Slide Session : OS-END-44 ; Endocrinology : The Relationship Between Vitamin D and Testosterone Levels in Overweight Patients

( Ozlem Soyluk ),( Meral Mert ),( Yildiz Okuturlar ),( Samet Sayilan ),( Pinar Karakaya ),( Farid Babashov ),( Ozlem Harmankaya ),( Abaki Kumbasar ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1

Background: There are studies showing the relationship between vitamin D deficiency and obesity in the literature. Also it is known that testosterone levels decrese in obesity. So it is hypothesized that testosterone levels can increase with vitamin D replacement. We aimed to investigate this relationship between vitamin D and testosterone level in patients with BMI over 25 kg/m2. Methods: The data of 3110 patients with BMI > 25 kg /m2 are evaluated retrospectively. The relation between 25 OH vitamin D3, tetsoterone, parathormone (PTH), A1c, fasting insulin, fasting glucose, HOMA values, age, sex were examined. We compared the data of 265 women and 38 men whose records included all these parameters. Results: Mean ages are found to be 46,38±12,82 yeasr and 40,42±12,60 years in female and male patients respectively. There are no significant differences between vitamin D, PTH, B12 and HOMA levels in female and male patients. In the female group there was a negative correlation between age and 25 (OH)D3 level and in the male group there was a negative correlation between 25(OH)D3 and HOMA value. In both groups no correlation was found between 25(OH)D3 and total testosterone levels (Table-1). Conclusions: There are several studies with different results about the realtionship between vitamin D and parameters like obesity, testosterone level. In our study we could not find any relationship between Vitamin-D and testosterone levels.

Determination and Characterization of Thermostable Esterolytic Activity from a Novel Thermophiic Bacterium Anoxybacilus gonensis A4

( Ozlem Faiz ),( Ahmet Colak ),( Nagihan Saglam ),( Sabriye Canakci ),( Ali Osman Belduz ) 생화학분자생물학회 2007 BMB Reports Vol.40 No.4

Mechanical properties of zirconia after different surface treatments and repeated firings

Ozlem Kara,A. Nilgun Ozturk,Faruk Ozel,Necla Demir,Meryem Gulce Subası 대한치과보철학회 2014 The Journal of Advanced Prosthodontics Vol.6 No.6

PURPOSE This study investigated the influence of surface conditioning procedures and repeated firings on monoclinic content and strength of zirconia before cementation. MATERIALS AND METHODS Sintered bar-shaped zirconia specimens were subjected to no surface treatment (control), air abrasion, or grinding (n=21). Their roughness was evaluated using a profilometer, and microscope analysis was performed on one specimen of each group. Then, 2 or 10 repeated firings (n=10) were executed, the monoclinic content of specimens was analyzed by X-ray diffraction, and a three-point flexural strength test was performed. Surface roughness values were compared using one-way analysis of variance (ANOVA) and Tukey honestly significant difference (HSD) tests, the monoclinic content values were tested using Kruskal-Wallis and Mann-Whitney U tests, and the flexural strength values were tested using two-way ANOVA and Tukey HSD tests (P=.05). Spearman's correlation test was performed to define relationships among measured parameters. RESULTS Surface-treated specimens were rougher than untreated specimens and had a higher monoclinic content (P<.005), and the relationship between roughness and monoclinic content was significant (P<.000). Neither surface treatment nor firing significantly affected the flexural strength, but Weibull analysis showed that for the air-abraded samples the characteristic strength was significantly lower after the 10th firing than after the 2nd firing. CONCLUSION After firing, a negligible amount of monoclinic content remained on the zirconia surfaces, and rougher surfaces had higher monoclinic contents than untreated surfaces. Multiple firings could be performed if necessary, but the fracture probability could increase after multiple firings for rougher surfaces.

