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Sample records for tlkinud tiiu speek

  1. Botaanikud Chamisso ja Eschscholtz Californias / Tiiu Speek

    Index Scriptorium Estoniae

    Speek, Tiiu, 1958-

    2012-01-01

    Loodusteadlaste A. von Chamisso ja J. Fr. Eschscholtzi osalemisest O. von Kotzebue ekspeditsioonidel (1815-1818 ning 1823-1826); reisidel kogutud ja kirjeldatud USA lääneosa ja California taimeliikidest ning neist koostatud herbaariumite saatusest

  2. Unistusest lahutas vaid väin / Tiiu Speek

    Index Scriptorium Estoniae

    Speek, Tiiu

    2004-01-01

    1995. aasta augustis-septembris läbis 23 eestlast Livonial polaaruurijate John Franklini, Roald Amundseni ja Henry Larseni jälgedes Loodeväila. Rein Vahisalu raamatu "Amundseni nimekiri : eestlased Loodeväilas" (Tallinn, 2004) põhjal

  3. TPÜ Akadeemilise Raamatukogu ajaloolised kogud rahvusvahelistes infoallikates / Tiiu Reimo

    Index Scriptorium Estoniae

    Reimo, Tiiu, 1953-

    2005-01-01

    Lk. 99 mainitud : Urve Lõhmus, Voldemar Miller, Tiiu Reimo; lk. 100 : Voldemar Miller, Kyra Robert; lk. 102 : Tiiu Reimo, Medea Jerser, Toomas Raudam; lk. 103 : Antti Oviir, Aita Jõulu; lk. 104 : Tiiu Reimo, Marita Paas, Mati Merioja, Tiiu Pukk, Eve Roosileht

  4. Modified SPEEK membranes for direct ethanol fuel cell

    KAUST Repository

    Maab, Husnul

    2010-07-01

    Membranes with low ethanol crossover were prepared aiming their application for direct ethanol fuel cell (DEFC). They were based on (1) sulfonated poly(ether ether ketone) (SPEEK) coated with carbon molecular sieves (CMS) and (2) on SPEEK/PI homogeneous blends. The membranes were characterized concerning their water and ethanol solution uptake, water and ethanol permeability in pervaporation experiments and their performance in DEFC tests. The ethanol permeabilities for the CMS-coated (180 nm and 400 nm thick layers) SPEEK were 8.5 and 3.1 x 10(-10) kg m s(-1) m(-2) and for the homogeneous SPEEK/PI blends membranes with 10, 20 and 30 wt.% of PI were 4.4, 1.0 and 0.4 x 10(-10) kg m s(-1) m(-2) respectively, which is 2- to 50-fold lower than that for plain SPEEK (19 x 10(-10) kg m s(-1) m(-2)). Particularly the SPEEK/PI membranes had substantially better performance than Nafion 117 membranes in DEFC tests at 60 degrees C and 90 degrees C. (C) 2010 Elsevier B.V. All rights reserved.

  5. Mida arvavad koolist õppejõud väljastpoolt akadeemiat? / Tiiu Reimo, Kaie Holm, Malle Ermel, Tiiu Valm

    Index Scriptorium Estoniae

    2012-01-01

    TLÜ Infoteaduste Instituudi direktori Tiiu Reimo, Tallinna Keskraamatukogu direktori Kaie Holmi, Tartu Ülikooli Raamatukogu direktori kt Malle Ermeli ja kirjastuse TEA toimetuse juhataja Tiiu Valmi arvamused infoteaduse ja raamatukogunduse alase õppe korraldusest Viljandi Kultuuriakadeemias

  6. Tallinnas Narva mnt. 7 asuva kohviku Zebra sisekujundus / Tiiu Truus, Tiiu Prisko, Mati Veermets...[jt.

    Index Scriptorium Estoniae

    2006-01-01

    põhiplaan, 11 värv. vaadet; fotod: Kalle Veesaar; laes olevate dekoratiivsete lippude graafiline kujundus on Tiiu Priskolt ja Mati Veermetsalt, tualettruumi looduskivist valamu ja põrandavaasi autor on Kaido Kivi

  7. EFFE 2001 konverents Tallinnas / Tiiu Kuurme

    Index Scriptorium Estoniae

    Kuurme, Tiiu, 1953-

    2001-01-01

    24.- 27. maini 2001 toimub Tallinnas EFFE 2001 (European Forum for Freedom in Education) konverents "Haridus tänases kodanikuühiskonnas". Konverentsi korraldavad Sirje Priimägi ja Tiiu Kuurme. Arutatakse lapse, lapsevanema, õpetaja ja kooli vabaduse teemat. European Forum for Freedom in Education ehk EFFE on üleeuroopaline organisatsioon, mis ühendab alternatiivpedagoogiliste ja humanistlike liikumiste esindajaid

  8. Tiiu Truus : minimalism on elatav / Aale Kask

    Index Scriptorium Estoniae

    Kask, Aale

    2008-01-01

    Sisearhitekt Tiiu Truus sisearhitekti tööst, disainkodust, oma materjalieelistustest, mööbli, treppide ja kaminate ise disainimisest, koostööst tellijatega, inspiratsiooniallikatest. T. Truusi kujundatud ärinaise korterist Tallinnas, eramust (arhitekt Kalle Vellevoog) Tartus, villast (arhitekt Emil Urbel) Veskimöldres, Aaviku elurajooni tüüpmajast (arhitekt E. Urbel). T. Truusile omistatud preemiad

  9. Elutervik ja aeg : murdkem püramiidi võim / Sigmund Kvaloy ; tõlk. Tiiu Speek

    Index Scriptorium Estoniae

    Kvaloy, Sigmund

    2005-01-01

    Nüüdisaegsest ökofilosoofiast, tööstusliku kasvu ühiskonna ja eluliste vajaduste ühiskonna vastuoludest ning Norra ökopoliitikast. Lisatud lühiülevaade autori elukäigust. Vt. ka: David Rothenberg. Elutervik ja elulised vajadused: Eesti tee. Lk. 549

  10. Elutervik ja aeg : murdkem püramiidi võim / Sigmund Kvaloy ; tõlk. Tiiu Speek

    Index Scriptorium Estoniae

    Kvaloy, Sigmund

    2005-01-01

    Nüüdisaegsest ökofilosoofiast, tööstusliku kasvu ühiskonna ja eluliste vajaduste ühiskonna vastuoludest ning Norra ökopoliitikast. Lisatud lühiülevaade autori elukäigust. Vt. ka: David Rothenberg. Elutervik ja elulised vajadused: Eesti tee

  11. Kuidas suhtute erakooli? / Andrus Kuusmann, Rein Rebane, Tiiu Kuurme ... [jt.

    Index Scriptorium Estoniae

    2012-01-01

    Küsimusele vastavad Tartu erakooli nõukogu esimees Andrus Kuusmann, Rocca al Mare Kooli AS-i juhataja Rein Rebane, TLÜ õppejõud Tiiu Kuurme, Viljandi Waldorfkooli õpetaja Sulev Ojap ja TLÜ õppejõud Tõnu Ploompuu

  12. Arthur Puksovi fondi auhind Tiiu Reimole / Sirje Lauring Vaska

    Index Scriptorium Estoniae

    Lauring Vaska, Sirje

    2004-01-01

    Arthur Puksovi fond (Kanada) määras esimese preemia laureaadiks TPÜAR baltika ja haruldaste raamatute osakonna vanembibliograafi, TPÜ raamatuteaduse õppetooli juhataja professor Tiiu Reimo väljaande "Raamatukultuur Tallinnas 18. sajandi teisel poolel" eest

  13. Biofilm behavior on sulfonated poly(ether-ether-ketone) (sPEEK)

    International Nuclear Information System (INIS)

    Montero, Juan F.D.; Tajiri, Henrique A.; Barra, Guilherme M.O.; Fredel, Márcio C.; Benfatti, Cesar A.M.; Magini, Ricardo S.; Pimenta, Andréa L.; Souza, Júlio C.M.

    2017-01-01

    Poly(ether-ether-ketone) (PEEK) has also shown to be very attractive for incorporating therapeutic compounds thanks to a sulfonation process which modifies the material structure resulting in a sulfonated-PEEK (sPEEK). Concerning biomedical applications, the objective of this work was to evaluate the influence of different sulfonation degree of sPEEK on the biofilm growth. PEEK samples were functionalized by using sulphuric acid (98%) and then dissolved into dimethyl-sulfoxide. A dip coating technique was used to synthesize sPEEK thin films. The sulfonation degree of the materials was analyzed by FT-IR, H NMR, TG and IEC. The surfaces were characterized by scanning electron microscopy, profilometry and contact angle analyses. Subsequently, the biofilm formation on sulfonated-PEEK based on Streptococcus mutans and Enterococcus faecalis was measured by spectrophotometry, colony forming units (CFU mL −1 ) and SEM. Results obtained from thermal and chemical analyses showed an intensification in sulfonation degree for sPEEK at 2 and 2.5 h. The E. faecalis or S. mutans biofilm growth revealed statistically significant differences (p < 0.05) between 2 and 3 h sulfonation groups. A significant decrease (p < 0.05) in CFU mL −1 was recorded for S. mutans or E. faecalis biofilm grown on 2.5 or 3 h sPEEK. Regarding the thermal-chemical and microbiologic analyses, the sulfonation degree of sPEEK ranging from 2 up to 3 h was successful capable to decrease the biofilm growth. That revealed an alternative strategy to embed anti-biofilm and therapeutic compounds into PEEK avoiding infections in biomedical applications. - Highlights: • PEEK can be dissolved to incorporate therapeutic compounds. • High sulfonation degree on sPEEK affected the biofilm growth. • The sulfonation degree must be controlled to maintain the properties of sPEEK.

  14. Biofilm behavior on sulfonated poly(ether-ether-ketone) (sPEEK)

    Energy Technology Data Exchange (ETDEWEB)

    Montero, Juan F.D. [Center for Research on Dental Implants (CEPID), School of Dentistry (ODT), Federal University of Santa Catarina - UFSC, Florianópolis, SC 88040-900 (Brazil); Tajiri, Henrique A.; Barra, Guilherme M.O.; Fredel, Márcio C. [Department of Mechanical Engineering (EMC), Federal University of Santa Catarina (UFSC), Florianópolis, SC 88040-900 (Brazil); Benfatti, Cesar A.M.; Magini, Ricardo S. [Center for Research on Dental Implants (CEPID), School of Dentistry (ODT), Federal University of Santa Catarina - UFSC, Florianópolis, SC 88040-900 (Brazil); Pimenta, Andréa L. [Integrated Laboratories Technologies (InteLAB), Dept. Chemical Engineering (EQA), Federal University of Santa Catarina - UFSC, Florianópolis, SC 88040-970 (Brazil); Department of Biologie, Université de Cergy Pontoise, 2, Av. Adolphe Chauvin, 95302 Cergy Pontoise (France); Souza, Júlio C.M., E-mail: julio.c.m.souza@ufsc.br [Center for Research on Dental Implants (CEPID), School of Dentistry (ODT), Federal University of Santa Catarina - UFSC, Florianópolis, SC 88040-900 (Brazil); Center for Microelectromechanical Systems (CMEMS), Dept. Mechanical Engineering (DEM), Campus Azurém, 4800-058 Guimarães (Portugal)

    2017-01-01

    Poly(ether-ether-ketone) (PEEK) has also shown to be very attractive for incorporating therapeutic compounds thanks to a sulfonation process which modifies the material structure resulting in a sulfonated-PEEK (sPEEK). Concerning biomedical applications, the objective of this work was to evaluate the influence of different sulfonation degree of sPEEK on the biofilm growth. PEEK samples were functionalized by using sulphuric acid (98%) and then dissolved into dimethyl-sulfoxide. A dip coating technique was used to synthesize sPEEK thin films. The sulfonation degree of the materials was analyzed by FT-IR, H NMR, TG and IEC. The surfaces were characterized by scanning electron microscopy, profilometry and contact angle analyses. Subsequently, the biofilm formation on sulfonated-PEEK based on Streptococcus mutans and Enterococcus faecalis was measured by spectrophotometry, colony forming units (CFU mL{sup −1}) and SEM. Results obtained from thermal and chemical analyses showed an intensification in sulfonation degree for sPEEK at 2 and 2.5 h. The E. faecalis or S. mutans biofilm growth revealed statistically significant differences (p < 0.05) between 2 and 3 h sulfonation groups. A significant decrease (p < 0.05) in CFU mL{sup −1} was recorded for S. mutans or E. faecalis biofilm grown on 2.5 or 3 h sPEEK. Regarding the thermal-chemical and microbiologic analyses, the sulfonation degree of sPEEK ranging from 2 up to 3 h was successful capable to decrease the biofilm growth. That revealed an alternative strategy to embed anti-biofilm and therapeutic compounds into PEEK avoiding infections in biomedical applications. - Highlights: • PEEK can be dissolved to incorporate therapeutic compounds. • High sulfonation degree on sPEEK affected the biofilm growth. • The sulfonation degree must be controlled to maintain the properties of sPEEK.

  15. Ameerikasse õppima ja õpetama / Kadriliis Speek ; küsitlenud Sirje Tohver

    Index Scriptorium Estoniae

    Speek, Kadriliis

    2008-01-01

    Küsimustele vastab Tartu Descartes'i lütseumi lõpetanud ja kolm aastat Tallinna ülikoolis prantsuse keelt õppinud ja seejärel Ameerikasse elama asunud Kadriliis Speek. Ameerikas elamisest, töötamisest ja õppimisest

  16. Polymeric membranes obtained from S-PEEK for application in PEM fuel cells; Caracterizacao de membranas polimericas obtidas a partir dos S-PEEK para aplicacao em celulas combustiveis do tipo PEM

    Energy Technology Data Exchange (ETDEWEB)

    Barreto, Ednardo G.; Fiuza, Raildo A.; Catao, Ronei S.; Jose, Nadia M.; Boaventura, Jaime S. [Universidade Federal da Bahia (UFBA), Salvador, BA (Brazil). Inst. de Quimica], e-mail: ednardobarreto@yahoo.com.br, e-mail: raildofiuza@gmail.com, e-mail: roneicatao@ig.com.br, e-mail: nadia@ufba.br, e-mail: bventura@ufba.br; Pepe, Yuri [Universidade Federal da Bahia (UFBA), Salvador, BA (Brazil). Inst. de Fisica

    2007-07-01

    This work had the objective to develop and to characterize S-PEEK membranes (sulfonated poly ether ether ketone) through chemical and electrochemical analyses. Conductivity test in function of the frequency and tension had been carried through; as well as, the open circuit tension of a fuel cell using the S-PEEK as electrolyte. Additional tests included TGA (Thermogravimetric Analysis), water absorption test, DSC (Differential Scanning Calorimetry), as tools to characterize conducting, thermal and mechanical proprieties of polymeric membrane. (author)

  17. Sulfonation degree effect on ion-conducting SPEEK-titanium oxide membranes properties

    Energy Technology Data Exchange (ETDEWEB)

    Marrero, Jacqueline Costa; Gomes, Ailton de Souza; Dutra Filho, José Carlos, E-mail: jacquecosta@gmail.com [Universidade Federal do Rio de Janeiro (IMA/UFRJ), RJ (Brazil). Instituto de Macromoléculas Professora Eloisa Mano; Hui, Wang Shu [Universidade de São Paulo (USP), São Paulo, SP (Brazil). Departamento de Engenharia Metalúrgica e de Materiais; Oliveira, Vivianna Silva de [Escola Técnica Rezende Rammel (ETRR), Rio de Janeiro, RJ (Brazil)

    2017-07-01

    Polymeric membranes were developed using a SPEEK (sulfonated poly(ether ether ketone)) polymer matrix, containing titanium oxide (TiO{sub 2}) (incorporated by sol-gel method). SPEEK with different sulfonation degrees (SD): 63% and 50% were used. The influence of sulfonation degree on membrane properties was investigated. The thermal analysis (TGA and DTGA) and X-ray diffraction (XRD) were carried out to characterize the membranes and electrochemical impedance spectroscopy (EIS) was carried out to evaluate the proton conductivity of the membranes. The proton conductivities in water were of 3.25 to 37.08 mS.cm{sup -1}. Experimental data of impedance spectroscopy were analyzed with equivalent circuits using the Zview software, and the results showed that, the best fitted was at 80 °C. (author)

  18. Nanostructured Polyelectrolytes Based on SPEEK/TiO2 for Direct Ethanol Fuel Cells (DEFCs

    Directory of Open Access Journals (Sweden)

    José Carlos Dutra Filho

    2014-01-01

    Full Text Available Proton-conducting hybrid membranes consisting of poly(ether ether ketone sulfonated (SPEEK and titanium oxide (TiO2 were prepared using the sol-gel technique for application in direct ethanol fuel cells. The effect from TiO2 incorporation on membrane properties such as ethanol uptake, pervaporation and proton conductivity was investigated. The uptake and permeated flux decreased with increasing content of TiO2. The ethanol permeability was about one order of magnitude smaller than Nafion® 117. FTIR spectra indicated that PEEK was sulfonated and the second degradation temperature of SPEEK58 samples confirmed the titanium oxide incorporation. The proton conductivity in ethanol solution was of the order of 10-3 S cm-1 when 4 or 8 wt% TiO2 were added, and generally increased with addition of TiO2.

  19. Nanostructured Polyelectrolytes Based on SPEEK/TiO2 for Direct Ethanol Fuel Cells (DEFCs)

    OpenAIRE

    Dutra Filho, José Carlos; Santos, Tamirys Rodrigues dos; Gomes, Aílton de Souza

    2014-01-01

    Proton-conducting hybrid membranes consisting of poly(ether ether ketone) sulfonated (SPEEK) and titanium oxide (TiO2) were prepared using the sol-gel technique for application in direct ethanol fuel cells. The effect from TiO2 incorporation on membrane properties such as ethanol uptake, pervaporation and proton conductivity was investigated. The uptake and permeated flux decreased with increasing content of TiO2. The ethanol permeability was about one order of magnitude smaller than Nafion® ...

  20. Effect of cesium salt of tungstophosphoric acid (Cs-TPA) on the properties of sulfonated polyether ether ketone (SPEEK) composite membranes for fuel cell applications

    Energy Technology Data Exchange (ETDEWEB)

    Dogan, Hacer; Inan, Tuelay Y.; Unveren, Elif [The Scientific and Technological Research Council of Turkey (TUeBiTAK), Marmara Research Center, Chemistry Institute, P.K. 21, 41470 Gebze-Kocaeli (Turkey); Kaya, Metin [DEMIRDOeKUeM A.S. 4 Eyluel Mah, ismet inoenue Cad. No:245 Bozueyuek/Bilecik (Turkey)

    2010-08-15

    We have prepared composite membranes for fuel cell applications. Cesium salt of tungstophosphoric acid (Cs-TPA) particles was synthesized by aqueous solutions of tungstophosphoric acid and cesium hydroxide and, Cs-TPA particles and sulfonated (polyether ether ketone) (SPEEK) with two sulfonation degrees (DS), 60 and 70%have been used. We examined both the effects of Cs-TPA in SPEEK membranes as functions of sulfonation degrees of SPEEK and the content of Cs-TPA. The performance of the composite membranes was evaluated in terms of water uptake, ion exchange capacity, proton conductivity, chemical stability, hydrolytic stability, thermal stability and methanol permeability. The morphology of the membranes was investigated with SEM micrographs. Increasing sulfonation degree of SPEEK from 60 to 70 caused agglomeration of the Cs-TPA particles. The methanol permeability was reduced to 4.7 x 10{sup -7} cm{sup 2}/s for SPEEK (DS: 60%)/Cs-TPA membrane with 10 wt.% Cs-TPA concentration, and acceptable proton conductivity of 1.3 x 10{sup -1} S/cm was achieved at 80 C under 100% RH. The weight loss at 900 C increased with the addition of inorganic particles, as expected. The hydrolytic stability of the SPEEK/Cs-TPA based composite membranes was improved with the incorporation of the Cs-TPA particles into the matrix. We also noted that SPEEK60/Cs-TPA composite membranes were hydrolytically more stable than SPEEK70/Cs-TPA composite membranes. On the other hand, Methanol, water vapor, and hydrogen permeability values of SPEEK60 composite membranes were found to be lower than that of Nafion {sup registered}. (author)

  1. Preliminary Study of the Use of Sulphonated Polyether Ether Ketone (SPEEK as Proton Exchange Membrane for Microbial Fuel Cell (MFC

    Directory of Open Access Journals (Sweden)

    Dani Permana

    2018-02-01

    Full Text Available Sulfonated polyether ether ketone (SPEEK was utilized as a proton exchange membrane (PEM in Microbial Fuel Cell (MFC. The SPEEK performance in producing electricity had been observed in MFC using wastewater and glucose as substrates. The MFC with catering and tofu wastewater produced maximum power density about 0.31 mW/m2 and 0.03 mW/m2, respectively, lower that of MFC with tapioca average power density of 39.4 W/m2 over 48 h. The power density boosted because of the presence of Saccharomyces cerevisiae as inoculum. The study using of S. cerevisiae and Acetobacter acetii, separately, were also conducted in with glucose as substrate. The MFC produced an average power densities were 7.3 and 6.4 mW/m2 for S. cerevisiae and A. acetii, respectively. The results of this study indicated that SPEEK membrane has the potential usage in MFCs and can substitute the commercial membrane, Nafion. Article History: Received: Juni 14th 2017; Received: Sept 25th 2017; Accepted: December 16th 2017; Available online How to Cite This Article: Putra, H.E., Permana, D and Djaenudin, D. (2018 Preliminary Study of the Use of Sulfonated Polyether Ether Ketone (SPEEK as Proton Exchange Membrane for Microbial Fuel Cell (MFC. International Journal of Renewable Energy Development, 7(1, 7-12. https://doi.org/10.14710/ijred.7.1.7-12

  2. Synthesis and Characterization of Sulfonated Graphene Oxide Reinforced Sulfonated Poly (Ether Ether Ketone (SPEEK Composites for Proton Exchange Membrane Materials

    Directory of Open Access Journals (Sweden)

    Ning Cao

    2018-03-01

    Full Text Available As a clean energy utilization device, full cell is gaining more and more attention. Proton exchange membrane (PEM is a key component of the full cell. The commercial-sulfonated, tetrafluoroethylene-based fluoropolymer-copolymer (Nafion membrane exhibits excellent proton conductivity under a fully humidified environment. However, it also has some disadvantages in practice, such as high fuel permeability, a complex synthesis process, and high cost. To overcome these disadvantages, a low-cost and novel membrane was developed. The sulfonated poly (ether ether ketone (SPEEK was selected as the base material of the proton exchange membrane. Sulfonated graphene (SG was cross-linked with SPEEK through the elimination reaction of hydrogen bonds. It was found that the sulfonic acid groups and hydrophilic oxygen groups increased obviously in the resultant membrane. Compared with the pure SPEEK membrane, the SG-reinforced membrane exhibited better proton conductivity and methanol permeability prevention. The results indicate that the SG/SPEEK could be applied as a new proton exchange membrane in fuel cells.

  3. A new interpretation of SAXS peaks in sulfonated poly(ether ether ketone) (sPEEK) membranes for fuel cells.

    Science.gov (United States)

    Mendil-Jakani, H; Zamanillo Lopez, I; Legrand, P M; Mareau, V H; Gonon, L

    2014-06-21

    The structure of a commercial sulfonated poly(ether ether ketone) (sPEEK) membrane was analyzed by Small-Angle X-Ray Scattering (SAXS) for different water uptakes obtained after immersion in liquid water at various temperatures. For low membrane swelling, the SAXS profile displays only a wide-angle peak in the 0.2-0.3 Å(-1) region. As the membrane swells, two supplementary correlation peaks arise and shift towards small angles, which are the signature of a structural evolution of the membrane, whereas the wide angle peak remains stable. The SAXS spectra of sPEEK membranes can thus display three correlation peaks simultaneously. Therefore we propose a new interpretation of these SAXS spectra which conclude that the two small angle peaks are attributed to the so-called matrix and ionomer peaks and the wide-angle peak is ascribed to the mean separation distance between sulfonic acid groups grafted onto the polymer backbone. This peak attribution implies that the sPEEK nano-phase separation is triggered by an immersion in hot water (ionomer peak apparition). Our new peak attribution was confirmed by studying the impact of temperature, electron density contrast and ionic exchange capacity.

  4. Preparation and characterization of polymer blend based on sulfonated poly (ether ether ketone) and polyetherimide (SPEEK/PEI) as proton exchange membranes for fuel cells

    Energy Technology Data Exchange (ETDEWEB)

    Hashim, Nordiana; Ali, Ab Malik Marwan [Ionic Material and Devices Research Laboratory, Institute of Science, Universiti Teknologi MARA, 40450 Shah Alam (Malaysia); Lepit, Ajis; Rasmidi, Rosfayanti [Faculty of Applied Sciences, Universiti Teknologi MARA Sabah, Beg Berkunci 71, 88997 Kota Kinabalu (Malaysia); Subban, Ri Hanum Yahaya [Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam (Malaysia); Institute of Science, Universiti Teknologi MARA, 40450 Shah Alam (Malaysia); Yahya, Muhd Zu Azhan [Faculty of Defence Science & Technology, Universiti Pertahanan Nasional Malaysia, 57000 Kuala Lumpur (Malaysia)

    2015-08-28

    Blends of sulfonated poly (ether ether ketone) (SPEEK) and polyetherimide (PEI) were prepared in five different weight ratios using N-methyl-2-pyrrolidone (NMP) as solvent by the solution cast technique. The degree of sulfonation (DS) of the sulfonated PEEK was determined from deuterated dimethyl sulfoxide (DMSO-d{sub 6}) solution of the purified polymer using {sup 1}H NMR method. The properties studied in the present investigation includes conductivity, water uptake, thermal stability and structure analysis of pure SPEEK as well as SPEEK-PEI polymer blend membranes. The experimental results show that the conductivity of the membranes increased with increase in temperature from 30 to 80°C, except for that of pure SPEEK membrane which increased with temperature from 30 to 60°C while its conductivity decreased with increasing temperature from 60 to 80°C. The conductivity of 70wt.%SPEEK-30wt.%PEI blend membrane at 80% relative humidity (RH) is found to be 1.361 × 10{sup −3} Scm{sup −1} at 30°C and 3.383 × 10{sup −3} Scm{sup −1} at 80°C respectively. It was also found that water uptake and thermal stability of the membranes slightly improved upon blending with PEI. Structure analysis was carried out using Fourier Transform Infrared (FTIR) spectroscopy which revealed considerable interactions between sulfonic acid group of SPEEK and imide groups of PEI. Modification of SPEEK by blending with PEI shows good potential for improving the electrical and physical properties of proton exchange membranes.

  5. A study of new anhydrous, conducting membranes based on composites of aprotic ionic liquid and cross-linked SPEEK for fuel cell application

    International Nuclear Information System (INIS)

    Malik, Rajender Singh; Verma, Pawan; Choudhary, Veena

    2015-01-01

    Highlights: • New composite membranes based on SPEEK/EG/IL were fabricated. • Composite membranes exhibit good thermal stability than neat SPEEK and XSPEEK membrane. • Proton conductivity of all composite membranes increased with temperature and amount of ionic liquid. • Proton conductivity was measured under anhydrous condition in the temperature ranging from 30–140 °C. - Abstract: The present study describe the preparation and characterisation of anhydrous proton conducting composite membranes based on sulfonated poly(ether ether ketone) [SPEEK–degree of sulfonation 70–72%]/ethylene glycol [EG]/ionic liquid by solution casting method using water: ethanol (50:50) as solvent. For this purpose several composite membranes were prepared by mixing solution of SPEEK/ethylene glycol (67:33 wt %) in water:ethanol with varying amounts of 1-butyl-3-methyl-imidazolium trifluromethanesulfonate [bmim][OTf] ionic liquid. The cross-linking of SPEEK was carried out by thermal treatment i.e. by heating in vacuum oven at 80 °C (2 h), 100 °C (2 h), 120 °C (2 h) and 135 °C for 16 h. Ethylene glycol was used as a cross-linker for SPEEK to reduce the leaching out of ionic liquid and enhance the mechanical strength of SPEEK membranes. The membranes were characterized for thermal [thermogravimetry analysis], structural [FTIR–ATR], proton conductivity, morphology (XRD, SEM) and leaching out of ionic liquid with water. FTIR studies clearly showed the interactions between SPEEK, EG and ionic liquid. The proton conductivity and dynamic mechanical properties of the composite membranes were investigated at elevated temperature and under anhydrous conditions. Proton conductivity of all the membranes measured in the temperature range of 30–140 °C under anhydrous conditions was in the range of 10 −3 Scm −1 which showed an increase with increase in temperature and amount of ionic liquid

  6. Es war einmal ... : raamatunäitus baltisaksa kirjandusest / Sirje Lusmägi, Tiiu Reimo

    Index Scriptorium Estoniae

    Lusmägi, Sirje, 1952-

    2012-01-01

    2011. a augustis Tallinnas toimunud baltisaksa kultuuripäevade raames avati Tallinna Keskraamatukogus ka raamatunäitus, korraldajaks Baltisaksa Kultuuri Selts Eestis. Näituse koostasid Sirje Lusmägi ja Tiiu Reimo RR-i ja TLÜAR-i kogude põhjal

  7. Tiiu Ernitsa doktoritöö muusikakasvatusest baltisaksa koolides / Ingrid Rüütel

    Index Scriptorium Estoniae

    Rüütel, Ingrid, 1935-

    2014-01-01

    16. mail 2013. a. kaitses Tiiu Ernits Tallinna Ülikooli Kasvatusteaduste Instituudis doktoritööd "Muusikaõppekirjandus ja laulmisõpetus saksa õppekeelega koolides Eestis aastatel 1860-1914" ("Music Education Literature and Teaching of Singing in Schools with German as the language of Instruction in Estonia 1860-1914")

  8. Enhancement of Hybrid SPEEK Based Polymer–Cyclodextrin-Silica Inorganic Membrane for Direct Methanol Fuel Cell Application

    Directory of Open Access Journals (Sweden)

    Tutuk Djoko Kusworo

    2017-06-01

      Keywords: Direct Methanol Fuel Cell, Poly(ether ether ketone, cyclodextrin-silica, sulfonation, ionic conductivity. Article History: Received January 18th 2017; Received in revised form April 21st 2017; Accepted June 22nd 2017; Available online How to Cite This Article: Kusworo, T.D., Hakim, M.F. and Hadiyanto, H. (2017 Enhancement of Hybrid SPEEK Based Polymer–Cyclodextrin-Silica Inorganic Membrane for Direct Methanol Fuel Cell Application. International Journal of Renewable Energy Development, 6(2, 165-170. https://doi.org/10.14710/ijred.6.2.165-170

  9. Estudo das propriedades térmicas de filmes poliméricos compostos de Speek, derivados do benzoimidazol e ácido fosfotúngstico Thermal properties of Speek-based polymeric films containing benzimidazole derivatives and fosfotungstic acid

    Directory of Open Access Journals (Sweden)

    Fabrício Celso

    2008-06-01

    Full Text Available Filmes poliméricos foram desenvolvidos a partir de poli (éter éter cetona sulfonado (SPEEK, derivados do benzoimidazol e ácido fosfotúngstico (HPW. Neste trabalho foi realizado um estudo utilizando a análise termogravimétrica com o objetivo de avaliar a estabilidade térmica e determinar as condições de temperatura a que podem ser submetidos os filmes produzidos, tendo em vista a aplicação de tais filmes como membranas em células a combustível. Os resultados obtidos mostram que a estabilidade térmica é afetada pela composição dos filmes. A maioria dos filmes se mostrou estável até 140 °C.Polymeric films were developed from sulfonated poly(ether ether ketone (SPEEK, benzimidazole derivatives and phosphotungstic acid (HPW. In this study, thermogravimetric analysis was performed with the aim of evaluating the temperature conditions to which polymeric films can be submitted. The results showed that thermal stability depended on film composition and the majority of the tested films showed to be stable up to 140 °C.

  10. Development of a measuring system for poloidal field profile in JIPP T-IIU plasmas

    International Nuclear Information System (INIS)

    Kuramoto, Hideharu; Hiraki, Naoji; Moriyama, Shin-ichi; Toi, Kazuo; Sato, Kuninori.

    1995-01-01

    A Zeeman polarimeter has been developed to measure the poloidal magnetic field profile in the plasma edge of the JIPP T-IIU tokamak. The poloidal field strength is determined from the analysis of circular polarization of a HeII 4686A spectral lines emitted from a plasma. The polarization modulation rate, which is proportional to the magnetic field strength along a line of sight, is estimated as a ratio of the difference between the left-hand circular polarized line intensity and right-hand one to the sum of them. A newly developed fast scanning Fabry-Perot interferometer allows us to improve a time resolution up to 1.5 ms. The poloidal magnetic field profile in He-doped deuterium plasmas of JIPP T-IIU has been successfully obtained with this polarimeter system. (author)

  11. Membranes optimization of the basis of S-peek with different degrees of sulfonation for PEMFC; Otimizacao de membranas a base de S-peek com diferentes graus de sulfonacao para PEMFC

    Energy Technology Data Exchange (ETDEWEB)

    Barreto, E.B.; Fiuza, R.A.; Jose, N.M.; Boaventura, J.S.; Carvalho, L.F.V. [Universidade Federal da Bahia (IQ/UFBA), Salvador, BA (Brazil). Inst. de Quimica. Grupo de Energia e Ciencia dos Materiais

    2008-07-01

    With the growing concern emission of polluting gases in the atmosphere and search for alternative sources of clean energy that can meet the future shortage of oil, the fuel cells have become the target of scientific research in everyone. Among the various types of fuel cells includes the PEMFC (Polymer exchange membrane fuel cell), in the case of a device with high efficiency, without emission of pollutants. This work was to produce membranes and optimizing the basis of S-PEEK (poly-ether-ether-sulfonate) with varying degrees of sulfonation to be applied as electrolytes in fuel cells to the type PEMFC. The membranes were characterized chemically, by thermal analysis, and electrochemistry. (author)

  12. SPEEK-MO{sub 2} (M = Zr, Sn) composite membranes for direct ethanol fuel cell: an inorganic modification of proton conductive

    Energy Technology Data Exchange (ETDEWEB)

    Kawaguti, Carla A.; Gomes, Ailton S. [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Inst. de Macromoleculas Eloisa Mano], e-mail: kawagutica@gmail.com

    2007-07-01

    Organic-inorganic composite membranes based on sulfonated poly(ether ether ketone) (SPEEK) for application in the direct ethanol fuel cell (DEFC) were synthesized. Particle of sulfated zirconia/tin oxide (SO{sub 4}{sup 2-}/ZrO{sub 2}, SnO{sub 2}, SO{sub 3}-/SnO{sub 2}) was synthesized by sol-gel method, and composite membranes with different oxide and different oxide contents were prepared from a mixture of SO{sub 4}{sup 2-}/ZrO{sub 2} or SnO{sub 2} or SO{sub 3}-/SnO{sub 2} powder and SPEEK solution. The physico-chemical properties of the membranes were studied by water or ethanol solution uptake measurements, scanning electron microscopy (SEM), the membrane's water and ethanol permeabilities were evaluated in pervaporation experiments and the conductivity determined by impedance spectroscopy. The ethanol permeabilities were decreased by inorganic modification. At several temperatures analysed, all SPEEK-MO{sub 2} composite exhibited better ethanol solution uptake than water uptake and this sorption is decreased when inorganic particles are add. A reduction of the proton conductivity by the inorganic modification was observed. (author)

  13. Fast cooling phenomena with ice pellet injection in the JIPP T-IIU Tokamak

    International Nuclear Information System (INIS)

    Sakamoto, M.; Sato, K.N.; Ogawa, Y.

    1991-01-01

    Ice pellet injection experiments were carried out in the JIPP T-IIU Tokamak in order to study thermal (cooling) transport just after injection. The cut-off problem of ECE signals due to the rise in density has been resolved by careful measurements of the temperature profile at a high time resolution (Δt = 2μs) during its decay phase. The phenomenon of ultra-fast cooling (so-called pre-cooling) has been identified using the two different methods of ECE and soft X-ray (SXR) measurements. In the outer region (r > r q=1 ) of the plasma the cooling propagation velocity is comparable to or slightly greater than the pellet velocity, while in the central region (r q=1 ) the propagation velocity is significantly greater than the pellet velocity. Ice pellets were injected into various kinds of JIPP T-IIU plasmas, the current and sawtooth phase of which had different values, including a no-sawtooth plasma. The existence of the q = 1 surface and arrival of a pellet near the q = 1 surface have turned out to be necessary conditions for pre-cooling, and even just after the sawtooth crash the pre-cooling starts around the q = 1 surface, not at the plasma center. Simultaneous measurements of electron temperature and density profiles indicate that the central temperature always decreases before the central density increases. Some anomalous transport might be induced by pellet injection at the central region. (Author)

  14. Friedel–Crafts Crosslinked Highly Sulfonated Polyether Ether Ketone (SPEEK Membranes for a Vanadium/Air Redox Flow Battery

    Directory of Open Access Journals (Sweden)

    Géraldine Merle

    2013-12-01

    Full Text Available Highly conductive and low vanadium permeable crosslinked sulfonated poly(ether ether ketone (cSPEEK membranes were prepared by electrophilic aromatic substitution for a Vanadium/Air Redox Flow Battery (Vanadium/Air-RFB application. Membranes were synthesized from ethanol solution and crosslinked under different temperatures with 1,4-benzenedimethanol and ZnCl2 via the Friedel–Crafts crosslinking route. The crosslinking mechanism under different temperatures indicated two crosslinking pathways: (a crosslinking on the sulfonic acid groups; and (b crosslinking on the backbone. It was observed that membranes crosslinked at a temperature of 150 °C lead to low proton conductive membranes, whereas an increase in crosslinking temperature and time would lead to high proton conductive membranes. High temperature crosslinking also resulted in an increase in anisotropy and water diffusion. Furthermore, the membranes were investigated for a Vanadium/Air Redox Flow Battery application. Membranes crosslinked at 200 °C for 30 min with a molar ratio between 2:1 (mol repeat unit:mol benzenedimethanol showed a proton conductivity of 27.9 mS/cm and a 100 times lower VO2+ crossover compared to Nafion.

  15. Friedel–Crafts Crosslinked Highly Sulfonated Polyether Ether Ketone (SPEEK) Membranes for a Vanadium/Air Redox Flow Battery

    Science.gov (United States)

    Merle, Géraldine; Ioana, Filipoi Carmen; Demco, Dan Eugen; Saakes, Michel; Hosseiny, Seyed Schwan

    2014-01-01

    Highly conductive and low vanadium permeable crosslinked sulfonated poly(ether ether ketone) (cSPEEK) membranes were prepared by electrophilic aromatic substitution for a Vanadium/Air Redox Flow Battery (Vanadium/Air-RFB) application. Membranes were synthesized from ethanol solution and crosslinked under different temperatures with 1,4-benzenedimethanol and ZnCl2 via the Friedel–Crafts crosslinking route. The crosslinking mechanism under different temperatures indicated two crosslinking pathways: (a) crosslinking on the sulfonic acid groups; and (b) crosslinking on the backbone. It was observed that membranes crosslinked at a temperature of 150 °C lead to low proton conductive membranes, whereas an increase in crosslinking temperature and time would lead to high proton conductive membranes. High temperature crosslinking also resulted in an increase in anisotropy and water diffusion. Furthermore, the membranes were investigated for a Vanadium/Air Redox Flow Battery application. Membranes crosslinked at 200 °C for 30 min with a molar ratio between 2:1 (mol repeat unit:mol benzenedimethanol) showed a proton conductivity of 27.9 mS/cm and a 100 times lower VO2+ crossover compared to Nafion. PMID:24957118

  16. Friedel-Crafts Crosslinked Highly Sulfonated Polyether Ether Ketone (SPEEK) Membranes for a Vanadium/Air Redox Flow Battery.

    Science.gov (United States)

    Merle, Géraldine; Ioana, Filipoi Carmen; Demco, Dan Eugen; Saakes, Michel; Hosseiny, Seyed Schwan

    2013-12-30

    Highly conductive and low vanadium permeable crosslinked sulfonated poly(ether ether ketone) (cSPEEK) membranes were prepared by electrophilic aromatic substitution for a Vanadium/Air Redox Flow Battery (Vanadium/Air-RFB) application. Membranes were synthesized from ethanol solution and crosslinked under different temperatures with 1,4-benzenedimethanol and ZnCl2 via the Friedel-Crafts crosslinking route. The crosslinking mechanism under different temperatures indicated two crosslinking pathways: (a) crosslinking on the sulfonic acid groups; and (b) crosslinking on the backbone. It was observed that membranes crosslinked at a temperature of 150 °C lead to low proton conductive membranes, whereas an increase in crosslinking temperature and time would lead to high proton conductive membranes. High temperature crosslinking also resulted in an increase in anisotropy and water diffusion. Furthermore, the membranes were investigated for a Vanadium/Air Redox Flow Battery application. Membranes crosslinked at 200 °C for 30 min with a molar ratio between 2:1 (mol repeat unit:mol benzenedimethanol) showed a proton conductivity of 27.9 mS/cm and a 100 times lower VO2+ crossover compared to Nafion.

  17. Kättemaksu tund läheneb - hangunud verele ülesklopsitud röövriik hävib! : vastupanuliikumise salatrükikoda "Punker Tiiu" Kambja vallas 1947.-1948. aastal / Tiit Noormets

    Index Scriptorium Estoniae

    Noormets, Tiit, 1959-

    2006-01-01

    Põrandaaluse salatrükikoja أPunker Tiiuؤ (1947-1948) tegevusest, lendlehtede levitamisest Tartumaal. Dokument: "Väljavõte ENSV RJM Tartu linna osakonna 2-N jaoskonna tööaruandest 1949. a. septembrikuu kohta"

  18. Produção de membranas híbridas zirconizadas de SPEEK/Copolissilsesquioxano para aplicação em células a combustível do tipo PEM Production of Zirconized SPEEK/Copolysilsesquioxane hybrid membranes for application in Proton Exchange Membrane fuel cells

    Directory of Open Access Journals (Sweden)

    Kelen R. Aguiar

    2012-01-01

    Full Text Available Membranas baseadas em poli(aril éter cetona sulfonada mostraram ser bastante promissoras para aplicação em células a combustível com membrana trocadora de prótons (PEMFC. O poli(éter-éter-cetona sulfonado (SPEEK, com elevado grau de sulfonação (GS, apresenta alta condutividade de prótons, mas sofre perda de funcionalidade e condutividade em temperaturas altas e umidades baixas. O desenvolvimento de membranas híbridas é uma das possibilidades para melhorar o desempenho destes materiais. Neste trabalho foram preparadas membranas híbridas zirconizadas de SPEEK/copolissilsesquioxano fosfonado (CF por casting, a partir de SPEEK com GS entre 60% e 70% e soluções de cloreto de zirconila (ZrOCl2 1, 5, ou 10% (m/m. As membranas foram caracterizadas por espectroscopia na região do infravermelho (FTIR, difratometria de raios-X (DRX, análise termogravimétrica (TG, calorimetria exploratória diferencial (DSC, condutividade de prótons (σ e microscopia eletrônica de varredura (MEV. A análise por energia dispersiva (EDS confirmou a presença de Zr em domínios esféricos dispersos homogeneamente pelas membranas, enquanto análises de DRX mostraram que os produtos da zirconização são amorfos. Ensaios de impedância eletroquímica indicam aumento da condutividade protônica com a adição de CF e 1 ou 5% de ZrOCl2.Membranes based on sulfonated poly(aryl ether ketone are known to be very promising materials for Proton Exchange Membrane Fuel Cells (PEMFC. Sulfonated poly(ether-ether-ketone (SPEEK, with high sulfonation degrees (SD, present high proton conductivity. However, they lose functionality and conductivity at high temperatures and low humidity. To enhance the performance of these materials, hybrid membranes have gained considerable attention. In this work, zirconized SPEEK/phosphonated copolysilsesquioxane (CF hybrid membranes were prepared by casting, from SPEEK (60% < SD < 70% and 1, 5, or 10 wt. (% zirconyl chloride solutions

  19. Mis saab eesti gümnaasiumist? / Igor Garšnek, Linnar Priimägi, Tiiu Purdelo ; vestluse pani kirja Raivo Juurak

    Index Scriptorium Estoniae

    Garšnek, Igor, 1958-

    2008-01-01

    Riigikirjandi drillimise asemel on vaja hakata gümnaasiumis süvendatult õppima valikaineid, leiavad TLÜ õppejõud Linnar Priimägi, Eesti Kunstiakadeemia õppejõud Igor Garšnek ja SA Õiguskolledži asutaja Tiiu Purdelo

  20. [Valitsusliidus olevad Reformierakond ning Isamaa ja Res Publica Liit on kavandatava koolireformi suhtes eri meelt] / Mailis Reps, Tiiu Kuurme, Karin Kütt

    Index Scriptorium Estoniae

    Reps, Mailis, 1975-

    2010-01-01

    Reformierakonna ettepaneku kohta jätta omavalitsustele õiguse otsustada, kas gümnaasium ja põhikool lahutatakse või jätkatakse ühendkooliga avaldavad arvamust riigikogu liige Mailis Reps, Tallinna Ülikooli dotsent Tiiu Kuurme ja Rannu keskkooli direktor Karin Kütt

  1. Experimental characteristics of ion Bernstein wave heating on JIPP T-IIU tokamak

    International Nuclear Information System (INIS)

    Ogawa, Y.; Kawahata, K.; Ando, R.

