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Recommendations for selection of target parameters and process recommendations for audiological and technical functional testing of cochlear implant : Prepared by the ERA consortium (AG-ERA) of ADANO in cooperation with the Implantable Hearing Systems expert committee of the DGA. Confirmed by the board of ADANO on 31.01.2025.

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Same author

[Recommendations for selection of target parameters and process recommendations for audiological and technical functional testing of cochlear implant : Prepared by the ERA consortium (AG-ERA) of ADANO in cooperation with the Implantable Hearing Systems expert committee of the DGA. Confirmed by the board of ADANO on 31.01.2025. German version].

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An enzyme(s) that converts glutaminyl-peptides into pyroglutamyl-peptides. Presence in pituitary, brain, adrenal medulla, and lymphocytes.

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Related Experiment Video

Updated: Jul 12, 2026

Characterization, Quantification and Compound-specific Isotopic Analysis of Pyrogenic Carbon Using Benzene Polycarboxylic Acids (BPCA)

Characterization, Quantification and Compound-specific Isotopic Analysis of Pyrogenic Carbon Using Benzene Polycarboxylic Acids (BPCA)

Published on: May 16, 2016

Polycyclic aromatic hydrocarbons in soils and recent sediments.

M Blumer, W W Youngblood

Science (New York, N.Y.)

|April 4, 1975

Summary

Natural fires produce complex polycyclic aromatic hydrocarbons (PAHs) found in soils and marine sediments. These PAHs are transported by air and deposited, showing consistent molecular weight distributions across diverse environments.

Area of Science:

Environmental Chemistry
Geochemistry
Organic Geochemistry

Background:

Soils and recent marine sediments harbor intricate polycyclic aromatic hydrocarbon (PAH) assemblages.
A notable similarity exists in the molecular weight distribution of various alkylated PAH series.
This distribution remains consistent across a broad spectrum of depositional environments.

Purpose of the Study:

To investigate the origin and transport mechanisms of PAHs in environmental samples.
To analyze the implications of PAH distribution patterns in sediments.
To discuss the analytical, geochemical, and environmental significance of these findings.

Main Methods:

Analysis of polycyclic aromatic hydrocarbon assemblages in soils and marine sediments.

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Last Updated: Jul 12, 2026

Characterization, Quantification and Compound-specific Isotopic Analysis of Pyrogenic Carbon Using Benzene Polycarboxylic Acids (BPCA)

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Published on: May 16, 2016

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Extraction and Analysis of Microbial Phospholipid Fatty Acids in Soils

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Examination of molecular weight distribution of alkylated PAH homologs.

Comparison of PAH distribution across diverse depositional settings.

Main Results:

A high degree of similarity was observed in the molecular weight distribution of alkylated PAH series.
This distribution showed minimal variation across a wide range of depositional environments.
Evidence points to natural fires as the primary source of these hydrocarbons.

Conclusions:

Natural fires are a significant source of PAHs in terrestrial and marine environments.
Atmospheric transport and deposition play a crucial role in the distribution of these compounds.
The consistent PAH distribution has important analytical, geochemical, and environmental implications.