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Gustavo Haquin, Zohar Yungrais, Danielle Ilzycer, Hovav Zafrir, Noam Weisbrod
The dependency of radon emanation on soil texture was investigated using the closed chamber method. Ground phosphate rock with a large specific surface area was analyzed, and the presence of inner pores, as well as a high degree of roughness and heterogeneity in the phosphate particles, was found. The average radon emanation of the dry phosphate was 0.145 ± 0.016. The emanation coefficient was highest (0.169 ± 0.019) for the smallest particles (<25 μm), decreasing to a constant value (0.091 ± 0...
October 14, 2017: Journal of Environmental Radioactivity
Zora S Zunic, Z Stojanovska, N Veselinovic, R Mishra, I V Yarmoshenko, B K Sapra, T Ishikawa, Y Omori, Z Curguz, P Bossew, V Udovicic, R C Ramola
This article deals with the variation of radon (Rn), thoron (Tn) and their progeny concentrations expressed in terms of equilibrium equivalent concentrations (EERC and EETC), in 40 houses, in four villages of Sokobanja municipality, Southern Serbia. Two types of passive detectors were used: (1) discriminative radon-thoron detector for simultaneous Rn and Tn gases measurements and (2) direct Tn and Rn progeny sensors (DRPS/DTPS) for measuring Rn and Tn progeny concentrations. Detectors were exposed simultaneously for a single period of 12 months...
September 19, 2017: Radiation Protection Dosimetry
C Licour, F Tondeur, I Gerardy, N Medaghri Alaoui, N Dubois, R Perreaux, N Gerardy, D Christiaens
Knowing the concentration of 226Ra in soil and of 222Rn in soil gas is important for the analysis of indoor radon data and the prediction of radon-prone areas. Except for soil Rn in Ardenne, the data concerning these two radionuclides in Belgian soils are very scarce. In the context of Master theses and international courses, students made 92 measurements of 226Ra in soil samples, 105 of 222Rn in soil gas, and 74 of soil permeability, a significant addition to the existing similar data. The data are analysed in relation with soil texture, geological units and indoor radon risk...
September 19, 2017: Radiation Protection Dosimetry
Kalyani Ankem, Sookyung Cho, Diana Simpson
INTRODUCTION: The majority of medication apps support medication adherence. Equally, if not more important, is medication safety. Few apps report on medication safety, and fewer studies have been conducted with these apps. OBJECTIVES: The usability of a medication safety app was tested with nurses to reveal their perceptions of the graphical user interface and to discover problems they encountered in using the app. METHODS: Usability testing of the app was conducted with RN-BSN students and informatics students (n = 18)...
October 16, 2017: Informatics for Health & Social Care
Xiaoming Rong, Jing Yin, Hongxuan Wang, Xiaoni Zhang, Ying Peng
OBJECTIVE: This study aimed to clarify the effect of statins on preventing the risk of postradiation epilepsy. METHODS: We performed a retrospective analysis of neurological nasopharyngeal carcinoma patients with a history of radiotherapy. Patients with a history of epilepsy before radiation and those who received prophylactically antiepileptic treatment were excluded. The demographic and clinical data of these patients were collected through chart review. We used Kaplan-Meier analysis (log-rank test) to examine the effect of statins on epilepsy-free survival...
October 16, 2017: Epilepsia
Leonardo M Versieux, Nállarett Dávila, Geadelande C Delgado, Valdeci F de Sousa, Edweslley Otaviano de Moura, Tarciso Filgueiras, Marccus V Alves, Eric Carvalho, Daniel Piotto, Rafaela C Forzza, Alice Calvente, Jomar G Jardim
A National Forest Inventory (NFI) encompassing the entire territory of Brazil is in progress. It is coordinated and promoted by the Brazilian Forest Service of the Ministry of Environment. In each state, the NFI collaborates with local herbaria by receiving collected plant material and performing species identification. Consultants are hired by the NFI and work at the local herbaria under the supervision of a curator. In exchange for curatorial assistance, the NFI provides equipment and consumables for the herbarium...
2017: PhytoKeys
Changkun Ma, Yi Luo, Mingan Shao, Xiangdong Li, Lin Sun, Xiaoxu Jia
Black locust accounts for over 90% of artificial forests in China's Loess Plateau region. However, water use of black locust is an uphill challenge for this semi-arid region. To accurately quantify tree water use and to explain the related hydrological processes, it is important to collect reliable data for application in the estimation of sap flow and its response to environmental factors. This study measured sap flow in black locust in the 2015 and 2016 growth seasons using the thermal dissipation probes technique and laboratory-calibrated Granier's equation...
