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https://www.readbyqxmd.com/read/28431357/soil-organic-carbon-and-nitrogen-pools-drive-soil-c-co2-emissions-from-selected-soils-in-maritime-antarctica
#1
C V Pires, C E R G Schaefer, A K Hashigushi, A Thomazini, E I F Filho, E S Mendonça
The ongoing trend of increasing air temperatures will potentially affect soil organic matter (SOM) turnover and soil C-CO2 emissions in terrestrial ecosystems of Maritime Antarctica. The effects of SOM quality on this process remain little explored. We evaluated (i) the quantity and quality of soil organic matter and (ii) the potential of C release through CO2 emissions in lab conditions in different soil types from Maritime Antarctica. Soil samples (0-10 and 10-20cm) were collected in Keller Peninsula and the vicinity of Arctowski station, to determine the quantity and quality of organic matter and the potential to emit CO2 under different temperature scenarios (2, 5, 8 and 11°C) in lab...
April 18, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28430189/warming-enhances-old-organic-carbon-decomposition-through-altering-functional-microbial-communities
#2
Lei Cheng, Naifang Zhang, Mengting Yuan, Jing Xiao, Yujia Qin, Ye Deng, Qichao Tu, Kai Xue, Joy D Van Nostrand, Liyou Wu, Zhili He, Xuhui Zhou, Mary Beth Leigh, Konstantinos T Konstantinidis, Edward Ag Schuur, Yiqi Luo, James M Tiedje, Jizhong Zhou
Soil organic matter (SOM) stocks contain nearly three times as much carbon (C) as the atmosphere and changes in soil C stocks may have a major impact on future atmospheric carbon dioxide concentrations and climate. Over the past two decades, much research has been devoted to examining the influence of warming on SOM decomposition in topsoil. Most SOM, however, is old and stored in subsoil. The fate of subsoil SOM under future warming remains highly uncertain. Here, by combining a long-term field warming experiment and a meta-analysis study, we showed that warming significantly increased SOM decomposition in subsoil...
April 21, 2017: ISME Journal
https://www.readbyqxmd.com/read/28419163/response-of-microbial-community-of-organic-matter-impoverished-arable-soil-to-long-term-application-of-soil-conditioner-derived-from-dynamic-rapid-fermentation-of-food-waste
#3
Jiaqi Hou, Mingxiao Li, Xuhui Mao, Yan Hao, Jie Ding, Dongming Liu, Beidou Xi, Hongliang Liu
Rapid fermentation of food waste can be used to prepare soil conditioner. This process consumes less time and is more cost-effective than traditional preparation technology. However, the succession of the soil microbial community structure after long-term application of rapid fermentation-derived soil conditioners remains unclear. Herein, dynamic rapid fermentation (DRF) of food waste was performed to develop a soil conditioner and the successions and diversity of bacterial communities in an organic-matter-impoverished arable soil after six years of application of DRF-derived soil conditioner were investigated...
2017: PloS One
https://www.readbyqxmd.com/read/28407926/preconcentration-and-trace-determination-of-copper-ii-in-thai-food-recipes-using-fe3o4-chi-gqds-nanocomposites-as-a-new-magnetic-adsorbent
#4
Nunticha Limchoowong, Phitchan Sricharoen, Yonrapach Areerob, Prawit Nuengmatcha, Thitiya Sripakdee, Suchila Techawongstien, Saksit Chanthai
This study describes the preparation, characterization, and application of a new magnetic chitosan-graphene quantum dots (Fe3O4@Chi-GQDs) nanocomposite as an adsorbent for the preconcentration of Cu(II) in Thai food recipes or the so-called "Som Tam" (green papaya salad) prior to determination by inductively coupled plasma-optical emission spectrometry. The spectroscopic and magnetic properties along with the morphology and thermal property were analyzed using FTIR, EDX, XRD, TGA, VSM, and TEM. Preconcentration optimizations including pH, dosage of adsorbent, adsorption-desorption time, concentration and volume of elution solvent, sample volume and enrichment factor, and reusing time were investigated...
