Sinistral and dextral, in some scientific fields, are the two types of chirality ("handedness") or relative direction. The terms are derived from the Latin words for "left" (sinister) and "right" (dexter). Other disciplines use different terms (such as dextro- and laevo-rotary in chemistry, or clockwise and anticlockwise in physics) or simply use left and right (as in anatomy).
Relative direction and chirality are distinct concepts. Relative direction is from the point of view of the observer; a completely symmetric object has a left side and a right side, from the observer's point of view, if the top and bottom and direction of observation are defined. Chirality, however, is observer-independent: no matter how one looks at a right-hand screw thread, it remains different from a left-hand screw thread. Therefore, a symmetric object has sinistral and dextral directions arbitrarily defined by the position of the observer, while an asymmetric object that shows chirality may have sinistral and dextral directions defined by characteristics of the object, regardless of the position of the observer.
Because the coiled shells of gastropods are asymmetric, they possess a quality called chirality–the "handedness" of an asymmetric structure.
Over 90%[1] of gastropod species have shells in which the direction of the coil is dextral (right-handed). A small minority of species and genera have shells in which the coils are almost always sinistral (left-handed). Very few species show an even mixture of dextral and sinistral individuals (for example, Amphidromus perversus).[2]
The most obvious characteristic of flatfish, other than their flatness, is their asymmetric morphology: both eyes are on the same side of the head in the adult fish. In some families of flatfish, the eyes are always on the right side of the body (dextral or right-eyed flatfish), and in others, they are always on the left (sinistral or left-eyed flatfish). Primitive spiny turbots include equal numbers of right- and left-sided individuals, and are generally more symmetric than other families.[3]
In geology, the terms sinistral and dextral refer to the horizontal component of the movement of blocks on either side of a fault or the sense of movement within a shear zone. These are terms of relative direction, as the movement of the blocks is described relative to each other when viewed from above. Movement is sinistral (left-handed) if the block on the other side of the fault moves to the left, or if straddling the fault the left side moves toward the observer. Movement is dextral (right-handed) if the block on the other side of the fault moves to the right, or if straddling the fault the right side moves toward the observer.[4]
Kota Lusail مدينة لوسيلAtas ke Bawah, Kiri ke Kanan: Pemandangan konstruksi di pinggir jalan, Pemandangan distrik Al Kharayej dari Al Khor Expressway, Skyline dengan Lusail Marina Iconic [sic] Pembangunan di tengah, Lusail Interchange Arch, Kapal berlabuh Lusail MarinaNegara QatarKotamadyaAl DaayenZonaZona 69, Zona 70Distrik no.123Luas • Total38 km2 (15 sq mi)Ketinggian[1]5 m (16 ft)Populasi • Total250.000 (plann…
هذه المقالة بحاجة لصندوق معلومات. فضلًا ساعد في تحسين هذه المقالة بإضافة صندوق معلومات مخصص إليها. التعلم المتمركز حول الطالب (يُعرف أيضًا باسم التعلم المتمركز حول المُتعلم)، وهو مفهوم متضمن لمجموعة واسعة من طرائق التدريس التي تحول تركيز العملية التدريسية من المعلم إلى الط
سفارة الإكوادور في السويد الإكوادور السويد الإحداثيات 59°19′51″N 18°04′11″E / 59.330972222222°N 18.069722222222°E / 59.330972222222; 18.069722222222 البلد السويد المكان ستوكهولم تعديل مصدري - تعديل سفارة الإكوادور في السويد هي أرفع تمثيل دبلوماسي[1] لدولة الإكوادور لدى السويد.[2][…
