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Hajrul yahud bhasma
Hajrul yahud bhasma (Kushta Hajrul yahood, Lapis judaicus, Jew's stone) is a calcined fossil silicate-of-lime stone used in Unani and Ayurvedic medicine for kidney and bladder stones, with small clinical trials and rat toxicity studies.
Hak Jae Kim
Hak Jae Kim is an American engineer who won a Presidential Early Career Award, served at NGA and IARPA, and leads geospatial companies as chief technology officer.
Hak Soo Choi
Hak Soo Choi (최학수) is a Korean biomedical engineer, Professor of Radiology at Harvard Medical School, and director of the Bioengineering and Nanomedicine Program at Massachusetts General Hospital, known for near-infrared fluorescence imaging and kidney-clearable nanoparticles.
Hakan Oral
Hakan Oral is a Turkish-trained cardiac electrophysiologist and professor at the University of Michigan whose trials on pulmonary-vein ablation helped make catheter ablation standard treatment for atrial fibrillation.
Håkan Persson
Håkan Persson (1952–1993) was a Swedish cellular and molecular neuroscientist who founded the Laboratory of Molecular Neurobiology at the Karolinska Institute, where his group helped clone NT-3 and discovered neurotrophin 4/5.
Hákarl
Hákarl (kæstur hákarl) is Iceland's traditional fermented and dried Greenland shark (Somniosus microcephalus), documented since 1374; fermentation detoxifies toxic urea and TMAO, raising pH from 6 to 9, and the ammonia-scented result is eaten at þorrablót with Brennivín.
Hake
Hake is the common name for marine fish of the family Merlucciidae and related Phycidae, cod-like predators found near the sea floor at depths of over 1,000 meters that support major commercial fisheries on every continent.
Hakho Lee
Hakho Lee is a biomedical engineer and radiologist, Professor of Radiology at Harvard Medical School and director of biomedical engineering at Massachusetts General Hospital, known for the DMR biosensor and the SCOPE method.
Hakon Hakonarson
Hakon Hakonarson is an Icelandic-born physician-scientist who founded and directs the Center for Applied Genomics at Children's Hospital of Philadelphia and is a pediatrics professor at Penn.
Hal Drakesmith
Hal Drakesmith, who publishes as Alexander Drakesmith, is Professor of Iron Biology at the University of Oxford, where he studies how the hormone hepcidin regulates iron metabolism and anemia during infection.
Hal E. Broxmeyer
Hal E. Broxmeyer (1944–2021) was an American experimental hematologist at the Indiana University School of Medicine who established umbilical cord blood as a source of transplantable stem cells.
Halacaridae
Halacaridae, sea mites in superfamily Halacaroidea (Trombidiformes), are the only mite family fully adapted to marine life, with over 1,000 species from littoral to deep sea and the oldest extant secondarily marine animal lineage.
Halauxifen methyl
Halauxifen methyl (Arylex, XDE-729 methyl) is an arylpicolinate synthetic auxin herbicide launched in 2015 for broadleaf weed control in cereals at 5–30 g/ha, with a 10–30 day soil half-life and AFB5-preferring receptor binding.
Halazepam
Halazepam (Paxipam) is a trifluoroethyl benzodiazepine anxiolytic, C17H12ClF3N2O, metabolized to desmethyldiazepam, US Schedule IV since 1981, lower abuse liability than diazepam, no longer marketed in the US.
Halcyon
Halcyon (Blue Kingfishers), a genus of 12 Old World tree-kingfisher species in Alcedinidae, subfamily Halcyoninae, established by Swainson 1821; sister to Pelargopsis, once far more broadly circumscribed.
Halibut
Halibut: large right-eyed flatfishes, chiefly Atlantic halibut (Hippoglossus hippoglossus) and Pacific halibut (Hippoglossus stenolepis), the world's largest flatfish; Atlantic stock overfished with 2055 rebuilding target, Pacific managed by the IPHC since 1923.
Halichoerus
Halichoerus, gray seals, is a monotypic phocid seal genus whose sole species Halichoerus grypus (horsehead) lives across the North Atlantic and Baltic, with males up to 880 pounds and populations near 450,000 in North American waters.
Halichondria panicea
Halichondria panicea, the breadcrumb sponge (Pallas, 1766), a variable North Atlantic demosponge from the Barents Sea to the Mediterranean, intertidal to 569 m, with algal symbionts, a Rhodobacter-dominated microbiome, and cryptic Pacific relatives.
Haliclystus antarcticus
Haliclystus antarcticus (Antarctic stalked jellyfish) is a staurozoan cnidarian described by Pfeffer in 1889, known from Antarctica, Chile, and South Georgia; its juvenile stage was formerly misdescribed as the hydrozoan Microhydrula limopsicola.
Halictidae
Halictidae, the sweat bees, is the second-largest bee family with over 4,000 species on six continents, identified by a strongly curved basal wing vein, ranging from solitary to eusocial behavior.
Halictidae systematics
Halictidae systematics covers the taxonomy and phylogeny of Halictidae, commonly called sweat bees. Current classification recognizes four subfamilies, with the large Halictinae containing Halictus, Lasioglossum, and the kleptoparasitic Sphecodes.
Halictus
Halictus, furrow bees, is a genus of about 200 ground-nesting sweat bees (Halictidae, Halictini) whose common ancestor was eusocial, with 4–6 reversals to solitary nesting; socially polymorphic species like H. rubicundus make it a model for social evolution.
Haliotis midae
Haliotis midae, perlemoen, is South Africa's endemic and only commercially fished and farmed abalone; an IUCN Endangered species whose legal fishery collapsed under organised poaching but persists alongside a major aquaculture industry.
Haliotis rubra
Haliotis rubra, blacklip abalone (Leach, 1814), an Australian endemic vetigastropod abalone of rocky reefs from NSW to Rottnest Island; up to 21 cm, diet mainly red algae, basis of Australian abalone fisheries, IUCN Vulnerable.
Haliplidae
Haliplidae, crawling water beetles, a family of about 240 small aquatic adephagan beetles worldwide, defined by enlarged hind coxal plates used as air stores, herbivorous larvae, and poor swimming.
Hall technique
The Hall technique is a minimally invasive pediatric dentistry method that seals a preformed metal crown over a decayed baby molar without drilling or anesthesia.
Hall Wines of Napa, L.P.
Hall Wines of Napa, L.P. is a Delaware limited partnership serving as the private-offering vehicle for the Hall family's Napa Valley wine business in St. Helena, California.
Hall-Riggs syndrome
Hall-Riggs syndrome (ORPHA:2107, OMIM 234250) is an extremely rare autosomal recessive disorder with microcephaly, facial dysmorphism, spondylometaphyseal dysplasia, severe intellectual disability, and absent speech; eight cases in two families reported since 1975.
Hallermann-Streiff syndrome
Hallermann-Streiff syndrome, also known as François dyscephalic syndrome or oculomandibulofacial syndrome, is a rare genetic disorder marked by bird-like facies, dental abnormalities, sparse hair, short stature, and congenital cataracts.
Hallowell Davis
Hallowell Davis (1896–1992) was an American neurophysiologist who helped found clinical electroencephalography in the United States and became a leading figure in audiology and hearing conservation.