{"id":"W2014685345","doi":"10.2134/jeq2002.4310","title":"Characterization of High‐Tannin Fractions from Humus by Carbon‐13 Cross‐Polarization and Magic‐Angle Spinning Nuclear Magnetic Resonance","year":2002,"lang":"en","type":"article","venue":"Journal of Environmental Quality","topic":"Soil Carbon and Nitrogen Dynamics","field":"Agricultural and Biological Sciences","cited_by":43,"is_retracted":false,"has_abstract":true,"ca_institutions":"Canadian Sport Centre Pacific; Natural Resources Canada","funders":"","keywords":"Humus; Tannin; Chemistry; Condensed tannin; Lignin; Proanthocyanidin; Magic angle spinning; Organic matter; Botany; Polyphenol; Organic chemistry; Nuclear magnetic resonance spectroscopy; Food science; Soil water; Biology","routes":{"ca_aff":true,"ca_fund":false,"ca_venue":false,"about_ca":true,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"codex-gemma-dda1882f352a","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.000162459,0.00009487431,0.0001792917,0.00001140098,0.00008190027,0.00003657903,0.00009253049,0.00008414265,0.0006733979],"category_scores_gemma":[0.00002690387,0.00005121806,0.00005960216,0.00007986493,0.0001062672,0.0001944195,0.00003515242,0.0001348293,0.000003763737],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.00004540094,"about_ca_system_score_gemma":0.000001115478,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.0004659608,"about_ca_topic_score_gemma":0.00002126239,"domain_scores_codex":[0.9990043,0.0001065424,0.0004040129,0.0001315503,0.0002478607,0.0001057383],"domain_scores_gemma":[0.9994091,0.00005609827,0.0004040092,0.00004422095,0.00001556115,0.0000710067],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"bench_or_experimental","study_design_gemma":"observational","study_design_scores_codex":[0.00002693857,0.0001253243,0.1847889,0.00000169226,0.000005726884,0.000001489907,0.0000774886,0.000001148909,0.8054626,0.00001083009,0.000009329903,0.009488561],"study_design_scores_gemma":[0.0002378176,0.0002059679,0.9922966,0.00001300932,0.00001686922,0.000007778503,0.0001006832,0.000536284,0.005547638,0.0001063444,0.0008358068,0.00009514519],"study_design_candidate":"observational","study_design_consensus":null,"genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9982575,0.001102973,0.000003330572,0.0002129918,0.00008212167,0.00005382689,0.0002209695,0.000006397442,0.00005995069],"genre_scores_gemma":[0.999159,0.0003549425,0.00007318581,0.0001295216,0.00009250275,4.544873e-7,0.00004583937,0.00000191695,0.000142575],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.8075078,"threshold_uncertainty_score":0.7373235,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.0132780303370673,"score_gpt":0.213054534775991,"score_spread":0.1997765044389237,"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."}}