keyword
MENU ▼
Read by QxMD icon Read
search

competition

keyword
https://www.readbyqxmd.com/read/28454136/laser-writing-of-nonlinear-optical-properties-in-silver-doped-phosphate-glass
#1
E O Smetanina, B Chimier, Y Petit, A Royon, T Cardinal, L Canioni, G Duchateau
The formation of both local second- and third-harmonic generations (SHG and THG) induced by a train of femtosecond laser pulses in silver-doped phosphate glasses is addressed. Based on modeling calculations, including various diffusion and kinetic processes, THG is shown to result from the formation of silver clusters. The latter organize into a ring-shape structure, leading to the emergence of a static electric field. By breaking the glass centro-symmetry, this field gives rise to a local effective second-order susceptibility, inducing SHG...
May 1, 2017: Optics Letters
https://www.readbyqxmd.com/read/28454117/elimination-of-lmp1-expressing-cells-from-a-monolayer-of-gastric-cancer-ags-cells
#2
Yoshitaka Sato, Shingo Ochiai, Takayuki Murata, Teru Kanda, Fumi Goshima, Hiroshi Kimura
Epstein-Barr virus (EBV) latently infects malignant epithelial cells in approximately 10% of all gastric cancers. Latent membrane protein 1 (LMP1), an oncogenic protein, plays an important role in malignant transformation in EBV-associated nasopharyngeal carcinoma and B-cell lymphoma; however, its expression has not been detected in EBV-associated gastric cancer. To address why LMP1 has not been detected in EBV-positive gastric tumors, we focused on the interactions between LMP1-positive and -negative cells and stably expressed LMP1 in the gastric cancer cell line AGS...
April 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/28454005/competitive-sorption-affinity-of-sulfonamides-and-chloramphenicol-antibiotics-toward-functionalized-biochar-for-water-and-wastewater-treatment
#3
Mohammad Boshir Ahmed, John L Zhou, Huu Hao Ngo, Wenshan Guo, Md Abu Hasan Johir, Dalel Belhaj
Competitive sorption of sulfamethazine (SMT), sulfamethoxazole (SMX), sulfathiazole (STZ) and chloramphenicol (CP) toward functionalized biochar (fBC) was highly pH dependent with maximum sorption at pH ∼4.0-4.25. Equilibrium data were well represented by the Langmuir and Freundlich models in the order STZ>SMX>CP>SMT. Kinetics data were slightly better fitted by the pseudo second-order model than pseudo first-order and intra-particle-diffusion models. Maximum sorptive interactions occurred at pH 4...
April 13, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28453940/competition-between-hydrogen-evolution-and-carbon-dioxide-reduction-on-copper-electrodes-in-mildly-acidic-media
#4
Hideshi Ooka, Marta C Figueiredo, Marc T M Koper
Understanding the competition between hydrogen evolution and CO2 reduction is of fundamental importance to increase the faradaic efficiency for electrocatalytic CO2 reduction in aqueous electrolytes. Here, by using a copper rotating disc electrode, we find that the major hydrogen evolution pathway competing with CO2 reduction is water reduction, even in a relatively acidic electrolyte (pH 2.5). The mass-transport-limited reduction of protons takes place at potentials for which there is no significant competition with CO2 reduction...
April 28, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28453794/blood-flow-competition-after-aortic-valve-bypass-an-evaluation-using-computational-fluid-dynamics
#5
Koji Kawahito, Naoyuki Kimura, Kenji Komiya, Masanori Nakamura, Yoshio Misawa
OBJECTIVES: Aortic valve bypass (AVB) (apico-aortic conduit) remains an effective surgical alternative for patients in whom surgical aortic valve replacement or transcatheter aortic valve implantation is not feasible. However, specific complications include thrombus formation, possibly caused by stagnation arising from flow competition between the antegrade and retrograde flow, but this has not been fully investigated. The aim of this study was to analyse flow characteristics after AVB and to elucidate mechanisms of intra-aortic thrombus using computational fluid dynamics (CFD)...
