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https://www.readbyqxmd.com/read/28239232/evidence-of-decoupling-between-arsenic-and-phosphate-in-shallow-groundwater-of-bangladesh-and-potential-implications
#1
Z Aziz, B C Bostick, Y Zheng, M R Huq, M M Rahman, K M Ahmed, A van Geen
Reductive dissolution of iron oxyhydroxides and reduction of arsenic are often invoked as leading causes of high dissolved As levels in shallow groundwater of Bangladesh. The second of these assumptions is questioned here by comparing the behavior As and phosphate (P), a structural analogue for As (V) which also adsorbs strongly to Fe oxyhydroxides but is not subject to reduction. The first line of evidence is provided by a detailed groundwater time-series spanning two years for three wells in the 6-9 m depth range showing removal of As(III) from shallow groundwater during the monsoon without of loss of P...
February 2017: Applied Geochemistry: Journal of the International Association of Geochemistry and Cosmochemistry
https://www.readbyqxmd.com/read/28238432/impact-of-irrigation-based-sugarcane-cultivation-on-the-chiredzi-and-runde-rivers-quality-zimbabwe
#2
Tamuka Nhiwatiwa, Tatenda Dalu, Luc Brendonck
Agriculture is vital in sustaining human livelihoods. However, agriculture as it is currently practiced, is contributing to the degradation of freshwater ecosystems globally. We investigated impacts of irrigation return flows from sugarcane farming on water quality and health status of the Chiredzi and Runde Rivers, a biodiversity hotspot region in south-eastern Lowveld of Zimbabwe. The water quality at inlets from the crop field into the wetland system; wetland outlets into the river systems; and river sites upstream and downstream of wetland outlets were monitored during the dry and wet seasons...
February 23, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28238431/assessing-seawater-intrusion-in-an-arid-coastal-aquifer-under-high-anthropogenic-influence-using-major-constituents-sr-and-b-isotopes-in-groundwater
#3
J Mahlknecht, D Merchán, M Rosner, A Meixner, R Ledesma-Ruiz
The La Paz aquifer system (Baja California Sur, Mexico) is under severe anthropogenic pressure because of high groundwater abstraction for urban supply (city of La Paz, around 222,000 inhabitants) and irrigated agriculture (1900ha). In consequence, seawater has infiltrated the aquifer, forcing the abandonment of wells with increased salinity. The objective of this study was to assess seawater intrusion, understand the hydrogeochemical processes involved and estimate the contribution of seawater in the wells tested...
February 23, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28236536/-streptococcus-milleri-an-unusual-cause-of-skull-extensive-osteomyelitis-in-an-immunocompetent-patient
#4
C Duquenne, E Dernis, A Zehrouni, A Bizon, M Duquenne
INTRODUCTION: Streptococcus milleri (Streptococcus anginosus, intermedius and constellatus) are commensal organisms, which can become pathogenic and cause infection with frequent abscess formation, local or metastatic extension. Osteomyelitis of the skull has been rarely reported in this type of infection. CASE REPORT: Skull osteomyelitis due to Streptococcus milleri is reported in a 61-year-old immunocompetent man without any medical history, occurring 10 months after a head injury without any wound or complication at initial presentation...
February 21, 2017: La Revue de Médecine Interne
https://www.readbyqxmd.com/read/28236022/complications-of-retrograde-intrarenal-surgery-classified-by-the-modified-clavien-grading-system
#5
Yong Xu, Zhiqian Min, Shaw P Wan, Haibo Nie, Guangjun Duan
The increase in the retrograde intrarenal surgery (RIRS) has been accompanied by the increase in complications. This study identified the factors that affected the severity of the complications using the modified Clavien classification system (MCCS). Three hundred and twenty-two consecutive RIRS performed by a single surgeon were analyzed. Data collection included demographics, clinical parameters, and perioperative and postoperative complications. The rate of adverse events for each of the Clavien grades was calculated, and statistical comparisons were made...
