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Filtering by: Subject Aluminum Remove constraint Subject: Aluminum Degree Name Doctor of Philosophy (Ph.D.) Remove constraint Degree Name: Doctor of Philosophy (Ph.D.)

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  • Fatigue life, fatigue crack propagation and fracture toughness study of 7075 aluminum alloy subjected to thermomechanical processing

    Creator:
    Lee, Moon H. (Moon Hee), 1949-
    Abstract:
    Due to its high strength/weight ratio, 7075 aluminum alloy has been widely used as an aerospace material. However, it has relatively low fatigue strength and low fracture toughness in the T6 condition. Thermomechanical processing, including pre-cyclic loading and stretching at high and ambient temperatures, has been investigated with the aim...
    Resource Type:
    Dissertation
    Full Text:
    toughness study of 7075 aluminum alloy subjected to thermomechanical processing AN ABSTRACT OF THE THESIS

  • The ceriometric determination of hydrazine and aluminum

    Creator:
    Dernbach, Clifford James
    Resource Type:
    Dissertation
    Full Text:
    The Ceriometric Determination of Hydrazine and Aluminum

  • Influence of cations on aluminum toxicity in wheat (Triticum aestivum Vill., Host)

    Creator:
    Erfan Ali, Shaikh Muhammad
    Abstract:
    The toxicity of aluminum (Al) to wheat (Triticum aestivum Host) was studied under controlled conditions using a technique designed to evaluate the recovery of root growth following a relatively brief (48 hour) exposure to nutrient solutions containing Al, When wheat seedlings were exposed to a minimum critical concentration of Al,...
    Resource Type:
    Dissertation
    Full Text:
    Influence of cations on aluminum toxicity in wheat

  • Aluminum toxicity in the primary meristem of wheat roots

    Creator:
    Henning, Stanley John
    Abstract:
    The progression and consequences of aluminum toxicity were studied microscopically in the root tips of four wheat varieties representing different classes of Al tolerance. The root tips studied were collected from seedlings grown in nutrient solution cultures containing either sublethal or lethal Al treatments which were unique for each variety....
    Resource Type:
    Dissertation
    Full Text:
    -14(Major department) Title: ALUMINUM TOXICITY IN THE PRIMARY MERISTEM OF WHEAT ROOTS Abstract

  • The time-concentration interaction of Al toxicity in wheat root meristems

    Creator:
    Rhue, Roy Dean
    Abstract:
    The time-concentration interaction of Al toxicity in the root meristems of Brevor wheat was studied using the L.D. 50 as a criteria for Al damage. The L.D. 50 represented a precise, well defined degree of biological damage which was easily reproduced under conditions where factors like temperature, pH, nutrient concentration,...
    Resource Type:
    Dissertation
    Full Text:
    INTERACTION OF AL TOXICITY IN WHEAT ROOT MERISTEMS INTRODUCTION The primary effect of aluminum (Al) in wheat

  • Influence of aluminum toxicity in intergeneric crosses of wheat and rye

    Creator:
    Lopez-Benitez, Alfonso
    Abstract:
    A technique previously designed to screen wheat cultivars and segregating populations for tolerance to Aluminum utilizing nutrient solutions in growth chambers was found to be efficient in differentiating among cultivars of wheat, rye, and triticale for tolerance to Al under greenhouse conditions. A 5°C increase in temperature, from 25°C to...
    Resource Type:
    Dissertation
    Full Text:
    Influence of aluminum toxicity in intergeneric crosses of

  • Design of advanced aluminum silicon alloy compositions and processing

    Creator:
    Li, Xiao, 1963-
    Abstract:
    Part I discusses the development of an aluminum-magnesium-silicon alloy that may combine strength, extrudability, favorable corrosion resistance with low cost and scrap compatibility. The first part of the study determined the effects of small composition, heat treatment and mechanical processing changes on the ambient temperature tensile properties of the alloy....
    Resource Type:
    Dissertation
    Full Text:
    Design of advanced aluminum silicon alloy compositions and

  • Synthesis and characterization of aluminum oxide based materials - from molecule to device

    Creator:
    Wang, Wei
    Abstract:
    A scalable synthesis of the "flat" tridecameric inorganic cluster [Al₁₃(μ₃-OH)₆(μ-OH)₁₈(H₂O)₂₄]¹⁵⁺ has been realized by treating an aqueous aluminum nitrate solution with zinc-metal powder at room temperature. Single crystals and polycrystalline samples are readily obtained in yields exceeding 55% relative to the starting reagent Al(NO₃)₃. Products have been characterized by X-ray...
    Resource Type:
    Dissertation
    Full Text:
    , 2013. Title: Synthesis and Characterization of Aluminum Oxide Based Materials - from Molecule to

  • Aluminum toxicity studies in rice (Oryza sativa L.)

    Creator:
    Martinez-Racines, Cesar P.
    Abstract:
    A nutrient solution technique developed for wheat was used to determine tolerance of rice cultivars to aluminum (Al) toxicity. Pre-germinated rice seed was placed on top of a screen and allowed to grow on the Al-free solution for 72-96 hours or until the primary root was 2-3 cms long. Seedlings...
    Resource Type:
    Dissertation
    Full Text:
    : ALUMINUM TOXICITY STUDIES IN RICE (Oryza sativa L.) Abstract approved: Redacted for Privacy_ Warren E

  • Solubility of aluminosilicates in kraft green and white liquors

    Creator:
    Wannenmacher, P. Nick
    Abstract:
    The increasing occurrence of aluminosilicate caused complications in krafi pulp mills can be attributed to the closing of purge points and the expanded use of contaminated feedstocks and recycled fiber sources. An active purge of aluminum and silicon from the chemical recovery cycle must be undertaken in order to maintain...
    Resource Type:
    Dissertation
    Full Text:
    sources. An active purge of aluminum and silicon from the chemical recovery cycle must be undertaken in