tRNase Z is the endonuclease that is involved in tRNA 3'-end maturation by removal of the 3'-trailer sequences from tRNA precursors. Most eukaryotes examined to date, including the budding yeast Saccharomyces cerevisiae and humans, have a single long form of tRNase Z (tRNase ZL). In contrast, the fission yeast Schizosaccharomyces pombe contains two candidate tRNase ZLs encoded by the essential ...

Heat-pressed lithium disilicate (LDS)-based glass–ceramic ingots are widely used for the fabrication of dental restorations. Repressing or repeat processing remaining parts these has been reported to not adversely affect their mechanical properties. However, there is enough information on stainability crowns constructed from repeated heat-processed LDS ceramic ingots. Seventy-two identical were...

Insulin-resistance (IR) impairs agonist-induced relaxation in cerebral arteries, but little is known about its effect on constrictor mechanisms. We examined the vascular responses of the basilar artery (BA) and its side branches in anesthetized Zucker lean (ZL) and IR Zucker obese (ZO) rats using a cranial window technique. Endothelin-1 (ET-1) constricted the BAs in both the ZL and ZO rats, but...

M easurem ents of the 57Fe M össbauer effect and of m agnetic susceptibilities have been perform ed on the 57Fe doped or pure quasi-l-d antiferrom agnetic chain com pound en H 2 M nF 5 as a function of tem perature. Particular a ttention was paid to the regions very n ear the Neel point at T N = 14.5(5) K. The M össbauer spectra fitted by the Blum e-Tjon m odel show definite relaxation effects,...

Masaaki Tabata*, Masahiro Ide, Kentaro Kaneko Department of Chemistry, Faculty of Science and Engineering, Saga University, 1, Honjo-machi, Saga, 840 Japan Dedicated to Prof. Hitoshi Ohtaki on the occasion o f his 60th birthday Z. Naturforsch. 50b, 545-550 (1995); received October 26, 1994 Thermochromism, Metalloporphyrin, Equilibrium, Zinc(II) Porphyrin, Mercury(II) Porphyrin Thermochromism wa...

Purpose: The purpose of this in vitro study was to evaluate the effect simulated gastric acidity on surface roughness different types dental ceramics. Methods: Fifty specimens were divided according type material into five groups (n=10), as follows: Partially stabilized zirconia (PSZ) (Prettaue),Fully (FSZ) (Prettaue Anterior), lithium disilicate ceramics (IPS. Emax), Zirconia-containing silica...

Statement of the problem: The emergence Polyetheretherketone (PEEK) in prosthodontics and its use as a foundation for ceramic veenering restorations demand reassessment shade match final restoration. Purpose: This study aimed to investigate different materials on color output two CAD/CAM lithium silicate ceramics. Material Methods: Rectangular plate specimens (60 sample) were prepared from CAD/...

recent literature attaches high importance to scenic evaluation of natural landscapes. scenic beauty evaluation techniques often use parameters derived from photographs or collected in situ data via field assessment and questionnaires. such techniques are relatively costly and time consuming. park managers and recreational planners require spatial tools and techniques that are fast, flexible an...