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https://www.readbyqxmd.com/read/28449550/modeling-the-effects-of-nanopatterned-surfaces-on-wetting-states-of-droplets
#1
Ke Xiao, Yanping Zhao, Gang Ouyang, Xinlei Li
An analytic thermodynamic model has been established to quantitatively investigate the wetting states of droplets on nanopatterned surfaces. Based on the calculations for the free energies of droplets with the Wenzel state and the Cassie-Baxter state, it is found that the size and shape of nanostructured surfaces play crucial roles in wetting states. In detail, for nanohole-patterned surfaces, the deep and thin nanoholes lead to the Cassie-Baxter state, and contrarily, the shallow and thick nanoholes result in the Wenzel state...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28449548/vibration-induced-property-change-in-the-melting-and-solidifying-process-of-metallic-nanoparticles
#2
Yonggang Zheng, Liquan Ding, Hongfei Ye, Zhen Chen
Tuning material properties in the 3-D printing process of metallic parts is a challenging task of current interests. Much research has been conducted to understand the effects of controlling parameters such as the particle geometry (size and shape), heating, and cooling ways on the outcome of the printing process. However, nothing has been done to explore the system vibration effect. This letter reports our findings on the vibration-induced property change in the melting and solidifying process of silver nanoparticles with the use of molecular dynamics simulation...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28449514/left-ventricular-outflow-tract-obstruction-due-to-a-left-ventricular-myxoma-that-was-misidentified-as-an-accessory-mitral-valve-tissue
#3
Seung-Hoon Baek, Hee Young Kim, Hyae Jin Kim, Sang Wook Shin, Hye Jin Kim, Yun Mi Choi, Eun Ji Choi, Eunjung Chang, Hong-Sik Son
We report obstruction of the left ventricle outflow tract (LVOT) caused by cardiac myxoma that was misidentified as an accessory mitral valve tissue preoperatively. A 65-year-old woman presented with chest discomfort that persisted for 7 days. Transthoracic echocardiography (TTE) revealed a mobile, low-echogenic, balloon-shaped mass attached to the anterior mitral valve leaflet and papillary muscle, which was suspected to be an accessory mitral valve tissue. Because the mass caused LVOT obstruction and it could result in hemodynamic instability, emergency operation was performed...
March 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/28449416/strengths-and-limitations-of-healthcare-databases-in-the-evaluation-of-hypoglycaemia
#4
Yoon Kong Loke, Katharina Mattishent
In this issue of DOM, Zaccardi et al. present an analysis of hypoglycaemia-related hospitalizations in the Hospital Episodes Statistics (HES) administrative database of the English National Health Service. [1] Notable strengths of the work include a large sample size involving more than 100 000 cases of hypoglycaemia, and nationwide capture spanning a duration of ten years. Key conclusions include the possibility of a U-shaped relationship between risk of hypoglycaemia and age, as well as possible associations between social deprivation and ethnicity with greater risk of hypoglycaemia...
April 27, 2017: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/28449277/expertise-shapes-domain-specific-functional-cerebral-asymmetry-during-mental-imagery-the-case-of-culinary-arts-and-music
#5
Moustafa Bensafi, Arnaud Fournel, Pauline Joussain, Johan Poncelet, Lauranne Przybylski
Mental imagery in experts has been documented in visual arts, music and dance. Here, we examined this issue in an understudied art domain, namely culinary arts. Previous research investigating mental imagery in experts has reported either a stronger involvement of the right hemisphere or bilateral brain activation. The first aim of our study was to examine whether culinary arts also recruit such a hemispheric pattern specifically during odor mental imagery. In a second aim, we investigated whether expertise effects observed in a given sensory domain transfer to another modality...
April 27, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28449202/barn-owls-maximize-head-rotations-by-a-combination-of-yawing-and-rolling-in-functionally-diverse-regions-of-the-neck
#6
Markus Krings, John A Nyakatura, Mark L L M Boumans, Martin S Fischer, Hermann Wagner
Owls are known for their outstanding neck mobility: these birds can rotate their heads more than 270°. The anatomical basis of this extraordinary neck rotation ability is not well understood. We used X-ray fluoroscopy of living owls as well as forced neck rotations in dead specimens and computer tomographic (CT) reconstructions to study how the individual cervical joints contribute to head rotation in barn owls (Tyto furcata pratincola). The X-ray data showed the natural posture of the neck, and the reconstructions of the CT-scans provided the shapes of the individual vertebrae...