    1986-03-01

    The directly launched Ion Bernstein Wave (IBW) heating experiments have been carried out on JIPP T-IIU tokamak for two experimental conditions; (a) the ''3rd-branch'' of the IBW between 3rd- and 4th-cyclotron harmonics of the deuterium, and (b) the ''2nd-branch'' of the IBW between 2nd- and 3rd-cyclotron harmonics. In the case (a), the direct hydrogen heating at ω = 1.5 Ω H has been found in previous experiments. Here we present additional data to support this subharmonics heating, i.e., the spectroscopic measurement of Fe XVIII lines and mass separated analysis of charge-exchange neutrals. While, in the case (b), the remarkable increase of the electron temperature has been observed, especially at the central region of the plasma, and it has been estimated from the global energy balance that almost all of IBW power is delivered to the electron. To investigate this difference of the heating mode, the power absorption has been calculated with the ray tracing code, taking into account of the effect of the plasma/antenna coupling. It is concluded from the consideration of the electron Landau damping that the transition from the ion heating mode to the electron one would be explained by the difference of the electron temperature at the ohmic phase; i.e., T e (0) = 0.7 keV for the case (a) and T e (0) = 1.3 keV for the case (b). (author)

  2. High frequency ion Bernstein wave heating experiment on JIPP T-IIU tokamak

    International Nuclear Information System (INIS)

    Seki, T.; Kumazawa, R.; Watari, T.

    1992-08-01

    An experiment in a new regime of ion Bernstein wave (IBW) heating has been carried out using 130 MHz high power transmitters in the JIPP T-IIU tokamak. The heating regime utilized the IBW branch between the 3rd and 4th harmonics of the hydrogen ion cyclotron frequencies. This harmonic number is the highest among those used in the IBW experiments ever conducted. The net radio-frequency (RF) power injected into the plasma is around 400 kW, limited by the transmitter output power. Core heating of ions and electrons was confirmed in the experiment and density profile peaking was found to feature the IBW heating (IBWH). The peaking of the density profile was also found when IBW was applied to the neutral beam injection heated discharges. An analysis by use of a transport code with these experimental data indicates that the particle confinement should be improved in the plasma core region on the application of IBWH. It is also found that the ion energy distribution function observed during IBWH has less high energy tail than those in conventional ion cyclotron range of frequency heating regimes. The observed IBWH-produced ion energy distribution function is in a reasonable agreement with the calculation based on the quasi-linear RF diffusion / Fokker-Planck model. (author)

  3. Pellet ablation and cloud flow characteristics in the JIPP T-IIU plasma with the injection-angle controllable system

    International Nuclear Information System (INIS)

    Sakakita, H.; Sato, K.N.; Liang, R.; Hamada, Y.; Ando, A.; Kano, Y.; Sakamoto, M.

    1994-01-01

    Pellet ablation and flow characteristics of ablation cloud have been studied in the JIPP T-IIU plasma by using an injection-angle controllable system. A new technique for an ice pellet injection system with controllability of injection angle has been developed and installed to the JIPP T-IIU tokamak in order to vary deposition profile of ice pellets within a plasma. Injection angle can be varied easily and successfully during an interval of two plasma shots in the course of an experiment, so that one can carry out various basic experiments by varying the pellet deposition profile. The injection angle has been varied poloidally from -6 to 6 degree by changing the angle of the last stage drift tube. This situation makes possible for pellets to aim at from about r = -2a/3 to r = 2a/3 of the plasma. From two dimensional observations by CCD cameras, details of the pellet ablation structures with various injection angles have been studied, and a couple of interesting phenomena have been found. In the case of an injection angle (θ) larger than a certain value (θ ≥ 4 o ), a pellet penetrates straightly through the plasma with a trace of straight ablation cloud, which has been expected from usual theoretical consideration. On the other hand, a long helical tail of ablation light has been observed in the case of the angle smaller than the certain value (θ ≤ 4 o ). (author) 4 refs., 4 figs

  4. Obtenção e avaliação das propriedades físico-químicas de membranas poliméricas SPEEK/PANI de condução mista

    OpenAIRE

    Jesus, Jerusa Roeder

    2005-01-01

    Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciencias Fisicas e Matematicas. Programa de Pós-graduação em Química A mistura física entre polímero condutor protônico, poli(éter éter cetona) sulfona [SPEEK], e polímero condutor eletrônico, polianilina [PANI], pode levar a obtenção de membranas de condução mista. O foco deste trabalho foi à obtenção e avaliação das propriedades físico-químicas de membranas poliméricas SPEEK/PANI de condução mista para aplicação na inte...

  5. Plasma current startup by lower hybrid waves in the JIPP T-IIU tokamak

    International Nuclear Information System (INIS)

    Toi, K.; Ohkubo, K.; Kawahata, K.

    1987-04-01

    This paper describes the characteristic behaviours of lower hybrid current startup in JIPP T-IIU. The current startup is carried out by injection of 800 MHz lower hybrid waves into cold and low density plasmas (Te = 10 - 20 eV, n-bar e = 1 - 2 x 10 12 cm -3 ) produced by electron cyclotron resonance or lower hybrid waves only. The plasma current rises up with a characteristic rise time τ r (> approx 30 - 50 ms) and approaches a quasi-steady state value I pm (= 5 - 20 kA), when LHW power of 10 - 50 kW is injected into a torus, controlling the vertical field. The rise time is inversely proportional to the bulk electron density n-bar e , and is comparable to the collision time of current-carrying high energy electrons with bulk plasmas. On the other hand, the current drive efficiency in the quasi-steady state is almost independent of n-bar e , i.e., I pm /P LH = 0.4 - 0.7 A/W for n-bar e = 0.8 - 4 x 10 12 cm -3 . The conversion efficiency of rf energy injected into the torus is typically 5 % during current rise phase, and 10 % at the most efficient case. The effects of the initial injection of ECH power and the observed parametric instabilities on the current startup are investigated from a viewpoint of seed current generation. During rapid current rise when appreciably negative loop voltage is observed the bulk electrons are heated up to 150 eV. Various heating mechanisms responsible for the bulk electron heating are discussed. (author)

  6. Power absorption and confinement studies of ICRF-heated plasma in JIPP T-IIU tokamak

    International Nuclear Information System (INIS)

    Ida, K.; Ogawa, Y.; Toi, K.

    1988-08-01

    The energy confinement characteristics of ICRF-heated tokamak plasmas are studied at high input power density ∼ 2 MWm -3 volume averaged, on the JIPP T-IIU device(R = 0.91 m/a = 0.23 m). High electron and ion temperatures (T e ∼ 2.5 keV, T i ∼ 2.0 keV, at each maximum) have been achieved by the operation at a plasma current I P of 280 kA, plasma line-averaged electron density n-bar e of 7 x 10 13 cm -3 and input power of 2 MW, with a suppression of total radiation loss (30 to 40 % of the total input power) by a carbon coating on the vacuum vessel. The fraction of ICRF power absorbed by the plasma, α, is determined experimentally from the decay of the stored plasma energy just after the ICRF pulse is terminated. The value of α increases slightly with increasing electron density and decreases from 90 to 70 % as the ICRF power is increased from 1 MWm -3 to 2 MWm -3 volume averaged. The global energy confinement time τ E , defined by W P /(P OH + αP rf ), decreases by a factor of 2 ∼ 3 from that in ohmic plasmas as the heating power increases up to 2 MW. It is found that the energy confinement time has a strong line-averaged electron density dependence as τ E ∝n-bar e 0.6 , which is obtained by the use of the measured absorbed power, while the Kaye-Goldston scaling predicts τ E ∝n-bar e 0.26 . (author)

  7. Feedback control of plasma equilibrium with control system aided by personal computer on the JIPP T-IIU tokamak

    International Nuclear Information System (INIS)

    Tsuzuki, T.; Toi, K.; Matsuura, K.

    1991-04-01

    A feedback control system aided by a personal computer is developed to maintain plasma position on the required position in the JIPP T-IIU tokamak. The personal computer enables to adjust various control parameters easily. In this control system, a control demand for driving the power supply of feedback controlled vertical field coils is composed to be proportional to a total plasma current. This system has been successfully employed throughout the discharge where the plasma current substantially changes from zero to hundreds of kiloamperes, because the feedback control can be done, being independent of the plasma current. The analysis of this feedback control system taken into account of digital sampling agrees well with the experimental results. (author)

  8. Zeff measurements and low-Z impurity transport for NBI and ICRF heated plasma in JIPP T-IIU tokamak

    International Nuclear Information System (INIS)

    Ida, K.; Amano, T.; Kawahata, K.; Kaneko, O.

    1988-12-01

    A visible bremsstrahlung detector array system for Z eff measurements and a charge exchange recombination spectroscopy (CXRS) system for fully ionized impurity profile measurements were installed on JIPP TII-U to study impurity transport for NBI and ICRF heated plasma. More impurities are sputtered by ICRF heating than by NBI and/or ohmic heatings. The carbon contribution to Z eff is 80-90 % for NBI heated plasmas, and 60 % for NBI + ICRF heated plasmas. With a carbon coating of vacuum vessel, the Z eff value decreases 2.4 to 1.7 and the carbon contribution to Z eff increases up to 80-90 %. We obtain the diffusion coefficient D a = 1.0 m 2 /s and the convective velocity V a (a) = 13 m/s at the plasma edge for carbon impurity from the radial profile and time evolution of fully ionized carbon after the ICRF pulse is turned on. (author)

  9. New features of L-H transition in limiter H-modes of JIPP T-IIU

    International Nuclear Information System (INIS)

    Toi, K.; Morita, S.; Kawahata, K.

    1992-09-01

    In limiter H-modes of JIPP T-IIU, a new type of L-H transition preceded by an ELM is observed. The preceding ELM (pre-ELM) appears just prior to the L-H transition. This type of transition is usually observed in H-modes of JIPP T-IIU. The L-H transition without the pre-ELM is triggered only in the case when a sufficiently large rapid current ramp down is emploied. In H-modes with constant q(a)∼3.5-4.5, coherent magnetic oscillations with m=3/n=1 destabilized during L-phase are further enhanced at the pre-ELM, and suppressed suddenly at the transition. This mode is situated in the region of the transport barrier. Propagation frequency of the m=3/n=1 mode, which may be affected by plasma mass rotation, rises appreciably (by ∼ 10 %) during H-phase with frequent ELMs, but remains unchanged for at least 200 μs after the transition. Behaviours of the m=3/n=1 and m=2/n=1 modes are well explained by quasi-linear resistive tearing mode analysis for modelled toroidal current density profiles slightly detached from the limiter. These experimental results suggest that the transition is controlled by the change of a magnetic field structure relating to the modification of a toroidal current density profile near the edge. The possibility for the development of edge radial electric field as a consequence of the transition is discussed. (author)

  10. Produção de membranas híbridas zirconizadas de SPEEK/Copolissilsesquioxano para aplicação em células a combustível do tipo PEM

    Directory of Open Access Journals (Sweden)

    Kelen R. Aguiar

    2012-01-01

    Full Text Available Membranas baseadas em poli(aril éter cetona sulfonada mostraram ser bastante promissoras para aplicação em células a combustível com membrana trocadora de prótons (PEMFC. O poli(éter-éter-cetona sulfonado (SPEEK, com elevado grau de sulfonação (GS, apresenta alta condutividade de prótons, mas sofre perda de funcionalidade e condutividade em temperaturas altas e umidades baixas. O desenvolvimento de membranas híbridas é uma das possibilidades para melhorar o desempenho destes materiais. Neste trabalho foram preparadas membranas híbridas zirconizadas de SPEEK/copolissilsesquioxano fosfonado (CF por casting, a partir de SPEEK com GS entre 60% e 70% e soluções de cloreto de zirconila (ZrOCl2 1, 5, ou 10% (m/m. As membranas foram caracterizadas por espectroscopia na região do infravermelho (FTIR, difratometria de raios-X (DRX, análise termogravimétrica (TG, calorimetria exploratória diferencial (DSC, condutividade de prótons (σ e microscopia eletrônica de varredura (MEV. A análise por energia dispersiva (EDS confirmou a presença de Zr em domínios esféricos dispersos homogeneamente pelas membranas, enquanto análises de DRX mostraram que os produtos da zirconização são amorfos. Ensaios de impedância eletroquímica indicam aumento da condutividade protônica com a adição de CF e 1 ou 5% de ZrOCl2.

  11. 1 küsimus noorele juhile : Milline peaks olema see firma, kus tahad viie aasta pärast töötada? / Kristi Loikmaa, Siim Saare, Tiiu Roosma ... [jt.

    Index Scriptorium Estoniae

    2009-01-01

    Küsimusele vastavad Ekspress Hotline'i turundujuht Kristi Loikmaa, SEBi organisatsiooni arendusjuht Siim Saare, BonBon Lingerie disainer ja osanik Tiiu Roosma, Advisio asutaja ja juht Lauri Antalainen, Brenstoli müügijuht Maret Puskar ning Carrot Konverentside partner Ott Sarapuu

  12. Interaction of an ice pellet and a toroidal plasma in the JIPP T-IIU tokamak with the injection-angle controllable system

    International Nuclear Information System (INIS)

    Sato, K.N.; Sakakita, H.; Liang, R.; Hamada, Y.; Ida, K.; Kano, Y.; Sakamoto, M.

    1994-01-01

    The interaction of an ice pellet and a toroidal plasma has been studied in the JIPP T-IIU tokamak by using an injection-angle controllable system. In order to carry out various basic experiments by varying the pellet deposition profile within a plasma, anew technique for an ice pellet injection system with controllability of the injection angle has been developed and installed with the JIPP t-IIU tokamak. Injection angle can be varied easily and successfully during an interval of two plasma shots in the course of an experiment. The injection angle has been varied poloidally from 6 to 6 degree by changing the angle of the last stage drift tube, and this makes possible for pellets to aim at from about r = -2 a/3 to r = 2 a/3 of the plasma. From two dimensional observations by CCD cameras, details of the pellet ablation structures with various injections angles have been studied, and a couple of interesting phenomena have been found. In the case of an injection angle (θ) larger than a certain value (θ ≥ 4 0 ), a pellet penetrates straightly through the plasma with a trace of straight ablation cloud, which has been expected from usual theoretical consideration. On the other hand, a long helical tail of ablation light has been observed in the case of the angle smaller than the certain value (θ ≤ 4 0 ). The direction of helical rotation (tail) is independent to that of the total magnetic field lines of the torus. In order to examine the tail direction, further experiments have been carried out as to four conditions of the combination with two (clockwise and counter-clockwise) toroidal field directions and with two plasma current directions. The results show that it seems to rotate to the electron diamagnetic direction poloidally, and to the opposite to the plasma current direction toroidally. Consideration on various cross sections including charge exchange, ionization and elastic collisions leads us to the conclusion that the tail-shaped phenomena may come from

  13. High speed graphic program on a personal computer and its utilization in JIPP T-IIU online data-processing system

    International Nuclear Information System (INIS)

    Taniguchi, Yoshiyuki; Noda, Nobuaki; Sasao, Mamiko; Sato, Masahiro

    1986-01-01

    A high speed graphic program was developed on a personal computer PC9801. Using this program, one can draw a waveform of successive 16 bit-integer data, such as obtained by analog-to-digital convertor. The program is written by the machine language and has a form of a subroutine program which can be called from main programs under N 88 BASIC. The time for drawing one waveform is 4 ms, which is two orders faster than the time with standard graphic routines of BASIC interpreter. This program is very convenient for the real-time display of plasma-monitoring raw data, such as plasma current, loop voltage, rf power etc. in tokamak experiments. This program has been utilized in JIPP T-IIU experiments and enables to display data of 8 channel ADC within a few seconds before the system transmits the data from CAMAC to the computer center of the institute. The program and its utilization are presented. (author)

  14. Taaskasutusest armastusega / Tiiu Suvi

    Index Scriptorium Estoniae

    Suvi, Tiiu

    2006-01-01

    Tuuliki Peili loomingulistest rõivastest, mis kannavad silti "Humana Disain" ning on valmistatud peamiselt second-hand materjalist ja Tallinna Taaskasutuskeskuse tekstiilikojast ning selle meistri Pille Kelleri tegemistest

  15. Publikuarmastus hotellitubades / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2011-01-01

    NU Performance Festival IV: Külalislahkusest / On Hospitality Tallinnas Viru hotellis 7.-10.11. 2011, kuraatorid Silke Bake ja Peter Stamer (Saksamaa). Heine Røsdal Avdali ja Yukiko Shinozaki lavastusest "Field Works - hotel". Kümne riigi kunstniku etendatavast performance'ist "The Love Piece"

  16. Plaadid / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2006-01-01

    Uutest heliplaatidest Arctic Monkeys "Whatever People Say I Am", Dreamphish "Happiness Happens", Viktoria Tolstoy "My Sweadish Heart", Ursula Rucker "Ma'at Mama", Sissel "Into Paradise", Blacky "See on me meeltele", "Alternating Current 2"

  17. Plaadid / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2007-01-01

    Uutest heliplaatidest The Shins "Wincing The Night Away", A Am Kloot "BBC Radio 1Peel Sessions", Tim Finn "Imaginary Kingdom", Kling Klang "The Esthetik of destruction", "25 Avenue le bar plaza Athenee Paris", Paul Weller "Hit Parade"

  18. Mihkel Kangur / Tiiu Koff

    Index Scriptorium Estoniae

    Koff, Tiiu, 1955-

    2005-01-01

    14. juunil 2005. a. kaitses Mihkel Kangur Tallinna Ülikoolis väitekirja teemal "Häiringute ja taimkatte mosaiiksuse kajastumine järvesetete õietolmu ja söeosakeste profiilidel" ("Disturbances and vegetation patchiness reflected in pollen and charcoal profiles from lacustrine sediments")

  19. Plaadid / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2008-01-01

    Uutest heliplaatidest Lightspeed Champion "Falling Off The Lavender Bridge", Sebastian Bach "Angel Down", Juanes "La Vida...", raadi Maria "Siin Tallinn", Erich Krieger "Live", Rock Hotel "Rock Hotel Rock Cafes"

  20. Jaanus Terasmaa / Tiiu Koff

    Index Scriptorium Estoniae

    Koff, Tiiu, 1955-

    2005-01-01

    14. juunil 2005. a. kaitses Jaanus Terasmaa Tallinna Ülikoolis väitekirja teemal "Seston fluxes and sedimentation dynamics in small Estonian lakes" ("Sestonivood ja settimise dünaamika Eesti väikejärvedes")

  1. Maailma ristteedel / Tiiu Reimo

    Index Scriptorium Estoniae

    Reimo, Tiiu, 1953-

    2010-01-01

    Infoteaduse ja raamatukogunduse alastest õppeprogrammidest. Raamatuajalugu on kujunenud interdistsiplinaarseks uurimisvaldkonnaks, iseseisva teadusdistsipliinina õpetatakse seda üha enam ka Põhjamaades, Baltimaades on raamatu ja raamatukogude ajalugu olnud raamatukogunduse õpetamise lahutamatu osa

  2. Plaadid / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2006-01-01

    Uutest plaatidest The Scaramangas "All Is Good Now", Jim Weider "Percolator", Think Of One "Tarfico", Primal Scream "Riot City Blues", Wochtzchee "Diktüoneemikalt", The Feeling "Tweöve Stops And Home", Sunblock "I'll Be Ready",

  3. Hea haridus alternatiivkoolist? / Tiiu Kuurme

    Index Scriptorium Estoniae

    Kuurme, Tiiu, 1953-

    2000-01-01

    Alternatiivkoolidest ja peamistest suundadest alternatiivpedagoogikas : avatud õpetus, Montessori-pedagoogika, Waldorf- ehk Steiner-pedagoogika, Freinet̀pedagoogika, vabad alternatiivkoolid, Jena-Plaan-pedagoogika, Landschulheim-tüüpi internaatkoolid, kool kui linn

  4. Akustika! Akustika! Akustika! / Tiiu Levald

    Index Scriptorium Estoniae

    Levald, Tiiu, 1940-

    2009-01-01

    Kahest kontserdist: 1. oktoobril rahvusooperis Estonia toimunud pidulikust galaõhtust, mis oli pühendatud Miliza Korjusele. 2. oktoobril Estonia kontserdisaalis Berliozi "Fausti needmine" ERSO, segakoor Latvia ja solistide ettekandes, dirigent Olari Elts

  5. Kevadel Alaska talves / Tiiu Ehrenpreis

    Index Scriptorium Estoniae

    Ehrenpreis, Tiiu

    2007-01-01

    Autori muljeid 22.-25. märtsini Fairbanksis toimunud Alaska Ülikooli ja Ülemaailmse Arktika Uurimise Keskuse (IARC) juhtimisel GLOBE'i programmi uue projekti "Aastaajad ja bioomid" koolitusseminarist

  6. Mõttekilde fantaasialennust suvelavadel / Tiiu Levald

    Index Scriptorium Estoniae

    Levald, Tiiu, 1940-

    2010-01-01

    Birgitta festivalil etendunud Glucki ooperist "Orpheus ja Eurydike", lavastaja Georg Rootering, R. Wagneri ooperist "Lohengrin", lavastaja Kaspar Holten ja G. Rossini ooperist "Sevilla habemeajaja", lavastaja Eliah Moshinsky

  7. Modified SPEEK membranes for direct ethanol fuel cell

    KAUST Repository

    Maab, Husnul; Nunes, Suzana Pereira

    2010-01-01

    /PI homogeneous blends. The membranes were characterized concerning their water and ethanol solution uptake, water and ethanol permeability in pervaporation experiments and their performance in DEFC tests. The ethanol permeabilities for the CMS-coated (180 nm

  8. Hispaanias auhinnati Eesti jalatsikunstnikke / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2006-01-01

    Eesti Kunstiakadeemia nahakunsti magistrandid Maris Pill ja Karen Milistver esinesid edukalt võistlusel "Lapiz de Oro 2006". Maris Pill võitis jalatsiprototüüpide kategoorias tööga "Two Faces" Kuldpliiatsi ja Karen Milistver tööga "Showy shoes" teise auhinna

  9. Tallinnas toimus 'Kunstisuve' esitlus / Tiiu Leis

    Index Scriptorium Estoniae

    Leis, Tiiu

    1998-01-01

    Pärnus, Kuressaares ja Haapsalus toimuva 'Kunstisuve' - Pärnu Linnagaleriis 'Midigrafik' (rahvusvaheline väikegraafika, koost. Sirje Eelmaa), Haapsalu Linnagaleriis 'Mix' (eesti maal, graafika, skulptuur, foto, installatsioon, koost. Agur Kruusing), Kuressaare Raegaleriis 'Nature' (traditsioonilisem eesti maal, graafika, skulptuur, koost. Rait Prääts), Kuressaare kultuurikeskuses 'Ilus lugu' (noorem ja mängulisem eesti kunst, koost. Karol Kallas) ئ esitlus toimus Tallinna heitveepuhastusjaama osoonimajas

  10. Külalised ja meie / Tiiu Levald

    Index Scriptorium Estoniae

    Levald, Tiiu, 1940-

    2009-01-01

    11. detsembril Estonia kontserdisaalis toimunud ERSO kontserdist, dir. Olari Elts ja solist soome metsosopran Monica Groop, kavas oli Wagneri ja Mendelssohni looming ning 12. detsembril Estonias toimunud Donizetti ooperi "Poliuto" kontsertettekandest, dirigent Arvo Volmer

  11. Evolutsioonilised kaalutlused ja filosoofia / Tiiu Hallap

    Index Scriptorium Estoniae

    Hallap, Tiiu

    1999-01-01

    Solipsistlikust ja mittesolipsistlikust reaktsioonist, bioloogilisest ja psühholoogilisest altruismist, evolutsiooniteooria sõltuvusest ühiskondlikest ideoloogiatest, Elliot Soberi evolutsioonilistest seletustest realistlikule maailmatunnetusele ja altruismile

  12. Hooneregister on elav organism / Tiiu Põld

    Index Scriptorium Estoniae

    Põld, Tiiu, 1945-

    1996-01-01

    Riikliku hooneregistri talituse juhataja Ülo Eesmets hooneregistri ajaloost, ülesannetest ja dokumentidest, mida on vaja hoone registreerimiseks, lisana tabel hooneregistrite aadresside ja telefonidega

  13. VAT teatril kaks uut noortelavastust / Tiiu Talvist

    Index Scriptorium Estoniae

    Talvist, Tiiu

    2010-01-01

    VAT teater panustab sel hooajal uutesse laste- ja noortelavastustesse: lisaks itaallaste Nino d’Introna ja Giacomo Ravicchio teksti põhjal valminud seiklusloole „Robinson & Crusoe” (lavastaja Aare Toikka), esietendub aprillis Mare Sabolotny noorte probleemidest kõnelev lavalugu „Kirjaklambritest vöö”. Lavastaja Rein Agur

  14. Plaadid / Veiko Pesur, Tiiu Laks, Mart Normet

    Index Scriptorium Estoniae

    Pesur, Veiko

    2008-01-01

    Uutest heliplaatidest Shower, Nice Try ja Jim Arrow & The Anachrones "Eesti Rock Antoloogia", Eskimo "Psst! pole sõnu sõnumiks tarvis", Tanel Padar & The Sun "Veidi valjem kui vaikus II", Liisi Koikson "Väikeste asjade võlu"

  15. Kvaliteetharidus riskilastele / Tiiu Tammemäe

    Index Scriptorium Estoniae

    Tammemäe, Tiiu

    2014-01-01

    17.-21. märtsini toimub Eestis rahvusvaheline konverents "Quality Education for Children at Social Risk. Sharing best practices and starting a dialogue", mida aitab organiseerida ka Tallinna ülikool

  16. Loomakasvatus, 2007 = Livestock farming, 2007 / Tiiu Tamm

    Index Scriptorium Estoniae

    Tamm, Tiiu

    2007-01-01

    2007. aastal tapeti ning müüdi tapaks 105 000 tonni loomi ja linde, toodeti 689 700 tonni piima ning 155,8 miljonit muna. Diagramm. Tabelid. Vt. samas: Loomade ja piima kokkuost, 2007 = Purchase of livestock and milk, 2007

  17. Plaadid / Kaur Garshnek, Maris Meiesaar, Tiiu Laks

    Index Scriptorium Estoniae

    Garšnek, Kaur, 1983-

    2008-01-01

    Uutest heliplaatidest Holst Singers ja Stephen Layton, Stephen "Rockferry", Queens Of Stone Age "Era Vulgaris Tour Edition", "Crystal Castles", Operator Please "Yes Yes Vindictive", Morcheeba "Dive Deep"

  18. Puksoo auhind 2007/2008 / Tiiu Reimo

    Index Scriptorium Estoniae

    Reimo, Tiiu, 1953-

    2009-01-01

    23. jaanuaril 2009 Tartu Ülikooli Raamatukogus peetud Friedrich Puksoo 119. sünniaastapäevale pühendatud ettekandepäeval "Raamatust, raamatukogust, raamatukoguhoidjast" kuulutati välja järjekordsed Puksoo auhinna laureaadid. TÜR-i ja ERÜ poolt välja antava auhinna pälvis TÜR-i teaduri, filosoofiadoktor Meelis Friedenthali dissertatsioon "Tallinna Linnaarhiivi Tractatus moralis de oculo", tõsteti esile Jürgen Beyeri ja Larissa Petina tööd

  19. Nele Suisalu otsib aktiivset vaatajat / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2008-01-01

    Lõuna-Prantsusmaal Montpellier's koreograaf Xavier le Roi juures õppiv Nele Suisalu lavastab koos elukaaslase Florent Hamoniga Tallinnas Kanuti Gildi saalis Augusti tantsufestivali raames tantsuetenduse "Ball"

  20. Academia Non Grata korraldas piketi / Tiiu Leis

    Index Scriptorium Estoniae

    Leis, Tiiu

    1998-01-01

    Kunstikooli Academia Non Grata korraldatud piketist 'Jõuluvale' Pärnu linnavalitsuse ees nõudmaks linnavalitsuse antava rahasumma suurendamist. Kommentaarid rektor Reiu Tüürilt, aselinnapealt Peeter Oravalt, linnapea Vello Järvesalult.

  1. Hetkebuklett kunstist Pärnus / Tiiu Leis

    Index Scriptorium Estoniae

    Leis, Tiiu

    1998-01-01

    Nelja maalikunstniku ئ Kostabi, Navitrolla, Van der Blut, Kaljo Simson ئ näitusest Caplini keskuses; Jelgava kunstnike (Lolita Zikmane, Kalvis Zuters, Edvin Kalnieks, Ieva Vitola) näitusest Linnagaleriis; näitus "Musik in der Kunzt" teatri palmisaalis, kus Urmas Uustal (1963), Elin Kard, Kristiina Väljamäe interpreteerivad muusikat installatsioonide, maalide ja söejooniste kaudu

  2. Ajakirjanike blogid ilmusid raamatutes / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2007-01-01

    Petrone, Epp. Minu Ameerika : reportaaže ja pihtimusi 2003-2006. 1. osa. Tartu : Petrone Print, 2007 ; Petrone, Epp, Reintam, Dagmar. Õun ära süüa? : [SL Õhtulehe populaarne suvejutt koos epiloogide ja lisadega. Tallinn] : Pegasus, 2007 ; Reintam, Dagmar. daki.elab.siin. Tartu : Petrone Print, 2007

  3. Tantsuline vaade kodusele Eestimaale Aafrikast / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2009-01-01

    9. dets. esietendub Tallinna Meistrite Hoovi teatrisaalis Eike Ülevainu, Jaak Sapase ning Eneli Meresmaa lavastus "Estonia Meets Africa ehk Vaade eemalt", mis kannab tinglikult dokumentaallavastuse nime ja esitatakse nüüdistantsu ja -teatri vormis

  4. "Suurel alternatsioonil" tehti inimkatseid / Tiiu Leis

    Index Scriptorium Estoniae

    Leis, Tiiu

    1999-01-01

    18. juunil alanud festivalil "Suur alternatsioon" esitati performance'eid, tehti spray-maalinguid, näidati videoprojektsioone, esinesid ansamblid Kurjam, Sahfan Sih ja Crying Harmony, jõe peal mägisi klavessiini Sorge ja Katrin Kosenkranius, luuletusi lugesid Veiko Märka ja Aapo Ilves; korraldaja Taje Tross

  5. Tampere Teatrisuve maiuspalaks olid soomlased / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2006-01-01

    38. Tampere teatrisuvest (Tamperen teatterikesä), vaatluse all on soomlaste menutükid - Anna Krogeruse "Armastusest minu vastu" (lav. Irene Aho, Soome Rahvusteater) ja William Shakespeare'i "Richard III" (lav. Juha Luukkonen, Vaasa Linnateater)

  6. Puuskulptuurid tagasi Pärnus / Tiiu Leis

    Index Scriptorium Estoniae

    Leis, Tiiu

    1998-01-01

    'Puu 98' raames Kõpu külas valminud 3 puuskulptuuri: Toomas Mitti (Tõstamaa kooli direktor) 'Ahel', Omar Tamme 'Pähklipureja' ja Pjotr Romanjuki 'Maailma neli vaadet' jõuavad Rocca al Marest tagasi Pärnusse, kus neid eksponeeritakse paar nädalat hotelli 'Victoria' ees ning antakse seejärel üle Pärnu maavalitsusele ja 'Puu 98' toetajatele

  7. Ooperimaailmast siit ja sealt / Tiiu Levald

    Index Scriptorium Estoniae

    Levald, Tiiu, 1940-

    2016-01-01

    Lavastustest „Reekviem… ja elu enne” ja „Jevgeni Onegin” (Brigitta festival), „Lendav Hollandlane” (RO Estonia), „Tsaari mõrsja” ja „Kahe pealinna duett” (Helikon-Ooper Estonias) ning „Madama Butterfly” (Läti RO)

  8. Maestro Roman Toi kodumaal / Tiiu Pikkur

    Index Scriptorium Estoniae

    Pikkur, Tiiu, 1947-

    2007-01-01

    Helilooja ja koorijuht Roman Toi osalemisest muuseumiõhtul "Kaunimad laulud pühendan Sul!" 21. mail Eesti Teatri- ja Muusikamuuseumis, helilooja 90. sünnipäevale pühendatud kontserdist 23. mail Tallinna Toomkirikus ja Roman Toi nimelisest kirikulaulude konkursist

  9. Linnateatri suveetenduse lavastab prantslane / Tiiu Talvist

    Index Scriptorium Estoniae

    Talvist, Tiiu

    2002-01-01

    Kuressaare Linnateatri suvelavastus "Arlekiini elu ja surm" on kokku pandud commedia dell' arte originaalstsenaariumide põhjal ja seda hakkab lavastama P. Pezin, kes on asjatundja commedia dell' arte ja maskiteatri alal

  10. Kuninglikud lapsed keset Mallorcat / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2007-01-01

    Kunstnike Yannick (s. 1942) ja Ben (s. 1930) Jakoberi eramuuseumist Hispaanias. Lisaks 16.-19. saj. pärit lasteportreedele sisaldab muuseum moodsa kunsti töid, sealhulgas kunstnike endi tehtud skulptuure ning Domenico Gnolli teoseid. Kodumaja kujundajaks on egiptuse arhitekt Hassan Fathy

  11. Olen tänulik / Tiiu Lember

    Index Scriptorium Estoniae

    Lember, Tiiu

    2003-01-01

    Artikli autor läbis Tartu Ülikooli avatud ülikooli täienduskoolituses programmi "Koolifüüsika ja loodusteaduslik mõtteviis". Loenguid pidasid Tartu Ülikooli õppejõud H. Voolaid - mehaanika ja optika, K. Tarkpea - elekter ja magnetism, aine ehitus, arutles füüsika ja looduse teemadel, ning J. Susi - molekulaarfüüsika teemad

  12. Suur 'Alternatsioon 98' / Tiiu Leis, Al Paldrok

    Index Scriptorium Estoniae

    Leis, Tiiu

    1998-01-01

    Kaheosalise Pärnu kultuuriürituse 'Alternatsioon 98' tutvustus: 8.-9. mail kujutav-, video- ja tegevuskunst; 5.-6. juunil muusika, tants, sport, mood. 8. mai: punkansambli 'Kurjam' kontsert, avatakse näitused 'Alternatsioon 2' Soolalaos, Tallinnas keelatud 'Eesti Vabariik 80' ja Taave Tuutma 'Rikaste toetamise fond', performance'id Rüütli tänaval; 9. mai: seksuaalvähemuste ja teiste protestimarss.

  13. Džässist Tallinnas 1918-1945 / Tiiu Lauk

    Index Scriptorium Estoniae

    Lauk, Tiiu

    2011-01-01

    Esimestest džässi mängimise katsetustest. Tallinna kohvikute ja restoranide džässiorkestritest. Tähtsamatest Tallinnas tegutsenud poolelukutselistest juhumänguorkestritest. Orkestrite stiilist, koosseisudest ja repertuaarist. Džässist kontserdilaval. Priit Veebelist, Hans Speegist ja Kuldsest Seitsmest kontserdilaval. Hans Speegi Plaza-kontsertidest

  14. Haridustee = Education / Tiiu-Liisa Rummo-Laes

    Index Scriptorium Estoniae

    Rummo-Laes, Tiiu-Liisa

    2006-01-01

    Põhihariduses soolist eristumist ei ole märgata, murettekitavalt suur on poiste väljalangemine enne põhihariduse omandamist. Tütarlapsed ja noormehed üld- ja kutsehariduses, kesk- ja kõrghariduses. Noorte õppimine ja töötamine leibkonnatüübiti. Tabel, graafik, diagrammid

  15. Plaadid / Rein Vader, Heidi Purga, Tiiu Laks...[jt.

    Index Scriptorium Estoniae

    2008-01-01

    Uutest heliplaatidest Nick Cave & The Bad Seeds "Dig, Lazarus, Dig!", Erykah Badu "New Amerikah Part One", Leslie da Bass "Nights By Open Windows", Jack Johnson "Sleep Througth The Static", Janet Jackson "Discipline", "Rock & Roll City"

  16. VAT-teater vaatab 30 aastat tulevikku / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2010-01-01

    VAT Teater toob S. Becketti "Krappi viimase lindi" lavale ebatavalisel moel. Festivalil "Draama 2010" Tartus toimub 8. septembril esimene avalik lindistus "...viimane lint / Saare esimene lint". Kontseptsioon: Tanel Saar ja Co. Esitus: Tanel Saar ja Hanna Allsaar. Näitejuhid-konsultandid: Rait Avestik ja Aare Toikka. "Krappi viimane lint" esietendub VAT Teatri ja Tanel Saare esituses 2040. a. sügisel. Festivali "Draama 2010" kavast

  17. Baltoscandal näitas Euroopa absurdi / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2010-01-01

    Rakveres 10. juulil lõppenud 11. rahvusvahelisest teatrifestivalist Baltoscandal. Prantslase Gerald Kurdiani kontsertetendusest "This is the Hello Monster!". Riina Maidre ja Maike Londi kontsertetendusest "PostUganda". Philippe Quesne'i ja tema trupi Vivarium Studio lavastusest "Big Bang". Taani tantsija Mette Ingvartseni lavastusest "Giant City". Akhe inseneriteatri lavastusest "Faust. 2360 sõna". Hollandi trupi Dood Paard lavastusest "Answer Me"

  18. Joonas Hellerma otsib teed vastuste juurde / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu

    2006-01-01

    Vestlusest 21-aastase Joonas Hellermaga, kes on lõpetanud Tallinna Ülikooli filmi ja video eriala ja on 2006. aastast Eesti Humanitaarinstituudi filosoofia magistrant, toimetab ETV kultuurisaadet "OP!", on kirjutanud kultuurilehes Sirp ja koolipõlves töötanud ka raadios

  19. Enneolematud ja pärasttulematud indiviidid / Tiiu Leis

    Index Scriptorium Estoniae

    Leis, Tiiu

    1998-01-01

    Chaplini kunstikeskuses ja Pärnu mudaravilas avatud autopotreede näitusest 'Ma tunnen end paremini', lähemalt Ene-Liis Semperi videointallatsioonist 'Edasi-tagasi', John Coplansi, Pedro da Cruzi ja Kärt Putki töödest

  20. Raagi Hamleti-filmil topelt-esilinastus / Tiiu Talvist

    Index Scriptorium Estoniae

    Talvist, Tiiu

    2000-01-01

    29.oktoobril esilinastub Saaremaal kinos "Scala" ja Eesti Televisioonis Hamleti-teemaline ingliskeelne lühimängufilm "Miski on mäda ehk Kogu vale Hamletist" : režissöör, stsenarist ja produtsent Ilmar Raag : OÜ Kinomees 2000

  1. IPO. Mäng suure orkestriga / Tiiu Pedaja, Gerd Laub

    Index Scriptorium Estoniae

    Pedaja, Tiiu

    2006-01-01

    Aktsiate avaliku pakkumise ehk IPO korraldamisest. Lisad: Millal on õige aeg?; Milline ettevõte sobib avalikuks pakkumiseks?; Milline avalik pakkumine on edukas?; Kuidas IPO-l aktsiaid jaotatakse? Skeemid: Aktsia hinna kujunemine avaliku pakkumise käigus; Järelturu aktsiahinda mõjutavad tegurid

  2. Inimhääle lummus ja topeltverism / Tiiu Levald

    Index Scriptorium Estoniae

    Levald, Tiiu, 1940-

    2008-01-01

    Birgitta festivali raames 10. ja 11. VIII Pirita kloostris toimunud etendustest - Mascagni "Talupoja au", Leoncavallo "Pajatsid" ja Donizetti "Maria Stuart" Moskva Novaja Opera esituses, dirigendid: Eri Klas, Valeri Kritskov ja Sergei Lõssenko

  3. Plaadid / Liina Valdre, Erik Aru, Tiiu Laks...[jt.

    Index Scriptorium Estoniae

    2007-01-01

    Uutest heliplaatidest Dylan Donkin "Food For Thoughtlessness", Kreatiivmootor "Irratsionaalne", Coco Electrik "Army Behind The Sun", Marc Collin featuring Katrine Ottosen & Valente "Two For The Road", Korn "Untitled"

  4. Kaks vaadet narkoelule ja tõlkimisele / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2010-01-01

    Arvustus: Thompson, Hunter Stockton. Hirm ja jälestus Las Vegases : metsik rännak Ameerika unelma südamesse / inglise keelest tõlkinud [ja järelsõna autor] Mihkel Kaevats. [Tallinn] : Eesti Päevaleht, 2010 ; Welsh, Irvine. Trainspotting : romaan / tõlkinud Olavi Teppan. Tallinn : Koolibri, 2010

  5. "Vasha" on mitme lõpuga film / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2009-01-01

    Hannu Saloneni uuest mängufilmist "Vasha" (endine tööpealkiri "Kid ja Killer"), Eesti, Soome, Saksa ja Iiri koostööfilmist, kus kesksetes osades on türklane Mehmet Kurtulus, eestlastest Mart Müürisepp, Rein Oja, Jan Uuspõld jt

  6. Pean saama Eurovisioonile, muidu suren 2010 / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2010-01-01

    12. märtsil Nokia kontserdimajas toimunud konkursi Eesti laul 2010 finaalkontserdist, saatejuhtidest Ott Sepast ja Märt Avandist, Madis Aesma loodud Pean saama Eurovisioonile, muidu suren 2010 lugudest. Robin Juhkentali võidulaulust

  7. Mineviku esitamine kui osa ajaloo loomisprotsessist / Tiiu Jaago

    Index Scriptorium Estoniae

    Jaago, Tiiu, 1960-

    2011-01-01

    Tutvustus: Heimo, Anne. Kapina Sammatissa : vuoden 1918 paikalliset tulkinnat osana historian yhteiskunnallisen rakentamisen prosessia. Helsinki : Suomalaisen Kirjallisuuden Seura, 2010 (dissertatsioon)

  8. Kivirähk korraga kahel laval / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2009-01-01

    31. jaan. Ugalas esietenduvast Andrus Kivirähki esimesest näidendist "Vanamehed seitsmendalt" Peeter Tammearu lavastuses ja VAT Teatris lavale jõudvast Kivirähki uusimast tükist "Ingel, ingel, vii mind taeva" Aare Toikka lavastuses

  9. Elu raamatute keskel : Kyra Roberti tegemisi meenutamas / Tiiu Reimo

    Index Scriptorium Estoniae

    Reimo, Tiiu, 1953-

    2011-01-01

    25. juulil 2011 möödus 95 aastat Kyra Roberti sünnist. Aprilli alguses Tallinna Ülikooli Akadeemilises Raamatukogus toimunud aastapäevakonverentsil meenutati selle maja kauaaegset töötajat ning avati mälestusnäitus

  10. Katk Põhjasõja ajal Eestis / Tiiu Oja

    Index Scriptorium Estoniae

    Oja, Tiiu

    1996-01-01

    Tabelid: Katku surnud ja ellujäänuteprotsent elanikkonnast kihelkondade järgi Eestimaal 1712. a. revisjoni alusel; Eestimaa mõisad, kus suremus oli väga kõrge; Saaremaal katku järel tühjaks jäänud mõisad; Ellujäänud tööjõuliste inimeste, vanade ja laste suhtarv 1712. a. revisjoni järgi; Katku surnute arv Liivimaal 1711-1712 a. loenduse andmeil

  11. Plaadid / Mari Rebane, Heidi Purga, Tiiu Laks...[jt.

    Index Scriptorium Estoniae

    2008-01-01

    Uutest heliplaatidest Sigur Ros "Heim/Hvart", Jay-Z "American Gangster", Bob Marley and The Wailers "Roots, Rock, Remixed", Ghostface killah "The Big doe Rehab", Backstreet Boys "Unbreakable", Matchbox Twenty "Exile on Mainstream", "Just" Hits 6"

  12. Laboratooriumi tänavalt, armastusega / Tiiu Suvi

    Index Scriptorium Estoniae

    Suvi, Tiiu

    2007-01-01

    Laboratooriumi tänava Ukraina Kreeka-Katoliku kiriku Tallinna koguduse Kolmkäsi Jumalaema kirikust. Sisekujundajaks ning koguduse vanemaks on ERKI mööbli- ja sisekujundajana lõpetanud Anatoli Ljutjuk. Kiriku taastamisest, laupäevastest käsitöötundidest lastele, kloostrikunstide kooli Labora ja poegade Bogdani ja Nestori tegevusest

  13. Oodatav tsensuuri moment on osa kunstilisest teostusest / Tiiu Leis

    Index Scriptorium Estoniae

    Leis, Tiiu

    1998-01-01

    Viljandis toimunud kunstipäevade "Kiriküüt" raames Pärnu-Ikla-Tartu-Tallinna maanteel valminud "Maantee näituse", kus pärnakaist esinevad Andrus Joonas, Sütevaka Andres, Taave Tuutmaa, Kadri Alesmaa, filmile (teost. Jasper Zoova) jäädvustamiseks korraldatud bussireisist ja intsidendist graffiti'ga kaetud bussi pärast.

