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https://www.readbyqxmd.com/read/28092833/study-of-molecular-interactions-between-chitosan-and-vi-antigen
#1
Natália de Farias Silva, Raimundo Lopes da Silva, Kalene de Oliveira Almeida, Antônio Edilson Sousa do Nascimento-Júnior, Davi do Socorro Barros Brasil, José Otávio Carréra Silva-Júnior, Francisco Martins Teixeira, Roseane Maria Ribeiro-Costa
Chitosan has attracted much interest due to its special physical and chemical properties related to drug administration. Nanoparticles delivery systems from Vi Antigen are a promising approach in the struggle against typhoid fever. In this paper, we reported the obtainment and the characterization of Vi Antigen by Infrared spectroscopy as well as Molecular Modeling and Computational Chemistry studies of the Chitosan-Vi Antigen interaction through theoretical models. The results of the theoretical and experimental Infrared spectroscopy showed important bands related to N-Acetyl and O-Acetyl groups present in Vi Antigen...
December 31, 2016: Journal of Molecular Graphics & Modelling
https://www.readbyqxmd.com/read/28092805/circumstantial-evidence-of-life-history-events-in-loricate-choanoflagellates
#2
Helge Abildhauge Thomsen, Jette Buch Østergaard
Sex is found in all major eukaryotic groups of organisms. It has been known for some time that the choanoflagellates also possess the genes involved in meiosis and a full sexual cycle was also recently accounted for in Salpingoeca rosetta. With reference to the loricate choanoflagellates the current status is that only circumstantial evidence, from wild material of Bicosta spinifera, exists in favour of documenting division patterns that go beyond plain asexual division, and that has the potential to represent stages in a sexual life cycle...
December 27, 2016: European Journal of Protistology
https://www.readbyqxmd.com/read/28092791/minor-physical-anomalies-in-bipolar-i-and-bipolar-ii-disorders-results-with-the-m%C3%A3-hes-scale
#3
Hajnalka Berecz, Györgyi Csábi, Sára Jeges, Róbert Herold, Maria Simon, Tamás Halmai, Dániel Trixler, András Hajnal, Ákos Levente Tóth, Tamás Tényi
Minor physical anomalies (MPAs) are external markers of abnormal brain development, so the more common appearence of these signs among bipolar I and bipolar II patients can confirm the possibility of a neurodevelopmental deficit in these illnesses. The aim of the present study was to investigate the rate and topological profile of minor physical anomalies in patients with bipolar I and - first in literature - with bipolar II disorders compared to matched healthy control subjects. Using a list of 57 minor physical anomalies (the Méhes Scale), 30 bipolar I and 30 bipolar II patients, while as a comparison 30 matched healthy control subjects were examined...
January 5, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28092790/comparison-of-quality-of-life-in-homeless-and-non-homeless-chinese-patients-with-psychiatric-disorders
#4
Xiao-Lan Cao, Yan-Nan Fu, Fu-Jun Jia, Helen F K Chiu, Gabor S Ungvari, Chee H Ng, Cai-Lan Hou, Yong-Qiang Lin, Xiao-Bin Zhong, Xiang-Min Liu, Larina C L Yim, Yu-Tao Xiang
To date, there are no data on quality of life (QOL) and its correlates in homeless Chinese patients with psychiatric disorders. This study aimed to compare QOL between homeless and non-homeless patients with psychiatric disorders in China. A total of 278 homeless and 222 non-homeless patients matched in age and gender were consecutively recruited. Socio-demographic and clinical data were collected from medical records. A clinical interview was conducted using standardized instruments. The physical and mental QOL in both groups were lower than the normative data for Chinese general population, but there was no significant difference in any QOL domain between the two groups...
January 6, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28092777/controlling-the-3d-architecture-of-self-lifting-auto-generated-tissue-equivalents-slates-for-optimized-corneal-graft-composition-and-stability
#5
Ricardo M Gouveia, Elena González-Andrades, Juan C Cardona, Carmen González-Gallardo, Ana M Ionescu, Ingrid Garzon, Miguel Alaminos, Miguel González-Andrades, Che J Connon
Ideally, biomaterials designed to play specific physical and physiological roles in vivo should comprise components and microarchitectures analogous to those of the native tissues they intend to replace. For that, implantable biomaterials need to be carefully designed to have the correct structural and compositional properties, which consequently impart their bio-function. In this study, we showed that the control of such properties can be defined from the bottom-up, using smart surface templates to modulate the structure, composition, and bio-mechanics of human transplantable tissues...
