We prepare multi-component transition monocarbides of chosen composition by arc-melting together a pre-alloy the metals and cast iron. Based on elements Ti, Ta, V, Nb W, 51 different binary, ternary quaternary compositions are produced. The intrinsic hardness H modulus E resulting iron-embedded carbide particles directly measured using nanoindentation. Of all tested here WC shows highest while ...

Respiratory rate (f) and tidal volume (VT) have been measured at normal and at warm ambient temperatures (Ta) in adult domestic fowl by means of a whole body plethysmograph. Resting values of f = 23 +/- 9 min-1 and of VT = 25.6 +/- 0.9 ml min-1 were found. At Ta 30, 35 or 40 degrees C f increased in direct relation to the severity of the heat stress reaching a maximum values of 273 +/- 12 min-1...

The effects of the electronic and geometric factors on the global minimum structures of MB9(-) (M = V, Nb, Ta) are investigated using photoelectron spectroscopy and ab initio calculations. Photoelectron spectra are obtained for MB9(-) at two photon energies, and similar spectral features are observed for all three species. The structures for all clusters are established by global minima searche...

Given a ®nitely supported sequence a on Z and an s s dilation matrix M, the transition operator Ta is the linear operator de®ned by Tav…a† :ˆ P b2Zs a…Maÿ b†v…b†, where a 2 Z and v lies in `0…Z†, the linear space of all ®nitely supported sequences on Z. In this paper we investigate the spectral properties of the transition operator Ta and apply these properties to the study of the approximation...

X iv :m at h/ 05 11 35 0v 1 [ m at h. D G ] 1 4 N ov 2 00 5 Odnaжdy starik-egipt nin prizval k sebe svoego starxego syna i govorit emu: — Synok, otkro tebe straxnu ta nu. Жrecy iz hrama solnca Amon-Ra — ne bogi ! — Otec, kak moжno ! Oni жe govor t so zvezdami i predskazyva t zatmeni ! — izumils syn. No starik prodolжil nevozmutimo: — Ew v detstve ta kom pronik v ih hram i videl, qto oni ed t i ...

Toxin-antitoxin (TA) systems are small genetic elements that typically encode a stable toxin and its labile antitoxin. These cognate pairs are abundant in prokaryotes and have been shown to regulate various cellular functions. Vibrio cholerae, a human pathogen that is the causative agent of cholera, harbors at least thirteen TA loci. While functional HigBA, ParDE have been shown to stabilize pl...

Dense, high-entropy carbide cobalt-bonded hardmetals with two different compositions, namely (Hf-Ta-Ti-Nb-V)C-19.2 vol% Co and (Ta-Ti-Nb-V-W)C-19.2 Co, were successfully manufactured by gas pressure sintering (SinterHIP) at 1400 °C 100 bar Ar pressure. The microstructure of these consists a rigid skeletal phase embedded in tough binder phase. EDS mappings showed that the did not decompose typic...

Toxin-antitoxin (TA) systems have been reported in the genomes of most bacterial species, and their role when located on the chromosome is still debated. TA systems are particularly abundant in the massive cassette arrays associated with chromosomal superintegrons (SI). Here, we describe the characterization of two superintegron cassettes encoding putative TA systems. The first is the phd-doc(S...

Hydroxyapatite/tannic acid coating (HA/TA) were prepared on AZ31 magnesium alloys (AZ31) via chemical conversion and biomimetic methods. The characterization and properties of the coating were studied by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), corrosion testing, MC3T3-E1 cell proliferation assay, and MC3T3-E1 cell morphology o...

The disparate solubility, redox activity, and pH stability of the group V and group VI polyoxometalates (POMs) confer very different functionality on these species, and tailoring cluster properties by varying the ratio of group V to group VI metals poses both an opportunity and a synthetic challenge. A classic series of studies reported over 40 years ago provided some insight into W/Nb POMs, fr...