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Endoscopic Ultrasonography in Pediatric Patients with Pancreatobiliary Disease: Single-Center Trial
Demirbas, Fatma,Kaymazli, Mustafa,Caltepe, Gonul,Abbasguliyev, Hasan,Kalayci, Ayhan Gazi,Bektas, Ahmet The Korean Society of Pediatric Gastroenterology 2021 Pediatric gastroenterology, hepatology & nutrition Vol.24 No.2
Purpose: The use of Endoscopic ultrasonography (EUS) in pediatric patients is not as common as in adults. The aim of this study is to evaluate the role of EUS in the diagnosis of pancreatobiliary disease in childhood. Methods: Between December 2016 and January 2018, the findings of patients who underwent EUS were evaluated retrospectively. Results: Of the 41 patients included in the study 25 were girls (61.0%), mean age was 12.2±4.2 years. EUS was performed for biliary colic in 21 (51.2%), for recurrent pancreatitis in 12 (29.2%), for cholecystitis/cholangitis in 5 (12.2%), and for acute pancreatitis in 3 (7.4%) patients. EUS had a significant clinical effect in the decision of treatment and follow-up of 6/21 biliary colic cases, in diagnosis and follow-up of 6/12 recurrent pancreatitis cases, in decision-making and monitoring of invasive procedures (ERCP/surgery) of 3/5 acute cholecystitis/cholangitis and 2/3 of acute pancreatitis cases as well as in follow-up of the other cases. The effectiveness of EUS in determining direct treatment and invasive intervention was 43.9%. None of the patients had complications related to the EUS procedure. Conclusion: Although current guidelines show that EUS can be used in pediatric patients, this is limited to a few published studies. In this study, it is shown that EUS is a safe method for the diagnosis, follow-up and treatment of common pancreatobiliary pathologies in childhood.
Coordinated Locomotion and Monitoring Using Autonomous Mobile Sensor Nodes
Seokhoon Yoon,Soysal, O.,Demirbas, M.,Chunming Qiao IEEE 2011 IEEE transactions on parallel and distributed syst Vol.22 No.10
<P>Stationary wireless sensor networks (WSNs) fail to scale when the area to be monitored is unbounded and the physical phenomenon to be monitored may migrate through a large region. Deploying mobile sensor networks (MSNs) alleviates this problem, as the self-configuring MSN can relocate to follow the phenomenon of interest. However, a major challenge here is to maximize the sensing coverage in an unknown, noisy, and dynamically changing environment with nodes having limited sensing range and energy, and moving under distributed control. To address these challenges, we propose a new distributed algorithm, Causataxis, which enables the MSN to relocate toward the interesting regions and adjust its shape and position as the sensing environment changes. (In Latin, causa means motive/interest. A taxis (plural taxes) is an innate behavioral response by an organism to a directional stimulus. We use Causataxis to refer to an interest driven relocation behavior.) Unlike conventional cluster-based systems with backbone networks, a unique feature of our proposed approach is its biosystem inspired growing and rotting behaviors with coordinated locomotion. We compare Causataxis with a swarm-based algorithm, which uses the concept of virtual spring forces to relocate mobile nodes based on local neighborhood information. Our simulation results show that Causataxis outperforms the swarm-based algorithm in terms of the sensing coverage, the energy consumption, and the noise tolerance with a slightly high communication overhead.</P>
Hilal Dikmen,Hamza Goktas,Fatmanur Demirbas,Selma Kayacan,Humeyra Ispirli,Muhammet Arici,Mustafa Turker,Osman Sagdic,Enes Dertli 한국식품과학회 2024 Food Science and Biotechnology Vol.33 No.3
In this study, Streptococcus thermophilus and Lactobacillus bulgaricus strains from traditional Turkish yoghurts were isolated, identified by 16S rRNA sequencing and genotypically 14 S. thermophilus and 6 L. bulgaricus strains were obtained as distinct strains by MLST analysis. Lactic acid production levels of the L. bulgaricus strains were higher than S. thermophilus strains. HPLC analysis showed that EPS monosaccharide composition of the strains mainly consisted of glucose and galactose. In general, all strains were found to be susceptible for antibiotics, except some strains were resistance to gentamicin and kanamycin. Apart from two strains of S. thermophilus, all strains displayed strong auto-aggregation level greater than 95% at 24 h incubation. S. thermophilus strains showed higher cell surface hydrophobicity than L. bulgaricus strains. This study demonstrated the isolation, identification, genotypic discrimination and techno-functional features of wild type yoghurt starter cultures which can potentially find place in industrial applications.
Tu gba Bayraktutan,Bahri Gür,Ümit Demirbas 대한화학회 2020 Bulletin of the Korean Chemical Society Vol.41 No.10
In this study, a sensor system was designed to detect metal ions based on the fluorescence resonance energy transfer (FRET) process between free-phthalocyanine (PC) and merocyanine 540 (MC540). Following the determination of parameters and appropriate conditions for energy transfer, the sensor system was tested with different metal ions. The conclusion was that the system showed high selectivity to iron and aluminum ions. In this FRET system, limit of detection (LOD) values for metal ions were calculated as 437?nM for Al3+ and 32.1?nM for Fe3+. The system was able to detect iron and aluminum in very low concentrations. It also showed good selectivity for the two metal ions.