December 23, 2016: Biomaterials
https://www.readbyqxmd.com/read/28092766/effect-of-multi-walled-carbon-nanotubes-on-phytotoxicity-of-sediments-contaminated-by-phenanthrene-and-cadmium
#6
Biao Song, Guangming Zeng, Jilai Gong, Peng Zhang, Jiaqin Deng, Canhui Deng, Jin Yan, Piao Xu, Cui Lai, Chen Zhang, Min Cheng
To implement effective control and abatement programs for contaminants accumulating in sediments, strategies are needed for evaluating the quality of amended sediments. In this study, phytotoxicity of the sediments contaminated by cadmium and phenanthrene was evaluated after in situ remediation with multi-walled carbon nanotubes (MWCNTs) as adsorbents. Adsorption experiments and measurement of aqueous concentrations of the contaminants in overlying water were used to investigate the remediation effectiveness from physical and chemical aspects...
January 9, 2017: Chemosphere
https://www.readbyqxmd.com/read/28092727/sitting-ducks-face-chronic-disease-an-analysis-of-newspaper-coverage-of-sedentary-behaviour-as-a-health-issue-in-australia-2000-2012
#7
Josephine Y Chau, Catriona Bonfiglioli, Amy Zhong, Zeljko Pedisic, Michelle Daley, Bronwyn McGill, Adrian Bauman
Issue addressed: This study examines how sedentary behaviour (too much sitting) was covered as a health issue by Australian newspapers and how physical activity was framed within this newspaper coverage.Methods: Articles featuring sedentary behaviour published in Australian newspapers between 2000 and 2012 were analysed for content and framing. Main outcome measures were volume, number and content of newspaper articles; framing and types of sedentary behaviour; responsibility for the problem of and solutions to high levels of sedentary behaviour; and physical activity mentions and how it was framed within sedentary behaviour coverage...
January 12, 2017: Health Promotion Journal of Australia
https://www.readbyqxmd.com/read/28092643/physical-activity-and-sedentary-time-among-children-with-disabilities-at-school
#8
Cindy H P Sit, Thomas L McKenzie, Ester Cerin, Bik C Chow, Wendy Y Huang, Jie Yu
PURPOSES: Physical activity (PA) is important for the development of children with disabilities, but rarely does this population meet the recommended standards. Schools are salient locations for PA, but little is known about how specific school settings affect the PA of children with diverse disabilities. We assessed PA and sedentary time (ST) of children with disabilities in three school settings (physical education, recess, lunchtime). METHODS: Participants included 259 children from 13 Hong Kong special schools for five primary disabilities: visual impairments, hearing impairments, physical disabilities, intellectual disabilities, and social development problems...
February 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28092636/an-analysis-of-intrinsic-variations-of-low-frequency-shear-wave-speed-in-a-stochastic-tissue-model-the-first-application-for-staging-liver-fibrosis
#9
Yu Wang, Min Wang, Jingfeng Jiang
Shear wave elastography is increasingly being used to non-invasively stage liver fibrosis by measuring shear wave speed (SWS). This study quantitatively investigates intrinsic variations among SWS measurements obtained from heterogeneous media such as fibrotic livers. More specifically, it aims to demonstrate that intrinsic variations in SWS measurements, in general, follow a non-Gaussian distribution and are related to the heterogeneous nature of the medium being measured. Using the principle of maximum entropy (ME), our primary objective is to derive a probability density function (PDF) of the SWS distribution in conjunction with a lossless stochastic tissue model...