September 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28405785/determination-of-the-potential-implementation-impact-of-2016-ministry-of-environmental-protection-generic-assessment-criteria-for-potentially-contaminated-sites-in-china
#5
Yuanyuan Cheng, Yu-Ting Tang, C Paul Nathanail
The Ministry of Environmental Protection of China issued a 3rd draft edition of risk-based Generic Assessment Criteria (the MEP-GAC) in March 2016. Since these will be the first authoritative GAC in China, their implementation is likely to have a significant impact on China's growing contaminated land management sector. This study aims to determine the potential implementation impact of the MEP-GAC through an in-depth analysis of the management context, land use scenarios, health criteria values adopted and exposure pathways considered...
April 12, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28382124/frequency-of-serous-otitis-media-in-children-without-otolaryngological-symptoms
#6
Murat Kocyigit, Safiye Giran Ortekin, Taliye Cakabay, Guven Ozkaya, Selin Ustun Bezgin, Mustafa Kemal Adali
Introduction Otitis media with effusion is the fluid in the middle ear with no signs or symptoms of acute ear infection. Objective This study aims to research the frequency of serous otitis media in patients referred to the pediatric clinic between 3-16 years of age without any active ear, nose, and throat complaints. Methods This study included 589 children patients (280 boys, 309 girls; mean age: 9.42; range 3-16) who were administered to the pediatric clinic without otolaryngologic complaints. Patients underwent examination with flexible nasopharyngoscopy for adenoid hypertrophy...
April 2017: International Archives of Otorhinolaryngology
https://www.readbyqxmd.com/read/28374004/intrinsic-circuits-in-the-lateral-central-amygdala
#7
Sarah Hunt, Yajie Sun, Hakan Kucukdereli, Rüdiger Klein, Pankaj Sah
Network activity in the lateral central amygdala (CeL) plays a crucial role in fear learning and emotional processing. However, the local circuits of the CeL are not fully understood and have only recently begun to be explored in detail. Here, we characterized the intrinsic circuits in the CeL using paired whole-call patch-clamp recordings, immunohistochemistry, and optogenetics in C57BL/6J wild-type and somatostatin-cre (SOM-Cre) mice. Our results revealed that throughout the rostrocaudal extent of the CeL, neurons form inhibitory connections at a rate of ∼29% with an average amplitude of 20 ± 3 pA (at -40 mV)...
January 2017: ENeuro
https://www.readbyqxmd.com/read/28373193/high-level-resistance-of-staphylococcus-aureus-to-%C3%AE-lactam-antibiotics-mediated-by-penicillin-binding-protein-4-pbp4
#8
Stephanie M Hamilton, J Andrew N Alexander, Eun Ju Choo, Li Basuino, Thaina M da Costa, Anatoly Severin, Marilyn Chung, Sandra Aedo, Natalie C J Strynadka, Alexander Tomasz, Som S Chatterjee, Henry F Chambers
PBP4, a non-essential, low molecular weight penicillin-binding protein of Staphylococcus aureus, has been implicated in low-level resistance to β-lactam antibiotics, although the mechanism is unknown. Mutations in PBP4 and its promoter were identified in a laboratory-generated mutant strain CRB, which expresses high-level resistance to β-lactams, including resistance to the new generation cephalosporins active against methicillin-resistant strains of S. aureus These mutations did not appreciably alter β-lactam antibiotic binding affinity of purified recombinant mutant PBP4 compared to wild-type...
April 3, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28369463/childhood-injury-prevention-predictors-of-home-hazards-in-latino-families-enrolled-in-safecare%C3%A2
#9
Alexandra Slemaker, Hannah C Espeleta, Zohal Heidari, Som B Bohora, Jane F Silovsky
 This archival project (a) examined potential risk and protective factors for hazards in the homes of Spanish-speaking immigrant Latino families and (b) provided an independent examination of the SafeCare®+ Home Safety module adapted for Latino families at high risk for child neglect.  The sample comprised 92 Latina caregivers of young children enrolled in SafeCare®+.  Results of the negative binomial regression model of predictors of home hazards before the Home Safety module found none of the factors were significant...
March 21, 2017: Journal of Pediatric Psychology
https://www.readbyqxmd.com/read/28368833/autonomous-data-collection-using-a-self-organizing-map
#10
Jan Faigl, Geoffrey A Hollinger
The self-organizing map (SOM) is an unsupervised learning technique providing a transformation of a high-dimensional input space into a lower dimensional output space. In this paper, we utilize the SOM for the traveling salesman problem (TSP) to develop a solution to autonomous data collection. Autonomous data collection requires gathering data from predeployed sensors by moving within a limited communication radius. We propose a new growing SOM that adapts the number of neurons during learning, which also allows our approach to apply in cases where some sensors can be ignored due to a lower priority...
