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George Szekely 한국조형교육학회 1994 造形敎育 Vol.0 No.10

Student`s Sport Survey and Development of Recreational University Sports

( Mozes Szekely ),( Szabolcs Takacs ) 한국체육학회 2015 국제스포츠과학 학술대회 Vol.2015 No.1

The Hungarian University Sports Federation (HUSF), in order to provide a firm ground to its development tasks, has surveyed sport habits and the attitude of university students towards regular physical activity and sports facilities in a research project conducted together with the Eotvos Lorand University of Sciences (ELTE), the National Union of Students in Hungary (H-OK), the education administration and the National Institute of Health Development (OEFI). From the point of view of recreational habits, having a crucial impact on healthy lifestyle, the age-group from 18-23 is of critical importance, and the behaviour of students in higher education is decisive, since in the future they are likely to become a role model for the less educated. The explorative research is based on the results of an online survey of 16.500 students (2011)a and a representative survey of 1500 young adults (aged 18-30) (2013)b. This survey is the first to examine the students` sport habits sport by sport on a weighted data - representing students in higher education by age, institution, educational level and the schedule of the training - providing frequency, level of intensity and the premises of the sport activity as well as the organizational frame of regular sport activity (2015)c. Analysing the questionnaires the students` opinion on sport facilities and its limitations as well as motivating and demotivating factors concerning sport activity can be outlined. According to the first results the percentage of university students whose regular physical activity equals or exceeds the recreational minimum is a mere 23,1% compared to the 46,5% of pupils in secondary education. Despite the fact that the number of students doing regular sport drops to its half after secondary education, 78,8% of university students consider physical activity 2-3 times a week ideal, and more than 85% of them having the opinion that sport facilities are to be provided by the university. The research sheds light on the background of several previous myths, therefore providing answer to whether it is true or not that - students studying sport and health care do more sport than students of the humanities; - regular sport and bad study results ``go hand in hand``; - full-time students do more sport because part-time students have no time for sport; - time to spend on sport decreases year by year, students in their later terms have less time for this; - women and men do different sports and due to different reasons? The overall picture outlined from the answers gives a deep insight not only into the students` sport culture in Hungary but also provides basis for planning intervening actions to change sedentary lifestyle. To promote university sport it is important to pay attention to students` priorities and their distribution in view of the different sports and at the same time segmenting motivating communication by the attitudes and habits of the target group is also of utmost importance.

Using neutron methods SANS and PGAA to study evolution of structure and composition of alkali-doped polybenzimidazole membranes

Babcock, E.,Szekely, N.,Konovalova, A.,Lin, Y.,Appavou, M.-S.,Mangiapia, G.,Revay, Z.,Stieghorst, C.,Holderer, O.,Henkensmeier, D.,Lehnert, W.,Carmo, M. Elsevier 2019 Journal of membrane science Vol.577 No.-

<P><B>Abstract</B></P> <P>Potassium hydroxide (KOH) doped polybenzimidazole (PBI) membranes are investigated as compelling candidates for water electrolysis applications, drastically reducing the ohmic losses in contrast to thick ZrO<SUB>2</SUB> based diaphragms. Using small angle neutron scattering (SANS) we have found that the structure of the (KOH doped) PBI changes with doping time on a minute time scale, and that the development of the structure is highly dependent on the KOH concentration. This data is correlated with macroscopic measurements of membrane swelling resulting from the doping process which also occurs on a minute time scale. Then, using prompt gamma activation analysis (PGAA) to follow the changes in time of the chemical composition, we have found that the K concentration of these samples only increases slightly with doping times after a very rapid initial uptake, reaching a saturation value that is relatively independent of KOH concentration for long doping times of up to 24 h. However measurements of similarly doped samples show increases in ion-conductivity of nearly 3 fold, and resistivity reductions of over 2 fold on the same time scales. These measurements prove that PGAA is a sensitive method to follow changes in the chemical compositions during doping, while SANS can give information on the sub-micro structural changes of polymer electrolyte membranes. Since these methods can be correlated with <I>ex-situ</I> measurements of composition, resistance, ion-conductivity and macro-structure, the combined use of PGAA and SANS provides a promising means for <I>in-operando</I> study in order to elucidate changes in membrane performance due to electrochemical cycling, as well as to help characterize and optimize doping parameters though in-situ doping measurements, by enabling real-time study of such membrane systems.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Elucidating the doping of Alkali-doped Polybenzimidazole membranes. </LI> <LI> Complementary structure and composition information from SANS and PGAA to study functional membranes. </LI> <LI> Structure varies over doping time for KOH doped Polybenzimidazole membranes. </LI> <LI> New possibilities for in-situ and in-operando characterization. </LI> </UL> </P>

Expression and Function of the ultraspiracle(usp) Gene during Development of Drosophila melanogaster

HAYDEN, MELISSA A.,HENRICH, VINCENT C.,BROWN, NEIL E.,SZEKELY, A. ALEX,LEPESANT, JEAN-ANTOINE,GILBERT, LAWRENCE I.,KIM, SE JAE,ANTONIEWSKI, CHRISTOPHE ANTONIEWSKI 濟州大學校 基礎科學硏究所 1995 基礎科學硏究 Vol.8 No.1

