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statistical mechanics

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https://www.readbyqxmd.com/read/29775687/effects-of-bronchodilation-on-biomarkers-of-peripheral-airway-inflammation-in-copd
#1
Pierachille Santus, Dejan Radovanovic, Susanna Mascetti, Alessia Pauletti, Vincenzo Valenti, Marco Mantero, Alberto Papi, Marco Contoli
Peripheral airway inflammation and dysfunction are key elements in the pathogenesis of COPD. The exhaled alveolar fraction of nitric oxide (CANO) is an indirect biomarker of lung peripheral inflammation. We tested whether inhaled long-acting bronchodilators (LABA) can affect CANO and we evaluated correlations with lung mechanics in patients with COPD. Two-centre, randomised, double blind, crossover study including COPD patients with moderate-to-severe airflow obstruction. Following a pharmacological washout, multi-flow exhaled fraction of NO (FENO), plethysmography, lung diffusion (DLCO), single breath nitrogen washout test and dyspnoea were measured in a crossover manner at baseline and 30, 60 and 180 minutes following administration of salmeterol (Sal) or formoterol fumarate (FF)...
May 15, 2018: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/29775392/cecal-resection-with-bipolar-sealing-devices-in-a-rat-model
#2
E Tagkalos, A Heimann, T Gaiser, D Hirsch, I Gockel, H Lang, B Jansen-Winkeln
BACKGROUND: Bipolar sealing devices are routinely used to seal blood vessels. The aim of the study is to evaluate the feasibility and safety of colonic sealing with the use of the bipolar energy devices in rats as model for experimental appendectomy. METHODS: Seventy-five male Wistar rats underwent a cecal resection with four different bipolar sealing devices or a linear stapler. The harvesting procedure was performed immediately or at postoperative day (POD) 7...
May 18, 2018: Journal of Investigative Surgery: the Official Journal of the Academy of Surgical Research
https://www.readbyqxmd.com/read/29775353/detailed-balance-of-thermalization-dynamics-in-rydberg-atom-quantum-simulators
#3
Hyosub Kim, YeJe Park, Kyungtae Kim, H-S Sim, Jaewook Ahn
Dynamics of large complex systems, such as relaxation towards equilibrium in classical statistical mechanics, often obeys a master equation that captures essential information from the complexities. Here, we find that thermalization of an isolated many-body quantum state can be described by a master equation. We observe sudden quench dynamics of quantum Ising-like models implemented in our quantum simulator, defect-free single-atom tweezers in conjunction with Rydberg-atom interaction. Saturation of their local observables, a thermalization signature, obeys a master equation experimentally constructed by monitoring the occupation probabilities of prequench states and imposing the principle of the detailed balance...
May 4, 2018: Physical Review Letters
https://www.readbyqxmd.com/read/29775352/three-dimensional-color-code-thresholds-via-statistical-mechanical-mapping
#4
Aleksander Kubica, Michael E Beverland, Fernando Brandão, John Preskill, Krysta M Svore
Three-dimensional (3D) color codes have advantages for fault-tolerant quantum computing, such as protected quantum gates with relatively low overhead and robustness against imperfect measurement of error syndromes. Here we investigate the storage threshold error rates for bit-flip and phase-flip noise in the 3D color code (3DCC) on the body-centered cubic lattice, assuming perfect syndrome measurements. In particular, by exploiting a connection between error correction and statistical mechanics, we estimate the threshold for 1D stringlike and 2D sheetlike logical operators to be p_{3DCC}^{(1)}≃1...
May 4, 2018: Physical Review Letters
https://www.readbyqxmd.com/read/29775309/relationship-between-proton-transport-and-morphology-of-perfluorosulfonic-acid-membranes-a-reactive-molecular-dynamics-approach
#5
Takuya Mabuchi, Takashi Tokumasu
A reactive molecular dynamics simulation has been performed for the characterization of the relationship between proton transport and water clustering in polymer electrolyte membranes. We have demonstrated that the anharmonic two-state empirical valence bond ( aTS-EVB) model is capable of describing efficiently excess proton transport through the Grotthuss hopping mechanism within the simplicity of the theoretical framework. In order to explore the long-time diffusion behavior in PFSA membranes with statistical certainty, simulations that are longer than 10 ns are needed...
