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https://www.readbyqxmd.com/read/28926809/spatial-distribution-of-glomalin-related-soil-protein-and-its-relationship-with-sediment-carbon-sequestration-across-a-mangrove-forest
#1
Qiang Wang, Haoliang Lu, Jingyan Chen, Hualong Hong, Jingchun Liu, Junwei Li, Chongling Yan
Arbuscular mycorrhizal (AM) fungi produce a recalcitrant glycoprotein, (glomalin-related soil protein (GRSP)), which can contribute to soil carbon sequestration. Here we made a first study to characterize the spatial distribution of GRSP fractions in a mangrove forest at Zhangjiang Estuary, Southeastern China and to explore potential contributions of GRSP to sediment organic carbon (SOC) in this forest. We identified GRSP fractions in surface sediments, as well as those at a depth of 50 cm. The contents of easily extractable GRSP (EE-GRSP), total GRSP (T-GRSP), GRSP in particulate organic matter (POM-GRSP) and GRSP in pore water (PW-GRSP) ranged between 1...
September 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28924917/high-heterogeneity-in-soil-composition-and-quality-in-different-mangrove-forests-of-venezuela
#2
X L Otero, A Méndez, G N Nóbrega, T O Ferreira, W Meléndez, F Macías
Mangrove forests play an important role in biogeochemical cycles of metals, nutrients, and C in coastal ecosystems. However, these functions could be strongly affected by the mangrove soil degradation. In this study, we performed an intensive sampling characterizing mangrove soils under different types of environment (lagoon/gulf) and vegetation (Rhizophora/Avicennia/dead mangrove) in the Venezuelan coast. To better understand the spatial heterogeneity of the composition and characteristics of the soils, a wide range of the soil attributes were analyzed...
September 18, 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28924616/soil-transmitted-helminth-infections-are-not-associated-with-compromised-antibody-responses-to-previously-administered-measles-and-tetanus-vaccines-among-hiv-1-infected-art-na%C3%A3-ve-kenyan-adults
#3
Helen L Storey, Benson Singa, Jackie Naulikha, Helen Horton, Barbra A Richardson, Grace John-Stewart, Judd L Walson
In many regions of sub-Saharan Africa, both HIV and helminth infections are prevalent. HIV-1 (human immunodeficiency virus type 1) and helminth infections can both compromise immune responses in humans. To determine whether the presence of helminth infection or the treatment of helminth infection alters unstimulated vaccine responses among HIV-1 infected individuals, we conducted two nested serologic studies. Blood samples were collected for HIV disease monitoring and vaccine-specific serologic assays, while stool was evaluated by direct microscopy methods...
February 2017: Parasite Epidemiology and Control
https://www.readbyqxmd.com/read/28924082/analysis-of-cleaning-process-for-several-kinds-of-soil-by-probability-density-functional-method
#4
Akihiro Fujimoto, Terumasa Tanaka, Masaru Oya
A method of analyzing the detergency of various soils by assuming normal distributions for the soil adhesion and soil removal forces was developed by considering the relationship between the soil type and the distribution profile of the soil removal force. The effect of the agitation speed on the soil removal was also analyzed by this method. Washing test samples were prepared by soiling fabrics with individual soils such as particulate soils, oily dyes, and water-soluble dyes. Washing tests were conducted using a Terg-O-Tometer and four repetitive washing cycles of 5 min each...
September 15, 2017: Journal of Oleo Science
https://www.readbyqxmd.com/read/28923753/concentration-and-spatial-distribution-of-organophosphate-esters-in-the-soil-sediment-profile-of-kathmandu-valley-nepal-implication-for-risk-assessment
#5
Ishwar Chandra Yadav, Ningombam Linthoingambi Devi, Jun Li, Gan Zhang, Adrian Covaci
Despite the fact that soil and sediments, which act as a sink or potential source of organic pollutants, have been polluted with organophosphate esters (OPEs) around the globe, extremely constrained data is accessible on environmental concentration and fate of OPEs in solid matrices in whole of the South Asia particularly if there should be an occurrence in Nepal. In this study, surface soil (N=19) and sediments samples (N=20) were analyzed for eight different OPE in Kathmandu Valley during October 2014. The concentration of ∑8OPE measured in sediments samples was 12 times higher than soil and ranged 983-7460ng/g dw (median 2210ng/g dw) and 65-27,500ng/g dw (186ng/g dw), respectively...
