Detaylı Arama
İptal
Bulunan: 76 Adet 0.003 sn
- Eklemek veya çıkarmak istediğiniz kriterleriniz için 'Dahil' / 'Hariç' seçeneğini kullanabilirsiniz. Sorgu satırları birbirine 'VE' bağlacı ile bağlıdır.
- İptal tuşuna basarak normal aramaya dönebilirsiniz.
Filtreler
Filtreler
Bulunan: 76 Adet 0.003 sn
Yayıncı : Springer Verlag ✕
Koleksiyon [21]
İlgili Araştırmacılar [53]
Ambargo Durumu [1]
Tam Metin [2]
Yazar [90]
Yayın Türü [5]
Yayın Yılı [11]
Yayın Dili [1]
Dergi Adı [39]
Yayıncı [1]
Konu Başlıkları [90]
Erişime Açık

One-step synthesis of triarm block copolymers by simultaneous atom transfer radical and ring-opening polymerization

Öztürk, Temel | Yavuz, Mahmut | Göktaş, Melahat | Hazer, Baki

One-step synthesis of poly(MMA-b-CL) triarm block copolymers was carried out by atom transfer radical polymerization of methyl methacrylate (MMA) and ring-opening polymerization of ?-caprolactone (CL) using 3-chloro-1,2-propanediol trifunctional initiator. The triarm block copolymers comprising one poly-MMA arm and two poly-CL arms were synthesized by changing some polymerization conditions such as monomer/initiator concentration, polymerization time. The effect of the reactions conditions on the polydispersity and molecular weights was also investigated. The block lengths of the block copolym ...Daha fazlası

Makale 2016 Polymer Bulletin73 ( 6 ) , pp. 1 - 1513 949 Görüntülenme

Synthesis of novel biodegradable elastomers based on poly[3-hydroxy butyrate] and poly[3-hydroxy octanoate] via transamidation reaction

Hazer, Baki | Akyol, Elvan | Şanal, Timur | Guillaume, Sophie | Çakmaklı, Birten | Steinbuchel, Alexander

Poly(3-hydroxyalkanoate)s (PHAs) are a class of polymers receiving attention because of their potential as renewable, biodegradable and high-technology properties. Unlike most short chain length (scl) PHAs such as poly(3-hydroxybutyrate) (PHB), medium chain length (mcl) PHAs such as poly(3-hydroxyoctanoate) (PHO) exhibit low crystallinity and are elastomeric in character. PHB-b–PEG-b–PHO block copolymers can combine both properties in block copolymer matrix. In this study, we report the synthesis of the block copolymers combining the PHB and PHO blocks. Transamidation reactions of PHB with pol ...Daha fazlası

Makale 2019 Polymer Bulletin76 ( 2 ) , pp. 9 - 932 1044 Görüntülenme
Erişime Açık

γ-Ray induced graft copolymerization of methyl methacrylate onto poly(ß-hydroxynonanoate)

Eroğlu, Mehmet S. | Çaykara, Tuncer | Hazer, Baki

Copolymers of poly(3-hydroxy-nonanoate), PHN, with methyl methacrylate, MMA, were prepared using 60Co-gamma irradiator. The bulk solutions of PHN in MMA were prepared at different PHN feed concentration and they were irradiated to 8.5 kGy at room temperature. Polymer fractions obtained by solvent-nonsolvent fractional precipitation were carefully characterized using gel permeation chromatography (GPC), nuclear magnetic resonance spectroscopy (NMR), and thermal gravimetric analysis (TGA) techniques. High copolymerization yield was observed and the copolymer compositions obtained from the TGA me ...Daha fazlası

Makale 1998 Polymer Bulletin41 ( 1 ) , pp. 5 - 60 535 Görüntülenme
Erişime Açık

Biodegradable poly(ε-caprolactone)-based graft copolymers via poly(linoleic acid): In vitro enzymatic evaluation

