scholarly journals Enhancing Phycoerythrin and Phycocyanin Production from Porphyridium cruentum CCALA 415 in Synthetic Wastewater: The Application of Theoretical Methods on Microalgae

Author(s):  
Melih ONAY
2016 ◽  
Vol 14 (3) ◽  
pp. 557-561
Author(s):  
Nguyễn Thị Yên ◽  
Kiều Thị Quỳnh Hoa

Lead contaminated wastewater negatively impacts to living organisms as well as humans. In recent years, a highly promising biological process using the anaerobic production of sulfide ions by sulfate-reducing bacteria has presented itself as an alternative option for the removal of lead. This process is based on microbial utilization of electron donors, such as organic compounds (carbon sources), and sulfate as the terminal electron acceptor for sulfide production. The biogenic hydrogen sulfide reacts with dissolved heavy metals to form insoluble metal sulfide precipitates Removal of lead by an enriched consortium of sulfate-reducing bacteria (DM10) was evaluated sulfate reduction, sulfide production and lead precipitation. Four parallel anaerobic continuous stirred tank reactors (CSTR, V = 2L) (referred as R1 - R4) were fed with synthetic wastewater containing Pb2+ in the concentrations of 0, 100, 150 and 200 mg L-1 of lead and operated with a hydraulic retention time of 5 days for 40 days. The loading rates of each metal in R1- R4 were 0, 20, 30 and 40 mg L-1 d-1, respectively. The results showed that there was no inhibition of SRB growth and that lead removal efficiencies of 99-100% for Pb2+ were achieved in R2 (100 mg L-1) and R3 (150 mg L-1) throughout the experiment. For the highest lead concentration of  200 mg L-1, a decrease in efficiency of removal (from 100 to 96%) was observed at the end of the experiment. The obtained result of this study might help for a better control operation and performance improvements of reactors.


Author(s):  
Надія Подоляка

The purpose of the article is to investigate the peculiarities of the national Ukrainian culture in the artistic design of the editions of the Kharkov cooperative publishing house «Rukh». Research methods: Empirical-theoretical methods of analysis, synthesis, deduction are used. From the theoretical methods, a description and interpretation is applied. The use of these methods made it possible to prove that the publications of the Kharkov cooperative publishing house «Rukh» are a highly cultured artistic product, shrouded in the aura of the traditions of Ukrainian culture. It is proved that in the 20-ies. XX century. around the «Rukh» united a circle of like-minded writers, critics, editors, illustrators. Book covers were made by M. Samokish, S. Borovoy, V. Krichevsky. It is established that in the graphic design of the editions the editors used font ensembles, decorative elements and other visual materials created by the most prominent representatives of the artistic circles, in which the Ukrainian tradition is traced. In the design of covers used a variety of frames, ornaments of vegetable origin, stylized with letters. At the same time, minimalism of forms, compositions in a black and white version was quite common. Attention is focused on the works of the famous graphs of the era of the Ukrainian revival, created by the order of the Kharkiv cooperative publishing house «Rukh». The features of the national Ukrainian culture in the artistic design of publications are analyzed. Illustrations, graphic elements, style of execution and technique of the Ukrainian artists cooperating with the publishing house are characterized. The study significantly expands the view on publishing at the stage of the formation of Soviet power. The results can be used to write textbooks and teaching aids on cultural studies, the history of publishing and the history of Ukraine.


2015 ◽  
Vol 14 (3) ◽  
pp. 681-688
Author(s):  
Milan Sak-Bosnar ◽  
Natalija Velic ◽  
Olivera Galovic ◽  
Tonci Rezic ◽  
Bozidar Santek ◽  
...  
Keyword(s):  

2013 ◽  
Vol 12 (12) ◽  
pp. 2371-2383
Author(s):  
Krishnaswamy Usharani ◽  
Perumalsamy Lakshmanaperumalsamy ◽  
Muthusamy Muthukumar

2008 ◽  
Vol 59 (10) ◽  
Author(s):  
Paul Ionut Dron ◽  
Neculai Doru Miron ◽  
Gheorghe Surpateanu

The paper presents the synthesis of cyclo (bis-paraquat p-phenylene p-phenylene-carbonyl) tetrakis (hexafluorophosphate), named �CETOBOX�, and the closely related structural determinations. This compound exists in three tautomeric forms. These forms were evidentiated by NMR-data (1H-NMR, TOCSY, COSY, NOESY), UV-Vis spectra coupled with pH measurements and by synthesis. As the �CETOBOX� gives �in situ� only the corresponding monoylide, the synthesis of a new fluorescent indolizine cyclophane has been performed by a 3+2 cycloaddition. All structures of the new compounds presented herein have been established by NMR spectroscopy. Also, theoretical methods (MM3, AM1, AM1-COSMO and B88LYPDFT) have been used to determine the most stable conformer structures.


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