Elit Türk kadın hentbolcularda 30 – 15 intermittent fitness test ile anaerobik performans ilişkisinin değerlendirilmesi

Bu araştırmanın amacı elit Türk kadın hentbolcuların dayanıklılık performanslarının belirlenmesinde kullanılan saha temelli 30-15 aralıklı test (IFT) performansı ile anaerobik performans; 30 saniye Wingate Anaerobik güç ve kapasite, çeviklik T-Testi performans sonuçları ilişkilerini araştırmaktır. Çalışmaya Türkiye Süper liginde oynayan 30 kadın hentbolcu gönüllü olarak katılmış 4 tanesi çalışmayı tamamlayamamıştır. Araştırma hipotezini test etmek için kesitsel tanımlayıcı korelasyon tasarımı kullanılmıştır. Ölçümler üç ayrı günde 30-15 IFT, Çeviklik T-Test ve Wingate 30 sn Anaerobik güç ve kapasite testleri 72 saat ara ile uygulanmıştır. Araştırma hipotezini test etmek için ilk olarak 30-15 IFT performans sonuçları ile anaerobik performans ve çeviklik ilişki katsayıları hesaplanmış ve ilişki tespit edilen değişkenlerin 30-15 IFT performansını ne kadar tahmin ettiğini belirlemek için de Çoklu Doğrusal Regrasyon analiz yöntemi kullanılmıştır. Katılımcıların 30-15 dayanıklılık testi ile VO2maks kapasitelerine ulaşılmış ve oyuncuların VO2maks seviyeleri ile anaerobik güç ve kapasite arasındaki ilişkiye bakılmış bunun sonucunda yapılan regresyon analizinde, bu iki parametre arasında anlamlı bir ilişkiye rastlanılmamıştır (R2= 0,110 p>0,05). Çalışmada VO2maks ile çeviklik performansı arasındaki ilişki de incelenmiştir. Regresyon analizi bu iki parametre arasında anlamlı bir ilişki olmadığını ortaya çıkarmıştır (R2= 0,134 p>0,05). Özetle, elit kadın hentbolcularda, 30-15 IFT testinin anaerobik performans ile bir ilişkisinin olmadığı belirlenmiştir

Analysis of intestinal and nasopharyngeal microbiota of children with meningococcemia in pediatric intensive care unit: INMACS-PICU study

This article belongs to the Special Issue Pediatric Diagnostic Microbiology.Microbiota composition might play a role in the pathophysiology and course of sepsis, and understanding its dynamics is of clinical interest. Invasive meningococcal disease (IMD) is an important cause of community-acquired serious infection, and there is no information regarding microbiota composition in children with meningococcemia. In this study, we aimed to evaluate the intestinal and nasopharyngeal microbiota composition of children with IMD.[Materials and Methods]: In this prospective, multi-center study, 10 children with meningococcemia and 10 age-matched healthy controls were included. Nasopharyngeal and fecal samples were obtained at admission to the intensive care unit and on the tenth day of their hospital stay. The V3 and V4 regions of the 16S rRNA gene were amplified following the 16S Metagenomic Sequencing Library Preparation.[Results]: Regarding the alpha diversity on the day of admission and on the tenth day at the PICU, the Shannon index was significantly lower in the IMD group compared to the control group (p = 0.002 at admission and p = 0.001, on the tenth day of PICU). A statistical difference in the stool samples was found between the IMD group at Day 0 vs. the controls in the results of the Bray–Curtis and Jaccard analyses (p = 0.005 and p = 0.001, respectively). There were differences in the intestinal microbiota composition between the children with IMD at admission and Day 10 and the healthy controls. Regarding the nasopharyngeal microbiota analysis, in the children with IMD at admission, at the genus level, Neisseria was significantly more abundant compared to the healthy children (p < 0.001). In the children with IMD at Day 10, genera Moraxella and Neisseria were decreased compared to the healthy children. In the children with IMD on Day 0, for paired samples, Moraxella, Neisseria, and Haemophilus were significantly more abundant compared to the children with IMD at Day 10. In the children with IMD at Day 10, the Moraxella and Neisseria genera were decreased, and 20 different genera were more abundant compared to Day 0.[Conclusions]: We first found alterations in the intestinal and nasopharyngeal microbiota composition in the children with IMD. The infection itself or the other care interventions also caused changes to the microbiota composition during the follow-up period. Understanding the interaction of microbiota with pathogens, e.g., N. meningitidis, could give us the opportunity to understand the disease’s dynamics.This study was supported by the Eskisehir Osmangazi University Scientific Research Grant (2018/11046).Peer reviewe

Investigation of the Salt Concentration Dependence of Water-Gated Field Effect Transistors (WG-FET) Using 16-nm-Thick Single Crystalline Si Film

