Zeynep Delen | Sabancı University (original) (raw)
Work on stable radicals by Zeynep Delen
Unpublished, 2014
A short study abroad program in Turkey provided U.S. university students with an excellent opport... more A short study abroad program in Turkey provided U.S. university students with an excellent opportunity for a first encounter with a Muslim majority society. Using the Dynamic Intercultural Competence Framework and Intergroup Contact Theory as our foundation, we embedded five Turkish university students within the five research groups composed of five U.S. students. We conducted a qualitative review of U.S. students’ perceptions before and after the study abroad with Bennett’s Developmental Model of Intercultural Sensitivity as our lens. Findings suggest that engagement of university students from major Turkish universities as equal research partners, translators and cultural ambassadors became a catalyst for enhancing intercultural connections between U.S.-based university students and cultural environments within the study abroad experience. U.S. students’ cultural views shifted on Bennett’s scale from ethnocentric to ethnorelative.
Journal of The American Chemical Society, 2008
The title radical (F4BImNN) is a stable nitronylnitroxide that forms hydrogen-bonded NH... ON cha... more The title radical (F4BImNN) is a stable nitronylnitroxide that forms hydrogen-bonded NH... ON chains in the solid state. The chains assemble the F4BImNN molecules to form stacked contacts between the radical groups, in a geometry that is expected to exhibit ferromagnetic (FM) exchange based on spin polarization (SP) models. The experimental magnetic susceptibility of F4BImNN confirms the expectation, showing 1-D Heisenberg chain FM exchange behavior over 1.8-300 K with an intrachain exchange constant of Jchain/k = +22 K. At lower temperatures, ac magnetic susceptibility and variable field heat capacity measurements show that F4BImNN acts as a quasi-1-D ferromagnet. The dominant ferromagnetic exchange interaction is attributable to overlap between spin orbitals of molecules within the hydrogen-bonded chains, consistent with the SP model expectations. The chains appear to be antiferromagnetically exchange coupled, giving cusps in the ac susceptibility and zero field heat capacity at lower temperatures. The results indicate that the sample orders magnetically at about 0.7 K. The magnetic heat capacity ordering cusp shifts to lower temperatures as external magnetic field increases, consistent with forming a bulk antiferromagnetic phase below a Néel temperature of TN(0) = 0.72 K, with a critical field of Hc approximately 1800 Oe. The interchain exchange is estimated to be zJ/k congruent with (-)0.1 K.
In the last decade, our understanding of the chemistry of olive oil has dramatically improved. He... more In the last decade, our understanding of the chemistry of olive oil has dramatically improved. Here, the essential chemistry of olive oil and its important minor constituents is described and related to the typical sensory categories used to rate and experience oils: color, aroma, bitterness, and pungency. We also describe experiments to explore some of the characteristics of olive oil related to its status as a new health food. Simple qualitative experiments on olive oil can be done in conjunction with tastings of the oil. First, we establish the relationship between the color of an object and the absorption of light by its molecular constituents using gummy candies and laser pointers. Then, the colour of the various oils can be measured quantitatively using an iPhone app (Irodori). Illuminating the oil with a green laser produces a startling red fluorescence in the presence of the natural chlorophyll in some olive oils. Relatively straightforward colorimetric assays
can reveal the presence of unsaturated fatty acids, healthy antioxidants such as phenols (unique to olive oils), contaminating peroxides, and the level of free fatty acid that is a telltale sign of poorly treated or stale oils. A final comparison of the sensory observations from tasting with the chemical and spectroscopic analysis provides an introduction to the science behind food standards and the sensitivity of our own sensory apparatus.
Advanced Functional Materials, 2007
The photoluminescence (PL) and electroluminescence (EL) of four 2,7-bis(phenylethenyl)fluorenes (... more The photoluminescence (PL) and electroluminescence (EL) of four 2,7-bis(phenylethenyl)fluorenes (OFPVs) and two 2,7-diphenylfluorenes (OFPhs) are compared to evaluate effects of nonconjugating peripheral substitution and conjugation length on their EL emissions. The OFPVs exhibit very similar PL spectra with 460–480 nm emission maxima but show large variation in the organic light-emitting diode (OLED) efficacy: from a material that does not give persistent emission in test OLEDs (9,9-diheptyl substitution on the fluorene ring) to materials with luminance efficiencies of 0.5 cd A–1 and greater (9,9-diethyl substitution on the fluorene ring, methoxy and methoxy/heptyloxy substituents on the phenylethenyl rings). The best OFPV in an ITO/PEDOT:PSS/(emitter)/Ca–Al (ITO: indium tin oxide; PEDOT: poly(ethylenedioxythiophene); PSS: poly(styrene sulfonate)) OLED configuration has 9,9-diethyl substitution and terminal heptyloxy substitution (maximum luminance of 1500 cd m–2 at 12 V). Unlike the OFPVs, the neat OFPhs show not only EL at the desired blue output of ca. 400–410 nm emission maxima but also an undesired green emission component at 500–550 nm. Blending the OFPhs with poly(methyl methacrylate) eliminates the long-wavelength component when the emitter load is 10–25 %, but the OFPh luminance efficiencies, turn-on voltages, and maximum luminance tend to be poorer than those of the OFPVs. The deficiencies of the OFPhs appear to be attributable to thermal degradation and oxidative reactivity, although solid-state annealing and a nonoptimal bandgap match to the OLED device configuration may also contribute.
