The Botanic Journal Club of the Ohio State University

Author Institution: Department of Botany and Plant Pathology, The Ohio State University, Columbus 10small but important group of early (1899) students of biology formed a club called the Ohio Botanic Journal Club. Some of these persons became well known in later years. Their early work and aspirations are noted in this pape

F(loyd) A(lonzo) McClure (1897-1970)

Author Institution: Professor Emeritus of Botany, The Ohio State University, Columbus, Ohio 4321

The Thermal Stability of Unsymmetrical Dimethylhydrazine

The thermal stability of unsymmetrical dimethylhydrazine was investigated in a static system simulating conditions in an almost-empty fuel tank. The self-ignition temperature and spontaneous decomposition temperature of the pure fuel were determined at atmospheric pressure to be 454 and 740 F. respectively, with the larger (740 F) value, obtained in an inert atmosphere of nitrogen, representing the minimum temperature that would cause a rapid exothermic reaction. The addition of 40 weight percent dimethylenetriamine to unsymmetrical dimethylhydrazine did not significantly affect these properties

The Missing Curriculum Link: Personal Financial Planning

With increasing personal and business financial challenges facing today’s professionals, we, as business school faculty, have a responsibility to offer the educational background that should enable rising professionals to successfully manage finances.  Unfortunately, the results of a recent analysis of curriculum offerings in Personal Financial Planning indicate that we, as faculty, have not fully accepted this responsibility.  Only three out of the 131 four-year institutions reviewed have a required Personal Financial Planning course in their curriculums. Quite frankly, we’re permitting launching a generation of students who are unprepared to manage both their own and potentially others’ financial affairs.  With that shortfall of a course offering as a backdrop, we suggest the following content for a required Personal Financial Planning course for all students majoring in Business Administration

Dominance of grain size impacts on seasonal snow albedo at deforested sites in New Hampshire

Snow cover serves as a major control on the surface energy budget in temperate regions due to its high reflectivity compared to underlying surfaces. Winter in the northeastern United States has changed over the last several decades, resulting in shallower snowpacks, fewer days of snow cover, and increasing precipitation falling as rain in the winter. As these climatic changes occur, it is imperative that we understand current controls on the evolution of seasonal snow albedo in the region. Over three winter seasons between 2013 and 2015, snow characterization measurements were made at three open sites across New Hampshire. These near-daily measurements include spectral albedo, snow optical grain size determined through contact spectroscopy, snow depth, snow density, black carbon content, local meteorological parameters, and analysis of storm trajectories using the Hybrid Single-Particle Lagrangian Integrated Trajectory model. Using analysis of variance, we determine that land-based winter storms result in marginally higher albedo than coastal storms or storms from the Atlantic Ocean. Through multiple regression analysis, we determine that snow grain size is significantly more important in albedo reduction than black carbon content or snow density. And finally, we present a parameterization of albedo based on days since snowfall and temperature that accounts for 52% of variance in albedo over all three sites and years. Our improved understanding of current controls on snow albedo in the region will allow for better assessment of potential response of seasonal snow albedo and snow cover to changing climate

Variation of pressure limits of flame propagation with tube diameter for various isooctane-oxygen-nitrogen mixtures

An investigation was made of the change in the pressure limits of flame propagation with tube diameter for various isooctane-oxygen-nitrogen mixtures. Pressure limits were measured in cylindrical glass tubes of four different inside diameters at six different oxygen-nitrogen ratios. Under the experimental conditions, flame propagation was found to be impossible in isooctane-oxygen mixtures with oxygen concentrations less than 11 to 12 percent. Critical tube diameters for flame propagation were calculated and the effect of pressure was determined and compared with the effect of pressure on quenching distance. Critical diameters were related to flame speeds for various isooctane-oxygen-nitrogen mixtures

Analytical and Experimental Studies of a Divided-flow Ram-jet Combustor

Results of a theoretical and experimental study of the total pressure losses and combustion efficiencies associated with the divided-flow combustor are presented and comparisons made with the nondivided-flow combustor. The theoretical treatment indicated the range of primary-zone size, primary-zone air flow, and flame-holder pressure-loss coefficients over which the total-pressure loss through the divided-flow combustor was less than that through the nondivided-flow combustor. The experimental work indicated the range of fuel-air ratios, for a given size primary zone, over which the combustion efficiency in the divided-flow combustor was higher than that in the nondivided-flow combustor

Profiles

Biographical sketches of 4 accountants: Edward P. Moxey, Jr. By Adolph Matz; John McDonald By Harvey Mann; George Soule By Vahe Baladouni; Willard J. Graham By R. E. Ziegler