Tesi sul tema "3D crystal structure"
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Wennman, Anneli. "The structural basis for the catalytic specificity of manganese lipoxygenases : 3D structure analysis of the lipoxygenase of Magnaporthe oryzae". Doctoral thesis, Uppsala universitet, Institutionen för farmaceutisk biovetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-262762.
Markevičius, Andrius. "3D fotoninio kristalo užpildyto nematiniu skystuoju kristalu spektroskopiniai tyrimai". Master's thesis, Lithuanian Academic Libraries Network (LABT), 2010. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20100708_091750-48466.
We did structural and spectroscopic studies of bulk and thin film synthetic opal. Demonstrate that the photonic crystal, opal have defects, but these defects may be "good" when use it to control light in stop band.
Hossain, A. "Synthesis, crystal structure and properties of complex oxides with the perovskite structure based on neodymium, alkaline earth and 3d-transition metals : dissertation for the degree of candidate of chemical sciences : 02.00.04". Thesis, б. и, 2019. http://hdl.handle.net/10995/82032.
Hung, Jenny. "3D spherical layer photonic band-gap structures in dichromate gelatin /". View abstract or full-text, 2008. http://library.ust.hk/cgi/db/thesis.pl?PHYS%202008%20HUNG.
Sylvestre-Gonon, Elodie. "Caractérisation biochimique et structurale de quelques glutathion transférases de la classe Tau d'arabette (Arabidopsis thaliana) et de peuplier (Populus trichocarpa)". Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0253.
Glutathione transferases (GSTs) constitute a ubiquitous multigene superfamily of enzymes involved in xenobiotic detoxification and secondary metabolism. Canonical GSTs consist of an N-terminal thioredoxin domain and a α-helical C-terminal domain. In terrestrial plants, GSTs can be grouped in 14 classes but also according to the conserved residue found in their catalytic site either cysteine (Cys-GSTs) or serine (Ser-GSTs) GSTs. Ser-GSTs exhibit reduction of peroxides and/or glutathione (GSH) conjugation activities while Cys-GSTs rather exhibit deglutathionylation and dehydroascorbate reductase activities. Some of them also appear to have non-catalytic ligandin properties for the transport or storage of various molecules. The plant-specific Tau GST (GSTU) class is usually the most expanded one. The GSTUs are often over-expressed during biotic and abiotic stresses contributing notably to herbicide detoxification. However, the physiological role of most GSTUs is still poorly documented in planta. By combining phylogenetic, biochemical and structural approaches, this work led to the characterisation of nine GSTUs from Arabidopsis thaliana (AtGSTUs) and six GSTUs from Populus trichocarpa (PtGSTUs). Phylogenetic analysis of the Ser-GSTs present in photosynthetic organisms revealed that the expansion of GSTUs occurred concomitantly with the appearance of vasculature in plants, although some mosses and bryophytes possess GSTUs. Within an organism, GSTUs can be classified into distinct groups according to their catalytic motif. Enzymatic tests using recombinant proteins showed that almost all studied GSTUs exhibit GSH conjugation and peroxide reduction activities against different model substrates (CDNB, isothiocyanate derivatives, hydroperoxides). The three-dimensional structures of two GSTUs have been resolved and these adopt the classical canonical GST fold with some notable difference between them. The biochemical and structural analyses of these AtGSTUs and PtGSTUs further showed that some of them bind bacterial porphyrins while others bind polyphenolic compounds. Among the enzyme-ligand complexes identified, the structure of a bacalein-GSTU has been solved. The use of metabolites enriched samples extracted from A. thaliana and P. trichocarpa is the next step to decipher the role of GSTUs in planta
Cohoon, Gregory A. "Fabrication, Characterization, and Application of Microresonators and Resonant Structures". Diss., The University of Arizona, 2016. http://hdl.handle.net/10150/595953.