May 1, 2017: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28453686/the-null-hypothesis-of-gsea-and-a-novel-statistical-model-for-competitive-gene-set-analysis
#6
Birgit Debrabant
Motivation: Competitive gene set analysis intends to assess whether a specific set of genes is more associated with a trait than the remaining genes. However, the statistical models assumed to date to underly these methods do not enable a clear cut formulation of the competitive null hypothesis. This is a major handicap to the interpretation of results obtained from a gene set analysis. Results: This work presents a hierarchical statistical model based on the notion of dependence measures, which overcomes this problem...
May 1, 2017: Bioinformatics
https://www.readbyqxmd.com/read/28453305/a-clinician-guide-to-altitude-training-for-optimal-endurance-exercise-performance-at-sea-level
#7
Keren Constantini, Daniel P Wilhite, Robert F Chapman
Constantini, Keren, Daniel P. Wilhite, and Robert F. Chapman. A clinician guide to altitude training for optimal endurance exercise performance at sea level. High Alt Med Biol 00:000-000, 2017.-For well over 50 years, endurance athletes have been utilizing altitude training in an effort to enhance performance in sea level competition. This brief review will offer the clinician a series of evidence-based best-practice guidelines on prealtitude and altitude training considerations, which can ultimately maximize performance improvement outcomes...
April 28, 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/28449226/an-integrated-network-analysis-identifies-how-arcab-enables-metabolic-oscillations-in-the-nitric-oxide-detoxification-network-of-escherichia-coli
#8
Sarah A Sacco, Kristin J Adolfsen, Mark P Brynildsen
The virulences of many pathogens depend on their abilities to detoxify the immune antimicrobial nitric oxide (NO•). The functions of bacterial NO• detoxification machinery depend on oxygen (O2 ), with O2 inhibiting some enzymes, whereas others use it as a substrate. Previously, Escherichia coli NO• detoxification was found to be highly attenuated under microaerobic conditions and metabolic oscillations were observed. The oscillations in [NO•] and [O2 ] were found to result from the inhibitory action of NO• on aerobic respiration, the catalytic inactivation of NO• by Hmp (an NO• dioxygenase), and an imbalanced competition for O2 between Hmp and cytochrome terminal oxidase activity...
April 27, 2017: Biotechnology Journal
https://www.readbyqxmd.com/read/28448453/working-memory-in-the-prefrontal-cortex
#9
REVIEW
Shintaro Funahashi
The prefrontal cortex participates in a variety of higher cognitive functions. The concept of working memory is now widely used to understand prefrontal functions. Neurophysiological studies have revealed that stimulus-selective delay-period activity is a neural correlate of the mechanism for temporarily maintaining information in working memory processes. The central executive, which is the master component of Baddeley's working memory model and is thought to be a function of the prefrontal cortex, controls the performance of other components by allocating a limited capacity of memory resource to each component based on its demand...
April 27, 2017: Brain Sciences
https://www.readbyqxmd.com/read/28448127/organo-copper-ii-complexes-as-products-of-radical-atom-transfer
#10
Timothy J Zerk, Paul V Bernhardt
Copper complexes bearing polyamine chelate ligands are among the most widely used and highly active catalysts for atom transfer radical polymerization (ATRP). Copper(I) complexes of these ligands (Cu(I)L) react with an alkyl halide initiator (RX) in the atom transfer step to generate the higher oxidation state halido complex Cu(II)LX and the radical R(•). However, Cu(I)L present in the reaction also has the potential to react with the liberated radicals to generate the organometallic species Cu(II)LR (where R is formally a carbanion)...
