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Smart Platform Development with Biomolecules for Biotechnological and Biomedical Applications- [electronic resource]
Smart Platform Development with Biomolecules for Biotechnological and Biomedical Applications- [electronic resource]
상세정보
- 자료유형
- 학위논문(국외)
- 자관 청구기호
- 기본표목-개인명
- 표제와 책임표시사항
- Smart Platform Development with Biomolecules for Biotechnological and Biomedical Applications - [electronic resource] / Zhu, Tao.
- 발행, 배포, 간사 사항
- 형태사항
- 1 online resource(174 p)
- 일반주기
- Source: Dissertation Abstracts International, Volume: 78-04(E), Section: B.
- 일반주기
- Adviser: Roberto Guzman.
- 학위논문주기
- Thesis (Ph.D.)--The University of Arizona, 2016.
- 요약 등 주기
- 요약The main objective of this dissertation is the synthesis and study of modified surface systems for the development of bioactive platforms and their use in specific biotechnological and biomedical applications. This work has led to various biological template development projects; all in attempts to provide new surfaces and probes in nanotechnology. These projects focus mainly on protein modified surface platforms, liposome based spherical platforms, and carbon nanotubes based magnetic platforms. The planar platforms include gold, silicon and aluminum oxide surfaces. Spherical surfaces such as liposomes and nanoparticles were also studied, and finally, surface modification was extended to carbon nanotubes and magnetic nanoparticles.
- 요약 등 주기
- 요약In this dissertation, the planar surface work focuses on demonstrating the behavior of proteins at interfaces in terms of conformation, stability and activity (e.g., of avidin, trypsin and antibodies) using fluorescence microscopy. Different ligands were attached chemically on the surfaces to incorporate hydrophobic hydrophilic and charged characteristics. A chelating agent (iminodiacetic acid, IDA), an affinity ligand (biotin), and reactive groups (amino and carboxylic groups) were covalently incorporated onto the surfaces. Proteins including myoglobin, cytochrome C, avidin, trypsin and immunoglobulin G (IgG) were used in this study. The results show that proteins and ligands were successfully attached to different surfaces. Protein adsorption studies illustrate activity decrease by using fluorescence intensity. after attachment on hydrophobic functionalized surfaces.
- 요약 등 주기
- 요약Along the same line, experiments were conducted on the comparison of silicon dioxide and gold-coated surfaces with immobilized enzymes, small molecules, and polymers for potential use as biosensors. Silicon dioxide wafers were prepared via silanization with 3-aminopropyl triethoxysilane (APTES) followed by glutaraldehyde activation and, finally, protein and/or small ligand attachment. Gold-coated surfaces were utilized for immobilizations using 16-mercaptohexadecanoic acid (MHA) which forms self-assembled monolayers (SAMs) on gold surfaces followed by covalently attachment of proteins. The activity of trypsin immobilized onto these surfaces was also measured. The silicon dioxide wafers when modified first with NH2-PEG-NH2 allowed for trypsin a relatively higher activity with about 11% greater activity than when attached on gold surfaces and 84% higher activity than on bare silicon surfaces. Furthermore, the bimolecular silicon dioxide surfaces were shown to be much more stable than the gold surfaces. The silicon dioxide surfaces with an immobilized reversible inhibitor, p-aminobenzamidine (PAB), show to very effectively bind proteins from solution compared to gold surfaces.
- 요약 등 주기
- 요약Liposome were studied because their versatility and vast implications in bio-sensing and drug-delivery potential. In this work, liposomes were prepared with the phospholipids 1,2-dimyristoyl-sn-glycero-3-phosphoethanolamine (DMPE), 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC) and cholesterol. The amino groups of DMPE were then modified with ligands that included iminodiacetic acid (IDA), and PEG. These functionalized liposomes were used to prepare dispersed gold "nano-dots" on their surface. These novel functional liposomes, with chelating ligands and polymers can be used to bind biomolecules and active compounds (nanoparticles of gold, quantum dots, drugs) with long stability. The results show that we can successfully manufacture functional liposomes and form gold nanoshells on their external surface. These two types of systems can be used as drug delivery, and as imaging systems. Their characterization and potential use in biomedical applications as contrast agents seems quite promising once complexity and stability of these gold nanoshells is elucidated.
- 요약 등 주기
- 요약The modification and preparation of functional-carbon nanotubes was investigated with the chemical hetero-junction analysis between magnetic nanoparticles coated poly-acrylic acid (PAA) and multi-wall carbon nanotubes (MWCNTs). Magnetic nanoparticles were covalently attached to open-ended nanotubes. Initial evidence suggests that short functionalized multi-wall nanotubes can be continuously connected at their terminal ends for build-up of relatively large nanostructures based on serial configurations. It is shown that magnetic carbon nanotubes systems exhibit defined arrangements due to the influence of magnetic fields. Indeed, linear arrays of carbon nanotubes inter-connected through magnetic nanoparticles were prone to be manipulated in the presence of a magnet device. A potential application of these magnetic nanostructures was shown by successfully manipulating agarose beads in buffer solution as a model system. These results suggest that the use of continuously connected magnetic nanostructures with non-modified sidewall surfaces will find potential applications in the areas of bio-sensing, force transduction and cancer screening-manipulation among others.
- 주제명부출표목-일반주제명
- 부출표목-단체명
- 기본자료저록
- Dissertation Abstracts International. 78-04B(E).