A Food-Borne Outbreak Caused by Salmonella Enteritidis

Ozlem Tansel,Galip Ekuklu,Metin Otkun,Müşerref Tatman Otkun,Filiz Akata,Murat Tuğrul 연세대학교의과대학 2003 Yonsei medical journal Vol.44 No.2

This study was designed to define the epidemiology of a food-borne outbreak caused by Salmonella enteritidis that affected only one squadron of a military battalion located in the vicinity of the city of Edirne in Turkey. The outbreak was analyzed by a standard surveillance form of the Centers for Disease Control and Prevention. The relationship between the eaten foods and cases was analyzed by Fisher's exact chi-square test, and odds ratios were calculated by a case-control study. The outbreak affected 60 of 168 soldiers in the squadron, 16 of whom were hospitalized. S.enteritidis was cultured in stools from 13 of the hospitalized soldiers and from 3 soldiers who had prepared the food. All strains were completely susceptible to antibiotics; their plasmid profiles were also identical. The highest attack rate detected was 55.7% in an omelet eaten 24 hours before (p < 0.001). Furthermore, it was the riskiest food according to the case-control study (ORe because they had been discarded. All of the hospitalized cases recovered, and none of the control cultures of stools yielded the pathogen after three weeks. In conclusion, although our results didn't indicate the exact source of the outbreak microbiologically, the omelet was considered to be the source based on the epidemiological proofs.

Radiological noninvasive assessment of ureteral stone impaction into the ureteric wall: A critical evaluation with objective radiological parameters

Ozlem Elibol,Kadihan Yalcin Safak,Ayse Buz,Bilal Eryildirim,Kutluhan Erdem,Kemal Sarica 대한비뇨의학회 2017 Investigative and Clinical Urology Vol.58 No.5

Purpose: To determine the predictive value of certain radiological parameters for an objective asssessment of the presence of ureteral stone impaction. Materials and Methods: Seventy-nine patients with a single proximal ureteral stones were retrieved from the departmental database. Both clinical and particularly radiological data of all cases were well evaluated on this aspect. In addition to the time period between the first colic attack and definitive management; diameter of proximal ureter and renal pelvis, longitudinal and transverse stone size, Hounsfied unit (HU) of the stone and lastly ureteral wall thickness at the impacted stone site were all carefully evaluated and noted. Results: Patients had a single proximal ureteral stone. While mean age of the cases was ranged 20 to 78 years; mean stone size was 15.62±4.26 mm. Evaluation of our data demonstrated that although there was a statistically significant correlation between ureteral wall thickness and patients age, transverse diameter of the stone, ureteral diameter just proximal to the stone, renal pelvic diameter and the duration of renal colic attacks; no correlation could be demonstrated between patients sex and the HU of the stone. Conclusions: Prediction of the presence and degree of proximal ureteral stone impaction is a challenging issue and our data indicated a highly significant correlation between ureteral wall thickness and the some certain radiological as well as clinical parameters evaluated which will give an objective information about the presence of impaction which may in turn be helpful in the follow-up and also management plans of such calculi.

Psychological Health Problems Among Adolescent Workers and Associated Factors in Istanbul, Turkey

Ozlem Koseoglu Ornek,Melek Nihal Esin 한국산업안전보건공단 산업안전보건연구원 2018 Safety and health at work Vol.9 No.1

Background: Work and work environment have a critical influence on adolescent workers’ health. They are subjected to more risks than adults. The aim of this study is to examine psychological health outcomes in adolescent workers in the areas of depression, somatization, anxiety, hostility, and negative self-concept, and to investigate any related factors. Methods: This is a descriptive and cross-sectional study. Research samples were collected from adolescent workers between 15 and 18 years old attending a 1-day mandatory education course at vocational training centers, working 5 days per week in small enterprises. Data were collected using the following instruments: Brief Symptom Inventory, Multidimensional Scale of Perceived Social Support, and Descriptive Characteristics of Children’s Assessment Form. Results: The investigation covers 837 young workers, of whom 675 were males and 162 were females. The majority of the families had low incomes (68.1%). Overall, 33.5% of the adolescents had been hospitalized because of health problems. Their average weekly working hours were 78.1 10.7. Almost 50% of adolescent workers scored above the mean average in the Brief Symptom Inventory, indicating serious pschological health symptoms.Those who scored high for hostility, depression, negative self-concept, anxiety, and somatization were between 45.4% and 48.9% of the sample. Logistic regression analysis was conducted to determine the underlying factors: a perception of “feeling very bad” health conditions was 2.07-fold whereas the rate of “no annual leave” was 0.73-fold, and both were found to be effective on psychological problems. Conclusion: In this study, it seems likely that psychological health problems are the result of multiple adverse factors including working conditions, annual leave, and health considerations.