( Hakan Sarlak ),( Fatih Bulucu ),( Erol Arslan ),( Seref Demirbas ),( Muharrem Akhan ),( Sait Demirkol ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1
Background: Studies have shown that arterial stiffness is an independent predictor of cardiovascular diseases. Left ventricular hypertrophy (LVH) is an independent risk factor for early death. It is caused by malignant ventricular arrhythmias due to ventricular hypertrophy. In this study we aimed to investigate the relationships between arterial stiffness parameters and electrocardiographic criteria for LVH. Methods: A total of 59 subjects (30 females, 29 males) were included into the study. The subjects were the patients having arterial stiffness and electrocardiographic measurements applied in the internal medicine out-patient clinics for their chronic diseases or based upon their complaints. Results: The pulse wave velocity (PWV) was signifi cantly associated with Sokolow-Lyon ‘II’ (r=0.269; p=0.041) and the central aortic pressure (CAP) was signifi cantly associated with Sokolow-Lyon ‘II’ and Romhilt-Estes Score (r=0.303; p=0.021 and r=0.275; p=0.037, respectively) in whole group. The augmentation index of aortic (AIXao) was signifi cantly associated with Sokolow-Lyon ‘II’ (r=0.381; p=0.042) in men. The CAP was signifi cantly associated with Sokolow-Lyon ‘II’, Cornell Product and Romhilt-Estes Score (r=0.524; p=0.004, r=0.402; p=0.031 and r=0.444; p=0.016, respectively) in women. Conclusions: These data suggest that some arterial stiffness parameters may be predicted by using R wave amplitude of aVL derivation. Although our small scale preliminary investigation confers some clues for this approach, it is obvious that large scale and more detailed investigations are needed.
( Hakan Sarlak ),( Fatih Bulucu ),( Erol Arslan ),( Seref Demirbas ),( Kenan Saglam ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1
Considering the low rate of dipping, the presence of an evening dose seems to be important in elderly hypertensive women when arranging the treatment for their hypertension. In monotherapy, divided doses will be rational.
Saeed Sajjadi,Alireza Khataee,Nafiseh Bagheri,Mehmet Kobya,Ahmet Şenocak,Erhan Demirbas,Aybike Gül Karao glu 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.77 No.-
Herein, Fe3O4@MOF-2 (MOF: metal-organic framework) nanocomposite, as a heterogeneous nanocatalyst,was applied to activate persulfate (PS) in the attendance of ultrasonic (US) irradiation(Fe3O4@MOF-2/US/PS) for degradation of diazinon. The evaluation results showed that, in the acidicsolution (pH = 3), the reaction rate constant of Fe3O4@MOF-2/US/PS system (0.0546 min 1) was morethan 6-folds than that of the US/PS system (0.0079 min 1). Reducing the diazinon concentration, alongwith raising the Fe3O4@MOF-2 dosage and the US bath power favored the degradation of diazinon. It wasfound that Fe3O4@MOF-2 hadfine catalytic performance and reuseibility. The diazinon decompositionpathway was proposed by GC–MS analysis.
Gokhan Cobana,Ibrahim Yavuz,Busra Karadas,Ahmet Emin Demirbas 대한치과교정학회 2020 대한치과교정학회지 Vol.50 No.4
Objective: To evaluate the changes in the nose in three dimensions after Le Fort I osteotomy in patients with skeletal Class III malocclusion. Methods: The subjects were 40 adult patients (20 females and 20 males; mean age, 20.3 ± 3.0 years; range, 17.0 to 31.1 years) who underwent one-piece Le Fort I osteotomy with maxillary advancement and impaction treatment for maxillary hypoplasia. The mean maxillary advancement was 4.56 ± 1.34 mm, and the mean maxillary impaction was 2.03 ± 1.04 mm. Stereophotogrammetry was used to acquire three-dimensional images before and at least 6 months after surgery. Results: Alare (Al) and alare curvature (Ac) points had moved vertically and anterolaterally postoperatively. A significant increase was observed in the nasal ala width and alar base width, and no changes were noted in the columellar length, nasolabial angle, and nasal area. There was a significant relationship between maxillary impaction and nasal ala width and horizontal and sagittal positions of the bilateral Al and Ac. The only relationship found was between maxillary advancement and postoperative sagittal location of the subnasale and pronasale. Conclusions: Nasal soft tissues were highly affected by the vertical movement of the maxilla; however, the soft tissue responses were individual-dependent.
Biryol Seda,Demirbağ Zihni,Erdoğan Pervin,DEMIR, ISMAIL 한국응용곤충학회 2022 Journal of Asia-Pacific Entomology Vol.25 No.1
Long-term and intensive use of synthetic insecticides to control the green peach aphid, Myzus persicae (Homo ptera: Aphididae) in agricultural production in the world has resulted in pest resistance and environmental pollution. The aim of the study was to develop an environmentally-friendly and effective mycoinsecticide from a local fungal isolate against M. persicae. According to the results of the screening experiments using 15 isolates (6 × Metarhizium, 5 × Beauveria, 2 × Isaria, 2 × Lecanicillium) at 1 × 10 7 conidia ml − 1 concentrations and the dose–response experiments at 1 × 10 5 –1 × 10 9 conidia ml − 1 concentrations against M. persicae nymphs, Beauveria bassiana (KTU-24) was identified as the most promising isolate. The strain KTU-24 is also had tolerance to ecological conditions such as temperature, and UV-B. KTU-24 with advantageous and superior properties was used to develop a test mycoinsecticide. Mass production of spores by KTU-24 was conducted out by liquid-state fermentation using liquid medium. Spores harvested from the sporulated biomass were used to develop an oilbased mycoinsecticide, and the product was designated as AFIDISIDAL-OD Bbas-TR61. The product had lethal effect on M. persicae nymphs at a concentration of 1 × 10 8 conidia ml − 1 in leaf-disc (82.5%) and pot (84.33%) experiments in a climate chamber. The oil-based mycoinsecticide developed in this study could be profitable when used in aphid-IPM prgrams by reducing crop loss and synthetic pesticides use.