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https://www.readbyqxmd.com/read/28933021/sources-composition-and-spectroscopiccharacteristics-of-dissolved-organic-matter-extractedfrom-sediments-in-an-anthropogenic-impacted-riverin-southeastern-china
#1
Tongbin Zhu, Pengfei Duan, Jianguo He, Miaomiao Zhao, Ming Li
The fluorescence and ultraviolet spectroscopic characteristics of dissolved organic matter extracted from sediments in an anthropogenic-impacted river (Hao River) in Southeastern China were analyzed in the current study. Excitation-emission matrix (EEM) fluorescence combined with parallel factor analysis (PARAFAC) was conducted to analyze the sources and composition of dissolved organic matter (DOM). The average dissolved organic carbon (DOC) concentrations of all samples at depths of 0-10, 10-20, and 20-30 cm were 317, 319, and 319 mg kg(-1) dry weight, respectively...
September 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28928693/the-dimensional-obsessive-compulsive-scale-development-and-validation-of-a-short-form-docs-sf
#2
Thomas Eilertsen, Bjarne Hansen, Gerd Kvale, Jonathan S Abramowitz, Silje E H Holm, Stian Solem
Accurately and reliably measuring the presence and severity of Obsessive-Compulsive Disorder (OCD) symptoms is essential for both routine clinical work and research. The current study investigated psychometric properties of the dimensional obsessive-compulsive scale-short form (DOCS-SF). DOCS-SF was developed and validated in Norwegian. DOCS-SF contains a checklist with four symptom categories and five severity items scored on a zero to eight scale yielding a total score of 0-40. Data were collected from adults with a current diagnosis of OCD (n = 204) and a community comparison group (n = 211)...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28926062/selectivity-of-solid-phase-extraction-for-dissolved-organic-matter-in-the-hypersaline%C3%A2-da-qaidam-lake-china
#3
Keli Yang, Yaoling Zhang, Yaping Dong, Wu Li
Dissolved organic matter (DOM) was isolated from the hypersaline Da Qaidam Lake using solid-phase extraction (SPE) methods with five different adsorbents: ENVI-Carb (non-porous graphitized carbon), HLB, PPL, and XAD-8 (polymer based), and ENVI-18 (silica based). Structure-selective assessments of SPE-DOM isolated using the different adsorbents were conducted using a combination of complementary analysis techniques, including dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) analysis, as well as elemental analysis, Fourier transformed infrared spectroscopy (FTIR), (1)H nuclear magnetic resonance ((1)H NMR) and pyrolysis-gas chromatography-mass spectrometry (Py-GC/MS)...
September 19, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/28918680/transcranial-direct-current-stimulation-in-disorders-of-consciousness-a-review
#4
Ye Zhang, Weiqun Song
It is a challenge to evaluate and treat the patients with disorders of consciousness (DOC) in the clinic. Due to the huge costs of prolonged intensive care, the management of these patients raises great financial strain on families and important ethical questions. To date, several studies have attempted to specifically detect pharmacologic or non-pharmacologic effectiveness, until now there were no evidence-based guidelines about the treatment of patients with DOC. Recently, because of ethical and procedural limitations on the use of invasive stimulation techniques, non-invasive brain stimulation, such as the transcranial direct current stimulation (tDCS), has been investigated for improving the level of consciousness in patients with DOC...
September 18, 2017: International Journal of Neuroscience
https://www.readbyqxmd.com/read/28916282/chlorate-origin-and-fate-in-shallow-groundwater-below-agricultural-landscapes
#5
Micòl Mastrocicco, Dario Di Giuseppe, Fabio Vincenzi, Nicolò Colombani, Giuseppe Castaldelli
In agricultural lowland landscapes, intensive agricultural is accompanied by a wide use of agrochemical application, like pesticides and fertilizers. The latter often causes serious environmental threats such as N compounds leaching and surface water eutrophication; additionally, since perchlorate can be present as impurities in many fertilizers, the potential presence of perchlorates and their by-products like chlorates and chlorites in shallow groundwater could be a reason of concern. In this light, the present manuscript reports the first temporal and spatial variation of chlorates, chlorites and major anions concentrations in the shallow unconfined aquifer belonging to Ferrara province (in the Po River plain)...
