Data set showing the development of a hyperspectral imaging technique using LA-ICP-MS to determine the spatial distribution of nutrients in soil cores

Any real world object is three-dimensional. The principle of tomography, which reconstructs the 3-D structure of an object from its 2-D projections of different view angles has found application in many disciplines. Electron Microscopic (EM) tomography on non-ordered structures (e.g., subcellular structures in biology and non-crystalline structures in material science) has been exercised sporadically in the last twenty years or so. As vital as is the 3-D structural information and with no existing alternative 3-D imaging technique to compete in its high resolution range, the technique to date remains the kingdom of a brave few. Its tedious tasks have been preventing it from being a routine tool. One keyword in promoting its popularity is automation: The data collection has been automated in our lab, which can routinely yield a data set of over 100 projections in the matter of a few hours. Now the image processing part is also automated. Such automations finish the job easier, faster and better.

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Do galactic bars depend on environment?: an information theoretic analysis of Galaxy Zoo 2

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/staa3665 ◽

2020 ◽

Vol 501 (1) ◽

pp. 994-1001

Author(s):

Suman Sarkar ◽

Biswajit Pandey ◽

Snehasish Bhattacharjee

Keyword(s):

Spatial Distribution ◽

Mutual Information ◽

Local Density ◽

Statistical Significance ◽

Distribution Functions ◽

Cumulative Distribution ◽

Host Galaxy ◽

Data Sets ◽

Data Set ◽

Information Theoretic

ABSTRACT We use an information theoretic framework to analyse data from the Galaxy Zoo 2 project and study if there are any statistically significant correlations between the presence of bars in spiral galaxies and their environment. We measure the mutual information between the barredness of galaxies and their environments in a volume limited sample (Mr ≤ −21) and compare it with the same in data sets where (i) the bar/unbar classifications are randomized and (ii) the spatial distribution of galaxies are shuffled on different length scales. We assess the statistical significance of the differences in the mutual information using a t-test and find that both randomization of morphological classifications and shuffling of spatial distribution do not alter the mutual information in a statistically significant way. The non-zero mutual information between the barredness and environment arises due to the finite and discrete nature of the data set that can be entirely explained by mock Poisson distributions. We also separately compare the cumulative distribution functions of the barred and unbarred galaxies as a function of their local density. Using a Kolmogorov–Smirnov test, we find that the null hypothesis cannot be rejected even at $75{{\ \rm per\ cent}}$ confidence level. Our analysis indicates that environments do not play a significant role in the formation of a bar, which is largely determined by the internal processes of the host galaxy.

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Quantitative Determination of the Surface Distribution of Supported Metal Nanoparticles: A Laser Ablation–ICP–MS Based Approach

Chemosensors ◽

10.3390/chemosensors9040077 ◽

2021 ◽

Vol 9 (4) ◽

pp. 77

Author(s):

Davide Spanu ◽

Gilberto Binda ◽

Marcello Marelli ◽

Laura Rampazzi ◽

Sandro Recchia ◽

...

Keyword(s):

Spatial Distribution ◽

Laser Ablation ◽

Quantitative Determination ◽

Metal Nanoparticles ◽

Total Mass ◽

Functional Materials ◽

Metal Extraction ◽

Ms Analysis ◽

Icp Ms

A laser ablation–inductively coupled plasma–mass spectrometry (LA–ICP–MS) based method is proposed for the quantitative determination of the spatial distribution of metal nanoparticles (NPs) supported on planar substrates. The surface is sampled using tailored ablation patterns and the data are used to define three-dimensional functions describing the spatial distribution of NPs. The volume integrals of such interpolated surfaces are calibrated to obtain the mass distribution of Ag NPs by correlation with the total mass of metal as determined by metal extraction and ICP–MS analysis. Once this mass calibration is carried out on a sacrificial sample, quantifications can be performed over multiple samples by a simple micro-destructive LA–ICP–MS analysis without requiring the extraction/dissolution of metal NPs. The proposed approach is here tested using a model sample consisting of a low-density polyethylene (LDPE) disk decorated with silver NPs, achieving high spatial resolution over cm2-sized samples and very high sensitivity. The developed method is accordingly a useful analytical tool for applications requiring both the total mass and the spatial distribution of metal NPs to be determined without damaging the sample surface (e.g., composite functional materials and NPs, decorated catalysts or electrodic materials).

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Spatial distribution of total polyphenols in multi-type of tea using near-infrared hyperspectral imaging

LWT ◽

10.1016/j.lwt.2021.111737 ◽

2021 ◽

pp. 111737

Author(s):

Yujie Wang ◽

Ying Liu ◽

Yuyu Chen ◽

Qingqing Cui ◽

Luqing Li ◽

...