Chemistry of Materials, 2006
The magnetism of purely organic open-shell molecules has been much-pursued 1 since the discovery ... more The magnetism of purely organic open-shell molecules has been much-pursued 1 since the discovery that one phase of 2-(p-nitrophenyl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazole-3-oxide-1-oxyl (pNO2PhNN) is ferromagnetic 2 (FM) at very low temperature. Attempts to increase the magnetic transition temperatures of such molecules require creation or strengthening of reproducible crystal packing motifs that yield extended (beyond dimeric) dimensionalities of exchange interactions. Several radicals show quasi-onedimensional chain exchange of ∼10 K (84 J/mol) or larger. 3 2-(Benzimidazol-2-yl)-4,4,5,5-tetramethyl-4,5-dihydro-1Himidazole-3-oxide-1-oxyl (BImNN) is a particularly interesting example, forming 3a-c hydrogen-bonded one-dimensional chains with significant FM exchange. But, this magnetostructural motif can change significantly with even small molecular changes. 4 Because 4,5,6,7-tetrafluorobenzimida-zole (F4BIm) exhibits very different crystallography from nonfluorinated benzimidazoles, 5 we synthesized 2-(4,5,6,7tetrafluorobenzimidazol-2-yl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazole-3-oxide-1-oxyl (F4BImNN) to investigate effects of extensive aryl fluorination on the magnetism of the BImNN variants.
![Research paper thumbnail of Crystallography and magnetism of 1-(4-[ N- tert-butylaminoxyl]-2,3,5,6-tetrafluorophenyl)pyrrole](https://attachments.academia-assets.com/47983323/thumbnails/1.jpg)
](Polyhedron, 2007
1-(4-[N-tert-Butylaminoxyl]-2,3,5,6-tetrafluorophenyl)pyrrole (BNPPF4) was synthesized and charac... more 1-(4-[N-tert-Butylaminoxyl]-2,3,5,6-tetrafluorophenyl)pyrrole (BNPPF4) was synthesized and characterized by X-ray crystallography, electron spin resonance (ESR), and magnetism. It is unusually stable by comparison to related systems. Its crystallography shows strong twisting of the nitroxide group, and dyad p-stacking that is probably assisted by fluoroarene/pyrrole interactions. There are crystallographic nitroxide chains of >5.5 Å distance between nitroxides, and chains of nitroxide to tert-butyl contacts. BNPPF4 magnetic behavior is consistent with a spin-pairing model having 2J/k = (À)8.7 ± 0.2 K, but not with a simple 1D AFM chain model.
Journal of Organic Chemistry, 2006
Stable radicals 1-(4-(N-tert-butyl-N-aminoxyl)phenyl)pyrrole (BNPP) and 1-(4-(N-[para-methoxyphen... more Stable radicals 1-(4-(N-tert-butyl-N-aminoxyl)phenyl)pyrrole (BNPP) and 1-(4-(N-[para-methoxyphenyl]-N-aminoxyl)phenyl)pyrrole (MNPP) were synthesized and characterized by crystallography and magnetism. BNPP crystals exhibit 1-D chains of intermolecular nitroxide NO to nitroxide CH3 contacts, but polycrystalline magnetic susceptibility measurements show quite small antiferromagnetic (AFM) exchange interactions. MNPP shows stronger AFM exchange interactions that appear to be associated with a 2-D planar mesh of crystallographic nitroxide to nitroxide (N)O...N(O) contacts of 4.0-4.2 A. The AFM behavior of MNPP can be fitted to a 2-D square planar Heisenberg antiferromagnetic exchange model with J/k = (-)0.78 +/- 0.04 K and mean field constant theta = (-)0.77 +/- 0.12 K.
