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https://www.readbyqxmd.com/read/28549340/a-critical-assessment-of-the-in-vitro-measurement-of-cortical-bone-stiffness-with-ultrasound
#1
L Peralta, X Cai, P Laugier, Q Grimal
Elasticity assessment based on bulk wave velocity (BWV) measurements is the most popular technique to characterize the anisotropic stiffness tensor in cortical bone. Typically, a cuboid bone specimen is cut with its sides along the different anatomical directions. Then, the velocity of shear and longitudinal waves propagating along different directions are assessed, from which stiffness coefficients are calculated. Despite the importance of obtaining accurate elasticity values for bone research, there is no generally accepted protocol to measure BWV and the precision of the technique has been seldom investigated...
May 19, 2017: Ultrasonics
https://www.readbyqxmd.com/read/28549321/studies-on-free-radical-scavenging-cancer-cell-antiproliferation-and-calf-thymus-dna-interaction-of-schiff-bases
#2
Cleiton M da Silva, Marina M Silva, Fabiano S Reis, Ana Lúcia T G Ruiz, João E de Carvalho, Josué C C Santos, Isis M Figueiredo, Rosemeire B Alves, Luzia V Modolo, Ângelo de Fátima
Thirty-nine Schiff bases were synthesized by performing microwave-assisted condensation of the corresponding aldehydes and aromatic amines. Their reactive nitrogen species (RNS) scavenging activity and inhibitory effects against cancer cell growth were then subsequently investigated. Additionally, the interaction between the calf thymus DNA (ctDNA) and selected Schiff bases was evaluated using fluorescence spectroscopy, and their binding parameters were determined. The yields of the various compounds ranged from moderate to excellent (43-99%) after only a 2-min reaction...
May 17, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28549310/segmentation-of-lumen-and-outer-wall-of-abdominal-aortic-aneurysms-from-3d-black-blood-mri-with-a-registration-based-geodesic-active-contour-model
#3
Yan Wang, Florent Seguro, Evan Kao, Yue Zhang, Farshid Faraji, Chengcheng Zhu, Henrik Haraldsson, Michael Hope, David Saloner, Jing Liu
Segmentation of the geometric morphology of abdominal aortic aneurysm is important for interventional planning. However, the segmentation of both the lumen and the outer wall of aneurysm in magnetic resonance (MR) image remains challenging. This study proposes a registration based segmentation methodology for efficiently segmenting MR images of abdominal aortic aneurysms. The proposed methodology first registers the contrast enhanced MR angiography (CE-MRA) and black-blood MR images, and then uses the Hough transform and geometric active contours to extract the vessel lumen by delineating the inner vessel wall directly from the CE-MRA...
May 19, 2017: Medical Image Analysis
https://www.readbyqxmd.com/read/28549250/the-clinical-communication-and-information-challenges-associated-with-the-psychosexual-aspects-of-prostate-cancer-treatment
#4
Susan A Speer, Samantha R Tucker, Rebecca McPhillips, Sarah Peters
RATIONALE: Prostate cancer and its treatment have significant sexual side effects that necessitate timely patient information and open communication with healthcare professionals. However, very little is known about men's experiences of talking to clinicians about the psychosexual difficulties associated with the disease. OBJECTIVE: This study aims to advance understanding of men's perceptions of the communication and information challenges associated with the psychosexual aspects of prostate cancer and its treatment...
May 18, 2017: Social Science & Medicine
https://www.readbyqxmd.com/read/28549245/analysis-of-heart-rate-variability-and-risk-factors-for-sudep-in-patients-with-drug-resistant-epilepsy
#5
Leyla Baysal-Kirac, Nail Güven Serbest, Erdi Şahin, Hava Özlem Dede, Candan Gürses, Ayşen Gökyiğit, Nerses Bebek, Ahmet Kaya Bilge, Betül Baykan
BACKGROUND: Cardiac problems have been suggested as causes of sudden unexpected death in epilepsy (SUDEP). Our aim was to investigate possible associations of cardiac autonomic functions based on heart rate variability (HRV) parameters with risk factors of SUDEP in patients with drug-resistant epilepsy. METHODS: Forty-seven patients with drug-resistant seizures and 45 healthy control subjects were enrolled in the study. Interictal time domain parameters of HRV were evaluated with 24-hour Holter recordings...
