Now showing items 98-117 of 183

    • Label-free nanometer-resolution imaging of biological architectures through surface enhanced raman scattering 

      Ayas, Sencer; Çınar, Göksu; Özkan, Alper Devrim; Soran, Zeliha; Ekiz, Oner; Kocaay, Deniz; Tomak, A.; Toren, Pelin; Kaya, Yasin; Tunc, I.; Zareie, H.; Tekinay, T.; Tekinay, Ayse Begum; Güler, Mustafa O.; Dana, Aykutlu (Nature Publishing Group, 2013)
      Label free imaging of the chemical environment of biological specimens would readily bridge the supramolecular and the cellular scales, if a chemical fingerprint technique such as Raman scattering can be coupled with super ...
    • Linearity and shift invariance for quantitative magnetic particle imaging 

      Lu, K.; Goodwill, P.; Sarıtaş, Emine U.; Zheng, B.; Conolly, S. (IEEE, 2013)
      Magnetic Particle Imaging (MPI) is a promising tracer imaging modality that employs a kidney-safe contrast agent and does not use ionizing radiation. MPI already shows high contrast and sensitivity in small animal imaging, ...
    • Magnetic Particle Imaging (MPI) for NMR and MRI researchers 

      Sarıtaş, Emine Ülkü (Elsevier, 2013)
      Magnetic Particle Imaging (MPI) is a new tracer imaging modality that is gaining significant interest from NMR and MRI researchers. While the physics of MPI differ substantially from MRI, it employs hardware and imaging ...
    • Magnetostimulation limits in magnetic particle imaging 

      Sarıtaş, Emine Ülkü; Goodwill, P.; Zhang, G.; Conolly, S. (IEEE, 2013)
      For magnetic particle imaging (MPI), specific absorption rate (SAR) and more critically magnetostimulation (i.e., dB/dt) safety limits will determine the optimal scan parameters, such as the drive field strength and ...
    • Mammalian target of rapamycin (mTOR), aging, neuroscience, and their association with aging-related diseases 

      Celebi-Birand, Ergül Dilan; Karoğlu, Elif Tuğçe; Doldur-Ballı, Füsun; Adams, Michelle M. (Elsevier Inc., 2016)
      Normal aging is accompanied by cognitive impairment with subtle cellular and molecular changes in the brain, whereas, pathological brain aging manifests as severe behavioral impairments with cellular pathology. Understanding ...
    • Manyetik parçacık görüntüleme için sinyal-gürültü oranını eniyileyen görüntü geriçatım tekniği 

      Bozkurt, Ecem; Sarıtaş, Emine Ülkü (Gazi Universitesi Muhendislik-Mimarlik, 2017)
      Magnetic particle imaging (MPI) is a new biomedical imaging modality that images the spatial distribution of superpamagnetic iron oxide nanoparticles. In MPI, the amplitude of the excitation magnetic field that causes the ...
    • Materials for articular cartilage regeneration 

      Tombuloglu, Ayşegül; Tekinay, Ayşe B.; Güler, Mustafa O. (Bentham Science Publishers B.V., 2012)
      Many health problems remaining to be untreatable throughout the human history can be overcome by utilizing new biomedical materials. Healing cartilage defects is one of the problems causing significant health issue due to ...
    • Measuring cross-lingual semantic similarity across European languages 

      Şenel, Lütfü Kerem; Yücesoy, V.; Koç, A.; Çukur, Tolga (IEEE, 2017)
      This paper studies cross-lingual semantic similarity (CLSS) between five European languages (i.e. English, French, German, Spanish and Italian) via unsupervised word embeddings from a cross-lingual lexicon. The vocabulary ...
    • Meta- and paracontrast reveal differences between contour- and brightness-processing mechanisms 

      Breitmeyer, B. G.; Kafalıgönül, Hulusi; Öğmen, H.; Mardon, L.; Todd, S.; Ziegler, R. (Elsevier, 2006)
      We investigated meta- and paracontrast masking using tasks requiring observers to judge the surface brightness or else the contours of target stimuli. The contour task revealed strongest metacontrast at SOAs shorter than ...
    • Metacontrast masking and stimulus contrast polarity 

      Breitmeyer, B.; Tapia, E.; Kafalıgönül, Hulusi; Öğmen, H. (Elsevier, 2008)
      A recent report [Becker, M. W., & Anstis S. (2004). Metacontrast masking is specific to luminance polarity. Vision Research, 44, 2537–2543] of a failure to obtain metacontrast with target and mask stimuli of opposite ...
    • Microscopic characterization of peptide nanostructures 

