26
|
Ozyilmaz E, Sayin S. Utilization of Catalytic Properties of the Encapsulated Lipase with Calix[4]arene-Adorned Sporopollenin. Polycycl Aromat Compd 2016. [DOI: 10.1080/10406638.2016.1200638] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
27
|
Sayin S, Yildiz HB, Eymur S. Synthesis of Various Calix[4]arene Derivatives with Mercaptoalkyl Chains and Their Application in Removing Cr(VI) from Aqueous Solution. Polycycl Aromat Compd 2016. [DOI: 10.1080/10406638.2016.1169193] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
28
|
Yuva-Aydemir Y, Xu XL, Aydemir O, Gascon E, Sayin S, Zhou W, Hong Y, Gao FB. Downregulation of the Host Gene jigr1 by miR-92 Is Essential for Neuroblast Self-Renewal in Drosophila. PLoS Genet 2015; 11:e1005264. [PMID: 26000445 PMCID: PMC4441384 DOI: 10.1371/journal.pgen.1005264] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Accepted: 05/05/2015] [Indexed: 11/18/2022] Open
Abstract
Intragenic microRNAs (miRNAs), located mostly in the introns of protein-coding genes, are often co-expressed with their host mRNAs. However, their functional interaction in development is largely unknown. Here we show that in Drosophila, miR-92a and miR-92b are embedded in the intron and 3'UTR of jigr1, respectively, and co-expressed with some jigr1 isoforms. miR-92a and miR-92b are highly expressed in neuroblasts of larval brain where Jigr1 expression is low. Genetic deletion of both miR-92a and miR-92b demonstrates an essential cell-autonomous role for these miRNAs in maintaining neuroblast self-renewal through inhibiting premature differentiation. We also show that miR-92a and miR-92b directly target jigr1 in vivo and that some phenotypes due to the absence of these miRNAs are partially rescued by reducing the level of jigr1. These results reveal a novel function of the miR-92 family in Drosophila neuroblasts and provide another example that local negative feedback regulation of host genes by intragenic miRNAs is essential for animal development.
Collapse
|
29
|
Sayin S, Azak H, Yildiz HB, Camurlu P, Akkus GU, Toppare L, Ersoz M. Calixarene assembly with enhanced photocurrents using P(SNS-NH2)/CdS nanoparticle structure modified Au electrode systems. Phys Chem Chem Phys 2015; 17:19911-8. [DOI: 10.1039/c5cp01932j] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two novel calix[n]arene-adorned gold electrodes producing high photocurrent intensities were successfully constructed.
Collapse
|
30
|
Gokoglan TC, Soylemez S, Kesik M, Unay H, Sayin S, Yildiz HB, Cirpan A, Toppare L. A novel architecture based on a conducting polymer and calixarene derivative: its synthesis and biosensor construction. RSC Adv 2015. [DOI: 10.1039/c5ra03933a] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
An amperometric biosensor based on a selenium comprising conducting polymer and newly synthesized calixarene derivative with gold nanoparticles was constructed for the detection of glucose.