September 12, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28915460/persistent-and-widespread-long-term-phosphorus-declines-in-boreal-lakes-in-sweden
#6
Brian J Huser, Martyn N Futter, Rong Wang, Jens Fölster
We present an analysis of long-term (1988-2103; 26years) total phosphorus (TP) concentration trends in 81 Swedish boreal lakes subject to minimal anthropogenic disturbance. Near universal increases in dissolved organic carbon (DOC) concentrations and a widespread but hitherto unexplained decline in TP were observed. Over 50% of the lakes (n=42) had significant declining TP trends over the past quarter century (Sen's slope=2.5%y(-1)). These declines were linked to catchment processes related to changes in climate, recovery from acidification, and catchment soil properties, but were unrelated to trends in P deposition...
September 12, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28914530/the-emergence-of-the-reactivity-continuum-of-organic-matter-from-kinetics-of-a-multitude-of-individual-molecular-constituents
#7
Alina Mostovaya, Jeffrey Alistair Hawkes, Birgit Koehler, Thorsten Dittmar, Lars J Tranvik
The reactivity continuum (RC) model is a powerful statistical approach for describing the apparent kinetics of bulk organic matter (OM) decomposition. Here, we used ultrahigh resolution mass spectrometry data to evaluate the main premise of the RC model, namely that there is a continuous spectrum of reactivity within bulk OM, where each individual reactive type undergoes exponential decay. We performed a 120 days OM decomposition experiment on lake water, with an untreated control and a treatment preexposed to UV light, and described the loss of bulk dissolved organic carbon (DOC) with RC modeling...
September 15, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28913494/the-public-perception-of-the-anaesthesiologist-in-romania-a-survey
#8
Adela Hilda Onutu, Cristina Rus, Iurie Acalovschi
BACKGROUND: Previous studies have shown that the public perception of anaesthesiologists' duties regarding perioperative management lacks a good understanding. The aim of this study was to assess the public perception of the anaesthesiologist's role before, during and after surgery, in Romania. METHOD: The prospective cross-sectional study was undertaken between January 2015 and August 2016. A questionnaire that comprised 23 questions was uploaded on Google at https://docs...
April 2017: Rom J Anaesth Intensive Care
https://www.readbyqxmd.com/read/28911177/deoxycorticosterone-salt-mediated-cardiac-inflammation-and-fibrosis-are-dependent-on-functional-clock-signaling-in-male-mice
#9
Elizabeth K Fletcher, James Morgan, David R Kennaway, Laura A Bienvenu, Amanda J Rickard, Lea M D Delbridge, Peter J Fuller, Colin D Clyne, Morag J Young
Activation of the mineralocorticoid receptor (MR) promotes inflammation, fibrosis, and hypertension. Clinical and experimental studies show that MR antagonists have significant therapeutic benefit for all-cause heart failure; however, blockade of renal MRs limits their widespread use. Identification of key downstream signaling mechanisms for the MR in the cardiovascular system may enable development of targeted MR antagonists with selectivity for pathological MR signaling and lower impact on physiological renal electrolyte handling...
September 1, 2017: Endocrinology
https://www.readbyqxmd.com/read/28903553/monitoring-microbial-mineralization-using-reverse-stable-isotope-labelling-analysis-by-mid-infrared-laser-spectroscopy
#10
Xiyang Dong, Maik A Jochmann, Martin Elsner, Armin H Meyer, Leonard E Bäcker, Mona Rahmatullah, Daniel Schunk, Guido Lens, Rainer Udo Meckenstock
Assessing the biodegradation of organic compounds is a frequent question in environmental science. Here, we present a sensitive, inexpensive, and simple approach to monitor microbial mineralization using reverse stable isotope labelling analysis (RIL) of dissolved inorganic carbon (DIC). The medium for the biodegradation assay contains regular organic compounds and (13)C-labelled DIC with (13)C atom fractions (x((13)C)DIC) higher than natural abundance (typically 2-50%). The produced CO2 (x((13)C) ≈ 1.11%) gradually dilutes the initial x((13)C)DIC allowing to quantify microbial mineralization using mass-balance calculations...
September 14, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28903173/climatic-and-watershed-controls-of-dissolved-organic-matter-variation-in-streams-across-a-gradient-of-agricultural-land-use
#11
Peng Shang, YueHan Lu, YingXun Du, Rudolf Jaffé, Robert H Findlay, Anne Wynn
Human land use has led to significant changes in the character of dissolved organic matter (DOM) in lotic ecosystems. These changes are expected to have important environmental and ecological consequences. However, high spatiotemporal variability has been reported in previous studies, and the underlying mechanisms remain inadequately understood. This study assessed variation in the properties of stream water DOM within watersheds across a gradient of agricultural land use with grazing pasture lands as the dominant agricultural type in the southeastern United States...
