Functionalization of Carbon-based Nanostructures with Light Transition-metal Atoms

In a recent letter [T. Yildirim and S. Çiraci, Phys. Rev. Lett. 94, 175501 (2005)], the unusual hydrogen storage capacity of Ti decorated carbon nanotubes has been revealed. The present paper extends this study further to investigate the hydrogen uptake by light transition-metal atoms decorating various carbon-based nanostructures in different types of geometry and dimensionality, such as carbon linear chain, graphene, and nanotubes. Using first-principles plane-wave method we show that not only outer but also inner surface of a large carbon nanotube can be utilized to bind more transition-metal atoms and hence to increase the storage capacity. We also found that scandium and vanadium atoms adsorbed on a carbon nanotube can bind up to five hydrogen molecules. Similarly, light transition-metal atoms can be adsorbed on both sides of graphene and each adsorbate can hold up to four hydrogen molecules yielding again a high-storage capacity. Interestingly, our results suggest that graphene can be considered as a potential high-capacity H2 storage medium. We also performed transition state analysis on the possible dimerization of Ti atoms adsorbed on the graphene and single-wall carbon nanotube

Parasitic Appendicitis From Past to Present in Turkey

Background: Understanding the etiology of appendicitis is important for developing effective treatments the rela­tionship between parasitic appendicitis and various socio-cultural factors were examined, particu­larly with respect to the incidence of literacy. The aim of the article was to research the relations between para­sitic appendicitis and literacy ratio in population.Methods: Cases of parasitic appendicitis resulting in surgery performed at Buca Seyfi Demirsoy Large State Hospital Surgery Clinic between 2002 and 2009 were retrospectively reviewed and classified accord­ing to age, sex, type of parasite, morbidity, and mortality. Studies conducted in different regions of Turkey as well as in other countries were reviewed to determine if there was a relationship between para­sitic appendicitis and literacy. Results: Of the 1,969 appendectomy cases reviewed, nine were classified as parasitic appendicitis (0.45%). Enterobius vermicularis was observed in seven cases and Taenia spp. in two. The average age was 26.4 yr. No morbidity or mortality was found.Conclusion: The data were compared with a retrospective review of studies conducted in the same regions and a decrease in the rate of parasitic appendicitis was observed during the period between the two re­views. It was determined that a low literacy rate was associated with an increase in the incidence of para­sitic appendicitis. Observations made between different countries also produced similar results. In coun­tries where the incidence of parasitic appendiciticis was greater than 1.5%, the literacy rate was less than 88%. To avoid appendectomy resulting from parasites, it is important to increase education and literacy. In some areas, individuals with appendicitis undergo surgery due to a lack of education or poor literacy

Evlilikte Suçu Affetme ve Yüklemenin Evlilik Doyumu Üzerindeki Yordayıcı Etkisi

Öz. Bu araştırmanın amacı, evli bireylerin evlilik doyumları ile evlilikte suçu affetme ve ilişkilerde yükleme düzeyleri arasında ilişki olup olmadığını tespit etmek ve evlilikte suçu affetme ve yüklemenin evlilik doyumları üzerinde yordayıcı etkisi olup olmadığını incelemektir. Araştırma örneklemi İstanbul ilinde yaşayan 190 kişiden oluşturmaktadır. Araştırmada; “Evlilik Doyum Ölçeği”, Evlilikte Suçu Affetme Ölçeği” ve “İlişkilerde Yükleme Ölçeği” kullanılmıştır.  Yapılan araştırma bulgularına göre, evlilik doyumu ve evlilikte suçu affetmenin dargınlık-kaçınma alt boyutu arasında negatif yönde anlamlı bir ilişki vardır ve suçu affetmenin dargınlık- kaçınma alt boyutu evlilik doyumu yordamaktadır. Elde edilen bir başka sonuç ise evlilik doyumu ve ilişkilerde yüklemenin arasında negatif yönde anlamı bir ilişki vardır. İlişkilerde yükleme, evlilik doyumunu anlamlı düzeyde yordamaktadır. Anahtar Sözcükler: Evlilik Doyum, ilişkilerde yükleme, suçu affetme, evlili

New advantageous tool in single incision laparoscopic cholecystectomy: the needle grasper

Introduction: During single-incision laparoscopic cholecystectomy (SILC), the gallbladder is suspended with stitches, resulting in perforation risk and difficulty in exploration. Aim: We used the needle grasper in SILC to hang and manipulate the gallbladder. Material and methods : Sixty-five patients (43 female, 22 male) who underwent SILC between December 2013 and December 2014 were analyzed retrospectively for patient demographics, duration of operation, laparotomy or conventional laparoscopy necessity, drain use, complications, and hospital stay periods. To place the SILC port (Covidien, Inc.), the needle grasper was inserted at the right upper abdominal quadrant without an incision to hang and manipulate the gall-bladder. Results : The mean age was 47.9 ±13.068 years; the mean body mass index (BMI) was 26.94 ±3.913 kg/m2. ASA scores were 1, 2, and 3. Two patients with high BMI with additional trocar use were excluded. The operations were completed without any additional trocar in 59 patients. The mean operation time was 89 ±22.41 min. Eighteen patients required a drain; all were discharged after drain removal. One patient needed re-hospitalization and percutaneous drainage and was discharged on the 9th day. Fifty-three patients were discharged on the 1st post-operative day. Eleven patients with drains were discharged on the 2nd day, and 1 was discharged on the 7th day. The mean hospital stay period was 1.26 ±0.815 days. Conclusions : The main difficulty of SILC is to manipulate hand tools because the triangulation principle of laparoscopy use is not possible in SILC. Inserting a needle grasper into the abdominal cavity at the right subcostal area to manipulate the gallbladder helps and does not leave a visible scar