Allı, Sema | Tığlı-Aydın, Rahime Seda | Allı, Abdülkadir | Hazer, Baki

Well-defined graft copolymers based on poly(?-caprolactone) (PCL) via poly(linoleic acid) (PLina), are derived from soybean oil. Poly(linoleic acid)-g-poly(?-caprolactone) (PLina-g-PCL) and poly(linoleic acid)-g-poly(styrene)-g-poly(?-caprolactone) (PLina-g-PSt-g-PCL) were synthesized by ring-opening polymerization of ?-caprolactone initiated by PLina and one-pot synthesis of graft copolymers, and by ring-opening polymerization and free radical polymerization by using PLina, respectively. PLina-g-PCL, PLina-g-PSt-g-PCL3, and PLina-g-PSt-g-PCL4 copolymers containing 96.97, 75.04 and 80.34 mol% ...Daha fazlası

Makale 2015 JAOCS, Journal of the American Oil Chemists' Society92 ( 3 ) , pp. 4 - 458 1093 Görüntülenme
Erişime Açık

Influence of Soybean Oil Blending with Polylactic Acid (PLA) Films: In Vitro and In Vivo Evaluation

Aydın, R. Seda Tığlı | Akyol, Elvan | Hazer, Baki

Due to the great interest in oil-based polymers, which are prepared from renewable resources, different forms and amounts of soybean oil-based PLA films were prepared and evaluated for their potential usage as a medical biomaterial. Soybean oil, epoxidized soybean oil and auto-oxidized soybean oil were blended with PLA and PLA/oil films with appropriate oil amounts [2, 7, 14 and 20% (w/w)] were obtained by solvent casting. Thermal stability and plasticization effect were determined by adjusting oil amounts and type. Epoxidized soybean oil blended films showed the smallest increase in elongatio ...Daha fazlası

Makale 2017 JAOCS, Journal of the American Oil Chemists' Society94 ( 3 ) , pp. 4 - 424 1156 Görüntülenme

Enhancement of pacemaker induced stochastic resonance by an autapse in a scale-free neuronal network

Yılmaz, Ergin | Baysal, Veli | Perc, Matjaž | Özer, Mahmut

An autapse is an unusual synapse that occurs between the axon and the soma of the same neuron. Mathematically, it can be described as a self-delayed feedback loop that is defined by a specific time-delay and the so-called autaptic coupling strength. Recently, the role and function of autapses within the nervous system has been studied extensively. Here, we extend the scope of theoretical research by investigating the effects of an autapse on the transmission of a weak localized pacemaker activity in a scale-free neuronal network. Our results reveal that by mediating the spiking activity of the ...Daha fazlası

Makale 2016 Science China Technological Sciences59 ( 3 ) , pp. 3 - 370 902 Görüntülenme

A new adaptive neuro-fuzzy solution for optimization of the parameters in the digital holography setup

Ustabaş, Kaya Gülhan | Erkaymaz, Okan | Saraç, Zehra

In this paper,a fuzzy interference and an adaptive neuro-fuzzy interference system models have been presented in order to accelerate designing of the digital holographic setup without experiment. The setting parameters of experimental holographic setup, which affect the quality of images obtained from reconstructed holograms, are predicted digitally by proposed models before the recording process. Hence, we reduce the required time for designing of digital holographic setup with optimization process. The adaptive neuro-fuzzy interference system model for the optimization of the digital hologra ...Daha fazlası

Makale 2019 Soft Computing23 ( 18 ) , pp. 8 - 8837 861 Görüntülenme
Erişime Açık

An unusual cause for anterior knee pain: Strangulated intra-articular lipoma

Keser, Selçuk | Bayar, Ahmet | Numanoğlu, Gamze

Lipoma is the most frequently encountered benign soft tissue tumor. However, intra-articular lipomas are rarely seen. Anterior knee pain is a frequent complaint of adults and is of diverse etiology. This 42-year-old female patient had severe anterior knee pain, unresponsive to medical treatment. Magnetic resonance imaging revealed an intra-articular tumor of the knee joint. Arthroscopic intervention and subsequent histological examination resulted in the diagnosis of strangulated lipoma originating from infrapatellar fat pad. We present clinical, radiological and operative features of this rar ...Daha fazlası

