Amplification and sequencing of mitochondrial DNA regions corresponding to three major clusters of transfer RNA genes from a variety of species representing major groups of birds and reptiles revealed some new variations in tRNA gene organization. First, a gene rearrangement from tRNA(His)-tRNA(Ser)(AGY)-tRNA(Leu)(CUN) to tRNA(Ser)(AGY)-tRNA(His)tRNA(Leu)(CUN) occurs in all three crocodilians e...

In this work, zeolite NaY was prepared by hydrothermal method. Then, silver ions were replaced in the zeolite NaY with silver nitrate (AgNO3) solution via using ion exchange (IE) method. The Manganese dioxide (MnO2) nanoparticles (9.3 and 15.8 wt %) for guest were deposited in the zeolite AgY(host) structure with Mn(NO3)2 aqueous and KMnO4 solutions by confined space synthesis (CSS) metho...

Secondary and tertiary structures of tRNAs are remarkably preserved from bacteria to humans, the notable exception being the mitochondrial (m) tRNAs of metazoans, which often deviate substantially from the canonical cloverleaf (secondary) or 'L'-shaped (tertiary) structure. Many metazoan mtRNAs lack either the TpsiC (T) or dihydrouridine (D) loops of the canonical cloverleaf, which are known to...

Az élethosszig tartó tanulás az uniós irányelvekhez illeszkedve a magyar oktatási stratégia szerves részét képezi. A tanulási képességek elősegítése érdekében rendszeres mozgás, mindennapi testnevelés formájában szintén jelen van rendszerben. Utóbbinak számos kutatás és tanulmány által bizonyított hatása, hogy egyértelműen pozitívan befolyásolja folyamatát. Anders Hansen könyve mozgás emberi ag...

Nowadays, it is not questioned that the blood-brain barrier plays an extremely important role in isolating central nervous system structures from peripheral tissues, but early stages of medical research and life sciences, its existence was clearly defined. A better understanding real structure took a long time needed new techniques. Currently, researchers are still focusing on conditions like m...

vascular system David von Schack, Elisabeth Casademunt, R diger Schweigreiter , Michael Meyer, Miriam Bibel and Georg Dechant 1 Department of Neurobiochemistry, Max Planck Institute of Neurobiology, Am Klopferspitz 18a, D-82152 Martinsried, Germany 2 Present address: AGY Therapeutics, 290 Utah Avenue, South San Francisco, California 94080, USA 3 Friedrich Miescher Institut for Biomedical Resear...

Ag-exchanged Y zeolites (Si/Al = 2.5; Ag/Al 0.30–0.95) have been tested in the NH 3 –SCO reaction, most promising method for elimination of ammonia emissions, and deeply characterized before after reaction by using a variety techniques (XRD, TEM, UV–Vis, 109 Ag NMR, XAS spectroscopies). The active centres are 0 nanoparticles (NPs) formed under reduction conditions both activity selectivity to N...

In the predicted secondary structures of 20 of the 22 tRNAs encoded in mitochondrial DNA (mtDNA) molecules of the nematodes, Caenorhabditis elegans and Ascaris suum, the T psi C arm and variable loop are replaced with a loop of 6 to 12 nucleotides: the TV-replacement loop. From considerations of patterns of nucleotide correlations in the central regions of these tRNAs, it seems highly likely th...

Several approaches have yielded information on those features of tRNA structure responsible for the specific recognition of a tRNA by its cognate aminoacyl-tRNA synthetase (l-3). One method has involved comparison of the nucleotide sequences of different tRNAs (isoaccepting species) which are recognized by a single enzyme (4). Thus, a comparison of the sequences of those homologous and heterolo...