Crystal Growth & Design, 2005
A crystallographic study of several 2,6-di-tert-butylated phenols having 4-azaheterocyclic substi... more A crystallographic study of several 2,6-di-tert-butylated phenols having 4-azaheterocyclic substituents showed phenolic OH···N hydrogen bonding despite the steric hindrance of the tert-butyl groups, with O(H)···N donor-to-acceptor distances less than 3 Å in several cases. The ...
Work on education by Zeynep Delen
unpublished, 2012
We have designed a community based learning workshop in Yeni Foça, a small town in western Turkey... more We have designed a community based learning workshop in Yeni Foça, a small town in western Turkey. Community members join with domestic and international students to investigate the place of olives in the community. Using methods of inquiry from anthropological research, we seek to understand the communities’ history and memories of olive picking. Using
decision analytic methods, we seek to advise communities on how to make better decisions for their future. Finally, using scientific reasoning and experimentation, we work together to explore the chemistry of the olive and how it impacts the quality of the olive oil. In particular, we were interested in understanding the challenges this community faces in producing olives for the world market, in which standards for quality are set which can sometimes sit at odds with local taste. At the same time, we observed a community striving to hold on to local ideals in the face of change.
unpublished, 2014
A short study abroad program in Turkey provided U.S. university students with an excellent opport... more A short study abroad program in Turkey provided U.S. university students with an excellent opportunity for a first encounter with a Muslim majority society. Using the Dynamic Intercultural Competence Framework and Intergroup Contact Theory as our foundation, we embedded five Turkish university students within the five research groups composed of five U.S. students. We conducted a qualitative review of U.S. students’ perceptions before and after the study abroad with Bennett’s Developmental Model of Intercultural Sensitivity as our lens. Findings suggest that engagement of university students from major Turkish universities as equal research partners, translators and cultural ambassadors became a catalyst for enhancing intercultural connections between U.S.-based university students and cultural environments within the study abroad experience. U.S. students’ cultural views shifted on Bennett’s scale from ethnocentric to ethnorelative.
In the last decade, our understanding of the chemistry of olive oil has dramatically improved. He... more In the last decade, our understanding of the chemistry of olive oil has dramatically improved. Here, the essential chemistry of olive oil and its important minor constituents is described and related to the typical sensory categories used to rate and experience oils: color, aroma, bitterness, and pungency. We also describe experiments to explore some of the characteristics of olive oil related to its status as a new health food. Simple qualitative experiments on olive oil can be done in conjunction with tastings of the oil. First, we establish the relationship between the color of an object and the absorption of light by its molecular constituents using gummy candies and laser pointers. Then, the color of the various oils can be measured quantitatively using an iPhone app (Irodori). Illuminating the oil with a green laser produces a startling red fluorescence in the presence of the natural chlorophyll in some olive oils. Relatively straightforward colorimetric assays can reveal the presence of unsaturated fatty acids, healthy antioxidants such as phenols (unique to olive oils), contaminating peroxides, and the level of free fatty acid that is a telltale sign of poorly treated or stale oils. A final comparison of the sensory observations from tasting with the chemical and spectroscopic analysis provides an introduction to the science behind food standards and the sensitivity of our own sensory apparatus.
A short demonstration of Zeytin programs on Sabancı University to start a zeytin network on campu... more A short demonstration of Zeytin programs on Sabancı University to start a zeytin network on campus. Producers, tasting experts, faculty and students met for a full day of activities. More than 30 olive trees were planted on campus as part of the workshop. Children from campus kindergarten joined to plant one of the trees.
This year's Zeytin Program was held in Karaburun upon the opening of the Zeytin Okulu (in 2016). ... more This year's Zeytin Program was held in Karaburun upon the opening of the Zeytin Okulu (in 2016). The infographic shows the key questions and activities that were covered during the course, including chemistry of olive oil; a game on how the market determines the price (industrial engineering) delivered by Prof. Taner Bilgiç of Boğaziçi University.
Extention of the honors course of Virginia Tech university. We drove from Selçuk to Istanbul with... more Extention of the honors course of Virginia Tech university. We drove from Selçuk to Istanbul with 45 students (including 5 Turkish students) and 5 faculty members. This study abroad course covered Nesin Math Village as an alternative learning space, Ephesus, Pergamon and Lesbos with on site active lectures and readings from classics, Ege'de Atölye in Yeni Foça as an alternative liberal arts learning initiative, Gold Mine in Bergama from a geological perspective and a final stay in Istanbul at Feza Gürsey Center with a lecture from Nermin Abadan Unat.