September 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28923752/anthropogenic-and-geogenic-mass-input-of-trace-elements-to-moss-and-natural-surface-soil-in-norway
#6
Erik R Christensen, Eiliv Steinnes, Ola Anfin Eggen
Data sets for concentrations of up to 22 elements including Pb, Cd, Ag, As, and Hg and several rare earth elements (REEs) in moss and surface soil from all over mainland Norway are analyzed by positive matrix factorization (PMF) and principal component analysis (PCA) with centered log-ratio transformation. Moss and soil samples collected in 2010 and 2005, respectively, show both a distinct long-range atmospheric transport PMF factor including a dominant Pb loading along with smaller loadings of Mo, Cd, Sb, and As, and a geogenic factor dominated by Ce, La, and Y...
September 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28923728/natural-variation-of-selenium-in-brazil-nuts-and-soils-from-the-amazon-region
#7
E C Silva Junior, L H O Wadt, K E Silva, R M B Lima, K D Batista, M C Guedes, G S Carvalho, T S Carvalho, A R Reis, G Lopes, L R G Guilherme
Brazil nut tree (Bertholletia excelsa) is native of the Amazon rainforest. Brazil nuts are consumed worldwide and are known as the richest food source of selenium (Se). Yet, the reasoning for such Se contents is not well stablished. We evaluated the variation in Se concentration of Brazil nuts from Brazilian Amazon basin, as well as soil properties, including total Se concentration, of the soils sampled directly underneath the trees crown, aiming to investigate which soil properties influence Se accumulation in the nuts...
September 4, 2017: Chemosphere
https://www.readbyqxmd.com/read/28923475/chemical-and-nano-mineralogical-study-for-determining-potential-uses-of-legal-colombian-gold-mine-sludge-experimental-evidence
#8
Nazly E Sánchez-Peña, José L Narváez-Semanate, Daniela Pabón-Patiño, Javier E Fernández-Mera, Marcos L S Oliveira, Kátia da Boit, Bernardo F Tutikian, Tito J Crissien, Diana C Pinto, Iván D Serrano, Claudia I Ayala, Ana L Duarte, José D Ruiz, Luis F O Silva
The present study is focused on the chemical and nano-mineralogical characterization of sludge from gold mine activities, in order to put forward diverse solution alternatives, where lack of knowledge has been found. The sample was collected from "La Estrella" mine of Suarez, located in Department of Cauca, south-west Colombia. The sludge micro-structure and chemical composition were analyzed using a high resolution transmission electron microscopy (HR-TEM) equipped with a dispersive X-ray detector (EDS). X-ray diffraction technique was employed to identify the mineralogical phases present in the sludge...
August 26, 2017: Chemosphere
https://www.readbyqxmd.com/read/28923297/quick-analysis-of-organic-matter-in-soil-by-energy-dispersive-x-ray-fluorescence-and-multivariate-analysis
#9
Franslley Morona, Felipe R Dos Santos, André M Brinatti, Fábio L Melquiades
The rapid, simple and accurate determination of soil quality indicators is fundamental for improvements in precision agriculture and consequently in production efficiency. The objectives of this study were to determine the organic matter (OM) and total organic carbon (TOC) concentrations in agricultural soil and to discriminate soil provenance by energy-dispersive X-ray fluorescence (EDXRF) combined with principal component analysis and partial least square regression. The conventional methods used for the determination of OM and TOC concentrations are the gravimetric and Walkley-Black methods, respectively...
September 8, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28923008/an-eleven-year-retrospective-hospital-based-study-of-epidemiological-data-regarding-human-strongyloidiasis-in-northeast-thailand
#10
Thidarat K Prasongdee, Pokkamol Laoraksawong, Wanida Kanarkard, Ratthaphol Kraiklang, Kraisit Sathapornworachai, Sureeporn Naonongwai, Porntip Laummaunwai, Oranuch Sanpool, Pewpan M Intapan, Wanchai Maleewong
BACKGROUND: Human strongyloidiasis is a chronic and persistent gastrointestinal disease caused by infection with soil-transmitted helminths of the genus Strongyloides. The aim of this research was to obtain diagnostic prevalence regarding strongyloidiasis in northeast Thailand through a hospital-based study. METHODS: Patients' demographic data and the results of stool examinations conducted using the formalin ethyl acetate concentration technique were collected from the parasitology laboratory records at Srinagarind Hospital in Khon Kaen, Thailand...
