While the use of iron started to become more widespread around 1200 BC, mainly because of interruptions in the trade routes for tin, the metal is much softer than bronze.

While some people with bipolar disorder mainly experience manic symptoms, others more often feel depressed.

While in Fort Worth, Wills added the " rowdy city blues " of Bessie Smith and Emmett Miller to a repertoire of mainly waltzes and breakdowns he had learned from his father, and patterned his vocal style after that of Miller and other performers such as Al Bernard.

While the addition to the electron-rich alkenes and alkynes is mainly electrophilic, the nucleophilic addition plays an important role for the carbon-heteroatom multiple bonds, and especially its most important representative, the carbonyl group.

While an emphasis remains on agriculture and stock breeding, due to the climate and terrain of the island, there has been a drop in manufacturing, and an observable expansion in its service industries ( mainly tourism-related ).

While it has skin and blood ( cellular organic systems ), these serve mainly as a disguise and are not symbiotic with the machine components, a trait of true cyborgs.

While relations between the islands have had difficulties, mainly due the huge exodus of illegal immigrants from the Dominican Republic due to the nation's history of economic woes, the islands still, with the assistance of the United States Coast Guard and the Dominican Navy have worked hard to reduce the number of Dominicans crossing the Mona Passage in recent years.

While Charles Darwin is mainly noted for his treatise on evolution, he was one of the founders of soil ecology, and he made note of the first ecological experiment in The Origin of Species.

While he was billed as a supporting actor in the 1978 Battlestar Galactica pilot, a majority of his scenes were cut mainly because those scenes dealt with Serina's ( Jane Seymour ) " space cancer " B-story which had been excised from the final cut.

While glycerophospholipids are the major component of biological membranes, other non-glyceride lipid components such as sphingomyelin and sterols ( mainly cholesterol in animal cell membranes ) are also found in biological membranes.

While the CIA Factbook in 2006 stated that the " US is the only industrialized nation that does not mainly use the metric system ", ( in addition to non-industrialised Burma / Myanmar, Liberia ), the actual situation, however, is more complicated than the CIA Factbook would suggest-in the United Kingdom, for example, although metric is the official system for most regulated trading by weight or measure purposes, the pint is the official unit for milk in returnable bottles and for draught beer and cider in British pubs, and miles, yards and feet remain the official units for road signage.

While the mobility of walking vehicles is arguably higher than that of wheeled or tracked vehicles, their inherent complexity has limited their use mainly to experimental vehicles.

While some stations play all kinds of electronic dance music, others ( mainly pirate radio stations ) focus on particular genres.

While quarterbacks are mainly not a factor in terms of receiving forward passes, some trick plays, like the flea flicker, require quarterbacks to catch a lateral by a wide receiver or running back before delivering a forward pass.

While large farms concentrate mainly on the production of grain and husbandry products, small private household plots produce most of the country's yield of potatoes, vegetables and fruits.

While sociobiology is predicated on the observation that genes do affect behavior, it is perfectly consistent to be a sociobiologist while arguing that measured IQ variations between individuals reflect mainly cultural or economic rather than genetic factors.

While international trade has been present throughout much of history ( see Silk Road, Amber Road ), its economic, social, and political importance have increased in recent centuries, mainly because of Industrialization, advanced transportation, globalization, multinational corporations, and outsourcing.

While famous in his day as an opera composer, he is mainly remembered today for his instrumental music, such as the concertos, some of which are regularly recorded.

While the majority of the missile launches came from United States Department of Defense footage of ICBM missile tests ( mainly Minuteman IIIs from Vandenberg Air Force Base adjacent to Lompoc, California ), all of the stock footage of missile launches were acquired from declassified DoD film libraries.

While this book contains some history of the Nephites, including the death of Nephi, it is mainly a record of Jacob's preachings to his people.

While PEDOT ( poly ( 3, 4-ethylenedioxythiophene )) is mainly used in antistatic applications and as a transparent conductive layer in form of PEDOT: PSS dispersions ( PSS = polystyrene sulfonic acid ), polyaniline is widely used for printed circuit board manufacturing – in the final finish, for protecting copper from corrosion and preventing its solderability.

