All articles A–Z
519,064 articles
Hezekiah, descendant of David b. Zakkai (exilarch and gaon)
Hezekiah ben David, a descendant of the exilarch David ben Zakkai, led the Academy of Pumbedita from 1038 and was the last of its geonic line.
Hezekiah's revolt
Hezekiah's revolt was King Hezekiah's rebellion of Judah against Assyrian rule, launched after Sargon II's death in 705 BC and crushed by Sennacherib in 701 BC.
Hezhou
Hezhou (贺州) is a prefecture-level city in northeast Guangxi, China, bordering Guangdong and Hunan; distinct from Ezhou and the Tang-era Hezhou in Anhui. Forest-covered karst city, 2024 GDP 964.42 billion yuan, major flood-control and mining-area restoration projects.
Hezhou power station
Hezhou power station is a 2,090 MW coal-fired power plant in Hezhou, Guangxi, China, whose two ultra-supercritical units, commissioned in 2012, were the first in Guangxi.
Hezion
Hezion is a king or royal ancestor of Aram-Damascus in the late 10th century BC, known only from 1 Kings 15:18 as father of Tabrimmon.
Hezly Rivera
Hezly Rivera (born 2008) is an American artistic gymnast, 2024 Olympic team gold medalist at Paris and the youngest athlete on Team USA there, and 2025 and 2026 U.S. all-around champion training at WOGA under Valeri Liukin.
HF Sinclair
HF Sinclair Corporation is an American petroleum refining and renewable fuels company headquartered in Dallas, Texas, formed in 2022 as parent of HollyFrontier after acquiring Sinclair Oil.
HF Sinclair Tulsa refinery
The HF Sinclair Tulsa refinery is a petroleum refinery in Tulsa, Oklahoma, owned by HF Sinclair, with two plants along the Arkansas River processing 125,000 barrels of crude daily.
HFB1011 (anti-CCR8 antibody)
HFB1011 (HFB101110) is HiFiBiO Therapeutics' humanized anti-CCR8 monoclonal antibody that depletes tumor-infiltrating regulatory T cells via ADCC and blocks CCL1 binding; licensed to FibroGen in 2021, returned to HiFiBiO in 2025.
HfC-SiC ultra-high-temperature ceramic
HfC-SiC is an ultra-high-temperature ceramic composite of hafnium carbide and silicon carbide, designed for structural use above 2000 °C in hypersonic leading edges, thermal protection systems, and rocket propulsion.
Hfcp
HFCP is the naming convention used in SEC filings for the numbered private equity fund vehicles of Hellman & Friedman, a San Francisco buyout firm founded in 1984.
HFLS3
HFLS3 is a starbursting galaxy group at redshift 6.34, seen about 880 million years after the Big Bang and found in 2013 with the Herschel space observatory.
HfO2 ferroelectric synaptic device
HfO2 ferroelectric synaptic device is a nanoscale device using ferroelectric hafnium oxide or HZO to store artificial synapse weights in neuromorphic and in-memory computing hardware.
HfO2 superlattice ferroelectrics
HfO2 superlattice ferroelectrics are artificial layered structures in which nanometer-scale HfO2 films alternate with ZrO2 layers, stabilizing hafnia's metastable polar phase for ferroelectric memory and logic devices.
Hfq protein
Hfq, or host factor for phage Qβ, is a conserved bacterial RNA-binding protein that helps small regulatory RNAs base-pair with target messenger RNAs, shaping gene expression.
HFS Plus
HFS Plus, also called Mac OS Extended, is Apple's journaling file system, introduced with Mac OS 8.1 in 1998 and replaced by APFS in macOS High Sierra.
Hg Genesis
Hg Genesis is the longest-standing mid-market buyout fund family of Hg, the London software investor, run by HgCapital LLP from Guernsey; Genesis 11 targeted €7.5 billion in 2025–26.
Hg Saturn
Hg Saturn is the series of large-cap buyout funds managed by London software investor Hg and domiciled in Guernsey, holding Access Group, IFS, and Visma.
Hg(II)-responsive transcriptional regulator
Hg(II)-responsive transcriptional regulator, archetype MerR of the MerR family: bacterial homodimeric DNA-binding protein that activates mercury resistance (merTPAD) operons on Hg(II) binding by distorting suboptimally spaced promoters; used in heavy metal biosensors.
HGC-27
HGC-27 (CVCL_1279, ECACC 94042256) is a human gastric cancer cell line established in 1976 from a metastatic lymph node of a Japanese patient with undifferentiated carcinoma; mucin-producing, adherent, TP53/PIK3CA-mutant, highly invasive.
HgCdTe infrared detector
HgCdTe, also called mercury cadmium telluride or MCT, is a semiconductor alloy whose tunable bandgap makes it the dominant material for mid- and long-wave infrared detectors.
HGH Fragment 176–191
HGH Fragment 176-191 (hGH 176-191, Frag 176-191) is the synthetic 16-amino-acid C-terminal fragment of human growth hormone, sequence FLRIVQCRSVEGSCGF, studied for lipolytic activity; distinct from AOD-9604, with no human trials and no regulatory approval.
HGS
HGS (Hrs, Vps27, ZFYVE8), hepatocyte growth factor-regulated tyrosine kinase substrate at 17q25.3, encodes the 777-aa ESCRT-0 core protein that sorts ubiquitinated receptors into multivesicular bodies for lysosomal degradation.
HGST
HGST, or Hitachi Global Storage Technologies, was a hard disk drive manufacturer formed from Hitachi and IBM's HDD operations in 2003 and acquired by Western Digital in 2012.
HgTe colloidal quantum dots
HgTe colloidal quantum dots are solution-processed mercury telluride nanocrystals whose size tunes their optical response across the entire infrared range, the only colloidal material covering 0.7 to 100 µm.
HGTV
HGTV (Home & Garden Television) is an American cable network for home, renovation and design programming, launched in Knoxville, Tennessee, in 1994 by Ken Lowe at Scripps, now under Warner Bros. Discovery and streaming on Max and discovery+.
HH 211
HH 211, also written HH211, is a Herbig-Haro object and protostellar outflow in the Perseus Molecular Cloud about 1,000 light-years away, driven by a very young protostar.
HH 212
HH 212 is a Herbig-Haro object in Orion, a bright symmetric bipolar jet from a very young protostar near the Horsehead nebula, first imaged in 1998.
HH 34
HH 34 (Herbig-Haro 34) is a Herbig-Haro object in Orion about 1,350 light-years away, a glowing knot of shock-heated gas ejected in a jet from a young star.
HH 46/47
HH 46/47 (HH-47) is a complex of Herbig-Haro objects in the constellation Vela, driven by a protostar inside a Bok globule and imaged by Spitzer, Hubble, and Webb.