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Soil sampling method

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https://www.readbyqxmd.com/read/28930999/measuring-and-mapping-patterns-of-soil-erosion-and-deposition-related-to-soil-carbonate-concentrations-under-agricultural-management
#1
Robert H Erskine, Lucretia A Sherrod, Timothy R Green
Spatial patterns of soil erosion and deposition can be inferred from differences in ground elevation mapped at appropriate time increments. Such changes in elevation are related to changes in near-surface soil carbonate (CaCO3) profiles. The objective is to describe a simple conceptual model and detailed protocol for repeatable field and laboratory measurements of these quantities. Here, accurate elevation is measured using a ground-based differential global positioning system (GPS); other data acquisition methods could be applied to the same basic method...
September 12, 2017: Journal of Visualized Experiments: JoVE
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
#2
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
#3
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/28923297/quick-analysis-of-organic-matter-in-soil-by-energy-dispersive-x-ray-fluorescence-and-multivariate-analysis
#4
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
#5
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
#6
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
#7
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
#8
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/28919889/dehalococcoides-as-a-potential-biomarker-evidence-for-uncharacterized-organohalides-in-environmental-samples
#9
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/28915421/determination-of-chlormequat-and-mepiquat-residues-and-their-dissipation-rates-in-tomato-cultivation-matrices-by-ultra-performance-liquid-chromatography-tandem-mass-spectrometry
#10
Hongxia Zhang, Zheng Feei Ma, Haiyan Yang, Lingming Kong
This study described the development and validation of a simple, rapid, specific and sensitive method for detecting chlormequat chloride (CQ) and mepiquat chloride (MQ) residues in tomato cultivation matrices covering soil, water, seedling samples. The dissipation rates of CQ and MQ in tomato cultivation matrices were also determined in this study. A Hydrophilic Interaction Liquid Chromatography (HILIC) column was used for chromatographic separation. A triple quadrupole mass spectrometer equipped with an electrospray ionisation source in positive ion mode by multiple reaction monitoring was used for detection...
September 8, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28911333/profiling-bacterial-communities-by-minion-sequencing-of-ribosomal-operons
#11
Lee J Kerkhof, Kevin P Dillon, Max M Häggblom, Lora R McGuinness
BACKGROUND: An approach utilizing the long-read capability of the Oxford Nanopore MinION to rapidly sequence bacterial ribosomal operons of complex natural communities was developed. Microbial fingerprinting employs domain-specific forward primers (16S rRNA subunit), reverse primers (23S rRNA subunit), and a high-fidelity Taq polymerase with proofreading capabilities. Amplicons contained both ribosomal subunits for broad-based phylogenetic assignment (~ 3900 bp of sequence), plus the intergenic spacer (ITS) region (~ 300 bp) for potential strain-specific identification...
September 15, 2017: Microbiome
https://www.readbyqxmd.com/read/28906012/pacbio-metabarcoding-of-fungi-and-other-eukaryotes-errors-biases-and-perspectives
#12
Leho Tedersoo, Ave Tooming-Klunderud, Sten Anslan
Second-generation, high-throughput sequencing methods have greatly improved our understanding of the ecology of soil microorganisms, yet the short barcodes (< 500 bp) provide limited taxonomic and phylogenetic information for species discrimination and taxonomic assignment. Here, we utilized the third-generation Pacific Biosciences (PacBio) RSII and Sequel instruments to evaluate the suitability of full-length internal transcribed spacer (ITS) barcodes and longer rRNA gene amplicons for metabarcoding Fungi, Oomycetes and other eukaryotes in soil samples...
September 14, 2017: New Phytologist
https://www.readbyqxmd.com/read/28905410/simultaneous-determination-of-boscalid-and-fludioxonil-in-grape-and-soil-under-field-conditions-by-gas-chromatography-tandem-triple-quadrupole-mass-spectrometry
#13
Haizhen Zhang, A'wei Zhang, Min Huang, Weiwei Yu, Zhurui Li, Sizhuo Wu, Kunming Zhang, Kankan Zhang, Deyu Hu
A gas chromatography-tandem mass spectrometry method was developed and validated to simultaneously determine boscalid and fludioxonil in grape and soil samples. These samples were extracted with 10 mL of acetonitrile and purified using a mixed primary secondary amine/octadecylsilane sorbent. The method showed good linearity (R(2) >0.99) in the calibration range 0.005-2 μg/mL for both pesticides. The limits of detection and quantification for the two analytes in grape and soil were 0.006 mg/kg and 0.02 mg/kg, respectively...
September 14, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28899490/a-new-ph-indicator-dye-based-method-for-rapid-and-efficient-screening-of-l-asparaginase-producing-microorganisms
#14
Kanti N Mihooliya, Jitender Nandal, Laxmi Swami, Himanshu Verma, Lipsy Chopra, Debendra K Sahoo
l-asparaginase is a pharmaceutically and industrially important enzyme as it has potential to treat different cancers and inhibit acrylamide formation in fried and baked food products. In the present study, an attempt was made to screen for new and novel l-asparaginase producers using a widely applied phenol red and bromothymol blue (BTB)(1) dye-based plate assay. Screening of four different soil samples for l-asparaginase producers resulted in the isolation of three new potential l-asparaginase producing bacteria...
