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https://www.readbyqxmd.com/read/28822076/studies-of-the-benzopyran-class-of-selective-cox-2-inhibitors-using-3d-qsar-and-molecular-docking
#1
Dharmendra K Yadav, Saloni, Praveen Sharma, Sanjeev Misra, Harpreet Singh, Ricardo L Mancera, Kang Kim, Cheongyun Jang, Mi-Hyun Kim, Horacio Pérez-Sánchez, Eun Ha Choi, Surendra Kumar
The Gaussian-based 3D-QSAR studies for 58 selective COX-2 (cyclooxygenase-2) inhibitors belonging to benzopyran chemical class were performed. Partial least squares analysis produced statistically significant model with (R training(2)  = 0.866) and predictability (Q training(2)  = 0.66, Q test(2)  = 0.846). The 3D-QSAR model includes steric, electrostatic, hydrophobic, and hydrogen bond acceptor field indicators, whereas the potential field contributions indicate that the steric and hydrophobic features of the molecules play an important role in governing their biological activity...
August 18, 2017: Archives of Pharmacal Research
https://www.readbyqxmd.com/read/28822018/the-prevalence-of-growth-hormone-deficiency-in-survivors-of-subarachnoid-haemorrhage-results-from-a-large-single-centre-study
#2
Sumithra Giritharan, Joanna Cox, Calvin J Heal, David Hughes, Kanna Gnanalingham, Tara Kearney
OBJECTIVE: The variation in reported prevalence of growth hormone deficiency (GHD) post subarachnoid haemorrhage (SAH) is mainly due to methodological heterogeneity. We report on the prevalence of GHD in a large cohort of patients following SAH, when dynamic and confirmatory pituitary hormone testing methods are systematically employed. DESIGN: In this cross-sectional study, pituitary function was assessed in 100 patients following SAH. Baseline pituitary hormonal profile measurement and glucagon stimulation testing (GST) was carried out in all patients...
August 18, 2017: Pituitary
https://www.readbyqxmd.com/read/28821854/dynamics-of-hydration-water-plays-a-key-role-in-determining-the-binding-thermodynamics-of-protein-complexes
#3
Song-Ho Chong, Sihyun Ham
Interfacial waters are considered to play a crucial role in protein-protein interactions, but in what sense and why are they important? Here, using molecular dynamics simulations and statistical thermodynamic analyses, we demonstrate distinctive dynamic characteristics of the interfacial water and investigate their implications for the binding thermodynamics. We identify the presence of extraordinarily slow (~1,000 times slower than in bulk water) hydrogen-bond rearrangements in interfacial water. We rationalize the slow rearrangements by introducing the "trapping" free energies, characterizing how strongly individual hydration waters are captured by the biomolecular surface, whose magnitude is then traced back to the number of water-protein hydrogen bonds and the strong electrostatic field produced at the binding interface...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28821746/neural-circuitry-governing-anxious-individuals-mis-allocation-of-working-memory-to-threat
#4
Daniel M Stout, Alexander J Shackman, Walker S Pedersen, Tara A Miskovich, Christine L Larson
Dispositional anxiety is a trait-like phenotype that confers increased risk for a range of debilitating neuropsychiatric disorders. Like many patients with anxiety disorders, individuals with elevated levels of dispositional anxiety are prone to intrusive and distressing thoughts in the absence of immediate threat. Recent electrophysiological research suggests that these symptoms are rooted in the mis-allocation of working memory (WM) resources to threat-related information. Here, functional MRI was used to identify the network of brain regions that support WM for faces and to quantify the allocation of neural resources to threat-related distracters in 81 young adults...
August 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28821443/the-effect-of-pelvic-motion-on-spino-pelvic-parameters
#5
Andrew M Hayden, Ann M Hayes, Jennifer L Brechbuhler, Heidi Israel, Howard M Place
BACKGROUND CONTEXT: To date, many studies have examined how pelvic position affects the spinal curvature and spino-pelvic parameters. However, these studies focus on a static relationship, comparing pelvis and spine in a relaxed or baseline position only. Indeed, the spino-pelvic connection is dynamic, as a subject can easily be taught to rotate their pelvis anteriorly or posteriorly on the femoral head, all while maintaining an erect posture. Therefore, for a true understanding of pelvic influence on the spinal column, it is necessary to examine spino-pelvic parameters in multiple pelvic positions within the same subject...
August 15, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28820757/flipping-the-nursing-classroom-without-flipping-out-the-students
#6
Victoria Anne Greenwood, Caroline Mosca
Flipping the class has been touted as a method of increasing student participation and improving learning outcomes. In this study, nursing students were introduced to the flipped classroom. They were instructed to listen to narrated PowerPoint presentations before class and be ready to participate in case studies that would enhance their understanding of important concepts. When comparing student test scores before and after flipping the classroom, we found a statistically significant increase of 8.04 points after the change in instruction...
