keyword
MENU ▼
Read by QxMD icon Read
search

Soil sampling method

keyword
https://www.readbyqxmd.com/read/28523826/occurrence-and-abundance-of-ammonia-oxidizing-archaea-and-bacteria-from-the-surface-to-below-the-water-table-in-deep-soil-and-their-contributions-to-nitrification
#1
Lei Zheng, Xue Zhao, Guibing Zhu, Wei Yang, Chao Xia, Tao Xu
Using molecular biology methods (qualitative and quantitative PCR), we determined the occurrence and abundance of ammonia-oxidizing archaea (AOA) and ammonia-oxidizing bacteria (AOB) from a dry inland soil in Basel, Switzerland, and from the riparian zone of Baiyangdian Lake, China. We also determined the contributions of these microorganisms to ammonia oxidization at different depths based on the nitrification rate. The number of archaeal amoA genes (the key functional gene in AOA) was larger than the number of bacterial amoA genes in each sample, suggesting a dominant role for the AOA amoA gene in environments with a low ammonium concentration...
May 19, 2017: MicrobiologyOpen
https://www.readbyqxmd.com/read/28523616/the-effect-of-multiple-contamination-of-soil-on-lmw-and-mmw-pahs-accumulation-in-the-roots-of-rubus-fruticosus-l-naturally-growing-near-the-copper-mining-and-smelting-complex-bor-east-serbia
#2
Slađana Č Alagić, Vesna P Stankov Jovanović, Violeta D Mitić, Jelena S Nikolić, Goran M Petrović, Snežana B Tošić, Gordana S Stojanović
Samples of roots and spatial soils of native Rubus fruticosus L. were collected from the spots positioned at different distances from the copper smelter and city heating plants in the industrial zone of the town of Bor (Serbia) and subjected to chemical analyses in order to determine the content of several heavy metals, and 15 priority polycyclic aromatic hydrocarbons (PAHs). In this study, the results for 9 low and medium molecular weight PAHs (LMW and MMW PAHs) are represented and processed using the calculation of bio-concentration factors and statistical methods such as hierarchical cluster analysis and Pearson's correlation study with the aim of investigating the plant capabilities for their uptake from the soil and later accumulation into the root tissue, under the hostile circumstances of multiple contamination...
May 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28521165/alteration-of-trace-element-concentrations-in-plants-by-adhering-particles-methods-of-correction
#3
Solveig Pospiech, Wiebke Fahlbusch, Benedikt Sauer, Tino Pasold, Hans Ruppert
Trace element concentrations in plants may be influenced by airborne dust or adhering soil particles. Neglecting adhering particles in plant tissue leads to misinterpretation of trace element concentrations in research fields such as phytomining, phytoremediation, bio-monitoring, uptake of micronutrients and provenance studies. In case washing or brushing the samples prior to analysis is insufficient or impossible due to fragile or pre-processed samples mathematical correction should be applied. In this study three methods are presented allowing to subtract the influence of adhering particles in order to obtain the element concentrations in plants resulting only from uptake...
May 10, 2017: Chemosphere
https://www.readbyqxmd.com/read/28520473/a-new-method-and-mass-spectrometric-instrument-for-extraterrestrial-microbial-life-detection-using-the-elemental-composition-analyses-of-martian-regolith-and-permafrost-ice
#4
G G Managadze, A A Safronova, K A Luchnikov, E A Vorobyova, N S Duxbury, P Wurz, N G Managadze, A E Chumikov, R Kh Khamizov
We propose a new technique for the detection of microorganisms by elemental composition analyses of a sample extracted from regolith, permafrost, and ice of extraterrestrial bodies. We also describe the design of the ABIMAS instrument, which consists of the onboard time-of-flight laser mass-reflectron (TOF LMR) and the sample preparation unit (SPU) for biomass extraction. This instrument was initially approved to fly on board the ExoMars 2020 lander mission. The instrument can be used to analyze the elemental composition of possible extraterrestrial microbial communities and compare it to that of terrestrial microorganisms...
