Hybrid solar cells using nanorod zinc oxide electrodes and perylene monoimide–monoanhydride dyes

Sule Erten-Ela,Sadik Cogal,Siddik Icli,Gulsah Turkmen 한국물리학회 2010 Current Applied Physics Vol.10 No.1

Hybrid solar cells have been fabricated using perylene monoimide.monoanhydride dyes with nanorod zinc oxide electrodes as electron transporting layers. We have investigated the influence of the spacer alkyl chain length of perylene monoimide.monoanhydride (PMIMA) dyes on the device performance in hybrid solar cells using nanorod zinc oxide electrodes. Nanorod zinc oxide electrodes with 50. 150 nm of diameter were synthesized in the presence of PEG400 by using microwave heating method. We observed that the dyes with longer and brunched alkyl chains exhibit higher efficiencies in hybrid solar cells. We report the highest efficiency obtained with zinc oxide nanorods under standard conditions for perylene monoimide.monoanhydride derivative with PMIMA_1 that performs 400 mV open circuit voltage, 2.81 mA/cm2 short-circuit current and 0.59% overall conversion efficiency.

Synthesis, characterization and photovoltaic properties of novel molecules based on triarylamine dyes

Sule Erten-Ela,Magdalena Marszalek,Serpil Tekoglu,Mustafa Can,Siddik Icli 한국물리학회 2010 Current Applied Physics Vol.10 No.3

We report the synthesis, electrochemical and photovoltaic properties of triphenylamine based novel organic sensitizer, comprising donor, electron-conducting and anchoring group. Different triphenylamines were synthesized as donor unit and connected to cyano-acidic acid acceptor over vinyl group. In this work, we studied on two novel dyes (TPA2, TPA3) by attaching methyl to m-position and diphenylamine to p-position of the basic triphenylamine structure, respectively. All derivatives absorb at visible region of solar spectrum in the range of 350–632 nm. By introducing strong electron injection groups to triphenylamine ring, band gap becomes narrower while EHOMO–ELUMO levels are tuned. All current voltage (I–V)measurements were done under 100 mW/㎠ light intensity and AM 1.5 conditions. TPA3 chromophore with the lowest band gap shows the best cell performance with an efficiency (η) of 4.12%, a short-circuit photocurrent density (Isc) of 8.07 mA/㎠, an open-circuit voltage (Voc) of 714 mV and a fill factor (FF) of 0.72.

Relationship Between Antimetabolite Toxicity and Pharmacogenetics in Turkish Cancer Patients

Dogan, Mutlu,Karabulut, Halil G.,Tukun, Ajlan,Demirkazik, Ahmet,Utkan, Gungor,Yalcin, Bulent,Dincol, Dilek,Akbulut, Hakan,Icli, Fikri Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.4

Introduction: Antimetabolites may cause severe toxicity and even toxic death in cancer patients. Our aim was to evaluate the relationship between antimetabolite toxicity and pharmacogenetics in patients with severe clinical toxicity or alanine transaminase (ALT) elevation after fluorouracil (5FU), capecitabine or methotrexate administration. Patients and Methods: Cancer patients with severe antimetabolite toxicity were evaluated for methylenetetrahydrofolate reductase (MTHFR) gene C667T, thymidilate synthase (TS) gene 5´UTR variable number of tandem repeats (VNTR), dihydroprymidine dehydrogenase (DPYD) gene IVS14+1G/A, Xeroderma pigmentosum (XPD) gene Lys751Gln and X-ray repair cross-complementing group 1 (XRCC1) gene Arg399Gln polymorphisms. Results: Eighteen patients were enrolled, with a male/female ratio of 0.8. They had osteosarcoma in methotrexate group (n=7), gastrointestinal malignancies in 5FU group (n=9) and breast cancer in the capecitabine group (n=2). Mucositis and dermatitis occurred in all groups, together with ALT elevation in the methotrexate group and 2 toxic deaths were encountered. DPYD, TS, MTHFR, XPD and XRCC1 gene polymorphism rare allele frequencies were observed to be higher than in the general population. Conclusion: Pharmacogenetics might contribute to tailored therapy.