September 18, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28922638/reverse-flow-injection-spectrophotometric-determination-of-ciprofloxacin-in-pharmaceuticals-using-iron-from-soil-as-a-green-reagent
#11
Sysay Palamy, Wirat Ruengsitagoon
A novel reverse flow injection spectrophotometric method for the determination of ciprofloxacin was successfully combined with the on-line introduction of an iron solution extracted from soil as green reagent. The assay was optimized by a univariate method to select the optimum conditions for the highest absorbance and highest stability of the complex. Beer-Lambert's law (λmax=440nm) is obeyed in the range 0.5-50μgmL(-1) with a correlation coefficient (r(2)) of 0.9976 and 0.9996 using soil as green reagent from Khon Kaen, Thailand and Vientiane, Laos, respectively...
September 13, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28922554/performance-comparison-of-dispersive-solid-phase-extraction-and-multiplug-filtration-cleanup-methods-for-the-determination-of-tefuryltrione-in-plant-and-environmental-samples-using-uhplc-ms-ms
#12
Yang Yu, Yan Tao, Fengshou Dong, Jun Xu, Xingang Liu, Xiaohu Wu, Mingshan Ji, Yongquan Zheng
The detection frequencies of tefuryltrione, a new type of 4-hydroxyphenyl-pyruvate dioxygenase inhibitor herbicide, are rarely reported, probably because of the paucity of analytical methods. Herein, an effective and sensitive analytical method has been developed to detect tefuryltrione in vegetables (tomato and cucumber), cereals (rice and corn), soil and water by ultra high performance liquid chromatography coupled with tandem mass spectrometry. Comparisons of the performances of dispersive solid-phase extraction and multiplug filtration cleanup methods were carried out for tefuryltrione in complex matrices...
September 18, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28921530/sympatric-parallel-diversification-of-major-oak-clades-in-the-americas-and-the-origins-of-mexican-species-diversity
#13
Andrew L Hipp, Paul S Manos, Antonio González-Rodríguez, Marlene Hahn, Matthew Kaproth, John D McVay, Susana Valencia Avalos, Jeannine Cavender-Bares
Oaks (Quercus, Fagaceae) are the dominant tree genus of North America in species number and biomass, and Mexico is a global center of oak diversity. Understanding the origins of oak diversity is key to understanding biodiversity of northern temperate forests. A phylogenetic study of biogeography, niche evolution and diversification patterns in Quercus was performed using 300 samples, 146 species. Next-generation sequencing data were generated using the restriction-site associated DNA (RAD-seq) method. A time-calibrated maximum likelihood phylogeny was inferred and analyzed with bioclimatic, soils, and leaf habit data to reconstruct the biogeographic and evolutionary history of the American oaks...
September 18, 2017: New Phytologist
https://www.readbyqxmd.com/read/28920834/streptomyces-xylanilyticus-sp-nov-isolated-from-soil
#14
Duangtip Moonmangmee, Pawina Kanchanasin, Wongsakorn Phongsopitanun, Somboon Tanasupawat, Somporn Moonmangmee
A novel actinomycete, strain SR2-123T, belonging to the genus Streptomyces, was isolated from a soil sample collected from the Sakaerat Environmental Research Station, Thailand Institute of Scientific and Technological Research, Nakhon Ratchasima Province, Thailand. The taxonomic position of the strain was characterized using a polyphasic study. Strain SR2-123T contained ll-diaminopimelic acid, glucose, mannose and ribose in whole-cell hydrolysates. The N-acyl type of muramic acid was acetyl. Menaquinones were MK-9(H6), MK-9(H8) and MK-9(H4)...
September 18, 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28920774/kinetics-of-diuron-under-aerobic-condition-and-residue-analysis-in-sugarcane-under-subtropical-field-conditions
#15
Shishir Tandon, Ravi Pant
Phenylureas group are persistent herbicides compared to other groups. However, their dissipation in different ecosystem should be investigated as they are major pollutant to soil and water. Dissipation kinetics of diuron at two application rates, in texturally different soils under sugarcane field conditions was investigated. Diuron was extracted from the soil with acetone and florisil SPE cleanup and extracted diuron was characterized by HPLC-UV. Diuron dissipated slowly in soils and persisted for more than 100 days...