  14. Kõik on kunst, kunst on kõikjal / Tiiu Leis

    Index Scriptorium Estoniae

    Leis, Tiiu

    1998-01-01

    25. juulil toimus Pärnus raehoovis kehamaalimise üritus, mille kuraatoriks Ene-Liis Semper, kunstnikud Marko Laimre, Kiwa, Jasper Zoova, Tarrvi Laamann ning mis toimus Barclay sigarettide reklaamikampaania 'Art is Everywhwere' (eestipoolne korraldaja Per Li ehk Pear Väli) raames.

  15. Pärimuslik ajalugu ja Fr. R. Kreutzwald / Tiiu Jaago

    Index Scriptorium Estoniae

    Jaago, Tiiu, 1960-

    2005-01-01

    Pärimuslik ajalugu kui rahvapärane ajalookäsitus, mida saab uurida folkloorse jutustamise kaudu. Fr. R. Kreutzwaldi ja F. K. H. Kruse sõnavõttudest Aruküla koobaste päritolu kohta ajakirjas "Das Inland" aastast 1844

  16. Kolm võimalust, kolm kontrasti / Tiiu Levald

    Index Scriptorium Estoniae

    Levald, Tiiu, 1940-

    2009-01-01

    Saaremaa ooperipäevadel Soome Kammerooperi ja Läti Rahvusooperi poolt esitatud kolmest ooperist - Ilkka Kuusisto "Vabaduse vang - Ryti, Risto, nr 236/46", R. Wagneri "Lendav Hollandlane" ja C. Puccini "Turandot"

  17. Rahvusteema nüüdistantsu laval / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2009-01-01

    5. nov. Kanuti Gildi saalis esietenduvast tantsulavastusest "Tavaj", mille autoriteks ja esitajateks on Alissa Šnaider, Päär Pärenson ja Renzo van Steenbergen. Lavastus uurib eesti- ja venekeelsete elanike suhtlemist Eestis

  18. Euroopa Liidu lävel / Tiiu Sizova

    Index Scriptorium Estoniae

    Sizova, Tiiu

    2003-01-01

    Ilmunud ka: Severnoje Poberezhje : Okruzhajushtshaja Sreda 6. dets. lk. 1. Eesti keskkonnahoiu seisukohalt on Ida-Virumaa üks problemaatilisemaid piirkondi, ülesanded seoses rahvusvaheliste direktiivide täitmisega

  19. Lavaka lõpetajate pink on pikk / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2009-01-01

    Kevadel lavakunstikooli lõpetavate tudengite lavastusest "Pikk pink" , mis koosneb kuuest lühiloost - Mait Jooritsa "Kantani padi", Kristjan Üksküla "Jääger" ja "Albioni tütar", Roland Laosi "Genees ja katastroof", Hendrik Toompere jun. jun. "Karupoeg Puhh" ja Kerttu Moppeli " Leib!". Etendused toimuvad Hobuveskis

  20. Kümme teatristarti alustas suureks kasvamisega / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu,1984-

    2010-01-01

    Tallinna Linnateater annab kümnele algajale võimaluse lavastada professionaalses teatris. 6. oktoobril esietendunud monotükist "Suur mees juba", millega jõudis lavale kolm professionaalset debüüti korraga - Kaarel B. Väljamäe esimene teatritekst, Diana Leesalu esimene lavastus ning Priit Piusi esimene suur roll

  1. Kuulsused võitlevad õiglase kaubanduse eest / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2006-01-01

    Arenenud riigid ekspordivad oma põllumajandusülejääke arengumaadesse, müües neid seal odavama hinnaga kui kohalikud põllumehed oma toodangut, nii jäävad kohalikud farmerid rahata. Mitmed maailmakuulsad näitlejad ja lauljad osalevad õiglase kaubanduse liikumises. Lisa: Make Trade Fair üritab ohjeldada heaoluriike

  2. Uue ajastu uus põlvkond / Tiiu Levald

    Index Scriptorium Estoniae

    Levald, Tiiu, 1940-

    2008-01-01

    Vaatluse alla on võetud viimase kümne aasta jooksul peale kasvanud noorte lauljate tegemised Estonias, Vanemuises, Nargen Operas ja erinevates projektides. Pikemal kahest lavastusest Estonias - Rossini "Tuhkatriinu" ja Tambergi "Cyrano de Bergerac". Artikli lõpus loetelu lauljatest ja nende rollidest erinevates teatrites ja projektides

  3. Mikk Mikiveri mälestuseks / Tiiu Pikkur

    Index Scriptorium Estoniae

    Pikkur, Tiiu, 1947-

    2006-01-01

    4. sept. esitleti Draamateatris Mikk Mikiveri mälestusele pühendatud plaati "In memoriam", kus ema Teresa, helilooja Kaljo Raidi ja piibliõpetaja ning jutlustaja Philipp-Teedy Tüüri mõtteid loeb Tõnu Mikiver. Plaadil kõlab muusika kitarrist Heiki Mätliku esituses. Plaadi tekstid valis kirjastusselts Logos

  4. Ooperipäevad Saaremaal (II) / Tiiu Levald

    Index Scriptorium Estoniae

    Levald, Tiiu, 1940-

    2008-01-01

    21.-27. VII Saaremaa ooperipäevade raames toimunud üritustest - Carmen Tabori lavastatud Aino Kallase ja Tauno Pylkkäneni "Patseba Saaremaal" (esimene osa draama- ja teine ooperilavastus), Gershwini ooperist "Porgy ja Bess" ning 25. VII toimunud galakontserdist

  5. Hämmingut, striptiisi ja naeru Baltoscandalilt / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2010-01-01

    Itaalia eksperimentaalse teatri lavastaja Romeo Castellucci lavastusest "Hey Girl" ning briti näitleja Ursula Martinezi lavastusest "My Stories Your E-mails" Rakveres 7.-10. juulini toimunud teatrifestivalil Baltiscandal

  6. Täiend(us)koolituse kitsaskohtadest / Tiiu Hazak

    Index Scriptorium Estoniae

    Hazak, Tiiu

    2002-01-01

    Ilmunud ka: ; Buhgalterskije Novosti nr. 4, lk. 10-12. Probleemidest täiendkoolituses - vastuolu haridusseaduse ja tulumaksuseaduse vahel ning täienduskoolituse muutumine kaubaks, mistõttu pakutavad õppekavad ei pruugi vastata inimeste tegelikele vajadustele

  7. Polyvinyl alcohol (PVA) and sulfonated polyetheretherketone (SPEEK) anion exchange membrane for fuel cell

    CSIR Research Space (South Africa)

    Luo, H

    2010-08-31

    Full Text Available less than proton exchange membrane systems using alcohol as fuel. Many anion exchange membranes based on quaternised polymers have been developed and studied for AMFC3-5. The quaternary ammonium functional groups are the anion conductors...

  8. Photogeneration of H2O2 in SPEEK/PVA aqueous polymer solutions.

    Science.gov (United States)

    Little, Brian K; Lockhart, PaviElle; Slaten, B L; Mills, G

    2013-05-23

    Photolysis of air-saturated aqueous solutions containing sulphonated poly(ether etherketone) and poly(vinyl alcohol) results in the generation of hydrogen peroxide. Consumption of oxygen and H2O2 formation are initially concurrent processes with a quantum yield of peroxide generation of 0.02 in stirred or unstirred solutions within the range of 7 ≤ pH ≤ 9. The results are rationalized in terms of O2 reduction by photogenerated α-hydroxy radicals of the polymeric ketone in competition with radical-radical processes that consume the macromolecular reducing agents. Generation of H2O2 is controlled by the photochemical transformation that produces the polymer radicals, which is most efficient in neutral and slightly alkaline solutions. Quenching of the excited state of the polyketone by both H3O(+) and OH(-) affect the yields of the reducing macromolecular radicals and of H2O2. Deprotonation of the α-hydroxy polymeric radicals at pH > 9 accelerate their decay and contribute to suppressing the peroxide yields in basic solutions. Maxima in [H2O2] are observed when illuminations are performed with static systems, where O2 reduction is faster than diffusion of oxygen into the solutions. Under such conditions H2O2 can compete with O2 for the reducing radicals resulting in a consumption of the peroxide.

  9. Photogeneration of H2O2 in Water-Swollen SPEEK/PVA Polymer Films.

    Science.gov (United States)

    Lockhart, PaviElle; Little, Brian K; Slaten, B L; Mills, G

    2016-06-09

    Efficient reduction of O2 took place via illumination with 350 nm photons of cross-linked films containing a blend of sulfonated poly(ether etherketone) and poly(vinyl alcohol) in contact with air-saturated aqueous solutions. Swelling of the solid macromolecular matrices in H2O enabled O2 diffusion into the films and also continuous extraction of the photogenerated H2O2, which was the basis for a method that allowed quantification of the product. Peroxide formed with similar efficiencies in films containing sulfonated polyketones prepared from different precursors and the initial photochemical process was found to be the rate-determining step. Generation of H2O2 was most proficient in the range of 4.9 ≤ pH ≤ 8 with a quantum yield of 0.2, which was 10 times higher than the efficiencies determined for solutions of the polymer blend. Increases in temperature as well as [O2] in solution were factors that enhanced the H2O2 generation. H2O2 quantum yields as high as 0.6 were achieved in H2O/CH3CN mixtures with low water concentrations, but peroxide no longer formed when film swelling was suppressed. A mechanism involving reduction of O2 by photogenerated α-hydroxy radicals from the polyketone in competition with second-order radical decay processes explains the kinetic features. Higher yields result from the films because cross-links present in them hinder diffusion of the radicals, limiting their decay and enhancing the oxygen reduction pathway.

  10. Characterization of polymer blends PES/SPSf and PES/SPEEK for direct methanol fuel cells

    NARCIS (Netherlands)

    Manea, G.C.; Mulder, M.H.V.

    2002-01-01

    Existing polymer electrolyte membranes (PEMs) applied for hydrogen fuel cells are frequently not suitable for direct methanol fuel cells due to the high methanol permeability. Therefore, new materials are required and in order to avoid laborious fuel cell experiments with a so-called

  11. Andres Noormets - olemuselt luuletaja, vormilt lavastaja / Andres Noormets ; intervjueerinud Tiiu Laks

    Index Scriptorium Estoniae

    Noormets, Andres, 1963-

    2010-01-01

    Andres Noormets endast, oma lavastustest, näitlemisest ja lavastamisest, elu mõttest, uue otsimisest oma teatritöödega, sellest, mis endiselt paelub teatris ja praegusi teatritegemisi enim mõjutab, ise kirjutamisest jm. Andres Noormetsa eluloolisi andmeid

  12. IPO majanduslanguse ajal? See on võimalik! / Tiiu Pedaja ; interv. Villu Zirnask

    Index Scriptorium Estoniae

    Pedaja, Tiiu

    2008-01-01

    Evli Securities ettevõtete rahanduse Eesti juht põhjendab, miks IPO-sid on võimalik korraldada ka majandusliku languse ajal, investorid võtavad hästi vastu infrastruktuuriettevõtteid. Lisa: Euroopas langes IPOde arv aastaga 49%

  13. Kormašov puhus Leonardo autoportree intriigi lõkkele / Tiiu Leis

    Index Scriptorium Estoniae

    Leis, Tiiu

    2010-01-01

    Kadrioru Kunstimuuseumis eksponeeritakse Leonardo da Vinci arvatavat autoportreed. Lõuna-Itaalia erakogust leitud maali uurimisprotsessi kaasati Tallinna Ülikooli kunstiosakonna juhataja, maali ja maalitehnoloogia õppejõud Orest Kormašov, kes jagab selgitusi maali uuringute kohta. Ekspertiisis osales ka Eesti Kunstiakadeemia graafilise disaini tudeng Helen Kokk

  14. Aineüleste pädevuste koolitus Pestalozzi programmi raames / Tiia Pukk, Tiiu Vaher

    Index Scriptorium Estoniae

    Pukk, Tiia

    2011-01-01

    1969 alguse saanud Pestalozzi koolitusprogramm on suunatud Euroopa kultuurikonventsiooniga ühinenud 49 riigi haridustöötajatele. Seekordne üritus toimus Tartus, koolituse teemaks aineülesed pädevused

  15. Ekspertiis päästis mehe mõrtsukatiitlist / Tiiu Põld

    Index Scriptorium Estoniae

    Põld, Tiiu, 1945-

    2007-01-01

    Kohtulahendist, kus maakohus saatis mehe eaka naise tapmise eest 12. aastaks vangi, aga ringkonnakohus vabastas ta paar kuud hiljem selgitades DNA-analüüsi abil, et ta on süütu. Lisatud: alusetu vangistus läheb kalliks

  16. Tallinna Jaani kogudus jagas oma esimesed tänuristid / Tiiu Pikkur

    Index Scriptorium Estoniae

    Pikkur, Tiiu, 1947-

    2008-01-01

    14. detsembril tähistas Tallinna Jaani kogudus oma 141. aastapäeva ja andis esmakordselt neljateistkümnele pikka aega kogudust teeninud ja kiriku suurremondiga enim seotud inimesele koguduse tänuristid

  17. Lepatriinu tuleb Tallinna lõhkuma / Gary Olson ; interv. Tiiu Laks

    Index Scriptorium Estoniae

    Olson, Gary

    2006-01-01

    Uutest heliplaatidest Deftones "Saturday Night Wrist", Robb Scott "Afro Adyssey", Zucchero "Fly", Agoria "The Green Armchair", "Back To The Bus ئ Babyshambes", Fratellis "Costello Music", Rod Stewart "Still The Same..."

  18. EU eastward enlargement and the Baltic Sea region role in trade integration / Tiiu Paas

    Index Scriptorium Estoniae

    Paas, Tiiu, 1949-

    2003-01-01

    Läänemeremaade osast Baltimaade integratsioonis rahvusvahelisse kaubandusse. El-is on kaubavoogude elastsus peaaegu kaks korda suurem kui riikidel väljaspool seda, kusjuures see kehtib võrdselt nii ekspordi kui impordi kohta. Tabelid

  19. Cool : karvased hipid ja sürrid hobusepead / Maris Meiesaar, Tiiu Laks

    Index Scriptorium Estoniae

    Meiessaar,Maris

    2008-01-01

    !". PÖFFi filme programmist "Crazy Cool: Põhja-Ameerika indie-filmid" - USA mängufilm "Humboldti maa" ("Humboldt Country"), režissöörid Darren Grodsky, Danny Jacobs, Kanada dokumentaalfantaasia "Minu Winnipeg" ("My Winnipeg"), režissöör Guy Maddin

  20. Fännid püstitasid Wallace'ile ja Gromitile kuju / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2006-01-01

    Kuna täispikk animafilm "Wallace ja Gromit : Libaküüliku needus" ("Wallace & Gromit : The Curse of the Were-Rabbit") võitis Oscari, otsustasid fännid filmi autori kodulinna Bristolisse kuju püstitada

  1. Koduseinale maal oma sõrmejäljest või DNA-st / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2006-01-01

    Disainerite duo DNA11 - Adrian Salamunovic ja Nazim Ahmed teevad soovijate DNA-st või sõrmejäljest kunstiteose. Näpujälg skaneeritakse arvutisse, DNA näidis viiakse laborisse, kus selle väljavõtet pildistatakse

  2. Arukad asjad võtavad maailmas võimu / Tiiu Leis

    Index Scriptorium Estoniae

    Leis, Tiiu

    2009-01-01

    Arukate toodete disainiprojektist. Näited tudengite töödest: vibreeriv padi, vaikne sein, soojendav vest, helineeldematerjalid, valgustundlik kardin, tattoo-printer, helendav sall, riknemist tuvastav pakend, digivanaema, perereliikvia Relic, maksevahend-käevõru Smart-pay

  3. Loomade ja piima kokkuost, 2008 = Purchase of livestock and milk, 2008 / Tiiu Tamm

    Index Scriptorium Estoniae

    Tamm, Tiiu

    2008-01-01

    2008. aastal saadi lihatöötlemisettevõtete kokkuostetud 40 000 veisest 9492 tonni liha ja 406 800 seast 32 074 tonni liha, piimatöötlemisettevõtted ostsid 2008. aastal 614 290 tonni piima. Graafik. Tabel

  4. Tähtpäevakalendri kujundamisest Nõukogude Eestis aastatel 1945-1985 / Tiiu Kreegipuu

    Index Scriptorium Estoniae

    Kreegipuu, Tiiu, 1977-

    2011-01-01

    Kalendritähtpäevade ajaloolisest taustast Eestis ja Nõukogude Liidus, sarnasustest ja erinevustest. Pühade ja tähtpäevade funktsioonidest Nõukogude kalendris. Nõukogude Eesti tähtpäevakalendri analüüs

  5. Õigeksmõistev otsus vallandas publiku tormilise aplausi / Tiiu Põld ; kommenteerinud David Vseviov ; Marju Lauristin

    Index Scriptorium Estoniae

    Põld, Tiiu, 1945-

    2009-01-01

    Harju maakohtu õigeksmõistvast otsusest aprillirahutuste korraldamises süüdistatavate Dmitri Linteri, Maksim Reva, Dimitri Klenski ja Mark Sirõki kohta. Kommenteerivad David Vseviov ja Marju Lauristin

  6. Change of Zonal Flow Spectra in the JIPP T-IIU Tokamak Plasmas

    International Nuclear Information System (INIS)

    Hamada, Y.; Watari, T.; Yamagishi, O.; Nishizawa, A.; Narihara, K.; Kawasumi, Y.; Ido, T.; Kojima, M.; Toi, K.

    2007-01-01

    When Ohmically heated low-density plasmas are additionally heated by higher-harmonics ion-cyclotron-range-of frequency heating, heated by neutral beam injection, or strongly gas puffed, the intensity of zonal flows in the geodesic acoustic mode frequency range in the tokamak core plasma decreases sharply and that of low-frequency zonal flow grows drastically. This is accompanied by a damping of the drift wave propagating in the electron diamagnetic drift direction, turbulence by trapped electron mode (TEM), and the increase of the mode propagating to ion diamagnetic drift direction (ITG). In the half-radius region, TEM and high-frequency zonal flows remain intense in both OH and heated phases. ITG and low-frequency zonal flows grow in heated plasmas, suggesting a strong coupling between ITG and low-frequency zonal flow

  7. Noor koreograaf Krõõt Juurak sai imel sabast kinni / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2006-01-01

    Tantsulavastusest "Once upon" Kanuti Gildi saalis. Esietendus 12. okt. Idee ja esitus Krõõt Juurak. Valminud prooviperioodide tulemusel Viinis, PAFis Prantsusmaal ja Tallinnas. Etendub 6. dets. ka Austrias Dietheater Küntslerhausis Viinis

  8. Measurement of radiation power from the JIPP T-IIU tokamak plasma

    International Nuclear Information System (INIS)

    Ogawa, Isamu.

    1987-04-01

    Characteristics of a pyroelectric detector, a metal-film bolometer and a thermistor are investigated in order to attain high reliability of the bolometric measurement. The spurious signal which appears on a pyroelectric detector is efficiently eliminated by setting a mask close to the detector, which has a function of avoiding the direct incidence of photons on its electrode. This is verified with the consistency of integrated value of the signal. The detector is calibrated with a HeNe laser taking the reflection on the detector surface into account. No temporal change has been seen on the sensitivity of the detector calibrated by this method. We also developed a thin metal-film bolometer with high sensitivity (12.9 Ω/mJ), high time response (3 μs) and well defined thermal characteristics. The calibration of this detector was performed by supplying a bias current through its resistor. We constructed a bolometric system with high time response and high spatial resolution, which consisted of twelve pyroelectric detectors and a metal-film bolometer. The radiation power measured with the pyroelectric detector agrees with that measured with the calibrated metal-film bolometer within 10 %. Spectroscopic and bolometric measurements with spatial and temporal resolution show that large radiation loss brings about the decrease in electron and ion temperatures and plasma energy. Carbon limiters have an effect to suppress the radiation power for ohmic plasma, but are insufficient for ICRF heated plasma. The main contribution to radiation power may be attributed to Fe impurity released from the ICRF antennae, the Faraday shield and vacuum vessel. By making carbonization of the wall and in-vessel components, the Fe impurity is suppressed to a low level (n Fe /n e ∼ 0.04 %) and the radiation power is reduced to P rad /(P OH + P rf ) ∼ 20 % and emissivity throughout the plasma region is reduced. (author)

  9. Augusti Tantsufestival lõppeb lõbusalt / Oleg Sulimenko ; intervjueerinud Tiiu Laks

    Index Scriptorium Estoniae

    Sulimenko, Oleg

    2010-01-01

    Vene koreograafide-tantsijate Oleg Sulimenko (elab Viinis) ja Andrei Andrianovi tantsulavastusest "Made in Russia", mis lõpetab 11. Augusti Tantsufestivali Tallinnas. Kuraator Priit Raud 14.-28. augustini kestva festivali kavast

  10. Alguses oli Arvo Pärdi muusika ja siis tulid Jalakas ja videokunstnikud / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2010-01-01

    Tõnu Kaljuste ja Peeter Jalaka lavastusest "Alguses oli", lavastuse aluseks Arvo Pärdi teosed "In Principio" ja "Miserere", 17. augustil Noblesse valukojas toimunud etendusest, muusikaline juht Tõnu Kaljuste

  11. Kutseharidus rahvusvahelises võrdluses = Vocational education in international comparison / Tiiu-Liisa Rummo

    Index Scriptorium Estoniae

    Rummo, Tiiu-Liisa

    2007-01-01

    Võrdluses teiste Euroopa Liidu liikmesriikidega iseloomustab Eestit madal osaluse määr kutsehariduses. EL-i 25 riigi poiste keskmine kutsekeskhariduses õppimise määr on 57%, Eestis 40%, tüdrukute osas on vastavad numbrid 54% ja 19%. Lisatud diagrammid

  12. Kutseõppeasutuste õpetajad = Pedagogues of vocational education institutions / Tiiu-Liisa Rummo

    Index Scriptorium Estoniae

    Rummo, Tiiu-Liisa

    2007-01-01

    Eesti lähituleviku eesmärgiks on motiveerida kutsehariduse pedagooge ja spetsialiste kutseharidussüsteemis töötama. Kutseõppeasutuste pedagoogid vanuserühma, soo, ametijärgu ja haridusastme järgi. Lisatud diagramm ja tabelid

  13. Kardetud ja kartmatud - vangla sotsiaaltöötajad / Tiiu Rahuoja

    Index Scriptorium Estoniae

    Rahuoja, Tiiu

    2006-01-01

    Artikli autori, kes töötas Tartu Vangla sotsiaalosakonnas augustist 2004 - novembrini 2005, vanglasotsiaaltöö kogemusest. Kommenteerivad Tallinna vangla sotsiaalosakonna juhataja Eerik Lätti ja Harku vangla sotsiaalosakonna juhataja, sotsiaaltöö mag Christel Punn

  14. Mis võiks olla ühist Johan Laidoneril ja Ingmar Bergmanil / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2008-01-01

    Laretei, Käbi. Kuhu kadus kõik see armastus? : Ingmari kirjad Käbile / tõlge rootsi keelest Anu Saluäär. Tallinn : SE&JS, 2008 ; Laidoner, Johan. Ühtekuuluvuse teel : Johan Laidoneri kirjad abikaasale / koostanud [ja toimetanud] Irene Lään ja Toomas Hiio ; vene keelest tõlkinud Jüri Ojamaa. Tallinn : Varrak, 2008

  15. Mis oli ja mida ei olnud : lisandusi kahele kirjutisele / Tiiu Erelt

    Index Scriptorium Estoniae

    Erelt, Tiiu, 1942-

    2008-01-01

    Lisandusi artiklitele: Koppel, Margit-Mariann. Mahalaskmine pärast surma //Eesti Ekspress, 23. aug. 2007, mis käsitleb Elmar Muugi saatust, ning: Raag, Raimo. Valter Tauli elust ja keelelisest tegevusest // Keel ja Kirjandus, (2007/Nov), nr. 11

  16. Eesti Draamateater tähistas maja 100. sünnipäeva / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2010-01-01

    18. septembril tähistati avatud uste päevaga Eesti Draamateater hoone 100. sünnipäeva. Õhtul sai teatrihoone fassaadilt vaadata Taavet Janseni, Taavi Varmi ja Andres Tenusaare videoinstallatsiooni. Esitleti raamatut "Eesti Draamateatri maja 100" (autorid Karin Hallas-Murula, Kristel Pappel, Haldja Jalajas). Avati Peeter Lauritsa fotonäitus "Pahempidi"

  17. Ühe väljasurnud kala lugu Saaremaalt / Tiiu Märss

    Index Scriptorium Estoniae

    Märss, Tiiu, 1943-

    2011-01-01

    Saaremaalt Himmistest leitud siluriaegse telodondi Phlebolepis elegans Panderi kivististest ning Himmiste paemurru laastamisest ja üle 3500 kivistunud merelooma väljaveost Ameerikasse 1930nendatel William Patteni poolt

  18. Kolm nauditavat näidet nüüdisaegsest tantsust / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2011-01-01

    12. rahvusvahelisest Augusti tantsufestivalist. Brüsselis töötava ameerika koreograafi Daniel Linehani lavastustest "Montage for Three" ja "Not About Everything". Koreograaf David Wampachi (Pariis) lavastusest "Battement". Helsingis asutatud teatritrupi Oblivia triloogia "Entertainment Island" 2. osast, autorid-esitajad Anna Krzystek, Timo Fredriksson, Annika Tudeer

  19. Niguliste kirikul uus orel, Jaani kirikus algab vana taastamine / Tiiu Pikkur

    Index Scriptorium Estoniae

    Pikkur, Tiiu, 1947-

    2005-01-01

    Orelimeister Ago Tint lõpetas 9. saj lõpul Gustav Terkmanni ehitatud oreli (asus kuni 2005. a. alguseni Teatri- ja Muusikamuuseumis) restaureerimise ja orel paigutati Tallinna Niguliste kiriku Püha Antoniuse kabelisse. Sõlmiti Tallinna Jaani kiriku oreli restaureerimise ja uue oreli hankimise leping (töö teostab Saksamaa oreliehitusfirma Martin Ter Haseborg). Mõlema ettevõtmise eestvedajaks on orelikunstnik Andres Uibo

  20. Social consequences of transition : who recognize themselves to be poor in Estonia? / Tiiu Paas, Andres Võrk

    Index Scriptorium Estoniae

    Paas, Tiiu, 1949-

    2003-01-01

    Analüüs, kuidas on omavahel seotud leibkonna sissetulekuga määratud vaesus ja inimeste enda poolt antud hinnang oma majanduslikule olukorrale. Kasutatud on ESA Leibkonna Eelarve Uuringu andmeid aastatest 2000 ja 2001. Tabelid

  1. Dirigent Anu Tali: mind pole ilma meie orkestrita / Anu Tali ; intervjueerinud Tiiu Laks

    Index Scriptorium Estoniae

    Tali, Anu, 1972-

    2009-01-01

    31. mail ja 1. juunil Estonai kontserdisaalis toimuvast Põhjamaade Sümfooniaorkestri kontserdist "Kohtumispaik Eesti", ettekandele tulevatest Erkki-Sven Tüüri teosest, solistidest David Geringas, Marko Martin

  2. Fast potential change in sawteeth in JIPP T-IIU tokamak plasmas

    International Nuclear Information System (INIS)

    Hamada, Y.; Nishizawa, A.; Kawasumi, Y.

    1994-12-01

    Fast changes of electric potential with different polarities are observed during sawtooth oscillation in a core region of a tokamak plasma using a heavy ion beam probe. The potential change inside the inversion radius is found to be positive. The change is negative outside the inversion radius and shows clearly a propagation nature. The observed potential can be interpreted by the mixture of the potentials of two origins. One of them drives the fast MHD plasma motion through E/B drift and the other is a barrier potential induced by mixing of hot and cold plasmas at sawtooth crash. (author)

  3. Jaak Prints: näitleja hirmud on üldinimlikud / Jaak Prints ; intervjueerinud Tiiu Laks

    Index Scriptorium Estoniae

    Prints, Jaak, 1981-

    2010-01-01

    Teatri NO99 näitleja Jaak Prints endast, näitlejaks olemisest, mõistest "mõtlev teater", koduteatrist, NO99 aktsioonist "Ühtne Eesti suurkogu", lavastamise soovist jm. Loetletud Jaak Printsi rollid ja tööd lavastajana

  4. Bauhausi pedagoogika mõju üldhariduslikule kunstiõpetusele / Tiiu Põldemaa

    Index Scriptorium Estoniae

    Põldemaa, Tiiu

    1998-01-01

    20. saj. 20-30-ndatel aastatel välja kujunenud Bauhausi pedagoogika on paljus aluseks viimaste kümnendite kunstiõpetuse suundumuste kujunemisel. Eesti kunstiõpetuses on Bauhausi pedagoogika põhimõtteid osaliselt rakendatud algklasside ühendatud kunsti- ja tööõpetuse õppekavades

  5. EurAsia parim film on venelaste "Minu õnn" / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2010-01-01

    14. Pimedate Ööde Filmifestivali rahvusvahelise võistlusprogrammi EurAsia võidufilmiks valiti David Willise juhitud žürii poolt Sergei Loznitsa mängufilmidebüüt „Minu õnn” ("My Joy", Ukraina- Holland- Saksamaa). Loetletud filmifestivali erinevate konkursside võitjad ja auhinnasaajad

  6. Eesti esinaivisti 100. sünniaastapäev / Tiiu Männiste

    Index Scriptorium Estoniae

    Männiste, Tiiu, 1959-

    2000-01-01

    Paul Kondase 100. sünniaastapäeva puhul tema maalide näitus Viljandi kunstisaalis. Avamisel demonstreeris Mark Soosaar oma filmi "Pühapäevamaalijad". Kilpkonna galeriis näitusel "Veel naiviste" Joan (?Joann) Sõstra (1913-1992) (puuskulptuurid), Osvald Raba (1909-1996) ja Arnold Vihmandi (1912) looming.

  7. Large potential change induced by pellet injection in JIPP T-IIU tokamak plasmas

    International Nuclear Information System (INIS)

    Hamada, Y.; Sato, K.N.; Sakakita, H.

    1995-05-01

    A large, rapid change in the local plasma potential is found to be induced by off-axis hydrogen ice-pellet injection into a tokamak plasma. The polarity of the rapid change is reversed when the pellet is injected into the upper and lower halves of the poloidal plasma cross-section. This change can be interpreted as being due to the gradient-B drift of particles in the high-density plasmas of the pellet cloud, before the increase of the plasma density due to the ablation becomes uniform on the magnetic surface. (author)

  8. Suurbritannia film kliima soojenemisest täna 50 riigi kinodes / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2009-01-01

    Franny Armstrongi dokumentaal-, mängu- ja animafilmi seguna vormistatud filmi "Rumaluse ajastu" ("The Age of Stupid") ülemaailmne esilinastus toimub ÜRO peaassamblee kliimakoosoleku eelõhtul. Eestlased näevad seda Von Krahli teatris

  9. Evaluating the competitiveness of the countries in the Baltic Sea region / Tiiu Paas

    Index Scriptorium Estoniae

    Paas, Tiiu, 1949-

    2004-01-01

    Konkurentsivõime kontseptsioonist, Läänemeremaade konkurentsivõime hindamisest. Uuringu tulemusest selgus, et parim positsioon on regiooni väiksematel (Soome, Taani, Rootsi) riikidel. Üleminekumajandusega maadest on parimad võimalused Eestil. Tabelid. Diagrammid

  10. Tallinnas esinev Šveitsi kuulus tantsutrupp näitab looma inimeses / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2009-01-01

    Oktoobri alguses esineb Tallinnas ja Tartus Šveitsi tantsukompanii Drift, kes esitab lavastuse "Au bleu cochon". Lisaks etendustele annab trupi kunstiline juht Peter Schelling Eesti tantsijatele ja koreograafidele meistriklassi

  11. Rein Kilk ei loobu Pärnust / Rein Kilk ; interv. Tiiu Leis

    Index Scriptorium Estoniae

    Kilk, Rein, 1953-

    2007-01-01

    Ilmunud ka: Linnaleht : Tartu, 12. okt. 2007, lk. 7-8; Linnaleht : Pärnu, 12. okt. 2007, lk. 7-8. Suurärimees Rein Kilk vastab küsimustele vanade majade taastamisest, plaanidest Pärnus, suhtumisest heidikutesse. Kommenteerivad Peeter Raudsepp ja Elmar Lepp

  12. Rein Pakk: olen Jumala trumm, aga sina oled ka / Rein Pakk ; intervjueerinud Tiiu Laks

    Index Scriptorium Estoniae

    Pakk, Rein, 1968-

    2010-01-01

    Intervjuu Rein Pakuga, kellel meeldib kirjutada artikleid ja näidendeid, laval ja filmis mängida, teha sisekujunduslahendusi ja karikatuure. 27. augustil esietendus Tallinna Draamateatris tema esimene lavastajatöö, teatri Vanemuine lavastus "Kaos". Andmeid Rein Paku elu ja loomingu kohta

  13. ERKI moe ülevaatus pakkus täismajale toreda õhtu / Tiiu Oga

    Index Scriptorium Estoniae

    Oga, Tiiu

    2007-01-01

    Eesti Kunstiakadeemia 13.01.2007 Salme kultuurikesksuses toimunud moeetendusest. Lavastaja Kaarel Väli, graafiline kujundus Eiko Ojala, videokunstnikud Taavi Varm ja Aleks Tenusaar koos RGB-ga, lavaline kujundus Ain Nurmela, valguskunstnik Meelis Lusmägi koos ET Valgusega. Korraldajad Jaanika Terasmaa ja Ester Kannelmäe

  14. Voldemar Panso preemia said kaksikvennad Priit ja Märt Pius / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2010-01-01

    Lavakunstikooli 25. lennu üliõpilased Priit ja Märt Pius pälvisid Voldemar Panso nimelise preemia. Terve kursuse esimene bakalaureuselavastus "Jumala Narride Vennaskond" esietendub 4. detsembril Tallinna Linnateatri Põrgulaval. Lavastas kursuse juhendaja Elmo Nüganen

  15. Elu, lugu ja uurimine : metoodilisi vaatepunkte lähiminevikust jutustavate lugude uurimises / Tiiu Jaago

    Index Scriptorium Estoniae

    Jaago, Tiiu, 1960-

    2011-01-01

    Tutvustus: Eda Kalmre. Hirm ja võõraviha sõjajärgses Tartus : pärimuslooline uurimus kannibalistlikest kuulujuttudest. Tartu : Eesti Kirjandusmuuseumi Teaduskirjastus, 2007. (Tänapäeva folkloorist ; 7) ; Ene Kõresaar. Elu ideoloogiad : kollektiivne mälu ja autobiograafiline minevikutõlgendus eestlaste elulugudes. Tartu : Eesti Rahva Muuseum, 2005. (Eesti Rahva Muuseumi sari ; 6)

  16. Isa Philippe Jourdan võttis vastu Tallinna Toomkiriku autasu / Tiiu Pikkur

    Index Scriptorium Estoniae

    Pikkur, Tiiu, 1947-

    2008-01-01

    5. oktoobril toimunud jumalateenistusel Tallinna Toomkirikus anti koguduse selle aasta kultuuripreemia laureaadile, Rooma-Katoliku Kririku Eesti apostellikule administraatorile piiskop Philippe Jourdanile üle Maarja medal

  17. Märts - teatrikuu, nädalavahetusel viis esietendust / Tiiu Laks, Andres Keil

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2008-01-01

    Nädalavahetuse viiest esietendusest : Teatris NO99 William Shakespeare'i "Perikles" Tiit Ojasoo lavastuses, Endlas "Pommimäng" Joseph Helleri näitemängu "Me pommitasime New Havenit" järgi Madis Kalmeti lavastuses, Tallinna Linnateatris Jón Atli Jónassoni "Murdlainetus" Jaanus Rohumaa lavastuses, Eesti Draamateatris Enn Vetemaa-Erki Aule "Sigma TAU C705" Merle Karusoo lavastuses, Rakvere Teatris Urmas Lennuki kirjutatud ja lavastatud "Päeva lõpus"

  18. Aldo Järvsoo: kirivööd ma ei lõigu / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2009-01-01

    Eesti 2008. aasta parim moekunstnik ja auhinna Kuldnõel omanik on Aldo Järvsoo, tema kollektsioonist "Virve". Lühidalt auhinna teiste nominentide Liisi Eesmaa, Tiina Talumehe ja Liivia Leškini kollektsioonidest. Võidukollektsiooni saab 15. märtsini vaadata Tallinna Kaubamaja Naistemaailmas paikneval näitusepinnal

  19. Laste- ja noorteteater on lehviku laiali tõmmanud / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2008-01-01

    Eestis kaheksandat korda toimuvast rahvusvahelisest laste- ja noorteteatrite päevast Eesti Rahvusraamatukogu teatrisaalis, kus näeb tasuta etendusi Emajõe Suveteatrilt, Jõhvi Teatrilt Tuuleveski ja VAT Teatrilt

  20. VAT Teater toob külakosti Hiiumaa lastele ja noortele / Tiiu Talvist

    Index Scriptorium Estoniae

    Talvist, Tiiu

    2009-01-01

    VAT Teater esineb Hiiumaal lastelavastusega "Varblase Priidu" (autor Rudolf Herfurtner, lavastaja Mart Kampus) ja noortelavastusega "Kas sulle meeldib porno?" (autor Klas Abrahamsson, lavastaja Margo Teder)

  1. Madalmaade nukunäitlejate paremik hiilgas Tallinn Treffil / Tiiu Laks

    Index Scriptorium Estoniae

    Laks, Tiiu, 1984-

    2010-01-01

    5.-8. juunini 2010 toimuvast rahvusvahelisest festivalist Tallinn Treff. Hollandi trupi DudaPaiva lavastusest "Needus". Nukunäitleja Neville Tranteri (Austraalia-Holland) lavastusest "Punch ja Judy Afganistanis". Stef Vettersi (Belgia) etendusest "Tema kõrgeausus Ottfriedi tundmatu maailm"

  2. [Liivi Aarma. Põhja-Eesti kogudused ja vaimulikkond 1525-1885. 2. raamat] / Tiiu Reimo

    Index Scriptorium Estoniae

    Reimo, Tiiu, 1953-

    2009-01-01

    Arvustus: Aarma, Liivi. Põhja-Eesti kogudused ja vaimulikkond 1525-1885. 2. raamat. Põhja-Eesti vaimulike lühielulood 1525-1885. Kurzbiographien der Pastoren des Konsistorialbezirks Estland 1525-1885. Herdaminne för Estland Stift: kortbiografi 1525-1885. Pastors of North Estland: short biographies 1525-1885. Tallinn, 2007

  3. Raamatupidamisalases täiendkoolituses osalemise võimalustest / Tiiu Hazak

    Index Scriptorium Estoniae

    Hazak, Tiiu

    2002-01-01

    Ilmunud ka: Buhgalterskije Novosti nr. 6 lk. 39-44. Järg Raamatupidamisuudised nr. 7 lk. 38-39. Koolituskavad ning erinevate koolitusfirmade hinnataseme võrdlus. Tabelid: raamatupidamisalast täiendkoolitust pakkuvad firmad 2001/2002 õ.-a.; koolitajate poolt enampakutud koolitusteemad raamatupidamise valdkonnas 2001/2002. õppeaastal

  4. Kristiina Nurk: ilus võib olla, aga mugav peab olema / Kristiina Nurk ; intervjueerinud Tiiu Laks

    Index Scriptorium Estoniae

    Nurk, Kristiina, 1982-

    2009-01-01

    Intervjuu Kristiina Nurgaga, kes õpib Eesti Kunstiakadeemias disaini ja rakenduskunsti eriala nahakunsti suuna magistrantuuris, on lõpetanud Tartu Kõrgema Kunstikooli reklaamikunsti eriala, soovib saada kingadisaineriks, pälvis Prantsusmaal Saint Rémy-lès-Chevreuse'is toimunud rahvusvahelisel köitekunsti biennaalil ühe peapreemiatest. Kristiina Nurga eluloolisi andmeid, pälvitud preemiad

  5. Viinistu suvi - kultuurikolhoos laieneb veelgi / Tiiu Laks, Tõnu Kaljuste, Sirje Eelma...[jt.

    Index Scriptorium Estoniae

    2008-01-01

    Viinistu ajaloost, kultuurist ja hümnidest. 2008. a. suvekontserte tutvustab Tõnu Kaljuste - esinevad Maarja-Liis Ilus, Koit Toome, ansambel Jäääär, Nargen festivalil esitatakse Joseph Haydni ooper "Elu kuu peal"; katlamaja teatrietendusi tutvustab Hendrik Toompere juunior - etendub tema lavastatud Boguslaw Schaefferi "Loojang", Ingomar Vihmari lavastatud Andrus Kivirähki "Keiserlik kokk" ja välilaval Mart Kivastiku "Eesti asi"; kuraator Sirje Eelma toob välja Maarit Murka, August Künnapu, Pusa ja Toomas Kuusingu teosed. Üritusi ootab Emil Urbeli ja Toivo Raidmetsa endisest külmmahutist ümberehitatud kabel

  6. Radical-induced generation of small silver particles in SPEEK/PVA polymer films and solutions: UV-Vis, EPR, and FT-IR studies.