1953 film by Delmer Daves For the 2010 dystopian tragedy, see Never Let Me Go (2010 film). Never Let Me GoTheatrical release posterDirected byDelmer DavesScreenplay byGeorge FroeschelRonald MillarBased onCame the Dawn1949 novelby Roger BaxProduced byClarence BrownStarringClark GableGene Tierney Bernard MilesCinematographyRobert KraskerEdited byFrank ClarkeMusic byHans MayProductioncompanyMetro-Goldwyn-MayerDistributed byMetro-Goldwyn-MayerRelease dates 18 March 1953 (1953-03-18)…
Міжнародний конкурс імені Йоганна Себастьяна Баха Названо на честь Йоганн Себастьян Бах Країна Німеччина Категорія лауреатів нагороди Категорія:Лауреати міжнародного конкурсу імені Йоганна Себастьяна Баха Міжнародний конкурс імені Йоганна Себастьяна Баха (нім. Intern…
Wikimedia Commons has media related to Museums in Iowa. This list of museums in Iowa is a list of museums, defined for this context as institutions (including nonprofit organizations, government entities, and private businesses) that collect and care for objects of cultural, artistic, scientific, or historical interest and make their collections or related exhibits available for public viewing. Museums that exist only in cyberspace (i.e., virtual museums) are not included. Museums To use the sor…
Pour les articles homonymes, voir Léopold II. Léopold II Le roi Léopold II en tenue de chevalier de l'ordre de la Jarretière, vers 1891. Titre Roi des Belges 17 décembre 1865 – 17 décembre 1909 (44 ans) Premier ministre Charles Rogier Walthère Frère-Orban Jules d'Anethan Jules Malou Walthère Frère-Orban Jules Malou Auguste Beernaert Jules de Burlet Paul de Smet de Naeyer Jules Vandenpeereboom Paul de Smet de Naeyer Jules de Trooz François Schollaert Prédécesseu…
Greek musical duo AntiqueOriginGothenburg, SwedenGenresLaïko, EurodanceYears active1999–2003 2019, 2022–presentLabelsV2, Bonnier, Virgin Schallplatten, KA, Urban, Popular, Minos EMIMembersHelena PaparizouNikos Panagiotidis Antique is a Greek singing duo consisting of Helena Paparizou (Έλενα Παπαρίζου; born 1982) and Nikos Panagiotidis (Νίκος Παναγιωτίδης; born 1978), originating from Sweden and combining Greek popular music and lyrics with a Nordic dance-pop b…
Sebuah holotipe dengan label jenis merah Holotipe Marocaster coronatus, MHNT Holotipe adalah sebuah contoh fisik tunggal (atau ilustrasi) dari sebuah organisme, yang diketahui dipakai saat spesies (atau taxon berperingkat rendah) resmi dideskripsikan. Ini adalah contoh fisik tunggal (atau ilustrasi) atau salah satu dari beberapa hal semacam itu, tetapi secara khusus disebut sebagai holotipe. Referensi Pranala luar Wikimedia Commons memiliki media mengenai Holotypes. BOA Photographs of type speci…
Halaman ini berisi artikel tentang orang Punik. Untuk bahasa Punik, lihat Bahasa Punik. Untuk peradaban, lihat Kartago Kuno. Patung orang Punik sedang berdoa, sekitar abad ke-3 SM Punik atau Kartago adalah sekumpulan suku bangsa di Mediterania Barat yang berlatar belakang belasteran Berber dan Foenisia. Mereka meliputi para penduduk Kartago Kuno (sekarang Tunis), serta orang-orang yang memiliki pemukiman dengan pemimpin Kartago lainnya di Afrika Utara, barat Sisilia, selatan Sardinia, Malta, Ebu…
For related races, see 1982 United States gubernatorial elections. 1984 Arkansas gubernatorial election ← 1982 November 6, 1984 1986 → Nominee Bill Clinton Woody Freeman Party Democratic Republican Popular vote 554,561 331,987 Percentage 62.55% 37.45% County results Clinton: 50–60% 60–70% 70–80% 80–90% Freeman: &…
Northford Ice PavilionThe NIPLocation24 Fire-Lite Plaza, Northford, ConnecticutOperatorNorthford Ice Pavilion LLCCapacity1,200 (Red Rink)Surface200×85 feet (3 rinks)Opened1999TenantsConnecticut Whale (PHF) (2016–2017)Quinnipiac Bobcats (ECAC Hockey) (1999–2007)Websitenorthfordice.com Northford Ice Pavilion is an American ice skating complex, located in the Northford area of North Branford, Connecticut. It hosts a number of high school ice hockey teams.[1] The arena formerly …
