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1-MCP, low O2 and high CO2 reduce disorders and extend vase life of "Rosalin" gerberas during storage
(Taylor and Francis, 2013-03) Akbudak, Bülent; Murat, Şenay; Ziraat Fakültesi; Tarla Bitkileri Bölümü; 56253171700; 55484924000
The hormone ethylene performs an important function in the processes related to the senescence of cut flowers, and, in particular, anti-ethylene treatments are recommended to extend the vase life of orchids. Among the treatments currently used for such postharvest treatment, 1-methylcyclopropene (1-MCP) is an efficient inhibitor of the autocatalytic production of ethylene. Although postharvest 1-MCP treatment is used to counter ethylene activity and delay senescence in fresh produce, its potential application in cut flowers has not been adequately tested. The objective of this study was to investigate the effect of 1-MCP treatment with modified atmosphere packaging on the shelf life of cut Rosalin gerberas. To this end, gerberas harvested at commercial maturity were divided into two groups: 1-MCP treatment (625 ppb at 4 +/- 1 degrees C for 4 hours) and no treatment. Both groups of flowers were stored under normal and modified atmosphere conditions at 4 +/- 1 degrees C and 80 +/- 5% relative humidity. The flowers were covered with materials of different characteristics for the modified atmosphere. To determine the differences between the treatments, quality parameters were examined in the flowers at 7-day intervals during the storage. The 1-MCP treatment with both the normal and modified atmosphere significantly reduced the overall postharvest loss in quality. The best results for the quality characteristics determined were obtained from the 1-MCP and 30 mu m polyvinylchloride combined treatment. These results indicate that 1-MCP and a modified atmosphere treatment are good methods for extending the vase life, maintaining the visual quality, and reducing the loss of quality of gerberas.
12-week acute phase results from storm (study of treatment outcomes relating to mania)
(Cambridge Univ Press, 2006-07-01) Treuer, T.; Oruç, L.; Loza, N.; El Saidi, M. A.; Kovacs, Z.; Akkaya, C.; Gülseren, S.; McElroy, H. J.; Harrison, G. A.; AKKAYA, CENGİZ; Tıp Fakültesi; Psikiyatri Ana Bilim Dalı; EKJ-8427-2022
15 and 30 w holmium: Yag laser lithotriptor in ureteroscopic lithotripsy: Which one is more effective and safe?
(Mary Ann Liebert, 2021-05-05) Kaygısız, Onur; Aydın, Yavuz Mert; Çicek, Mehmet Çağatay; Çelen, Sinan; Coşkun, Burhan; Kılıçarslan, Hakan; Kaygısız, Onur; KAYGISIZ, ONUR; Aydın, Yavuz Mert; AYDIN, YAVUZ MERT; Çicek, Mehmet Çağatay; ÇİÇEK, MEHMET ÇAĞATAY; Coşkun, Burhan; COŞKUN, BURHAN; Kılıçarslan, Hakan; KILIÇARSLAN, HAKAN; Tıp Fakültesi; Üroloji Ana Bilim Dalı; 0000-0002-9790-7295; 0000-0002-6287-6767; 0000-0002-0471-5404; 0000-0002-8242-9921; JCO-5169-2023; AFP-3055-2022; L-9439-2019
Background: Holmium:yttrium-aluminium-garnet (Ho:YAG) laser lithotripsy with ureteroscopy (URS) was a safe and successful treatment option for pediatric ureteral stones. We aimed to comparatively evaluate the outcomes of 15 and 30 W Ho:YAG laser lithotriptors in pediatric ureter stones.Materials and Methods: We retrospectively evaluated 55 children who underwent ureteroscopic laser lithotripsy to treat ureter stone size up to 15 mm between September 2009 and March 2020. Groups were formed according to the laser lithotriptor power 15 W (Group 15: n = 32), 30 W (Group 30: n = 23). The efficiency of laser lithotriptors was compared between the groups.Results: The age, gender, and stone characteristics (longest stone diameter, density, location and multiple stones) were similar between the groups. In the postop first month, stone-free status was achieved in all cases except one child in Group 15. The median operative time was significantly shorter in Group 30 (40 minutes) than in Group 15 (52.5 minutes) (P = .010). Clavien-Dindo class (CDC) 2 complications occurred in 2 children in both groups (P = .597). Although ureteric stenosis was observed in 1 patient in Group 15, no ureteric stenosis was seen in Group 30 during follow-up (median 16.1 months). Length of hospital stay (LoHS) and stone-free rates were similar between groups.Conclusion: URS with 15 and 30 W Ho:YAG laser lithotriptors is an effective treatment option for pediatric ureteral stones with a high success rate and low complication rates. In brief, 30 W Ho:YAG laser lithotriptors should be preferred over 15 W lithotriptors due to their shorter operative time with similar success rate.
