Organisms Commons^™

A Study Of Naturally Occurring Algicides Produced By Freshwater Algae, Denny O. Harris, Harry D. Caldwell

KWRRI Research Reports

The mode of action of the algicide produced by Pandorina morum was examined by exposing Volvox globator and isolates spinach chloroplasts to a partially purified algicide preparation. Oxygen evolution of Volvox, whole chloroplasts and broken chloroplasts (minus the Calvin cycle),was reduced indicating that the algicide inhibits the light reactions of photosynthesis. Oxygen evolution studies of other Volvocaceae confirmed the observation that Pandorina morum is not significantly influenced by its own inhibitor. Molecular weight approximation by gel filtration established that the inhibitor has a low molecular weight (probably below 100 mw). Field studies indicate that this algicide has tremendous potential as …

Metabolic Capabilities Of Sulfur Oxidizing Bacteria And Their Role In Water Pollution, M. I. H. Aleem

KWRRI Research Reports

This report describes investigations into the physiology of microorganisms that are commonly involved in the oxidation of inorganic sulfur compounds. The metabolic activities of these bacteria play a potent role in several fields of economic importance such as strip mining operations, water pollution, corrosion, metallurgy, petroleum technology and soil fertility processes.

The oxidation of inorganic sulfur compounds was studied in the chemolithotrophs Thiobacillus denitrificans, Thiobacillus A₂, Thiobacillus neapolitanus, and a photolithotroph Rhodopseudomonas palustris. Cell suspensions from all of the thiobacilli catalyzed completely the oxidation of sulfide, thiosulfate, and sulfite to sulfate. The oxidation of thiosulfate in R. palustris …

Oral History Interview: Josephine R. Gorby, Josephine R. Gorby

0064: Marshall University Oral History Collection

Josephine Gorby was born on February 24, 1908. She began her teaching career in a one-room school in Wimmer, McDowell County, WV. In 1931 she began teaching in Lawrence County, OH. Mrs. Gorby’s interview focuses on growing up on a farm near Proctorville, OH, her experiences as an educator, her family’s experience during World War I, and the 1937 flood of the Ohio River and its tributaries. In the audio clip provided, Mrs. Gorby discusses the impact of the 1937 flood on the school house in Athalia, OH. During her interview, she also focuses on the construction and use of …

Oral History Interview: Edward C. Jackson, Edward C. Jackson

0064: Marshall University Oral History Collection

Edward C. Jackson was born on January 17, 1911, in Canfield, Braxton County, WV. In 1926, he moved to Fenwick, Nicholas County, WV, to pursue jobs in saw mills. In his interview, Mr. Jackson describes in great detail the design and structure of the log home he lived in as a child. He focuses on growing up on a farm and places emphasis on the type of work he did and food preparation and preservation. Mr. Jackson also discusses the tight-knit community in which he was raised. In the audio clip provided, Mr. Jackson discusses working in the lumber industry. …

The Lasting Antimicrobial Qualities Of Three Root Canal Sealing Materials : Grossman's Sealer, Rickert's Sealer, And N2 Permanent, Lee R. Ingersoll

Loma Linda University Electronic Theses, Dissertations & Projects

An in vitro study using polyethylene tubes filled with Grossman's sealer, Rickert's sealer, and N2 permanent was conducted over a six month period in an effort to determine their lasting antimicrobial properties against eight different microorganisms.

From the study it was observed that N2 permanent possesses a long-lasting antimicrobial effect, but this effect appears to diminish greatly with time. Further investigation is needed to determine whether or not the effect is actually permanent in nature. The N2 permanent was also shown to have broader antimicrobial effectiveness against the eight microorganisms tested. N2 permanent produced zones of inhibition against five of …

Dissolution And Precipitation Of Gypsum In The Soil Under Irrigation, Badier J. Alawi

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Two soils were used in this soil column study. Yolo loam soil a non-calcareous, non-gypsiferous soil from central California and Vernal soil a calcareous soil from eastern Utah.

Initial studies were conducted where the solubilities of pure CaC0₃ and CaS0₄ ' 2H₂0 were determined in the presence of Logan river water, a KCl solution (2.8 mmhos/cm) and a K₂S0₄ solution (2. 7 mmhos/cm). Gypsum was more soluble in the KCl solution than in the K₂S0₄ solution. The solubility product of both gypsum and lime were determined from the analytical …

Comparison Of Interferon Produced In Vitro By Monkey Kidney Cells Demonstrating Interference Against Polio Ii, Coxsackie A-9, Influenza A2/Hong Kong/68, And Echo-9 Viruses, Archer Duncan Farmer Jr.

Biological Sciences Theses & Dissertations

Abstract unavailable