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.

Left ventricular dysfunction in relation with systemic inflammation in chronic obstructive pulmonary disease patients

Sule Tas Gulen,Ufuk Eryilmaz,Mustafa Yilmaz,Fisun Karadag 대한내과학회 2019 The Korean Journal of Internal Medicine Vol.34 No.3

Background/Aims: Most important cause of mortality in chronic obstructive pulmonary disease (COPD) patients is known to be cardiovascular disease (CVD). The objective of the present study was to evaluate the echocardiographic parameters in COPD patients with or without pre-diagnosed CVD and to investigate the relationship between echocardiographic parameters and systemic inflammation markers. Methods: A total of 60 stable COPD patients (23 patients with CVD, group 1; 37 patients without CVD, group 2) and 21 healthy controls (group 3) were included in the study. Six-minute walking test (6MWT), COPD assessment test (CAT), and Body mass index, airflow Obstruction, Dyspnea, and Exercise (BODE) index results were recorded. High-sensitivity C-reactive protein (HsCRP), interleukin 8 (IL-8), fetuin-A, Clara cell protein (CCL-16), N-terminal pro-brain natriuretic peptide levels were studied in serum. Parameters of left and right ventricular systolic and diastolic function were measured by echocardiography. Results: Patients with COPD had higher levels of systemic inflammation markers and lower level of inflammation inhibitor fetuin-A. When three groups were compared, group 1 had lower 6MWT result. HsCRP was highest in group 2 while other inflammatory markers were similar in groups 1 and 2. Regarding echocardiographic parameters, left ventricular ejection fraction (LVEF) was lower and left ventricle end-diastolic diameter (LVED), left ventricle end-systolic diameter (LVES) diameters were higher in group 1. The aortic diameter was higher in COPD patients. Fetuin-A was correlated with diameter of aorta and LVES. LVEF, LVED, and LVES were found to be correlated with functional parameters of COPD cases. Conclusions: In COPD, left ventricular functions are affected as well as right ventricle before prominent clinical findings of cardiac disease and these echocardiographic parameters correlate with functional parameters of COPD patients.

Letters to the Editor : Importance of Rectal Urgency in Childhood Irritable Bowel Syndrome

( Sule Yıldırım ) 대한소화기기능성질환·운동학회(구 대한소화관운동학회) 2014 Journal of Neurogastroenterology and Motility (JNM Vol.20 No.2

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.

Mineral Elements Bio-Accessibility and Antioxidant Indices of Blanched Basella rubra at Different Phases of in vitro Gastrointestinal Digestion

Sule Ola Salawu,Bukola Eugenia Olukemi,Ikuosho Charity Asikhia,Akintunde Afolabi Akindahunsi 한국식품영양과학회 2018 Preventive Nutrition and Food Science Vol.23 No.1

The present investigation was designed to evaluate the mineral element bio-accessibility and antioxidant indices of blanched Basella rubra at different phases of simulated in vitro digestion (oral, gastric, and intestinal). The phenolic composition of processed vegetable was determined using high-performance liquid chromatography (HPLC)-diode-array detection method. Mineral composition, total phenolic content (TPC), total flavonoid content (TFC), ferric reducing antioxidant power (FRAP), and total antioxidant activity (TAA) of the in vitro digested blanched and raw vegetable were also determined. HPLC analysis revealed the presence of some phenolic compounds, with higher levels (mg/g) of polyphenols in raw B. rubra (catechin, 1.12; p-coumaric acid, 6.17; caffeic acid, 2.05) compared with the blanched counterpart, with exeption of chlorogenic acid (2.84), that was higher in blanched vegetable. The mineral content (mg/100 g) showed a higher value in enzyme treated raw vegetable compared to their blanched counterparts, with few exceptions. The results revealed a higher level of some of the evaluated minerals at the intestinal phase of digestion (Zn, 6.36/5.31; Mg, 5.29/8.97; Ca, 2,307.69/1,565.38; Na, 5,128/4,128.21) for raw and blanched respectively, with the exception of Fe, K, and P. The results of the antioxidant indices of in vitro digested B. rubra revealed a higher value at the intestinal phase of in vitro digestion, with raw vegetal matter ranking higher (TPC, 553.56 mg/g; TFC, 518.88 mg/g; FRAP, 8.15 mg/g; TAA, 5,043.16 μM Trolox equivalent/g) than the blanched counterpart. The studied vegetable contains important minerals and antioxidant molecules that would be readily available after passing through the gastrointestinal tract and could be harnessed as functional foods.

