Preparation and characterization of new reagent derivative of thiazol azo for spectral evaluation of some metal elements in different samples using cloud point technique

The characterization of manufactured nanoparticles (MNPs) in environmental samples is necessary to assess their behavior, fate and potential toxicity.

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Development and Characterization of Modular Ceramic and Metal Elements in Vertical Gardens and Ventilated Façades in Buildings

Lecture Notes in Management and Industrial Engineering - Project Management and Engineering Research ◽

10.1007/978-3-319-92273-7_13 ◽

2018 ◽

pp. 189-202

Author(s):

V. Pérez-Andreu ◽

C. Aparicio-Fernández ◽

F. Castilla ◽

J.-L. Vivancos

Keyword(s):

Metal Elements

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The Detection and Characterization of Nanoparticulate Heavy Metals in Epithelial Tissues in Patients with Nephrogenic Fibrosing Dermopathy

MRS Proceedings ◽

10.1557/proc-1063-oo10-06 ◽

2007 ◽

Vol 1063 ◽

Cited By ~ 1

Author(s):

Reed Ayers ◽

Whitney High ◽

John Chandler ◽

Jim Ranville

Keyword(s):

Metallic Nanoparticles ◽

Cell Structure ◽

Contrast Material ◽

Paramagnetic Contrast Agent ◽

Thin Sections ◽

Metal Elements ◽

Icp Ms ◽

Number Of Patients ◽

Nephrogenic Fibrosing Dermopathy

ABSTRACTCertain diseases have been associated with the administration of heavy elements as contrast agents to patients undergoing medical imaging procedures. Recently, the presence of gadolinium (Gd) administered as a paramagnetic contrast agent for MRI contrast studies was associated with the incidence of Nephrogenic Fibrosing Dermopathy (NFD), also called Nephrogenic Systemic Fibrosis (NSF). To determine specific causation, Gd and other metallic nanoparticles in various tissues must be detected directly and characterized in-situ. This is done to develop specific mechanisms for the chemical modification of the metal elements as the result of a biologic response. Fixed biopsies embedded in paraffin were sectioned at 3-5 μm thick, deparaffinized by hand (xylene and 100% ethyl alcohol), placed on carbon planchettes, and allowed to air dry. Deparaffinized tissues were examined using a field emission SEM (FE-SEM) to directly detect and image the presence of Gd as well as other metals. Backscatter electron (BSE) imaging (20kV) was used to discern metal particles within tissues. Energy dispersive spectroscopy (EDS) (15kV) was used to verify the specific elements present. This allowed for the spatial characterization of the nanoparticles within the tissues but due to the physical limitations of SEM/EDS, quantification of the amount of metal was not possible. Mass concentration of the metal elements was determined using inductively coupled plasma mass spectrometry (ICP-MS) on digested tissues. Thick tissue sections, >30 μm, were used for ICP-MS to provide enough mass for detection. These sections were taken from the histology blocks adjacent to the thin sections used in the FE-SEM. Gadolinium was detected in skin, heart, lung and liver tissues. The highest concentrations were found in heart and skin; both had average tissue concentrations greater than 200μg/g (100-450μg/g range). In skin, gadolinium nano-particulates were readily seen near cell body locations in autopsy samples and within the cells in biopsy samples. The cells where gadolinium was most easily found were along blood vessels. In the cells the agglomerates appear granular with a size of less than 100 nm. They are diffused throughout the cell but as of this time not associated with any particular cell structure. Subsequent work using TEM will examine that aspect as well as the specific ultrastructure and chemistry of the nanoparticles. In this investigation, gadolinium was detected in the tissues of a number of patients with NSF. Although neither dispositive of a pathophysiologic mechanism, nor proof of causation, the detection and quantification of gadolinium within tissues of NSF patients is supportive of the epidemiologic association between exposure to gadolinium containing contrast material and development of the disease.

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The Study about Microstructure Characterization of AlCoCrTiNiCu_x High Entropy Alloy System with Multi-Principal Element

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.399-401.3 ◽

2011 ◽

Vol 399-401 ◽

pp. 3-7 ◽

Cited By ~ 2

Author(s):

Chun Wei Wang ◽

Zhuo Qiang Mo ◽

Jian Jiang Tang

Keyword(s):

Crystal Structure ◽

Transition Metal ◽

Change Process ◽

Phase Structure ◽

Alloy System ◽

High Entropy Alloy ◽

Principal Element ◽

High Entropy ◽

Metal Elements

The microstructure and phase structure of AlCoCrTiNiCu_x which are made of six class transition metal elements have been studied in this paper. The results indicated that the change process of microcosmic crystal-structure of the five group high entropy alloy of AlCoCrTiNiCu_x system is transformed from FCC（mainly）+ BCC crystal structure (X=0.5、X=0.8) to FCC+BCC+ primary lattice crystal structure (X=1.0、X=1.2), finally, the crystal-structure turn into BCC+ primary lattice crystal structure as the content of Cu further increasing.

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Relationship between the characterization of natural colloids and metal elements in surface waters

Environmental Science and Pollution Research ◽

10.1007/s11356-020-09500-x ◽

2020 ◽

Vol 27 (25) ◽

pp. 31872-31883

Author(s):

Caixia Yan ◽

Yanru Sheng ◽

Min Ju ◽

Cong Ding ◽

Qian Li ◽

...

Keyword(s):

Surface Waters ◽

Metal Elements

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PRELIMINARY PHYTOCHEMICAL EVALUATION AND SPECTRAL CHARACTERIZATION OF ACTIVE CONSTITUENTS IN THE DRIED EXTRACTS OF THE WHOLE PLANT ARGYREIA IMBRICATA (ROX) SANT AND PATEL

Asian Journal of Pharmaceutical and Clinical Research ◽

10.22159/ajpcr.2019.v12i11.35464 ◽

2019 ◽

pp. 56-60

Author(s):

SEBASTIN V ◽

GOPALAKRISHNAN G ◽

SREEJITH M ◽

ANOOB KUMAR KI

Keyword(s):

Column Chromatography ◽

Spectral Characterization ◽

Whole Plant ◽

Soxhlet Apparatus ◽

Spectral Evaluation ◽

Pharmacological Screening ◽

Dried Extract ◽

Layer Chromatography ◽

Tlc Separation

Objective: The present study was designed with the aim of preliminary phytochemical evaluation and spectral characterization phytochemicals present in the extracts of whole plant Argyreia imbricata (Rox) Sant and Patel. Methods: The whole plant A. imbricata was collected, authenticated, and dried in the shade for powdering in mechanical grinder. The powdered plant material was extracted with Soxhlet apparatus using different solvents, and the dried extract obtained was subjected to preliminary phytochemical evaluation, and then column chromatography separation and the separated fractions were subjected to thin-layer chromatography (TLC) separation. Based on the yield in TLC, the selected compounds were subjected to carbon-13 nuclear magnetic resonance, proton NMR (1H NMR), and mass spectroscopic evaluation. Results: In the preliminary phytochemical evaluation, the presence of alkaloids, glycosides, phenolic compounds, flavonoids, carbohydrates, saponins, sterols, and terpenoids was found in different extracts. In column chromatography separation, totally 650 fractions were collected, and four compounds were isolated with the help of TLC. Among the four, two compounds were selected for spectral evaluation based on the yield obtained. The selected compounds were identified and named as, 3-ethyl-5-(hydroxymethyl) phenol and methyl 4-hydroxybenzoate with the help of spectral evaluation. Conclusion: The outcome of this study is beneficial, and further investigation in the future directed toward the detailed pharmacological screening of the extracts may give more valuable results.

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