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Online since: September 2013
Authors: Jose Hector Hodak, Jiraporn Srisala, Kallaya Sritunyalucksana, Waret Veerasai, Somsak Dangtip, Leasen Suthisa, Toemsak Srikhirin
Detecting DNA-DNA Hybridization at 3-mercaptopropionic acid
Self- assembled on Tin-doped Indium Oxide Film with Electrochemical Measurement
Suthisa Leasen1, a, Jose Hector Hodak2,b, Jiraporn Srisala3,6, Toemsak Srikhirin1,4, Kallaya Sritunyalucksana3,6, Waret Veerasai5,
and Somsak Dangtip1,4,c
1Department of Physics, Faculty of Science, Mahidol University, Bangkok, Thailand
2INQUIMAE-DQIAyQF, Facultad de Ciencias Exactas y Naturales – Universidad de Buenos Aires, Buenos Aires 1428, Argentina
3Centex Shrimp, Faculty of Science, Mahidol University, Bangkok, Thailand
4NANOTEC CoE at Mahidol University, Faculty of Science, Mahidol University, Bangkok, Thailand
5IFEC-MU, Chemistry Department, CoE for Innovation in Chemistry, Faculty of Science, Mahidol University, Bangkok, Thailand
6National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, Pathumthani, 12120, Thailand
asainub@gmail.com, bjhodak@qi.fcen.uba.ar
Methylene blue, potassium ferricyanide and sodium citrate tribasic were obtained from Sigma-Aldrich, sodium chloride was purchased from Lab Scan and sodium borohydride was purchased from Laboratory Chemistry Inc.
The topographies were performed in Fig. 2 (a) and (b), ITO show crystallized structure, and MPA totally changed topography of ITO.
(a) (b) (c) Figure 5 Working principle diagram of electrochemical DNA sensor on MPA/ITO platform; (a) specific binding of MB to guanine base of probe ssDNA, (b) intercalating of MB into duplex structure of dsDNA and (c) MB specific binding to guanine of left end free and intercalating in the duplex. 4.
Methylene blue, potassium ferricyanide and sodium citrate tribasic were obtained from Sigma-Aldrich, sodium chloride was purchased from Lab Scan and sodium borohydride was purchased from Laboratory Chemistry Inc.
The topographies were performed in Fig. 2 (a) and (b), ITO show crystallized structure, and MPA totally changed topography of ITO.
(a) (b) (c) Figure 5 Working principle diagram of electrochemical DNA sensor on MPA/ITO platform; (a) specific binding of MB to guanine base of probe ssDNA, (b) intercalating of MB into duplex structure of dsDNA and (c) MB specific binding to guanine of left end free and intercalating in the duplex. 4.
Online since: May 2022
Authors: Muslih Anwar, Tutik Dwi Wahyuningsih, Nining Dwi Rahayu
Isolation and Green Methylation of Cardanol from Cashew Nut Shell Liquid
Muslih Anwar1,a, Nining Dwirahayu2,b and Tutik Dwi Wahyuningsih2,c*
1Research Unit for Natural Product Technology, National Research and Innovation Agency Republic of Indonesia, Gunungkidul, Yogyakarta, Indonesia
2Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Gadjah Mada, Sekip Utara PO BOX BLS 21 Yogyakarta 55281, Indonesia
amuslih .anwar@brin .go .id, bninink_dr@yahoo.ca, ctutikdw@ugm.ac.id
Keywords: CNSL, cardanol, methyl cardanol, green reagent, dimethyl carbonate
Abstract.
Structure of anacardic acid (a), cardol (b), and cardanol (c) Cardanol could be isolated by column chromatography; however, this method is not practical because high-cost and time-consuming.
FTIR of cardanol (a) and methylation of cardanol (b) by using DMS The structure of the product was confirmed by 1H-NMR and exhibited protons of long-chain carbon with a chemical shift at 0.91 (3H, m, –CH3), 1.34 (18H, b, –CH2–), 2.06 (4H, b, –C=C-CH2–), 2.60 (2H, t, –CH2–Ar), and 5.37 (2H, m, –C=CH) ppm.
John, Recent advances in cardanol chemistry in a nutshell: From a nut to nanomaterials, Chem.
Imawan, Green chemistry influences in organic synthesis: A review, J.
