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https://www.readbyqxmd.com/read/28650713/occupational-chemical-exposures-a-collaboration-between-the-georgia-poison-center-and-the-occupational-safety-and-health-administration
#1
Aaron W Tustin, Alison Jones, Gaylord P Lopez, Glenn R Ketcham, Michael J Hodgson
CONTEXT: In the United States, regional poison centers frequently receive calls about toxic workplace exposures. Most poison centers do not share call details routinely with governmental regulatory agencies. Worker health and safety could be enhanced if regulators such as the Occupational Safety and Health Administration (OSHA) had the ability to investigate these events and prevent similar incidents. With this goal in mind, the Georgia Poison Center (GPC) began referring occupational exposures to OSHA in July 2014...
June 26, 2017: Clinical Toxicology
https://www.readbyqxmd.com/read/28649705/naoh-hcl-neutralized-urine-preparation-for-direct-testing-of-uropathogens-by-bruker-ms
#2
Ji Seon Choi, Jayoung Kim, Han-Soo Kim, Chang-Wan Kwon, Min-Sung Kim, Seong-Hyeok Choi
BACKGROUND: We evaluated the analytical performance of a NaOH-HCl neutralization protocol for identifying uropathogens directly from urine samples by a Bruker MS system (Bruker Daltonics, German) and sought to establish a protocol for integrating the method with conventional screening. METHODS: Among all urine samples requested for Gram staining, UF-1000i, and urine cultures by physicians, we selected samples that were positive by both Gram staining and UF-1000i testing...
June 26, 2017: Journal of Clinical Laboratory Analysis
https://www.readbyqxmd.com/read/28646300/methodology-for-non-target-screening-of-sewage-sludge-using-comprehensive-two-dimensional-gas-chromatography-coupled-to-high-resolution-mass-spectrometry
#3
Cathrin Veenaas, Peter Haglund
To investigate the wide range of pollutants occurring in sewage sludge, an analytical method for comprehensive non-target screening is needed. To the best of our knowledge, no procedures currently exist for the full screening of organic contaminants in sewage sludge, which is the ultimate goal of this project. We developed non-discriminating sample preparation methods for gas chromatography-mass spectrometry (GC-MS) analysis. Pressurized liquid extraction (PLE) was used for extraction, with in-line (silica gel selective PLE, SPLE) or off-line clean-up (gel permeation chromatography, GPC)...
June 23, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28626765/serum-metabolomics-profiling-to-identify-biomarkers-for-unstable-angina
#4
Wei Yao, Yuxia Gao, Zheng Wan
Although statistical evidence is clear regarding the dangerousness of unstable angina (UA), a form of coronary heart disease (CHD) characterised by high mortality and morbidity globally, it is important to recognise that diagnostic precision for the condition is unfavourable. In the present research, to gain insight into candidate biomarkers, the author draws on (1)H NMR-based serum metabolic profiling to analyze the unstable angina pectoris (UAP) metabolic signatures; this constitutes an effective way to produce medical diagnosis...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28621761/production-of-chitin-from-penaeus-vannamei-by-products-to-pilot-plant-scale-using-a-combination-of-enzymatic-and-chemical-processes-and-subsequent-optimization-of-the-chemical-production-of-chitosan-by-response-surface-methodology
#5
José A Vázquez, Patrícia Ramos, Jesús Mirón, Jesus Valcarcel, Carmen G Sotelo, Ricardo I Pérez-Martín
The waste generated from shrimp processing contains valuable materials such as protein, carotenoids, and chitin. The present study describes a process at pilot plant scale to recover chitin from the cephalothorax of Penaeus vannamei using mild conditions. The application of a sequential enzymatic-acid-alkaline treatment yields 30% chitin of comparable purity to commercial sources. Effluents from the process are rich in protein and astaxanthin, and represent inputs for further by-product recovery. As a last step, chitin is deacetylated to produce chitosan; the optimal conditions are established by applying a response surface methodology (RSM)...