195 hand injuries in 12 days: The outcomes of the feast of sacrifice
(Iranian Plastic & Reconstructive Surgery Assoc, 2016-05-01) Akın, Selçuk; AKIN, SELÇUK; Ersen, Burak; Saki, Mehmet Can; Tunali, Orhan; Köse, Mehmet; Aksu, Ismail; Tıp Fakültesi; 0000-0002-3003-918X; AAH-5064-2021
1998-2005 yılları arasında Türkiye'de 5 farklı bölgedeki üniversitelerin Adli Tıp Anabilim dallarında raporladırılan yaş tayini olgularının i̇rdelenmesi
(Ortadoğu Yayınları, 2009-04) Baransel, Aysun; Büken, Bora; Tokdemir, Mehmet; Dülger, Hikmet Ergin; Erel, Özlem; Fedakar, Recep; Tıp Fakültesi; Adli Tıp Ana Bilim Dalı; AAH-6287-2021; 8725968900
Adli tıpta yaş tayini, gerek canlıda gerekse ölüde kimlik tespitinde yaygın olarak kullanılmakta ve cezai ve hukuki sorumluluğun belirlenmesinde çok önemli bir yer tutmaktadır. Yaş tayininde, günlük uygulamada sıklıkla kullanılan yöntem, fiziksel muayene ile birlikte, kemik gelişiminin radyolojik olarak görüntülenmesi ve hazırlanmış atlaslara uyarlanarak kemik yaşının tespiti esasına dayanmaktadır. Çalışmamızda Türkiye’de yaş tayininde yaygın olarak kullanılan ve 5 ayrı coğrafi bölgede bulunan Gaziantep, Fırat, Adnan Menderes, Uludağ ve Düzce Üniversitelerinin Adli Tıp Anabilim Dalı Başkanlıkları tarafından da kıstas alınan “Gök Atlası”na göre yaş verilerinin değerlendirilerek irdelenmesi amaçlanmıştır. Gereç ve Yöntemler: Bu çalışmada, 1998-2005 tarihleri arasında çeşitli nedenlerle mahkeme tarafından yaş tayini istenen 275’i erkek, 312’si kadın toplam 587 olgu değerlendirmeye alındı. Radyolojik inceleme ile çeşitli yaş gruplandırılmaları yapılarak kronolojik yaş ve kemik yaşı arasındaki uyum veya farklılık olup olmadığı araştırıldı. Bulgular: 0-12 yaş grubuna giren 39 olgunun 31 (%79.5)’inin kemik yaşı kronolojik yaşından büyük, 6 (%15.4)’sının kemik yaşı kronolojik yaşı ile uyumlu ve 2 (%5.1)’sinin kemik yaşı kronolojik yaşından küçük bulundu. 13-22 yaş grubunda kronolojik yaşa göre ileri düzeyde kemik gelişimi olguların %79.8’inde, kronolojik yaşa göre geri kalmış kemik gelişimi %9.6’sında ve kemik ve kronolojik yaş uyumu %10.6’sında tespit edildi. Sonuç: Bu çalışmada, puberte dönemindeki fiziksel gelişmenin kemik gelişimi üzerindeki önemli etkisi ve kesin yaş tayini yapılamayan puberte sonrası ileri yaşlarda yeni ve gelişmiş tekniklerin rutin uygulamada kullanılması gerektiği vurgulandı. Özellikle toplumumuza özgü atlasın bir an önce hazırlanması gerektiği sonucuna varıldı.
