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 44 for “"Highly Unstable"”.
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The Influence of Cellular Structure on the Dynamics of Detonations with Constant Mass Divergence
… mixtures, one displaying characteristic weakly unstable detonations (2C2H2 + 5O2 + 21Ar), and the other displaying highly unstable detonations (C3H8 + 5O2). The dependence of the velocity deficits and limits on the amount of mass divergence for the two mixtures were compared with the predictions …
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Structural and Spectroscopic Models of the [iron-Iron]-Hydrogenase Enzyme
… 4)(mu-CO)(CO)3(PMe3)(dppv)]+ [1(CO)4(PMe3)]+ is highly unstable and could only be observed under a CO atmosphere. The EPR spectrum for [1(CO)4(PMe3)]+ featured a doublet of triplets, coupled to three phosphorus nuclei with two distinct phosphorus hyperfine couplings (A(31P) = 283, 32 and 34 MHz). …
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Variations in grain boundary segregation for nanocrystalline stability and strength
… However, nanocrystalline metals are still highly unstable, mainly due to temperature related growth. Grain boundary segregation is one way in which materials can keep nano length-scale grains. This process involves metal alloys that preferentially segregate the alloying material to the …
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Captive Audiences: Sound and the Senses in Civil War Prisons
… the meaning of prison sounds and smells were highly unstable. Prisoners and guards disagreed on how to interpret them.
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Turning stealth liposomes into cationic liposomes for anticancer drug delivery
… interstitium. However, such a conjugate was highly unstable on shelf. Targeting the anticancer agents selectively to cancer cells is desirable to improve the efficacy and to reduce the side effects of anticancer therapy. Previously reported passive tumor targeting by PEGylated liposomes …
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Messenger RNA Destabilization by -1 Programmed Ribosomal Frameshifting
… no-go (NGD) decay pathways. Yeast EST2 mRNA is highly unstable and contains up to five -1 PRF signals. Ablation of the -1 PRF signals or of NMD stabilizes this mRNA. These same computational methods identified an operational programmed -1 ribosomal frameshift (-1 PRF) signal in the human mRNA …
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Development of ambient mass spectrometry methods for investigating iron-catalyzed oxidation reactions
… that often have extremely short lifetimes or are highly unstable when removed from the reaction medium. For this reason, numerous techniques and approaches have been developed over the years with the goal of identifying catalytic reaction intermediates. While spectroscopic methods often give …
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A Comparison of Two Methods Used to Deal with Saturation of Multiple, Redundant Aircraft Control Effectors
… case. Representative maneuvers are flown with a highly unstable airframe to evaluate the ability to achieve the specific task. Flight performance and pilot interpretation are used to evaluate the two methods. Pilot comments and performance results favored the method of pitch-axis prioritization. …
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Synthesis and Reactivity of Anthracene-Based Molecular Precursors for Low-Valent Boron Species
… The possibility to access species containing highly unstable boron-pnictogen triple bonds has also been explored via the synthesis of the azidoborane trimer (N₃BA)₃ and cyclic(alkyl)(amino)carbene (CAAC) stabilized boraphosphaketene ᵉᵗCAAC·ABPCO. Preliminary and ongoing reactivity studies are …
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Adaptive Control for Nonlinear, Time Varying Systems
… the tanks. This system is characterized by highly unstable rotational dynamics which are illustrated through simulation. An adaptive regulator is implemented to control the three-dimensional angular velocity to a desired operating point. It is shown that the adaptive controller provides …
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Visuomeninių patalpų oro tarša ozonu /
Ozone (O3) is a colourless and odourless, highly unstable gas that is a serious cause of air quality problems. In recent years, there has been a significant increase in public concern about poor indoor air ventilation. Indoor ozone is emitted mainly by photocopiers, laser printers, ozone generators …
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Searching for answers to the silent decline: first estimates of survival and recruitment for the critically endangered Rose's mountain toadlet, Capensibufo rosei
… be a natural population buffering mechanism to a highly variable microclimate, and that variable rainfall during the start of the breeding season may elicit a variable response in breeding investment by adults. Finally, I found evidence to suggest that the population is small, range-restricted and …
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Initiation and Evolution of the South Dakota Tornado Outbreak of 24 June 2003
… to their parent storms. A subset exhibited highly anomalous movement, with damage paths veering to the left of the translational motion of the parent storm. A review of published accounts of tornado paths in previous outbreaks shows leftward tornado movement motion is not uncommon, but it …
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Time-dependent Accretion Flows onto Black Holes
… major result is, that the transition region is highly unstable. Oscillating modes of the Rayleigh-instability leak into the inner hot flow and make its hydrodynamical and spectral properties highly variable. The characteristic frequency of the oscillations is near to the local keplerian orbital …
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Mechanisms of Palindrome-Mediated Chromosomal Instability
Palindromes are highly unstable DNA sequences that induce chromosomal rearrangements and underlie cancer and hereditary diseases such as Emanuel Syndrome. Despite being a significant source of genomic instability, the mechanisms governing palindrome fragility in eukaryotic cells are not fully …
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The Role and Regulation of Cyclin G2 in Human Ovarian Cancer Cells
… we have previously shown that cyclin G2 is highly unstable, and degraded very quickly by the ubiquitin-proteasome pathway. This study also suggests the calpain-mediated proteolysis is a major factor that contributes to the degradation of cyclin G2. This process is dependent on the presence …
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Some factors affecting the feeding ecology and socio-biology of the samango monkey, cercopithecus albogularis schwarzi roberts, 1931
… monkey and the study area was found to be highly unstable in comparison to them. The forest itself was found to exercise a buffering effect on all meteors examined, thus modulating this instability to a degree. The forest areas used by the monkeys were of mixed dominance and could be …
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Design of a Validated Stability Indicating HPLC Method for the analysis of Patrin-2 (Lomeguatrib).
… and reproducibility. The drug was found to be unstable when exposed to 0.4M of 30%H2O2. It was highly unstable in acidic condition, undergoing complete degradation in less than an hour when subjected to 0.1M H2SO4. It underwent high degradation when subjected to photolytic stress (UV …
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Role of the RING domain in MDM2-mediated ubiquitination of p53
… is that the interaction between the two is highly unstable. Here I show that MDM2 forms a stable isolatable interaction with UbcH5α, the C-terminal tail of MDM2 is not necessary for this interaction. Although RING E3 ligases were not previously thought to interact with ubiquitin, preliminary …
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Computational fluid dynamics modeling and in situ physics-based monitoring of aerosol jet printing toward functional assurance of additively-manufactured, flexible and hybrid electronics
… and host of strategic applications, AJP is a highly unstable and complex process, prone to gradual drifts in machine behavior and deposited material. Hence, real-time monitoring and control of AJP process is a burgeoning need. In pursuit of this goal, the objectives of the work are, as …
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