February 24, 2017: Urolithiasis
https://www.readbyqxmd.com/read/28235889/accumulation-of-micrornas-differentially-modulated-by-drought-is-affected-by-grafting-in-grapevine
#6
Chiara Pagliarani, Marco Vitali, Manuela Ferrero, Nicola Vitulo, Marco Incarbone, Claudio Lovisolo, Giorgio Valle, Andrea Schubert
Grapevine (Vitis vinifera L.) is routinely grafted and rootstocks inducing drought tolerance represent a source for adapting vineyards to climate change in temperate areas. Our goal was to investigate drought stress effects on miRNA abundance in a drought-resistant grapevine rootstock, M4 (Vitis vinifera X Vitis berlandieri), compared with a commercial cultivar, Cabernet Sauvignon (CS), by using their auto- and reciprocal grafts. RNA extracted from roots and leaves of droughted and irrigated plants of different graft combinations was used to prepare cDNA libraries for small RNA sequencing, and to analyse miRNAs by Real Time PCR (RT-qPCR)...
February 24, 2017: Plant Physiology
https://www.readbyqxmd.com/read/28231666/-an-outbreak-of-paratyphoid-fever-in-a-county-of-yunnan-province-2010-2011
#7
S K Wang, Z G Wang, X H Zhang, B Yang, Q Wu, B Kan, Y H Zhou, R S Yang, M Y Yan
Objective: To identify the source and to comment on control program regarding an outbreak of paratyphoid A fever in a county, through field studies. Methods: Descriptive epidemiological methods were adopted to describe the epidemiological characteristics of the outbreak, which occurred in Yuanjiang county, Yunan province between 2010-2011, China. Case-control study with environmental investigation was performed to identify related risk factors and pathogens while isolation and susceptibility on the suspected pathogens were conducted...
February 10, 2017: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
https://www.readbyqxmd.com/read/28231605/endonasal-versus-external-dacryocystorhinostomy-for-nasolacrimal-duct-obstruction
#8
REVIEW
Lona Jawaheer, Caroline J MacEwen, Deepa Anijeet
BACKGROUND: A dacryocystorhinostomy (DCR) procedure aims to restore drainage of tears by bypassing a blockage in the nasolacrimal duct, through the creation of a bony ostium that allows communication between the lacrimal sac and the nasal cavity. It can be performed using endonasal or external approaches. The comparative success rates of these two approaches have not yet been established and this review aims to evaluate the relevant up-to-date research. OBJECTIVES: The primary aim of this review is to compare the success rates of endonasal DCR with that of external DCR...
February 24, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28229417/a-simplified-and-systematic-method-to-isolate-culture-and-characterize-multiple-types-of-human-dental-stem-cells-from-a-single-tooth
#9
Mohammed Bakkar, Younan Liu, Dongdong Fang, Camille Stegen, Xinyun Su, Murali Ramamoorthi, Li-Chieh Lin, Takako Kawasaki, Nicholas Makhoul, Huan Pham, Yoshinori Sumita, Simon D Tran
This chapter describes a simplified method that allows the systematic isolation of multiple types of dental stem cells such as dental pulp stem cells (DPSC), periodontal ligament stem cells (PDLSC), and stem cells of the apical papilla (SCAP) from a single tooth. Of specific interest is the modified laboratory approach to harvest/retrieve the dental pulp tissue by minimizing trauma to DPSC by continuous irrigation, reduction of frictional heat from the bur rotation, and reduction of the bur contact time with the dentin...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28229062/two-techniques-of-tonsillectomy-performed-in-identical-twins-a-case-report
#10
Ali Bagherihagh, Seyed Mousa Sadr Hossein
INTRODUCTION: Cold dissection (CD) and bipolar cautery dissection (BCD) techniques are two common surgical tonsillectomy procedures used in the clinic. Obstruction has become more prevalent as the major surgical indication and is most prominently observed in younger children. CASE REPORT: In this report, we aimed to explain the abovementioned surgical techniques in detail and compare the results in identical twins (monozygote twins). Using low energy electrocautery, irrigating the operation site continuously during cauterization, avoiding unnecessary sutures, and direct cautery to the tonsil bed are all effective measures that have diminished post-op pain in bipolar electrocautery dissection, compared to cold dissection tonsillectomy...