May 23, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28549233/processing-the-papal-encyclical-through-perceptual-filters-pope-francis-identity-protective-cognition-and-climate-change-concern
#6
Asheley R Landrum, Robert B Lull, Heather Akin, Ariel Hasell, Kathleen Hall Jamieson
Previous research suggests that when individuals encounter new information, they interpret it through perceptual 'filters' of prior beliefs, relevant social identities, and messenger credibility. In short, evaluations are not based solely on message accuracy, but also on the extent to which the message and messenger are amenable to the values of one's social groups. Here, we use the release of Pope Francis's 2015 encyclical as the context for a natural experiment to examine the role of prior values in climate change cognition...
May 23, 2017: Cognition
https://www.readbyqxmd.com/read/28549209/genotypic-correlation-and-path-analysis-in-early-and-super-early-maize-genotypes
#7
B M Alves, A Cargnelutti Filho
The aims of this study were to assess the linear relationships between agronomic and nutritional traits and to identify promising traits for indirect selection in early and super-early maturing maize genotypes. Two trials were run in the 2009/2010 agricultural year, each consisting of a randomized block design with three replications. One trial was run on 36 early maturing maize genotypes and the other on 22 super-early maturing genotypes. Six agronomic traits, 11 protein-nutritional traits, and four energetic-nutritional traits were measured...
May 25, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28549170/are-multidimensional-pain-inventory-coping-strategy-profiles-associated-with-long-term-spinal-cord-stimulation-effectiveness
#8
Mery Paroli, Olivia Bernini, Giuliano De Carolis, Lara Tollapi, Franca Bondi, Antonella Martini, Alessandro Dario, Adriana Paolicchi
Introduction.:  It is acknowledged that the way patients cope with pain may influence treatment outcome. In particular, psychological factors are deemed important when considering patients for suitability for spinal cord stimulation (SCS). Objective.:  The aim of the study is to observe how pre-implantation psychological characteristics impact the effectiveness of SCS for chronic pain. Methods.:  The analysis comprised data from 137 patients who underwent an SCS implant...
May 26, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/28549064/chemomechanical-regulation-of-myosin-ic-cross-bridges-deducing-the-elastic-properties-of-an-ensemble-from-single-molecule-mechanisms
#9
Florian Berger, A J Hudspeth
Myosin Ic is thought to be the principal constituent of the motor that adjusts mechanical responsiveness during adaptation to prolonged stimuli by hair cells, the sensory receptors of the inner ear. In this context myosin molecules operate neither as filaments, as occurs in muscles, nor as single or few molecules, as characterizes intracellular transport. Instead, myosin Ic molecules occur in a complex cluster in which they may exhibit cooperative properties. To better understand the motor's remarkable function, we introduce a theoretical description of myosin Ic's chemomechanical cycle based on experimental data from recent single-molecule studies...
May 26, 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28549010/a-clinical-feasibility-trial-for-identification-of-exceptional-responders-in-whom-breast-cancer-surgery-can-be-eliminated-following-neoadjuvant-systemic-therapy
#10
Henry M Kuerer, Gaiane M Rauch, Savitri Krishnamurthy, Beatriz E Adrada, Abigail S Caudle, Sarah M DeSnyder, Dalliah M Black, Lumarie Santiago, Brian P Hobbs, Anthony Lucci, Michael Gilcrease, Rosa F Hwang, Rosalind P Candelaria, Mariana Chavez-MacGregor, Benjamin D Smith, Elsa Arribas, Tanya Moseley, Mediget Teshome, Makesha V Miggins, Vicente Valero, Kelly K Hunt, Wei T Yang
OBJECTIVE: To determine the accuracy of fine-needle aspiration (FNA) and vacuum-assisted core biopsy (VACB) in assessing the presence of residual cancer in the breast after neoadjuvant systemic therapy (NST). SUMMARY BACKGROUND DATA: Pathologic complete response (pCR) rates after NST have improved dramatically, suggesting that surgery might be avoided in some patients. Safe avoidance of surgery would require accurate confirmation of no residual invasive/in situ carcinoma...