Zeytin Okulu'nun kuruluşuna doğru ilk adımlar
Popular Science Articles in Turkish by Zeynep Delen
Unpublished, 2014
A short study abroad program in Turkey provided U.S. university students with an excellent opport... more A short study abroad program in Turkey provided U.S. university students with an excellent opportunity for a first encounter with a Muslim majority society. Using the Dynamic Intercultural Competence Framework and Intergroup Contact Theory as our foundation, we embedded five Turkish university students within the five research groups composed of five U.S. students. We conducted a qualitative review of U.S. students’ perceptions before and after the study abroad with Bennett’s Developmental Model of Intercultural Sensitivity as our lens. Findings suggest that engagement of university students from major Turkish universities as equal research partners, translators and cultural ambassadors became a catalyst for enhancing intercultural connections between U.S.-based university students and cultural environments within the study abroad experience. U.S. students’ cultural views shifted on Bennett’s scale from ethnocentric to ethnorelative.
Journal of The American Chemical Society, 2008
The title radical (F4BImNN) is a stable nitronylnitroxide that forms hydrogen-bonded NH... ON cha... more The title radical (F4BImNN) is a stable nitronylnitroxide that forms hydrogen-bonded NH... ON chains in the solid state. The chains assemble the F4BImNN molecules to form stacked contacts between the radical groups, in a geometry that is expected to exhibit ferromagnetic (FM) exchange based on spin polarization (SP) models. The experimental magnetic susceptibility of F4BImNN confirms the expectation, showing 1-D Heisenberg chain FM exchange behavior over 1.8-300 K with an intrachain exchange constant of Jchain/k = +22 K. At lower temperatures, ac magnetic susceptibility and variable field heat capacity measurements show that F4BImNN acts as a quasi-1-D ferromagnet. The dominant ferromagnetic exchange interaction is attributable to overlap between spin orbitals of molecules within the hydrogen-bonded chains, consistent with the SP model expectations. The chains appear to be antiferromagnetically exchange coupled, giving cusps in the ac susceptibility and zero field heat capacity at lower temperatures. The results indicate that the sample orders magnetically at about 0.7 K. The magnetic heat capacity ordering cusp shifts to lower temperatures as external magnetic field increases, consistent with forming a bulk antiferromagnetic phase below a Néel temperature of TN(0) = 0.72 K, with a critical field of Hc approximately 1800 Oe. The interchain exchange is estimated to be zJ/k congruent with (-)0.1 K.
In the last decade, our understanding of the chemistry of olive oil has dramatically improved. He... more In the last decade, our understanding of the chemistry of olive oil has dramatically improved. Here, the essential chemistry of olive oil and its important minor constituents is described and related to the typical sensory categories used to rate and experience oils: color, aroma, bitterness, and pungency. We also describe experiments to explore some of the characteristics of olive oil related to its status as a new health food. Simple qualitative experiments on olive oil can be done in conjunction with tastings of the oil. First, we establish the relationship between the color of an object and the absorption of light by its molecular constituents using gummy candies and laser pointers. Then, the colour of the various oils can be measured quantitatively using an iPhone app (Irodori). Illuminating the oil with a green laser produces a startling red fluorescence in the presence of the natural chlorophyll in some olive oils. Relatively straightforward colorimetric assays
can reveal the presence of unsaturated fatty acids, healthy antioxidants such as phenols (unique to olive oils), contaminating peroxides, and the level of free fatty acid that is a telltale sign of poorly treated or stale oils. A final comparison of the sensory observations from tasting with the chemical and spectroscopic analysis provides an introduction to the science behind food standards and the sensitivity of our own sensory apparatus.
Advanced Functional Materials, 2007
The photoluminescence (PL) and electroluminescence (EL) of four 2,7-bis(phenylethenyl)fluorenes (... more The photoluminescence (PL) and electroluminescence (EL) of four 2,7-bis(phenylethenyl)fluorenes (OFPVs) and two 2,7-diphenylfluorenes (OFPhs) are compared to evaluate effects of nonconjugating peripheral substitution and conjugation length on their EL emissions. The OFPVs exhibit very similar PL spectra with 460–480 nm emission maxima but show large variation in the organic light-emitting diode (OLED) efficacy: from a material that does not give persistent emission in test OLEDs (9,9-diheptyl substitution on the fluorene ring) to materials with luminance efficiencies of 0.5 cd A–1 and greater (9,9-diethyl substitution on the fluorene ring, methoxy and methoxy/heptyloxy substituents on the phenylethenyl rings). The best OFPV in an ITO/PEDOT:PSS/(emitter)/Ca–Al (ITO: indium tin oxide; PEDOT: poly(ethylenedioxythiophene); PSS: poly(styrene sulfonate)) OLED configuration has 9,9-diethyl substitution and terminal heptyloxy substitution (maximum luminance of 1500 cd m–2 at 12 V). Unlike the OFPVs, the neat OFPhs show not only EL at the desired blue output of ca. 400–410 nm emission maxima but also an undesired green emission component at 500–550 nm. Blending the OFPhs with poly(methyl methacrylate) eliminates the long-wavelength component when the emitter load is 10–25 %, but the OFPh luminance efficiencies, turn-on voltages, and maximum luminance tend to be poorer than those of the OFPVs. The deficiencies of the OFPhs appear to be attributable to thermal degradation and oxidative reactivity, although solid-state annealing and a nonoptimal bandgap match to the OLED device configuration may also contribute.