The effect of dentin desensitizers and Nd:YAG laser pre-treatment on microtensile bond strength of selfadhesive resin cement to dentin

Ozlem Acar,Duygu Tuncer,Bulem Yuzugullu,Cigdem Celik 대한치과보철학회 2014 The Journal of Advanced Prosthodontics Vol.6 No.2

PURPOSE. The purpose of this study is to evaluate if pre-treatment with desensitizers have a negative effect on microtensile bond strength before cementing a restoration using recently introduced self-adhesive resin cement to dentin. MATERIALS AND METHODS. Thirty-five human molars’occlusal surfaces were ground to expose dentin; and were randomly grouped as (n=5); 1) Gluma-(Glutaraldehyde/HEMA) 2) Aqua-Prep F-(Fluoride), 3) Bisblock-(Oxalate), 4) Cervitec Plus-(Clorhexidine), 5) Smart protect-(Triclosan), 6) Nd:YAG laser, 7) No treatment(control). After applying the selected agent, RelyX U200 self-adhesive resin cement was used to bond composite resin blocks to dentin. All groups were subjected to thermocycling for 1000 cycles between 5-55°C. Each bonded specimen was sectioned to microbars (6 mm × 1 mm × 1 mm) (n=20). Specimens were submitted to microtensile bond strength test at a crosshead speed of 0.5 mm/min. Kolmogorov-Smirnov, Levene’ test, Kruskal–allis One-way Analysis of Variance, and Conover’ nonparametric statistical analysis were used(P<.05). RESULTS. Gluma, Smart Protect and Nd:YAG laser treatments showed comparable microtensile bond strengths compared with the control group (P>.05). The microtensile bond strengths of Aqua-Prep F, and Cervitec Plus were similar to each other but significantly lower than the control group (P<.05). Bisblock showed the lowest microtensile bond strength among all groups (P<.001). Most groups showed adhesive failure. CONCLUSION. Within the limitation of this study, it is not recommended to use Aqua-prep F, Cervitec Plus and Bisblock on dentin when used with a self-adhesive resin cement due to the decrease they cause in bond strength. Beside, pre-treatment of dentin with Gluma, Smart protect, and Nd:YAG laser do not have a negative effect.

Relationship between nonalcoholic fatty liver disease and hyperandrogenemia in adolescents with polycystic ovary syndrome

Ozlem Kara,Hanife Aysegul Arsoy,Murat Keskin 대한소아청소년과학회 2023 Clinical and Experimental Pediatrics (CEP) Vol.66 No.9

What Would Korea-US Free Trade Agreement Bring?

Ozlem Yaylaci,Serge Shikher 한국국제경제학회 2014 International Economic Journal Vol.28 No.1

This paper uses a computable model of trade to forecast the effects of the US–Korea free trade agreement on the manufacturing sector. The model uses the Eaton–Kortum methodology to explain intra-industry trade instead of the usual Armington assumption. It is parameterized using 2005 data for 15 industries and 53 countries. The results show that implementing KORUS would increase the US manufacturing exports to Korea by 56.9% and Korean manufacturing exports to the US by 18.9%. It would also increase manufacturing employment by 26,500 jobs in Korea and 34,200 jobs in the US. In addition, KORUS would lead to significant changes in the patterns of trade and production. The US and Korea would increase their specialization in the industries where they have strong technological comparative advantages. Finally, KORUS would increase welfare in both countries, but only modestly: by 0.27% in Korea and 0.013% in the US.

Skin Prick Test Reactivity in Patients with Chronic Eczematous External Otitis

Ozlem Celebi Erdivanli,K. Cagdas Kazikdas,Zerrin Ozergin Coskun,Munir Demirci 대한이비인후과학회 2011 Clinical and Experimental Otorhinolaryngology Vol.4 No.4

Objectives. To investigate the incidence of skin prick test (SPT) positivity in patients with eczematous external otitis. Methods. Forty-six patients with eczematous external otitis and forty-four healthy volunteers were included in the study. All the patients were skin-tested by prick test. Reactions were assessed by the degree of redness and swelling and the size of the wheal produced. Results. According to SPT positivity and total immunoglobulin E values, the difference between the study and the control groups was statistically significant (P<0.05). The most common skin reactions were against to mites and grasses in this study. Conclusion. Eczematous external otitis is perhaps the most difficult to treat of all forms of external otitis because the provocative agents usually remain undiagnosed. Patients suffering from eczematous external otitis symptoms should be investigated for allergens and be informed for prevention of the causative agents. SPT might be performed in cases of prolonged or treatment-resistant external otitis.