- 기본자료저록
- Dissertation Abstract International
- 전자적 위치 및 접속
- 원문정보보기
- 소장사항
-
20170404 2017
MARC
008170601s2016 us esm 001c eng■001MOKWON01253604
■00520170418115718
■007cr
■020 ▼a9781369185669
■035 ▼a(MiAaPQ)AAI10163925
■040 ▼aMiAaPQ▼cMiAaPQ
■090 ▼a전자도서(박사논문)
■1001 ▼aZhu, Tao.
■24510▼aSmart Platform Development with Biomolecules for Biotechnological and Biomedical Applications▼h[electronic resource]▼cZhu, Tao.
■260 ▼a[Sl]▼bThe University of Arizona▼c2016
■300 ▼a1 online resource(174 p)
■500 ▼aSource: Dissertation Abstracts International, Volume: 78-04(E), Section: B.
■500 ▼aAdviser: Roberto Guzman.
■5021 ▼aThesis (Ph.D.)--The University of Arizona, 2016.
■520 ▼aThe main objective of this dissertation is the synthesis and study of modified surface systems for the development of bioactive platforms and their use in specific biotechnological and biomedical applications. This work has led to various biological template development projects; all in attempts to provide new surfaces and probes in nanotechnology. These projects focus mainly on protein modified surface platforms, liposome based spherical platforms, and carbon nanotubes based magnetic platforms. The planar platforms include gold, silicon and aluminum oxide surfaces. Spherical surfaces such as liposomes and nanoparticles were also studied, and finally, surface modification was extended to carbon nanotubes and magnetic nanoparticles.
■520 ▼aIn this dissertation, the planar surface work focuses on demonstrating the behavior of proteins at interfaces in terms of conformation, stability and activity (e.g., of avidin, trypsin and antibodies) using fluorescence microscopy. Different ligands were attached chemically on the surfaces to incorporate hydrophobic hydrophilic and charged characteristics. A chelating agent (iminodiacetic acid, IDA), an affinity ligand (biotin), and reactive groups (amino and carboxylic groups) were covalently incorporated onto the surfaces. Proteins including myoglobin, cytochrome C, avidin, trypsin and immunoglobulin G (IgG) were used in this study. The results show that proteins and ligands were successfully attached to different surfaces. Protein adsorption studies illustrate activity decrease by using fluorescence intensity. after attachment on hydrophobic functionalized surfaces.
■520 ▼aAlong the same line, experiments were conducted on the comparison of silicon dioxide and gold-coated surfaces with immobilized enzymes, small molecules, and polymers for potential use as biosensors. Silicon dioxide wafers were prepared via silanization with 3-aminopropyl triethoxysilane (APTES) followed by glutaraldehyde activation and, finally, protein and/or small ligand attachment. Gold-coated surfaces were utilized for immobilizations using 16-mercaptohexadecanoic acid (MHA) which forms self-assembled monolayers (SAMs) on gold surfaces followed by covalently attachment of proteins. The activity of trypsin immobilized onto these surfaces was also measured. The silicon dioxide wafers when modified first with NH2-PEG-NH2 allowed for trypsin a relatively higher activity with about 11% greater activity than when attached on gold surfaces and 84% higher activity than on bare silicon surfaces. Furthermore, the bimolecular silicon dioxide surfaces were shown to be much more stable than the gold surfaces. The silicon dioxide surfaces with an immobilized reversible inhibitor, p-aminobenzamidine (PAB), show to very effectively bind proteins from solution compared to gold surfaces.
■520 ▼aLiposome were studied because their versatility and vast implications in bio-sensing and drug-delivery potential. In this work, liposomes were prepared with the phospholipids 1,2-dimyristoyl-sn-glycero-3-phosphoethanolamine (DMPE), 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC) and cholesterol. The amino groups of DMPE were then modified with ligands that included iminodiacetic acid (IDA), and PEG. These functionalized liposomes were used to prepare dispersed gold "nano-dots" on their surface. These novel functional liposomes, with chelating ligands and polymers can be used to bind biomolecules and active compounds (nanoparticles of gold, quantum dots, drugs) with long stability. The results show that we can successfully manufacture functional liposomes and form gold nanoshells on their external surface. These two types of systems can be used as drug delivery, and as imaging systems. Their characterization and potential use in biomedical applications as contrast agents seems quite promising once complexity and stability of these gold nanoshells is elucidated.
■520 ▼aThe modification and preparation of functional-carbon nanotubes was investigated with the chemical hetero-junction analysis between magnetic nanoparticles coated poly-acrylic acid (PAA) and multi-wall carbon nanotubes (MWCNTs). Magnetic nanoparticles were covalently attached to open-ended nanotubes. Initial evidence suggests that short functionalized multi-wall nanotubes can be continuously connected at their terminal ends for build-up of relatively large nanostructures based on serial configurations. It is shown that magnetic carbon nanotubes systems exhibit defined arrangements due to the influence of magnetic fields. Indeed, linear arrays of carbon nanotubes inter-connected through magnetic nanoparticles were prone to be manipulated in the presence of a magnet device. A potential application of these magnetic nanostructures was shown by successfully manipulating agarose beads in buffer solution as a model system. These results suggest that the use of continuously connected magnetic nanostructures with non-modified sidewall surfaces will find potential applications in the areas of bio-sensing, force transduction and cancer screening-manipulation among others.
■590 ▼aSchool code: 0009.
■650 4▼aChemical engineering
■690 ▼a0542
■71020▼aThe University of Arizona▼bChemical Engineering.
■7730 ▼tDissertation Abstracts International▼g78-04B(E).
■773 ▼tDissertation Abstract International
■790 ▼a0009
■791 ▼aPh.D.
■792 ▼a2016
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T14489352▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
■980 ▼a20170404▼f2017



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