9 research outputs found
High endo-β-1,4-d-glucanase activity in a broad pH range from the alkali-tolerant Nocardiopsis sp. SES28
Supplementary Material for: Agrowastes as Feedstock for the Production of Endo-β-Xylanase from Cohnella sp. Strain AR92
<p>Members of <i>Cohnella </i>sp. isolated from a variety of
environments have been shown to be glycoside hydrolase producers.
Nevertheless, most evaluations of members of this genus are limited to
their taxonomic description. The strain AR92, previously identified as
belonging to the genus <i>Cohnella</i>, formed a well-supported cluster with <i>C. thailandensis</i> and <i>C. formosensis</i>
(>80% bootstrap confidence). Its growth and xylanase production were
approached by using a mineral-based medium containing alkali-pretreated
sugarcane bagasse as the main carbon source, which was assayed as a
convenient source to produce biocatalysts potentially fitting its
degradation. By means of a two-step statistical approach, the production
of endoxylanase was moderately improved (20%). However, a far more
significant improvement was observed (145%), by increasing the inoculum
size and lowering the fermentation temperature to 25°C, which is below
the optimal growth temperature of the strain AR92 (37°C). The
xylanolytic preparation produced by <i>Cohnella</i> sp. AR92 contained
mild temperature-active endoxylanase (identified as redundant GH10
family) for the main activity which resulted in xylobiose and
xylo-oligosaccharides as the main products from birchwood xylan.</p
Optimization of the production and molecular characterization of cellulase-free xylanase from an alkalophillic Bacillus subtilis SD8 isolated from paper mill effluent
Biochemical and molecular characterization of thermo-alkali tolerant xylanase producing bacteria from thermal springs of Manikaran
Inclusive jet cross section in p\u304p collisions at 1as = 1.8 TeV
The inclusive jet differential cross section has been measured for jet transverse energies, ET, from 15 to 440 GeV, in the pseudorapidity region 0.1 64|\u3b7| 640.7. The results are based on 19.5pb 121 of data collected by the CDF Collaboration at the Fermilab Tevatron collider. The data are compared with QCD predictions for various sets of parton distribution functions. The cross section for jets with ET>200GeV is significantly higher than current predictions based on O(\u3b13s) perturbative QCD calculations. Various possible explanations for the high- ET excess are discussed
Properties of jets in Z boson events from 1.8 TeV p\u304p collisions
We present a study of events with Z bosons and hadronic jets produced in p\uafp collisions at a center-of-mass energy of 1.8 TeV. The data consist of 6708 Z\u2192e+e 12 decays from 106pb 121 of integrated luminosity collected using the CDF detector at the Fermilab Tevatron Collider. The Z+ 65n jet cross sections and jet production properties have been measured for n=1 to 4. The data are compared to predictions of leading-order QCD matrix element calculations with added gluon radiation and simulated parton fragmentation
Measurement of the \u3b3 + D*\ub1 cross section in p\u304p collisions at 1as = 1.8 TeV
We have measured the cross section of gamma + D-*+/- production in <(p)over bar p> collisions at root s = 1.8 TeV using the Collider Detector at Fermilab. In this kinematic region, the Compton scattering process (g(c) --> gamma(c)) is expected to dominate and thus provide a direct link to the charm quark density in the proton. From the 45 +/- 18 gamma + D-*+/- candidates in a 16.4 pb(-1) data sample, we have determined the production cross section to be 0.38 +/- 0.15(stat) +/- 0.11(syst) nb for the rapidity range y(D-*+/-) < 1.2 and y(gamma) < 0.9, and for the transverse momentum range p(T)(D-*+/-) > 6 GeV/c and 16 < p(T)(gamma) < 40 GeV/c. The measured cross section is compared to a theoretical prediction