Structure of anacardic acid (a), cardol (b), and cardanol (c) Cardanol could be isolated by column chromatography; however, this method is not practical because high-cost and time-consuming.
FTIR of cardanol (a) and methylation of cardanol (b) by using DMS The structure of the product was confirmed by 1H-NMR and exhibited protons of long-chain carbon with a chemical shift at 0.91 (3H, m, –CH3), 1.34 (18H, b, –CH2–), 2.06 (4H, b, –C=C-CH2–), 2.60 (2H, t, –CH2–Ar), and 5.37 (2H, m, –C=CH) ppm.
John, Recent advances in cardanol chemistry in a nutshell: From a nut to nanomaterials, Chem.
Imawan, Green chemistry influences in organic synthesis: A review, J.
Online since: November 2012
Authors: Feng Na Xi, Fei Yan, Yao Fang Xuan, Xiao Ping Dong, Dong Jiao Zhao
Self-assembled Combination of Graphene with Au Nanoparticle-doped Copper-hexacyanoferrate Multilayer for Sensitive Detection of Hydrazine
Dongjiao Zhao1,2, Fei Yan1,2, Yaofang Xuan1,2, Xiaoping Dong1,2, Fengna Xi1,2*
1Department of Chemistry, Zhejiang Sci-Tec University, Hangzhou 310018, China
2Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Education Ministry,
Zhejiang Sci-Tec University, Hangzhou 310018, China
*Email Address: xx19811981@126.com
Keywords: Graphene, Au nanoparticle-doped copper hexacyanoferrate multilayer, Self-assembly, Hydrazine.
Reagents Graphite, MPA (99%), chloroauric acid (HAuCl4·4H2O), poly allylamine hydrochloride (PAH, MW120 000-200 000), PDDA (20%, w/w in water, MW 100 000–200 000), PSS (MW 70 000) and barbitone sodium were purchased from Aladdin Chemistry Co.
Such rapid response could attribute to the presence of graphene-AuNPs hybrid structure.
Fast diffusion in the porous and open three-dimensional graphene-AuNPs hybrid structure might occur12.
Acknowlegedgments The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (No. 21001093, No. 20805043), the Zhejiang Provincial Natural Science Foundation of China (Y4110418), the Science Foundation of Zhejiang Sci-Tech University (0913848-Y) and Zhejiang Provincial Top Key Academic Discipline of Applied Chemistry and Eco-Dyeing & Finishing Engineering (ZYG2010013).
Reagents Graphite, MPA (99%), chloroauric acid (HAuCl4·4H2O), poly allylamine hydrochloride (PAH, MW120 000-200 000), PDDA (20%, w/w in water, MW 100 000–200 000), PSS (MW 70 000) and barbitone sodium were purchased from Aladdin Chemistry Co.
Such rapid response could attribute to the presence of graphene-AuNPs hybrid structure.
Fast diffusion in the porous and open three-dimensional graphene-AuNPs hybrid structure might occur12.
Acknowlegedgments The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (No. 21001093, No. 20805043), the Zhejiang Provincial Natural Science Foundation of China (Y4110418), the Science Foundation of Zhejiang Sci-Tech University (0913848-Y) and Zhejiang Provincial Top Key Academic Discipline of Applied Chemistry and Eco-Dyeing & Finishing Engineering (ZYG2010013).
Online since: June 2020
Authors: Marco Miguel P. Parel, Marvin U. Herrera, Ivy R. Colambo
Introduction
Core-shell structures are particles that contain an inner core enwrapped in a shell.
Since a core-shell structure is a combination of different materials or different structures, materials made of core-shell structures often possess enhanced chemical, mechanical, electrical and physical properties in comparison to their single-component counterparts.
Fabrication of core-shell structures are executed to combine the desired properties of different materials or structures to be utilized in many applications.
Materials Chemistry and Physics 217 (2018), pp. 270-277
Composite Structures 93 (2011), pp. 2696-2705
Since a core-shell structure is a combination of different materials or different structures, materials made of core-shell structures often possess enhanced chemical, mechanical, electrical and physical properties in comparison to their single-component counterparts.
Fabrication of core-shell structures are executed to combine the desired properties of different materials or structures to be utilized in many applications.
