72,234 articles
Hooded seal
The hooded seal, or bladder-nosed seal, (Cystophora cristata), is a large earless seal inhabiting the North Atlantic and Arctic Oceans, characterized by its males' inflatable nasal hood.
Hoof
A hoof is the hard, keratin-covered tip of the foot in hoofed mammals, enclosing the last foot bone and bearing the animal's weight; horses have one hoofed toe, cattle and deer two.
Hook, C-terminal
Hook, C-terminal (IPR008636, Hook_C; Pfam PF05622) is the divergent cargo-binding domain of Hook dynein adaptor proteins, following the N-terminal Hook domain and three coiled-coils; it mediates isoform-specific organelle binding such as Hook3 Golgi targeting.
Hookworm
Hookworm is an intestinal parasitic nematode infection of humans, caused chiefly by Necator americanus and Ancylostoma duodenale, in which larvae in soil penetrate the skin and feeding worms cause iron deficiency anemia.
Hookworm infection
Hookworm infection: intestinal parasitism by Ancylostoma duodenale, A. ceylanicum, or Necator americanus, acquired through skin penetration by soil larvae; causes iron-deficiency anemia in roughly 406-480 million people, treated with albendazole or mebendazole.
Hooman Kamel
Hooman Kamel is an American neurologist and clinical scientist at Weill Cornell Medicine known for research on stroke prevention, especially the link between cardiac disease and ischemic stroke.
Hoopoe
Hoopoe (Upupa epops, Common or Eurasian Hoopoe): a crested Bucerotiformes bird of family Upupidae, sister to woodhoopoes and hornbills; known for antibiotic-producing Enterococcus symbionts in its uropygial gland, egg-smearing, and Palearctic-Africa migration.
Hoosen Coovadia
Hoosen Coovadia, known as Jerry, was a South African pediatrician and HIV researcher at the University of KwaZulu-Natal whose work on preventing mother-to-child HIV transmission changed clinical practice across Africa, and who opposed AIDS denialism.
Hop beta acids
Hop beta acids (lupulone, colupulone, adlupulone) are bitter resins of Humulus lupulus cones, less bitter and less water-soluble than alpha acids, with strong antimicrobial activity against Gram-positive bacteria and GRAS status (GRN 63) for meat products.
Hop bitter acids
Hop bitter acids are prenylated acylphloroglucinol secondary metabolites of the hop plant (Humulus lupulus), divided into alpha-acids such as humulone and beta-acids such as lupulone.
Hope (sloop)
Hope (sloop): 1948 gaff-rigged wooden oyster sloop built by the Chard family on Brush Island, Greenwich, Connecticut; the last sail-powered oyster sloop built on Long Island Sound, later a Norwalk museum vessel, one of three surviving US oyster sloops.
HOPE COVID 19 study
HOPE COVID-19 (Health Outcome Predictive Evaluation for COVID-19, NCT04334291) is an international investigator-initiated observational registry of 8,168 hospitalized COVID-19 patients led from Hospital Clínico San Carlos, Madrid, studying mortality, prognostic scores, and treatments; HOPE-II is its 55-center successor.
Hope S. Rugo
Hope S. Rugo is an American medical oncologist specializing in breast cancer, known for the phase 3 CAPItello-291 and ASCENT trials and, since 2025, chief of breast medical oncology at City of Hope.
HOPE trial (NCT05550584)
HOPE trial (NCT05550584), Italian randomized non-inferiority study at Gemelli IRCCS comparing THRIVE high-flow nasal oxygen (70 L/min) with I-Gel laryngeal mask ventilation during operative hysteroscopy under anesthesia; 180 patients, completed May 2023; distinct from stroke and liver HOPE trials.
Hopea
Hopea is a genus of about 100 dipterocarp timber trees from Sri Lanka to New Guinea, known as merawan timber, distinguished from Shorea by two long fruit calyx wings and nested phylogenetically within Shorea.