Antioxidant and Anticholinesterase Potential of Two Nigerian Bitter Yams Using a Simulated Gastrointestinal Digestion Model and Conventional Extraction

Sule Ola Salawu,Praise Blessing Ajiboye,Akintunde Afolabi Akindahunsi,Aline Augusti Boligon 한국식품영양과학회 2017 Preventive Nutrition and Food Science Vol.22 No.2

The purpose of this study was to evaluate the antioxidant and anticholinesterase activities of yellow and white bitter yams from South Western Nigeria using methanolic extraction and simulated gastrointestinal digestion models. The phenolic compounds in the bitter yam varieties were evaluated by high performance liquid chromatography with a diode array detector (HPLC-DAD). The total phenolic content of the bitter yams was measured by the Folin-Ciocalteu method, reductive potential by assessing the ability of the bitter yam to reduce FeCl₃ solution, and the antioxidant activities were determined by the 2,2-diphenyl-1-picrylhydrazyl radical (DPPH·) scavenging activity, 2,2’-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) radical cation (ABTS<SUP>·+</SUP>) scavenging activity, nitric oxide radical (NO<SUP>·</SUP>) scavenging ability, hydroxyl radical scavenging ability, and ability to inhibit Fe<SUP>2+</SUP>-induced lipid oxidation. The HPLC-DAD analysis revealed the presence of some phenolic compounds in the studied bitter yam varieties, with varying degree of quantitative changes after cooking. The antioxidant indices (total phenolic content, total flavonoid content, reducing power, DPPH<SUP>·</SUP> scavenging activity, ABTS<SUP>·+</SUP> scavenging activity, and NO<SUP>·</SUP> scavenging activity) were higher in the simulated gastrointestinal digestion model compared to the methanolic extract, with the in vitro digested cooked white bitter yam ranking higher. Similarly, the in vitro digested yams had a higher inhibitory action against lipid oxidation compared to the methanolic extracts, with the cooked white bitter yam ranking high. The methanolic extracts and in vitro enzyme digests showed no acetylcholinesterase inhibitory abilities, while methanolic extracts and the in vitro enzyme digest displayed some level of butyrylcholinesterase inhibitory activities. Therefore the studied bitter yams could be considered as possible health supplements.

Effect of a low oxygen and high carbon dioxide modified atmosphere on the mortality of different life stages of Carpophilus hemipterus

Sule Tütüncü 한국응용곤충학회 2022 Journal of Asia-Pacific Entomology Vol.25 No.2

Carpophilus hemipterus is an important cosmopolitan pest species that causes high economic losses in fruits before and after harvest. In this study, 0–2 d old eggs, 12 d old mature larvae and 1 week old adults of C. hemipterus were exposed to a modified atmosphere with low oxygen and high carbon dioxide content (2.1% O 2 + 90% CO 2 + 7.9% N 2 ) for 48–120 h at 20 ◦ C and 75 ± 5% relative humidity. Time-mortality responses were subjected to probit analysis, and the difference between lethal exposure times (LTs) for the different life stages were compared using a lethal dose ratio test. LT 95 values were recorded as 221.83 h, 82.79 h and 65.31 h for egg, larval and adult stages, respectively. The statistical difference between LT 95 values was significant and egg stage was found to be more tolerant than the other two life stages. In addition, the larvae were found to be more tolerant than adults. According to the results of this study, a long time was needed to control the eggs of C. hemipterus.

