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https://www.readbyqxmd.com/read/29348058/elemental-assessment-of-vegetation-via-portable-x-ray-fluorescence-pxrf-spectrometry
#1
Candice McGladdery, David C Weindorf, Somsubhra Chakraborty, Bin Li, Laura Paulette, Dorina Podar, Delaina Pearson, Nana Yaw O Kusi, Bogdan Duda
Elemental concentrations in vegetation are of critical importance, whether establishing plant essential element concentrations (toxicity vs. deficiency) or investigating deleterious elements (e.g., heavy metals) differentially extracted from the soil by plants. Traditionally, elemental analysis of vegetation has been facilitated by acid digestion followed by quantification via inductively coupled plasma (ICP) or atomic absorption (AA) spectroscopy. Previous studies have utilized portable X-ray fluorescence (PXRF) spectroscopy to quantify elements in soils, but few have evaluated the vegetation...
January 15, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29346380/rapidly-progressive-dementia-an-eight-year-2008-2016-retrospective-study
#2
Patil Anuja, Vishnu Venugopalan, Naheed Darakhshan, Pandit Awadh, Vinny Wilson, Goyal Manoj, Modi Manish, Lal Vivek
BACKGROUND AND PURPOSE: Rapidly progressive dementia (RPD) is an emergency in cognitive neurology, defined as cognitive impairment affecting the daily living activities developed over less than 1 year. This study investigated the profile of patients with rapidly progressive dementia at first presentation. METHODS: Retrospective case analysis was done in 187 patients with rapidly progressive dementia who presented to the Postgraduate Institute of Medical Education and Research, Chandigarh, India from January 2008 to August 2016...
2018: PloS One
https://www.readbyqxmd.com/read/29339977/necessity-for-retrospective-evaluation-of-past-positive-chemicals-in-in-vitro-chromosomal-aberration-tests-using-recommended-cytotoxicity-indices
#3
Hiroshi Honda, Yurika Fujita, Toshio Kasamatsu, Anne Fuchs, Rolf Fautz, Osamu Morita
We have demonstrated that retrospective evaluation of existing data of in vitro chromosomal aberration test using the new cytotoxicity indices RICC (relative increase in cell count) or RPD (relative population doubling) reduces the false-positive rate. We have constructed an algorithm to predict the likelihood that past-positive results would differ when retested accordingly. Here, we emphasize the importance of reviewing existing in vitro chromosomal aberration test results. The present Letter not only supports the rediscovery of potentially useful chemicals excluded from further development as a result of misclassification due to in vitro false-positive results, but also contributes to the development of a precise Quantitative Structure-Activity Relationship (QSAR) model by providing an appropriate training data-set...
2018: Genes and Environment: the Official Journal of the Japanese Environmental Mutagen Society
https://www.readbyqxmd.com/read/29332104/assessment-of-the-fit-of-removable-partial-denture-fabricated-by-computer-aided-designing-computer-aided-manufacturing-technology
#4
Khalid A O Arafa
To assess the level of evidence that supports the quality of fit for removable partial denture (RPD) fabricated by computer-aided designing/computer aided manufacturing (CAD/CAM) and rapid prototyping (RP) technology. Methods: An electronic search was performed in Google Scholar, PubMed, and Cochrane library search engines, using Boolean operators. All articles published in English and published in the period from 1950 until April 2017 were eligible to be included in this review. The total number of articles contained the search terms in any part of the article (including titles, abstracts, or article texts) were screened, which resulted in 214 articles...
January 2018: Saudi Medical Journal
https://www.readbyqxmd.com/read/29287354/prediction-of-banana-color-and-firmness-using-a-novel-wavelengths-selection-method-of-hyperspectral-imaging
#5
Chuanqi Xie, Bingquan Chu, Yong He
This study investigated the feasibility of using hyperspectral imaging for determining banana color (L∗, a∗ and b∗) and firmness as well as classifying ripe and unripe samples. The hyperspectral images at wavelengths 380-1023nm were acquired. Partial least squares (PLS) models were built to predict color and firmness. Two-wavelength combination method λi-λjλi+λj,λi2-λj2λi2+λj2,λiλjandλi-λj was used to identify the effective wavelengths. Based on the selected wavelengths, PLS models obtained good results with the coefficient of determination in prediction (Rp2) of 0...
