The Experts below are selected from a list of 8862 Experts worldwide ranked by ideXlab platform
Simone Vincenzi - One of the best experts on this subject based on the ideXlab platform.
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the secondary structure of a major wine protein is modified upon interaction with polyphenols
Molecules, 2020Co-Authors: Mattia Di Gaspero, Paolo Ruzza, Rohanah Hussain, Claudia Honisch, Barbara Biondi, Giuliano Siligardi, Matteo Marangon, Andrea Curioni, Simone VincenziAbstract:Polyphenols are an important constituent of wines and they are largely studied due to their antioxidant properties and for their effects on wine quality and stability, which is also related to their capacity to bind to proteins. The effects of some selected polyphenols, including procyanidins B1 and B2, Tannic Acid, quercetin, and rutin, as well as those of a total white wine procyanidin extract on the conformational properties of the major wine protein VVTL1 (Vitis vinifera Thaumatin-Like-1) were investigated by Synchrotron Radiation Circular Dichroism (SRCD). Results showed that VVTL1 interacts with polyphenols as demonstrated by the changes in the secondary (far-UV) and tertiary (near-UV) structures, which were differently affected by different polyphenols. Additionally, polyphenols modified the two melting temperatures (TM) that were found for VVTL1 (32.2 °C and 53.9 °C for the protein alone). The circular dichroism (CD) spectra in the near-UV region revealed an involvement of the aromatic side-chains of the protein in the interaction with phenolics. The data demonstrate the existence of an interaction between polyphenols and VVTL1, which results in modification of its thermal and UV denaturation pattern. This information can be useful in understanding the behavior of wine proteins in presence of polyphenols, thus giving new insights on the phenomena that are involved in wine stability.
Naebe Minoo - One of the best experts on this subject based on the ideXlab platform.
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Sustainable carbon microtube derived from cotton waste for environmental applications
'Elsevier BV', 2019Co-Authors: Shirvanimoghaddam Kamya, Ćwikła-bundyra Wiesława, Czech Ozena, Wiącek, Agnieszka E., Naebe MinooAbstract:© 2018 Elsevier B.V. Given its natural state and cost-effectiveness, cotton can be an ideal material for the fabrication of high performance catalyst and pollutant removal from the environment. In this study, novel carbon microtube derived from cotton waste were successfully prepared by thermal treatment of cotton in an argon atmosphere and used as a Tannic Acid sorbent. Carbon microtube (CMT) properties were investigated by electron microscopy (SEM, TEM), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), zeta potentiometer and N2 adsorption − desorption. The most stable solutions in water were established using CMT treated at 900 and 1300 °C and in Tannic Acid (TA) at 1100 and 1300 °C, respectively. Maximum TA sorption capacity, 596.5 mg g−1, was found for CMT treated at 1100 °C. The suitability of Langmuir model with simultaneously good fitting of other tested models of sorption implied that monolayer sorption was the first step of TA sorption onto CMT via π–π interactions and hydrogen bonds. Given the repeatability, high removal performance and cost effectiveness of the cotton based carbon microtubes when compared to other well-known sorbent such as carbon nanotubes, the carbon microtubes demonstrated great potential as low-cost and effective Tannic Acid (and dissolved organic matter) adsorbent
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Sustainable carbon microtube derived from cotton waste for environmental applications
'Elsevier BV', 2019Co-Authors: Shirvanimoghaddam Kamya, Czech Ożena, Wiącek Agnieszka, Ćwikła-bundyra Wiesława, Naebe MinooAbstract:Given its natural state and cost-effectiveness, cotton can be an ideal material for the fabrication of high performance catalyst and pollutant removal from the environment. In this study, novel carbon microtube derived from cotton waste were successfully prepared by thermal treatment of cotton in an argon atmosphere and used as a Tannic Acid sorbent. Carbon microtube (CMT) properties were investigated by electron microscopy (SEM, TEM), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), zeta potentiometer and N2 adsorption − desorption. The most stable solutions in water were established using CMT treated at 900 and 1300 °C and in Tannic Acid (TA) at 1100 and 1300 °C, respectively. Maximum TA sorption capacity, 596.5 mg g−1, was found for CMT treated at 1100 °C. The suitability of Langmuir model with simultaneously good fitting of other tested models of sorption implied that monolayer sorption was the first step of TA sorption onto CMT via π–π interactions and hydrogen bonds. Given the repeatability, high removal performance and cost effectiveness of the cotton based carbon microtubes when compared to other well-known sorbent such as carbon nanotubes, the carbon microtubes demonstrated great potential as low-cost and effective Tannic Acid (and dissolved organic matter) adsorbent. © 2018 Elsevier B.V
Mattia Di Gaspero - One of the best experts on this subject based on the ideXlab platform.