Association of ABO Blood Group and Risk of Lung Cancer in a Multicenter Study in Turkey

Urun, Yuksel,Utkan, Gungor,Cangir, Ayten Kayi,Oksuzoglu, Omur Berna,Ozdemir, Nuriye,Oztuna, Derya Gokmen,Kocaman, Gokhan,Coskun, Hasan Senol,Kaplan, Muhammet Ali,Yuksel, Cabir,Demirkazik, Ahmet,Icli, Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.5

Background: The ABO blood groups and Rh factor may affect the risk of lung cancer. Materials and Methods: We analyzed 2,044 lung cancer patients with serologically confirmed ABO/Rh blood group. A group of 3,022,883 healthy blood donors of Turkish Red Crescent was identified as a control group. We compared the distributions of ABO/Rh blood group between them. Results: The median age was 62 years (range: 17-90). There was a clear male predominance (84% vs. 16%). Overall distributions of ABO blood groups were significantly different between patients and controls (p=0.01). There were also significant differences between patients and controls with respect to Rh positive vs. Rh negative (p=0.04) and O vs. non-O (p=0.002). There were no statistically significant differences of blood groups with respect to sex, age, or histology. Conclusions: In the study population, ABO blood types were associated with the lung cancer. Having non-O blood type and Rh-negative feature increased the risk of lung cancer. However, further prospective studies are necessary to define the mechanisms by which ABO blood type may influence the lung cancer risk.

Clinicopathological Features of Patients with Malignant Mesothelioma in a Multicenter, Case-Control Study: No Role for ABO-Rh Blood Groups

Utkan, Gungor,Urun, Yuksel,Cangir, Ayten Kayi,Kilic, Dalokay,Ozdemir, Nuriye Yildirim,Oztuna, Derya Gokmen,Bulut, Erhan,Arslan, Ulku Yalcintas,Kocer, Murat,Kavukcu, Sevket,Icli, Fikri Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.1

Background: Malignant mesothelioma (MM) is an aggressive tumor of mesothelial surfaces. Previous studies have observed an association between ABO blood groups and risk of certain malignancies, including pancreatic and gastric cancer; however, no information on any association with MM risk is available. The aim of this study was to investigate possible associations amoong MM clinicopathological features and ABO blood groups and Rh factor. Materials and Methods: In 252 patients with MM, the ABO blood group and Rh factor were examined and compared with the control group of 3,022,883 healthy volunteer blood donors of Turkish Red Crescent between 2004 and 2011. The relationship of blood groups with various clinicopathological features were also evaluated in the patient group. Results: The median age was 55 (range: 27-86) and 61.5% of patients were male. While 82.8% of patients had a history of exposure to asbestos, 60.7% of patients had a smoking history. Epithelioid (65.1%) was the most common histology and 18.7% of patients had mixed histology. Overall, the ABO blood group distribution of the 252 patients with MM was comparable with the general population. The median overall survival (OS) was 14 months (95% confidence interval, 11.3-16.6 months). The median OS for A, B, AB, and O were 11, 15, 16, and 15 months respectively (p=0.396). First line chemotherapy was administered to 118 patients. The median OS of patients on pemetrexed or gemcitabine was longer than patient who was not administered chemotherapy [17 months (95%CI, 11.7-22.2) vs. 9 months (95%CI, 6.9-11.0); p<0.001]. Conclusions: The results of this study suggest that patients with MM can benefit from treatment with pemetrexed or gemcitabine in combination with cisplatin. We did not observe a statistically significant association between ABO blood group and risk of MM.

Lack of Any Relationship between ABO and Rh Blood Groups and Clinicopathological Features in Patients with Gastrointestinal Stromal Tumors: Turkish Oncology Group

Urun, Yuksel,Utkan, Gungor,Yalcin, Suayib,CosKun, Hasan Senol,Kocer, Murat,Ozdemir, Nuriye Yildirim,Kaplan, Mehmet Ali,Arslan, Ulku Yalcintas,Ozdemir, Feyyaz,Oztuna, Derya,Akbulut, Hakan,Icli, Fikri Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.8

Background: An association between the ABO blood group and the risk of certain malignancies, including pancreatic and gastric cancer, has been reported previously. However, it is unclear whether this association is valid for gastrointestinal stromal tumors (GIST). In this study, ABO blood groups and the Rh factor were investigated in a series of GIST cases. Material and Methods: In 162 patients with GIST, blood group and Rh factor were examined and compared with a control group of 3,022,883 healthy volunteer blood donors of the Turkish Red Crescent between 2004 and 2011. The relationship of blood groups with tumor size, mitotic activity, and age were also evaluated. Results: Overall, the ABO blood group and Rh factor distributions of the 162 patients with GIST were similar to those of the general population. There were no significant differences between both ABO blood types and Rh factor in terms of tumor size, mitotic activity, and age. Conclusion: This is the first study reported on this issue. In our study, we didn't find any relationship between GIST and ABO blood group and Rh factor. However further studies with larger number of patients are needed to establish the role of blood groups in this population.

