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https://www.readbyqxmd.com/read/28645089/drug-resistance-mechanism-of-l10f-l10f-n88s-and-l90m-mutations-in-crf01_ae-hiv-1-protease-molecular-dynamics-simulations-and-binding-free-energy-calculations
#1
C S Vasavi, Ramasamy Tamizhselvi, Punnagai Munusami
HIV-1 protease plays a crucial role in viral replication and maturation, which makes it one of the most attractive targets for anti-retroviral therapy. The majority of HIV infections in developing countries are due to non-B subtype. Subtype AE is spreading rapidly and infecting huge population worldwide. The mutations in the active site of subtype AE directly impair the interactions with the inhibitor. The non-active site mutations influence the binding of the inhibitor indirectly and their resistance mechanism is not well understood...
June 8, 2017: Journal of Molecular Graphics & Modelling
https://www.readbyqxmd.com/read/28645060/young-people-who-use-drugs-engaged-in-harm-reduction-programs-in-new-york-city-overdose-and-other-risks
#2
Michele Calvo, Jessica MacFarlane, Heather Zaccaro, Matthew Curtis, María Cabán, Jamie Favaro, Marian R Passannante, Taeko Frost
BACKGROUND: Little is known about the engagement of young people who use drugs (PWUD) in harm reduction programs (HRPs), and few studies have included non-opioid users and non-injectors. While HRPs have effectively engaged PWUD, young people are under-represented in their services. METHODS: The Injection Drug Users Health Alliance Citywide Study (IDUCS) is the largest community-based study of PWUD in HRPs in the US. From 2014-2015, 2421 HRP participants across New York City (NYC) completed a cross-sectional survey...
June 15, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28645058/promoting-physical-activity-in-high-poverty-neighborhood-parks-a-cluster-randomized-controlled-trial
#3
Deborah A Cohen, Bing Han, Kathryn P Derose, Stephanie Williamson, Terry Marsh, Laura Raaen, Thomas L McKenzie
Although physical activity can help mitigate or prevent multiple chronic diseases, most people in the U.S., especially high-poverty minority groups, engage in insufficient levels of physical activity. To test ways to promote more physical activity in high-poverty area public parks we conducted a randomized controlled intervention trial. After completing baseline measures of park-based physical activity using systematic direct observation three times/day each month for six months and assessing preferences for park programming among 1445 residents living within 1 mile of study parks, we randomized 48 parks in high poverty neighborhoods in the City of Los Angeles, California during 2013-2014 to four study arms: 1) free physical activity classes over a 6-month period, 2) a frequent user program where participants could win prizes based upon the number of visits they made to the park, 3) both the programs, and 4) neither one (control condition)...
June 3, 2017: Social Science & Medicine
https://www.readbyqxmd.com/read/28644960/improved-simulation-based-hr-ebsd-procedure-using-image-gradient-based-dic-techniques
#4
Jon Alkorta, Matthieu Marteleur, Pascal J Jacques
Conventional HR-EBSD is attracting much interest due to its ability of measuring relative crystal misorientations and microstresses with great accuracy. However, this technique needs the use of simulated patterns in order to get absolute values of crystal orientation and stresses and thus expand its use to intergranular analyses. Simulation-based approaches have shown many limitations due to the poor correlation with the real patterns specially when Bragg simulations are considered. This paper presents an improved algorithm based on gradient-based correlation techniques that makes simulation-based HR-EBSD possible...
June 14, 2017: Ultramicroscopy
https://www.readbyqxmd.com/read/28644893/high-speed-rail-and-coastal-tourism-identifying-passenger-profiles-and-travel-behaviour
#5
Aaron Gutiérrez, Armando Ortuño
In this paper, we characterise tourists most likely to visit a coastal destination by high-speed rail (HSR). Our data came from a survey conducted among HSR passengers during 2014's high season (July and August) at Spain's Camp de Tarragona and Alicante Stations, each of which is near a mass tourism destination on the Mediterranean coast: the Costa Daurada and the Costa Blanca, respectively. We used responses to the survey, which presented binary discrete-choice situations, to construct a database necessary for a logistic regression model that allowed us to examine how passenger profile, trip characteristics, and stay conditions influenced the use of HSR services on visits to each coastal destination...