September 9, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28903078/derivation-of-reliable-empirical-models-describing-lead-transfer-from-metal-polluted-soils-to-radish-raphanus-sativa-l-determining-factors-and-soil-criteria
#12
Sha Zhang, Jing Song, Yinwen Cheng, Peter Christie, Jian Long, Lingfei Liu
Reliable models describing Pb transfer from soils to food crops are useful in the improvement of soil protection guidelines. This study provides mechanistic insights from in-situ soil solution measurement on the Pb uptake in the root tissues (RF) of radish, grown in 25 representative Pb-contaminated agricultural soils. Lead speciation and regression analysis indicate that >88.6% of the variation in RF Pb is attributable to free Pb(2+) activity (aPb(2+)) in the soil solution, which is predominantly controlled by pH and DOC...
September 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28902713/long-lasting-repetitive-transcranial-magnetic-stimulation-modulates-electroencephalography-oscillation-in-patients-with-disorders-of-consciousness
#13
Xiaoyu Xia, Yang Liu, Yang Bai, Ziyuan Liu, Yi Yang, Yongkun Guo, Ruxiang Xu, Xiaorong Gao, Xiaoli Li, Jianghong He
Repetitive transcranial magnetic stimulation (rTMS) has been applied for the treatment of patients with disorders of consciousness (DOC). Timely and accurate assessments of its modulation effects are very useful. This study evaluated rTMS modulation effects on electroencephalography (EEG) oscillation in patients with chronic DOC. Eighteen patients with a diagnosis of DOC lasting more than 3 months were recruited. All patients received one session of 10-Hz rTMS at the left dorsolateral prefrontal cortex and then 12 of them received consecutive rTMS treatment everyday for 20 consecutive days...
September 11, 2017: Neuroreport
https://www.readbyqxmd.com/read/28901493/high-pemetrexed-sensitivity-of-docetaxel-resistant-a549-cells-is-mediated-by-tp53-status-and-downregulated-thymidylate-synthase
#14
Wei-Ting Kuo, Dom-Gene Tu, Ling-Yen Chiu, Gwo-Tarng Sheu, Ming-Fang Wu
The chemoresistance of non-small cell lung cancer (NSCLC) that occurs in docetaxel (DOC) chemotherapy substantially decreases the survival of patients. To overcome DOC-induced chemoresistance, we established DOC-selected A549 lung cancer sublines (A549/D16 and A549/D32) and revealed that both sublines were cross-resistant to vincristine (VCR) and doxorubicin (DXR). Notably, both sublines were more sensitive to pemetrexed (PEM) than parental cells according to MTT and clonogenic assays. The expression levels of thymidylate synthase (TS) and γ-glutamyl hydrolase (GGH) were downregulated in DOC-resistant sublines...
September 7, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28898940/levels-and-spatial-distributions-of-levoglucosan-and-dissolved-organic-carbon-in-snowpits-over-the-tibetan-plateau-glaciers
#15
Quanlian Li, Ninglian Wang, Carlo Barbante, Shichang Kang, Ping Yao, Xin Wan, Elena Barbaro, Maria Del Carmen Villoslada Hidalgo, Andrea Gambaro, Chaoliu Li, Hewen Niu, Zhiwen Dong, Xiaobo Wu
In this study, we collected 60 snowpit samples in nine glaciers from the northern to the southern Tibetan Plateau (TP), to study the levels and spatial distributions of levoglucosan and dissolved organic carbon (DOC). The lowest concentration of levoglucosan was found in the Yuzhufeng (YZF) glacier with a mean value of 0.24±0.08ngmL(-1), while the highest concentration of levoglucosan was detected in the Gurenhekou (GRHK) glacier with a mean value of 11.72±15.61ngmL(-1). However, the average DOC concentration in TP glaciers were comparable, without significant regional differences...