June 16, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28608764/radioanatomic-study-of-the-greater-palatine-canal-relevant-to-endoscopic-endonasal-surgical-landmarks
#6
Noel Ayoub, Andrew Thamboo, Peter H Hwang, Evan S Walgama
Objective A radioanatomic study of surgically relevant variations in the greater palatine canal (GPC) on computed tomography (CT) was performed to determine susceptibility during endoscopic endonasal procedures. Study Design Blinded radioanatomic analysis. Setting Tertiary university hospital. Subjects and Methods Fifty consecutive paranasal CT scans (100 sides) were analyzed. Measurements were standardized to landmarks such as the inferior turbinate (IT) and floor of the nasal cavity (FNC) to assess variability and vulnerability of the nerve...
June 1, 2017: Otolaryngology—Head and Neck Surgery
https://www.readbyqxmd.com/read/28606547/self-assembled-supermolecular-hydrogel-based-on-hydroxyethyl-cellulose-formation-in-vitro-release-and-bacteriostasis-application
#7
Nan Sun, Ting Wang, Xiufeng Yan
Self-assembly of cellulose-based hydrogel is a new supermolecular architecture with potential for biomedical applications. In this study, a novel cellulose-based, supermolecular self-assembled hydrogel (gel-(β)CDP-HEC) was studied, which was based on the host-guest interaction between hydrophobic lauryl side chains grafting on hydroxyethyl cellulose (HECC12) and the cavities in poly(β-cyclodextrin) (β-CDP). The critical concentrations of HECC12 and β-CDP should be both fixed at 30mgmL(-1) by the results of dynamic viscosity, rheological property and swelling ratio...
September 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28603417/glucose-and-temperature-sensitive-nanoparticles-for-insulin-delivery
#8
Jun-Zi Wu, Gareth R Williams, He-Yu Li, Dongxiu Wang, Huanling Wu, Shu-De Li, Li-Min Zhu
Glucose- and temperature-sensitive polymers of a phenylboronic acid derivative and diethylene glycol dimethacrylate (poly(3-acrylamidophenyl boronic acid-b-diethylene glycol methyl ether methacrylate); p(AAPBA-b-DEGMA)) were prepared by reversible addition-fragmentation chain transfer polymerization. Successful polymerization was evidenced by (1)H nuclear magnetic resonance and infrared spectroscopy, and the polymers were further explored in terms of their glass transition temperatures and by gel permeation chromatography (GPC)...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28602987/modification-of-oil-palm-fronds-lignin-by-incorporation-of-m-cresol-for-improving-structural-and-antioxidant-properties
#9
Nurul Atiqah Sa'don, Afidah Abdul Rahim, Mohamad Nasir Mohamad Ibrahim, Nicolas Brosse, M Hazwan Hussin
Lignin extracted from oil palm fronds (OPF) underwent chemical modification by incorporating m-cresol into the lignin matrix. This study reports on the physicochemical properties and antioxidant activity of unmodified autohydrolyzed ethanol organosolv lignin (AH EOL) and the modified autohydrolyzed ethanol organosolv lignin (AHC EOL). The lignin samples were analyzed by FTIR, (1)H and (13)C NMR spectroscopy, 2D NMR: HSQC spectroscopy, CHN analysis, molecular weight distribution analysis; GPC and thermal analysis; DSC and TGA...
June 8, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28602885/high-expression-of-glypican-1-predicts-dissemination-and-poor-prognosis-in-glioblastomas
#10
Taiichi Saito, Kazuhiko Sugiyama, Seiji Hama, Fumiyuki Yamasaki, Takeshi Takayasu, Ryo Nosaka, Shumpei Onishi, Yoshihiro Muragaki, Takakazu Kawamata, Kaoru Kurisu
OBJECTIVE: Glioblastoma (GBM) relapses locally or in a disseminated pattern, and is highly resistant to chemo-radiotherapy. Although dissemination is associated with poor prognosis for GBM patients, the clinico-pathological factors that promote dissemination have not been elucidated. Glypican-1 (GPC-1) is a heparin sulfate proteoglycan that is attached to the extracytoplasmic surface of the cell membrane and regulates cell motility. The aim of this study was to determine whether GPC-1 expression correlated with GBM dissemination and patient prognosis...
June 5, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28596983/prospective-randomized-comparison-of-a-22g-core-needle-using-standard-versus-capillary-suction-for-eus-guided-sampling-of-solid-pancreatic-masses
#11
Brian R Weston, William A Ross, Manoop S Bhutani, Jeffrey H Lee, Mala Pande, Andrew B Sholl, Savitri Krishnamurthy
BACKGROUND AND STUDY AIMS:  The optimal technique for sampling pancreatic lesions with a 22 G Procore needle (pc) is unknown. The aims of this study were to evaluate the 22 Gpc using standard suction technique (SST) and capillary suction technique (CST) and compare diagnostic adequacy of 22 Gpc with the standard 25 G needle. PATIENTS AND METHODS:  Sixty consecutive patients referred for EUS-FNA of a solid pancreatic mass were prospectively evaluated...
