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https://www.readbyqxmd.com/read/29457811/liquid-crystalline-behaviour-of-self-assembled-laponite%C3%A2-pll-peg-nanocomposites
#1
P Xu, Y Lan, Z Xing, E Eiser
Synthetic LAPONITE®-clay particles with platelet-like shape display strong aging when dispersed in aqueous solutions, preventing the latter from reaching their natural liquid-crystalline equilibrium state. Here we introduce a facile method that successfully prevents this aging behaviour and enables accessing the systems' liquid-crystal and crystalline phases. We graft the comb-like polymer PLL-PEG (poly(l-lysine)-g-poly(ethylene glycol)) onto the clay surfaces from solution, thereby screening the negative surface charges and thus ensuring steric stabilisation...
February 19, 2018: Soft Matter
https://www.readbyqxmd.com/read/29457229/radiomics-analysis-of-pulmonary-nodules-in-low-dose-ct-for-early-detection-of-lung-cancer
#2
Wookjin Choi, Jung Hun Oh, Sadegh Riyahi, Chia-Ju Liu, Feng Jiang, Wengen Chen, Charles White, Andreas Rimner, James G Mechalakos, Joseph O Deasy, Wei Lu
PURPOSE: To develop a radiomics prediction model to improve pulmonary nodule (PN) classification in low-dose CT. To compare the model with the American College of Radiology (ACR) Lung CT Screening Reporting and Data System (Lung-RADS) for early detection of lung cancer. METHODS: We examined a set of 72 PNs (31 benign and 41 malignant) from the Lung Image Database Consortium image collection (LIDC-IDRI). 103 CT radiomic features were extracted from each PN. Before the model building process, distinctive features were identified using a hierarchical clustering method...
February 19, 2018: Medical Physics
https://www.readbyqxmd.com/read/29456401/management-of-complicated-crown-fracture-by-reattachment-using-fiber-post-minimal-intervention-approach
#3
Ambar W Raut, Vijay Mantri, Vaibhao I Shambharkar, Mitul Mishra
Anterior crown fractures are a common form of traumatic dental injuries that mainly affect the maxillary incisors, especially in children and adolescents. Complicated crown fractures although less common, pose a challenge to the clinician. The main objective while treating such cases is successful pain management and immediate restoration of function, esthetics and phonetics. Since the development of the adhesive dentistry, the patient's own fragment can be used to restore the fractured tooth. Reattachment of fractured tooth fragments offers a viable restorative alternative...
January 2018: Journal of Natural Science, Biology, and Medicine
https://www.readbyqxmd.com/read/29456139/selective-attention-gates-the-interactive-crossmodal-coupling-between-perceptual-systems
#4
Silvia Convento, Md Shoaibur Rahman, Jeffrey M Yau
Sensory cortical systems often activate in parallel, even when stimulation is experienced through a single sensory modality [1-3]. Co-activations may reflect the interactive coupling between information-linked cortical systems or merely parallel but independent sensory processing. We report causal evidence consistent with the hypothesis that human somatosensory cortex (S1), which co-activates with auditory cortex during the processing of vibrations and textures [4-9], interactively couples to cortical systems that support auditory perception...
February 1, 2018: Current Biology: CB
https://www.readbyqxmd.com/read/29455985/pd-hnts-cdns-g-c-3-n-4-a-novel-heterogeneous-catalyst-for-promoting-ligand-and-copper-free-sonogashira-and-heck-coupling-reactions-benefits-from-halloysite-and-cyclodextrin-chemistry-and-g-c-3-n-4-contribution-to-suppress-pd-leaching
#5
Samahe Sadjadi, Majid M Heravi, Masoumeh Malmir
For the first time, a ternary hybrid system composed of halloysite nanotubes, HNTs, cyclodextrin nanosponges, CDNS, and g-C3 N4 is prepared and used for immobilization of Pd(0) nanoparticles and development of a heterogeneous catalyst, Pd@HNTs-CDNS-g-C3 N4 for promoting ligand and copper-free Sonogashira and Heck coupling reactions in aqueous media. HNT as a porous tubular clay with outstanding thermal, mechanical and textural properties can act as a support for immobilizing Pd nanoparticles. The role of CDNS can be explained on the base of its capability to form inclusion complexe with substrates and bringing them in the vicinity of the catalytic active sites...
