Cr/Klorofil-a/n-GaP/Ag Aygıtının Akım-Gerilim Karakteristiklerinin İncelenmesi

Bu çalışmada Cr/n-GaP kontak arayüzeyine Klorofil-a malzemesi kullanılarak elde edilen aygıtın elektriksel özellikleri incelendi. Omik kontak için gümüş (Ag) metali termal buharlaştırma yöntemi ile oluşturuldu. Klorofil-a tabakası döndürerek kaplama yöntemiyle kaplandı ve krom (Cr) metali DC saçtırma yöntemiyle klorofil-a tabakasının üzerine kontaklar şeklinde kaplanarak Cr/Klorofil-a/n-GaP/Ag aygıtı üretildi. Klorofil-a tabakasının optik geçirgenlik ölçümü alındı. Oda sıcaklığında Cr/Klorofil-a/n-GaP/Ag aygıtının elektriksel ölçümleri incelendi ve karanlık-aydınlık ortamda alınan I-V ölçümlerinden idealite faktörü (n), engel yüksekliği (Φ_b) ve seri direnç (R_s) değerleri hesaplanarak, sonuçlar karşılaştırıldı. Karanlık ortamda hesaplanan n değeri 1,35 iken aydınlık ortamda bu değer 1,05 olarak bulundu. Ayrıca Cheung ve Norde Fonksiyonları da kullanılarak, kontak karakteristik parametreleri hesaplandı ve sonuçlar karşılaştırılarak kontrol edildi. Aydınlatmanın, kontak karakteristik parametreleri üzerinde önemli etkileri olduğu tespit edildi

Professional Values in a Sample of Nursing Students from Different Countries

AIM: This study aimed to determine the professional values of nursing students from different countries. METHODS: This descriptive study was conducted with a convenience sample of nursing students from different countries. The data were collected using an identification form and the Nurses’ Professional Values Scale–Revised. A total of 305 nursing students from Turkey, Tanzania, and Spain were included in the analysis. RESULTS: In this study, the mean nursing professional values scores were 113.5±12.8, 105.8±16.0, 107.9±8.4 for Turkey, Tanzania, and Spain, respectively (minimum–maximum: 44–130). There were no statistically significant differences between the Turkish and the Spanish students’ professional value scores, but the Turkish students’ scores were higher than the Tanzanian students. CONCLUSION: The factors affecting the level of professional values of students for each country were different. For educators, it is important to develop teaching strategies to empower professional values. Understanding cultural differences can guide professional values and universal ethics in nursing practice, education, and research

Sağlık Çalışanlarında İntikam Davranışlarına Eğilim

İntikam davranışı, yanlış algılanan bir davranış karşılığında acı çektirmektir ve istenmeyen bir davranıştır. Çalışmanın amacı, sağlık kurumlarında hizmet veren sağlık çalışanlarının (doktor, hemşire, diğer sağlık çalışanı ve büro personeli) intikam davranışlarına eğilimlerini belirlemektir. Araştırmanın evrenini Konya/Türkiye’de çalışmanın yapılmasına izin veren iki kamu hastanesi oluşturmaktadır. Örneklem 414 çalışandan oluşmuştur. Çalışmada anket metodu kullanılmıştır. Veriler; Haziran-Ağustos 2017 tarihleri arasında “kişisel bilgi formu” ve “İntikam Ölçeği” olmak üzere iki bölümden oluşmaktadır. İntikam Ölçeği; Stuckless ve Goranson (1992) tarafından geliştirilen; Türkçeye geçerlilik ve güvenirliliği Satıcı ve diğ. (2015) tarafından yapılan 20 maddelik bir ölçektir. İntikam Ölçeği’nin güvenirliliği 0,89 olarak bulunmuştur. Verilerin analizinde, betimsel istatistikler ile t testi ve ANOVA testi kullanılmıştır. Katılımcıların % 61’i kadın, % 39’u ise erkektir. Yaş ortalaması ise 31’dir. İntikam Ölçeği’nin toplam ortalama değeri ve standart sapması 3,007±1,074 şeklindendir. Ayrıca, erkeklerin (3,200±1,192) kadınlara (2,885±0,975) göre anlamlı biçimde daha yüksek İntikam Ölçeği puanına sahip olduğu bulunmuştur. Hekim, hemşire, diğer sağlık çalışanı ve büro personeli ile intikam ölçeği toplam puanı karşılaştırıldığında aralarında herhangi bir fark bulunamamıştır (p gt;0,05). Sağlık çalışanların intikam ölçeği ortalama puanları 2,950±1,063 ile 3,249±1,070 arasında değişmektedir. Sonuç olarak, sağlık çalışanların intikam davranışına eğilim düzeyleri ortalama puanı “biraz katılmıyorum” şeklinde bulunmuştur

