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https://www.readbyqxmd.com/read/29778250/surgical-management-of-intraductal-papillary-mucinous-neoplasm-with-main-duct-involvement-an-international-expert-survey-and-case-vignette-study
#1
Lianne Scholten, Nadine C M van Huijgevoort, Marco J Bruno, Carlos Fernandez-Del Castillo, Sohei Satoi, Alain Sauvanet, Christopher Wolfgang, Paul Fockens, Suresh T Chari, Marco Del Chiaro, Jeanin E van Hooft, Marc G Besselink
BACKGROUND: The risk of invasive cancer in resected intraductal papillary mucinous neoplasm with main pancreatic duct involvement is 33%-60%. Most guidelines, therefore, advise resection of main duct intraductal papillary mucinous neoplasm and mixed type intraductal papillary mucinous neoplasm in surgically fit patients, although advice on the surgical strategy (partial or total pancreatectomy) differs. We performed a survey amongst international experts to guide the design of future studies and help to prepare for a single international set of guidelines...
May 16, 2018: Surgery
https://www.readbyqxmd.com/read/29778170/removal-of-pb-ii-from-aqueous-solutions-using-waste-textiles-poly-acrylic-acid-composite-synthesized-by-radical-polymerization-technique
#2
Tao Zhou, Fafa Xia, Yue Deng, Youcai Zhao
Waste textiles (WTs) are the inevitable outcome of human activity and should be separated and recycled in view of sustainable development. In this work, WT was modified through grafting with acrylic acid (AA) via radical polymerization process using ceric ammonium nitrate (CAN) as an initiator and microwave and/or UV irradiation as energy supply. The acrylic acid-grafted waste textiles (WT-g-AA) thus obtained was then used as an adsorbent to remove Pb(II) from Pb(II)-containing wastewater. The effects of pH, initial concentrations of Pb(II) and adsorbent dose were investigated, and around 95% Pb(II) can be removed from the aqueous solution containing 10mg/L at pH6...
May 2018: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29778142/behaviors-and-kinetics-of-toluene-adsorption-desorption-on-activated-carbons-with-varying-pore-structure
#3
Xi Yang, Honghong Yi, Xiaolong Tang, Shunzheng Zhao, Zhongyu Yang, Yueqiang Ma, Tiecheng Feng, Xiaoxu Cui
This work was undertaken to investigate the behaviors and kinetics of toluene adsorption and desorption on activated carbons with varying pore structure. Five kinds of activated carbon from different raw materials were selected. Adsorption isotherms and breakthrough curves for toluene were measured. Langmuir and Freundlich equations were fitted to the equilibrium data, and the Freundlich equation was more suitable for simulating toluene adsorption. The process consisted of monolayer, multilayer and partial active site adsorption types...
May 2018: Journal of Environmental Sciences (China)
https://www.readbyqxmd.com/read/29777494/residue-behavior-and-risk-assessment-of-thifluzamide-in-the-maize-field-ecosystem
#4
Cong Ma, Zhongdong Liu, Yan Qi, Shanshan Wang, Xiaolin Cao, Jing Wang, Yongxin She, Yong Shao, Jitai Shen, Chao Zhang, Zejun Jiang
In the present work, the dissipation kinetics and final residue levels of thifluzamide in the maize field ecosystem were investigated. Using a modified quick, easy, cheap, effective, rugged, and safe (QuEChERS) extraction combined with liquid chromatography-tandem mass spectrometric detection (LC-MS/MS), a rapid, sensitive, efficient, and reliable method for extraction and quantitative analysis of thifluzamide residues in maize grain, maize plant, and soil was developed. Satisfactory recoveries of 78.7-97.0% were achieved with relative standard deviations (RSDs) in the range of 1...
