/28339348/geological-occurrence-mineralogical-characterization-and-risk-assessment-of-potentially-carcinogenic-erionite-in-italy
#18
Matteo Giordani, Michele Mattioli, Paolo Ballirano, Alessandro Pacella, Marco Cenni, Matteo Boscardin, Laura Valentini
Erionite is a zeolite representing a well-known health hazard. In fact, exposure of humans to its fibers has been unequivocally associated with occurrence of malignant mesothelioma. For this reason, a multi-methodological approach, based upon field investigation, morphological characterization, scanning electron microscopy (SEM)/energy-dispersive spectroscopy (EDS) chemical analysis, and structure refinement through X-ray powder diffraction (XRPD), was applied to different samples of potentially carcinogenic erionite from Northern Italy...
2017: Journal of Toxicology and Environmental Health. Part B, Critical Reviews
https://www.readbyqxmd.com/read/28339278/erratum-x-ray-optics-on-a-chip-guiding-x-rays-in-curved-channels-phys-rev-lett-115-203902-2015
#19
T Salditt, S Hoffmann, M Vassholz, J Haber, M Osterhoff, J Hilhorst
This corrects the article DOI: 10.1103/PhysRevLett.115.203902.
March 10, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28339236/effect-of-biaxial-strain-on-the-phase-transitions-of-ca-fe_-1-x-co_-x-_-2-as_-2
#20
A E Böhmer, A Sapkota, A Kreyssig, S L Bud'ko, G Drachuck, S M Saunders, A I Goldman, P C Canfield
We study the effect of applied strain as a physical control parameter for the phase transitions of Ca(Fe_{1-x}Co_{x})_{2}As_{2} using resistivity, magnetization, x-ray diffraction, and ^{57}Fe Mössbauer spectroscopy. Biaxial strain, namely, compression of the basal plane of the tetragonal unit cell, is created through firm bonding of samples to a rigid substrate via differential thermal expansion. This strain is shown to induce a magnetostructural phase transition in originally paramagnetic samples, and superconductivity in previously nonsuperconducting ones...
March 10, 2017: Physical Review Letters
keyword
keyword
24201
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"