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A Case of Pituitary Hemorrhage Following Cardiopulmonary Bypass Surgery  [PDF]
Ozgen Ilgaz Kocyigit, Serdar Kabatas, Erdinc Civelek, Ezgi Tuncay, Oguz Omay, Tufan Cansever, Ayda Turkoz
Surgical Science (SS) , 2011, DOI: 10.4236/ss.2011.23034
Abstract: A 68-year-old female patient with previous history of transsphenoidal hypophysectomy operation underwent three-vessel coronary artery bypass graft (CABG) surgery for extensive coronary artery disease. Preoperative neurological examination revealed sequelae visual loss at right temporal visual field. Follow-up Magnetic Resonance Imaging studies showed a residual hypophyseal tumor tissue extending to suprasellar area. No additional pathology was detected in the early postoperative cranial control CT, but aggravation of visual field defect was determined. Coincidently, cranial magnetic resonance imaging (MRI) showed hemorrhage into the tumor tissue. We decided to follow-up the patient who exhibited no additional symptoms and was discharged well on the fifth day due to the signs of resolution of hemorrhage. Follow-up controls of the patient at sixth and twelfth months demonstrated normal hormone levels without any additional clinical complaints. We present preoperative assessment, perioperative anesthesia management, and postoperative clinical follow-up of a patient with a residual hypophyseal tumor.
The Determination of Thiourea and Nickel Cloride LC50 Concentration on the Species of Acanthodiaptomus denticornis and Cyclops vicinus (Copepoda)
Ayda Tellioglu,Dursun Sen
Pakistan Journal of Biological Sciences , 2003,
Abstract: In this study search for LC50 concentration thiourea and nickel chloride (cancerogen) on Acanthodiaptomus denticornis and Cyclops vicius (Copepoda) have been investigated. A solution in different concentration has been put into an environment of, 15 cc containing 10 individual and by observing for 24 h, the death rate has been investigated and by using the control group, 15 sperate test have been made for each different test and by having the varage number of them, the death rate in each concentration has been calculated. As a result the LC50 concentration has been determined.
1341 (1925) Senesi 15 Eylül'ünde stanbul'da Süleymaniye Medresesinde lk Defa Olarak A lacak Kütüphanecilik Kursunun Müfredat Program
Ali Can,Ayda Per?in
Türk Kütüphanecili?i , 1997,
Fatih (Mehmet II.) Vakfiyesinden
Ali Can,Ayda Per?in
Türk Kütüphanecili?i , 1997,
The Turkish Online Journal of Distance Education , 2011,
Abstract: Nowadays organizations strive to find the ways to communicate with their target audiences by using varied advertising mediums because of the developments on the information communication technologies and the globalization. In this context, like the other institutions, the distance education institutions has to execute communication activities by using different advertising mediums to create a positive position in their consumers minds. In this sense, the increase on the ownership of mobile phones and the new specialties of mobile phone technologies like accessing to the internet made mobile marketing efforts important on the advertising investments of distance education institutions. Especially with the mobile marketing, distance education institutions can create personalized informative and promotion messages for their target audiences. Mobile marketing approach has lots of advantages for the institutions and the most important advantages that helps the institutions are; the formats of the approach are forming according to the newest technological developments and it gives chance to create messages for specific target audiences. But mobile marketing has also disadvantages like; the target audience’s mobile phones can be incompatible with the messages and the target audience can ignore these messages. However much the approach has some disadvantages, the distance education institutions- which are based on the technological developments also like the mobile marketing approach- has to invest on mobile marketing according to send personalized and effective advertising messages about their programs’ contents, benefits etc.
The Effects of the Work Environment on Nurse Burnout in Emergency Department
Turkish Journal of Emergency Medicine , 2011,
Abstract: Objectives: This study examines the relationship between burnout and work environment among nurses working in emergency departments (ED) in Istanbul. Methods: The subjects were ED nurses who met the research criteria (n=132). Data were collected by questionnaire to determine the demographic characteristics of the subjects as well as their emotions and opinions about their Professional life. Nurses’ burnout was measured by the Maslach Burnout Inventory and nurses’ work environment was determined by the Work Environment Scale. Results: In this study Emotional Exhaustion and Depersonalization levels have been found low in nurses who like their job and work places and with longer duration of Professional work. On the other hand, hard working conditions or unexpected overtime, inability to spare time for social activities, dissatisfaction of socio-economic situation and having trouble with team members were all associated with increased levels of Emotional Exhaustion and Depersonalization. It was found that there were significant positive relationship between Work Environment Scale-Employee Fears states and Emotional Exhaustion with Depersonalization; Work Environment Scale-Job Satisfaction state and Emotional Exhaustion, and significant negative relationship between Work Environment Scale-Quality Management, Professional Relationships and Physical Resources states and Emotional Exhaustion, Depersonalization and Personal Accomplishment (p<0.05). Conclusions: Personal qualifications and volunteerism should be considered when selecting nurses working in the emergency departments. In an ED it have seen that equipment, adequate space and number of employees, which facilitates the treatment and care of patients, have positive impact on nurse’s burnout levels. Time allocation opportunity for participation in social activities or hobbies should be given to the employees. Incompatibility and conflict within the team should be avoided by properly setting the job descriptions of the team members.
