All articles starting with B

Bulk polymerization

Bulk polymerization is the conversion of neat, undiluted monomer into polymer with no added solvent, used for PMMA and polystyrene, but rising viscosity makes heat removal difficult and can cause runaway reaction.

Bulk reconstruction

Bulk reconstruction is the AdS/CFT research program that writes bulk fields in anti-de Sitter space as nonlocal operators of the boundary conformal field theory, starting with the 2006 HKLL smearing construction.

Bulk Richardson number

The bulk Richardson number (BRN) is a dimensionless ratio of convective available potential energy to vertical wind shear, used in storm forecasting to distinguish supercells from multicell storms.

Bulk sampling

Bulk sampling is a statistical method for estimating properties of bulk materials like ore, coal, and grain by combining many small increments into composite samples.

Bulk sequencing

Bulk sequencing is a nucleic acid sequencing approach that reads pooled DNA or RNA from a whole cell population, measuring average expression across hundreds to thousands of cells.

Bulk shear

Bulk shear is the magnitude of the vector wind difference between two fixed atmospheric levels, one of the most widely used shear measures in thunderstorm forecasting.

Bulk silicate Earth

Bulk silicate Earth, or primitive mantle, is the geochemical reference composition of Earth's silicate portion, the mantle plus crust, serving as the starting point for estimating the whole Earth's composition.

Bulk synchronous parallel

Bulk synchronous parallel (BSP) is a parallel computation model, introduced by Leslie Valiant in 1990, where programs run in supersteps ending at a global synchronization barrier.

Bulk tank

Bulk tank: refrigerated stainless-steel farm vessel (also bulk milk tank/cooler) that cools raw milk to about 4°C, agitates it, and holds it for truck collection; capacities 200–5,000 gal, DX or ice bank cooling.

Bulk water conveyance

Bulk water conveyance moves large volumes of water through pressurized trunk mains and inter-city pipelines, from sources or treatment works to storage, with no service connections.

Bulked segregant analysis

Bulked segregant analysis (BSA) is a genetic mapping method that pools DNA from individuals with contrasting phenotypes and compares allele frequencies to locate trait-linked genomic regions at low cost.

Bulked segregant analysis sequencing

Bulked segregant analysis sequencing (BSA-seq) sequences pooled DNA from individuals at opposite extremes of a trait in a segregating population, mapping disease resistance and mutant loci, especially in plants.

Bulkhead (partition)

A bulkhead, also called a partition bulkhead, is a partition wall that subdivides a ship's interior into compartments; watertight ones contain flooding after hull damage.

Bulking and cutting

Bulking and cutting is the practice of alternating a caloric-surplus bulking phase with a caloric-restriction cutting phase to gain muscle and lose fat, common among bodybuilders and gym populations.

Bull

Bull: uncastrated adult male domestic cattle used as a herd sire or semen donor. Distinguished by breeding soundness examination criteria (scrotal circumference, motility, morphology) and AI-versus-natural-service economics.

Bull (2016 TV series)

Bull (2016 TV series): American CBS legal drama (2016–2022, six seasons, 125 episodes) starring Michael Weatherly as trial consultant Dr. Jason Bull, created by Paul Attanasio and Phil McGraw and inspired by Dr. Phil's early career; streams on Paramount+ and Apple TV.

Oct 21, 2026

Bull Canyon Formation

Bull Canyon Formation: Upper Triassic (Norian) mudstone formation in east-central New Mexico, Chinle/Dockum Group; named by Lucas and Hunt (1989); type fauna of the Revueltian land-vertebrate faunachron.

Bull Connor

Bull Connor (Theophilus Eugene Connor, 1897-1973), Birmingham, Alabama commissioner of public safety for 22 years, ordered police dogs and fire hoses against 1963 civil rights demonstrators, spurring the Civil Rights Act of 1964.

Bull Durham

Bull Durham is a 1988 American romantic comedy sports film directed by Ron Shelton, starring Kevin Costner, Susan Sarandon, and Tim Robbins, set around the minor league Durham Bulls.

Sep 19, 2026

Bull Headed Lyre of Ur

The Bull Headed Lyre of Ur, also called the Great Lyre, is a gold and lapis bull-headed lyre from the Royal Cemetery at Ur, held by the Penn Museum.

Bull Mountains No. 1 Coal Mine

Bull Mountains Mine No. 1 is an underground longwall coal mine near Roundup, Montana, operated by Signal Peak Energy and exporting most of its coal to Japan and South Korea.

Bull Nakano (ブル中野)

Bull Nakano (ブル中野), real name Keiko Nakano, Japanese wrestler of 1980s-90s AJW, WWWA champion, only Japanese WWF Women's Champion (1994 Tokyo Dome), later golfer, WWE Hall of Fame 2024.

Sep 19, 2026

Bull Palette

The Bull Palette is a fragmentary greywacke ceremonial cosmetic palette from late Predynastic Egypt, about 3200 to 3100 BC, decorated with a bull trampling a defeated man and now in the Louvre.

Bull riding

Bull riding, a rodeo roughstock event and standalone PBR sport: riders stay on a bucking bull for 8 seconds one-handed, scored to 100 points; injury rates of 28.5-48.2 per 1000 exposures make it rodeo's most dangerous event.

Bull Ring, Birmingham

Bull Ring, Birmingham: market site at the city's core since a 1166 charter; 1964 £8m shopping centre demolished 2000; current Bullring opened 2003 with Future Systems' Selfridges and 36.5 million first-year visitors.

Bull Run (film)

Bull Run (original title Discussion Materials) is a 2024 American Wall Street comedy directed by Alfredo Barrios Jr., adapted from Bill Keenan's book, starring Tom Blyth as ex-hockey-player-turned-junior-banker Bobby Sanders; released by Vertical on November 14, 2025. Distinct from a 2023 Spanish crypto documentary of the same name.