February 7, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28092581/an-integrated-maximum-current-density-approach-for-noninvasive-detection-of-myocardial-infarction
#10
Chen Zhao, Shiqin Jiang, Yanhua Wu, Junjie Zhu, Dafang Zhou, Birgit Hailer, Dietrich Gronemeyer, Peter Van Leeuwen
We present a new approach of integrated maximum current density (IMCD) for the noninvasive detection of myocardial infarction (MI) using magnetocardiography (MCG) data acquired from a superconducting quantum interference device (SQUID) system. In this study, we investigated the relationship of the maximum current density (MCD) in the current density map and the underlying equivalent current dipole (ECD) based on a novel method of reconstructing the ECD in the extremum circle of the magnetic field map. The performance of IMCD and the integrated ECD (IECD) approaches were also evaluated by using 61-channel MCG data from 39 healthy subjects and 102 patients with ST elevation myocardial infarction (STEMI)...
January 9, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28092550/-l_0-gradient-projection
#11
Shunsuke Ono
Minimizing L0 gradient, the number of the nonzero gradients of an image, together with a quadratic datafidelity to an input image has been recognized as a powerful edge-preserving filtering method. However, the L0 gradient minimization has an inherent difficulty: a user-given parameter controlling the degree of flatness does not have a physical meaning since the parameter just balances the relative importance of the L0 gradient term to the quadratic data-fidelity term. As a result, the setting of the parameter is a troublesome work in the L0 gradient minimization...
January 11, 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/28092504/wall-shear-rate-measurement-validation-of-a-new-method-through-multiphysics-simulations
#12
Stefano Ricci, Abigail Swillens, Alessandro Ramalli, Patrick Segers, Piero Tortoli
Wall shear stress is known to affect the vessel endothelial function and to be related to important pathologies like the development of atherosclerosis. It is defined as the product of the blood viscosity by the blood velocity gradient at the wall position, i.e., the wall shear rate (WSR). The WSR measurement is particularly challenging in important cardiovascular sites, like the carotid bifurcation, because of the related complex flow configurations characterized by high spatial and temporal gradients, wall movement, and clutter noise...
January 2017: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28092503/propagation-modeling-and-analysis-of-molecular-motors-in-molecular-communication
#13
Youssef Chahibi, Ian F Akyildiz, Ilangko Balasingham
Molecular motor networks (MMNs) are networks constructed from molecular motors to enable nanomachines to perform coordinated tasks of sensing, computing, and actuation at the nano- and micro- scales. Living cells are naturally enabled with this same mechanism to establish point-to-point communication between different locations inside the cell. Similar to a railway system, the cytoplasm contains an intricate infrastructure of tracks, named microtubules, interconnecting different internal components of the cell...
December 2016: IEEE Transactions on Nanobioscience
https://www.readbyqxmd.com/read/28092492/self-care-in-palliative-care-nursing-and-medical-professionals-a-cross-sectional-survey
#14
Jason Mills, Timothy Wand, Jennifer A Fraser
BACKGROUND: Self-care is an important consideration for palliative care professionals. To date, few details have been recorded about the nature or uptake of self-care practices in the palliative care workforce. As part of a broader mixed methods study, this article reports findings from a national survey of nurses and doctors. OBJECTIVE: The objective of this study was to examine perceptions, education, and practices relating to self-care among palliative care nursing and medical professionals...
January 16, 2017: Journal of Palliative Medicine
https://www.readbyqxmd.com/read/28092464/expectations-for-treatment-in-pediatric-weight-management-and-relationship-to-attrition
#15
Erinn T Rhodes, Richard E Boles, Kimberly Chin, Amy Christison, Elizabeth Getzoff Testa, Kimberly Guion, Mary Jane Hawkins, Carter R Petty, Bethany Sallinen Gaffka, Melissa Santos, Laura Shaffer, Jared Tucker, Sarah E Hampl
BACKGROUND: Attrition in pediatric weight management negatively impacts treatment outcomes. A potentially modifiable contributor to attrition is unmet family expectations. This study aimed to evaluate the association between adolescent and parent/guardian treatment expectations and attrition. PATIENTS AND METHODS: A prospective, nonrandomized, uncontrolled, single-arm pilot trial was conducted among 12 pediatric weight management programs in the Children's Hospital Association's FOCUS on a Fitter Future collaborative...
