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imidazole

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Journal Article
Published: 01 December 2010
Clays and Clay Minerals (2010) 58 (6): 757–765.
...Motoharu Kawano; Jinyeon Hwang Abstract Guanidine and imidazole are important functional molecules that constitute the side chain of basic amino acids (arginine and histidine); these molecules are capable of interacting with mineral surfaces. However, little information is available about...
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Schematic structures of organic compounds (guanidine, <span class="search-highlight">imidazole</span>, pyrazole, ...
Published: 01 December 2010
Figure 1. Schematic structures of organic compounds (guanidine, imidazole, pyrazole, and pyrrole) used in this study.
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1 s  EELS and NEXAFS spectra of <span class="search-highlight">imidazole</span> (a); 4,5 dicyanoimidazole (b), an...
Published: 01 January 2002
Figure 16. 1 s EELS and NEXAFS spectra of imidazole (a); 4,5 dicyanoimidazole (b), and the EELS spectra of s -trazine (c). Different curves in (a) and (b) correspond to fluorescence yield, electron yield, and EELS (from top to bottom). The hatched lines in each figure are the ionization
Journal Article
Published: 01 January 2005
Reviews in Mineralogy and Geochemistry (2005) 59 (1): 187–210.
..., an intermediate in the polymerization process, that when photolyzed yields a substituted imidazole (Fig. 2 ). This imidazole may also be prepared by the reaction of the HCN tetramer with formamidine. Reaction of the substituted imidazole with HCN generates adenine. A variety of other purines can be prepared...
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Journal Article
Published: 01 October 2019
Clays and Clay Minerals (2019) 67 (5): 450–459.
... of the amorphous silica dissolution with an enhancement factor of ~5.5–6.5 was confirmed in the experiments using the 10.0 mM guanidine and imidazole, which are functional molecules that constitute the side chain of arginine and histidine, respectively. Pyrazole and pyrrole, which are five-membered heterocyclic...
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Spectral features for prebiosignatures as a function of wavelength. The spe...
Published: 01 August 2021
Figure 2. Spectral features for prebiosignatures as a function of wavelength. The species include carbon monoxide (CO), hydrogen sulfide (H 2 S), sulfur dioxide (SO 2 ), imidazole (C 3 N 2 H 4 ), cyanamide (CH 2 N 2 ), cyanoacetylene (HC 3 N), nitric oxide (NO), methane (CH 4 ), acetylene (C 2 H
Journal Article
Published: 01 October 2010
Clays and Clay Minerals (2010) 58 (5): 725.
...) in nontronite NAu-2 Motoharu Kawano and Jinyeon Hwang. Influence of guanidine, imidazole and some heterocyclic compounds on dissolution rates of amorphous silica David M.K. Murphy and Robert J. Gilkes. Clay minerals in saprolite overlying hydrothermally altered and unaltered rocks, Vera epithermal gold...
Journal Article
Journal: Clay Minerals
Published: 01 September 2005
Clay Minerals (2005) 40 (3): 295–302.
... of heterocyclic compounds II . Spectrochimica Acta A , 24 , 1421 – 1429 . Drolet D.P. , Manuta D.M. & Lees A.J. ( 1988 ) FTIR and XPS study of copper(II) complexes of imidazole and benzimidazole . Inorganica Chimica Acta , 146 , 173 – 180 . Fajnor V. & Jesenák...
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Journal Article
Journal: Elements
Published: 01 June 2005
Elements (2005) 1 (3): 145–149.
...=R; a so-called “condensing agent” that induces polymerization reactions). We found a significant yield of both non-biological 2', 5'-linked RNA dimers (see Fig. 3 ) and biologically relevant 3', 5'-linked RNA dimers ( Ferris et al. 1989b ). The use of an imidazole activating group bound...
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Journal Article
Journal: Elements
Published: 01 December 2016
Elements (2016) 12 (6): 401–406.
... important molecules, such as amino acids, glycinamides, and even adenine and imidazole. The addition of formaldehyde (CH 2 O) to the system yields monosaccharides. Using HCN chemistry, nucleotides (i.e. nucleobase + ribose + phosphate), amino acids, and phospholipids can all be synthesized ( Sutherland 2016...
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Journal Article
Published: 02 August 2021
The Canadian Mineralogist (2021) 59 (3): 603–616.