April 27, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/28449112/phenotypic-variability-of-the-amazonian-species-rhodnius-brethesi-hemiptera-reduviidae
#7
A C Souza, S Catalá, A L Carbajal de la Fuente, A C V Junqueira
The wild species Rhodnius brethesi (Matta, 1919) (Hemiptera: Reduviidae) is found in areas of piassabais in microregion of Rio Negro, Amazonas, Brazil. Its geographical distribution overlaps the areas of Leopoldinia piassaba palm. In areas where palm trees are found, transmission cycle of Trypanosoma cruzi is related to the extractive activity of the palm fiber, exposing workers to wild vector transmission of this parasite. The close association with the palm tree L. piassaba suggests that this wild triatomine has special features in its sensory system allowing specificity of ecotope...
April 25, 2017: Journal of Medical Entomology
https://www.readbyqxmd.com/read/28449100/integrated-analysis-of-individual-codon-contribution-to-protein-biosynthesis-reveals-a-new-approach-to-improving-the-basis-of-rational-gene-design
#8
Juan C Villada, Otávio José Bernardes Brustolini, Wendel Batista da Silveira
Gene codon optimization may be impaired by the misinterpretation of frequency and optimality of codons. Although recent studies have revealed the effects of codon usage bias (CUB) on protein biosynthesis, an integrated perspective of the biological role of individual codons remains unknown. Unlike other previous studies, we show, through an integrated framework that attributes of codons such as frequency, optimality and positional dependency should be combined to unveil individual codon contribution for protein biosynthesis...
April 24, 2017: DNA Research: An International Journal for Rapid Publication of Reports on Genes and Genomes
https://www.readbyqxmd.com/read/28448974/the-feasibility-and-safety-of-interventional-occlusion-treatment-of-intracristal-ventricular-septal-defects-clinical-report-of-56-cases
#9
Ting Cui, Wanfeng Sun, Yanhong He, Guopei Zhang, Dajie Wang, Yudong Xia, Feng Wang, Mingxing Zhu
BACKGROUND: To investigate the feasibility and safety of the O eccentric shape occluder in the interventional occlusion treatment of intracristal ventricular septal defect (IVSD). METHODS: A retrospective analysis of the clinical data of 56 IVSD patients treated by interventional occlusion at our center, as well as recording of their intraoperative and postoperative status, was performed. RESULTS: Of the 56 patients, a total of 48 patients underwent successful occlusion during the first surgical attempt...
April 28, 2017: Cardiology
https://www.readbyqxmd.com/read/28448851/accurate-3d-reconstruction-of-bony-surfaces-using-ultrasonic-synthetic-aperture-techniques-for-robotic-knee-arthroplasty
#10
William Kerr, Philip Rowe, Stephen Gareth Pierce
Robotically guided knee arthroplasty systems generally require an individualized, preoperative 3D model of the knee joint. This is typically measured using Computed Tomography (CT) which provides the required accuracy for preoperative surgical intervention planning. Ultrasound imaging presents an attractive alternative to CT, allowing for reductions in cost and the elimination of doses of ionizing radiation, whilst maintaining the accuracy of the 3D model reconstruction of the joint. Traditional phased array ultrasound imaging methods, however, are susceptible to poor resolution and signal to noise ratios (SNR)...
April 19, 2017: Computerized Medical Imaging and Graphics: the Official Journal of the Computerized Medical Imaging Society
https://www.readbyqxmd.com/read/28448714/octopus-inspired-assembly-of-nanosucker-arrays-for-dry-wet-adhesion
#11
Ying-Chu Chen, Hongta Yang
The octopus is able to adhere to slippery, fouled and irregular surfaces in the marine intertidal environment, because of its periodic infundibulum-shaped suckers on the arms. Here, we report a scalable self-assembly technique for fabricating adhesion materials that mimic octopus-sucker functionality. By utilizing spin-coated two-dimensional colloidal crystals as templates, non-close-packed nanosucker arrays are patterned on silicone substrates. The resulting nanosuckers can be deformed to exhibit great adhesive capacities on both micro-rough and flat surfaces in dry and wet environments...
