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  2. 2024 ATP Tour - Wikipedia

    en.wikipedia.org/wiki/2024_ATP_Tour

    The 2024 ATP Tour was the global elite men's professional tennis circuit organized by the Association of Tennis Professionals (ATP) for the 2024 tennis season. The 2024 ATP Tour calendar comprises the Grand Slam tournaments, supervised by the International Tennis Federation (ITF), the ATP Finals, the ATP Masters 1000, the United Cup (organized with the WTA), the ATP 500 series and the ATP 250 ...

  3. ATP rankings - Wikipedia

    en.wikipedia.org/wiki/ATP_rankings

    [4] The ATP's new ranking system was quickly adopted by men's tennis. [5] While virtually all ATP members were in favor of objectifying event participation, the system's first No. 1, Ilie Năstase, lamented that "everyone had a number hanging over them", fostering a more competitive and less collegial atmosphere among the players. [6]

  4. List of deadliest aircraft accidents and incidents - Wikipedia

    en.wikipedia.org/wiki/List_of_deadliest_aircraft...

    The US Code of Federal Regulations defines an accident as "an occurrence associated with the operation of an aircraft, which takes place between the time any person boards the aircraft with the intention of flight and all such persons have disembarked, and in which any person suffers death or serious injury, or in which the aircraft receives substantial damage;" an incident as "an occurrence ...

  5. Creatine - Wikipedia

    en.wikipedia.org/wiki/Creatine

    Creatine (/ ˈ k r iː ə t iː n / or / ˈ k r iː ə t ɪ n /) [1] is an organic compound with the nominal formula (H 2 N)(HN)CN(CH 3)CH 2 CO 2 H.It exists in various tautomers in solutions (among which are neutral form and various zwitterionic forms).

  6. Peroxisome - Wikipedia

    en.wikipedia.org/wiki/Peroxisome

    Basic structure of a peroxisome Distribution of peroxisomes (white) in HEK 293 cells during mitosis Peroxisome in rat neonatal cardiomyocyte. A peroxisome (/ p ə ˈ r ɒ k s ɪ ˌ s oʊ m /) [1] is a membrane-bound organelle, a type of microbody, found in the cytoplasm of virtually all eukaryotic cells.

  7. Pregnancy - Wikipedia

    en.wikipedia.org/wiki/Pregnancy

    The second trimester is defined as starting, between the beginning of week 13 (12 weeks +0 days of GA) [4] and beginning of week 15 (14 weeks + 0 days of GA). [37] It ends at the end of week 27 (26 weeks + 6 days of GA) [ 37 ] or end of week 28 (27 weeks + 6 days of GA).

  8. Artificial cardiac pacemaker - Wikipedia

    en.wikipedia.org/wiki/Artificial_cardiac_pacemaker

    Percussive pacing, also known as transthoracic mechanical pacing, is the use of the closed fist, usually on the left lower edge of the sternum over the right ventricle in the vena cava, striking from a distance of 20 – 30 cm to induce a ventricular beat (the British Journal of Anaesthesia suggests this must be done to raise the ventricular pressure to 10–15 mmHg to induce electrical activity).