September 18, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28920758/occurrence-and-source-apportionment-of-polycyclic-aromatic-hydrocarbons-in-soils-and-sediment-from-hanfeng-lake-three-gorges-china
#16
Jing Cai, Shutao Gao, Like Zhu, Xuwei Jia, Xiangying Zeng, Zhiqiang Yu
This study was conducted to investigate the pollutant status and the retention mechanism of polycyclic aromatic hydrocarbons (PAHs) in soils and sediment from bank-water-level-fluctuating zone (WLFZ)-water systems in Hanfeng Lake, Three Gorges, China. The concentrations of the 16 PAHs ranged from 21.8 to 1324 ng g(-1) dry wt for all 20 soil and sediment samples. These concentration levels were remarkably lower than those in soils and sediment collected domestically and worldwide. PAHs with two and three rings were found to be dominant in all the samples, with phenanthrene being most abundant...
September 18, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28920403/comparison-of-bacterial-communities-in-leachate-from-decomposing-bovine-carcasses
#17
Seung-Hak Yang, Hee Kwon Ahn, Bong Soo Kim, Sun Sik Chang, Ki Yong Chung, Eun Mi Lee, Kwang Seok Ki, Eung Gi Kwon
Objective: Burial is associated with environmental effects such as the contamination of ground or surface water with biological materials generated during the decomposition process. Therefore, bacterial communities in leachates originating from the decomposing bovine carcasses were investigated. Methods: To understand the process of bovine (Hanwoo) carcass decomposition, we simulated burial using a lab-scale reactor with a volume of 5.15 m3. Leachate samples from 3 carcasses were collected using a peristaltic pump once a month for a period of 5 months, and bacterial communities in samples were identified by pyrosequencing of the 16S rRNA gene...
September 18, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28919889/dehalococcoides-as-a-potential-biomarker-evidence-for-uncharacterized-organohalides-in-environmental-samples
#18
Qihong Lu, Ling Yu, Zhiwei Liang, Qingyun Yan, Zhili He, Tiangang Luan, Dawei Liang, Shanquan Wang
The massive production and improper disposal of organohalides resulted in worldwide contamination in soil and water. However, their environmental survey based on chromatographic methods was hindered by challenges in testing the extremely wide variety of organohalides. Dehalococcoides as obligate organohalide-respiring bacteria exclusively use organohalides as electron acceptors to support their growth, of which the presence could be coupled with organohalides and, therefore, could be employed as a biomarker of the organohalide pollution...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28919882/effects-of-soil-pre-treatment-with-basamid%C3%A2-granules-brassica-juncea-raphanus-sativus-and-tagetes-patula-on-bacterial-and-fungal-communities-at-two-apple-replant-disease-sites
#19
Bunlong Yim, Heike Nitt, Andreas Wrede, Samuel Jacquiod, Søren J Sørensen, Traud Winkelmann, Kornelia Smalla
Nurseries producing apple and rose rootstock plants, apple orchards as well as rose production often experience replanting problems after several cultivations at the same site when a chemical soil disinfectant is not applied. The etiology of apple and rose replanting problems is most likely caused by soil-borne pathogen complex, defined as "replant disease (RD)". Symptoms typical of RD are reduced shoot and root growth, a smaller leaf area, a significant decrease in plant biomass, yield and fruit quality and a shorter life span...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28919016/metarhizium-brunneum-an-enzootic-wireworm-disease-and-evidence-for-its-suppression-by-bacterial-symbionts
#20
Todd Kabaluk, Erica Li-Leger, Sean Nam
Wireworms (Coleoptera: Elateridae) are serious agricultural pests, with soil-dwelling larvae attacking subterranean tissues of crop plants and their fruit when in contact with the soil surface. Researchers collect wireworms for laboratory experiments to study their behaviour and test pest control agents but frequently lose them to Metarhizium Petch (Ascomycota: Hypocreales: Clavicipitaceae) infection. We found latent M. brunneum infection in 13-100% of live, asymptomatic Agriotes obscurus and A. lineatus wireworms acquired from agricultural fields and in wireworms maintained indoors, indicating its enzootic presence...
September 14, 2017: Journal of Invertebrate Pathology
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