August 17, 2017: Nursing Education Perspectives
https://www.readbyqxmd.com/read/28820200/statistical-thermodynamics-unveils-the-dissolution-mechanism-of-cellobiose
#7
Thomas W J Nicol, Noriyuki Isobe, James H Clark, Seishi Shimizu
In the study of the cellulose dissolution mechanism opinion is still divided. Here, the solution interaction components of the most prominent hypotheses for the driving force of cellulose dissolution were evaluated quantitatively. Combining a rigorous statistical thermodynamic theory and cellobiose solubility data in the presence of chloride salts, whose cations progress in the Hofmeister series (KCl, NaCl, LiCl and ZnCl2), we have shown that cellobiose solubilization is driven by the preferential accumulation of salts around the solutes which is stronger than cellobiose hydration...
August 18, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28820022/self-reported-school-demands-and-psychosomatic-problems-among-adolescents-changes-in-the-association-between-1988-and-2011
#8
Karina Nygren, Curt Hagquist
AIMS: The aim of the present study was to examine changes over time in the relationship between self-reported school demands and psychosomatic problems, also considering the impact of student influence and teacher support. METHODS: Data from a cross-sectional study (Young in Värmland) including eight data collections (1988-2011) among Swedish students aged 15-16 were used ( n = 20,115). Analyses with multinomial logistic regression and descriptive statistics were applied...
August 1, 2017: Scandinavian Journal of Public Health
https://www.readbyqxmd.com/read/28819711/measurement-invariance-the-lack-thereof-and-modeling-change
#9
Michael C Edwards, Carrie R Houts, R J Wirth
PURPOSE: Measurement invariance issues should be considered during test construction. In this paper, we provide a conceptual overview of measurement invariance and describe how the concept is implemented in several different statistical approaches. Typical applications look for invariance over things such as mode of administration (paper and pencil vs. computer based), language/translation, age, time, and gender, to cite just a few examples. To the extent that the relationships between items and constructs are stable/invariant, we can be more confident in score interpretations...
August 17, 2017: Quality of Life Research
https://www.readbyqxmd.com/read/28819474/expanding-health-insurance-scheme-in-the-informal-sector-in-nigeria-awareness-as-a-potential-demand-side-tool
#10
David Ayobami Adewole, Saidat Abisola Akanbi, Kayode Omoniyi Osungbade, Segun Bello
INTRODUCTION: The implementation and expansion of a health insurance scheme in the informal sector, particularly in developing countries, is a challenge. With the aid of an innovative Information-Education and Communication model, titled 'Understanding the concept of health insurance: An innovative social marketing tool', an assessment of the awareness and perception of the scheme among market women was carried out. METHODS: This is a cross-sectional descriptive survey, carried out among market women in Ibadan, Nigeria...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28819389/discovery-of-non-invasive-glycan-biomarkers-for-detection-and-surveillance-of-gastric-cancer
#11
Ruihuan Qin, Junjie Zhao, Wenjun Qin, Zejian Zhang, Ran Zhao, Jing Han, Yupeng Yang, Lixiao Li, Xuefei Wang, Shifang Ren, Yihong Sun, Jianxin Gu
Purpose: Gastric cancer (GC), one of the world's top five most common cancers, is the third leading cause of cancer related death. It is urgent to identify non-invasive biomarkers for GC. The objective of our study was to find out non-invasive biomarkers for early detection and surveillance of GC based on glycomic analysis. Method: Ethyl esterification derivatization combined with MALDI-TOF MS analysis was employed for the comprehensive serum glycomic analysis in order to investigate glycan markers that would indicate the onset and progression of gastric cancer...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/28819069/factors-influencing-career-intentions-on-completion-of-general-practice-vocational-training-in-england-a-cross-sectional-study
#12
Jeremy Dale, Rachel Russell, Emma Scott, Katherine Owen
OBJECTIVES: General practice is experiencing a growing crisis with the numbers of doctors who are training and then entering the profession in the UK failing to keep pace with workforce needs. This study investigated the immediate to medium term career intentions of those who are about to become general practitioners (GPs) and the factors that are influencing career plans. DESIGN: Online questionnaire survey, with quantitative answers analysed using descriptive statistics and free text data analysed using a thematic framework approach...
August 17, 2017: BMJ Open
https://www.readbyqxmd.com/read/28818968/the-turbulent-cascade-in-five-dimensions
#13
José I Cardesa, Alberto Vela-Martín, Javier Jiménez
To the naked eye, turbulent flows exhibit whirls of many different sizes. To each size, or scale, corresponds a fraction of the total energy resulting from a cascade in five dimensions: scale, time, and three-dimensional space. Understanding this process is critical to strategies for modeling geophysical and industrial flows. By tracking the flow regions containing energy in different scales, we have detected the statistical predominance of a cross-scale link whereby fluid lumps of energy at scale Δ appear within lumps of scale 2Δ and die within those of scale Δ/2...