This paper presents the effect of NaCl concentration on the operation of a water-gated field effect transistor (WG-FET) that uses 16-nm-thick single crystalline silicon (Si) film. In WG-FET, electrical double layer (EDL) formed at the water/silicon interface behaves as gate dielectric and this fluidic interface makes WG-FET a suitable device for sensing applications. Characteristics of EDL and the threshold voltage of WG-FET depend on the molarity of solution. Increasing the molarity of NaCl solution from 0.5 to 65 mM changes the threshold voltage from 360 to 465 mV. Accordingly, drain current of the WG-FET device changes with NaCl concentration

Displacement Sensor with Inherent Read-Out Circuit Using Water-Gated Field Effect Transistor (WG-FET)

This paper presents, for the first time, a displacement sensor with inherent read-out circuit using an inverter built with WG-FET that has 16-nm-thick single crystalline silicon film. In WG-FET, electrical double layer (EDL) capacitances are formed at water/silicon and water/top gate interfaces. These two capacitances and the resistance of the de-ionized (DI) water droplet build a first order RC network. Propagation delay of an inverter built with WG-FET depends on this RC constant. When the distance between top gate and silicon film changes, EDL capacitances remain the same, but resistance of the DI-water droplet changes. Accordingly, propagation delay of the inverter changes linearly with this distance. Increasing the distance from 400 &#181;m to 1200 &#181;m changes low-to-high propagation delay tplh of the inverter from 1.08 ms to 1.36 ms and high-to-low propagation delay tphl from 0.48 ms to 0.56 ms, which yields sensitivities of 0.35 &#181;s/&#181;m and 0.1 &#181;s/&#181;m, respectively

Decolorization of wastewater of a baker's yeast plant by membrane processes

The aim of this study is to develop a membrane-based treatment scheme to remove colorants from the effluent of a baker's yeast plant. For this purpose microfiltration (MF), ultrafiltration (UF) and nanofiltraton (NF) membranes with differing molecular weight cut-offs (MWCOs) were tested. To evaluate the effectiveness of membrane processes in treating the waste stream, optical density (OD), COD, color measurements together with permeation fluxes were used. Effects of pretreatment methods (coagulation and coarse filtration) and feed composition on OD, color, COD were studied. In addition, gel filtration analysis was employed to characterize feed and permeate streams in terms of MW distribution of organics that are present. Maximum rejections obtained were 94%, 89% and 72% for OD, color and COD, respectively, when 0.8 pm microfiltration membrane and 400 Da NF membrane were used in series. It was also observed that addition of intermediate UF steps did not increase overall rejections and final permeate flux of NF membrane. Based on these observations, an efficient scheme was offered

The antifungal activity of Pancratium maritimum

The methanol extract of P. maritimum bulbs, though devoid of antibacterial activity, showed interesting antifungal activity against four Candida species, being, however, ineffective against C. albicans. (C) 1999 Elsevier Science B.V. All rights reserved

Study of dural suture watertightness: an in vitro comparison of different sealants

International audienc

Comparison of different final irrigant agitation techniques for the removal of Enterococcus faecalis biofilms from root canals: an in vitro study

Objective: The aim of this in vitro study was to compare the effectiveness of different final irrigant agitation techniques in the removal of Enterococcus faecalis biofilms from root canals. Material and Methods: In total, the root canals of 85 extracted single-rooted human maxillary incisors teeth were prepared using the Revo-S system to a 40/06 size. The apical foramen of each tooth was sealed by light-cured resin composite material to obstruct bacterial leakage. The specimens were sterilized in an autoclave at 121°C for 15 min and stored until further use. All teeth except five (negative control group) were inoculated with Enterococcus faecalis and incubated in a CO2 chamber at 37°C for 7 days; the trypticase soy broth was changed every 2 days. For the determination of possible biofilm formation, five of the 80 teeth were randomly selected as a positive control group; one tooth of positive control group was analysed for biofilm development by scanning electron microscope (SEM) and these teeth received no final irrigant agitation procedure. Then, the remaining 75 teeth were randomly divided into five test groups (n=15 each) and were sequentially irrigated with 5% sodium hypochlorite (NaOCl), 17% ethylenediaminetetraacetic acid and 5% NaOCl. Following each irrigant application, different final irrigant agitation techniques were introduced for 60 s (3×20-s sessions). Group 1 received manual–dynamic agitation, group 2 received passive ultrasonic agitation (PUI), group 3 received EndoActivator agitation, group 4 received photon-initiated photoacoustic streaming (PIPS) with the Er:YAG laser and group 5 received conventional syringe irrigation. Colony-forming units (CFUs) were counted in samples from the positive control and test groups. Data were analysed using Kruskal–Wallis and post-hoc Mann–Whitney U multiple comparison tests. Results: E. faecalis elimination was significantly better in the experimental groups than in the positive control groups (p < 0.001). Manual–dynamic agitation and conventional syringe irrigation, with no significant differences between the two groups. Conclusion: Essentially, CFU reduction was significantly greater in the PUI, EndoActivator and PIPS groups than in the manual–dynamic agitation and conventional syringe irrigation groups (p <0.001), with no significant differences among the former three groups