May 18, 2018: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/29775130/taxonomy-of-clinical-encounters-during-the-first-90-days-post-delivery-of-an-initial-lower-limb-prosthesis
#6
Daniel Joseph Lee, Michael Wininger, David Mahler, Mark Parisi
BACKGROUND: The incidence and etiology of prosthetic services utilization is poorly understood during the first 90 days post-delivery of the initial lower limb prosthesis. This period is of critical importance, as prevailing policy dictates limits on the reimbursement for certain services provided during this time period. The first step in understanding the financial ramifications of such policy is to examine the taxonomy behind clinical encounters during this tenuous time period. OBJECTIVES: Quantify and categorize clinical encounters by incidence and etiology...
May 1, 2018: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/29775026/-clinical-study-on-serum-25-oh-d-level-in-patients-with-moderate-to-severe-allergic-rhinitis
#7
J Y Tan, T Liu, L X Zhang
Objective: Through the detection of the serum 25 (OH) D level of patients with moderate to severe allergic rhinitis (AR), we preliminarily explored the mechanism of vitamin D on AR and provided evidence for the control of AR. Method: Eighty cases of moderate to severe AR and 65 healthy adults were selected as the subjects. The level of 25 (OH) D was detected by enzyme-linked immunosorbent assay (ELISA), and the serum 25 (OH) D level of eight common serum allergens in patients with moderate to severe AR was analyzed...
February 2018: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
https://www.readbyqxmd.com/read/29774993/-preliminary-study-on-the-expression-of-egfrv%C3%A2-and-cxcr4-in-head-and-neck-squamous-cell-carcinoma
#8
H D Zhang, S C Gong, Y Q Liu, S B He, Q X Zhang, M Y Si, Z K Yu
Objective: The aim of this study is to detect the expression of EGFRvⅢ and CXCR4 in HNSCC and to explore its possible mechanism. Method: We selected 60 cases of HNSCC from May 2013 to November 2016 in our hospital for surgical treatment, including 44 cases of laryngeal squamous cell carcinoma, 14 cases of hypopharyngeal squamous cell carcinoma, and 2 cases of nasal squamous cell carcinoma. pTNM staging according to AJCC 2010, Ⅲ stage 17 cases, Ⅳa stage 40 cases, and Ⅳb stage 3 cases; according to tumor differentiation degree: 13 cases of high differentiation, moderately differentiation in 31 cases, and 16 cases of low differentiated; primary tumor, positive lymph node metastasis as the experimental group, and 10 cases of adjacent tissues are taken as control (control group)...
June 5, 2017: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
https://www.readbyqxmd.com/read/29774985/microrna-1270-is-associated-with-poor-prognosis-and-its-inhibition-yielded-anticancer-mechanisms-in-human-osteosarcoma
#9
Lei Zhong, Changjun Zheng, Hongjuan Fang, Meng Xu, Bingpeng Chen, Chen Li
In this work, we explored the aberrant expression pattern, clinical association, and functional regulations of microRNA-1270 (miR-1270) in osteosarcoma. Among in vitro osteosarcoma cell lines and in situ tissues of osteosarcoma patients, quantitative real time-PCR was used to examine their endogenous miR-1270 expression. Clinical correlation between endogenous miR-1270 expression and clinicopathological features of osteosarcoma patients, as well as cancer patients' overall survival, was statistically examined...
May 18, 2018: IUBMB Life
https://www.readbyqxmd.com/read/29774868/-seizure-susceptible-brain-regions-in-patients-with-low-grade-gliomas
#10
Yinyan Wang, Tao Jiang
Patients afflicted with low-grade glioma frequently suffer from seizures. The mechanisms for seizure initiation in these patients remain poorly understood. Tumor location is correlated with seizure initiation. However, these correlative studies rely on dichotomized data analysis which is based on arbitrary lobe assignments. As a result, the lesion-symptom correlation may be incorrectly interpreted. Categorizing patients according to tumor involvement in a single brain lobe might cause the neglect of important information, such as lesion location and lesion volume...