April 27, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28448125/efficient-computation-of-exchange-energy-density-with-gaussian-basis-functions
#11
Fenglai Liu, Jing Kong
Density Functional Theory(DFT) is widely applied in chemistry and Physics. Still it fails to predict correctly quantitatively or even qualitatively for systems with significant nondynamic correlations. Several DFT functionals were proposed in recently years to treat nondynamic correlation, most of which added the exact exchange energy density as a new variable, which becomes the computational bottleneck for calculations with these new functionals We present an implementation of an efficient seminumerical algorithm in this paper as a solution for this computational bottleneck...
April 27, 2017: Journal of Chemical Theory and Computation
https://www.readbyqxmd.com/read/28447986/resolving-affinity-purified-protein-complexes-by-blue-native-page-and-protein-correlation-profiling
#12
Mercedes Pardo, Daniel Bode, Lu Yu, Jyoti S Choudhary
Most proteins act in association with others; hence, it is crucial to characterize these functional units in order to fully understand biological processes. Affinity purification coupled to mass spectrometry (AP-MS) has become the method of choice for identifying protein-protein interactions. However, conventional AP-MS studies provide information on protein interactions, but the organizational information is lost. To address this issue, we developed a strategy to unravel the distinct functional assemblies a protein might be involved in, by resolving affinity-purified protein complexes prior to their characterization by mass spectrometry...
April 1, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28447959/using-measurable-dosimetric-quantities-to-characterize-the-inter-structural-tradeoff-in-inverse-planning
#13
Hongcheng Liu, Peng Dong, Lei Xing
Traditional inverse planning relies on the use of weighting factors to balance the conflicting requirements of different structures. The manual trial-and-error determination of the weighting factors has long been recognized as a time-consuming part of treatment planning. The purpose of this work is to develop an inverse planning framework that parameterizes the dosimetric tradeoff among the structures with physically meaningful quantities to simplify the search for clinically sensible plans. In this formalism, instead of using the weighting factors, permissible variation range of the prescription dose or dose volume histogram (DVH) of the involved structures are used to characterize the "importance" of the structures...
April 27, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28447889/bone-marrow-as-a-hematopoietic-stem-cell-source-for-gene-therapy-in-sickle-cell-disease-scd-evidence-from-rhesus-and-scd-patients
#14
Naoya Uchida, Atsushi Fujita, Matthew M Hsieh, Aylin Bonifacino, Allen E Krouse, Mark E Metzger, Robert E Donahue, John F Tisdale
Steady state bone marrow (BM) is the preferred hematopoietic stem cell (HSC) source for gene therapy in sickle cell disease (SCD) due to the recognized risk of vaso-occlusive crisis during granulocyte colony-stimulating factor mobilization. We previously established clinically relevant HSC gene transfer in the rhesus model following transplantation of mobilized peripheral blood (PB) CD34+ cells transduced with lentiviral vectors. In this study, we examined steady state bone marrow (BM) in the rhesus competitive repopulation model and demonstrate similar gene marking in vitro and in vivo, as compared to mobilized PB CD34+ cells...
April 27, 2017: Human Gene Therapy. Clinical Development
https://www.readbyqxmd.com/read/28447845/time-course-of-motor-affordances-evoked-by-pictured-objects-and-words
#15
Daniel N Bub, Michael E J Masson, Ragav Kumar
Correspondence effects based on the relationship between the left/right position of a pictured object's handle and the hand used to make a response, or on the size of the object and the nature of a grip response (power/precision), have been attributed to motor affordances evoked by the object. Effects of this nature, however, are readily explained by the similarity in the abstract spatial coding of the features that define the stimulus and response, without recourse to object-based affordances. We propose that in the task context of making reach-and-grasp actions, pictured objects may evoke genuine, limb-specific action constituents...