Do, Mai Trang. "Fabrication of submicrometer 3D structures by one-photon absorption direct laser writing and applications". Thesis, Cachan, Ecole normale supérieure, 2015. http://www.theses.fr/2015DENS0001/document.
This work deals with a novel microscopy technique based on the ultra-low one-photon absorption (LOPA) mechanism of photosensitive materials for fabrication of arbitrary two- and three-dimensional (2D, 3D) submicrometer structures. First, we theoretically investigated the intensity distribution at focusing region of a high numerical aperture objective lens as a function of various working conditions, such as propagation of light mismatched refractive index and/or absorbing media. We demonstrated that when working with refractive index mismatch-free and very low absorption conditions, the light could be focused deeply inside the material, allowing a 3D optical manipulation. We then demonstrated experimentally the use of this simple technique for fabrication of desired structures. Different 2D and 3D structures, with a feature as small as 150 nm, have been created in SU-8 photoresist by using a low power and continuous-wave laser emitting at 532 nm. Furthermore, we demonstrated that it is possible to fabricate a polymer-based photonic structure containing a single nanoparticle (NP), by using a double-step method. Indeed, the LOPA microscopy allowed us first to accurately determine the location of a single gold NP and then to embed it as desired into an arbitrary SU-8 photonic structure. The coupling of a gold NP and a polymer-based photonic structure was theoretically and experimentally investigated showing a six-fold photons collection enhancement as compared to that of a NP in unpatterned film
Kulkarni, Aditya. "Simulation of three dimensional current spreading in photonic crystal VCSEL structures". Thesis, Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/28254.
SRIDHAR, SUPRIYA LALAPET. "Design, Simulation and Physical Characterization of 3D Photonic Crystal Woodpile Structures for High Efficacy Incandescent Thermal Emission". University of Cincinnati / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1218030876.
Gaillot, Davy Paul. "Optical Properties of Complex Periodic Media Structurally Modified by Atomic Layer Deposition". Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/14635.
Anic, Branimir [Verfasser], e W. [Akademischer Betreuer] Dörfler. "The Fourier-Galerkin Method for Band Structure Computations of 2D and 3D Photonic Crystals / Branimir Anic. Betreuer: W. Dörfler". Karlsruhe : KIT-Bibliothek, 2013. http://d-nb.info/1048384896/34.
Huang, Yi-Da, e 黃奕達. "Study and Fabrication of 3D Structure Photonic Crystal Fiber". Thesis, 2007. http://ndltd.ncl.edu.tw/handle/27373124744955114184.
國立臺灣大學
光電工程學研究所
95
In the past ten years, photonic crystal fibers (PCFs) have been widely researched. This special type of fibers, with two-dimensional periodic cladding, provides many impressive properties, such as large mode area, endlessly single mode, etc. Recently, PCFs with periodic modulation in the transmission direction are also developed, increasing the periodicity from 2D to 3D. In literature, 3D structure PCFs have been used as fiber gratings and are more efficient than common fibers because of their larger index difference in constitute material. In this thesis, CO2 laser was employed to periodically modulate the diameter of PCF. There are some advantages to fabricate 3D structure PCF by laser heated pedestal growth (LHPG) system: First, many UV-induced gratings will degrade by time, and the Ge doping in core destroys the original physical properties of the fiber. In contrast, the grating fabricated by CO2 laser is stable even in high temperature. Second, the common laser-heated system always heats the fiber in one or two directions, which may induce larger birefringence effect. The ring heating design of our LHPG system has higher symmetry than any other laser-heated system in literature, which may reduce local collapse of the hole structures in PCF and maintain the transmission characteristics. Two methods, periodical control of shutter or motor stages, were used to fabricate 3D structure PCF with about 224.25 micron pitch. The fabricated structure served as a notch filter and the peak attenuation of 16 dB at 1557.5 nm was achieved. Numerical simulations based on a commercially available beam propagation method (BPM) software and coupled-mode theory were used to model the 3D structure PCF. The simulated result agrees well with our fabricated 3D structure PCF.