Coexistence of K-ras mutations and HPV infection in colon cancer
Nur Buyru, Ayda Tezol, Nejat Dalay
BMC Cancer , 2006, DOI: 10.1186/1471-2407-6-115
Abstract: K-ras mutations were analyzed by a mutagenic PCR assay and digestion with specific restriction enzymes to distinguish the wild-type and mutant codons. HPV infection was analyzed by PCR amplification and hybridization with specific probes by Southern blotting. Stattistical analyses were performed by the chi-square and Fisher's exact testsHPV gene fragments were detected in 43 tumors and 17 normal tissue samples. HPV 18 was the prevalent type in the tumor tissue. A mutation at codon 12 of the K-ras gene was present in 31 patients. 56% of the HPV-positive tumors also harbored a K-ras mutation. Codon 13 mutations were not observed. These data indicate that infection with high risk HPV types and mutational activation of the K-ras gene are frequent events in colorectal carcinogenesis.Our findings suggest that mutational activation of the K-ras gene is a common event in colon carcinogenesis and that HPV infection may represent an important factor in the development of the premalignant lesions leading to the neoplastic phenotype.Colorectal carcinogenesis is a complex, multistep process involving environmental and lifestyle factors, sequential genetic changes and possibly viral components in discrete geographical areas. Genetic changes inactivating tumor suppressor and mismatch repair genes or activation of oncogenes which are involved in cell growth, proliferation and differentiation are implicated in the development of colon carcinoma. The target genes for these alterations are APC (Adenomatous Polyposis Coli), the ras family and p53 [1]. The ras family of oncogenes (N-ras, H-ras and K-ras) encode a small 21-kD protein (p21 ras) involved in the transduction of external stimuli to effector molecules across plasma membranes [2]. This protein has an intrinsic GTPase activity allowing inactivation following signal transduction in the normal cellular environment [2,3]. Activation of the K-ras protooncogene by point mutation is one of the most frequent genetic alterations associ
Geochemical, Sedimentological and Mineralogical Characterization of Surficial Sediments in Eynak Marsh (North of Iran)  [PDF]
Ayda Hazermoshar, Razyeh Lak, Mohammad Reza Espahbood, Nader Kohansal Ghadimvand, Reza Farajzadeh
Open Journal of Geology (OJG) , 2016, DOI: 10.4236/ojg.2016.67050
Abstract: A multidisciplinary study of the sedimentology, geochemistry and mineralogy has been conducted to understand the linkage between marsh and alluvial sediments and also their potential sources in Eynak marsh, North of Iran. The influence of the upstream potential sources on recent sediment geochemistry has been discussed based on geochemical, sedimentological and mineralogical results. A spatial grain size distribution study was carried out to investigate the hydrodynamic and deposition system of the marsh. So, the surficial sediment sampling was carried out to describe the sedimentological parameters and elemental geochemistry of sediments in Eynak marsh. Mineralogical complexes are mainly made up of felsic minerals such as quartz, calcite, feldspar, pyrite, mica, and clay minerals (in very low values) indicated by high amounts of Al, Ca, and Ni. As expected, the mineralogy of sediments is controlled mainly by the rock formations. Also sediment textures are controlled by the hydrodynamic condition in the marsh. So its distribution has been influenced by distance from the entrance sediments to Eynak marsh. The results showed that there are no enrichments related to fine grain sediment distributions. An association of Al with the trace elements such as Sc, Y, La, Ce, and Zr indicates that their distributions are mainly controlled by the felsic rocks in the upstream. On the other side, due to the waste water entrance to the marsh, Ni and Pb concentration could be under the effects of anthropogenic activities around the marsh. Results represented high values for Mn concentration (min 462, max 1784 and average 1037 ppm) and it showed a significant correlation with Ca, Sr, and Mg. A redox habitat and constantly calm hydrodynamic circumstance in the study area, likely cause high concentration of Ca, Sr, and Mg, and Mn. And they are representing negative correlations with some elements such as Al, Be, Fe, K, and Na.
The Energy Spectrum of Carriers between Two Concentric Spheres of Kane-Type Semiconductors
Arif Babayev,Sukru Cakmaktepe,Deniz Turkoz
Journal of Nanomaterials , 2006, DOI: 10.1155/jnm/2006/57519
Abstract: The electronic states of carriers between two concentric spheres of Kane-type semiconductor are theoretically investigated and compared with the results of the parabolic band approximation. Calculations are performed for a hard-wall confinement potential and the eigenstates and the eigenvalues of the Kane Hamiltonian are obtained. Taking into account the real band structure (strong spin-orbital interaction, narrow band gap), the size dependence of the energy of electrons, light holes, and spin-orbital splitting holes in InSb semiconductor concentric spheres are calculated. According to the obtained results both in parabolic and nonparabolic (Kane model) cases, the electron energy levels come close to each other with the increasing of the radius.
Preliminary hazard assessment and site characterization of Me elik campus area, Eski ehir-Turkey
A. Orhan,M. Turkoz,H. Tosun
Natural Hazards and Earth System Sciences (NHESS) & Discussions (NHESSD) , 2013, DOI: 10.5194/nhess-13-75-2013
Abstract: Limited knowledge of ground conditions, such as geotechnical parameters, is one of the main causes of foundation failure. Unknown ground conditions can also cause additional burden costs. Due to lack of geotechnical parameters in foundation soil, some problems can be observed during and after the construction. In this study, a comprehensive field study was conducted to make a preliminary hazard assessment on the Me elik campus area, Eski ehir, Turkey. In this context, the experimental studies were performed in two stages. In the first stage, boreholes were drilled in the field; a standard penetration test (SPT) was performed and disturbed/undisturbed samples were collected from certain levels. In the second stage, laboratory tests were performed in order to identify and classify the samples. Unconfined compression strength and triaxial compression tests were conducted on undisturbed samples for determining the engineering characteristics. XRD (X-ray diffraction) tests were performed and the swelling potential of the samples were evaluated. The liquefaction potential of the area was also assessed on a SPT-based method. Thus, the geotechnical parameters and the liquefaction potential of the sub-surface in the study area were thoroughly analyzed and presented to be used for further studies.
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