May 25, 2017: Annals of Surgery
https://www.readbyqxmd.com/read/28548947/evaluation-of-cumulative-prognostic-score-based-on-pretreatment-plasma-fibrinogen-and-serum-albumin-levels-in-patients-with-newly-diagnosed-high-grade-gliomas
#11
Zhen-Qiang He, Hao Duan, Chao Ke, Xiang-Heng Zhang, Cheng-Cheng Guo, Fuad Al-Nahari, Ji Zhang, Zheng-He Chen, Yin-Sheng Chen, Zhi-Gang Liu, Jian Wang, Zhong-Ping Chen, Xiao-Bing Jiang, Yong-Gao Mou
This retrospective study was designed to determine the prognostic value of a cumulative score (FA score) based on pretreatment plasma fibrinogen and serum albumin levels for 326 patients newly diagnosed high-grade glioma (HGG). Receiver operating characteristic (ROC) curve analysis was performed to determine the optimal cut-off values. Univariate and multivariate analysis were performed to evaluate the independent prognostic value of the FA scores associated with overall survival (OS) and progression-free survival (PFS)...
May 13, 2017: Oncotarget
https://www.readbyqxmd.com/read/28548908/effect-of-end-segment-on-physicochemical-properties-and-platelet-compatibility-of-poly-propylene-glycol-initiated-poly-methyl-methacrylate
#12
Chihiro Fukuda, Chie Yahata, Takuya Kinoshita, Takafumi Watanabe, Hideo Tsukamoto, Akira Mochizuki
It is well known that polyether-based copolymers have good blood compatibility, although many mechanisms have been proposed to explain their favorable performance. Our objective in carrying out the present study was to obtain a better understanding of the effect of the (poly)ether segment on blood compatibility. Therefore, we synthesized poly(propylene glycol) (PPG)-based initiators for atom transfer polymerization, where the number of propylene glycol (PG) units in the PPG (Pn(PG) was varied from 1 to 94. Methyl methacrylate (MMA) was polymerized using the initiators, resulting in the formation of polyMMAs with a PG-based ether part at the polymer terminal...
May 26, 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/28548893/dynamic-decision-making-learning-processes-and-new-research-directions
#13
Cleotilde Gonzalez, Pegah Fakhari, Jerome Busemeyer
OBJECTIVE: The aim of this manuscript is to provide a review of contemporary research and applications on dynamic decision making (DDM). BACKGROUND: Since early DDM studies, there has been little systematic progress in understanding decision making in complex, dynamic systems. Our review contributes to better understanding of decision making processes in dynamic tasks. METHOD: We discuss new research directions in DDM to highlight the value of simplification in the study of complex decision processes, divided into experimental and theoretical/computational approaches, and focus on problems involving control tasks and search-and-choice tasks...
May 1, 2017: Human Factors
https://www.readbyqxmd.com/read/28548833/structure-activity-relationship-for-small-molecule-inhibitors-of-nicotinamide-n-methyltransferase
#14
Harshini Neelakantan, Hua-Yu Wang, Virginia Vance, Jonathan D Hommel, Stanton F McHardy, Stanley J Watowich
Nicotinamide N-methyltransferase (NNMT) is a fundamental cytosolic biotransforming enzyme that catalyzes the N-methylation of endogenous and exogenous xenobiotics. We have identified small molecule inhibitors of NNMT with >1000-fold range of activity and developed comprehensive structure-activity relationships (SARs) for NNMT inhibitors. Screening of N-methylated quinolinium, isoquinolinium, pyrididium, and benzimidazolium/benzothiazolium analogs resulted in the identification of quinoliniums as a promising scaffold with very low micromolar (IC50 ~1 μM) NNMT inhibition...
May 26, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28548694/towards-a-proportionality-assessment-of-risk-reduction-measures-aimed-at-restricting-the-use-of-persistent-and-bioaccumulative-substances
#15
Frans Oosterhuis, Roy Brouwer, Martien Janssen, Julia Verhoeven, Cees Luttikhuizen
International chemicals legislation aims at adequately controlling persistent organic pollutants (POPs) and substances of very high concern (SVHCs), such as persistent, bioaccumulative and toxic (PBT) and very persistent and very bioaccumative (vPvB) substances, with a view to progressively substitute these substances with suitable less hazardous alternatives. Using cost-effectiveness analysis to assess the (dis)proportionality of measures to control such substances (collectively called PBT in this paper) requires benchmarks...
