348 research outputs found
Effect of photoperiod and other factors on the development of some short-day plants ...
http://www.worldcat.org/oclc/1979119
Alien Registration- Mckinley, William H. (Bradford, Penobscot County)
https://digitalmaine.com/alien_docs/10275/thumbnail.jp
A granular briquet resistance furnace for the electrothermic dry distillation of zinc ores
The work here described had for its purpose the development of a granular briquet resistance furnace for the electrothermic dry distillation of zinc ores --Introduction, page 1
Organizational downsizing: Constraining, cloning, learning
While downsizing rages through the U.S. economy, there is a great deal of uncertainty about its bottom-line effects. This uncertainty raises questions about why corporations have been so eager to engage in downsizing. In this article, we propose an answer to these questions. Three social forces, which we call constraining, cloning and learning, frequently provide a major impetus for downsizing. We describe these forces, and point out conditions that lead to the adoption of downsizing without due regard for its mixed consequences. We suggest methods to improve executives\u27 downsizing decision routines ... methods that should enhance the chances of achieving intended benefits
Synthetic and mechanistic studies of some nitrene insertion reactions
A short review of aromatic nitrene chemistry is presented in the Introduction, with particular emphasis with recent developments reported in the literature.
Part I of the discussion describes the thermolytic and photolytic decomposition of 2-azidotriphenylmethane in the presence of singlet and triplet sensitizing and quenching reagents. A hypothesis which attempts to relate the observed products to the spin state of the nitrene is discussed.
In Part II of the discussion, the preparation and thermolytic decomposition of 2-azido-4',4”-dimethoxytriphenyl- methane is described. Amongst other products, a novel bicyclic pyrido-indole derivative was isolated and a discussion on the mechanism of its formation is included.
In Part III is described the investigation into aromatic nitrene insertions in heterocyclic systems analogous to the di- and triphenylmethanes. Thus the attempted preparation of 2—(2— azidobenzyl)furan, and the successful preparation of c{, oC -di-(2- furyl)-2-nitrotoluene and its analogues are described. Deoxygenation of the methyl substituted analogue yielded a novel furyl carbazole ring system. The spectral characteristics of this compound and its attempted synthesis are discussed.
Full experimental details for Parts I, II and III are included in the last section of this thesis
Multi-Dimensional Nodalization of a Pressurized Water Reactor Core Using RELAP5-3D
This thesis work involves the use of the RELAP5-3D thermal hydraulic code to model flow for a typical pressurized water reactor (PWR). A model using several three-dimensional components was created to accurately predict complex accident scenarios with greater fidelity and detail than models consisting of only one-dimensional control volumes. In order to build this model, a one-dimensional model was first used as a reference and a foundation. The three-dimensional model was then constructed from this reference model using various techniques and methodologies. These are described in this thesis and represent best practices for similar work. Additionally, a tool was constructed to enhance the ease and accuracy of utilizing both Cartesian and cylindrical components. An overview of this tool is presented in this thesis, which includes verification and validation efforts as well as a discussion on its capabilities and use. After the three-dimensional model had been finalized, it was compared to its one dimensional analogue using a variety of metrics that demonstrate its consistency with the one dimensional reference. A detailed summary of this comparison is presented in this work. The final model was developed for use in Loss-of-Coolant Accident (LOCA) scenarios that simulate hypothesized situations relating to the Nuclear Regulatory Commission’s (NRC’s) Generic Safety Issue 191 (GSI-191). Thus, a standard of prudence was implemented (i.e. specifications) to ensure the model would be capable of accurately predicting phenomena associated with such scenarios
Precision metering of microliter volumes of biological fluids in micro-gravity
Concepts were demonstrated and investigated for transferring accurately known and reproducible microliter volumes of biological fluids from sample container onto dry chemistry slides in microgravity environment. Specific liquid transfer tip designs were compared. Information was obtained for design of a liquid sample handling system to enable clinical chemical analysis in microgravity. Disposable pipet tips and pipet devices that were designed to transfer microliter volumes of biological fluid from a (test tube) sample container in 1-G environment were used during microgravity periods of parabolic trajectories of the KC-135 aircraft. The transfer process was recorded using charge coupled device camera and video cassette equipment. Metering behavior of water, a synthetic aqueous protein solution, and anticoagulated human blood was compared. Transfer of these liquids to 2 substrate materials representative of rapidly wettable and slowly wettable dry chemistry slide surface was compared
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