Distribution and Sources of Fatty Acids in Sediment Samples from Shatt Al-Arab Estuary and Northwest Arabian Gulf
Bibliographic record
Abstract
Surface sediments (10 cm) of the subtropical Shatt Al-Arab estuary and Northwest Arabian Gulf were collected to study the fatty acids distribution and sources .Samples were analyzed by gas chromatography. Other relevant parameters were measured including total organic carbon, and grain size. A total of 31 fatty acids were identified from the superficial sediment samples, including polyunsaturated PUFA, monounsaturated (MUFA), and saturated and branched fatty acids. The total FA (TFA) concentrations were in the range 13.32-35.72 µg/g dry weight (dw).Generally, the abundances of the 31 FAs showing strong even/odd numbered predominance, and ranging from C12 to C32 were C14 (1.68-12.45%), C16 (2.92-13.49%), C18 (0.87-12.75), C19 (0.87-3.29%), C24 (0.19-6.99%) and C26 (nd-8.90%), C28(nd-5.91%). These distributions are indicative of input of terrestrial, phytoplanktonic and bacterial lipid residues. The sums of long chain FAs (LCFAs) C24-C32 concentrations of were calculated. High values of terrestrial Organic Matter (OM)were found at Shatt Al-Arab, the values were in the range 4.05-4.46 µg/g (dw), with contribution relative to the TFAs ranging from 12.49-21.99% (mean 17.99%). While low values were found at the North West Arabian Gulf , the values were in the range 0.03-0.09 µg/g (dw), with contribution relative to the TFAs ranging from 0.19-0.68 % (mean 0.36%).
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".