    Science.gov (United States)

    Korchev, A S; Konovalova, T; Cammarata, V; Kispert, L; Slaten, L; Mills, G

    2006-01-03

    The present study is centered on the processes involved in the photochemical generation of nanometer-sized Ag particles via illumination at 350 nm of aqueous solutions and cross linked films containing sulfonated poly(ether ether ketone) and poly(vinyl alcohol). Optical and electron paramagnetic resonance experiments, including electron nuclear double resonance data, proved conclusively that the photogenerated chromophore exhibiting a band with lambda(max) = 565 nm is an alpha-hydroxy aromatic (ketyl) radical of the polymeric ketone. This reducing species was produced by illumination of either solutions or films, but the radical lifetime extended from minutes in the fluid phase to hours in the solid. Direct evidence is presented that this long-lived chromophore reduces Ag(I), Cu(II), and Au(III) ions in solution. A rate constant of k = 1.4 x 10(3) M(-)(1) s(-)(1) was obtained for the reduction of Ag(+) by the ketyl radical from the post-irradiation formation of Ag crystallites. FTIR results confirmed that the photoprocess yielding polymeric ketyl radicals involves a reaction between the macromolecules. The photochemical oxidation of the polymeric alcohol, as well as the formation of light-absorbing macromolecular products and polyols, indicates that the sulfonated polyketone experienced transformations similar to those encountered during illumination of the benzophenone/2-propanol system.

  7. Raivo Tafenau: olen võetud väärikasse seltskonda / Raivo Tafenau ; intervjueerinud Tiiu Laks

    Index Scriptorium Estoniae

    Tafenau, Raivo, 1963-

    2010-01-01

    Vestlus Jazzkaare raames 28. aprillil toimunud Eesti džässiauhindade väljaandmisel Eesti džässiauhinna pälvinud saksofonistiga. Noore džässitalendi auhind anti Peedu Kassile, džässiedendaja auhind Boris Paršinile

  8. 'Videokunst on tõsine asi,' räägib kunstnik Al Paldrock / Al Paldrok ; interv. Tiiu Leis

    Index Scriptorium Estoniae

    Paldrok, Al, 1969-

    1998-01-01

    Intervjuu Pärnu filmipäevade (2.-4. apr.) ühe peakorraldaja, Helsingis Kuvataide akadeemias video- ja keskkonnakunsti õppinud Al Paldrokiga filmipäevadest (kus esitatakse nii video-, reklaam- kui dokumentaalfilme), eesti filmist ja videokunstist, rühmitusest 'Vedelik'

  9. Grand Prix' võitis reklaamfilmistuudio Division / Mait Laas, Jaak Lõhmus, Ants Vist...[jt.] ; interv. Tiiu Leis

    Index Scriptorium Estoniae

    1998-01-01

    Pärnu filmipäevadel 'Do Re Vi' võitis Grand Prix ehk skulptuuri 'Oskar & Ella' reklaamistuudio 'Division', kullatud videokassetid said 'Polarfilm' (dok. film), Martin Pedanik (video) ja Edith Sepp ('Tingimustega Tallinnas'); osalejate M. Laasi, J. Lõhmuse, A. Visti ja I. Raagi kommentaare ürituse kohta;

  10. Saa võimust : [luuletused] / J{u00E1nos Pilinszky ; tlk. Tiiu Kokla, Kairi Mesipuu

    Index Scriptorium Estoniae

    Pilinszky, J{u00E1nos

    2004-01-01

    Sisu: Saa võimust ; Trapets ja tõke ; Talvise taeva all ; Ühe kire marginaaliks ; Harbach 1944 ; Armastuse kõrb ; Apokrüüf ; Nelik ; Järelsõna ; Introitus ; Van Gogh ; Väike öömuusika ; Timuka päevikust ; Madalseisu pidu ; Pole muud ; Ravensbrücki passioon ; Van Goghi palve ; Kadunud poja otsimine ; Su käsi, mu käsi ; Salamõrv ; Luuletus ; Peks ; 22. detsember 1970 ; Visand ; Kolmandal päeval ; Kadunud pojad ; Lõpetamata minevik. Eluloolisi andmeid autori kohta lk. 181-182

  11. EU enlargement and trade integration : can we distinguish the Baltic Sea region cluster? / Tiiu Paas, Egle Tafenau

    Index Scriptorium Estoniae

    Paas, Tiiu, 1949-

    2004-01-01

    Uurimistulemused kinnitavad piiriüleste kaubandussidemete olemasolu ning Läänemere regiooni riikide omavahelise kaubandusintegratsiooni tugevust ühinevas Euroopas, millega tuleb EL-i regionaalpoliitika kujundamisel arvestada. Diagrammid. Tabel

  12. Uni = elu / Lea Noormets ; kommenteerinud Jean-François Bouvet, Marlit Veldi, Tiiu Väinsaar

    Index Scriptorium Estoniae

    Noormets, Lea

    2012-01-01

    Und mõjutavatest teguritest ja unehäirete, s.h ajavahestressi leevendamisest ning ravist homöopaatia, toiduravi, taimravi e fütoteraapia, energeetilise meditsiini või valgusteraapiaga. Artikkel tugineb Gerard Pacaud' raamatule Le Sommeil, c'est vital

  13. Salonen: kõik tšetšeenid juba ootavad seda filmi / Hannu Salonen ; intervjueerinud Tiiu Laks

    Index Scriptorium Estoniae

    Salonen, Hannu, 1972-

    2009-01-01

    Režissöör oma uuest mängufilmist "Vasha" (endine tööpealkiri "Kid ja Killer"), Eesti, Soome, Saksamaa ja Iirimaa koostööfilm, kus kesksetes osades on eestlastest Mart Müürisepp, Rein Oja, Jan Uuspõld jt

  14. Prokurör nägi inimliku jõhkruse piiritust / Hinge Brand ; interv. Tiiu Põld

    Index Scriptorium Estoniae

    Brand, Hinge, 1940-2007

    2006-01-01

    Intervjuu ametist lahkuva prokurör Hinge Brandiga. Lisatud: Hinge Brandi CV; Hinge Brandi osavõtul peetud kõmulisemad mõrvaprotsessid. Kommenteerivad Aivar Pilv, Elmar Vaher, Alar Kirs, Eda Murak, Dilaila Nahkur-Tammiksaar

  15. Kutseharidusega inimesed tööturul = People with vocational education in the labour market / Tiiu-Liisa Rummo

    Index Scriptorium Estoniae

    Rummo, Tiiu-Liisa

    2007-01-01

    Eesti tööealises rahvastikus on 2005. aasta tööjõu-uuringu andmetel kutse (keskeri-)haridusega inimesi 36,5% - mehi 48,6% ja naisi 51,4%, vähenemas on kutseharidusega inimeste töötuse määr. Lisatud tabelid ja diagrammid

  16. Viga on öelda, et me ei vaja PRi / Roger Hayes, Alasdair Sutherland ; interv. Tiiu Värbu

    Index Scriptorium Estoniae

    Hayes, Roger

    2001-01-01

    Eesti Suhtekorraldajate Liidu 5. aastapäeva seminaril osalevad Rahvusvahelise Kommunikatsiooni Instituudi direktor R. Hayes ja maailma ühe juhtiva suhtekorraldusfirma Manning, Selvage & Lee asepresident A. Sutherland

  17. Mäed, puud, rohukõrred : [luuletused] / Domokos Szil{u00E1gyi ; tlk. Tiiu Kokla

    Index Scriptorium Estoniae

    Szil{u00E1gyi, Domokos

    2004-01-01

    Sisu: Mäed, puud, rohukõrred ; Väiksed armuhümnid ; Nõid ; Katke kinni vanaisa ; Pööripäev ; Avaldus ; Kelles iseoma südametunnistusele koputad ; Süüdistus ; Tee nii, et armastaksin ; Circumdederunt ; Hädamaandumine. Eluloolisi andmeid autori kohta lk. 297-298

  18. Regional income convergence during the pre-enlargement period of the European Union / Tiiu Paas, Andres Kuusk, Friso Schlitte

    Index Scriptorium Estoniae

    Paas, Tiiu, 1949-

    2006-01-01

    Artikli analüüsiobjektiks on tulutasemete ebavõrdsus ja konvergents EL-25 riikides. Regionaalsete tulutasemete analüüsi tulemused annavad tunnistust olulisest regionaalsest ebavõrdsusest nii Euroopa Liidu vanades kui uutes (analüüsitaval perioodil veel kandidaatriikides) liikmesriikides. Tabelid

  19. Eesti kultuurielu sovetiseerimine : Nõukogude kultuuripoliitika eesmärgid ja institutsionaalne raamistik aastatel 1944-1954 / Tiiu Kreegipuu

    Index Scriptorium Estoniae

    Kreegipuu, Tiiu

    2007-01-01

    Ka vaimse kultuuri vallas kehtestati valdkondade hierarhia. Esikohale seati kirjandus. Kogu kultuuri kirjeldamisel valitses vulgaarsotsioloogiline meetod. Välise surve tagajärjel hakkas süvenema kõige tõhusam tsensuuriliik - enesetsensuur. Teistest kunstiküsimustest eraldati institutsiooniliselt arhitektuuriasjad

  20. Aitab jumalateenistust paremini korraldada / Tiiu Pikkur ; kommenteerinud Tiit Salumäe, Jaak Salumäe, Arne Hiob

    Index Scriptorium Estoniae

    Pikkur, Tiiu, 1947-

    2009-01-01

    17. märtsil peeti Tallinna Piiskoplikus Toomkirikus tänujumalateenistus, kus esitleti Eesti luterliku rahvakiriku esimese Eestimaal koostatud ja trükitud liturgiakäsiraamatu - neljaköitelise kirikukäsiraamatu kaht esimest osa: "Jumalateenistuste käsiraamatut" ja "Talituste käsiraamatut"

  1. Püstised hobused : [luuletused] / Sándor Kányádi ; tlk. Tiiu Kokla, Arvo Valton

    Index Scriptorium Estoniae

    Kányádi, Sándor

    2004-01-01

    Sisu: Püstised hobused ; Purjus Agamemnon ; Kiviaeg ; Puust puuni ; Kuulutaja ingel ; In memoriam Domokos Szil{u00E1gyi ; In memoriam L. Sz. ; Ja isegi surmatunnil ; Maja ees terve öö ; Pühendus ; Kivitrükk ; Värsskroonika ; Seejärel ; Suurel neljapäeval ; Eemaldudes ; Justkui vaid nali ; Keegi kõnnib puude ladvus ; Sel õhtul ; Ei taha sulle haiget teha ; XC psalm ; Pilliroog ; Hobused ; Panta rhei ; Siis tõuseb lendu ; Sest senikaua kestab ; Jutuke ; Pärast esimest hoopi ; Ükskord ; Prometheus ; Õnneseen ; Ilustusteta laul ; On maid ; Jumala selja taga ; Võiksin öelda ; Võim ; Ajalootund. Eluloolisi andmeid autori kohta lk. 333-334

  2. Liberalistlik sissejuhatus poliitilisse filosoofiasse / Tanel Vallimäe, Peeter Selg

    Index Scriptorium Estoniae

    Vallimäe, Tanel, 1975-

    2008-01-01

    Vastukaja arvustusele: Reiland, Indrek. Normatiivse poliitikafilosoofia peateemad (Rets. rmt.: Wolff, Jonathan. Sissejuhatus poliitikafilosoofiasse / tlk. Tiiu Hallap. Tartu, 2005). Akadeemia, 2008, nr. 4, lk. 880-883

  3. Peeter Saks maksab karmavõlga / Paavo Kangur

    Index Scriptorium Estoniae

    Kangur, Paavo, 1966-

    2006-01-01

    Investeerimispanga Suprema Securities juhatuse esimees Peeter Saks oma sportlasekarjäärist, muudatustest investeerimispanga juhtkonnas ning panga tegevusest sportlaste toetamisel. Kommenteerib mäesuusataja Tiiu Nurmberg

  4. Increasing the proton conductivity of sulfonated polyether ether ketone by incorporating graphene oxide: Morphology effect on proton dynamics

    Science.gov (United States)

    Leong, Jun Xing; Diño, Wilson Agerico; Ahmad, Azizan; Daud, Wan Ramli Wan; Kasai, Hideaki

    2018-03-01

    We synthesized graphene oxide-sulfonated polyether ether ketone (GO-SPEEK) composite membrane and compare its proton conductivity with that of Nafion® 117 and SPEEK membranes. From experimental measurements, we found that GO-SPEEK has better proton conductivity (σGO-SPEEK = 3.8 × 10-2 S cm-1) when compared to Nafion® 117 (σNafion = 2.4 × 10-2 S cm-1) and SPEEKSPEEK = 2.9 × 10-3 S cm-1). From density functional theory (DFT-) based total energy calculations, we found that GO-SPEEK has the shortest proton diffusion distance among the three membranes, yielding the highest tunneling probability. Hence, GO-SPEEK exhibits the highest conductivity. The short proton diffusion distance in GO-SPEEK, as compared to Nafion® 117 and SPEEK, can be attributed to the presence of oxygenated functional groups of GO in the polymer matrix. This also explains why GO-SPEEK requires the lowest hydration level to reach its maximum conductivity. Moreover, we have successfully shown that the proton conductivity σ is related to the tunneling probability T, i.e., σ = σ‧ exp(-1/T). We conclude that the proton diffusion distance and hydration level are the two most significant factors that determine the membrane’s good conductivity. The distance between ionic sites of the membrane should be small to obtain good conductivity. With this short distance, lower hydration level is required. Thus, a membrane with short separation between the ionic sites can have enhanced conductivity, even at low hydration conditions.

  5. Tallinna Ülikooli Infoteaduste Instituut avab 2014. aastal bakalaureuse- ja magistriõppes uued õppesuunad / Aira Lepik, Aile Möldre, Tiiu Reimo

    Index Scriptorium Estoniae

    Lepik, Aira, 1958-

    2014-01-01

    Magistriõppes avatakse infoteaduse, digitaalraamatukogunduse ja dokumentaalse kultuuripärandi haldamise õppesuunad, bakalaureuseõppes saab õppida infoteadust, raamatukogu- ja infotööd ning veebisisu loomist ja korraldust

  6. Tallinna raamatuturg 17. sajandi teisel poolel : raamatukaupmees August Johann Beckerist 1673. aastal Tallinna jäänud raamatud / Tiiu Reimo

    Index Scriptorium Estoniae

    Reimo, Tiiu, 1953-

    2014-01-01

    Raamatukaubanduse ja raamatuomandi uurimisest Eestis. Raamatukauplejatest 17. sajandi Tallinnas. Beckeri raamatute loendist ja teoste identifitseerimisest. Raamatuvara sisulisest koostisest, autoritest ja teostest.

  7. Meie skandaalitsesime ka! Jaanipäeval võttis MM suuna teatrifestivalile "Baltoscandal" / Anu Aaremäe, Tiiu Suvi

    Index Scriptorium Estoniae

    Aaremäe, Anu

    2000-01-01

    Meeldejäävaimaid "teatripärleid" Rakvere teatrifestivalilt "Baltoscandal 2000" : Oskaras Korshunovas Theatre, Marius von Mayenburgi "Tule nägu" ("The Face of Fire"), lavastaja O. Korshunovas, Pit Uttoni ühemehetükk "Adolf", Sasha Pepeljajevi trupi "One Second Hand" ja poola "Moisture", lavastaja Madzik Leszek

  8. Linnagaleriis avati ülevaatenäitus 'Pärnu sügis 98' / Leonhard Lapin, Inge Teder ; interv. Tiiu Leis

    Index Scriptorium Estoniae

    Lapin, Leonhard, 1947-

    1998-01-01

    14. okt avati Pärnu Linnagaleriis Pärnu kunstnike maalinäitus, töid valisid Kunstiakadeemia õppejõud Leonhard Lapin ja Inge Teder ning Linnagalerii nõukogu liige Feliks Krapp. Intervjuu L. Lapini ja Inge Tederiga.

  9. Digitaalmälu seminaril räägiti veebisisu säilitamisest / Jaanus Kõuts, Tiiu Daniel, Elis Karpov

    Index Scriptorium Estoniae

    Kõuts, Jaanus, 1976-

    2015-01-01

    Ülevaade 28. jaanuaril Eesti Rahvusraamatukogus toimunud järjekorras kuuendast rahvusvahelisest seminarist sarjast Digitaalmälu (Digital Memory) pealkirjaga „Veebiarhiveerimise roll andmerikka ühiskonna ajaloo säilitamisel” (Web Archiving: Preserving the History of Data-Driven Society)

  10. Täiskasvanute õppimisvõimalused ja -valmidus = Adult education possibilities and readiness to study / Tiiu-Liisa Rummo-Laes

    Index Scriptorium Estoniae

    Rummo-Laes, Tiiu-Liisa

    2009-01-01

    Artiklis analüüsitakse Eesti ettevõtete koolitusvalmidust ja õppimisvõimaluste pakkumist ning 25-64-aastaste õppimisvalmidust. Kasutatud on nii 2005. aasta uuringu "Täiskasvanute koolitus ettevõtetes" kui ka 2007. aasta täiskasvanute koolituse uuringu andmeid

  11. Milline mentor kõik tuksi keerab? Ja milline on hea mentor? / Marit Pajulaid, Agne Puusaar, Kaido Aettik ; kommenteerinud Tiiu Allikvee

    Index Scriptorium Estoniae

    Pajulaid, Marit

    2010-01-01

    Küsimuste üle, milline peab olema hea mentor ning mida ta peaks ja mida ta ei tohiks teha, arutlevad Fontese pooleaastase mentorprogrammi läbinud Fazer Eesti juhtrühma liige Marit Pajulaid, reklaamibüroo Division personalijuht Agne Puusaar ning endine Kuusakoski juhatuse esimees Kaido Aettik

  12. A role of neutral hydrogen in CHS plasmas with reheat and collapse and comparison with JIPP T-IIU tokamak plasmas

    International Nuclear Information System (INIS)

    Morita, S.; Yamada, H.; Iguchi, H.

    1992-09-01

    Results are described on NBI plasmas of the Compact Helical System (CHS). An increase in the stored energy, which is called plasma 'reheat', is observed with density peaking when gas puffing is turned off in the high density region. A plasma collapse with large increase in radiation loss occurs even in discharges whose Z eff values (typically, less than 2-3) do not show any increase when the gas puffing is continued. Both phenomena are basically explained by the edge electron temperature due to the difference in the amount of edge hydrogen neutrals. After turning off the gas puffing, the central electron density n e0 shows an increase of 80% and the density peaking factor (n e0 /n-bar e ) changes from 1.0 to 2.0, in typical cases, and a high inward velocity of the impurities appears (v = 20 m/s). The accumulation is studied in relation to the poloidal rotation and the edge temperature. These results are compared with results from plasmas with IOC- and H-modes in the JIPPT-IIU tokamak. (author)

  13. Minevikutõlgenduste ja ajakäsituste uurimine pärimusliku ajaloo vaatepunktist : kahe temaatilise jutustuse näitel / Tiiu Jaago

    Index Scriptorium Estoniae

    Jaago, Tiiu, 1960-

    2004-01-01

    Virumaa tööstusala arengut käsitlevast kahest kirjalikust jutustusest aastatest 1961 ja 2001. Artiklis analüüsitakse sündmuste ja jutustamise aja omavahelisi seoseid ning ajastu tõlgendamist mõjutavaid tegureid

  14. Ökoloogia ja keskkonnateaduste doktorikool : täitus aasta projekti käivitumisest TLÜs / Tiiu Koff

    Index Scriptorium Estoniae

    Koff, Tiiu, 1955-

    2006-01-01

    Koostöös Ökoloogia ja keskkonnateaduste doktorikooliga toimusid Tallinna Ülikoolis Exeteri Ülikooli professor Christopher J. Caseldine ja Hulli Ülikooli lektor Jane Buntingi loengud ning Post-POLLANDCAL teadusvõrgustiku seminar Ökoloogia Instituudis

  15. Fotorealismi pool sajandit ehk ühe "-ismi" mitu lainet = Half a century of photorealism, or several waves of one "-ism" / Tiiu Parbus

    Index Scriptorium Estoniae

    Parbus, Tiiu, 1989-

    2016-01-01

    Rahvusvaheline näitus "Fotorealism. 50 aastat hüperrealistlikku maali" Kumus eksponeerib algupärase fotorealismi superstaare. Koostanud Tübingeni Kultuurivahetuse Instituut, kuraator Otto Letze. Eesti hüperrealismi seoseid Ameerika algupärandiga

  16. Slalomiste Oprjat ja Nurmbergi muserdavad rasked traumad / Priit Pullerits

    Index Scriptorium Estoniae

    Pullerits, Priit, 1965-

    2006-01-01

    Eesti mäesuusataja Deyvid Oprja selg ja Tiiu Nurmbergi põlv on nii tõsiselt viga saanud, et neid abistava kiropraktiku Allan Austin Oolo hinnangul on mõlema sportlase olukord äärmiselt tõsine. Tiiu Nurmberg lõpetas oma etteaste 44. kohaga

  17. Zebra - sõbralik ja lillelõhnaline / Ell-Maaja Randküla

    Index Scriptorium Estoniae

    Randküla, Ell-Maaja, 1939-2016

    2006-01-01

    Tallinnas Narva mnt. 7 asuva kohviku Zebra sisekujundus. Sisearhitekt Tiiu Truus. Ehitus: AS KMG Ehitus. Materjalidest on kasutatud triibulise mustriga puitu Zebrano ja looduskivi. Laes on dekoratiivsed lipud, mille graafiline kujundus on Tiiu Priskolt ja Mati Veermetsalt. Tualettruumi looduskivist valamu ja põrandavaasi autor on Kaido Kivi. Ill.: põhiplaan, 11 värv. vaadet

  18. Kunstiga Eestimaad avastamas / Mart Helme

    Index Scriptorium Estoniae

    Helme, Mart, 1949-

    2006-01-01

    Kirjastuselt "Kunst" ilmunud uued raamatud: "Eestimaa. Looduse teejuht", tekst ja fotod Tiit Hunt; "Eestimaa. Linnuste teejuht", tekst Mart Helme; "Eestimaa. Kirikute teejuht", tekst Mart Helme, fotod Peeter Säre; "Eestimaa. Kultuurituristi teejuht", koostaja Tiiu Viirand; "Eestimaa. Ranniku teejuht", tekst Tiiu Viirand; "Eestimaa mõisate teejuht", fotod Peeter Säre, tekst Mart Helme, Alfred Wells

  19. Delta Plaza kohvik = Delta Plaza cafe

    Index Scriptorium Estoniae

    2010-01-01

    Tallinnas Pärnu mnt 141 asuva kohviku Delta Plaza sisekujundusest. Sisearhitektid Tiiu Truus ja Marja Viltrop (Stuudio Truus OÜ). Tiiu Truusi tähtsamate tööde loetelu. Büroohoone Delta Plaza arhitektid Marika Lõoke ja Jüri Okas (AB J. Okas & M. Lõoke)

  20. Sulfonated poly(tetramethydiphenyl ether ether ketone) membranes for vanadium redox flow battery application

    Energy Technology Data Exchange (ETDEWEB)

    Mai, Zhensheng; Bi, Cheng; Dai, Hua [PEMFC Key Materials and Technology Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Zhongshan Road 457, Dalian 116023 (China); Graduate University of the Chinese Academy of Sciences, Beijing 100039 (China); Zhang, Huamin; Li, Xianfeng [PEMFC Key Materials and Technology Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Zhongshan Road 457, Dalian 116023 (China)

    2011-01-01

    Sulfonated poly(tetramethydiphenyl ether ether ketone) (SPEEK) with various degree of sulfonation is prepared and first used as ion exchange membrane for vanadium redox flow battery (VRB) application. The vanadium ion permeability of SPEEK40 membrane is one order of magnitude lower than that of Nafion 115 membrane. The low cost SPEEK membranes exhibit a better performance than Nafion at the same operating condition. VRB single cells with SPEEK membranes show very high energy efficiency (>84%), comparable to that of the Nafion, but at much higher columbic efficiency (>97%). In the self-discharge test, the duration of the cell with the SPEEK membrane is two times longer than that with Nafion 115. The membrane keeps a stable performance after 80-cycles charge-discharge test. (author)

  1. Effect of degree of sulfonation and casting solvent on sulfonated poly(ether ether ketone) membrane for vanadium redox flow battery

    Science.gov (United States)

    Xi, Jingyu; Li, Zhaohua; Yu, Lihong; Yin, Bibo; Wang, Lei; Liu, Le; Qiu, Xinping; Chen, Liquan

    2015-07-01

    The properties of sulfonated poly(ether ether ketone) (SPEEK) membranes with various degree of sulfonation (DS) and casting solvent are investigated for vanadium redox flow battery (VRFB). The optimum DS of SPEEK membrane is firstly confirmed by various characterizations such as physicochemical properties, ion selectivity, and VRFB single-cell performance. Subsequently the optimum casting solvent is selected for the optimum DS SPEEK membrane within N,N‧-dimethylformamide (DMF), N,N‧-dimethylacetamide (DMAc), N-methyl-2-pyrrolidone (NMP), and dimethylsulfoxide (DMSO). The different performance of SPEEK membranes prepared with various casting solvents can be attributed to the different interaction between solvent and -SO3H group of SPEEK. In the VRFB single-cell test, the optimum SPEEK membrane with DS of 67% and casting solvent of DMF (S67-DMF membrane) exhibits higher VRFB efficiencies and better cycle-life performance at 80 mA cm-2. The investigation of various DS and casting solvent will be effective guidance on the selection and modification of SPEEK membrane towards VRFB application.

  2. Treatment of two different water resources in desalination and microbial fuel cell processes by poly sulfone/Sulfonated poly ether ether ketone hybrid membrane

    International Nuclear Information System (INIS)

    Ghasemi, Mostafa; Wan Daud, Wan Ramli; Alam, Javed; Ilbeygi, Hamid; Sedighi, Mehdi; Ismail, Ahmad Fauzi; Yazdi, Mohammad H.; Aljlil, Saad A.

    2016-01-01

    The PS (Polysulfone)/SPEEK (sulfonated poly ether ether ketone) hybrid membranes were fabricated and modified with low and high DS (degrees of sulfonation) for the desalination of brackish water and proton exchange membrane in microbial fuel cell. The results illustrated that SPEEK has changed the morphology of membranes and increase their hydrophilicity. PS/SPEEK with lower DS (29%) had the rejection percentage of 62% for NaCl and 68% for MgSO_4; while it was 67% and 81% for PS/SPEEK (76%) at 4 bars. Furthermore, the water flux for PS at 10 bar was 12.41 L m"−"2 h"−"1. It was four times higher for PS/SPEEK (29%) which means 49.5 L m"−"2 h"−"1 and 13 times higher for PS/SPEEK (76%) with means 157.76 L m"−"2 h"−"1. However, in MFC (microbial fuel cell), the highest power production was 97.47 mW/m"2 by PS/SPEEK (29%) followed by 41.42 mW/m"2 for PS/SPEEK (76%), and 9.4 mW/m"2 for PS. This revealed that the sulfonation of PEEK (poly ether ether ketone) made it a better additive for PS for desalination, because it created a membrane with higher hydrophilicity, better pore size and better for salt rejection. Although for the separator, the degree of sulfonation was limited; otherwise it made a membrane to transfer some of the unwanted ions. - Highlights: • Fabrication of a composite membrane for desalination and MFC. • PS/SPEEK (76%) had the lowest contact angle (48.8) and highest hydrophilicity than PS and PS/SPEEK (29%). • PS/SPEEK (29%) was the best separator for use in MFC. • PS/SPEEK (76%) had the highest flux (61.3 L m"−"2 h"−"1) for desalination.

  3. Karjamaa, pilved... Franz Liiv ja Juhan Kafka / Toomas Raudam

    Index Scriptorium Estoniae

    Raudam, Toomas, 1947-

    1998-01-01

    Varem ilmunud: Postimees, 1996, 7.sept. Rets. rmt.: Kafka, Franz. Kirjad Milenale / tlk. Tiiu Relve. Tallinn : Perioodika, 1996. (Loomingu Raamatukogu ; 27-30, 1996; Liiv, Juhan. Mu kallis Liisi / koost. Aarne Vinkel. Tartu : Ilmamaa, 1996

  4. Eesti laste suvi

    Index Scriptorium Estoniae

    2010-01-01

    Laste suvisest koolivaheajast räägivad Eesti omavalitsuse ametnikud ja sotsiaaltöötajad: Kaasi Almers, Inna Kask, Aasa Saarna, Ülle Rajasalu, Merle Leopard, Aime Koger, Margit Pajo, Pilleriin Aalde, Andres Julle ja Tiiu Kuus

  5. Katrin Kuldma - obladatelnitsa "Zolotoi iglõ" / Olga Grigorjeva

    Index Scriptorium Estoniae

    Grigorjeva, Olga, 1983-

    2007-01-01

    FIBIT-i moepäevadest ja Kuldnõela galast. Kuldnõela nominendid olid Reet Aus, Katrin Kuldma, Marika Siska ja Tiiu Roosma. 2006. a. moepreemia "Kuldnõel" sai kollektsiooni "Chocolat" eest Katrin Kuldma

  6. Sügiskonverents "Kunst paguluses"...

    Index Scriptorium Estoniae

    2008-01-01

    28. VIII Kumu Kunstimuuseumi auditooriumis toimuva konverentsi kava. Esinevad Jaan Undusk, Piret Kruuspere, Avo Hirvesoo, Mara Lace, Osvaldas Daugelis, Piret Noorhani, Irja Bergström, Tiiu Talvistu ja Kersti Koll

  7. "Neiseri" büroohoone = The Neiser Office Building / Piret Lindpere

    Index Scriptorium Estoniae

    Lindpere, Piret, 1963-

    2003-01-01

    2002. a. valminud kontori sisekujundusest. Sisearhitekt Tiiu Truus. Hoone arhitekt Indrek Näkk. Kontorimööbli ja lükanduksed valmistas Võru firma "Private Project". Bürooseintel Rein Kelpmani maalid. Ill.: kontori planeering, 6 vaadet

  8. Kubija Hotell-Loodusspaa = Kubija Hotel-Nature Spa

    Index Scriptorium Estoniae

    2012-01-01

    Võrus Männiku tee 43A asuva Kubija Hotell-Loodusspaa sisekujundusest. Sisearhitektid Tiiu Truus ja Birgit Jaanus (Stuudio Truus). Arhitektid Indrek Tiigi ja Helle-Triin Hansumäe. Loetletud Stuudio Truus tehtud töid

  9. Varakambri lahtine värav / Katrin Kaugver

    Index Scriptorium Estoniae

    Kaugver, Katrin, 1950-

    2008-01-01

    Uppsalas toimunud CERL-i (Consortium of European Research Libraries) vanaraamatu seminar "Käsikiri, trükis ja internet", kus TLÜ professor Tiiu Reimo andis ülevaate meie raamatukogude ja arhiivide vanatrükiste kogudest

  10. Artur Lemba - tunglakandja : Ühe suurmehe metaelulugu / Ene Metsjärv ; intervjueerinud Marju Riisikamp

    Index Scriptorium Estoniae

    Metsjärv, Ene, 1943-

    2014-01-01

    Pianist, helilooja ja pedagoog Artur Lemba elust ja loometööst. A. Lemba õpilaste Veera Lensini, Salme Lohuaru (kuni 1950 Andre), Valentine Riivese, Tiiu Targamaa, Villem Reimanni ja Elsa Avessoni ülestähendusi oma õpetajast

  11. Heldi Thomson

    Index Scriptorium Estoniae

    1997-01-01

    Teaduspreemia autorite kollektiivile arstiteaduse alal töö "Vähktõbi Eestis 1968-1992: haigestumus, levimus, elulemus ja suremus" eest - Mati Rahu (kollektiivi juht), Tiiu Aarelaid, Kaja Gornoi, Heldi Thomson

  12. Kirev moepilt / Britt Rosen

    Index Scriptorium Estoniae

    Rosen, Britt, 1968-

    2007-01-01

    FIBITi moepäevadest Tallinnas Viru keskuses, stilistid Gerli Tinn, Liisi Eesmaa, Kirill Safonov. Kuldnõela auhinna pälvis Katrin Kuldma kollektsiooni Chocolat eest. Oma loomingut esitlesid Reet Aus, Tiiu Roosma, Marika Siska

  13. Eramu interjöör Aaviku elamurajoonis Harjumaal = Interior of a private home, Aaviku / Epp Lankots

    Index Scriptorium Estoniae

    Lankots, Epp, 1976-

    2005-01-01

    Aaviku asumi tüüpmaja sisekujunduse kontseptsioon on rajatud vineeri erinevatele kasutusviisidele. Vineeriga on kaetud seinad, laed, vineerist on köögilaud ja selle jalad jm. Sisearhitekt Tiiu Truus. 5 värv. ill

  14. Tartusse tuleb Wilde'i ja Vilde monument

    Index Scriptorium Estoniae

    1998-01-01

    Tartu kesklinnas Wilde Irish Pubi ees peaks 1999. a. kevadel avatama kirjanike Oscar Wilde'i ja Eduard Vilde pronkskujud. Elusuuruses kirjanikud hakkavad istuma graniitistmel. Idee autorid - pubipidaja Liam Allen, ettevõtja Marju Unt, skulptor Tiiu Kirsipuu.

  15. Kuni 21. III on Tartu Kunstimajas vaadata Eesti Nahakunstnike Liidu näitust "Nahk on ruumis"

    Index Scriptorium Estoniae

    2004-01-01

    Kujundaja Tea Tammelaan. Osalevad Tiiu Tulev, Pille Kivihall, Rete Kalder, Ulla Torop, Tiina Piisang, Rutt Maantoa jt. Eksponeeritakse ka jaapanlannast animatsioonikunstniku Maya Jonesho eesti köitekunstnikega koos tehtud filmi

  16. Eesti graafikud Krakówi triennaalil

    Index Scriptorium Estoniae

    2009-01-01

    16. septembril Poolas avatud Krakówi rahvusvahelise graafikatriennaali peanäitusel ja satelliitnäitustel esindavad Eestit Eve Kask, Ülle Marks, Benjamin Vasserman, Tiiu Prisko, Mati Veermets, Evi Tihemets

  17. Dive TeenindusTop : ehituspoodidest parim teenindus Ehitus Service'is / Riin Undusk, Kaspar Jänes

    Index Scriptorium Estoniae

    Undusk, Riin

    2006-01-01

    Uuringufirma Dive hindas veebruaris ehituspoodide teenindust, mille käigus selgus, et kõige parem teenindus on Ehitus Service'is. Diagramm. Vt. samas: Tiiu Kütson, Rauno Haabmets. Kindlustunne muudab teenindajad pühendunuks

  18. Rozhdenije "Biologitsheskogo natshala" Ivana Zubaki : Tallinn-Uels, sentjabr 2002 g / Ivan Zubaka ; interv. Svetlana Hristoforova

    Index Scriptorium Estoniae

    Zubaka, Ivan

    2002-01-01

    IV rahvusvahelisest puuskulptuurisümpoosiumist Wales'is, organiseerijaks skulptor Tom Gilhespy: korraldusest, oma skulptuuri "Bioloogiline alge" valmimisest. Eestist osalesid veel Tiiu Kirsipuu, Aime Kuulbusch, Urmas Rauba ja Ekke Väli

  19. "Külvaja" kui maaelu "Oscar" / Silja Lättemäe

    Index Scriptorium Estoniae

    Lättemäe, Silja, 1952-

    2006-01-01

    Ferdi Sannamehe 1927. a. valminud pronksskulptuuri "Külvaja" vähendatud koopiast, mis antakse Aasta Põllumehe konkursi võitjale esmakordselt 2006. a. Koopia modelleerija Tiiu Kirsipuu. Theodor Poolile 1928. a. kingitud originaalkujul tekst " Riigivanemalt parimale talumajapidamisele Eestis"

  20. Hoone nagu üllatusmuna

    Index Scriptorium Estoniae

    2009-01-01

    2009. a. jaanuaris Tallinnas Vene t. 22 taasavatud Vanalinna Hariduskolleegiumi gümnaasiumi koolimajast. Remonditi ja restaureeriti kõik siseruumid, fassaad, katus ja siseõu. Projekteerija: Amhold AS. Restaureerimisprojekti arhitektuurse osa autor Marie Hammer, sisearhitekt Tiiu Lõhmus

  1. Kutsega raamatukoguhoidjate read täienevad : kokkuvõte kutse taotlemisest 2016. a / Krista Talvi

    Index Scriptorium Estoniae

    Talvi, Krista, 1948-

    2016-01-01

    Raamatukoguhoidja kutsestandardi tase 8 omistati Tiiu Reimole, kes on töötanud raamatukogus ja olnud õppejõud ning töötab praegu Tallinna Ülikooli Akadeemilises Raamatukogus Eesti retrospektiivse rahvusbibliograafia keskuses

  2. Stockholmi Saarlaste Ühingu küünlapäev / Ilari Meerits ; fotod: Mai-Liis Teär

    Index Scriptorium Estoniae

    Meerits, Ilari

    2007-01-01

    27. jaanuaril Stockholmi Eesti Majas Mai-Liis ja Jaan Teäre juhtimisel, sellel aastal oli külaliseks Tiiu Valmet, muusikaliste vahepaladega esinesid Charlotte, Carolina, Cecilia, Cassandra ja Alexander

  3. Preparation and characterization of poly (methyl methacrylate) and sulfonated poly (ether ether ketone) blend ultrafiltration membranes for protein separation applications

    International Nuclear Information System (INIS)

    Arthanareeswaran, G.; Thanikaivelan, P.; Raajenthiren, M.

    2009-01-01

    Poly (methyl methacrylate) (PMMA) and poly (methyl methacrylate)/sulfonated poly (ether ether ketone) (SPEEK) blend membranes were prepared by phase inversion technique in various composition using N,N'-dimethylformamide as solvent. The prepared membranes were characterized in terms of pure water flux, water content, porosity and thermal stability. The addition of SPEEK to the casting solution resulted in membranes with high pure water flux, water content, porosity and slightly low thermal stability. The cross sectional views of the blend membranes under electron microscope confirm the porosity and water flux results. The effect of the addition of SPEEK into the PMMA matrix on the extent of bovine serum albumin (BSA) separation was studied. It was found that the permeate flux increased significantly while the rejection of BSA from aqueous solution reduced moderately during ultrafiltration (UF) process. The effect was attributed to the increase in porosity and charge of the membrane due to the addition of SPEEK into the PMMA blend solution

  4. Kogu elu tööliste keskel / Aarne Ruben

    Index Scriptorium Estoniae

    Ruben, Aarne, 1971-

    2003-01-01

    Portreefilm filmimees Semjon Shkolnikovist "Igaviku seisukohalt" : stsenarist Igor Ruus : režissöörid Igor Ruus ja Heli Speek : produtsent Igor Ruus : Estonia Film 2002. Lisatud andmed Igor Ruusi, Heli Speegi ja Aarne Rubeni kohta, lk. 114

  5. Lähiminevik Kinomajas

    Index Scriptorium Estoniae

    2003-01-01

    Homme näidatakse Kinomajas portreefilmi filmimees Semjon Shkolnikovist "Igaviku seisukohalt" : stsenarist Igor Ruus : režissöörid Igor Ruus ja Heli Speek : produtsent Igor Ruus : Estonia Film 2002

  6. Sulfonated Poly(Ether Ether Ketone)/Functionalized Carbon Nanotube Composite Membrane for Vanadium Redox Flow Battery Applications

    International Nuclear Information System (INIS)

    Jia, Chuankun; Cheng, Yuanhang; Ling, Xiao; Wei, Guanjie; Liu, Jianguo; Yan, Chuanwei

    2015-01-01

    A novel sulfonated poly(ether ether ketone) (SPEEK) membrane embedded with the short-carboxylic multi-walled carbon nanotube (we name it as SPEEK/SCCT membrane) for vanadium redox flow battery (VRB) has been prepared with low capacity loss, low cost and high energy efficiency. The mechanical strength, vanadium ions permeability and performance of the membrane in the VRB single cell were characterized. Results showed that the SPEEK/SCCT membrane possessed low permeability of vanadium ions, accompanied by higher mechanical strength than the Nafion 212 membrane. The VRB single cell with SPEEK/SCCT membrane showed 7% higher coulombic efficiency (CE), 6% higher energy efficiency (EE) but lower capacity loss in comparison with the one with Nafion 212. The good cell performance, low capacity loss and high vanadium ions barrier properties of the blend membrane is of significant interest for VRB applications

  7. Arigato Spordiklubi = Arigato Sports Club

    Index Scriptorium Estoniae

    2008-01-01

    Arigato Spordiklubi (Rannamõisa tee 3, Tallinn) sisekujundusest. Arhitektid: Kätlin Mänd ja Endrik Mänd. Sisearhitekt: Tiiu Truus (Stuudio Truus OÜ), kaasa töötasid: Kaari Salu ja Kristi Prinzmann. Tiiu Truusist, tema tähtsamad tööd. I-IV korruse plaan, värv. välisvaade, 13 sisevaadet, foto T. Truusist

  8. Proton exchange nanohybrid membranes with high phosphotungstic acid loading within metal-organic frameworks for PEMFC applications

    International Nuclear Information System (INIS)

    Zhang, Bei; Cao, Ying; Li, Zhen; Wu, Hong; Yin, Yongheng; Cao, Li; He, Xueyi; Jiang, Zhongyi

    2017-01-01

    A novel approach to in-situ synthesize and encapsulate phosphotungstic acid into the cavity of MIL-101(Cr) using Na 2 WO 4 ·2H 2 O and Na 2 HPO 4 as precursors is presented to increase the acid loading content (31.4 wt.%). The phosphotungstic acid-encapsulating MIL-101(Cr) (HPW@MIL101) is introduced in sulfonated poly(ether ether ketone) (SPEEK) to prepare SPEEK/HPW@MIL101 nanohybrid membranes for PEMFC applications. Due to the introduction of HPW@MIL101, proton-conducting nanochannels are constructed both in the cavity of MIL101 and at the interface between HPW@MIL101 and SPEEK. Meanwhile, due to the hygroscopicity of phosphotungstic acid, the membrane dehydration at elevated temperatures is alleviated. The proton conductivity at low relative humidity is remarkably enhanced. The nanohybrid membrane with 9 wt.% HPW@MIL101 exhibits proton conductivity of 272 mS cm −1 at 65 °C, 100% RH and 6.51 mS cm −1 at 60 °C, 40% RH, which are 45.5% and 7.25 times higher than those of pristine SPEEK membrane (187 mS cm −1 and 0.898 mS cm −1 ), respectively. The single H 2 /O 2 fuel cell with SPEEK/HPW@MIL-9 membrane acquires the power density of 383 mW cm −2 at 100% RH, which is 27.2% higher than that of pristine SPEEK membrane. The peak power density of SPEEK/HPW@MIL-9 membrane at 55% RH is 2.97 times higher than that of pristine SPEEK membrane (79 mW/cm 2 ).

  9. Highly stable ionic-covalent cross-linked sulfonated poly(ether ether ketone) for direct methanol fuel cells

    Science.gov (United States)

    Lei, Linfeng; Zhu, Xingye; Xu, Jianfeng; Qian, Huidong; Zou, Zhiqing; Yang, Hui

    2017-05-01

    A novel ionic cross-linked sulfonated poly(ether ether ketone) containing equal content of sulfonic acid and pendant tertiary amine groups (TA-SPEEK) has been initially synthesized for the application in direct methanol fuel cells (DMFCs). By adjusting the ratio of p-xylene dibromide to tertiary amine groups of TA-SPEEK, a series of ionic-covalent cross-linked membranes (C-SPEEK-x) with tunable degree of cross-linking are prepared. Compared with the pristine membrane, the ionic and ionic-covalent cross-linked proton exchange membranes (PEMs) exhibit reduced methanol permeability and improved mechanical properties, dimensional and oxidative stability. The proton conductivity and methanol selectivity of protonated TA-SPEEK and C-SPEEK-x at 25 °C is up to 0.109 S cm-1 and 3.88 × 105 S s cm-3, respectively, which are higher than that of Nafion 115. The DMFC incorporating C-SPEEK-25 exhibits a maximum power density as high as 35.3 mW cm-2 with 4 M MeOH at 25 °C (31.8 mW cm-2 for Nafion 115). Due to the highly oxidative stability of the membrane, no obvious performance degradation of the DMFC is observed after more than 400 h operation, indicating such cost-effective ionic-covalent cross-linked membranes have substantial potential as alternative PEMs for DMFC applications.