2017: PloS One
https://www.readbyqxmd.com/read/28644877/patient-experienced-burden-of-treatment-in-patients-with-multimorbidity-a-systematic-review-of-qualitative-data
#6
Michael Rosbach, John Sahl Andersen
OBJECTIVE: To synthesize existing qualitative literature on patient-experienced burden of treatment in multimorbid patients. METHODS: A literature search identified available qualitative studies on the topic of burden of treatment in multimorbidity and meta-ethnography was applied as method. The authors' original findings were preserved, but also synthesized to new interpretations to investigate the concept of the burden of treatment using the Cumulative Complexity Model...
2017: PloS One
https://www.readbyqxmd.com/read/28644842/investigation-of-discriminant-metabolites-in-tamoxifen-resistant-and-choline-kinase-alpha-downregulated-breast-cancer-cells-using-1h-nuclear-magnetic-resonance-spectroscopy
#7
Hoe Suk Kim, Lianji Tian, Hyeonjin Kim, Woo Kyung Moon
Metabolites linked to changes in choline kinase-α (CK-α) expression and drug resistance, which contribute to survival and autophagy mechanisms, are attractive targets for breast cancer therapies. We previously reported that autophagy played a causative role in driving tamoxifen (TAM) resistance of breast cancer cells (BCCs) and was also promoted by CK-α knockdown, resulting in the survival of TAM-resistant BCCs. There is no comparative study yet about the metabolites resulting from BCCs with TAM-resistance and CK-α knockdown...
2017: PloS One
https://www.readbyqxmd.com/read/28644830/optimal-chemotactic-responses-in-stochastic-environments
#8
Martin Godány, Bhavin S Khatri, Richard A Goldstein
Although the "adaptive" strategy used by Escherichia coli has dominated our understanding of bacterial chemotaxis, the environmental conditions under which this strategy emerged is still poorly understood. In this work, we study the performance of various chemotactic strategies under a range of stochastic time- and space-varying attractant distributions in silico. We describe a novel "speculator" response in which the bacterium compare the current attractant concentration to the long-term average; if it is higher then they tumble persistently, while if it is lower than the average, bacteria swim away in search of more favorable conditions...
2017: PloS One
https://www.readbyqxmd.com/read/28644818/fabrication-and-optical-properties-of-nanostructured-plasmonic-al2o3-au-al2o3-al2o3-metamaterials
#9
Hicham Bakkali, Eduardo Blanco, Manuel Dominguez, Jose S Garitaonandia
Discontinuous multilayer (DML) thin films, which consist of nano-granular metals (NGMs) embedded in a dielectric matrix, have attracted significant interest as engineered plasmonic metamaterials. In this study, a systematic layer-by-layer deposition of three-dimensional sub-wavelength periodic plasmonic DML structures via the radio frequency sputtering of a composite target has been reported. The overall optical response of the DML films composed of AuAl2O3 NGM homogenous layers, which are periodically sandwiched between two amorphous Al2O3 layers, are studied using reflection spectroscopic ellipsometry and transmission spectroscopy techniques...
June 23, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28644665/giant-paramagnetism-induced-valley-polarization-of-electrons-in-charge-tunable-monolayer-mose_-2
#10
Patrick Back, Meinrad Sidler, Ovidiu Cotlet, Ajit Srivastava, Naotomo Takemura, Martin Kroner, Atac Imamoğlu
For applications exploiting the valley pseudospin degree of freedom in transition metal dichalcogenide monolayers, efficient preparation of electrons or holes in a single valley is essential. Here, we show that a magnetic field of 7 T leads to a near-complete valley polarization of electrons in a MoSe_{2} monolayer with a density 1.6×10^{12}  cm^{-2}; in the absence of exchange interactions favoring single-valley occupancy, a similar degree of valley polarization would have required a pseudospin g factor of 38...