May 2017: Astrobiology
https://www.readbyqxmd.com/read/28516483/capabilities-and-limitations-of-dgge-for-the-analysis-of-hydrocarbonoclastic-prokaryotic-communities-directly-in-environmental-samples
#5
Dina M Al-Mailem, Mayada K Kansour, Samir S Radwan
Prokaryotic communities in pristine and oil-contaminated desert soil, seawater, and hypersaline coastal soil were analyzed using culture-dependent and culture-independent approaches. The former technique was the dilution-plating method. For the latter, total genomic DNA was extracted and the 16S rRNA genes were amplified using a universal bacterial primer pair and primer pairs specific for Actinobacteria, Gammaproteobacteria, and Archaea. The amplicons were resolved using denaturing gradient gel electrophoresis (DGGE) and sequenced, and the sequences were compared to those in GenBank...
May 18, 2017: MicrobiologyOpen
https://www.readbyqxmd.com/read/28516055/antimicrobial-and-enzymatic-activity-of-actinomycetes-isolated-from-soils-of-coastal-islands
#6
Ivana Charousová, Juraj Medo, Eva Halenárová, Soňa Javoreková
Microbiological investigation of unexplored ecosystems is crucial for discovering of antibiotic producing actinomycetes. The present study was conducted to determine antimicrobial activity and identify the most active strains. Actinomycetes were isolated using the spread plate technique following by serial dilution of samples on starch casein agar. The screening method consists of primary and secondary testing. The most active isolates were identified based on molecular and cultural methods. 42 out of 66 isolates displayed antimicrobial potential...
April 2017: Journal of Advanced Pharmaceutical Technology & Research
https://www.readbyqxmd.com/read/28512705/predicting-fecal-coliform-using-the-interval-to-interval-approach-and-swat-in-the-miyun-watershed-china
#7
Jianwen Bai, Zhenyao Shen, Tiezhu Yan, Jiali Qiu, Yangyang Li
Pathogens in manure can cause waterborne-disease outbreaks, serious illness, and even death in humans. Therefore, information about the transformation and transport of bacteria is crucial for determining their source. In this study, the Soil and Water Assessment Tool (SWAT) was applied to simulate fecal coliform bacteria load in the Miyun Reservoir watershed, China. The data for the fecal coliform were obtained at three sampling sites, Chenying (CY), Gubeikou (GBK), and Xiahui (XH). The calibration processes of the fecal coliform were conducted using the CY and GBK sites, and validation was conducted at the XH site...
May 16, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28512371/first-report-of-the-spiral-nematode-helicotylenchus-microlobus-infecting-soybean-in-north-dakota
#8
Guiping Yan, Addison Plaisance, Danqiong Huang, Zafar A Handoo
Spiral nematodes (Helicotylenchus spp.) are common plant-parasitic nematodes in fields of many crops. In June 2015, two soil samples were collected from a soybean field in Richland County, ND. Nematodes were extracted from soil using the sugar centrifugal flotation method (Jenkins, 1964). Plant-parasitic nematodes were identified to genus based on morphological features and counted. Both samples contained spiral nematodes from 1,500 to 3,300 per kilogram of soil. In June and August 2016, 10 soil samples were collected from the same field...
March 2017: Journal of Nematology
https://www.readbyqxmd.com/read/28511353/assessment-of-water-retention-function-as-tool-to-improve-integrated-watershed-management-case-study-of-poprad-river-basin-slovakia
#9
Barbora Šatalová, Pavol Kenderessy
The presented study concentrates on assessing the ecosystem function of water retention. The water retention function is defined as the ability of the landscape to retain water, slow runoff and encourage water infiltration. The water retention function was expressed by calculating the hydric significance (HS) indicator. This method is based on scoring the individual input parameters according to their overall impact on watershed hydrology. The study was conducted on a sample area of Poprad River basin. The final results presented a spatial distribution of hydric function within the watershed classified according to its significance into four classes (from limited to excellent significance)...
May 12, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28508163/development-of-molecular-diagnostic-protocols-for-detecting-three-types-of-entamoeba-from-diarrheal-and-asymptomatic-pigs-and-environmental-moist-soils
#10
Yoshimasa Hirashima, Tilusha Manchanayake, Takahisa Yano, Syoei Kitahara, Terunori Koreeda, Syunsuke Kamimura, Kazumi Sasai, Makoto Matsubayashi, Tomoyuki Shibahara
Entamoeba suis and Entamoeba polecki subtypes (ST) 1 and 3 have recently been implicated in disease outbreaks in pigs. However, the distributions of these parasites in Japan and the potential sources of infection on farms still remain unclear. Here, we examined a farm of fattening/growing pigs with abnormal feces in Kagoshima Prefecture, Japan, and found the presence of parasites in the farm environment. Examination of intestinal tissues from pigs presenting with ulcerative colitis revealed a large number of trophozoites that had invaded the lesions...
