scholarly journals Sample preparation strategies for petroleum coke digestion and further cerium and lanthanum determination by DSN-ICP-OES

2018 ◽  
Vol 33 (8) ◽  
pp. 1284-1291 ◽  
Author(s):  
J. P. Souza ◽  
K. Kellermann ◽  
M. S. Camargo ◽  
D. P. Moraes ◽  
D. Pozebon ◽  
...  
Keyword(s):  
Sample Preparation ◽  
Petroleum Coke ◽  
Icp Oes ◽  
First Time

Digestion of petroleum coke is proposed for the first time by MW-AD and MIC for La and Ce determination by DSN-ICP-OES.

scholarly journals Identification of arbuscular mycorrhizal fungi in soils of the North Caucasus based on Illumina MiSeq data for ITS1 and ITS2 regions

2020 ◽  
Vol 23 ◽  
pp. 02013
Author(s):  
Andrey P. Yurkov ◽  
Alexey A. Kryukov ◽  
Anastasia O. Gorbunova ◽  
Andrey V. Shcherbakov ◽  
Peter M. Zhurbenko
Keyword(s):  
Sample Preparation ◽  
Arbuscular Mycorrhizal Fungi ◽  
Mycorrhizal Fungi ◽  
Arbuscular Mycorrhizal ◽  
Illumina Miseq ◽  
North Caucasus ◽  
Operational Taxonomic Units ◽  
The North ◽  
First Time ◽  
Its1 And Its2

The objective of our research was to analyze the efficiency of identification of arbuscular mycorrhizal fungi (AMF) for 2 regions: ITS1 and ITS2 regions of AMF DNA isolated from the soils of the North Caucasus (Karachay-Cherkessia). For the first time the necessity of different AMF species identification using both ITS regions was revealed, but not one region. The research demonstrated: 1) the set of taxa is different using ITS1- and ITS2-based identification; 2) analysis of the ITS1 region reveals a greater number of operational taxonomic units; 3) ITS2 allows identification of AMF at the species level more often. Sample preparation for Illumina MiSeq analysis was optimized. Obligatory stages in the sample preparation were the purification of DNA in the agarose gel in Silica after isolation, as well as separate amplification of ITS1 and ITS2 followed by combining and joint sequencing for each sample. The results showed the highest AMF biodiversity for the 176Te sample from the ecosystem of the subalpine meadow of the southeastern slope of Malaya Hatipara mountain (43°25′48.0″N 41°42′31.0″E; 2401 m above sea level), in which 8 species of AMF were identified (Archaeospora spainiae, Claroideoglomus claroideum, Diversispora versiformis, Entrophpora infrequens, Funneliformis mosseae, Glomus indicum, Paraglomus laccatum, Rhizophagus irregularis).

Microwave-assisted ultraviolet digestion: an efficient method for the digestion of produced water from crude oil extraction and further metal determination

2017 ◽  
Vol 32 (12) ◽  
pp. 2439-2446 ◽  
Author(s):  
J. P. Souza ◽  
P. S. Barela ◽  
K. Kellermann ◽  
M. F. P. Santos ◽  
D. P. Moraes ◽  
...  
Keyword(s):  
Ultraviolet Radiation ◽  
Crude Oil ◽  
Efficient Method ◽  
Produced Water ◽  
Oil Extraction ◽  
Icp Oes ◽  
Metal Determination ◽  
Microwave Assisted ◽  
First Time

Microwave coupled to ultraviolet radiation is proposed for the first time for produced water digestion allowing metal determination by ICP-OES.

Evaluation of Electrospray as a Sample Preparation Tool for Electron Microscopic Investigations: Toward Quantitative Evaluation of Nanoparticles

2017 ◽  
Vol 23 (1) ◽  
pp. 163-172 ◽  
Author(s):  
Johannes Mielke ◽  
Pavla Dohányosová ◽  
Philipp Müller ◽  
Silvia López-Vidal ◽  
Vasile-Dan Hodoroaba
Keyword(s):  
Sample Preparation ◽  
Deposition Efficiency ◽  
Number Concentration ◽  
Spherical Particles ◽  
Electron Microscopic ◽  
Electron Microscopes ◽  
Controlled Preparation ◽  
First Time ◽  
Preparation Techniques ◽  
Sample Carrier

AbstractThe potential of electrospray deposition, for the controlled preparation of particles for imaging in electron microscopes, is evaluated on various materials: from mono-modal suspensions of spherical particles to multimodal suspensions and to real-world industrial materials. It is shown that agglomeration is reduced substantially on the sample carrier, compared with conventional sample preparation techniques. For the first time, it is possible to assess the number concentration of a tri-modal polystyrene suspension by electron microscopy, due to the high deposition efficiency of the electrospray. We discovered that some suspension stabilizing surfactants form artifact particles during electrospraying. These can be avoided by optimizing the sprayed suspension.

Orthoamide und Iminiumsalze, XCI. N,N′,N″-Peralkylierte Guanidiniumsalze – Ionische Flüssigkeiten als Hilfsmittel in der Elektronenmikroskopie

2016 ◽  
Vol 71 (6) ◽  
pp. 719-735
Author(s):  
Georg Knobloch ◽  
Stefan Saur ◽  
Anja Rebecca Gentner ◽  
Stefan Tussetschläger ◽  
Thorsten Stein ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Sample Preparation ◽  
Cell Cultures ◽  
Inorganic Materials ◽  
Cellulose Fibres ◽  
Coated Materials ◽  
Ionische Flüssigkeiten ◽  
First Time ◽  
Scanning Electron

AbstractPolymeric organic materials, e.g. cellulose fibres or nylon 6 (perlon), as well as inorganic materials, e.g. ceramics, can be coated with liquid or solid guanidinium salts. The coated materials can be inspected by scanning electron microscopy (SEM). The contrast and brightness of the pictures depend on the heaviest atom present in the anions. The best brightness and contrast were obtained with N,N′,N″-peralkylated guanidinium tetraiodidobismutates(III), which were prepared for the first time together with other guanidinium chloridometallates (Sb, Pb, Bi). Biological samples (cell cultures) can also be investigated by SEM with the aid of the guanidinium tetrachloridobismutate 4b after simple sample preparation.

Artificial neural network employment for element determination in Mugil cephalus by ICP OES in Pontal Bay, Brazil

2020 ◽  
Vol 12 (29) ◽  
pp. 3713-3721
Author(s):  
Milana Aboboreira Simões Batista ◽  
Luana Novaes Santos ◽  
Bruna Cirineu Chagas ◽  
Ivon Pinheiro Lôbo ◽  
Cleber Galvão Novaes ◽  
...  
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Sample Preparation ◽  
Chemical Elements ◽  
Mixture Design ◽  
Mugil Cephalus ◽  
Self Organizing Map ◽  
Icp Oes ◽  
Element Determination ◽  
Artificial Neural

Mixture design applied to sample preparation of Mugil cephalus and exploratory evaluation of the concentrations of chemical elements using Kohonen Self-Organizing Map (KSOM) combined with Artificial Neural Network (ANNs).

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