April 15, 2018: Carbohydrate Polymers
https://www.readbyqxmd.com/read/29455440/computer-aided-solution-for-automatic-segmenting-and-measurements-of-blood-leucocytes-using-static-microscope-images
#6
Enas Abdulhay, Mazin Abed Mohammed, Dheyaa Ahmed Ibrahim, N Arunkumar, V Venkatraman
Blood leucocytes segmentation in medical images is viewed as difficult process due to the variability of blood cells concerning their shape and size and the difficulty towards determining location of Blood Leucocytes. Physical analysis of blood tests to recognize leukocytes is tedious, time-consuming and liable to error because of the various morphological components of the cells. Segmentation of medical imagery has been considered as a difficult task because of complexity of images, and also due to the non-availability of leucocytes models which entirely captures the probable shapes in each structures and also incorporate cell overlapping, the expansive variety of the blood cells concerning their shape and size, various elements influencing the outer appearance of the blood leucocytes, and low Static Microscope Image disparity from extra issues outcoming about because of noise...
February 17, 2018: Journal of Medical Systems
https://www.readbyqxmd.com/read/29455038/mechanical-and-degradation-property-improvement-in-a-biocompatible-mg-ca-sr-alloy-by-thermomechanical-processing
#7
Hunter B Henderson, Vidhya Ramaswamy, Alexander E Wilson-Heid, Michael S Kesler, Josephine B Allen, Michele V Manuel
Magnesium-based alloys have attracted interest as a potential material to comprise biomedical implants that are simultaneously high-strength and temporary, able to provide stabilization before degrading safely and able to be excreted by the human body. Many alloy systems have been evaluated, but this work reports on improved properties through hot extrusion of one promising alloy: Mg-1.0 wt% Ca-0.5 wt%Sr. This alloy has previously demonstrated promising toxicity and degradation properties in the as-cast and rolled conditions...
February 3, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29454644/testing-aggressive-behaviour-in-a-feeding-context-importance-of-ethologically-relevant-stimuli
#8
Daniel González, Péter Szenczi, Oxána Bánszegi, Robyn Hudson
The choice of stimuli used in tests of animal behaviour can have a critical effect on the outcome. Here we report two experiments showing how different foods influence aggressive behaviour in competition tests at weaning among littermates of the domestic cat. Whereas in Experiment 1 canned food elicited almost no overt competition, a piece of raw beef rib elicited clearly aggressive behaviour among littermates. In Experiment 2 the food stimuli were chosen to differ from raw beef rib in various combinations of taste/smell, texture and monopolizability...
February 15, 2018: Behavioural Processes
https://www.readbyqxmd.com/read/29453050/enhancement-in-the-aromatic-yield-from-the-catalytic-fast-pyrolysis-of-rice-straw-over-hexadecyl-trimethyl-ammonium-bromide-modified-hierarchical-hzsm-5
#9
Zihao Zhang, Hao Cheng, Hao Chen, Kequan Chen, Xiuyang Lu, Pingkai Ouyang, Jie Fu
Modified H-type ZSM-5 (HZSM-5) catalysts were prepared using hexadecyl trimethyl ammonium bromide (CTAB) as mesopore templates to enhance the activity for the catalytic fast pyrolysis of rice straw for aromatics compounds. A certain quantity of CTAB added into the HZSM-5 (HZ) forming hierarchical structure exhibited an improvement in the yield of the aromatics and a decrease in the yield of coke in comparison with that of bare HZ. In contrast, excessive CTAB addition resulted in a decrease in aromatic yield and an increase in coke yield...
February 8, 2018: Bioresource Technology
https://www.readbyqxmd.com/read/29451469/evaluation-of-the-warming-sensation-acceptability-and-local-tolerability-of-an-acetylcysteine-oral-solution-containing-the-flavoring-agent-iff-flavor-316282-in-the-treatment-of-productive-cough
#10
Frank Donath, Anna Grinienko, Pascal Mallefet, Michel Jean-Pierre Ozun, Lucy Shneyer
OBJECTIVE: This open-label study sought to evaluate the warming sensation produced by IFF flavor 316282 in an acetylcysteine oral solution in subjects with productive cough. MATERIALS: 2% ace-tylcysteine oral solution (200 mg per 10 mL) containing IFF flavor 316282. METHODS: Subjects (N = 57; mean age 38.7 years; 58% female) with a productive cough lasting < 7 days and rated as mild to moderate in severity received 10 mL of study product...