March 28, 2017: IEEE Transactions on Neural Networks and Learning Systems
https://www.readbyqxmd.com/read/28368012/illuminating-dynamic-neutrophil-trans-epithelial-migration-with-micro-optical-coherence-tomography
#11
Kengyeh K Chu, Mark E Kusek, Linbo Liu, Avira Som, Lael M Yonker, Huimin Leung, Dongyao Cui, Jinhyeob Ryu, Alexander D Eaton, Guillermo J Tearney, Bryan P Hurley
A model of neutrophil migration across epithelia is desirable to interrogate the underlying mechanisms of neutrophilic breach of mucosal barriers. A co-culture system consisting of a polarized mucosal epithelium and human neutrophils can provide a versatile model of trans-epithelial migration in vitro, but observations are typically limited to quantification of migrated neutrophils by myeloperoxidase correlation, a destructive assay that precludes direct longitudinal study. Our laboratory has recently developed a new isotropic 1-μm resolution optical imaging technique termed micro-optical coherence tomography (μOCT) that enables 4D (x,y,z,t) visualization of neutrophils in the co-culture environment...
April 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28367375/the-hospital-score-and-lace-index-as-predictors-of-30-day-readmission-in-a-retrospective-study-at-a-university-affiliated-community-hospital
#12
Robert Robinson, Tamer Hudali
INTRODUCTION: Hospital readmissions are common, expensive, and a key target of the Medicare Value Based Purchasing (VBP) program. Validated risk assessment tools such as the HOSPITAL score and LACE index have been developed to identify patients at high risk of hospital readmission so they can be targeted for interventions aimed at reducing the rate of readmission. This study aims to evaluate the utility of HOSPITAL score and LACE index for predicting hospital readmission within 30 days in a moderate-sized university affiliated hospital in the midwestern United States...
2017: PeerJ
https://www.readbyqxmd.com/read/28361999/synthesis-of-sr2si5n8-ce-3-phosphors-for-white-leds-via-an-efficient-chemical-deposition
#13
Che-Yuan Yang, Sudipta Som, Subrata Das, Chung-Hsin Lu
Novel chemical vapor deposition (CVD) process was successfully developed for the growth of Sr2Si5N8:Ce(3+) phosphors with elevated luminescent properties. Metallic strontium was used as a vapor source for producing Sr3N2 vapor to react with Si3N4 powder via a homogeneous gas-solid reaction. The phosphors prepared via the CVD process showed high crystallinity, homogeneous particle size ranging from 8 to 10 μm, and high luminescence properties. In contrast, the phosphors prepared via the conventional solid-state reaction process exhibited relative low crystallinity, non-uniform particle size in the range of 0...
March 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28361600/application-of-drifts-13-c-nmr-and-py-mbms-to-characterize-the-effects-of-soil-science-oxidation-assays-on-soil-organic-matter-composition-in-a-mollic-xerofluvent
#14
Andrew J Margenot, Francisco J Calderón, Kimberly A Magrini, Robert J Evans
Chemical oxidations are routinely employed in soil science to study soil organic matter (SOM), and their interpretation could be improved by characterizing oxidation effects on SOM composition with spectroscopy. We investigated the effects of routinely employed oxidants on SOM composition in a Mollic Xerofluvent representative of intensively managed agricultural soils in the California Central Valley. Soil samples were subjected to oxidation by potassium permanganate (KMnO4), sodium hypochlorite (NaOCl), and hydrogen peroxide (H2O2)...
January 1, 2017: Applied Spectroscopy
https://www.readbyqxmd.com/read/28359522/deficiencies-in-global-health-training-for-cardiovascular-fellows
#15
EDITORIAL
Sumit Som
No abstract text is available yet for this article.
April 4, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28358321/the-influence-of-tetrodotoxin-ttx-on-the-distribution-and-chemical-coding-of-caudal-mesenteric-ganglion-camg-neurons-supplying-the-porcine-urinary-bladder
#16
Ewa Lepiarczyk, Agnieszka Bossowska, Jerzy Kaleczyc, Marta Majewska, Sławomir Gonkowski, Mariusz Majewski
The treatment of micturition disorders creates a serious problem for urologists. Recently, new therapeutic agents, such as neurotoxins, are being considered for the therapy of urological patients. The present study investigated the chemical coding of caudal mesenteric ganglion (CaMG) neurons supplying the porcine urinary bladder after intravesical instillation of tetrodotoxin (TTX). The CaMG neurons were visualized with retrograde tracer Fast blue (FB) and their chemical profile was disclosed with double-labeling immunohistochemistry using antibodies against tyrosine hydroxylase (TH), neuropeptide Y (NPY), vasoactive intestinal polypeptide (VIP), somatostatin (SOM), calbindin (CB), galanin (GAL) and neuronal nitric oxide synthase (nNOS)...