Chemistry of Materials, 2006
The magnetism of purely organic open-shell molecules has been much-pursued 1 since the discovery ... more The magnetism of purely organic open-shell molecules has been much-pursued 1 since the discovery that one phase of 2-(p-nitrophenyl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazole-3-oxide-1-oxyl (pNO2PhNN) is ferromagnetic 2 (FM) at very low temperature. Attempts to increase the magnetic transition temperatures of such molecules require creation or strengthening of reproducible crystal packing motifs that yield extended (beyond dimeric) dimensionalities of exchange interactions. Several radicals show quasi-onedimensional chain exchange of ∼10 K (84 J/mol) or larger. 3 2-(Benzimidazol-2-yl)-4,4,5,5-tetramethyl-4,5-dihydro-1Himidazole-3-oxide-1-oxyl (BImNN) is a particularly interesting example, forming 3a-c hydrogen-bonded one-dimensional chains with significant FM exchange. But, this magnetostructural motif can change significantly with even small molecular changes. 4 Because 4,5,6,7-tetrafluorobenzimida-zole (F4BIm) exhibits very different crystallography from nonfluorinated benzimidazoles, 5 we synthesized 2-(4,5,6,7tetrafluorobenzimidazol-2-yl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazole-3-oxide-1-oxyl (F4BImNN) to investigate effects of extensive aryl fluorination on the magnetism of the BImNN variants.
Polyhedron, 2007
1-(4-[N-tert-Butylaminoxyl]-2,3,5,6-tetrafluorophenyl)pyrrole (BNPPF4) was synthesized and charac... more 1-(4-[N-tert-Butylaminoxyl]-2,3,5,6-tetrafluorophenyl)pyrrole (BNPPF4) was synthesized and characterized by X-ray crystallography, electron spin resonance (ESR), and magnetism. It is unusually stable by comparison to related systems. Its crystallography shows strong twisting of the nitroxide group, and dyad p-stacking that is probably assisted by fluoroarene/pyrrole interactions. There are crystallographic nitroxide chains of >5.5 Å distance between nitroxides, and chains of nitroxide to tert-butyl contacts. BNPPF4 magnetic behavior is consistent with a spin-pairing model having 2J/k = (À)8.7 ± 0.2 K, but not with a simple 1D AFM chain model.
Journal of Organic Chemistry, 2006
Stable radicals 1-(4-(N-tert-butyl-N-aminoxyl)phenyl)pyrrole (BNPP) and 1-(4-(N-[para-methoxyphen... more Stable radicals 1-(4-(N-tert-butyl-N-aminoxyl)phenyl)pyrrole (BNPP) and 1-(4-(N-[para-methoxyphenyl]-N-aminoxyl)phenyl)pyrrole (MNPP) were synthesized and characterized by crystallography and magnetism. BNPP crystals exhibit 1-D chains of intermolecular nitroxide NO to nitroxide CH3 contacts, but polycrystalline magnetic susceptibility measurements show quite small antiferromagnetic (AFM) exchange interactions. MNPP shows stronger AFM exchange interactions that appear to be associated with a 2-D planar mesh of crystallographic nitroxide to nitroxide (N)O...N(O) contacts of 4.0-4.2 A. The AFM behavior of MNPP can be fitted to a 2-D square planar Heisenberg antiferromagnetic exchange model with J/k = (-)0.78 +/- 0.04 K and mean field constant theta = (-)0.77 +/- 0.12 K.