Materials Chemistry and Physics 217 (2018), pp. 270-277
Composite Structures 93 (2011), pp. 2696-2705
Online since: June 2012
Authors: Cheng Long Yu, Xiu Feng Wang, Hao Wang
Preparation and Characterization of Copolymerized Aminohexylaminomethyl/Phenylsilsesquioxane Microparticles
Hao Wang1, 2,Xiufeng Wang1, 2, Chenglong Yu1
1.Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education, wanghao06@126.com, exw@sust.edu.com, 945480968@qq.com
2.School of Materials Science and Engineering, Shaanxi University of Science&Technology, Xi’an 710021, China
Keywords:Hydrolyticco-condensation,Poly(aminohexylaminomethyl/phenyl)silsesquioxane,Structural characterization
Abstract.
XRD patterns indicate that a certain ordered structure existed in PAHAMPSQ molecules.
Introduction Polysilsesquioxanes (POSS) have received consider attention owing to their unique structures and excellent properties[1-3].Poly phenylsilsesquioxane (PPSQ) and poly aminopropylsilsesquioxane (PASQ) have typical structure of POSS.
A sharp and well-defined νSi-O-Si at 1130cm-1 in S4 spectrum shows that the ordered structure is probable ladder-like or layered.
XRD patterns indicate that a certain ordered structure existed in PAHAMPSQ molecules.
Introduction Polysilsesquioxanes (POSS) have received consider attention owing to their unique structures and excellent properties[1-3].Poly phenylsilsesquioxane (PPSQ) and poly aminopropylsilsesquioxane (PASQ) have typical structure of POSS.
A sharp and well-defined νSi-O-Si at 1130cm-1 in S4 spectrum shows that the ordered structure is probable ladder-like or layered.
Online since: July 2021
Authors: Safa Abdul Salam Kamel, Haider A. Al-Jendeel, Wadood Taher Mohammed
The particle diameter was measured in College of Science/Chemistry Science Department using AFM of type AT3000, Angstrom advance Inc., USA 2008.
Fig. 4 illustrate Adsorption desorption isotherm of preparation SZ in order to evaluate the pore structures of the catalytic converters adsorption–desorption data is needed [22].
Crystallization of the structure could occur without any change in the sulfated species due to calcination of the condensate form of the hydroxyl groups of Zr(OH)4[20].
Reddy, “ Zirconia-Based Solid Acids: Green and Heterogeneous Catalysts for Organic Synthesis”, Current Organic Chemistry ,2011, 15: 3961-3985
Vera,"Superficial effects and catalytic activity of ZrO2–SO42− as a function of the crystal structure", Journal of Molecular Catalysis A: Chemical, 2015 ,398, 325-335. doi.org/10.1016/j.molcata.2014.12.015
Fig. 4 illustrate Adsorption desorption isotherm of preparation SZ in order to evaluate the pore structures of the catalytic converters adsorption–desorption data is needed [22].
Crystallization of the structure could occur without any change in the sulfated species due to calcination of the condensate form of the hydroxyl groups of Zr(OH)4[20].
Reddy, “ Zirconia-Based Solid Acids: Green and Heterogeneous Catalysts for Organic Synthesis”, Current Organic Chemistry ,2011, 15: 3961-3985
Vera,"Superficial effects and catalytic activity of ZrO2–SO42− as a function of the crystal structure", Journal of Molecular Catalysis A: Chemical, 2015 ,398, 325-335. doi.org/10.1016/j.molcata.2014.12.015
Online since: December 2012
Authors: Shi Hua Yuan, Ting Ting Lin, Xuan Wen Liu
Introduction
Metal complexes of the dmgI(here dmg represents H2dmg, Hdmg- and dmg2-) ligand have served as models for vitaming B12,have been shown to have some one-dimensional metallic properties, and have been of importance in analytical chemistry[1].
Here we report the crystal structure and the IR analyses for the title complex.
The structure has been determined by single crystal X-ray diffraction technique.
The structure of the title compound [Co(Hdmg)2(Him)2]×(ClO4) is built up of centro-symmetric mononuclear complex.
Fig.2 View of the binuclear crystal structure with the selected atom numbers.
Here we report the crystal structure and the IR analyses for the title complex.
The structure has been determined by single crystal X-ray diffraction technique.
The structure of the title compound [Co(Hdmg)2(Him)2]×(ClO4) is built up of centro-symmetric mononuclear complex.
Fig.2 View of the binuclear crystal structure with the selected atom numbers.