19th century Greek churches of Mudanya
(Ege Univ, 2019-10-01) Aydın, Ersin; Özügül, Ayşin; ÖZÜGÜL, AYŞİN; 0000-0001-6463-2080; AAH-6690-2021
Until 1924, the majority of the population of Mudanya, one of the towns that Ottomans first conquered in Bithynia (1321), was composed of Greeks. The existence of many Greek churches in Mudanya is known both from written sources and from surviving buildings. Two of the ten churches rebuilt are used as cultural centers. The walls of the three churches whose roofs have been destroyed are about to collapse. Only one of the other five churches has extant with a height of about one meter. In the Ottoman period, except for the exceptions, the new church was not built until the 19th century, the churches belonging to the Byzantine and pre 19th-century Ottoman periods were repaired to and used with the permission of the sultan. Owing to the reform brought by the Edicts of Tanzimat (1839) and Islahat (1856), the foundations of small-size churches that were demolished were rebuilt on a larger scale. In the Ottoman archives, the documents related to these churches include the reasons for reconstruction, their size, the cost of construction and how this cost will be met, as well as the community population that will use the church, as well as the ground floor plan and front view drawings of some churches. All of the Greek churches in Mudanya have basilica plan, door and window openings with round arches, as well as columns, arches and inner roofs of the naos, have been constructed of wood. The facade arrangement and decorations of the church buildings in Mudanya which have close similarities with the contemporary Greek churches of Bursa and Istanbul, are in eclectic style.
1st and 2nd law characteristics in a micropipe: Integrated effects of surface roughness, heat flux and reynolds number
(Taylor&Francis, 2009) Özalp, A. Alper; Mühendislik Fakültesi; Makine Mühendisliği Bölümü; 0000-0002-4976-9027; ABI-6888-2020; 6506131689
A computational study of the integrated effects of surface roughness, heat flux, and Reynolds number on the 1st and 2nd law characteristics of laminar-transitional flow in a micropipe is presented. Analyses are carried by solving the variable fluid property continuity, Navier-Stokes, and energy equations for the surface roughness, heat flux, and Reynolds number ranges of 1-50 m, 5-100 W/m2, and 1-2000, respectively. Computations put forward that surface roughness not only accelerates transition to lower Reynolds number but also augments heat transfer rates, such that the transitional Reynolds numbers and intermittency values are evaluated as 1650, 575, and 450 and 0.132, 0.117, and 0.136 for the surface roughness cases of 1, 20, and 50 m, respectively. Thermocritical Reynolds numbers are identified by determining the viscous dissipation rates, which characterize the heating/cooling behavior and the related Reynolds number range. Surface roughness comes out to have no role on entropy generation at low Reynolds numbers; moreover, entropy generation is found to be inversely proportional with mean temperature variation, where the trends become almost asymptotic at the lower limit of the investigated Reynolds number range. Being independent of surface roughness, heat flux, and Reynolds number, radial irreversibility distribution ratio is determined to be negligible at the pipe centerline, indicating that the frictional entropy is minor and the major portion of the total entropy generation is thermal based.
21st-century skills as predictors of pre- service teachers' professional qualifications: A cross-sectional study
(Necmettin Erbakan Üniversitesi, 2023-01-01) Yurt, Eyüp; YURT, EYÜP; Bursa Uludağ Üniversitesi; 0000-0003-4732-6879; JPK-4403-2023
This study aimed to determine the impact of teacher candidates' 21st-century skills on their professional competence by controlling for gender, grade level, and income status. Three hundred eighty teacher candidates from different classes and departments were selected to participate in the study. The data obtained using the Multidimensional 21st-Century Skills and Professional Competence Scales were analyzed using the structural equation modeling method. The results indicate that teacher candidates' 21st-century skills positively affect their professional competence when controlling for gender, grade level, and income status. The findings emphasize the importance of pre-service teachers for their future careers to have 21st-century skills such as information and technology literacy, critical thinking and problem-solving, entrepreneurship and innovation, social responsibility and leadership, and career consciousness. It has been concluded that teacher training programs should be designed to support teacher candidates in acquiring 21st-century skills and developing their professional competencies.