August 17, 2017: Science
https://www.readbyqxmd.com/read/28818821/patient-participation-at-health-care-conferences-engaged-patients-increase-information-flow-expand-propagation-and-deepen-engagement-in-the-conversation-of-tweets-compared-to-physicians-or-researchers
#14
Audun Utengen, Dara Rouholiman, Jamison G Gamble, Francisco Jose Grajales Iii, Nisha Pradhan, Alicia C Staley, Liza Bernstein, Sean D Young, Kevin A Clauson, Larry F Chu
BACKGROUND: Health care conferences present a unique opportunity to network, spark innovation, and disseminate novel information to a large audience, but the dissemination of information typically stays within very specific networks. Social network analysis can be adopted to understand the flow of information between virtual social communities and the role of patients within the network. OBJECTIVE: The purpose of this study is to examine the impact engaged patients bring to health care conference social media information flow and how they expand dissemination and distribution of tweets compared to other health care conference stakeholders such as physicians and researchers...
August 17, 2017: Journal of Medical Internet Research
https://www.readbyqxmd.com/read/28817631/a-computational-model-for-biosonar-echoes-from-foliage
#15
Chen Ming, Anupam Kumar Gupta, Ruijin Lu, Hongxiao Zhu, Rolf Müller
Since many bat species thrive in densely vegetated habitats, echoes from foliage are likely to be of prime importance to the animals' sensory ecology, be it as clutter that masks prey echoes or as sources of information about the environment. To better understand the characteristics of foliage echoes, a new model for the process that generates these signals has been developed. This model takes leaf size and orientation into account by representing the leaves as circular disks of varying diameter. The two added leaf parameters are of potential importance to the sensory ecology of bats, e...
2017: PloS One
https://www.readbyqxmd.com/read/28817567/accounting-for-biotic-spatial-variability-in-fields-case-of-resistance-screening-against-sunflower-verticillium-wilt
#16
Hélène Missonnier, Alban Jacques, JiSu Bang, Jean Daydé, Virginie Mirleau-Thebaud
In breeding for disease resistance, the magnitude of the genetic response is difficult to appreciate because of environmental stresses that interact with the plant genotype. We discuss herein the fundamental problems in breeding for disease resistance with the aim being to better understand the interactions between plant, pathogen, and spatial patterns. The goal of this study is to fine tune breeding decisions by incorporating spatial patterns of such biotic factors into the definition of disease-occurrence probability...
2017: PloS One
https://www.readbyqxmd.com/read/28817531/bias-confounding-and-interaction-lions-and-tigers-and-bears-oh-my
#17
Thomas R Vetter, Edward J Mascha
Epidemiologists seek to make a valid inference about the causal effect between an exposure and a disease in a specific population, using representative sample data from a specific population. Clinical researchers likewise seek to make a valid inference about the association between an intervention and outcome(s) in a specific population, based upon their randomly collected, representative sample data. Both do so by using the available data about the sample variable to make a valid estimate about its corresponding or underlying, but unknown population parameter...
September 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28817463/delivering-high-value-inflammatory-bowel-disease-care-through-telemedicine-visits
#18
Shawn X Li, Kimberly D Thompson, Tracey Peterson, Shelley Huneven, Jamie Carmichael, Fredric J Glazer, Katelyn Darling, Corey A Siegel
BACKGROUND: Patients with inflammatory bowel disease (IBD) require regular follow-up to manage their care, which requires significant amount of time and out-of-pocket costs. Telemedicine in the form of video virtual visits could serve as an alternative to in-office visits. The aim of this project was to understand if telemedicine can provide high value care (defined as quality/cost) to outpatients with IBD. METHODS: Patients who participated in the IBD telemedicine clinic in the second half of 2015 were included...
August 16, 2017: Inflammatory Bowel Diseases
https://www.readbyqxmd.com/read/28817329/assessing-years-of-life-lost-versus-number-of-deaths-in-the-united-states-1995-2015
#19
Glen B Taksler, Michael B Rothberg
OBJECTIVES: To assess years of life lost to each cause of death in the United States between 1995 and 2015, and compare it with the number of deaths. METHODS: We used Vital Statistics mortality data and defined "life-years lost" as remaining life expectancy for each decedent's age, sex, and race. We calculated the share of life-years lost to each cause of death in each year, and examined reasons for changes. RESULTS: In 2015, heart disease caused the most deaths, but cancer caused 23% more life-years lost...
August 17, 2017: American Journal of Public Health
https://www.readbyqxmd.com/read/28817229/performance-equivalency-between-computer-based-and-traditional-pen-and-paper-assessment-a-case-study-in-clinical-anatomy
#20
Bruno Guimarães, José Ribeiro, Bernardo Cruz, André Ferreira, Hélio Alves, Ricardo Cruz-Correia, Maria Dulce Madeira, Maria Amélia Ferreira
The time, material, and staff-consuming nature of anatomy's traditional pen-and-paper assessment system, the increase in the number of students enrolling in medical schools and the ever-escalating workload of academic staff have made the use of computer-based assessment (CBA) an attractive proposition. To understand the impact of such shift in the assessment method, an experimental study evaluating its effect on students' performance was designed. Additionally, students' opinions toward CBA were gathered. Second-year medical students attending a Clinical Anatomy course were randomized by clusters in two groups...
August 17, 2017: Anatomical Sciences Education
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