June 9, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28644648/crossing-over-from-attractive-to-repulsive-interactions-in-a-tunneling-bosonic-josephson-junction
#11
G Spagnolli, G Semeghini, L Masi, G Ferioli, A Trenkwalder, S Coop, M Landini, L Pezzè, G Modugno, M Inguscio, A Smerzi, M Fattori
We explore the interplay between tunneling and interatomic interactions in the dynamics of a bosonic Josephson junction. We tune the scattering length of an atomic ^{39}K Bose-Einstein condensate confined in a double-well trap to investigate regimes inaccessible to other superconducting or superfluid systems. In the limit of small-amplitude oscillations, we study the transition from Rabi to plasma oscillations by crossing over from attractive to repulsive interatomic interactions. We observe a critical slowing down in the oscillation frequency by increasing the strength of an attractive interaction up to the point of a quantum phase transition...
June 9, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28644611/transient-fiber-mats-of-electrospun-poly-propylene-carbonate-composites-with-remarkable-mechanical-strength
#12
Peter Ohlendorf, Alexander Ruyack, Amanda K Leonardi, Chengjian Shi, Christine Cuppoletti, Ian Bruce, Amit Lal, Christopher K Ober
Polymers with a triggered decomposition are attractive for an array of applications ranging from patterning to transient packaging materials as well as for environmental protection. This work showed for the first time UV and thermally triggered transience in fiber mats using poly(propylene carbonate) (PPC) composites. The electrospun PPC-composite fiber mats combine excellent decomposition performance (due to the high surface to volume ratio) with high stiffness and thus represent a new class of materials enabling innovative applications such as transient filter materials, short-time plant protection materials as well as temporary lightweight materials for aerospace engineering...
June 23, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28644580/a-free-ride-an-analysis-of-the-association-of-casino-bus-tours-and-problem-gambling-among-older-adults
#13
Mark van der Maas, Robert E Mann, Flora I Matheson, Nigel E Turner, Hayley A Hamilton, John McCready
BACKGROUND AND AIMS: Little research has examined the relationship between incentives used by gambling venues to attract customers and the experience of gambling related harm. Organized and subsidized bus tours are a common example of such incentives. The aim of this study was to examine whether bus tour patronage was associated with increased odds of problem gambling among older adults. This study also compared rates of bus tour use by sociodemographic characteristics and gambling behaviours...
June 23, 2017: Addiction
https://www.readbyqxmd.com/read/28644540/cytokeratin-19-expression-in-early-oral-squamous-cell-carcinoma-and-their-metastasis-inadequate-biomarker-for-one-step-nucleic-acid-amplification-implementation-in-sentinel-lymph-node-biopsy-procedure
#14
Rob Noorlag, Robert J J van Es, Remco de Bree, Stefan M Willems
BACKGROUND: Intraoperative analysis of lymph nodes during a sentinel lymph node biopsy (SLNB) procedure could result in one-step surgery for early oral squamous cell carcinoma (OSCC) with an occult nodal metastasis. One-step nucleic acid amplification rapidly detects cytokeratin 19 (CK19) RNA with high accuracy. Sensitivity and specificity of CK19 expression in OSCC was evaluated. METHODS: Immunohistochemical CK19 expression was done in 207 patients with OSCC with 65 cases of paired nodal metastases...
June 23, 2017: Head & Neck
https://www.readbyqxmd.com/read/28644506/reduced-graphene-oxide-coated-porous-carbon-sulfur-nanofiber-as-a-flexible-paper-electrode-for-lithium-sulfur-batteries
#15
R X Chu, J Lin, C Q Wu, J Zheng, Y L Chen, J Zhang, R H Han, Y Zhang, H Guo
Lithium-sulfur (Li-S) batteries have attracted great attention owing to their excellent electrochemical properties, such as the high discharge voltage of 2.3 V, specific capacity of 1675 mA h g(-1) and energy density of 2600 Wh kg(-1). The widely used slurry made electrodes of Li-S batteries are plagued by the serious shuttle effect and insulating nature of sulfur. Herein, a reduced graphene oxide coated porous carbon nanofiber flexible paper (rGO@S-PCNP) was fabricated and directly used as an additive-free cathode for Li-S batteries...