May 18, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29777317/using-smiles-strings-for-the-description-of-chemical-connectivity-in-the-crystallography-open-database
#5
Miguel Quirós, Saulius Gražulis, Saulė Girdzijauskaitė, Andrius Merkys, Antanas Vaitkus
Computer descriptions of chemical molecular connectivity are necessary for searching chemical databases and for predicting chemical properties from molecular structure. In this article, the ongoing work to describe the chemical connectivity of entries contained in the Crystallography Open Database (COD) in SMILES format is reported. This collection of SMILES is publicly available for chemical (substructure) search or for any other purpose on an open-access basis, as is the COD itself. The conventions that have been followed for the representation of compounds that do not fit into the valence bond theory are outlined for the most frequently found cases...
May 18, 2018: Journal of Cheminformatics
https://www.readbyqxmd.com/read/29776341/different-adaptive-strategies-in-e-coli-populations-evolving-under-macronutrient-limitation-and-metal-ion-limitation
#6
Omar M Warsi, Dan I Andersson, Daniel E Dykhuizen
BACKGROUND: Adaptive responses to nutrient limitation involve mutations that increase the efficiency of usage or uptake of the limiting nutrient. However, starvation of different nutrients has contrasting effects on physiology, resulting in different evolutionary responses. Most studies performed to understand these evolutionary responses have focused only on macronutrient limitation. Hence our understanding of adaptation under limitation of other forms of nutrients is limited. In this study, we compared the evolutionary response in populations evolving under growth-limiting conditions for a macronutrient and a major cation...
May 18, 2018: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/29776085/yielding-of-a-model-glass-former-an-interpretation-with-an-effective-system-of-icosahedra
#7
Rhiannon Pinney, Tanniemola B Liverpool, C Patrick Royall
We consider the yielding under simple shear of a binary Lennard-Jones glass former whose super-Arrhenius dynamics are correlated with the formation of icosahedral structures. We recast this glass former as an effective system of icosahedra [Pinney et al., J. Chem. Phys. 143, 244507 (2015)JCPSA60021-960610.1063/1.4938424]. Looking at the small-strain region of sheared simulations, we observe that shear rates affect the shear localization behavior particularly at temperatures below the glass transition as defined with a fit to the Vogel-Fulcher-Tamman equation...
March 2018: Physical Review. E
https://www.readbyqxmd.com/read/29775407/effect-of-healthy-aging-and-sex-on-middle-cerebral-artery-blood-velocity-dynamics-during-moderate-intensity-exercise
#8
Jaimie L Ward, Jesse C Craig, Yumei Liu, Eric Dennis Vidoni, Rebecca Malesky, David C Poole, Sandra A Billinger
Cerebral blood flow (CBF) velocity measured in the middle cerebral artery (MCAV ) increases with finite kinetics during moderate intensity exercise and both the amplitude and dynamics of the response provide invaluable insights into the controlling mechanisms. The MCAV response following exercise onset is well fit to an exponential model in young individuals but remains to be characterized in their older counterparts. The responsiveness of vasomotor control degrades with advancing age, especially in skeletal muscle, and we tested the hypothesis that older subjects would evince a slower and reduced MCAV response to exercise...
May 18, 2018: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29775402/a-note-on-poisson-goodness-of-fit-tests-for-ionizing-radiation-induced-chromosomal-aberration-samples
#9
Manuel Higueras, J E González, Marina Di Giorgio, J F Barquinero
PURPOSE: To present Poisson exact goodness-of-fit tests as alternatives and complements to the asymptotic u-test, which is the most widely used in cytogenetic biodosimetry, to decide whether a sample of chromosomal aberrations in blood cells comes from an homogeneous or inhomogeneous exposure. MATERIALS AND METHODS: Three Poisson exact goodness-of-fit test from the literature are introduced and implemented in the R environment. A Shiny R Studio application, named GOF Poisson, has been updated for the purpose of giving support to this work...
May 18, 2018: International Journal of Radiation Biology
https://www.readbyqxmd.com/read/29774260/can-the-uk-s-birth-registration-system-better-serve-the-interests-of-those-born-following-collaborative-assisted-reproduction
#10
Marilyn A Crawshaw, Eric D Blyth, Julia Feast
Current birth registration systems fail to serve adequately the interests of those born as a result of gamete and embryo donation and surrogacy. In the UK, changes to the birth registration system have been piecemeal, reactive and situation-specific and no information is recorded about gamete donors. Birth registration has thereby become a statement of legal parentage and citizenship only, without debate as to whether it should serve any wider functions. This sits uneasily with the increasingly accepted human right to know one's genetic and gestational as well as legal parents, and the duty of the State to facilitate that right...
