When extended indefinitely, a layer of hexagonal boron nitride, BN, is obtained, with a structure identical to that of graphene apart from the alternation between boron and nitrogen in each ring.

When a trigonal boron atom accepts a pair of electrons from a Lewis base, it adopts a tetrahedral configuration ( sp < sup > 3 </ sup >), and the octet rule is satisfied.

When neodymium – iron – boron permanent magnets are used, levitation is achieved at low speeds.

When hit by a weak neutron beam, boron will locally emit radiation that will destroy the tumor.

When a positive charge develops in the alkene on the most substituted carbon atom, that is where the partially negatively charged hydrogen atom adds, leaving the least substituted carbon atom for the boron atom.

When combined with the metaphysical notion that pure forms of this universe are best appreciated when least embodied in a material substratum, it becomes clear that while earth will be dross on a scale of material-formal ratios, celestial bodies will be of a subtle, quickened, ethereal existence, in whose embodiment pure form will be the dominant component and matter will be absent or remain subsidiary.

When, as in this case, the two forms match, the address Af is saved to represent the occurrence Af.

) When the complete file has been read, the grammatical descriptions for all text forms found in the dictionary have been stored in the W-region ; ;

When a child fails to meet the standards of the school in his rate of learning, insecurity, unhappiness, and other forms of maladjustment frequently follow.

When Austria became a member of the European Union, the Austrian variety of the German language — limited to 23 agricultural terms — was " protected " in Protocol No 10, regarding the use of specific Austrian terms of the German language in the framework of the European Union, which forms part of the Austrian EU accession treaty.

116 .</ ref > When air condenses it becomes visible, as mist and then rain and other forms of precipitation, and as the condensed air cools Anaximenes supposed that it went on to form earth and ultimately stones.

When translated into Greek and Latin, the title took on different forms.

When benzodiazepines were first introduced, they were enthusiastically adopted for treating all forms of epilepsy.

When water percolates through limestone or other soluble carbonate rocks, it partially dissolves the rock and causes cave formation and characteristic stalactites and stalagmites and also forms hard water.

When the partial pressure of is reduced, for example when a can of soda is opened, the equilibrium for each of the forms of carbonate ( carbonate, bicarbonate, carbon dioxide, and carbonic acid ) shifts until the concentration of in the solution is equal to the solubility of CO < sub > 2 </ sub > at that temperature and pressure.

When monosaccharides are not immediately needed by many cells they are often converted to more space-efficient forms, often polysaccharides.

When ice forms on the beds, trucks can be driven onto the ice to spread a thin layer of sand that helps to control pests and rejuvenate the vines.

When numerals or other symbols are used as special graphical forms of letters, as 1337 for leet or the movie Se7en, they may be sorted as if they were those letters.

When Ford approached the U. S. Federal Aviation Administration ( FAA ) about regulatory issues, the critical problem was that the ( then ) known forms of air traffic control were inadequate for the volume of traffic Ford proposed.

When this material condenses in the rain, it forms dust and light sandy materials that resembles ground pumice.

When William of Orange, ruler of the Dutch Republic, occupied the British throne with his wife Mary in what has become known as the Glorious Revolution, gin became vastly more popular, particularly in crude, inferior forms, where it was more likely to be flavoured with turpentine as an alternative to juniper.

When combined with yttrium, it forms highly magnetic compounds.

When hemoglobin combines with CO, it forms a very bright red compound called carboxyhemoglobin, which may cause the skin of CO poisoning victims to appear pink in death, instead of white or blue.

When units occur in exponentiation, such as in square and cubic forms, any multiplier prefix is considered part of the unit, and thus included in the exponentiation.

When conditions are right for precipitation, calcite forms mineral coatings that cement the existing rock grains together, or it can fill fractures.

When RNA polymerase transcribes these regions, it recruits the N and forms a complex with several host Nus proteins.

When transcribed, each sequence forms a hairpin loop structure that the N protein can bind to.

" When the soul had overcome the third power, it went upwards and saw the fourth power, which took seven forms.

When a party becomes the largest party not to be represented in a Westminster-style parliament, the party's parliamentary group forms the Official Opposition, with Official Opposition frontbench team members often forming the Official Opposition Shadow cabinet.

When it comes to transforming these observations into practice, Koolhaas mobilizes what he regards as the omnipotent forces of urbanism into unique design forms and connections organised along the lines of present day society.

When she appeared, two or three of the little girls jumped up and down, yelling, `` Goody, goody ''.

When this second dilemma first became obvious -- during the mid to late '50's -- the United States appeared to have three choices.

`` When Konishi gets back with the jeep, I want you to round up two or three Japanese boys.

When everything had been done, Rector went back to his desk to occupy himself with his monthly report until three o'clock.

When three dice are tossed repeatedly, what is the probability that the number of aces is 0 ( or 1, or 2, or 3 )??

When now we count the frequency of the 71 items in the two language families appearing in the same column or grade, or one column or grade apart, or two or three or four, we find these differences: Af

When authorities convicted him of practicing medicine without a license ( he got off with a suspended sentence of three years because of his advanced age of 77 ), one of his victims was not around to testify: He was dead of cancer.

When he was told that no one had seen Burton since then, he thought of three other places that were possibilities.

When the mast was raised, Alexander gave the order for Small and Cromwell to be placed under arrest, and now three figures in irons sprawled upon the open deck and terror stalked the Somers.

When King Æthelwulf died in 858, Wessex was ruled by three of Alfred's brothers in succession, Æthelbald, Æthelbert and Æthelred.

* When 2000 was approaching, at least three large Swedish magazines ranked penicillin as the most important discovery of the millennium.

When White eventually returned three years later, Virginia and the other colonists were gone.

When the merger took place, all ten AFL franchises became part of the merged league's new American Football Conference ( AFC ), with three teams from the original 16-team NFL ( the Pittsburgh Steelers, Cleveland Browns, and Baltimore Colts ) joining them.

When the work was completed, three dragons rushed against the wall, and while the two of them which attacked those parts of the wall built by the gods fell down dead, the third forced its way into the city through the part built by Aeacus.

When the three drugs are taken together, there is a very high risk of developing renal failure.

When he arrives at the Necronomicon's location, he finds three books instead of one.

* SVO — Save opportunity: When a pitcher 1 ) enters the game with a lead of three or fewer runs and pitches at least one inning, 2 ) enters the game with the potential tying run on base, at bat, or on deck, or 3 ) pitches three or more innings with a lead and is credited with a save by the official scorer

When a few ( around three to six ) monosaccharides are joined together, it is called an oligosaccharide ( oligo-meaning " few ").

When defending against a smash, players have three basic options: lift, block, or drive.

When the Apple II, PET 2001 and TRS-80 were all released in 1977, all three had BASIC as their primary programming language and operating environment.

When the club folded after the 1870 season, Wright was hired by Boston businessman, Ivers Whitney Adams to organize a new team in Boston, and he did, bringing three teammates and the " Red Stockings " nickname along ( Most nicknames were then only nicknames, neither club names nor registered trademarks, so the migration was informal ).

" When or where Teach collected the ten gun Briganteen is unknown, but by that time he may have been in command of at least 150 men split between three vessels.

When Selig was only three, Marie began taking him and his older brother, Jerry, to Borchert Field, where the minor league Milwaukee Brewers played.

When a symbol is not marked by any of the three grammar symbols ( square, cone, inverted cone ), they may be a non material thing, a grammatical particle, etc.