36 research outputs found
Hydrogeochemistry and Geothermometry of the Ilgin Geothermal Field, Central Turkey
No full textThe Ilgin geothermal field that is the oldest and most important spa of the Konya Region is located in Central Turkey. The Ilgin geothermal field has five geothermal wells and three hot water springs with flow rates of 40-130 L/s, temperatures 26- 42 degrees C and depths of 120-300 m. In the present study, detailed hydrogeochemical investigations are carried out to understand the geothermal energy potential of the thermal waters. The chemical properties of the cold and hot waters collected from the field were determined and the classification and usage possibilities of the waters were investigated. The thermal well water samples have the same Cl, B and Li con-centrations in rainy and dry seasons, but those of the other samples are variable in rainy and dry seasons. This suggests the surface water mixtures were constant in hot water wells or that the precipitation times were long. In the Li-Rb-Cs diagram, the Li/Cs ratios of hot waters are 6.53-8.61 in the rainy period and 6.28-8.47 in the dry period, indicating that they are derived from acidic rocks. According to their isotopic composition, it can be said that the waters are of meteoric origin. According to the Langelier, the Ryznar and the Puckorius Saturation Indexes, the waters can precipitate carbonate. The waters interacted with gypsum and anhydrite zones based on the Halite Saturation Index, while the waters are associated with dolomite-rich rocks in terms of the Dolomite Saturation Index. Silica and cation geothermometers except Na-K applicated to the Ilgin geothermal waters yielded similar reservoir temperature estimates (e.g., 13-76 degrees C for rainy period, 10-80 degrees C for dry period). However, reser-voir temperature from the other estimates (Na-K geothermometers, enthalpy-chloride diagram and enthalpy-silica mixture model) are higher than 103 degrees C. Taken as whole, the temperature estimates exhibit little agreement between the different geothermo-metry calculations suggesting that the Ilgin geothermal waters represent immature waters, and water-rock equilibrium in the geothermal reservoir was not fully attained.ACKNOWLEDGMENTS This study was financially supported by Konya Technical University Scientific Research Projects (BAP) (Project no. 18401099) (Konya, Turkey). The author thanks to the editor Dr. Tatsuki Tsujimori and two anonymous reviewers for their critical and constructive comments that improved the quality of this paper.Konya Technical University Scientific Research Projects (BAP) [18401099
Risk Factors for Gestational Diabetes in Women with Polycystic Ovarian Syndrome
No full textWe aimed to compare the pre-gestational metabolic states of the women who were previously diagnosed with policystic ovarian syndrome and had gestational diabetes mellitus in the subsequent pregnancy and who did not have gestational diabetes mellitus in subsequent pregnancy and to determine the independent variables that predict the gestational diabetes mellitus risk for policystic ovarian syndrome patients in the subsequent pregnancy. Between the dates 2007 and 2012, the patients who were diagnosed with policystic ovarian syndrome in our outpatient gynecology clinic were searched retrospectively. Then these patients were called for pregnancy states. All of these patients have pregnancy spontaneously. The patients pre-gestational mean age, body mass index, metabolic and hormonal profiles and pregnancy outcomes were compared between policystic ovarian syndrome cases who developed gestational diabetes mellitus or not. We found some differences in pregestational metabolic states between the policystic ovarian syndrome patients who developed gestational diabetes mellitus in pregnancy or not. The mean age, body mass index, very low density lipoprotein, triglyceride, fasting insulin, fasting c-peptide levels, 1st and 2nd hour glucose levels in 75 gr oral glucose tolerance test, homeostatsis model assessment insulin resistance measures and neonates birth weights were higher in gestational diabetes mellitus group than non-gestational diabetes mellitus group. But high density lipoprotein was lower in gestational diabetes mellitus group than non- gestational diabetes mellitus group. There were no differences between the mean levels C- reactive protein, hormonal profile, mean fasting glucose, low density lipoprotein cholesterol, total cholesterol levels and mode of delivery. Glucose intolerance was significantly higher in the gestational diabetes