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https://www.readbyqxmd.com/read/28915453/soil-organic-matter-in-podzol-horizons-of-the-amazon-region-humification-recalcitrance-and-dating
#1
Amanda M Tadini, Gustavo Nicolodelli, Giorgio S Senesi, Débora A Ishida, Célia R Montes, Yves Lucas, Stéphane Mounier, Francisco E G Guimarães, Débora M B P Milori
Characteristics of soil organic matter (SOM) are important, especially in the Amazon region, which represents one of the world's most relevant carbon reservoirs. In this work, the concentrations of carbon and differences in its composition (humification indexes) were evaluated and compared for several horizons (0 to 390cm) of three typical Amazonian podzol profiles. Fluorescence spectroscopy was used to investigate the humic acid (HA) fractions of SOM isolated from the different samples. Simple and labile carbon structures appeared to be accumulated in surface horizons, while more complex humified compounds were leached and accumulated in intermediate and deeper Bh horizons...
September 12, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28915375/the-presence-of-mercury-and-other-trace-metals-in-surface-soils-in-the-norwegian-arctic
#2
Katharina Halbach, Øyvind Mikkelsen, Torunn Berg, Eiliv Steinnes
Svalbard is an important study area for investigating the long-range transport of mercury (Hg) and other trace elements to the Arctic. Few studies have focused on their concentrations in Arctic soils. With ongoing climate change leading to thawing permafrost ground the soil compartment is of increasing importance in the Arctic. In this study, elemental composition and soil organic matter (SOM) content of surface and mineral soils in Svalbard are presented. The aim is to provide new data on soils in the Arctic and to gain more knowledge about the role of the soil in the biogeochemical cycle of mercury (Hg)...
September 7, 2017: Chemosphere
https://www.readbyqxmd.com/read/28912332/complete-genome-sequence-of-acute-hepatopancreatic-necrosis-disease-causing-vibrio-campbellii-la16-v1-isolated-from-penaeus-vannamei-cultured-in-a-latin-american-country
#3
Ye Som Ahn, Patharapol Piamsomboon, Kathy F J Tang, Jee Eun Han, Ji Hyung Kim
We report here the complete genome sequence of Vibrio campbellii, isolated from Penaeus vannamei cultured in a Latin American country. The Tn3-like transposon and pirAB genes were encoded on the plasmid pLA16-2. These data support the geographical variations in the virulence plasmid found among acute hepatopancreatic necrosis disease (AHPND)-causing Vibrio isolates from Latin America and Asia.
September 14, 2017: Genome Announcements
https://www.readbyqxmd.com/read/28911650/time-course-effects-of-fermentation-on-fatty-acid-and-volatile-compound-profiles-of-cheonggukjang-using-new-soybean-cultivars
#4
Kye Man Cho, Ho-Jeong Lim, Mi-So Kim, Da Som Kim, Chung Eun Hwang, Sang Hae Nam, Ok Soo Joo, Byong Won Lee, Jae Kyeom Kim, Eui-Cheol Shin
In this study, we investigated the effects of the potential probiotic Bacillus subtilis CSY191 on the fatty acid profiles of Cheonggukjang, a fermented soybean paste, prepared using new Korean brown soybean cultivars, protein-rich cultivar (Saedanbaek), and oil-rich cultivar (Neulchan). Twelve fatty acids were identified in the sample set-myristic, palmitic, palmitoleic, stearic, oleic, vaccenic, linoleic, α-linolenic, arachidic, gondoic, behenic, and lignoceric acids-yet, no specific changes driven by fermentation were noted in the fatty acid profiles...
July 2017: Journal of Food and Drug Analysis
https://www.readbyqxmd.com/read/28902844/melioidosis-in-lower-provincial-cambodia-a-case-series-from-a-prospective-study-of-sepsis-in-takeo-province
#5
Kevin L Schully, Catherine M Berjohn, Angela M Prouty, Amitha Fitkariwala, Tin Som, Darith Sieng, Michael J Gregory, Andrew Vaughn, Sim Kheng, Vantha Te, Christopher A Duplessis, James V Lawler, Danielle V Clark
Melioidosis is a severe infectious disease caused by the gram-negative soil bacterium Burkholderia pseudomallei. Melioidosis is well known to be a major cause of morbidity and mortality in Southeast Asia, particularly in Thailand. However, melioidosis remains underreported in surrounding areas such as Cambodia. We report a case series of melioidosis in seven patients from Takeo Province, Cambodia. The patients, aged 24-65 years, were enrolled from May 2014 to May 2015 during a one year prospective study of sepsis at Takeo Provincial Hospital...