April 27, 2017: ACS Nano
https://www.readbyqxmd.com/read/28448619/pyridoxal-phosphate-synthases-pdxs-pdxt-are-required-for-actinobacillus-pleuropneumoniae-viability-stress-tolerance-and-virulence
#12
Fang Xie, Gang Li, Yalei Wang, Yanhe Zhang, Long Zhou, Chengcheng Wang, Shuanghong Liu, Siguo Liu, Chunlai Wang
Pyridoxal 5'-phosphate (PLP) is an essential cofactor for numerous enzymes involved in a diversity of cellular processes in living organisms. Previous analysis of the Actinobacillus pleuropneumoniae S-8 genome sequence revealed the presence of pdxS and pdxT genes, which are implicated in deoxyxylulose 5-phosphate (DXP)-independent pathway of PLP biosynthesis; however, little is known about their roles in A. pleuropneumoniae pathogenicity. Our data demonstrated that A. pleuropneumoniae could synthesize PLP by PdxS and PdxT enzymes...
2017: PloS One
https://www.readbyqxmd.com/read/28448597/reconstructing-grassland-fire-history-using-sedimentary-charcoal-considering-count-size-and-shape
#13
Berangere A Leys, Julie L Commerford, Kendra K McLauchlan
Fire is a key Earth system process, with 80% of annual fire activity taking place in grassland areas. However, past fire regimes in grassland systems have been difficult to quantify due to challenges in interpreting the charcoal signal in depositional environments. To improve reconstructions of grassland fire regimes, it is essential to assess two key traits: (1) charcoal count, and (2) charcoal shape. In this study, we quantified the number of charcoal pieces in 51 sediment samples of ponds in the Great Plains and tested its relevance as a proxy for the fire regime by examining 13 potential factors influencing charcoal count, including various fire regime components (e...
2017: PloS One
https://www.readbyqxmd.com/read/28448436/role-of-archaeal-hera-protein-in-the-biology-of-the-bacterium-thermus-thermophilus
#14
Alba Blesa, Nieves G Quintans, Ignacio Baquedano, Carlos P Mata, José R Castón, José Berenguer
Intense gene flux between prokaryotes result in high percentage of archaeal genes in the genome of the thermophilic bacteria Thermus spp. Among these archaeal genes a homolog to the Sulfolobus spp. HerA protein appears in all of the Thermus spp. strains so far sequenced (HepA). The role of HepA in Thermus thermophilus HB27 has been analyzed using deletion mutants, and its structure resolved at low resolution by electron microscopy. Recombinant HepA shows DNA-dependent ATPase activity and its structure revealed a double ring, conically-shaped hexamer with an upper diameter of 150 Å and a bottom module of 95 Å...
April 27, 2017: Genes
https://www.readbyqxmd.com/read/28448431/a-type-2-block-component-decomposition-based-2d-aoa-estimation-algorithm-for-an-electromagnetic-vector-sensor-array
#15
Yu-Fei Gao, Guan Gui, Wei Xie, Yan-Bin Zou, Yue Yang, Qun Wan
This paper investigates a two-dimensional angle of arrival (2D AOA) estimation algorithm for the electromagnetic vector sensor (EMVS) array based on Type-2 block component decomposition (BCD) tensor modeling. Such a tensor decomposition method can take full advantage of the multidimensional structural information of electromagnetic signals to accomplish blind estimation for array parameters with higher resolution. However, existing tensor decomposition methods encounter many restrictions in applications of the EMVS array, such as the strict requirement for uniqueness conditions of decomposition, the inability to handle partially-polarized signals, etc...