January 16, 2017: Childhood Obesity
https://www.readbyqxmd.com/read/28092457/insulin-sensitivity-and-inflammation-mediate-the-impact-of-fitness-on-cerebrovascular-health-in-adolescents
#16
Po Lai Yau, Naima Ross, Andrew Tirsi, Arslan Arif, Zeynep Ozinci, Antonio Convit
BACKGROUND/OBJECTIVES: To investigate in adolescents the relationships between retinal vessel diameter, physical fitness, insulin sensitivity, and systemic inflammation. METHODS: We evaluated 157 adolescents, 112 with excessive weight and 45 lean, all without type 2 diabetes mellitus. All received detailed evaluations, including measurements of retinal vessel diameter, insulin sensitivity, levels of inflammation, and physical fitness. RESULTS: Overweight/obese adolescents had significantly narrower retinal arteriolar and wider venular diameters, significantly lower insulin sensitivity, and physical fitness...
January 16, 2017: Childhood Obesity
https://www.readbyqxmd.com/read/28092430/optimal-reactivity-and-improved-self-healing-capability-of-structurally-dynamic-polymers-grafted-on-janus-nanoparticles-governed-by-chain-stiffness-and-spatial-organization
#17
Guoxi Xu, Zihan Huang, Pengyu Chen, Tianqi Cui, Xinghua Zhang, Bing Miao, Li-Tang Yan
Structurally dynamic polymers are recognized as a key potential to revolutionize technologies ranging from design of self-healing materials to numerous biomedical applications. Despite intense research in this area, optimizing reactivity and thereby improving self-healing ability at the most fundamental level pose urgent issue for wider applications of such emerging materials. Here, the authors report the first mechanistic investigation of the fundamental principle for the dependence of reactivity and self-healing capabilities on the properties inherent to dynamic polymers by combining large-scale computer simulation, theoretical analysis, and experimental discussion...
January 16, 2017: Small
https://www.readbyqxmd.com/read/28092391/correlation-of-focal-adhesion-assembly-and-disassembly-with-cell-migration-on-nanotopography
#18
Elena I Liang, Emma J Mah, Albert F Yee, Michelle A Digman
Selective cell adhesion is desirable to control cell growth and migration on biomedical implants. Mesenchymal cell migration is regulated through focal adhesions (FAs) and can be modulated by their microenvironment, including changes in surface topography. We use the Number and Molecular Brightness (N&B) imaging analysis to provide a unique perspective on FA assembly and disassembly. This imaging analysis generates a map of real-time fluctuations of protein monomers, dimers, and higher order aggregates of FA proteins, such as paxillin during assembly and disassembly...
January 16, 2017: Integrative Biology: Quantitative Biosciences From Nano to Macro
https://www.readbyqxmd.com/read/28092296/qualitative-analysis-of-parental-observations-on-quality-of-life-in-australian-children-with-down-syndrome
#19
Nada Murphy, Amy Epstein, Helen Leonard, Elise Davis, Dinah Reddihough, Andrew Whitehouse, Peter Jacoby, Jenny Bourke, Katrina Williams, Jenny Downs
OBJECTIVE: There are many challenges to health, functioning, and participation for children with Down syndrome; yet, the quality-of-life (QOL) domains important for this group have never been clearly articulated. This study investigated parental observations to identify QOL domains in children with Down syndrome and determined whether domains differed between children and adolescents. METHODS: The sample comprised 17 families whose child with Down syndrome was aged 6 to 18 years...
January 12, 2017: Journal of Developmental and Behavioral Pediatrics: JDBP
https://www.readbyqxmd.com/read/28092277/hierarchical-linear-modeling-for-analysis-of-ecological-momentary-assessment-data-in-physical-medicine-and-rehabilitation-research
#20
Lauren Terhorst, Kelly Battle Beck, Ashlee B McKeon, Kristin M Graham, Feifei Ye, Saul Shiffman
Ecological momentary assessment (EMA) methods collect real-time data in real-world environments, which allow physical medicine and rehabilitation researchers to examine objective outcome data and reduces bias from retrospective recall. The statistical analysis of EMA data is directly related to the research question and the temporal design of the study. Hierarchical linear modeling, which accounts for multiple observations from the same participant, is a particularly useful approach to analyzing EMA data. The objective of this paper was to introduce the process of conducting hierarchical linear modeling analyses with EMA data...
January 13, 2017: American Journal of Physical Medicine & Rehabilitation
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