25-hydroxyvitamin D levels in non-small cell lung cancer patients
(Wiley, 2018-12-01) Sahintürk, Serdar; Sahintürk, Kadriye; ŞAHİNTÜRK, SERDAR; Fen Edebiyat Fakültesi; Fizik Bölümü; 0000-0002-7612-0055; ACQ-9887-2022
2D finite-element analysis of interlaminar flux density distribution at joints of zip-type unicore
(Elsevier, 2006-09) Moses, Anthony; Erdem, Sezer; Derebaşı, Naim; Uludağ Üniversitesi; 0000-0003-2546-0022; AAI-2254-2021; AAI-1248-2021; 13805689400; 11540936300
Normal flux distribution along the rolling directions at joints of overlapped stacked electrical laminations is investigated to set up a flux distribution similar to that in the zip-type unicore. A 2D model of a C-core and three layers of overlapped laminations with joints with similar characterisitics to a zip-type unicore were formed and an FE analysis was carried out to solve the problem using a static magnetic analysis and unidirectional vector potential formulation. The results show that when the reluctance changes in the closed magnetic paths causes the flux deviates towards shorter magnetic paths moving to adjacent layers increasing the magnetic flux density. This redistribution causes the flux to transfer easier at joints in the unicore compared to other jointed cores.
2D holodirected lead(II) bromide coordination polymers constructed of rigid and flexible ligands
(Elsevier Science, 2009-04-01) Aslani, Alireza; Morsali, Ali; Büyükgüngör, Orhan; Yılmaz, Veysel Turan; Fen Edebiyat Fakültesi; Kimya Ana Bilim Dalı; 0000-0002-2849-3332; L-7238-2018; 7006269202
Three new 2D Pb-II coordination polymers containing 4,4'-bipyridine (4,4'-bipy), 1,2-bis(4-pyridyl)ethane (bpa) and 1,2-bis(4-pyridyl) ethene (bpe) with bromide anions, [Pb(mu-4,4'-bipy)(mu-Br)(2)](n) (1), [Pb(mu-bpa)(mu-Br)(2)](n) (2) and [Pb(mu-bpe)(mu-Br)(2)](n) ( 3) have been synthesized and characterized by elemental analysis, IR spectroscopy and their structures studied by X-ray crystallography. The thermal stability of compounds 1-3 was studied by thermal gravimetric (TG) and differential thermal analyses ( DTA). The single-crystal X-ray data shows that the Pb2+-ions have coordination numbers of six and contain the rarely holodirected geometries.
2D Magnetic texture analysis of Co-Cu films
(Walter de Gruyter Gmbh, 2017-05-01) Bayırlı, Mehmet; Karaağaç, Öznur; Koçkar, Hakan; Alper, Mursel; Fen Edebiyat Fakültesi; Fizik Bölümü; AAG-8795-2021; 7005719283
The magnetic textures for the produced magnetic materials are important concepts in accordance with technical applications. Therefore, the aim of this article is to determine 2D magnetic textures of electrodeposited Co-Cu films by the measurement of hysteresis loops at the incremented angles. For that, Co-Cu films were deposited with different Co2+ in the electrolyte. In addition, the easy-axis orientation in the films from the squareness values of the angles, M-p(beta) obtained by the hysteresis loops have been numerically studied using the Fourier series analysis. The differences observed in the magnetic easy-axis distributions were attributed to changes of the incorporation of Co2+ in the films with the change of Co2+ in the electrolyte. The coefficients of Fourier series (A(0) and A(2n)) were also computed for 2D films. It is seen that a systematic and small decrease in A(0) and an obvious decrease in A(2n) (n = 1) were observed with increasing incorporated Co in the films. Results imply that interactions cause slightly demagnetization effect accordance with higher incorporation of Co in the films. Furthermore, the crystal structure of the Co-Cu films analysed by X-ray diffraction revealed that the films have dominantly face-centred cubic structure. Film contents analysed by energy-dispersive X-ray spectroscopy and film morphologies observed by scanning electron microscope also support the magnetic texture analysis results found by numerical computation.
