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X Demographics
Mendeley readers
Attention Score in Context
| Title |
Pretreatment of anaerobic digester samples by hydrochloric acid for solution-state 1H and 13C NMR spectroscopic characterization of organic matter
|
|---|---|
| Published in |
Chemosphere, February 2018
|
| DOI | 10.1016/j.chemosphere.2018.02.015 |
| Pubmed ID | |
| Authors |
Sepehr Shakeri Yekta, Mattias Hedenström, Jan Eric Stehr, Mårten Dario, Norbert Hertkorn, Annika Björn |
| Abstract |
Pretreatment of anaerobic digester samples by hydrochloric acid (HCl) resulted in removal of Fe-based mineral and coordination compounds, attenuating their interferences with solution-state nuclear magnetic resonance (NMR) spectroscopic characterization of the solid phase organic matter. Substrate (influent) and digestate (effluent) samples from two full-scale anaerobic digesters, designated CD (co-digester) and SSD (sewage sludge digester), were investigated. Pretreatment of CD samples with 0.2-2.0 mol l-1HCl and pretreatment of SSD samples with 1.0-3.0 mol l-1HCl removed 96-100% and 76-80% of total Fe, respectively. Pretreatment declined overall paramagnetic characteristics of digestate samples, manifested by 50% (CD) and 70% (SSD) decrease in electron paramagnetic resonance signal intensities. As a result, meaningful solution-state1H,13C heteronuclear single quantum coherence and1H NMR spectra of DMSO-d6soluble organic matter could be acquired. Sample pretreatment with the lowest concentration of HCl resulted in alteration of C:N ratios in solid phase, likely due to removal of labile organic and inorganic C- and N-containing compounds, while elevating the HCl concentration did not further change the C:N ratios. Furthermore, sample pretreatment increased the solubility of carbohydrates and proteins in DMSO-d6, enabling the detection of NMR resonances from certain structural units of carbohydrates (e.g. anomeric O2CH) and proteins (e.g. CHα in amino acids). Both attenuation of the paramagnetic matrix as well as an enhanced solubility of carbohydrate and protein fractions of the samples in DMSO-d6solvent contributed to an improved molecular characterization of anaerobic digester samples by solution-state NMR analysis. |
X Demographics
The data shown below were collected from the profile of 1 X user who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 1 | 100% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 1 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 15 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 15 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 4 | 27% |
| Student > Master | 3 | 20% |
| Other | 2 | 13% |
| Researcher | 1 | 7% |
| Professor > Associate Professor | 1 | 7% |
| Other | 1 | 7% |
| Unknown | 3 | 20% |
| Readers by discipline | Count | As % |
|---|---|---|
| Environmental Science | 3 | 20% |
| Engineering | 2 | 13% |
| Agricultural and Biological Sciences | 2 | 13% |
| Chemistry | 2 | 13% |
| Chemical Engineering | 1 | 7% |
| Other | 1 | 7% |
| Unknown | 4 | 27% |
Attention Score in Context
This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 20 February 2018.
All research outputs
#17,292,294
of 25,382,440 outputs
Outputs from Chemosphere
#8,159
of 13,460 outputs
Outputs of similar age
#282,156
of 445,948 outputs
Outputs of similar age from Chemosphere
#107
of 222 outputs
Altmetric has tracked 25,382,440 research outputs across all sources so far. This one is in the 21st percentile – i.e., 21% of other outputs scored the same or lower than it.
So far Altmetric has tracked 13,460 research outputs from this source. They receive a mean Attention Score of 4.6. This one is in the 28th percentile – i.e., 28% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 445,948 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 27th percentile – i.e., 27% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 222 others from the same source and published within six weeks on either side of this one. This one is in the 40th percentile – i.e., 40% of its contemporaries scored the same or lower than it.