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Filtering by: Subject Extraction (Chemistry) -- Methodology Decade 1970-1979

Methods of extraction and characterization of polyphenol oxidase from d'Anjou pears (Pyrus Communis L.)

Creator:

Smith, Denise Myrtle

Abstract:

Using phenolic scavengers different methods were examined to determine the optimum conditions for extracting polyphenol oxidase (PPO) from d'Anjou pears. Efficiency of the extraction was evaluated based on browning of the extract, PPO activity per g of pear tissue, absorption scan of 410 nm to -240 nm, and the isozyme...

Resource Type:

Masters Thesis

Full Text:

^ ,,, Title: Methods of Extraction and Characterization of Polyphenol Oxidase fromit-'Anjou Pears (Pyrus
Photochemical degradation of sediment organic matter : effect on Zn-65 release

Creator:

Lenaers, William Michael

Abstract:

Columbia River sediment was irradiated with ultraviolet light to determine if organic material could be removed without altering the sorptive properties of the hydrous oxides of iron and manganese. A laboratory preparation of Zn-65 spiked hydrous ferric oxide was subjected to ultraviolet irradiation in order to assess the photochemical effect...

Resource Type:

Masters Thesis

Full Text:

. TABLE OF CONTENTS Page INTRODUCTION 1 General Statement 1 Background Information 4 Chemistry of Zinc