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A sample page from the BH 1 edition of Biblia Hebraica Kittel from 1909 (Genesis 1:1-17a). Biblia Hebraica refers primarily to the three editions of the Hebrew Bible edited by Rudolf Kittel. When referenced, Kittel's Biblia Hebraica is usually abbreviated BH, or BHK (K for Kittel). When specific editions are referred to, BH 1, BH 2 and BH 3 are ...
BH is defined as follows: [2] BH 1 is NP. BH 2k is the class of languages which are the intersection of a language in BH 2k-1 and a language in coNP. BH 2k+1 is the class of languages which are the union of a language in BH 2k and a language in NP. BH is the union of all the BH i classes.
The existence of the dodecaborate(12) anion, [B 12 H 12] 2−, was predicted by H. C. Longuet-Higgins and M. de V. Roberts in 1955. [1] Hawthorne and Pitochelli first made it 5 years later, by the reaction of 2-iododecaborane with triethylamine in benzene solution at 80 °C. [2] It is more conveniently prepared in two steps from sodium borohydride.
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The spectrum of boron monohydride includes a molecular band for the lowest electronic transition X 1 Σ + → A 1 Π with a band head at 433.1 nm (for 0→0) and 437.1 (for 0→1) [3] The spectrum contains P, Q, and R branches. [10] Although BH is a closed shell molecule, it is paramagnetic independent of temperature. [11]
There are 11 known isotopes ranging from 260 Bh to 274 Bh, and 1 isomer, 262m Bh. The longest-lived isotope is 270 Bh with a half-life of 2.4 minutes, although the unconfirmed 278 Bh may have an even longer half-life of about 690 seconds.
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IEEE 802.1: Higher Layer LAN Protocols Working Group: Active IEEE 802.2: LLC: Disbanded IEEE 802.3: Ethernet: Active [3] IEEE 802.4: Token bus: Disbanded IEEE 802.5: Token Ring MAC layer: Disbanded IEEE 802.6: MANs : Disbanded IEEE 802.7: Broadband LAN using Coaxial Cable: Disbanded IEEE 802.8: Fiber Optic TAG: Disbanded IEEE 802.9: Integrated ...