Collapse
|
31
|
Sayin S, Ozbek C, Okur S, Yilmaz M. Preparation of the ferrocene-substituted 1,3-distal p-tert-butylcalix[4]arene based QCM sensors array and utilization of its gas-sensing affinities. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2014.06.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
32
|
Akoz E, Sayin S, Kaplan S, Yilmaz M. Improvement of catalytic activity of lipase in the presence of calix[4]arene valeric acid or hydrazine derivative. Bioprocess Biosyst Eng 2014; 38:595-604. [DOI: 10.1007/s00449-014-1299-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Accepted: 09/30/2014] [Indexed: 11/30/2022]
|
33
|
Sayin S, Yilmaz M. Brønsted acidic magnetic nano-Fe3O4-adorned calix[n]arene sulfonic acids: synthesis and application in the nucleophilic substitution of alcohols. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.06.034] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
34
|
Yildiz HB, Kamaci M, Karaman M, Toppare L, Sayin S. Photoelectrochemical Biosensing Approach for Alcohol Determination by “Wiring” of Alcohol Oxidase Photonically with P(SNS-NH2)/AOx/CNT/[Ru(bpy)3]2+Modified Electrodes. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2014. [DOI: 10.1080/10601325.2014.893127] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
|
35
|
Sayin S, Eymur S, Yilmaz M. Anion Extraction Properties of a New “Proton-Switchable” Terpyridin-Conjugated Calix[4]arene. Ind Eng Chem Res 2014. [DOI: 10.1021/ie4020233] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
36
|
Sonmez B, Sayin S, Yalcinkaya EE, Seleci DA, Yildiz HB, Demirkol DO, Timur S. Calixarene modified montmorillonite: a novel design for biosensing applications. RSC Adv 2014. [DOI: 10.1039/c4ra11818a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Here we report the synthesis, characterization and application of calixarene (Calix) modified montmorillonite (Mt) as a platform for bio-applications such as biomolecule immobilization and biosensing technologies.
Collapse
|
37
|
Sayin S, Yilmaz M. The synthesis of new calix[n]arene quaternary ammonium salts and investigation of their catalytic affinities for three component Mannich-type reactions in water. RSC Adv 2014. [DOI: 10.1039/c3ra43881c] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
38
|
Sayin S, Akoz E, Yilmaz M. Enhanced catalysis and enantioselective resolution of racemic naproxen methyl ester by lipase encapsulated within iron oxide nanoparticles coated with calix[8]arene valeric acid complexes. Org Biomol Chem 2014; 12:6634-42. [DOI: 10.1039/c4ob01048e] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this study, two types of nanoparticles have been used as additives for the encapsulation of Candida rugosa lipase via the sol–gel method.
Collapse
|
39
|
Ozyilmaz E, Sayin S, Arslan M, Yilmaz M. Improving catalytic hydrolysis reaction efficiency of sol–gel-encapsulated Candida rugosa lipase with magnetic β-cyclodextrin nanoparticles. Colloids Surf B Biointerfaces 2014; 113:182-9. [DOI: 10.1016/j.colsurfb.2013.08.019] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2013] [Revised: 08/07/2013] [Accepted: 08/13/2013] [Indexed: 10/26/2022]
|
40
|
Arslan M, Sayin S, Yilmaz M. Enantioselective sorption of some chiral carboxylic acids by various cyclodextrin-grafted iron oxide magnetic nanoparticles. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.tetasy.2013.07.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
41
|
Ozyilmaz E, Sayin S. Preparation of New Calix[4]arene-Immobilized Biopolymers for Enhancing Catalytic Properties of Candida rugosa Lipase by Sol–Gel Encapsulation. Appl Biochem Biotechnol 2013; 170:1871-84. [DOI: 10.1007/s12010-013-0308-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Accepted: 05/22/2013] [Indexed: 11/30/2022]
|
42
|
Sayin S, Ozcan F, Yilmaz M. Two novel calixarene functionalized iron oxide magnetite nanoparticles as a platform for magnetic separation in the liquid–liquid/solid–liquid extraction of oxyanions. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:2433-9. [DOI: 10.1016/j.msec.2013.02.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2011] [Revised: 01/17/2013] [Accepted: 02/04/2013] [Indexed: 10/27/2022]
|
43
|
Ozyilmaz E, Sayin S. A magnetically separable biocatalyst for resolution of racemic naproxen methyl ester. Bioprocess Biosyst Eng 2013; 36:1803-6. [DOI: 10.1007/s00449-013-0941-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2013] [Accepted: 03/04/2013] [Indexed: 11/25/2022]