Isoflavone Composition, Total Polyphenolic Content, and Antioxidant Activity in Soybeans of Different Origin

Vesna Tepavčević,Milica Atanackovic,Jegor Miladinovic,Djordje Malencˇic,Jovan Popovic,Jelena Cvejic 한국식품영양과학회 2010 Journal of medicinal food Vol.13 No.3

Twenty soybean cultivars, originating from the United States, Russia, Serbia, and China, were analyzed for their isoflavone composition, total polyphenolic content, and antioxidant activity. Isoflavones were extracted by aqueous methanol (80%) and analyzed by high-performance liquid chromatography/diode array detection. Precision and linearity of the applied method were within the standard limits of validation. The highest and the lowest total isoflavone contents were 4.59 and 1.45mg/g of dried soybean weight, respectively. A significant difference (P<.05) was found in isoflavone concentration among the different cultivars, but it was observed that origin is not a significant factor that could influence isoflavone content in soybeans. Total polyphenolic content varied between 2.13 and 3.45mg of gallic acid equivalents/g of dried soybean weight. The free radical scavenging activity of soybean extracts assayed by 2,2-diphenyl-1-picrylhydrazyl in terms of 50% inhibitory concentration (IC50) ranged from 1.40 to 3.35mg/mL. Negative correlation between total polyphenolic content and IC50 was observed, but there was no correlation between total isoflavone content and IC50. On the basis of this study, soybean cultivars with larger potency for biological activity could be recognized.

구순 구개열 환자의 성장후 측모형태에 관한 두부계측방사선학적 연구

장익준,손우일,송재철,진병로 영남대학교 기초/임상의학연구소 2001 Yeungnam University Journal of Medicine Vol.18 No.1

Background: Cleft lip and palate deformity have unknown patterns of maxillofacial growth and development. The maxillofacial growth can be affected either by congenital or environmental factors such as infection and trauma. Surgical repair of cleft lip and palate may interfere the subsequent growth and development of maxillofacial region. The purpose of this study is to evaluate the characteristics of maxillofacial growth patterns in adult cleft lip and palate patients. Materials and Methods: The material for this study consisted of 17 adult male patients with cleft lip and palate. Cephalometric tracing and measurements were done by one investigator. The relationship between 17 cleft lip and palate patients and Korean norms were evaluated statistically Results: There were statistically differences in Na. perpendicular to point A, SNA angle, effective maxillary length, maxillofacial differencial, Wit's appraisal and upper incisor to point A(p<0.01). Pogonion to Na. perpendicular also statistically differed(p<0.05). Other measurements didn't statistically differ. Conclusion: It was evident that in adult cleft lip and palate patients, maxilla was retruded and short. Careful cleft lip and palate repair and treatment are recommended for facilitating normal growth of maxilla.

가토의 재생된 점막의 Glycoconjugate 분포의 양상

김익태,김태철,김영민,박영민,임현준,안혜경 한림대학교의료원 1994 人間科學 Vol.18 No.5

황해난류수와 황해저층냉수

김태희,방익찬 제주대학교 1991 논문집 Vol.32 No.-

첫째, 황해의 수온과 염분분포에는 겨울철에 큰 확산의 효과가 나타나는 반면 여름철에는 확산의 효과를 거의 볼 수 없다. 그 이유는 겨울에는 황해난류수가 북상하는 반면 여름에는 황해저층냉수가 남하하기 때문이다. 결국, 황해에는 확산의 효과가 크기는 하나 황해의 특성분포에 근본적인 영향을 주는 것은 해수의 흐름이기 때문에, 황해의 특성분포로 부터 겨울철 황해난류수의 북상과 여름철 황해저층냉수의 남하를 확인할 수 있다. 둘째, 황해난류수의 북상과 황해저층냉수의 남하는 연관을 가진다. 겨울철에는 황해난류수의 북상이 강하면 여름철에 황해저층냉수의 남하세력이 약화되고 반대로 겨울철에 황해난류수의 북상이 약하면 여름철에 황해저층냉수가 겨울철에 형성된다. 이것은 황해저층냉수가 겨울철에 형성된다는 견해를 뒷받침해 주며 황해의 열 공급이 황해난류수에 의해 결정된다는 것을 아울러 보여준다. In winter, warmer temperatures are extended up to the middle of the Yellow Sea while higher salinities stay only in the southern Yellow Sea. At a first glance, it looks like the effects of diffusions. in the absence of the northward Yellow Sea Warm Current. However. in order to explain the weak diffusions in summer, the advections are necessary : the northward Yellow Sea Warm Current in winter and the southward Yellow Sea Bottom Cold Water in summer. The two flows are related. When the Yellow Sea Warm Curent is strong in winter, the Yellow Sea Bottom Cold Water becoms weak in the follwing summer, and vice versa. This supports the opinion that the Yellow Sea Bottom Cold Water are formed in the preceding winter. It also suggests that the heats in the Yellow Sea are supplied mainly by the Yellow Sea Warm Current.