April 28, 2018: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/29773885/metabolic-perturbations-of-post-load-hyperglycemia-vs-fasting-hyperglycemia
#11
Jing-Yi Lu, Jia-Hui Peng, Xiao-Jing Ma, Yi-Nan Zhang, Wei Zhu, Xing-Xing He, Ling-Wen Ying, Yu-Qian Bao, Jian Zhou, Wei-Ping Jia
There is evidence that post-load/post-meal hyperglycemia is a stronger risk factor for cardiovascular disease than fasting hyperglycemia. The underlying mechanism remains to be elucidated. The current study aimed to compare the metabolic profiles of post-load hyperglycemia and fasting hyperglycemia. All subjects received an oral glucose tolerance test (OGTT) and were stratified into fasting hyperglycemia (FH) or post-load hyperglycemia (PH). Forty-six (FH, n = 23; PH, n = 23) and 40 patients (FH, n = 20; PH, n = 20) were recruited as the exploratory and the validation set, respectively, and underwent metabolic profiling...
May 17, 2018: Acta Pharmacologica Sinica
https://www.readbyqxmd.com/read/29773463/the-optimal-duration-of-alarm-therapy-use-in-children-with-primary-monosymptomatic-nocturnal-enuresis
#12
Kirill V Kosilov, Boris I Geltser, Sergay A Loparev, Irina G Kuzina, Olga V Shakirova, Natalia S Zhuravskaya, Alexandra Lobodenko
BACKGROUND: The prevalence of primary monosymptomatic nocturnal enuresis (PMNE) has a range of 1.6-5.3% in adolescents and 7.5-12.4% in children of 5-10 years. Alarm intervention has been well known for more than 30 years. This method is a reliable and safe means of treating primary monosymptomatic nocturnal enuresis, being effective in 60-80% of cases. OBJECTIVE: The objective of this study was to determine the efficacy of alarm intervention prolongation after the cure in order to reduce the risk of disease recurrence...
May 5, 2018: Journal of Pediatric Urology
https://www.readbyqxmd.com/read/29773426/stem-cell-transcription-factor-sox2-in-synovial-sarcoma-and-other-soft-tissue-tumors
#13
Heba Zayed, Iver Petersen
BACKGROUND: SOX2 has gained considerable interest as a pluripotency inducing gene. Co-transfection of SOX2 together with NANOG, KLF4 and c-MYC into adult fibroblasts was able to generate pluripotent stem cells. SOX2 has been reported to be expressed in synovial sarcoma, a tumor being characterized by the SS18-SSX gene fusion forming part of the SWI/SNF chromatin remodeling complex that affects histone methylation. The role of SOX2 in this tumor type as well as other soft tissue tumor entities however is still poorly characterized...
May 4, 2018: Pathology, Research and Practice
https://www.readbyqxmd.com/read/29773129/in-vitro-acaricide-and-anticholinesterase-activities-of-digitaria-insularis-poaceae-against-rhipicephalus-boophilus-microplus
#14
Francianne Oliveira Santos, Hélimar Gonçalves Lima, Soraia de Souza Santa Rosa, Nayana Borges das Mercês, Taiane Menezes Serra, Rosângela Soares Uzeda, Isabella Mary Alves Reis, Mariana Borges Botura, Alexsandro Branco, Maria José Moreira Batatinha
Medicinal plants have been proposed as an alternative for acaricide control, aiming to develop lower-cost and eco-friendly ectoparasiticide products. The aim of this study was to evaluate the in vitro activity of the extracts and fractions obtained from the leaves of Digitaria insularis on the reproductive efficacy of the bovine tick Rhipicephalus (Boophilus) microplus. Also, we investigated the possible relation with the anticholinesterase mechanism. The effect of the crude hydroethanolic (CH), hexanic (HE), ethyl acetate (EA), butanolic (BT) and residual hydroethanolic (RH) extracts, as well as four fractions of HE, were evaluated using adult immersion test...
May 15, 2018: Veterinary Parasitology
https://www.readbyqxmd.com/read/29772872/spatial-analysis-for-the-epidemiological-study-of-cardiovascular-diseases-a-systematic-literature-search
#15
Carlos Mena, Cesar Sepúlveda, Eduardo Fuentes, Yony Ormazábal, Iván Palomo
Cardiovascular diseases (CVDs) are the primary cause of death and disability in de world, and the detection of populations at risk as well as localization of vulnerable areas is essential for adequate epidemiological management. Techniques developed for spatial analysis, among them geographical information systems and spatial statistics, such as cluster detection and spatial correlation, are useful for the study of the distribution of the CVDs. These techniques, enabling recognition of events at different geographical levels of study (e...
