All articles starting with R

Ras Laffan B power plant

Ras Laffan B (محطة رأس لفان "ب") is a 1,025 MW gas-fired power and desalination plant in Ras Laffan, Qatar, owned by Qatar Power and opened in 2008.

Ras Laffan C power plant

Ras Laffan C, also called Ras Girtas, is a power and desalination plant in Ras Laffan, Qatar, supplying about 30 percent of the country's electricity.

Ras Mala

Ras Mala (રાસમાલા) is a history of Gujarat written in English by the British official Alexander Kinloch Forbes and published in London in 1856 in two volumes.

Sep 17, 2026

Ras malai (रस मलाई, rosh malai) is a chilled South Asian dessert of chhena cheese patties cooked in sugar syrup and soaked in thickened cardamom-saffron milk; origin is claimed by K.C. Das of Kolkata and by Comilla's Matri Bhandar.

Sep 17, 2026

RAS syndrome

RAS syndrome, or Redundant Acronym Syndrome syndrome, is the humorous term coined by New Scientist in 2001 for redundant phrases like "PIN number" and "ATM machine", where a word inside an acronym or initialism is repeated alongside it.

Ras Tanura Refinery

The Ras Tanura Refinery is a 550,000-barrel-per-day crude oil refinery on Saudi Arabia's Persian Gulf coast, owned and operated by Saudi Aramco and the largest refinery in Saudi Arabia.

RAS-associated autoimmune leukoproliferative disease

RAS-associated autoimmune leukoproliferative disease (RALD, ALPS type IV) is a rare nonmalignant blood disorder caused by somatic KRAS or NRAS gain-of-function mutations, causing monocytosis, splenomegaly, and autoimmune cytopenias, distinguished from JMML by its indolent course.

Ras-related protein Rab-23

Ras-related protein Rab-23 (RAB23) is a human Rab-family small GTPase, 237 amino acids, on chromosome 6p12.1-p11.2, regulating membrane trafficking, Hedgehog signaling, and primary cilia; loss-of-function causes Carpenter syndrome.

Ras-related protein Rap2

Ras-related protein Rap2 (Rap2A, Rap2B, Rap2C): Rap subfamily small GTPases of the Ras superfamily, 60% identical to Rap1, cycling between GTP- and GDP-bound states; Rap2B, found in 1990 platelets, regulates cytoskeleton, Hippo signaling, and cancer.

Ras-related protein Rsr1

Ras-related protein Rsr1, also called Bud1 (RSR1/BUD1, YGR152C), is a 272-amino-acid Ras-family GTPase of budding yeast that selects the bud site by cycling between GTP-bound (Cdc24, Cdc42 binding) and GDP-bound (Bem1 binding) states, regulated by the GEF Bud5 and the GAP Bud2.

Rasa

Rasa is a conversational AI company founded in Berlin in 2016 by Alex Weidauer and Alan Nichol, providing open-source and commercial tools for building AI assistants and agents.

Rasa (software)

Rasa is an open-source, self-hostable platform for building conversational AI assistants and agents, released as Python libraries in 2016 and now built around its CALM dialogue system.

Sep 17, 2026

Rasa (रस) (aesthetics)

Rasa (रस), Sanskrit for juice or essence, is the foundational category of Indian aesthetics: the aestheticised emotion produced in spectators via the Natyashastra's rasa sutra, eight or nine rasas, and Abhinavagupta's commentary tradition.

Rasa Lila

Rasa Lila (रासलीला, also Raslila) is a devotional dance-drama of northern India whose central episode is Krishna's circular night dance with the gopis of Braj.

Rasa Parpati

Rasa Parpati (Rasa Parpaṭī) is an Ayurvedic mercury-sulphur medicine of the Parpati ('flake') class in Rasashastra, made by pouring molten Kajjali on banana leaves; used mainly for Grahani and gastrointestinal disorders, with an Ayurvedic Formulary of India monograph.

Rasa'il

Rasa'il (رسائل, singular risala) are the literary letters and epistles of classical Arabic prose, composed in polished language for state business, friendship, or learned discussion.

Rasa'il al-Jahiz

Rasa'il al-Jahiz (رسائل الجاحظ) is the surviving corpus of over forty essays by the Abbasid prose writer al-Jahiz (died 868), spanning adab, Mu'tazili theology, politics, and biology.

Sep 23, 2026

Rasa'il al-Qadi al-Fadil

Rasa'il al-Qadi al-Fadil (رسائل القاضي الفاضل) is the collected official and private correspondence of al-Qadi al-Fadil, Saladin's chancery chief, counselor, and financier, regarded as a key source for Ayyubid history.

Sep 24, 2026

Rasa'il of Abd al-Hamid al-Katib

The Rasa'il of Abd al-Hamid al-Katib (رسائل عبد الحميد الكاتب) are the surviving chancery epistles of Abd al-Hamid b. Yahya, chief secretary of the last Umayyad caliph, Marwan II.

RASA1-related capillary malformation-arteriovenous malformation

RASA1-related capillary malformation-arteriovenous malformation (CM-AVM1, OMIM 608354) is a rare autosomal dominant RASopathy causing multiple pink capillary malformations with a pale halo, with AVMs or AVFs in about a quarter of carriers.

Rasagangadhara

Rasagangadhara is a 17th-century Sanskrit treatise on poetics by Jagannatha Panditaraja, composed between 1641 and 1650 and covering poetic theory from rasa to figures of speech.

Rasagiline

Rasagiline (Azilect) is a selective, irreversible MAO-B inhibitor drug approved for Parkinson's disease, first approved in Israel and Europe in 2005 and by the US FDA in 2006.

Rasahrdayatantra

Rasahṛdayatantra (रसहृदयतन्त्र), the Heart of Mercury, is a 10th-century Sanskrit alchemical text by Govinda, the earliest known rasaśāstra work: 506 verses, 19 chapters, eighteen mercury saṃskāras, and an elixir regimen.

Sep 23, 2026

Rasail Ikhwan al-Safa

Rasail Ikhwan al-Safa is an encyclopedia of 52 epistles on the sciences, written in ninth- and tenth-century Iraq, mainly Basra and Baghdad, by a secret fraternity of philosophically trained literati.

Rasakallola

Rasakallola is a medieval Odia chhanda kavya by Dinakrushna Das, composed in the Riti era, narrating the divine life of Krishna and his love for Radha.

Oct 20, 2026

Rasakarpura

Rasakarpura (Rasakarpūra, Raskarpur) is a classical Ayurvedic Nirgandha Kupipakva mercurial preparation, a white sublimate of mercuric chloride (HgCl2) made from mercury, sulphuric acid, and rock salt, used for skin diseases and antimicrobial purposes but highly toxic.

Rasamanikya

Rasamanikya (रसमाणिक्य), also called Rasa Manikya, is an Ayurvedic arsenical formulation of purified Haratala (orpiment, As2S3), ruby-red in color, used for skin and respiratory disorders; animal and pilot human studies report safety at therapeutic doses.