April 27, 2017: Journal of Experimental Psychology. Human Perception and Performance
https://www.readbyqxmd.com/read/28447701/structural-and-morphological-transitions-in-extension-induced-crystallization-of-poly-1-butene-melt
#16
Zhen Wang, Jianzhu Ju, Lingpu Meng, Nan Tian, Jiarui Chang, Haoran Yang, Youxin Ji, Fengmei Su, Liangbin Li
Structural and morphological transitions of flow-induced crystallization (FIC) in poly(1-butene) (PB-1) melt have been studied by combining extensional rheology and in situ synchrotron radiation ultrafast wide- and small-angle X-ray scattering (WAXD/SAXS) measurements. Unexpectedly, metastable Form III is crystallized directly from the PB-1 melt by high-speed extension, which has a short lifetime of several tens of milliseconds and manifests the thermodynamic and kinetic competition among Form III, Form II and melt under flow...
April 27, 2017: Soft Matter
https://www.readbyqxmd.com/read/28447700/evolution-inspired-engineering-of-antibiotic-biosynthesis-enzymes
#17
M Metsä-Ketelä
Streptomyces soil bacteria are competent chemists that are able to produce thousands of chemically complex natural products. Key to the development of this rich source of metabolites appears to be an evolutionary pressure that promotes chemical diversity; new biosynthetic pathways are continuously being formed in these bacteria, which may result in the appearance of a novel bioactive compound that provides significant competitive advantage to the producing organism. In recent years, our work has focused on understanding how minor changes in the biosynthetic enzymes has led to drastically altered catalytic properties...
April 27, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28447230/what-drives-insurer-participation-and-premiums-in-the-federally-facilitated-marketplace
#18
Jean Marie Abraham, Coleman Drake, Jeffrey S McCullough, Kosali Simon
We investigate determinants of market entry and premiums within the context of the Affordable Care Act's Marketplaces for individual insurance. Using Bresnahan and Reiss (1991) as the conceptual framework, we study how competition and firm heterogeneity relate to premiums in 36 states using Federally Facilitated or Supported Marketplaces in 2016. Our primary data source is the Qualified Health Plan Landscape File, augmented with market characteristics from the American Community Survey and Area Health Resource File as well as insurer-level information from federal Medical Loss Ratio annual reports...
April 26, 2017: International Journal of Health Economics and Management
https://www.readbyqxmd.com/read/28447179/influence-of-inherent-mechanophenotype-on-competitive-cellular-adherence
#19
Manisha K Shah, Iris H Garcia-Pak, Eric M Darling
Understanding the role of mechanophenotype in competitive adherence of cells to other cells versus underlying substrates can inform such processes as tissue development, cancer progression, and wound healing. This study investigated how mechanophenotype, defined by whole-cell, elastic/viscoelastic properties for the perinuclear region, and cellular assembly are intertwined through the mechanosensing process. Atomic force microscopy was used to characterize the temporal elastic/viscoelastic properties of individual and assembled fibroblasts grown on substrates with elastic moduli above, below, or similar to whole-cell mechanophenotypes measured for three, genetically modified cell lines...
April 26, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28447026/genome-dynamics-of-escherichia-coli-during-antibiotic-treatment-transfer-loss-and-persistence-of-genetic-elements-in-situ-of-the-infant-gut
#20
Andreas Porse, Heidi Gumpert, Jessica Z Kubicek-Sutherland, Nahid Karami, Ingegerd Adlerberth, Agnes E Wold, Dan I Andersson, Morten O A Sommer
Elucidating the adaptive strategies and plasticity of bacterial genomes in situ is crucial for understanding the epidemiology and evolution of pathogens threatening human health. While much is known about the evolution of Escherichia coli in controlled laboratory environments, less effort has been made to elucidate the genome dynamics of E. coli in its native settings. Here, we follow the genome dynamics of co-existing E. coli lineages in situ of the infant gut during the first year of life. One E. coli lineage causes a urinary tract infection (UTI) and experiences several alterations of its genomic content during subsequent antibiotic treatment...
2017: Frontiers in Cellular and Infection Microbiology
keyword
keyword
42846
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"