May 7, 2018: Geospatial Health
https://www.readbyqxmd.com/read/29772708/microstructure-evolution-and-mechanical-behavior-of-2219-aluminum-alloys-additively-fabricated-by-the-cold-metal-transfer-process
#16
Xuewei Fang, Lijuan Zhang, Hui Li, Chaolong Li, Ke Huang, Bingheng Lu
In this research, four different welding arc modes including conventional cold metal transfer (CMT), CMT-Pulse (CMT-P), CMT-Advanced (CMT-ADV), and CMT pulse advanced (CMT-PADV) were used to deposit 2219-Al wire. The effects of different arc modes on porosity, pore size distribution, microstructure evolution, and mechanical properties were thoroughly investigated. The statistical analysis of the porosity and its size distribution indicated that the CMT-PADV process gave the smallest pore area percentage and pore aspect ratio, and had almost no larger pores...
May 16, 2018: Materials
https://www.readbyqxmd.com/read/29772385/optimization-of-collagen-elastin-like-polypeptide-composite-tissue-engineering-scaffolds-using-response-surface-methodology
#17
Bhuvaneswari Gurumurthy, Jason A Griggs, Amol V Janorkar
The ability of a tissue-engineered scaffold to regenerate functional tissues depends on its mechanical and biochemical properties. Though the commonly used collagen scaffolds have good biochemical properties, they fail due to their poor mechanical and physical properties. We have reinforced the collagen matrix with elastin-like polypeptide (ELP) to improve the mechanical and physical properties and optimized the composite composition using a novel statistical method of response surface methodology (RSM). RSM used a central composite design to correlate the 2 input factor variables (collagen and ELP concentrations) and 3 output objectives (tensile strength, elastic modulus, and toughness) using a second order polynomial equation...
May 2, 2018: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29772079/detection-of-multiple-perturbations-in-multi-omics-biological-networks
#18
Paula J Griffin, Yuqing Zhang, William Evan Johnson, Eric D Kolaczyk
Cellular mechanism-of-action is of fundamental concern in many biological studies. It is of particular interest for identifying the cause of disease and learning the way in which treatments act against disease. However, pinpointing such mechanisms is difficult, due to the fact that small perturbations to the cell can have wide-ranging downstream effects. Given a snapshot of cellular activity, it can be challenging to tell where a disturbance originated. The presence of an ever-greater variety of high-throughput biological data offers an opportunity to examine cellular behavior from multiple angles, but also presents the statistical challenge of how to effectively analyze data from multiple sources...
May 17, 2018: Biometrics
https://www.readbyqxmd.com/read/29772033/passivity-of-fit-of-a-novel-prefabricated-implant-supported-mandibular-full-arch-reconstruction-a-comparative-in-vitro-study
#19
Matthias Karl, Roberto Carretta, Kenji W Higuchi
PURPOSE: To quantify the strain development of a new prefabricated implant-supported mandibular full-arch reconstruction. MATERIALS AND METHODS: Five resin models reflecting edentulous mandibles were each restored with three interforaminal implants and prefabricated frameworks with a novel compensation mechanism, cast frameworks, and computer-aided design/computer-assisted manufacturing (CAD/CAM)-fabricated frameworks. Strains were recorded during superstructure fixation...
May 17, 2018: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/29771952/analysis-of-multi-level-spatial-data-reveals-strong-synchrony-in-seasonal-influenza-epidemics-across-norway-sweden-and-denmark
#20
Sinead E Morris, Birgitte Freiesleben de Blasio, Cécile Viboud, Amy Wesolowski, Ottar N Bjørnstad, Bryan T Grenfell
Population structure, spatial diffusion, and climatic conditions mediate the spatiotemporal spread of seasonal influenza in temperate regions. However, much of our knowledge of these dynamics stems from a few well-studied countries, such as the United States (US), and the extent to which this applies in different demographic and climatic environments is not fully understood. Using novel data from Norway, Sweden, and Denmark, we applied wavelet analysis and non-parametric spatial statistics to explore the spatiotemporal dynamics of influenza transmission at regional and international scales...
2018: PloS One
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