      Mammadov, Rashad; Tekinay, Ayse B.; Dana, Aykutlu; Güler, Mustafa O. (Elsevier, 2012)
      Peptide-based nanomaterials have been utilized for various applications from regenerative medicine to electronics since they provide several advantages including easy synthesis methods, numerous routes for functionalization ...
    • Mitochondrial serine protease HTRA2 p.G3999S in a kindred with essential tremor and Parkinson disease 

      Gülümser, Hilal Ünal; Gulsuner, S.; Mercan, F. N.; Onat, Onur Emre; Walsh, T.; Shahin, H.; Lee, M. K.; Dogu, O.; Kansu, T.; Topaloglu, H.; Elibol, B.; Akbostanci, C.; King, M. C.; Özçelik, Tayfun; Tekinay, Ayşe B. (National Academy of Sciences, 2014)
      Essential tremor is one of the most frequent movement disorders of humans and can be associated with substantial disability. Some but not all persons with essential tremor develop signs of Parkinson disease, and the ...
    • Mixed signals: the effect of conflicting reward and goal-driven biases on selective attention 

      Preciado, D.; Munneke, Jaap; Theeuwes, J. (Springer New York LLC, 2017)
      Attentional selection depends on the interaction between exogenous (stimulus-driven), endogenous (goal-driven), and selection history (experience-driven) factors. While endogenous and exogenous biases have been widely ...
    • A modular antigen presenting peptide/oligonucleotide nanostructure platform for inducing potent immune response 

      Tohumeken, Sehmus; Gunduz, Nuray; Demircan, M. Burak; Gunay, Gokhan; Topal, Ahmet E.; Khalily, M. Aref; Tekinay, T.; Dana, Aykutlu; Güler, Mustafa O.; Tekinay, Ayse B. (Wiley - VCH Verlag GmbH & Co. KGaA, 2017-05)
      The design and development of vaccines, which can induce cellular immunity, particularly CD8+ T cells hold great importance since these cells play crucial roles against cancers and viral infections. Covalent conjugation ...
    • Motion-based nearest vector metric for reference frame selection in the perception of motion 

      Agaoglu, M. N.; Clarke, Aaron M.; Herzog, M. H.; Öğmen, H. (Association for Research in Vision and Ophthalmology Inc., 2016)
      We investigated how the visual system selects a reference frame for the perception of motion. Two concentric arcs underwent circular motion around the center of the display, where observers fixated. The outer (target) arc's ...
    • Multi-domain short peptide molecules for in situ synthesis and biofunctionalization of gold nanoparticles for integrin-targeted cell uptake 

      Gülsuner, Hilal Ünal; Ceylan, Hakan; Güler, Mustafa O.; Tekinay, Ayse B. (American Chemical Society, 2015)
      We describe design and synthesis model of multidomain (modular) peptides (MDPs), which direct a reaction cascade coupling the synthesis and surface functionalization of gold nanoparticles (AuNPs) in a single step. The ...
    • Mussel inspired dynamic cross-linking of self-healing peptide nanofiber network 

      Ceylan, Hakan; Urel, Mustafa; Erkal, Turan S.; Tekinay, Ayse B.; Dana, Aykutlu; Güler, Mustafa O. (Wiley, 2013)
      A general drawback of supramolecular peptide networks is their weak mechanical properties. In order to overcome a similar challenge, mussels have adapted to a pH-dependent iron complexation strategy for adhesion and curing. ...
    • N-cadherin mimetic peptide nanofiber system induces chondrogenic differentiation of mesenchymal stem cells 

      Çimenci, Çağla Eren; Uzunalli-Kurtuluş, G.; Çalışkan, Özüm S.; Güler, M. O.; Tekinay, Ayşe B. (American Chemical Society, 2019)
      Cadherins are vital for cell-to-cell interactions during tissue growth, migration, and differentiation processes. Both biophysical and biochemical inputs are generated upon cell-to-cell adhesions, which determine the fate ...
    • Nanomechanical characterization by double-pass force-distance mapping 

      Dagdas, Yavuz S.; Aslan, M. N.; Tekinay, Ayse B.; Güler, Mustafa O.; Dâna, Aykutlu (Institute of Physics Publishing, 2011)
      We demonstrate high speed force-distance mapping using a double-pass scheme. The topography is measured in tapping mode in the first pass and this information is used in the second pass to move the tip over the sample. In ...
    • Neural differentiation on synthetic scaffold materials 

      Mammadov, Busra; Sever, Melike; Güler, Mustafa O.; Tekinay, Ayşe B. (Royal Society of Chemistry, 2013)
      The potential of stem cells to differentiate into a variety of subgroups of neural cells makes stem cell differentiation and transplantation a promising candidate for neurodegenerative disorder therapies. However, selective ...