scholarly journals Beginning of Life on Planets

2019 ◽  
Vol 11 (1) ◽  
pp. 8
Author(s):  
Abdul L. Bhuiyan
Keyword(s):  
Heterocyclic Bases

Beginning of life on a planet including earth would occur with the formation of nucleotides from such precursors as linear polyphosphate anion, D-ribose, and heterocyclic bases in presence of metasilicate anion of composition (SiO32-)n, metaborate anion of composition (BO2)nn-, and enstatite (MgSiO3). These complex silicates and borates might have acted as catalysts as well as moulds for the production of the nucleotides of DNA/RNA.

The Isolation of Saturated Heterocyclic Bases from Tobacco Smoke / Isolierung von gesättigten heterocyclischen Basen aus dem Tabakrauch

1965 ◽  
Vol 3 (2) ◽  
Author(s):  
G. Neurath ◽  
B. Pirmann ◽  
M. Duenger
Keyword(s):  
Tobacco Smoke ◽  
Heterocyclic Bases

AbstractThe cyclic bases piperidine, pyrrolidine and 2-methyl-pyrrolidine were isolated and identified from the smoke of cigarettes with a high bases content

Synthesis and Biological Effects of N-(2-Phosphonomethoxyethyl) Derivatives of Deazapurine Bases

1993 ◽  
Vol 58 (6) ◽  
pp. 1419-1429 ◽  
Author(s):  
Hana Dvořáková ◽  
Antonín Holý
Keyword(s):  
Biological Effects ◽  
Sodium Hydride ◽  
Cesium Carbonate ◽  
Cytostatic Effect ◽  
Phosphonic Acids ◽  
Dna Viruses ◽  
Purine Bases ◽  
Heterocyclic Bases ◽  
L 1210 Leukemia ◽  
Derivatives Of

Analogs of antiviral 9-(2-phosphonomethoxyethyl)adenine (PMEA,II), containing modified purine bases 1-deazaadenine (VII, 3-deazapurine (XI), 7-deaza-7-cyanoadenine (XIIIb) and 3-deazaguanine (XXIb) were prepared by alkylation of the heterocyclic bases with bis(2-propyl) 2-chloroethoxymethylphosphonate (V) in dimethylformamide in the presence of sodium hydride or cesium carbonate. The obtained protected derivatives were deblocked with bromotrimethylsilane to give the phosphonic acids. 3-DeazaPMEG (XXIb) is active against DNA viruses and exhibits a marked cytostatic effect against L-1210 leukemia.

Determination of the Stoichiometry of the Adducts Formed between some Heterocyclic Bases and Copper(II) Bis(diethyldithiocarbamate) in Various Solvents

1973 ◽  
Vol 51 (10) ◽  
pp. 1530-1534 ◽  
Author(s):  
J. B. Farmer ◽  
F. G. Herring ◽  
R. L. Tapping
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Paramagnetic Resonance ◽  
Benzene Toluene ◽  
Heterocyclic Bases ◽  
Electron Paramagnetic

The stoichiometry of the adducts formed between copper(II) bis(diethyldithiocarbamate) and pyridine in benzene, toluene, and chloroform and between 3-picoline, 4-picoline, and 3,4-lutidine in benzene are shown to be 1:1. The method employed is that of Scatchard using electron paramagnetic resonance studies.

Intercalates of ?-Sn(HP04)2�H2O with aromatic and heterocyclic bases and some comments on their orientation in the interlayer region

1990 ◽  
Vol 9 (3) ◽  
pp. 207-217 ◽  
Author(s):  
A. Jim�nez-l�pez ◽  
P. Maireles-Torres ◽  
P. Olivera-Pastor ◽  
E. Rodriguez-Castell�n ◽  
M. J. Hudson ◽  
...  
Keyword(s):  
Interlayer Region ◽  
Heterocyclic Bases

Ternary copper(II) complexes of thiosemicarbazones and heterocyclic bases showing N3OS coordination as models for the type-2 centers of copper monooxygenases

2003 ◽  
Vol 349 ◽  
pp. 149-158 ◽  
Author(s):  
Anil D. Naik ◽  
Pattubala A.N. Reddy ◽  
Munirathinam Nethaji ◽  
Akhil R. Chakravarty
Keyword(s):  
Heterocyclic Bases
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