Crystal Growth & Design, 2005
A crystallographic study of several 2,6-di-tert-butylated phenols having 4-azaheterocyclic substi... more A crystallographic study of several 2,6-di-tert-butylated phenols having 4-azaheterocyclic substituents showed phenolic OH···N hydrogen bonding despite the steric hindrance of the tert-butyl groups, with O(H)···N donor-to-acceptor distances less than 3 Å in several cases. The ...
unpublished, 2012
We have designed a community based learning workshop in Yeni Foça, a small town in western Turkey... more We have designed a community based learning workshop in Yeni Foça, a small town in western Turkey. Community members join with domestic and international students to investigate the place of olives in the community. Using methods of inquiry from anthropological research, we seek to understand the communities’ history and memories of olive picking. Using
decision analytic methods, we seek to advise communities on how to make better decisions for their future. Finally, using scientific reasoning and experimentation, we work together to explore the chemistry of the olive and how it impacts the quality of the olive oil. In particular, we were interested in understanding the challenges this community faces in producing olives for the world market, in which standards for quality are set which can sometimes sit at odds with local taste. At the same time, we observed a community striving to hold on to local ideals in the face of change.
unpublished, 2014
A short study abroad program in Turkey provided U.S. university students with an excellent opport... more A short study abroad program in Turkey provided U.S. university students with an excellent opportunity for a first encounter with a Muslim majority society. Using the Dynamic Intercultural Competence Framework and Intergroup Contact Theory as our foundation, we embedded five Turkish university students within the five research groups composed of five U.S. students. We conducted a qualitative review of U.S. students’ perceptions before and after the study abroad with Bennett’s Developmental Model of Intercultural Sensitivity as our lens. Findings suggest that engagement of university students from major Turkish universities as equal research partners, translators and cultural ambassadors became a catalyst for enhancing intercultural connections between U.S.-based university students and cultural environments within the study abroad experience. U.S. students’ cultural views shifted on Bennett’s scale from ethnocentric to ethnorelative.
In the last decade, our understanding of the chemistry of olive oil has dramatically improved. He... more In the last decade, our understanding of the chemistry of olive oil has dramatically improved. Here, the essential chemistry of olive oil and its important minor constituents is described and related to the typical sensory categories used to rate and experience oils: color, aroma, bitterness, and pungency. We also describe experiments to explore some of the characteristics of olive oil related to its status as a new health food. Simple qualitative experiments on olive oil can be done in conjunction with tastings of the oil. First, we establish the relationship between the color of an object and the absorption of light by its molecular constituents using gummy candies and laser pointers. Then, the color of the various oils can be measured quantitatively using an iPhone app (Irodori). Illuminating the oil with a green laser produces a startling red fluorescence in the presence of the natural chlorophyll in some olive oils. Relatively straightforward colorimetric assays can reveal the presence of unsaturated fatty acids, healthy antioxidants such as phenols (unique to olive oils), contaminating peroxides, and the level of free fatty acid that is a telltale sign of poorly treated or stale oils. A final comparison of the sensory observations from tasting with the chemical and spectroscopic analysis provides an introduction to the science behind food standards and the sensitivity of our own sensory apparatus.
A short demonstration of Zeytin programs on Sabancı University to start a zeytin network on campu... more A short demonstration of Zeytin programs on Sabancı University to start a zeytin network on campus. Producers, tasting experts, faculty and students met for a full day of activities. More than 30 olive trees were planted on campus as part of the workshop. Children from campus kindergarten joined to plant one of the trees.
This year's Zeytin Program was held in Karaburun upon the opening of the Zeytin Okulu (in 2016). ... more This year's Zeytin Program was held in Karaburun upon the opening of the Zeytin Okulu (in 2016). The infographic shows the key questions and activities that were covered during the course, including chemistry of olive oil; a game on how the market determines the price (industrial engineering) delivered by Prof. Taner Bilgiç of Boğaziçi University.
Extention of the honors course of Virginia Tech university. We drove from Selçuk to Istanbul with... more Extention of the honors course of Virginia Tech university. We drove from Selçuk to Istanbul with 45 students (including 5 Turkish students) and 5 faculty members. This study abroad course covered Nesin Math Village as an alternative learning space, Ephesus, Pergamon and Lesbos with on site active lectures and readings from classics, Ege'de Atölye in Yeni Foça as an alternative liberal arts learning initiative, Gold Mine in Bergama from a geological perspective and a final stay in Istanbul at Feza Gürsey Center with a lecture from Nermin Abadan Unat.