  10. Sulfonated Holey Graphene Oxide (SHGO) Filled Sulfonated Poly(ether ether ketone) Membrane: The Role of Holes in the SHGO in Improving Its Performance as Proton Exchange Membrane for Direct Methanol Fuel Cells.

    Science.gov (United States)

    Jiang, Zhong-Jie; Jiang, Zhongqing; Tian, Xiaoning; Luo, Lijuan; Liu, Meilin

    2017-06-14

    Sulfonated holey graphene oxides (SHGOs) have been synthesized by the etching of sulfonated graphene oxides with concentrated HNO 3 under the assistance of ultrasonication. These SHGOs could be used as fillers for the sulfonated aromatic poly(ether ether ketone) (SPEEK) membrane. The obtained SHGO-incorporated SPEEK membrane has a uniform and dense structure, exhibiting higher performance as proton exchange membranes (PEMs), for instance, higher proton conductivity, lower activation energy for proton conduction, and comparable methanol permeability, as compared to Nafion 112. The sulfonated graphitic structure of the SHGOs is believed to be one of the crucial factors resulting in the higher performance of the SPEEK/SHGO membrane, since it could increase the local density of the -SO 3 H groups in the membrane and induce a strong interfacial interaction between SHGO and the SPEEK matrix, which improve the proton conductivity and lower the swelling ratio of the membrane, respectively. Additionally, the proton conductivity of the membrane could be further enhanced by the presence of the holes in the graphitic planes of the SHGOs, since it provides an additional channel for transport of the protons. When used, direct methanol fuel cell with the SPEEK/SHGO membrane is found to exhibit much higher performance than that with Nafion 112, suggesting potential use of the SPEEK/SHGO membrane as the PEMs.

  11. Nõudeõigus ja hüvitatav kahju konkurentsieeskirjade rikkumise tagajärjel tekkivates kahjuhüvitamisnõuetes : [magistritöö] / Tiiu Iverson ; Tartu Ülikool, õigusteaduskond ; juhendaja: Katri Paas

    Index Scriptorium Estoniae

    Iverson, Tiiu

    2010-01-01

    Konkurentsieeskirjade rikkumise majanduslikest tagajärgedest potentsiaalselt kahju kannatanud isikute määratlejana, nõudeõigusest ja selle piiritlemisest, hüvitatava kahju määratlemisest ja piiritlemisest

  12. Teooria ja praktika areng disainiõppes, tegevused ja muutused valdkonnas = The dynamics of theory and practice in design learning: contexts, service and a discipline in evolution / Tiiu Vaikla Põldma

    Index Scriptorium Estoniae

    Vaikla Põldma, Tiiu

    2015-01-01

    Artiklis on käsitletud disainiõppes toimunud muutusi, mis on tingitud muutuvast rahvastiku koosseisust, tehnoloogia arengust ja elulaadi muutusest nii eetiliselt, poliitiliselt, esteetiliselt ning globaalselt. Teooria ja praktika integreerimine aitab luua uusi ja uuenduslikke ideid ja võimalusi ruumiliste lahenduste ja ruumi kasutamise osas, et võimaldada inimestele paremaid elamistingimusi tänapäeva keerulises ja pidevalt muutuvas maailmas

  13. Composite electrolytes composed of Cs-substituted phosphotungstic acid and sulfonated poly(ether-ether ketone) for fuel cell systems

    Energy Technology Data Exchange (ETDEWEB)

    Oh, Song-Yul, E-mail: ms089203@tutms.tut.ac.jp [Department of Materials Science, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi, Aichi 441-8580 (Japan); Yoshida, Toshihiro; Kawamura, Go [Department of Materials Science, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi, Aichi 441-8580 (Japan); Muto, Hiroyuki [Department of Materials Science and Engineering, Kurume National College of Technology, 1-1-1 Komorino, Kurume, Fukuoka 830-8555 (Japan); Sakai, Mototsugu [Department of Materials Science, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi, Aichi 441-8580 (Japan); Matsuda, Atsunori, E-mail: matsuda@tutms.tut.ac.jp [Department of Materials Science, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi, Aichi 441-8580 (Japan)

    2010-10-15

    Composite electrolytes composed of cesium hydrogen sulfate containing phosphotungstic acids (CsHSO{sub 4}-H{sub 3}PW{sub 12}O{sub 40}) and sulfonated poly(ether-ether ketone) (SPEEK) were prepared by casting the corresponding precursor for application in fuel cells. Partially Cs-substituted phosphotungstic acids (Cs{sub x}H{sub 3-x}PW{sub 12}O{sub 40}) were formed in the CsHSO{sub 4}-H{sub 3}PW{sub 12}O{sub 40} system by mechanochemical treatment. SPEEK was prepared from PEEK by sulfonation using concentrated sulfuric acid. Flexible composite electrolytes were obtained and their electrochemical properties were markedly improved with the addition of Cs{sub x}H{sub 3-x}PW{sub 12}O{sub 40}, into the SPEEK matrix. A maximum power density of 213 mW cm{sup -2} was obtained from the single cell test for 50H{sub 3}PW{sub 12}O{sub 40}-50CsHSO{sub 4} in SPEEK (1/5 by weight) composite electrolyte at 80 deg. C and at 80 RH%. Electrochemical properties and transmission electron microscopy (TEM) results suggest that three-dimensional cluster particles were formed and homogeneously distributed in the SPEEK matrix. The mechanochemically synthesized Cs{sub x}H{sub 3-x}PW{sub 12}O{sub 40} incorporated into the SPEEK matrix increased the number of protonate sites in the electrolyte. The composite electrolytes were successfully formed with Cs{sub x}H{sub 3-x}PW{sub 12}O{sub 40}, which consist of hydrogen bonding between surface of inorganic solid acids and not only -HSO{sub 4}{sup -} dissociated from CsHSO{sub 4} but also -SO{sub 3}H groups in the SPEEK.

  14. Anhydrous proton exchange membrane of sulfonated poly(ether ether ketone) enabled by polydopamine-modified silica nanoparticles

    International Nuclear Information System (INIS)

    Wang, Jingtao; Bai, Huijuan; Zhang, Haoqin; Zhao, Liping; Chen, Huiling; Li, Yifan

    2015-01-01

    Highlights: • The concept of acid/base pairs was employed to design anhydrous PEMs. • Polydopamine-modified silica particles were uniformly dispersed in SPEEK membrane. • The membranes displayed enhancement in both stability and anhydrous proton conductivity. - Abstract: Novel anhydrous proton exchange membrane is (PEM) facilely prepared by embedding dopamine-modified silica nanoparticles (DSiOis 2 ) into sulfonated poly (ether ether ketone) (SPEEK) polymer matrix. DSiO 2 bearing -NH 2 /-NH- groups are synthesized inspired by the bioadhesion principle, which are uniformly dispersed within SPEEK membrane due to the good interfacial compatibility. The interfacial electrostatic attractions render unique rearrangement of the nanophase-separated structure and the chain packing of the resultant hybrid membranes. As a result, the thermal and mechanical stabilities as well as structural stability of the hybrid membranes are enhanced when compared to SPEEK control membrane. On the other hand, induced by the attractions, acid–base pairs are formed at the SPEEK/DSiOarewere 2 interface, where fast proton transfer via Grotthuss mechanism is expected. These features confer much higher proton conductivities on the DSiO 2 -filled membranes under both hydrated and anhydrous conditions, compared to those of the SPEEK control membrane and SiO 2 -filled membranes. Particularly, the hybrid membrane with 15 wt% DSiO 2 achieve the highest conductivities of 4.52achieveachieved × 10 −3 S cm −1 at 120 °C under anhydrous condition, which is much higher than the SPEEK control membrane and the commercial Nafion membrane (0.1iswas × 10 −3 S cm −1 ). The membrane with 9 wt% DSiO 2 show an open cell potential of 0.98showshowed V and an optimum power density of 111.7 mW cm −2 , indicative of its potential application in fuel cell under anhydrous condition

  15. Graphene/activated carbon supercapacitors with sulfonated-polyetheretherketone as solid-state electrolyte and multifunctional binder

    Science.gov (United States)

    Chen, Y.-R.; Chiu, K.-F.; Lin, H. C.; Chen, C.-L.; Hsieh, C. Y.; Tsai, C. B.; Chu, B. T. T.

    2014-11-01

    Sulfonated polyetheretherketone (SPEEK) has been synthesised by sulphonation process and used as the solid-state electrolyte, binder and surfactant for supercapacitors. Reduced graphene dispersed by SPEEK is used as a high-efficiency conducting additive in solid-state supercapacitors. It is found that SPEEK can improve the stability of the reduced graphene dispersion significantly, and therefore, the solid-state supercapacitors show a large decrease in IR drop and charge-transfer resistance (Rct), resulting in a higher rate capability. The solid-state supercapacitors with the activated carbon/reduced graphene/SPEEK/electrode can be operated from 1 to 8 A/g and exhibit capacity retention of 93%. The noteworthy is more than twice higher value for capacity retention by comparison with the solid-state supercapacitors using activated carbon/reduced graphene/PVDF electrode (capacity retention is 36%). The cell of reduced graphene with SPEEK can be cycled over 5000 times at 5 A/g with no capacitance fading.

  16. Enhanced response of microbial fuel cell using sulfonated poly ether ether ketone membrane as a biochemical oxygen demand sensor

    Energy Technology Data Exchange (ETDEWEB)

    Ayyaru, Sivasankaran; Dharmalingam, Sangeetha, E-mail: sangeetha@annauniv.edu

    2014-03-01

    Graphical abstract: - Highlights: • Sulfonated poly ether ether ketone (SPEEK) membrane in SCMFC used to determine the BOD. • The biosensor produces a good linear relationship with the BOD concentration up to 650 ppm. • This sensing range was 62.5% higher than that of Nafion{sup ®}. • SPEEK exhibited one order lesser oxygen permeability than Nafion{sup ®}. • Nafion{sup ®} shows high anodic internal resistance (67 Ω) than the SPEEK (39 Ω). - Abstract: The present study is focused on the development of single chamber microbial fuel cell (SCMFC) using sulfonated poly ether ether ketone (SPEEK) membrane to determine the biochemical oxygen demand (BOD) matter present in artificial wastewater (AW). The biosensor produces a good linear relationship with the BOD concentration up to 650 ppm when using artificial wastewater. This sensing range was 62.5% higher than that of Nafion{sup ®}. The most serious problem in using MFC as a BOD sensor is the oxygen diffusion into the anode compartment, which consumes electrons in the anode compartment, thereby reducing the coulomb yield and reducing the electrical signal from the MFC. SPEEK exhibited one order lesser oxygen permeability than Nafion{sup ®}, resulting in low internal resistance and substrate loss, thus improving the sensing range of BOD. The system was further improved by making a double membrane electrode assembly (MEA) with an increased electrode surface area which provide high surface area for electrically active bacteria.

  17. Nanocomposite Based on Functionalized Gold Nanoparticles and Sulfonated Poly(ether ether ketone Membranes: Synthesis and Characterization

    Directory of Open Access Journals (Sweden)

    Iole Venditti

    2017-03-01

    Full Text Available Gold nanoparticles, capped by 3-mercapto propane sulfonate (Au-3MPS, were synthesized inside a swollen sulfonated poly(ether ether ketone membrane (sPEEK. The formation of the Au-3MPS nanoparticles in the swollen sPEEK membrane was observed by spectroscopic and microscopic techniques. The nanocomposite containing the gold nanoparticles grown in the sPEEK membrane, showed the plasmon resonance λmax at about 520 nm, which remained stable over a testing period of three months. The size distribution of the nanoparticles was assessed, and the sPEEK membrane roughness, both before and after the synthesis of nanoparticles, was studied by AFM. The XPS measurements confirm Au-3MPS formation in the sPEEK membrane. Moreover, AFM experiments recorded in fluid allowed the production of images of the Au-3MPS@sPEEK composite in water at different pH levels, achieving a better understanding of the membrane behavior in a water environment; the dynamic hydration process of the Au-3MPS@sPEEK membrane was investigated. These preliminary results suggest that the newly developed nanocomposite membranes could be promising materials for fuel cell applications.

  18. Sulfonated poly(ether ether ketone) membranes for electric double layer capacitors

    International Nuclear Information System (INIS)

    Kim, Wan Ju; Kim, Dong-Won

    2008-01-01

    Sulfonated poly(ether ether ketone) (S-PEEK) with different degree of sulfonation (DS) has been prepared and evaluated as a proton conducting membrane for electric double layer capacitor (EDLC). The polymer electrolytes prepared with S-PEEK membrane exhibited ionic conductivities about 1.2 x 10 -3 -4.5 x 10 -3 S cm -1 at room temperature, which depended on both soaking solvent and degree of sulfonation. The quasi-solid-state EDLCs consisted of activated carbon electrodes and S-PEEK membrane were assembled, and their electrochemical characteristics were studied by cyclic voltammetry and charge-discharge cycle tests. The effect of DS on the electrochemical performances of EDLCs has been investigated

  19. Proton-conducting membranes based on benzimidazole-containing sulfonated poly(ether ether ketone) compared with their carboxyl acid form

    Energy Technology Data Exchange (ETDEWEB)

    Li, Hongtao; Wu, Jing; Zhao, Chengji; Zhang, Gang; Zhang, Yang; Shao, Ke; Xu, Dan; Lin, Haidan; Han, Miaomiao; Na, Hui [Alan G MacDiarmid Institute, College of Chemistry, Jilin University, Changchun 130012 (China)

    2009-10-15

    A series of sulfonated poly(ether ether ketone) containing pendant carboxyl (C-SPEEKs) have been synthesized using a nucleophilic polycondesation reaction. A condensation reaction between 1,2-diaminobenzene and carboxyl resulted in a new series of copolymers containing benzimidazole groups (SPEEK-BIms). The expected structures of the sulfonated copolymers are confirmed by {sup 1}H NMR. The dependence of ion exchange capacity, water uptake, proton conductivity and methanol diffusion coefficient of SPEEK-BIm membranes has been studied and compared with their carboxyl acid form. The results suggest that the introduction of benzimidazole groups may be responsible for many excellent properties of the membranes for fuel cell. It is noticeable that the markedly improved oxidative stability is benefit for the application of membrane. (author)

  20. Proton conductivity and fuel cell property of composite electrolyte consisting of Cs-substituted heteropoly acids and sulfonated poly(ether-ether ketone)

    Energy Technology Data Exchange (ETDEWEB)

    Oh, S.Y.; Yoshida, T.; Kawamura, G.; Sakai, M.; Matsuda, A. [Department of Materials Science, Toyohashi University of Technology, 1-1 Hibarigaoka, Tempaku-cho, Toyohashi, Aichi 441-8580 (Japan); Muto, H. [Department of Materials Science and Engineering, Kurume National College of Technology, 1-1-1 Komorino, Kurume, Fukuoka 830-8555 (Japan)

    2010-09-15

    Inorganic-organic composite electrolytes were fabricated from partially Cs{sup +}-substituted heteropoly acids (Cs-HPAs) and sulfonated poly(ether-ether ketone) (SPEEK) for application in fuel cells. Heteropoly acids, such as phosphotungstic acid (H{sub 3}PW{sub 12}O{sub 40}:WPA), and silicotungstic acid (H{sub 4}SiW{sub 12}O{sub 40}:WSiA), were mechanochemically treated with cesium hydrogen sulfate (CsHSO{sub 4}) to obtain the form of Cs-HPAs. SPEEK was prepared from PEEK by sulfonation using concentrated sulfuric acid. Water durability and surface structure of HPAs were modified by introducing Cs{sup +} into HPAs. Flexible and hot water stable composite electrolytes were obtained, and their electrochemical properties were markedly improved with the addition of Cs-HPAs into the SPEEK matrix. Maximum power densities of 245 and 247 mW cm{sup -2} were obtained for 50WPA.50CsHSO{sub 4} and 50WSiA.50CsHSO{sub 4} in SPEEK (1/5 by weight) composite electrolytes, respectively, from single cell tests at 80 C and 80 RH%. These results suggest that a three-dimensional proton-conductive path was formed among homogeneously distributed Cs-HPAs particles in the SPEEK matrix. The Cs-HPAs incorporated into the SPEEK matrix increased the number of protonate sites in the electrolyte. These observations imply that the mechanochemically synthesized Cs-HPAs, which consist of hydrogen bondings between Cs-HPAs and -HSO{sub 4}{sup -}, dissociated from CsHSO{sub 4}, are promising materials as inorganic fillers in inorganic-organic composite. (author)

  1. Mass transport of direct methanol fuel cell species in sulfonated poly(ether ether ketone) membranes

    International Nuclear Information System (INIS)

    Silva, V.S.; Ruffmann, B.; Vetter, S.; Boaventura, M.; Mendes, A.M.; Madeira, L.M.; Nunes, S.P.

    2006-01-01

    Homogeneous membranes based on sulfonated poly(ether ether ketone) (sPEEK) with different sulfonation degrees (SD) were prepared and characterized. In order to perform a critical analysis of the SD effect on the polymer barrier and mass transport properties towards direct methanol fuel cell species, proton conductivity, water/methanol pervaporation and nitrogen/oxygen/carbon dioxide pressure rise method experiments are proposed. This procedure allows the evaluation of the individual permeability coefficients in hydrated sPEEK membranes with different sulfonation degrees. Nafion[reg] 112 was used as reference material. DMFC tests were also performed at 50 deg. C. It was observed that the proton conductivity and the permeability towards water, methanol, oxygen and carbon dioxide increase with the sPEEK sulfonation degree. In contrast, the SD seems to not affect the nitrogen permeability coefficient. In terms of selectivity, it was observed that the carbon dioxide/oxygen selectivity increases with the sPEEK SD. In contrast, the nitrogen/oxygen selectivity decreases. In terms of barrier properties for preventing the DMFC reactants loss, the polymer electrolyte membrane based on the sulfonated poly(ether ether ketone) with SD lower or equal to 71%, although having slightly lower proton conductivity, presented much better characteristics for fuel cell applications compared with the well known Nafion[reg] 112. In terms of the DMFC tests of the studied membranes at low temperature, the sPEEK membrane with SD = 71% showed to have similar performance, or even better, as that of Nafion[reg] 112. However, the highest DMFC overall efficiency was achieved using sPEEK membrane with SD = 52%

  2. Sulfonated PEEK and fluorinated polymer based blends for fuel cell applications: Investigation of the effect of type and molecular weight of the fluorinated polymers on the membrane's properties

    Energy Technology Data Exchange (ETDEWEB)

    Inan, Tuelay Y.; Dogan, Hacer; Unveren, Elif E. [The Scientific and Technological Research Council of Turkey (TUBITAK), Marmara Research Center, Chemistry Institute, 41470 Gebze, Kocaeli (Turkey); Eker, Ersoy [Tuerk Demirdoekuem Fabrikalari A.S., 11300 Bozueyuek, Bilecik (Turkey)

    2010-11-15

    This work clearly demonstrates the effect of the type and molecular weight of the fluorinated polymer of SPEEK/Fluorinated polymer blends for low temperature (<80 C) Fuel Cell Applications. Comparisons with trademarks (e.g., Nafion {sup registered}) suggests that the membranes we have prepared in this study have good compatibility in all application respects. Membranes were prepared by solution casting method from four different fluorinated polymers; poly (vinylidene fluoride) with three different molecular weights (PVDF, M{sub w}: 180.000, M{sub w}: 275.000, M{sub w}: 530.000); Poli(vinylidene fluoride-co-Hexafluoro propylen) (PVDF-HFP M{sub n}:130.000) and sulfonated poly(ether ether ketone) (SPEEK) with sulfonation degree (SD) of 70. The sulfonation degree (SD) of SPEEK was determined by FTIR, {sup 1}H NMR and ion exchange capacity (IEC) measurements. Thermo-oxidative stability and proton conductivity of the membranes were determined by using thermal gravimetric analysis (TGA) and BT-512 BekkTech membrane test systems, respectively. Chemical degradation of SPEEK membranes was investigated via Fenton test. The morphology of the membranes were examined by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Water uptake and proton conductivity values decreased with the addition of fluorinated polymers (PVDF, PVDF-HFP) as expected, but proton conductivity values were still comparable to that of Nafion 117 {sup registered} membrane. Addition of fluorinated polymers improved chemical degradation of the blend membranes in all ratios while addition of PVDF-HFP to the SPEEK70 caused phase separations in all ratios. Methanol permeability value of SPEEK70/PVDF(M{sub w} = 275.000) blend membrane (3.13E-07 (cm{sup 2}/s)) was much lower than Nafion 117 {sup registered} (1.21E-06 (cm{sup 2}/s)). PVDF addition to the SPEEK polymers caused increase in elongation of the membranes. Increase in the molecular weight of the PVDF did not show any effect on

  3. Polymers and composites synthesis and characterization for application on PEM type fuel cells; Sintese e caracterizacao de polimeros e compositos para aplicacao em celulas a combustivel do tipo PEM

    Energy Technology Data Exchange (ETDEWEB)

    Fiuza, Raigenis da Paz; Souza, Daniele Ribeiro; Barreto, Ednardo Gomes; Boaventura Filho, Jaime Soares; Jose, Nadia Mamede [Universidade Federal da Bahia (UFBA), Salvador, BA (Brazil)]. E-mail: raigenis@gmail.com

    2006-07-01

    The PEM (proton exchanging membrane) type fuel cell presents good potential for the energy production without the residue generation. However, its manufacture presents high costs for commercial application, mainly due to the electrolyte. Sulfonated Peek (polish-ether-ether-ketone) supported or auto immobilized the in a silicone matrix is an interesting alternative as electrolyte for PEM fuel cells. The commercial PEEK in powder form was functionalized with sulfuric acid, giving the SPEEK (Sulfonated PEEK). The membranes were produced by hot pressing the SPEEK immobilized in a silicone matrix produced by the sol-gel process. The membranes obtained were characterized by DRX, FTIR, TGA, MEV, DSC and protonic conductivity measurements. (author)

  4. Inimeseksolemise võtmed / Aita Kivi

    Index Scriptorium Estoniae

    Kivi, Aita, 1954-

    2000-01-01

    Sisu : Viiu Härm. Duubel kaks; Kurt Vonnegut. Titaani sireenid; Berendt, John. Südaöö hea ja kurja tundmise aias; Fern Michaels. Pühad; Erich Segal. Arstid; Maria Riva. Marlene Dietrich; Tiiu Põld. Märgitud mees

  5. Suur rahvusvaheline välisbalti arhiivide konverents südasuvises Tartus / Mai Raud-Pähn ; fotod Madis Laas

    Index Scriptorium Estoniae

    Raud-Pähn, Mai, 1920-

    2006-01-01

    Ettekannetega esinesid: Tiiu Kravtsev, Riina Reinvelt, Juta Kivimäe, Piret Noorhani, Merike Kiipus, Anu Korb, Anne Valmas, Mihkel Volt, Mare Rand, Inga Kuljus, Enn Mainla, Roland Weiler, Teas Tanner, Tiina Kirss, Jüri Kivimäe, Enda-Mai Michelson-Holland, Andrae, Carl Göran, Katrin Meerits ja Maie Barrow

  6. Parimad ruumid ja asjad : ESL aastapreemiad 2002 / Tarmo Piirmets

    Index Scriptorium Estoniae

    Piirmets, Tarmo

    2003-01-01

    Publitsistikapreemia - Jüri Kermiku monograafia "A. M. Luther 1877-1940", parim ajalooline interjöör - presidendi kantselei, sisearh. Juta Lember, parim kaasaegne interjöör - mööblifirma "Neiser" kontor, sisearh. Tiiu Truus, esemepreemia - mööbliseeria "FlixFlax", disainer Ivari Männi

  7. Hüpates üle varju ehk Eesti millenniuminäitused / Henno Väri

    Index Scriptorium Estoniae

    Väri, Henno

    1999-01-01

    Ülevaatenäitused 'XX sajandi eesti kunstniku mälestuseks' (kuraator Eha Komissarov, üldkujundaja Jaan Toomik) Eesti Kunstimuuseumi Rüütelkonna hoones ja 'Hingeaeg 1900-2000' (kuraatorid Tiiu Talvistu, Mare Joonsalu) Tartu Kunstimuuseumi Kivisilla Pildigaleriis.

  8. Lennujaama kontor nüüd nõukogudeaegses terminalis / Kai Ilustrumm

    Index Scriptorium Estoniae

    Ilustrumm, Kai

    2004-01-01

    Tallinna Lennujaama hoone rekonstrueerimine läks maksma üle 20 milj. Eesti krooni. Kolmandiku hoonest hõlmavad kontoriruumid, ülejäänud osa saab kasutada mitmesuguste ürituste teenindamiseks. Renoveerimisplaani kavandasid Andres ja Reet Põime, sisekujunduse Tiiu Raudsepp-Truus

  9. Filmipäevad lõpetas "Magnus" / Kristiina Davidjants

    Index Scriptorium Estoniae

    Davidjants, Kristiina, 1974-

    2008-01-01

    Eesti filmipäevadel Kinomajas autasustas Eesti Kinoliit aastapreemiaga Sulev Keeduse dokumentaalfilmi "Jonathan Austraaliast" ja noorte- ja tudengifilmi auhinna sai Vanalinna hariduskolleegiumi teatriklassi noorte film "Pablo ja Tiiu". Näidati ka kohtutõkendi alust Kadri Kõusaare filmi "Magnus"

  10. Tartlased andsid oma panuse elamise kunsti / Krista Piirimäe

    Index Scriptorium Estoniae

    Piirimäe, Krista, 1946-

    2007-01-01

    Eesti Kunstnike Liidu aastanäitusest "Elamise kunst" Tallinna Kunstihoones. Pikemalt Ilmar Kruusamäe, Markus Kasemaa, Saskia Kasemaa, Andrus Kasemaa, Silver Vahtre, Anne Parmasto, Meiu Mündi, Tiiu Kirsipuu näitusel eksponeeritud töödest

  11. Eestis võltsitakse kunsti / Pekka Erelt

    Index Scriptorium Estoniae

    Erelt, Pekka, 1965-

    2000-01-01

    25. X 1999 kunstiagentuuri Haus oksjonil Anne Luigele müüdud Elmar Kitse õlimaal "Tants" on tõenäoliselt võltsing. Maie Raitari, Mai Levini, Tiiu Talvistu, Saskia Kasemaa, Jüri Kuuskemaa, Silvia Jõgeveri, Valve Janovi arvamused. Maali värvide keemilise analüüsi teeb EKMi restauraator Alar Nurkse.

  12. Millele pöörate eluaseme ostmisel ja üürimisel tähelepanu?

    Index Scriptorium Estoniae

    2005-01-01

    Küsimusele vastavad Brüsselis tööd otsiv Kadri Kuusk, Sampo Panga koolitusosakonna juhataja Külli Meier, finantsinspektsiooni osakonnajuhataja Andre Nõmm, Riigikogu liige Meelis Atonen, Palivere lastekodu juhataja Külle Saar, Helsingis töötav arst Jaak Kiviloog, Narva kooliõpetaja Julia Ivanova, maksu- ja tolliameti peaspetsialist Tiiu Kilk

  13. Kas teha konteinerklass? / Raivo Juurak

    Index Scriptorium Estoniae

    Juurak, Raivo, 1949-

    2011-01-01

    Koolikorraldusest ja koolidesse vastuvõtust Soomes, Saksamaal ja Inglismaal. Arvamusi avaldavad Soomes õpetajana töötavad Tiiu Jürisson ja Arvi Nikkarev, pikaajalise Soomes töötamise kogemusega TLÜ lektor Anu Carlsson ning Saksamaal Hessenis õpetajana töötav Kadri Heller

  14. Kadriorus voolivad mitme maa skulptorid jääst kujusid / Tatjana Bratoljubova

    Index Scriptorium Estoniae

    Bratoljubova, Tatjana

    2008-01-01

    Kadrioru pargi 290. sünnipäeva puhul loovad kunstnikud Tallinnas Luigetiigi ääres jääskulptuure. Taieseid teostavad Kate Robinson Shotimaalt, Natalia Tshistjakova ja Jevgeni Zavjalov Peterburist ning Tiiu Kirsipuu, Ekke Väli ja Kalle Pruuden Eestist

  15. Kirjakunstinäitus rändab

    Index Scriptorium Estoniae

    2004-01-01

    Viljandi kirjakunstiklubi Mary seitsme aasta tööde rändnäitus alustas Jakobsoni koolis. Klubi juhataja Mary Mauring. Väljapanekut kujundasid Kadri Papagoi, Kairi Ritson, Tiiu Väli, Aita Leemet ja Ants Tõnisalu, kes on ka paljude tööde autorid

  16. Ökokunst Viljandi "Kiriküüdil" / Johannes Saar

    Index Scriptorium Estoniae

    Saar, Johannes, 1965-

    2002-01-01

    Lõppes seitsmes ökoteemaline "Kiriküüt". Ürituse organiseerijate eesotsas on pikemalt olnud Tiiu Männiste ja Mari Sobolev. Jakobsoni kuju juures kandsid kirikuõpetaja Mart Salumäe ja "Ugala" direktor Jaak Allik ette rühmituse VSN performance'i "Mulgi näide". Ökoloogiast

  17. Raamat väikerahvaste terminoloogiast / Tiina Leemets

    Index Scriptorium Estoniae

    Leemets, Tiina

    1994-01-01

    Rahvusvahelise terminoloogiainstituudi IITF-i väljaande "Terminology Science and Research" väikekeelte terminoloogia olukorrale pühendatud erinumbrist (nr. 2/1991), kus käsitletakse eesti (Tiiu Erelt, Henn Saari), läti, leedu, ukraina, lapi, islandi, mänksi, iiri, katalaani ja baski oskuskeelt

  18. Narva Joaoru puhkeala ja rannahoone = Narva Joaoru Recreational Area and Beach House / Kalle Vellevoog

    Index Scriptorium Estoniae

    Vellevoog, Kalle, 1963-

    2016-01-01

    Narva Joaoru puhkeala ja rannahoone. Arhitektid Kalle Vellevoog, Martin Prommik, Andrus Andrejev (Arhitektuuribüroo JVR), Tiiu Truus (Stuudio Truus). Konstruktsioon Ahti Lääne, Jürgen Einpaul (inseneribüroo EstKonsult). Eesti Arhitekide Liidu aastapreemia nominent 2016

  19. Hea õpetamise grandi saajad

    Index Scriptorium Estoniae

    2016-01-01

    Õpetamise uurimist alustavad grandi toel Andrus Org, Riina Oruaas, Natalja Zagura (humanitaar- ja kunstide valdkond), Stefano Braghiroli, Aet Kiisla, Tiiu Taur (sotsiaalteadused), Marje Oona, Oivi Uibo, Daisy Volmer (meditsiinitead.), Svetlana Ganina, Natalja Lepik ja Raivo Raid (loodus- ja täppistead.)

  20. Näitused Sagadis ja Palmses

    Index Scriptorium Estoniae

    2003-01-01

    Sagadis eksponeeritakse hollandi poeedi, esseisti ja fotograafi Rommert Boonstra fotonäitust "Flowering inferno" ja maalikunstnik Tiiu Ahmani meremaale. Palmse mõisas Valli Lember-Bogatkina akvarellide näitus. Karepal Sagritsa muuseumis saab vaadata V. Lember-Bogatkina 1985. a. Kuuba reisi muljeid

  1. Wõro keskus = Wõro Centre / Ilmar Jalas

    Index Scriptorium Estoniae

    Jalas, Ilmar, 1954-

    2001-01-01

    Võrus Jüri t. 22a asuva ärihoone projekteeris Arhitektuuribüroo JVR. Arhitekt Ilmar Jalas, kaasa töötas Andrus Andrejev. Konstruktsioonid: Jaan Port, eriosad: Tiiu Välba. Projekt 2000-2001, hoone valmis 2001. 7 ill.: asendiplaan, korruste plaanid, välisvaated

  2. Tallinna Lennujaama vana terminali renoveerimine = Renovation of Tallinn Airport's old terminal / Epp Lankots

    Index Scriptorium Estoniae

    Lankots, Epp, 1976-

    2005-01-01

    Arhitektid: Andres Põime, Reet Põime, Tiiu Truus. Tallinna Lennujaama reisijateterminali projekteerisid 1939. a. arhitektid Roman Koolmar ja Artur Jürvetson, hoone valmis Paula Koido rekonstrueerimisprojekti järgi. Ill.: 2 värv. sisevaadet, välisvaade

  3. Koolid saavad tagasi algusaegade väärikuse / Mari Rebane

    Index Scriptorium Estoniae

    Rebane, Mari

    2003-01-01

    Artur Perna projekteeritud Tallinna 21. keskkooli hoone renoveerimisprojekti autor on Raul Järg, sisekujundaja Toomas Korb, lühtrite disainer Tõnis Vellama. Edgar Johan Kuusiku projekteeritud Lenderi tütarlastegümnaasiumi (Tallinna kesklinna vene gümnaasium) renoveerimisprojekti autor on Andres Põime, sisekujundaja Tiiu Truus

  4. Mitte uhke, vaid omanäoline ja hubane / Ell-Maaja Randküla

    Index Scriptorium Estoniae

    Randküla, Ell-Maaja, 1939-2016

    2005-01-01

    Tallinnas Aaviku elurajoonis asuva eramu sisekujundus. Sisearhitekt Tiiu Truus, AB Studio 3. Ehitaja: KMG Ehitus. Põrandad on betoonist, viimistlusmaterjalideks vineer, plekk ja mööblilinoleum. T. Truus on kavandanud ka osa mööblist. T. Truusist, tema tähtsamad tööd. Ill.: 2 plaani, 9 värv. vaadet

  5. Täna õhtul kohtuvad Harju mäel tuli ja jää / Siiri Suutre

    Index Scriptorium Estoniae

    Suutre, Siiri

    2007-01-01

    Tallinna valgusfestivali raames toimub 10.02.2007 Harjumäel tule ja jää pidu. Korraldaja Indrek Leht. Tuleinstallatsiooni "Born to fly" autorid leedu kunstnikud Kestutis ja Vytautis Musteikis, jääskulpuuride autorid Tiiu Kirsipuu, Kalle Pruuden, Aime Kuulbusch ja Üllar Kallau

  6. Iga aastaga uus mälestuste tuba / Lii Sammler

    Index Scriptorium Estoniae

    Sammler, Lii, 1963-

    2008-01-01

    Sargvere Mõisa Ajalootoad registreeriti 2007. a. kevadel kui Sargvere Maakultuuri Edendamise Seltsi museum. Muuseumitube tutvustab giid Sale Talviste. Talutoa seina kaunistavad Andres Pleesi jäädvustatud Sargvere lood. 2006. a. ilmus S. Talviste koostatud raamat "Muistsete aegade lood Sargverest". Järvamaa muuseumi juhataja Tiiu Saaristi kommentaar

  7. Mentor riietab hinge lahti

    Index Scriptorium Estoniae

    2008-01-01

    Küsimusele, mida ootavad mentorid neilt, kellele nad toeks astuvad, vastavad Nelli Sudnitsõna, Jaan Allem, Anti Orav, Erkki Susi, Margus Rink, Aavo Kokk, Janeck Uibo. Lisa: Fontese mentoriprogramm - esimene omalaadne Eestis. Kommenteerivad Tiiu Allikvee ja Piret Jamnes. Vt samas: Mida arvavad asjast menteed? Kommenteerivad Kaidi Kuusmaa ja Gristel Tali

  8. Pühendumusuuringute tegemine pole levinud / Kai Vare

    Index Scriptorium Estoniae

    Vare, Kai, 1968-

    2004-01-01

    Reval Hotelligrupp AS-is ja Saku Õlletehases läbi viidud töötajate rahulolu-uuringutest. Kommenteerivad Mari-Liis Eensalu, Kai Prinits ja Tiiu Vilms. Vt. samas: Narva Elektrivõrkudes töötavad Euroopa pühendunuimad inimesed

  9. Suurejooneline minimalism Nõmmel / Maris Takk

    Index Scriptorium Estoniae

    Takk, Maris

    2006-01-01

    Tallinnas Nõmmel asuva eramu (arhitekt Emil Urbel) sisekujundus. Sisearhitekt Tiiu Truus. Enamus mööblist on T. Truusi kavandatud. T. Truusist, tema tähtsamad tööd. Ill.: värv. portreefoto T. Truusist, I ja II korruse plaan, 15 värv. vaadet

  10. Esimene Eesti maja Hiinas = The first Estonian house in China / Andres Põime, Lauri Vaimel ; interv. Triin Ojari

    Index Scriptorium Estoniae

    Põime, Andres

    2008-01-01

    Vestlus Pekingi Eesti saatkonna arhitektuurikonkursi võidutöö autoritega. Tulemused: I preemia - Andres Põime, Lauri Vaimel, II - Erik Nobel, Christian Jensen, Kristen Herup Sovang, Soren Andersson, Pille Kivihall, Dan Ljungar, Hans Willadsen (Taani), III - Kalle Vellevoog, Velle Kadalipp, Tiiu Truus, Martin Prommik

  11. Ed & Os : kahe Wilde näitemäng / Mati Unt

    Index Scriptorium Estoniae

    Unt, Mati, 1944-2005

    1998-01-01

    Mati Undi näidend Eduard Vilde ja Oscar Wilde'i kohtumisest. Illustratsiooniks Tiiu Kirsipuu Tartusse Wilde Irish Pubi ette loodava skulptuurigrupi kavand. Autori märkus : Tekst on kirjutatud Kahe Wilde Pubi avamiseks ja koostatud Wilde'i ja Vilde tekstidest.

  12. Kuldma, Aus, Roosma ja Siska

    Index Scriptorium Estoniae

    2007-01-01

    2006. aasta Kuldnõela võitja kuulutatakse välja Tallinnas Viru keskuses 9.03.2007. Kandidaadid Katrin Kuldma kollektsiooniga Chocolate, Reet Aus kaubamärgiga Re Use, Tiiu Roosma pesukollektsiooniga BonBon Lingerie ja Marika Siska kaubamärgiga Sangar

  13. Arhitektuuriaasta parimad / Piret Lindpere

    Index Scriptorium Estoniae

    Lindpere, Piret, 1963-

    2003-01-01

    EK arhitektuuri sihtkapitali aastapreemiad 2002: suur preemia: Eesti arhitektuuripoliitika töögrupp (13 nime), objektipreemia: Jüri Okas (Mardi talu), sisekujunduspreemia: Tiiu Truus (Neiseri kontor), restaureerimispreemia: Juta Lember (EV Presidendi kantselei esindusruumid), urbanistikapreemia: Villem Tomiste, tegevuspreemia: Jüri Kermik ("A. M. Luther 1877-1940"), Andres Kurg ja Mari Laanemets ("Tallinna juht")

  14. Kultuurkapitali arhitektuuri sihtkapitali aastapreemiad 2002 / Piret Lindpere

    Index Scriptorium Estoniae

    Lindpere, Piret, 1963-

    2002-01-01

    Aastapreemia: Eesti arhitektuuripoliitika töögrupp (13 nime), objektipreemia: Jüri Okas (Mardi talu), sisekujunduspreemia: Tiiu Truus (Neiseri kontor), restaureerimispreemia: Juta Lember (EV Presidendi Kantselei esindusruumid), urbanistikapreemia: Villem Tomiste, tegevuspreemia: Jüri Kermik ("A. M. Luther 1877-1940"), Andres Kurg ja Mari Laanemets ("Tallinna juht").