Hopi Hoekstra
Hopi Hoekstra is an American evolutionary geneticist at Harvard, Edgerley Family Dean of the Faculty of Arts and Sciences since 2023, known for studying the genetic and neural basis of adaptation and behavior in wild mice.
Hôpital Beaujon
Hôpital Beaujon, AP-HP hospital in Clichy (Hauts-de-Seine), France; short-stay adult CHU of GHU Nord – Université Paris Cité; opened 1935 as France's first monobloc high-rise hospital; digestive and head-neck-spine excellence; moving to Saint-Ouen in 2031.
Hôpital Cochin
Hôpital Cochin is a public university hospital in Paris belonging to Assistance publique – Hôpitaux de Paris, founded in 1780 by Jean-Denis Cochin, with sites at Cochin, Port-Royal, and Tarnier.
Hôpital Lariboisière
Hôpital Lariboisière (Hôpital Lariboisière – Fernand-Widal), AP-HP university hospital in Paris's 10th arrondissement. Inaugurated 1854, France's first pavilion-plan hospital, funded by comtesse Élisa de Lariboisière's bequest; architect Martin-Pierre Gauthier.
Hôpital Notre-Dame
Hôpital Notre-Dame, Montreal hospital founded 1880 by Dr Emmanuel Persillier-Lachapelle; first secular Francophone hospital in North America, at 1560 Sherbrooke Est, now part of CIUSSS Centre-Sud-de-l'Île-de-Montréal.
Hôpital Saint-Antoine
Hôpital Saint-Antoine, AP-HP public teaching hospital in Paris's 12th arrondissement, on the site of the 1198 abbaye Saint-Antoine-des-Champs; 665 beds, CRSA Inserm/Sorbonne research unit, AP-HP headquarters since 2022.
Hôpital Saint-Louis
Hôpital Saint-Louis is a public AP-HP teaching hospital in Paris's 10th arrondissement, founded by Henri IV's 1607 edict as a plague isolation hospital, birthplace of French dermatology, and a reference center for hematology, oncology, transplantation, and burns.
Hôpital Tenon
Hôpital Tenon is a public teaching hospital of the Assistance Publique–Hôpitaux de Paris in the 20th arrondissement of Paris, opened in 1878, where singer Édith Piaf was born in 1915.
Hopkins Symptom Checklist
The Hopkins Symptom Checklist (HSCL) is a family of self-report questionnaires measuring depression and anxiety symptoms, used in clinical screening and psychiatric research since 1974.
Hoplerythrinus unitaeniatus
Hoplerythrinus unitaeniatus, the jeju or gold wolf fish (aimara), a South American trahira fish of the Erythrinidae that breathes air through a vascularized swimbladder across five major river basins.
Hoplias malabaricus
Hoplias malabaricus, the trahira, is a carnivorous freshwater fish widespread from northern to southern South America, known as a top predator important to artisanal fisheries.
Hoplites
Hoplites Neumayr, 1875 is an extinct Albian ammonite genus (family Hoplitidae) with type species Ammonites dentatus, validated by ICZN Opinion 353; its hoplitid relatives define Boreal Realm biostratigraphy from Mexico to Iran.
Hoplobatrachus
Hoplobatrachus, tiger frogs or bullfrogs (Peters, 1863), a genus of six dicroglossid frog species native to Subsaharan Africa and South and Southeast Asia; H. tigerinus, the Indian bullfrog, is CITES Appendix II listed and invasive on the Andaman archipelago and Madagascar.
Hoplosternum littorale
Hoplosternum littorale (brown hoplo, atipa, tamboatá), a callichthyid armored catfish from South America; air-breathing bubble-nest builder, up to 26.3 cm, invasive and established in Florida since 1995, valued food fish.
Hoplostethus mediterraneus
Hoplostethus mediterraneus, the Mediterranean slimehead or silver roughy (Cuvier, 1829), a benthopelagic Trachichthyidae fish of 100–1,463 m depth, circumtropical, IUCN Least Concern, trawl bycatch, lifespan about 11 years.