Fabrication of thin film nanocrystalline TiO2 solar cells using ruthenium complexes with carboxyl and sulfonyl groups

Sule Erten-Ela,Kasim Ocakoglu 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.2

Two ruthenium complexes with carboxyl and sulfonyl groups have been synthesized, [RuII(L1)2(NCS)2]RuIIbis(4,7-diphenyl-1,10-phenanthroline-disulfonic acid disodium salt)-di(thiocyanate) [K313],[RuII(L1)2(dcbpy)] RuII bis(4,7-diphenyl-1,10-phenanthroline-disulfonic acid disodium salt)(4,40-dicarboxy-2,20-bipyridyl) [K314] as photosensitizers. UV–vis, fluorescence emission, AFM and CVmeasurements are also supplied for ruthenium complexes. Photovoltaic properties of dye sensitizednanocrystalline semiconductor solar cells based on Ruthenium complexes which bear carboxyl andsunfonyl groups have been tested under standard AM 1.5 sunlight. Under the standard global AM 1.5solar conditions, K314 and K313-sensitized solar cells demonstrate short circuit photocurrentdensities of 14.92 mA/cm2 and 11.23 mA/cm2 and overall conversion efficiencies of 5.09% and 4.02%,respectively.

Contribution of RhoA Kinase and Protein Kinase C to Weak Relaxant Effect of Pinacidil on Carbachol-Induced Contractions in Sensitized Guinea-Pig Trachealis

Sule Gok,Ahenk Izanli-Paksoy,Kamil Vural 대한약학회 2009 Archives of Pharmacal Research Vol.32 No.2

The exact mechanisms underlying the weak bronchodilator effect of KATP channel openers on cholinergic stimulations is unknown. The present study was designed to examine the relaxant efect of pinacidil in guinea-pig trachea stimulated with carbachol by the presence of calcium sensitizer inhibitors; HA 1077, a rhoA kinase inhibitor, and chelerythrine, a protein kinase C inhibitor. Adenosine (10 μM) was used as other contractile agent for comparison. Tracheal tissues were isolated from ovalbumin sensitized guineapigs and changes in tension were recorded isometrically. Pinacidil (1-100 μM, cumulatively) and HA 1077 (0.01-30 μM, cumulatively) produced concentration-dependent relaxations in unstimulated tisues. The relaxant response to pinacidil decreased in carbachol contracted tissues, but increased in adenosinestimulated tissues. Pretreatment of the tissues with HA 1077 (0.1 μM) and chelerythrine (10 μM) increased the pinacidil-induced relaxations by ~%100 and %40, respectively. Glibenclamide, a KATP channel blocker, partially antagonized the pinacidil response in contracted tissues. Glibenclamide also inhibited the carbachol and adenosine induced contractions. These results suggest that diminish effect of pinacidil may have related to the enhanced calcium sensitization by cholinergic stimulation. Rho kinase inhibitors appear more effective than PKC inhibitors to achieve of this failure.

How Do Women Receive Inheritance? The Processes of Turkish Women’s Inclusion and Exclusion from Property

Sule Toktas,Mary Lou O’Neil 숙명여자대학교 아시아여성연구원 2013 Asian Women Vol.29 No.4

This article employs Turkey as a case study to explore the relationship between property ownership, inheritance, and women’s empowerment. In Turkey, as in much of the world, men dominate ownership of property. This is despite the fact that women have had equal rights to own and inherit property since 1926. With the establishment of the Republic in 1923 came a series of reforms, one of which replaced Islamic Sharia law with a secular civil law that was based on the Swiss Civil Code. The new law, among other things, guaranteed equal rights of property and inheritance regardless of gender. In an attempt to understand the tangled relationship between property and women’s empowerment, we conducted interviews regarding inheritance practices among ideologically secular, wealthy women in Istanbul. For these women and their families, the logic of wealth distribution is deeply informed by a commitment to equality between children with little regard for gender. Even in those cases where strict equality in terms of sameness was not employed, the goal was for an overall balance and fairness between recipients. Despite the fact that inheritance law provides for equality, most of the families employed intervivos transfer, gifts among the living, to distribute their family wealth. Perhaps most interesting, and in contrast to the literature, is the fact that these women do not express any sense of empowerment derived from their status as property owners. Rather education and career proved more important.