Separation of Carbon from Deinking Waste by Means of Flotation

The technique of froth flotation, as practiced in the separation of mineral ores, has been applied to the separation of carbon black from the deinking waste of the paper industry. On the theory that carbon black (from ink) has a positive charge in water, and clay and cellulose fibers have negative charges in water, experiments were of two types. First, it was attempted to float the carbon from the clay and cellulose fibers. Second, it was attempted to float the clay and cellulose fibers from the carbon. Several possible formulas were found for separating carbon black from deinking waste. Favorable results were obtained in both types of experiments

Dynamic stability test results on an 0.024 scale B-1 air vehicle

Dynamic longitudinal and lateral-directional stability characteristics of the B-1 air vehicle were investigated in three wind tunnels at the Langley Research Center. The main rotary derivatives were obtained for an angle of attack range of -3 degrees to +16 degrees for a Mach number range of 0.2 to 2.16. Damping in roll data could not be obtained at the supersonic Mach numbers. The Langley 7 x 10 foot high speed tunnel, the 8 foot transonic pressure tunnel, and the 4 foot Unitary Plan wind tunnel were the test sites. An 0.024 scale light-weight model was used on a forced oscillation type balance. Test Reynolds number varied from 474,000/ft to 1,550,000/ft. through the Mach number range tested. The results showed that the dynamic stability characteristics of the model in pitch and roll were generally satisfactory up to an angle attack of about +6 degrees. In the wing sweep range from 15 to 25 degrees the positive damping levels in roll deteriorated rapidly above +2 degrees angle of attack. This reduction in roll damping is believed to be due to the onset of separation over the wing as stall is approached

The Old Dominion and the New Nation: 1788–1801

This comprehensive study—an honorable mention in the 1971 Frederick Jackson Turner Award competition— traces the emergence and development of the Republican and Federalist party organizations in Virginia and shows how the old oligarchic system based on wealth, influence, and social prestige remained strong in that state after the formation of the new nation. The book covers details of the Virginia Antifederalists’ continuing hostility to the federal Constitution, James Madison’s switch from the Federalist party to the emerging Republican party, Madison’s and Jefferson’s attempts to coordinate Republican opposition to Federalist foreign policy, and the Republicans’ successful campaign in 1800 to replace President John Adams with a Virginian. Richard R. Beeman’s central concern is the style of political life in Virginia and the effect of that style on national party alignments, and his findings demonstrate that the mode of political conduct displayed by Virginia’s leaders proved increasingly self-indulgent and dysfunctional by 1800. Richard R. Beeman is assistant professor of history at the University of Pennsylvania.https://uknowledge.uky.edu/upk_united_states_history/1045/thumbnail.jp

Conceptual design optimization study

The feasibility of applying multilevel functional decomposition and optimization techniques to conceptual design of advanced fighter aircraft was investigated. Applying the functional decomposition techniques to the conceptual design phase appears to be feasible. The initial implementation of the modified design process will optimize wing design variables. A hybrid approach, combining functional decomposition techniques for generation of aerodynamic and mass properties linear sensitivity derivatives with existing techniques for sizing mission performance and optimization, is proposed

Instream Flows in Idaho

23 pages. Contains footnotes

The Global Competitive Challenge For EMBA Students

This article describes the birth and development of an innovative international business course called the Global Competitive Challenge. The paper highlights the process of developing the course and how the course is being updated to meet the requirements of current participants in an EMBA program

Implications of the Tribolium genome project for pest biology

Implications of the Tribolium genome project for pest biology The universal availability of the complete Tribolium castaneum genome sequence assembly and annotation (Richards et al., 2008) and concomitant development of the versatile Tribolium genome browser, BeetleBase (Kim et al., 2010, http://beetlebase.org/) open new realms of possibility for stored product pest control by greatly simplifying the task of connecting biology and behavior with underlying molecular mechanisms. This genome has enabled sequence similarity searches that have resulted in a flood of new discovery involving thousands of genes with important functions in digestion, osmoregulation, metamorphosis, olfaction, xenobiotic metabolism, vision, and embryonic and larval growth and development. The value of the T. castaneum genome sequence is greatly enhanced by the availability of a sophisticated functional genomic toolkit for laboratory studies of this insect. These tools include high-resolution physical and genetic maps, genomic and cDNA libraries, balancer chromosomes, and effective and reliable techniques for specific knockout of any target gene via RNA interference (RNAi). In this paper we briefly discuss just two areas of Tribolium biology research that are being revitalized by the availability of the genome sequence, namely olfaction and exoskeleton, or “smell and skin”

Genetic structure of Tribolium castaneum populations in mills

We investigated the genetic diversity and differentiation among nine populations of Tribolium castaneum using eight polymorphic loci, including microsatellites and other insertion-deletion polymorphisms (=”indels”). Samples were collected in food processing/storage facilities located in Kansas, Nebraska, California, Louisiana, Florida and Puerto Rico. Standard population genetic analysis was applied, and an assignment test was used to assign individuals to their genetic population. All loci were polymorphic across populations, with the number of alleles per locus-population combination varying from three to fourteen. Among 72 locus-by-population combinations, 31 deviated significantly from Hardy-Weinberg equilibrium, which was associated with a deficiency in heterozygosity. Tribolium castaneum populations show some level of genetic structuring. Genetic differentiation between populations, using FST estimates, was significant, with FST varying from 0.018 to 0.149. AMOVA indicated that 8.32% of the variation in allele frequency resulted from comparisons among populations. Genetic distance was not significantly correlated with geographic distance. Correct assignment to the genetic population was possible in only 56% of all individuals. Together, these results revealed that geographically distinct populations of T. castaneum had low to moderate levels of genetic differentiation that was not correlated with geographic distance, and the genotypic profile of the individuals did not provide enough information for fingerprinting them with their source population. Keywords: Tribolium castaneum, Population genetics, Genetic structure, FST, Genetic fingerprintin