2d Temperature analysis of energy and exergy characteristics of laminar steady flow across a square cylinder under strong blockage
(MDPI, 2015-05-01) Korukçu, Mehmet Özgün; KORUKÇU, MEHMET ÖZGÜN; Mühendislik Fakültesi; Makine Mühendisliği Bölümü; JAO-3455-2023
Energy and exergy characteristics of a square cylinder (SC) in confined flow are investigated computationally by numerically handling the steady-state continuity, Navier-Stokes and energy equations in the Reynolds number range of Re = 10-50, where the blockage ratio ( = B/H) is kept constant at the high level of = 0.8. Computations indicated for the upstream region that, the mean non-dimensional streamwise (u/U-o) and spanwise (v/U-o) velocities attain the values of u/U-o = 0.8400.879 and v/U-o = 0.2360.386 (Re = 1050) on the front-surface of the SC, implying that Reynolds number and blockage have stronger impact on the spanwise momentum activity. It is determined that flows with high Reynolds number interact with the front-surface of the SC developing thinner thermal boundary layers and greater temperature gradients, which promotes the thermal entropy generation values as well. The strict guidance of the throat, not only resulted in the fully developed flow character, but also imposed additional cooling; such that the analysis pointed out the drop of duct wall (y = 0.025 m) non-dimensional temperature values () from = 0.3870.926 (Re = 1050) at x(th) = 0 mm to = 0.0020.266 at x(th) = 40 mm. In the downstream region, spanwise thermal disturbances are evaluated to be most inspectable in the vortex driven region, where the temperature values show decrease trends in the spanwise direction. In the corresponding domain, exergy destruction is determined to grow with Reynolds number and decrease in the streamwise direction (x(ds) = 010 mm). Besides, asymmetric entropy distributions as well were recorded due to the comprehensive mixing caused by the vortex system.
30 years retrospective review of tuberculosis cases in a tuberculosis dispensary in Bursa/Nilufer, Turkey (1985-2014): Changes of epidemics
(Mattioli 1885, 2016-10-23) Özgüç, Sedef; Yıldız, Timur; Pala, Kayıhan; Gerçek, Harika; Taş, Tuncay Aydın; Çakır, Rukiye; Tıp Fakültesi; Halk Sağlığı Ana Bilim Dalı; 0000-0002-0983-4904; 0000-0002-3816-4874; F-7816-2013; 6603159416; 36543842000; 57193114540; 56414706200
Objective: The aim of this study is to describe the epidemiological and clinical aspects of patients who applied to the Bursa Nilufer Tuberculosis Dispensary by investigating the trends in epidemics over three decades. Method: In this retrospective observational study, the records of all tuberculosis cases (1630 patients) treated in the last 30 years (1985-2014) at the Bursa Nilufer Tuberculosis Dispensary were examined and statistically analyzed. Results: Males comprised 65.2% of the patients. The ages of the patients ranged from 1 to 87 years, and the mean age was 37.4 (95% CI: 36.6-38.2). Among the cases, 86.7% were new infections and 74.1% were pulmonary tuberculosis. In the last decade, the education level, the percentage of patients who had received a BCG vaccination, the proportion of women and active employees among them increased (p<0.05), while it decreased among men (p<0.05). Clinical symptoms accompanying TB such as weakness, anorexia, weight loss, and cough, decreased to a statistically significant degree (p<0.05). In the last decade, the mortality rate was 3.6% and increased compared with previous decades (p<0.05). Mortality was higher among patients who were elderly, male, did not have a BCG scar or had a chronic disease (p<0.05). Conclusion: This study adds information about the change of TB epidemics in Turkey in the last 30 years. Further studies are needed to determine the risk factors associated with tuberculosis mortality and to evaluate the effectiveness control programs of this disease.
