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Multiple eccrine spiradenoma in zosteriform distribution

Altinyazar, HC | Kargi, E | Ozen, O | Koca, R | Babuccu, O

WOS: 000184877700047 PubMed: 12960891

Erişime Açık

Phase-plane analysis for a simplified model of Purkinje cell dendrite

Özer, Mahmut

In this study, phase-plane analysis is carried out for a simplified model of Purkinje cell dendrite in terms of voltage-gated ionic channels involved. State variables, nullclines and equilibrium points of the model are determined, and effects of ionic channel conductance and injected current on the shape of nullclines and the equilibrium points are investigated. In this study, phase-plane analysis is carried out for a simplified model of Purkinje cell dendrite in terms of voltage-gated ionic channels involved. State variables, nullclines and equilibrium points of the model are determined, and ...Daha fazlası

Erişime Açık

A molecular mechanics and semiempirical molecular orbital study on the conformation of polynorbornene chains

Yilmaz-Savaşkan, Sevil | Abbasoğlu, Rza | Hazer, Baki

The conformational analysis of polynorbornene (PNB) chains was investigated with the AM1, MM2, AMBER and OPLS methods taking into consideration the possibility of binding of norbornene monomers to each other at various positions, i.e. exo-exo, exo-endo, endo-endo. The chain that is formed by connecting exo-endo positions of the monomers has lower torsional barrier energy than those formed with bonds at other positions and has more flexibility. It is determined that the thredisyndiotactic chain formed by exo-endo addition adopts a helix structure and has a coil shape. The disyndiotactic chain f ...Daha fazlası

Late complication of abdominoplasty in an obese patient: Systemic inflammatory response syndrome and seroma

Kargi, E | Akduman, D | Dokuzoguz, B | Ozkocak, I | Tuncel, A | Deren, O | Erdogan, B

WOS: 000181477700042 PubMed: 12618626

Polypoid formation of cysts in scrotal calcinosis: An uncommon case

Hosnuter, M | Kargi, E | Babuccu, O | Babuccu, B | Isikdemir, A

WOS: 000182614200062 PubMed: 12711992

Progression in acute ischemic stroke: frequency, risk factors and prognosis

Sumer, M | Ozdemir, I | Erturk, O

Background and purpose: The aim of this study was to investigate the frequency, possible predictive factors and the prognosis of deteriorating ischemic stroke. Methods: A total of 266 stroke patients who presented within 24 h of onset were enrolled. Clinical deterioration was defined as a decrease of 1 points in the Canadian Neurological Scale (CNS). Rankin Score (RS) was performed at discharge and at six months. Results: Of the 266 patients studied, 26 (9.8%) worsened. Involvement of posterior circulation (odds ratio (OR) 3.16) and noncardioembolic infarction (OR 4.5) were found to be indepen ...Daha fazlası

Tuberculous meningitis in adults: Review of 61 cases

Sutlas, PN | Unal, A | Forta, H | Senol, S | Kirbas, D

Background: Tuberculosis is still a major cause of serious illness in developing countries. The objective of this study was to assess the clinical, laboratory, radiological and prognostic features of tuberculous meningitis (TBM) in immuncompetent adult patients. Patients and Methods: Sixty-one patients with confirmed or presumed TBM seen over a 12-year period at the Neurology Department of Bakirkoy Research and Training Hospital for Psychiatric and Neurological Disease, Istanbul, Turkey, were analyzed retrospectively. Patients were grouped according to the severity of meningitis on admission ( ...Daha fazlası

Zinc, copper and iron concentrations in cerebral cortex of male rats exposed to formaldehyde inhalation

Özen O.A. | Songur A. | Sarsilmaz M. | Yaman M. | Kuş I.

Retrospective cohort studies and clinical findings have suggested effects of formaldehyde exposure on the central nervous system in anatomists, embalmers and pathologists. On the other hand, harmful effects of formaldehyde inhalation on the nervous system are not well documented. The concentrations of elements such as zinc, copper and iron within the cerebral cortex indicate whether physiological conditions are maintained. In this study, adult male albino Wistar rats were exposed to formaldehyde at different concentrations (0; 6.1; 12.2 mg·m-3) and during different periods of time (subacute-su ...Daha fazlası

Erişime Açık

Production of bacterial polyesters from some various new substrates by Alcaligenes eutrophus and Pseudomonas oleovorans

Koçer, Halil | Borcaklı, Mehlika | Demirel, Songün | Hazer, Baki

Poly(3-hydroxy alkanoate)s (PHA)s are bacterial polyesters that have, due to their biodegradability and biocompatibility, attracted considerable industrial interest. All the substrates used in feeding Alcaligenes eutrophus and Pseudomonas oleovorans have been reviewed as far as we know, and some more new substrates or mixtures have been used in PHA production by microorganisms. Alcaligenes eutrophus was fed with 4-pentenoic acid, 2-hydroxy ethyl methacrylate (HEMA), corn oil acids, linseed oil acids and limonene as well as mixtures of acetic acid and glucose or lactose. Either HEMA as a sole c ...Daha fazlası

Erişime Açık

Relaxation phenomena in the activation and inactivation gates of ionic channels

Özer, Mahmut

The dynamics of a voltage-gated ionic channel is modeled by the conventional Hodgkin-Huxley mathematical formalism. In that formalism, the dynamics of the ionic channel activation and inactivation gates is modeled by a first-order differential equation dependent on the gate variable and the membrane potential. In this study a method, which combines statistical equilibrium theory and the thermodynamics of irreversible processes, is proposed for the study of the relaxation phenomena in the activation and inactivation gates of ionic channels present in the excitable membranes of neurons. In order ...Daha fazlası

Denizden çıkarılan kumun beton mukavemetine etkisi (2003)

Özkan, Ömer

1999 yılında meydana gelen depremler sonrasında, kıyı şeridinde bulunan şehirlerde yapı malzemesi olarak kullanılan betonun karışımında deniz kumunun kullanılmasının beton mukavemetine ve dayanımına etkisi tartışılmaya başlanmıştır. Bu çalışmada Zonguldak-Alaplı bölgesinde denizden çıkarılan kum ile Zonguldak-Alaplı Çay'ından çıkarılan kumun mukavemetlerinin zamana göre değişimleri karşılaştırılmıştır. Kullanılan ince agregada birim ağırlık, özgül ağırlık, ince madde oranı, organik madde oranı tayin edilerek, incelik modülü deneyleri yapılmıştır. Yapılan deneyler neticesinde denizden çıkarılan ...Daha fazlası

Sulfur dioxide adsorption isotherms and breakthrough analysis on molecular sieve 5A zeolite

Kopaç, Türkan | Kocabaş, Sefa

In this study sulfur dioxide adsorption and rate were investigated on molecular sieve 5A zeolite in a packed bed system at 473 K. The experimental adsorption isotherms were compared with Langmuir, Freundlich, and Dubinin-Radushkevitch-Kaganer (DRK) adsorption isotherm models. The simple Langmuir and the Freundlich models provided a better description of sulfur dioxide sorption on molecular sieve 5A zeolite, so that a selective surface adsorption mechanism for adsorption of sulfur dioxide on molecular sieve 5A zeolite can he suggested. The breakthrough behavior for sulfur dioxide adsorption on ...Daha fazlası

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