1-20 OF 34 RESULTS FOR

pyrimidines

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
×Close Modal
Sort by
Journal Article
Published: 01 June 1969
American Mineralogist (1969) 54 (5-6): 858-868.
...T. D. Thompson; G. W. Brindley Abstract Absorptions of various purines, pyrimidines and nucleosides from aqueous solutions by Na-, Mg-, and Cu(II)-saturated illite have been measured in the pH range 2-10. Illite from Skytop, Pennsylvania, was treated to remove organic and F e-hydroxy contaminants...
Image
Influence of UV treatment on DNA damage quantified as cyclobutane <b>pyrimidin</b>...
in > Geology
Published: 01 December 2015
Figure 3. Influence of UV treatment on DNA damage quantified as cyclobutane pyrimidine dimer photoproducts (CPD prod.) for photoferrotrophic strains of bacteria Rhodopseudomonas palustris TIE-1 (A) and Rhodobacter ferrooxidans SW2 (B). Relative production of CPD in DNA extracts of cultures
Image
Activated nucleotide monomers where B is a purine or <b>pyrimidine</b> base. (a) n...
Published: 01 January 2005
Figure 5. Activated nucleotide monomers where B is a purine or pyrimidine base. (a) nucleoside 5′-phosphorimidazolide (ImpB), (b) nucleoside 5′-phosphoro-2-methylimidazolide (2-MeImpB), (c) nucleoside 5′-phosphoro-1-methyladenium (1-MeadpB), (d) α- nucleoside 5′-phosphorimidazolide (α-ImpB).
Journal Article
Journal: AAPG Bulletin
Published: 01 May 1963
AAPG Bulletin (1963) 47 (5): 777-803.
... and heteroaromatic substances are widespread in the Jurassic samples studied. Among the substances possibly represented are: anthracene, naphthalene, pyridines, quinolinic acid, pyrazine, aniline, pyrimidine, purine, and several possible polycyclic aromatic hydrocarbons. Of these, anthracene and the pyridines occur...
Image
The routes by which three of the nucleobases—thymine (T) at bottom left; ur...
in > Elements
Published: 01 April 2018
Figure 4 The routes by which three of the nucleobases—thymine (T) at bottom left; uracil (U) at bottom center; and cytosine (C) at right center—can be formed by the irradiation of an ice containing the N -heterocycle pyrimidine “[Py]” (top center).
Image
Chemical structure of amino acids (α-, β-, γ-, etc.), carboxylic acids, nuc...
in > Elements
Published: 01 February 2011
F igure 2 Chemical structure of amino acids (α-, β-, γ-, etc.), carboxylic acids, nucleobases (purines, which are two-ring N-containing heterocyclic compounds, and pyrimidines, which are one-ring N-containing heterocyclic compounds), and hydrocarbons (aliphatic and aromatic). R1, R2, R3 and R4
Image
Chromosomal DNA, DNA double helix, genes. The top part of this figure gives...
Published: 03 January 2003
Figure 2. Chromosomal DNA, DNA double helix, genes. The top part of this figure gives the basic “building blocks” of nucleic acids, i.e., the nucleotides, and their elementary components, the ribose (or deoxyribose) sugar units and purine/pyrimidine bases. The carbon numbering scheme for ribose
Journal Article
Published: 01 January 2005
Reviews in Mineralogy and Geochemistry (2005) 59 (1): 187-210.
...Figure 5. Activated nucleotide monomers where B is a purine or pyrimidine base. (a) nucleoside 5′-phosphorimidazolide (ImpB), (b) nucleoside 5′-phosphoro-2-methylimidazolide (2-MeImpB), (c) nucleoside 5′-phosphoro-1-methyladenium (1-MeadpB), (d) α- nucleoside 5′-phosphorimidazolide (α-ImpB). ...
FIGURES | View All (12)
Journal Article
Journal: Elements
Published: 01 June 2005
Elements (2005) 1 (3): 145-149.
... a plausible prebiotic synthesis of the monomers or polymers of a potential pre-RNA. The building blocks of RNA ( T able 1 ; F ig . 3 ), consist of a sugar molecule (ribose, C 5 H 10 O 5 ), a phosphate group (PO 4 ), and one of four bases (the one-ring pyrimidines cytosine and uracil, designated C and U...
FIGURES | View All (6)
Journal Article
Published: 01 December 2004
Clays and Clay Minerals (2004) 52 (6): 742-748.
... sulfonylurea herbicides on clays. In our case, the asymmetric stretching frequency of the SO 2 groups was shifted from 1354 to 1348 cm −1 due to adsorption. Ukrainczyk and Ajwa (1996) reported that primisulfuron adsorption on mineral surfaces involves the two difluoromethoxy substituents on the pyrimidine...
