A study of conformation and the correlation of parts in ears of maize

Approved, M. MillerTypescriptIncludes 23 leaves of chartsM.A. University of Missouri 1912Volume upon volume has been written and page after page of statistical material has been compiled in regard to the yield of corn, the various varieties, the many soil requirements and the fertilizing problems. Notwithstanding all this vast amount of data and all of this work that has been done, we find but comparatively little in regard to the individual ear and its various characteristics. Not only was it decided to study the various ear characters in regard to their effect upon the shelling percent, but several other problems were included. The investigations carried on in the study of this problem may be said to cover six lines of investigation as well as various closely associated considerations. These main lines of investigations include the relation existing between: I. Ear character and shelling percent. II. Kernel character and shelling percent. III. Cob character and shelling percent. IV. Ear character and rapidity of curing. V. Kernel character and rapidity of curing. VI. Cob character and rapidity of curing. Of course, these various subjects serve but to indicate the line of work as the characters crossed and interlaced so completely that the actual data secured in pursuance of the investigational work was greatly increased

Some factors in wheat production

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A hybrid life cycle assessment of public transportation buses with alternative fuel options

Purpose: Alternative fuel options are gaining popularity in the vehicle market. Adopting alternative fuel options for public transportation compared to passenger vehicles contributes exponentially to reductions in transportation-related environmental impacts. Therefore, this study aims to present total air pollutant emissions and water withdrawal impacts through the lifetime of a transit bus with different fuel options. Methods: In consideration of market share and future development trends, diesel, biodiesel, compressed natural gas (CNG), liquefied natural gas (LNG), hybrid (diesel-electric), and battery electric (BE) transit buses are analyzed with an input-output (IO)-based hybrid life cycle assessment (LCA) model. In order to accommodate the sensitivity of total impacts to fuel economy, three commonly used driving cycles are considered: Manhattan, Central Business District (CBD), and Orange County Transit Authority (OCTA). Fuel economy for each of these driving cycles varies over the year with other impacts, so a normal distribution of fuel economy is developed with a Monte Carlo simulation model for each driving cycle and corresponding fuel type. Results and discussion: Impacts from a solar panel (photovoltaic, PV) charging scenario and different grid mix scenarios are evaluated and compared to the nation’s average grid mix impacts from energy generation to accommodate the lifetime electricity needs for the BE transit bus. From these results, it was found that the BE transit bus causes significantly low CO2 emissions than diesel and other alternative fuel options, while some of the driving cycles of the hybrid-powered transit bus cause comparable emissions to BE transit bus. On the other hand, lifetime water withdrawal impacts of the diesel and hybrid options are more feasible compared to other options, since electricity generation and natural gas manufacturing are both heavily dependent on water withdrawal. In addition, the North American Electricity Reliability Corporation’s (NERC) regional electricity grid mix impacts on CO2 emissions and water withdrawal are presented for the BE transit bus. Conclusions: As an addition of current literature, LCA of alternative fuel options was performed in this paper for transit buses with the consideration of a wide variety of environmental indicators. Although the results indicate that BE and hybrid-powered buses have less environmental emissions, the US’s dependency on fossil fuel for electricity generation continues to yield significant lifetime impacts on BE transit bus operation. With respect to water withdrawal impacts, we believe that the adoption of BE transit buses will be faster and more environmentally feasible for some NREC regions than for others

Probing systems in solution by NMR using sulfur hexafluoride as a spy molecule

SCOPUS: ar.jinfo:eu-repo/semantics/publishe