September 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28895945/excess-labile-carbon-promotes-the-expression-of-virulence-factors-in-coral-reef-bacterioplankton
#16
Anny Cárdenas, Matthew J Neave, Mohamed Fauzi Haroon, Claudia Pogoreutz, Nils Rädecker, Christian Wild, Astrid Gärdes, Christian R Voolstra
Coastal pollution and algal cover are increasing on many coral reefs, resulting in higher dissolved organic carbon (DOC) concentrations. High DOC concentrations strongly affect microbial activity in reef waters and select for copiotrophic, often potentially virulent microbial populations. High DOC concentrations on coral reefs are also hypothesized to be a determinant for switching microbial lifestyles from commensal to pathogenic, thereby contributing to coral reef degradation, but evidence is missing. In this study, we conducted ex situ incubations to assess gene expression of planktonic microbial populations under elevated concentrations of naturally abundant monosaccharides (glucose, galactose, mannose, and xylose) in algal exudates and sewage inflows...
September 12, 2017: ISME Journal
https://www.readbyqxmd.com/read/28881244/disinfection-byproduct-precursor-dynamics-and-water-treatability-during-an-extreme-flooding-event-in-a-coastal-blackwater-river-in-southeastern-united-states
#17
A Ruecker, H Uzun, T Karanfil, M T K Tsui, A T Chow
Coastal blackwater rivers, characterized by high concentrations of natural organic matter, are source water for millions of people in the southeastern US. In October 2015, large areas of coastal South Carolina were flooded by Hurricane Joaquin. This so-called "thousand-year" rainfall mobilized and flushed large amounts of terrestrial organic matter and associated pollutants (e.g. mercury) into source water, affecting water quality and safety of municipal water supply. To understand the dynamics of water quality and water treatability during this extreme flood, water samples were collected from Waccamaw River (a typical blackwater river in the southeastern US) during rising limb, peak discharge, falling limb, and base flow...
August 23, 2017: Chemosphere
https://www.readbyqxmd.com/read/28877399/cops-and-docs-the-challenges-for-ed-physicians-balancing-the-police-state-laws-and-emtala
#18
By Kristin E Malcolm, James G Malcolm, Daniel T Wu, Kevin A Spainhour, Kevin P Race
State laws are awash with discord concerning whether a police officer's request or court order necessarily obligates physicians to perform a body fluid analysis of an arrested, conscious, nonconsenting suspect. Police typically bring arrestees directly to the emergency department (ED), and federal courts have begun to wrestle with the implications of the Emergency Medical Treatment and Labor Act (EMTALA), which requires that anyone presenting to the ED be screened for treatment. Some state laws require health care providers to comply with any police request for lab analysis, while other states offer more leeway to physicians...
September 6, 2017: Journal of Healthcare Risk Management: the Journal of the American Society for Healthcare Risk Management
https://www.readbyqxmd.com/read/28870587/the-value-of-midbrain-morphology-in-predicting-prognosis-in-chronic-disorders-of-consciousness-a-preliminary-ultrasound-study
#19
Antonino Chillura, Antonino Naro, Katia Micchia, Alessia Bramanti, Placido Bramanti, Rocco Salvatore Calabrò
Transcranial sonography (TCS) of the brainstem is currently used to support the clinical diagnosis of movement disorders. The aim of the study was to assess the usefulness of midbrain TCS in assessing outcome in patients with Chronic Disorders of Consciousness (DOC). Eleven patients with Minimally Conscious State (MCS) and Unresponsive Wakefulness Syndrome (UWS) were included in the study. We measured the area and echogenicity of the midbrain by encoding and digitally analyzing the corresponding images from the orbitomeatal plane, the morphology of brain parenchyma from the thalamic and cella media plane, and the intracranial circulation...
September 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28867623/colonization-resistance-to-bile-and-virulence-properties-of-escherichia-coli-strains-unusual-characteristics-associated-with-biliary-tract-diseases
#20
Maryam Razaghi, Elahe Tajeddin, Leila Ganji, Masoud Alebouyeh, Amir Houshang Mohammad Alizadeh, Amir Sadeghi, Mohammad Reza Zali
Escherichia coli is the species that is most frequently isolated from bile of patients with biliary tract diseases. This study was aimed to investigate any association between resistance and virulence properties of these isolates with occurrence of the diseases. A total of 102 bile samples were obtained from patients subjected to endoscopic retrograde cholangiopancreatography for different biliary diseases. Clinical data were collected and culture of the bile samples was done on selective media. Resistance of characterized Escherichia coli isolates to deoxycholate sodium (0-7%) and nineteen antibiotics was determined and PCR using 16 pairs of primers targeting stx1, stx2, exhA, eae, bfp, agg, pcvd432, lt, st, ipaH, pic, pet, ast, set, sen, and cdtB genes was done...
September 1, 2017: Microbial Pathogenesis
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