Bifunctional pyrimidine deaminase/reductase (RibD) plays an important role during riboflavin biosynthesis in many microorganisms. The 40.4 kDa RibD from Shigella flexneri 2a has been cloned, expressed, purified and characterized. Three Crystals of RibD have been obtained by the hanging-drop technique at 291 K using PEG 20k or NaCl as precipitant. The RibD crystal using PEG 20k as precipitant di...

A protein complex is shown to participate in a calcium-dependent association with plasma membranes purified either from pig mesenteric lymph node lymphocytes or from human lymphoblastoid cell lines. Plasma membranes prepared in the presence of calcium possess this complex; those prepared in the absence of calcium (5 mM EGTA) do not. The complex associates itself with the inner cytoplasmic surfa...

We discuss performance of submicron size hotelectron bolometer (HEB) mixers made from thin MgB2 superconducting films. With a superconducting transition temperature of 30K, such THz mixers can operate with high sensitivity at temperatures up to 20K. Due to very small dimensions local oscillator (LO) power requirements are rather low. In the intermediate frequency (IF) band of 1-3GHz the double...

The crystal structure of Ba2YCu3O8-03B4 (03B4=1.74) at 20K and 298K has been determined by single-crystal neutron diffraction. In contrast to the superconducting orthorhombic phase for which 6 ~ 1.1, this phase crystallizes in the tetragonal space group P4/MMM wtih 03B1 = 3.8573(4)Å and c = 11.7913(10)Å. The increase in oxygen vacancies compared to Ba2YCu3O8-03B4 (6 ~1.1.) is confined entirely ...

in this study, a new and valuable forage source was introduced with combination and silage of alfa-alfa, halocnemum and mesquite via chemical, gas production and in vivo methods. to perform this research, first the right amounts of the species were collected. then they were cut by chopper to the dimensions of less than 5 cm. then, halocnemum, mesquite fruit, alfalfa and molasses were silaged ac...

DarkSide run since mid 2015 a 50-kg-active-mass dual phase Liquid Argon Time Projection Chamber (TPC), filled with low radioactivity argon from an underground source and produced world class results for both the mass (< 20 GeV/c 2 ) high ( > 100 direct detection search dark matter. The next stage of program will be new generation experiment involving global collaboration all current based ...

The aim of the present study was to analyse electric resistivity at different ambient temperatures between 300 to 20K in the frog sciatic nerve and salmon sperm DNA. When the electrical contacts were leaned just into the sciatic nerve, an increase of the sciatic nerve resistivity was observed for 240 K < T < 300 K and a rise of electrical conductivity was apparent below 240 K. This dependence i...

In this paper, we address the out-of-vocabulary (OOV) detection and recovery problem by developing three different fragmentword hybrid systems. A fragment language model (LM) and a word LM were trained separately and then combined into a single hybrid LM. Using this hybrid model, the recognizer can recognize any OOVs as fragment sequences. Different types of fragments, such as phones, subwords,...