  15. Delta Plaza kohvik = The Delta Plaza Café / Margit Mutso

    Index Scriptorium Estoniae

    Mutso, Margit, 1966-

    2010-01-01

    Tallinnas Pärnu mnt. 141 asuva kohviku Delta Plaza sisekujundusest. Sisearhitektid Tiiu Truus ja Marja Viltrop (Stuudio Truus OÜ). Hoone arhitektid Jüri Okas ja Marika Lõoke (AB J. Okas & M. Lõoke). Žürii liikme Mait Summataveti arvamus kohvikust

  16. Taas teadmusühiskonna infopoliitikast / Silvi Metsar

    Index Scriptorium Estoniae

    Metsar, Silvi

    2004-01-01

    RRis toimunud II infopoliitika foorumil "Riiklik infopoliitika - müüt või tegelikkus" arutleti, kas Eestis on infoühiskond, milline on riiklik infopoliitika jne. Teiste seas osalesid Anu Toots, Tiiu Valm, Peeter Tulviste, Jaak Aaviksoo, Raul Malmstein

  17. Häbi, professor, teil on Gefilus kapis / Eve Kruuse

    Index Scriptorium Estoniae

    Kruuse, Eve,d1959-

    2008-01-01

    Tartu Ülikooli professor Marika Mikelsaar võitis läinud kuul koos kolleegidega (Tiiu Kullisaar, Epp Songisepp, Hedi Annuk ja Mihkel Zilmer) Soulis ülemaailmse naisleiutajate konkursil ME-3 bakteri avastamise ja probiootikuks arendamise eest kuldmedali

  18. Eestit esindab Venezia biennaalil 21. sajandi eramute kõrgmood / Tanel Veenre

    Index Scriptorium Estoniae

    Veenre, Tanel, 1977-

    2010-01-01

    27. augustil avatakse 12. Venezia arhitektuuribiennaalil "Inimesed kohtuvad arhitektuuris" (üldkuraator Kazuyo Sejima) Eesti väljapanek "100 maja / houses", mille komissar on Ülar Mark, kuraator Karen Jagodin, autorid Kalle Vellevoog, Tiiu Truus, Martin Pedanik ja Karen Jagodin. Lisaks 21. sajandi eramutele on ekspositsiooni lisatud valik ikoonilise tähendusega eramuid esimese Eesti Vabariigi ja nõukogude ajast

  19. Pettuse kunst / Olga Gretsiskina

    Index Scriptorium Estoniae

    Gretsiskina, Olga

    2001-01-01

    Kunstivõltsingutest Eestis (A. Vabbe, O. Maran, J. Köler, K. Mägi) ja mujal. Kunstigalerii Rios omanike Jelena ja Valeri Tsurkani tööst võltsingute avastamisel. Tiiu Talvistu ja anonüümse võltsingutega äritseja kommentaar

  20. Vanalinna Hariduskolleegiumi Gümnaasiumi õppehoone restaureerimine = Restoration of the academic building of the Old Town Educational College / Margit Mutso

    Index Scriptorium Estoniae

    Mutso, Margit, 1966-

    2009-01-01

    Tallinnas Vene 22 asuva hoone muinsuskaitse eritingimused koostas Aleksandr Pantelejev. Arhitekt Marie Hammer, sisearhitekt Tiiu Lõhmus (Vana Tallinn), arheoloog Villu Kadakas ja muinsuskaitselist järelevalvet teostanud Helve Ilves pälvisid restaureerimistöö eest arhitektuuri sihtkapitali aastapreemia 2008. Žürii hinnang

  1. Naismaalijate abstraktsioon ja empaatia / Reet Varblane

    Index Scriptorium Estoniae

    Varblane, Reet, 1952-

    2003-01-01

    Tartu Kunstimajas näitus "Abstraktsioon ja empaatia. Kristiina Kaasik, Lola Liivat, Helina Loid (sünd. 1982), Tiiu Pallo-Vaik, Mall Paris, Anne Parmasto, Mari Roosvalt, Sirje Runge, Tiina Tammetalu, Margi Vähi (sünd. 1975)". Kuraator ja väljapaneku kujundaja Reet Varblane

  2. Kujurid ei olegi nikerdajad / Aarne Mäe

    Index Scriptorium Estoniae

    Mäe, Aarne, 1967-

    1998-01-01

    Sümpoosioni 'Puu '98' (korraldaja Heiki Kongi) raames Sagadis toimunud puuskulptuuride valmistamisest, kus osalesid Aime Kuulbusch, Aili Vahtrapuu, Hille ja Lembit Palm, Urmas Rauba, Tiiu Kirsipuu, Steve Lester, ning mille tulemusi eksponeeritakse koos Valga- ja Pärnumaal valminutega Rocca al Mares

  3. Helsingi loomaaia jääskulptuuridest valiti parimad

    Index Scriptorium Estoniae

    2004-01-01

    Soomes Korgeasaaris lõppes jääskulptuurivõistlus. Võitjad. Esikohatöö autorid olid Steve Lester Ameerikast ja Ljudmila Lester Venemaalt. Eestist osalesid ühel võistlusel Lembit Palm ja Jaak Soans ning teisel võistlusel Tiiu Kirsipuu ja Aime Kuulbusch

  4. Modernismi nauding vaatamiseks : elamu Pärnus Seedri tänaval = Modernism as Eye Candy : Residence in Seedri St, Pärnu / Urmas Oja

    Index Scriptorium Estoniae

    Oja, Urmas, 1981-2012

    2007-01-01

    Külaliskortermaja Seedri 4 Pärnus. Arhitektuur: AB JVR. Autor Kalle Vellevoog, kaasautor Margus Tamm. Konstruktor Ahti Lääne (OÜ EstKONSULT). Sisekujundaja Tiiu Truus. Maastikuarhitekt Vaike Parker. Projekt: 2005, valmis: 2007. Ill.: IV korruse plaan, 5 värv. vaadet

  5. Elamu Viimsis = Dwelling in Viimsi / Triin Ojari

    Index Scriptorium Estoniae

    Ojari, Triin, 1974-

    2004-01-01

    Valge modernistlik eramu suure päikeseterrassiga ülakorrusel. Projekteerija: Arhitektuuribüroo JVR. Autor Kalle Vellevoog, sisekujundaja Tiiu Truus (Studio-3), konstruktor Jaan Port. Projekt 2002, valmis 2003. Üldpind 260 mø. Ill.: I ja II korruse plaan, 3 välis- ja 3 sisevaadet, värv

  6. Navodnenija v umah zactroishtshikov / Maris Kuuda

    Index Scriptorium Estoniae

    Kuuda, Maris

    2007-01-01

    Kohalikel omavalitsustel pole piisavalt hoobasid sundida arendajaid üleujutusohuga arvestama. Pärnusse hotelli September rajajad (arhitektid Emil Urbel, Andrus Mark) arvestavad ujutusohuga. Arvamust avaldavad Rene Reisner, Mari Sepp, Ülo Sults, Karri Tiigisoon, Indrek Rannik, Mark Soosaar, Tiiu Pärn, Merle Looring, Rita Sepp, Kaspar Alles

  7. Vabaduse väljakul vaadatakse irooniaga Ameerikale ja Eestile / Ants Juske

    Index Scriptorium Estoniae

    Juske, Ants, 1956-2016

    2009-01-01

    Maalikunstnik Valeri Vinogradovi Ameerikast inspireeritud isikunäitus "American Beauty" Tallinna Kunstihoone galeriis 13. detsembrini 2009. Maastiku maalimisel on kunstnik kasutanud Anne Parmasto abi. Tallinnas Vabaduse Galeriis 5. jaanuarini 2010 avatud Tiiu Kirsipuu isikunäitus "Rollimäng", mis mängib näitlejate Tõnu Aava ja Andres Dvinjaninovi rollidega

  8. Electrochemical investigation of sulfonated poly(ether ether ketone)/clay nanocomposite membranes for moderate temperature fuel cell applications

    Energy Technology Data Exchange (ETDEWEB)

    Hasani-Sadrabadi, Mohammad Mahdi [Polymer Engineering Department, Amirkabir University of Technology, Tehran (Iran); Biomedical Engineering Department, Amirkabir University of Technology, Tehran (Iran); Dashtimoghadam, Erfan; Sarikhani, Kaveh [Polymer Engineering Department, Amirkabir University of Technology, Tehran (Iran); Majedi, Fatemeh S. [Biomedical Engineering Department, Amirkabir University of Technology, Tehran (Iran); Khanbabaei, Ghader [Polymer Science and Technology Division, Research Institute of Petroleum Industry, Tehran (Iran)

    2010-05-01

    In the present study, polyelectrolyte membranes based on partially sulfonated poly(ether ether ketone) (sPEEK) with various degrees of sulfonation are prepared. The optimum degree of sulfonation is determined according to the transport properties and hydrolytic stability of the membranes. Subsequently, various amounts of the organically modified montmorillonite (MMT) are introduced into the sPEEK matrices via the solution intercalation technique. The proton conductivity and methanol permeability measurements of the fabricated composite membranes reveal a high proton to methanol selectivity, even at elevated temperatures. Membrane based on sPEEK and 1 wt% of MMT, as the optimum nanoclay composition, exhibits a high selectivity and power density at the concentrated methanol feed. Moreover, it is found that the optimum nanocomposite membrane not only provides higher performance compared to the neat sPEEK and Nafion {sup registered} 117 membranes, but also exhibits a high open circuit voltage (OCV) at the elevated methanol concentration. Owing to the high proton conductivity, reduced methanol permeability, high power density, convenient processability and low cost, sPEEK/MMT nanocomposite membranes could be considered as the alternative membranes for moderate temperature direct methanol fuel cell applications. (author)

  9. A novel sulfonated poly(ether ether ketone) and cross-linked membranes for fuel cells

    Energy Technology Data Exchange (ETDEWEB)

    Li, Hongtao; Zhang, Gang; Wu, Jing; Zhao, Chengji; Zhang, Yang; Shao, Ke; Han, Miaomiao; Lin, Haidan; Zhu, Jing; Na, Hui [Alan G MacDiarmid Institute, College of Chemistry, Jilin University, Qianjin Street 2699, Changchun 130012, Jilin (China)

    2010-10-01

    A novel poly(ether ether ketone) (PEEK) containing pendant carboxyl groups has been synthesized by a nucleophilic polycondensation reaction. Sulfonated polymers (SPEEKs) with different ion exchange capacity are then obtained by post-sulfonation process. The structures of PEEK and SPEEKs are characterized by both FT-IR and {sup 1}H NMR. The properties of SPEEKs as candidates for proton exchange membranes are studied. The cross-linking reaction is performed at 140 C using poly(vinyl alcohol) (PVA) as the cross-linker. In comparison with the non-cross-linked membranes, some properties of the cross-linked membranes are significantly improved, such as water uptake, methanol resistance, mechanical and oxidative stabilities, while the proton conductivity decreases. The effect of PVA content on proton conductivity, water uptake, swelling ratio, and methanol permeability is also investigated. Among all the membranes, SPEEK-C-8 shows the highest selectivity of 50.5 x 10{sup 4} S s cm{sup -3}, which indicates that it is a suitable candidate for applications in direct methanol fuel cells. (author)

  10. Sulfonated carbon black-based composite membranes for fuel cell

    Indian Academy of Sciences (India)

    Composite membranes were then prepared using S–C as fillers and sulfonated poly(ether ether ketone) (SPEEK) as polymer matrix with three different sulfonation degrees (DS = 60, 70 and 82%). Structure and properties of the composite membranes were characterized by FTIR, TGA, scanning electron microscopy, proton ...

  11. Novel sulfonated poly (ether ether keton)/polyetherimide acid-base blend membranes for vanadium redox flow battery applications

    International Nuclear Information System (INIS)

    Liu, Shuai; Wang, Lihua; Ding, Yue; Liu, Biqian; Han, Xutong; Song, Yanlin

    2014-01-01

    Highlights: • SPEEK/PEI acid-base blend membranes are prepared for VRB applications. • The acid-base blend membranes have much lower vanadium ion permeability. • The energy efficiency of SPEEK/PEI maintain around 86.9% after 50 cycles. - Abstract: Novel acid-base blend membranes composed of sulfonated poly (ether ether ketone) (SPEEK) and polyetherimide (PEI) were prepared for vanadium redox flow battery (VRB). The blend membranes were characterized by Fourier transform infrared spectroscopy (FT-IR) and scanning electronic microscopy (SEM). The ion exchange capacity (IEC), proton conductivity, water uptake, vanadium ion permeability and mechanical properties were measured. As a result, the acid-base blend membranes exhibit higher water uptake, IEC and lower vanadium ion permeability compared to Nafion117 membranes and all these properties decrease with the increase of PEI. In VRB single cell test, the VRB with blend membranes shows lower charge capacity loss, higher coulombic efficiency (CE) and energy efficiency (EE) than Nafion117 membrane. Furthermore, the acid-base blend membranes present stable performance up to 50 cycles with no significant decline in CE and EE. All experimental results indicate that the SPEEK/PEI (S/P) acid-base blend membranes show promising prospects for VRB

  12. Study of sulfonated polyether ether ketone with pendant lithiated fluorinated sulfonic groups as ion conductive binder in lithium-ion batteries

    Science.gov (United States)

    Wei, Zengbin; Xue, Lixin; Nie, Feng; Sheng, Jianfang; Shi, Qianru; Zhao, Xiulan

    2014-06-01

    In an attempt to reduce the Li+ concentration polarization and electrolyte depletion from the electrode porous space, sulfonated polyether ether ketone with pendant lithiated fluorinated sulfonic groups (SPEEK-FSA-Li) is prepared and attempted as ionic conductivity binder. Sulfonated aromatic poly(ether ether ketone) exhibits strong adhesion and chemical stability, and lithiated fluorinated sulfonic side chains help to enhance the ionic conductivity and Li+ ion diffusion due to the charge delocalization over the sulfonic chain. The performances are evaluated by cyclic voltammetry, electrochemical impedance spectroscopy, charge-discharge cycle testing, 180° peel testing, and compared with the cathode prepared with polyvinylidene fluoride binder. The electrode prepared with SPEEK-FSA-Li binder forms the relatively smaller resistances of both the SEI and the charge transfer of lithium ion transport. This is beneficial to lithium ion intercalation and de-intercalation of the cathode during discharging-charging, therefore the cell prepared with SPEEK-FSA-Li shows lower charge plateau potential and higher discharge plateau potential. Compared with PVDF, the electrode with ionic binder shows smaller decrease in capacity with the increasing of cycle rate. Meanwhile, adhesion strength of electrode prepared with SPEEK-FSA-Li is more than five times greater than that with PVDF.

  13. Thermal stability of sulfonated Poly(Ether Ether Ketone) films : on the role of Protodesulfonation

    NARCIS (Netherlands)

    Koziara, B.T.; Kappert, E.J.; Ogieglo, W.; Nijmeijer, Kitty; Hempenius, M.A.; Benes, N.E.

    Thin film and bulk, sulfonated poly(ether ether ketone) (SPEEK) have been subjected to a thermal treatment at 160–250 °C for up to 15 h. Exposing the films to 160 °C already causes partial desulfonation, and heating to temperatures exceeding 200 °C results in increased conjugation in the material,

  14. Use of Novel Reinforced Cation Exchange Membranes for Microbial Fuel Cells

    International Nuclear Information System (INIS)

    Kamaraj, Sathish-Kumar; Romano, Sergio Mollá; Moreno, Vicente Compañ; Poggi-Varaldo, H.M.; Solorza-Feria, O.

    2015-01-01

    This work has been focused on the synthesis and characterization of different blended membranes SPEEK-35PVA (Water), SPEEK-35PVA (DMAc) prepared by casting and nanofiber-reinforced proton exchange membranes Nafion-PVA-15, Nafion-PVA-23 and SPEEK/PVA-PVB. The two first reinforced membranes were made up of Nafion® polymer deposited between polyvinyl alcohol (PVA) nanofibers. The last composite membrane is considered because the PVA is a hydrophilic polymer which forms homogeneous blends with SPEEK suitable to obtain high proton conductivity, while the hydrophobic PVB can produce blends in a phase separation morphology in which very low water uptake can be found. The synthesized membranes showed an outstanding stability, high proton conductivity, and enhanced mechanical and barrier properties. The membranes were characterized in single chamber microbial fuel cells (SCMFCs) using electrochemically enriched high sodic saline hybrid H-inocula (Geobacter metallireducen, Desulfurivibrio alkaliphilus, and Marinobacter adhaerens) as biocatalyst. The best performance was obtained with Nafion-PVA-15 membrane, which achieved a maximum power density of 1053 mW/m 3 at a cell voltage of 340 mV and displayed the lowest total internal resistance (Rint ≈ 522 Ω). This result is in agreement with the low oxygen permeability and the moderate conductivity found in this kind of membranes. These results are encouraging towards obtaining high concentrated sodic saline model wastewater exploiting MFCs

  15. Properties investigation of sulfonated poly(ether ether ketone)/polyacrylonitrile acid-base blend membrane for vanadium redox flow battery application.

    Science.gov (United States)

    Li, Zhaohua; Dai, Wenjing; Yu, Lihong; Liu, Le; Xi, Jingyu; Qiu, Xinping; Chen, Liquan

    2014-11-12

    Acid-base blend membrane prepared from sulfonated poly(ether ether ketone) (SPEEK) and polyacrylonitrile (PAN) was detailedly evaluated for vanadium redox flow battery (VRFB) application. SPEEK/PAN blend membrane exhibited dense and homogeneous cross-section morphology as scanning electron microscopy and energy-dispersive X-ray spectroscopy images show. The acid-base interaction of ionic cross-linking and hydrogen bonding between SPEEK and PAN could effectively reduce water uptake, swelling ratio, and vanadium ion permeability, and improve the performance and stability of blend membrane. Because of the good balance of proton conductivity and vanadium ion permeability, blend membrane with 20 wt % PAN (S/PAN-20%) showed higher Coulombic efficiency (96.2% vs 91.1%) and energy efficiency (83.5% vs 78.4%) than Nafion 117 membrane at current density of 80 mA cm(-2) when they were used in VRFB single cell. Besides, S/PAN-20% membrane kept a stable performance during 150 cycles at current density of 80 mA cm(-2) in the cycle life test. Hence the SPEEK/PAN acid-base blend membrane could be used as promising candidate for VRFB application.

  16. State of the water in crosslinked sulfonated poly(ether ether ketone). Two-dimensional differential scanning calorimetry correlation mapping

    Energy Technology Data Exchange (ETDEWEB)

    Al Lafi, Abdul G. [Department of Chemistry, Atomic Energy Commission, Damascus, P.O. Box 6091 (Syrian Arab Republic); Hay, James N., E-mail: cscientific9@aec.org.sy [The School of Metallurgy and Materials, College of Physical Sciences and Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT (United Kingdom)

    2015-07-20

    Highlights: • 2D-DSC mapping was applied to analyze the heat flow responses of hydrated crosslinked sPEEK. • Two types of loosely bond water were observed. • The first was bond to the sulfonic acid groups and increased with ion exchange capacity. • The second was attributed to the polar groups introduced by ions irradiation and increased with crosslinking degree. • DSC combined with 2D mapping provides a powerful tool for polymer structural determination. - Abstract: This paper reports the first application of two-dimensional differential scanning calorimetry correlation mapping, 2D-DSC-CM to analyze the heat flow responses of sulphonated poly(ether ether ketone), sPEEK, films having different ion exchange capacity and degrees of crosslinks. With the help of high resolution and high sensitivity of 2D-DSC-CM, it was possible to locate two types of loosely bound water within the structure of crosslinked sPEEK. The first was bound to the sulfonic acid groups and dependent on the ion exchange capacity of the sPEEK. The second was bound to other polar groups, either introduced by irradiation with ions and dependent on the crosslinking degree or present in the polymer such as the carbonyl groups or terminal units. The results suggest that the ability of the sulfonic acid groups in the crosslinked sPEEK membranes to adsorb water molecules is increased by crosslinking, probably due to the better close packing efficiency of the crosslinked samples. DSC combined with 2D correlation mapping provides a fast and powerful tool for polymer structural determination.

  17. Poly (ether ether ketone) membranes for fuel cells

    International Nuclear Information System (INIS)

    Marrero, Jacqueline C.; Gomes, Ailton de S.; Filho, Jose C.D.; Hui, Wang S.; Oliveira, Vivianna S. de

    2015-01-01

    Polymeric membranes were developed using a SPEEK polymer matrix (sulphonated poly (ether ether ketone)), containing hygroscopic particles of zirconia (Zr) (incorporated by sol-gel method), for use as electrolyte membranes in fuel cells. SPEEK with different sulfonation degrees were used: 63 and 86%. The thermal analysis (TGA and DSC) was carried out to characterize the membranes and electrochemical impedance spectroscopy (EIS) was carried out to evaluating the proton conductivity of the membranes. Additional analysis were underway in order to characterize these membranes, which include: X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) in order to evaluate the influence of zirconia and sulfonation degree on the properties of the membranes. (author)

  18. Poly (ether ether ketone) membranes for fuel cells; Membranas de poli (eter eter cetona) sulfonado para celulas a combustivel

    Energy Technology Data Exchange (ETDEWEB)

    Marrero, Jacqueline C.; Gomes, Ailton de S.; Filho, Jose C.D., E-mail: jacquecosta@gmail.com [Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, RJ (Brazil); Hui, Wang S. [Universidade de Sao Paulo (USP), Sao Paulo, SP (Brazil); Oliveira, Vivianna S. de [Escola Tecnica Rezende-Rammel, Rio de Janeiro, RJ (Brazil)

    2015-07-01

    Polymeric membranes were developed using a SPEEK polymer matrix (sulphonated poly (ether ether ketone)), containing hygroscopic particles of zirconia (Zr) (incorporated by sol-gel method), for use as electrolyte membranes in fuel cells. SPEEK with different sulfonation degrees were used: 63 and 86%. The thermal analysis (TGA and DSC) was carried out to characterize the membranes and electrochemical impedance spectroscopy (EIS) was carried out to evaluating the proton conductivity of the membranes. Additional analysis were underway in order to characterize these membranes, which include: X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) in order to evaluate the influence of zirconia and sulfonation degree on the properties of the membranes. (author)

  19. München ei ole ainult Oktoberfest / Albert Trapeezh

    Index Scriptorium Estoniae

    Trapeež, Albert, pseud., 1947-

    2005-01-01

    Eesti nüüdiskunsti näitusest Müncheni kunstikeskuses Aktionsforum. Osalesid Siim-Tanel Annus, Jaan Elken, Jüri Kass, Ülle Marks, Eve Kask, Lennart Mänd, Tiiu Kirsipuu, Leonhard Lapin, Raul Meel, Liina Siib, Andres Tolts ja Urmas Viik. Näituse kataloogi eestipoolsed tekstid kirjutas Harry Liivrand. Müncheni moodsaimast kunstikeskusest Pinakothek der Moderne'ist

  20. Generation of suprathermal electrons during plasma current startup by lower hybrid waves in a tokamak

    International Nuclear Information System (INIS)

    Ohkubo, K.; Toi, K.; Kawahata, K.

    1984-10-01

    Suprathermal electrons which carry a seed current are generated by non-resonant parametric decay instability during initial phase of lower hybrid current startup in the JIPP T-IIU tokamak. From the numerical analysis, it is found that parametrically excited lower hybrid waves at lower side band can bridge the spectral gap between the thermal velocity and the low velocity end in the pump power spectrum. (author)

  1. Klassikalise arhitektuuriga Pekingisse / Urmas Oja

    Index Scriptorium Estoniae

    Oja, Urmas, 1981-2012

    2008-01-01

    Pekingi Eesti saatkonnahoone arhitektuurikonkursist. I koht - "Tetris" autorid Andres Põime, Lauri Vaimel, Liisa Põime; II - "Maadligi, vettligi maja", autorid Erik Nobel, Christian Jensen, Kristen Herup Sovang, Soren Andersson, Pille Kivihall, Dan Ljungar, Hans Willadsen - arhitektuuribüroost NOBEL arkitekter; III - "Ai sha ni ya", autorid Kalle Vellevoog, Velle Kadalipp, Tiiu Truus, Martin Prommik arhitektuuribüroost JVR. Konkursitöödest on Eesti Ahitektuurimuuseumis avatud näitus. Küsimustele vastab arhitekt Andres Põime

  2. Milleks monumenti = Why a monument? / Heie Treier

    Index Scriptorium Estoniae

    Treier, Heie, 1963-

    2006-01-01

    2006. a. toimunud Jüri Lotmani mälestusmärgi konkursist, Mati Karmini ja Andres Lunge võidutööst. Monumentide positiivseid näiteid: Tubina plats Tartus (Aili Vahtrapuu, Veronika Valk, Louis Dandrel), ideekavandid: Estonia teatri juubelimonument Tallinnas (Tiiu Kirsipuu, Üla Koppel) ja Eesti iseseisvuse monument Pärnus Rüütli platsil (Mart Aas, Kaarel Eelma, Mikk Mutso). Bibl. lk. 73

  3. Žürii kommenteerib Kultuurkapitali arhitektuuripreemiaid 2008 / Marika Lõoke, Laila Põdra, Liina Jänes... [jt.

    Index Scriptorium Estoniae

    2009-01-01

    Peapreemia: Markus Kaasik, Andres Ojari, Ilmar Valdur, Mihkel Tüür, Kalle Komissarov (Pärnu Keskraamatukogu hoone), tegevuspreemia: Maarja Kask, Ralf Lõoke, Neeme Külm, Ingrid Ruudi (projekt Gaasitoru 11. Veneetsia arhitektuuribiennaalil), aastapreemia: Maarja Kask, Ralf Lõoke, Karli Luik (Tartu Kesklinna Kooli juurdeehitus) ja Peep Jänes (Raudna Põhikooli spordihoone), sisearhitektuuri preemia: Tea Tammelaan, Malle Jürgenson, Krista Lepland, restaureerimispreemia: Mari Hammer, Tiiu Lõhmus, Helve Ilves, Villu Kadakas (Vanalinna Hariduskolleegiumi hoone)

  4. Näitused / Mari Sobolev

    Index Scriptorium Estoniae

    Sobolev, Mari, 1968-

    1998-01-01

    Kunstihoone ja Rotermanni soolaladu: "Kujundid, objektid, stseenid - vaatenurki prantsuse kunstile alates 1978. aastast"; Sammas-galerii: Tiiu Rebane ja Karl Nagel "Tänapäeva müüt"; Raatuse galerii: Elo Järv "Saavad uuteks liblikateks" (nahakunst); Tammsaare muuseum: "Mis jääb mällu" (sissevaade Saksamaa ajalukku ajavahemikul 1933-1949); Hotell "Olümpia" Forte saal: Gabor Dienesi personaalnäitus (maalid)

  5. Tallinna Lennujaama kauba- ja tolliterminaal. Lennujaama 2, Tallinn / Andres Põime

    Index Scriptorium Estoniae

    Põime, Andres

    1998-01-01

    Kaubateeninduskeskuse puhul on tegemist suure, plaanimõõtudes 36x102 meetrise metallkonstruktsioonis, sandwich tüüpi paneelidega kaetud laohoonega, kus ühelt poolt tuuakse tollitav kaup lennukitelt sisse ja teiselt poolt viiakse tollitud kaup välja. Peatöövõtja : Normanni Linnagrupi AS. Ehitaja : Merko. Peaprojekteerija : K-Projekt. Arhitektuurne lahendus : Stuudio 3. Arhitekt Andres Põime ; töögrupp Vivian Oruvee, Tiiu Raudsepp, Reet Põime. Projekt 1997-98, valmis 1998.

  6. Torupillitalu vägevad isad ja lapsed / Kristel Kirss

    Index Scriptorium Estoniae

    Kirss, Kristel, 1967-

    2008-01-01

    Rahvapillimängija ja pillimeistri Ants Tauli ja Tiiu Tauli Torupilli talust Valgamaal. Saunast, elamust, puhkemajast ja välikäimlast, mille on ehitanud Ants Taul. Hoovi ehib Erna Viitoli skulptuur torupillimängijast. Külalistemaja tugipalkidele nikerdas näod kunstiõpetaja Valev Elerand. Anu ja Triinu Taul isa Ants Taulist, vanaisa Johannes Taulist, oma lapsepõlvest. 9 värv. vaadet

  7. 100 maja Veneetsias / Karen Jagodin

    Index Scriptorium Estoniae

    Jagodin, Karen, 1982-

    2010-01-01

    Eesti väljapanekust "100 maja / houses" (komissar Ülar Mark, kuraator Karen Jagodin, autorid Kalle Vellevoog, Tiiu Truus, Martin Pedanik, Karen Jagodin) 12. Venezia arhitektuuribiennaalil "Inimesed kohtuvad arhitektuuris" (üldkuraator Kazuyo Sejima). Lisaks 21. sajandi eramutele on ekspositsioonis valik märgilise tähendusega eramuid Eesti Vabariigi ajast aastatel 1918-1940 ja nõukogude ajajärgust

  8. Kaliningradi biennaal / Sandra Jõgeva

    Index Scriptorium Estoniae

    Jõgeva, Sandra, 1976-

    2008-01-01

    IX rahvusvaheline graafikabiennaal "Kaliningrad-Königsberg 2008" Kaliningradi kunstigaleriis 15. IX-15. XI. Eesti väljapanek (kuraator Eha Komissarov, kujundaja Marko Nautras, osalejad: Jaanika Okk, Kaarel Kütas, Lauri Koppel, Gerda Märtens, Raul Meel, Lembe Ruben, HULA, Villem Jahu, Tiiu Pirsko, Mati Veermets, Sandra Jõgeva) sai ekspositsioonipreemia. Grand prix - Paulis Liepa, I preemia - Olrik Kohlhoff, II - Dominica Sadowska, III - Raffael Rheinsberg, eripreemia - Markus Lampinen

  9. Pansionaat Pärnus : Seedri 4 = Pension in Pärnu : Seedri 4 / Liina Jänes

    Index Scriptorium Estoniae

    Jänes, Liina, 1977-

    2008-01-01

    Arhitekt Kalle Vellevoog, kaasa töötas Margus Tamm. Sisearhitekt Tiiu Truus. Maastikuarhitekt Vaike Parker. Konstruktor Ahti Lääne. Peatöövõtja: YIT Ehitus AS. Eesti Kultuurkapitali arhitektuuri sihtkapitali 2007. a. arhitektuuripreemia. Žürii liikme Marika Lõokese arvamus. Asendi- ja II korruse plaan, lõige, 3 värv. välisvaadet, sisevaade

  10. Krakówi graafikasügis / Anne Untera

    Index Scriptorium Estoniae

    Untera, Anne, 1951-

    2009-01-01

    16. septembril avatud Krakówi rahvusvahelisest graafikatriennaalist. Grand prix läks poola graafikule Joanna Piechile. Läti graafik Guntars Sietiņš pälvis Varssavi kunstiakadeemia rektori auhinna. Eestit esindavad peanäitusel Ülle Marks, Benjamin Vasserman ja Eve Kask, satelliitnäitusel "PrintArt" Katowices Tiiu Prisko ja Mati Veermets ning kutsutud osalejatega satelliitnäitusel Torunis Evi Tihemets

  11. Round-table discussion at Tallinn City Council (March 8, 2010). Part one : The European Union strategy for the Baltic Sea Region - a challenge for cooperation on local and regional levels

    Index Scriptorium Estoniae

    2010-01-01

    Konverentsi ümarlaual võtsid sõna Erik Terk, Toomas Vitsut, Thomas Johansson, Katrin Savomägi, Jasmin Etelämäki, Edvins Karnitis, Ulf Johansson, Per Gudmund Lindencrona, Mika Keränen, Uno Aldegren, Georg Sootla, Heikki Telakivi, Piret Hedin, Mart Repnau, Jüri Riives, Madis Kanarbik, Enn Saar, Tiiu Evert, Galina Gribanova, Keijo Sahrman, Linda Talve

  12. Assessment of labour market returns in the case of gender unique human capital

    OpenAIRE

    Paas, Tiiu; Tverdostup, Maryna

    2016-01-01

    Maryna Tverdostup, Tiiu Paas, ERSA 2016: The paper focuses on the identification of the unique, non-reached by the opposite gender human capital and the analysis of its effect on the earning profiles of unique human capital holders. The overwhelming research aim is to better understand the possible reasons behind gender wage disparities, focusing on the unique features of male and female human capital and their returns. When assessing the gender pay disparities, variation of human capital cha...

  13. Miks koolis diskrimineeritakse poisse? / Raivo Juurak

    Index Scriptorium Estoniae

    Juurak, Raivo, 1949-

    2015-01-01

    Eelmisel aastal peetud soolise võrdõiguslikkuse konverentsi sõnumiks on, et Eesti koolis diskrimineerivad õpetajad poisse. Küsimusele, kuidas poisid tüdrukutele järele aidata, vastavad Tallinna prantsuse lütseumi õpetaja Anneli Oidsalu, TLÜ kasvatusteaduste õppejõud Tiiu Kuurme, psühholoog Tiia Lister, haridustöötaja Enn Veesalu ja õpetaja Lembit Jakobson

  14. Decoupling ion conductivity and fluid permeation through optimizing hydrophilic channel morphology

    Energy Technology Data Exchange (ETDEWEB)

    Chu, Peter Po-Jen, E-mail: pjchu@cc.ncu.edu.tw; Fang, Yu-Shin; Tseng, Yu-Chen [Department of Chemistry, National Central University, No. 300, Jhongda Rd., Jhongli City, Taoyuan County 32001, Taiwan (R.O.C.) (China)

    2016-05-18

    Approaches to improve membrane ion conductivity usually leads to higher degree of swelling, more serious fuel cross-over and often sacrificed membrane mechanical strength. Preserving all three main membrane properties is a tough challenge in searching high ion conducting fuel cell membrane. The long standing dilemma is resolved by decoupling ion conduction and fluid permeation property by creating optimized channel morphology using external electric field poling. Success of this approach is demonstrated in the proton conducting membrane composed of poly(ether sulfones) (PES) and sulfonated poly(ether ether ketone) (sPEEK, degree of sulfonation=50%) composites prepared under electric field poling condition. The external field enhanced the aromatic chain ordering from both sPEEK and PES and improved the miscibility. This induced interaction is conducive to the formation of more densely packed amorphous domains that eventually leads to preferentially ordered hydrophilic proton conducting channels having a average dimension (3 nm) smaller than that in generic sPEEK or Nafion. The narrower but more ordered channel displayed much lower methanol permeability (3.17×10{sup −7} cm{sup 2}/s), and lower swelling ratio (31.20%), while the conductivity (~10{sup −1} S/cm) is higher than that of Nafion, or sPEEK at higher (64%) degree of sulfonation. The composite is chemically stable and highly durable with improved membrane mechanical strength. Nearly 50% increase of DMFC power output is observed using this membrane, and the best power density is recorded at 155 mA/cm{sup 2} (80 °C, 1M Methanol).

  15. Morphology Effect on Proton Dynamics in Nafion® 117 and Sulfonated Polyether Ether Ketone

    Science.gov (United States)

    Leong, Jun Xing; Diño, Wilson Agerico; Ahmad, Azizan; Daud, Wan Ramli Wan; Kasai, Hideaki

    2016-09-01

    We report results of our experimental and theoretical studies on the dynamics of proton conductivity in Nafion® 117 and self-fabricated sulfonated polyether ether ketone (SPEEK) membranes. Knowing that the presence of water molecules in the diffusion process results in a lower energy barrier, we determined the diffusion barriers and corresponding tunneling probabilities of Nafion® 117 and SPEEK system using a simple theoretical model that excludes the medium (water molecules) in the initial calculations. We then propose an equation that relates the membrane conductivity to the tunneling probability. We recover the effect of the medium by introducing a correction term into the proposed equation, which takes into account the effect of the proton diffusion distance and the hydration level. We have also experimentally verified that the proposed equation correctly explain the difference in conductivity between Nafion® 117 and SPEEK. We found that membranes that are to be operated in low hydration environments (high temperatures) need to be designed with short diffusion distances to enhance and maintain high conductivity.

  16. The Influence of Operation Temperature of the Characteristic of Sulfonated Polyether-Ether Ketone Electrolyte Membrane

    International Nuclear Information System (INIS)

    Sri Handayani; Eniya Listiani Dewi

    2008-01-01

    Recently, high temperature Direct Methanol Fuel Cell (DMFC) has been receiving great attention, because provide faster reaction kinetic, the enhance electrode kinetics, reduced size and reduce Pt-based catalyst poisoning by CO. But at high temperature, it will decrease the membrane performance i.e. low proton conductivity affected by humidification and high methanol crossover as happening to Nafion-117 membrane (commercial membrane). To solve this problems, sulfonated polyether-ether ketone and composite (silica additive) as electrolyte membrane at high temperature DMFC was tried to use. In this research, sPEEK with sulfonation degree (SD) 47 % and 68 % and addition silica 3 wt % were used as electrolyte membranes. Proton conductivity and methanol permeability of these membranes were measured at various temperatures (25, 50, 90 and 140 C ). Proton conductivity of membranes were measured by standard bridge impedance spectroscopy (LCR-meter, HIOKI 3522-50) and it was found about 0.01-0.04 S/cm. Methanol permeability of membranes were investigated by diffusion cell and gave the result about 10 - 6 - 10 - 7cm 2 /s. The best sPEEK membrane was sPEEK membrane with SD 68 % and the addition of silica 3 wt%, signed by highest selectivity value (ratio proton conductivity to methanol permeability). Therefore, electrolyte membrane based sulfonated polyether-ether ketone (SD 68 %) with silica could be used at high temperature which give promising as solid electrolyte membrane in application high temperature DMFC. (author)

  17. Proton exchange membranes from sulfonated polyetheretherketone and sulfonated polyethersulfone-cardo blends: Conductivity, water sorption and permeation properties

    International Nuclear Information System (INIS)

    Li, Yongli; Nguyen, Quang Trong; Schaetzel, Pierre; Lixon-Buquet, Camille; Colasse, Laurent; Ratieuville, Vincent

    2013-01-01

    Five blend membranes were prepared by solvent evaporation from solutions of the synthesized sulfonated polyetheretherketone (SPEEK) and sulfonated polyethersulfone-cardo (SPESc). Their ion exchange capacity and degree of sulfonation determined by acid–base titration and by thermogravimetric analysis were consistent. The blends glass transition behavior obtained by differential scanning calorimetry suggests that the two sulfonated polymers are compatible in the whole composition range. The values of the activation energy for proton transport determined by conductivity measurements on the SPEEK-based blend membranes were in the range of 13–34 kJ mol −1 , which suggest a mixed transport mechanism that involves both proton jumps on ionic sites and water of hydration and diffusion of proton–water complex in hydrophilic domains. The water vapor sorption in the membranes exhibits sigmoid-shape isotherms which were well fitted by the “new dual mode sorption” model, and the fitted parameters values were successfully used to model the change in the water permeation flux with the upstream water activity using the first Fick's diffusion equation. The fast increase in the permeation flux beyond a critical value of activity (0.5) was owing to the exponential concentration-dependent diffusion coefficient. These modelings allowed us to show a strong increase in the limit diffusion coefficient of water and a decrease in the water-diffusion plasticization coefficient with the SPEEK content in the polymer blends

  18. Microbial desalination cell with sulfonated sodium poly(ether ether ketone) as cation exchange membranes for enhancing power generation and salt reduction.

    Science.gov (United States)

    Moruno, Francisco Lopez; Rubio, Juan E; Atanassov, Plamen; Cerrato, José M; Arges, Christopher G; Santoro, Carlo

    2018-06-01

    Microbial desalination cell (MDC) is a bioelectrochemical system capable of oxidizing organics, generating electricity, while reducing the salinity content of brine streams. As it is designed, anion and cation exchange membranes play an important role on the selective removal of ions from the desalination chamber. In this work, sulfonated sodium (Na + ) poly(ether ether ketone) (SPEEK) cation exchange membranes (CEM) were tested in combination with quaternary ammonium chloride poly(2,6-dimethyl 1,4-phenylene oxide) (QAPPO) anion exchange membrane (AEM). Non-patterned and patterned (varying topographical features) CEMs were investigated and assessed in this work. The results were contrasted against a commercially available CEM. This work used real seawater from the Pacific Ocean in the desalination chamber. The results displayed a high desalination rate and power generation for all the membranes, with a maximum of 78.6±2.0% in salinity reduction and 235±7mWm -2 in power generation for the MDCs with the SPEEK CEM. Desalination rate and power generation achieved are higher with synthesized SPEEK membranes when compared with an available commercial CEM. An optimized combination of these types of membranes substantially improves the performances of MDC, making the system more suitable for real applications. Copyright © 2018 The Authors. Published by Elsevier B.V. All rights reserved.

  19. Novel sulfonated poly (ether ether ketone)/phosphonic acid-functionalized titania nanohybrid membrane by an in situ method for direct methanol fuel cells

    Science.gov (United States)

    Wu, Hong; Cao, Ying; Li, Zhen; He, Guangwei; Jiang, Zhongyi

    2015-01-01

    Sulfonated poly (ether ether ketone)/phosphonic acid-functionalized titania nanohybrid membranes are prepared by an in situ method using titanium tetrachloride (TiCl4) as inorganic precursor and amino trimethylene phosphonic acid (ATMP) as modifier. Phosphonic acid-functionalized titania nanoparticles with a uniform particle size of ∼50 nm are formed and dispersed homogeneously in the SPEEK matrix with good interfacial compatibility. Accordingly, the nanohybrid membranes display remarkably enhanced proton conduction property due to the incorporation of additional sites for proton transport and the formation of well-connected channels by bridging the hydrophilic domains in SPEEK matrix. The nanohybrid membrane with 6 wt. % of phosphonic acid-functionalized titania nanoparticles exhibits the highest proton conductivity of 0.334 S cm-1 at 65 °C and 100% RH, which is 63.7% higher than that of pristine SPEEK membrane. Furthermore, the as-prepared nanohybrid membranes also show elevated thermal and mechanical stabilities as well as decreased methanol permeability.

  20. L-Arginine modified multi-walled carbon nanotube/sulfonated poly(ether ether ketone) nanocomposite films for biomedical applications

    Science.gov (United States)

    Kaya, Hatice; Bulut, Osman; Kamali, Ali Reza; Ege, Duygu

    2018-06-01

    Favorable implant-tissue interactions are crucial to achieve successful osseointegration of the implants. Poly(ether ether ketone) (PEEK) is an interesting alternative to titanium in orthopedics because of its low cost, high biocompatibility and comparable mechanical properties with cancellous bone. Despite these advantages; however, the untreated surface of PEEK fails to osseointegrate due to its bioinert and hydrophobic behavior. This paper deals with the surface modification of PEEK with a novel method. For this, PEEK was first treated with concentrated sulfuric acid to prepare sulfonated PEEK (SPEEK) films using a solvent casting method. Then, 1 and 2 wt% multi-walled carbon nanotube was incorporated into SPEEK to form nanocomposite films. The samples were characterized with Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscopy. After successful preparation of the nanocomposite films, L-arginine was covalently conjugated on the nanocomposite films to further improve their surface properties. Subsequently, the samples were characterized using X-ray Photoemission Spectroscopy (XPS), water contact angle measurements and Atomic Force Microscopy (AFM) and Dynamic Mechanical Thermal Analysis (DMTA). Finally, cell culture studies were carried out by using Alamar Blue assay to evaluate the biocompatibility of the films. The results obtained indicate the successful preparation of L-arginine-conjugated MWCNT/SPEEK nanocomposite films. The modified surface shows potential to improve implants' mechanical and biological performances.

  1. Selectivity of Direct Methanol Fuel Cell Membranes

    Directory of Open Access Journals (Sweden)

    Antonino S. Aricò

    2015-11-01

    Full Text Available Sulfonic acid-functionalized polymer electrolyte membranes alternative to Nafion® were developed. These were hydrocarbon systems, such as blend sulfonated polyetheretherketone (s-PEEK, new generation perfluorosulfonic acid (PFSA systems, and composite zirconium phosphate–PFSA polymers. The membranes varied in terms of composition, equivalent weight, thickness, and filler and were investigated with regard to their methanol permeation characteristics and proton conductivity for application in direct methanol fuel cells. The behavior of the membrane electrode assemblies (MEA was investigated in fuel cell with the aim to individuate a correlation between membrane characteristics and their performance in a direct methanol fuel cell (DMFC. The power density of the DMFC at 60 °C increased according to a square root-like function of the membrane selectivity. This was defined as the reciprocal of the product between area specific resistance and crossover. The power density achieved at 60 °C for the most promising s-PEEK-based membrane-electrode assembly (MEA was higher than the benchmark Nafion® 115-based MEA (77 mW·cm−2 vs. 64 mW·cm−2. This result was due to a lower methanol crossover (47 mA·cm−2 equivalent current density for s-PEEK vs. 120 mA·cm−2 for Nafion® 115 at 60 °C as recorded at OCV with 2 M methanol and a suitable area specific resistance (0.15 Ohm cm2 for s-PEEK vs. 0.22 Ohm cm2 for Nafion® 115.

  2. Selectivity of Direct Methanol Fuel Cell Membranes.

    Science.gov (United States)

    Aricò, Antonino S; Sebastian, David; Schuster, Michael; Bauer, Bernd; D'Urso, Claudia; Lufrano, Francesco; Baglio, Vincenzo

    2015-11-24

    Sulfonic acid-functionalized polymer electrolyte membranes alternative to Nafion(®) were developed. These were hydrocarbon systems, such as blend sulfonated polyetheretherketone (s-PEEK), new generation perfluorosulfonic acid (PFSA) systems, and composite zirconium phosphate-PFSA polymers. The membranes varied in terms of composition, equivalent weight, thickness, and filler and were investigated with regard to their methanol permeation characteristics and proton conductivity for application in direct methanol fuel cells. The behavior of the membrane electrode assemblies (MEA) was investigated in fuel cell with the aim to individuate a correlation between membrane characteristics and their performance in a direct methanol fuel cell (DMFC). The power density of the DMFC at 60 °C increased according to a square root-like function of the membrane selectivity. This was defined as the reciprocal of the product between area specific resistance and crossover. The power density achieved at 60 °C for the most promising s-PEEK-based membrane-electrode assembly (MEA) was higher than the benchmark Nafion(®) 115-based MEA (77 mW·cm(-2) vs. 64 mW·cm(-2)). This result was due to a lower methanol crossover (47 mA·cm(-2) equivalent current density for s-PEEK vs. 120 mA·cm(-2) for Nafion(®) 115 at 60 °C as recorded at OCV with 2 M methanol) and a suitable area specific resistance (0.15 Ohm cm² for s-PEEK vs. 0.22 Ohm cm² for Nafion(®) 115).

