Investigating the Interactions Between Cyanobacteria and Vibrio parahaemolyticus

One well-known pathogen that has been the topic of many recent studies is Vibrio parahaemolyticus, which causes thousands of foodborne illnesses a year, mostly from the ingestion of raw or undercooked oysters. It has been shown cyanobacteria can act as a long-term reservoir of Vibrio cholerae, another pathogenic Vibrio, by encasing the cells within mucilaginous sheaths during which Vibrios enter a viable but non-culturable state. In this study we investigated the interaction of V. parahaemolyticus with cyanobacteria to determine whether cyanobacteria aid in the longevity and survival of V. parahaemolyticus. We found that non-pathogenic V. parahaemolyticus strain G445 was able to persist better in the presence of cyanobacteria compared to pathogenic V. parahaemolyticus MDOH-04-5M732. G445 cells seem to cluster non-discriminately within the cyanobacterial mats, which may be due to specific interactions with cyanobacteria, yet further investigation is necessary

SHORT-PERIOD PRICING MODELS FOR FED CATTLE AND IMPACTS OF WHOLESALE CARCASS BEEF AND LIVE CATTLE FUTURES MARKET PRICES

Demand and Price Analysis,

The effect of small variations in profile of airfoils

This report deals with the effect of small variations in ordinates specified by different laboratories for the airfoil section. This study was made in connection with a more general investigation of the effect of small irregularities of the airfoil surface on the aerodynamic characteristics of an airfoil. These tests show that small changes in airfoil contours, resulting from variations in the specified ordinates, have a sufficiently large effect upon the airfoil characteristics to justify the taking of great care in the specification of ordinates for the construction of models

Comparison of Survey Results from Land Value & Rental Surveys: Differences and Synthesis

Land Economics/Use,

The Interference Effects on an Airfoil of a Flat Plate at Mid-span Position

This report gives the results of an investigation of the mutual interference of an airfoil and a flat plate inserted at mid-span position. The tests were conducted in the Variable-Density Wind Tunnel of the National Advisory Committee for Aeronautics at a high value of the Reynolds Number. The interference effects of this combination were found to be small. Supplementary tests indicated that the use of fillets decreases both the lift and drag slightly. A bibliography of publication dealing with interference between wings and bodies, and with the effects of cut-outs and fillets is included

AN EMPIRICAL STUDY OF COMPETITION IN THE PRICE DISCOVERY PROCESS FOR SLAUGHTER LAMBS

Buyer competition in the price discovery process for slaughter lambs at an Oklahoma teleauction was studied. Number of buyers positively influenced both absolute and relative sale prices but did not significantly affect buyer gross margins. Buyer market shares also affected prices paid and buyer gross margins. Thus, competition among buyers was found to be important in the price discovery process.Demand and Price Analysis, Livestock Production/Industries,

Beef Packers’ Captive Supplies: An Upward Trend? A Pricing Edge?

Livestock Production/Industries,

COMPARATIVE ANALYSIS OF SLAUGHTER LAMB PRICES

Data on weekly summaries of slaughter lamb sales in 1996 were analyzed to determine price differences for factors affecting lamb prices. Models were compared with a 1991 study and across regions. Demand and supply variables were found important as well as marketing methods, sale lot sizes, seasonal and regional variables.Livestock Production/Industries,

Supply Effects on Price Discovery and Pricing Choice for Fed Cattle

Price discovery research related to fed cattle has involved data covering a relatively small portion of the longer cattle cycle. Thus, research has not explicitly addressed the impacts alternative supply conditions have on price discovery. Additionally, little research has addressed the pricing choices for fed cattle marketing or procurement. In research reported here using data from an experimental market, the Fed Cattle Market Simulator, models were estimated that encompassed live weight, dressed weight, and grid pricing under alternative supply scenarios, specifically a larger supply and smaller supply period. Variables explaining fed cattle price variation differed somewhat between the two supply periods. For the two periods combined, results were nearly as theoretically expected. One consistent finding was that higher quality fed cattle marketed with a grid brought higher prices in both supply periods. Similarly, some differences were noted in the pricing choice model between the two periods and the combined periods. Another consistent finding was that having lower quality cattle to market increased the probability of marketing them on a live weight basis. Higher quality cattle were more apt to be marketed with a grid.Livestock Production/Industries,