June 2017: Endoscopy International Open
https://www.readbyqxmd.com/read/28587965/preparation-and-characterization-of-dialdehyde-starch-by-one-step-acid-hydrolysis-and-oxidation
#12
Yingfeng Zuo, Wenjie Liu, Junhua Xiao, Xing Zhao, Ying Zhu, Yiqiang Wu
Dialdehyde starch was prepared by one-step synthesis of acid hydrolysis and oxidation, using corn starch as the raw material, sodium periodate (NaIO4) as the oxidant, and hydrochloric acid (HCl) as the acid solution. The prepared dialdehyde starch was characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and gel permeation chromatography (GPC). The results confirmed that oxidation occurred between the starch and NaIO4. The acid hydrolysis reaction reduced the molecular weight of starch and effectively improved the aldehyde group contents (92...
June 3, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28583636/metabolic-profile-of-liver-damage-in-non-cirrhotic-virus-c-and-autoimmune-hepatitis-a-proton-decoupled-31-p-mrs-study
#13
Antti Hakkarainen, Lauri Puustinen, Reetta Kivisaari, Sonja Boyd, Urpo Nieminen, Perttu Arkkila, Nina Lundbom
PURPOSE: To study liver (31)P MRS, histology, transient elastography, and liver function tests in patients with virus C hepatitis (HCV) or autoimmune hepatitis (AIH) to test the hypothesis that (31)P MR metabolic profile of these diseases differ. MATERIALS AND METHODS: 25 patients with HCV (n=12) or AIH (n=13) underwent proton decoupled (31)P MRS spectroscopy performed on a 3.0T MR imager. Intensities of phosphomonoesters (PME) of phosphoethanolamine (PE) and phosphocholine (PC), phosphodiesters (PDE) of glycerophosphoethanolamine (GPE) and glycerophosphocholine (GPC), and γ, α and β resonances of adenosine triphosphate (ATP), and nicotinamide adenine dinucleotide phosphate (NADPH) were determined...
May 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/28574475/feeding-a-mixture-of-choline-forms-to-lactating-dams-improves-the-development-of-the-immune-system-in-sprague-dawley-rat-offspring
#14
Caroline Richard, Erin D Lewis, Susan Goruk, Emily Wadge, Jonathan M Curtis, René L Jacobs, Catherine J Field
Dietary choline is essential during lactation, but few studies have examined the implications of feeding a mixture of choline forms on immune function. This study investigates the impact of feeding lactating dams different mixtures of choline forms, similar to those in human diets, on the development and later immune function of suckled offspring. Sprague-Dawley lactating dams (n = 6/diet) were randomized to consume one of three diets, containing 1 g/kg choline: Control (100% free choline (FC)), Mixed Choline (MC: 50% phosphatidylcholine (PC), 25% FC, 25% glycerophosphocholine (GPC)), or High GPC (HGPC: 75% GPC, 12...
June 2, 2017: Nutrients
https://www.readbyqxmd.com/read/28572385/structural-basis-for-antibody-mediated-neutralization-of-lassa-virus
#15
Kathryn M Hastie, Michelle A Zandonatti, Lara M Kleinfelter, Megan L Heinrich, Megan M Rowland, Kartik Chandran, Luis M Branco, James E Robinson, Robert F Garry, Erica Ollmann Saphire
The arenavirus Lassa causes severe hemorrhagic fever and a significant disease burden in West Africa every year. The glycoprotein, GPC, is the sole antigen expressed on the viral surface and the critical target for antibody-mediated neutralization. Here we present the crystal structure of the trimeric, prefusion ectodomain of Lassa GP bound to a neutralizing antibody from a human survivor at 3.2-angstrom resolution. The antibody extensively anchors two monomers together at the base of the trimer, and biochemical analysis suggests that it neutralizes by inhibiting conformational changes required for entry...