October 13, 2017: Scientific Reports
David Arredondo Zamarripa, Ramsés Noguez Imm, Ana María Bautista Cortés, Osvaldo Vázquez Ruíz, Michela Bernardini, Alessandra Fiorio Pla, Dimitra Gkika, Natalia Prevarskaya, Fernando López-Casillas, Wolfgang Liedtke, Carmen Clapp, Stéphanie Thébault
Breakdown of the blood-retinal barrier (BRB), as occurs in diabetic retinopathy and other chronic retinal diseases, results in vasogenic edema and neural tissue damage, causing vision loss. Vasoinhibins are N-terminal fragments of prolactin that prevent BRB breakdown during diabetes. They modulate the expression of some transient receptor potential (TRP) family members, yet their role in regulating the TRP vanilloid subtype 4 (TRPV4) remains unknown. TRPV4 is a calcium-permeable channel involved in barrier permeability, which blockade has been shown to prevent and resolve pulmonary edema...
October 12, 2017: Scientific Reports
Estela Shabani, Benjamin Hanisch, Robert O Opoka, Thomas Lavstsen, Chandy C John
BACKGROUND: Expression of group A and the A-like subset of group B Plasmodium falciparum erythrocyte membrane protein 1 (PfEMP1) is associated with severe malaria (SM). The diversity of var sequences combined with the challenges of distinct classification of patient pathologies has made studying the role of distinct PfEMP1 variants on malaria disease severity challenging. The application of retinopathy in the recent years has provided a further method to clinically evaluate children with cerebral malaria (CM)...
October 13, 2017: BMC Medicine
Bita Javan, Mohamad Reza Kalani, Majid Shahbazi
Hepatitis B virus (HBV) infection is well known as an important cause of the chronic liver disease. The screening of the genotype of certain cytokines might be helpful to predict the clinical outcome of an HBV infection. The present study investigates the relationship between the polymorphism and haplotypes of the Interleukin-1 (IL-1) gene family, including IL-1-alpha (IL-1A), IL-1-beta (IL-1B) and IL-1 receptor antagonist (IL-1RN), with chronic HBV infection. 297 chronic HBV and 333 matched on sex and age control individuals were genotyped using the standard sequence-specific- polymerase chain reaction primer (SSP-PCR) method...
October 11, 2017: Journal of Medical Virology
Brian R Pauw, Claudia Kästner, Andreas F Thünemann
This paper presents the first worldwide inter-laboratory comparison of small-angle X-ray scattering (SAXS) for nanoparticle sizing. The measurands in this comparison are the mean particle radius, the width of the size distribution and the particle concentration. The investigated sample consists of dispersed silver nanoparticles, surrounded by a stabilizing polymeric shell of poly(acrylic acid). The silver cores dominate the X-ray scattering pattern, leading to the determination of their radius size distribution using (i) the generalized indirect Fourier transformation method, (ii) classical model fitting using SASfit and (iii) a Monte Carlo fitting approach using McSAS...
October 1, 2017: Journal of Applied Crystallography
Dawn Prentice, Veronique Boscart, Katherine S McGilton, Astrid Escrig
In long-term care facilities (LTCF), registered nurses (RNs) perform both clinical and supervisory roles as part of a team aiming to provide high-quality care to residents. The residents have several co-morbidities and complex care needs. Unfortunately, new RNs receive minimal preparation in gerontology and supervisory experience during their program, leading to low retention rates and affecting resident outcomes. This qualitative study explored factors that influence supervisory performance of new RNs in LTCF from the perspective of 24 participants from Ontario, Canada...
October 11, 2017: Canadian Journal on Aging, la Revue Canadienne du Vieillissement
Janice E Hawkins, Lynn L Wiles, Karen Karlowicz, Kimberly Adams Tufts
Increasing the number of BSN-prepared nurses at the bedside is directly linked to improved health care outcomes. However, employers are challenged to find enough BSN graduates to meet workforce demands. This article presents an educational model that uses evidence-based practices to increase enrollment, retention, and graduation rates of RN students in a BSN program (RN-BSN) in a resource limited rural community. This exemplar may equip nurse educators with strategies to adopt in their own communities.
October 5, 2017: Nurse Educator
Lili Gao, Zhihong Jiang, Zhaocheng Cai, Ming Cai, Qing Zhang, Yingying Ma, Guoliang Li, Fengzhu Zhao, Qiang Ma
The aim of the present study was to analyze brain and body iron levels among patients with mild cognitive impairment (MCI), Alzheimer's disease (AD), and normal controls (NCs). A total of 90 participants (30 MCI, 30 AD, 30 NC) were enrolled. Brain iron content was quantified using susceptibility weighted imaging (SWI). Phase values were used to calculate bilateral iron content in the hippocampus (HP), substantia nigra, red nucleus (RN), dentate nucleus (DN), caudate nucleus (CN), globus pallidus (GP), putamen (PUT), frontal white matter, temporal cortex (TC), and parietal cortex...
