Reduction of the Two Body Problem in N=2 Chern Simons Supergravity

By an extension of the methods used for the reduction of the two body problem in 2+1 dimensional gravity, we show that the two body problem in N=2 Chern Simons supergravity can be reduced exactly to an equivalent on body formalism. We give exact expressions for the invariants of the reduced one body problem.Comment: 9 pages, LaTe

Towards electron transport measurements in chemically modified graphene: The effect of a solvent

Chemical functionalization of graphene modifies the local electron density of the carbon atoms and hence electron transport. Measuring these changes allows for a closer understanding of the chemical interaction and the influence of functionalization on the graphene lattice. However, not only chemistry, in this case diazonium chemistry, has an effect on the electron transport. Latter is also influenced by defects and dopants resulting from different processing steps. Here, we show that solvents used in the chemical reaction process change the transport properties. In more detail, the investigated combination of isopropanol and heating treatment reduces the doping concentration and significantly increases the mobility of graphene. Furthermore, the isopropanol treatment alone increases the concentration of dopants and introduces an asymmetry between electron and hole transport which might be difficult to distinguish from the effect of functionalization. The results shown in this work demand a closer look on the influence of solvents used for chemical modification in order to understand their influence

SWINE PRODUCTION NETWORKS IN MINNESOTA: RESOURCES FOR DECISION MAKING

Swine production networks are becoming a significant part of the Minnesota swine industry, with at least 30 production networks in operation as of late 1995. There are probably at least 450 producers involved, representing at least nine percent of the state s sow inventory. Not counted in these numbers are a few other networks involved only in data-sharing or marketing as well as a large number of farmer-to-farmer custom/contract arrangements. We interviewed 20 producers involved in networks. None of the networks we surveyed had been in operation very long, with most in business no more than a year or two. It is too early to predict what their long-term success will be. Most of the respondents seemed pleased with the arrangements so far. An example financial analysis of a 1,400 sow network is presented in the paper. Pig pricing formulas and custom rates are discussed for sharing risks among the farrower, nursery and finisher members of the network. The staff paper is 34 pages plus a 26 page annotated reading list of other publications on networking and segregated early weaning.Livestock Production/Industries,

The development of a road profile measuring device with reference to endurance testing of motor vehicles

Includes bibliography.This project describes the development of a device to measure the profile of a road. The data describing the roads characteristics are used to compare the qualities of the test tracks at present used by Volkswagen SA (Pty) Ltd for endurance testing of their products, and the Synthetic Road used on their new hydraulic road simulator

A Comparison of the Surface Polysaccharides from Rhizobium japonicum strains I110ARS and 61A76str, and the Isolation of Soybean Root Proteins Responsible for the Binding of EPS from R. japonicum strain I110ARS

The surface polysaccharides of Rhizobium are implicated in the symbiotic process. The composition of the surface polysaccharides from two strains of Rhizobium japonicum, I110 ARS and 61A76 str, have been compared. Five polysaccharide fractions are obtained from the I110 ARS strain. They are the EPS (extracellular polysaccharide), CPS-1 and CPS-2 (capsular polysaccharide fractions), LPS (lipopolysaccharide) and Phe (polysaccharide found in the phenol layer from the phenol/water extraction). These polysaccharide fractions have identical sugar compositions. Four polysaccharide fractions are obtained from the 61A76 str strain. These are the EPS, CPS-1, SmPS (small molecular weight polysaccharide), and Phe. Each of these polysaccharide fractions has a different sugar composition. The 61A76 str strain does not have a CPS-2 or an LPS fraction. These results show that the I110 ARS and 61A76 str strains are not closely related in their surface polysaccharides. However, one similarity is found between the two strains. The compositions of the CPS-1 fractions from both strains are qualitatively similar. This similarity may explain why both strains are able to infect soybean plants. Neither of the R. japonicum strains appears to have a typical LPS. The I110 ARS strain possesses an LPS fraction, however, upon analysis it was found that it contained a very low amount, 0.02%, of KDO and it is not affected by mild acid treatment. In a normal LPS, KDO makes up 3-5% of the total mass and treatment with a mild acid causes hydrolysis of the bond between the lipid and the polysaccharide. The 61A76 str. strain does not possess a polysaccharide fraction which elutes from a Sepharose 48 column where a typical LPS elutes. These surface polysaccharides may interact with proteins on the surface of the soybean root. Attempts were also made at isolating these protein molecules using root protein fractions and an EPS-acrylamide affinity column. About 9% of two protein fractions, the surface and membrane proteins, was found to bind to the column. Attempts to release the bound material proved to be ineffective. All of these results are discussed with regard to their role in the R. japonicum-soybean symbiosis

Symptoms and Control of Zinc Deficiency in Corn

The purpose of this publication is to describe zinc deficiency symptoms in corn and to present recommendations for applications of zinc fertilizer