September 13, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28900857/endovascular-biopsy-in-vivo-cerebral-aneurysm-endothelial-cell-sampling-and-gene-expression-analysis
#6
Daniel L Cooke, David B McCoy, Van V Halbach, Steven W Hetts, Matthew R Amans, Christopher F Dowd, Randall T Higashida, Devon Lawson, Jeffrey Nelson, Chih-Yang Wang, Helen Kim, Zena Werb, Charles McCulloch, Tomoki Hashimoto, Hua Su, Zhengda Sun
There is limited data describing endothelial cell (EC) gene expression between aneurysms and arteries partly because of risks associated with surgical tissue collection. Endovascular biopsy (EB) is a lower risk alternative to conventional surgical methods, though no such efforts have been attempted for aneurysms. We sought (1) to establish the feasibility of EB to isolate viable ECs by fluorescence-activated cell sorting (FACS), (2) to characterize the differences in gene expression by anatomic location and rupture status using single-cell qPCR, and (3) to demonstrate the utility of unsupervised clustering algorithms to identify cell subpopulations...
September 13, 2017: Translational Stroke Research
https://www.readbyqxmd.com/read/28894005/varicose-and-cheerio-collaborate-with-pebble-to-mediate-semaphorin-1a-reverse-signaling-in-drosophila
#7
Sangyun Jeong, Da-Som Yang, Young Gi Hong, Sarah P Mitchell, Matthew P Brown, Alex L Kolodkin
The transmembrane semaphorin Sema-1a acts as both a ligand and a receptor to regulate axon-axon repulsion during neural development. Pebble (Pbl), a Rho guanine nucleotide exchange factor, mediates Sema-1a reverse signaling through association with the N-terminal region of the Sema-1a intracellular domain (ICD), resulting in cytoskeletal reorganization. Here, we uncover two additional Sema-1a interacting proteins, varicose (Vari) and cheerio (Cher), each with neuronal functions required for motor axon pathfinding...
September 11, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28891042/a-novel-and-reliable-computational-intelligence-system-for-breast-cancer-detection
#8
Amin Zadeh Shirazi, Seyyed Javad Seyyed Mahdavi Chabok, Zahra Mohammadi
Cancer is the second important morbidity and mortality factor among women and the most incident type is breast cancer. This paper suggests a hybrid computational intelligence model based on unsupervised and supervised learning techniques, i.e., self-organizing map (SOM) and complex-valued neural network (CVNN), for reliable detection of breast cancer. The dataset used in this paper consists of 822 patients with five features (patient's breast mass shape, margin, density, patient's age, and Breast Imaging Reporting and Data System assessment)...
September 11, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/28888602/properties-of-acid-gels-made-from-sodium-caseinate-maltodextrin-conjugates-prepared-by-a-wet-heating-method
#9
Shuwen Zhang, Yuansheng Gong, Som Khanal, Yanjie Lu, John A Lucey
Covalent attachment of polysaccharides to proteins (conjugation) via the Maillard reaction has been extensively studied. Conjugation can lead to a significant improvement in protein functionality (e.g., solubility, emulsification, and heat stability). Caseins have previously been successfully conjugated with maltodextrin (Md), but the effect on the detailed acid gelation properties has not been examined. We studied the effect of conjugating sodium caseinate (NaCN) with 3 different sized Md samples via the Maillard reaction in aqueous solutions...
September 6, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28886555/effects-of-fe-iii-and-quality-of-humic-substances-on-as-v-distribution-in-freshwater-use-of-ultrafiltration-and-kohonen-neural-network
#10
Erik S J Gontijo, Cláudia H Watanabe, Adnívia S C Monteiro, Gilmare A da Silva, Hubert M P Roeser, Andre H Rosa, Kurt Friese
Humic substances (HS) are ubiquitous organic compounds able to affect mobility and availability of arsenic (As) in aquatic systems. Although it is known that associations between HS and As occur mainly via iron (Fe)-cationic bridges, the behaviour and distribution of this metalloid in HS- and Fe-rich environments is still not fully understood. In this paper, the quality of HS from different rivers in Brazil and Germany and its influence on the behaviour of As(V) under different Fe(III) concentrations were investigated...
