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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
91

Partial purification and characterization of 1-aminocyclopropane-1-carboxylic acid n-malonyltransferase from etiolated mung bean

Ma, Chun-hang. January 2005 (has links)
Thesis (M. Phil.)--University of Hong Kong, 2006. / Title proper from title frame. Also available in printed format.
92

The reactions of indoles with acetylenic esters

Bridson, J. N. January 1970 (has links)
No description available.
93

The development of a combined reversed-phase chromatographic amperometric detection method for the assay of serum thyriod hormones /

Hepler, Bradford R. January 1981 (has links)
No description available.
94

Solvent extraction, gas chromatographic, and spectroscopic studies of some metal fluoroacetylacetonates /

Morie, Gerald Prescott January 1966 (has links)
No description available.
95

Determination of sulfur in organic compounds utilizing gas chromatography

Beuerman, Donald R. January 1961 (has links)
Call number: LD2668 .T4 1961 B48
96

Some factors affecting chromatographic separation of vitamin A on alumina

Deb, Shefalika. January 1962 (has links)
Call number: LD2668 .T4 1962 D43
97

Partial purification and characterization of 1-aminocyclopropane-1-carboxylic acid n-malonyltransferase from etiolated mung bean

Ma, Chun-hang., 馬進恆. January 2005 (has links)
published_or_final_version / abstract / Zoology / Master / Master of Philosophy
98

Factors affecting selectivity of covalent chromatography.

Crampton, Mary Catherine. January 1988 (has links)
Of the interactions utilized in the separation of chemical species, the reversible covalent bond is the strongest and most selective. In order to exploit the selectivity of this interaction, an understanding of the effects of several factors on the formation of the covalent bond have been studied. Covalent chromatography is most useful in solid phase extraction. The strength of the covalent bond will allow for high distribution coefficients needed to quantitatively retain chemical species. The selectivity of the covalent interaction allows for the retention of a specific compound or class of compounds. Under conditions where the covalent bond is no longer formed or will break, a low distribution coefficient is possible, and the compounds may be eluted from the sorbent in a small volume allowing for preconcentration. The sorbent consists of three parts, the active functionality capable of forming reversible covalent bonds, the solid support and the spacer arm that tethers the active functionality to the support. Silica supports demonstrate several advantages over organic supports. However, silica supports have been limited by the activity of the residual silanols and the use of hydrophobic spacer arms. This research describes the preparation and characterization of a modification method for silica with a hydrophilic spacer arm that restricts the sample from the residual silanols. Immobilized phenylboronic acid (PBA) interacts with compounds containing polar functionalities in the correct configuration, but this interaction is dependent on the local environment. Controlling the local environment allows for the control of the interaction provided the effects are understood. Diagnostic chromatography was used to determine the effects of the solvent strength, ionic strength, pH and composition of the mobile phase and the effects of the spacer arm on the interactions of PBA with several compounds. Three phases selective for thiols were also characterized. Thiopyridone attached to mercaptopropyl bonded silica through a disulfide linkage, is used for isolation and detection. Immobilized phenylmercury was utilized for the extraction of thiol containing species while immobilized phenylarsonous acid selectively extracts dithiol compounds. A unique and powerful means of separation of monothiol from dithiol compounds has been demonstrated.
99

ROLE OF BRILLIANT GREEN ON THE DETECTION AND SEPARATION OF NON-CHROMOPHORIC ANALYTES BY REVERSED-PHASE LIQUID CHROMATOGRAPHY (DIMERIZATION).

Trujillo Rebollo, Andres. January 1985 (has links)
No description available.
100

Improvement of chromatographic efficiency.

January 1982 (has links)
Yeung Wing Cheung. / Bibliography : leaf 91 / Thesis (M.Phil.)--Chinese University of Hong Kong, 1982

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