py·rim·i·dine

(pī-rĭm′ĭ-dēn′, pĭ-)

1. A single-ringed, crystalline organic base, C₄H₄N₂, that is the parent compound of a large group of biologically important compounds.

2. Any of a group of substituted derivatives of pyrimidine, including the nitrogen bases uracil, cytosine, and thymine, which are components of nucleic acids. Barbiturates and certain other drugs are also pyrimidines.

[Alteration of pyridine.]

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

pyrimidine

(paɪˈrɪmɪˌdiːn)

1. (Elements & Compounds) a liquid or crystalline organic compound with a penetrating odour; 1,3-diazine. It is a weakly basic soluble heterocyclic compound and can be prepared from barbituric acid. Formula: C4H4N2

2. (Elements & Compounds) Also called: pyrimidine base any of a number of similar compounds having a basic structure that is derived from pyrimidine, including cytosine, thymine, and uracil, which are constituents of nucleic acids

[C20: variant of pyridine]

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

py•rim•i•dine

(paɪˈrɪm ɪˌdin, pɪ-)

n.

1. a heterocyclic compound, C₄H₄N₂, that is the basis of several important biochemical substances.

2. one of several pyrimidine derivatives, esp. the bases cytosine, thymine, and uracil, which are fundamental constituents of nucleic acids.

[1880–85;b. pyridine and imide]

py·rim·i·dine

(pī-rĭm′ĭ-dēn′)

Any of a group of organic compounds having a single ring with alternating carbon and nitrogen atoms. Pyrimidines include the bases cytosine, thymine, and uracil, which are components of nucleic acids.

The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

ThesaurusAntonymsRelated WordsSynonymsLegend:

Noun	1.	pyrimidine - any of several basic compounds derived from pyrimidine alkali, base - any of various water-soluble compounds capable of turning litmus blue and reacting with an acid to form a salt and water; "bases include oxides and hydroxides of metals and ammonia" cytosine, C - a base found in DNA and RNA and derived from pyrimidine; pairs with guanine T, thymine - a base found in DNA (but not in RNA) and derived from pyrimidine; pairs with adenine
	2.	pyrimidine - a heterocyclic organic compound with a penetrating odor organic compound - any compound of carbon and another element or a radical

Translations

pyrimidine

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References in periodicals archive

Fact.MR has announced the addition of the "Pyrimidine Market Forecast, Trend Analysis & Competition Tracking - Global Review 2019 to 2029"report to their offering.

Now Available -- Worldwide Pyrimidine Market Report 2019 to 2029

Summary: Fact.MR has announced the addition of the "Pyrimidine Market Forecast, Trend Analysis & Competition Tracking - Global Review 2019 to 2029"report to their offering.

Pyrimidine Market to Increase at Steady Growth Rate 2019 to 2029

225-227 AdegC; FT-IR (cm-1): 3072 (aromatic C-H stretch.), 2921 (CH3O-), 1737-1647 (C=O carbonyl's), 1598-1550 (C=C and C=N), 740-660 (pyrimidine ring skeleton vib.); 1H-NMR (400 MHz, DMSO): I'= 9.01 (s, 1H, NH), 8.88-6.88 (m, 9H, Ar-H), 3.82-3.73 (s, 6H, 2CH3O-), 2.36 ppm (s, 3H, CH3); 13C-NMR (100 MHz, DMSO): I'= 191.97, 164.10 (C=O), 160.38-114.08 ppm (aromatic carbons), 56.09-55.65 (2CH3O-), 11.73 ppm (CH3-).

Synthesis and DFT Quantum Chemical Calculations of Novel Pyrazolo[1,5-c]pyrimidin-7(1H)-one Derivatives

While synthesizing the chromophores, pyrimidine was also introduced in one of the synthesized chromophores as an appropriate building block in view of its high electron affinity, good planarity, high optical transparency and thermal stability [23-25].

Enhancement of Nonlinear Optical and Thermal Properties of Polyurethanes by Modifying the Chromophores with Fused Heterocyclic and Pyrimidine Rings

Another surprise finding was an increase in levels of purine and pyrimidine, which scientists had not yet linked to fasting.

Fasting boosts metabolism and fights aging

Another surprise finding was an increase in levels of purine and pyrimidine, which scientists had not yet linked to fasting.These chemicals are a sign of increased protein synthesis and gene expression.

Science proves fasting boosts metabolism and fights aging

Tahira Saghir, under the supervision of Prof Dr Shahana Ihsan, completed her research titled 'Solid State Microvawe-Assisted Synthesis And Anticancer Activities Of N-Derivatives Of 5-Halogeno Substituted Pyrimidine'.

UMT produces 1,327 graduates

Phosphatidylcholine (PC), a fundamental brain PL, is synthesized through the Kennedy pathway from three precursors: choline, a pyrimidine, and, typically, a PUFA (either DHA or other PUFA).

Thoughts at Large: Controversies in Clinical Nutrition and Functional Medicine: Issue #10: STILL ANOTHER UNDERAPPRECIATED SUPPLEMENT: DOCOSAHEXAENOIC ACID (DHA)

Ultraviolet portion in sunlight is deleterious to the virus activity as it causes DNA and protein matrix degradations (Bandyopadhyay et al., 1999) by producing two types of pyrimidine dimers; cyclobutane pyrimidine dimers and pyrimidine-pyrimidine 6-4 photoproducts (Friedberg et al., 1995).

The Efficacy and Persistence of Spodoptera littoralis Nucleopolyhedrovirus (SpliMNPV) Applied in UV Protectants against the Beet Armyworm, Spodoptera exigua (Hubner) (Lepidoptera: Noctuidae) under Saudi Field Conditions

The most frequent risk factors related to bacteremia by a VGS were chemotherapy with pyrimidine antagonists (n = 22, 51.2%), severe neutropenia < 500 cell/[mm.sup.3] (n = 19, 46.5%), and steroid use (n = 15, 34.9%).

Microbiology and clinical characteristics of viridans group streptococci in patients with cancer

Formation of cyclobutane pyrimidine dimers at dipyrimidines containing 5-hydroxymethylcytosine.

How Plant Extracts Can Protect Against Photoaging and Skin Cancer