The support surface was previously modified with a NaA zeolite by dip coating and hydrothermal synthesis. The composition and crystalline structures of the alloy films were characterized by scanning electron microscopy (SEM), energy-dispersive X-ray analysis (EDS). X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The membrane reactor was designed and built to use either the Pd or the Pd-Ag composite membrane whose crystalline structure and typical morphology were not affected after

different reaction conditions. The Pd membrane showed the best behavior in the membrane reactor with the highest methane conversion, H(2)/CH(4) selectivity and permeation flux. After operation of the membranes at 450-500 degrees C on stream for up to 570 h no modification of the permeation parameters was observed. (C) 2010 Elsevier B.V. All rights reserved.”
“In

this study, an L-valine-producing strain was developed from Corynebacterium DAPT glutamicurn ATCC13869 through deletion of the three genes aceE, alaT and ilvA combined with the overexpression of six genes ilvB, ilvN, ilvC, lrp(1), brnF and brnE. Overexpression CBL0137 mouse of lrp(1) alone increased L-valine production by 16-fold. Deletion of the aceE, alaT and ilvA increased L-valine production by 44-fold. Overexpression of the six genes ilvB, ilvN, ilvC, lrp(1), brnE and brnF in the triple deletion mutant WCC003 further increased L-valine production. The strain WCC003/pJYW-4-ilvBNC(1)-lrp(1)-brnFE produced 243

mM L-valine in flask cultivation and 437 mM (51 g/L) L-valine in fed-batch fermentation and lacked detectable amino-acid IWR-1-endo price byproduct such as L-alanine and L-isoleucine that are usually found in the fermentation of L-valine-producing C. glutamicum. (C) 2015 International Metabolic Engineering Society. Published by Elsevier Inc. All rights reserved.”
“We describe and demonstrate a fabrication process for silicon sieves with highly-uniform, micron-sized pyramidal shaped pores featuring squared apertures. These sieves are fabricated over areas of several square millimetres by means of double-side standard UV-lithography and wet etching in (100)-silicon. We intend to use these sieves for hydrodynamic cell capture devices (sieves), suitable for integration of electrodes for electrophysiological measurements of neuronal networks. For the fabrication process, standard plain silicon wafers are used, without the need for etch-stop layers or silicon-on-insulator. To ensure that the sieve contains pores with identical aperture sizes by merely the use of a timed etch-stop, sacrificial octahedral structures are formed underneath each pore by means of corner lithography. These sacrificial structures counteract non-uniformities in the thickness of the layer defining the sieve, resulting from the deep ( bigger than 500 mu m) anisotropic backside wet etch process.