Presenting maxillary sinus cholesterol granüloma with diffused bone necrosis

Kolesterol granulomu hemorajiye sekonder gelişen kolesterol kristalleriyle ilişkili yabancı cisim reaksiyonu sonucu oluşan kronik inflamatuar bir proçestir. Vucudun pek çok yerinde görülebilir ancak paranazal sinüslerde nadir olarak görülmekte olup maksiller sinüs yerleşimli olgular literatürde az sayıda yer almaktadır. Bu yazıda 5 yıldır devam eden sol yüzde ağrı, nefes almada güçlük şikayetiyle başvuran , paranazal sinüs bilgisayarlı tomografide sol maksiller sinüsde kemik destrüksiyonuna neden olan ve maksiler sinüs kolesterol granülomu tanısı alan 53 yaşında bir erkek olgu tanı , tedavi ve histopatolojik özellikleri ile birlikte sunulmaktadırCholesterol granuloma is a chronic inflammatory process that occurs as a result of foreign body reaction associated with cholesterol crystals developing secondary to hemorrhage. It can be seen in many parts of the body, but it is rarely seen in the paranasal sinuses and cases located in the maxillary sinus are few in the literature. In this article, a 53-year-old male patient who presented with complaints of pain on the left face and difficulty in breathing for 5 years, and was diagnosed with maxillary sinus cholesterol granuloma, which caused bone destruction in the left maxillary sinus on paranasal sinus computed tomography together with the diagnosis, treatment and histopathological features is offere

The protective effect of astaxanthin on cisplatin-induced ototoxicity

Background. Promising studies have been conducted with many substances to reduce the ototoxic effects of cisplatin, but there is no treatment that completely eliminates the ototoxic effect. Objectives. To determine the effectiveness of astaxanthin (ASX) as a protective agent against cisplatin-induced ototoxicity. Materials and methods. Thirty-six rats were randomly divided into 6 groups. Group 1 received no drug injections except for anesthetics; group 2 received intraperitoneal (IP) olive oil only for 8 days; group 3 received only IP ASX 75 mg/kg dissolved in olive oil for 8 days; group 4 received a single dose of only IP 16 mg/kg cisplatin on the 5th day; group 5 received 25 mg/kg ASX IP daily for 8 days and a single 16 mg/kg dose of cisplatin on the 5th day; group 6 received 75 mg/kg ASX IP daily for 8 days and a single 16 mg/kg dose of cisplatin on the 5th day. The animals were tested for distortion product otoacoustic emissions (DPOAE) before and 3 days after cisplatin treatment. The animals in all groups were sacrificed under anesthesia on the 10th day. Before sacrifice, inferior vena cava blood samples were drawn into commercial tubes for biochemical analysis and their cochlea were prepared for histological analysis. Results. The ASX+cisplatin groups demonstrated significantly higher DPOAE thresholds when compared to the cisplatin-only group (p < 0.05). The ASX 25 mg/kg/day+cisplatin group showed a significant increase in total antioxidant capacity compared to the cisplatin-only group, whereas the ASX 75 mg/kg/day+cisplatin group had significantly lower total oxidative stress and oxidative stress index. Histologic results showed that the cortical organ was better preserved in the ASX+cisplatin groups compared to the cisplatin-only group, and the degeneration in the spiral ganglion and inner and outer hair cells was less visible in the ASX groups. Conclusions. Astaxanthin can protect hearing from cisplatin-induced ototoxicity, prevent cellular degeneration and significantly reduce oxidative stress

Ameliorating effect of pomegranate juice consumption on carbon tetrachloride-induced sperm damages, lipid peroxidation, and testicular apoptosis

The aim of this study was to investigate whether pomegranate juice (PJ) consumption has an ameliorating effect on carbon tetrachloride (CCl4)-induced sperm damages and testicular apoptosis associated with the oxidative stress in male rats. The study comprised of four groups (groups 1–4). Group 1 received olive oil þ distilled water daily; group 2 was treated with 5 ml/kg PJ þ olive oil daily; group 3 was treated with 0.25 ml/kg CCl4 dissolved in olive oil, weekly þ distilled water daily; and group 4 received weekly CCl4 þ daily PJ. All administrations were performed by gavage and maintained for 10 weeks. CCl4 administration caused significant decreases in body and reproductive organ weights, sperm motility, concentration and testicular catalase activity, significant increases in malondialdehyde (MDA) level, and abnormal sperm rate and apoptotic index along with some histopathological damages when compared with the control group. However, significant ameliorations were observed in absolute weights of testis and epididymis, all sperm quality parameters, MDA level, apoptotic index, and testicular histopathological structure following the administration of CCl4 together with PJ when compared with group given CCl4 only. In conclusion, PJ consumption ameliorates the CCl4-induced damages in male reproductive organs and cells by decreasing the lipid peroxidation

The investigation on the properties of ceramic bodies having aggregate additives

Ceramic materials are widely used from everyday life to space technology. Properties of ceramics are widely affected by the type of their raw materials, their shaping and production methods. The use of conventional techniques and materials in the production of traditional ceramics are preferred in terms of continuity and their productivity. To avoid monotonous and to open different visual effects in traditional ceramic industry, one needs to have a look at different area of use. The term of aggregate describes materials, which are different in chemical and structural feathers but hold together in one body. However, in ceramic sector, aggregate is defined as particulates of rocks and mineral pieces. There are limited results reported in literature about the use of these materials in the traditional ceramic bodies. Therefore, in this work, the properties of the ceramic bodies having natural aggregates in to different ceramic pastes were investigated after firing. Findings showed that ceramics produced with aggregate additives could be useful in using them at artistic applications