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In chemistry, a heteroatom is any atom, not carbon or hydrogen. In practice, the term is used more to indicate that non-carbon atoms have replaced carbon in the backbone of the molecular structure. Typical heteroatoms are nitrogen, sulfur, chlorine and iodine, as well as the metals lithium and magnesium, it can be used with specific meanings in specialised contexts. In the description of protein structure, in particular in the Protein Data Bank file format, a heteroatom record describes an atom as belonging to a small molecule cofactor rather than being part of a biopolymer chain. In the context of zeolites, the term heteroatom refers to partial isomorphous substitution of the typical framework atoms by other elements such as beryllium and chromium; the goal is to adjust properties of the material to optimize the material for a certain application. Journal - Heteroatom Chemistry

Ian Whitten

Ian Whitten is an Irish rugby union player for Exeter in the Aviva Premiership. He was capped by Ireland on their 2009 tour to North America when he lined out against Canada on 23 May 2009, he plays as a centre. A former pupil of Wallace High School, Ian was recruited to the Phoenix Ulster Rugby Academy in 2007, having represented Ireland at U18 and U19 levels; the 2008-9 season was the real breakthrough season for Whitten with his first senior Ulster cap coming against Stade Francais in the Heineken Cup and he went on to establish himself in the side for the rest of the season. This culminated in a call-up to the Ireland squad for the summer tour of USA and Canada, where he won two senior caps, it was announced on 8 March 2012 that Whitten would be joining English Aviva Premiership side Exeter Chiefs for the 2012-2013 season. Whitten was involved in 16 games in his debut season with the Chiefs and was involved in the Chiefs maiden Heineken Cup campaign. Whitten established himself as a strong contender in the centers for the Chiefs with his good lines of running and strong defensive play.

He started the final as Exeter Chiefs defeated Wasps to be crowned champions of the 2016-17 English Premiership. Exeter Chiefs Player Profile Aviva Premiership Player Profile RaboDirectPRO12 Player Profile

Chains of Love (Erasure song)

"Chains of Love" is a song by British synthpop duo Erasure, released in May 1988 as their ninth single overall. The song was released by Mute Records as the second single from Erasure's third studio album The Innocents. In the United States, Sire Records released it as the first single; the album version was produced by Stephen Hague and was remixed for its single release. "Chains of Love" became Erasure's sixth consecutive Top 20 hit on the UK singles chart, just missing the Top 10 by peaking at number 11. In the United States, it became Erasure's mainstream breakthrough by climbing to number 12 on the Billboard Hot 100 and becoming the group's first entry on the Modern Rock Tracks chart, it hit number four on the U. S. Hot Dance Music/Club Play chart. "Chains of Love" remains Erasure's highest-charting single in the United States. The song, written by Vince Clarke and Andy Bell, is an uptempo dance-oriented synthpop track with Clarke's signature analogue sound and Bell's lyrics about breaking through any restrictions or stereotypes of what love should be.

The lyrics allude subtly to Bell's desire for wider acceptance of gay couples, his pain evident from the opening lines "How can I explain when there are few words I can choose/How can I explain when words get broken". The chorus is memorable for Bell's use of falsetto; the music video featured Clarke and Bell performing the song while being hoisted through the air by thick, metal chains. Lyrics of this song at MetroLyrics

Tournament sort

Tournament sort is a sorting algorithm. It improves upon the naive selection sort by using a priority queue to find the next element in the sort. In the naive selection sort, it takes O operations to select the next element of n elements. Tournament sort is a variation of heapsort. Tournament replacement selection sorts are used to gather the initial runs for external sorting algorithms. Conceptually, an external file is read and its elements are pushed into the priority queue until the queue is full; the minimum element is pulled from the queue and written as part of the first run. The next input element is read and pushed into the queue, the min is selected again and added to the run. There's a small trick that if the new element being pushed into the queue is less than the last element added to the run the element's sort value is increased so it will be part of the next run. On average, a run will be 100% longer than the capacity of the priority queue. Tournament sorts may be used in N-way merges.

The name comes from its similarity to a single-elimination tournament where there are many players that play in two-sided matches. Each match compares the players, the winning player is promoted to play at match at the next level up; the hierarchy continues. The tournament determines the best player, but the player, beaten in the final match may not be the second best – he may be inferior to other players the winner bested; the following is an implementation of tournament sort in Haskell, based on Scheme code by Stepanov and Kershenbaum. Kershenbaum et al 1988, "Higher Order Imperative Programming"

Seeds We Sow

Seeds We Sow is the sixth solo album by American musician and Fleetwood Mac vocalist-guitarist Lindsey Buckingham, released on September 6, 2011. It is his first to be self-released; the album entered the Billboard 200 in the week of September 24, 2011. By reaching number 45, Seeds We Sow ties with 1984's Go Insane as Buckingham's second most successful album after his 1981 debut Law and Order, it reached number 6 on the Billboard Rock Album Chart and number 5 on the Billboard Independent Albums Chart. The title track was released as a single but failed to chart. All tracks written by Lindsey Buckingham except. "Seeds We Sow" – 3:43 "In Our Own Time" – 4:20 "Illumination" – 2:19 "That's the Way That Love Goes" – 3:56 "Stars Are Crazy" – 4:50 "When She Comes Down" – 4:48 "Rock Away Blind" – 3:57 "One Take" – 3:28 "Gone Too Far" – 3:24 "End of Time" – 3:57 "She Smiled Sweetly" – 2:53 "End of Time" – Amazon MP3 download – 4:12 "Seeds We Sow" – Amazon MP3 download – 3:57 "Sleeping Around the Corner" – iTunes download – 3:33 "Seeds We Sow" was offered as a free download ahead of the album release date, "When She Comes Down" was released in the UK via digital download and "In Our Own Time" and "End of Time" were serviced to radio stations as promotional releases.

The album was released physically on CD as an eleven-track album with an additional three tracks available as a digital download. The album was released as a limited-edition 180-gram red vinyl gatefold 2×LP via Back On Black records. Lindsey Buckingham – vocals, bass guitar, percussion, programming Neale Heywood – bass Walfredo Reyes – drums Brett Tugglekeyboards Kristen Buckingham – sequencing Lindsey Buckingham – performance, mixing, producer Stephen Marcussenmastering Stewart Whitmore – digital editing Nick Steinhardt – design Jeremy Cowart – photography Tom Consolo – management Irving Azoff – management Buckingham Records LLC

Plant Biology (journal)

Plant Biology is a peer-reviewed scientific journal of plant biology. The journal was established as Berichte der Deutschen Botanischen Gesellschaft in 1883, changed its name to Botanica Acta in 1988. In 1999, the journal renamed itself Plant Biology, restarted the volume numbering. Plant Biology is published by John Wiley & Sons on behalf of the German Society for Plant Sciences and the Royal Botanical Society of the Netherlands; the journal is edited by Heinz Rennenberg and J. T. M. Elzenga; the journal is abstracted and indexed in the following bibliographic databases: According to the Journal Citation Reports, the journal has a 2017 impact factor of 2.156, ranking it 70th out of 222 journals in the category "Plant Sciences". Official website