... is identical to the structure reported for the organic compound ( cf . Mootz 1965 , Xu et al . 2011 ). The allantoin molecule ( Fig. 7 ) contains a planar imidazole ring, which is an aromatic five-member ring with two nitrogen atoms at positions 1 and 3 and three carbon atoms. The N atoms in the ring each...
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Journal Article
Published: 01 January 2002
Reviews in Mineralogy and Geochemistry (2002) 49 (1): 485–579.
...Figure 16. 1 s EELS and NEXAFS spectra of imidazole (a); 4,5 dicyanoimidazole (b), and the EELS spectra of s -trazine (c). Different curves in (a) and (b) correspond to fluorescence yield, electron yield, and EELS (from top to bottom). The hatched lines in each figure are the ionization...
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Journal Article
Journal: Elements
Published: 01 August 2021
Elements (2021) 17 (4): 265–270.
...Figure 2. Spectral features for prebiosignatures as a function of wavelength. The species include carbon monoxide (CO), hydrogen sulfide (H 2 S), sulfur dioxide (SO 2 ), imidazole (C 3 N 2 H 4 ), cyanamide (CH 2 N 2 ), cyanoacetylene (HC 3 N), nitric oxide (NO), methane (CH 4 ), acetylene (C 2 H...
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Journal Article
Published: 01 June 2014
Clays and Clay Minerals (2014) 62 (3): 235–242.
... York . Kawano M. Hwang J. ( 2010a ) Enhancement of dissolution rates of amorphous silica by interaction with bovine serum albumin at different pH conditions . Clays and Clay Minerals , 58 , 272 – 279 . Kawano M. Hwang J. ( 2010b ) Influence of guanidine, imidazole...
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Journal Article
Published: 01 April 2009
Clays and Clay Minerals (2009) 57 (2): 161–167.
... + ), and additional basic groups, such as imidazole for His and guanisine groups for Arg, contributing to an increase in the net positive charge on the molecule. The positively charged functional groups, such as NH 3 + , tend to interact electrostatically with the negatively charged >SiO − of the amorphous...
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Journal Article
Published: 01 April 2010
Clays and Clay Minerals (2010) 58 (2): 272–279.
... – Valine 5.96 36 Non-polar – Glycine 5.97 16 Non-polar – Alanine 6.11 46 Non-polar – Proline 6.30 28 Non-polar – Histidine 7.47 17 Imidazole 9.33 Lysine 9.59 59 NH 2 10.54 Arginine 10.76 23 Guanidino 12.48 Figure 4. Concentrations of charged side...
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Journal Article
Published: 01 August 2007
Clays and Clay Minerals (2007) 55 (4): 361–368.
... were confirmed for group II (His, Lys and Arg), i.e. >10 −3 mol for His and ~10 −2 mol for Lys and Arg (Figure 6b ). This is due to the protonation of additional basic groups such as the imidazole, amino and guanisine groups, respectively. These results are in agreement with the rate-enhancing...
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Journal Article
Journal: Elements
Published: 01 June 2021
Elements (2021) 17 (3): 163–168.
... as hydrogen storage materials, forming the basis for a new field of technologically important compounds: the zeolitic imidazolate frameworks. Many neutron diffraction experiments have been carried out on zeolites, revealing details of the hydrogen bonding and showing that the confined H 2 O molecules...
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Journal Article
Published: 01 February 2020
Clays and Clay Minerals (2020) 68 (1): 1–8.
... A. , Barthelet K. , & Pirngruber G. D. ( 2012 ). Separation of C 6 paraffins using zeolitic imidazolate frameworks: comparison with zeolite 5A . Industrial & Engineering Chemistry Research , 51 , 4692 – 4702 . Pu T. M. , Zhao Z. Y. , Guo J. M. , & Lv X. C...
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Journal Article
Published: 01 March 2019
American Mineralogist (2019) 104 (3): 418–424.
...-Wilson , C.M. , and Cheetham , A.K. ( 2012 ) Exceptionally low shear modulus in a prototypical imidazole-based metal-organic framework . Physical Review Letters , 108 , 095502 . Thanh , D.V. , and Lacam , A. ( 1984 ) Experimental study of the elasticity of single crystalline...
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