  3. Kunst, pangad, raha!

    Index Scriptorium Estoniae

    2006-01-01

    Flo Kasearu ja Alide Zvorovski kunstiprojektist "Majad, näidake oma sisu!". 7. IX sai Hansapanga fassaadil Liivalaia t. näha Ene-Liis Semperi ja Marko Mäetamme portreid, 8.-9. IX saab Eesti Panga fassaadil Estonia pst. näha Lydia Koidula ja Carl Robert Jakobsoni portreid. Panga ja kunasti/kultuuri suhetest, kunsti toetamisest, panga ootustest kunstilt. Arvamust avaldavad Eesti Panga avalike suhete büroo juhataja Janno Toots ja Hansapanga turundusdirektor Tiiu Tälli

  4. Üleminekuga kaduma või üle läinud? / Andri Ksenofontov

    Index Scriptorium Estoniae

    Ksenofontov, Andri, 1962-

    2011-01-01

    Näitus "Lost in Transition" Eesti Kaasaegse Kunsti Muuseumis 28. aug.-ni 2011, kuraator Rael Artel. Gergely László ja Katarina Ševići, Katarina Zdjelari, Flo Kasearu, Wojtek Doroszuki, Ivan Jurica, Anna-Stina Treumundi, Arnis Balčuse, Aleksei Gordini, Zampa di Leone töödest. Liisa Kruusmäe näitus "Pealtkuulatud lood" 11.-23. juulini ning Karl-Kristjan Nageli ja Tiiu Rebase näitus "Kohtucase - Epic Winning" Draakoni Galeriis 25.07.-6.08.2011

  5. E-kursuste konkursi tulemused / Reelyka Läheb

    Index Scriptorium Estoniae

    Läheb, Reelyka

    2004-01-01

    01.09.-31.10. 2003 toimus Tallinna Pedagoogikaülikoolis konkurss "Eesti e-Ülikooli toetus e-õppe kursustele, sügis 2003" eesmärgiga töötada välja uusi veebipõhiseid kursuseid. Konkursile laekunud 10 tööst otsustati ellu rakendada kõik. Projekti täitmiseks määrati toetused Hindrek Lootusele, Leif Kalevile, Anu Tootsile, Raivo Vetikule, Tiiu Reimole, Ivar Pornile, Sirje Pihtile, Kai Randrüütile ja Reelyka Lähebile

  6. Dr. Arthur Puksovi Fondi teadaanne / Ivar Nippak

    Index Scriptorium Estoniae

    Nippak, Ivar

    2005-01-01

    1975. aastal asutatud fondi eesmärgiks on innustada Eesti vanema ajaloo teaduslikku uurimist ja vastavate tööde kirjastamist. 2004. aastal tunnistati I auhinna vääriliseks Tiiu Reimo monograafia "Raamatukultuur Tallinnas 18. saj. teisel poolel" (2001); II auhinna sai Aivar Põldvee monograafia "Pakri rootslaste kaebused Karl XI-le 1684. aastal: muutuste aeg Harju-Madise ja Risti kihelkonnas" (2001) ja pikema artikli "Talurahvakoolid Eesti- ja Liivimaal 17. sajandi viimasel veerandil" (2002) eest. 2005. aastal fond auhindu ei andnud. Auhinnavõistlus 2006. aastaks on välja kuulutatud

  7. Eesti läheb Pekingisse / Karin Hallas-Murula

    Index Scriptorium Estoniae

    Hallas-Murula, Karin, 1957-

    2008-01-01

    Pekingi Eesti saatkonnahoone konkursist žüriiliikme pilguga. Premeeritud ja esiletõstetud töödest. Võidutöö autorid - Lauri Vaimel, Andres Põime, Liisa Põime; II koht - Erik Nobel ja Nobel Arkitekten, Taani-Eesti; III koht - Kalle Vellevoog, Velle Kadalipp, Tiiu Truus, Martin Prommik; ostudega esiletõstetud tööde autorid - Priit Pent ja Raul Järg Bucoma OÜ-st ning Jan Skolimowski, Peeter Loo, Kaspar Kruuse ja Li Vene KAMP Arhitektide OÜ-st. Hiina ja Pekingi uusehitistest, arhitektidest

  8. Vanalinna Hariduskolleegiumi gümnaasium = Collegium Educationis Revaliae gymnasium

    Index Scriptorium Estoniae

    2008-01-01

    Vanalinna Hariduskolleegiumi gümnaasiumi hoone (Vene 22, Tallinn) restaureerimisest ja sisekujundusest. Arhitekt: Marie Hammer. Sisearhitekt: Tiiu Lõhmus. Hoone sisustamisel ja kujundamisel on püütud säilitada võimalikult palju ajaloolist üldilmet. Osa sisustusest ja valgustitest on valmistatud eritellimusena T. Lõhmuse kavandite järgi. .T. Lõhmusest, tema tähtsamad tööd. Keldri, I-III korruse ja pööningu plaan, värv. välisvaade, 10 sisevaadet, foto T. Lõhmusest

  9. Punanahklusest: Majakovskist indiaanlasteni / Vaapo Vaher

    Index Scriptorium Estoniae

    Vaher, Vaapo, 1945-

    2011-01-01

    Tutvustus: Jangfeldt, Bengt. Mäng elu peale : Vladimir Majakovski ja tema lähikond / tõlkinud Anu Saluäär. Tallinn : Varrak, 2011 ; Céline, Louis-Ferdinand. Reis öö lõppu / tõlkinud Heli Allik. Tallinn : Varrak, 2010 ; Simone, Claude. Flandria tee / tõlkinud Leena Tomasberg. Tallinn : Eesti Raamat, 2011 ; Härm, Tiiu. Jää voolab : Eesti polaarränduri August Masiku maailm. Tallinn : Eesti Raamat, 2010 ; Page, Jake. Suure vaimu rüpes : Ameerika indiaanlaste 20 000-aastane ajalugu / tõlkinud Matti Piirimaa. Tallinn : Tänapäev, 2011

  10. Doktoritööd : [2000

    Index Scriptorium Estoniae

    2000-01-01

    6. okt. 2000 TPÜ-s ökoloogia doktorikraadi kaitsmisnõukogu koosolekul tuleb kaitsmisele Tiiu Alliksaare doktoritöö "Spatial and temporal variability of the distribution of spherical fly-ash particles in sediments in Estonia". 15. dets. 2000 kaitsevad Mart Kivimäe TPÜ kultuuriajaloo doktoritööde kaitsmisnõukogu koosolekul doktoritööd "Dialoogiline historism. Ajaloomõtlemise kolm strateegiat ja nende dialoogisuhted minevikuga saksa teaduskultuuri näitel (R. Kosselleck, J. Rüsen, E. Nolte)" ja Hannes Walter doktoritööd "Eesti teenetemärgid"

  11. Quick profile-reorganization driven by helical field perturbation for suppressing tokamak major disruptions

    International Nuclear Information System (INIS)

    Yamazaki, K.; Kawahata, K.; Ando, R.

    1986-09-01

    Disruptive behavior of magnetic field configuration leading to tokamak major disruption is found to be controlled by a mild ''mini-disruption'' which is induced by the compact external modular multipole-field coils with m = 3/n = 2 dominant helical field component in the JIPP T-IIU tokamak. This mini-disruption ergodizes the m = 2/n = 1 magnetic island quickly but mildly and then prevents the profile of electron temperature from flattening. This quick profile-reorganization is effective to avoid the two-step disruption (pre- and major disuptions) responsible for the chatastrophic current termination. (author)

  12. TÜ, TPÜ ja EHI uusi magistreid / Eda Tursk, Hille Roots, Heidi Meier

    Index Scriptorium Estoniae

    Tursk, Eda

    2004-01-01

    Tartu ülikooli eesti ja soome-ugri keeleteaduse osakonnas ning kirjanduse ja rahvaluule osakonnas kaitsesid 2003.a. magistritööd Niina Aasmäe, Piret Voll, Larissa Degel, Reet Hendrikson, Tiina Pai, Petar Kehayov, Anna Baidullina, Katrin Ennus, Kristi Jõesaar, Ell Vahtramäe, Lauri Sommer, Andreas Kalkun, Mirjam Hinrikus, Kristel Nõlvak. Tallinna Pedagoogikaülikoolis kaitsesid 2003.a. magistritööd Sirje Nootre, Merike Mägedi, Tiiu Koovit, Heidi Meier, Jaanika Stackhouse, Lilian Ossi, Annika Vamper, Marika Mikkor, Piret Õunapuu, Helin Puksand, Taimi Rosenberg. Eesti Humanitaarinstituudis kaitses 2003.a. magistritööd Merilin Miljan

  13. Milliseid erialaseid teadmisi ja oskusi olete kasutanud oma praeguses ametis? : vastavad infoteaduse eriala vilistlased / interv. Hela Ojasaar, Margot Mahlapuu

    Index Scriptorium Estoniae

    2005-01-01

    Vastavad: EV Presidendi Kantselei direktori asetäitja, üldosakonna juhataja Riina Roomet, Mahtra Talurahvamuuseumi direktor Tiia-Helle Schmitte, EBS-i raamatukogu juhataja Eda Pihu, Euroopa Liidu asjade komisjoni nõunik (Riigikogu) Külli Kask, Kultuuriministeeriumi raamatukogunõunik Meeli Veskus, Võrumaa Keskraamatukogu direktor Inga Kuljus, Lääne Maakonna Keskraamatukogu direktor Ilme Sepp, Riigiarhiivi direktor Marge Tiidus, kirjastuse Pilgrim juht Tiina Ristimets, Tallinna Keskraamatukogu direktor Kaie Holm, Eesti ENIC/NARIC Keskuse infospetsialist Liia Tüür, Eesti Rahvusraamatukogu direktor Tiiu Valm, Tartu Ülikooli Raamatukogu teenindusdirektor Mare-Nelli Ilus, Viljandi Kultuuriakadeemia raamatukogunduse ja infoteaduste osakonna juhataja Ilmar Vaaro

  14. Tony Blair ei saanud Balti riikidelt loodetud järeleandmisi / Andris Feldmanis

    Index Scriptorium Estoniae

    Feldmanis, Andris, 1982-

    2005-01-01

    Balti riigid ei olnud nõus loobuma kümnendikust eurotoetustest. Tallinnas viibinud Suurbritannia peaministri Tony Blairi väitel on EL-i uue finantsperspektiivi vastuvõtmine just uute liikmesriikide huvides. Vt. samas: Tiiu Laks. Riigijuhi visiit põhjustas Tallinnas vaid lühiajalisi liiklusseisakuid; Lisa: Blairi esinemine ei reetnud ebaedu; Kaivo Kopli. Uusliikmed andsid tuld juba enne ettepanekute saamist; Lisa: Toetus vanadelt liikmesmaadelt; Märt Kivine. EL-i eelarve: lahjem kui kunagi varem. Kommenteerib Taavi Veskimägi

  15. Üleujutus arendaja hingel / Maris Kuuda

    Index Scriptorium Estoniae

    Kuuda, Maris

    2007-01-01

    Kohalikel omavalitsustel pole piisavalt hoobasid sundida arendajaid üleujutusohuga arvestama. Pärnusse hotelli September rajajad (arhitektid Emil Urbel, Andrus Mark) arvestavad ujutusohuga. Arvamust avaldavad Rene Reisner, Mari Sepp, Ülo Sults, Karri Tiigisoon, Indrek Rannik, Mark Soosaar, Tiiu Pärn, Merle Looring, Rita Sepp, Kaspar Alles. Keskkonnaministeeriumi plaanist muuta veeseadust, mis sunniks ehitajaid ja arendajaid arvestama üleujutusohuga. Lisadena olulise üleujutusohuga alad Eestis ning üleujutuste ohjamist käsitleva Euroopa Liidu direktiivi eelnõust

  16. Thermal Stability of Sulfonated Poly(Ether Ether Ketone) Films: on the Role of Protodesulfonation

    OpenAIRE

    Koziara, Beata; Kappert, Emiel; Ogieglo, Wojciech; Nijmeijer, Dorothea C.; Hempenius, Mark A.; Benes, Nieck Edwin

    2016-01-01

    Thin film and bulk, sulfonated poly(ether ether ketone) (SPEEK) have been subjected to a thermal treatment at 160–250 °C for up to 15 h. Exposing the films to 160 °C already causes partial desulfonation, and heating to temperatures exceeding 200 °C results in increased conjugation in the material, most likely via a slight cross-linking by H-substitution. It is well-known that the sulfonate proton plays a major role in the desulfonation reactions, and exchanging the protons with other cations ...

  17. Kasvatusteaduslike tööde konkursi tulemused / Ulve Kala

    Index Scriptorium Estoniae

    Kala, Ulve, 1947-

    2002-01-01

    Eesti keeles publitseeritud teadustöö preemia anti Aleksander Elangole, Inger Kraavile ja Kristi Kõivule, diplom Ühiskondlikule Pedagoogika Uurimise Instituudile, Viivi Ekstale, Inger Kraavile, Inge Undile, Viivi Maansole. Võõrkeeles publitseeritud teadustöö preemia monograafiale "Integration als Problem in der Erziehungswissenschaft" (koostaja Airi Liimets, autorid Airi Liimets, Saila Anttonen, Gunnar Bergendal, Gerd-Bodo Reinert von Carlsburg, Helmut Wehr, Tiiu Kuurme, Pauli Siljander, Jüri Kruusvall, Sirje Priimägi, Ene-Silvia Sarv, Kristi Kõiv, Meri-Liis Laherand, Jaan Mikk, Hannele Niemi, Marika Veisson, Irina Würscher, Susanne Jena, Tiina Aunin, Reet Liimets, Heli Mattisen, Aivo Saar, Maie Vikat), diplom Aino Saarele ja Katrin Niglasele. Didaktilis-rakenduslike tööde preemia Eda Heinlale, Estelle Laanele ja Kalle Laanele, Tiiu Kadajasele. Populaarteadusliku töö preemia Maie Tuulikule, diplom Kristi Kõivule. H. Liimetsa nim magistritööde preemia Rain Mikserile, Margus Pedastele, Ülle Rannutile, Inger Kraavile, Tago Sarapuule, Martin Ehalale

  18. Electrolytic Hydrogen obtaining by a photovoltaic source

    International Nuclear Information System (INIS)

    Pasculete, E.; Condrea, F.; Stanoiu, L.

    2005-01-01

    At present, the developed countries allocate large funds for the financing of some global programs for fundamental and applicative research for development of hydrogen non-conventional production technologies. One of these technologies is the photo-assisted electrolysis. This technology is adopted in the research, which results are presented in this paper. The experimental model includes as basic equipment 100 W photovoltaic source, electrolysis battery press filter type, control unit of the electric energy discharged, accumulator, hydrogen storage unit. Five types of material have been tested for the electrolysis cell diaphragm: asbestos; Netrom- unwoven material from fibers of polypropylene; ion changing composite membrane - polysulfone support with an active layer of sulfonated poly-sulfone (PSS/PSJ) and poly-sulfone support with an active layer of sulfonated poly-eter cetone (SPEEK/PSf); ion-exchange membrane made from sulfonated poly-eter cetone (SPEEK). The graphics and results from the test system are presented. The analysis of the experimental results lead to the establishment of the optimal configuration of battery and of the operational conditions of the assembly. The experimental results give the opportunity to obtain electrolytic hydrogen with a photovoltaic source, in an efficient system, and promote the Romanian research at a level of a demonstrative installation

  19. Ion-exchange composite membranes pore-filled with sulfonated poly(ether ether ketone) and Engelhard titanosilicate-10 for improved performance of vanadium redox flow batteries

    Science.gov (United States)

    Kim, Jihoon; Lee, Yongkyu; Jeon, Jae-Deok; Kwak, Seung-Yeop

    2018-04-01

    A series of ion-exchange membranes for vanadium redox flow batteries (VRBs) are prepared by filling the pores of a poly(tetrafluoroethylene) (PTFE) substrate with sulfonated poly(ether ether ketone) (SPEEK) and microporous Engelhard titanosilicate-10 (ETS-10). The effects of ETS-10 incorporation and PTFE reinforcement on membrane properties and VRB single-cell performance are investigated using various characterization tools. The results show that these composite membranes exhibit improved mechanical properties and reduced vanadium-ion permeabilities owing to the interactions between ETS-10 and SPEEK, the suppressed swelling of PTFE, and the unique ETS-10 framework. The composite membrane with 3 wt% ETS-10 (referred to as "SE3/P") exhibits the best membrane properties and highest ion selectivity. The VRB system with the SE3/P membrane exhibits higher cell capacity, higher cell efficiency, and lower capacity decay than that with a Nafion membrane. These results indicate that this composite membrane has potential as an alternative to Nafion in VRB systems.

  20. Narva linnuse arhitektuurivõistlus ja selle ülesanne / Toomas Paaver

    Index Scriptorium Estoniae

    Paaver, Toomas, 1976-

    2015-01-01

    SA Narva Muuseum korraldas arhitektuurivõistluse, et leida terviklik ruumiline lahendus Narva linnuse hoonete ja territooriumi ümberehituseks. Esimese koha sai töö märgusõnaga "Kaks sõpra" (Kalle Vellevoog, Tiiu Truus, Lidia Zarudnaja ja Martin Prommik arhitektuuribüroost JVR). Teise koha sai töö märgusõnaga "Ulm" (Jaan Kuusemets, Üllar Ambos, Pille Noole, Kaisa Lasner ja Ionnais Lykouras arhitektuuribüroost DAGOpen ja LÜNK Arhitektid"). Kolmanda koha sai töö märgusõnaga "Aedificium" (Ott Kadarik, Mihkel Tüür, Kristi Tuurmann, Kadri Tamme, Marleen Stokkeby, Viktoria Andrejeva, Constantin Rybkin ja Tanel Trepp arhitektuuribüroost KTA - Kadarik Tüür Arhitektid)

  1. Space and time resolved measurements of ion temperature with the CVI 5292 A charge exchange recombination line after subtracting background radiation

    International Nuclear Information System (INIS)

    Ida, K.; Hidekuma, S.

    1988-08-01

    An ion temperature profile has been obtained with the CVI 5292 A (n = 8 - 7) charge exchange recombination (CXR) line using a space and wave-length resolving visible spectrometer installed on the JIPP TII-U tokamak. Two sets of 50 channels optical fiber arrays: one viewing a fast neutral hydrogen beam (CXR channels) and the other viewing off the neutral beam line (background channels), is arranged on the entrance slit of the spectrometer. This spectrometer is coupled to an image intensifier and CCD detector at the focal plane and provides temperature profile every 1/60 second. An ion temperature is derived from the Doppler broadened line profile after subtracting the simultaneously measured cold component (background channels), which is due to electron-excitation and/or charge exchange recombination in the plasma periphery. Alternative approach to obtain the ion temperature profile without CXR is also demonstrated. This method is based on an Abel inversion technique for each wavelength separately. (author)

  2. An algorithm to remove fringe jumps and its application to microwave reflectometry

    International Nuclear Information System (INIS)

    Ejiri, A.; Kawahata, K.; Shinohara, K.

    1997-01-01

    In some plasma discharges, the phase measured by microwave reflectometry has many fringe (2π radians) jumps. A new algorithm to detect and remove fringe jumps has been developed, and applied to the data in the JIPP TII-U tokamak. Using this algorithm, quantitative properties of fringe jumps, and their effects on the analysis of phase fluctuations are investigated. It was found that the occurrence of fringe jumps obeys a Poisson process, and the time scale of jumps is distributed over a wide range. Fringe jumps affect mainly the low-frequency components of phase fluctuations. Comparison of the phase corrected by the algorithm and the phase calculated from the time smoothed signals indicates that time smoothing (or frequency filtering) is an effective way to obtain information concerning the macroscopic density profile. Fringe jump and phase runaway can be phenomenologically explained by the distribution of the complex amplitude of the reflected wave. (author)

  3. Kunstisuvi 2008, esimene osa / Andri Ksenofontov

    Index Scriptorium Estoniae

    Ksenofontov, Andri, 1962-

    2008-01-01

    Eesti Maalikunstnike Liidu aastanäitused: Mara Koppel-Ljutjuki ja Toomas Tõnissoo kureeritud "Perfektne ring" ArtDepoo galeriis, Tiiu Talvistu ja Mare Joonsalu kureeritud "Äratus" Rotermanni soolalaos. Mart Lepa ja Rene Kuulmanni kogudest avatud näitus "Kirg ja valu" Tartu Kunstimuuseumis. Ilmar Kruusamäe näitus "30 aastat hiljem" Tampere majas. Tartu Ülikooli maaliosakonna lõputööde väljapanekud Tartu Kunstimaja monumentaalgaleriis (Eda Lõhmus), Athena keskuses (Natali Pahapill) ja Tartu Kunstimuuseumis (Maria Ader, Riho Pärn, Katrin Paomets). Vaal-galerii korraldatud rändnäitus "Sinimustvalge eesti kunstis" Tartu Kunstimajas. Ernö Kochi näitus Haus galeriis. Maret Olveti näitus Vabaduse ja SEBi galeriis. Vive Tolli juubelinäitused Tallinna Kunstihoone galeriis ja Eesti Lastekirjanduse Keskuses

  4. Investigation of Novel Electrolytes for Use in Lithium-Ion Batteries and Direct Methanol Fuel Cells

    Science.gov (United States)

    Pilar, Kartik

    Energy storage and conversion plays a critical role in the efficient use of available energy and is crucial for the utilization of renewable energy sources. To achieve maximum efficiency of renewable energy sources, improvements to energy storage materials must be developed. In this work, novel electrolytes for secondary batteries and fuel cells have been studied using nuclear magnetic resonance and high pressure x-ray scattering techniques to form a better understanding of dynamic and structural properties of these materials. Ionic liquids have been studied due to their potential as a safer alternative to organic solvent-based electrolytes in lithium-ion batteries and composite sulfonated polyetheretherketone (sPEEK) membranes have been investigated for their potential use as a proton exchange membrane electrolyte in direct methanol fuel cells. The characterization of these novel electrolytes is a step towards the development of the next generation of improved energy storage and energy conversion devices.

  5. Stabilized Sulfonated Aromatic Polymers by in situ Solvothermal Cross-Linking

    Energy Technology Data Exchange (ETDEWEB)

    Di Vona, Maria Luisa, E-mail: divona@uniroma2.it; Sgreccia, Emanuela [Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, Rome (Italy); Narducci, Riccardo; Pasquini, Luca [Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, Rome (Italy); MAtériaux Divisés, Interfaces, Réactivité, ELectrochimie (MADIREL – UMR 7246), Aix Marseille Université, Marseille (France); Hou, Hongying [Faculty of Material and Engineering, Kunming University of Science and Technology, Kunming (China); Knauth, Philippe [MAtériaux Divisés, Interfaces, Réactivité, ELectrochimie (MADIREL – UMR 7246), Aix Marseille Université, Marseille (France)

    2014-10-10

    The cross-link reaction via sulfone bridges of sulfonated polyether ether ketone (SPEEK) by thermal treatment at 180°C in presence of dimethylsulfoxide is discussed. The modifications of properties subsequent to the cross-linking are presented. The mechanical strength as well as the hydrolytic stability increased with the thermal treatment time, i.e., with the degree of cross-linking. The proton conductivity was determined as function of temperature, IEC, degree of cross-linking, and hydration number. The memory effect, which is the membrane ability to “remember” the water uptake reached at high temperature also at lower temperature, is exploited in order to achieve high values of conductivity. Membranes swelled at 110°C can reach a conductivity of 0.14 S/cm at 80°C with a hydration number (λ) of 73.

  6. Influence of Pyrolysis Parameters on the Performance of CMSM

    Directory of Open Access Journals (Sweden)

    Marta C. Campo

    2009-01-01

    Full Text Available Carbon hollow fiber membranes have been prepared by pyrolysis of a P84/S-PEEK blend. Proximate analysis of the precursor was performed using thermogravimetry (TGA, and a carbon yield of approximately 40% can be obtained. This study aimed at understanding the influence of pyrolysis parameters—end temperature, quenching effect, and soaking time—on the membrane properties. Permeation experiments were performed with N2, He, and CO2. Scanning electron microscopy (SEM has been done for all carbon hollow fibers. The highest permeances were obtained for the membrane submitted to an end temperature of 750°C and the highest ideal selectivities for an end temperature of 700°C. In both cases, the membranes were quenched to room temperature.

  7. Development of solid electrolytes for water electrolysis at intermediate temperatures. Task 3 report; Annual report

    Energy Technology Data Exchange (ETDEWEB)

    Linkous, C.A.; Anderson, R.; Kopitzke, R.W.

    1995-12-01

    This project is an attempt to synthesize and fabricate proton exchange membranes for hydrogen production via water electrolysis that can take advantage of the better kinetic and thermodynamic conditions that exist at higher temperatures. Current PEM technology is limited to the 125--150 C range. Based on previous work evaluating thermohydrolytic stability, some 5 families of polymers were chosen as viable candidates: polyether ketones, polyether sulfones, fluorinated polyimides, polybenzimidazoles, and polyphenyl quinoxalines. Several of these have been converted into ionomers via sulfonation and fashioned into membranes for evaluation. In particular, the sulfonated polyetheretherketone, or SPEEK, was tested for water uptake, thermo-conductimetric analysis, and performance as the solid electrolyte material in an electrolysis cell. Results comparable to commercial perfluorocarbon sulfonates were obtained.

  8. Influence of Silica/Sulfonated Polyether-Ether Ketone as Polymer Electrolyte Membrane for Hydrogen Fueled Proton Exchange Membrane Fuel Cells

    Directory of Open Access Journals (Sweden)

    Sri Handayani

    2011-12-01

    Full Text Available The operation of non-humidified condition of proton exchange membrane fuel cell (PEMFC using composite sPEEK-silica membrane is reported. Sulfonated membrane of PEEK is known as hydrocarbon polyelectrolyte membrane for PEMFC and direct methanol fuel cell (DMFC. The state of the art of fuel cells is based on the perluorosulfonic acid membrane (Nafion. Nafion has been the most used in both PEMFC and DMFC due to good performance although in low humidified condition showed poor current density. Here we reported the effect of silica in hydrocarbon sPEEK membrane that contributes for a better water management system inside the cell, and showed 0.16 W/cm2 of power density which is 78% higher than that of non-silica modified [Keywords: composite membrane, polyether-ether ketone, silica, proton exchange membrane fuel cell].

  9. Cross-linked sulfonated aromatic ionomers via SO2 bridges: Conductivity properties

    Science.gov (United States)

    Di Vona, M. L.; Pasquini, L.; Narducci, R.; Pelzer, K.; Donnadio, A.; Casciola, M.; Knauth, P.

    2013-12-01

    The proton conductivity of SPEEK membranes in situ cross-linked by thermal treatment at 180 °C for various times was investigated by impedance spectroscopy. The conductivity measurements were made on fully humidified membranes between 25 and 65 °C and on membranes exposed to different relative humidity between 80 and 140 °C. The Ionic Exchange Capacity (IEC) was determined by acid-base titration and the water uptake by gravimetry. The proton conductivity was determined as function of temperature, IEC, degree of cross-linking and hydration number. A curve of proton conductivity vs. hydration number allows predicting that in order to reach a value of 0.1 S/cm at 100 °C a hydration number above 20 is necessary. The measured conductivity at this temperature is 0.16 S/cm for a hydration number of 60.

  10. Analysis and optimization of a proton exchange membrane fuel cell using modeling techniques

    International Nuclear Information System (INIS)

    Torre Valdés, Ing. Raciel de la; García Parra, MSc. Lázaro Roger; González Rodríguez, MSc. Daniel

    2015-01-01

    This paper proposes a three-dimensional, non-isothermal and steady-state model of Proton Exchange Membrane Fuel Cell using Computational Fluid Dynamic techniques, specifically ANSYS FLUENT 14.5. It's considered multicomponent diffusion and two-phasic flow. The model was compared with experimental published data and with another model. The operation parameters: reactants pressure and temperature, gases flow direction, gas diffusion layer and catalyst layer porosity, reactants humidification and oxygen concentration are analyzed. The model allows the fuel cell design optimization taking in consideration the channels dimensions, the channels length and the membrane thickness. Furthermore, fuel cell performance is analyzed working with SPEEK membrane, an alternative electrolyte to Nafion. In order to carry on membrane material study, it's necessary to modify the expression that describes the electrolyte ionic conductivity. It's found that the device performance has got a great sensibility to pressure, temperature, reactant humidification and oxygen concentration variations. (author)

  11. Stabilized sulfonated aromatic polymers by in situ solvothermal cross-linking

    Directory of Open Access Journals (Sweden)

    Maria Luisa eDi Vona

    2014-10-01

    Full Text Available The cross-link reaction via sulfone bridges of sulfonated polyetheretherketone (SPEEK by thermal treatment at 180 °C in presence of dimethylsulfoxide (DMSO is discussed. The modifications of properties subsequent to the cross-linking are presented. The mechanical strength as well as the hydrolytic stability increased with the thermal treatment time, i.e., with the degree of cross-linking. The proton conductivity was determined as function of temperature, IEC, degree of cross-linking and hydration number. The memory effect, which is the membrane ability to remember the water uptake reached at high temperature also at lower temperature, is exploited in order to achieve high values of conductivity. Membranes swelled at 110 °C can reach a conductivity of 0.14 S/cm at 80°C with a hydration number ( of 73.

  12. Science and history explored by nuclear magnetic resonance

    International Nuclear Information System (INIS)

    Baias, Maria Antoaneta

    2009-01-01

    Nuclear Magnetic Resonance was chosen as the main tool for investigating different biological and chemical systems, as it is unique in providing the information details about the morphology and molecular structures and conformations by which the fundamental properties of these biological and chemical systems can be understood. Proton spin-diffusion experiments combined with 13 C CPMAS spectroscopy were successfully applied to characterize the changes that occur during the thermal denaturation of keratin fibers from wool and hair. A model describing both the effect of thermal denaturation and the effect of different chemical treatments on keratin fibers is presented. Proton NMR spectroscopy was used for studying the proton exchange in Sulfonated Polyether Ether Ketone proton exchange membranes revealing that the water exchange processes in hydrated SPEEK-silica membranes are more efficient when low concentrations of polyethoxysiloxane (PEOS) are used for the membrane preparation. Proton 1D exchange spectroscopy combined with transverse relaxation measurements offered good insight in the state of water in hydrated SPEEK/SiO 2 membranes revealing that concentrations of 5%-10% wt. PEOS could enhance the electrical conductivity of PEM. Hyperpolarized 129 Xe NMR spectroscopy was successfully applied for monitoring the free radical polymerization reactions of methyl methacrylate, methyl acrylate and the copolymerization of methyl methacrylate and methyl acrylate. The observation of Xe chemical shift and linewidths during the reactions reveal information about the polymer chain growths during the polymerizations. The successful application of the NMR-MOUSE to visualise the different anatomical layers with varying proton densities opens the possibility of its use in clinical studies such as osteoporosis for bone density measurements. The NMR-MOUSE was also successfully applied for the analysis of violins and bows and a classification of the violins and bows as a function of

  13. Degradation mechanisms of sulfonated poly-aromatic membranes in fuel cell

    International Nuclear Information System (INIS)

    Perrot, C.

    2006-11-01

    Fuel cell development requires an improvement in the electrode-membrane assembly durability which depends on both the polymer used and the fuel cell operating conditions. The origin of the degradation can be either electrochemical, chemical and/or mechanical. This study deals with the understanding of alternative membranes ageing mechanisms, i.e. non fluorinated membranes, such as sPEEK and sPI. For this kind of membranes, the first process is chemical. Understanding these mechanisms is the first essential step to develop more stable structures. An original approach is developed to overcome the analytical difficulties encountered with polymers. It consists in studying the degradation mechanism on model structures. Ageing are carried out in water, with H 2 O 2 in some cases (identified as a cause of membrane chemical ageing in the fuel cell system), and at different temperatures. The approach consists in separating the different products formed by chromatography. Then they are identified (NMR, IR, MS) and quantified. This method allows us to establish the ageing mechanism. We show that the ageing of a sPEEK structure mainly results from an attack by end chains which spreads to the whole. This mechanism is confirmed on ex-situ and in-situ aged membranes. These two kinds of ageing lead to an important decrease in polymerisation degree (determined by SEC). Formation of the same degradation products is observed. In fuel cells, a heterogeneous degradation is noticed. It takes place mainly on the cathode side. sPI are known for their high sensitivity to hydrolysis. Nevertheless, we highlight a limited degradation at 80 Celsius degrees due to the recombination of hydrolyzed species at this temperature. (author)

  14. Degradation mechanisms of sulfonated poly-aromatic membranes in fuel cell; Mecanismes de degradation des membranes polyaromatiques sulfonees en pile a combustible

    Energy Technology Data Exchange (ETDEWEB)

    Perrot, C

    2006-11-15

    Fuel cell development requires an improvement in the electrode-membrane assembly durability which depends on both the polymer used and the fuel cell operating conditions. The origin of the degradation can be either electrochemical, chemical and/or mechanical. This study deals with the understanding of alternative membranes ageing mechanisms, i.e. non fluorinated membranes, such as sPEEK and sPI. For this kind of membranes, the first process is chemical. Understanding these mechanisms is the first essential step to develop more stable structures. An original approach is developed to overcome the analytical difficulties encountered with polymers. It consists in studying the degradation mechanism on model structures. Ageing are carried out in water, with H{sub 2}O{sub 2} in some cases (identified as a cause of membrane chemical ageing in the fuel cell system), and at different temperatures. The approach consists in separating the different products formed by chromatography. Then they are identified (NMR, IR, MS) and quantified. This method allows us to establish the ageing mechanism. We show that the ageing of a sPEEK structure mainly results from an attack by end chains which spreads to the whole. This mechanism is confirmed on ex-situ and in-situ aged membranes. These two kinds of ageing lead to an important decrease in polymerisation degree (determined by SEC). Formation of the same degradation products is observed. In fuel cells, a heterogeneous degradation is noticed. It takes place mainly on the cathode side. sPI are known for their high sensitivity to hydrolysis. Nevertheless, we highlight a limited degradation at 80 Celsius degrees due to the recombination of hydrolyzed species at this temperature. (author)

  15. Análisis y optimización de una celda de combustible de membrana de intercambio protónico; Analysis and optimization of a proton exchange membrane fuel cell using modeling techniques

    Directory of Open Access Journals (Sweden)

    Raciel de la Torre Valdés

    2015-04-01

    Full Text Available En el presente trabajo se realizó la modelación tridimensional y estacionaria de una celda de combustible de intercambio protónico empleando técnicas de modelación de dinámica de fluidos computacional, específicamente el software ANSYS FLUENT 14.5. El modelo fue comparado con datos experimentales y con resultados de otro modelo. Se analizaron los parámetros de operación del dispositivo presión y temperatura, sentido de los flujos, porosidad de los electrodos, humidificación de los gases y concentración de oxígeno. Se optimizó el diseño de la celda teniendo en cuenta las dimensiones de los canales y el espesor de la membrana. Se analizó el rendimiento de la celda funcionando con la membrana SPEEK (por sus siglas en inglés. Para realizar este estudio fue necesario modificar la expresión que describe la conductividad iónica. Se encontró que el rendimiento del dispositivo tiene gran sensibilidad a la variación de los parámetros termodinámicos y la composición de los gases. This paper proposes a three-dimensional, non-isothermal and steady-state model of Proton Exchange Membrane Fuel Cell using Computational Fluid Dynamic techniques, specifically ANSYS FLUENT 14.5. It's considered multicomponent diffusion and two-phasic flow. The model was compared with experimental published data and with another model. The operation parameters: reactants pressure and temperature, gases flow direction, gas diffusion layer and catalyst layer porosity, reactants humidification and oxygen concentration are analyzed. The model allows the fuel cell design optimization taking in consideration the channels dimensions, the channels length and the membrane thickness. Furthermore, fuel cell performance is analyzed working with SPEEK membrane, an alternative electrolyte to Nafion. In order to carry on membrane material study, it’s necessary to modify the expression that describes the electrolyte ionic conductivity. It’s found that the device

  16. Development of an imaging VUV monochromator in normal incidence region

    Energy Technology Data Exchange (ETDEWEB)

    Koog, Joong-San

    1996-07-01

    This paper describes a development of the two-dimensional imaging monochromator system. A commercial normal incidence monochromator working on off-Rowland circle mounting is used for this purpose. The imaging is achieved with utilizing the pinhole camera effect created by an entrance slit of limited height. The astigmatism in the normal incidence mounting is small compared with a grazing incidence mount, but has a finite value. The point is that for near normal incidence, the vertical focusing with a concave grating is produced at outside across the exit slit. Therefore, by putting a 2-D detector at the position away from the exit slit ({approx}30 cm), a one-to-one correspondence between the position of a point on the detector and where it originated in the source is accomplished. This paper consists of (1) the principle and development of the imaging monochromator using the off-Rowland mounting, including the 2-D detector system, (2) a computer simulation by ray tracing for investigations of the imaging properties of imaging system, and aberration from the spherical concave grating on the exit slit, (3) the plasma light source (TPD-S) for the test experiments, (4) Performances of the imaging monochromator system on the spatial resolution and sensitivity, and (5) the use of this system for diagnostic studies on the JIPP T-IIU tokamak. (J.P.N.)

  17. Mirror confinement systems: Final technical report

    International Nuclear Information System (INIS)

    1988-08-01

    This report contains: (1) A discussion of azimuthal asymmetrics and fluctuations in RFC-XX-M. Both lead to enhanced radial transport in RFC-XX-M, and presumably most other tandem mirror machines as well; A report on four operating modes of RFC-XX-M which were developed and studied as part of the collaboration. These operating modes were the simple tandem mode, the negative (floating) potential mode, the hot electron mode, and the ECH (electron cyclotron heating) mode; A pulsed rf heated discharge cleaning system which was developed for RFC-XX-M. This method of cleaning proved much more effective than normal glow discharge cleaning, and variations of it are currently in use on the GAMMA-10 tandem mirror and the JIPP TII-U tokamak at the Institute for Plasma Physics at Nagoya; Short descriptions of the diagnostics development and improvement done in conjunction with the work on RFC-XX-M; and a compilation of the work performed at the University of Tsukuba on GAMMA-10. Most of the effort on GAMMA-10 involved diagnostics development and improvement. 16 refs., 42 figs., 1 tab

  18. Uued raamatud

    Index Scriptorium Estoniae

    2005-01-01

    Constructed happiness - domestic environment in the cold war era / Võistlevad õnned - elukeskkond külma sõja perioodil (EKA, 2005; toimetajad Mart Kalm, Ingrid Ruudi, kujundajad Martin Lazarev, Tiit Lepp, Andrus Kõresaar); Ruumipilt : Eesti parimad interjöörid ja disain : konkurss 2004 / Eesti Sisearhitektide Liit (Minuskel, 2005; projektijuht Mati Veermets, kujundaja Tiiu Prisko, tekstid: Ell-Maaja Randküla); Eesti Kunstiakadeemia ajakirja 1. number (toimetajad Karolin Kuusik, Kristina Paju, kujundajad Kadri-Maria Mitt, Tuuli Aule, fotod: Tatjana Muravskaja); Eesti Kunstiakadeemia lõputööd 2005 (EKA, 2005; koostajad Karin Laansoo, Alo Paistik, kujundajad T. Aule, K.-M. Mitt, fotograafid Pelle Kalmo, Riikka Tauriainen, Anu Vahtra); Hallas-Murula, Karin. Suurlinn Tallinn : Eliel Saarineni "Suur-Tallinna" projekt. 1913 (Eesti Arhitektuurimuuseum, 2005; kujundaja Tiit Jürna); Kivi, Raul-Levroit. Tartu planeerimisest ja arhitektuurist : artikleid ja mälestusi (Eesti Arhitektuurimuuseum, 2005; koostajad Jaan Malin, K. Hallas-Murula); Arhitektuuriaasta 2004 : arhitektuuripreemiate nominendid (Solnessi Arhitektuurikirjastus, 2005; tekst: Epp Lankots, kujundaja Arhitektuuri Domeen); Archiprix International 2005 : world's best graduation projects (Rotterdam, 2005; EKA lõpetanud arhitektidest on publitseeritud Ralf Lõokese magistritöö "Superrand")

  19. In memoriam 2003

    Index Scriptorium Estoniae

    2004-01-01

    Maailmas: Lynn Chadwick (24. XI 1914-25. IV), Eila Hiltunen (22. XI 1922-10. X), Leni Riefenstahl (22. VIII 1902-8. IX); Eesti: Paul Allik (23. XII 1946-14. XII), Tiiu Aru (14. X 1938-4. XII), Olga Bruns (19. III 1929-21. XII), Paula Delacherie-Ilves (7. IV 1903-2. IX), Tamara Ditman (9. VIII 1945-4. VIII), Ole Ehelaid (1. V 1913-2. IX), Mart-Ivo Eller (24. VII 1936-18. XI), Ene Falkenberg (2. XI 1914-10. III), Valve Janov (31. I 1921-18. IX), Aino Järvesoo (23. IX 1910-2. II), Lea Jürisson (31. X 1927-30. VIII), Ella Külv (1. XI 1921-31. VII), Tõnis Liik (1. XI 1923-25. I), Ella Loodma (27. II 1926-9. VI), Külli Muna (17. I 1960-8. I), Maire Männik (1. IV 1922-5. IX), Aleksei Paivel (30. III 1929-15. IX), Aino Põldra (1. VIII 1923-5. III), Made Põlluaas (13. VI 1929-15. X), Aleksander Suuman (25. IV 1927-19. VI), Walter Zapp (4. IX 1905-17. VII), Andres Tambek (7. VII 1952-12. V), Isi Trapido (27. IX 1921-28. XI), Ants Erik Vomm (4. VI 1931-11. VIII)

  20. Development of an imaging VUV monochromator in normal incidence region

    International Nuclear Information System (INIS)

    Koog, Joong-San.

    1996-07-01

    This paper describes a development of the two-dimensional imaging monochromator system. A commercial normal incidence monochromator working on off-Rowland circle mounting is used for this purpose. The imaging is achieved with utilizing the pinhole camera effect created by an entrance slit of limited height. The astigmatism in the normal incidence mounting is small compared with a grazing incidence mount, but has a finite value. The point is that for near normal incidence, the vertical focusing with a concave grating is produced at outside across the exit slit. Therefore, by putting a 2-D detector at the position away from the exit slit (∼30 cm), a one-to-one correspondence between the position of a point on the detector and where it originated in the source is accomplished. This paper consists of 1) the principle and development of the imaging monochromator using the off-Rowland mounting, including the 2-D detector system, 2) a computer simulation by ray tracing for investigations of the imaging properties of imaging system, and aberration from the spherical concave grating on the exit slit, 3) the plasma light source (TPD-S) for the test experiments, 4) Performances of the imaging monochromator system on the spatial resolution and sensitivity, and 5) the use of this system for diagnostic studies on the JIPP T-IIU tokamak. (J.P.N.)

  1. A Review on the Fabrication of Electro spun Polymer Electrolyte Membrane for Direct Methanol Fuel Cell

    International Nuclear Information System (INIS)

    Junoh, H.; Jaafar, J.; Norddin, M.N.A.M.; Ismail, A.F.; Othman, M.H.D.; Rahman, M.A.; Yusof, N.; Salleh, W.N.W.; Junoh, H.; Jaafar, J.; Norddin, M.N.A.M.; Ismail, A.F.; Othman, M.H.D.; Rahman, M.A.; Yusof, N.; Salleh, W.N.W.; Hamid Ilbeygi, H.

    2014-01-01

    Proton exchange membrane (PEM) is an electrolyte which behaves as important indicator for fuel cell’s performance. Research and development (R and D) on fabrication of desirable PEM have burgeoned year by year, especially for direct methanol fuel cell (DMFC). However, most of the R and Ds only focus on the parent polymer electrolyte rather than polymer inorganic composites. This might be due to the difficulties faced in producing good dispersion of inorganic filler within the polymer matrix, which would consequently reduce the DMFC’s performance. Electro spinning is a promising technique to cater for this arising problem owing to its more widespread dispersion of inorganic filler within the polymer matrix, which can reduce the size of the filler up to nano scale. There has been a huge development on fabricating electrolyte nano composite membrane, regardless of the effect of electro spun nano composite membrane on the fuel cell’s performance. In this present paper, issues regarding the R and D on electro spun sulfonated poly (ether ether ketone) (SPEEK)/inorganic nano composite fiber are addressed.