June 23, 2017: Nanoscale
https://www.readbyqxmd.com/read/28644424/the-indirect-efficacy-comparison-of-dna-methylation-in-sputum-for-early-screening-and-auxiliary-detection-of-lung-cancer-a-meta-analysis
#16
REVIEW
Di Liu, Hongli Peng, Qi Sun, Zhongyao Zhao, Xinwei Yu, Siqi Ge, Hao Wang, Honghong Fang, Qing Gao, Jiaonan Liu, Lijuan Wu, Manshu Song, Youxin Wang
BACKGROUND: DNA methylation in sputum has been an attractive candidate biomarker for the non-invasive screening and detection of lung cancer. MATERIALS AND METHODS: Databases including PubMed, Ovid, Cochrane library, Web of Science databases, Chinese Biological Medicine (CBM), Chinese National Knowledge Infrastructure (CNKI), Wanfang, Vip Databases and Google Scholar were searched to collect the diagnostic trials on aberrant DNA methylation in the screening and detection of lung cancer published until 1 December 2016...
June 23, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28644020/the-underestimated-halogen-bonds-forming-with-protein-backbone-in-protein-data-bank
#17
Qian Zhang, Zhijian Xu, Jiye Shi, Weiliang Zhu
Halogen bonds (XBs) are attracting increasing attention in biological systems. Protein Data Bank (PDB) archives experimentally determined XBs in biological macromolecules. However, no software for structure refinement in X-Ray crystallography takes into account of XBs, which might result in the weakening or even vanishing of experimentally determined XBs in PDB. In our previous study, we showed that side-chain XBs forming with protein side chains are underestimated in PDB on the basis of the phenomenon that the proportion of side-chain XBs to overall XBs decreases as structural resolution becomes lower and lower...
June 23, 2017: Journal of Chemical Information and Modeling
https://www.readbyqxmd.com/read/28644009/multi-harmonic-imaging-in-the-second-near-infrared-window-of-nanoparticle-labeled-stem-cells-as-monitoring-tool-in-tissue-depth
#18
Laurence Dubreil, Isabelle Leroux, Mireille Ledevin, Cindy Schleder, Lydie Lagalice, Claire Lovo, Romain Fleurisson, Solène Passemard, Vasyl Kilin, Sandrine Gerber-Lemaire, Marie-Anne Colle, Luigi Bonacina, Karl Rouger
In order to assess the therapeutic potential of cell-based strategies, it is of paramount importance to elaborate and validate tools for monitoring the behavior of injected cells in terms of tissue dissemination and engraftment properties. Here, we apply Bismuth Ferrite harmonic nanoparticles (BFO HNPs) to \textit{in vitro} expanded human skeletal muscle-derived stem cells (hMuStem cells), an attractive therapeutic avenue for patients suffering from Duchenne Muscular Dystrophy (DMD). We demonstrate the possibility of stem cell labeling with HNPs...
June 23, 2017: ACS Nano
https://www.readbyqxmd.com/read/28643693/generation-mechanism-of-negative-permittivity-and-kramers-kronig-relations-in-batio-sub-3-sub-y-sub-3-sub-fe-sub-5-sub-o-sub-12-sub-multiferroic-composites
#19
Zhongyang Wang, Kai Sun, Peitao Xie, Yao Liu, Runhua Fan
Recently, negative parameters such as negative permittivity and negative permeability are attracting extensive attention for their unique electromagnetic properties. Usually, negative permittivity is well achieved by plasma oscillation of free electrons in conductor-insulator composites or metamaterials, while some attention has been drawn to attaining the negative permittivity in ceramics to reduce the dielectric loss. In this paper, negative permittivity in barium titanate and yttrium iron garnet composites was reported which was well fitted by Lorentz model...
June 23, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28643559/informing-healthcare-waiting-area-design-using-transparency-attributes-a-comparative-preference-study
#20
Shan Jiang, Matthew Powers, David Allison, Ellen Vincent
OBJECTIVE: This study aimed to explore people's visual preference for waiting areas in general hospital environments designed with transparency attributes that fully integrate nature. BACKGROUND: Waiting can be a tedious and frustrating experience among people seeking healthcare treatments and negatively affect their perception of the quality of care. Positive distractions and supportive designs have gained increasing attraction to improve people's waiting experience...
July 2017: HERD
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