Zeytin Okulu'nun kuruluşuna doğru ilk adımlar
Sarkaç Dergisi, Bilim Akademisi , 2019
En son ne zaman antibiyotik kullandınız? Evinizde bir veya daha fazla kutu antibiyotik var mı? Ço... more En son ne zaman antibiyotik kullandınız? Evinizde bir veya daha fazla kutu antibiyotik var mı? Çocuğunuz hasta olduğunda doktora sormadan antibiyotik verdiğiniz oldu mu? Antibakteriyel sabunları, antibakteriyel çorapları, antibakteriyel araba koltuklarını tercih ediyor musunuz?
Sarkaç Dergisi, Bilim Akademisi, 2018
Bergama’nın en iyi köftecisindeyiz parmaklarımızı yemek üzereyiz. Taptaze ekmeklerimizi bol zeyti... more Bergama’nın en iyi köftecisindeyiz parmaklarımızı yemek üzereyiz. Taptaze ekmeklerimizi bol zeytinyağlı piyaza bandırıyoruz. Her şey harika. Gözüm kapının yanındaki rafta yan yana dizilmiş zeytinyağı şişelerine takılıyor. Dört adet ikişer litrelik pet şişe, sonuncusu yarı dolu, üzerlerine vuran güneşle altın gibi parlıyorlar. Ne kadar zamandır orada durduklarını bilmiyorum ama hasat zamanında olduğumuza ve lokantadaki hızlı sirkülasyona bakılırsa çok uzun süre olmamalı. Ne şanslıyız diye geçiriyorum içimden. Böyle bir tazeliği ve bolluğu çoğu yeni dünyalı hayal bile edemez.
Yemek ve Kültür, Çiya Yayınları, 2018
Temel kimya kavramlarına hakim olmadan üstün kaliteli zeytinyağı üretmek mümkün değildir. Daha ka... more Temel kimya kavramlarına hakim olmadan üstün kaliteli zeytinyağı üretmek mümkün değildir. Daha kaliteli ürün için sadece teknolojiye değil, temel bilime ve bilim eğitimine de yatırım yapılması gerekir. Zeytin sektörünün öncülüğünde özerk ve akredite bilim programlarının hayata geçmesi, bu örneğin diğer sektörlere örnek olması dileğiyle.
Sarkaç Dergisi, Bilim Akademisi, 2017
Zeytinyağının neden sağlıklı olduğunu anlamak için önce zeytinyağının bir meyve suyu olduğunu hat... more Zeytinyağının neden sağlıklı olduğunu anlamak için önce zeytinyağının bir meyve suyu olduğunu hatırlamak lazım. Ne de olsa ağaçtan topladığımız meyveyi sıkarak elde edebildiğimiz tek yağ.
Sarkaç Dergisi, Bilim Akademisi, 2018
Urla’da bulunan MÖ 6. YY’a ait Klazomenai zeytinyağı işliği o dönemdeki bölge teknolojisinin düny... more Urla’da bulunan MÖ 6. YY’a ait Klazomenai zeytinyağı işliği o dönemdeki bölge teknolojisinin dünyanın geri kalanının ne kadar ilerisinde olduğunun çok iyi bir göstergesi. Hala kullanılan bu teknolojiye taşbaskı diyoruz. Taşbaskıda taş değirmenlerle hamur haline getirilen zeytinler kıl çuvallara doldurulur. Üzerlerine baskı uygulanır, sıcak su dökülerek akışkanlık artırılır. Preslenen çuvalların deliklerinden yağ sızar, Sızma Zeytinyağının adı buradan gelir. Ne kadar özen gösterilse de taşbaskıda meyvenin mis gibi kokusunu ve sağlık veren antioksidanlarını kaybetmesi yani yağın kalitesinin düşmesi kaçınılmazdır.
Sarkaç Dergisi, Bilim Akademisi, 2019
Ege ve Akdeniz’de bir köy kahvesine gidip sorsanız çok büyük ihtimalle biri kalkıp sizi yürüme me... more Ege ve Akdeniz’de bir köy kahvesine gidip sorsanız çok büyük ihtimalle biri kalkıp sizi yürüme mesafesinde birkaç bin yaşında olduğu düşünülen bir zeytin ağacına götürecektir. Etrafta bu yaşlı zeytin ağaçlarından o kadar çok var ki çoğumuz onları görmüyoruz bile, çünkü onlar bizler için hava ya da su kadar yaygın ve olağanlar. Halbuki iki üç bin yıllık olduğu düşünülen ve hala meyve veren bu ağaçların medeniyetlerin doğuşuna ve çöküşüne tanıklık etmiş olmaları inanılır gibi değil. Şaka değil, binlerce yıldan bahsediyoruz! Bu ağaçların bazıları fidanken ortada ne Müslümanlık vardı ne Hıristiyanlık ne Osmanlı Devleti ne de Bizans! Yaşın tam olarak nasıl tespit edildiği (veya edilemediği) konusunu sona bırakalım, zeytin ağaçları nasıl oluyor da bu kadar uzun yaşayabiliyorlar, canlılıklarını neye borçlular?
