Device characteristics of antenna-coupled metal-insulator-metal diodes (rectenna) using Al2O3, TiO2, and Cr2O3 as insulator layer for energy harvesting applications

Antenna-coupled metal-insulator-metal devices are most potent candidate for future energy harvesting devices. The reason for that they are ultra-high speed devices that can rectify the electromagnetic radiation at high frequencies. In addition to their speed, they are also small devices that can have more number of devices in unit area. In this work, it is aimed design and develop a device which can harvest and detect IR radiation

Model, design, and fabrication of antenna coupled metal-insulator-metal diodes for IR sensing

There is increasing demand for devices operating at room temperature for IR sensing and imaging. Antenna coupled metal-insulator-metal (MIM) diodes are potential candidates in this field. The reasons are miniaturizing features and femtosecond operation of these devices: smaller sizes lead to more pixels in limited areas and quantum tunneling phenomenon leads to faster operation. In this work, it is aimed to design and develop a device that can act as IR detector at room temperature

Reticulated platelet levels in patients with ulcerative colitis

Background In this study, we investigated whether reticulated platelets (RP) would be useful markers in the evaluation of ulcerative colitis (UC) activity and also aimed to gain indirect information about the platelet kinetics

Schwannoma originating from the infraorbital nerve: A case report

A 16-year-old female admitted to otolaryngology outpatient clinic with the complaints of pain and replacement of her left eyeball upwards. Radiological imaging demonstrated a solid mass inferior to the left globe. The anterior wall of the maxilla was thinned and the mass pushed the orbital floor inferiorly. Following subciliary incision, the bone over the mass was removed from the orbital rim and the mass was exposed. The mass originated from the infraorbital nerve. The mass was excised and the orbital rim, malar region and the orbital floor were reconstructed by a titanium mesh. The histopathological report was "schwannoma". Seven cases of schwannomas arising from the infraorbital nerve reported in English. literature. In this paper we report a case of infraorbital schwannoma and review the literature. (C) 2005 Elsevier Ireland Ltd. All rights reserved

An atypical esthesioneuroblastoma of the inferior nasal cavity and maxillary sinus: Report of a case

Esthesioneuroblastoma is a rare malignant tumor of the nasal cavity that originates from the olfactory epithelium. In this paper a very rare clinical presentation of this tumor is described. The tumor originated from the maxillary sinus and alveolar process, and was independent of the olfactory region. The patient was a 14-year-old girl presenting with facial swelling and nasal obstruction. Paranasal computed tomography showed a mass filling the right nasal cavity, infiltrating the alveolar process, eroding the anterior wall of the maxilla and invading the subcutaneous tissues of the cheek. Fine-needle aspiration and incisional biopsies identified an esthesioneuroblastoma. After neoadjuvant chemotherapy, we performed a right subtotal and left inferior maxillectomy and reconstructed the maxillary defect with a permanent obturator. At 2 years' follow-up the patient is free of recurrence

Product transfer from lab-scale to pilot-scale of quetiapine fumarate orodispersible films using quality by design approach

In this study, transfer from lab-scale non-continuous production to pilot-scale continuous production of orodispersible films was provided using solvent casting method under the framework of quality by design. Non-continuous production was carried out with petri dishes and continuous production was carried out with a coating machine. Films containing hydroxypropyl methylcellulose E5 as film forming polymer, polyethylene glycol 400 and propylene glycol as plasticizers, quetiapine fumarate as drug were formulated. Viscosity of the polymer dispersions, weight, thickness and disintegration time of the films were compared for the transfer of production. pH, moisture content, mechanical properties, folding endurance, uniformity of dosage units, dissolution, stability studies were also performed in pilot-scale orodispersible films. Finally, cytotoxicity studies were performed to determine cell viability. The study showed the possibility of producing F2-p-65/70 (pilot-scale film formulation containing 10 mg propylene glycol, dried at 65 degrees C and 70 degrees C) and F4-p-65/70 (pilot-scale film formulation containing 15 mg propylene glycol, dried at 65 degrees C and 70 degrees C), as the most suitable for further studies. Thus, a promising improvement has been achieved for schizophrenic patients by the production of quetiapine fumarate loaded orodispersible films and the process of scale-up in films has been demonstrated

Surgical importance of highly located innominate artery in neck surgery

Massive hemorrhage is an unusual complication of tracheotomy, and the most common causes are injury to the anterior jugular veins and the thyroid isthmus, or unrecognized variations of the vascular structures, such as the arteria thyroidea ima. We present a case of high-running innominate artery that ascends until the third tracheal ring and courses horizontally anterior to the trachea in a patient with laryngeal carcinoma. If not noticed during tracheolaryngeal surgery, trauma to this vessel and subsequent hemorrhage may be fatal. In this report, the case is presented and the surgical significance of this anomaly is emphasized. (c) 2005 Elsevier Inc. All rights reserved

Cervical sympathetic chain schwannoma: Two different clinical presentations

In this report we present 2 cervical sympathetic chain schwannoma (CSCS) cases with different clinical presentations, one being a pulsatile neck mass associated with Horner's syndrome and the other being an asymptomatic neck mass. CSCS usually presents as an asymptomatic neck mass and atypical findings such as Horner's syndrome and/or pulsation may occur in rare cases. Pulsatile CSCSs are generally diagnosed as carotid body tumors at initial workup and patients are referred to vascular surgeons. The differences in symptomatology, the preoperative management, and the importance of differential diagnosis are discussed