January 2017: Iranian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/28228625/comparison-of-triple-antibiotic-paste-removal-by-different-irrigation-techniques
#11
Hacer Aksel, Selen Küçükkaya Eren, Ahmet Serper
This study compared different irrigation techniques in triple antibiotic paste (TAP) removal from root canals. Fifty-six maxillaryanterior-teeth were filled with TAP for 28 days, and assigned into 5 experimental groups (n=10): Syringe irrigation (SI), NaviTip FX (NFX), Vibringe-Syringe irrigation (V-SI), NaviTip FX-Vibringe (V-NFX), passive ultrasonic irrigation (PUI) and positive and negative control groups (n=3 for each). Following the removal of the medicament, the remaining medicament was evaluated using 4-grade scoring-system...
February 22, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28227858/compensation-of-pulsation-artifacts-during-optical-imaging-with-and-without-cranial-chamber
#12
Alejandro Romero-Santiago, Philipp Flotho, Karsten Schwerdtfeger, Jacek Szczygielski, Matthias Hulser, Lars Haab, Daniel J Strauss, Alejandro Romero-Santiago, Philipp Flotho, Karsten Schwerdtfeger, Jacek Szczygielski, Matthias Hulser, Lars Haab, Daniel J Strauss, Daniel J Strauss, Alejandro Romero-Santiago, Jacek Szczygielski, Karsten Schwerdtfeger, Philipp Flotho, Lars Haab, Matthias Hulser
Functional Optical Imaging (OI) through the opened skull forms a group of Neuroimaging techniques characterized by a high temporal and spatial resolution on a meso-to macroscopic scale. State of the art OI experiments are generally difficult to execute, with a very timely surgical preparation preceding the experiment, that requires a skilled surgeon to mount a sealed imaging chamber onto the skull. The chamber reduces brain pulsation artifacts and swelling of the brain through movement restriction. In this work, we present preliminary results of a novel approach that does not rely on the usage of an imaging chamber with the goal to facilitate heavily the surgical animal preparation and to allow straightforward joint Electroencephalography - Optical Imaging recordings in the future...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28224760/a-tree-parenchyma-coupled-model-for-lung-ventilation-simulation
#13
N Pozin, S Montesantos, I Katz, M Pichelin, I Vignon-Clementel, C Grandmont
In this article we develop a lung-ventilation model. The parenchyma is described as an elastic homogenized media. It is irrigated by a space-filling dyadic resistive pipe network, which represents the tracheo-bronchial tree. In this model the tree and the parenchyma are strongly coupled. The tree induces an extra viscous term in the system constitutive relation, which leads, in the finite element framework, to a full matrix. We consider an efficient algorithm that takes advantage of the tree structure to enable a fast matrix-vector product computation...
February 22, 2017: International Journal for Numerical Methods in Biomedical Engineering
https://www.readbyqxmd.com/read/28224696/can-contaminated-water-be-rendered-safe-for-nasal-saline-irrigations
#14
Allison G Ordemann, James K Stanford, Donna C Sullivan, J Mark Reed
OBJECTIVES/HYPOTHESIS: To compare sterile water to three methods of sterilization (carbon filtration, boiling, and ultraviolet [UV] light) for preparation of nasal saline irrigants free of bacterial and amebic contaminants. STUDY DESIGN: Bench-top translational research and cost comparison. METHODS: Sterile water was compared to common sterilization methods. Sterile water was contaminated with known concentrations of Staphylococcus aureus, Pseudomonas aeruginosa, Moraxella catarrhalis, Acinetobacter baumannii, Klebsiella pneumonia, Legionella pneumophila, and Naegleria fowleri...
February 22, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28223875/toxic-keratitis-after-use-of-wrongly-labeled-non-ophthalmic-medication
#15
Mohammad A Al-Amry, Nada Al-Abdan, Saleh A Al-Othaimeen
We present a 24-year-old female with trauma to her right eye. The patient was prescribed topical Tobramicin-dexamethasone eye drops but the pharmacy dispensed diclofenac diethyl amine ointment. The patient presented to the emergency room with lid edema, conjunctival injection and a corneal epithelial defect and toxic keratitis. The patient was successfully managed with copious irrigation, bandage contact lens and topical antibiotic therapy.