March 30, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28352980/symptom-clusters-for-revising-scale-membership-in-the-analysis-of-prostate-cancer-patient-reported-outcome-measures-a-secondary-data-analysis-of-the-medical-research-council-rt01-trial-iscrtn47772397
#17
Agnieszka Lemanska, Tao Chen, David P Dearnaley, Rajesh Jena, Matthew R Sydes, Sara Faithfull
PURPOSE: To investigate the role of symptom clusters in the analysis and utilisation of patient reported outcome measures (PROMs) for data modelling and clinical practice. To compare symptom clusters with scales, and to explore their value in PROMs interpretation and symptom management. METHODS: A dataset called RT01 (ISCRTN47772397) of 843 prostate cancer patients was used. PROMs were reported with the University of California, Los Angeles Prostate Cancer Index (UCLA-PCI)...
March 28, 2017: Quality of Life Research
https://www.readbyqxmd.com/read/28351008/aerosol-characteristics-and-sources-in-yangzhou-china-resolved-by-offline-aerosol-mass-spectrometry-and-other-techniques
#18
Xinlei Ge, Ling Li, Yanfang Chen, Hui Chen, Dan Wu, Junfeng Wang, Xinchun Xie, Shun Ge, Zhaolian Ye, Jianzhong Xu, Mindong Chen
Detailed chemical characterization of fine aerosols (PM2.5) is important for reducing air pollution in densely populated areas, such as the Yangtze River Delta region in China. This study systematically analyzed PM2.5 samples collected during November 2015 to April 2016 in urban Yangzhou using a suite of techniques, in particular, an Aerodyne soot particle aerosol mass spectrometry (SP-AMS). The techniques used here reconstructed the majority of total PM2.5 measured where extracted species comprised on average 91...
March 25, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28345841/carcinogenic-liver-fluke-and-others-contaminated-in-pickled-fish-of-northeastern-thailand
#19
Ratchadawan Aukkanimart, Thidarut Boonmars, Pranee Sriraj, Panupan Sripan, Jiraporn Songsri, Panaratana Ratanasuwan, Porntip Laummaunwai, Apiporn Suwanantrai, Surasit Aunpromma, Sukhonthip Khueangchaingkhwang, Benjamabhorn Pumhirunroj, Atchara Artchayasawat, Narong Khuntikeo, Watcharin Loilome, Nisana Namwat, Puangrat Yongvanit, Sirintip Boonjaraspinyo
Twenty provinces in northeastern Thailand were investigated for fluke metacercariae contamination in pickled fish, or pla-som, during January –June 2016. A total of 129 pickled fish shops were randomly chosen. Samples were digested with acid-pepsin and those found to be infected with metacercariae were fed to hamsters to test for metacercariae infectivity. The results demonstrated that only 20.2% of the pla-som samples were infected with fluke metacercariae (mc), at various levels (1 to 268 mc/kg). All recovered fluke metacercariae were inactive, degenerated and could not develop to adults in the animal model...
February 1, 2017: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/28344190/an-artificial-intelligence-approach-fit-for-trna-gene-studies-in-the-era-of-big-sequence-data
#20
Yuki Iwasaki, Takashi Abe, Kennosuke Wada, Yoshiko Wada, Toshimichi Ikemura
Unsupervised data mining capable of extracting a wide range of knowledge from big data without prior knowledge or particular models is a timely application in the era of big sequence data accumulation in genome research. By handling oligonucleotide compositions as high-dimensional data, we have previously modified the conventional self-organizing map (SOM) for genome informatics and established BLSOM, which can analyze more than ten million sequences simultaneously. Here, we develop BLSOM specialized for tRNA genes (tDNAs) that can cluster (self-organize) more than one million microbial tDNAs according to their cognate amino acid solely depending on tetra- and pentanucleotide compositions...
March 24, 2017: Genes & Genetic Systems
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