February 16, 2018: International Journal of Clinical Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/29449624/a-water-droplet-pinning-and-heat-transfer-characteristics-on-an-inclined-hydrophobic-surface
#11
Abdullah Al-Sharafi, Bekir Sami Yilbas, Haider Ali, N AlAqeeli
A water droplet pinning on inclined hydrophobic surface is considered and the droplet heat transfer characteristics are examined. Solution crystallization of polycarbonate is carried out to create hydrophobic characteristics on the surface. The pinning state of the water droplet on the extreme inclined hydrophobic surface (0° ≤ δ ≤ 180°, δ being the inclination angle) is assessed. Heat transfer from inclined hydrophobic surface to droplet is simulated for various droplet volumes and inclination angles in line with the experimental conditions...
February 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29449144/a-dynamic-graph-cuts-method-with-integrated-multiple-feature-maps-for-segmenting-kidneys-in-2d-ultrasound-images
#12
Qiang Zheng, Steven Warner, Gregory Tasian, Yong Fan
RATIONALE AND OBJECTIVES: Automatic segmentation of kidneys in ultrasound (US) images remains a challenging task because of high speckle noise, low contrast, and large appearance variations of kidneys in US images. Because texture features may improve the US image segmentation performance, we propose a novel graph cuts method to segment kidney in US images by integrating image intensity information and texture feature maps. MATERIALS AND METHODS: We develop a new graph cuts-based method to segment kidney US images by integrating original image intensity information and texture feature maps extracted using Gabor filters...
February 12, 2018: Academic Radiology
https://www.readbyqxmd.com/read/29449051/differences-in-the-validity-of-a-visual-estimation-method-for-determining-patients-meal-intake-between-various-meal-types-and-supplied-food-items
#13
Yui Kawasaki, Rie Akamatsu, Yuki Tamaura, Masashi Sakai, Keiko Fujiwara, Satomi Tsutsuura
BACKGROUND & AIMS: The aim of this study was to examine differences in the validity of a visual estimation method for determining patients' meal intake between various meal types and supplied food items in hospitals and to find factors influencing the validity of a visual estimation method. METHODS: There are two procedures by which we obtained the information on dietary intake of the patients in these hospitals. These are both by visual assessment from the meal trays at the time of their clearing, by the attending nursing staff and by weighing conducted by researchers...
February 12, 2018: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/29448051/elasticity-and-wave-velocity-in-fcc-iron-austenite-at-elevated-temperatures-experimental-verification-of-ab-initio-calculations
#14
Bevis Hutchinson, Mikael Malmström, Johan Lönnqvist, Pete Bate, Hossein Ehteshami, Pavel A Korzhavyi
High temperature crystal elasticity constants for face centred cubic austenite are important for interpreting the ultrasonic properties of iron and steels but cannot be determined by normal single crystal methods. Values of these constants have recently been calculated using an ab-initio approach and the present work was carried out to test their applicability using laser-ultrasonic measurements. Steel samples having a known texture were examined at temperatures between 800 °C and 1100 °C to measure the velocity of longitudinal P-waves which were found to be in good agreement with modelled values...
February 8, 2018: Ultrasonics
https://www.readbyqxmd.com/read/29445956/high-performance-of-pedot-pss-n-si-solar-cells-based-on-textured-surface-with-agnws-electrodes
#15
Xiangyu Jiang, Pengbo Zhang, Juan Zhang, Jilei Wang, Gaofei Li, Xiaohong Fang, Liyou Yang, Xiaoyuan Chen
Hybrid heterojunction solar cells (HHSCs) have gained extensive research and attention due to simple device structure and low-cost technological processes. Here, HHSCs are presented based on a highly transparent conductive polymer poly(3,4ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS) directly spin-coated on an n-type crystalline silicon with microscale surface textures, which are prepared by traditional chemical etching. We have studied interface properties between PEDOT:PSS and textured n-Si by varying coating conditions...