May 15, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28507763/investigation-of-cloud-point-extraction-for-the-analysis-of-metallic-nanoparticles-in-a-soil-matrix
#11
Hind El Hadri, Vincent A Hackley
The characterization of manufactured nanoparticles (MNPs) in environmental samples is necessary to assess their behavior, fate and potential toxicity. Several techniques are available, but the limit of detection (LOD) is often too high for environmentally relevant concentrations. Therefore, pre-concentration of MNPs is an important component in the sample preparation step, in order to apply analytical tools with a LOD higher than the ng kg(-1) level. The objective of this study was to explore cloud point extraction (CPE) as a viable method to pre-concentrate gold nanoparticles (AuNPs), as a model MNP, spiked into a soil extract matrix...
2017: Environmental Science. Nano
https://www.readbyqxmd.com/read/28507618/correlation-between-soil-transmitted-helminth-infection-and-eosinophil-levels-among-primary-school-children-in-medan
#12
Dewi Masyithah Darlan, Zaimah Z Tala, Cellya Amanta, Syah Mirsya Warli, Nurfida K Arrasyid
BACKGROUND: Soil Transmitted Helminth infection is one of most prevalent health problems worldwide, especially in environments with poor sanitation. Based on World Health Organisation (WHO) data, more than 2 billion people, or 24% of the world's population, are infected with intestinal parasite. The highest prevalence is located in areas of poor sanitation and unsafe water supplies. In Indonesia, the prevalence of parasite infections is 15% of the entire population. AIM: The purpose of this study was to determine the relationship between Soil Transmitted Helminth infection on levels of eosinophils among primary school children...
April 15, 2017: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/28507613/correlation-between-soil-transmitted-helminths-infection-and-serum-iron-level-among-primary-school-children-in-medan
#13
Nurfida K Arrasyid, Monica Nadya Sinambela, Zaimah Z Tala, Dewi Masyithah Darlan, Syah Mirsya Warli
BACKGROUND: The latest estimates indicate that more than 2 billion people worldwide are infected by Soil-Transmitted Helminths (STH). The burden of STH infection is mainly attributed to the chronic effect on health and quality of life of those infected. It is also contributed to micronutrient deficiencies such as iron-deficiency anaemia. The prevalence of worm infection in Public Primary School students in Medan was quite high (40.3%), and 33.3% was anaemic in the latest study. AIM: To determine the correlation between STH infection with serum iron (SI) level on primary school children, as well as to determine the prevalence of SI level and worm infection, and the type of worm that infects the most of them...
April 15, 2017: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/28506057/liquid-spray-dielectric-barrier-discharge-induced-plasma-chemical-vapor-generation-for-the-determination-of-lead-by-icp-ms
#14
Xing Liu, Zhenli Zhu, Huilai Li, Dong He, Yatai Li, Hongtao Zheng, Yiqun Gan, Yanxiang Li, Nicholas Stanley Belshaw, Shenghong Hu
In the present study, a novel and sensitive liquid spray dielectric barrier discharge induced plasma-chemical vapor generation technique (LSDBD-CVG) is developed for the determination of lead concentration by inductively coupled plasma mass spectrometry (ICP-MS). The dissolved Pb(2+) is readily converted to volatile species by LSDBD plasma induced chemical processes in the presence of 5% (v/v) formic acid in a supporting electrolyte (HCl, 0.01 mol L(-1)). In this LSDBD approach, the sample solution is converted to aerosol and simultaneously mixed with the DBD plasma generated at the nozzle of a pneumatic nebulizer, which greatly facilitates Pb vapor generation because of the enhanced interaction of sprayed analytes and the plasma...
May 16, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28501640/rapid-immobilization-of-simulated-radioactive-soil-waste-by-microwave-sintering
#15
Shuai Zhang, Xiaoyan Shu, Shunzhang Chen, Huimin Yang, Chenxi Hou, Xueli Mao, Fangting Chi, Mianxin Song, Xirui Lu
A rapid and efficient method is particularly necessary in the timely disposal of seriously radioactive contaminated soil. In this paper, a series of simulated radioactive soil waste containing different contents of neodymium oxide (3-25wt.%) has been successfully vitrified by microwave sintering at 1300°C for 30min. The microstructures, morphology, element distribution, density and chemical durability of as obtained vitrified forms have been analyzed. The results show that the amorphous structure, homogeneous element distribution, and regular density improvement are well kept, except slight cracks emerge on the magnified surface for the 25wt...
