Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 97 for “"S4"”.
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The S4 infrastructure management system
This thesis describes the design and implementation of a system for managing the infrastructure supporting a course relying on a large computer lab. Students' information privacy and security was an important focus in the design of this system, as well as integration with existing software systems …
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An Investigation into the Effects of Alterations in Ribosomal Proteins S4 and S5 on Translational Accuracy, Ribosomal RNA Processing, and Ribosome Assembly
… carried out by the ribosome. Ribosomal proteins S4 and S5 are critical for the decoding and the assembly processes on the ribosome. The interaction between residues in the S4-S5 interface region is crucial for the large scale conformational changes occurring on the ribosome during decoding. …
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Electrostatic Interactions in the Voltage Sensor of Kv7.1 and Iks Channels
… is comprised of four transmembrane helices (S1-S4), with conserved basic residues in S4 moving across the membrane in response to changes in transmembrane voltage and conserved acidic residues in S2 and S3 that may stabilize S4. The movement of S4 is the key initial step of the gating process …
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Luminescence Resonance Energy Transfer Studies of the Shaker Potassium Voltage-Gated Ion Channel
… a highly charged segment of the channel called S4. When a channel opens it moves some of these S4 charges across the membrane electric field. The movement of four S4s, one from each identical subunit of Shaker, is coupled to the ""gate"" which opens and closes the pore. Therefore, a central …
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Solid state superionic stamping design for large area patterning
Solid state superionic stamping (S4) is a non-photolithographic process for etching features into thin metal films which has shown the capability of reproducing features below 100 nm in recent years. The technique has significant potential because in addition to its high resolution capability it is …
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Using structure to explore the sequence alignment space of remote homologs
… Chapter 3 explains the methodologies of S4 -- the alternative alignment program we developed that is the main focus of this thesis. The process of finding alternative alignments with S4 involves several steps, but can be roughly divided into two main parts. First, the program looks for …
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Simulation and Visualization of Dynamics in RNA·protein Complexes in Translation
… is held together by the universal r-protein S4. We characterize the dynamics and flexibility of the free S4 structural signature and rRNA signature helix 16 (h16) as well as the S4·h16 complex. Investigation into the folding and binding of these components will be carried out using …
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Solid state electrochemical processes for nanofabrication
… known as solid-state superionic stamping (S4) to selectively etch silver and copper. The technique currently allows the fabrication of sub-100 nm features on a planar surface over an area of 0.26 mm2 and micron scale features over an area of 25 mm2. The later part of this thesis …
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Structure and function of potassium and calcium channels
… a preliminary picture obtained. No studies of S4 movement in calcium channels have been reported previously. Cysteine residues were substituted into the domain I S4 of a calcium channel chimera (with domain I of Ca, 3.1 replaced by Caj. 2). Cysteine residues at positions 263,265,266,268,269 and …
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Scalable direct electrochemical nanopatterning of silver films
… applications. Solid-State Superionic Stamping (S4) is an electrochemical nano-imprinting process that is capable of directly patterning silver nanostructures. In this thesis, we demonstrate a simple method to scale up S4 patterning of silver using a plate-to-roll (P2R) format to explore the …
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Volumetric Properties and Viscosity of Lubricant Oils and the Effects of Additives at High Pressure and Temperatures
… mineral and synthetic base oils, including Ultra S4, Ultra S8, and poly alpha olefin PAO 4 have been studied. Among the various types of additives explored were viscosity index modifiers, polyisobutylene polymers (PIBs), and dispersants. The viscosity index modifiers are studied in terms of …
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Molecular and functional study of splice variations of the L-type voltage-gated calcium channel CaV1.2 alpha1-subunit
… and two of these were novel exons. A large IVS3-S4 variability resulting from combinatorial utilization of exons 31-33 demonstrated a correlation between increased IVS3-S4 linker length and more depolarized activation potentials.Sixty-four splicing profiles of CaV1.2 alpha-1 subunit were …
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Further analysis of solid state superionic stamping for nanoscale fabrication
… process called solid state superionic stamping (S4) using AgIAgPO& glass as the solid electrolyte to pattern and transfer nanostructures on the silver. This technology is economically low-cost, high efficiency, and environmentally friendly. The whole process will not generate liquid waste or …
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Comparative Genomics of Selected Species of Gram-Negative Bacteria
… using sequence information from strain Schu S4. The completed genome sequence of FSC198 showed it to be almost identical to that of Schu S4. The two genomes differ at only 11 loci, eight SNPs (single nucleotide polymorphisms) and 3 VNTRs (variable number tandem repeats). This surprising …
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Evolution and assembly of the ribosome
… afterwards. The universally conserved r-protein S4 is likely an ancient protein due to its role in the initiation of the 30S assembly, control of the translational accuracy, and regulation of the conserved operon. However, the N-terminal domain of S4 is identified as a “molecular signature” that …
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Synthesis and characterization of "non-shrinking" nanocomposites for dental applications
… into experimental nanocomposites (S1 a?? S4) by reinforcing with 63 wt% of commercial fillers. The experimental nanocomposites (S1 a?? S4) were then characterized for their physico-mechanical properties such as polymerization shrinkage, hardness, modulus, depth of cure, degree of …
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Tetrathiometallates in Synthesis and Catalysis
Finally, Et4N[ReS4] has also been shown to react with isocyanides (MeNC, t-BuNC, CyNC) which add across the S=M=S functionality via a 3+1 cycloaddition process in the presence of S 8 to form Et4N[Re(S)(S4)(S2CNR)]. This type of cycloaddition has not been observed before for metal sulfides.
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Reproductive performance of dorset ewes in the star accelerated lambing system
… 1 (Sl), March 15 (S2), May 27 (S3), August 8 (S4) and October 20 (S5). Optimally, a ewe could lamb every 7.2 mo beginning at 1 yr of age, Records on 1,084 ewes over 7 yr beginning S1, 1982 Reproductive traits considered were ewe fertility, prolificacy, days to first lambing (DFL) and days …
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Synthesis and Maldi-Ms Characterization of New Ruthenium Sulfide Clusters
… investigated. The distorted heterocubane Ru4 S4(NO)4(PPh3)3 was crystallographically characterized and a related cluster with formula Ru4S3(NO) 4(PPh3)3, possibly corresponding to a partial heterocubane structure, was identified using MALDI-MS and IR spectroscopy.
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Solid-state superionic stamping: Patterning 3D metallic micro- and nanostructures for surface enhanced Raman sensing
… known as Solid-State Superionic Stamping (S4), for the selective etching of silver and copper. S4 is a single-step, highly scalable, all solid-state process that can be performed under ambient conditions, offering high throughput and repeatability. In the pursuit of biosensing applications …
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