Archive for 'Scientific Thing'
A nice analysis on biofilms.
M.E. Russo, P.L. Maffettone, A. Marzocchella, P. Salatino, Bifurcational and dynamical analysis of a continuous biofilm reactor, Journal of BiotechnologyVolume 135, Issue 3, , 30 June 2008, Pages 295-303.
A. Marzocchella (mail) is the corresponding author.
Here is the abstract:
A dynamical model of a continuous biofilm reactor is presented. The reactor consists of a three-phase internal loop airlift operated continuously with respect to the liquid and gaseous phases, and batchwise with respect to the immobilized cells. The model has been applied to the conversion of phenol by means of immobilized cells of Pseudomonas sp. OX1 whose metabolic activitywas previously characterized (Viggiani, A., Olivieri, G., Siani, L., Di Donato,A., Marzocchella,A., Salatino, P., Barbieri, P., Galli, E., 2006.An airlift biofilm reactor for the biodegradation of phenol by Pseudomonas stutzeri OX1. Journal of Biotechnology 123, 464–477). The model embodies the key processes relevant to the reactor performance, with a particular emphasis on the role of biofilm detachment promoted by the fluidized state. Results indicate that a finite loading of free cells establishes even under operating conditions that would promote wash out of the suspended biophase. The co-operative/competitive effects of free cells and immobilized biofilm result in rich bifurcational patterns of the steady state solutions of the governing equations, which have been investigated in the phase plane of the process parameters. Direct simulation under selected operating conditions confirms the importance of the dynamical equilibrium establishing between the immobilized and the suspended biophase and highlights the effect of the initial value of the biofilm loading on the dynamical pattern.
Get the article: 
doi:10.1016/j.jbiotec.2008.04.003
If you can’t access the article, drop a comment below…
Posted on 28 June '08 by admin, under English, Scientific Thing. .
Wiley published a special issue of Chemical Engineering & Technology journal as topical edition of downstream processesing of biotechnological producs (Issue Edited by Erwin Flaschel). It presents some focal aspects which are currently important, addressing novel products, or dealing with novel engineering strategies. Download the article package.
Table of Contents:
Cover Picture Bromo Seltzer © PhotoDisc/Getty Images (Chem. Eng. Technol. 6/2008) (p NA)
Can we expect a breakthrough in downstream processing of biotechnological products in the near future? (p 809)
Erwin Flaschel
DOI: 10.1002/ceat.200890024
Purification of Bionanoparticles (p 815-825)
L. Pedro, S. S. Soares, G. N. M. Ferreira
DOI: 10.1002/ceat.200800176
New Developments in Simulated Moving Bed Chromatography (p 826-837)
A. Seidel-Morgenstern, L. C. Keßler, M. Kaspereit
DOI: 10.1002/ceat.200800081
Extraction and Purification of Bioproducts and Nanoparticles using Aqueous Two-Phase Systems Strategies (p 838-845)
J. Benavides, O. Aguilar, B. H. Lapizco-Encinas, M. Rito-Palomares
DOI: 10.1002/ceat.200800068
Downstream Processing: From Egg to Cell Culture-Derived Influenza Virus Particles (p 846-857)
M. W. Wolff, U. Reichl
DOI: 10.1002/ceat.200800118
Downstream Processing of Plasmid DNA for Gene Therapy and Genetic Vaccination (p 858-863)
C. Voß
DOI: 10.1002/ceat.200800069
A Review of the Thermodynamics of Protein Association to Ligands, Protein Adsorption, and Adsorption Isotherms (p 864-874)
J. M. Mollerup
DOI: 10.1002/ceat.200800082
Designing Robust Preparative Purification Processes with High Performance (p 875-882)
M. Degerman, N. Jakobsson, B. Nilsson
DOI: 10.1002/ceat.200800097
Evaluation of a Sugarcane Bagasse Acid Hydrolysis Technology (p 883-892)
F. de Ávila Rodrigues, R. Guirardello
DOI: 10.1002/ceat.200700454
High Throughput Screening for the Design and Optimization of Chromatographic Processes - Miniaturization, Automation and Parallelization of Breakthrough and Elution Studies (p 893-903)
M. Wiendahl, P. Schulze Wierling, J. Nielsen, D. Fomsgaard Christensen, J. Krarup, A. Staby, J. Hubbuch
DOI: 10.1002/ceat.200800167
A Highly Efficient Procedure for the Extraction of Soluble Proteins from Bacterial Cells with Mild Chaotropic Solutions (p 904-910)
V. N. Danilevich, L. E. Petrovskaya, E. V. Grishin
DOI: 10.1002/ceat.200800024
Crystalline Proteins as an Alternative to Standard Formulations (p 911-916)
D. Hekmat, D. Hebel, D. Weuster-Botz
DOI: 10.1002/ceat.200800038
Comment on Aspects of Chitosan Preparation (p 917-921)
S. E. S. Leonhardt, B. Ondruschka, J. Ondruschka
DOI: 10.1002/ceat.20080007
Separation and Purification of bgr-Carotene from Chlorophyll Factory Residues (p 922-927)
M. Huang, Y.-J. Xu, Q.-L. Lv, Q.-L. Ren
DOI: 10.1002/ceat.200800039
Posted on 22 June '08 by admin, under Scientific Thing, Türkçe. .