May 3, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28499232/co-application-of-sewage-sludge-with-biochar-increases-disappearance-of-polycyclic-aromatic-hydrocarbons-from-fertilized-soil-in-long-term-field-experiment
#16
Magdalena Stefaniuk, Patryk Oleszczuk, Krzysztof Różyło
The application of sewage sludge with biochar as fertilizer may be a new method improves soil properties. Biochar increases of the crops productivity and reduction of bioavailability of contaminants. In the present study the persistence of sum of 16 (Σ16) PAHs (US EPA 16 PAHs) in a sewage sludge-amended soil (11t/h) and in a sewage sludge-amended soil with the addition of biochar (at a rate of 2.5, 5 or 10% of sewage sludge (dry weight basis)) was determined. This study was carried out as a plot experiment over a period of 18months...
May 9, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28496065/solid-sampling-in-analysis-of-soils-by-two-jet-plasma-atomic-emission-spectrometry
#17
Natalia P Zaksas, Alexander F Veryaskin
The possibility of direct analysis of soils by two-jet plasma atomic emission spectrometry was investigated using certified reference materials of black earth, grey desert and red soils. It was shown that As, B, Cd, Cu, Hg, P, and V could be determined after a 2-fold, and Be, Co, Cr, Ga, Nb, Pb, and Zn-after a 10-fold dilution of the samples by a spectroscopic buffer using calibration samples based on graphite powder. The strongest matrix effects were revealed for red soil having the highest Al and Fe concentration, which led to the overstated concentrations of some elements...
2017: Analytical Sciences: the International Journal of the Japan Society for Analytical Chemistry
https://www.readbyqxmd.com/read/28495096/sequential-extraction-protocol-for-organic-matter-from-soils-and-sediments-using-high-resolution-mass-spectrometry
#18
Malak M Tfaily, Rosalie K Chu, Jason Toyoda, Nikola Tolić, Errol W Robinson, Ljiljana Paša-Tolić, Nancy J Hess
A vast number of organic compounds are present in soil organic matter (SOM) and play an important role in the terrestrial carbon cycle, facilitate interactions between organisms, and represent a sink for atmospheric CO2. The diversity of different SOM compounds and their molecular characteristics is a function of the organic source material and biogeochemical history. By understanding how SOM composition changes with sources and the processes by which it is biogeochemically altered in different terrestrial ecosystems, it may be possible to predict nutrient and carbon cycling, response to system perturbations, and impact of climate change will have on SOM composition...
June 15, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28494478/survival-of-legionella-in-earthquake-induced-soil-disturbance-liquefaction-in-residential-areas-christchurch-new-zealand-implications-for-disease
#19
Frances F Graham, David Jg Harte
AIM: To investigate a possible link between liquefaction dust exposure and the noticeable increase in legionellosis cases in response to major earthquakes in 2010 and 2011 that resulted in widespread soil disturbance (liquefaction) in parts of Christchurch, New Zealand. METHOD: We culture tested liquefaction-affected soil for Legionella spp. in the six months following the first earthquake in 2010. Thirty silt samples were collected randomly from locations within Christchurch's metropolitan area that were affected by liquefaction...
May 12, 2017: New Zealand Medical Journal
https://www.readbyqxmd.com/read/28492480/detection-of-soil-nitrogen-using-near-infrared-sensors-based-on-soil-pretreatment-and-algorithms
#20
Pengcheng Nie, Tao Dong, Yong He, Fangfang Qu
Soil nitrogen content is one of the important growth nutrient parameters of crops. It is a prerequisite for scientific fertilization to accurately grasp soil nutrient information in precision agriculture. The information about nutrients such as nitrogen in the soil can be obtained quickly by using a near-infrared sensor. The data can be analyzed in the detection process, which is nondestructive and non-polluting. In order to investigate the effect of soil pretreatment on nitrogen content by near infrared sensor, 16 nitrogen concentrations were mixed with soil and the soil samples were divided into three groups with different pretreatment...
May 11, 2017: Sensors
keyword
keyword
57824
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"