U.S. Agricultural Exports: Projected Changes under FAIR and Potential Unanticipated Changes

International Relations/Trade,

From the 'Keeparra' to the 'Cultural Bind' - An Analysis of the Aboriginal Situation

This paper discusses the loss of culture experienced by the Aboriginal communities in the mission, rural, and urban contexts. The cultural bind experienced by the communities due to not having a future in modern western society, and losing their traditional cultural roots through displacement

Neutrons transition densities for the 2+−8+2^+-8^+ multiplet of states in 90^{90}Zr

The neutron transition densities of the $2^+-8^+$ levels in $^{90}$Zr were extracted in the process of analysing ({\bf p},p') scattering at 400 Mev. Its comparison with the proton transition densities for these levels was undertaken. The radial shapes of the experimental neutron and proton transition densities for each state were found to be different.Comment: 9 pages, 4 figure

Molecular recognition on acoustic wave devices

Microporous thin films composed either of zeolite crystals embedded in sol-gel derived glass or of a molecular coupling layer, zeolite crystals and a porous silica overlayer, were formed on the gold electrodes of Quartz Crystal Microbalances (QCM). The microporosity of the thin films was characterized by in situ nitrogen and vapor sorption isotherms. Both preparation methods result in thin films with substantial microporosity. Selective adsorption based on molecular size exclusion from the microporous films could be achieved

CHANGING TOBACCO MARKETS: EFFECTS ON BURLEY TOBACCO FARMS

Three representative Tennessee tobacco farms are used to estimate farm-level impacts of (1) program continuation with further quota cuts, and (2) program elimination in 2000. Results indicate that program elimination has more potential to reduce farm income and that larger and more diversified farms are less affected in both scenarios.tobacco, farm-level analysis, representative farms, Tennessee agriculture, Agricultural and Food Policy, Crop Production/Industries,

POTENTIAL FARM-LEVEL IMPACTS OF PROPOSED FQPA IMPLEMENTATION: THE TENNESSEE CASE

This research estimates farm-level impacts of a potential ban on organophosphates and carbamates under the FQPA. Insecticide expenditure and first- and fifth-year yield impacts are estimated for five Tennessee representative farms. Results indicate that within five years, the ban could reduce net farm income on Tennessee farms by 16 to 46 percent.FQPA, organophosphates, carbamates, insecticides, farm-level analysis, Agricultural and Food Policy, Environmental Economics and Policy,

Automated seed manipulation and planting

The Mechanical Division fabricated three seed separators utilizing pressure gradients to move and separate wheat seeds. These separators are called minnow buckets and use air, water, or a combination of both to generate the pressure gradient. Electrostatic fields were employed in the seed separator constructed by the Electrical Division. This separator operates by forcing a temporary electric dipole on the wheat seeds and using charged electrodes to attract and move the seeds. Seed delivery to the hydroponic growth tray is accomplished by the seed cassette. The cassette is compatible with all the seed separators, and it consists of a plastic tube threaded with millipore filter paper. During planting operations, the seeds are placed in an empty cassette. The loaded cassette is then placed in the growth tray and nutrient solution provided. The solution wets the filter paper and capillary action draws the nutrients up to feed the seeds. These seeding systems were tested and showed encouraging results. Seeds were effectively separated and the cassette can support the growth of wheat plants. Problems remaining to be investigated include improving the success of delivering the seeds to the cassette and providing adequate spacing between seeds for the electric separator

Automated seed manipulation and planting

Activities for the Fall Semester, 1987 focused on investigating the mechanical/electrical properties of wheat seeds and forming various Seed Planting System (SPS) concepts based on those properties. The Electrical Division of the design group was formed to devise an SPS using electrostatic charge fields for seeding operations. Experiments concerning seed separation using electrical induction (rearranging of the charges within the seed) were conducted with promising results. The seeds, when exposed to the high voltage and low current field produced by a Van de Graff generator, were observed to move back and forth between two electrodes. An SPS concept has been developed based on this phenomena, and will be developed throughout the Spring Semester, 1988. The Mechanical Division centered on SPS concepts involving valves, pumps, and fluids to separate and deliver seeds. An SPS idea utilizing the pressure difference caused by air as it rushes out of holes drilled in the wall of a closed container has been formulated and will be considered for future development. Also, a system of seed separation and delivery employing a combination of centrifugal force, friction, and air flow was considered

Argonaute-Bound Small RNAs from Promoter-Proximal RNA Polymerase II

Argonaute (Ago) proteins mediate posttranscriptional gene repression by binding guide miRNAs to regulate targeted RNAs. To confidently assess Ago-bound small RNAs, we adapted a mouse embryonic stem cell system to express a single epitope-tagged Ago protein family member in an inducible manner. Here, we report the small RNA profile of Ago-deficient cells and show that Ago-dependent stability is a common feature of mammalian miRNAs. Using this criteria and immunopurification, we identified an Ago-dependent class of noncanonical miRNAs derived from protein-coding gene promoters, which we name transcriptional start site miRNAs (TSS-miRNAs). A subset of promoter-proximal RNA polymerase II (RNAPII) complexes produces hairpin RNAs that are processed in a DiGeorge syndrome critical region gene 8 (Dgcr8)/Drosha-independent but Dicer-dependent manner. TSS-miRNA activity is detectable from endogenous levels and following overexpression of mRNA constructs. Finally, we present evidence of differential expression and conservation in humans, suggesting important roles in gene regulation.United States. Public Health Service (grant RO1 GM34277)National Cancer Institute (U.S.) (PO1-CA42063)National Cancer Institute (U.S.) (Koch Institute Support (core) grant P30-CA14051)National Institutes of Health (U.S.). Ruth L. Kirschstein National Research Service Award (F32GM101872)National Institutes of Health (U.S.). Ruth L. Kirschstein National Research Service Award (F32CA139902