January 2017: Saudi Pharmaceutical Journal: SPJ: the Official Publication of the Saudi Pharmaceutical Society
https://www.readbyqxmd.com/read/28222649/a-randomized-control-trial-to-evaluate-the-effectiveness-of-intravenous-intra-articular-and-topical-wash-regimes-of-tranexamic-acid-in-primary-total-knee-arthroplasty
#16
Jatin Prakash, Jong-Keun Seon, Yong Jin Park, Cheng Jin, Eun-Kyoo Song
BACKGROUND: The efficacy of tranexamic acid to decrease post-operative blood loss and blood transfusion is well established in literature. However, the ideal mode of administration is debatable. Limited literature has compared all the available modes of administration including intravenous (IV), topical irrigation and retrograde through drain. We hypothesized that no difference would be present in either form of administration of tranexamic acid. METHODS: Fifty patients in four groups were enrolled for study...
January 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28222211/the-learning-curve-for-the-direct-anterior-approach-for-total-hip-arthroplasty-a-single-surgeon-s-first-500-cases
#17
James M Hartford, Michael J Bellino
BACKGROUND: Concerns arise over the early complications encountered during the learning curve for the direct anterior approach for total hip arthroplasty. PURPOSE: The purpose of this study is to examine the learning experience of a single surgeon in adapting this approach. METHODS: The 1st 500 primary total hip arthroplasties are reviewed. The patients were evaluated out to 3 months. Rates of major complications, reoperations, periprosthetic fractures, heterotopic ossification, leg length discrepancies and lateral femoral cutaneous nerve deficits were identified for each of 100 patients...
February 17, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/28221978/quantitative-microbial-risk-assessment-for-escherichia-coli-o157-h7-in-fresh-cut-lettuce
#18
Hao Pang, Elisabetta Lambertini, Robert L Buchanan, Donald W Schaffner, Abani K Pradhan
Leafy green vegetables, including lettuce, are recognized as potential vehicles for foodborne pathogens such as Escherichia coli O157:H7. Fresh-cut lettuce is potentially at high risk of causing foodborne illnesses, as it is generally consumed without cooking. Quantitative microbial risk assessments (QMRAs) are gaining more attention as an effective tool to assess and control potential risks associated with foodborne pathogens. This study developed a QMRA model for E. coli O157:H7 in fresh-cut lettuce and evaluated the effects of different potential intervention strategies on the reduction of public health risks...
February 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28221925/genetic-diversity-and-antibiotic-resistance-of-escherichia-coli-isolates-from-different-leafy-green-production-systems
#19
Mosimanegape Jongman, Lise Korsten
Foodborne disease outbreaks linked to contaminated irrigation water and fresh produce are a public health concern. The presence of Escherichia coli isolates from irrigation water and leafy green vegetables in different food production systems (large commercial farms, small-scale farms, and homestead gardens) was investigated. The prevalence of antibiotic resistance and virulence in these isolates was further assessed, and links between water source and irrigated crops were identified using antimicrobial and genotypic analyses...
November 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221847/thermal-and-starvation-stress-response-of-escherichia-coli-o157-h7-isolates-selected-from-agricultural-environments
#20
Achyut Adhikari, Andy Bary, Craig Cogger, Caleb James, Gülhan Ünlü, Karen Killinger
Pathogens exposed to agricultural production environments are subject to multiple stresses that may alter their survival under subsequent stress conditions. The objective of this study was to examine heat and starvation stress response of Escherichia coli O157:H7 strains isolated from agricultural matrices. Seven E. coli O157:H7 isolates from different agricultural matrices-soil, compost, irrigation water, and sheep manure-were selected, and two ATCC strains were used as controls. The E. coli O157:H7 isolates were exposed to heat stress (56°C in 0...
October 2016: Journal of Food Protection
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