August 29, 2017: Chemosphere
https://www.readbyqxmd.com/read/28885981/from-surnames-to-linguistic-and-genetic-diversity-five-centuries-of-internal-migrations-in-spain
#11
Roberto Rodríguez-Díaz, María José Blanco-Villegas, Franz Manni
In a previous study concerning 33,753 single Spanish surnames (considered as tokens) occurring 51,419,788 times we have shown that the present-day geography of contemporary surname variability in Spain still corresponds to the political geography of the country at the end of the Middle Ages. Here we reprocess the same database, by clustering surnames with Self-Organizing Maps (SOMs) according to their geographic distribution, to identify the monophyletic surnames showing a geo-historical origin in one of the 47 provinces of continental Spain...
September 1, 2017: Journal of Anthropological Sciences, Rivista di Antropologia: JASS
https://www.readbyqxmd.com/read/28885310/contact-allergy-to-hydroperoxides-of-linalool-and-d-limonene-in-a-us-population
#12
Neel Som Nath, Beiyu Liu, Cynthia Green, Amber Reck Atwater
BACKGROUND: Linalool and D-limonene are common fragrance ingredients that readily oxidize on exposure to air. The resulting hydroperoxides of linalool and D-limonene have been shown to have high frequencies of positive patch test reactions in several European and international studies. OBJECTIVE: The aim of the study was to investigate the prevalence of contact allergy to the hydroperoxides of linalool and D-limonene in a US population. METHODS: In this retrospective study, 103 patients with suspected fragrance allergy were patch tested to linalool 10% petrolatum (pet), hydroperoxides of linalool 1% pet, D-limonene 10% pet, and/or the hydroperoxides of D-limonene 0...
September 2017: Dermatitis
https://www.readbyqxmd.com/read/28884676/the-mtrab-two-component-system-controls-antibiotic-production-in-streptomyces-coelicolor-a3-2
#13
Nicolle F Som, Daniel Heine, Neil Holmes, Felicity Knowles, Govind Chandra, Ryan F Seipke, Paul A Hoskisson, Barrie Wilkinson, Matthew I Hutchings
MtrAB is a highly conserved two-component system implicated in the regulation of cell division in the Actinobacteria. It coordinates DNA replication with cell division in the unicellular Mycobacterium tuberculosis and links antibiotic production to sporulation in the filamentous Streptomyces venezuelae. Chloramphenicol biosynthesis is directly regulated by MtrA in S. venezuelae and deletion of mtrB constitutively activates MtrA and results in constitutive over-production of chloramphenicol. Here we report that in Streptomyces coelicolor, MtrA binds to sites upstream of developmental genes and the genes encoding ActII-1, ActII-4 and RedZ, which are cluster-situated regulators of the antibiotics actinorhodin (Act) and undecylprodigiosin (Red)...
September 8, 2017: Microbiology
https://www.readbyqxmd.com/read/28875383/distribution-characteristics-of-heavy-metal-loid-s-in-aggregates-of-different-size-fractions-along-contaminated-paddy-soil-profile
#14
Bin Huang, Zhongwu Li, Dingqiang Li, Zaijian Yuan, Zhiliang Chen, Jinquan Huang
Soil aggregates exert a significant influence on the retention and availability of heavy metal(loid)s in soil. In this study, the concentration distribution and chemical forms of heavy metals (Cu, Zn, Cd, Pb, and Hg) and a metalloid (As) in different aggregate-sized fractions (2-0.25, 0.25-0.05, 0.05-0.002, and < 0.002 mm) along the profile (0-1, 1-5, 5-15, and 15-25 cm) of a contaminated paddy field were investigated. The results showed that the values of pH, free Fe oxides (Fed), bulk density, and catalase activity gradually increased, whereas the soil organic matter (SOM), cation exchange capacity (CEC), electrical conductivity (EC), microbial biomass carbon (MBC), and urease activity decreased with depth...
September 5, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28872095/laparoscopic-excision-of-the-choledochal-cyst-in-adult-patients-an-experience
#15
Hirdaya Hulas Nag, Kshitij Sisodia, Pushap Sheetal, Hari Govind, Som Chandra
BACKGROUND: Laparoscopic choledochal cyst excision (LCCE) in adult patients is not common. AIMS: The aim is to report our experience of LCCE in adult patients. PATIENTS AND METHODS: This study includes a retrospective review of twenty adult patients (age >18 years) with choledochal cyst (CC) who underwent LCCE by a single surgical team from February 2011 to April 2016. RESULTS: The mean age was 45.5 years. Nineteen (95%) patients had Type-I CC, and one patient (5%) had Type-IV CC (Todani's classification)...