The usp locus encodes a member of the nuclear hormone receptor superfamily in Drosophila melanogaster that interacts with EcR(ecdysone receptor) to mediate ecdysteroid-induced gene expression. A 2.7-kb usp mRNA was detected at all developmental times tested, although its abundance varied. Among premetamorphic stages, both the 2.7-kb transcript and Usp protein attained their highest levels in the late third larval instar. The 2.7-kb usp transcript was also found in adult stages and a 1.2-kb transcript was detected in the polyadenylated RNA fraction of both mature adult females and early embryos. Aneuploids carrying two usp mutant alleles and a putative variegating ???? allele often developed deformities of the adult wing disc that apparently resulted from mutational disruption of usp activity before metamorphosis and whose frequency was affected by maternal genotype. Both of the recessive lethal usp mutations associated with this "cleft thorax" phenotype involved substitutions of conserved arginine residues in the DNA-binding domain, although the frequency of the phenotype was not the same for the two alleles. Both mutant proteins retained the ability to form heterodimers with EcR in vitro but showed reduced affinity for an ecdysone response element.

Exploring and Exploiting the Effect of Solvent Treatment in Membrane Separations

Razali, Mayamin,Didaskalou, Christos,Kim, Jeong F.,Babaei, Masoud,Drioli, Enrico,Lee, Young Moo,Szekely, Gyorgy American Chemical Society 2017 ACS APPLIED MATERIALS & INTERFACES Vol.9 No.12

<P>It is well-known that solvent treatment and preconditioning play an important role in rejection and flux performance of membranes due to solvent -induced swelling and solvent adsorption. Investigations into the effect of solvent treatment are scarce and application specific, and were limited 2 to a few solvents only. This study reveals the trend in solvent treatment based 'on solvent polarity in a systematic A. investigation with the aim to harness such effect for 0 intensification of membrane processes. Nine solvents with polarity indices ranging from 0.1 to 5.8 (hexane to acetonitrile) were used as treatment and process solvents on commercial Borsig GMT-oNF-2, Evonik Duramem 300, and emerging tailor-made polybenzimidazole membranes. TGA-GCMS, HS-GCFID, and 4\TM.R. techniques were employed to better understand the effect of solvent treatment on the polymer matrix of membranes. In this work) apart from the solvent treatment's direct effect 'on the membrane performance, a subsequent indirect effect on the ultimate separation process was observed. Consequently, a pharmaceutical case study employing chlorhexicline disinfectant and antiseptic was used to demonstrate the effect of solvent treatment on the nanofiltration-based purification. It is shown that treatment of polybenzimidazole membranes with acetone resulted in a 25% increase in product recovery at 99% impurity removal. The cost of the process intensification is negligible in terms of solvent consumption, mass intensity, and processing time.</P>

Sustainable wastewater treatment and recycling in membrane manufacturing

Razali, Mayamin,Kim, Jeong F.,Attfield, Martin,Budd, Peter M.,Drioli, Enrico,Lee, Young Moo,Szekely, Gyorgy The Royal Society of Chemistry 2015 GREEN CHEMISTRY Vol.17 No.12

<P>It is widely accepted that membrane technology is a green and sustainable process; however, it is not well known that the membrane fabrication process itself is quite far from green, with more than 50 billion liters of wastewater being generated every year contaminated with toxic solvents such as DMF and NMP. This urgent challenge is often overlooked and recent attempts to improve the sustainability of membrane fabrication have been limited to the replacement of toxic solvents with greener alternatives. Our recent survey from membrane industries indicates that such wastewater contributes to more than 95% of the total waste generated during the membrane fabrication process, and their disposal is considered cumbersome. Hence, recycling wastewater in the membrane industry is a pressing challenge to be resolved to augment the rapidly growing membrane market. In this work, a continuous wastewater treatment process is proposed and the quality of the recycled water was validated through membrane fabrication and performance tests. Seven different classes of adsorbents—graphene, polymers with intrinsic microporosity, imprinted polymers, zeolites, metal organic frameworks, activated carbon, and resins—were evaluated. The isotherm and kinetic behaviors of the best adsorbents have been fully characterized and the adsorbent regenerability without any performance loss has been confirmed for up to 10 wastewater treatment cycles. It has been demonstrated that over 99% of the organic impurities in the wastewater can be successfully removed and the recycled water can be reused without adverse effects on the final membrane performance. The proposed wastewater treatment technique can reduce the process mass intensity (PMI) of membrane fabrication by 99.9% per m<SUP>2</SUP> of the membrane produced. The required energy duty for different regeneration methods and wastewater treatment methods revealed that the adsorption technology is the most effective method, with the lowest energy requirement of about 1200 kJ per m<SUP>2</SUP> of the membrane produced.</P> <P>Graphic Abstract</P><P>Tackling the wastewater challenge in polymer membrane manufacturing with a continuous adsorption process. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c5gc01937k'> </P>