A 4 year retrospective analysis of our patients with mushroom poisoning
(Sage, 2013-03) Köksal, Özlem; Armaǧan, Erol; İnal, Taylan; Ayyıldız, Talat; Öner, Nuran; Tıp Fakültesi; Tıp Fakültesi; Acil Tıp Ana Bilim Dalı; Gastroenteroloji Ana Bilim Dalı; 0000-0003-2271-5659; AAH-8846-2021; AAK-8332-2020; 23389880200; 6506464232; 55695563500; 6603155277; 55695552500
Objective: This study presented the demographic, clinical and laboratory data for the patients who presented to our emergency department (ED) with mushroom poisoning. Methods: We retrospectively examined the data for adult patients with mushroom poisoning that presented to the ED of Uludag University, Faculty of Medicine between 1 January 2007 and 31 December 2010. Results: A total of 53 patients were enrolled in the study. The mean age was 46.58 +/- 15.47. 52.8% of the patients were female, while 47.2% were male. These patients were typically admitted in the autumn. The most commonly seen symptoms were gastrointestinal such as nausea and vomiting. The time to symptom onset was <6 hours for 30.2% of the patients and >6 hours in 69.8% of the patients. While 73.5% of the patients received gastric lavage, activated charcoal and intravenous fluid therapy, 15.1% received penicillin, N-acetylcysteine and intravenous fluid therapy. For the remaining patients (11.4%) silibinin, dialysis and plasmapheresis were administered. While 35.8% of the patients were hospitalised, 64.2% were discharged from the ED. The median duration of stay in the ED was 6 hours (range: 1-27 hours); the median duration of stay among inpatients was 6 days (range: 1-36 days). Three of the hospitalised patients died, and two underwent hepatic transplantation. Conclusions: Mushroom poisoning remains an important issue that is encountered in rural areas during the rainy autumn season in our region. The condition may be fatal, but can be prevented by early and appropriate treatment.
4-(N-hydroxyphenyl)retinamide can selectively induce apoptosis in human epidermoid carcinoma cells but not in normal dermal fibroblasts
(Taylor & Francis, 2001) Wood, E. J.; Ulukaya, Engin; Kurt, Ayberk; Tıp Fakültesi; Biyokimya Ana Bilim Dalı; K-5792-2018; 6602927353; 36615287100
The retinoid 4-(N-hydroxyphenyl)retinamide (4HPR, fenretinide) has both growth inhibitory and apoptosis-inducing effects on a number of cancer cell lines in vitro and in vivo and has been entered into a number of oncological trials. However, little is known about its mechanism(s) of action or its effects on normal cells such as fibroblasts. In this study, the effects of fenretinide on both epidermoid carcinoma cells of vulva (cell line A431) and normal human dermal fibroblasts, both as monolayers and also grown in 3D cell culture systems, have been investigated. The 3D cell culture system contained normal human fibroblasts embedded in a type I collagen gel with the carcinoma cells seeded on top of the collagen gel, which mimics the epidermoid carcinoma. Fenretinide significantly inhibited the rate of DNA synthesis of carcinoma cells, while there was little effect on fibroblasts on monolayers, at 10(-6)-10(-5) M, which are clinically attainable does. Fenretinide at 5 x 10(-6) M induced apoptosis characterised by cell shrinkage, membrane blebbing, nuclear condensation and/or fragmentation, and cell detachment in carcinoma cells, but not fibroblasts from monolayers. Fenretinide also reduced the viability of carcinoma cells in the 3D cell culture system without affecting fibroblasts. These data show that fenretinide may preferentially induce apoptosis in epidermoid carcinoma cells.
4-Transitivity and 6-figures in some Moufang-Klingenberg planes
(Springer, 2006-10-31) Çelik, Basri; Akpınar, Atilla; Çiftçi, Süleyman; Fen Edebiyat Fakültesi; Matematik Bölümü; 0000-0001-7234-8063; 0000-0002-7612-2448; AAE-2600-2019; ABB-9790-2020; 23026643900; 23026537500; 26635052900
In this paper, the Moufang-Klingenberg plane over a local alternative ring R of dual numbers is studied. It is shown that its collineation group is transitive on quadrangles. It is therefore shown that the coordinatization of these Moufang-Klingenberg planes is independent of the choice of the coordinatization quadrangle. Also, the concept of 6-figures is extended to these Moufang-Klingenberg planes and it is shown that any 6-figure corresponds to only one inversible m epsilon R.
5′ MLL gene deletion in a case with childhood acute lymphoblastic leukemia
(Oxford University, 2010-02) Gülten, Tuna; Yakut, Tahsin; Güneş, Adalet Meral; Demirkaya, Metin; Tıp Fakültesi; Tıp Fakültesi; Çocuk Sağlığı ve Hastalıkları Ana Bilim Dalı; Tıbbi Genetik Ana Bilim Dalı; 6505944216; 6602802424; 24072843300; 24331130000
Myeloid/lymphoid leukemia (MLL) gene rearrangements are high risk cytogenetic characteristics of acute lymphoblastic leukemia (ALL). Translocations of this gene are well defined, and their impact on the patient's prognosis is well known, but deletions of the same region are rare, and little is known about their prognostic significance and the significance of their accompanying translocations. Here we present a case of childhood ALL with a deletion of the 5' region of the MILL gene detected by fluorescence in situ hybridization (FISH) analysis, This result also confirmed the sensitivity and efficiency of FISH analysis.