June 2, 2017: Science
https://www.readbyqxmd.com/read/28560151/auditory-prediction-errors-as-individual-biomarkers-of-schizophrenia
#16
J A Taylor, N Matthews, P T Michie, M J Rosa, M I Garrido
Schizophrenia is a complex psychiatric disorder, typically diagnosed through symptomatic evidence collected through patient interview. We aim to develop an objective biologically-based computational tool which aids diagnosis and relies on accessible imaging technologies such as electroencephalography (EEG). To achieve this, we used machine learning techniques and a combination of paradigms designed to elicit prediction errors or Mismatch Negativity (MMN) responses. MMN, an EEG component elicited by unpredictable changes in sequences of auditory stimuli, has previously been shown to be reduced in people with schizophrenia and this is arguably one of the most reproducible neurophysiological markers of schizophrenia...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28559458/towards-an-optimal-composition-of-general-practitioners-and-nurse-practitioners-in-out-of-hours-primary-care-teams-a-quasi-experimental-study
#17
Mieke van der Biezen, Michel Wensing, Regi van der Burgt, Miranda Laurant
OBJECTIVES: To gain insights into the ability of general practitioners (GPs) and nurse practitioners (NPs) to meet patient demands in out-of-hours primary care by comparing the outcomes of teams with different ratios of practitioners. DESIGN: Quasi-experimental study. SETTING: A GP cooperative (GPC) in the Netherlands. INTERVENTION: Team 2 (1 NP, 3 GPs) and team 3 (2 NPs, 2 GPs) were compared with team 1 (4 GPs). Each team covered 35 weekend days...
May 30, 2017: BMJ Open
https://www.readbyqxmd.com/read/28555026/structural-characterization-of-lignin-in-fruits-and-stalks-of-chinese-quince
#18
Hui-Shuang Yin, Hua-Min Liu, Yu-Lan Liu
Chinese quince (Chaenomeles sinensis) is used in food and pharmaceutical products, but it is seldom eaten as a raw fruit due to its astringent, woody flesh. The structural characterization of lignin fractions from Chinese quince was very important to investigate the structure-activity relationships of lignin. In this investigation, to characterize the structure of lignin in Chinese quince fruits, the milled wood lignin sample was isolated from the fruits (FMWL) and the chemical structure of FMWL was investigated by sugar analysis, FT-IR, GPC, pyrolysis-GC/MS analysis, UV spectra analysis, thermogravimetric analysis (TGA), and advanced NMR spectroscopic techniques...
May 27, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28552934/corrosion-resistance-of-plga-coated-biomaterials
#19
Janusz Szewczenko, Wojciech Kajzer, Magdalena Grygiel-Pradelok, Joanna Jaworska, Katarzyna Jelonek, Katarzyna Nowińska, Maria Gawliczek, Marcin Libera, Andrzej Marcinkowski, Janusz Kasperczyk
The aim of the study was to determine the influence of PLGA bioresorbable polymer coating on corrosion resistance of metal biomaterial. Polymer coating deposited by immersion method was applied. Corrosion resistance of metal biomaterials (stainless steel, Ti6Al4V, Ti6Al7Nb) coated with PLGA polymer, after 90 days exposure to Ringer's solution was tested. The amount of metal ions released to the solution was also investigated (inductively coupled plasma-atomic emission spectrometry (ICP-AES) method). The surface of the samples was observed using atomic force microscopy (AFM) and scanning electron microscopy (SEM)...
2017: Acta of Bioengineering and Biomechanics
https://www.readbyqxmd.com/read/28551241/structure-characterization-and-antioxidant-activity-of-polysaccharides-from-chinese-quince-seed-meal
#20
Li Wang, Hua-Min Liu, Guang-Yong Qin
In the present study, three polysaccharide fractions, QSMP-1, QSMP-2, and QSMP-3, were isolated and purified from the seed meal of Chinese quince. These fractions' structures were investigated by high performance anion exchange chromatography (HPAEC), gel permeation chromatography (GPC), Fourier transform infrared (FT-IR), and nuclear magnetic resonance (NMR), and their antioxidant activities were assessed. The results showed that QSMP-1 is a novel polysaccharide with a backbone mainly composed of →4)-Glcp-(1→, →6)-Glcp-(1→, →6)-Galp-(1→, →2, 3, 4)-Xylp-(1→...
November 1, 2017: Food Chemistry
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