{"id":"W2299645425","doi":"10.1021/acs.analchem.5b04392","title":"Organic Reference Materials for Hydrogen, Carbon, and Nitrogen Stable Isotope-Ratio Measurements: Caffeines, <i>n</i>-Alkanes, Fatty Acid Methyl Esters, Glycines, <scp>l</scp>-Valines, Polyethylenes, and Oils","year":2016,"lang":"en","type":"article","venue":"Analytical Chemistry","topic":"Isotope Analysis in Ecology","field":"Environmental Science","cited_by":187,"is_retracted":false,"has_abstract":true,"ca_institutions":"Université du Québec à Montréal","funders":"Division of Earth Sciences; U.S. Geological Survey","keywords":"Chemistry; Nitrogen; Organic chemistry; Hydrogen; Carbon fibers; Isotopes of carbon; Stable isotope ratio; Fatty acid; Total organic carbon","routes":{"ca_aff":true,"ca_fund":false,"ca_venue":false,"about_ca":false,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"metacan-v3-hybrid-931329e0061c","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.004817019,0.00208675,0.0007082158,0.006081354,0.001300733,0.001416729,0.002993095,0.002013879,0.01297506],"category_scores_gemma":[0.00383642,0.0007605372,0.0008314787,0.00489975,0.0006965075,0.001661717,0.00153341,0.001412416,0.009944297],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.001255125,"about_ca_system_score_gemma":0.002296009,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.00301329,"about_ca_topic_score_gemma":0.007476454,"domain_scores_codex":[0.9955106,0.0006189635,0.0003036168,0.0009164318,0.002425357,0.000225174],"domain_scores_gemma":[0.9969777,0.0002343455,0.0004430105,0.0007096037,0.001530595,0.0001048152],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"bench_or_experimental","study_design_gemma":"bench_or_experimental","study_design_scores_codex":[0.0003996996,0.0001932238,0.005199895,0.0008995485,0.0001065867,0.0002982081,0.0001746817,0.0009683295,0.8774775,0.005352838,0.01455314,0.09437634],"study_design_scores_gemma":[0.00008915154,0.000314106,0.008574893,0.0001865898,0.0001708941,0.0007029486,0.0002105235,0.002300706,0.7993903,0.001216992,0.1867671,0.00007573109],"study_design_candidate":"bench_or_experimental","study_design_consensus":"bench_or_experimental","genre_codex":"methods","genre_gemma":"empirical","genre_scores_codex":[0.1462388,0.007686459,0.7123914,0.0009346376,0.0018869,0.00215551,0.04505172,0.01186483,0.07178973],"genre_scores_gemma":[0.1638567,0.0079315,0.6823464,0.001751351,0.0004548806,0.004296385,0.06882806,0.003910635,0.06662408],"genre_candidate":"empirical","genre_consensus":null,"teacher_disagreement_score":0.01297506,"threshold_uncertainty_score":0.04340595,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.0190794918174099,"score_gpt":0.2382573330182394,"score_spread":0.2191778412008295,"validation_status":"score_only:v0-immature-baseline","note":"Baseline scores from an immature model (maturity gate not passed). Scores rank; they never assert a category."}}