نتایج جستجو برای: cellulose ccartridge filter

تعداد نتایج: 152772  

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2005
Yasunori Sasakura Keisuke Nakashima Satoko Awazu Terumi Matsuoka Akie Nakayama Jun-ichi Azuma Nori Satoh

Tunicates are the only animals that perform cellulose biosynthesis. The tunicate gene for cellulose synthase, Ci-CesA, was likely acquired by horizontal transfer from bacteria and was a key innovation in the evolution of tunicates. Transposon-based mutagenesis in an ascidian, Ciona intestinalis, has generated a mutant, swimming juvenile (sj). Ci-CesA is the gene responsible for the sj mutant, i...

2014
Marli Camassola Aldo J. P. Dillon

The main limitation to the industrial scale hydrolysis of cellulose is the cost of cellulase production. This study evaluated cellulase and xylanase enzyme production by the cellulolytic mutant Penicillium echinulatum 9A02S1 using pretreated sugar cane bagasse as a carbon source. Most cultures grown with pretreated bagasse showed similar enzymatic activities to or higher enzymatic activities th...

Journal: :Energy technology 2021

Following the example of photovoltaics, one approach to large-scale photocatalytic hydrogen production is irradiation a correspondingly large catalyst area. Paper process in which areas can already be produced based on main component: cellulose. Herein, TiO2 photocatalyst modification PC500, also uses platinum nanoparticles as cocatalyst, supported two different ways using On hand, fixed surfac...

2004
Anna Carlmark

Controlled radical polymerization has proven to be a viable route to obtain polymers with narrow polydispersities (PDI’s) and controlled molecular weights under simple reaction conditions. It also offers control over the chain‐ends of the synthesized polymer. Atom transfer radical polymerization (ATRP) is the most studied and utilized of these techniques. In this study ATRP has ...

2010
Gernot Jäger Zhuojun Wu Kerstin Garschhammer Philip Engel Tobias Klement Roberto Rinaldi Antje C Spiess Jochen Büchs

BACKGROUND It is important to generate biofuels and society must be weaned from its dependency on fossil fuels. In order to produce biofuels, lignocellulose is pretreated and the resulting cellulose is hydrolyzed by cellulases such as cellobiohydrolases (CBH) and endoglucanases (EG). Until now, the biofuel industry has usually applied impractical celluloses to screen for cellulases capable of d...

Journal: :archives of razi institute 2016
a. khafri a. nazari

alpha toxin derived from clostridium perfringens was used for diagnosis of streptococcus agalactiae (st.agalactiae) by rapid and spot camp tests. the selected cl.perfringens strain was cultured in optimized conditions; the supernatant of culture was concentrated by ultra filter and purified by deae cellulose chromatography. the efficacy of both purified and crude α-toxins were examined by rapid...

Journal: :Talanta 2002
M Soylak U Divrikli L Elci M Dogan

A method for the preconcentration and determination of Cr(III), Co(II), Cu(II), Fe(III) and Pb(II) ions by atomic absorption spectrometry has been described. The method was based the collection of metal-calmagite complexes on a soluble cellulose nitrate membrane filter. The detection of the solution was obtained by flame atomic absorption spectrometry (FAAS) after completely dissolving the memb...

Journal: :Journal of reproduction and fertility 1990
G C England W E Allen

A modified chemotaxis chamber was used to evaluate cellulose acetate/nitrate filters for the measurement of dog sperm motility. The distance travelled into the filters was affected by filter pore size, incubation time and sperm concentration. After storage of spermatozoa at 37 degrees C the distance penetrated into the filters reflected the deterioration of the sample, but was not as sensitive ...

2013
Martin Harper Kevin Ashley

Airborne particles that are collected using closed-face filter cassettes (CFCs), which are used widely in the sampling of workplace aerosols, can deposit in places other than on the filter and thereby may not be included in the ensuing analysis. A technique for ensuring that internal non-filter deposits are included in the analysis is to collect airborne particles within an acid-soluble interna...

Journal: :The Biochemical journal 1975
K A Abraham T S Eikhom

A number of parameters affecting the adsorption of rRNA and poly(A)-containing RNA to Millipore filters were investigated separately. Binding of both types of RNA to the filter was dependent on the concentration of RNA, pH and Mg2+ concentration of the reaction mixture. Both types of RNA bound to the filter optimally at slightly acid pH values. The binding of poly(A)-containing RNA to the filte...

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