A Case-Control Study on the Oxidative Status in Women with Polycystic Ovary Syndrome Treated with Clomiphene Citrate

Derici, Mehmet Kursat/0000-0002-8260-7492WOS: 000469780700002PubMed: 31129677Background: Polycystic ovary syndrome (PCOS) is associated with infertility or subfertility due to impaired ovulation. Clomiphene citrate is a first-line treatment option for the induction of ovulation in women with PCOS. The study aimed to compare markers of oxidative stress or the total oxidative status (TOS), total antioxidant status (TAS), and levels of paraoxonase-1 (PON-1) before and after day 21 of the menstrual cycle in women with PCOS treated with clomiphene citrate to induce ovulation. Material/Methods: The study included 75 women who were divided into a control group (n=25) that included healthy untreated women, untreated women with PCOS (n=24) who had spontaneous ovulation, and women with PCOS who were treated with clomiphene citrate for subfertility or infertility (n=26) (the PCOS-CC group). The study group was treated for five days with clomiphene citrate (50 mg/day). Peripheral venous blood was sampled on day 3 and day 21 of the menstrual cycle from women in all three groups, and TAS, TOS, and PON-1 levels were measured. Results: In all three groups, TAS and PON levels were significantly reduced and TOS values were significantly increased on day 21 of the menstrual cycle. Comparison of TAS, TOS, and PON-1 levels between the three study groups on day 3 and day 21 of the menstrual cycle showed no significant difference (p=0.600, p=0.223, p=0.956, respectively). Conclusions: This study showed that spontaneous ovulation occurs in association with an oxidative state in healthy women and women with PCOS, and women with PCOS following treatment with clomiphene citrate.Hitit UniversityHitit University [TIP19001.18.001]This study was supported by Hitit University (Grant No: TIP19001.18.001

The Burden of Caregivers of Stroke Patients and the Factors Affecting the Burden

WOS: 000320972700012Objective: The study was designed to determine the burden of caregivers of stroke patients and the factors affecting the burden. Methods: This descriptive research was conducted at Turkey Izmir Ataturk Education and Research Hospital, Clinic for Neurology with the participation of 80 caregivers who agreed to take part in the research between January 15 and March 15, 2007. Data were collected using an introductory information form and the Caregiver Burden Inventory. Results: The average Caregiver Burden Inventory subscales scores were time-addiction burden 15.31 +/- 4.07, developmental burden 8.19 +/- 4.46, physical burden 6.88 +/- 3.93, social burden 5.55 +/- 4.40, emotional burden 3.44 +/- 4.25. The average total burden score was 39.36 +/- 13.83. There was found relationship between the ages of caregivers and the time-addiction burden; the social security and emotional and total burden; the requesting state to receive caregiver training and emotional burden; and the encountered difficulties in coping strategies and the average score for the physical burden subscale (p<0.05). Conclusion: In accordance with the aforementioned results, it has been concluded that taking care of a family member in need is perceived as a task and responsibility in Turkish society. Parallel to this, caregivers are not aware of their burden throughout the process and have difficulty in expressing the hardships they experience

Covid-19 Pandemisi Sürecinde Ortaokula Devam Eden ve Covıd-19 Geçiren Çocukların Duygu ve Düşünceleri

Bu çalışmada, COVID-19 pandemisi sürecinde ortaokula devam eden ve COVID-19 geçiren çocukların duygu ve düşüncelerine yer verilmiştir. Bu kapsamda, çocuklara yedi soru sorulmuş ve alınan cevaplar nitel araştırma modeline uygun olarak analiz edilmiştir. Araştırmanın çalışma grubu, amaçlı örnekleme yöntemi ile seçilen 10 çocuktan oluşmaktadır. Araştırmaya katılan çocukların beşi erkek (%50), beşi kızdır (%50). Bununla birlikte araştırmaya katılan çocukların yaşları 10-11 yaş aralığındadır. Bu araştırmada, yarı yapılandırılmış görüşme tekniğinden yararlanılmıştır. Veri analizi gerçekleştirilirken Maxqda 2020 analiz programı kullanılmıştır. Araştırma sonuçlarına göre, COVID-19 salgını sürecinde karantinada olan çocuklar kızgınlık ve üzüntü gibi olumsuz duyguları yoğunlukla hissettiklerini, koronavirüsü en fazla gribe ve kötü adamlara benzettikleri, karantinada kaldıkları sürede en fazla dersleri, teknolojik aletler ile, oyun oynayarak ve odada tek başına sıkılarak vakit geçirdikleri, özgürlüklerinin kısıtlanmasından rahatsız oldukları, evde sıkıldıkları; aile, akraba ve arkadaş gibi yakın çevreleriyle birlikte dışarıda olmayı, özgürce oyun oynamayı ve sarılmayı çok özledikleri ortaya çıkmıştır. Araştırma bulguları, alanyazındaki çalışmalar incelenerek desteklenmiştirIn this study, the feelings and thoughts of children who were secondary school students and who had COVID-19 disease were investigated. In this context, seven questions were asked to the children and the answers were analyzed in accordance with the qualitative research model. The study group of the research consists of 10 children selected by purposeful sampling method. Five boys and five girls participated in the study. In addition, the ages of the children are between 10-11. In this study, semi-structured interview technique was used. In data analysis, Maxqda 2020 analysis program was used. According to the results of the research, children who were in quarantine during the COVID-19 outbreak intensely felt negative emotions such as anger and sadness. They likened coronavirus to flu and bad guys the most. During the quarantine process, they spent time with lessons and technological equipment. They stated that they spent time playing games and alone in the room. They were also uncomfortable with the restriction of their freedom, bored at home. It was revealed that they missed being outside, playing freely and hugging together with their family, relatives and friends. Research findings were supported by being examined the studies in the literature