April 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29280014/robotic-assisted-versus-laparoscopic-pancreaticoduodenectomy-oncological-outcomes
#6
Ibrahim Nassour, Michael A Choti, Matthew R Porembka, Adam C Yopp, Sam C Wang, Patricio M Polanco
BACKGROUND: Minimally invasive pancreaticoduodenectomy (MIPD) is being performed with increasing frequency for pancreatic cancer, but the most oncologically efficacious surgical platform, whether robotic or laparoscopic, is yet to be determined. Currently, there are no national studies comparing the oncological outcomes between robotic (RPD) and laparoscopic (LPD) pancreaticoduodenectomy. METHODS: This was a retrospective study using the National Cancer Database between 2010 and 2013...
December 26, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/29248234/technical-note-near-infrared-reflectance-spectroscopy-to-predict-fecal-indigestible-neutral-detergent-fiber-for-dairy-cows
#7
N Brogna, A Palmonari, G Canestrari, L Mammi, A Dal Prà, A Formigoni
In vitro and in situ procedures performed to estimate indigestible neutral detergent fiber (iNDF) in forage or fecal samples are time consuming, costly, and limited by intrinsic factors. In contrast, near infrared reflectance spectroscopy (NIRS) has become widely recognized as a valuable tool for accurately determining chemical composition and digestibility parameters of forages. The aim of this study was to build NIRS calibrations and equations for fecal iNDF. In total, 1,281 fecal samples were collected to build a calibration data set, but only 301 were used to develop equations...
December 13, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29248070/residents-as-preceptors-and-educators-what-we-can-learn-from-a-national-survey-to-improve-our-residency-programs
#8
Bethany A DiPaula, Rima A Mohammad, Phil Ayers, Vicki Basalyga, Aaron Burton, Colleen Bush, Kate Farthing, Vincent D Marshall, Bhavik M Shah
INTRODUCTION: Developing pharmacy residents into effective preceptors is essential to meet the demands of pharmacy education. A survey was created to assess the availability of resident precepting educational opportunities, identify common barriers associated with developing preceptors' skills, and discover strategies to optimize programming. METHODS: An online survey focused on the development of residents as preceptors was e-mailed to all residency program directors (RPD) for American Society of Health-System Pharmacists accredited residencies in the United States...
January 2018: Currents in Pharmacy Teaching & Learning
https://www.readbyqxmd.com/read/29237169/outer-retina-and-choroidal-thickness-in-intermediate-age-related-macular-degeneration-reticular-pseudodrusen-findings
#9
Pedro Camacho, Marco Dutra-Medeiros, Diogo Cabral, Rufino Silva
PURPOSE: To evaluate outer retina and choroidal thickness in subjects with intermediate age-related macular degeneration (iAMD) and to describe associations with the presence of reticular pseudodrusen (RPD). METHODS: This was a retrospective, cross-sectional analysis of 157 consecutive eyes (specifically: 62 eyes classified as having RPD and 95 eyes with drusen ≥125 µm). Only cases with digital color fundus photographs, red-free, and infrared, obtained and graded according to the Age-Related Eye Disease Study to define iAMD, were used for this study...
December 14, 2017: Ophthalmic Research
https://www.readbyqxmd.com/read/29236343/relationship-between-reticular-pseudodrusen-and-choroidal-thickness-in-intermediate-age-related-macular-degeneration
#10
Chi Yun Doreen Ho, Jia Jia Lek, Khin Zaw Aung, Myra B McGuinness, Chi D Luu, Robyn H Guymer
IMPORTANCE: Reticular pseudodrusen (RPD) is strongly associated with late age-related macular degeneration (AMD) but their etiology remains unknown. RPD have been associated with reduced choroidal thickness but most studies are limited by small sample size and varying severity of AMD. BACKGROUND: To investigate the relationship between choroidal thickness (ChT) and RPD in eyes with intermediate AMD (iAMD), controlling for variables known to influence ChT. DESIGN: Retrospective cohort study PARTICIPANTS: Participants were recruited from Centre for Eye Research Australia...