May 26, 2017: Integrated Environmental Assessment and Management
https://www.readbyqxmd.com/read/28548540/nicotinamide-adenine-dinucleotide-nad-sup-sup-metabolism-and-neurodegeneration
#16
Mariana Pehar, Benjamin A Harlan, Kelby M Killoy, Marcelo R Vargas
SIGNIFICANCE: Nicotinamide adenine dinucleotide (NAD<sup>+</sup>) participates in redox reactions and NAD<sup>+</sup>-dependent signaling processes, which involve the cleavage of NAD<sup>+</sup> coupled to post-translational modifications of proteins or the production of second messengers. Either as a primary cause or as a secondary component of the pathogenic process, mitochondrial dysfunction and oxidative stress are prominent features of several neurodegenerative diseases...
May 26, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28548486/elucidation-of-the-oxygen-surface-kinetics-in-a-coated-dual-phase-membrane-for-enhancing-oxygen-permeation-flux
#17
Beom Tak Na, Jeong Hwan Park, Jong Hyuk Park, Ji Haeng Yu, Jong Hoon Joo
The dual-phase membrane has received much attention as the solution to the instability of the oxygen permeation membrane. It has been reported that the oxygen flux of the dual-phase membrane is greatly enhanced by the active coating layer. However, there has been little discussion about the enhancement mechanism by surface coating in the dual-phase membrane. This study investigates the oxygen flux of Ce0.9Gd0.1O2-δ-La0.7Sr0.3MnO3±δ (GDC 80 vol.%/LSM 20 vol.%) composite membrane depending on the oxygen partial pressure (P_(O_2 )) to elucidate the mechanism of enhanced oxygen flux by the surface modification in the fluorite-rich phase dual-phase membrane...
May 26, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28548308/validation-of-a-french-version-of-the-sleep-condition-indicator-a-clinical-screening-tool-for-insomnia-disorder-according-to-dsm-5-criteria
#18
Sophie Bayard, Cindy Lebrun, Khaalid Hassan Maudarbocus, Vanessa Schellaert, Alicia Joffre, Esther Ferrante, Marie Le Louedec, Alice Cournoulat, Marie-Christine Gely-Nargeot, Annemarie I Luik
Insomnia disorder is frequent in the population, yet there is no French screening instrument available that is based on the updated DSM-5 criteria. We evaluated the validity and reliability of the French version of an insomnia screening instrument based on DSM-5 criteria, the Sleep Condition Indicator, in a population-based sample of adults. A total of 366 community-dwelling participants completed a face-to-face clinical interview to determine insomnia disorder against DSM-5 criteria and several questionnaires including the French Sleep Condition Indicator version...
May 26, 2017: Journal of Sleep Research
https://www.readbyqxmd.com/read/28548279/significant-decreases-in-blood-propofol-concentrations-during-adrenalectomy-for-phaeochromocytoma
#19
Tatsunori Watanabe, Haruhiko Hiraoka, Takuya Araki, Daisuke Nagano, Tohru Aomori, Tomonori Nakamura, Koujirou Yamamoto, Hiroshi Baba
AIM: The kinetics of propofol are influenced by cardiac output. The aim of this study was to examine changes in blood propofol concentrations during phaeochromocytoma surgery using target-controlled infusion (TCI) anaesthesia with propofol. METHODS: This is a prospective observational study. Ten patients with phaeochromocytoma who underwent unilateral adrenalectomy were included. Cardiac output was measured using an arterial pressure-based cardiac output analysis method...
May 26, 2017: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28548220/bedside-ultrasound-in-acute-appendicitis-in-the-emergency-department-methodological-and-statistical-issues-on-diagnostic-value
#20
Fatemeh Koohi, Siamak Sabour
We were interested to read the recent paper by Gungor F and colleagues published in May issue of the Acad Emerg Med 2017.(1) The aim of the authors was to evaluate diagnostic value of point-of-care US (POCUS) in clinical decision making of emergency physicians (EPs) for acute appendicitis (AA) in the emergency department (ED).(1) A total of 264 patients were included into a prospective observational clinical study and based on their results 169 (64%) had a diagnosis of AA. This article is protected by copyright...
May 26, 2017: Academic Emergency Medicine: Official Journal of the Society for Academic Emergency Medicine
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