Online since: September 2013
Authors: Amir Al-Ahmed, Haitham M. Bahaidarah, Mohammad A. Jafar Mazumder
In both chemical and electrochemical syntheses of polyaniline, structure directing organic or inorganic molecules are added to the reaction mixture to get nano structured polyaniline, composites or copolymers.
Pletcher (Ed), Vol.10, Royal Society of Chemistry, London 1993, pp.117
Niki (Eds.), Redox Chemistry and Interfacial Behavior of Biological Molecules, Plenum Press, New York 1988, pp. 173
Morphology and chemistry of its oxidation and reduction in aqueous electrolytes, Faraday Trans. 82 (1986) 2385-2400
Harper, Review of Physiological Chemistry, 16th edition, Lange Medical Publications, San Francisko, CA, 1977
Pletcher (Ed), Vol.10, Royal Society of Chemistry, London 1993, pp.117
Niki (Eds.), Redox Chemistry and Interfacial Behavior of Biological Molecules, Plenum Press, New York 1988, pp. 173
Morphology and chemistry of its oxidation and reduction in aqueous electrolytes, Faraday Trans. 82 (1986) 2385-2400
Harper, Review of Physiological Chemistry, 16th edition, Lange Medical Publications, San Francisko, CA, 1977
Online since: December 2007
Authors: Tomasz Goryczka, Ewa Maciążek, Izabela Jendrzejewska, Karolina Kaczmarek
Polycrystalline Compounds Cd1-xNixCr2Se4 Obtained
by Ceramic Technology
Izabela Jendrzejewska1,a, Tomasz Goryczka
2,b,
Karolina Kaczmarek1, Ewa MaciąŜek1c
1
University of Silesia, Institute of Chemistry, Szkolna 9, 40-006 Katowice, Poland
2
University of Silesia, Institute of Materials Science, Bankowa 12, 40-006 Katowice, Poland,
a
izajen@wp.pl, bgoryczka@us.edu.pl, cmaciazek@onet.pl
Keywords: spinel, crystal structure, X-ray-diffraction, ceramic method.
The compound CdCr2Se4 crystallises in the MgAl2O4-type structure.
The compound NiCr2Se4 crystallises in the Cr3S4-type structure.
This structure is described as the NiAs-type structure with hexagonal close packing of the anions with all cations in octahedral coordinations [2, 4-6].
The spinel structure (Fig. 2) is stable only when the second cation present can occupy a tetrahedral site.
The compound CdCr2Se4 crystallises in the MgAl2O4-type structure.
The compound NiCr2Se4 crystallises in the Cr3S4-type structure.
This structure is described as the NiAs-type structure with hexagonal close packing of the anions with all cations in octahedral coordinations [2, 4-6].
The spinel structure (Fig. 2) is stable only when the second cation present can occupy a tetrahedral site.
Online since: December 2013
Authors: S.N. Grigoriev, Valery V. Kuzin
However, the creation of effective technologies of machining and operation of these details is hindered by imperfect understanding of mechanical processes in difficult structure material under technological and operational loads [1 – 3].
The microgeometry and the structure of the machine elements surface which are characterized by: (1) the grains size and shape, (2) the thickness of the intergranular phase, (3) the state of the interfaces between the grains, (4) the size and shape defects (5) the properties of the structure elements of SNM produce the local stress fields.
Of course, pores and cracks are also elements of real structure but their account complicates the mathematical model very much.
Structure (a), repeating elementary fragment (b) of SNM surface layer and calculation scheme (c) The calculation scheme is created on the basis of the microstructural model (Fig. 1, c).
References [1] Jing kun Guo, Stress design of the ceramic grain boundary, Materials Chemistry and Physics, 1996, Vol. 47. pp. 99-102
The microgeometry and the structure of the machine elements surface which are characterized by: (1) the grains size and shape, (2) the thickness of the intergranular phase, (3) the state of the interfaces between the grains, (4) the size and shape defects (5) the properties of the structure elements of SNM produce the local stress fields.
Of course, pores and cracks are also elements of real structure but their account complicates the mathematical model very much.
Structure (a), repeating elementary fragment (b) of SNM surface layer and calculation scheme (c) The calculation scheme is created on the basis of the microstructural model (Fig. 1, c).
References [1] Jing kun Guo, Stress design of the ceramic grain boundary, Materials Chemistry and Physics, 1996, Vol. 47. pp. 99-102