Biological and environmental media control oxide nanoparticle surface composition: the roles of biological components (proteins and amino acids), inorganic oxyanions and humic acid

2015 ◽  
Vol 2 (5) ◽  
pp. 429-439 ◽  
Author(s):  
Imali A. Mudunkotuwa ◽  
Vicki H. Grassian
Keyword(s):  
Amino Acids ◽  
Humic Acid ◽  
Surface Composition ◽  
Environmental Matrices ◽  
Environmental Media ◽  
Media Control ◽  
Nanoparticle Surface ◽  
Oxide Nanoparticle

Evolution of nanoparticle surface composition in increasingly complex biological and environmental matrices.

Comparative Adsorption of Phenanthrene, Bisphenol A, and Sulfamethoxazole on Humic Acid-Iron Oxide Nanoparticle Complexes

2015 ◽  
Vol 32 (8) ◽  
pp. 703-712 ◽  
Author(s):  
Ni Liang ◽  
Di Zhang ◽  
Chaoxian Wei ◽  
Hao Li ◽  
Saikat Ghosh ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Humic Acid ◽  
Bisphenol A ◽  
Iron Oxide Nanoparticle ◽  
Oxide Nanoparticle

scholarly journals Recent advances in analysis of trace elements in environmental samples by X-ray based techniques (IUPAC Technical Report)

2019 ◽  
Vol 91 (6) ◽  
pp. 1029-1063 ◽  
Author(s):  
Roberto Terzano ◽  
Melissa A. Denecke ◽  
Gerald Falkenberg ◽  
Bradley Miller ◽  
David Paterson ◽  
...  
Keyword(s):  
Trace Elements ◽  
Environmental Samples ◽  
Analytical Techniques ◽  
Anthropogenic Pollution ◽  
Chemical Extraction ◽  
Environmental Matrices ◽  
Environmental Sciences ◽  
X Ray ◽  
Environmental Media ◽  
Living Organisms

Abstract Trace elements analysis is a fundamental challenge in environmental sciences. Scientists measure trace elements in environmental media in order to assess the quality and safety of ecosystems and to quantify the burden of anthropogenic pollution. Among the available analytical techniques, X-ray based methods are particularly powerful, as they can quantify trace elements in situ. Chemical extraction is not required, as is the case for many other analytical techniques. In the last few years, the potential for X-ray techniques to be applied in the environmental sciences has dramatically increased due to developments in laboratory instruments and synchrotron radiation facilities with improved sensitivity and spatial resolution. In this report, we summarize the principles of the X-ray based analytical techniques most frequently employed to study trace elements in environmental samples. We report on the most recent developments in laboratory and synchrotron techniques, as well as advances in instrumentation, with a special attention on X-ray sources, detectors, and optics. Lastly, we inform readers on recent applications of X-ray based analysis to different environmental matrices, such as soil, sediments, waters, wastes, living organisms, geological samples, and atmospheric particulate, and we report examples of sample preparation.

Observing the colloidal stability of iron oxide nanoparticlesin situ

Nanoscale ◽  
2019 ◽  
Vol 11 (27) ◽  
pp. 13098-13107 ◽  
Author(s):  
Ryan Hufschmid ◽  
Eric Teeman ◽  
B. Layla Mehdi ◽  
Kannan M. Krishnan ◽  
Nigel D. Browning
Keyword(s):  
Iron Oxide ◽  
Scanning Transmission Electron Microscopy ◽  
Colloidal Stability ◽  
Iron Oxide Nanoparticle ◽  
Nanoparticle Surface ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Liquid Cell ◽  
Oxide Nanoparticle

Iron oxide nanoparticle surface chemistry controls growth and dissolution, which are observed in real-time usingin situliquid cell Scanning Transmission Electron Microscopy (STEM).

Understanding iridium oxide nanoparticle surface sites by their interaction with catechol

2017 ◽  
Vol 19 (24) ◽  
pp. 16151-16158 ◽  
Author(s):  
Daniel Finkelstein-Shapiro ◽  
Maxime Fournier ◽  
Dalvin D. Méndez-Hernández ◽  
Chengchen Guo ◽  
Monica Calatayud ◽  
...  
Keyword(s):  
Catalytic Properties ◽  
Iridium Oxide ◽  
Surface Sites ◽  
Nanoparticle Surface ◽  
Oxide Nanoparticle

We report the first method to quantitatively understand the optical and catalytic properties of IrOx nanoparticles.

scholarly journals The AMS Dating of Separate Fractions in Archaeology

Radiocarbon ◽  
1986 ◽  
Vol 28 (2A) ◽  
pp. 698-701 ◽  
Author(s):  
R J Batten ◽  
Richard Gillespie ◽  
J A J Gowlett ◽  
Rem Hedges
Keyword(s):  
Amino Acids ◽  
Molecular Weight ◽  
Humic Acid ◽  
Carbon Source ◽  
High Molecular Weight ◽  
Complex Mixture ◽  
Small Samples ◽  
Radiocarbon Dates ◽  
Ams Dating ◽  
Relationship Of

The usefulness of radiocarbon dates in archaeology greatly depends on both the stratigraphic relationship of the sample submitted and on the origin and homogeneity of the measured carbon. For very small samples, stratigraphic relationships can raise additional problems of movement. In chemically well-characterized materials, the best example being collagen, the carbon source can be reasonably well purified. Many samples, however, survive as a complex mixture of high molecular weight polyphenolic materials, with properties between charcoals, humic acids, and lignins. Charred bone, eg, which rarely contains useful quantities of amino acids, and charred seeds, as well as ‘charcoal,’ frequently come into this category. For such samples, the likelihood of contamination by percolating soil humics is high. It is often possible to extract chemically different fractions and to compare the dates obtained. A less exact comparison can also be made for different samples from the same context. The results suggest that ‘humic’ acid dates can be reliable in a surprisingly frequent number of situations, and that where direct comparison is possible, the reliability can be individually assessed.

scholarly journals Effects of Iron-Oxide Nanoparticle Surface Chemistry on Uptake Kinetics and Cytotoxicity in CHO-K1 Cells

2015 ◽  
Vol 17 (1) ◽  
pp. 54 ◽  
Author(s):  
Camille Hanot ◽  
Young Choi ◽  
Tareq Anani ◽  
Dharsan Soundarrajan ◽  
Allan David
Keyword(s):  
Iron Oxide ◽  
Surface Chemistry ◽  
Uptake Kinetics ◽  
Iron Oxide Nanoparticle ◽  
Nanoparticle Surface ◽  
Oxide Nanoparticle

Humic acid reactions with amino acids

1974 ◽  
Vol 6 (6) ◽  
pp. 401-407 ◽  
Author(s):  
M. Schnitzer ◽  
F.J. Sowden ◽  
K.C. Ivarson
Keyword(s):  
Amino Acids ◽  
Humic Acid
Sign in / Sign up

Export Citation Format

Share Document