|
44
|
Yildiz HB, Demirkol DO, Sayin S, Yilmaz M, Koysuren O, Kamaci M. New Amperometric Cholesterol Biosensors Using Poly(ethyleneoxide) Conducting Polymers. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2013. [DOI: 10.1080/10601325.2013.821921] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
45
|
Kurt M, Karabacak M, Okur S, Sayin S, Yilmaz M, Sundaraganesan N. Synthesis, FT-IR, FT-Raman, dispersive Raman and NMR spectroscopic study of a host molecule which potential applications in sensor devices. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 94:126-133. [PMID: 22522295 DOI: 10.1016/j.saa.2012.03.070] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Revised: 03/18/2012] [Accepted: 03/21/2012] [Indexed: 05/31/2023]
Abstract
The solid phase FT-IR, FT-Raman and dispersive Raman spectra of the host molecule which potential applications in sensor devices have been recorded in the region 400-4000 and 50-3500cm(-1), respectively. The spectra were interpreted in terms of fundamentals modes, combination and overtone bands. The structure of the molecule was optimized and the structural characteristics were determined by density functional theory (DFT) using B3LYP method with 6-31G(d) basis set. The vibrational frequencies were calculated for the studied molecule by DFT method, and compared with the experimental frequencies, which yield good agreement between observed and calculated frequencies. Finally the calculation results were applied to simulate infrared and Raman spectra of the compound. Obtained these spectra also showed good agreement with observed spectra. The dipole moment, linear polarizability and first hyperpolarizability values were also computed. The linear polarizability and first hyperpolarizability of the studied molecule indicate that the compound is a good candidate of nonlinear optical materials.
Collapse
|
46
|
Sayin S, Gubbuk IH, Yilmaz M. Preparation of calix[4]arene-based sporopollenin and examination of its dichromate sorption ability. J INCL PHENOM MACRO 2012. [DOI: 10.1007/s10847-012-0152-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
47
|
Samdanci ET, Firat C, Cakir E, Ak M, Sayin S, Nurkabul Z. The incidence of non-proliferative and precancerous lesions of reduction mammoplasty: evaluation of 273 cases. EUROPEAN REVIEW FOR MEDICAL AND PHARMACOLOGICAL SCIENCES 2011; 15:1207-1211. [PMID: 22165684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
BACKGROUND Reduction mammoplasty (RM) is one of the most commonly performed plastic surgery procedures to treat symptomatic macromasty or to correct asymmetry. Occult breast carcinomas were rarely defined in RM specimens. There are few studies aiming to define the incidence of non-proliferative and precancerous lesions. MATERIAL AND METHODS We evaluated the pathological findings of the RM specimens that have been submitted to our Center for the last 6 years (2005-2011). RESULTS A total of 273 cases with bilateral RM were enrolled to the study. Of them, 229 cases had pathological changes. Eight cases (2.9%) had atypical ductal/lobular hyperplasia. One case (0.3%) had lobular carcinoma in situ; however, no invasive breast carcinoma was detected. Other pathological findings included fibrocystic changes, fibrosis, adenosis, fibroadenoma (without complex features), mastitis and duct ectasia. CONCLUSIONS Pathological examination of the RM specimens is quite important to define the lesions precancerous of breast carcinoma. Unknown occult breast lesions could be identified and early interventions may be taken into account.
Collapse
|
48
|
Sayin S, Yilmaz M, Tavasli M. Syntheses of two diamine substituted 1,3-distal calix[4]arene-based magnetite nanoparticles for extraction of dichromate, arsenate and uranyl ions. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.03.012] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
49
|
Sayin S, Ozcan F, Yilmaz M. Preparation and Application of Calix[4]arene Derivatives Bearing Pyridinium Units-Grafted Magnetite Nanoparticles for Removal of Dichromate and Arsenate Anions. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2011. [DOI: 10.1080/10601325.2011.562466] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
50
|
Sayin S, Uysal Akkuş G, Cibulka R, Stibor I, Yilmaz M. Synthesis of Flavin-Calix[4]arene Conjugate Derivatives. Helv Chim Acta 2011. [DOI: 10.1002/hlca.201000260] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|