Tuzla Cemetery overlooks Tuzla Shipyards. Now start walking down the cemetery slope. On your left is the military zone. Green and free of humans. Then all of a sudden you see nothing but concrete blocks of flats. The workers leave their homes around seven in the morning to work “outside”, in the shipyards, in leather and side industries. Among the family flats you can also find bachelor apartments filled with beds and longing for the family. Keep walking down the slope: factories manufacturing small ship parts, the unceasing roar from the İçmeler Köprüsü on the E5 freeway, the never empty labor pick-up strip at the crossroads, the sound of the local express train. Walk pass the İçmeler stop, and here is Aydınlı Bay packed with almost all of Turkey’s shipyards. The workers who go through forty eight different doors everyday, hundred men high cranes, steel sheets, the speed and sweat which merge them into one. The time unit in the shipyards is the fleeting instant a cigarette bud is dropped on the floor, the split second between making a living and death between hope and pain, their and ours. Tuzla Cemetery overlooks Tuzla Shipyard…
Report On Work Security In Tuzla Shipyards (Turkish / Türkçe)
Project Blogs:
http://www.paraketa.net
http://4857-belgesel.blogspot.com/
http://4857-documentary.blogspot.com/
Accessing to information and/or knowledge is limited even if it’s on the internet. Countless scientific databases holds countless articles & books restricted for some. Storks didn’t bring it to us, we have to share & distribute it freely…
Victor Shoup, makes it possible in his style: publishing a stiff Number Theory book under the Creative Commons Licence.
A book introducing basic concepts from computational number theory and algebra, including all the necessary mathematical background.
The book is published by Cambridge University Press. It can be purchased directly from Cambridge University Press, or from online book retailers. However, the book will continue to be freely available online in PDF format under a Creative Commons license.
Download it here: ntb-v2_5
Posted on 31 May '08 by admin, under Scientific Thing, Türkçe. .
Slavoj Žižek‘in son kitabı, In Defense of Lost Causes yeni çıktığı için ufacık bir Žižek Durumu eleştirisi yapmak istedim. Kitabı henüz incelemekteyim, daha sonra bir eleştirisini yazmak isterim. (Kitap hakkında kısa bir gözden geçirme yazısı ve satın almak için bu bağlantıyı kullanabilirsiniz).
Kendisi mi böyle olmak istedi, yoksa Žižek’den çok Žižekçiler mi kendisini bu hale soktu bilmiyorum ama eni konu değerli bir insandır. Sublime Object of Ideology ile tanışmıştım kendisiyle, hatırlarım, kitap bir ara elimden düşmezdi. 
Gel zaman git zaman öyle bir hale dönüştü ki bu Žižekmania artık sonu ne zaman gelir bilemiyorum. Ideoloji kavramını tartışırken bile Žižek’e karşı çıksanız mutlaka ortamda size kötü kötü bakan insanlar olacaktır. Olay bir ara iyice çığrından çıkıp, Žižek’in bir fotomodelvari bir kadınla eviliğinin fotoğraflarının basına sızmasına kadar gelmişti. Kendisi hakkında çekilen belgeseller bir yana dursun, A.B.D.’de yaşayan bir arkadaşım bir konferansında Žižek amcamızla tanışan bir kızın histerik göz yaşlarına tutuluşunu bile anlatmıştı -teyyid ettiremedim, geçerliliğinden emin değilim-.
Felsefi üretimi bir yana dursun, pop müziği konserine çıkan şarkıcıların ardından çılgınlar gibi bağıran ve dokunulabilecek tanrılar arayan o insanlar… Söylenebilecek çok şey var. Tavsiyemdir ki, Slavoj Žižek’in kendisini sadece üretimleri ile değerlendirmenizdir.
Kendisiyle 11 Mart’ta ve 12 Mayıs (dün) yapılan ve Democracy Now‘da yayınlanan söyleşilere de sırasıyla bu bağlantıdan ve buradan ulaşabilirsiniz.
Sayın seyirciler şimdi karşınızda Sibel Tüzün’den Süperstar…