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the secondary structure of a major wine protein is modified upon interaction with polyphenols
Molecules, 2020Co-Authors: Mattia Di Gaspero, Paolo Ruzza, Rohanah Hussain, Claudia Honisch, Barbara Biondi, Giuliano Siligardi, Matteo Marangon, Andrea Curioni, Simone VincenziAbstract:Polyphenols are an important constituent of wines and they are largely studied due to their antioxidant properties and for their effects on wine quality and stability, which is also related to their capacity to bind to proteins. The effects of some selected polyphenols, including procyanidins B1 and B2, Tannic Acid, quercetin, and rutin, as well as those of a total white wine procyanidin extract on the conformational properties of the major wine protein VVTL1 (Vitis vinifera Thaumatin-Like-1) were investigated by Synchrotron Radiation Circular Dichroism (SRCD). Results showed that VVTL1 interacts with polyphenols as demonstrated by the changes in the secondary (far-UV) and tertiary (near-UV) structures, which were differently affected by different polyphenols. Additionally, polyphenols modified the two melting temperatures (TM) that were found for VVTL1 (32.2 °C and 53.9 °C for the protein alone). The circular dichroism (CD) spectra in the near-UV region revealed an involvement of the aromatic side-chains of the protein in the interaction with phenolics. The data demonstrate the existence of an interaction between polyphenols and VVTL1, which results in modification of its thermal and UV denaturation pattern. This information can be useful in understanding the behavior of wine proteins in presence of polyphenols, thus giving new insights on the phenomena that are involved in wine stability.
Özaca Mahmu - One of the best experts on this subject based on the ideXlab platform.
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Magnetically separable MnFe2O4/TA/ZnO nanocomposites for photocatalytic degradation of Congo Red under visible light
ELSEVIER, 2020Co-Authors: Elgassim Outra, Özaca Mahmu, Güy Nuray, Mohamed TrariAbstract:Recently, the use of carbon based materials and magnetic nanoparticles for supporting or coupling with metal oxides such as ZnO is a promising axis. The use of carbon materials enhances the photocatalytic performance of ZnO for the degradation of organic pollutants because of their properties. The introduction of magnetic nanoparticles such as manganese ferrite (MnFe2O4) to non-magnetic ZnO provides the easy separation of the photocatalyst from the treated water using a magnet and to improve its photoactivity in the visible region of the solar spectrum. This work was focused on the synthesis of a new magnetically separable composite photocatalyst including ZnO, MnFe2O4 and Tannic Acid (TA) by hydrothermal method. The as-prepared photocatalysts were characterized by X-ray diffraction (XRD), diffuse reflectance spectroscopy (DRS), field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR) and vibration sample magnetometer (VSM). The photocatalytic activities of the prepared photocatalysts were evaluated through the photocatalytic degradation of Congo Red (CR) under visible light and MnFe2O4/TA/ZnO exhibits the best photoactivity. The degradation yield of CR is 84.2% of CR over the MnFe2O4/TA/ZnO under the visible light for 90 min. At the end of five times recycling, the photocatalytic performance of CR presence the MnFe2O4/TA/ZnO can even reach nearly 77.5%. Such results demonstrate that the MnFe2O4/TA/ZnO exhibits great photocatalytic efficiency for CR compared to their constituent photocatalysts and easy separation from the dye solution by applying an external magnetic field
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A Photoelectrochemical Biosensor Fabricated using Hierarchically Structured Gold Nanoparticle and MoS2 on Tannic Acid Templated Mesoporous TiO2
'Wiley', 2020Co-Authors: Çakıroğlu Eki, Özaca MahmuAbstract:In a Tannic Acid assisted synthesis of mesoporous TiO2, Tannic Acid was used as a cost effective and non-toxic template for pore formation. Meanwhile, a gold nanoparticles (Au NPs) deposited TiO2 nanocomposite was coated on an indium tin oxide electrode for the fabrication of a photoelectrochemical (PEC) biosensing system. Upon the formation of anatase structure, the electrode was coated with MoS2 for effective visible light absorption. The mesoporous structure led to an enhanced surface area by improving Au NPs and glucose oxidase adsorption. Incorporation of Au NPs led to an enhanced photonic efficiency due to the generation of Schottky barriers. The obtained nanocomposite was used for the light-driven, real-time, and selective PEC glucose sensing. Under visible light irradiation, the enzyme immobilized electrodes yielded significant photocurrent improvement owing to the releasing electron donor H2O2. The obtained PEC biosensor demonstrated acceptable reproducibility and stability with a sensitivity of 4.42 mu A mM(-1) cm(-2) and a low detection limit of 1.2 mu M glucose. Also, the linear measurement range was found to be 0.004-1.75 mM glucose. The results indicated that the proposed production method of mesoporous TiO2 will pave the way for a green chemistry based porous material production, along with the extension of the implementation of semiconductors in PEC biosensing systems