April 27, 2017: Sensors
https://www.readbyqxmd.com/read/28448310/comparison-of-power-versus-manual-injection-in-bolus-shape-and-image-quality-on-contrast-enhanced-magnetic-resonance-angiography-an-experimental-study-in-a-swine-model
#16
Takahiro Tsuboyama, Gregor Jost, Hubertus Pietsch, Noriyuki Tomiyama
OBJECTIVE: The aim of this study was to compare power versus manual injection in bolus shape and image quality on contrast-enhanced magnetic resonance angiography (CE-MRA). MATERIALS AND METHODS: Three types of CE-MRA (head-neck 3-dimensional [3D] MRA with a test-bolus technique, thoracic-abdominal 3D MRA with a bolus-tracking technique, and thoracic-abdominal time-resolved 4-dimensional [4D] MRA) were performed after power and manual injection of gadobutrol (0...
April 26, 2017: Investigative Radiology
https://www.readbyqxmd.com/read/28448205/practicing-maternal-virtues-prematurely-the-phenomenology-of-maternal-identity-in-medically-high-risk-pregnancy
#17
Laura Curran, Judith McCoyd, Shari Munch, Bonnie Wilkenfeld
In this study, we examine the phenomenology of maternal identity development among U.S. women hospitalized with medically high risk pregnancies (MHRP). We conducted 16 in-depth interviews with women and find that they drew on culturally normative notions of maternal nurture, worry, and sacrifice to construct maternal identity in the context of MHRP. Based on our findings, we suggest that MHRP shapes women's sense of a unique connection to and distinctive cognitive representations of their fetus that are facilitated by the use of technology...
April 27, 2017: Health Care for Women International
https://www.readbyqxmd.com/read/28448153/on-the-thermal-stability-of-metal-nanocrystals-an-investigation-of-the-surface-and-bulk-reconstructions-of-pd-concave-icosahedra
#18
Kyle D Gilroy, Ahmed O Elnabawy, Tung-Han Yang, Luke T Roling, Jane Howe, Manos Mavrikakis, Younan Xia
Despite the remarkable success in controlling the synthesis of metal nanocrystals, it still remains a grand challenge to stabilize and preserve the shapes or internal structures of metastable kinetic products. In this work, we address this issue by systematically investigating the surface and bulk reconstructions experienced by a Pd concave icosahedron when subjected to heating up to 600 (o)C in vacuum. We used in situ high-resolution transmission electron microscopy to identify the equilibration pathways of this far-from-equilibrium structure...
April 27, 2017: Nano Letters
https://www.readbyqxmd.com/read/28448140/essentially-trap-free-cspbbr3-colloidal-nanocrystals-by-post-synthetic-thiocyanate-surface-treatment
#19
Brent A Koscher, Joseph K Swabeck, Noah D Bronstein, A Paul Alivisatos
We demonstrate post-synthetic modification of CsPbBr3 nanocrystals by a thiocyanate salt treatment. This treatment improves the quantum yield of both freshly synthesized (PLQY~90%) and aged nanocrystals (PLQY~70%) to within measurement error (2-3%) of unity, while simultaneously maintaining the shape, size, and colloidal stability. Additionally, the luminescence decay kinetics transform from multi-exponential decays typical of nanocrystalline semiconductors with a distribution of trap sites, to a monoexponential decay, typical of single energy level emitters...
April 27, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28448113/a-solvent-free-chemical-approach-to-synthesize-various-morphological-co3o4-for-co-oxidation
#20
Kun Wang, Yali Cao, Jindou Hu, Yizhao Li, Jing Xie, Dianzeng Jia
The synthesis of Co3O4 nanomaterials with diverse morphologies were usually synthesized in liquid phase accompanied by the template or surfactant, even harsh conditions, which further restricted their practical application. Herein, we reported an extremely simple and practical solid-state chemical method to synthesize Co3O4-octahedrons, -plates and -rods. Among these, the shape control of Co3O4-octahedrons and Co3O4-plates involve the variation of the amount of reactant, and the formation of Co3O4-rods with {110} facet can be achieved by replacing the reactant...
April 27, 2017: ACS Applied Materials & Interfaces
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