June 2017: Reproductive Biomedicine & Society Online
https://www.readbyqxmd.com/read/29773925/predictors-of-nest-growth-diminishing-returns-for-subordinates-in-the-paper-wasp-polistes-dominula
#11
Lena Grinsted, Jeremy Field
Abstract: In cooperative breeders, subordinates that have alternative reproductive options are expected to stay and help dominant breeders only as long as they contribute to group productivity, if their fitness is linked with colony success. Female Polistes dominula paper wasps live as cooperative breeders in small groups of typically fewer than 10 females. Subordinates tend to have high-quality outside options, and so could choose alternative breeding tactics if their work efforts increased productivity negligibly...
2018: Behavioral Ecology and Sociobiology
https://www.readbyqxmd.com/read/29772882/correlation-analysis-of-air-pollutant-index-levels-and-dengue-cases-across-five-different-zones-in-selangor-malaysia
#12
Loshini Thiruchelvam, Sarat C Dass, Rafdzah Zaki, Abqariyah Yahya, Vijanth S Asirvadam
This study investigated the potential relationship between dengue cases and air quality - as measured by the Air Pollution Index (API) for five zones in the state of Selangor, Malaysia. Dengue case patterns can be learned using prediction models based on feedback (lagged terms). However, the question whether air quality affects dengue cases is still not thoroughly investigated based on such feedback models. This work developed dengue prediction models using the autoregressive integrated moving average (ARIMA) and ARIMA with an exogeneous variable (ARIMAX) time series methodologies with API as the exogeneous variable...
May 7, 2018: Geospatial Health
https://www.readbyqxmd.com/read/29770503/a-novel-phase-unwrapping-method-by-using-phase-jump-detection-and-local-surface-fitting-application-to-dixon-water-fat-mri
#13
Junying Cheng, Jijing Guan, Yingjie Mei, Lin Xu, Xiaoyun Liu, Qianjin Feng, Wufan Chen, Yanqiu Feng
PURPOSE: This study aims to develop an accurate and robust phase-unwrapping method that works effectively under severe noise, rapid-varying phase, and disconnected regions for water-fat Dixon MRI. METHODS: The proposed method first segments the phase map into blocks by automatically detecting phase jumps, and then clusters the pixels near phase jumps into residual pixels. Thereafter, the proposed method sequentially performs intrablock, interblock, and residual-pixel unwrapping using the local surface fitting approach...
May 16, 2018: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/29769111/predictors-of-back-disorder-among-almeda-textile-factory-workers-north-ethiopia
#14
Teklehaymanot Huluf Abraha, Asmelash Tekie Demoz, Haimanot Gebrehiwot Moges, Ansha Nega Ahmmed
OBJECTIVES: To guide the development of targeted interventions for the prevention of work-related back pain, this manuscript estimates the prevalence of back pain and its association with a variety of risk factors among Almeda textile factory production works from March to April 2015. An institutional-based cross-sectional study was carried out in Almeda textile factory, North Ethiopia. Randomly selected workers were administered a structured questionnaire about their socio-economic status, lifestyle, working conditions, back pain and selected risk factors...
May 16, 2018: BMC Research Notes
https://www.readbyqxmd.com/read/29768942/updated-meta-review-of-evidence-on-support-for-carers
#15
Jane Dalton, Sian Thomas, Melissa Harden, Alison Eastwood, Gillian Parker
Objective To update a 2010 meta-review of systematic reviews of effective interventions to support carers of ill, disabled, or older adults. In this article, we report the most promising interventions based on the best available evidence. Methods Rapid meta-review of systematic reviews published from January 2009 to 2016. Results Sixty-one systematic reviews were included (27 high quality, 25 medium quality, and nine low quality). The quality of reviews has improved since the original review, but primary studies remain limited in quality and quantity...