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The pH dependent Tannic Acid and Fe-Tannic Acid complex dye for dye sensitized solar cell applications
ELSEVIER SCIENCE SA, 2019Co-Authors: Sone Caka, Özaca MahmuAbstract:We report a novel pH-dependent dye-sensitized solar cells by using Tannic Acid and Fe-Tannic Acid complex. We have synthesized TiO2 nanoparticles by microwave hydrothermal method, and TiO2 photoanode has been developed via doctor blade technique. The TiO2 nanoparticles and photoanode were characterized by XRD, FE-SEM, Raman and DRS technique. Dye-sensitized solar cells have been assembled by TiO2 photoanode and Tannic Acid or Fe-Tannic Acid complex dye as sensitizers at different pH values. The UV-vis absorbance and cyclic voltammetry results for these dyes at different pH values were discussed. The maximum cell efficiency of DSSC based on Tannic Acid and Fe-Tannic Acid dyes were 1.56% and 2.95% at pH 7.5, respectively. The cell efficiencies demonstrated decrement above and below pH 7.5, which was explained in detail in this study by suggesting possible reasons. In particular, the Fe-Tannic Acid structure at the range of pH 6-8 had comparable cell efficiency values compared to synthetic organic dyes. This phenomenon also gave a new way to the use of a novel simple cell with environmental friendly metal complex dye based sensitizers for dye-sensitized solar cells. This study has highlighted the importance of Tannic Acid and Fe-Tannic Acid at different pH values for solar cell efficiency. Additionally, the Fe-Tannic Acid sensitizer is an alternative to synthetic organic dyes and has advantages such as easy synthesis, low cost and abundantly found in nature
Shirvanimoghaddam Kamya - One of the best experts on this subject based on the ideXlab platform.
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Sustainable carbon microtube derived from cotton waste for environmental applications
'Elsevier BV', 2019Co-Authors: Shirvanimoghaddam Kamya, Ćwikła-bundyra Wiesława, Czech Ozena, Wiącek, Agnieszka E., Naebe MinooAbstract:© 2018 Elsevier B.V. Given its natural state and cost-effectiveness, cotton can be an ideal material for the fabrication of high performance catalyst and pollutant removal from the environment. In this study, novel carbon microtube derived from cotton waste were successfully prepared by thermal treatment of cotton in an argon atmosphere and used as a Tannic Acid sorbent. Carbon microtube (CMT) properties were investigated by electron microscopy (SEM, TEM), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), zeta potentiometer and N2 adsorption − desorption. The most stable solutions in water were established using CMT treated at 900 and 1300 °C and in Tannic Acid (TA) at 1100 and 1300 °C, respectively. Maximum TA sorption capacity, 596.5 mg g−1, was found for CMT treated at 1100 °C. The suitability of Langmuir model with simultaneously good fitting of other tested models of sorption implied that monolayer sorption was the first step of TA sorption onto CMT via π–π interactions and hydrogen bonds. Given the repeatability, high removal performance and cost effectiveness of the cotton based carbon microtubes when compared to other well-known sorbent such as carbon nanotubes, the carbon microtubes demonstrated great potential as low-cost and effective Tannic Acid (and dissolved organic matter) adsorbent
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Sustainable carbon microtube derived from cotton waste for environmental applications
'Elsevier BV', 2019Co-Authors: Shirvanimoghaddam Kamya, Czech Ożena, Wiącek Agnieszka, Ćwikła-bundyra Wiesława, Naebe MinooAbstract:Given its natural state and cost-effectiveness, cotton can be an ideal material for the fabrication of high performance catalyst and pollutant removal from the environment. In this study, novel carbon microtube derived from cotton waste were successfully prepared by thermal treatment of cotton in an argon atmosphere and used as a Tannic Acid sorbent. Carbon microtube (CMT) properties were investigated by electron microscopy (SEM, TEM), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), zeta potentiometer and N2 adsorption − desorption. The most stable solutions in water were established using CMT treated at 900 and 1300 °C and in Tannic Acid (TA) at 1100 and 1300 °C, respectively. Maximum TA sorption capacity, 596.5 mg g−1, was found for CMT treated at 1100 °C. The suitability of Langmuir model with simultaneously good fitting of other tested models of sorption implied that monolayer sorption was the first step of TA sorption onto CMT via π–π interactions and hydrogen bonds. Given the repeatability, high removal performance and cost effectiveness of the cotton based carbon microtubes when compared to other well-known sorbent such as carbon nanotubes, the carbon microtubes demonstrated great potential as low-cost and effective Tannic Acid (and dissolved organic matter) adsorbent. © 2018 Elsevier B.V