Keyword(s):

Spatial Distribution ◽

Hyperspectral Imaging ◽

Near Infrared ◽

Total Polyphenols

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Evaluation of melon drying using hyperspectral imaging technique in the near infrared region

LWT ◽

10.1016/j.lwt.2021.111092 ◽

2021 ◽

Vol 143 ◽

pp. 111092

Author(s):

Jose Marcelino S. Netto ◽

Fernanda A. Honorato ◽

Patrícia M. Azoubel ◽

Louise E. Kurozawa ◽

Douglas F. Barbin

Keyword(s):

Hyperspectral Imaging ◽

Near Infrared ◽

Imaging Technique ◽

Infrared Region ◽

Near Infrared Region

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The potential of trace elements mapping in child’s natal tooth by laser ablation-ICPMS method

Journal of Environmental Health Science and Engineering ◽

10.1007/s40201-021-00611-2 ◽

2021 ◽

Author(s):

Aneta Olszewska ◽

Anetta Hanć

Keyword(s):

Trace Elements ◽

Spatial Distribution ◽

Quantitative Assessment ◽

Toxic Elements ◽

Tooth Enamel ◽

Perinatal Period ◽

Potentially Toxic Elements ◽

Metal Exposure ◽

Icp Ms ◽

Distribution Of Trace Elements

Abstract Purpose Tooth enamel might provide past chronological metabolic, nutritional status and trace metal exposure during development. Thus, the trace elements distribution embedded in tooth tissues represents an archive of the environmental conditions. The choice of biomarker is estimated as critical to the measurement of metal exposure. Natal teeth are defined as teeth being present at birth. Methods LA-ICP-MS provides a quantitative assessment of spatial distribution of trace elements in a natal tooth. The objective of the current study was to compare concentrations of building and other elements in a rare but reliable and valid biomarker - natal tooth. Results It have been reported presence of potentially toxic elements: Pb, Cu, Mn, Cd, Ni distributed in prenatally and perinatally formed enamel and dentine. Conclusions Analyses of deciduous enamel can provide answers into individuals’ earliest development, including critical pre- and perinatal period.

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Meat Quality Evaluation by Hyperspectral Imaging Technique: An Overview

Critical Reviews in Food Science and Nutrition ◽

10.1080/10408398.2010.507908 ◽

2012 ◽

Vol 52 (8) ◽

pp. 689-711 ◽

Cited By ~ 161

Author(s):

Gamal Elmasry ◽

Douglas F. Barbin ◽

Da-Wen Sun ◽

Paul Allen

Keyword(s):

Meat Quality ◽

Hyperspectral Imaging ◽

Quality Evaluation ◽

Imaging Technique

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Spatial impact and triggering conditions of the exceptional hydro-geomorphological event of December 1909 in Iberia

Natural Hazards and Earth System Science ◽

10.5194/nhess-16-371-2016 ◽

2016 ◽

Vol 16 (2) ◽

pp. 371-390 ◽

Cited By ~ 14

Author(s):

S. Pereira ◽

A. M. Ramos ◽

J. L. Zêzere ◽

R. M. Trigo ◽

J. M. Vaquero

Keyword(s):

Spatial Distribution ◽

Iberian Peninsula ◽

Large Scale ◽

Extreme Event ◽

Social Impacts ◽

Meteorological Conditions ◽

Pressure System ◽

Data Set ◽

Upper Level ◽

Disaster Event

Abstract. According to the DISASTER database the 20–28 December 1909 event was the hydro-geomorphologic event with the highest number of flood and landslide cases that occurred in Portugal in the period 1865–2010 (Zêzere et al., 2014). This event also caused important social impacts over the Spanish territory, especially in the Douro Basin, having triggered the highest floods in more than 100 years at the river's mouth in the city of Oporto. This work has a dual purpose: (i) to characterize the spatial distribution and social impacts of the December 1909 hydro-geomorphologic DISASTER event over Portugal and Spain; (ii) to analyse the meteorological conditions that triggered the event and the spatial distribution of the precipitation anomalies. Social impacts that occurred in Portugal were obtained from the Disaster database (Zêzere et al., 2014) whereas the data collection for Spain was supported by the systematic analysis of Spanish daily newspapers. In addition, the meteorological conditions that triggered the event are analysed using the 20th Century Reanalysis data set from NOAA and precipitation data from Iberian meteorological stations. The Iberian Peninsula was spatially affected during this event along the SW-NE direction spanning from Lisbon, Santarém, Oporto, and Guarda (in Portugal), to Salamanca, Valladolid, Zamora, Orense, León, and Palencia (in Spain). In Iberia, 134 DISASTER cases were recorded (130 flood cases; 4 landslides cases) having caused 89 casualties (57 due to floods and 32 due to landslides) and a further total of 3876 affected people, including fatalities, injured, missing, evacuated, and homeless people. This event was associated with outstanding precipitation registered at Guarda (Portugal) on 22 December 1909 and unusual meteorological conditions characterized by the presence of a deep low-pressure system located over the NW Iberian Peninsula with a stationary frontal system striking the western Iberian Peninsula. The presence of an upper-level jet (250 hPa) and low-level jet (900 hPa) located SW–NE oriented towards Iberia along with upper-level divergence and lower-level convergence favoured large-scale precipitation. Finally, associated with these features it is possible to state that this extreme event was clearly associated with the presence of an elongated Atmospheric River, crossing the entire northern Atlantic Basin and providing a continuous supply of moisture that contributed to enhance precipitation. This work contributes to a comprehensive and systematic synoptic evaluation of the second most deadly hydro-geomorphologic DISASTER event that has occurred in Portugal since 1865 and will help to better understand the meteorological system that was responsible for triggering the event.

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