mellitus group (%74,07 vs %6,66). With the multipl logistic regression analysis we found the body mass index as the strongest independent predictor of gestational diabetes mellitus in policystic ovarian syndrome patients (OR: 2,831, %95 CI: 1,234-6,495). The second independent predictor was the high 2nd hour glucose level in oral glucose tolerance test(OR: 1,119, %95 CI: 1,026-1,221). The pre-gestational metabolic variables including the age, body mass index, lipid profile, and glucose metabolism are significantly different in the gestational diabetes mellitus group than the non-gestational diabetes mellitus group. The obesity and glucose intolerance are the independent predictors of gestational diabetes mellitus in policystic ovarian syndrome cases. [Med-Science 2016; 5(1.000): 179-90
Presumed nasolacrimal endometriosis
No full textA 13-year-old girl was admitted with a complaint of cyclic bleeding from the left inferior punctum with menstruation. Crusted hemorrhage was noticed in the tear meniscus of the left eye and just inferior to the left caruncle. With gradient-echo magnetic resonance imaging, the hemorrhagic tissue in the nasolacrimal canal was demonstrated and the diagnosis of nasolacrimal endometriosis was made. Nasolacrimal endometriosis is a rare ocular condition. Its management and histologic diagnosis remain challenging
Synthesis of Cyclodextrin-Based Multifunctional Biocompatible Hydrogels and Their Use in the Prevention of Intrauterine Adhesions (Asherman's Syndrome) after Surgical Injury
No full textAsherman's syndrome, which can occur during the regeneration of damaged uterine tissue after surgical interventions, is a significant health problem in women. This study aimed to acquire and characterize cyclodextrin-based hydrogels, which can be used to prevent Asherman's syndrome, and investigate their effectiveness with biomedical applications. A series of hydrogels were synthesized from the cross-linking of beta-cyclodextrin and different polyphenols with epoxy-functional PEG. Their chemical, physical, and biological properties were subsequently determined. The results demonstrated that the cyclodextrin-based hydrogels had a porous structure, high swelling ratio, good injectability, drug release ability, and antioxidant activity. Cell culture results illustrated that the hydrogels had no significant cytotoxicity toward L929 fibroblast cells. Considering all properties, the beta-CD-PEG-600-Ec hydrogel showed the most satisfactory properties rather than other ones. The potential of this hydrogel in preventing Asherman's syndrome was evaluated in a rat model. The results revealed that the beta-estradiol- and melatonin-loaded cyclodextrin-based multifunctional hydrogel group both structurally and mechanically showed an antiadhesion effect in the uterus and a therapeutic effect on the damage with the beta-estradiol and melatonin that it contains compared to the Asherman (ASH) group. This double drug-loaded hydrogel can be a promising candidate for preventing Asherman's syndrome due to its versatile properties
Molar volume calculated at various pressures and the Pippard relations close to the melting point in benzene
No full textTarı İlgin, Özlem (Arel Author)The molar volume of solid and liquid benzene was calculated at various pressures (at constant temperatures), and the Pippard relations were examined close to the melting point in this organic molecule. The molar volume calculated is in good agreement with the observed data, which decreases as the pressure increases up to about 150 MPa. The Pippard relations are also valid within this pressure range at constant temperatures studied here for the solid and liquid phases of benzene
Germline cells in ovarian surface epithelium of mammalians: a promising notion
No full textAbstract It is a long held doctrine in reproductive biology that women are born with a finite number of oocytes and there is no oogenesis during the postnatal period. However, recent evidence challenges this by showing the presence of germ line stem cells in the human ovarian surface epithelium (OSE), which can serve as a source of germ cells, and differentiate into oocyte like structures. Postnatal renewal of oocytes may have enormous therapeutic potential especially in women facing the risk of premature ovarian failure idiopathically or iatrogenically after exposure to gonadotoxic chemotherapy and radiation for cancer therapy. This article reviews current knowledge on germ line stem cells in human OSE.</p
Comparison of awarded university business incubators: Italy and Turkey.