Huang, Anny, e 黃安妮. "Synthesis,Crystal Structure and Magnetic Behavior of Heterometallic 3d-4f Coordination polymers". Thesis, 2009. http://ndltd.ncl.edu.tw/handle/42877376100981646693.
國立成功大學
化學系碩博士班
97
The assembly of heterometallic 3d-4f ions and organic ligands, 6-(5-carboxypyridin-2-ylthio)pyridine-3-carboxylate ([S(C5H3NCO2)2]2-, TIN) and 3-mercaptopropionate ((2OCC2H4S)2-, TPC), have successfully constructed a series of metal-organic frameworks by the solventhermal reactions. Single-crystal structures, elemental analyses, infrared records, and magnetic behavior were characterized for these compounds. Six compounds possessing the same structure were discovered in the series of [Cu12Ln2(H2O)2(TPC)6Cl6].4H2O where Ln denotes Nd(1), Eu(2), Gd(3), Tb(4), Dy(5), and Er(6). Unique [Cu12S6] clusters, rhombic [Gd2O2] units are formed in this structure, which are interconnected by TPC ligands. Within the cluster, known as Altas-sphere, twelve Cu+ ions are fused together through μ4-S atoms. The [Cu12S6] clusters are bridged together by Cl– ions into a network with square-like windows. The networks are then supported by the [Gd2O2] units into an open framework in 3, where water molecules are encapsulated within the tunnels along the a axis. The magnetic study of Gd compound displays interesting ferromagnetic behavior at the low temperature that phenomenon could be caused by the asymmetric geometry of the [Gd2O2] units. The compound GdCu2(H2O)2(TIN)3Cl (7) crystallizes into a new network. First, the 1D zigzag chains are formed by [CuN4Cl] and [CuN2O3] units, which are alternatively connected through TIN ligands. Further, the chains are fused together with Gd3+ ions by another two distinct sites of TIN ligands to form the 2D layer in 7. The network are packing by ��-�� interactions along the a axis.
Chikhale, R., S. Menghani, R. Babu, Ratnadeep V. Bansode, G. Bhargavi, Nazira Karodia, M. V. Rajasekharan, Anant R. Paradkar e Pramod Khedekar. "Development of selective DprE1 inhibitors: Design, synthesis, crystal structure and antitubercular activity of benzothiazolylpyrimidine-5-carboxamides". 2015. http://hdl.handle.net/10454/7338.
Decaprenylphosphoryl-b-d-ribose 20-epimerase (DprE1) is a potential drug target for development of antitubercular agents. Structure based drug discovery approach yielded twenty novel derivatives of benzothiazolylpyrimidine-5-carboxamides (7a–t) which were synthesised by three component one pot reaction involving benzothiazolyl oxobutanamide, thiourea and substituted aromatic benzaldehydes. These derivatives were evaluated for antitubercular activity to determine MIC and compound 7a, 7e, 7f and 7o were found to be potentially active against Mycobacterium tuberculosis (H37Rv). Log P of these compounds was found to be between 2.0 and 3.0 making them suitable for oral dosing. DprE1 selectivity and pharmacokinetic studies were carried out for these compounds of which 7a and 7o were found to be highly selective and bioavailability was found to be above 52% by oral dose. Crystal structure of 7a was studied and molecular packing was determined, it exhibited a triclinic crystal lattice arrangement having hydrogen bonded dimeric arrangement. Drug receptor interactions were studied which exhibited docking in the active site of receptor with hydrogen bonding, hydrophobic interactions, vdW interactions with amino acid residues such as Cys387, Asn385, Lys418, Tyr314, Gln334 and Lys367 respectively. 3D QSAR analysis was carried out by kNN-MFA method to determine and develop theoretical model, best suitable model was found to be based on Simulated Annealing k-Neariest Neighbour Molecular Field Analysis (SA kNN-MFA). The model provided with hydrophobic descriptors in positive side indicating the need of bulky groups, steric and electronegative descriptors in negative coordinates hints with contribution by the electronegative substitutions as favourable and desirable moieties for enhancing the activity. The q2, q2_se and Pred_r2se were found to be 0.5000, 0.6404 and 1.0094 respectively. A pharmacophore model was generated which suggested for necessity of aromatic, aliphatic carbon centre and hydrogen bond donor for development of newer DprE1 selective inhibitors.