Social Sciences
This paper addresses issues pertaining to the future of work and sustainability through the lens ... more This paper addresses issues pertaining to the future of work and sustainability through the lens of a case study of ecological deterioration and how it destroys and creates green jobs in a forest village of Istanbul. As elsewhere in major urban centres of developing countries, the hyper-expansion of city regions due to authoritarian developmentalism fosters the state-led construction sector in Turkey. Growth-driven economic policies continue to have adverse effects on the environment, resulting in deforestation among an array of ecological damage. Based on a qualitative analysis of oral history interviews and observations informed by a larger interdisciplinary research project, we observe resilience in the forest village under scrutiny as certain types of work are abandoned, and new forms are created by adaptation to the ecological and social conditions. The perceptions of changing conditions by locals vary across existing ethnic, gender, and class hierarchies in the local community...
The 33rd Northeast Regional Meeting, 2005
Phenols are important in biological chemistry due to their antioxidant properties. A set of 2,6-d... more Phenols are important in biological chemistry due to their antioxidant properties. A set of 2,6-di-t-butylated phenols with varying heterocyclic rings at their para positions were synthesized using palladium and copper coupling chemistry. The crystal structures of the phenols ...
The Chemical Story of Olive Oil: From Grove to Table
Despite the growing interest in olive oil, most people know very little about what it is or how i... more Despite the growing interest in olive oil, most people know very little about what it is or how it is made. This book provides a comprehensive treatment of olive oil from the tree to table, from a molecular and personal perspective. Growers often do not know what is happening at a molecular level or why certain practices produce superior or inferior results, for example, why adjusting a temperature rewards them with winning oils. This book aims to provide some of the answers as well as the importance of the chemicals responsible for the flavour and health effects. Readers will also get a deeper understanding of what makes an extra virgin olive oil authentic and how scientists are helping to fight fraud regarding this valuable commodity. Including anecdotes from growers of olives and producers of oils, the authors provide an accessible text for a wide audience from food science students to readers interested in the human story of olive oil production.
Journal of Chemical Education, 2014
The olive provides a culinary landscape in which an appreciation of the unique chemical nature is... more The olive provides a culinary landscape in which an appreciation of the unique chemical nature is a key to real understanding. The chemical structure of the natural biomolecules of the olive can be related to the development of the characteristic color, taste, and smell of the oils, and give rise to the identification of olive oil as a healthy oil.
A series of 2,6-di-tert -butylphenols with para aza-heterocyclic rings and fluorinated was synthe... more A series of 2,6-di-tert -butylphenols with para aza-heterocyclic rings and fluorinated was synthesized. These phenols were oxidized to the corresponding persistent phenoxyl radicals and their EPR spectra (spin density distribution) and kinetic decay rates were studied. ...
![Research paper thumbnail of Crystallography and magnetism of 1-(4-[ N- tert-butylaminoxyl]-2,3,5,6-tetrafluorophenyl)pyrrole](https://attachments.academia-assets.com/68156835/thumbnails/1.jpg)
](Polyhedron, Jun 1, 2007
1-(4-[N-tert-Butylaminoxyl]-2,3,5,6-tetrafluorophenyl)pyrrole (BNPPF4) was synthesized and charac... more 1-(4-[N-tert-Butylaminoxyl]-2,3,5,6-tetrafluorophenyl)pyrrole (BNPPF4) was synthesized and characterized by X-ray crystallography, electron spin resonance (ESR), and magnetism. It is unusually stable by comparison to related systems. Its crystallography shows strong twisting of the nitroxide group, and dyad p-stacking that is probably assisted by fluoroarene/pyrrole interactions. There are crystallographic nitroxide chains of >5.5 Å distance between nitroxides, and chains of nitroxide to tert-butyl contacts. BNPPF4 magnetic behavior is consistent with a spin-pairing model having 2J/k = (À)8.7 ± 0.2 K, but not with a simple 1D AFM chain model.
A series of 2,6-di-tert -butylphenols with para aza-heterocyclic rings and fluorinated was synthe... more A series of 2,6-di-tert -butylphenols with para aza-heterocyclic rings and fluorinated was synthesized. These phenols were oxidized to the corresponding persistent phenoxyl radicals and their EPR spectra (spin density distribution) and kinetic decay rates were studied. ...
Journal of the American Chemical Society, 2016