93 research outputs found
sj-docx-1-urj-10.1177_03915603231210604 – Supplemental material for Early versus delayed ureterolithotripsy following obstructive acute pyelonephritis treatment
No full textSupplemental material, sj-docx-1-urj-10.1177_03915603231210604 for Early versus delayed ureterolithotripsy following obstructive acute pyelonephritis treatment by Huseyin Ozgur Kazan, Muhammet Cicek, Hulya Caskurlu, Ramazan Gokhan Atis and Asif Yildirim in Urologia Journal</p
Changes in Antimicrobial Resistance of Urinary Tract Infections in Adult Patients over a 5-Year Period
No full textVahaboglu, H/0000-0001-8217-1767; Culpan, Meftun/0000-0001-8573-1192; caskurlu, hulya/0000-0002-6760-2052Objectives: We aimed to determine the most common bacteria that cause urinary tract infections (UTIs), the rate of antibiotic resistance of these uropathogens, and the changes in resistance rates over the years for adult patients diagnosed with UTIs. Methods: We retrospectively reviewed urine cultures and antibiotic susceptibility results of patients >17 years of age from our outpatient clinic between 2014 and 2018. The most common uropathogens and their antibiotic resistance rates were identified in different age groups (18-39, 40-59, and >= 60 years) and with respect to gender and date of admission. In addition, the change in antibiotic resistance of Escherichia coli between 2014 and 2018 was also examined. Results: A total of 9,556 positive urine cultures were included. The most common uropathogen was E. coli, and its prevalence was higher in females than males (70.6 vs. 53.4%, respectively). The majority of isolates were from patients >= 60 years of age. E. coli resistance was most pronounced for ampicillin (61.56%), followed by trimeth-oprim-sulfamethoxazole (49.80%), amoxicillin-clavulanic acid (34.69%), and cefazolin (30.72%). E. coli resistance to ampicillin, nitrofurantoin, cefepime, ciprofloxacin, fosfomycin, and amoxicillin-clavulanic acid increased significantly with time (all p = 0.001). For E. coli, resistance to ciprofloxacin, one of the most commonly used antibiotics for UTI, increased from 17 to 43% from 2014 to 2018. Conclusion: Most of the uropathogens displayed high resistance to ampicillin, tri-methoprim-sulfamethoxazole, and amoxicillin-clavulanic acid, and were susceptible to meropenem, ertapenem, and imipenem. Fosfomycin and cefepime were useful in the empirical treatment of community-acquired UTIs. A surprisingly high increase was observed in the resistance of E. coli to antimicrobial agents from 2014 to 2018
Time-resolved in-situ analysis of densification of nano-boron carbide under superimposed electric and thermal fields with energy dispersive x-ray diffraction
No full textBoron carbide (B4C) is characterized by high melting temperature, high hardness, and low density. Such exceptional properties make B4C is an important covalent solid which is considered the foremost material of choice for high-technology applications. However, low diffusivity caused by the highly directional and stiff character of the covalent bond makes the thermally activated sintering of B4C difficult. Highly covalent bonded ceramics are sintered with hot pressing and spark plasma sintering (SPS) to achieve high densities. However, these two techniques are limited to simple shape components and costly, involving expensive equipment. Pressureless sintering of B4C is desired to avoid expensive die designs and post sintering diamond machining, but very high sintering temperatures close to melting point is necessary to obtain high densities. Recently introduced flash sintering technique is a low voltage two electrode method which enhances the densification of ceramics. The sintering time and temperature can be reduced substantially with flash sintering that provide essential energy savings. In this study, the feasibility of flash sintering of nanoparticulate boron carbide is investigated. Firstly, we analyze the thermal expansion of boron carbide under different constant electric field strength to obtain fundamental data to provide insight into understanding of flash sintering. The electric field strength has an effect on the non-linear thermal expansion coefficients of B4C, and expansion becomes more non-linear with the increase of applied e-field. Secondly, the variety of non-isothermal and isothermal flash sintering experiments have been performed to achieve densification of B4C. By using low voltage, densities up to 95% of the theoretical density have been accomplished at temperatures as low as 711oC and short times on the order of few minutes. The very low process densification temperatures and time clearly indicate that mass transport in this nanoparticulate system under the action of both thermal and electrical fields are of an electrochemical origin. The implementation of ultrahigh energy EDXRD method in flash sintering of B4C enables us to monitor the evolution of nanoparticulate matter at the unit cell scale that is otherwise not possible with conventional Bragg-Brentano-method. EDXRD analysis reveals the transient anomalous unit cell expansion which is consistent with the flash sintering phenomena, and we demonstrate that flash sintering of B4C is possible with help of new coupling mechanism called the galvanomechanical effect. Moreover, we investigate the effect of different flash sintering conditions on densification of B4C.Ph.D.Includes bibliographical referencesby Hulya Bice
Comparison the effects of using different organic acids on gelatin extracted from cultured sea bream (Sparus aurata) scales
No full textIn the current study two different types of organic acids were used in gelatin extraction. The scales of gilthead seabream (Sparus aurata) were used as a source of gelatin. Also the effects on quality and gelling properties of used organic acids were investigated. Due to the determined gel strength values, high quality gelatins were produced in both groups with good functional properties. Total yield of the obtained products was found to be 31.10% (acetic acid), and 31.19% (propionic acid). According to the results, scale gelatin recovered by using acetic acid was found more suitable for industry with its 8.9 degrees C gelling point. Foam formation ability of acetic acid group was determined as 2.8 where the value of propionic was 3.0. Organic acids difference did not effect the colour of the product, both groups determined colourless and transparent. Result of the study showed that recovered collogen from gilthead sea bream scales have the potential to be an alternative source of gelatin with the determined functional properties.Scientific and Technological Research Council of Turkey (TUBITAK)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [112O952]; Ege University Scientific Research Projects Coordination UnitEge University [2012-SUF-021]This study was supported and funded by The Scientific and Technological Research Council of Turkey (TUBITAK) Project No. 112O952 and supported by Ege University Scientific Research Projects Coordination Unit (Project No. 2012-SUF-021). Used data are taken from the Msc Thesis project of the author Hulya (Sargin) Kalkan
An Operational Framework for an Online Community Based on the Commons, Dissensus and Shared Knowledge
No full textIn this article, we introduce a dissensual knowledge production mechanism for the creation and governance of the commons. Rather than seeking a singular truth which is a social construct, producing a bricolage of truths by citizen associations or communities opens up new perspectives for the commons and democracy. Taking an online community as a case study, we analyze knowledge production and sharing mechanisms, and conflict generation and resolution processes, using simple statistics, text mining, disagreement hierarchy, community guidelines, and group rules. We use the conclusions drawn from these techniques in the Institutional Analysis and Development framework. Superposing our findings and critical reading of current best practices, we define the four main principles as the operational framework for an online community based on the commons, dissensus, and shared knowledge: distributed versioning, layering, inclusion, and self-determination.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Spatial Planning and Strateg
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