Council of Scientific and Industrial Research
Sannigrahi, Jhuma. "Study of magnetic and dielectric properties of 3d transition metal oxides". Thesis, 2019. http://hdl.handle.net/10821/8286.
The research was carried out under the supervision of Prof. Subham Majumdar of Solid State Physics division under SPS [School of Physical Sciences]
The research was conducted under IACS fellowship
Kuo, Jen-Hao, e 郭人豪. "Low Voltage and High Transmittance Blue Phase Liquid Crystal Displays with 2D/3D Continuous Electrode Structures". Thesis, 2018. http://ndltd.ncl.edu.tw/handle/4zv38g.
國立臺灣大學
光電工程學研究所
106
Blue phase liquid crystal display is a popular research topic for the liquid crystal display. Because of its sub-millisecond response time and its display without alignment layer that make it be fabricated easier. However, the primary problems of blue phase liquid crystal are low transmittance and high operating voltage. Many theses aim to design different electrode structures to improve the high operating voltage and low transmittance. Most theses aim to design two-dimension electrode structures about parameters on X-Z direction. Therefore, we design the three-dimension electrode structures and hope that new structures can reduce the dead zone on y-direction. At first, we refer to three kinds of 2D electrode structures to design three kinds of 3D electrode structures. We discover that 3D electrodes have the problem of central dead zone and the problem influence the transmittance of the display. After the analysis, the 2D electrodes still have the highest transmittance. However, 3D electrodes also have their advantage. 3D electrodes have higher transmittance at low operating voltage if the electrode gap is small. Then we refer to Diamond-shape electrodes to design continuous electrodes to reduce the central dead zone on expectation so we compare continuous electrodes with Diamond-shape electrodes first. The result is that the pointed diamond electrodes have higher transmittance in comparison with Diamond-shape electrodes generally ( ). The enhanced Diamond electrodes have higher transmittance and lower operation voltage in comparison with Diamond-shape electrodes. In the end, we compare continuous electrodes with 2D and 3D electrodes. Among 2D, 3D triangle and pointed diamond electrodes, 2D triangle electrodes have the highest transmittance with large gap but 3D triangle electrodes have the higher transmittance at low voltage with small gap. Pointed diamond electrodes have high transmittance over 75% with most electrode gaps. Among 2D, 3D enhanced trapezoid and enhanced diamond electrodes, 2D enhanced trapezoid electrodes have the highest transmittance with large gap but 3D enhanced trapezoid electrodes have the higher transmittance at low voltage with small gap. Enhanced diamond electrodes have high transmittance over 80% with most electrode gaps. In terms of transmittance vs electrode gaps, continuous electrodes combine the features of 2D and 3D electrodes. Continuous electrodes have less sensitivity on electrode gaps compared to 2D and 3D electrodes with reasonably high transmittance.
Kulik, Victor. "Structure of Bovine Liver Catalase Solved by Electron Diffraction on Multilayered Crystals". Doctoral thesis, 2005. https://repositorium.ub.uni-osnabrueck.de/handle/urn:nbn:de:gbv:700-2005071317.
Bulovyatov, Alexander [Verfasser]. "A parallel multigrid method for band structure computation of 3D photonic crystals with higher order finite elements / von Alexander Bulovyatov". 2010. http://d-nb.info/1003331718/34.
Müller, Sven. "Structural and optical impact of transition metal implantation into zinc oxide single crystals and nanowires". Doctoral thesis, 2009. http://hdl.handle.net/11858/00-1735-0000-0006-B487-7.