No full textBased on the diffusion and the effects of university business incubators this thesis work
examining university business incubators based on their networking activities in respect to
different geographical scopes and intentions of the networking. A large and growing body of
literature has investigated on networking activities of university business incubators and
outputs of networked incubators. Networking is one of the main competitive advantages of all
models of business incubators and also it has a huge impact on the development of the
entrepreneurial environment. However, to the author ́s best knowledge, very few publications
can be found available in the literature that addresses the issue of the geographical scope of
networking how it differentiates its’ development structure. Due to this reason, the objective of
this thesis is aiming to analysis the networking activities in different geographical scopes; local,
national and international and how do they structure in two different countries. Sample
university business incubators are from two different countries, one from ‘developed country’
and one from ‘developing country’ to illustrate the main partners of both incubators according
to their geographical scopes, how do they create those partnerships, what are the main activities
that they realize together, is there any intermediate third parties and government policies behind
of it. What kind of activities are conducting in both university business incubators in order to
become more international and finally in respect to their networking activities what kind of
industrial partners both UBIs have and how do they create those relationships.
This study has determined the relationship between all the partners of a university business
incubator and incubator itself. In consideration of previous academic studies about the topic
and contributions of this thesis work, now we can gain a better understanding of cause-effect
relation of partnership choices and activities in diversified geographical scopes of a university
business incubator
Association of folic acid receptor α in maternal serum with neural tube defects
No full textObjective: To evaluate whether serum folic receptor α levels are changed in women whose previous pregnancies were complicated with neural tube defects (NTDs). Methods: This was a case-control study that included 41 women as the control group who had previously had at least one healthy pregnancy and 37 women as the study group who had a previous pregnancy complicated with NTDs. Blood samples were obtained from all of the participants six weeks after the termination of pregnancy or delivery of a baby. Serum folate receptor α concentrations were analyzed using a commercially available enzyme-linked immunosorbent assay (ELISA) kit. Results: The mean concentrations of serum folate receptor α were significantly lower in the NTD cases compared to those in the control group (p=0.02). There was no significant difference in mean serum folate titers between the NTD cases and the control group (p=0.07). Conclusion: Low serum folic acid receptor α levels in the current study did not appear to be a regulatory marker of maternal folate homeostasis per se but rather a factor that contributed to the development of NTDs. © 2014 Informa UK Ltd
Comparison of awarded university business incubators: Italy and Turkey.
No full textBased on the diffusion and the effects of university business incubators this thesis work
examining university business incubators based on their networking activities in respect to
different geographical scopes and intentions of the networking. A large and growing body of
literature has investigated on networking activities of university business incubators and
outputs of networked incubators. Networking is one of the main competitive advantages of all
models of business incubators and also it has a huge impact on the development of the
entrepreneurial environment. However, to the author ́s best knowledge, very few publications
can be found available in the literature that addresses the issue of the geographical scope of
networking how it differentiates its’ development structure. Due to this reason, the objective of
this thesis is aiming to analysis the networking activities in different geographical scopes; local,
national and international and how do they structure in two different countries. Sample
university business incubators are from two different countries, one from ‘developed country’
and one from ‘developing country’ to illustrate the main partners of both incubators according
to their geographical scopes, how do they create those partnerships, what are the main activities
that they realize together, is there any intermediate third parties and government policies behind
of it. What kind of activities are conducting in both university business incubators in order to
become more international and finally in respect to their networking activities what kind of
industrial partners both UBIs have and how do they create those relationships.
This study has determined the relationship between all the partners of a university business
incubator and incubator itself. In consideration of previous academic studies about the topic
and contributions of this thesis work, now we can gain a better understanding of cause-effect
relation of partnership choices and activities in diversified geographical scopes of a university
business incubator.ope