FIGURES | View All (7)
Journal Article
Journal: Clay Minerals
Published: 01 December 2010
Clay Minerals (2010) 45 (4): 469-475.
... characteristics, clay minerals can adsorb a wide range of organic molecules, and catalyse their polymerization ( Theng, 1974 ; Ferris, 2005 ; Theng & Yuan, 2008 ). Clay minerals in the prebiotic Earth might have served as a host for amino acids, purines, and pyrimidines, concentrating these molecules...
FIGURES | View All (7)
Journal Article
Journal: Elements
Published: 01 February 2011
Elements (2011) 7 (1): 35-40.
...F igure 2 Chemical structure of amino acids (α-, β-, γ-, etc.), carboxylic acids, nucleobases (purines, which are two-ring N-containing heterocyclic compounds, and pyrimidines, which are one-ring N-containing heterocyclic compounds), and hydrocarbons (aliphatic and aromatic). R1, R2, R3 and R4...
FIGURES | View All (7)
Journal Article
Published: 01 December 2006
Journal of the Geological Society (2006) 163 (6): 897-900.
... a ) and even in kerogen 140 Ma old ( Mongenot et al . 2001 ), where preservation of labile moieties was facilitated by encapsulation within a resistant aliphatic matrix. The presence of diketodipyrrole and pyrimidine in the periderm of Rhabdopleura is diagnostic of collagen ( Stankiewicz et al . 1997...
FIGURES
Journal Article
Published: 01 March 2018
American Mineralogist (2018) 103 (3): 341-342.
... , M.W. , Gerland , B. , and Sutherland , J.D. ( 2009 ) Synthesis of activated pyrimidine ribonucleotides in prebiotically plausible conditions . Nature , 459 , 239 – 242 . Reeder , R.J. (Ed.) ( 1983 ) Carbonates: Mineralogy and Chemistry , vol. 11 . Reviews in Mineralogy...
Journal Article
Journal: Geology
Published: 01 December 2015
Geology (2015) 43 (12): 1067-1070.
...Figure 3. Influence of UV treatment on DNA damage quantified as cyclobutane pyrimidine dimer photoproducts (CPD prod.) for photoferrotrophic strains of bacteria Rhodopseudomonas palustris TIE-1 (A) and Rhodobacter ferrooxidans SW2 (B). Relative production of CPD in DNA extracts of cultures...
FIGURES
Journal Article
Published: 01 August 2009
Vadose Zone Journal (2009) 8 (3): 677-689.
... with single labeling of the pyrimidine ring and 12 C-SDZ were administered to pigs in a ratio of 1:19. The specific radioactivity of SDZ in manure was 0.44 MBq mg −1 . After dosing, manure was collected, mixed, and stored at 4°C...
FIGURES | View All (7)
Journal Article
Journal: Clay Minerals
Published: 01 December 2011
Clay Minerals (2011) 46 (4): 613-619.
... gradient at the initial stage. However, they reached equilibrium after adsorption of 274 mg dFdU.HCl/g FAU and 79.7 mg DACH-Pt/g FAU, respectively. dFdU.HCl is a pyrimidine nucleoside ( Fig. 1a ) which belongs to a general group of chemotherapy drugs known as antimetabolites. It inhibits cells from...
FIGURES | View All (6)
Journal Article
Journal: Elements
Published: 01 October 2013
Elements (2013) 9 (5): 367-372.
..., such as pyrimidine. The current Martian atmosphere contains only 0.2 mbar N 2 . Even with this lowered atmospheric concentration, it has been postulated that there is enough biologically available N in the form of HNO 3 in the subsurface to support a limited microbial population ( Boxe et al. 2012 ). Steele et...
FIGURES | View All (4)
Series: The Micropalaeontological Society, Special Publications
Published: 01 January 2013
DOI: 10.1144/TMS5.23
EISBN: 9781862396500
... eukaryotic metabolic pathways and cellular processes. For example, we have found evidence for glycolysis/gluconeogenesis, the TCA cycle, the pentose phosphate pathway, fatty acid metabolism, purine/ pyrimidine metabolism, several different amino acids, RNA transport (including nuclear pore proteins), mRNA...
Journal Article
Journal: Elements
Published: 01 December 2016
Elements (2016) 12 (6): 401-406.
... acids by hydrolysis and oxidation (McCollum 2013). Unlike amino acids, the synthesis of purines and pyrimidines has not been achieved in experiments simulating atmospheric synthesis. Life was not formed in one step. Rather, life was formed as a sequence of physico-chemical processes that caused...
FIGURES | View All (4)