December 2017: Enzyme and Microbial Technology
https://www.readbyqxmd.com/read/28899362/nationwide-cross-sectional-survey-of-schistosomiasis-and-soil-transmitted-helminthiasis-in-sudan-study-protocol
#15
Seungman Cha, Sung-Tae Hong, Young-Ha Lee, Keon Hoon Lee, Dae Seong Cho, Jinmoo Lee, Jong-Yil Chai, Mousab Siddig Elhag, Soheir Gabralla Ahmad Khaled, Mustafa Khidir Mustafa Elnimeiri, Nahid Abdelgadeir Ali Siddig, Hana Abdelrazig, Sarah Awadelkareem, Azza Tag Eldin Elshafie, Hassan Ahmed Hassan Ahmed Ismail, Mutamad Amin
BACKGROUND: Schistosomiasis and soil-transmitted helminthiasis (STHs) are target neglected tropical diseases (NTDs) of preventive chemotherapy, but the control and elimination of these diseases have been impeded due to resource constraints. Few reports have described study protocol to draw on when conducting a nationwide survey. We present a detailed methodological description of the integrated mapping of schistosomiasis and STHs on the basis of our experiences, hoping that this protocol can be applied to future surveys in similar settings...
September 12, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28894961/digital-soil-mapping-using-remote-sensing-indices-terrain-attributes-and-vegetation-features-in-the-rangelands-of-northeastern-iran
#16
Ebrahim Mahmoudabadi, Alireza Karimi, Gholam Hosain Haghnia, Adel Sepehr
Digital soil mapping has been introduced as a viable alternative to the traditional mapping methods due to being fast and cost-effective. The objective of the present study was to investigate the capability of the vegetation features and spectral indices as auxiliary variables in digital soil mapping models to predict soil properties. A region with an area of 1225 ha located in Bajgiran rangelands, Khorasan Razavi province, northeastern Iran, was chosen. A total of 137 sampling sites, each containing 3-5 plots with 10-m interval distance along a transect established based on randomized-systematic method, were investigated...
September 11, 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28894273/impacts-of-aquaculture-wastewater-irrigation-on-soil-microbial-functional-diversity-and-community-structure-in-arid-regions
#17
Lijuan Chen, Qi Feng, Changsheng Li, Yongping Wei, Yan Zhao, Yongjiu Feng, Hang Zheng, Fengrui Li, Huiya Li
Aquaculture wastewater is one of the most important alternative water resources in arid regions where scarcity of fresh water is common. Irrigation with this kind of water may affect soil microbial functional diversity and community structure as changes of soil environment would be significant. Here, we conducted a field sampling to investigate these effects using Biolog and metagenomic methods. The results demonstrated that irrigation with aquaculture wastewater could dramatically reduce soil microbial functional diversity...
September 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28892376/modifications-to-epa-method-3060a-to-improve-extraction-of-cr-vi-from-chromium-ore-processing-residue-contaminated-soils
#18
Christopher T Mills, Carleton R Bern, Ruth E Wolf, Andrea L Foster, Jean M Morrison, William M Benzel
It has been shown that EPA Method 3060A does not adequately extract Cr(VI) from chromium ore processing residue (COPR). We modified various parameters of EPA 3060A toward understanding the transformation of COPR minerals in the alkaline extraction and improving extraction of Cr(VI) from NIST SRM 2701, a standard COPR-contaminated soil. Aluminum and Si were the major elements dissolved from NIST 2701, and their concentrations in solution were correlated with Cr(VI). The extraction fluid leached additional Al and Si from the method-prescribed borosilicate glass vessels which appeared to suppress the release of Cr(VI)...
September 11, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28890887/isolation-and-characterization-of-actinobacteria-from-algerian-sahara-soils-with-antimicrobial-activities
#19
Harir Mohamed, Bellahcene Miloud, Fortas Zohra, José María García-Arenzana, Antonio Veloso, Susana Rodríguez-Couto
Extreme ecosystems can be a source of untapped microorganisms to produce novel bioactive compounds of industrial interest. Consequently, in this work, 32 actinomycetes were isolated from 6 soil samples collected from Algerian Sahara in searching for untapped producers of novel antimicrobial compounds. All the isolates were further subjected to antimicrobial screening against pathogenic bacteria, yeast and fungi. The obtained results indicated that three of the isolates (named C, MS1 and 10) showed antimicrobial activities against most of the tested pathogenic microorganisms...
2017: International Journal of Molecular and Cellular Medicine
https://www.readbyqxmd.com/read/28886535/groundwater-assessment-and-environmental-impact-in-the-abandoned-mine-of-kettara-morocco
#20
Julien Moyé, Tanguy Picard-Lesteven, Lahcen Zouhri, Khalid El Amari, Mohamed Hibti, Abdelfattah Benkaddour
Many questions about the soil pollution due to mining activities have been analyzed by numerous methods which help to evaluate the dispersion of the Metallic Trace Elements (MTE) in the soil and stream sediments of the abandoned mine of Kettara (Morocco). The transport of these MTE could have an important role in the degradation of groundwater and the health of people who are living in the vicinity. The present paper aims to evaluate the groundwater samples from 15 hydrogeological wells. This evaluation concerns the hydrogeological parameters, pH, Electrical conductivity, temperature and the groundwater level, and the geochemical assessment of Mg, Ca, Ti, Cr, Mn, Fe, Co, Ni, Zn, Cu, As, Se, Cd, Sb, Tl and Pb...
September 5, 2017: Environmental Pollution
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