December 13, 2017: Clinical & Experimental Ophthalmology
https://www.readbyqxmd.com/read/29234462/a-precise-and-consistent-assay-for-major-wall-polymer-features-that-distinctively-determine-biomass-saccharification-in-transgenic-rice-by-near-infrared-spectroscopy
#11
Jiangfeng Huang, Ying Li, Yanting Wang, Yuanyuan Chen, Mingyong Liu, Youmei Wang, Ran Zhang, Shiguang Zhou, Jingyang Li, Yuanyuan Tu, Bo Hao, Liangcai Peng, Tao Xia
Background: The genetic modification of plant cell walls has been considered to reduce lignocellulose recalcitrance in bioenergy crops. As a result, it is important to develop a precise and rapid assay for the major wall polymer features that affect biomass saccharification in a large population of transgenic plants. In this study, we collected a total of 246 transgenic rice plants that, respectively, over-expressed and RNAi silenced 12 genes of the OsGH9 and OsGH10 family that are closely associated with cellulose and hemicellulose modification...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/29228026/rapid-analyses-of-dry-matter-content-and-carotenoids-in-fresh-cassava-roots-using-a-portable-visible-and-near-infrared-spectrometer-vis-nirs
#12
Ugochukwu N Ikeogu, Fabrice Davrieux, Dominique Dufour, Hernan Ceballos, Chiedozie N Egesi, Jean-Luc Jannink
Portable Vis/NIRS are flexible tools for fast and unbiased analyses of constituents with minimal sample preparation. This study developed calibration models for dry matter content (DMC) and carotenoids in fresh cassava roots using a portable Vis/NIRS system. We examined the effects of eight data pre-treatment combinations on calibration models and assessed calibrations on processed and intact root samples. We compared Vis/NIRS derived-DMC to other phenotyping methods. The results of the study showed that the combination of standard normal variate and de-trend (SNVD) with first derivative calculated on two data points and no smoothing (SNVD+1111) was adequate for a robust model...
2017: PloS One
https://www.readbyqxmd.com/read/29223458/determination-of-zinc-oxide-content-of-mineral-medicine-calamine-using-near-infrared-spectroscopy-based-on-miv-and-bp-ann-algorithm
#13
Xiaodong Zhang, Long Chen, Yangbo Sun, Yu Bai, Bisheng Huang, Keli Chen
Near-infrared (NIR) spectroscopy has been widely used in the analysis fields of traditional Chinese medicine. It has the advantages of fast analysis, no damage to samples and no pollution. In this research, a fast quantitative model for zinc oxide (ZnO) content in mineral medicine calamine was explored based on NIR spectroscopy. NIR spectra of 57 batches of calamine samples were collected and the first derivative (FD) method was adopted for conducting spectral pretreatment. The content of ZnO in calamine sample was determined using ethylenediaminetetraacetic acid (EDTA) titration and taken as reference value of NIR spectroscopy...
December 5, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29194016/assessment-of-occupational-exposure-to-asbestos-fibers-contribution-of-analytical-transmission-electron-microscopy-analysis-and-comparison-with-phase-contrast-microscopy
#14
Céline Eypert-Blaison, Anita Romero-Hariot, Frédéric Clerc, Raymond Vincent
From November 2009 until October 2010, the French general directorate for labour organised a large field-study using analytical transmission electron microscopy (ATEM) to characterise occupational exposure to asbestos fibers during work on asbestos containing materials (ACM). The primary objective of this study was to establish a method and to validate the feasibility of using ATEM for the analysis of airborne asbestos of individual filters sampled in various occupational environments. For each sampling event, ATEM data were compared to those obtained by phase-contrast optical microscopy (PCOM), the WHO-recommended reference technique...
December 1, 2017: Journal of Occupational and Environmental Hygiene
https://www.readbyqxmd.com/read/29183703/a-comparison-of-outcomes-between-open-laparoscopic-and-robotic-pancreaticoduodenectomy
#15
Asha M Zimmerman, Dean G Roye, Kevin P Charpentier
BACKGROUND: The advantages and comparison of minimally invasive techniques for pancreaticoduodenectomies have not been fully explored using large national multicenter data. STUDY DESIGN: A retrospective review of NSQIP targeted data from 2014 to 2015 was performed. Demographics and outcomes were compared between open (OPD), laparoscopic (LPD) and robotic pancreaticoduodenectomies (RPD). RESULTS: Of 6827 pancreaticoduodenectomies, 6336 (92...