February 14, 2018: Nanoscale Research Letters
https://www.readbyqxmd.com/read/29445830/bone-health-assessment-in-older-people-with-or-without-muscle-health-impairment
#16
M Locquet, C Beaudart, O Bruyère, J A Kanis, L Delandsheere, J-Y Reginster
This study investigated the relationship between muscle and bone status in elderly individuals. Our results suggested links between sarcopenia and osteoporosis; impairment in muscle status (i.e., muscle mass, muscle strength, and physical performance) is associated with deterioration in bone mass and texture subsequently leading to an increased risk of fracture. INTRODUCTION: Accumulating evidence has shown associations between sarcopenia and osteoporosis, but existing studies face inconsistencies in the clinical definition of both conditions...
February 14, 2018: Osteoporosis International
https://www.readbyqxmd.com/read/29445222/water-droplet-dynamics-on-a-hydrophobic-surface-in-relation-to-the-self-cleaning-of-environmental-dust
#17
Bekir Sami Yilbas, Ghassan Hassan, Abdullah Al-Sharafi, Haider Ali, Nasser Al-Aqeeli, Abdelsalam Al-Sarkhi
The dynamic motion of a water droplet on an inclined hydrophobic surface is analyzed with and without environmental dust particles on the surface. Solution crystallization of a polycarbonate surface is carried out to generate a hydrophobic surface with hierarchical texture composed of micro/nanosize spheroids and fibrils. Functionalized nanosize silica particles are deposited on the textured surface to reduce contact angle hysteresis. Environmental dust particles are collected and characterized using analytical tools prior to the experiments...
February 14, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29444716/prevalence-of-inadequate-micronutrient-intakes-of-canadian-long-term-care-residents
#18
Heather H Keller, Christina Lengyel, Natalie Carrier, Susan E Slaughter, Jill Morrison, Alison M Duncan, Catriona M Steele, Lisa Duizer, K Stephen Brown, Habib Chaudhury, Minn N Yoon, Veronique Boscart, George Heckman, Lita Villalon
This study determines the prevalence of inadequate micronutrient intakes consumed by long-term care (LTC) residents. This cross-sectional study was completed in thirty-two LTC homes in four Canadian provinces. Weighed and estimated food and beverage intake were collected over 3 non-consecutive days from 632 randomly selected residents. Nutrient intakes were adjusted for intra-individual variation and compared with the Dietary Reference Intakes. Proportion of participants, stratified by sex and use of modified (MTF) or regular texture foods, with intakes below the Estimated Average Requirement (EAR) or Adequate Intake (AI), were identified...
February 15, 2018: British Journal of Nutrition
https://www.readbyqxmd.com/read/29443757/various-surgical-techniques-to-create-an-aesthetic-appearance-at-the-donor-site-of-anterolateral-thigh-free-flaps-based-on-the-oblique-branch-twenty-one-clinical-case-reports
#19
Chengliang Deng, Hai Li, Zairong Wei, Wenhu Jin, Kaiyu Nie, Shujun Li, Bihua Wu, Dali Wang
RATIONALE: Reducing the morbidity associated with anterolateral thigh (ALT) donor sites by performing aesthetic restoration has become a popular research topic. Various surgical techniques have been developed allowing for direct closure of the donor site. However, closure techniques for ALT donor sites based on the oblique branch have not been systematically reported. PATIENT CONCERNS: Data from 21 patients (18 males, 3 females) undergoing operative reconstruction with an ALT free flap between January 2016 and December 2016...
February 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29443389/can-we-trust-the-calculation-of-texture-indices-of-ct-images-a-phantom-study
#20
C Caramella, A Allorant, F Orlhac, F Bidault, B Asselain, S Ammari, P Jaranowski, A Moussier, C Balleyguier, N Lassau, S Pitre-Champagnat
PURPOSE: Texture analysis is an emerging tool in the field of medical imaging analysis. However, many issues have been raised in terms of its use in assessing patient images and it is crucial to harmonize and standardize this new imaging measurement tool. This study was designed to evaluate the reliability of texture indices of CT images on a phantom including a reproducibility study, to assess the discriminatory capacity of indices potentially relevant in CT medical images and to determine their redundancy...
February 14, 2018: Medical Physics
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