Makale 2005 Knee Surgery, Sports Traumatology, Arthroscopy13 ( 7 ) , pp. 5 - 588 827 Görüntülenme
Erişime Açık

Effects of polymer-based, silver nanoparticle-coated silicone splints on the nasal mucosa of rats

Şevik Eliçora, Sultan | Erdem, Duygu | Dinç, Aykut Erdem | Altunordu Kalaycı, Özlem | Hazer, Baki | Yurdakan, Gamze | Külah, Canan

Infection is a serious complication after nasal packing that otolaryngologists seek to avoid. The aim of this study is to investigate the use of silver (Ag) nanoparticle, which serves as antimicrobial agents, with nasal tampons. The study design is an experimental animal model and the setting is tertiary referral center. Twenty-four rats were randomized into the following four groups: (1) control group (n = 6); (2) silicone nasal splint (SNS) group (n = 6); (3) polypropylene-grafted polyethylene glycol (PP-g-PEG) amphiphilic graft copolymer-coated SNS group (n = 6); and (4) Ag nanoparticle-emb ...Daha fazlası

Makale 2017 European Archives of Oto-Rhino-Laryngology274 ( 3 ) , pp. 1 - 1541 1326 Görüntülenme

Effect of cutting depth and line spacing on the cuttability behavior of sandstones by conical picks

Wang X. | Su O. | Wang Q.-F. | Liang Y.-P.

Various types of conical picks in different shapes are produced and widely employed on mechanical excavators. Depending on the mechanical and abrasivity properties of rocks, appropriate shape of pick is selected. In order to obtain maximum efficiency from the pick during excavation, the interaction between the pick and rock and the cutting mechanism play very important role. In this context, linear cutting tests were conducted by using a conical pick at the cutting depths between 3 and 18 mm and also at the various line spacings on sandstones exhibiting different mechanical properties. The res ...Daha fazlası

Makale 2017 Arabian Journal of Geosciences10 ( 23 ) 440 Görüntülenme

Comparison of novel intramedullary nailing with mini-invasive plating in surgical fixation of displaced midshaft clavicle fractures

Zehir S. | Zehir R. | Şahin E. | Çalbıyık M.

Introduction: This prospective randomized pilot study sought to determine whether fixation with Sonoma CRx intramedullary pin is a comparable alternative to minimally invasive plating fixation in patients with displaced clavicle fractures. Materials and methods: A total of 45 consecutive patients (Robinson class B1 or B2) were randomly allocated into two groups; intramedullary pin (IMP) group (n = 24, mean age; 33.17 ± 8.60 years, 14 males 58.3 %) received Sonoma CRx Collarbone pin (Sonoma, USA) whereas locking midshaft superior plating (MIPPO) group (n = 21, 32.38 ± 8.41 years, 12 males) pati ...Daha fazlası

Makale 2015 Archives of Orthopaedic and Trauma Surgery135 ( 3 ) , pp. 3 - 344 235 Görüntülenme

Efficacy of mirabegron in medical expulsive therapy

Solakhan M. | Bayrak O. | Bulut E.

To show the efficacy of mirabegron for medical expulsive treatment, in patients had intramural located distal ureteral stone. A 80 patients had intramural ureteral stone were assessed retrospectively between April 2017 and January 2018. Mirabegron 50 mg/day + diclofenac 100 mg/day (group 1, n = 40), and only diclofenac 100 mg/day (group 2, n = 40) were administered to patients, consecutively. Age, gender, stone size, laterality, and severity of hydronephrosis were recorded. Spontaneous stone expulsion rates (SER), stone expulsion time, and the number of daily colic episodes were evaluated. In ...Daha fazlası

Makale 2019 Urolithiasis47 ( 3 ) , pp. 3 - 307 365 Görüntülenme
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