{"query": "Oxygen (O) — element 8", "count": 20, "results": [{"id": "card_ref_el_008", "title": "Oxygen (O) — element 8", "shelf": "chemistry", "surface": "secular", "snippet": "Atomic number 8. Symbol O. Standard atomic weight 15.999. The oxygen atom carries 8 protons in its nucleus; its place in the periodic table is fixed by that count. Verified reference data.", "authority_tier": "reference", "source": "Verified reference — chemistry", "generated": false}, {"id": "card_theory_dalton_s_atomic_theory", "title": "Dalton's atomic theory", "shelf": "theories", "surface": "secular", "snippet": "Dalton's atomic theory — an engine domain that can touch it: chemistry. Calibration: partial — mass ratios verify. Matter is made of indivisible atoms; all atoms of an element share a mass; compounds ", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "generated": false}, {"id": "card_theory_stellar_nucleosynthesis_the_hr_diagram", "title": "Stellar nucleosynthesis & the HR diagram", "shelf": "theories", "surface": "secular", "snippet": "Stellar nucleosynthesis & the HR diagram — an engine domain that can touch it: astronomy. Calibration: partial — specific relations verify; the theory as a whole is not a sealable computation. Where t", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "generated": false}, {"id": "card_theory_law_of_conservation_of_mass", "title": "Law of conservation of mass (Lavoisier)", "shelf": "theories", "surface": "secular", "snippet": "Law of conservation of mass (Lavoisier) — an engine domain that can touch it: chemistry. Calibration: seals — balanced equations verify exactly. Mass is neither created nor destroyed in a chemical rea", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "generated": false}, {"id": "card_theory_exercise_physiology", "title": "Exercise physiology (VO₂max, HR zones)", "shelf": "theories", "surface": "secular", "snippet": "Exercise physiology (VO₂max, HR zones) — an engine domain that can touch it: exercise_science. Calibration: seals — max HR estimates, zones and work rates compute. VO₂max is the maximum rate of oxygen", "authority_tier": "reference", "source": "The Theory Assay — calibrated, not judged (docs/THEORY_CATALOG.md)", "generated": false}, {"id": "card_src_book_26243", "title": "Discovery of Oxygen, Part 2 — Carl Wilhelm Scheele", "shelf": "gutenberg", "surface": "secular", "snippet": "Discovery of Oxygen, Part 2, by Carl Wilhelm Scheele. Subjects: Phlogiston; Oxygen. Read the full text (public domain): https://www.gutenberg.org/ebooks/26243", "authority_tier": "reference", "source": "Project Gutenberg (public domain)", "generated": false}, {"id": "card_src_word_oxygen", "title": "oxygen", "shelf": "dictionary", "surface": "secular", "snippet": "oxygen: (noun) a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element i", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "generated": false}, {"id": "card_src_word_oxygen_acid", "title": "oxygen acid", "shelf": "dictionary", "surface": "secular", "snippet": "oxygen acid: (noun) any acid that contains oxygen — syn: oxyacid", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "generated": false}, {"id": "card_src_word_oxygen_deficit", "title": "oxygen deficit", "shelf": "dictionary", "surface": "secular", "snippet": "oxygen deficit: (noun) temporary oxygen shortage in cells resulting from strenuous exercise", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "generated": false}, {"id": "card_src_drug_oxygen_gas", "title": "Oxygen Gas", "shelf": "medicine", "surface": "secular", "snippet": "Oxygen Gas: a HUMAN PRESCRIPTION DRUG, gas given by the respiratory (inhalation) route.", "authority_tier": "reference", "source": "openFDA / FDA NDC Directory (public domain)", "generated": false}, {"id": "card_src_book_52162", "title": "On the Existence of Active Oxygen Thesis Presented for the Attainment of the Degree of Doctor of Philosophy at the Johns Hopkins University — Edward Harrison Keiser", "shelf": "gutenberg", "surface": "secular", "snippet": "On the Existence of Active Oxygen Thesis Presented for the Attainment of the Degree of Doctor of Philosophy at the Johns Hopkins University, by Edward Harrison Keiser. Subjects: Thesis (Ph. D.); Oxyge", "authority_tier": "reference", "source": "Project Gutenberg (public domain)", "generated": false}, {"id": "card_src_word_oxygen_mask", "title": "oxygen mask", "shelf": "dictionary", "surface": "secular", "snippet": "oxygen mask: (noun) a breathing device that is placed over the mouth and nose; supplies oxygen from an attached storage tank", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "generated": false}, {"id": "card_src_word_oxygen_debt", "title": "oxygen debt", "shelf": "dictionary", "surface": "secular", "snippet": "oxygen debt: (noun) a cumulative deficit of oxygen resulting from intense exercise; the deficit must be made up when the body returns to rest", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "generated": false}, {"id": "card_src_word_liquid_oxygen", "title": "liquid oxygen", "shelf": "dictionary", "surface": "secular", "snippet": "liquid oxygen: (noun) a bluish translucent magnetic liquid obtained by compressing gaseous oxygen and then cooling it below its boiling point; used as an oxidizer in rocket propellants — syn: LOX", "authority_tier": "reference", "source": "WordNet 3.0, Princeton University (WordNet License)", "generated": false}, {"id": "card_src_drug_oxygen", "title": "Oxygen", "shelf": "medicine", "surface": "secular", "snippet": "Oxygen: a HUMAN PRESCRIPTION DRUG, gas given by the respiratory (inhalation) route.", "authority_tier": "reference", "source": "openFDA / FDA NDC Directory (public domain)", "generated": false}, {"id": "card_src_drug_compressed_oxygen", "title": "Compressed Oxygen", "shelf": "medicine", "surface": "secular", "snippet": "Compressed Oxygen: a HUMAN PRESCRIPTION DRUG, inhalant given by the respiratory (inhalation) route.", "authority_tier": "reference", "source": "openFDA / FDA NDC Directory (public domain)", "generated": false}, {"id": "card_src_drug_helium_oxygen", "title": "Helium, Oxygen", "shelf": "medicine", "surface": "secular", "snippet": "Helium, Oxygen: a HUMAN PRESCRIPTION DRUG, gas given by the respiratory (inhalation) route.", "authority_tier": "reference", "source": "openFDA / FDA NDC Directory (public domain)", "generated": false}, {"id": "card_src_drug_oxygen_compressed_u_s_p", "title": "Oxygen, Compressed U.S.P.", "shelf": "medicine", "surface": "secular", "snippet": "Oxygen, Compressed U.S.P.: a HUMAN PRESCRIPTION DRUG, gas given by the respiratory (inhalation) route.", "authority_tier": "reference", "source": "openFDA / FDA NDC Directory (public domain)", "generated": false}, {"id": "card_src_drug_oxygen_helium_20_80", "title": "Oxygen/Helium 20/80", "shelf": "medicine", "surface": "secular", "snippet": "Oxygen/Helium 20/80: a HUMAN PRESCRIPTION DRUG, gas given by the respiratory (inhalation) route.", "authority_tier": "reference", "source": "openFDA / FDA NDC Directory (public domain)", "generated": false}, {"id": "card_src_drug_oxygen_helium_25_75", "title": "Oxygen/Helium 25/75", "shelf": "medicine", "surface": "secular", "snippet": "Oxygen/Helium 25/75: a HUMAN PRESCRIPTION DRUG, gas given by the respiratory (inhalation) route.", "authority_tier": "reference", "source": "openFDA / FDA NDC Directory (public domain)", "generated": false}]}