  2. Intermatrix Synthesis as a rapid, inexpensive and reproducible methodology for the in situ functionalization of nanostructured surfaces with quantum dots

    Energy Technology Data Exchange (ETDEWEB)

    Bastos-Arrieta, Julio, E-mail: julio.bastos@upc.edu [Department of Chemical Engineering, Universitat Politècnica de Catalunya, Av. Diagonal 647, 08028 Barcelona (Spain); Department of Chemistry, Universitat Autònoma de Barcelona, 08193 Barcelona (Spain); Muñoz, Jose, E-mail: josemaria.munoz@uab.cat [Department of Chemistry, Universitat Autònoma de Barcelona, 08193 Barcelona (Spain); Stenbock-Fermor, Anja, E-mail: stenbock@dwi.rwth-aachen.de [DWI – Leibniz-Institut für Interaktive Materialien, Aachen 52056 (Germany); Muñoz, Maria, E-mail: Maria.Munoz@uab.cat [Department of Chemistry, Universitat Autònoma de Barcelona, 08193 Barcelona (Spain); Muraviev, Dmitri N., E-mail: Dimitri.Muraviev@uab.es [Department of Chemistry, Universitat Autònoma de Barcelona, 08193 Barcelona (Spain); Céspedes, Francisco, E-mail: francisco.cespedes@uab.cat [Department of Chemistry, Universitat Autònoma de Barcelona, 08193 Barcelona (Spain); Tsarkova, Larisa A., E-mail: tsarkova@dwi.rwth-aachen.de [DWI – Leibniz-Institut für Interaktive Materialien, Aachen 52056 (Germany); Baeza, Mireia, E-mail: MariaDelMar.Baeza@uab.cat [Department of Chemistry, Universitat Autònoma de Barcelona, 08193 Barcelona (Spain)

    2016-04-15

    Graphical abstract: - Highlights: • Nanodiamond functionalization with CdS quantum dots. • Approach for carbon nanotube detection in water samples. • Simple functionalization of thin polymeric nanolayers with quantum dots. - Abstract: Intermatrix Synthesis (IMS) technique has proven to be a valid methodology for the in situ incorporation of quantum dots (QDs) in a wide range of nanostructured surfaces for the preparation of advanced hybrid-nanomaterials. In this sense, this communication reports the recent advances in the application of IMS for the synthesis of CdS-QDs with favourable distribution on sulfonated polyetherether ketone (SPEEK) membrane thin films (TFs), multiwall carbon nanotubes (MWCNTs) and nanodiamonds (NDs). The synthetic route takes advantage of the ion exchange functionality of the reactive surfaces for the loading of the QDs precursor and consequent QDs appearance by precipitation. The benefits of such modified nanomaterials were studied using CdS-QDs@MWCNTs hybrid-nanomaterials. CdS-QDs@MWCNTs has been used as conducting filler for the preparation of electrochemical nanocomposite sensors, which present electrocatalytic properties. Finally, the optical properties of the QDs contained on MWCNTs could allow a new procedure for the analytical detection of nanostructured carbon allotropes in water.

  3. All solid supercapacitor based on polyaniline and crosslinked sulfonated poly[ether ether ketone

    International Nuclear Information System (INIS)

    Sivaraman, P.; Kushwaha, R.K.; Shashidhara, K.; Hande, V.R.; Thakur, A.P.; Samui, A.B.; Khandpekar, M.M.

    2010-01-01

    All solid supercapacitor based on polyaniline (PANI) and crosslinked sulfonated poly[ether ether ketone] (XSPEEK,) is reported in this paper. The crosslinker used for sulfonated poly[ether ether ketone] (SPEEK) is 1,4-bis(hydroxymethyl) benzene. The XSPEEK is used as both solid electrolyte and separator membrane. Supercapacitors are fabricated using various PANI/XSPEEK weight ratios. These are characterized by cyclic voltammetry and galvanostatic charge-discharge studies. The supercapacitor with PANI/XSPEEK weight ratio 1:0.5, exhibit a specific capacitance of 480 F g -1 of PANI. To the best of authors' knowledge, the value reported here is the highest for a supercapacitor based on a proton conducting solid polymer electrolyte and PANI. Detailed electrochemical impedance spectroscopy analysis is carried out. The analysis shows that the complex capacitance of the supercapacitor depends on the XSPEEK content. The time constant (t 0 ), derived from the imaginary part of complex capacitance decreases with increase in the XSPEEK content in the supercapacitor. Cycle life characteristics of the supercapacitor show a decrease in specific capacitance during initial cycles and get stabilized during later cycles.

  4. Influence of post-casting treatments on sulphonated polyetheretherketone composite membranes

    Energy Technology Data Exchange (ETDEWEB)

    Carbone, Alessandra; Gatto, Irene; Passalacqua, Enza [CNR-ITAE, Institute for Advanced Energy Technologies ' ' N. Giordano' ' Via Salita S. Lucia sopra Contesse, 5 - Messina (Italy); Ohira, Akihiro; Wu, Libin [FC-CUBIC (Polymer Electrolyte Fuel Cell Cutting-Edge Research Center) AIST Tokyo Waterfront, 2-41-6, Aomi, Koto-ku, Tokyo 135-0064 (Japan)

    2010-09-15

    Since the post-casting treatments influence the water entrapped in polymeric matrix and consequently its proton conductivity, an evaluation of annealing at 200 C and acid treatments was conducted on previously developed composite s-PEEK (1.55 mequiv. g{sup -1}) membranes, containing a commercial aminopropyl-functionalised silica. DSC, WAXS, SEM-EDX and laser microscope measurements carried out on membranes swollen at different temperatures highlighted different membrane properties depending on post-casting treatments. It was found that composite membranes have different structural and morphological characteristics than pristine polymer membranes. The silica distribution was modified when different treatments are used. The state of water changed when silica was inserted into the membranes. Actually, contrary to the pristine membranes the presence of freezable water was revealed at temperature lower than 80 C. The proton conductivity was also affected by the presence and the amount of water trapped into the membranes and was particularly influenced by the post-casting treatments. The silica introduction reduced the swelling effect and improved the robustness of the membranes even if a higher water content in the freezable state was observed. Acid treatment leads to significant improvement in membrane properties, but the present work shows that annealing before acid treatment can affect the membrane morphology more strongly than other treatments resulting in a much better fuel cell performance. (author)

  5. Ab Initio Study of Hydration and Proton Dissociation in Ionomer Membranes

    International Nuclear Information System (INIS)

    Idupulapati, Nagesh B.; Devanathan, Ramaswami; Dupuis, Michel

    2010-01-01

    We present a comparative study of proton dissociation in various functional acidic units that are promising candidates as building blocks for polymeric electrolyte membranes. Minimum energy structures for four acidic moieties with clusters of 1-6 water molecules were determined using density functional theory at the B3LYP/6-311G** level starting from chemically rational initial configurations. The perfluoro sulfonyl imide acid group (CF3CF2SO2NHSO2CF3) was observed to be the strongest acid, due to the substantial electron withdrawing effect of both fluorocarbon groups. The hydrophilic functional group (CH3OC6H3OCH3C6H4SO3H) of sulfonated polyetherether ketone (SPEEK) membrane was found to be the strongest base with the acidic proton dissociation requiring the addition of six water molecules and the hydrated proton being more tightly bound to the conjugate base. Even though both perfluoro sulfonyl imides and sulfonic acids (hydrophilic functional groups for sulfonyl imide and Nafion ionomers respectively) required only three water molecules to exhibit spontaneous proton dissociation, the largest possible solvent-separated hydronium ion was attained only for the sulfonyl imide moiety. These results provide a scientific basis for understanding the improved conductivity of perfluorinated sulfonyl imide-based membranes relative to that of the widely-used Nafion membrane.

  6. Intermatrix Synthesis as a rapid, inexpensive and reproducible methodology for the in situ functionalization of nanostructured surfaces with quantum dots

    Science.gov (United States)

    Bastos-Arrieta, Julio; Muñoz, Jose; Stenbock-Fermor, Anja; Muñoz, Maria; Muraviev, Dmitri N.; Céspedes, Francisco; Tsarkova, Larisa A.; Baeza, Mireia

    2016-04-01

    Intermatrix Synthesis (IMS) technique has proven to be a valid methodology for the in situ incorporation of quantum dots (QDs) in a wide range of nanostructured surfaces for the preparation of advanced hybrid-nanomaterials. In this sense, this communication reports the recent advances in the application of IMS for the synthesis of CdS-QDs with favourable distribution on sulfonated polyetherether ketone (SPEEK) membrane thin films (TFs), multiwall carbon nanotubes (MWCNTs) and nanodiamonds (NDs). The synthetic route takes advantage of the ion exchange functionality of the reactive surfaces for the loading of the QDs precursor and consequent QDs appearance by precipitation. The benefits of such modified nanomaterials were studied using CdS-QDs@MWCNTs hybrid-nanomaterials. CdS-QDs@MWCNTs has been used as conducting filler for the preparation of electrochemical nanocomposite sensors, which present electrocatalytic properties. Finally, the optical properties of the QDs contained on MWCNTs could allow a new procedure for the analytical detection of nanostructured carbon allotropes in water.

  7. Intermatrix Synthesis as a rapid, inexpensive and reproducible methodology for the in situ functionalization of nanostructured surfaces with quantum dots

    International Nuclear Information System (INIS)

    Bastos-Arrieta, Julio; Muñoz, Jose; Stenbock-Fermor, Anja; Muñoz, Maria; Muraviev, Dmitri N.; Céspedes, Francisco; Tsarkova, Larisa A.; Baeza, Mireia

    2016-01-01

    Graphical abstract: - Highlights: • Nanodiamond functionalization with CdS quantum dots. • Approach for carbon nanotube detection in water samples. • Simple functionalization of thin polymeric nanolayers with quantum dots. - Abstract: Intermatrix Synthesis (IMS) technique has proven to be a valid methodology for the in situ incorporation of quantum dots (QDs) in a wide range of nanostructured surfaces for the preparation of advanced hybrid-nanomaterials. In this sense, this communication reports the recent advances in the application of IMS for the synthesis of CdS-QDs with favourable distribution on sulfonated polyetherether ketone (SPEEK) membrane thin films (TFs), multiwall carbon nanotubes (MWCNTs) and nanodiamonds (NDs). The synthetic route takes advantage of the ion exchange functionality of the reactive surfaces for the loading of the QDs precursor and consequent QDs appearance by precipitation. The benefits of such modified nanomaterials were studied using CdS-QDs@MWCNTs hybrid-nanomaterials. CdS-QDs@MWCNTs has been used as conducting filler for the preparation of electrochemical nanocomposite sensors, which present electrocatalytic properties. Finally, the optical properties of the QDs contained on MWCNTs could allow a new procedure for the analytical detection of nanostructured carbon allotropes in water.

  8. Ultrathin Sicopion Composite Cation-Exchange Membranes: Characteristics and Electrodialytic Performance following a Conditioning Procedure

    Directory of Open Access Journals (Sweden)

    Erik Ayala-Bribiesca

    2012-01-01

    Full Text Available The aim of this work was to investigate the properties of Sicopion membranes: an ultrathin (≈20 μm composite cation-exchange membrane (CEM made from sulphonated poly(ether-ether-ketone (SPEEK containing different levels of sulphonic-functionalized silica particles (SFSPs. Sicopion membranes were conditioned according to the French Normalization Association procedure, consisting in a series of acid and alkaline washes, and their electrodialytic characteristics were compared to an existent commercial food-grade membrane (CMX-SB. Electrical conductivity of Sicopion membranes was higher than that of CMX-SB membranes (9.92 versus 6.98 mS/cm, as well as their water content (34.0 versus 27.6%. As the SFSP level was reduced, the ion-exchange capacity (IEC of Sicopion membranes increased. Concerning their electrodialytic performances, Sicopion membranes presented a lower demineralization rate than CMX-SB membranes (35.9 versus 45.5%, due to an OH− leakage through the pores created by dislodging the SFSP particles during the conditioning procedure.

  9. International Studies in Africa. Interview with Prof. O. Igho Natufe, Nigeria

    Directory of Open Access Journals (Sweden)

    Dzherri Roulings Tafotie Deffo Jerry Rowllings

    2016-12-01

    Full Text Available O. Igho Natufe is a Nigerian-born Sovietologist and a specialist in International Relations and Soviet/ Russian Foreign Policy. Dr. Natufe is an alumnus of the People's Friendship University, a former university professor of Political Science (University of Ghana, Accra, Ghana, 1978-1980, and the University of Benin, Benin City, Nigeria, 1980-1989 and senior advisor to the Government of Canada (1970-1978, 1989-2011. He is author of several of scientific research, including “Soviet policy in Africa: from Lenin to Brezhnev”. In his interview he speeks about IR studies in Africa, about mutual perceptions of Russians and Africans, about his recent book on Soviet and Russian Foreign Policy, about scramble for Africa between great and emerging powers. He expects Russia, the USA, and China to enhance their influence in Africa, at the expense of Britain and France. Prof. Natufe pays a special attention to the role of African Diaspora in Development of African countries.

  10. A Review on the Fabrication of Electrospun Polymer Electrolyte Membrane for Direct Methanol Fuel Cell

    Directory of Open Access Journals (Sweden)

    Hazlina Junoh

    2015-01-01

    Full Text Available Proton exchange membrane (PEM is an electrolyte which behaves as important indicator for fuel cell’s performance. Research and development (R&D on fabrication of desirable PEM have burgeoned year by year, especially for direct methanol fuel cell (DMFC. However, most of the R&Ds only focus on the parent polymer electrolyte rather than polymer inorganic composites. This might be due to the difficulties faced in producing good dispersion of inorganic filler within the polymer matrix, which would consequently reduce the DMFC’s performance. Electrospinning is a promising technique to cater for this arising problem owing to its more widespread dispersion of inorganic filler within the polymer matrix, which can reduce the size of the filler up to nanoscale. There has been a huge development on fabricating electrolyte nanocomposite membrane, regardless of the effect of electrospun nanocomposite membrane on the fuel cell’s performance. In this present paper, issues regarding the R&D on electrospun sulfonated poly (ether ether ketone (SPEEK/inorganic nanocomposite fiber are addressed.

  11. Influence of bentonite in polymer membranes for effective treatment of car wash effluent to protect the ecosystem.

    Science.gov (United States)

    Kiran, S Aditya; Arthanareeswaran, G; Thuyavan, Y Lukka; Ismail, A F

    2015-11-01

    In this study, modified polyethersulfone (PES) and cellulose acetate (CA) membranes were used in the treatment of car wash effluent using ultrafiltration. Hydrophilic sulfonated poly ether ether ketone (SPEEK) and bentonite as nanoclay were used as additives for the PES and CA membrane modification. Performances of modified membranes were compared with commercial PES membrane with 10kDa molecular weight cut off (MWCO). The influencing parameters like stirrer speed (250-750rpm) and transmembrane pressure (100-600kPa) (TMP) were varied and their effects were studied as a function of flux. In the treatment of car wash effluent, a higher permeate flux of 52.3L/m(2)h was obtained for modified CA membrane at TMP of 400kPa and stirrer speed of 750rpm. In comparison with modified PES membrane and commercial PES membrane, modified CA membranes showed better performance in terms of flux and flux recovery ratio. The highest COD removal (60%) was obtained for modified CA membrane and a lowest COD removal (47%) was observed for commercial PES membrane. The modified membranes were better at removing COD, turbidity and maintained more stable flux than commercial PES membrane, suggesting they will provide better economic performance in car wash effluent reclamation. Copyright © 2015 Elsevier Inc. All rights reserved.

  12. [Medical data security in medico-legal opinioning].

    Science.gov (United States)

    Susło, Robert; Swiatek, Barbara

    2005-01-01

    Medical data security can be approached in medico-legal opinioning in three main situations: security of medical data, on which the opinion should be based, opinioning itself and whether the medical data security was properly ensured and ensuring medical data security during medico-legal opinion giving. The importance of medical data security, during collecting, processing and storing, as well in medical as in legal institutions, is of major importance for the possibility of providing a proper medico-legal opinion. Theoretically speeking, it is possible to give a proper medico-legal opinion using incorrect data, but the possibility is low. When the expert is given improper, unreadable, incomplete or even bogus in part or in the whole medical data it is extremely possible, that he fails in giving his opinion. The term "medical data" was defined and subsequently there was a brief review of medical data storing methods made and specific threats bound with them, based on modern literature. The authors also pointed out possible methods of preventing the threats. They listed Polish as well as international regulations and laws concerning the problem, accenting the importance of preserving medical data for the purposes of medico-legal opinioning.

  13. Smart Materials for Advanced Applications: Self-Decontaminating Polymers, Photofunctional Composites, and Electroconductive Fibers

    Science.gov (United States)

    Little, Brian Kevin

    2011-12-01

    Materials capable of providing multifunctional properties controllable by some external stimulus (pH, light, temperature, etc) are highly desirable and obtainable given recent advancements in material science. Development of these so called "Smart" materials spanned across many disciplines of science with applications in industrial areas such as medical, military, security, and environmental. Furthermore, next-generation materials require the ability to not only sense/respond to changes in their external/internal environment, but process information in regards to these changes and adapt accordingly in a dynamic fashion, autonomously, so called "Intelligent" materials. Findings reported in this manuscript detail the synthesis, characterization, and application of smart materials in the following three areas: (1) self-cleaning polymers (2) photoresponsive composites and (3) electroconductive fibers. Self-Cleaning Polymers: Self-decontaminating polymers are unique materials capable of degrading toxic organic chemicals (TOCs). Barriers composed of or coated with our photochemical reactive polymer matrix could be applied to multiple surfaces for defense against TOCs; for example, military garments for protection against chemical warfare agents. This study investigates conditions necessary for formation of peroxides via O2 reduction induced by long-lived, strongly reducing benzophenyl ketyl (BPK) polymer radicals. Photolysis of aqueous solutions composed of sulphonated poly(ether etherketone), SPEEK, and poly(vinyl alcohol), PVA lead to the formation of the BPK radicals. Experiments investigate the formation and decomposition of peroxides in aqueous solutions of SPEEK/PVA under photolysis. Photofunctional Composites: Photoresponsive nanoporous (PN) films and powders were studied and evaluated as possible additives to sensitize the initiation of CH3NO2 via a mechanism involving coalescence of reaction sites. Such materials consist of a 3-D mesoporous silica framework

  14. Catalytic phosphonation of high performance polymers and POSS. Novel components for polymer blend and nanocomposite fuel cell membranes

    Energy Technology Data Exchange (ETDEWEB)

    Bock, T.R.

    2006-10-15

    Aim of this thesis was the preparation and evaluation of phosphonated high performance (HP) polyelectrolytes and polyhedral oligomeric silsesquioxanes (POSS) for polyelectrolyte membrane fuel cell (PEMFC) application. Brominated derivatives of the commercial high performance (HP) polymers poly(ethersulfone) (PES), poly(etheretherketone) (PEEK), poly(phenylsulfone) (PPSu), poly(sulfone) (PSU) and of octaphenyl-POSS of own production were phosphonated by Ni-catalysed Arbuzov reaction. Phosphonated PSU was cast into pure and blend films with sulfonated PEEK (s-PEEK) to investigate H+-conductivity, water uptake and film morphology. Blend films' properties were referenced to films containing unmodified blend partners. Solution-compounding of phosphonated octaphenyl-POSS and s-PEEK was used to produce novel nanocomposite films. An in-situ zirconisation method was assessed as convenient strategy for novel ionically crosslinked membranes of enhanced swelling resistance. Dibromo isocyanuric acid (DBI) and N-bromo succinimide (NBS) as brominating agents allowed polymer analogous preparation of the novel brominated PES and PEEK with precise reaction control. A random distribution of functional groups, i.e. polyelectrolytes' microstructural homogeneity was revealed as decisive factor concerning solubility of phosphonated PSU. Brominated phT8 was prepared with Br2 by a high temperature approach in tetrachloroethane (TCE). Brominated polymers were phosphonated by Ni-catalysis in non-coordinating high temperature solvents, such as diphenylether, benzophenone and diphenylsulfone without notable solvent influence. The lack of solvent - catalyst complexes and high reaction temperatures of 180-200 C led to halogen-free phosphonates with unprecedented high functionalities. Polymer analogous application of P(OSiMe3)3 offered a novel direct access to easily cleavable disilyl ester derivatives. These were obtained from PEEK and PSU in near quantitative yields at NiCl2-loads as

  15. Behaviour of candidate materials for fusion applications under high surface heat loads

    International Nuclear Information System (INIS)

    Bolt, H.; Nickel, H.; Kuroda, T.; Miyahara, A.

    1988-07-01

    High heat fluxes to in-vessel components of nuclear fusion devices (tokamaks) during normal operation and abnormal operation conditions are one of the governing issues in the selection of a plasma facing material and the design of first wall components. Their failure under high heat loads during service can severely influence the further operability of the entire fusion device. In order to determine the response of candidate materials to high heat fluxes an experimental program was carried out using the 10 MW Neutral Beam Injection Test Stand of the Institute for Plasma Physics of Nagoya University. Metal samples, 13 different fine grain graphites, carbon - carbon composites, and pyrolytic carbon samples were subjected to heat loads between 16 and 117 MW/m 2 and pulse durations of 50 to 950 ms. Afterwards the resulting structural changes as well as threshold values for the occurance of material damage were determined. The main damage observed on carbon materials was cracking in the case of graphites and pyrolytic carbon and erosion in the case of graphites and carbon - carbon composites. Processes leading to such damage were discussed and described in form of models. Parallel to these laboratory experiments numerical analyses of the response of graphite materials to high heat fluxes were carried out. The results are in general agreement with the experimentally determined values. In order to verify the results from experiments and numerical analyses, graphite test limiters were exposed to about 900 discharges in the JIPP T-IIU tokamak. These proof tests fully confirmed the results obtained. (orig.) [de

  16. Data processing with PC-9801 micro-computer for HCN laser scattering experiments

    International Nuclear Information System (INIS)

    Iwasaki, T.; Okajima, S.; Kawahata, K.; Tetsuka, T.; Fujita, J.

    1986-09-01

    In order to process the data of HCN laser scattering experiments, a micro-computer software has been developed and applied to the measurements of density fluctuations in the JIPP T-IIU tokamak plasma. The data processing system consists of a spectrum analyzer, SM-2100A Signal Analyzer (IWATSU ELECTRIC CO., LTD.), PC-9801m3 micro-computer, a CRT-display and a dot-printer. The output signals from the spectrum analyzer are A/D converted, and stored on a mini-floppy-disk equipped to the signal analyzer. The software to process the data is composed of system-programs and several user-programs. The real time data processing is carried out for every shot of plasma at 4 minutes interval by the micro-computer connected with the signal analyzer through a GP-IB interface. The time evolutions of the frequency spectrum of the density fluctuations are displayed on the CRT attached to the micro-computer and printed out on a printer-sheet. In the case of the data processing after experiments, the data stored on the floppy-disk of the signal analyzer are read out by using a floppy-disk unit attached to the micro-computer. After computation with the user-programs, the results, such as monitored signal, frequency spectra, wave number spectra and the time evolutions of the spectrum, are displayed and printed out. In this technical report, the system, the software and the directions for use are described. (author)

  17. Present status of research activities at the national institute for fusion science and its role in international collaboration

    International Nuclear Information System (INIS)

    Fujita, J.

    1997-01-01

    In the National Institute for Fusion Science (NIFS), Japan, a helical magnetic confinement system named Large Helical Device (LHD) is under construction with objective of comprehensive studies of high temperature plasmas in a helical system and investigation of a helical reactor as an alternative approach. Superconducting coils of l = 2, m = 10, major radius R = 3.9 m, produce a steady state helical magnetic field for confinement, together with poloidal coils on LHD. The magnetic field strength on the axis is 3.0 T in the phase I and 4.0 T in the phase II experiment. The plasma major radius in LHD is 3.75 m, and averaged plasma radius is 0.6 m. The plasma will be produced and heated with ECH, and further heated with NBI and ICRF. It is also planned to produced a steady state plasma in LHD. It is expected to have the first plasma in 1998. Small devices such as CHS and others are under operation in the NIFS for supporting the LHD project. The Data and Planning Center of NIFS is collecting, compiling and evaluating atomic and molecular data which are necessary for nuclear fusion research. The talk will include the present status of the construction of LHD, research activities on the development of heating and diagnostic devices for LHD, and experimental results obtained on CHS, JIPP T-IIU and other devices. The role of NIFS on promoting IAEA activities to bridge large scale institutions and small and medium scale laboratories for world-wide collaborations in the field of plasma physics and fusion research will also be introduced, together with an idea of organizing a regional center in Asia. (author)

  18. Investigation on the Characteristics of Pellet Ablation in a Toroidal Plasma

    Science.gov (United States)

    Sato, K. N.; Sakakita, H.; Fujita, H.

    2003-06-01

    Characteristics of a cloud ablated from an ice pellet has been investigated in detail in the JIPP T-IIU tokamak plasma by utilizing a new scheme of pellet injection system, "the injection-angle controllable system". A long "helical tail" of ablation light has been observed using CCD cameras and a high speed framing photograph in the case of on-axis and off-axis injection with the injection angle smaller than a certain value. The direction of the helical tail is found to be independent to that of the total magnetic field lines of the torus. From the experiments with the combination of two toroildal filed directions and two plasma current directions, it is considered that the tail seems to rotate, in most cases, to the electron diamagnetic direction poloidally, and to the opposite to the plasma current direction toroidally. Consideration on various cross sections including charge exchange, ionization and elastic collisions leads us to the conclusion that the tail-shaped phenomena may come from the situation of charge exchange equilibrium of hydrogen ions and neutrals at extremely high density regime in the cloud. The relation of ablation behavior with plasma potential and rotation has also been studied. Potential measurements of pellet-injected plasmas using heavy ion beam probe (HIBP) method were carried out for the first time. In the case of an injection angle to be anti-parallel to the electron diamagnetic direction in the poloidal plane, the result shows that the direction of potential change is negative, and consequently the potential after the injection should be negative because it has been measured to be negative in usual ohmic plasmas without pellet injection. Thus, the direction of the "tail" structure seems to be consistent to that of the plasma potential measured, if it is considered that tail structure may be caused by the effect of the plasma potential and the rotation.

  19. Investigation on the Characteristics of Pellet Ablation in a Toroidal Plasma

    International Nuclear Information System (INIS)

    Sato, K.N.; Sakakita, H.; Fujita, H.

    2003-01-01

    Characteristics of a cloud ablated from an ice pellet has been investigated in detail in the JIPP T-IIU tokamak plasma by utilizing a new scheme of pellet injection system, 'the injection-angle controllable system'. A long 'helical tail' of ablation light has been observed using CCD cameras and a high speed framing photograph in the case of on-axis and off-axis injection with the injection angle smaller than a certain value. The direction of the helical tail is found to be independent to that of the total magnetic field lines of the torus. From the experiments with the combination of two toroidal filed directions and two plasma current directions, it is considered that the tail seems to rotate, in most cases, to the electron diamagnetic direction poloidally, and to the opposite to the plasma current direction toroidally. Consideration on various cross sections including charge exchange, ionization and elastic collisions leads us to the conclusion that the tail-shaped phenomena may come from the situation of charge exchange equilibrium of hydrogen ions and neutrals at extremely high density regime in the cloud. The relation of ablation behavior with plasma potential and rotation has also been studied. Potential measurements of pellet-injected plasmas using heavy ion beam probe (HIBP) method were carried out for the first time. In the case of an injection angle to be anti-parallel to the electron diamagnetic direction in the poloidal plane, the result shows that the direction of potential change is negative, and consequently the potential after the injection should be negative because it has been measured to be negative in usual ohmic plasmas without pellet injection. Thus, the direction of the 'tail' structure seems to be consistent to that of the plasma potential measured, if it is considered that tail structure may be caused by the effect of the plasma potential and the rotation

  20. 212ʻ Fahrenheiti : eesti luule 2006 / Piret Bristol

    Index Scriptorium Estoniae

    Bristol, Piret, 1968-

    2008-01-01

    Järgmistest 2006. a. ilmunud luulekogudest: Ryytle, Indrek. Inglid rokijaamas. Puhja : I. Rüütle ; Runnel, Hando. Viru veri ei värise. Tartu : Ilmamaa ; Vabat, Martin. Mina olengi kirjandusklassik. Tartu : Eesti Kirjanduse Selts ; Korts, Eliina. Lööklaused murravad metsi. Tartu : Eesti Kirjanduse Selts ; Koff, Indrek. Vana laul. Luige : Verb ; Teede, Andra. Takso Tallinna taevas. Luige : Verb ; Vusser, Kaspar. Vusserduste võnked. Tallinn : P. Kukk ; Elbing, Andrus. Siin Beebilõust, tere! : häired pimelinna tänavalt = Ciao, it's Babyface : trouble from the streets of a blind city. Tallinn : Epifanio ; Hint, Miina. Vabaduse vang, ehk, Põrandaalune kirjandus. Tallinn : MR ; Jüriado, Tiiu. Luule on ime. Habaja : Kentaur ; Ligi, Katre. Naabrivalve. Tartu : Ilmamaa ; Krull, Hasso. Talv. Tallinn : Tuum ; Mets, Mae. Pühapäeval on reede. Tartu : Ilmamaa ; Ploom, Ülar. Porr ja sorry. Tallinn : Tuum ; Hirv, Indrek, Surmapõletaja. Tallinn : Tuum ; Piir, Milvi Martina. Kõrkjavaas. Tartu : Fantaasia ; Soomets, Triin. Väljas. Tallinn : Tuum ; Mathura. Kohalolu. Rapla : Allikäärne ; Afanasjev, Vahur. Katedraal Emajões. Tartu ; Brüssel : ID Salong//Sild, Ivar. Spermaga ja puha. Pärnu : Jumalikud Ilmutused ; Meiel, Kaupo. Polügrafisti käsiraamat. Pärnu : Jumalikud Ilmutused ; Kivisildnik, Sven. Vägistatud jäämägi. Pärnu : Jumalikud Ilmutused ; Arder, Ott. Luule sünnib kus sünnib kui sünnib / koost. Leelo Tungal. Tallinn : Tänapäev ; Kompus, Marko. Vallaliste jõgede tõkkejooksja. Tartu : M. Kompus

  1. [The stigmata of St Franics and other Saints charismatics: between miracle and scientific answer].

    Science.gov (United States)

    Muzur, Amir

    2011-01-01

    Departing from the definition of the stigmata as the wounds which, temporarely or permanently, manifest in some cases of extasy following a selected model of suffering (Jesus, Mohammed etc.), the present paper analyzes the phenomenology of stigmatization on several most famous historical and actual examples: Francis of Assisi, as the first stigmatized at all; Catherine of Siena, the only one beside Francis whose stigmata have been recognized by the Church as supernatural; Rita of Cascia (14th c.); Marie de Mörl (1812-1868) from Tirol; the Belgian Louise Lateau (1850-1883); Izabele Hendricks (1844-1874), who died from bleeding; Gemma Galgani (1878-1903), who presented stigmata and the traces of flagellation; the Bavarian Therese Neumann (1898-1962), of whom probabely the most has been written; the popular mendicant father Pio from Pietrelcina (1887-1968); Giulio Massa (b. 1970) from Montecorvino near Salerno, already known as the "Father Pio of the 21st century," who speeks out in Aramaic during extasy; and the first Croatian stigmatized, Zlatko Sudac (b. 1971). Considering some older and more recent interpretations of the stigmata, a more precise definition of that phenomenon is suggested. Acording to it, the stigmata might be considered spontaneous, isolated cases of the localized deautonomization of influence upon superficial blood vessels, mediated by altered consciousness. Pointed out are the potential enormous benefits which medicine might provide by finding out the regularity and methods by which that phenomenon would be initiated in a controlled way, at full consciousness, without external help and at any place on the body.

  2. Dihydrogenimidazole modified silica-sulfonated poly(ether ether ketone) hybrid materials as electrolyte membranes for direct ethanol fuel cells

    International Nuclear Information System (INIS)

    Roelofs, Kimball S.; Hirth, Thomas; Schiestel, Thomas

    2011-01-01

    The present study reports on dihydrogenimidazole modified inorganic-organic mixed matrix membranes for possible application as a proton exchange membrane in direct ethanol fuel cells. The polymeric phase consisted mainly of sulfonated poly(ether ether ketone) (sPEEK) with a sulfonation degree of 55%. The inorganic phase was built up from hydrophilic fumed silica particles interconnected with partially hydrolyzed and condensed tetraethoxysilane with a total inorganic loading of 27.3%. This inorganic phase was further modified with N-(3-triethoxysilylpropyl)-4,5-dihydroimidazole (DHIM), which consists of an hydrolyzable inorganic part and a functional organic group. The influence of the modifier on the mixed matrix system was studied by means of various modifier concentrations in various aqueous-ethanolic systems (water, 2 M and 4 M ethanol). Modifier concentration and ethanol concentration of the ethanol-water mixture exhibited significant but opposite effects on the liquid uptake of the mixed matrix membranes. The proton conductivity as well as the proton diffusion coefficient as a function of modifier content showed a linear decrease. The proton conductivity as a function of temperature showed Arrhenius behavior and the activation energy of the mixed matrix membranes was 43.9 ± 2.6 kJ mol -1 . High selectivity of proton diffusion coefficient to ethanol permeability coefficient was obtained with high modifier concentrations. At low modifier concentrations, this selectivity was dominated by ethanol permeation and at high modifier concentrations by proton diffusion. The main electrolyte properties can be optimized by setting the DHIM content in mixed matrix membrane. With this approach, tailor-made membranes can be prepared for possible application in direct ethanol fuel cells.

  3. Dihydrogenimidazole modified silica-sulfonated poly(ether ether ketone) hybrid materials as electrolyte membranes for direct ethanol fuel cells

    Energy Technology Data Exchange (ETDEWEB)

    Roelofs, Kimball S.; Hirth, Thomas [Fraunhofer Institute for Interfacial Engineering and Biotechnology, Nobelstr. 12, 70569 Stuttgart (Germany); Schiestel, Thomas, E-mail: Thomas.Schiestel@igb.fraunhofer.de [Fraunhofer Institute for Interfacial Engineering and Biotechnology, Nobelstr. 12, 70569 Stuttgart (Germany)

    2011-05-25

    The present study reports on dihydrogenimidazole modified inorganic-organic mixed matrix membranes for possible application as a proton exchange membrane in direct ethanol fuel cells. The polymeric phase consisted mainly of sulfonated poly(ether ether ketone) (sPEEK) with a sulfonation degree of 55%. The inorganic phase was built up from hydrophilic fumed silica particles interconnected with partially hydrolyzed and condensed tetraethoxysilane with a total inorganic loading of 27.3%. This inorganic phase was further modified with N-(3-triethoxysilylpropyl)-4,5-dihydroimidazole (DHIM), which consists of an hydrolyzable inorganic part and a functional organic group. The influence of the modifier on the mixed matrix system was studied by means of various modifier concentrations in various aqueous-ethanolic systems (water, 2 M and 4 M ethanol). Modifier concentration and ethanol concentration of the ethanol-water mixture exhibited significant but opposite effects on the liquid uptake of the mixed matrix membranes. The proton conductivity as well as the proton diffusion coefficient as a function of modifier content showed a linear decrease. The proton conductivity as a function of temperature showed Arrhenius behavior and the activation energy of the mixed matrix membranes was 43.9 {+-} 2.6 kJ mol{sup -1}. High selectivity of proton diffusion coefficient to ethanol permeability coefficient was obtained with high modifier concentrations. At low modifier concentrations, this selectivity was dominated by ethanol permeation and at high modifier concentrations by proton diffusion. The main electrolyte properties can be optimized by setting the DHIM content in mixed matrix membrane. With this approach, tailor-made membranes can be prepared for possible application in direct ethanol fuel cells.

  4. Ethylenediamine-functionalized graphene oxide incorporated acid-base ion exchange membranes for vanadium redox flow battery

    International Nuclear Information System (INIS)

    Liu, Shuai; Li, Dan; Wang, Lihua; Yang, Haijun; Han, Xutong; Liu, Biqian

    2017-01-01

    Highlights: • Ethylenediamine functionalized graphene oxide. • Layered structure of functionalized graphene oxide block vanadium ions crossover. • Protonated N-containing groups suppress vanadium ions permeation. • Ion transport channels are narrowed by electrostatic interactions. • Vanadium crossover decreased due to enhanced Donnan effect and special structure. - Abstract: As a promising large-scale energy storage battery, vanadium redox flow battery (VRFB) is urgently needed to develop cost-effective membranes with excellent performance. Novel acid-base ion exchange membranes (IEMs) are fabricated based on sulfonated poly(ether ether ketone) (SPEEK) matrix and modified graphene oxide (GO) by solution blending. N-based functionalized graphene oxide (GO-NH 2 ) is fabricated by grafting ethylenediamine onto the edge of GO via a facile method. On one hand, the impermeable layered structures effectively block ion transport pathway to restrain vanadium ions crossover. On the other hand, acid-base pairs form between −SO 3 − groups and N-based groups on the edge of GO nanosheets, which not only suppress vanadium ions contamination but also provide a narrow pathway for proton migration. The structure is beneficial for achieving an intrinsic balance between conductivity and permeability. By altering amounts of GO-NH 2 , a sequence of acid-base IEMs are characterized in detail. The single cells assembled with acid-base IEMs show self-discharge time for 160 h, capacity retention 92% after 100 cycle, coulombic efficiency 97.2% and energy efficiency 89.5%. All data indicate that acid-base IEMs have promising prospects for VRFB applications.

  5. Oxidative stress in patients with endodontic pathologies

    Directory of Open Access Journals (Sweden)

    Vengerfeldt V

    2017-08-01

    Full Text Available Veiko Vengerfeldt,1 Reet Mändar,2,3 Mare Saag,1 Anneli Piir,2 Tiiu Kullisaar2 1Institute of Dental Sciences, Faculty of Medicine, University of Tartu, 2Institute of Biomedicine and Translational Medicine, Faculty of Medicine, University of Tartu, 3Competence Centre on Health Technologies, Tartu, Estonia Background: Apical periodontitis (AP is an inflammatory disease affecting periradicular tissues. It is a widespread condition but its etiopathogenetic mechanisms have not been completely elucidated and the current treatment options are not always successful.Purpose: To compare oxidative stress (OxS levels in the saliva and the endodontium (root canal [RC] contents in patients with different endodontic pathologies and in endodontically healthy subjects.Patients and methods: The study group of this comparison study included 22 subjects with primary chronic apical periodontitis (pCAP, 26 with posttreatment or secondary chronic apical periodontitis (sCAP, eight with acute periapical abscess, 13 with irreversible pulpitis, and 17 healthy controls. Resting saliva samples were collected before clinical treatment. Pulp samples (remnants of the pulp, tooth tissue, and/or previous root filling material were collected under strict aseptic conditions using the Hedström file. The samples were frozen to −80°C until analysis. OxS markers (myeloperoxidase [MPO], oxidative stress index [OSI], 8-isoprostanes [8-EPI] were detected in the saliva and the endodontium. Results: The highest MPO and 8-EPI levels were seen in pCAP and pulpitis, while the highest levels of OSI were seen in pCAP and abscess patients, as well as the saliva of sCAP patients. Controls showed the lowest OxS levels in both RC contents and saliva. Significant positive correlations between OxS markers, periapical index, and pain were revealed. Patients with pain had significantly higher OxS levels in both the endodontium (MPO median 27.9 vs 72.6 ng/mg protein, p=0.004; OSI 6.0 vs 10.4, p<0

  6. High-Temperature Shape Memory Polymers

    Science.gov (United States)

    Yoonessi, Mitra; Weiss, Robert A.

    2012-01-01

    physical conformation changes when exposed to an external stimulus, such as a change in temperature. Such materials have a permanent shape, but can be reshaped above a critical temperature and fixed into a temporary shape when cooled under stress to below the critical temperature. When reheated above the critical temperature (Tc, also sometimes called the triggering or switching temperature), the materials revert to the permanent shape. The current innovation involves a chemically treated (sulfonated, carboxylated, phosphonated, or other polar function group), high-temperature, semicrystalline thermoplastic poly(ether ether ketone) (Tg .140 C, Tm = 340 C) mix containing organometallic complexes (Zn++, Li+, or other metal, ammonium, or phosphonium salts), or high-temperature ionic liquids (e.g. hexafluorosilicate salt with 1-propyl-3- methyl imidazolium, Tm = 210 C) to form a network where dipolar or ionic interactions between the polymer and the low-molecular-weight or inorganic compound forms a complex that provides a physical crosslink. Hereafter, these compounds will be referred to as "additives". The polymer is semicrystalline, and the high-melt-point crystals provide a temporary crosslink that acts as a permanent crosslink just so long as the melting temperature is not exceeded. In this example case, the melting point is .340 C, and the shape memory critical temperature is between 150 and 250 C. PEEK is an engineering thermoplastic with a high Young fs modulus, nominally 3.6 GPa. An important aspect of the invention is the control of the PEEK functionalization (in this example, the sulfonation degree), and the thermal properties (i.e. melting point) of the additive, which determines the switching temperature. Because the compound is thermoplastic, it can be formed into the "permanent" shape by conventional plastics processing operations. In addition, the compound may be covalently cross - linked after forming the permanent shape by S-PEEK by applying ionizing

  7. A CONTENT ANALYSIS OF KEYWORD OF THESES IN THE FIELD OF TURKISH EDUCATION AND TEACHING TÜRKÇENİN EĞİTİMİ VE ÖĞRETİMİ ALANINDA YAPILAN YÜKSEK LİSANS TEZLERİNDE GEÇEN ANAHTAR KELİMELERE DÖNÜK BİR İÇERİK ANALİZİ

    Directory of Open Access Journals (Sweden)

    Oğuzhan SEVİM

    2012-01-01

    Full Text Available The purpose of this study is to examine and group thematically keywords in graduate dissertations written in the Turkish education. Meta-analysis method was used in research. The study was carried out on 335 graduate dissertations written between 2005-2010 in the field of Turkish education. The data werw collected from document analysis technique. Keywords listed by researcher was studied to group thematically. As a result of the study, it was understood that not only related to basic language skills but also literature,, teacher competence, children literature, textbook review were studied in the field of Turkish education. Looking at the master’s thesis on the basic language skills, it was seen that studies were concentrated in the field of reading and writing; areas of speeking and listening were neglected. Bu çalışmanın amacı Türkçe eğitimi alanında yazılmış yüksek lisans tezlerinde geçen anahtar kelimeleri incelemek ve tematik olarak gruplandırmaktır. Araştırmada olgubilim deseni kullanılmıştır. Çalışma, 2005-2010 yılları arasında Türkçe Eğitimi alanında yazılmış 335 yüksek lisans tezi üzerinde gerçekleştirilmiştir. Araştırmanın verileri doküman incelemesi tekniğiyle toplanmıştır. Listelenen anahtar kelimeler, tematik olarak gruplandırılmaya çalışılmıştır. Çalışmanın sonucunda Türkçe eğitimi alanında yazılmış olan yüksek lisans tezlerinin yalnızca temel dil becerileriyle ilgili olmadığı; edebiyat, öğretmen yeterliliği, çocuk edebiyatı, ders kitabı incelemesi konularında da çalışıldığı anlaşılmıştır. Temel dil beceriyle ilgili olan yüksek lisans tezlerine bakıldığında çalışmaların okuma ve yazma alanlarında yoğunlaştığı, konuşma ve dinleme alanlarının ise ihmal edildiği görülmüştür.

  8. Pre-treatment of waste fuel with low-speed shredding and screening for fluidized bed incineration; Foerbehandling av avfallsbraensle foer fluidbaeddpannor med laangsamtgaaende valskross och saekerhetssiktning

    Energy Technology Data Exchange (ETDEWEB)

    Hermansson, Sven; Victoren, Anders; Niklasson, Fredrik; Jones, Frida

    2013-09-01

    approximate cost of 104-118 SEK/tonne (12-14 /tonne) treated waste, which is the same as for the larger FB plant shredder system. The cost for the hammer mill system was determined to 155-185 SEK/tonne (18-22 /tonne) treated waste. The higher cost for the hammer mill system rely on the estimated higher maintenance and electricity consumption costs. The analysis of the particle size distribution of the fuel treated with lowspeed shredding and screening shows that the fuel satisfy the demands stipu-lated for combustion in smaller FB furnaces. Furthermore, the combustion trials show no obvious differences in operation quality, compared to the normal hammer milled fuel; no significant differences in level or stability in power, bed temperature or emission levels could be found. Nor was the frequency of spikes of CO of NO{sub x} increased, nor the frequency of violation of the stipulated 24-hrs, halv-hour, or ten-minute stipulated emission limits increased. In summary, the study gives initial support for the thesis that shedding and screening is just as feasible for fuel pre-treatment in smaller FB furnaces with one single fuel supply conveyor as traditional hammer milling systems. Furthermore, it is cheaper. Lowspeed shreddning should, therefore, be concidered as pre-treatment method for both larger as well as smaller FB incineration plants. Beyond the parameters that have been investigated within the scope of this project, availability and safety are important factors that speek for lowspeed shedders. However, these are questions that have to be further investigated.