While cortical axons synapse mainly on spine heads of spiny neurons, nigral axons synapse mainly on spine shafts.

While Shea concentrated mainly on historical novels, Wilson produced over 30 works, mixing fictional novels with nonfiction.

While technically ' bong ' does not mean a device used for smoking mainly marijuana, drug-related connotations have been formed with the word itself ( partly due to punning with Sanskrit bhangah " hemp ").

While practicing for the show, stuntwoman Laura " Dinky " Patterson, one of a 16-member professional bungee jumping team, died of massive cranial trauma when she jumped headfirst from the top level of the Superdome and smashed head-first into the concrete-based playing field, causing her death.

While the Tsuburaya family's traditional religion was Nichiren Buddhism, Tsuburaya converted to Roman Catholicism in his later years ( his wife had already been a practicing Roman Catholic ).

While practicing a tap dance routine in his hotel bedroom, he awakens Dale Tremont ( Ginger Rogers ) on the floor below.

While supportive of the general ideals of the Christian church in which she was raised, Lisa became a practicing Buddhist in the episode " She of Little Faith " ( season 13, 2001 ) after she learned about the Noble Eightfold Path.

While the gang goes off to search for the bird, the game warden, keeping his promise to confiscate the birds and who witnessed the Aldens practicing for the big flight, comes to the Alden barn and seizes the geese.

While practicing, a lap belt failed in one of the Snowbirds ' aircraft, resulting in a mishap that killed the pilot of Snowbird 2.

While practicing the four-plane diamond loop, the formation impacted the ground at high speed, instantly killing all four pilots: Major Norman L. Lowry ( commander / leader ), Captain Willie Mays, Captain Joseph N. " Pete " Peterson, and Captain Mark Melancon.

While practicing law in Poughkeepsie, he served in the Dutchess County Assembly during the session of 1794 to 1795.

While practicing with Robby Ginepri for the Masters event in Rome, he broke his neck when he slipped on the clay and collided with the net post.

While in Great Britain practicing medicine, he learned French, Italian, and Spanish.

While practicing law in New York, he began lecturing at Columbia Law School in 1899 and joined the faculty as a full professor.

* January 18 – While practicing a line-abreast loop at Indian Springs Air Force Auxiliary Field in Nevada, four T-38 Talons of the United States Air Force Thunderbirds air demonstration team crash, killing all four pilots.

While practicing law there from 1852 until 1857, he was a delegate to the 1855 Ohio Republican Convention and an unsuccessful candidate for district attorney in 1856.

While practicing law in Idaho Falls in the 1980s, he was active in the Republican Party's campaigns for seats in the state legislature.

An Encyclopedia of Psychology notes that “ enerally, these terms are not used by either educators or psychologists .” While the concept of over-and underachievers has wide acceptance among practicing teachers, it remains a controversial topic on several points:

While practicing for the weekend's Busch Series race, Davey's younger brother, Clifford crashed hard in the third and fourth turns of Michigan International Speedway.

While being a lifelong practicing Christian, Kilgour has worked on issues inter-faith dialog, personal freedoms, and democratic government throughout his career.

While practicing, it is important to ensure that there are no weak keys.

While Chiao unraveled various lengths of cable from a caddy device, Barry spent time practicing the hookup of the various cables in the rigid umbilical to connectors in the bay, testing his ability to manipulate tiny bolts and screws in weightlessness.

While practicing medicine and surgery in Boston, he joined the Masonic Lodge of St. Andrew and eventually was appointed as a Grand Master.

While at a friend's house, he saw his friend's roommate practicing for an audition and was intrigued.

While practicing law, Ford became involved in the state militia and was promoted to the rank of major general.

While practicing law, Venkataraman was drawn into the movement for India's freedom from Britain's colonial subjugation.

While Osborn was practicing his hurdles and jumping in the field at his farm home in Illinois, the Western roll was gradually replacing an earlier jumping style called the scissor-kick.