Metal ions in metallo-β-lactamases (MBLs) play a major role in catalysis. In this study we investigated the role of the metal ions in the Zn1 and Zn2 sites of MBL L1 during catalysis. A ZnCo (with Zn(II) in the invariant Zn1 site and Co(II) in the Zn2 site) analog of MBL L1 was prepared by using a biological incorporation method. Extended X-ray Absorption Fine Structure (EXAFS) spectroscopic st...

An anaerobic thermophilic strain (strain PCO) was isolated from a syngas-converting enrichment culture. Syngas components cannot be used by strain PCO, but the new strain is very tolerant to carbon monoxide (pCO = 1.7 × 10(5) Pa, 100% CO). 16S rRNA gene analysis and DNA-DNA hybridization revealed that strain PCO is a strain of Thermoanaerobacter thermohydrosulfuricus. The physiology of strain P...

bamboo-structured carbon nanotubes are grown on co-mo/mcm-41 catalyst in the temperature range of 873-973 k by thermal chemical vapor deposition of acetylene. this study shows that the purified carbon nanotubes have open tips and the metals of the catalyst are not encapsulated. thus, the bamboo-structure seems to grow from the base. pore size distribution of the product is quite narrow and is i...

We describe an approach to extract attribute-value pairs from product descriptions on the Web. The goal is to augment product databases by representing each product as a set of such attribute-value pairs. Such a representation is useful for a variety of tasks where treating the product as a set of attribute-value pairs is more useful than as an atomic entity. Examples include product recommenda...

in this paper, modeling and optimization of fischer-tropsch synthesis is considered in a fixed-bed catalytic reactor using an industrial fe-cu-k catalyst. a one dimensional pseudo-homogenous plug flow model without axial dispersion is developed for converting syngas to heavy hydrocarbons. the effects of temperature, pressure, h2 to co ratio in feed stream, and co molar flow on the mass flow rat...

formation was published in an erratum in the February issue of the Journal [2]. This is an obvious error, because the study, funded by Merck & Co., used the Merck & Co. product RECOMBIVAX HB/H-B-VaxII. The Discussion section discussed only the use of RECOMBIVAX HB/H-B-VaxII as a 2-dose regimen. It was not our intent to suggest that the Twinrix product did not stimulate a good immunologic respon...

The vibrational temperatures of product CO(2) were measured in CO oxidation on Pd(111) as a function of the desorption angle by means of infrared chemiluminescence. The antisymmetric vibration temperature was separately determined from the other vibrational modes from the normalized chemiluminescence intensity. The product CO(2) desorption is sharply collimated along the surface normal. The ant...

A fluorescence chemsensor for carbon monoxide (CO), based on transformation of weakly fluorescent iodide to strong fluorescent amino product upon reacting with CO, shows abilities of quantitative measurement of CO in air at a level of 50-1000 ppm and real-time and on-site monitoring for CO flammation/explosion.

Eleven flavoproteins from the old yellow enzyme family were found to catalyze the disproportionation ("dismutation") of conjugated enones. Incomplete conversions, which were attributed to enzyme inhibition by the co-product phenol could be circumvented via in situ co-product removal by scavenging the phenol using the polymeric adsorbent MP-carbonate. The optimized system allowed to reduce an al...

Citation: Parimi NS, Singh M, Kastner JR, Das KC, Forsberg LS and Azadi P (2015) Optimization of protein extraction from Spirulina platensis to generate a potential co-product and a biofuel feedstock with reduced nitrogen content. Front. Energy Res. 3:30. doi: 10.3389/fenrg.2015.00030 Optimization of protein extraction from Spirulina platensis to generate a potential co-product and a biofuel fe...