November 25, 2017: HPB: the Official Journal of the International Hepato Pancreato Biliary Association
https://www.readbyqxmd.com/read/29177712/laser-photocoagulation-as-treatment-of-non-exudative-age-related-macular-degeneration-state-of-the-art-and-future-perspectives
#16
Giuseppe Querques, Maria Vittoria Cicinelli, Alessandro Rabiolo, Luigi de Vitis, Riccardo Sacconi, Lea Querques, Francesco Bandello
PURPOSE: To give an updated review of laser approaches to non-exudative age-related macular degeneration (AMD). METHODS: PubMed and Medline database searches were carried out using the terms "laser" and "photocoagulation" associated with "age-related macular degeneration", and latest publications up to May 2017 have been reviewed. Moreover, the design of an ongoing single-center, non-randomized, phase I-II, pilot study, the PASCAL-GA trial, coordinated by F. Bandello, MD and G...
November 25, 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/29150745/alignment-in-the-transverse-plane-but-not-sagittal-or-coronal-plane-affects-the-risk-of-recurrent-patella-dislocation
#17
Shigeru Takagi, Takashi Sato, Satoshi Watanabe, Osamu Tanifuji, Tomoharu Mochizuki, Go Omori, Naoto Endo
PURPOSE: Abnormalities of lower extremity alignment (LEA) in recurrent patella dislocation (RPD) have been studied mostly by two-dimensional (2D) procedures leaving three-dimensional (3D) factors unknown. This study aimed to three-dimensionally examine risk factors for RPD in lower extremity alignment under the weight-bearing conditions. METHODS: The alignment of 21 limbs in 15 RPD subjects was compared to the alignment of 24 limbs of 12 healthy young control subjects by an our previously reported 2D-3D image-matching technique...
November 17, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29143451/using-intraoral-scanning-technology-for-three-dimensional-printing-of-kennedy-class-i-removable-partial-denture-metal-framework-a-clinical-report
#18
Feng Hu, Zhenhua Pei, Ying Wen
Removable partial dentures (RPDs) are used to restore missing teeth and are traditionally fabricated using the lost-wax casting technique. The casting process is arduous, time-consuming, and requires a skilled technician. The development of intraoral scanning and 3D printing technology has made rapid prototyping of the RPD more achievable. This article reports a completed case of direct fabrication of a maxillary RPD metal framework (Kennedy Class I) using intraoral scanning and 3D printing techniques. Acceptable fit and satisfactory clinical outcome were demonstrated...
November 16, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29136844/physicochemical-characterization-of-lavandula-spp-honey-with-ft-raman-spectroscopy
#19
Ofélia Anjos, António J A Santos, Vasco Paixão, Letícia M Estevinho
This study aimed to evaluate the potential of FT-Raman spectroscopy in the prediction of the chemical composition of Lavandula spp. monofloral honey. Partial Least Squares (PLS) regression models were performed for the quantitative estimation and the results were correlated with those obtained using reference methods. Good calibration models were obtained for electrical conductivity, ash, total acidity, pH, reducing sugars, hydroxymethylfurfural (HMF), proline, diastase index, apparent sucrose, total flavonoids content and total phenol content...
February 1, 2018: Talanta
https://www.readbyqxmd.com/read/29127788/rapid-prediction-of-total-petroleum-hydrocarbons-concentration-in-contaminated-soil-using-vis-nir-spectroscopy-and-regression-techniques
#20
R K Douglas, S Nawar, M C Alamar, A M Mouazen, F Coulon
Visible and near infrared spectrometry (vis-NIRS) coupled with data mining techniques can offer fast and cost-effective quantitative measurement of total petroleum hydrocarbons (TPH) in contaminated soils. Literature showed however significant differences in the performance on the vis-NIRS between linear and non-linear calibration methods. This study compared the performance of linear partial least squares regression (PLSR) with a nonlinear random forest (RF) regression for the calibration of vis-NIRS when analysing TPH in soils...
November 8, 2017: Science of the Total Environment
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