September 29, 2017: Molecular Medicine Reports
Mitsutoshi Kitao, Hisanori Harayama, Akira Uemura
We propose a novel approach to determine the coefficient of CO2 diffusional leakage (k_CO2 ) in the chamber of a portable open gas exchange system (Li-6400, Li-Cor Inc., NE, USA) using intact leaves. Assuming that dark respiration rate (Rn ) is constant at various CO2 concentrations, at least in a short term, k_CO2 should be the value that makes the leak-corrected Rn constant. We used 2 representative tree species native to northern Japan, Japanese white birch (Betula platyphylla var. japonica) and Japanese oak (Quercus mongolica var...
October 6, 2017: Plant, Cell & Environment
Francisco Navarro-Martinez, Alejandro Salas Garcia, Francisco Sánchez-Martos, Antonio Baeza Espasa, Luis Molina Sánchez, Antonio Rodríguez Perulero
The identification of specific aquifers that supply water to river systems is fundamental to understanding the dynamics of the rivers' hydrochemistry, particularly in arid and semiarid environments where river flow may be discontinuous. There are multiple methods to identify the source of river water. In this study of the River Andarax, in the Southeast of Spain, an analysis of natural tracers (physico-chemical parameters, uranium, radium and radon) in surface water and groundwater indicates that chemical parameters and uranium clearly identify the areas where there is groundwater-surface water interaction...
October 2, 2017: Journal of Environmental Radioactivity
Anna Larissa Cortês da Silva, Karla Danielly da Silva Ribeiro, Larisse Rayanne Miranda de Melo, Dalila Fernandes Bezerra, Jaluza Luana Carvalho de Queiroz, Mayara Santa Rosa Lima, Jeane Franco Pires, Danielle Soares Bezerra, Mônica Maria Osório, Roberto Dimenstein
OBJECTIVES: To determine the alpha-tocopherol concentration in breast milk at different periods of lactation and to estimate the possible supply of vitamin E to the infant. METHODS: A longitudinal observational study was carried out with 100 mothers at University Hospital Ana Bezerra (HUAB), at Universidade Federal do Rio Grande do Norte, in Santa Cruz (RN), Northeast Brazil. Samples of colostrum (n=100), transitional milk (n=77), and mature milk (n=63) were collected...
April 2017: Revista Paulista de Pediatria: Orgão Oficial da Sociedade de Pediatria de São Paulo
Isabelle Ribeiro Barbosa, Alessandre de Medeiros Tavares, Úrsula Priscila da Silva Torres, Carlos André do Nascimento, Márcia Cristina Bernardo de Melo Moura, Valderi Barbosa Vieira, Josélio Maria Galvão de Araújo, Renata Antonacci Gama
OBJECTIVE: to report the vigi@dengue experience, held in the municipality of Natal-RN, Brazil, from October/2015 to May/2016. METHODS: entomological indicators were obtained from the oviposition traps, epidemiological indicators from notifications on the online Information System for Notifiable Diseases (Sinan-dengue), active search for cases and viral RNA detection (RTq-PCR) in arthropods and human serum samples; risk levels have been created based on these indicators; categories of interventions for each risk level have been established...
July 2017: Epidemiologia e Servicos de Saude: Revista do Sistema Unico de Saude do Brasil
Luiz Eduardo Lima de Andrade, Laiza Oliveira Mendes de Melo, Ivanise Gomes da Silva, Roselma Marinho de Souza, André Luiz Barbosa de Lima, Marise Reis de Freitas, Almária Mariz Batista, Zenewton André da Silva Gama
OBJECTIVE: to adapt the Hospital Survey on Patient Safety Culture (HSOPSC) to the Brazilian context and validate a computer program that facilitates the collection and analysis of data in hospitals with different types of management. METHODS: methodological study developed in six hospitals in Natal-RN, Brazil; a software which allows data collection via e-mail, cloud storage and automatic data report was developed; validity was verified through confirmatory factor analysis and reliability, through consistency analysis with Cronbach's alpha...
July 2017: Epidemiologia e Servicos de Saude: Revista do Sistema Unico de Saude do Brasil
Minyong Kang, Chun Tae Chang, Hyun Hwan Sung, Hwang Gyun Jeon, Byong Chang Jeong, Seong Il Seo, Seong Soo Jeon, Han Yong Choi, Hyun Moo Lee
BACKGROUND: This study aimed to examine the prognostic role of Prognostic Nutritional Index (PNI) dynamics in the pre- and postoperative periods for patients with renal cell carcinoma (RCC) who undergo radical nephrectomy (RN). METHODS: The study analyzed 324 patients with RCC who underwent RN. The overall population was classified into four groups according to four types of pre- to postoperative PNI dynamics as follows: group 1 (low → low PNI), group 2 (low → high PNI), group 3 (high → low PNI), and group 4 (high → high PNI)...
October 3, 2017: Annals of Surgical Oncology
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