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Biography
Yuri Raizer
Yuri Raizer was born in 1927 in Kharkov, Ukraine. He graduated from the Leningrad Polytechnic Institute in 1949, and became Doctor of Sciences (Physics and Mathematics) in 1959, full professor in 1968, and Honored Scientist of the Russian Federation in 2002. He was a chief researcher at the Institute for Problems in Mechanics of the Russian Academy of Sciences, and Honored Professor of the Mosco
  • 466
  • 29 Aug 2022
Biography
Yuri Nikolaevich Denisyuk
Yuri Nikolaevich Denisyuk (July 27, 1927 in Sochi — May 14, 2006 in Saint Petersburg) was a Soviet physicist, one of the founders of optical holography. He is known for his great contribution to holography, in particular for the so-called "Denisyuk hologram". He is a full member of the Russian Academy of Sciences (1992; corresponding member since 1970), doctor of physical and mathematical scie
  • 464
  • 29 Dec 2022
Biography
Yuri N. Gnedin
Prof. Dr. Yuri N. Gnedin was an outstanding astrophysicist whose scientific interests and expertise were extraordinarily wide. He was an expert in theoretical investigation of the polarized radiation transfer, generation of high-energy radiation in close binary star systems and galactic nuclei, and cyclotron lines in spectra of accreting neutron stars. Prof. Dr. Yuri N. Gnedin developed the pion
  • 767
  • 20 Dec 2022
Topic Review
Yuktibhāṣā
Yuktibhāṣā (Malayalam: യുക്തിഭാഷ, lit. 'Rationale'), also known as Gaṇita-yukti-bhāṣā:xxi and Gaṇitanyāyasaṅgraha (Compendium of Astronomical Rationale), is a major treatise on mathematics and astronomy, written by the India n astronomer Jyesthadeva of the Kerala school of mathematics around 1530. The treatise, written in Malayalam, is a consolidation of the discoveries by Madhava of Sangamagrama, Nilakantha Somayaji, Parameshvara, Jyeshtadeva, Achyuta Pisharati, and other astronomer-mathematicians of the Kerala school. It also exists in a Sanskrit version, with unclear author and date, composed as a rough translation of the Malayalam original. The work contains proofs and derivations of the theorems that it presents. Modern historians used to assert, based on the works of Indian mathematics that first became available, that early Indian scholars in astronomy and computation lacked in proofs, but Yuktibhāṣā demonstrates otherwise. Some of its important topics include the infinite series expansions of functions; power series, including of π and π/4; trigonometric series of sine, cosine, and arctangent; Taylor series, including second and third order approximations of sine and cosine; radii, diameters and circumferences; and tests of convergence. Yuktibhāṣā mainly gives rationale for the results in Nilakantha's Tantra Samgraha. It is considered an early text on the ideas of calculus, predating Newton and Leibniz by centuries. The treatise was largely unnoticed outside India, as it was written in the local language of Malayalam. In modern times, due to wider international cooperation in mathematics, the wider world has taken notice of the work. For example, both Oxford University and the Royal Society of Great Britain have given attribution to pioneering mathematical theorems of Indian origin that predate their Western counterparts.
  • 724
  • 21 Nov 2022
Topic Review
Yukon Wolf
The North American wolf Canis lupus pambasileus is a subspecies of gray wolf that is called the Yukon wolf in Canada and the Alaskan Interior wolf in the United States. It is native to the Alaska Interior and Yukon, save for the tundra region of the Arctic Coast.
  • 1.2K
  • 08 Oct 2022
Biography
Yuko Tojo
Yuko Tojo (東條 由布子, Tōjō Yūko, May 20, 1939 (Keijo, Japanese Korea) – February 13, 2013, Tokyo, Japan) was a Japanese ultra-nationalist politician, Imperial Japanese apologist, and brief political hopeful.[1] She was the granddaughter of General Hideki Tōjō, the Japanese wartime prime minister who was convicted of planning and orchestrating most of the major Japanese acts of aggr
  • 840
  • 20 Dec 2022
Topic Review
Yucca schidigera in Aquaculture
In modern aquaculture systems, farmers are increasing the stocking capacity of aquatic organisms to develop the yield and maximize water resources utilization. However, the accumulation of ammonia in fishponds regularly occurs in intensive aquaculture systems, resulting in reduced growth rates and poor health conditions. The inclusion of yucca extract is recognized as a practical solution for adsorbing the waterborne ammonia. Yucca has abundant amounts of polyphenolics, steroidal saponins, and resveratrol and can be used as a solution or as a powder.
  • 2.4K
  • 06 Mar 2021
Topic Review
Yucca Saponins. Bioactivity and analytical methods
Yucca is one of the main sources of steroidal saponins, hence different extracts are commercialized for use as surfactant additives by beverage, animal feed, cosmetics or agricultural products. For a deeper understanding of the potential of the saponins that can be found in this genus, an exhaustive review of the structural characteristics, bioactivities and analytical methods that can be used with these compounds has been carried out, since there are no recent reviews on the matter. Thus, a total of 108 saponins from eight species of the genus Yucca have been described.
  • 794
  • 08 Oct 2021
Topic Review
YUC in Plant Developmental Processes
The YUC gene family encodes the rate-limiting enzymes in the TAA/YUC pathway, which stands as the primary endogenous auxin biosynthesis pathway in plants. YUC-medicated local auxin biosynthesis is important for establishing auxin gradient within cells/tissues and precisely regulating various major developmental processes such as root development, leaf morphogenesis, and reproductive development. The spatiotemporal expressions of different YUC genes enable function specialization across different plant species.
  • 2.9K
  • 23 Oct 2020
Topic Review
Yuan-Harel-Lupski Syndrome
Yuan-Harel-Lupski (YUHAL) syndrome is a rare neurological condition that has a combination of features of two other disorders, Potocki-Lupski syndrome and type 1A Charcot-Marie-Tooth disease.  
  • 823
  • 24 Dec 2020
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