October 2017: Journal of Minimal Access Surgery
https://www.readbyqxmd.com/read/28871609/the-origin-of-soil-organic-matter-controls-its-composition-and-bioreactivity-across-a-mesic-boreal-forest-latitudinal-gradient
#16
Lukas Kohl, Michael Philben, Kate A Edwards, Frances A Podrebarac, Jamie Warren, Susan E Ziegler
Warmer climates have been associated with reduced bioreactivity of soil organic matter (SOM) typically attributed to increased diagenesis; the combined biological and physiochemical transformation of SOM. Additionally, cross site studies have indicated that ecosystem regime shifts, associated with long-term climate warming, can affect SOM properties through changes in vegetation and plant litter production thereby altering the composition of soil inputs. The relative importance of these two controls, diagenesis and inputs, on SOM properties as ecosystems experience climate warming, however, remains poorly understood...
September 4, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28869925/cadmium-stress-assessment-based-on-the-electrocardiogram-characteristics-of-zebra-fish-danio-rerio-qrs-complex-could-play-an-important-role
#17
Na Xing, Lizhen Ji, Jie Song, Jingchun Ma, Shangge Li, Zongming Ren, Fei Xu, Jianping Zhu
The electrocardiogram (ECG) of zebra fish (Danio rerio) expresses cardiac features that are similar to humans. Here we use sharp microelectrode measurements to obtain ECG characteristics in adult zebra fish and analyze the effects of cadmium chloride (CdCl2) on the heart. We observe the overall changes of ECG parameters in different treatments (0.1 TU, 0.5 TU and 1.0 TU CdCl2), including P wave, Q wave, R wave, S wave, T wave, PR interval (atrial contraction), QRS complex (ventricular depolarization), ST segment, and QT interval (ventricular repolarization)...
August 31, 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28866559/somflow-guided-exploratory-cluster-analysis-with-self-organizing-maps-and-analytic-provenance
#18
Dominik Sacha, Matthias Kraus, Jurgen Bernard, Michael Behrisch, Tobias Schreck, Yuki Asano, Daniel A Keim
Clustering is a core building block for data analysis, aiming to extract otherwise hidden structures and relations from raw datasets, such as particular groups that can be effectively related, compared, and interpreted. A plethora of visual-interactive cluster analysis techniques has been proposed to date, however, arriving at useful clusterings often requires several rounds of user interactions to fine-tune the data preprocessing and algorithms. We present a multi-stage Visual Analytics (VA) approach for iterative cluster refinement together with an implementation (SOMFlow) that uses Self-Organizing Maps (SOM) to analyze time series data...
August 29, 2017: IEEE Transactions on Visualization and Computer Graphics
https://www.readbyqxmd.com/read/28862663/novelty-detection-classifiers-in-weed-mapping-silybum-marianum-detection-on-uav-multispectral-images
#19
Thomas K Alexandridis, Afroditi Alexandra Tamouridou, Xanthoula Eirini Pantazi, Anastasia L Lagopodi, Javid Kashefi, Georgios Ovakoglou, Vassilios Polychronos, Dimitrios Moshou
In the present study, the detection and mapping of Silybum marianum (L.) Gaertn. weed using novelty detection classifiers is reported. A multispectral camera (green-red-NIR) on board a fixed wing unmanned aerial vehicle (UAV) was employed for obtaining high-resolution images. Four novelty detection classifiers were used to identify S. marianum between other vegetation in a field. The classifiers were One Class Support Vector Machine (OC-SVM), One Class Self-Organizing Maps (OC-SOM), Autoencoders and One Class Principal Component Analysis (OC-PCA)...
September 1, 2017: Sensors
https://www.readbyqxmd.com/read/28862553/transorbital-endoscopic-eyelid-approach-for-resection-of-sphenoorbital-meningiomas-with-predominant-hyperostosis-report-of-2-cases
#20
João Paulo Almeida, Sacit B Omay, Sathwik R Shetty, Yu-Ning Chen, Armando S Ruiz-Treviño, Buqing Liang, Vijay K Anand, Benjamin Levine, Theodore H Schwartz
Sphenoorbital meningiomas (SOMs) are slow-growing tumors that originate from the sphenoidal wing and are associated with visual deterioration, extrinsic ocular movement disorders, and proptosis caused by hyperostosis of the lateral wall of the orbit. In some cases, the intracranial component is quite small or "en plaque," and the majority of the symptoms arise from adjacent hyperostosis. Craniotomy has traditionally been the standard of care, but new minimally invasive multiportal endoscopic approaches offer an alternative...
September 1, 2017: Journal of Neurosurgery
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