Summary of Study ST002004

This data is available at the NIH Common Fund's National Metabolomics Data Repository (NMDR) website, the Metabolomics Workbench, https://www.metabolomicsworkbench.org, where it has been assigned Project ID PR001270. The data can be accessed directly via it's Project DOI: 10.21228/M8JM6B This work is supported by NIH grant, U2C- DK119886.

See: https://www.metabolomicsworkbench.org/about/howtocite.php

This study contains a large results data set and is not available in the mwTab file. It is only available for download via FTP as data file(s) here.

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Study ID	ST002004
Study Title	Metabolomics analysis of anaerobic digesters
Study Summary	In order to identify metabolites descriptive of alterations of the working themperature during the process of anaerobic digestion, we performed untargeted metabolomics on samples of sewage sludge collected from two reactors working in parallel but with different temperature settings.
Institute	INRAE
Last Name	Chapleur
First Name	Olivier
Address	1 rue Pierre-Gilles de Gennes, 92761 Antony Cedex, FRANCE
Email	olivier.chapleur@inrae.fr
Phone	+33 0140966506
Submit Date	2021-11-26
Num Groups	14
Raw Data Available	Yes
Raw Data File Type(s)	mzXML
Analysis Type Detail	LC-MS
Release Date	2021-12-08
Release Version	1

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Sample Preparation:

Sampleprep ID:	SP002091
Sampleprep Summary:	For every sample, four aliquots with 0.75 mL of sludge were prepared in 2-mL Eppendorf tubes. Then, 1 mL of phosphate buffer saline was added into each tube and the sludge volumes were washed by centrifuging them at 15500 rcf for 3 min at 4 °C. This process was repeated once. The samples were freeze-dried overnight and, for every sample, 20 mg of dried sludge were transferred in new Eppendorf tubes. Then, the dried sludge powders were resuspended in 1 mL of a cold ddH2O: MeOH mixture (1:1) containing 2.5 mM PIPES. The samples were sonicated for 6 min, and submerged in liquid nitrogen. After one minute, the samples were thawed in ice. The cold-shock step was repeated twice. Afterwards, the samples were agitated for 15 min at 420 rpm in an orbital shaker. Following this, the samples were centrifuged at 15500 rcf for 3 min at 4 °C and the supernatants were collected. The supernatants were immediately filtered with 0.45 μM Nylon filters and freeze-dried overnight. The dried extracts were left at -80°C until the HPLC-MS analyses.

Sampleprep ID:

SP002091

Sampleprep Summary:

For every sample, four aliquots with 0.75 mL of sludge were prepared in 2-mL Eppendorf tubes. Then, 1 mL of phosphate buffer saline was added into each tube and the sludge volumes were washed by centrifuging them at 15500 rcf for 3 min at 4 °C. This process was repeated once. The samples were freeze-dried overnight and, for every sample, 20 mg of dried sludge were transferred in new Eppendorf tubes. Then, the dried sludge powders were resuspended in 1 mL of a cold ddH2O: MeOH mixture (1:1) containing 2.5 mM PIPES. The samples were sonicated for 6 min, and submerged in liquid nitrogen. After one minute, the samples were thawed in ice. The cold-shock step was repeated twice. Afterwards, the samples were agitated for 15 min at 420 rpm in an orbital shaker. Following this, the samples were centrifuged at 15500 rcf for 3 min at 4 °C and the supernatants were collected. The supernatants were immediately filtered with 0.45 μM Nylon filters and freeze-dried overnight. The dried extracts were left at -80°C until the HPLC-MS analyses.