Sports team season 2022–23 Michigan State Spartans men's ice hockey seasonConference5th Big TenHome iceMunn Ice ArenaRankingsUSCHO#17USA Today#19RecordOverall18–18–2Conference10–12–2Home11–5–1Road7–9–1Neutral0–3–0Coaches and captainsHead coachAdam NightingaleAssistant coachesJared DeMichielMike TownsCaptain(s)Miroslav MuchaAlternate captain(s)Christian KrygierCole KrygierNash NienhuisMichigan State Spartans men's ice hockey seasons« 2021–22 2023–24 » The …
This article includes a list of general references, but it lacks sufficient corresponding inline citations. Please help to improve this article by introducing more precise citations. (June 2008) (Learn how and when to remove this template message) VIA OpenBookDeveloperVIA TechnologiesRelease dateMay 27, 2008 (2008-05-27)PredecessorNanoBookWebsiteweb.archive.org/web/20100329072842/http://www.viaopenbook.com/ VIA OpenBook is a laptop reference design from VIA Technologies, announced…
Australian heavyweight boxer and footballer For the British Olympic rower, see Bill Lang (rower). Bill LangBornWilliam Lanfranchi(1882-07-06)6 July 1882Carlton, VictoriaDied3 September 1952(1952-09-03) (aged 70)St Kilda East, VictoriaNationalityAustralianBoxing careerStatisticsWeight(s)HeavyweightHeight185 cm (6 ft 1 in)Reach185 cm (73 in)StanceOrthodox Boxing recordTotal fights43Wins27Wins by KO21Losses15Draws1No contests1 Australian rules footballer Australian rul…
Nigerian record chart TurnTable chartsPredecessorPlaydata chartsFormation3 July 2020; 3 years ago (2020-07-03)FounderAyomide OriowoSimiloluwa AdegokeFounded atLagos, NigeriaKey peopleOye Akideinde (Executive)Bizzle Osikoya (Executive)Parent organizationTurnTableWebsitewww.turntablecharts.com TurnTable charts is a catalog of relative weekly, and yearly popular songs in Nigeria. The results are published in TurnTable magazine. TurnTable provides additional weekly charts, as well …
Canadian actor and musician (born 2002) Finn WolfhardWolfhard at the 2017 San Diego Comic-ConBorn (2002-12-23) December 23, 2002 (age 20)[1]Vancouver, British Columbia, CanadaOccupationsActormusiciandirectorscreenwriterYears active2013–presentMusical careerGenresAlternative rockindie rockInstrument(s)VocalsguitarpianobassYears active2017–presentLabelsAWALRoyal MountainparadYseTransgressiveMember ofThe AubreysFormerly ofCalpurnia Musical artist Finn Wolfhard (born December 2…
Indian TV series or programme MatrudevobhavaGenreDrama FamilyCreated byPadmini NadellaWritten byGopi Venkat (dialogues)Screenplay byBalabhadrapatruni RamaniDirected byMouliStarringPravaleeka Raja Sridhar Sainath Srilakshmi Nalini Mounika RavikanthTheme music composerJosya BhatlaOpening themeMathrudevobhava Nakul Abhaykar (vocals) lyrics Ramajogayya Sastry BhuvanachandraCountry of originIndiaOriginal languageTeluguNo. of seasons1No. of episodes553ProductionExecutive producerNandhana NadellaP…
У этого термина существуют и другие значения, см. Первомайское сельское поселение. сельское поселениеПервомайское сельское поселение Флаг 46°28′35″ с. ш. 39°34′27″ в. д.HGЯO Страна Россия Входит в Кущёвский район Включает 8 населённых пунктов Адм. центр посёлок Пе…
يفتقر محتوى هذه المقالة إلى الاستشهاد بمصادر. فضلاً، ساهم في تطوير هذه المقالة من خلال إضافة مصادر موثوق بها. أي معلومات غير موثقة يمكن التشكيك بها وإزالتها. (ديسمبر 2018) شافي روح الاسم الرسمي شافي روح الإحداثيات 35°13′12″N 36°1′41″E / 35.22000°N 36.02806°E / 35.22000; 36.02806 تقسيم إد…
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