January 1, 2018: Journal of Health Services Research & Policy
https://www.readbyqxmd.com/read/29768724/on-the-simultaneous-identification-and-quantification-of-microalgae-populations-based-on-fluorometric-techniques
#16
Natalia S Gsponer, M Claudia Rodríguez, Rodrigo E Palacios, Carlos A Chesta
In this study, the phytoplankton structure of a freshwater reservoir located in central Argentina (Embalse Río Tercero) was analyzed using Beutler's method (Photosynthesis Research 72: 39-53, 2002), aiming to provide water quality control agencies with a reliable tool for early detection of algae blooms, particularly cyanobacteria. The method estimates the concentration of chlorophyll a (Chl a) contributed by individual algal groups in a real sample by fitting its fluorescence excitation spectrum to a linear combination of norm spectra of relevant algae groups...
May 16, 2018: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/29765318/utility-of-a-novel-three-dimensional-and-dynamic-3dd-cell-culture-system-for-pk-pd-studies-evaluation-of-a-triple-combination-therapy-at-overcoming-anti-her2-treatment-resistance-in-breast-cancer
#17
Anusha Ande, Tanaya R Vaidya, Bao N Tran, Michael Vicchiarelli, Ashley N Brown, Sihem Ait-Oudhia
Background: Emergence of Human epidermal growth factor receptor 2 (HER2) therapy resistance in HER2-positive (HER2+) breast cancer (BC) poses a major clinical challenge. Mechanisms of resistance include the over-activation of the PI3K/mTOR and Src pathways. This work aims to investigate a novel combination therapy that employs paclitaxel (PAC), a mitotic inhibitor, with everolimus (EVE), an mTOR inhibitor, and dasatinib (DAS), an Src kinase inhibitor, as a modality to overcome resistance. Methods: Static (two dimensional, 2D) and three-dimensional dynamic (3DD) cell culture studies were conducted using JIMT-1 cells, a HER2+ BC cell line refractory to HER2 therapies...
2018: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29762858/evaluation-of-cardiovascular-risk-profile-a-comparative-analysis-between-cuore-algorithm-and-the-framingham-risk-scores
#18
G La Torre, V Palmeri, L Pagano, G Nati, S Sernia, A Mannocci
OBJECTIVE: Coronary heart diseases (CHD) are the leading cause of premature death and loss of disability adjusted life years in Europe. In order to implement appropriate health interventions as preventive tools, it is necessary to understand the epidemiological stratification of cardiovascular risk and the specific situation of each individual reality. This study investigates the reliability of two algorithms used to assess cardiovascular risk: the Framingham algorithm and the CUORE algorithm...
April 2018: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29762625/an-asymmetric-fitting-function-for-condensed-phase-raman-spectroscopy
#19
Vitaly I Korepanov, Daria M Sedlovets
Asymmetric lineshapes are experimentally observed in the Raman spectra of different classes of condensed matter. Determination of the peak parameters, typically done with symmetric pseudo-Voigt functions, in such situations yields unreliable results. While a wide choice of asymmetric fitting functions is possible, for the function to be practically useful, it should satisfy several criteria: simple analytic form, minimum parameters, description of the symmetric shape as "zero case", estimation of the desired peak parameters in a straightforward way and, above all, adequate description of the experimental data...
May 15, 2018: Analyst
https://www.readbyqxmd.com/read/29762535/leveraging-energy-harvesting-and-wake-up-receivers-for-long-term-wireless-sensor-networks
#20
Fayçal Ait Aoudia, Matthieu Gautier, Michele Magno, Olivier Berder, Luca Benini
Wireless sensor nodes are traditionally powered by individual batteries, and a significant effort has been devoted to maximizing the lifetime of these devices. However, as the batteries can only store a finite amount of energy, the network is still doomed to die, and changing the batteries is not always possible. A promising solution is to enable each node to harvest energy directly in its environment, using individual energy harvesters. Moreover, novel ultra-low power wake-up receivers, which allow continuous listening of the channel with negligible power consumption, are emerging...
May 15, 2018: Sensors
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