5,5-diethylbarbiturate complexes of silver with 2,2 '-bipyridine and 3-(2-pyridyl)propanol: Syntheses, crystal structures, spectroscopic, thermal and antimicrobial activity studies
(Walter de Gruyter Gmbh, 2008-02) Karakaya, Haydar; Yılmaz, Fatih; Büyükgüngör, Orhan; Yılmaz, Veysel Turan; Fen Edebiyat Fakültesi; Kimya Bölümü; 0000-0002-2849-3332; L-7238-2018; 7006269202
Two silver 5,5-diethylbarbiturate (barb) complexes with 2,2'-bipyridine (bpy) and 3-(2-pyridyl) propanol (pypr), [Ag(barb)(bpy)] (1) and [Ag(barb)(pypr)] (2), have been prepared and characterized by elemental analysis, IR spectroscopy, thermal analysis, and single crystal X-ray diffraction. Both complexes crystallize in the triclinic space group P (1) over bar with Z = 2. The barb ligand in 1 is N-coordinated and the bpy ligand acts as a bichelating ligand leading to an AgN3 tricoordination. Crystals of 1 feature a three-dimensional network based on N-H center dot center dot center dot O hydrogen bonding, pi(bpy)center dot center dot center dot pi(bpy), C-H center dot center dot center dot pi(bpy) and pi(bpy)-Ag interactions. In 2, the pypr and barb ligands behave as monodentate ligands through their N atoms, forming a distorted linear AgN2 coordination. Molecules of 2 are doubly bridged by N-H center dot center dot center dot O hydrogen bonds and further connected via O-H center dot center dot center dot O hydrogen bonds and aromatic pi(pypr)center dot center dot center dot pi(pypr) stacking interactions into a supramolecular network. Both complexes exhibit similar thermal decomposition behavior in air. The first stage corresponds to removal of the co-ligands such as bpy or pypr while the degradation of the barb moiety occurs at higher temperatures to give Ag2O. Like the barb, bpy and pypr ligands, 2 does not show any significant antimicrobial activity, but 1 is active against bacteria and fungi.
5,5-Diethylbarbiturato complexes of copper(II) with (2-aminoethyl)piperidine, -pyrrolidine, and -morpholine: Syntheses, crystal structures, spectroscopic, and thermal properties
(Taylor & Francis, 2009) Büyükgüngor, Orhan; Aksoy, Mehmet Suat; Yılmaz, Veysel Turan; Fen Edebiyat Fakültesi; Kimya Ana Bilim Dalı; 0000-0002-2849-3332; L-7238-2018; 8986297500; 7006269202
Three new complexes, [Cu(barb)2(aepip)] center dot 0.5H2O (1), [Cu(barb)2(aepyrd)] (2), and [Cu(barb)2(aemrph)] (3), have been synthesized by reaction of 5,5-diethlybarbiturate anion (barb) with copper(II) in the presence of (2-aminoethyl)piperidine (aepip), -pyrrolidine (aepyrd), and -morpholine (aemrph). All complexes were characterized by elemental analysis, spectroscopic (IR and UV/Vis), thermal (DTA-TGA), and magnetic susceptibility measurements. X-ray single crystal diffraction shows that 1 and 2 are discrete mononuclear species, in which copper(II) is coordinated by two bidentate barb ligands and a chelating aepip or aepyrd, forming a square-pyramidal coordination geometry. Complexes 1 and 2 show unequal coordination of barb, one N-coordinate, and one bidentate. Complex 3 is also mononuclear, but copper(II) is square-planar with two N-coordinated barb and one bidentate aemorph. Molecules of 1-3 are bridged by strong hydrogen bonds to generate 1-D or 2-D supramolecular networks. Spectral and thermal data for 1-3 are in agreement with crystal structures.

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