Browsing by Subject "Major chemistry"
Now showing items 21-40 of 320
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(Texas A&M University. Libraries, 1987)The results of this research indicate that [M⁺O⁻] centers (M = Group IA ions) in Group IA/Group IIA oxides are responsible for the catalytic production of CH₃[superscript dot] radicals from CH₄ through hydrogen atom ...
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(Texas A&M University. Libraries, 1980)A new method of determining the base sequence, the purity and the molecular weight of a chemically protected ribo- or deoxyribooligonucleotide is described. Using the method ²⁵²Cf-plasma desorption mass spectrometry positive ...
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(Texas A&M University. Libraries, 1975)Plasma desorption is induced by a ²⁵²Cf fission fragment penetrating a sample holder and sample. During the plasma desorption process, sample molecules become volatilized and ionized. The ions are accelerated into an ...
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(Texas A&M University. Libraries, 1995)The use of glucose film as matrix for 252CF-plasma
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(Texas A&M University. Libraries, 1990)Ruthenium metal on a zeolite support was found to be active for the catalytic synthesis of ammonia from dihydrogen and dinitrogen at temperature between 300 and 450°C and at atmospheric pressure. A triply-promoted iron ...
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(Texas A&M University. Libraries, 1980)A series of transition-metal-ion forms of phosphates of quadrivalent elements having the general formula X^[IV]M(PO4)2*yH2O(S^[IV] = Zr or Ti; M = Cu(II), Co(II) and Ni(II)) have been characterized. The electronic absorption ...
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Characterization of active sites and the effect of reduction and metal promoters on iron catalysts (Texas A&M University. Libraries, 1989)Infrared spectroscopy has been used as the principal method of characterizing the adsorption sites of iron-based catalysts. Nitric oxide and carbon monoxide were used as probe molecules to observe the effects of reduction ...
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(Texas A&M University. Libraries, 1994)Anodic oxide films are used extensively in a variety of applications. This study focuses on characterization of anodic oxide films grown on valve-type metals (Ti, Zr, Nb and Hf) under a variety of experimental conditions. ...
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(Texas A&M University. Libraries, 1977)The colored species (λ[subscript max] ~ 500 nm) formed form the reaction of nitric oxide with Lewis acids (BF₃, BCl₃, SiF₄, TiCl₄, and SnCl₄), SO₂, or HCL at 77°K has been characterized by resonance Raman and infrared ...
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(Texas A&M University. Libraries, 1989)Cf-252 plasma desorption mass spectrometry (PDMS) has been applied to the characterization of compounds which are difficult to analyze by conventional mass spectrometry. These included organic dyes (individual and mixtures) ...
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(Texas A&M University. Libraries, 1990)An investigation was made to characterize the structure of the interphase of polypyrrole in terms of semiconductor theory and the molecular structure of the polymer. This investigation was carried out by performing experiments ...
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(Texas A&M University. Libraries, 1988)High-performance liquid chromatographic procedures were used to study the ion-exchange selectivities of perfluorosulfonate ionomers (PFSI's). HPLC columns were packed with PFSI-coated octadecyl-derivatized silica and were ...
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(Texas A&M University. Libraries, 1990)With dioxygen-saturated (1 atm, 2.1 mM) dimethyl sulfoxide solutions that contain aniline (1-15 mM), the addition of excess hydroxide ion (10:1 HO-/PhNH2) yields approximately two superoxide ions (O2-), one azobenzene, and ...
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(Texas A&M University. Libraries, 1970)The CNDO/2 scheme is used to calculate the ground state wavefunctions for benzene, naphthalene, azulene, biphenylene, anthracene, phenanthrene, 1, 8 dimethylnaphthalene and 2, 3 dimethylnaphthalene. The core and resonance ...
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(Texas A&M University. Libraries, 1986)The anionic transition metal hydride, HM(CO)₄L⁻ (M = Cr, W; L = CO, P(OMe)₃, P(C₆H₅)₃, P(Me)₃) reacts with transition metal carbonyl dimers (Cp₂W₂(CO)₆, Cp₂Mo₂(CO)₆, Mn₂(CO)₈{P(C₆H₅)₃}₂, Mn₂(CO)₁₀, Co₂⁻ (CO)₈) to give ...
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(Texas A&M University. Libraries, 1987)A new entry into the area of low valent niobium and tantalum complexes containing metal-metal bonds is described. M₂X₆(μ-THT)(THF)₂ complexes, where M = Nb or Ta, X = Cl or Br and THT = tetrahydrothiophene, are conveniently ...
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(Texas A&M University. Libraries, 1994)The far-infrared and low-frequency Raman spectra of 1,3-Dioxole have been analyzed. The gas-phase far-infrared spectrum shows a series of eleven singlequantum- jump and three triple-quantum-jump transitions in the 40-330 ...
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(Texas A&M University. Libraries, 1990)Semi empirical computational methods can be used in conjunction with low frequency infrared and Raman spectra of gas -phase molecules to obtain information about large amplitude vibrations which are important for understanding ...
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(Texas A&M University. Libraries, 1995)
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(Texas A&M University. Libraries, 1991)A Pb/scintillator sampling calorimeter covering the pseudorapidity interval of n=0.83 to 4.20 has been designed and constructed for Experiment 814 of Brookhaven National Laboratory. The calorimeter uses wavelength shifting ...